CN115624819A - Fault inspection system and method for pulse bag-type dust collector - Google Patents

Abstract

The present invention provides a fault inspection system and method for a pulse bag filter. The system includes: a dust collector, the dust collector has an upper box body, a middle box body and an ash hopper, and a plurality of relatively independent sub-chambers are arranged in the middle box body , There are relative air inlets and outlets on both sides of the middle box, each compartment is provided with a first end and a second end opposite, each compartment is equipped with a cloth bag, and a poppet valve is installed near the first end, and a poppet is installed near the second end. The two ends are provided with an air inlet valve, the upper box is provided with a pulse valve, the outlet of the ash hopper is provided with an ash unloading valve, and a first detection component for obtaining the pressure difference between the compartments is provided between the first end and the second end The exhaust device connected to the air outlet, the outlet of the exhaust device is provided with a concentration detection part; the controller is at least electrically connected with the first detection component and the concentration detection part. The present invention can lock the fault point in the shortest time to gain time for maintenance; at the same time, it realizes intelligent inspection, reduces labor cost and improves management efficiency.

Description

Pulse bag filter fault inspection system and method

technical field

The invention relates to the technical field of pulse bag dust collectors, in particular to a fault inspection system and method for pulse bag dust collectors.

Background technique

The pulse bag filter is widely used in the steel and petrochemical industries. It uses the filter function of the fiber fabric to filter the dusty gas. When the dusty gas enters the dust collector, the dust will adhere to the outer surface of the filter bag and accumulate to a certain extent. Through the action of pulse jet blowing and reverse blowing, the bag expands to shake off the dust and drop it into the ash hopper, and then transport the dust outside through the conveying facility to complete the purification of the gas.

The raw materials, sintering, ironmaking, steelmaking and other production processes of iron and steel enterprises have many environmental dust generation points, all of which need to use pulse bag dry dust removal and purification facilities. An iron and steel enterprise basically has dozens of sets of pulse bag dust collectors, which require a lot of manpower and material resources for maintenance. In addition, the increase in labor costs and the development of intelligence in the steel industry require more efficient and more stable operation of the dust collectors.

The intelligent fault inspection of the dust collector is to analyze the relevant data through perfect detection methods, make timely predictions, provide key inspection objects for production inspections, save maintenance manpower, save maintenance time and cost, and be the fastest for the system. Provide a strong guarantee for the restoration of normal operation.

Conventional pulse bag filter mainly includes: upper box, middle box, ash hopper, ash cleaning system, ash conveying system, etc. Among them, dust cleaning generally adopts timing or fixed resistance cleaning. Among them, the fixed-resistance cleaning relies on the detection of the differential pressure at the inlet and outlet of the dust collector configured in the dust removal system. If the differential pressure exceeds the set value, pulse jet cleaning will be performed.

During the use of the pulse bag filter, various failures may occur, resulting in an increase in the concentration of smoke and dust at the outlet of the exhaust stack. For example, the filter efficiency decreases due to the fouling of the bag, or the bag is damaged or falls off, resulting in a change in the differential pressure between the inlet and outlet of the dust collector, which in turn leads to an increase in the concentration of smoke and dust at the outlet of the exhaust stack. At this time, manpower is required to check the status of the bag from warehouse to room. In the case of manual inspection, it is impossible to accurately determine in time which warehouse the cloth bag is damaged or falls off. It needs to be inspected warehouse by room, which requires more time and labor costs.

Contents of the invention

In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a pulse bag filter fault inspection system and method, which can lock the fault point in the shortest time and gain time for maintenance; at the same time, realize intelligent Inspection, reduce labor costs, improve management efficiency.

The above object of the present invention can be achieved by adopting the following technical solutions. The present invention provides a pulse bag filter fault inspection system, including:

Dust collector, the dust collector has a hollow upper box, a middle box and an ash hopper, a plurality of relatively independent sub-chambers are arranged in the middle box, and relative air inlets and Each of the sub-chambers is provided with an opposite first end and a second end, each of the sub-chambers is provided with a cloth bag, a poppet valve is provided near the first end, and an inlet valve is provided near the second end. Air valve, the upper box is provided with a pulse valve, the outlet of the ash hopper is provided with an ash unloading valve, and between the first end and the second end is provided for obtaining the chamber pressure. A poor first detection component; an exhaust device connected to the air outlet, the outlet of the exhaust device is provided with a concentration detection piece; a controller, at least connected with the first detection component and the concentration detection parts are electrically connected.

In a preferred embodiment, the pulse bag filter fault inspection system further includes: a second detection component for obtaining the pressure difference between the air inlet and the air outlet, and the second detection component is connected with the The controller is electrically connected.

In a preferred embodiment, the poppet valve is provided with a position detection member, and the poppet valve has a first position for opening the first end of the sub-chamber and a second position for closing the first end of the sub-chamber , the position detecting member is used to detect whether the poppet valve has reached the first position and/or the second position.

In a preferred embodiment, the ash unloading valve is provided with a first motor, and the fault inspection system of the pulse bag filter further includes: a first current detection element for obtaining the current of the first motor and a The first rotation speed detection part of the first motor speed, the first current detection part and the first rotation speed detection part are electrically connected to the controller.

In a preferred embodiment, the pulse bag filter fault inspection system further includes: a scraper machine arranged downstream of the dust discharge valve, the scraper machine is provided with a second motor, and the pulse bag dust collector The inverter fault inspection system further includes: a second current detection part for obtaining the current of the second motor and a second speed detection part for the speed of the second motor, the second current detection part and the first The two rotational speed detection parts are electrically connected with the controller.

In a preferred embodiment, the pulse bag filter fault inspection system further includes: a bucket elevator arranged downstream of the scraper machine, the bucket elevator is provided with a third motor, and the pulse bag dust collector The motor fault inspection system further includes: a third current detection part for obtaining the current of the third motor and a third speed detection part for the speed of the third motor, the third current detection part and the first The three rotation speed detection parts are electrically connected with the controller.

In a preferred embodiment, the fault inspection system of the pulse bag filter also includes: a dust cleaning assembly connected with the pulse valve, and the dust cleaning assembly includes: a blowing pipe, an air bag, and a A pulse controller in the working state of the pulse valve, the pulse controller is electrically connected to the controller.

In a preferred embodiment, the pulse bag filter fault inspection system further includes: a third detection component for obtaining the air bag pressure, and the third detection component is electrically connected with the controller.

In a preferred embodiment, a dust removal fan is arranged between the exhaust device and the air outlet.

In a preferred embodiment, a muffler is provided between the exhaust device and the dust removal fan.

