Tail gas treatment system

Abstract

The utility model provides a tail gas treatment system, and belongs to the technical field of flue gas treatment. The system comprises a plurality of water seal tanks, a combustor, a double-rotation drying furnace, a water spray tower and environment-friendly treatment equipment. And each water seal tank comprises a gas conveying tank and a liquid conveying tank. The gas conveying groove is used for conveying combustible tail gas. The liquid conveying groove is used for gathering condensate water in the combustible tail gas. And the plurality of water seal tanks are communicated with the combustor. The types of the water seal tanks are different, and the water seal tanks are used for preliminarily filtering and conveying combustible tail gas. The combustor comprises an air distribution pipe, a combustion cavity, a fuel gas adjusting valve, a multi-head inner mixing combustion disc, a flame monitor and a gas conveying pipeline. The air distribution pipe comprises a plurality of air supply pipelines. The multiple air supply pipelines correspondingly communicate with the combustion cavity. And the plurality of water seal tanks are communicated with the first pipeline of the air distribution pipe. The fuel gas adjusting valve is arranged on the first pipeline of the air distribution pipe and used for adjusting the flow of the combustible tail gas. The first pipeline of the air distribution pipe is used for inputting combustible tail gas. The multi-head inner mixing combustion disc and the flame monitor are both arranged in the combustion cavity. And the combustion cavity is communicated with the gas pipeline. And the gas pipeline is communicated with the double-rotation drying furnace. And the double-rotation drying furnace is communicated with the water spray tower. And the water spray tower is communicated with the environment-friendly treatment equipment. The combustion efficiency can be improved, and secondary pollution is prevented.

Description

Technical Field

[0001] The present disclosure relates to the technical field of flue gas treatment, and in particular to an exhaust gas treatment system. Background Art

[0002] With the vigorous development of modern industry, a large amount of production tail gas has caused serious damage to the environment. Not only that, the combustible waste gas carried in the tail gas may also cause explosion accidents, posing a greater hidden danger to people's production safety. Therefore, how to treat tail gas safely and environmentally friendly has become a major problem that people urgently need to solve. In the prior art, the treatment of tail gas usually adopts the method of tail gas combustion. However, today, as environmental awareness is gradually strengthened, due to the low tail gas concentration that cannot reach the ignition point, incomplete tail gas combustion, and other pollutants that may be produced after combustion, the current tail gas treatment is still one of the difficult problems to solve. How to fully treat the tail gas while ensuring safety and environmental protection has become the current research goal. Therefore, there is an urgent need for a tail gas treatment system to solve the above problems. Utility Model Content

[0003] The disclosed embodiment provides an exhaust gas treatment system to solve the problem of insufficient exhaust gas treatment and potential environmental risks.

[0004] The embodiment of the present disclosure provides an exhaust gas treatment system, comprising:

[0005] Multiple water seal tanks, burners, double rotary drying furnaces, water spray towers and environmental protection treatment equipment.

[0006] Each water seal tank comprises a gas delivery tank and a liquid delivery tank. The gas delivery tank is used to deliver combustible tail gas. The liquid delivery tank is used to collect condensed water in the combustible tail gas.

[0007] The multiple water seal grooves are all connected to the burner. The models of the water seal grooves are different, and each water seal groove is used for preliminary filtering and conveying combustible tail gas.

[0008] The burner comprises: an air distribution pipe, a combustion chamber, a gas regulating valve, a multi-head internal mixing combustion disk, a flame monitor and a gas transmission pipeline.

[0009] The air distribution pipe includes a plurality of air supply pipes. The plurality of air supply pipes are all connected to the combustion chamber. The plurality of water seal grooves are all connected to the first pipe of the air distribution pipe. The gas regulating valve is arranged on the first pipe of the air distribution pipe, and is used to adjust the flow rate of combustible tail gas. The first pipe of the air distribution pipe is used to input combustible tail gas. The multi-head internal mixing combustion disk and the flame monitor are both arranged inside the combustion chamber. The combustion chamber is connected to the gas supply pipe.

