Raw material gas buffer tank with cleaning function and automatic regular online cleaning method

Abstract

The invention discloses a raw material gas buffer tank with a cleaning function and an automatic regular on-line cleaning method.The raw material gas buffer tank comprises a tank body, a spray gun assembly, a liquid supply assembly and an electric control cabinet, a wire mesh demister is arranged in the tank body, the spray gun assembly is provided with an annular pipe and a plurality of spray guns, and the annular pipe is kept fixed relative to the tank body; the spray guns are sequentially arranged in the annular direction of the gas outlet, each spray gun is provided with a gun barrel, a spray head connected to one end of the gun barrel and an on-off valve installed on the gun barrel, the gun barrels are communicated with the annular pipe and penetrate through the gas outlet of the tank body, the spray heads are opposite to the wire mesh demister, the liquid supply assembly is connected with the annular pipe, and the liquid supply assembly is used for providing cleaning liquid for the annular pipe. And the electrical control cabinet is in control connection with the on-off valve. According to the scheme, tar and dust mixtures, water drops and other impurities in raw material gas intercepted by the gas inlet side of the wire mesh demister can be automatically and efficiently cleaned and removed, the problem that the wire mesh demister is blocked by the tar and dust mixtures is solved, and the gas inlet flux of the centrifugal compressor is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of biological fermentation, and in particular to a raw gas buffer tank with a cleaning function and an automatic regular online cleaning method. Background Art

[0002] In the biological fermentation production process using coal gas as raw material, a raw coal gas buffer tank is provided at the inlet of the centrifugal compressor. The raw coal gas buffer tank is provided with an inlet, an outlet and a wire mesh demister installed between the inlet and the outlet.

[0003] Coal gas carries various impurities such as tar, dust, and chemical crystals. As the system operating time increases, the impurities blocked by the wire mesh demister are adsorbed or penetrated on the air inlet side of the wire mesh demister in large quantities, which reduces the flow area of ​​the wire mesh demister and the gas flow rate. The speed of the centrifugal compressor is forced to increase and the operating current increases, which seriously threatens the safe operation of the centrifugal compressor. Summary of the invention

[0004] In order to solve the above problems, the present application provides a raw gas buffer tank with a cleaning function and an automatic periodic online cleaning method.

[0005] The present application provides a raw gas buffer tank with a cleaning function, comprising a tank body, a spray gun assembly, a liquid supply assembly and an electrical control cabinet, wherein a wire mesh demister is arranged in the tank body, the tank body has a gas outlet, the spray gun assembly is provided with an annular pipe and a plurality of spray guns, the annular pipe is relatively fixed to the tank body, the plurality of spray guns are arranged in sequence along the annular direction of the gas outlet, the spray gun is provided with a gun barrel, a nozzle connected to one end of the gun barrel and an on-off valve installed on the gun barrel, the gun barrel is connected to the annular pipe and the gun barrel is penetrated through the gas outlet, the nozzle is opposite to the wire mesh demister, the liquid supply assembly is connected to the annular pipe, the liquid supply assembly is used to provide cleaning liquid to the annular pipe, and the electrical control cabinet is controlled and connected to the on-off valve.

[0006] In some embodiments, the spray gun assembly is further provided with an annular member, and the annular member is connected to the barrels of the plurality of spray guns.

[0007] In some embodiments, the gun barrel is also equipped with a first manual isolating valve and a check valve. Two first manual isolating valves are relatively provided. The two first manual isolating valves are respectively located on both sides of the on-off valve, and the check valve is spaced apart from the on-off valve.

[0008] In some embodiments, the liquid supply assembly includes a cleaning liquid storage tank, a delivery pump and a delivery pipeline. The cleaning liquid storage tank is used to store cleaning liquid. The delivery pump is connected to the cleaning liquid storage tank. Both ends of the delivery pipeline are respectively connected to the delivery pump and the ring pipe.

