Tail gas treatment system of sulfur resource utilization device

Abstract

The application discloses a tail gas treatment system of a sulfur resource device, which comprises an adsorption tower, a regeneration tower, a sulfur resource device and a cooling water pipeline, a main flue gas inlet pipeline is arranged on the adsorption tower, a flue gas automatic monitoring system is arranged on the main flue gas outlet of the adsorption tower, a cooling air inlet pipeline is arranged on the regeneration tower, the cooling air outlet of the regeneration tower is connected to a cooling air discharge pipeline and a conveying pipeline, the desorption gas outlet of the regeneration tower is connected to the inlet of the sulfur resource device, the outlet of the sulfur resource device is connected to the main flue gas inlet pipeline, the cooling air conveying pipeline is connected to the main flue gas inlet pipeline, a conveying valve and an atomizing device are sequentially arranged, and the cooling water pipeline is connected to the atomizing device and connected to the cooling air conveying pipeline. The tail gas of the sulfur resource device is discharged into the adsorption tower to purify the tail gas, high-concentration SO3 in the tail gas is efficiently treated through atomized cooling water, and the tail gas of the sulfur resource device under different operation conditions can be treated.

Description

TECHNICAL FIELD

[0001] The present application relates to a flue gas pollutant treatment system, in particular to a tail gas treatment system of a sulfur resource utilization device. BACKGROUND

[0002] The carbon-based catalytic flue gas multi-pollutant control technology can effectively remove SO x , NO x and soot and other pollutants in flue gas, achieving standard flue gas emission. Through regeneration and utilization of the carbon-based catalyst, catalyst consumption can be effectively reduced, thereby reducing operating costs. The desorption gas generated during the regeneration of the carbon-based catalyst contains high concentrations of SO2, which can be further recovered for resource utilization, improving the economic efficiency of the process device operation.

[0003] In practical applications, the tail gas formed after the desorption gas is resourcefully utilized still contains a certain concentration of SO2 gas, which needs to be purified by a tail gas purification device before being discharged into the atmosphere. In addition, the SO2 concentration in the desorption gas generated during the start-up or shutdown of the carbon-based catalytic multi-pollutant treatment device usually cannot meet the requirements of sulfur resource utilization and needs to be treated separately.

[0004] Generally, a tail gas treatment device can be provided in the sulfur resource utilization device to meet the SO2 treatment requirements, but this method has the following disadvantages:

[0005] (1) The provision of a tail gas purification device increases the process equipment and process flow, improves the device construction and operation cost investment, and increases the system complexity;

[0006] (2) The amount of SO2 in the tail gas that needs to be treated under normal operating conditions and during device failure or during the start-up and shutdown of the carbon-based catalytic multi-pollutant treatment device varies greatly, increasing the design and operation control difficulty of the tail gas treatment device. In addition, for resource utilization process devices that need to convert SO2 into SO3, if the converted SO3 cannot be absorbed in the process device due to failure, it will further increase the difficulty of tail gas treatment.

[0007] In view of the above problems, the present application provides a tail gas treatment system of a sulfur resource utilization device. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a tail gas treatment system of a sulfur resource utilization device, which can effectively treat the tail gas of the sulfur resource utilization device under different operating conditions, has a simple structure and low operation control difficulty.

[0009] In order to solve the above technical problems, the present application provides a tail gas treatment system of a sulfur resource device, characterized in that it comprises an adsorption tower, a regeneration tower, a sulfur resource device and a cooling water pipeline, a main flue gas inlet pipeline is arranged on the adsorption tower, a booster fan is arranged on the main flue gas inlet pipeline, a flue gas automatic monitoring system is arranged on the main flue gas outlet of the adsorption tower, a cooling air inlet pipeline is arranged on the regeneration tower, the cooling air outlet of the regeneration tower is connected to a cooling air discharge pipeline provided with an outlet valve and a cooling air conveying pipeline for conveying cooling air to the adsorption tower, the desorption gas outlet of the regeneration tower is connected to the inlet of the sulfur resource device through a desorption gas pipeline, the outlet of the sulfur resource device is connected to the main flue gas inlet pipeline through a tail gas pipeline, and the cooling air conveying pipeline is connected to the main flue gas inlet pipeline, a conveying valve and an atomizing device are arranged on the cooling air conveying pipeline in sequence, and the cooling water pipeline is connected to the atomizing device and connected to the cooling air conveying pipeline.

