CN111841176A - A dust collector - Google Patents

Abstract

The invention discloses a dedusting ash recovery device. The device comprises a bag type dust collector, a chain conveyor, a buffering dust collecting bin, a Roots blower, a blowing pump, a dust bin and a screw conveyor; the lower part of the bag type dust collector is connected with the buffering dust collecting bin through a chain conveyor; the lower part of the buffering ash collecting bin is connected with the ash bin through a blowing system consisting of a Roots blower and a blowing pump, and the screw conveyer is fixed at the bottom of the ash bin. The invention has the advantages of simple structure, convenient operation and management, low labor intensity, low investment and maintenance cost, easy realization of automatic control, effective avoidance of secondary dust pollution, strong practicability and high economic benefit.

Description

A dust collector

technical field

The invention relates to a dedusting ash recovery device, in particular to a centralized recovery device for dry dedusting ash collected in ferroalloy industrial production.

Background technique

In the industrial production process of ferroalloy, a large amount of flue gas will be generated. The toxic and harmful dust contained in the flue gas must be purified by the dust removal system and then discharged to the atmosphere according to the environmental protection requirements. Since the dust collectors are installed on the production line more and are usually scattered, the dust collected by the dust removal system usually needs to be manually released to the truck or trolley and then transported to the designated location. Serious threats to health and the natural environment. On the other hand, the transport and centralized collection of dust removal requires many personnel, and the labor intensity of the workers is high.

In order to solve the above problems, the present invention develops a ferroalloy dust collection device that can avoid secondary dust and reduce labor intensity of workers, and is simple, practical and low-cost at the same time.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a dust recovery device.

The present invention is achieved through the following technical solutions:

A dedusting and ash recycling device, comprising a bag filter, a chain conveyor, a buffer ash collection bin, a Roots blower, a jet pump, an ash bin, and a screw conveyor;

The bottom of the bag filter is connected with the buffer ash collection bin through a chain conveyor;

The bottom of the buffer ash collecting bin is connected to the ash bin through a blowing system composed of a Roots blower and a jet pump, and the screw conveyor is fixed at the bottom of the ash bin.

Further, the bottom of the bag filter is provided with a ash discharge valve. When the bag filter collects a certain amount of dust, the ash discharge valve is opened, and the ash discharge valve is intermittently and sequentially discharged. The ash collected by the dust collector enters the chain conveyor and is transported to the bottom buffer ash collection bin.

The upper part of the buffer ash collecting bin is equipped with a capacitive material level gauge, and the bottom is provided with an airtight ash discharge valve. When the signal is full, the air-tight ash discharge valve under the buffer ash collection bin will be opened to discharge.

A silo top dust collector is installed above the ash silo, and the dust collected by the bag filter is blown into the dust hopper of the precipitator by the compressed air pulse jet of the silo top dust collector.

The blowing pump and the ash silo are communicated through an ash conveying pipeline, wherein the end of the ash conveying pipeline close to the blowing pump is a steady-flow straight pipe, that is, an ash conveying pipeline is connected between the blowing system and the ash silo. The ash pipeline is equipped with a straight pipe near the end of the injection system to achieve the effect of steady flow, which is an important part to enable the ash-laden gas to flow into the ash conveying pipeline stably without backflow.

The blowing pump is composed of a casing, a nozzle, and a nozzle adjustment mechanism, wherein the nozzle adjustment mechanism is an adjustment pipe provided with an internal thread, the air inlet end of the nozzle is an external thread cylindrical structure, and the air outlet end It is a conical structure, the air inlet end of the nozzle is connected with the nozzle adjustment mechanism through a threaded structure, and the air outlet end of the nozzle is fixed in the casing; the nozzle adjustment mechanism adjusts the front and rear positions of the nozzle by adjusting the length of the inner and outer threads, thereby adjusting the material characteristics of the system. , and then adjust the spray effect.

The length ratio of the external thread cylindrical structure of the nozzle to the conical structure is 3:4, and the preferred solution is that the air inlet side of the nozzle conical structure is Φ46, the air outlet side is Φ38, the steady flow straight pipe is Φ125, and the length is 1.2 meters. ; Or the preferred solution is that the air inlet side of the nozzle conical structure is Φ52, the air outlet side is Φ48, and the steady flow straight pipe is Φ150 and 1.5 meters long; the nozzle is the generating element of the spray jet, which ensures that the spray system has The key to excellent strip characteristics and dynamic performance has a great impact on the injection effect. The design of the nozzle structure, the diameter and length of the steady flow section, and the diameter of the ash conveying pipeline are the key to the formation of negative pressure in the injection system and the smooth strip injection. The parameters of the above components comprehensively consider the air volume of the Roots fan, the particle size of the ash, the moisture content and other factors to achieve the best conveying speed of the material.