[0010] The gas pipeline is in communication with the double rotary drying furnace, the double rotary drying furnace is in communication with the water spray tower, and the water spray tower is in communication with the environmental protection treatment equipment.

[0011] In an exemplary embodiment of the present disclosure, a concentration sensor is further provided between the double rotary drying furnace and the water spray tower. The exhaust gas treatment system further includes: a controller.

[0012] The concentration sensor is connected to the controller.

[0013] The controller is connected to the flow control valve in the water spray tower, and is configured to control the spraying volume of the water spray tower according to the concentration data collected by the concentration sensor.

[0014] In an exemplary embodiment of the present disclosure, the water spray tower is a three-stage absorption tower.

[0015] In an exemplary embodiment of the present disclosure, the plurality of water seal grooves include:

[0016] Dry water seal tank, wet water seal tank and belt water seal tank.

[0017] The dry water seal groove, the wet water seal groove and the belt water seal groove are connected to each other. A control valve is arranged on the connecting pipeline formed among the dry water seal groove, the wet water seal groove and the belt water seal groove.

[0018] In an exemplary embodiment of the present disclosure, a safety valve is provided at the inlet end of each water seal tank, and the safety valve is used to control the input flow rate of the combustible tail gas.

[0019] In an exemplary embodiment of the present disclosure, the exhaust gas treatment system further includes:

[0020] Blower. The blower is used to transport air. The blower is connected to the second pipeline of the air distribution pipe.

[0021] In an exemplary embodiment of the present disclosure, the air distribution duct further includes:

[0022] A natural gas pipeline. The natural gas pipeline is used to transport natural gas. The natural gas pipeline is connected to the combustion chamber.

[0023] In an exemplary embodiment of the present disclosure, the burner further comprises:

[0024] Igniters and ignition devices.

[0025] The igniter is used to output high voltage electricity.

[0026] The ignition device includes: an ignition valve and an ignition gun. The ignition valve is used to ignite the ignition gun and the combustible tail gas in the first pipe. The ignition gun contains an ignition needle. The ignition needle is used to generate sparks from the high voltage electricity of the igniter.

[0027] In an exemplary embodiment of the present disclosure, an induced draft fan is further provided between the double rotary drying furnace and the water spray tower.

[0028] The beneficial effects of the tail gas treatment system provided by the embodiment of the present disclosure are as follows:

[0029] First, the exhaust gas treatment system provided by the present invention can transmit a variety of gases into the combustion chamber through the air distribution pipe, gather them in the multi-head internal mixing combustion disk, fully mix them with the exhaust gas, and through the intelligent control of the burner, realize the full combustion of the exhaust gas and improve the combustion efficiency.

[0030] Second, the exhaust gas treatment system provided in this embodiment can utilize a flame monitor to monitor the flame temperature and flame intensity in real time to prevent safety accidents.

[0031] Third, the exhaust gas treatment system provided in this embodiment can process the exhaust gas after combustion through a multi-stage purification process of a double rotary drying furnace and a water spray tower, thereby preventing the generation of other harmful gases and causing secondary pollution to the environment, and ensuring that the exhaust gas after combustion meets the emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 is a schematic structural diagram of an exhaust gas treatment system provided by an embodiment of the present disclosure;

[0034] Figure 2 is a work flow chart of the exhaust gas treatment system provided by an embodiment of the present disclosure;

[0035] Figure 3 is a schematic diagram of an exhaust gas treatment system provided by an embodiment of the present disclosure;

[0036] Figure 4 It is a schematic diagram of another exhaust gas treatment system provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0038] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0039] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings:

[0040] Figure 1 This is a schematic diagram of the structure of an exhaust gas treatment system provided by an embodiment of the present disclosure. Figure 1 , the tail gas treatment system 10 comprises:

[0041] A plurality of water seal tanks 11, a burner 12, a double rotary drying furnace 13, a water spray tower 14 and an environmental protection treatment device 15.

