High-quality coke oven gas purification system

Abstract

The utility model provides a high-quality coke oven gas purification system which is characterized in that a primary cooler is connected with an air blower through an electrical tar precipitator pipeline, the air blower is connected with an ammonia washing device through a primary wet desulphurization device pipeline, the ammonia washing device is connected with a benzene elution device through an activated carbon desulphurization device pipeline, and the benzene elution device is connected with an organic sulfur hydrolysis device through an activated carbon desulphurization device pipeline. The organic sulfur hydrolysis device is connected with the second-stage wet desulphurization device through a pipeline, the first-stage wet desulphurization device and the second-stage wet desulphurization device are both selected from one of an HPF desulphurization device, a PDS desulphurization device and an enhanced ammonia-sulfur circulation desulphurization device, and the first-stage wet desulphurization device and the second-stage wet desulphurization device can also be vacuum carbonate desulphurization devices and are arranged behind the benzene elution device. The activated carbon desulfurizer is arranged in front. The device can effectively purify the coke oven gas, the content of hydrogen sulfide in the desulfurized gas is less than 50mg / Nm < 3 >, and the content of organic sulfur is less than 10mg / Nm < 3 >.

Description

Technical Field

[0001] The utility model relates to the technical field of coking, in particular to the technical field of coke oven gas purification, and specifically refers to a high-quality coke oven gas purification system. Background Art

[0002] The coal used for coking contains hundreds of components under complex geological conditions. Therefore, the composition of raw coke oven gas is very complex. The function of the gas purification device is to remove the main impurities in the raw gas according to the requirements of various users for gas quality and the requirements of national environmental protection standards. Generally, it includes gas cooling and tar-ammonia water separation, gas pumping, removal of naphthalene, hydrogen sulfide, ammonia, crude benzene in the gas, and the final purification of the gas.

[0003] The existing gas desulfurization often adopts the wet desulfurization process. Commonly used are the HPF desulfurization process, the PDS desulfurization process, and the enhanced ammonia-sulfur circulation desulfurization process. After the first two desulfurizations, the hydrogen sulfide content in the gas is not more than 200 mg / m 3 , and the latter is the optimized AS desulfurization process. After treatment, the hydrogen sulfide content in the gas can meet the requirement of not more than 100 mg / m 3 . However, these methods only remove the inorganic sulfur in the gas and have basically no removal effect on the organic sulfur in the gas. Therefore, the sulfur dioxide content in the flue gas generated after direct combustion and emission into the tubular furnace cannot meet the standard emission. Therefore, it is necessary to further remove the inorganic sulfur and organic sulfur in the gas after wet desulfurization.

[0004] Therefore, in order to meet the requirements of ultra-low emissions of iron and steel enterprises, it is necessary to propose a high-quality coke oven gas purification system to desulfurize the coke oven gas from the source and meet the requirements of standard emission of the tubular furnace. Content of the Utility Model

[0005] In order to overcome the above-mentioned disadvantages in the prior art, an object of the utility model is to provide a high-quality coke oven gas purification system, which can effectively purify the coke oven gas. After desulfurization, the hydrogen sulfide content in the gas is less than 50 mg / Nm 3 , and the organic sulfur content is less than 10 mg / Nm 3 , which is suitable for large-scale popularization and application.

[0006] To achieve the above object, in the first aspect of the present utility model, a high-quality coke oven gas purification system is provided, which includes a condensation and blast unit and a primary gas desulfurization unit. The condensation and blast unit includes a primary cooler, an electrostatic tar precipitator, and a blower. The primary gas desulfurization unit includes a first-stage wet desulfurization device, an ammonia washing device, and a benzene washing and stripping device. The first-stage wet desulfurization device is selected from one of the HPF desulfurization device, the PDS desulfurization device, and the enhanced ammonia-sulfur cycle desulfurization device. The primary cooler is connected to the blower through the electrostatic tar precipitator pipeline. The blower is connected to the ammonia washing device through the first-stage wet desulfurization device pipeline. The ammonia washing device pipeline is connected to the benzene washing and stripping device. The characteristic is that the high-quality coke oven gas purification system further includes a refined gas desulfurization unit, wherein:

[0007] The refined gas desulfurization unit includes an activated carbon desulfurization device, an organic sulfur hydrolysis device, and a second-stage wet desulfurization device. The benzene washing and stripping device is connected to the organic sulfur hydrolysis device through the activated carbon desulfurization device pipeline. The organic sulfur hydrolysis device pipeline is connected to the second-stage wet desulfurization device. The second-stage wet desulfurization device is selected from one of the HPF desulfurization device, the PDS desulfurization device, and the enhanced ammonia-sulfur cycle desulfurization device.

[0008] Preferably, the first-stage wet desulfurization device and the second-stage wet desulfurization device are the same.

[0009] Preferably, the condensation and blast unit further includes a gas pipeline and an ammonia water spraying and cooling device. The gas pipeline is connected to the primary cooler. The ammonia water spraying and cooling device is arranged in the gas pipeline for spraying and cooling the raw coke oven gas in the gas pipeline with ammonia water.

[0010] Preferably, the primary gas desulfurization unit further includes a pre-cooling tower. The blower is connected to the first-stage wet desulfurization device through the pre-cooling tower pipeline.

[0011] Preferably, the primary gas desulfurization unit further includes a final cooling tower. The ammonia washing device is connected to the benzene washing and stripping device through the final cooling tower pipeline.

[0012] Preferably, the refined gas desulfurization unit further includes a pre-heater. The activated carbon desulfurization device is connected to the organic sulfur hydrolysis device through the pre-heater pipeline.

[0013] In the second aspect of the present utility model, a high-quality coke oven gas purification system is provided, which includes a condensation and blast unit and a primary gas desulfurization unit. The condensation and blast unit includes a primary cooler, an electrostatic tar precipitator, and a blower. The primary gas desulfurization unit includes a first-stage wet desulfurization device, an ammonia washing device, and a benzene washing and stripping device. The first-stage wet desulfurization device is a vacuum carbonate desulfurization device. The primary cooler is connected to the blower through the electrostatic tar precipitator pipeline. The blower is connected to the benzene washing and stripping device through the ammonia washing device pipeline. The benzene washing and stripping device pipeline is connected to the first-stage wet desulfurization device. Its feature is that the high-quality coke oven gas purification system further includes a fine gas desulfurization unit, where:

[0014] The fine gas desulfurization unit includes an activated carbon desulfurization device, an organic sulfur hydrolysis device, and a second-stage wet desulfurization device. The first-stage wet desulfurization device is connected to the organic sulfur hydrolysis device through the activated carbon desulfurization device pipeline. The organic sulfur hydrolysis device pipeline is connected to the second-stage wet desulfurization device. The second-stage wet desulfurization device is a vacuum carbonate desulfurization device.

[0015] Preferably, the primary gas desulfurization unit further includes a pre-cooling tower. The blower is connected to the ammonia washing device through the pre-cooling tower pipeline.

[0016] Preferably, the primary gas desulfurization unit further includes a final cooling tower. The ammonia washing device is connected to the benzene washing and stripping device through the final cooling tower pipeline.

[0017] Preferably, the fine gas desulfurization unit further includes a pre-heater. The activated carbon desulfurization device is connected to the organic sulfur hydrolysis device through the pre-heater pipeline.