[0009] In some embodiments, the cleaning liquid storage tank is provided with a heat exchange tube, and the heat exchange tube is used to increase the temperature of the cleaning liquid in the cleaning liquid storage tank.

[0010] In some embodiments, the delivery pipeline is installed with a second isolation valve, a local pressure gauge, and a remote pressure gauge.

[0011] In some embodiments, the electrical control cabinet is connected to the delivery pump control.

[0012] In some embodiments, the cleaning fluid is a coal tar cleaning agent.

[0013] An automatic periodic online cleaning method is used, which uses the above-mentioned raw gas buffer tank with cleaning function. The automatic periodic online cleaning method includes: an electrical control cabinet controls the spray gun assembly to periodically spray cleaning liquid toward the wire mesh demister, and a preset time interval is set between two adjacent sprays. During each spraying process of the spray gun assembly, multiple spray guns spray cleaning liquid in a sequence of opening and closing and alternating back and forth.

[0014] In some embodiments, when multiple spray guns are opened and closed in sequence and alternately, the previous spray gun that is in the state of spraying the cleaning liquid is closed after the nozzle of the latter spray gun sprays the cleaning liquid.

[0015] The beneficial effects of the present application are as follows: a raw gas buffer tank with a cleaning function is provided, a spray gun assembly is installed at the gas outlet of the tank body with a wire mesh demister inside, cleaning liquid is provided to the annular tube through the liquid supply assembly, and the cleaning liquid is sprayed to the gas outlet side of the wire mesh demister through the spray gun assembly, the spray gun assembly is provided with an annular tube and multiple spray guns, and the multiple spray guns are arranged in sequence along the circumferential direction of the gas outlet, the spray gun is provided with a gun barrel, a nozzle connected to one end of the gun barrel and an on-off valve installed on the gun barrel, the operation of each spray gun can be controlled by an electrical control cabinet, all spray guns will not be turned on at the same time, only one or two spray guns will be turned on at the same time, and the process of turning on each spray gun in turn and flushing the wire mesh demister is described as one cleaning, in the electrical control cabinet The next cleaning is carried out after a certain interval under the action of the wire mesh demister, thereby realizing the automatic and regular online cleaning of the wire mesh demister in the raw gas buffer tank. The adoption of this scheme can automatically and efficiently clean and remove the tar dust mixture, water droplets and other debris in the raw gas trapped on the air inlet side of the wire mesh demister, thereby improving the problem of tar dust mixture clogging the wire mesh demister, ensuring the air intake flux of the centrifugal compressor and ensuring the smooth operation of the centrifugal compressor. This scheme realizes the automatic operation mode through the electrical control cabinet, and the cleaning interval and flushing time of each time can be flexibly adjusted. By regularly performing automatic online cleaning on the wire mesh demister, the clogging of the wire mesh demister can be effectively reduced, delayed and prevented, thereby ensuring the safe, stable and long-term operation of the centrifugal compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0017] Figure 1 A schematic diagram of the main structure of a raw gas buffer tank with a cleaning function provided in this application;

[0018] Figure 2 A schematic diagram of a spray gun for a raw gas buffer tank with a cleaning function provided in the present application;

[0019] Figure 3 A schematic diagram of an electrical control cabinet with a cleaning function provided in this application.

[0020] Figure markings: 100-tank body, 110-wire mesh demister, 121-gas outlet, 122-gas inlet, 200-spray gun assembly, 210-annular pipe, 220-spray gun, 221-gun barrel, 2211-on-off valve, 2212-first manual isolation valve, 2213-check valve, 222-nozzle, 230-annular part, 300-liquid supply assembly, 310-cleaning liquid storage tank, 311-heat exchange pipe, 320-delivery pump, 330-delivery pipeline, 331-second isolation valve, 332-local pressure gauge, 333-remote pressure gauge, 400-electrical control cabinet. DETAILED DESCRIPTION

