Efficient conversion device with deaminated wastewater recycling function and use method

Abstract

The invention discloses an efficient conversion device with a deamination wastewater recycling function and a use method, and relates to the technical field of conversion devices.The device comprises an ammonia washing tower body, an ammonia-containing wastewater delivery pipeline, a unit low-pressure stripping tower, a first ammonia-containing wastewater delivery valve, a second ammonia-containing wastewater delivery valve and a hydrogen production mechanism, a purification mechanism for purifying and separating black water generated by hydrogen production is arranged on the unit low-pressure stripping tower. Wastewater generated by analysis can be used for washing the coal hydrogen production device during hydrogen production through the hydrogen production mechanism, so that the wastewater can be preliminarily utilized, black water generated by the hydrogen production mechanism can be purified and separated through the purification mechanism, and grey water generated by purification and separation can be used for recycling the waste water. And the deaminated wastewater is conveyed into an inner cavity of the 1800-unit low-pressure stripping tower for repeated flash evaporation analysis, so that the deaminated wastewater can be recycled, and the deaminated wastewater can be reused.

Description

Technical Field

[0001] The present invention relates to the technical field of conversion devices, and in particular to a high-efficiency conversion device with a deammoniation wastewater recycling function and a use method thereof. Background Art

[0002] The conversion device specifically refers to the equipment used to convert carbon monoxide (CO) in synthesis gas into hydrogen (H2) and carbon dioxide (CO2) to adjust the gas composition to meet the requirements of subsequent processes, while deammoniation wastewater refers to the process of removing ammonia nitrogen components in wastewater through specific methods during the wastewater treatment process to make it meet the national discharge standards.

[0003] The conversion device of the existing coal-to-synthetic ammonia project adopts an isothermal conversion process, and the processing flow includes: the raw coal gas is heated by a heat exchanger, and a CO conversion reaction is carried out through a purification tank and a two-stage isothermal conversion reactor; the reaction gas is cooled by a multi-stage water cooler and separated from gas and water, and then sent to an ammonia washing tower for deammoniation. The conversion gas after deammoniation is used for a low-temperature methanol washing device, and the deammoniation wastewater is sent to a stripping tower for flash evaporation and analysis. The flashed analysis gas is cooled by a stripping water cooler and separated from gas and liquid by a stripping separator, and sent to a sulfur recovery device for combustion and acid production. The stripping separator separates the wastewater and sends it to a sewage station for treatment. In the production process, the stripping tower needs to maintain the temperature in the tower by adding 0.5MPa steam, and the condensate in the stripping tower needs to be sent to the gasification device 1800 unit for use by a stripping booster pump. In order to reuse the deammoniation wastewater and further reduce the cost required for the conversion device during use, based on this, a high-efficiency conversion device with a deammoniation wastewater recycling function and a method of use are now provided, which can eliminate the disadvantages of the existing device. Summary of the invention

[0004] The object of the present invention is to provide a high-efficiency conversion device with deammoniation wastewater recycling function and a method of use to solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-efficiency conversion device with a deammonification wastewater recycling function comprises an ammonia washing tower main body, an output end of the ammonia washing tower main body is equipped with an ammonia-containing wastewater delivery pipeline, an end of the ammonia-containing wastewater delivery pipeline away from the ammonia washing tower main body is provided with a unit low-pressure stripping tower, the ammonia-containing wastewater delivery pipeline is fixedly connected to an input end of the unit low-pressure stripping tower, a first ammonia-containing wastewater delivery valve and a second ammonia-containing wastewater delivery valve are sequentially installed on the ammonia-containing wastewater delivery pipeline, and a hydrogen production mechanism for coal-fired hydrogen production using wastewater is provided on the unit low-pressure stripping tower;

[0007] The unit low-pressure stripping tower is provided with a purification mechanism for purifying and separating black water produced by hydrogen production.

[0008] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0009] In an optional solution: the hydrogen production mechanism includes:

[0010] A first conveying assembly provided on the unit low-pressure stripping tower, wherein the first conveying assembly is used to convey wastewater;

[0011] The first conveying assembly comprises:

[0012] A pressurized delivery pipeline installed at an output end of the unit low-pressure stripping tower, on which a pressurized pump inlet valve, a pressurized pump body and a first grey water delivery valve are sequentially installed;

[0013] A hydrogen production component is arranged at one end of the pressurized delivery pipeline away from the unit low-pressure stripping tower. The hydrogen production component is used to produce hydrogen by burning coal and to perform chemical reactions, cooling and purification on wastewater.