A pulse bag filter fault inspection method of a pulse bag filter fault inspection system, the pulse bag filter fault inspection system includes: a dust collector, the dust collector has a hollow upper box, a middle box and The ash hopper is provided with a plurality of relatively independent sub-chambers in the middle box, opposite air inlets and air outlets are arranged on both sides of the middle box, and each of the sub-chambers is provided with opposite first ends and second end, each sub-chamber is provided with a cloth bag, a poppet valve is provided near the first end, the poppet valve is provided with a position detection piece, an air inlet valve is provided near the second end, and the upper box body A pulse valve is arranged on the top of the ash hopper, an ash unloading valve is arranged at the outlet of the ash hopper, and a first detection component for obtaining the pressure difference of the compartment is arranged between the first end and the second end; and The air outlet is connected to the exhaust device, the outlet of the exhaust device is provided with a concentration detection part; the ash cleaning assembly is connected to the pulse valve, and the ash cleaning assembly includes: a blowing pipe, an air bag , a pulse controller for controlling the working state of the pulse valve, and a third detection component for obtaining the air bag pressure; a controller, at least in communication with the first detection component, the concentration detection piece, the The position detection part of the poppet valve, the pulse controller, and the third detection component are electrically connected; the fault inspection method of the pulse bag filter includes:

When the concentration signal detected by the concentration detection part at the outlet of the exhaust device exceeds the preset concentration range, at least two rounds of pulse injection are performed on each sub-chamber, using the first detection component, the position detection part, the second The detected signals of the three detection components identify the location of the currently faulty compartment and the faulty object, and the faulty object includes any one or a combination of the following: cloth bags, poppet valves and pulse valves in the compartment .

In a preferred embodiment, when the concentration signal detected by the concentration detector at the outlet of the exhaust device exceeds the preset concentration range, the method includes: closing the poppet valve of the current sub-chamber, if the pressure of the current sub-chamber If the difference value is greater than the first pressure difference and the closing limit signal of the poppet valve of the current compartment is not received, it means that the poppet valve of the current compartment is faulty.

In a preferred embodiment, after the poppet valve of the current compartment is closed, if the pressure difference value of the current compartment is less than the second differential pressure and the closing limit signal of the poppet valve of the current compartment is received, it means that the poppet valve of the current compartment is in normal condition. state, the second pressure difference is less than the first pressure difference, start the pulse valve for injection, if the air bag pressure drops and cannot return to the preset pressure range, it means that the pulse valve of the current sub-chamber is faulty.

In a preferred embodiment, after starting the pulse valve for blowing, if the air bag pressure is within the preset pressure range, it means that the pulse valve of the current sub-chamber is in a normal state; if the poppet valve is opened, if the exhaust device The concentration signal detected by the concentration detector at the outlet exceeds the preset concentration range, and the differential pressure value of the current compartment increases. If the same situation occurs in the two rounds of detection, it is identified that the bag in the current compartment is faulty.

In a preferred embodiment, the ash unloading valve is provided with a first motor, and the fault inspection system of the pulse bag filter further includes: a first current detection element for obtaining the current of the first motor and a The first rotation speed detection part of the first motor speed; the scraper machine arranged downstream of the dust discharge valve, the scraper machine is provided with a second motor for obtaining the second current of the second motor current detection part and a second speed detection part for the second motor speed, the first current detection part, the first speed detection part, the second current detection part, the second speed detection part and The controller is electrically connected, and after the injection process is completed, the fault inspection method of the pulse bag filter also includes starting the ash unloading process.

In a preferred embodiment, in the process of starting the ash unloading process, first start the scraper machine, if the current signal and the speed signal of the second motor are not received, it means that the scraper machine appears Fault.

In a preferred embodiment, after starting the scraper machine, if the current signal and speed signal of the second motor are received, it means that the current scraper machine is in a normal working state, and the dust discharge valves are started sequentially, If the current signal and the rotational speed signal of the first motor are not received, it means that the ash unloading valve is out of order.

In a preferred embodiment, the pulse bag filter fault inspection system further includes: a bucket elevator arranged downstream of the scraper machine, the bucket elevator is provided with a third motor, and the pulse bag dust collector The motor fault inspection system further includes: a third current detection part for obtaining the current of the third motor and a third speed detection part for the speed of the third motor, the third current detection part and the first The three-speed detection part is electrically connected to the controller. When starting the scraper machine, it also includes starting the bucket elevator. If the current signal and the speed signal of the third motor are not received, it means that the The bucket elevator is malfunctioning.

The technical solution of the present invention has the following significant beneficial effects:

Overall, the pulse bag filter fault inspection system and method provided by this application, in the pulse bag filter fault inspection system, a detection device for obtaining signals is set at a specific location, based on the pulse bag filter fault inspection System, after implementing the pulse bag filter fault inspection method, can lock the fault point in the shortest time and buy time for maintenance; at the same time, realize intelligent inspection, reduce labor costs, and improve management efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help the understanding of the present invention, and do not specifically limit the shapes and proportional dimensions of the components in the present invention. Under the teaching of the present invention, those skilled in the art can select various possible shapes and proportional dimensions according to specific situations to implement the present invention.

Fig. 1 is a front view of a pulse bag filter fault inspection system provided in the embodiment of the present invention;

Fig. 2 is a side view of a pulse bag filter fault inspection system provided in the embodiment of the present invention;

Fig. 3 is a partial schematic diagram of a pulse bag filter fault inspection system provided in the embodiment of the present invention;

Fig. 4 is a flowchart of fault inspection of a pulse bag filter provided in the embodiment of the present invention;

Fig. 5 is a schematic diagram of signal transmission in a pulse bag filter fault inspection system provided in an embodiment of the present invention.

Explanation of the symbols of the above drawings:

100. Dust collector;

110. Middle box;

101. Air inlet;

102. Air outlet;

120. Division;

130. Poppet valve;

131. Position detection part;

140. Ash bucket;

150. Pulse valve;

160. Ash unloading valve;

201. The first detection component;

202. The second detection component;

300. Exhaust device;

301. Concentration detection kit;

400. Scraper machine;

500. Bucket elevator;

600. Ash removal component;

700. Dust removal fan;

800. Muffler.

Detailed ways

The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted", "connected" and "connected" should be interpreted in a broad sense, for example, it may be a mechanical connection or an electrical connection, or it may be the internal communication of two components, either directly or indirectly through an intermediary, Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

From the perspective of environmental protection, the dust emission concentration at the outlet of the dust collector is the most critical detection data, so as to avoid the dust concentration exceeding the standard for a long time.