[0021] The present application provides a raw gas buffer tank with a cleaning function, which can automatically clean the wire mesh demister 110 in the tank body 100 online. Figure 1 As shown, the tank body 100 is provided with a gas inlet 122 and a gas outlet 121. The gas outlet 121 is used to connect to the inlet end of the centrifugal compressor of the biological fermentation production system. The gas enters the tank body 100 from the gas inlet 122, and the gas is transported to the centrifugal compressor from the gas outlet 121. A gas channel between the gas inlet 122 and the gas outlet 121 is formed inside the tank body 100. The gas flows between the gas inlet 122 and the gas outlet 121 along the gas channel. The wire mesh demister 110 arranged in the tank body 100 is horizontally extended in the gas channel, and the gas flowing along the gas channel will flow through the wire mesh demister 110.

[0022] In some embodiments, see Figure 1, the gas outlet 121 is located at the top of the tank body 100, the gas inlet 122 is located at the side of the tank body 100, the wire mesh demister 110 is arranged horizontally, the lower side of the wire mesh demister 110 is the air inlet side, the upper side of the wire mesh demister 110 is the air outlet side, and the impurities blocked by the wire mesh demister 110 are adsorbed or infiltrated in large quantities on the lower side of the wire mesh demister 110, and the lower side of the wire mesh demister 110 is also the air inlet side of the wire mesh demister 110. When the biological fermentation production system is in operation, the raw gas enters the tank body 100 from the gas inlet 122 located in the middle of the tank body 100, the raw gas flows through the wire mesh demister 110, and the raw gas is output from the gas outlet 121 at the top of the tank body 100, and the raw gas is transported from the gas outlet 121 to the centrifugal compressor of the next process.

[0023] The raw gas buffer tank with cleaning function provided in the present application includes a tank body 100, a spray gun assembly 200, a liquid supply assembly 300 and an electrical control cabinet 400. The liquid supply assembly 300 is used to provide cleaning liquid to the annular tube 210 and the provided cleaning liquid has kinetic potential energy. Then the cleaning liquid is sprayed out through the spray gun assembly 200, and the cleaning liquid is specifically sprayed to the gas outlet side of the wire mesh demister 110. The working state of the spray gun assembly 200 is controlled by the electrical control cabinet 400. In some embodiments, please refer to Figure 3 The electrical control cabinet 400 can also control the operation of the liquid supply assembly 300. The electrical control cabinet 400 is the master control system of the present application.

[0024] For details, please refer to Figure 1 The spray gun assembly 200 is provided with an annular tube 210 and a plurality of spray guns 220. The plurality of spray guns 220 are all connected to the annular tube 210. The liquid supply assembly 300 is connected to the annular tube 210. The cleaning liquid is provided to the annular tube 210 through the liquid supply assembly 300, so that the cleaning liquid is sprayed out from the spray gun 220. The spray gun 220 is provided with a gun barrel 221, a nozzle 222 and an on-off valve 2211. The nozzle 222 is connected to one end of the gun barrel 221. The on-off valve 2211 is installed on the gun barrel 221. The gun barrels 221 are all connected to the annular tube 210. The annular tube 210 is relatively fixed to the tank body 100. The gun barrel 221 is penetrated through the gas outlet 121, and the plurality of spray guns 220 are arranged in sequence along the annular direction of the gas outlet 121. The nozzle 222 is opposite to the wire mesh demister 110. The nozzle 222 faces the gas outlet side of the wire mesh demister 110. Please refer to Figure 3 The electrical control cabinet 400 is connected to the on-off valve 2211 for controlling operation of each spray gun 220 .