[0014] In an optional solution: the hydrogen production component is a coal-to-hydrogen device arranged at one end of the pressurized external delivery pipeline away from the unit low-pressure stripping tower, and the pressurized external delivery pipeline is fixedly connected to the input end of the coal-to-hydrogen device;

[0015] The coal-to-hydrogen device is provided with a second conveying component, and the second conveying component is used to convey the black water generated by hydrogen production.

[0016] In an optional solution: the second conveying component includes:

[0017] A black water pipeline is fixedly connected to the output end of the coal-to-hydrogen device, and a black water discharge valve is installed on the black water pipeline.

[0018] In an optional solution: the purification mechanism includes:

[0019] A third conveying assembly arranged on the unit low-pressure stripping tower, the third conveying assembly being used to convey the purified and separated grey water to the inner cavity of the unit low-pressure stripping tower;

[0020] The third conveying assembly comprises:

[0021] A grey water delivery pipeline installed at an input end of the unit low-pressure stripping tower, wherein a second grey water delivery valve, a grey water pump body and a grey water pump inlet valve are sequentially installed on the grey water delivery pipeline;

[0022] A purification component is arranged at one end of the grey water delivery pipeline away from the unit low-pressure stripping tower.

[0023] In an optional scheme: the purification component is a sedimentation tank arranged at one end of the gray water delivery pipeline away from the unit low-pressure stripping tower, the gray water delivery pipeline is fixedly connected to the output end of the sedimentation tank, and the end of the black water pipeline away from the coal-to-hydrogen device is fixedly connected to the input end of the sedimentation tank.

[0024] In an optional solution: an air inlet pipe is installed at one input end of the ammonia washing tower body, and a conversion gas inlet valve is installed on the air inlet pipe; another input end of the ammonia washing tower body is installed with a water inlet pipe, and a desalted water inlet valve is installed on the water inlet pipe.

[0025] In an optional scheme: a first delivery pipeline is installed at the other output end of the ammonia washing tower body, a low-temperature methanol washing device is provided at one end of the first delivery pipeline away from the ammonia washing tower body, the first delivery pipeline is fixedly connected to the input end of the low-temperature methanol washing device, and a conversion gas out-of-boundary valve is installed on the first delivery pipeline.

[0026] In an optional solution: a second delivery pipeline is installed at the other output end of the unit low-pressure stripping tower, a sulfur recovery device is provided at one end of the second delivery pipeline away from the unit low-pressure stripping tower, the second delivery pipeline is fixedly connected to the input end of the sulfur recovery device, and a flash desorption gas delivery valve is installed on the second delivery pipeline.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention uses a hydrogen production mechanism to wash the wastewater generated by analysis to the coal-to-hydrogen production device during hydrogen production, thereby making preliminary use of the wastewater.

[0029] 2. The present invention can purify and separate the black water produced by the hydrogen production mechanism through the purification mechanism, and transport the gray water produced by the purification and separation to the inner cavity of the 1800 unit low-pressure stripping tower for repeated flash evaporation and analysis, thereby realizing the recycling of the deammoniation wastewater, so that the deammoniation wastewater can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention.

