CN111701409A - Discharge equipment, exhaust gas purification treatment system and purification treatment method thereof - Google Patents

Abstract

The invention belongs to the technical field of exhaust gas purification treatment, and in particular relates to discharge equipment, a tail gas purification treatment system and a purification treatment method thereof, wherein the discharge equipment comprises: a plurality of electrode plate groups, and the electrode plate group includes: a plurality of positive electrode plates and a plurality of Negative electrode plates; each positive electrode plate and each negative electrode plate are arranged in parallel and evenly staggered; and the air flow channel formed by the gap between adjacent positive and negative electrode plates; the discharge device, the exhaust gas purification treatment system and the purification thereof of the present invention The treatment method ensures a sufficient discharge area through the positive and negative electrode plates in the shape of a plate, and generates a high-density low-temperature plasma in a sufficient discharge area by setting an effective discharge gap, which ensures the comprehensive reaction with the VOCs in the exhaust gas. A sufficient amount of plasma is required, thereby obtaining a higher exhaust gas treatment efficiency; at the same time, the space size of the discharge equipment can be reduced and the input cost of the discharge equipment can be reduced through the positive and negative electrode plates in the shape of a plate.

Description

Discharge equipment, exhaust gas purification treatment system and purification treatment method thereof

technical field

The invention belongs to the technical field of exhaust gas purification and treatment, and in particular relates to a discharge device, a tail gas purification treatment system and a purification treatment method thereof.

Background technique

NTP refers to low-temperature plasma technology. Low-temperature plasma is the fourth state after solid, liquid, and gas three-state matter. It is composed of positive ions, negative ions, electrons and neutral particles. In this system, the number of positive and negative charges is the same. , so it is called plasma, and the application of low temperature plasma technology is low temperature plasma technology. The existing methods for purifying exhaust gas using NTP technology mainly include: jet injection discharge technology and direct contact discharge technology.

Among them, the jet injection discharge technology is to set up an NTP plasma field beside the exhaust gas discharge pipe. The plasma field generates plasma under high pressure, and the plasma is injected into the exhaust gas discharge pipe by means of jets. Sexual organic compounds) carry out a variety of reactions to purify the exhaust gas, but there are the following problems:

1) The half-life of ROS (reactive oxygen species) in the plasma field is short, ranging from about 100ms to several minutes. During the process of ROS injection into the exhaust pipe (much longer than its half-life), a physical or chemical reaction has occurred, thereby Reduced the oxidative properties of ROS;

2) The ROS generated by the injection reaction does not match the number of VOCs to be treated in the exhaust pipe. Without changing the existing process parameters, the ROS generated by the injection reaction is usually only 1/10 of the number of VOCs to be treated. As a result, the processing capacity of the equipment is insufficient, and most of the VOCs are discharged into the atmosphere without being processed.

3) Jet injection type Because the positive electrode cannot be completely sealed, only the jet injection type can be used, so that the exhaust gas will not be in direct contact with the electrode.

Among them, the electrode of the direct contact discharge technology is a needle-type tubular electrode. When a high voltage is applied, a plasma field is formed between the positive electrode and the negative electrode and plasma is generated. When the exhaust gas to be treated passes through the plasma field, the VOCs in the exhaust gas and the plasma field The ROS in the exhaust gas undergoes various reactions to purify the exhaust gas, but there are the following problems:

1) If the needle-type tubular electrode is to generate the same amount of ROS as the plate-type electrode, the number and size of the electrodes will be relatively large, resulting in an increase in the overall size of the device, a huge footprint, and high investment costs;

2) The needle tubular electrode has poor stability, short life, high frequency of electrode replacement, high maintenance cost, and high equipment operation cost in the later stage.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a discharge device, an exhaust gas purification treatment system and a purification treatment method thereof.

In order to solve the above technical problems, the present invention provides a discharge device, comprising: a plurality of electrode plate groups, and the electrode plate group includes: a plurality of positive electrode plates and a plurality of negative electrode plates; each positive electrode plate and each negative electrode plate are parallel And evenly staggered; and the gap between the adjacent positive and negative electrode plates forms an air flow channel.

Further, the width of the airflow channel is 3-5mm.

Further, the positive electrode plate includes: a first rectangular portion; the negative electrode plate includes: a second rectangular portion; and the area of the second rectangular portion is not smaller than the area of the first rectangular portion.

Further, the positive electrode plate includes: a conductor, a silicone plate attached to the surface of the conductor, and an insulating material coated on the outside of the silicone plate.

In another aspect, the present invention also provides an exhaust gas purification treatment system, including: a control cabinet, a transformer cabinet and an electrode cabinet; wherein the electrode cabinet is provided with the aforementioned discharge equipment; the control cabinet is suitable for controlling the transformer The cabinet outputs the power supply voltage required by the discharge device; and the discharge device is suitable for processing the exhaust gas entering the electrode cabinet.