A fault inspection system and method for a pulse bag filter provided by this application aims to control the dust emission concentration at the outlet of the dust collector. Timing dust removal detection, dust discharge valve and scraper machine can adopt timing method. Carry out routine injection and ash transportation and unloading according to the preset time.

When the dust concentration at the outlet rises abnormally, stop the scheduled offline injection, immediately start two rounds of offline injection in the chamber, and use the detection data such as chamber differential pressure, limit signal, pressure signal, and outlet concentration fluctuation to gradually control the lift valve, The pulse valve and bag are checked for faults until the fault chamber and corresponding equipment are locked.

Please refer to Figure 1, Figure 2 and Figure 3 together. In order to lock the fault point in the shortest time and gain time for maintenance; at the same time, realize intelligent inspection, reduce labor costs, and improve management efficiency. The embodiment of the present invention provides a pulse The bag filter fault inspection system, the pulse bag filter fault inspection system may include: a dust collector 100, the dust collector 100 has a hollow upper box, a middle box 110 and an ash hopper 140, in the middle box A plurality of relatively independent sub-chambers 120 are arranged in the body 110, opposite air inlets 101 and air outlets 102 are arranged on both sides of the middle box body 110, and each of the sub-chambers 120 is provided with opposite first ends and second ends Each sub-chamber 120 is provided with a cloth bag, a poppet valve 130 is provided near the first end, an air inlet valve is provided near the second end, a pulse valve 150 is provided on the upper box, and the An ash unloading valve 160 is provided at the outlet of the ash hopper 140, and a first detection component 201 for obtaining the pressure difference of the sub-chamber 120 is provided between the first end and the second end; and the air outlet 102 is connected to the exhaust device 300, the outlet of the exhaust device 300 is provided with a concentration detection part 301; the controller is electrically connected with the first detection component 201 and the concentration detection part 301.

In this embodiment, the pulse bag filter fault inspection system mainly includes: a dust collector 100, a controller, and necessary detection equipment, such as a pressure (difference) component, a concentration detection part 301, and the like.

The dust collector 100 has a hollow upper box body, a middle box body 110 and an ash hopper 140 , wherein a plurality of relatively independent compartments 120 are arranged in the middle box body 110 . The middle box 110 is provided with opposite air inlets 101 and air outlets 102 . As shown in FIG. 2 , each of the compartments 120 is provided with opposite first ends (opposite upper ends in FIG. 2 ) and second ends (opposite lower ends in FIG. 2 ). Each of the sub-chambers 120 is provided with a cloth bag, and the number of the cloth bags can be multiple, and the specific number of the cloth bags can vary according to the application scenarios and dust removal requirements of the dust collector 100, which are not discussed in this application. Specific limits. A poppet valve 130 is provided near the first end of each sub-chamber 120 , and the poppet valve 130 is used to control the opening and closing of the first end of the sub-chamber 120 . An air inlet valve is provided near the second end of each sub-chamber 120 . A pulse valve 150 is arranged on the upper box. The ash hopper 140 is used to collect the separated solid dust. An ash unloading valve 160 is provided at the outlet of the ash hopper 140 . Wherein, when the ash unloading valve 160 is opened, the solid dust in the ash hopper 140 can be discharged to the outside.

The pulse valve 150 is used to clean the bag. According to the size of the dust collector 100, the number of the pulse valves 150 can be multiple groups, and the multiple groups of pulse valves 150 can be directly controlled by a controller (such as PLC control), or controlled by a pulse controller. A group of pulse valves 150 is opened each time to remove the dust of the part of the bag or filter cartridge it controls, while other bags or filter cartridges work normally. After a period of time, the next group of pulse valves 150 is opened to clean up the next part.

The working process of the dust collector 100 is as follows: when the dust-laden gas enters the dust collector 100 from the air inlet 101, it first encounters the blocking parts in the middle of the air inlet and outlet 102, such as inclined plates and baffles, and the air flow turns to flow into the ash hopper 140, and at the same time the air flow The speed slows down, and due to inertia, the coarse dust particles in the gas flow directly into the ash hopper 140, which plays the role of pre-collecting dust; the airflow entering the ash hopper 140 then folds upwards and passes through the filter bag with a metal skeleton inside. On the outer surface of the filter bag (i.e. cloth bag), the purified gas enters the upper clean room of the filter bag room and is collected at the air outlet 102 to be discharged. During the process of purifying the dust-laden gas through the filter bag, more and more dust will accumulate on the filter bag with the increase of time, which will increase the resistance of the filter bag and cause the treatment air volume to gradually decrease. In order to ensure the normal operation of the dust collector 100, the resistance should be controlled within a preset range (for example—less than 1500 Pa). Once the preset range is exceeded, the filter bag needs to be cleaned. During cleaning, the pulse controller triggers each control valve to open the pulse valve 150 in sequence, and the compressed air in the air bag is sprayed from each hole of the injection pipe to each corresponding filter bag through the venturi tube. Inside, the filter bag expands rapidly in an instant, so that the dust accumulated on the surface of the filter bag falls off, and the filter bag returns to its original state. The cleaned dust falls into the ash hopper 140 and is discharged from the body through the ash discharge system. In this way, the dust accumulated on the filter bag is periodically pulse-jetted to clear the dust, so that the purified gas can pass through normally and ensure the operation of the dust removal system.

At the end of the system an exhaust device 300 is provided. Specifically, the exhaust device 300 may be in the form of a chimney. At the outlet of the exhaust device 300 is provided a concentration detection member 301, which is used to detect the concentration of dust discharged from the outlet of the chimney.

On the whole, the fault inspection system of the pulse bag filter is aimed at controlling the dust emission concentration at the outlet. Under normal discharge conditions, for example, when the dust concentration detected by the concentration detection part 301 is within the preset concentration range, the dust collector 100 Carry out work with above-mentioned work process. Wherein, the preset concentration range can be comprehensively determined according to on-site production needs and environmental protection requirements, and its specific value is not limited in this application.

When the dust concentration detected by the concentration detection part 301 exceeds the preset concentration range, it indicates that a certain component in the fault inspection system of the pulse bag filter may be faulty. Among them, the most likely and most direct impact on the dust concentration is the failure of the bag in the sub-chamber 120 . Once the cloth bag breaks down, the filtering effect on the solid particles in the flue gas will be greatly reduced, which will cause the dust concentration at the outlet of the exhaust device 300 to exceed the standard.

At present, in the prior art, each sub-chamber 120 can only be checked manually one by one to confirm whether the bag in the sub-chamber 120 is faulty.