[0031] Notes on the figure markings: 1. Black water discharge valve; 2. Coal-to-hydrogen device; 3. Shift gas inlet valve for deamination tower; 4. Desalted water inlet valve for deamination tower; 5. Shift gas outlet valve; 6. Low-temperature methanol washing device; 7. First ammonia-containing wastewater outlet valve; 8. Ammonia washing tower body; 9. First gray water outlet valve; 10. Ammonia-containing wastewater outlet pipeline; 11. Pressurized outlet pipeline; 12. Second ammonia-containing wastewater outlet valve; 13. Booster pump body; 14. Black water pipeline; 15. Booster pump inlet valve; 16. Gray water outlet pipeline; 17. Gray water pump body; 18. 1800 unit low-pressure stripping tower; 19. Sedimentation tank; 20. Gray water pump inlet valve; 21. Second gray water outlet valve; 22. Flash analysis gas outlet valve; 23. Sulfur recovery device. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] In one embodiment, Figure 1 As shown, a high-efficiency conversion device with deammonification wastewater recycling function includes an ammonia washing tower body 8, an output end of the ammonia washing tower body 8 is equipped with an ammonia-containing wastewater delivery pipeline 10, an end of the ammonia-containing wastewater delivery pipeline 10 away from the ammonia washing tower body 8 is provided with a 1800-unit low-pressure stripping tower 18, the ammonia-containing wastewater delivery pipeline 10 is fixedly connected to an input end of the 1800-unit low-pressure stripping tower 18, a first ammonia-containing wastewater delivery valve 7 and a second ammonia-containing wastewater delivery valve 12 are sequentially installed on the ammonia-containing wastewater delivery pipeline 10, an input end of the ammonia washing tower body 8 is equipped with an air inlet pipe, a conversion gas inlet deammonification tower valve 3 is installed on the air inlet pipe, and another input end of the ammonia washing tower body 8 is equipped with a water inlet pipe, a desalted water inlet deammonification tower valve 3 is installed on the water inlet pipe. Tower valve 4, the other output end of the ammonia washing tower body 8 is equipped with a first delivery pipeline, the end of the first delivery pipeline away from the ammonia washing tower body 8 is provided with a low-temperature methanol washing device 6, the first delivery pipeline is fixedly connected to the input end of the low-temperature methanol washing device 6, the other output end of the 1800 unit low-pressure stripping tower 18 is equipped with a second delivery pipeline, the end of the second delivery pipeline away from the 1800 unit low-pressure stripping tower 18 is provided with a sulfur recovery device 23, the second delivery pipeline is fixedly connected to the input end of the sulfur recovery device 23, the first delivery pipeline is equipped with a conversion gas outbound valve 5, the second delivery pipeline is equipped with a flash evaporation analysis gas outbound valve 22, and the 1800 unit low-pressure stripping tower 18 is provided with a hydrogen production mechanism that uses wastewater to burn coal to produce hydrogen;

[0034] The 1800 unit low-pressure stripping tower 18 is provided with a purification mechanism for purifying and separating the black water produced by hydrogen production;

[0035] In this embodiment, when the conversion device is at 100% load, the conversion gas inlet deamination tower valve 3 and the desalted water inlet deamination tower valve 4 are opened respectively, and the conversion gas and desalted water are respectively transported to the inner cavity of the ammonia washing tower body 8 through the air inlet pipe and the water inlet pipe. In this process, the delivery amount of the desalted water can be controlled to be 24 t / h through the desalted water inlet deamination tower valve 4, so that the ammonia washing tower body 8 can wash and deammoniate the conversion gas through the desalted water;

[0036] At the same time, the shift gas outbound area valve 5 is opened, and the shift gas after deammoniation can be transported to the inner cavity of the low-temperature methanol washing device 6 through the first delivery pipeline for use by the low-temperature methanol washing device 6;

[0037] When the liquid level in the inner cavity of the ammonia washing tower body 8 is greater than 200 mm, the first ammonia-containing wastewater delivery valve 7 and the second ammonia-containing wastewater delivery valve 12 are opened. At this time, the ammonia-containing wastewater in the inner cavity of the ammonia washing tower body 8 can be discharged to the 1800 unit low-pressure stripping tower 18 for flash evaporation analysis through the ammonia-containing wastewater delivery pipeline 10;

[0038] Then, the flash evaporation gas delivery valve 22 is opened, and the 1800 unit low-pressure stripping tower 18 can deliver the evaporation gas generated by flash evaporation to the inner cavity of the sulfur recovery device 23 through the second delivery pipeline for combustion and acid production;

[0039] At the same time, the waste water generated by the analysis in the inner cavity of the 1800-unit low-pressure stripping tower 18 can be used by the hydrogen production mechanism. After the hydrogen production mechanism is washed, the black water generated by the hydrogen production is purified and separated by the purification mechanism;

[0040] When the black water is purified and separated into grey water, the grey water is then transported to the inner cavity of the 1800 unit low-pressure stripping tower 18 through the purification mechanism for repeated flash evaporation and analysis, thereby completing the recycling of the deammoniation wastewater, thereby reusing the deammoniation wastewater and further reducing the cost required for the conversion device during use;