[0018] The beneficial effects of the present utility model mainly lie in:

[0019] The condensation and blast unit of the high-quality coke oven gas purification system of the present utility model includes a primary cooler, an electrostatic tar precipitator, and a blower. The primary gas desulfurization unit includes a first-stage wet desulfurization device, an ammonia washing device, and a benzene washing and stripping device. The primary cooler is connected to the blower through the electrostatic tar precipitator pipeline. The blower is connected to the ammonia washing device through the first-stage wet desulfurization device pipeline. The ammonia washing device pipeline is connected to the benzene washing and stripping device. The fine gas desulfurization unit includes an activated carbon desulfurization device, an organic sulfur hydrolysis device, and a second-stage wet desulfurization device. The benzene washing and stripping device is connected to the organic sulfur hydrolysis device through the activated carbon desulfurization device pipeline. The organic sulfur hydrolysis device pipeline is connected to the second-stage wet desulfurization device. The first-stage and second-stage wet desulfurization devices are each selected from one of the HPF desulfurization device, PDS desulfurization device, and enhanced ammonia-sulfur circulation desulfurization device. The first-stage and second-stage wet desulfurization devices can also be vacuum carbonate desulfurization devices, arranged after the benzene washing and stripping device and before the activated carbon desulfurization device. Therefore, it can effectively purify the coke oven gas, and the hydrogen sulfide content in the desulfurized gas is less than 50 mg / Nm 3, the organic sulfur content is less than 10 mg / Nm 3 , and it is suitable for large-scale popularization and application.

[0020] These and other objects, features and advantages of the present utility model are fully embodied by the following detailed description and drawings, and can be realized by the means, devices and their combinations specifically pointed out in the content of the utility model. Description of the Drawings

[0021] Figure 1 is a schematic block diagram of the structure of the first specific embodiment of the high-quality coke oven gas purification system of the present utility model.

[0022] Figure 2 is a schematic block diagram of the structure of the second specific embodiment of the high-quality coke oven gas purification system of the present utility model. Detailed Embodiments

[0023] In order to be able to more clearly understand the technical content of the present utility model, the following specific embodiments are hereby given for detailed description.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0025] Please refer to Figure 1 As shown, in the first specific embodiment of the present utility model, the high-quality coke oven gas purification system of the present utility model includes a condensation and blast unit, a primary gas desulfurization unit and a fine gas desulfurization unit, wherein:

[0026] The condensation and blast unit includes a primary cooler, an electrostatic tar precipitator and a blower. The primary gas desulfurization unit includes a first-stage wet desulfurization device, an ammonia washing device and a benzene washing and stripping device. The first-stage wet desulfurization device is selected from one of the HPF desulfurization device, the PDS desulfurization device and the enhanced ammonia-sulfur circulation desulfurization device. The primary cooler is connected to the blower through the electrostatic tar precipitator pipeline. The blower is connected to the ammonia washing device through the first-stage wet desulfurization device pipeline. The ammonia washing device is connected to the benzene washing and stripping device through a pipeline;

[0027] The refined desulfurization unit of the coal gas includes an activated carbon desulfurization device, an organic sulfur hydrolysis device and a secondary wet desulfurization device. The benzol washing and recovery device is connected to the organic sulfur hydrolysis device through the pipeline of the activated carbon desulfurization device. The organic sulfur hydrolysis device is connected to the secondary wet desulfurization device through a pipeline. The secondary wet desulfurization device is selected from one of HPF desulfurization device, PDS desulfurization device and enhanced ammonia-sulfur circulation desulfurization device.

[0028] The primary wet desulfurization device and the secondary wet desulfurization device may be the same or different. In the first specific embodiment of the present invention, the primary wet desulfurization device and the secondary wet desulfurization device are the same. With the above arrangement, a set of desulfurization and regeneration device can be omitted, and the two are regenerated jointly.

[0029] The condensation and blast unit may also include any other suitable components. In the first specific embodiment of the present invention, the condensation and blast unit further includes a coal gas pipeline and an ammonia water spraying and cooling device. The coal gas pipeline is connected to the primary cooler through a pipeline. The ammonia water spraying and cooling device is arranged in the coal gas pipeline to spray and cool the raw coke oven gas in the coal gas pipeline with ammonia water.