[0025] The raw gas buffer tank with cleaning function of the present application scheme is applied in a biological fermentation production system, and the gas outlet 121 of the tank body 100 is connected to the inlet end of the centrifugal compressor of the biological fermentation production system, so that the wire mesh demister 110 in the tank body 100 can be automatically cleaned online. When the wire mesh demister 110 in the tank body 100 is automatically cleaned online, all the spray guns 220 will not be turned on at the same time, and only one or two spray guns 220 will be turned on at the same time. When the spray gun 220 sprays the cleaning liquid to the outlet side of the wire mesh demister 110, the raw coal gas can still pass through the wire mesh demister 110 from the inlet side of the wire mesh demister 110. In actual operation, the cleaning of the wire mesh demister 110 by the spray gun 220 and the raw coal gas passing through the wire mesh demister 110 and output from the tank body 100 can be carried out simultaneously. Therefore, in the present application scheme, whether it is a cleaning process or a non-cleaning process, the tank body 100 can provide raw coal gas to the centrifugal compressor of the biological fermentation production system, and the wire mesh demister 110 of the raw coal gas buffer tank is cleaned online. The process of opening each spray gun 220 in turn and flushing the wire mesh demister 110 is described as one cleaning. When the previous cleaning is completed, the next cleaning is carried out after a certain period of time under the action of the electrical control cabinet 400. For example, in one cleaning, each spray gun is turned on for 30 seconds, and 8 spray guns are turned on for a total of 240 seconds. Each automatic cleaning interval is 4 hours, and the next cleaning is performed after 4 hours. Each cleaning time and cleaning interval can be adjusted according to actual operation needs. The electrical control cabinet 400 can be used to automatically clean the wire mesh demister 110 of the raw gas buffer tank. Combined with the above-mentioned online cleaning of the wire mesh demister 110 of the raw gas buffer tank, it is possible to automatically and regularly clean the wire mesh demister 110 in the raw gas buffer tank online.

[0026] The present application scheme realizes an automated operation mode through an electrical control cabinet 400. The cleaning interval and flushing time of each time can be flexibly adjusted. The wire mesh demister 110 in the raw gas buffer tank is automatically and regularly cleaned online, which can effectively remove the tar dust mixture, water droplets and other debris in the raw gas trapped on the air inlet side of the wire mesh demister 110, effectively delay the clogging degree of the wire mesh demister 110, and improve the problem of tar dust mixture clogging the wire mesh demister 110, thereby ensuring the air intake flux of the centrifugal compressor, thereby ensuring the safe operation, stable operation and long-term operation of the centrifugal compressor.

[0027] In some embodiments, see Figure 1The stability of the spray gun 220 in motion is improved by the annular member 230. The annular member 230 is a part of the spray gun assembly 200 and can be made of steel. The annular member 230 is connected to the barrels 221 of the plurality of spray guns 220. The annular direction of the annular member 230 is the same as the annular direction of the gas outlet 121. The barrels 221 of the plurality of spray guns 220 are connected again by the annular member 230, thereby improving the violent swing of a spray gun 220 when spraying the cleaning liquid.

[0028] In the above scheme in which the ring member 230 is provided, in some embodiments, please refer to Figure 1 The annular tube 210 is connected to one end of the spray gun 220 away from the spray head 222 , the annular member 230 is connected to one end of the spray gun 220 close to the spray head 222 , and the annular member 230 is located inside the tank body 100 .

[0029] In some embodiments, the on-off valve 2211 on the gun barrel 221 is a pneumatic quick-opening valve, and the electrical control cabinet 400 is control-connected to the pneumatic quick-opening valve.

[0030] In some embodiments, see Figure 2 The gun barrel 221 is equipped with two first manual isolating valves 2212, which are respectively located on both sides of the on-off valve 2211, and the on-off state of the first manual isolating valve 2212 can be switched manually.

[0031] In some embodiments, see Figure 2 The gun barrel 221 is equipped with a check valve 2213, which is spaced apart from the on-off valve 2211. The check valve 2213 is arranged behind the pneumatic quick-opening valve and the first manual isolating valve 2212 in the fluid flow direction in the gun barrel 221. The check valve 2213 has the beneficial effect of preventing the backflow of the cleaning fluid.