[0041] In one embodiment, Figure 1 As shown, the hydrogen production mechanism includes:

[0042] A first conveying assembly provided on the 1800 unit low-pressure stripping tower 18, the first conveying assembly being used for conveying wastewater;

[0043] The first conveying assembly includes:

[0044] A pressurized delivery pipeline 11 is installed at one output end of the 1800 unit low-pressure stripping tower 18, and a pressurized pump inlet valve 15, a pressurized pump body 13 and a first grey water delivery valve 9 are sequentially installed on the pressurized delivery pipeline 11;

[0045] A hydrogen production assembly is provided at one end of the pressurized delivery pipeline 11 away from the 1800 unit low-pressure stripping tower 18, and the hydrogen production assembly is used to produce hydrogen by burning coal and to perform chemical reactions, cooling and purification on wastewater;

[0046] The hydrogen production component is a coal-to-hydrogen production device 2 arranged at one end of the pressurized external delivery pipeline 11 away from the 1800-unit low-pressure stripping tower 18, and the pressurized external delivery pipeline 11 is fixedly connected to the input end of the coal-to-hydrogen production device 2;

[0047] The coal-to-hydrogen device 2 is provided with a second conveying assembly, which is used to convey the black water produced by hydrogen production;

[0048] The second conveying assembly includes:

[0049] A black water pipeline 14 is fixedly connected to the output end of the coal-to-hydrogen device 2, and a black water discharge valve 1 is installed on the black water pipeline 14;

[0050] The first conveying component can be used to convey the wastewater generated by analysis in the inner cavity of the 1800-unit low-pressure stripping tower 18 to the inner cavity of the coal-to-hydrogen device 2, so as to supply the coal-to-hydrogen device 2 with hydrogen production operations. After the coal-to-hydrogen device 2 is washed, the black water generated by washing can be conveyed to the purification mechanism through the second conveying component.

[0051] In one embodiment, Figure 1 As shown, the purification mechanism includes:

[0052] A third conveying assembly is arranged on the 1800 unit low-pressure stripping tower 18, and the third conveying assembly is used to convey the purified and separated gray water to the inner cavity of the 1800 unit low-pressure stripping tower 18;

[0053] The third conveying assembly includes:

[0054] A grey water delivery pipeline 16 is installed at one input end of the 1800 unit low-pressure stripping tower 18, and a second grey water delivery valve 21, a grey water pump body 17 and a grey water pump inlet valve 20 are sequentially installed on the grey water delivery pipeline 16;

[0055] A purification assembly is provided at one end of the grey water delivery pipeline 16 away from the 1800 unit low-pressure stripping tower 18;

[0056] The purification component is a sedimentation tank 19 arranged at one end of the gray water delivery pipe 16 away from the 1800 unit low-pressure stripping tower 18. The gray water delivery pipe 16 is fixedly connected to the output end of the sedimentation tank 19, and the end of the black water pipe 14 away from the coal-to-hydrogen device 2 is fixedly connected to the input end of the sedimentation tank 19. The purified and separated gray water can be transported to the inner cavity of the 1800 unit low-pressure stripping tower 18 through the third conveying component for repeated flash evaporation and analysis, thereby realizing the recycling of deammoniation wastewater, so that the deammoniation wastewater can be reused.

[0057] The above embodiment discloses a high-efficiency conversion device with a deammonification wastewater recycling function, wherein when the conversion device is in use, when the conversion device is at 100% load, the conversion gas inlet deammonification tower valve 3 and the desalted water inlet deammonification tower valve 4 are opened respectively, and the conversion gas and desalted water are respectively transported to the inner cavity of the ammonia washing tower body 8 through the air inlet pipe and the water inlet pipe. In this process, the delivery amount of the desalted water can be controlled to be 24t / h through the desalted water inlet deammonification tower valve 4, so that the ammonia washing tower body 8 can wash and deammonify the conversion gas through the desalted water;

[0058] At the same time, the shift gas outbound area valve 5 is opened, and the shift gas after deammoniation can be transported to the inner cavity of the low-temperature methanol washing device 6 through the first delivery pipeline for use by the low-temperature methanol washing device 6;