[0042] Each water seal tank 11 comprises a gas delivery tank and a liquid delivery tank. The gas delivery tank is used to deliver combustible tail gas. The liquid delivery tank is used to collect condensed water in the combustible tail gas.

[0043] A plurality of water seal grooves 11 are all connected to the burner. The models of the water seal grooves 11 are different, and the water seal grooves 11 are used for preliminary filtering and conveying the combustible tail gas.

[0044] The burner 12 includes: an air distribution pipe 121, a combustion chamber 122, a gas regulating valve 123, a multi-head internal mixing combustion disk 124, a flame monitor 125 and a gas transmission pipeline 126.

[0045] The air distribution pipe 121 includes a plurality of air supply pipes. The plurality of air supply pipes are connected to the combustion chamber 122. The plurality of water seal grooves 11 are connected to the first pipe of the air distribution pipe 121. The gas regulating valve 123 is arranged on the first pipe of the air distribution pipe, and is used to adjust the flow rate of the combustible tail gas. The first pipe of the air distribution pipe 121 is used to input the combustible tail gas. The multi-head internal mixing combustion disk 124 and the flame monitor 125 are both arranged inside the combustion chamber 122. The combustion chamber 122 is connected to the gas supply pipe 126.

[0046] The gas pipeline 126 is in communication with the double rotary drying furnace 13. The double rotary drying furnace 13 is in communication with the water spray tower 14. The water spray tower 14 is in communication with the environmental protection treatment equipment 15.

[0047] In this embodiment, the tail gas treatment system 10 includes: multiple water seal tanks 11, a burner 12, a double rotary drying furnace 13, a water spray tower 14 and an environmental protection treatment device 15. Among them, multiple water seal tanks 11 are commonly used equipment in the waste gas treatment process, and are used to treat waste gas generated in industrial production. The working principle of the water seal tank 11 is to use the sealing effect of water to intercept harmful gases in the combustible tail gas in the water seal tank 11, so as to achieve the purpose of purifying the tail gas. Each water seal tank 11 includes a gas delivery tank and a liquid delivery tank, wherein the gas delivery tank is used to transport the combustible tail gas, and the gas delivery tank is connected to the burner 12 to transport the combustible tail gas to the burner 12; the liquid delivery tank is used to gather condensed water in the combustible tail gas. The multiple water seal tanks 11 are composed of multiple water seal tanks 11 of different models, and each water seal tank 11 is responsible for preliminary filtering of harmful gases in the combustible tail gas and transporting them to the burner 12. In practical applications, the water seal tank 11 is mainly used to treat tail gas containing flammable, explosive, toxic and other harmful gases.

[0048] The burner 12 is a general term for a device that mixes combustible tail gas and air in a certain way for combustion. The burner 12 in this embodiment is different from the traditional burner that adopts wind dispersion (i.e., using blast to forcibly disperse the gas). The burner 12 adopts a combustion method that combines multi-head internal mixing with wind dispersion, i.e., air and gas are mixed in batches to ensure that air and fuel gas are fully mixed and improve combustion efficiency. Its automatic control system adopts air door adjustment ratio control technology, which combines combustion with computer digital technology to accurately match the combustible tail gas content and air volume, fully burn, and achieve the best effect.

[0049] Among them, the double rotary drying furnace 13 is a common drying equipment, which is mainly used to eliminate the moisture carried in the gas. The water spray tower 14 is a common waste gas treatment equipment, which mainly uses the contact between water and gas to absorb and purify harmful gases. In the water spray tower 14, water is sprayed into the tower through a nozzle to form a water film or water droplets in contact with the gas. The harmful gas is absorbed by the water and discharged from the bottom of the tower, and the purified gas is discharged from the top of the tower. The environmental protection treatment equipment 15 is an environmental protection equipment that uses different process technologies to protect the environment and purify the air by recycling, removing or reducing harmful components in the waste gas.

