Steam automatic fire extinguishing device for electrostatic precipitator of flue gas

Abstract

The utility model relates to the technical field of environmental protection equipment discloses a kind of steam automatic fire extinguishing device for baking flue gas electric tar catcher, including intake flue pipe, the intake flue pipe fixed connection steam fire stopper, the steam fire stopper fixed connection electric tar catcher intake end, the steam fire stopper fixed connection steam pipe, the steam pipe is connected with valve group, the steam pipe is connected with steam spray gun;The utility model can play the role of fire fighting and extinguishing in electric tar catcher and similar equipment, reaction time is fast, and fire extinguishing effect is good, and manufacturing cost is low, and starting electric dust collector can continue to work, and keep flue gas standard discharge.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, specifically to an automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas. Background Technology

[0002] An electrostatic precipitator is an industrial device that uses a high-voltage electric field to charge impurities such as dust and tar in asphalt fumes, separating them under the influence of the electric field to collect these impurities. Its working principle is as follows: a negative high voltage generated by a high-voltage DC power supply is connected to the corona electrode through an insulating box. A strong electric field is generated between the corona electrode and the precipitating electrode due to the high voltage. Tar, dust, and other particulate matter in the combustion fumes are charged in this strong electric field. Under the influence of the electric field force, the charged particles move towards the precipitating electrode. Upon reaching the precipitating electrode, which is the anode, the negatively charged particles undergo a neutralization reaction with the positively charged electrode. The neutralized particles are first adsorbed onto the precipitating electrode and then fall down the electrode plate into the ash hopper under their own gravity. Thus, the tar, dust, and other particulate matter in the fumes are separated from the flue gas. Traditional electrostatic precipitators for tar removal typically use water for extinguishing fires. This leads to a significant increase in the water content of the tar, creating difficulties for subsequent tar treatment. Furthermore, once activated, the electrostatic precipitator must be shut down, causing particulate matter and asphalt fumes in the flue gas to temporarily exceed standard levels.

[0003] Therefore, an automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas, so as to solve the problem that the fire extinguishing device for electrostatic precipitators mentioned in the background art is generally water-based, which will cause a significant increase in the water content in the tar, making it difficult for the subsequent treatment of the tar. At the same time, once started, the electrostatic precipitator must stop operating, causing the particulate matter and asphalt fumes in the flue gas to exceed the standard value for a short time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas, comprising an air inlet flue pipe, wherein the air inlet flue pipe is fixedly connected to a steam flame arrester, the steam flame arrester is fixedly connected to the air inlet end of the electrostatic precipitator, the steam flame arrester is fixedly connected to a steam pipe, the steam pipe is connected to a valve group, and the steam pipe is connected to a steam spray gun.

[0006] Preferably, the steam flame arrester includes a cylinder, with flanges at both ends of the cylinder, and an annular pipeline inside the cylinder.

[0007] Preferably, the nozzle of the steam spray gun has a venturi structure, which is used to accelerate the steam flow rate and disturb the mixing of flue gas and steam.

[0008] Preferably, the valve assembly includes a manual shut-off valve, a pressure reducing valve, and a solenoid valve. The pressure reducing valve is connected to the steam pipe, and the steam flow is controlled by controlling the opening and closing of the manual shut-off valve and the solenoid valve.

[0009] Preferably, the steam pipeline material is a seamless carbon steel pipe, and the pipeline maintains steam with a pressure P ≥ 0.8 MPa and a temperature > 200°C.

[0010] Preferably, both the inlet and outlet ends of the electrostatic precipitator are equipped with steam spray guns, and the steam spray guns are connected to steam pipes.

[0011] Preferably, the steam flame arrester, steam spray gun and steam pipe are connected in parallel to ensure that steam diffuses rapidly to all parts of the electrostatic precipitator cavity.