[0059] When the liquid level in the inner cavity of the ammonia washing tower body 8 is greater than 200 mm, the first ammonia-containing wastewater delivery valve 7 and the second ammonia-containing wastewater delivery valve 12 are opened. At this time, the ammonia-containing wastewater in the inner cavity of the ammonia washing tower body 8 can be discharged to the 1800 unit low-pressure stripping tower 18 for flash evaporation analysis through the ammonia-containing wastewater delivery pipeline 10;

[0060] Then, the flash evaporation gas delivery valve 22 is opened, and the 1800 unit low-pressure stripping tower 18 can deliver the evaporation gas generated by flash evaporation to the inner cavity of the sulfur recovery device 23 through the second delivery pipeline for combustion and acid production;

[0061] At the same time, the booster pump inlet valve 15 and the first ash water delivery valve 9 are opened, and the booster pump body 13 is started to perform a pressurizing operation. At this time, the booster pump body 13 is pressurized to 4.5 MPa, and the wastewater generated by the analysis in the inner cavity of the 1800 unit low-pressure stripping tower 18 can be transported to the inner cavity of the coal-to-hydrogen device 2 through the pressurized delivery pipeline 11 for use by the coal-to-hydrogen device 2;

[0062] When the coal-to-hydrogen device 2 is used for washing, the black water discharge valve 1 is opened, and the black water produced by washing can be transported to the inner cavity of the sedimentation tank 19 through the black water pipeline 14 for purification and separation;

[0063] When the black water is purified and separated into gray water, the gray water pump inlet valve 20 and the second gray water delivery valve 21 are opened, and the gray water pump body 17 is pressurized to 0.2MPa at the same time, the gray water in the inner cavity of the sedimentation tank 19 can be transported to the inner cavity of the 1800 unit low-pressure stripping tower 18 through the gray water delivery pipeline 16 for repeated flash evaporation and analysis, so as to complete the recycling of the deammoniation wastewater, thereby realizing the reuse of the deammoniation wastewater and further reducing the cost required for the conversion device during use. At the same time, it has the advantages of good treatment effect, safety and reliability, simple process, and low operating cost.

[0064] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A high-efficiency conversion device with a deammonification wastewater recycling function, comprising an ammonia washing tower body (8), an output end of the ammonia washing tower body (8) is equipped with an ammonia-containing wastewater delivery pipeline (10), an end of the ammonia-containing wastewater delivery pipeline (10) away from the ammonia washing tower body (8) is provided with a 1800-unit low-pressure stripping tower (18), the ammonia-containing wastewater delivery pipeline (10) is fixedly connected to an input end of the 1800-unit low-pressure stripping tower (18), and a first ammonia-containing wastewater delivery valve (7) and a second ammonia-containing wastewater delivery valve (12) are sequentially installed on the ammonia-containing wastewater delivery pipeline (10), characterized in that: The 1800 unit low-pressure stripping tower (18) is provided with a hydrogen production mechanism for producing hydrogen by burning coal using waste water; The 1800-unit low-pressure stripping tower (18) is provided with a purification mechanism for purifying and separating black water generated by hydrogen production.

2. A high-efficiency conversion device with deammoniation wastewater recycling function according to claim 1, characterized in that: The hydrogen production mechanism comprises: a first conveying assembly arranged on a 1800-unit low-pressure stripping tower (18), the first conveying assembly being used to convey wastewater; The first delivery assembly comprises: a pressurized delivery pipeline (11) installed at an output end of the 1800 unit low-pressure stripping tower (18), and a pressurized pump inlet valve (15), a pressurized pump body (13) and a first grey water delivery valve (9) are sequentially installed on the pressurized delivery pipeline (11); A hydrogen production component is provided at one end of the pressurized delivery pipeline (11) away from the 1800 unit low-pressure stripping tower (18).

3. A high-efficiency conversion device with deammoniation wastewater recycling function according to claim 2, characterized in that: The hydrogen production component is a coal-to-hydrogen device (2) arranged at one end of a pressurized external delivery pipeline (11) away from the 1800-unit low-pressure stripping tower (18), and the pressurized external delivery pipeline (11) is fixedly connected to the input end of the coal-to-hydrogen device (2); The coal-to-hydrogen device (2) is provided with a second conveying component, and the second conveying component is used to convey the black water generated by hydrogen production.