[0050] In this embodiment, the burner 12 includes: an air distribution pipe 121, a combustion chamber 122, a gas regulating valve 123, a multi-head internal mixing combustion disk 124, a flame monitor 125, and a gas pipeline 126. Among them, the air distribution pipe 121 is a pipeline for conveying various types of gases. The air distribution pipe 121 includes multiple air supply pipes, wherein the first pipe is used to input combustible tail gas, multiple water seal grooves 11 are connected to the first pipe of the air distribution pipe 121, and multiple air supply pipes are correspondingly connected to the combustion chamber 122. The combustion chamber 122 is a device for fully mixing and burning combustible tail gas and air. The gas regulating valve 123 is used to adjust the gas flow rate of the first pipe, and it has multiple functions such as automatic overheating and overload protection. The gas regulating valve 123 is arranged on the first pipe of the air distribution pipe 121, and is used to adjust the input flow rate of combustible tail gas. The combustion chamber 122 is connected to the gas supply pipe 126, and the gas supply pipe 126 is used to discharge the burned gas from the combustion chamber 122.

[0051] The multi-head internal mixing combustion disk 124 is used to receive multiple gases transported in multiple delivery pipelines and provide a combustion site. The flame monitor 125 is used to detect flames. When its probe encounters ultraviolet light, the photosensitive tube is triggered, and the input circuit processes the signal and outputs a pulse signal. After the central processor of the burner 12 collects the pulse signal, the pulse signal is analyzed and the results of the analysis and judgment are transmitted to the alarm circuit and the flame intensity display circuit. The multi-head internal mixing combustion disk 124 and the flame monitor 125 are both arranged inside the combustion chamber 122.

[0052] In this embodiment, the gas pipeline 126 is connected to the double rotary drying furnace 13, and the gas pipeline 126 is responsible for transmitting the exhaust gas after combustion from the combustion chamber 122 to the double rotary drying furnace 13. The double rotary drying furnace 13 is connected to the water spray tower 14. After the drying treatment of the double rotary drying furnace 13, the treated exhaust gas is transmitted to the water spray tower 14. The water spray tower 14 is connected to the environmental protection treatment equipment 15, and finally after the purification treatment of the water spray tower 14, the exhaust gas is transmitted to the environmental protection treatment equipment 15 for environmental protection treatment, and finally the treated exhaust gas can meet the emission standards.

[0053] It can be concluded from the above that this embodiment is different from the traditional burner, and can mix multiple gases with the tail gas for full combustion, improve the combustion efficiency, and the tail gas after combustion is purified through multi-stage treatment, effectively eliminating harmful gases and preventing secondary pollution. This embodiment can also select the corresponding water seal groove 11 for filtering according to the composition of the input combustible tail gas, so as to ensure that the harmful gases in the combustible tail gas can be fully filtered. This embodiment has the advantages of saving energy, improving the exhaust gas combustion efficiency, effectively protecting the environment, and reducing labor costs.

[0054] In one embodiment of the present disclosure, a concentration sensor 141 is further provided between the double rotary drying furnace 13 and the water spray tower 14. The tail gas treatment system 10 further includes: a controller 16.

[0055] The concentration sensor 141 is connected to the controller 16 .

[0056] The controller 16 is connected to the flow control valve in the water spray tower 14 , and is configured to control the spraying amount of the water spray tower 14 according to the concentration data collected by the concentration sensor 141 .

[0057] In this embodiment, a concentration sensor 141 is also provided between the double rotary drying furnace 13 and the water spray tower 14. The concentration sensor 141 is a sensor that can detect the gas concentration in the environment, and is mainly used to monitor the exhaust gas concentration after the double rotary drying furnace 13 is dried, so as to control the spray flow rate of the water spray tower 14 according to the exhaust gas concentration. The exhaust gas treatment system 10 also includes: a controller 16. The controller 16 is used to control the spray amount of the water spray tower 14, the concentration sensor 141 is connected to the controller 16, and the controller 16 is connected to the flow control valve in the water spray tower 14. The controller 16 selects the spray mode of the water spray tower 14 according to the exhaust gas concentration detected by the concentration sensor 141. When the exhaust gas concentration is large, the controller 16 controls the water spray tower 14 to be in a spray mode with a large flow rate, so as to ensure that the exhaust gas with a large concentration is fully purified. When the exhaust gas concentration is small, the controller 16 controls the water spray tower 14 to be in a spray mode with a small flow rate to avoid wasting resources.