Further, the exhaust gas purification and treatment system further includes: a high temperature and high humidity dust collector; the high temperature and high humidity dust collector is suitable for pretreatment of the exhaust gas entering the electrode cabinet.

Further, the exhaust gas purification and treatment system further includes: a current monitoring module; the current monitoring module is adapted to collect current signals of each electrode plate group and send them to the control cabinet; and the control cabinet is adapted to generate current signals when the current signals are generated. When abnormal, disconnect the power supply of the transformer and send out an alarm signal.

Further, the exhaust gas purification and treatment system further includes: a power supply monitoring module; the power supply monitoring module is adapted to collect parameter information of the power supply signal output by the transformer cabinet and send it to the control cabinet; and the control cabinet is adapted to display the power supply The parameter information of the signal, and when the parameter information of the power signal is abnormal, the power supply of the transformer is disconnected, and an alarm signal is issued.

Further, the exhaust gas purification and treatment system further includes: an ozone monitoring module; the ozone monitoring module is adapted to collect the ozone content of the treated exhaust gas and send it to the control cabinet; and the control cabinet is adapted to control the transformer according to the ozone content The cabinet adjusts the output power voltage.

In a third aspect, the present invention also provides a method for purifying exhaust gas, comprising: controlling a transformer cabinet through a control cabinet to output a power supply voltage required by a discharge device located in the electrode cabinet; deal with.

The beneficial effect of the present invention is that the discharge equipment, the exhaust gas purification treatment system and the purification treatment method thereof of the present invention ensure sufficient discharge area through the positive and negative electrode plates in the shape of a plate, and by setting an effective discharge gap, achieve sufficient discharge area. The high-density low-temperature plasma generated by the large discharge area ensures the sufficient amount of plasma required for the comprehensive reaction with VOCs in the exhaust gas, thereby obtaining a high exhaust gas treatment efficiency; at the same time, the plate-shaped positive and negative electrode plates can reduce The space size of the discharge equipment is small, and the input cost of the discharge equipment is reduced.

Other features and advantages of the present invention will be set forth in the description which follows, and parts of the structure will become apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the description, claims and drawings.

In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, preferred embodiments are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic structural diagram of a discharge device of the present invention;

Fig. 2 is the structural representation of the positive electrode plate of the discharge device of the present invention;

Fig. 3 is the structural representation of the negative electrode plate of the discharge device of the present invention;

FIG. 4 is a schematic structural diagram of the exhaust gas purification treatment system of the present invention.

In the picture:

Positive electrode plate 10 , first rectangular portion 11 , negative electrode plate 20 , second rectangular portion 21 , airflow channel 30 , control cabinet 40 , transformer cabinet 50 , electrode cabinet 60 , and ozone monitoring module 70 .

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

As shown in FIG. 1 to FIG. 3 , this embodiment 1 provides a discharge device, including: a plurality of electrode plate groups, and the electrode plate group includes: a plurality of positive electrode plates 10 and a plurality of negative electrode plates 20; each positive electrode plate The plates 10 and the negative electrode plates 20 are arranged in parallel and evenly staggered; and the air flow channel 30 is formed by the gap between the adjacent positive and negative electrode plates, and the width of the air flow channel 30 is 3-5mm.

Specifically, after a high-voltage variable frequency power supply is applied between the positive and negative electrode plates, a discharge electric field is formed between the positive and negative electrode plates (ie, in the airflow channel), and low-temperature plasma (ie, ROS) is generated when the exhaust gas passes through the discharge electric field in the airflow channel. ), using the generated ROS to react with the exhaust gas in the airflow channel, so as to achieve the purpose of purifying the exhaust gas; the discharge device in this embodiment uses the plate-shaped positive and negative electrode plates to ensure sufficient discharge area, and by setting an effective The discharge gap realizes the generation of high-density low-temperature plasma in a sufficient discharge area, ensuring a sufficient amount of plasma required for the comprehensive reaction with VOCs in the exhaust gas, thereby obtaining a high exhaust gas treatment efficiency; The negative electrode plate can reduce the space size of the discharge equipment and reduce the input cost of the discharge equipment.

Specifically, the number of electrode plate groups can be set according to requirements such as the amount of exhaust gas treatment, so that 100% of the exhaust gas to be treated passes through each electrode plate group, thereby ensuring the exhaust gas treatment effect.

In this embodiment, the electrode cabinet adopts a movable drawer structure to ensure fast and convenient maintenance.

In this embodiment, the positive electrode plate 10 includes: a first rectangular portion 11; the negative electrode plate 20 includes: a second rectangular portion 21; and the area of the second rectangular portion 21 is not smaller than the first rectangular portion The size of the area of the part 11.