[0010] Preferably, the connection point of the cooling air conveying pipeline on the main flue gas inlet pipeline is between the booster fan and the inlet of the adsorption tower.

[0011] More preferably, the tail gas pipeline is connected to the main flue gas pipeline between the connection point of the cooling air conveying pipeline on the main flue gas inlet pipeline and the inlet of the adsorption tower.

[0012] Further, a temperature measuring device is arranged on the main flue gas inlet pipeline, and the temperature measuring device is arranged between the inlet of the adsorption tower and the connection point of the tail gas pipeline on the main flue gas inlet pipeline.

[0013] Further, a cold air fan is arranged on the cooling air inlet pipeline.

[0014] Preferably, the outlet valve and / or the conveying valve are manually adjustable valves or electromagnetic adjustable valves.

[0015] Preferably, the cold air outlet pipeline is connected to the cooling air conveying pipeline to be connected to the cooling air outlet through the cooling air conveying pipeline, and the connection point of the cold air outlet pipeline on the cooling air conveying pipeline is between the cooling air outlet and the conveying valve.

[0016] Further, a flow regulating valve is arranged on the cooling water pipeline.

[0017] Further, a desorption gas regulating valve is arranged on the desorption gas pipeline.

[0018] Preferably, the desorption gas regulating valve is a V-shaped ball valve.

[0019] By the technical scheme, the application has the following beneficial effects:

[0020] When the regeneration tower and the sulfur resource device are in normal operation, the tail gas of the sulfur resource device can be discharged into the adsorption tower through the tail gas pipeline for treatment, without the need to additionally increase a tail gas treatment device, and when the regeneration tower is in a shutdown or fault state, the desorbed gas in the regeneration tower enters the sulfur resource device through the desorbed gas pipeline, and the requirement for treating high-concentration SO2 tail gas can still be met. When the sulfur resource device fails at the same time, high-concentration SO3 in the tail gas can be efficiently treated by spraying atomized cooling water, so as to prevent the emission of pollutants from exceeding the standard.

[0021] Other advantages of the application and technical effects of the preferred embodiments will be further described in the specific embodiments below. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of a tail gas treatment system of a sulfur resource device in the application.

[0023] REFERENCE SIGNS

[0024] 1 adsorption tower 110 main flue gas inlet pipeline

[0025] 111 booster fan 112 flue gas automatic monitoring system

[0026] 2 regeneration tower 210 desorbed gas pipeline

[0027] 212 desorbed gas outlet 211 regulating valve

[0028] 220 cooling air inlet pipeline 221 cooling air fan

[0029] 220-1 cooling air outlet pipeline 222 outlet valve

[0030] 220-2 cooling air conveying pipeline 223 conveying valve

[0031] 224 cooling air outlet 3 sulfur resource device

[0032] 310 tail gas pipeline 400 cooling water pipeline

[0033] 401 flow regulating valve 402 atomizing device

[0034] 403 temperature measuring device DETAILED DESCRIPTION

[0035] The specific embodiments of the application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the application, and are not used to limit the application.

[0036] As described above, in the description of the present application, it should be noted that the terms "upper", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the invention can be understood according to the specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict between them.

[0039] As Figure 1 shown, the tail gas treatment system of the sulfur resource utilization device of the present application comprises an adsorption tower 1, a regeneration tower 2, a sulfur resource utilization device 3 and a cooling water pipeline 400, the adsorption tower 1 is provided with a main flue gas inlet pipeline 110, the main flue gas inlet pipeline 110 is provided with a booster fan 111, the main flue gas outlet of the adsorption tower 1 is provided with a flue gas automatic monitoring system 112, the regeneration tower 2 is provided with a cooling air inlet pipeline 220, the cooling air outlet 224 of the regeneration tower 2 is connected to a cooling air discharge pipeline 220-1 provided with an outlet valve 222 and a cooling air conveying pipeline 220-2 for conveying cooling air to the adsorption tower 1, the desorption gas outlet 212 of the regeneration tower 2 is connected to the inlet of the sulfur resource utilization device 3 through a desorption gas pipeline 210, the outlet of the sulfur resource utilization device 3 is connected to the main flue gas inlet pipeline 110 through a tail gas pipeline 310, and the cooling air conveying pipeline 220-2 is connected to the main flue gas inlet pipeline 110, the cooling air conveying pipeline 220-2 is provided with a conveying valve 223 and an atomizing device 402 in sequence, the cooling water pipeline 400 is connected to the atomizing device 402 and connected to the cooling air conveying pipeline 220-2.