However, in this application, by setting the first detection component 201 for obtaining the pressure difference of the sub-chambers 120 between the first end and the second end close to each sub-chamber 120, the controller detects through the first detection component 201 The differential pressure information of the sub-chambers 120 can directly determine which specific bag(s) in the sub-chambers 120 have failed.

Wherein, the specific form of the first detection component 201 can be a pressure sensor respectively arranged at the first end and the second end of the sub-chamber 120, or it can be directly in the form of a differential pressure transmitter, and the collection point of the differential pressure transmitter Distributed at the first end and the second end of the sub-chamber 120, of course, the specific form of the first detection component 201 is not limited to the above examples, and the present application does not make specific limitations here.

In the embodiment of the present application, when the dust concentration detected by the concentration detection part 301 exceeds the preset concentration range, the controller can immediately start a round of the sub-chamber 120 for pulse injection, combined with the detection data of the first detection component 201 After identifying which specific bag(s) of compartments 120 is faulty, a second round of testing can be performed after the first round of testing to verify the results of the first round of testing, thereby ensuring the accuracy of the testing results.

In one embodiment, the pulse bag filter fault inspection system further includes: a second detection component 202 for obtaining the pressure difference between the air inlet 101 and the air outlet 102, the second detection component 202 and The controller is electrically connected.

Wherein, the specific form of the second detection component 202 can be a pressure sensor respectively arranged at the air inlet 101 and the air outlet 102, or it can be directly in the form of a differential pressure transmitter, and the collection points of the differential pressure transmitter are distributed In the air inlet 101 and the air outlet 102 , of course, the specific form of the second detection component 202 is not limited to the above example, and the present application does not make a specific limitation here.

When a certain sub-chamber 120 inside the dust collector 100 or the bags of some sub-chambers 120 fails, the pressure difference detected by the second detection component 202 will also change synchronously. Therefore, the pressure difference detected by the second detection component 202 can also verify the accuracy of the detection result of the first detection component 201 .

In addition, the inventors found that the concentration fluctuations at the outlet of the exhaust device 300, and the influence factors exceeding the preset concentration range include other influence factors besides the cloth bag in the sub-chamber 120, for example, when the poppet valve 130 fails , it may also cause concentration fluctuations at the outlet of the exhaust device 300 .

In one embodiment, the poppet valve 130 is provided with a position detection member 131, and the poppet valve 130 has a first position for opening the first end of the compartment 120 and a position for closing the first end of the compartment 120. In the second position, the position detection member 131 is used to detect whether the poppet valve 130 reaches the first position and/or the second position.

When the poppet valve 130 is provided with a position detection element 131, the position detection element 131 is electrically connected to the controller, for example, when the controller sends a control instruction to the poppet valve 130 to make it reach the second position, the position detection element 131 is used to The position detection part 131 can determine whether the poppet valve 130 has reached the second designated position, and if it has not reached the second position, it can be judged that the poppet valve 130 has failed.

The inventors have found that the concentration fluctuations at the outlet of the exhaust device 300, the influence factors beyond the preset concentration range include other influence factors besides the cloth bag in the sub-chamber 120, for example, when the ash discharge valve 160 breaks down , may also cause concentration fluctuations at the outlet of the exhaust device 300 .

In one embodiment, the ash unloading valve 160 is provided with a first motor, and the fault inspection system for the pulse bag filter further includes: a first current detection element for acquiring the current of the first motor and a The first rotation speed detection part of the first motor speed, the first current detection part and the first rotation speed detection part are electrically connected with the controller.

Generally, the ash unloading valve 160 is provided with a first motor for providing power, and when the first motor fails, it may also cause concentration fluctuations at the outlet of the exhaust device 300 . In order to determine whether the first motor is faulty, a first current detection part for obtaining the current of the first motor and a first speed detection part for the rotation speed of the first motor can be set, the first current detection part It is electrically connected to the controller with the first rotation speed detection part, and the controller can determine the current first motor of the ash unloading valve 160 according to the current signal obtained by the first current detection part and the rotation speed signal obtained by the first rotation speed detection part. Is there a failure.

The inventors have found that the concentration fluctuations at the outlet of the exhaust device 300, the influence factors exceeding the preset concentration range include other influence factors besides the cloth bag in the sub-chamber 120, for example, when the scraper machine 400 breaks down , may also cause concentration fluctuations at the outlet of the exhaust device 300 .

In one embodiment, the pulse bag filter fault inspection system further includes: a scraper machine 400 arranged downstream of the dust discharge valve 160, the scraper machine 400 is provided with a second motor, and the pulse bag filter The precipitator fault inspection system also includes: a second current detection part for obtaining the current of the second motor and a second speed detection part for the second motor speed, the second current detection part and the The second rotational speed detection part is electrically connected with the controller.

Generally, the scraper machine 400 is provided with a second motor for providing power, and when the second motor fails, it may also cause concentration fluctuations at the outlet of the exhaust device 300 . In order to determine whether the second motor is faulty, a second current detection part for obtaining the current of the second motor and a second speed detection part for the speed of the second motor can be set, the second current detection part The second speed detection part is electrically connected to the controller, and the controller can determine the current second motor of the scraper 400 according to the current signal obtained by the second current detection part and the speed signal obtained by the second speed detection part. Is there a failure.

In an implementation scenario, the pulse bag filter fault inspection system may further include: a bucket elevator 500 arranged downstream of the scraper conveyor 400 . The bucket elevator 500 is used to provide power for transporting dust.

The inventors have found that the concentration fluctuations at the outlet of the exhaust device 300, the influencing factors exceeding the preset concentration range include other influencing factors besides the cloth bag in the sub-chamber 120, for example, when the bucket elevator 500 breaks down , may also cause concentration fluctuations at the outlet of the exhaust device 300 .

Specifically, the bucket elevator 500 is provided with a third motor, and the fault inspection system for the pulse bag filter further includes: a third current detection element for obtaining the current of the third motor and a third current detection element for the third motor. The third speed detection part of the motor speed, the third current detection part and the third speed detection part are electrically connected to the controller.

Generally, the bucket elevator 500 is provided with a third motor for providing power, and when the third motor fails, it may also cause concentration fluctuations at the outlet of the exhaust device 300 . In order to determine whether the third motor is faulty, a third current detection part for obtaining the current of the third motor and a third speed detection part for the speed of the third motor can be set, the third current detection part It is electrically connected to the controller with the third rotational speed detection part, and the controller can determine the current third motor of the bucket elevator 500 according to the current signal obtained by the third current detection part and the rotational speed signal obtained by the third rotational speed detection part. Is there a failure.