Specifically, in this embodiment, each positive electrode plate 10 has one negative electrode plate 20 on both sides, so in one electrode plate group, the number of negative electrode plates 20 will be one more than the number of positive electrode plates 10; when When a discharge electric field is formed by energizing between the positive and negative electrode plates, since the area of the second rectangular portion 21 is equal to or slightly larger than that of the first rectangular portion 11, it can be ensured that the area boundary of the discharge electric field does not touch the electrode plate group. components (such as the support frame used to support the electrode plate group, etc.), improve electrical safety.

In this embodiment, the positive electrode plate 10 includes: a conductor, a silicone plate attached to the surface of the conductor, and an insulating material coated on the outside of the silicone plate.

Specifically, the electrical conductor is, for example, but not limited to, a stainless steel plate; the insulating material is, for example, but not limited to, high borosilicate glass; silicone adhesive is used between the silicone plate and the conductor, and between the silicone plate and the insulating material. Adhesive bonding and sealing.

Specifically, the silica gel plate and insulating material are used to ensure that the conductor has good insulating and sealing performance; the insulating and sealing structure of the positive electrode plate ensures that even if there are condensed water and other products in the exhaust gas to be treated, there will be no electrode short circuit, avoiding the occurrence of short circuits. It avoids the occurrence of unstable conditions such as arc discharge, electrode damage and failure, so as to further ensure the effect of exhaust gas treatment.

Specifically, the negative electrode plate 20 has the same conductor as the positive electrode plate 10. In practical applications, the negative electrode plate 20 does not need insulation and sealing protection, but only needs to be insulated and isolated from the electrode cabinet. The isolation method adopts a high dielectric constant ceramic block. The clips are embedded at both ends of the negative electrode plate 20 to form a negative electrode plate bracket, which is placed in the electrode cabinet.

Specifically, isolation and insulation protection are also provided around the electrode cabinet to ensure the safe operation of the entire system.

To sum up, the discharge device of the first embodiment can increase the discharge area through the electrode plates in the shape of a plate, and control the gap between the electrode plates, thereby generating a sufficient amount of low-temperature plasma and improving the exhaust gas treatment efficiency. And the plate-shaped electrode plate can compress the space size of the discharge equipment, reduce the input cost of the discharge equipment, and set the positive electrode plate as an insulating and sealing structure, which improves the stability of the electrode quality and the longevity of the service life, thereby reducing the discharge. Equipment operation and maintenance costs.

Example 2

As shown in FIG. 4 , on the basis of Embodiment 1, Embodiment 2 provides an exhaust gas purification treatment system, including: a control cabinet 40 , a transformer cabinet 50 and an electrode cabinet 60 ; wherein the electrode cabinet 60 is provided with the following The discharge equipment described in Embodiment 1; the control cabinet 40 is suitable for controlling the transformer cabinet 50 to output the power supply voltage required by the discharge equipment; and the discharge equipment is suitable for processing the exhaust gas entering the electrode cabinet.

Specifically, the control cabinet 40 is, for example, but not limited to, a PLC control cabinet.

Specifically, the electrode cabinet 60 is provided with a rectangular frame suitable for carrying each electrode plate group. The rectangular frame is, for example, but not limited to, mica sheets or similar insulating materials with a certain hardness. When dealing with warm and humid exhaust gas, there will be no short circuit due to the certain moisture content of the exhaust gas.

Specifically, in this embodiment, the working voltage of the electrode cabinet 60 is 4,000 to 100,000 volts, and the frequency covers the alternating current of 50 Hz to 50,000 Hz.

In this embodiment, the exhaust gas purification and treatment system further includes: a high-temperature and high-humidity dust collector (not shown in the figure); the high-temperature and high-humidity dust collector is suitable for pre-processing the exhaust gas entering the electrode cabinet 60 .

Specifically, the high-temperature and high-humidity dust collector is used to remove the dust in the exhaust gas, which prevents the dust from condensing on the electrode plate after the exhaust gas enters the electrode cabinet, and the partial discharge leads to a short circuit of the high-voltage power supply, resulting in serious system shutdown and high operation and maintenance. question of cost.

In this embodiment, the exhaust gas purification and treatment system further includes: a current monitoring module; the current monitoring module is adapted to collect current signals of each electrode plate group and send them to the control cabinet 40 ; and the control cabinet 40 It is suitable for disconnecting the power supply of the transformer in the transformer cabinet 50 and issuing an alarm signal when the current signal is abnormal.

Specifically, by monitoring the current signal of each electrode plate group, the fault of the electrode plate can be found in time.

In this embodiment, the exhaust gas purification and treatment system further includes: a power monitoring module; the power monitoring module is adapted to collect parameter information of the power signal output by the transformer cabinet 50 and send it to the control cabinet 40; The control cabinet 40 is suitable for displaying the parameter information of the power signal, and when the parameter information of the power signal is abnormal, the power supply of the transformer is disconnected, and an alarm signal is issued.