[0058] It can be concluded from the above that the present embodiment monitors the concentration of the tail gas entering the water spray tower 14 by setting the concentration sensor 141, and the controller 16 selects the spray mode of the water spray tower 14 according to the tail gas concentration, so as to accurately control the spray flow of the water spray tower 14. The present embodiment can flexibly select the spray mode and intelligently control the spray flow of the water spray tower 14, so as to achieve the purpose of saving resources and improving resource utilization.

[0059] In one embodiment of the present disclosure, the water spray tower 14 is a three-stage absorption tower.

[0060] In this embodiment, the water spray tower 14 is a three-stage absorption tower, and the exhaust gas after combustion is fully purified by absorbing different gases in the three-stage absorption tower. The specific purification process is as follows:

[0061] The tail gas after combustion is sent to the double rotary drying furnace 13 through the gas pipeline 126. The tail gas enters the superheater of the double rotary drying furnace 13 after mixing with methanol steam, air and steam generated by the boiler, and is heated to about 120°C by steam in the superheater, and then passes through the flame arrester after purification by the filter and then enters the oxidizer, and contacts with the silver catalyst at a temperature of about 20kpa and 600°C. Most of the methanol is converted into formaldehyde and releases a large amount of reaction heat. The high-temperature gas generated after the above operation quickly passes through the quenching section of the oxidizer, and the heat it carries is heat exchanged with the soft water from the bubbles of the oxidizer through the tube wall, and the saturated water vapor generated indirectly enters the steam distributor for production use, and the product generated after cooling is sent to the primary absorption tower for absorption operation.

[0062] The formaldehyde mixed gas from the oxidizer is transported to the bottom of the primary absorption tower. The formaldehyde mixed gas is absorbed by the circulating liquid from top to bottom in the tower, and the remaining formaldehyde gas is discharged from the top of the tower and enters the secondary absorption tower for further absorption. The formaldehyde gas discharged from the secondary absorption tower directly enters the third-level absorption tower above the second tower for further absorption. After sufficient absorption, the remaining tail gas from the top of the tower containing trace formaldehyde, methanol, carbon monoxide, carbon dioxide, methane and a large amount of nitrogen, hydrogen and other gases is sent to the tail gas boiler for combustion, and finally the burned gas is discharged into the atmosphere at high altitude. The heat released during the combustion process can be used to generate 0.3Mpa saturated water vapor. The steam and water are separated in the steam drum, and the soft water is added from the pipe at the top of the three-level absorption tower after being measured by the rotor flowmeter. The finished product concentration is controlled by adjusting the amount of water added, and the steam is pumped into the steam distributor. The absorption liquid of the primary absorption tower and the secondary absorption tower are pumped out by a circulation pump, and after being cooled by a plate heat exchanger, continuous circulation spray absorption is carried out in the tower. The absorption liquid of the tertiary absorption tower is also pumped out by a circulation pump for continuous circulation spray absorption in the tower.

[0063] It can be concluded from the above that this embodiment selects a three-stage absorption tower as the water spray tower 14 to purify the exhaust gas after combustion through three-stage absorption, and the absorption liquid of each stage can be recycled, which saves resources and can also generate additional industrial steam.

[0064] In one embodiment of the present disclosure, the plurality of water seal grooves 11 include:

[0065] Dry water seal groove 111, wet water seal groove 112 and belt water seal groove 113.

[0066] The dry water seal groove 111, the wet water seal groove 112 and the belt water seal groove 113 are connected to each other. A control valve 114 is provided on the connecting pipeline formed between the dry water seal groove 111, the wet water seal groove 112 and the belt water seal groove 113.