[0012] Preferably, the steam flame arrester is connected to the flange of the flue with flanges and bolted together. To prevent air leakage, asbestos packing is used for sealing between the flanges, and it is installed at the inlet flue of the electrostatic precipitator.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. When a fire occurs inside the electrostatic precipitator, the flue gas temperature gradually rises. Based on the data measured at the temperature measuring points, the system is quickly activated. The steam communication system injects a large amount of steam into the flue and cavity through the flame arresters and spray guns installed at these locations. The steam has a strong diffusion ability and quickly spreads to all parts of the cavity, achieving the purpose of extinguishing the fire by isolating the air and reducing the temperature.

[0015] 2. This utility model can play a fire-fighting role in electrostatic precipitators and similar equipment. It has a fast reaction time, good fire extinguishing effect, low manufacturing cost, and can continue to work after starting the electrostatic precipitator, ensuring that the flue gas meets emission standards. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the circuit structure of this utility model;

[0018] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0019] In the diagram: 1. Inlet flue pipe; 2. Steam flame arrester; 3. Electrostatic precipitator; 4. Steam pipe; 5. Valve assembly; 6. Steam spray gun; 7. Asbestos packing seal;

[0020] 201. Shell; 202. Flange; 203. Circular Pipeline;

[0021] 501. Manual shut-off valve; 502. Pressure reducing valve; 503. Solenoid valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] Please see Figures 1-3 The diagram shows an automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas. It includes an inlet flue pipe 1, a steam flame arrester 2 fixedly connected to the inlet of the electrostatic precipitator 3, a steam pipe 4 fixedly connected to the flame arrester 2, a valve group 5 connected to the steam pipe 4, and a steam spray gun 6 connected to the steam pipe 4. This invention can play a fire extinguishing role in electrostatic precipitators and similar equipment, with a fast response time, good fire extinguishing effect, low manufacturing cost, and can continue to operate after starting the electrostatic precipitator, ensuring that the flue gas emissions meet standards.

[0025] Furthermore, the steam flame arrester 2 includes a cylinder 201, with flanges 202 at both ends of the cylinder 201. An annular pipe 203 is provided inside the cylinder 201. The steam flame arrester 2 is bolted to the flange of the flue via flange connection. Asbestos packing is used to seal between the flanges to prevent air leakage. It is installed at the inlet flue of the electrostatic precipitator 3. Its main body is a cylinder with an annular steam pipe inside. Both ends are connected to the flue via flanges. Asbestos packing is used to seal between the flanges to prevent air leakage. Its function is to evenly inject steam into the inlet flue when a fire occurs, initially isolating oxygen and cooling it.

[0026] Furthermore, the nozzle of the steam lance 6 is a Venturi tube structure, which is used to accelerate the steam flow rate and disturb the mixing of flue gas and steam. This can accelerate the steam ejection speed, enhance the mixing disturbance with flue gas, and promote the diffusion of steam in the electrostatic precipitator cavity.

[0027] Furthermore, valve assembly 5 includes a manual shut-off valve 501, a pressure reducing valve 502, and a solenoid valve 503. The pressure reducing valve 502 is connected to the steam pipe 4. The steam flow is controlled by opening and closing the manual shut-off valve 501 and the solenoid valve 503. The valve assembly includes a manual shut-off valve, a pressure reducing valve, and a solenoid valve. The pressure reducing valve is used to stabilize the steam pressure. The solenoid valve is linked with a temperature sensor to achieve automatic opening and closing. The manual valve is used for maintenance or emergency manual operation.

[0028] Furthermore, the steam pipeline 4 is made of seamless carbon steel pipe. The pipeline maintains steam with a pressure P ≥ 0.8 MPa and a temperature > 200℃. As the main channel for steam transportation, the steam pipeline is made of seamless carbon steel pipe that is resistant to high pressure and high temperature to ensure that the steam pressure P ≥ 0.8 MPa and the temperature > 200℃ in the pipeline to meet the fire extinguishing requirements.

[0029] Furthermore, both the inlet and outlet ends of the electrostatic precipitator 3 are equipped with steam spray guns 6, which are connected to the steam pipe 4. The steam spray guns are installed not only at the inlet end of the electrostatic precipitator but also at the outlet end to ensure that the steam can fully cover the cavity of the electrostatic precipitator.