[0032] Please refer to Figure 1 The liquid supply assembly 300 is provided with a cleaning liquid storage tank 310, and the cleaning liquid storage tank 310 stores cleaning liquid. Figure 1 The liquid supply assembly 300 is provided with a delivery pump 320 and a delivery pipeline 330. The delivery pump 320 is connected to the cleaning liquid storage tank 310. The two ends of the delivery pipeline 330 are respectively connected to the delivery pump 320 and the annular pipe 210. When the delivery pump 320 is turned on and the valve of the liquid supply assembly 300 is in an open state, the cleaning liquid is delivered from the cleaning liquid storage tank 310 to the spray gun assembly 200 under high pressure. The valve of the liquid supply assembly 300 includes a valve on the delivery pipeline 330 and a valve between the delivery pump 320 and the cleaning liquid storage tank 310.

[0033] In some embodiments, see Figure 1Isolation valves are provided before and after the delivery pump 320, and the isolation valves before and after the delivery pump 320 provide convenience for disassembly, replacement or maintenance of the delivery pump 320.

[0034] In some embodiments, the cleaning liquid is a coal tar cleaning agent, which is a solvent type. The cleaning efficiency of the coal tar cleaning agent for tar cleaning is extremely high. The coal tar cleaning agent has no corrosion or damage to various common carbon steel, stainless steel, copper, iron and other metals. Its cleaning principle is to rely on the action of the penetrant to allow the cleaning agent to quickly penetrate into the oil scale layer, and decompose the macromolecular insoluble oil scale into small molecular oil structure through special chemical action, so that the small molecular oil scale is integrated into the cleaning agent under the action of the penetrant, and the oil scale is removed with the physical action of the circulation flow of the cleaning agent. The coal tar cleaning agent is used to clean the tar, so that the tar is dissolved in a short time and is flushed to the bottom of the tank body 100 by the cleaning liquid sprayed from the spray gun 220. When the coal tar cleaning agent is used to clean various types of grease, the cleaning cost can be greatly reduced, the cleaning cost can be saved, and the safety hazards and environmental pollution can be reduced. The coal tar cleaning agent has good stability and is not easy to volatilize. The coal tar cleaning agent is used to automatically and regularly clean the wire mesh demister 110 in the raw gas buffer tank online, which will not affect the raw gas components and will not increase adverse impurities. The cleaning efficiency of using the coal tar cleaning agent to clean the tar is higher than the cleaning efficiency of using gasoline and kerosene to clean the tar, and there is no kerosene odor and safety hazards in the gasoline and kerosene cleaning method.

[0035] In some embodiments, see Figure 1 The cleaning liquid storage tank 310 is provided with a heat exchange tube 311. The heat exchange tube 311 may be in the form of a coil. The heat exchange tube 311 is connected to a heat source. The medium of the heat source may be gaseous or liquid. When the heat source medium flows through the heat exchange tube 311, the temperature of the cleaning liquid in the cleaning liquid storage tank 310 may be increased through heat exchange inside and outside the heat exchange tube 311. The temperature of the cleaning liquid in the cleaning liquid storage tank 310 is increased by using the heat exchange tube 311 and supporting equipment, so that the activity of the dissolved liquid is enhanced and the tar removal effect is better. In some embodiments, the cleaning liquid in the cleaning liquid storage tank 310 is heated to 50°C to 60°C by using the heat exchange tube 311, which has a better cleaning effect on the wire mesh demister 110. Please refer to Figure 1 The cleaning fluid storage tank 310 is equipped with a temperature measuring device for measuring the temperature of the cleaning fluid.

[0036] In some embodiments, see Figure 1 The delivery pipeline 330 is installed with a second isolation valve 331, and the second isolation valve 331 can control the on-off of the delivery pipeline 330.