[0040] In the basic technical solution, the main flue gas needing to remove pollutants enters the adsorption tower 1 from the main flue gas inlet pipeline 110 after being pressurized by the booster fan 111, and the carbon-based catalyst in the adsorption tower 1 removes the pollutants from the main flue gas. The main flue gas outlet of the adsorption tower 1 is provided with a flue gas automatic monitoring system 112, and the main flue gas after pollutant removal is discharged to the atmosphere through the main flue gas outlet. The carbon-based catalyst after adsorbing pollutants enters the regeneration tower 2 for regeneration, and after the regeneration of the carbon-based catalyst, the cooled air heat exchange is discharged from the regeneration tower 2 into the adsorption tower 1 to continue the adsorption. The desorbed gas generated in the regeneration tower 2 enters the sulfur resource device 3 through the desorbed gas pipeline 210, and the high-concentration SO2 in the desorbed gas is resourceized and recycled in the sulfur resource device. The tail gas discharged from the sulfur resource device is discharged to the main flue gas inlet pipeline 110 through the tail gas pipeline 310, and is further carried by the gas flow in the main flue gas inlet pipeline 110 to the adsorption tower 1 to continue the adsorption removal.

[0041] In the above basic scheme, when the flue gas automatic monitoring system 112 monitors that the pollutant concentration of the main flue gas meets the emission requirements, the delivery valve 223 is closed and the outlet valve 222 is opened, and the cooled air after heat exchange is discharged to the atmosphere through the cooled air discharge pipeline 220-1, and the outlet valve 222 can control the flow of the cooled air after heat exchange discharged to the atmosphere.

[0042] When the booster fan 111 is in the closed state and the sulfur resource device 3 is normally running, the delivery valve 223 is opened and the outlet valve 222 is closed, the cooled air after heat exchange enters the main flue gas inlet pipeline 110 and flows to the adsorption tower 1, and at the same time, the tail gas discharged from the sulfur resource device 3 is blown to the adsorption tower 1, and the SO2 in the tail gas discharged from the sulfur resource device 3 is removed by adsorption in the adsorption tower 1. The flow of the cooled air after heat exchange can effectively prevent the corrosion problem caused by the diffusion of the tail gas of the sulfur resource device 3 in the flue space. Since the temperature of the cooled air after heat exchange is relatively high, the corrosion caused by the condensation of the acid gas in the tail gas of the sulfur resource device 3 can be further avoided.

[0043] When the booster fan 111 is in the closed state and the sulfur resource device 3 suddenly fails, a large amount of SO2 will be discharged. For the resourceization process that needs to convert SO2 into SO3, the gas may also contain a high concentration of SO3. Since the adsorption capacity of the carbon-based catalyst for dry SO2 and SO3, especially SO3, is weak, and the humidity of the cooled air is very low, it is easy to cause the SO3 concentration in the outlet flue gas of the adsorption tower 1 to exceed the standard. At this time, the humidity of the cooled air after heat exchange can be increased by opening the atomizing device 402, so as to further increase the humidity of the gas in the main flue gas inlet pipeline 110, improve the SO2 and SO3 removal capacity of the carbon-based catalyst, and prevent the pollutant concentration of the gas at the main flue gas outlet of the adsorption tower 1 from exceeding the standard.

[0044] On the basis of the above scheme, the connecting point of the cooling air delivery pipeline 220-2 on the main flue gas inlet pipeline 110 is arranged between the booster fan 111 and the inlet of the adsorption tower 1, so that when the booster fan 111 stops working, the gas in the main flue gas inlet pipeline 110 can be blown to the adsorption tower 1 by the cooled air for adsorption removal.