[0030] The primary desulfurization unit of the coal gas may also include any other suitable components. In the first specific embodiment of the present invention, the primary desulfurization unit of the coal gas further includes a pre-cooling tower. The blower is connected to the primary wet desulfurization device through the pre-cooling tower pipeline.

[0031] The primary desulfurization unit of the coal gas may also include any other suitable components. In the first specific embodiment of the present invention, the primary desulfurization unit of the coal gas further includes a final cooling tower. The ammonia washing device is connected to the benzol washing and recovery device through the final cooling tower pipeline.

[0032] The refined desulfurization unit of the coal gas may also include any other suitable components. In the first specific embodiment of the present invention, the refined desulfurization unit of the coal gas further includes a pre-heater. The activated carbon desulfurization device is connected to the organic sulfur hydrolysis device through the pre-heater pipeline.

[0033] The following combines Figure 1 Specifically, the process steps of the high-quality coke oven gas purification system of the first specific embodiment of the present invention are described:

[0034] 1. Condensation and Blower Unit: The raw coke oven gas from the coke oven is sprayed and cooled by the circulating ammonia water at about 75 °C through the ammonia water spraying and cooling device, and the separation of the gas from the ammonia water, etc. is achieved in the gas pipeline; then the gas enters the primary cooler. The primary cooler can use hot water, circulating water, and low-temperature water for cooling in the upper, middle, and lower sections respectively. The cooled gas enters the electrostatic tar precipitator to remove the tar mist and naphthalene in the gas to the greatest extent. The gas after the electrostatic tar precipitator enters the blower and is pressurized and sent to the primary gas desulfurization unit.

[0035] 2. Primary Gas Desulfurization Unit:

[0036] (1) Primary Wet Desulfurization Device: The gas after the blower enters the pre-cooling tower and contacts the circulating spraying liquid sprayed from the top of the tower in a countercurrent manner, and is cooled to 22 - 30 °C; the circulating liquid is pumped out from the lower part of the tower and sent to the circulating liquid cooler, and is cooled to 21 - 28 °C with chilled water and then enters the top of the tower for circulating spraying. The pre-cooled gas enters the desulfurization tower (the primary wet desulfurization device can adopt the form of a desulfurization tower), and contacts the desulfurization liquid sprayed from the top of the tower in a countercurrent manner to absorb hydrogen sulfide in the gas (simultaneously absorbing ammonia in the gas to supplement the alkali source in the desulfurization liquid). The desulfurized gas is sent to the ammonia washing device. The desulfurization liquid that has absorbed H 2 S and HCN flows out from the bottom of the tower by gravity, passes through the liquid seal tank to the bottom tank, and then is sent to the regeneration tower by the desulfurization liquid pump. The desulfurization liquid is regenerated in the regeneration tower. The regenerated desulfurization liquid flows from the regeneration tank into the desulfurization tower for recycling. The desulfurization liquid used in this part can be PDS desulfurization liquid, HPF desulfurization liquid, or ammonia-sulfur circulation desulfurization rich liquid. The hydrogen sulfide content in the gas after desulfurization by the former two is not more than 200 mg / m 3 , and the hydrogen sulfide content in the gas after desulfurization by the latter is not more than 100 mg / m 3 .

[0037] (2) Ammonia Washing Device: The ammonia-containing gas from desulfurization enters the tower from the lower part of the absorption tower (the ammonia washing device can be a phosphoric acid ammonia washing device and can adopt the form of an absorption tower). The gas contacts the ammonium phosphate solution sprayed in a circulating manner in the tower, and the ammonia in the gas is absorbed. The absorption tower is a multi-stage empty spraying tower. The lean liquid from the desorption system enters from the top of the tower. The rich liquid at the bottom of the tower is pumped and circulated for spraying in the tower, and a certain amount of rich liquid is continuously drawn out and sent to the desorption system for regeneration. The rich liquid needs to be defouled, heat-exchanged with the hot lean liquid and deacidified before desorption, and then is sent to the top of the desorption tower by the rich liquid booster pump. The lean liquid at the bottom of the desorption tower returns to the top of the absorption tower for recycling after passing through the rich-lean liquid heat exchanger and the lean liquid cooler.