Specifically, the control cabinet 40 is suitable for displaying the parameter information of the power signal on a remote monitoring terminal; the parameter information of the power signal includes, but is not limited to, frequency, duty cycle, bus output voltage, current, operating status, etc. ; Through the power monitoring module, it is convenient for the remote monitoring terminal to know the parameter information of the power signal in time, so as to realize the remote control of the transformer cabinet, and the power supply failure of the transformer cabinet 50 can also be found in time.

In this embodiment, the exhaust gas purification and treatment system further includes: an ozone monitoring module 70; the ozone monitoring module 70 is adapted to collect the ozone content of the treated exhaust gas and send it to the control cabinet 40; and the control The cabinet 40 is adapted to control the transformer cabinet 50 to adjust the output power voltage according to the ozone content.

Specifically, by monitoring the ozone content of the treated exhaust gas by the ozone monitoring module 70, it is convenient for the transformer cabinet 50 to adjust the output power voltage in time and ensure the efficient and energy-saving operation of the system.

To sum up, the exhaust gas purification and treatment system of the second embodiment can efficiently process the exhaust gas, and during the treatment process, abnormal conditions can be detected in time through each monitoring module, and the system operation requirements can be adjusted in time, so as to ensure the efficient and stable operation of the system.

Example 3

On the basis of Embodiment 1 and Embodiment 2, Embodiment 3 provides a method for purifying exhaust gas, including: controlling the transformer cabinet to output the power supply voltage required by the discharge equipment located in the electrode cabinet through the control cabinet; The equipment processes the exhaust gas entering the electrode cabinet.

Specifically, reference is made to the description of Embodiment 1 for the specific structure and working principle of the discharge device, which will not be repeated here.

Each device or component selected in this application is a general standard component or a component known to those skilled in the art, and the structures and principles thereof are known to those skilled in the art through technical manuals or through routine experimental methods.

In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or Integrally connected; either mechanical or electrical. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.

Claims (10)

1. A discharge device, characterized in that, comprising: several electrode plate sets, and The electrode plate group includes: several positive electrode plates and several negative electrode plates; each positive electrode plate and each negative electrode plate are arranged in parallel and uniformly staggered; and The air flow channel formed by the gap between adjacent positive and negative electrode plates. 2. The discharge device according to claim 1, characterized in that, The width of the airflow channel is 3-5mm. 3. The discharge device according to claim 2, characterized in that, The positive electrode plate includes: a first rectangular portion; The negative electrode plate includes: a second rectangular portion; and The area size of the second rectangular portion is not smaller than the area size of the first rectangular portion. 4. The discharge device according to claim 3, characterized in that, The positive electrode plate includes: a conductor, a silica gel plate attached to the surface of the conductor, and an insulating material coated on the outside of the silica gel plate. 5. A tail gas purification treatment system, characterized in that, comprising: Control cabinets, transformer cabinets and electrode cabinets; of which The electrode cabinet is provided with the discharge device according to any one of claims 1-4; The control cabinet is adapted to control the power supply voltage required by the transformer cabinet to output the discharge equipment; and The discharge equipment is suitable for processing the exhaust gas entering the electrode cabinet. 6. The exhaust gas purification treatment system according to claim 5, characterized in that, The exhaust gas purification and treatment system further includes: a high temperature and high humidity dust collector; The high temperature and high humidity dust collector is suitable for pretreatment of the exhaust gas entering the electrode cabinet. 7. The exhaust gas purification treatment system according to claim 6, characterized in that, The exhaust gas purification and treatment system further includes: a current monitoring module; The current monitoring module is adapted to collect current signals of each electrode plate group and send them to the control cabinet; and The control cabinet is suitable for disconnecting the power supply of the transformer and issuing an alarm signal when the current signal is abnormal. 8. The exhaust gas purification treatment system according to claim 7, characterized in that, The exhaust gas purification and treatment system further includes: a power monitoring module; The power monitoring module is adapted to collect parameter information of the power signal output by the transformer cabinet and send it to the control cabinet; and The control cabinet is suitable for displaying the parameter information of the power supply signal, and when the parameter information of the power supply signal is abnormal, the power supply of the transformer is disconnected, and an alarm signal is issued. 9. The exhaust gas purification treatment system according to claim 8, characterized in that, The exhaust gas purification and treatment system further includes: an ozone monitoring module; The ozone monitoring module is adapted to collect the ozone content of the treated exhaust gas and send it to the control cabinet; and The control cabinet is adapted to control the transformer cabinet to adjust the output power supply voltage according to the ozone content. 10. A method for purifying exhaust gas, comprising: The mains voltage required to output the discharge equipment located in the electrode cabinet by controlling the transformer cabinet through the control cabinet; and The exhaust gas entering the electrode cabinet is treated by the discharge equipment.

Images