In one embodiment, the pulse bag filter fault inspection system may further include: a dust cleaning assembly 600 communicated with the pulse valve 150 . The ash removal assembly 600 is used to provide disturbance force to the ash accumulation in the ash hopper 140 .

Specifically, the dust cleaning assembly 600 includes: a blowing pipe, an air bag, and a pulse controller for controlling the working state of the pulse valve 150, and the pulse valve 150 and the pulse controller are electrically connected to the controller. sexual connection.

The inventors have found that the concentration fluctuations at the outlet of the exhaust device 300, which exceed the preset concentration range, include other influencing factors besides the cloth bag in the sub-chamber 120, for example, when the pulse valve 150 breaks down, Concentration fluctuations at the outlet of the exhaust device 300 may also be caused.

The pulse bag filter fault inspection system may also include: a third detection component for obtaining the air bag pressure, and the third detection component is electrically connected with the controller.

In order to determine whether the pulse valve 150 is faulty, a third detection component for obtaining the air bag pressure can be provided, the third detection component is electrically connected to the controller, and the controller can The component obtains the pressure signal of the current air bag, so as to determine whether the pulse valve 150 fails.

In a specific scenario, since there are many factors that cause the concentration fluctuation at the outlet of the exhaust device 300, the controller can make a comprehensive judgment based on various factors, so as to accurately identify the specific fault factor and the location of the sub-chamber 120 where the fault is located.

If the air bag pressure detection shows normal and regular fluctuations, and the situation is the same after two rounds of injection, it is considered that there is no problem with the pulse valve 150. If the pressure of the gas bag decreases compared with the normal value, and remains stable, but still cannot return to the normal value, it can be judged that there is a pulse valve 150 fault in the gas bag, start manual positioning to check the pulse valve 150 of the gas bag, and repair or replace it in time .

If the normal fluctuation of the air bag pressure is detected, the injection task is completed, and the poppet valve 130 is opened. At this time, if the concentration of flue gas and dust at the end of the system increases instantaneously, and the differential pressure value of the sub-chamber 120 increases, the same situation occurs in the two rounds of detection. Next, start manual positioning to check the bag, and focus on checking the dust accumulation of the bag.

If the dust concentration rises instantaneously, the differential pressure value of the compartment 120 is basically normal. At this time, it is necessary to manually locate and focus on checking the bag falling off and the wire opening. If the concentration at the detection outlet remains unchanged and the differential pressure of the compartment 120 is normal, the off-line injection task is ended.

What needs to be explained is that currently the dust removal system generally implements the ultra-low emission standard, the emission is ≤10mg/Nm ³ , and the emission concentration of the dust removal system is basically stable when the dust removal system is in stable operation. Different stable emission concentrations correspond to different indicators of abnormal increases. If it is below 1mg/Nm ³ for a long time, it suddenly increases by more than 3 times, which means an abnormal increase; if it is stable at 3-4 mg/Nm ³ for a long time, it is abnormally increased if it doubles; if it is stable at 6-8 mg/Nm for a long time ³ , basically more than 10mg/Nm ³ , indicating an abnormal increase. If it is stable at 8 or 9 mg/Nm ³ , a slight fluctuation is normal, and a slight fluctuation will exceed the standard. At this time, the fundamental problem must be solved systematically, and the emission cannot be stabilized at the upper limit for a long time.

As shown in FIG. 1 , in one embodiment, a dust removal fan 700 is disposed between the exhaust device 300 and the air outlet 102 . In addition, a muffler 800 is provided between the exhaust device 300 and the dust removal fan 700 .

Wherein, the dust removal fan 700 is mainly used to further remove dust from the flue gas flowing out of the air outlet 102 , so as to reduce the dust concentration at the outlet of the exhaust device 300 . The muffler 800 is used to reduce the noise of the smoke and dust flowing out of the dust removal fan 700 .

Please refer to FIG. 4 and FIG. 5 in conjunction. Based on the fault inspection system for the pulse bag filter provided in the above embodiment, the embodiment of the present application also provides a fault inspection method for the pulse bag filter. Wherein, the pulse bag filter fault inspection system includes: a dust collector 100, the dust collector 100 has a hollow upper box, a middle box 110 and an ash hopper, and a plurality of Relatively independent sub-chambers 120, opposite air inlets 101 and air outlets 102 are provided on both sides of the middle box 110, each of the sub-chambers 120 is provided with opposite first ends and second ends, each of the sub-chambers 120 A cloth bag is arranged inside, a poppet valve 130 is arranged near the first end, the poppet valve 130 is provided with a position detection member 131, an air inlet valve is arranged near the second end, and a pulse valve is arranged on the upper box. A valve 150, an ash unloading valve 160 is provided at the outlet of the ash hopper 140, and a first detection component 201 for obtaining the pressure difference of the sub-chamber 120 is provided between the first end and the second end; The exhaust device 300 connected with the air outlet 102, the outlet of the exhaust device 300 is provided with a concentration detection part 301; the ash removal assembly 600 connected with the pulse valve 150, the ash removal assembly 600 includes: a blowing pipe, an air bag, a pulse controller for controlling the working state of the pulse valve 150, and a third detection component for obtaining the pressure of the gas bag; a controller, at least connected with the first detection component 201 , the concentration detection part 301 , the position detection part 131 of the poppet valve 130 , the pulse controller, and the third detection component are electrically connected.

The fault inspection method of the pulse bag filter includes: when the concentration signal detected by the concentration detection part 301 at the outlet of the exhaust device 300 exceeds the preset concentration range, at least two rounds of pulse spraying are performed on each sub-chamber 120 Blow, using the detected signals of the first detection component 201, the position detection member 131, and the third detection component to identify the position of the sub-compartment 120 where the current failure occurs and the object that has failed, and the object that has failed includes the following Any one or a combination of: the bag in the sub-chamber 120, the poppet valve 130 and the pulse valve 150.

When the concentration signal detected by the concentration detector 301 at the outlet of the exhaust device 300 exceeds the preset concentration range, the method includes: closing the poppet valve 130 of the current sub-chamber 120, if the pressure difference value of the current sub-chamber 120 is greater than If the pressure difference is the first and the closing limit signal of the poppet valve 130 of the current sub-chamber 120 is not received, it means that the poppet valve 130 of the current sub-chamber 120 is faulty.