4. A high-efficiency conversion device with deammoniation wastewater recycling function according to claim 3, characterized in that: The second transport component comprises: a black water pipeline (14) fixedly connected to the output end of the coal-to-hydrogen device (2), and a black water discharge valve (1) is installed on the black water pipeline (14).

5. A high-efficiency conversion device with deammoniation wastewater recycling function according to claim 4, characterized in that: The purification mechanism comprises: a third conveying assembly arranged on the 1800-unit low-pressure stripping tower (18), the third conveying assembly being used to convey the purified and separated grey water to the inner cavity of the 1800-unit low-pressure stripping tower (18); The third delivery assembly comprises: a grey water delivery pipeline (16) installed at an input end of the 1800 unit low-pressure stripping tower (18), and a second grey water delivery valve (21), a grey water pump body (17) and a grey water pump inlet valve (20) are sequentially installed on the grey water delivery pipeline (16); A purification component is provided at one end of the grey water delivery pipeline (16) away from the 1800 unit low-pressure stripping tower (18).

6. A high-efficiency conversion device with deammoniation wastewater recycling function according to claim 5, characterized in that: The purification component is a sedimentation tank (19) arranged at one end of the gray water delivery pipeline (16) away from the 1800 unit low-pressure stripping tower (18), the gray water delivery pipeline (16) is fixedly connected to the output end of the sedimentation tank (19), and the end of the black water pipeline (14) away from the coal-to-hydrogen device (2) is fixedly connected to the input end of the sedimentation tank (19).

7. The high-efficiency conversion device with deammoniation wastewater recycling function according to claim 1 is characterized in that: An air inlet pipe is installed at one input end of the ammonia washing tower body (8), and a conversion gas inlet valve (3) is installed on the air inlet pipe. A water inlet pipe is installed at the other input end of the ammonia washing tower body (8), and a desalted water inlet valve (4) is installed on the water inlet pipe.

8. The high-efficiency conversion device with deammoniation wastewater recycling function according to claim 1 is characterized in that: A first delivery pipeline is installed at the other output end of the ammonia washing tower body (8); a low-temperature methanol washing device (6) is provided at one end of the first delivery pipeline away from the ammonia washing tower body (8); the first delivery pipeline is fixedly connected to the input end of the low-temperature methanol washing device (6); and a conversion gas out-of-bounds valve (5) is installed on the first delivery pipeline.

9. The high-efficiency conversion device with deammoniation wastewater recycling function according to claim 1, characterized in that: A second delivery pipeline is installed at the other output end of the 1800-unit low-pressure stripping tower (18); a sulfur recovery device (23) is provided at one end of the second delivery pipeline away from the 1800-unit low-pressure stripping tower (18); the second delivery pipeline is fixedly connected to the input end of the sulfur recovery device (23); and a flash desorption gas delivery valve (22) is installed on the second delivery pipeline.

10. A method for using the high-efficiency conversion device with deammoniation wastewater recycling function according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Open the valve (3) for the conversion gas to enter the deamination tower and the valve (4) for the desalted water to enter the deamination tower, respectively convey the conversion gas and the desalted water to the inner cavity of the ammonia washing tower body (8) through the air inlet pipe and the water inlet pipe, and perform washing and deammoniation treatment on the conversion gas with the deammonified water. In this process, the conveying amount of the desalted water is controlled to be 24 t / h through the valve (4) for the desalted water to enter the deamination tower; Step 2: When the liquid level in the inner cavity of the ammonia scrubbing tower body (8) is greater than 200 mm, the ammonia-containing wastewater is transported to the inner cavity of the 1800-unit low-pressure stripping tower (18) for flash evaporation analysis, and the analysis gas is transported to the sulfur recovery device (23) for combustion and acid production. At the same time, the pressure is increased to 4.5 MPa by the booster pump body (13), and the wastewater generated by the analysis is transported to the inner cavity of the coal-to-hydrogen production device (2) for use in the coal-to-hydrogen production device (2) for washing; Step 3: After the coal-to-hydrogen device (2) is used for washing, the black water generated by washing is transported to the inner cavity of the sedimentation tank (19) for purification and separation, and then pressurized to 0.2MPa through the gray water pump body (17), and the purified and separated gray water is transported to the inner cavity of the 1800 unit low-pressure stripping tower (18) for repeated flash evaporation and analysis, thereby completing the recycling of the deammoniation wastewater.

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