[0067] In this embodiment, the plurality of water seal grooves 11 include: a dry water seal groove 111, a wet water seal groove 112 and a belt water seal groove 113. Among them, the dry water seal groove 11 is a common type of water seal groove 11, which is characterized in that there is no water in the water groove, but the exhaust gas is introduced into the water seal groove 11 through a sealed channel, and the purified gas is discharged through another sealed channel. The dry water seal groove 111 is suitable for treating exhaust gas containing flammable, explosive, toxic and other harmful gases. The wet water seal groove 112 is different from the dry water seal groove 111, and its water groove is filled with water. When the exhaust gas passes through the water groove, the harmful gas is absorbed and dissolved in the water, and the purified gas is discharged from the top of the water seal groove 11. The wet water seal groove 112 is suitable for treating exhaust gas containing acidic gas, harmful particulate matter, etc. The belt water seal groove 113 is a special type of water seal groove, which is characterized in that a belt conveyor is provided in the water groove, and the exhaust gas is purified by the water film on the belt conveyor. The belt-type water seal tank 113 is suitable for treating waste gas containing a large amount of particulate matter and sticky substances.

[0068] In this embodiment, the dry water seal groove 111, the wet water seal groove 112 and the belt water seal groove 113 are interconnected, and a control valve 114 is provided on the connecting pipeline formed between the dry water seal groove 111, the wet water seal groove 112 and the belt water seal groove 113. The control valve 114 is a switch valve, which is mainly used to control the inlet and outlet of the combustible tail gas. After the combustible tail gas enters the multiple water seal grooves 11, the control valve 114 is operated according to the composition of the harmful gas in the combustible tail gas to control the combustible tail gas to enter different water seal grooves 11 for filtering, so as to effectively filter the harmful gas that may affect the combustion, and avoid the occurrence of safety accidents due to the presence of flammable and explosive gases.

[0069] From the above, it can be concluded that this embodiment uses multiple water seal tanks 11 and control valves 114 of different models to accurately filter combustible exhaust gas containing different types of harmful gases, selects the combustible exhaust gas to enter different water seal tanks 11 according to the harmful gas components contained in the combustible exhaust gas, and comprehensively pre-treats the different combustible exhaust gases before combustion, effectively preventing various dangerous gases from entering the burner 12 and causing explosion accidents.

[0070] In one embodiment of the present disclosure, a safety valve 124 is provided at the inlet end of each water seal tank 11. The safety valve 124 is used to control the input flow rate of the combustible tail gas.

[0071] In this embodiment, a safety valve 124 is provided at the inlet end of each water seal groove 11. The safety valve 124 is a switch valve. In order to ensure the stagnation time of the combustible tail gas in the multiple water seal grooves 11 and effectively filter the harmful gas, it is necessary to effectively control the input flow rate of the combustible tail gas to prevent the filtering effect of the multiple water seal grooves 11 from being reduced due to the excessive input flow rate of the combustible tail gas. Therefore, the safety valve 124 is provided to control the input flow rate of the combustible tail gas, and the input flow rate of the combustible tail gas is controlled by controlling the switch of the safety valve 124 to prevent a large amount of combustible tail gas from continuously entering the multiple water seal grooves 11.

[0072] It can be concluded from the above that the present embodiment can effectively control the input flow rate of the combustible tail gas, thereby preventing harmful gases from directly entering the burner 12 from the source, and preventing the occurrence of explosion accidents.

[0073] In one embodiment of the present disclosure, the exhaust gas treatment system 10 further includes:

[0074] Blower 17. Blower 17 is used to transport air. Blower 17 is connected to the second pipeline of air distribution pipe 121.

[0075] In this embodiment, the tail gas treatment system 10 further includes: a blower 17. The blower 17 is a device for conveying air, and its main function is to provide continuous and sufficient air for the combustion of the combustible tail gas. Figure 2 is a flowchart of the exhaust gas treatment system provided by the embodiment of the present disclosure, such as Figure 2 As shown, the blower 17 is connected to the second pipe of the air distribution pipe 121, and the blower 17 provides air to the burner 12.