[0038] (3) Benzene Elution Unit: The temperature of the coal gas from the phosphoric acid washed ammonia is about ~40°C. First, it enters the bottom of the final cooling tower and contacts the final cooling water sprayed from the top of the tower in a countercurrent manner. After the coal gas is cooled to 25 - 27°C, it is discharged from the top of the final cooling tower through the mist catching layer and enters the benzene washing tower (the benzene elution unit can adopt the form of a benzene washing tower and a benzene stripping tower). In the benzene washing tower, it contacts the lean oil sprayed from the top of the tower at 28 - 30°C in a countercurrent manner to absorb benzene in the coal gas. The rich oil that has absorbed benzene first enters the oil-vapor heat exchanger with a rich oil pump and exchanges heat with the oil vapor from the top of the benzene stripping tower to increase the temperature; then it enters the rich-lean oil heat exchanger and is heated to 130 - 140°C by the hot lean oil discharged from the bottom of the benzene stripping tower, and then enters the rich oil heater and is heated to 180 - 190°C with superheated steam and then enters the benzene stripping tower. The hot lean oil discharged from the bottom of the benzene stripping tower is sent to the rich-lean oil heat exchanger with a hot lean oil pump to exchange heat with the rich oil, cooled by circulating water through a primary lean oil cooler and then enters the lean oil tank, and then sent to the secondary lean oil cooler with a lean oil pump and cooled by low-temperature water, and then recycled to the benzene washing tower.

[0039] 3. Coal Gas Fine Desulfurization Unit: The coke oven gas from the coal gas primary desulfurization unit first passes through an activated carbon desulfurization device to further remove impurities such as naphthalene and inorganic sulfur in the coal gas, and then enters a preheater and is preheated to ~150°C and then sent to an organic sulfur hydrolysis tower (the organic sulfur hydrolysis device can adopt the form of an organic sulfur hydrolysis tower). Under the action of the organic sulfur hydrolysis catalyst in the tower, COS and CS in the coal gas 2 are hydrolyzed to H 2 S, and the hydrolysis removal rate of organic sulfur is ≥90%. The coal gas after removing organic sulfur enters the secondary wet desulfurization tower (the secondary wet desulfurization device can adopt the form of a desulfurization tower), and contacts the desulfurization liquid sprayed from the top of the tower in a countercurrent manner to absorb hydrogen sulfide in the coal gas. When the primary wet desulfurization device and the secondary wet desulfurization device are the same, the regeneration tower (the desulfurization regeneration device can adopt the form of a regeneration tower) can be shared. The desulfurization liquid that has absorbed H 2 S and HCN is sent to the regeneration tower of the coal gas primary desulfurization unit for combined regeneration by a pump. The desulfurized coal gas contains less than 50 mg / Nm 3 of hydrogen sulfide and less than 10 mg / Nm 3 of organic sulfur.

[0040] Please refer to Figure 2 as shown. In the second specific embodiment of the present invention, compared with Figure 1Different from the first specific embodiment of the present utility model shown, for the primary wet desulfurization device of the coal gas primary desulfurization unit and the secondary wet desulfurization device of the coal gas fine desulfurization unit in the high-quality coke oven gas purification system, vacuum carbonate desulfurization devices are both adopted. The primary wet desulfurization device is arranged behind the ammonia washing device and the benzol washing and stripping device, and before the activated carbon desulfurization device. The vacuum carbonate desulfurization device can adopt vacuum potassium carbonate desulfurization. The desulfurization steps are as follows: The coke oven gas enters from the lower part of the desulfurization tower (the vacuum carbonate desulfurization device can adopt the form of a desulfurization tower), and contacts the potassium carbonate solution in a countercurrent manner. After the hydrogen sulfide, hydrogen cyanide and other gases in the coal gas are absorbed, the coal gas enters the next unit. The rich liquid that has absorbed the acidic gas at the bottom of the desulfurization tower enters the regeneration tower for regeneration. The regeneration tower operates under vacuum to desorb the acidic gas from the rich liquid. The acidic gas is sent to the Claus device to prepare sulfur. The remaining process steps are the same as those in Figure 1 the process steps of the first specific embodiment of the present utility model shown.