The device of the invention is suitable for the recovery of dust removal dust with a diameter of less than 1 mm and a free water content of about 5%. The operation process consists of four stages: (1) Collection stage: the dust removal dust collected by the bag filter is pulsed by compressed air. It falls into the ash hopper of the dust collector, and is discharged intermittently and sequentially through the ash discharge valve, and then enters the chain conveyor and is transported to the bottom buffer ash collection bin; (2) Unloading stage: when the ash level in the buffer ash collection bin rises and touches the After the material level device, the material level device sends out a material full signal, and the air-tight ash discharge valve under the buffer ash collection bin opens to discharge the material; (3) Blowing fluidization stage: Before the spraying system works, adjust the position of the nozzle. The wind speed at the outlet is designed to be high, and a negative pressure area is formed at the ash inlet, so as to ensure that the airtight ash discharge valve can smoothly discharge the dust into the injection system, and in the process of buffering the ash level of the ash collection bin, the injection The dust removal ash in the system is always in a state of fluidization and transportation; (4) Conveying and utilization stage: the dust removal ash enters the ash bin through the steady flow section and the ash conveying pipeline, and enters the ash bin after being dedusted and exhausted by the dust collector on the top of the bin. In the screw conveyor at the bottom of the silo, it is finally transported to the raw material humidification mixer to participate in a new round of batching production; in addition, for the dust that can be directly sold, and the terrain and other conditions permit, the powder tanker can also be used instead of the ash silo , use this system to transport the dust to the powder tanker and directly pull it away for sale.

Compared with the prior art, the present invention has the following advantages:

(1) Simple structure, few mechanical transmission parts, convenient operation and management, and low labor intensity;

(2) The investment and maintenance costs are low, and the conveying line is arranged flexibly. According to the actual situation, one or more groups of injection system combinations can be selected, which can be distributed to different areas, or can be concentrated from several different places to one place;

(3) Good aerodynamic performance, easy to realize automatic control, and can continuously monitor the operation of the system, including pressure, delivery volume, etc.;

(4) It can effectively avoid secondary dust pollution, with strong practicability and high economic benefits.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the schematic diagram of the connection structure of the injection pump of the present invention and the ash conveying pipeline;

3 is a schematic diagram of Embodiment 1 of the present invention;

In the picture: 1-bag type dust collector, 22-ash discharge valve, 3-chain conveyor, 4-buffer ash collection bin, 5-capacitive material level gauge, 6-airtight ash discharge valve, 7-luo Fan, 8-jet pump, 9-silo top dust collector, 10-ash silo, 11-screw conveyor, 12-ash conveying pipeline, 13-steady flow straight pipe, 14-wet mixer, 81-shell , 82-nozzle, 83-nozzle adjustment mechanism.

Detailed ways

The present invention will be further described below with reference to specific embodiments, but it should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Various changes or modifications made to the present invention by those skilled in the art on the basis of the present invention should also fall within the protection scope of the present invention.

As shown in Fig. 1, a dust removal and ash recovery device includes a bag filter 1, a chain conveyor 3, a buffer ash collecting bin 4, a Roots blower 7, a jet pump 8, an ash bin 10, a screw Conveyor 11; the lower part of the bag filter 1 is connected to the buffer ash collecting bin 4 through the chain conveyor 3; The ash bin 10 is connected, and the screw conveyor 11 is fixed at the bottom of the ash bin 10 .

The bottom of the bag filter 1 is provided with an ash discharge valve 2, which is connected to the chain conveyor 3 through the ash discharge valve 2 to discharge the bag filter 1 intermittently; The dust collector 9 on the top of the warehouse and the capacitive material level gauge 5 are provided with an air-tight ash discharge valve 6 at the bottom. When the ash level rises and touches the capacitive material level gauge, the dust collector 9 on the top of the warehouse and the air-tight dust discharge valve 6 are opened to discharge the material. .

The blowing pump 8 and the ash bin 10 are communicated through the ash conveying pipeline 12, wherein the end of the ash conveying pipeline 12 close to the blowing pump 8 is a cylindrical steady-flow straight pipe 13, which achieves the effect of steady flow and ensures that the ash-laden gas can Stable flow into the ash pipeline without backflow.

The blowing pump 8 shown in FIG. 2 is composed of a casing 81 , a nozzle 82 and a nozzle adjusting mechanism 83 , wherein the nozzle adjusting mechanism 83 is an adjusting pipe provided with internal threads, and the air inlet end of the nozzle 82 is The external thread cylindrical structure, the air outlet end is a conical structure, the air inlet end of the nozzle 82 is connected with the nozzle adjustment mechanism 83 through the threaded structure, and the air outlet end of the nozzle 82 is fixed in the casing 81. During operation, the length of the internal and external threads can be adjusted by adjusting Thereby, the purpose of adjusting the front and rear positions of the nozzle 82 is achieved. In the specific design, the length ratio of the external thread cylindrical structure of the nozzle 82 and the conical structure is 3:4, and the air inlet side of the conical structure of the nozzle 82 is Φ46, and the air outlet is one. The side is Φ38, the steady flow straight pipe is Φ125, and the length is 1.2 meters.