After closing the poppet valve 130 of the current sub-chamber 120, if the pressure difference value of the current sub-chamber 120 is less than the second pressure difference and the closing limit signal of the poppet valve 130 of the current sub-chamber 120 is received, it means that the poppet valve 130 of the current sub-chamber 120 is in a normal state , the second pressure difference is less than the first pressure difference, start the pulse valve 150 to spray, if the air bag pressure drops and cannot return to the preset pressure range, it means that the pulse valve 150 of the current sub-chamber 120 is faulty.

After starting the pulse valve 150 to blow, if the air bag pressure is within the preset pressure range, it means that the pulse valve 150 of the current sub-chamber 120 is in a normal state; The concentration signal detected by the concentration detection part 301 exceeds the preset concentration range, and the differential pressure value of the current sub-chamber 120 increases. If the same situation occurs in the two rounds of detection, it is identified that the bag in the current sub-chamber 120 is faulty.

In one embodiment, the ash unloading valve 160 is provided with a first motor, and the fault inspection system for the pulse bag filter further includes: a first current detection element for acquiring the current of the first motor and a The first rotation speed detection part of the first motor speed; the scraper machine 400 arranged downstream of the dust discharge valve 160, the scraper machine 400 is provided with a second motor for obtaining the second motor current Two current detection parts and a second speed detection part for the second motor speed, the first current detection part, the first speed detection part, the second current detection part, the second speed detection part The components are electrically connected to the controller, and after the injection process is completed, the fault inspection method of the pulse bag filter also includes starting the ash unloading process.

In the process of starting the ash unloading process, first start the scraper machine 400, if the current signal and the speed signal of the second motor are not received, it means that the scraper machine 400 is malfunctioning.

After starting the scraper machine 400, if the current signal and speed signal of the second motor are received, it means that the current scraper machine 400 is in a normal working state, and the dust discharge valve 160 is started sequentially. The current signal and speed signal of the first motor indicate that the ash unloading valve 160 is faulty.

In one embodiment, the pulse bag filter fault inspection system further includes: a bucket elevator 500 arranged downstream of the scraper machine 400, the bucket elevator 500 is provided with a third motor, and the pulse bag filter The precipitator fault inspection system further includes: a third current detection part for obtaining the current of the third motor and a third speed detection part for the rotation speed of the third motor, the third current detection part and the The third rotational speed detection part is electrically connected to the controller. When starting the scraper machine 400, it also includes starting the bucket elevator 500. If the current signal and rotational speed signal of the third motor are not received, Indicates that the bucket elevator 500 breaks down.

In this embodiment, the pulse dust collector 100 refers to removing the dust attached to the filter medium (cloth bag or filter cartridge) by blowing compressed air; according to the size of the dust collector 100, there may be several groups of pulse valves 150. Pulse controller or PLC control, each time a group of pulse valves 150 is opened to remove the dust of the part of the bag or filter cartridge it controls, while other bags or filter cartridges work normally, after a period of time, the next group of pulse valves 150 Open, clean up the next part The dust collector 100 is composed of an ash hopper 140, an upper box, a middle box, a lower box, etc., and the upper, middle and lower boxes are divided into chambers 120 structures.

During operation, the dust-laden gas enters the ash hopper 140 from the air inlet, and the coarse dust particles fall directly into the bottom of the ash hopper 140, while the fine dust particles enter the middle and lower boxes upwards with the turning of the airflow, and the dust accumulates on the outer surface of the filter bag and is filtered The final gas enters the upper box to the clean gas collection pipe-exhaust duct, and is exhausted to the atmosphere through the exhaust fan.

The dust cleaning process is to cut off the air outlet duct of the room first, so that the bag in the room is in a state of no air flow (stop the air in the sub-chamber 120 to clear the dust). Then open the pulse valve 150 and use compressed air to carry out pulse jet soot cleaning. The closing time of the cut-off valve is enough to ensure that the dust peeled off from the filter bag after blowing settles to the ash hopper 140, preventing the dust from leaving the surface of the filter bag with the airflow. The phenomenon of attaching to the surface of the adjacent filter bag makes the filter bag clean thoroughly, and the exhaust valve, pulse valve 150 and ash discharge valve 160 are fully automatically controlled by the programmable controller. Dusty gas enters through the air inlet 101, and when passing through the ash hopper 140, part of the large particles of dust in the gas are separated by inertial force and gravity, and fall directly into the bottom of the ash hopper 140. The dust-laden gas enters the filter bag filter area of the middle box after passing through the ash hopper 140. The gas passes through the filter bag, and the dust is blocked on the outer surface of the filter bag. The tuyere 102 is discharged.

Dust collector 100 As the filtration time prolongs, the dust layer on the filter bag continues to accumulate, and the resistance of the dust removal equipment continues to rise. When the resistance of the equipment rises to the set value, the dust removal device starts to clean the dust. Firstly, the poppet valve 130 of a sub-chamber 120 is closed to cut off the filtered air flow, and then the electromagnetic pulse valve 150 is opened, and the compressed air expands rapidly in the upper box in a very short time and pours into the filter bag, causing the filter bag to expand and deform to vibrate, and Under the action of the reverse air flow, the dust attached to the outer surface of the filter bag is stripped and falls into the ash hopper 140 . After cleaning, the electromagnetic pulse valve 150 is closed, the poppet valve 130 is opened, and the chamber returns to the filtering state. The cleaning rooms are carried out sequentially, from the first cleaning room to the next cleaning cycle is a cleaning cycle. The dust that is intercepted after filtering and cleaning falls into the ash hopper 140, and then is concentratedly discharged by the ash unloading device at the mouth of the ash hopper 140.

In the stage of starting two rounds of pulse injection, for the pulse bag filter fault inspection system equipped with equipment such as cloth bag, poppet valve 130, pulse valve 150, etc., if any one component fails alone, or multiple components fail at the same time, it will cause The concentration signal detected by the concentration detector 301 at the outlet of the exhaust device 300 exceeds a preset concentration range. In order to accurately and efficiently locate the location of the faulty sub-chamber 120 and the faulty object, this application provides a pulse bag filter fault inspection method. Specifically, this method can be implemented according to the following steps in specific use:

The smoke and dust emission concentration at the end of the system is abnormally high, that is, the concentration signal detected by the concentration detector 301 at the outlet of the exhaust device 300 exceeds the preset concentration range, and two rounds of sub-chamber (ie chamber) pulse injection are immediately started.

First, the poppet valve 130 of the current compartment 120 is closed.

After the poppet valve 130 is normally closed, the sub-chamber 120 is offline, and the differential pressure should be zero or close to zero. If the differential pressure value is still maintained at the state before the poppet valve 130 is closed, and the close limit signal is not received, That is to say, the poppet valve 130 is not closed, and the poppet valve 130 fails to move properly after the signal is given, and it can be judged that the poppet valve 130 is faulty.

