CN218860338U - Liquid ammonia production system for recycling inert gas discharged by refrigerating system - Google Patents
Liquid ammonia production system for recycling inert gas discharged by refrigerating system Download PDFInfo
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- CN218860338U CN218860338U CN202223576897.1U CN202223576897U CN218860338U CN 218860338 U CN218860338 U CN 218860338U CN 202223576897 U CN202223576897 U CN 202223576897U CN 218860338 U CN218860338 U CN 218860338U
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Abstract
The utility model discloses a liquid ammonia production system for recycling the discharged inert gas of a freezing system, which comprises a hot blast stove, a shell gasification furnace, a CO conversion system, a low-temperature methanol washing system, a liquid nitrogen washing system and an ammonia synthesis system which are sequentially communicated; the ammonia synthesis system comprises a synthesis gas compressor, a synthesis tower, an ammonia refrigerating device, an ammonia receiving tank and a liquid ammonia storage tank which are connected in sequence; the shell gasification furnace is respectively communicated with the hot blast stove and the CO conversion system; the ammonia receiving tank is communicated with the torch through a pipeline, and a torch combustion valve is arranged on the pipeline between the ammonia receiving tank and the torch; the ammonia receiving tank is communicated with the hot blast stove through an inert gas recovery pipeline, and a hot blast stove combustion valve is arranged on the inert gas recovery pipeline. The method has the advantages that the inert gas generated by the nitrogen-hydrogen mixed gas during ammonia synthesis is sent to the shell hot blast stove, so that the crude gas amount consumed by the hot blast stove is saved, and the saved crude gas is sent to a synthesis device to produce more synthetic ammonia.
Description
The technical field is as follows:
the utility model relates to a refrigerating system discharges inert gas recycle's liquid ammonia production system belongs to coal chemical industry field.
Background art:
the synthetic ammonia is prepared by gasifying raw material coal through a gasification furnace to prepare H-containing 2 And CO, and then adopting various purification methods to remove dust, H2S, organic sulfide, CO and CO in the gas 2 And the like to obtain clean 1:3 nitrogen-hydrogen mixed gas which meets the requirement of ammonia synthesis, and finally, the nitrogen-hydrogen mixed gas is compressed to synthesize ammonia by the aid of a catalyst.
The inert gas generated in the ammonia synthesis of the nitrogen-hydrogen mixed gas needs to be discharged through a refrigeration system, but the discharged inert gas still has more effective available components, wherein the hydrogen content is 59.6 percent, the nitrogen content is 27.9 percent, the ammonia content is 6.3 percent, and the methane content is 0.44 percent. At present, the part of gas is sent to a torch for burning, which causes waste.
The utility model has the following contents:
an object of the utility model is to provide a refrigerating system discharges inert gas recycle's liquid ammonia production system, sends the inert gas that nitrogen-hydrogen gas mixture produced when synthetic ammonia to shell tablet hot-blast furnace to practice thrift the raw gas tolerance of hot-blast furnace consumption.
The utility model discloses by following technical scheme implement: the liquid ammonia production system for recycling the inert gas discharged by the freezing system comprises a hot blast stove, a shell gasification furnace, a CO conversion system, a low-temperature methanol washing system, a liquid nitrogen washing system and an ammonia synthesis system which are sequentially communicated; the ammonia synthesis system comprises a synthesis gas compressor, a synthesis tower, an ammonia refrigerating device, an ammonia receiving tank and a liquid ammonia storage tank which are connected in sequence; the air outlet of the shell gasification furnace is respectively communicated with the air inlet of the hot blast stove and the air inlet of the CO conversion system; the exhaust port of the ammonia receiving groove is communicated with the air inlet of a torch through a pipeline, and a torch combustion valve is arranged on the pipeline between the ammonia receiving groove and the torch; and the exhaust port of the ammonia receiving tank is communicated with the air inlet of the hot blast stove through an inert gas recovery pipeline, and a hot blast stove combustion valve is arranged on the inert gas recovery pipeline.
Preferably, the torch combustion valve and the hot blast stove combustion valve are both cut-off valves.
The utility model has the advantages that: compared with the prior art, the inert gas generated by the nitrogen-hydrogen mixed gas during ammonia synthesis is sent to the shell hot blast stove, so that the crude gas amount consumed by the hot blast stove is saved, and the saved crude gas is sent to the synthesis device to produce more synthetic ammonia. The improved pipeline-type pipeline-free water-saving device is improved on the basis of the existing equipment, the transformation process is simple, only two switch valves are needed to be added except for a pipeline, the investment cost is low, and the economic benefit is high.
Description of the drawings:
fig. 1 is a schematic diagram of the system connection of the present invention.