[0037] In some embodiments, see Figure 1The delivery pipeline 330 is equipped with a remote pressure gauge 333, which can transmit the measured value to the electrical control cabinet 400 far away from the measurement location in the form of electricity, thus realizing centralized detection and remote control. Figure 1 The delivery pipeline 330 is installed with an on-site pressure gauge 332, which is a pressure gauge indicated on site. The beneficial effect of using the on-site pressure gauge 332 and the remote pressure gauge 333 is that the liquid pressure of the cleaning liquid in the delivery pipeline 330 can be detected to ensure the cleaning effect of the cleaning liquid sprayed from the spray gun 220 on the wire mesh demister 110. When the liquid pressure of the cleaning liquid in the delivery pipeline 330 is less than the minimum allowable pressure value, the output pressure of the delivery pump 320 can be appropriately increased to adjust the liquid pressure of the cleaning liquid in the delivery pipeline 330 to be greater than the minimum allowable pressure value. The minimum allowable pressure value is a set value based on the on-site equipment, and the minimum allowable pressure value needs to be determined in advance based on the on-site equipment.

[0038] As mentioned above, the electrical control cabinet 400 can also control the operation of the liquid supply assembly 300. The liquid supply assembly 300 includes a cleaning liquid storage tank 310, a delivery pump 320 and a delivery pipeline 330. Figure 3 The embodiment shown is that the electrical control cabinet 400 is controlled and connected to the delivery pump 320. The wire mesh demister 110 will be cleaned only when the delivery pump 320 and the valve are opened at the same time.

[0039] Here, the electrical control cabinet 400 is further explained as follows: the electrical control cabinet 400 is the core device for realizing automatic cleaning, the electrical control cabinet 400 has an automatic start-stop controller for controlling the delivery pump 320, and also has a time relay for controlling the triggering time of the automatic start-stop controller; the electrical control cabinet 400 has an automatic start-stop controller for controlling the on-off valve 2211 on the barrel 221, and also has a time relay for controlling the opening and closing time points of the on-off valve 2211; thus, the electrical control cabinet 400 can control the automatic opening and closing of the delivery pump 320 and the on-off valve 2211 on the barrel 221, so that the online cleaning work of the wire mesh demister 110 in the raw gas buffer tank in the present application scheme can be automatically and regularly performed, which has the advantage of fully automatic operation and effectively solves the problem of frequent blockage of the wire mesh demister 110.

[0040] The present application also provides an automatic periodic online cleaning method, which applies the above-mentioned raw gas buffer tank with a cleaning function to a biological fermentation production system, so that the tank body 100 of the raw gas buffer tank and the gas outlet 121 are connected to the inlet end of the centrifugal compressor. In this method, the electrical control cabinet 400 controls the spray gun assembly 200 to periodically spray cleaning liquid toward the wire mesh demister 110. During one cleaning process of the spray gun assembly 200, multiple spray guns 220 are opened and closed in sequence and alternately back and forth. All spray guns 220 will not be opened at the same time. Only one or two spray guns 220 will be opened at the same time. When the previous spray gun 220 finishes cleaning the wire mesh demister 110, the next spray gun 220 continues to clean the wire mesh demister 110. During one cleaning process, all spray guns 220 will be opened and closed once. Under the control of the electrical control cabinet 400, the wire mesh demister 110 in the raw gas buffer tank is automatically and periodically cleaned online, and a certain preset time is separated between two adjacent cleanings.

[0041] For example, in one cleaning, each spray gun is turned on for 30 seconds, and 8 spray guns are turned on for a total of 240 seconds. The interval between each automatic cleaning is 4 hours, and the next cleaning is performed after 4 hours. The time for each cleaning and the cleaning interval can be adjusted according to actual operating needs.