[0045] Preferably, the connecting point of the tail gas pipeline 310 on the main flue gas inlet pipeline 110 is arranged between the access point of the cooling air delivery pipeline 220-2 on the main flue gas inlet pipeline 110 and the inlet of the adsorption tower 1, which can prevent the tail gas of the sulfur resource utilization device 3 from diffusing in the main flue gas inlet pipeline 110 to cause corrosion problems.

[0046] Further, the main flue gas inlet pipeline 110 is provided with a temperature measuring device 403, and the temperature measuring device 403 is arranged between the inlet of the adsorption tower 1 and the connecting point of the tail gas pipeline 310 on the main flue gas inlet pipeline 110. The temperature measuring device 403 is used to measure the temperature of the gas in the main flue gas inlet pipeline 110. When the measured value of the temperature measuring device 403 is higher than the upper limit value, the atomizing device 402 is opened to spray water to reduce the temperature of the cooling air, so as to prevent high-temperature gas from entering the adsorption tower 1 to make the temperature in the adsorption tower 1 too high. When the measured value of the temperature measuring device 403 is lower than the lower limit value, the atomizing device 402 is closed to prevent the condensation of water vapor in the gas to cause catalyst dust agglomeration. Preferably, the upper and lower limit temperatures of the measured value of the temperature measuring device 403 are 135℃ and 110℃, respectively.

[0047] Further, the cooling air inlet pipeline 220 is provided with a cooling air fan 221, which can increase the cooling air inlet pressure to overcome the resistance of the regeneration tower 2 to the cooling air and the flue gas pressure in the main flue gas inlet pipeline 110. The outlet valve 222 and / or the delivery valve 223 are manually adjustable valves or electromagnetic adjustable valves, so that the outlet valve 222 and the delivery valve 223 can be manually or automatically adjusted.

[0048] Preferably, the cooling air outlet pipeline 220-1 is connected to the cooling air delivery pipeline 220-2 to be connected to the cooling air outlet 224 through the cooling air delivery pipeline 220-2. The connecting point of the cooling air outlet pipeline 220-1 on the cooling air delivery pipeline 220-2 is between the cooling air outlet 224 and the delivery valve 223, so that the flow of the cooled air discharged to the atmospheric environment or entering the main flue gas inlet pipeline 110 can be controlled by the opening degree cooperation between the outlet valve 222 and the delivery valve 223.

[0049] Of course, the atomization device 402 can also be arranged in the main flue gas pipeline 110, and the tail gas pipeline 310 can be connected to the heat-exchanged cooling air pipeline 220-2 first, so that the tail gas of the sulfur resource utilization device is mixed with the heat-exchanged cooling air and then enters the main flue gas pipeline. The specific arrangement can be optimized according to the actual engineering situation, as long as the characteristic requirements in the implementation case can be met.

[0050] Further, the cooling water pipeline 400 is provided with a flow regulating valve 401, and when the SO2 and SO3 concentrations measured by the flue gas automatic monitoring system 112 exceed the set upper limit value, the opening of the flow regulating valve 401 is increased, so that the flow of the cooling water is increased.

[0051] Further, the desorption gas pipeline 210 is provided with a desorption gas regulating valve 211, which is preferably a V-type ball valve and can adjust the pressure in the regeneration tower 2.

[0052] In order to better understand the technical solutions and advantages of the present application, the following will be described in combination with relatively comprehensive technical features.

[0053] With reference to Figure 1 The relatively comprehensive preferred embodiment of the present application comprises an adsorption tower 1, a regeneration tower 2, a sulfur resource utilization device 3 and a cooling water pipeline 400.

[0054] The adsorption tower 1 is provided with a main flue gas inlet pipeline 110, and the main flue gas inlet pipeline 110 is provided with a booster fan 111. The main flue gas outlet of the adsorption tower 1 is provided with a flue gas automatic monitoring system 112.

[0055] The regeneration tower 2 is provided with a cooling air inlet pipeline 220, and the cooling air inlet pipeline 220 is provided with a cooling air fan 221. The cooling air outlet 224 of the regeneration tower 2 is connected to a cooling air conveying pipeline 220-2 provided with a conveying valve 223. The cooling air outlet pipeline 220-1 is connected to the cooling air conveying pipeline 220-2, and the connection point of the cooling air outlet pipeline 220-1 on the cooling air conveying pipeline 220-2 is between the cooling air outlet 224 and the conveying valve 223. The desorption gas outlet 212 of the regeneration tower 2 is connected to the inlet of the sulfur resource utilization device 3 through a desorption gas pipeline 210. The desorption gas pipeline 210 is provided with a desorption gas regulating valve 211, which is a gas pressure regulating valve. The outlet valve 222 and / or the conveying valve 223 are manual regulating valves or electromagnetic regulating valves.