The specific implementation mode is as follows:
example (b): as shown in fig. 1, the liquid ammonia production system for recycling the inert gas discharged by the freezing system comprises a hot blast stove 1, a shell gasification furnace 2, a CO conversion system 3, a low-temperature methanol washing system 4, a liquid nitrogen washing system 5 and an ammonia synthesis system 6 which are sequentially communicated; the ammonia synthesis system 6 comprises a synthesis gas compressor 61, a synthesis tower 62, an ammonia refrigerating device 63, an ammonia receiving tank 64 and a liquid ammonia storage tank 65 which are connected in sequence; the gas outlet of the shell gasification furnace 2 is respectively communicated with the gas inlet of the hot blast stove 1 and the gas inlet of the CO conversion system 3, most of the crude gas generated by the gasification of the shell gasification furnace 2 enters the CO conversion system 3 to generate synthetic ammonia, and the small part of the crude gas enters the hot blast stove 1 and is used as the fuel of the hot blast stove 1 and used for drying the pulverized coal entering the shell gasification furnace 2; the exhaust port of the ammonia receiving groove 64 is communicated with the air inlet of the torch 7 through a pipeline, and a torch combustion valve 71 is arranged on the pipeline between the ammonia receiving groove 64 and the torch 7; the exhaust port of the ammonia receiving groove 64 is communicated with the air inlet of the hot blast stove 1 through an inert gas recovery pipeline 8, and a hot blast stove combustion valve 9 is arranged on the inert gas recovery pipeline 8; the torch combustion valve 71 and the hot blast stove combustion valve 9 are both cut-off valves.
The working principle is as follows: raw material coal is dried by a hot blast stove 1, water content is reduced, then the raw material coal enters a shell gasification furnace 2, produced raw gas passes through a CO conversion system 3 and a low-temperature methanol washing system 4, the produced raw hydrogen enters a liquid nitrogen washing system 5 for further purification, is mixed with nitrogen from air separation and then enters a synthesis gas compressor 61, pressure is increased, then the raw material coal enters a synthesis tower 62, synthetic ammonia is generated under the action of a catalyst, then the raw material coal enters an ammonia receiving tank 64 after being cooled step by step, some inert gases which are not completely reacted are discharged out of the system in the ammonia synthesis process, and the components of the raw material coal comprise 59.6% of hydrogen, 27.9% of nitrogen, 6.3% of ammonia and 0.44% of methane. The crude gas is sent to a hot blast stove 1, the crude gas amount consumed by the hot blast stove 1 is reduced, so that more crude gas is sent to a post system through a CO conversion system 3 to generate synthetic ammonia, the synthetic ammonia yield can be improved, the economic benefit is high, and the gas yield is 6 ten thousand Nm 3 Taking the shell gasification furnace 2 of/H as an example, 720t of liquid ammonia is produced every day, and 150Nm of inert gas is discharged in freezing when the liquid ammonia is produced 3 The saved effective gas can produce 2.564t of liquid ammonia more every day, the gas is operated for 330 days per year, the liquid ammonia does not contain the price of 4032.58 yuan/t, and the annual economic benefit is 341.2 ten thousand yuan.
Claims (2)
1. The liquid ammonia production system for recycling the inert gas discharged by the freezing system comprises a hot blast stove, a shell gasification furnace, a CO conversion system, a low-temperature methanol washing system, a liquid nitrogen washing system and an ammonia synthesis system which are sequentially communicated; the ammonia synthesis system comprises a synthesis gas compressor, a synthesis tower, an ammonia refrigerating device, an ammonia receiving tank and a liquid ammonia storage tank which are connected in sequence; the air outlet of the shell gasification furnace is respectively communicated with the air inlet of the hot blast stove and the air inlet of the CO conversion system; the exhaust port of the ammonia receiving groove is communicated with the air inlet of a torch through a pipeline, and a torch combustion valve is arranged on the pipeline between the ammonia receiving groove and the torch; the ammonia receiving tank is characterized in that an exhaust port of the ammonia receiving tank is communicated with an air inlet of the hot blast stove through an inert gas recovery pipeline, and a hot blast stove combustion valve is arranged on the inert gas recovery pipeline.
2. The liquid ammonia production system for recycling of inerts discharged by a refrigeration system according to claim 1, wherein the flare combustion valve and the hot blast stove combustion valve are both cut-off valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223576897.1U CN218860338U (en) | 2022-12-30 | 2022-12-30 | Liquid ammonia production system for recycling inert gas discharged by refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223576897.1U CN218860338U (en) | 2022-12-30 | 2022-12-30 | Liquid ammonia production system for recycling inert gas discharged by refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218860338U true CN218860338U (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202223576897.1U Active CN218860338U (en) | 2022-12-30 | 2022-12-30 | Liquid ammonia production system for recycling inert gas discharged by refrigerating system |
Country Status (1)
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| CN (1) | CN218860338U (en) |
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2022
- 2022-12-30 CN CN202223576897.1U patent/CN218860338U/en active Active
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