[0030] Furthermore, the steam flame arrester 2, the steam spray gun 6, and the steam pipe 4 are connected in parallel to ensure that the steam quickly diffuses to all parts of the electrostatic precipitator 3 chamber.

[0031] In this scheme, the workflow is as follows: Flue gas first enters the electrostatic precipitator 3 through the inlet flue pipe 1. The inlet flue pipe 1 is fixedly connected to the steam flame arrester 2 via flanges, ensuring smooth flue gas entry while the steam flame arrester 2 prepares for subsequent fire extinguishing steps. The steam flame arrester 2 is installed at the inlet end of the electrostatic precipitator 3. Its cylinder 201 has flanges 202 at both ends, and an annular pipe 203 is arranged inside for uniform steam distribution. The steam pipe 4 serves as the main channel for steam delivery, and its material is a seamless carbon steel pipe resistant to high pressure and high temperature, ensuring that the steam pressure P in the pipe is ≥0.8MPa and the temperature is >200℃ to meet fire extinguishing requirements. A valve assembly 5 is connected to the steam pipe 4, including a manual shut-off valve 501, a pressure reducing valve 502, and a solenoid valve 503. Pressure reducing valve 502 is used to regulate steam pressure to ensure stable steam pressure entering the system; manual shut-off valve 501 and solenoid valve 503 control the on / off of steam to achieve automated fire extinguishing operation; steam spray gun 6 is installed not only at the inlet end of electrostatic precipitator 3, but also at the outlet end to ensure that steam can fully cover the cavity of electrostatic precipitator 3. When an abnormal rise in smoke temperature is detected, the system quickly starts the fire extinguishing procedure. Solenoid valve 503 automatically opens after receiving the signal, and steam is sprayed into the cavity of electrostatic precipitator 3 through steam pipe 4 and steam spray gun 6 to achieve rapid fire extinguishing.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas, characterized in that: It includes an air intake flue pipe (1), which is fixedly connected to a steam flame arrester (2), which is fixedly connected to the air intake end of an electrostatic precipitator (3), which is fixedly connected to a steam pipe (4), which is connected to a valve group (5), and which is connected to a steam spray gun (6).

2. The automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas as described in claim 1, characterized in that: The steam flame arrester (2) includes a cylinder (201), both ends of which are provided with flanges (202), and an annular pipe (203) is provided inside the cylinder (201).

3. The automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas as described in claim 1, characterized in that: The nozzle of the steam spray gun (6) is a Venturi tube structure, which is used to accelerate the steam flow rate and disturb the mixing of flue gas and steam.

4. The automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas as described in claim 1, characterized in that: The valve group (5) includes a manual shut-off valve (501), a pressure reducing valve (502), and a solenoid valve (503). The pressure reducing valve (502) is connected to the steam pipe (4), and the steam flow is controlled by controlling the opening and closing of the manual shut-off valve (501) and the solenoid valve (503).

5. The automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas as described in claim 1, characterized in that: The steam pipe (4) is made of seamless carbon steel pipe, and the pipe contains steam with a pressure P≥0.8MPa and a temperature >200℃.

6. The automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas according to claim 1, characterized in that: The electrostatic precipitator (3) is equipped with a steam spray gun (6) at both the air inlet and outlet ends, and the steam spray gun (6) is connected to the steam pipe (4).

7. The automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas according to claim 1, characterized in that: The steam flame arrester (2), steam spray gun (6) and steam pipe (4) are connected in parallel to ensure that steam diffuses rapidly to all parts of the electrostatic precipitator (3) cavity.

8. The automatic steam fire extinguishing device for an electrostatic precipitator for roasting flue gas according to claim 2, characterized in that: The steam flame arrester (2) is bolted to the flange of the flue in the form of a flange connection. To prevent air leakage, asbestos packing seal (7) is added between the flanges and installed at the inlet flue of the electrostatic precipitator (3).

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