[0056] The outlet of the sulfur resource device 3 is connected to the main flue gas inlet pipe 110 through the tail gas pipe 310, and the cooling air delivery pipe 220-2 is connected to the main flue gas inlet pipe 110, and the connection point of the cooling air delivery pipe 220-2 on the main flue gas inlet pipe 110 is between the booster fan 111 and the inlet of the adsorption tower 1. The delivery valve 223 and the atomizing device 402 are sequentially arranged on the cooling air delivery pipe 220-2, the cooling water pipe 400 is connected to the atomizing device 402 and connected to the cooling air delivery pipe 220-2, and the flow regulating valve 401 is arranged on the cooling water pipe 400.

[0057] The temperature measuring device 403 is arranged on the main flue gas inlet pipe 110, and the temperature measuring device 403 is arranged between the inlet of the adsorption tower 1 and the connection point of the tail gas pipe 310 on the main flue gas inlet pipe 110.

[0058] According to the above technical scheme, when the system is normally running, the outlet valve 222 is opened, the delivery valve 223 is closed, and the cooling air after heat exchange is discharged to the atmosphere. The tail gas of the sulfur resource device 3 enters the main flue gas inlet pipe 110 through the tail gas pipe 310, and enters the adsorption tower 1 after mixing with the flue gas, and the SO2 therein is removed by adsorption together with the SO2 in the flue gas.

[0059] When the adsorption tower 1 is in the starting stage, the shutdown stage or the system fault state, the booster fan 111 is in the closed state, at this time, the cooling fan 221 is kept in the running state, at the same time, the delivery valve 223 is opened, the outlet valve 222 is closed, the cooling air after heat exchange enters the main flue gas inlet pipe 110 and flows to the adsorption tower 1, at the same time, the tail gas discharged from the sulfur resource device 3 is blown to the adsorption tower 1, and the SO2 in the tail gas is removed by adsorption in the adsorption tower 1. The cooling air flow after heat exchange can effectively prevent the corrosion problem caused by the diffusion of the tail gas of the sulfur resource device in the flue gas space, and since the cooling air after heat exchange has a high temperature, the corrosion caused by the condensation of the acid gas in the tail gas can be further avoided. When the measured value of the temperature measuring device 403 is higher than the upper limit value, the atomizing device 402 is opened to spray water to reduce the temperature of the cooling air, so as to prevent the high-temperature gas from entering the adsorption tower 1 to cause the over-temperature problem, and when the measured value of the temperature measuring device 403 is lower than the lower limit value, the atomizing device 402 is closed to prevent the condensation of water vapor in the gas to cause the catalyst dust to be bonded. The upper and lower limit temperatures of the measured value of the temperature measuring device 403 are preferably 135°C and 110°C, respectively.

[0060] When the booster fan 111 is in the closed state and the sulfur resource device 3 suddenly fails, a large amount of SO2 will be discharged, and for the resource processing technology that needs to convert SO2 into SO3, the gas may also contain a high concentration of SO3. Because the adsorption capacity of the carbon-based catalyst for dry SO2 and SO3, especially SO3, is weak, and the humidity of the cooling air is very low, it is easy to cause the SO3 concentration in the flue gas at the outlet of the adsorption tower 1 to exceed the standard. At this time, the humidity of the cooling air after heat exchange can be increased by adjusting the flow regulating valve 401, thereby further increasing the humidity of the gas in the main flue gas inlet pipe 110, improving the SO2 and SO3 removal capacity of the carbon-based catalyst, and preventing the pollutant concentration in the gas at the main flue gas outlet of the adsorption tower 1 from exceeding the standard.