[0041] Application Example 1

[0042] Adopt Figure 1 the first specific embodiment shown to treat the raw coal gas of a coking plant, with a treatment capacity of 100,000 Nm 3 / h. The specific technical operation indexes and results are shown in Table 1.

[0043] Application Example 2

[0044] Adopt Figure 2 the second specific embodiment shown to treat the raw coal gas of a coking plant, with a treatment capacity of 50,000 Nm 3 / h. The specific technical operation indexes and results are shown in Table 1.

[0045] Table 1

[0046]

[0047] In the above two application examples, the hydrogen sulfide content in the desulfurized coal gas is less than 50 mg / Nm 3 , and the organic sulfur content is less than 10 mg / Nm 3 .

[0048] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0049] 1. By setting up the coal gas fine desulfurization unit, which also includes an activated carbon desulfurization device, an organic sulfur hydrolysis device and a secondary wet desulfurization device, the present utility model can further remove the organic sulfur in the coal gas, and the removal efficiency of the organic sulfur is greater than 90%.

[0050] 2. The secondary wet desulfurization device of the present utility model can be the same as the primary wet desulfurization device of the coal gas primary desulfurization unit, which can save a set of desulfurization regeneration system, and the two can be regenerated jointly.

[0051] 3. Through the organic combination of the primary coal gas desulfurization unit and the fine coal gas desulfurization unit, the present utility model can simultaneously remove organic sulfur and inorganic sulfur in the coal gas. After treatment, the hydrogen sulfide content in the high-quality coke oven gas is ≤ 50 mg / m 3 , and the organic sulfur content is ≤ 10 mg / m 3 , which can meet the requirement of meeting the discharge standard of sulfur dioxide after combustion.

[0052] Therefore, by adopting the present utility model, the hydrogen sulfide content in the raw coke oven gas is ≤ 200 mg / m 3 after being treated by the primary coal gas desulfurization unit, and the hydrogen sulfide content in the high-quality coke oven gas is ≤ 50 mg / m 3 after being treated by the fine coal gas desulfurization unit, and the organic sulfur content is ≤ 10 mg / m 3 . Thus, by adopting the present utility model to purify the raw coke oven gas, the inorganic sulfur and organic sulfur in the coal gas can be simultaneously removed, meeting the requirements of ultra-low emissions of iron and steel enterprises and meeting the discharge standard of sulfur dioxide at the end.

[0053] In summary, the high-quality coke oven gas purification system of the present utility model can effectively purify the coke oven gas. After desulfurization, the hydrogen sulfide content in the coal gas is less than 50 mg / Nm 3 , and the organic sulfur content is less than 10 mg / Nm 3 , which is suitable for large-scale popularization and application.

[0054] Thus, it can be seen that the purpose of the present utility model has been fully and effectively realized. The functions and structural principles of the present utility model have been demonstrated and explained in the embodiments. Without departing from the said principles, the implementation modes can be modified arbitrarily. Therefore, the present utility model includes all modified implementation modes based on the spirit and scope of the claims.