When the dust collector 100 is running normally, the poppet valves 130 are all open. At this time, the cloth bag in the sub-chamber 120 is normally filtered, and there will be a certain resistance value. If the poppet valve 130 is closed, the differential pressure value is still in the state before it is closed or close to The state before closing, that is, the value is considered to be higher.

In this embodiment, the poppet valve 130 is provided with a position detection member 131, and the poppet valve 130 has a first position for opening the first end of the sub-chamber 120 and a second position for closing the first end of the sub-chamber 120. Two positions, the position detecting member 131 is used to detect whether the poppet valve 130 reaches the first position and/or the second position. The poppet valve 130 will have a signal to open to the limit and close to the limit, and there will be signal feedback when it is fully opened and closed. If the differential pressure value of the detection chamber 120 is high and the limit signal of the poppet valve 130 closed state is not received, and the same situation occurs in the two rounds of injection, it is considered that the poppet valve 130 in this chamber is faulty, and manual positioning is required to check the poppet valve 130 in this chamber. Repair or replace promptly.

If the differential pressure value of the detection sub-chamber 120 is close to zero and the limit signal of the closed state of the poppet valve 130 is received, the pulse valve 150 is started to spray sequentially. If the air bag pressure detection shows normal and regular fluctuations, and the situation after two rounds of injection Similarly, it is considered that the pulse valve 150 has no problem. If the pressure of the gas bag decreases compared with the normal value, and remains stable, but still cannot return to the normal value, it can be judged that there is a pulse valve 150 fault in the gas bag, start manual positioning to check the pulse valve 150 of the gas bag, and repair or replace it in time .

If the normal fluctuation of the air bag pressure is detected, the injection task is completed, and the poppet valve 130 is opened. At this time, if the concentration of flue gas and dust at the end of the system increases instantaneously, and the differential pressure value of the sub-chamber 120 increases, the same situation occurs in the two rounds of detection. Next, start manual positioning to check the bag, and focus on checking the dust accumulation of the bag.

If the dust concentration rises instantaneously, and the differential pressure value of compartment 120 is basically normal, it can be judged that the dust accumulation in the bag is serious. Or, the discharge concentration still rises, but the differential pressure of the sub-chamber 120 remains unchanged or decreases, indicating that the filter bag is dropped or burned. At this time, the resistance is low, but the filter area is reduced, which causes the discharge to rise. It should focus on checking the bags for falling off and burning. If there is no significant change in the discharge concentration and the differential pressure is normal, it means it has been normal.

At this time, manual positioning is required to focus on checking the bag falling off and thread opening. If the concentration at the detection outlet remains unchanged and the differential pressure of the compartment 120 is normal, the off-line injection task is ended.

After the off-line blowing task is over, start the ash unloading task, start the bucket elevator 500 (if any) and the scraper machine 400 in sequence, and start manual inspection of the bucket elevator 500 ( If any), scraper machine 400 faults, repair in time. Start the ash unloading valves 160 in sequence again, if the motor current and speed signal of any ash unloading valve 160 are not received, start manual inspection of the ash unloading valves 160.

On the whole, based on the pulse bag filter fault inspection system, after implementing the pulse bag filter fault inspection method, the fault point can be locked in the shortest time to buy time for maintenance; at the same time, intelligent inspection can be realized, labor costs can be reduced, and management can be improved. efficiency.

Any numerical value cited herein includes all values from the lower value to the upper value in increments of one unit for the lower and upper values, with a separation of at least two units between any lower value and any higher value That's it. For example, if it is stated that a component quantity or process variable (such as temperature, pressure, time, etc.) has a value from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose Values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are also explicitly listed in the specification. For values less than 1, one unit is considered to be 0.0001, 0.001, 0.01, 0.1, as appropriate. These are merely examples intended to be expressly stated, and it is considered that all possible combinations of numerical values recited between the lowest value and the highest value are expressly set forth in this specification in a similar manner.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", inclusive of at least the indicated endpoints.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of" describing a combination shall include the identified elements, ingredients, parts or steps as well as other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. Use of the terms "comprising" or "comprising" to describe a combination of elements, ingredients, parts or steps herein also contemplates an embodiment that consists essentially of these elements, ingredients, parts or steps. By using the term "may" herein, it is intended that inclusion of "may" in any of the described attributes is optional.

Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step may be divided into separate plural elements, ingredients, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not meant to exclude other elements, ingredients, components or steps.

It should be understood that the foregoing description is for purposes of illustration and not limitation. Many implementations and many applications other than the examples provided will be apparent to those of skill in the art from reading the above description. The scope of the present teachings, therefore, should be determined not with reference to the above description, but should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for completeness. The omission from the preceding claims of any aspect of the subject matter disclosed herein is not intended to be a disclaimer of such subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Each implementation in this specification is described in a progressive manner, each implementation focuses on the differences from other implementations, and the same and similar parts of each implementation can be referred to each other.

The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention. The purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly, and not to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (18)