As shown in Figure 3, the device is arranged in the kiln tail flue gas treatment system of a rotary kiln in a ferronickel factory. The dust-laden flue gas of the rotary kiln is collected by a bag filter to collect the ferronickel dust and sent to the ash collection bin. The system sends the dust to the raw material processing plant, and the raw materials can be reused after being humidified and stirred by the wet mixer 14.

Example 2

As shown in Fig. 1, a dust removal and ash recovery device includes a bag filter 1, a chain conveyor 3, a buffer ash collecting bin 4, a Roots blower 7, a jet pump 8, an ash bin 10, a screw Conveyor 11; the lower part of the bag filter 1 is connected to the buffer ash collecting bin 4 through the chain conveyor 3; The ash bin 10 is connected, and the screw conveyor 11 is fixed at the bottom of the ash bin 10 .

The bottom of the bag filter 1 is provided with an ash discharge valve 2, which is connected to the chain conveyor 3 through the ash discharge valve 2 to discharge the bag filter 1 intermittently; The dust collector 9 on the top of the warehouse and the capacitive material level gauge 5 are provided with an air-tight ash discharge valve 6 at the bottom. When the ash level rises and touches the capacitive material level gauge, the dust collector 9 on the top of the warehouse and the air-tight dust discharge valve 6 are opened to discharge the material. .

The blowing pump 8 and the ash bin 10 are communicated through the ash conveying pipeline 12, wherein the end of the ash conveying pipeline 12 close to the blowing pump 8 is a cylindrical steady-flow straight pipe 13, which achieves the effect of steady flow and ensures that the ash-laden gas can Stable flow into the ash pipeline without backflow.

The blowing pump 8 shown in FIG. 2 is composed of a casing 81 , a nozzle 82 and a nozzle adjusting mechanism 83 , wherein the nozzle adjusting mechanism 83 is an adjusting pipe provided with internal threads, and the air inlet end of the nozzle 82 is The external thread cylindrical structure, the air outlet end is a conical structure, the air inlet end of the nozzle 82 is connected with the nozzle adjustment mechanism 83 through the threaded structure, and the air outlet end of the nozzle 82 is fixed in the casing 81. During operation, the length of the internal and external threads can be adjusted by adjusting Thereby, the purpose of adjusting the front and rear positions of the nozzle 82 is achieved. In the specific design, the length ratio of the external thread cylindrical structure of the nozzle 82 and the conical structure is 3:4, and the air inlet side of the conical structure of the nozzle 82 is Φ52, and the air outlet is Φ52. The side is Φ48, the steady flow straight pipe is Φ150, and the length is 1.5 meters.

The device is arranged in an industrial silicon electric furnace flue gas treatment system. The bag filter collects the silicon powder in the industrial silicon flue gas and sends it to the ash collection bin. The nearby refractory material factory is used for batching utilization.

Claims (10)

1. A dedusting and ash recovery device, comprising a bag filter, and characterized in that it also comprises a chain conveyor, a buffer ash collection bin, a Roots blower, a jet pump, an ash bin, and a screw conveyor; The bottom of the bag filter is connected with the buffer ash collection bin through a chain conveyor; The bottom of the buffer ash collecting bin is connected to the ash bin through a blowing system composed of a Roots blower and a jet pump, and the screw conveyor is fixed at the bottom of the ash bin. 2 . The dust recovery device according to claim 1 , wherein a dust discharge valve is provided at the bottom of the bag filter. 3 . 3 . The dust removal and ash recovery device according to claim 1 or 2 , wherein a capacitive material level gauge is installed above the buffer ash collecting bin. 4 . 4 . The dust removal and ash recovery device according to claim 1 or 2 , wherein the bottom of the buffer ash collecting bin is provided with an air-tight ash discharge valve. 5 . 5 . The dust removal and ash recovery device according to claim 1 or 2 , wherein a silo top dust collector is installed above the ash silo. 6 . 6. A dedusting and ash recovery device according to claim 1 or 2, characterized in that, the jet pump and the ash bin are communicated through an ash conveying pipeline, wherein one end of the ash conveying pipeline close to the injection pump is Steady flow straight pipe. 7. A dust collector according to claim 1 or 2, wherein the blowing pump is composed of a casing, a nozzle, and a nozzle adjusting mechanism, wherein the nozzle adjusting mechanism is provided with an internal A threaded adjustment pipe, the air inlet end of the nozzle is a cylindrical structure with external thread, the air outlet end is a conical structure, the air inlet end of the nozzle is connected with the nozzle adjustment mechanism through the threaded structure, and the air outlet end of the nozzle is fixed on the casing. 8 . The dust collector according to claim 7 , wherein the length ratio of the cylindrical structure of the external thread to the conical structure of the nozzle is 3:4. 9 . 9 . The dust collector according to claim 7 , wherein the air inlet side of the nozzle cone structure is Φ46 and the air outlet side is Φ38 . 10 . The dust collector according to claim 7 , wherein the air inlet side of the nozzle cone structure is Φ52, and the air outlet side is Φ48. 11 .

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