[0076] It can be concluded from the above that the present embodiment can provide continuous air to the burner 12 through the blower 17, thereby ensuring that sufficient air is fully mixed with the combustible exhaust gas, thereby improving the combustion efficiency.

[0077] In one embodiment of the present disclosure, the air distribution duct 121 further includes:

[0078] Natural gas pipeline. The natural gas pipeline is used to transport natural gas. The natural gas pipeline is connected to the combustion chamber 122.

[0079] In this embodiment, the air distribution pipe 121 also includes: a natural gas pipeline. The natural gas pipeline is used to transport natural gas, such as Figure 2 As shown, the natural gas pipeline is connected to the combustion chamber 122, and natural gas is continuously delivered to the combustion chamber 122 for combustion through the natural gas pipeline.

[0080] It can be concluded from the above that the present embodiment can ensure the continuity of the combustion process and improve the combustion efficiency by providing a natural gas pipeline connected to the combustion chamber 122 to deliver continuous natural gas to the combustion chamber 122.

[0081] In one embodiment of the present disclosure, the burner 12 further includes:

[0082] Igniter 117 and ignition device 118.

[0083] The igniter 117 is used to output high voltage electricity.

[0084] The ignition device 118 includes an ignition valve 1181 and an ignition gun 1182. The ignition valve 1181 is used to ignite the ignition gun 1182 and the combustible tail gas in the first pipeline. The ignition gun 1182 contains an ignition needle. The ignition needle is used to generate sparks from the high voltage electricity of the igniter.

[0085] In this embodiment, the burner 12 further includes: an igniter 117 and an ignition device 118. The igniter 117 is a transformer, which is mainly used to convert 220V AC into 10000V high voltage electricity. The ambient temperature of the combustion chamber 122 is required to be fixed below 50 degrees Celsius. Since the igniter 117 is filled with insulating asphalt, it is strictly forbidden to touch it within 5 minutes after starting to prevent electric shock.

[0086] In this embodiment, the ignition device 118 includes: an ignition valve 1181 and an ignition gun 1182. The ignition valve 1181 introduces a small amount of gas into the ignition gun to ignite the ignition gun and the combustible tail gas in the first pipe of the air distribution pipe 121. An ignition needle is arranged in the ignition gun 1182, and the ignition needle is used to generate sparks from the high voltage electricity of the igniter 117 to ignite the combustible tail gas. The ignition needle can ensure that sparks are generated in the discharge state, and the discharge gap is required to be 3-5mm, and can discharge continuously and intactly.

[0087] It can be concluded from the above that the present embodiment can achieve safe ignition through the igniter 117 and the ignition device 118. The ignition device 118 is arranged inside the burner 12, and through the high-voltage electric combustion spark, it can effectively prevent sparks from flying and causing safety accidents.

[0088] In one embodiment of the present disclosure, an induced draft fan 18 is further provided between the double rotary drying furnace 13 and the water spray tower 14 .

[0089] In this embodiment, an induced draft fan 18 is also provided between the double rotary drying furnace 13 and the water spray tower 14. The induced draft fan 18 is a gas extraction device, and its main function is to smoothly transport the exhaust gas treated by the double rotary drying furnace 13 to the water spray tower 14, thereby improving the gas transportation efficiency.

[0090] In one embodiment of the present disclosure, a tail gas treatment system 10 is provided.

[0091] In this embodiment, Figure 3 is a schematic diagram of an exhaust gas treatment system provided by an embodiment of the present disclosure, such as Figure 3 As shown, the exhaust gas treatment system 10 may include a single burner 12. The combustible exhaust gas enters the first pipe of the air distribution pipe 121 after being pre-treated by multiple water seal tanks 11, and enters the burner 12 for full combustion after being fully fused with other gases. The exhaust gas after combustion enters the double rotary drying furnace 13 through the gas pipeline 126, and after being dried by the double rotary drying furnace 13, it enters the water spray tower 14 through the induced draft fan 18 for purification, and finally enters the environmental protection treatment equipment 15. After meeting the emission standards, it is discharged into the atmospheric environment.