1. A pulse bag filter fault inspection system, characterized in that it includes: Dust collector, the dust collector has a hollow upper box, a middle box and an ash hopper, a plurality of relatively independent sub-chambers are arranged in the middle box, and relative air inlets and Each of the sub-chambers is provided with an opposite first end and a second end, each of the sub-chambers is provided with a cloth bag, a poppet valve is provided near the first end, and an inlet valve is provided near the second end. Air valve, the upper box is provided with a pulse valve, the outlet of the ash hopper is provided with an ash unloading valve, and between the first end and the second end is provided for obtaining the chamber pressure. Poor first detection component; An exhaust device connected to the air outlet, the outlet of the exhaust device is provided with a concentration detection piece; A controller is at least electrically connected to the first detection component and the concentration detection piece. 2. The fault inspection system of the pulse bag filter according to claim 1, wherein the fault inspection system of the pulse bag filter further comprises: a device for obtaining the pressure difference between the air inlet and the air outlet A second detection component, the second detection component is electrically connected to the controller. 3. The pulse bag filter fault inspection system according to claim 1, wherein the poppet valve is provided with a position detection member, and the poppet valve has a first position for opening the first end of the sub-chamber and a second position for closing the first end of the sub-chamber, and the position detecting member is used for detecting whether the poppet valve reaches the first position and/or the second position. 4. The pulse bag filter fault inspection system according to claim 1, wherein the dust discharge valve is provided with a first motor, and the pulse bag filter fault inspection system further includes: for obtaining the A first current detection part for the first motor current and a first speed detection part for the first motor speed, the first current detection part and the first speed detection part are electrically connected to the controller . 5. The pulse bag filter fault inspection system according to claim 4, characterized in that, the pulse bag filter fault inspection system further comprises: a scraper machine arranged downstream of the dust discharge valve, the The scraper machine is provided with a second motor, and the fault inspection system for the pulse bag filter further includes: a second current detection element for obtaining the current of the second motor and a second rotational speed for the rotational speed of the second motor The detection part, the second current detection part and the second rotational speed detection part are electrically connected to the controller. 6. The pulse bag filter fault inspection system according to claim 5, characterized in that, the pulse bag filter fault inspection system further comprises: a bucket elevator arranged downstream of the scraper machine, the The bucket elevator is provided with a third motor, and the fault inspection system for the pulse bag filter also includes: a third current detection element for obtaining the current of the third motor and a third rotational speed for the rotational speed of the third motor The detection part, the third current detection part and the third rotational speed detection part are electrically connected to the controller. 7. The pulse bag filter fault inspection system according to claim 1, characterized in that, the pulse bag filter fault inspection system further comprises: a cleaning component connected with the pulse valve, the cleaning The ash component includes: a blowing pipe, an air bag, and a pulse controller for controlling the working state of the pulse valve, and the pulse controller is electrically connected with the controller. 8. The pulse bag filter fault inspection system according to claim 7, characterized in that, the pulse bag filter fault inspection system further comprises: a third detection component for obtaining the air bag pressure, the The third detection component is electrically connected with the controller. 9. The pulse bag filter fault inspection system according to any one of claims 1 to 8, wherein a dust removal fan is arranged between the exhaust device and the air outlet. 10. The pulse bag filter fault inspection system according to claim 9, wherein a muffler is arranged between the exhaust device and the dust removal fan. 11. A pulse bag filter fault inspection method for a pulse bag filter fault inspection system, characterized in that the pulse bag filter fault inspection system includes: a dust collector, the dust collector has a hollow upper box Body, middle box and ash hopper, a plurality of relatively independent sub-chambers are arranged in the middle box, relative air inlets and air outlets are arranged on both sides of the middle box, and each of the sub-chambers is provided with a relative The first end and the second end, each of the sub-chambers is provided with a cloth bag, a poppet valve is provided near the first end, the poppet valve is provided with a position detection piece, and an air inlet valve is provided near the second end , the upper box is provided with a pulse valve, the outlet of the ash hopper is provided with an ash unloading valve, and a valve for obtaining the pressure difference between the compartments is provided between the first end and the second end The first detection assembly; the exhaust device connected with the air outlet, the outlet of the exhaust device is provided with a concentration detection piece; the ash removal assembly connected with the pulse valve, the ash removal assembly includes : blowing pipe, air bag, pulse controller for controlling the working state of the pulse valve, and the third detection assembly for obtaining the pressure of the air bag; controller, at least with the first detection assembly, the The concentration detection part, the position detection part of the lift valve, the pulse controller, and the third detection component are electrically connected; the fault inspection method of the pulse bag filter includes: When the concentration signal detected by the concentration detection part at the outlet of the exhaust device exceeds the preset concentration range, at least two rounds of pulse injection are performed on each sub-chamber, using the first detection component, the position detection part, the second The detected signals of the three detection components identify the location of the currently faulty compartment and the faulty object, and the faulty object includes any one or a combination of the following: cloth bags, poppet valves and pulse valves in the compartment . 12. The pulse bag filter fault inspection method according to claim 11, characterized in that, when the concentration signal detected by the concentration detector at the outlet of the exhaust device exceeds the preset concentration range, the method Including: closing the poppet valve of the current compartment. If the pressure difference value of the current compartment is greater than the first differential pressure and the closing limit signal of the poppet valve of the current compartment is not received, it means that the poppet valve of the current compartment is faulty. 13. The pulse bag filter fault inspection method according to claim 12, characterized in that, after closing the poppet valve of the current compartment, if the pressure difference value of the current compartment is less than the second differential pressure and the poppet valve of the current compartment is received The closing limit signal indicates that the poppet valve of the current sub-chamber is in a normal state, and the second pressure difference is smaller than the first pressure difference, Start the pulse valve for injection. If the air bag pressure drops and cannot return to the preset pressure range, it means that the pulse valve of the current sub-chamber is faulty. 14. The pulse bag filter fault inspection method according to claim 13, characterized in that, after the pulse valve is activated for blowing, if the pressure of the air bag is within the preset pressure range, it means that the pulse valve of the current sub-chamber is in normal condition. state; Open the poppet valve, if the concentration signal detected by the concentration detector at the outlet of the exhaust device exceeds the preset concentration range, and the current differential pressure value of the chamber increases, if the same situation occurs in the two rounds of detection, identify Out of the current compartment bag failure. 15. The pulse bag filter fault inspection method according to claim 14, wherein the dust discharge valve is provided with a first motor, and the pulse bag filter fault inspection system further includes: for obtaining the The first current detection part of the first motor current and the first speed detection part for the first motor speed; the scraper machine arranged downstream of the dust discharge valve, the scraper machine is provided with a second motor , the second current detection part for obtaining the second motor current and the second speed detection part for the second motor speed, the first current detection part, the first speed detection part, the The second current detection part and the second rotational speed detection part are electrically connected to the controller. After the injection process is completed, the fault inspection method of the pulse bag filter also includes starting the ash unloading process. 16. The pulse bag filter fault inspection method according to claim 15, characterized in that, in the process of starting the ash unloading process, first start the scraper machine, if the second motor is not received The current signal and speed signal indicate that the scraper machine is faulty. 17. The pulse bag filter fault inspection method according to claim 16, characterized in that, after starting the scraper machine, if the current signal and the speed signal of the second motor are received, it means that the current scraper If the motor is in normal working condition, start the ash discharge valves sequentially. If the current signal and speed signal of the first motor are not received, it means that the ash discharge valve is faulty. 18. The pulse bag filter fault inspection method according to claim 16, characterized in that, the pulse bag filter fault inspection system further comprises: a bucket elevator arranged downstream of the scraper machine, the The bucket elevator is provided with a third motor, and the fault inspection system for the pulse bag filter also includes: a third current detection element for obtaining the current of the third motor and a third rotational speed for the rotational speed of the third motor a detection part, the third current detection part and the third rotational speed detection part are electrically connected to the controller, When starting the scraper conveyor, it also includes starting the bucket elevator. If the current signal and the speed signal of the third motor are not received, it means that the bucket elevator is out of order.

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