Claims

1. A high-quality coke oven gas purification system, comprising a condensing and blowing unit and a gas primary desulfurization unit, wherein the condensing and blowing unit comprises a primary cooler, an electric tar collector and a blower, wherein the gas primary desulfurization unit comprises a primary wet desulfurization device, an ammonia washing device and a benzene eluting device, wherein the primary wet desulfurization device is selected from one of a HPF desulfurization device, a PDS desulfurization device and an enhanced ammonia-sulfur cycle desulfurization device, wherein the primary cooler is connected to the blower through the electric tar collector pipeline, wherein the blower is connected to the ammonia washing device through the primary wet desulfurization device pipeline, wherein the ammonia washing device pipeline is connected to the benzene eluting device, wherein: The high-quality coke oven gas purification system also includes a gas fine desulfurization unit, wherein: The coal gas fine desulfurization unit includes an activated carbon desulfurization device, an organic sulfur hydrolysis device and a secondary wet desulfurization device. The benzene elution device is connected to the organic sulfur hydrolysis device through the activated carbon desulfurization device pipeline, and the organic sulfur hydrolysis device pipeline is connected to the secondary wet desulfurization device. The secondary wet desulfurization device is selected from one of the HPF desulfurization device, the PDS desulfurization device and the enhanced ammonia-sulfur cycle desulfurization device.

2. The high-quality coke oven gas purification system according to claim 1, characterized in that: The primary wet desulfurization device is the same as the secondary wet desulfurization device.

3. The high-quality coke oven gas purification system according to claim 1, characterized in that: The condensing and blowing unit also includes a gas pipeline and an ammonia water spraying cooling device. The gas pipeline is connected to the primary cooler. The ammonia water spraying cooling device is arranged in the gas pipeline for spraying ammonia water to cool the coke oven raw gas in the gas pipeline.

4. The high-quality coke oven gas purification system according to claim 1, characterized in that: The coal gas primary desulfurization unit also includes a precooling tower, and the blower is connected to the primary wet desulfurization device through the precooling tower pipeline.

5. The high-quality coke oven gas purification system according to claim 1, characterized in that: The coal gas primary desulfurization unit also includes a final cooling tower, and the ammonia washing device is connected to the benzene washing device through the final cooling tower pipeline.

6. The high-quality coke oven gas purification system according to claim 1, characterized in that: The coal gas fine desulfurization unit also includes a preheater, and the activated carbon desulfurization device is connected to the organic sulfur hydrolysis device through the preheater pipeline.

7. A high-quality coke oven gas purification system, comprising a condensing and blowing unit and a gas primary desulfurization unit, wherein the condensing and blowing unit comprises a primary cooler, an electric tar collector and a blower, and the gas primary desulfurization unit comprises a primary wet desulfurization device, an ammonia washing device and a benzene eluting device, wherein the primary wet desulfurization device is a vacuum carbonate desulfurization device, the primary cooler is connected to the blower through the electric tar collector pipeline, the blower is connected to the benzene eluting device through the ammonia washing device pipeline, and the benzene eluting device pipeline is connected to the primary wet desulfurization device, characterized in that: The high-quality coke oven gas purification system also includes a gas fine desulfurization unit, wherein: The coal gas fine desulfurization unit includes an activated carbon desulfurization device, an organic sulfur hydrolysis device and a secondary wet desulfurization device. The primary wet desulfurization device is connected to the organic sulfur hydrolysis device through the activated carbon desulfurization device pipeline, and the organic sulfur hydrolysis device pipeline is connected to the secondary wet desulfurization device. The secondary wet desulfurization device is a vacuum carbonate desulfurization device.

8. The high-quality coke oven gas purification system according to claim 7, characterized in that: The coal gas primary desulfurization unit also includes a precooling tower, and the blower is connected to the ammonia washing device through the precooling tower pipeline.

9. The high-quality coke oven gas purification system according to claim 7, characterized in that: The coal gas primary desulfurization unit also includes a final cooling tower, and the ammonia washing device is connected to the benzene washing device through the final cooling tower pipeline.

10. The high-quality coke oven gas purification system according to claim 7, characterized in that: The coal gas fine desulfurization unit also includes a preheater, and the activated carbon desulfurization device is connected to the organic sulfur hydrolysis device through the preheater pipeline.

Images