[0042] In some embodiments, after the nozzle 222 of the next spray gun 220 sprays the cleaning liquid, the previous spray gun 220 in the state of spraying the cleaning liquid is closed. For example, 0-30s belongs to the cleaning range of the first spray gun, the second spray gun is turned on at any time point in the range of 27s to 28s, the first spray gun is turned off at 30s, and the second spray gun cleans the wire mesh demister 110 from the time period from the time of turning on to the time of 60s, the third spray gun is turned on at any time point in the range of 57s to 58s, the second spray gun is turned off at the time of 60s, and the third spray gun 220 cleans the wire mesh demister 110 from the time period from the time of turning on to the time of 90s, and this is inwardly extended until all the spray guns 220 are turned on and off once, completing a complete cleaning process of the wire mesh demister 110. The above method can avoid the situation where the next spray gun is not opened when the previous spray gun is closed, thereby avoiding the defect of excessive pressure in the conveying pipeline 330 during the time period between the previous spray gun being closed and the next spray gun being opened, thereby ensuring the smooth operation of the present application scheme.

[0043] Based on the above setting that the plurality of spray guns 220 are sequentially arranged in a circumferential direction along the gas outlet 121 , in some embodiments, the plurality of spray guns 220 are sequentially opened in a circumferential order.

[0044] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0045] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A raw gas buffer tank with a cleaning function, characterized in that: include: A tank body, in which a wire mesh demister is arranged, and the tank body has a gas outlet; A spray gun assembly, comprising an annular tube and a plurality of spray guns, wherein the annular tube is relatively fixed to the tank body, the plurality of spray guns are sequentially arranged along the annular direction of the gas outlet, the spray gun is provided with a gun barrel, a spray head connected to one end of the gun barrel, and an on-off valve installed on the gun barrel, the gun barrel is communicated with the annular tube and the gun barrel is passed through the gas outlet, and the spray head is opposite to the wire mesh demister; A liquid supply assembly, connected to the annular tube, for providing cleaning liquid to the annular tube; as well as An electrical control cabinet is connected to the on-off valve control.

2. The raw gas buffer tank with cleaning function as claimed in claim 1, characterized in that: The spray gun assembly is also provided with an annular member, and the annular member is connected to the gun barrels of the plurality of spray guns.

3. The raw gas buffer tank with cleaning function as claimed in claim 1, characterized in that: The barrel is also equipped with: Two first manual isolating valves are provided opposite to each other, and the two first manual isolating valves are respectively located on both sides of the on-off valve; The check valve is spaced apart from the on-off valve.

4. The raw gas buffer tank with cleaning function according to any one of claims 1 to 3, characterized in that: The liquid supply assembly comprises: A cleaning fluid storage tank, used for storing cleaning fluid; A delivery pump connected to the cleaning liquid storage tank; The delivery pipeline has two ends respectively connected with the delivery pump and the annular pipe.

5. The raw gas buffer tank with cleaning function as claimed in claim 4, characterized in that: The cleaning liquid storage tank is provided with a heat exchange tube, and the heat exchange tube is used to increase the temperature of the cleaning liquid in the cleaning liquid storage tank.

6. The raw gas buffer tank with cleaning function as claimed in claim 4, characterized in that: The delivery pipeline is installed with a second isolation valve, a local pressure gauge and a remote pressure gauge.

7. The raw gas buffer tank with cleaning function as claimed in claim 4, characterized in that: The electrical control cabinet is control-connected to the delivery pump.

8. The raw gas buffer tank with cleaning function as claimed in claim 1, characterized in that: The cleaning liquid is a coal tar cleaning agent.

9. An automatic periodic online cleaning method, characterized in that: Using the raw gas buffer tank with cleaning function as described in any one of claims 1 to 8, the automatic periodic online cleaning method comprises: The electrical control cabinet controls the spray gun assembly to regularly spray the cleaning liquid toward the wire mesh demister, with a preset time interval between two adjacent sprays. During each spraying process of the spray gun assembly, multiple spray guns spray the cleaning liquid in a sequentially opened and closed and back-and-forth alternating manner.

10. The automatic periodic online cleaning method according to claim 9, characterized in that: In a manner where the plurality of spray guns are opened and closed in sequence and alternately, the previous spray gun that is in the state of spraying the cleaning liquid is closed after the nozzle of the latter spray gun sprays the cleaning liquid.

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