[0061] As can be seen from the above description, the present application has the advantages that: the cooling air outlet 224 of the regeneration tower 2 is connected with the main flue gas pipe through a cooling air conveying pipe 220-2, so that the cooling air after heat exchange can enter the main flue gas pipe 110 and flow towards the adsorption tower 1. The flow of cooling air after heat exchange can effectively prevent the corrosion problem caused by the diffusion of sulfur resource device tail gas in the flue space. Since the temperature of the cooling air after heat exchange is relatively high, the condensation of acidic gas in the tail gas can be further avoided to cause corrosion. The cooling water pipe 400 is connected with the cooling air conveying pipe 220-2 through the atomizing device 402, so that when the temperature of the cooling air after heat exchange is too high, the cooling air can be sprayed to reduce the temperature, preventing high-temperature gas from entering the adsorption tower 1 to cause over-temperature problems, and improving the SO2 and SO3 removal capacity of the carbon-based catalyst, preventing the pollutant concentration in the gas at the outlet of the carbon-based catalyst multi-pollutant co-processing device from exceeding the standard. The atomizing device 402 can also be closed when the temperature is too low to prevent the condensation of water vapor in the gas to cause catalyst dust adhesion. In addition, the sulfur resource device tail gas treatment system of the present application has simple structure and low operation control difficulty, reduces the construction and operation cost investment, and has universal practicality and technical application value.

[0062] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0063] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present application.

Claims

1. A sulfur resource utilization device tail gas treatment system, characterized in that, The device comprises an adsorption tower (1), a regeneration tower (2), a sulfur resource device (3) and a cooling water pipeline (400), the adsorption tower (1) is provided with a main flue gas inlet pipeline (110), the main flue gas inlet pipeline (110) is provided with a booster fan (111), the main flue gas outlet of the adsorption tower (1) is provided with a flue gas automatic monitoring system (112), the regeneration tower (2) is provided with a cooling air inlet pipeline (220), the cooling air outlet (224) of the regeneration tower (2) is connected to a cold air outlet pipeline (220-1) provided with an outlet valve (222) and a cooling air conveying pipeline (220-2) for conveying cooling air to the adsorption tower (1), the desorption gas outlet (212) of the regeneration tower (2) is connected to the inlet of the sulfur resource device (3) through a desorption gas pipeline (210), the desorption gas pipeline (210) is provided with a desorption gas regulating valve (211), the outlet of the sulfur resource device (3) is connected to the main flue gas inlet pipeline (110) through a tail gas pipeline (310), and the cooling air conveying pipeline (220-2) is connected to the main flue gas inlet pipeline (110), the cooling air conveying pipeline (220-2) is sequentially provided with a conveying valve (223) and an atomizing device (402), the cooling water pipeline (400) is connected to the atomizing device (402) and connected to the cooling air conveying pipeline (220-2); wherein, The connecting point of the cooling air conveying pipeline (220-2) on the main flue gas inlet pipeline (110) is between the booster fan (111) and the inlet of the adsorption tower (1), and the connecting point of the cooling air conveying pipeline (220-2) on the main flue gas inlet pipeline (110) is connected with the tail gas pipeline (310) between the inlet of the adsorption tower (1); The cold air outlet pipeline (220-1) is connected to the cooling air conveying pipeline (220-2) to be connected to the cooling air outlet (224) through the cooling air conveying pipeline (220-2), and the connecting point of the cold air outlet pipeline (220-1) on the cooling air conveying pipeline (220-2) is between the cooling air outlet (224) and the conveying valve (223).

2. The sulfur resource recovery unit tail gas treatment system of claim 1, wherein, The main flue gas inlet pipeline (110) is provided with a temperature measuring device (403), and the temperature measuring device (403) is arranged between the inlet of the adsorption tower (1) and the connecting point of the tail gas pipeline (310) on the main flue gas inlet pipeline (110).

3. The sulfur resource recovery unit tail gas treatment system of claim 1, wherein, The cooling air inlet pipeline (220) is provided with a cold air fan (221).

4. The sulfur resource recovery unit tail gas treatment system of claim 1, wherein, The outlet valve (222) and / or the conveying valve (223) are manually adjusted valves or electromagnetic regulating valves.

5. The sulfur resource utilization plant tail gas treatment system of any one of claims 1 to 4, wherein, The cooling water pipeline (400) is provided with a flow regulating valve (401).

6. The sulfur resource recovery unit tail gas treatment system of any one of claims 1 to 4, wherein, The desorption gas regulating valve (211) is a V-shaped ball valve.

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