[0092] In one embodiment of the present disclosure, another exhaust gas treatment system 10 is provided.

[0093] In this embodiment, Figure 4 is a schematic diagram of another exhaust gas treatment system provided by an embodiment of the present disclosure, such as Figure 4 As shown, the exhaust gas treatment system 10 may include a plurality of burners 12, and the exhaust gas treatment process thereof is the same as the above process.

[0094] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A tail gas treatment system, characterized in that: include: Multiple water seal tanks, burners, double rotary drying furnaces, water spray towers and environmental protection treatment equipment; Each water seal tank comprises a gas delivery tank and a liquid delivery tank; the gas delivery tank is used to deliver combustible tail gas; the liquid delivery tank is used to collect condensed water in the combustible tail gas; The multiple water seal grooves are all connected to the burner; the models of the water seal grooves are different, and each water seal groove is used for preliminary filtering and conveying combustible tail gas; The burner comprises: an air distribution pipe, a combustion chamber, a gas regulating valve, a multi-head internal mixing combustion disk, a flame monitor and a gas transmission pipeline; The air distribution pipe comprises a plurality of air supply pipes; the plurality of air supply pipes are all connected to the combustion chamber; the plurality of water seal grooves are all connected to the first pipe of the air distribution pipe; the gas regulating valve is arranged on the first pipe of the air distribution pipe for adjusting the flow of combustible tail gas; the first pipe of the air distribution pipe is used for inputting combustible tail gas; the multi-head internal mixing combustion disk and the flame monitor are both arranged inside the combustion chamber; the combustion chamber is connected to the gas supply pipe; The gas pipeline is connected to the double rotary drying furnace; the double rotary drying furnace is connected to the water spray tower; the water spray tower is connected to the environmental protection treatment equipment.

2. The exhaust gas treatment system according to claim 1, characterized in that: A concentration sensor is also provided between the double rotary drying furnace and the water spray tower; the tail gas treatment system further comprises: a controller; The concentration sensor is connected to the controller; The controller is connected to the flow control valve in the water spray tower, and is configured to control the spraying volume of the water spray tower according to the concentration data collected by the concentration sensor.

3. The exhaust gas treatment system according to claim 1, characterized in that: The water spray tower is a three-stage absorption tower.

4. The exhaust gas treatment system according to claim 1, characterized in that: The plurality of water seal grooves include: Dry water seal tank, wet water seal tank and belt water seal tank; The dry water seal groove, the wet water seal groove and the belt water seal groove are connected to each other; a control valve is arranged on the connecting pipeline formed among the dry water seal groove, the wet water seal groove and the belt water seal groove.

5. The exhaust gas treatment system according to claim 1, characterized in that: A safety valve is provided at the inlet end of each water seal tank; the safety valve is used to control the input flow of combustible tail gas.

6. The exhaust gas treatment system according to claim 1, characterized in that: Also includes: Blower; the blower is used to transport air; the blower is connected to the second pipeline of the air distribution pipe.

7. The exhaust gas treatment system according to claim 1, characterized in that: The air distribution duct also includes: A natural gas pipeline; the natural gas pipeline is used to transport natural gas; the natural gas pipeline is connected to the combustion chamber.

8. The exhaust gas treatment system according to claim 1, characterized in that: The burner also includes: Igniters and ignition devices; The igniter is used to output high voltage electricity; The ignition device comprises: an ignition valve and an ignition gun; the ignition valve is used to ignite the ignition gun and the combustible tail gas in the first pipeline; the ignition gun contains an ignition needle; the ignition needle is used to generate sparks from the high voltage electricity of the igniter.

9. The exhaust gas treatment system according to claim 1, characterized in that: An induced draft fan is also provided between the double rotary drying furnace and the water spray tower.

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