CN1020270C - Improved pressurizing technology for raw gas before entering conversion furnace in ammonia-making process flow - Google Patents
Improved pressurizing technology for raw gas before entering conversion furnace in ammonia-making process flow Download PDFInfo
- Publication number
- CN1020270C CN1020270C CN 91108225 CN91108225A CN1020270C CN 1020270 C CN1020270 C CN 1020270C CN 91108225 CN91108225 CN 91108225 CN 91108225 A CN91108225 A CN 91108225A CN 1020270 C CN1020270 C CN 1020270C
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- China
- Prior art keywords
- compressor
- water
- unstripped gas
- gas
- ammonia
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Abstract
The present invention relates to an improvement on pressurizing technology for a synthetic ammonia preparing flow before the entry of raw material gas into a change work section. In the present invention, the low pressure section of the existing piston compressor is replaced by a screw compressor, and desulfurized raw material gas enters the screw compressor so as to be pressurized; meanwhile, desalted and deoxidized cooling water is sprayed into the compressor, and the amount of sprayed water enables the gas temperature to range from 95 DEG C to 105 DEG C; the mixture of gas, water vapor and hot water, which is pressurized to the required pressure, is discharged through an outlet of the compressor, and the gas and the water vapor which are separated from the hot water are loaded into the change work section together. The technology has the advantages of simplified equipment, simplified flow, decrease in steam supply outside the change work section through steam as auxiliary products of a compression process, reduced energy consumption and reduced ammonia preparing cost.
Description
The invention relates in the production of synthetic ammonia, unstripped gas is gone into the improvement of the preceding pressing technology of conversion section.
In production of synthetic ammonia, contain a certain amount of CO in the unstripped gas before the conversion, need under catalyst action, to carry out transformationreation with water vapor, generate CO
2And the required raw material H of synthetic ammonia
2, its reaction formula is as follows:
CO+H
2O→CO
2+H
2
This reaction both need have been pressurizeed and carried out, and needed a certain amount of water vapor again, therefore, before unstripped gas enters conversion section, must send into compressor pressurizes earlier.Existing pressing technology is: the unstripped gas after the desulfurization is sent into the compression of reciprocating compressor low-pressure stage, because gas produces heat after compression, therefore the gas after every section supercharging must enter the watercooler cooling, enter water-and-oil separator again and separate and to remove the oil that moisture and compressor are brought into, enter next section pressurization subsequently.This pressing technology flow process complexity, equipment is huge, and gas boosting and the heat that produces fail to make full use of, and energy consumption is big.
The objective of the invention is for Ammonia Production provides a kind of flow process simple, equipment is simplified, and can rationally utilize the unstripped gas pressing technology of energy, to reduce facility investment, saves energy consumption, reduces the Ammonia Production cost.
For achieving the above object, the method that the present invention adopts is, unstripped gas after the desulfurization is fed the screw-type compressor pressurization, in compressor, spray into simultaneously water coolant through the desalination deoxygenation, injection flow rate makes semi-water gas keep 100 ± 5 ℃ and is advisable, be pressurized to required pressure unstripped gas, water vapor and hot water mixture from the outlet discharge of screw-type compressor, send into air water separator, isolate hot water.The unstripped gas of gained and water vapor are sent into conversion section in the lump, and the hot water of gained can be sent into boiler heating system steam, also can be directly for producing or life hot water.The water coolant that sprays in compressor must be handled through the desalination deoxygenation, prevents the compressor fouling, and excess of oxygen is brought system into.
In sum, the present invention goes into the pressing technology of the unstripped gas before the conversion section owing to adopt screw-type compressor to replace the low-pressure stage of reciprocating compressor, compression and process of cooling are carried out simultaneously, huge intersegmental refrigerating unit and water-and-oil separator have been saved, equipment is simplified, process simplification, reduce facility investment and needed to use plant area, main is that the present invention utilizes heat by-product water vapor and the hot water that produces in the gas compression processes, both reached the purpose of cooling gas, can be conversion section again portion water steam is provided, two get at one stroke.A large amount of high-temperature-hot-waters can feed boiler and reduce the Boiler Steam energy consumption, also can provide it to use.Through adjusting, for the 1.3Mpa conversion, the high-temperature-hot-water of recyclable 150～200 kg of water steam of ammonia per ton and 0.8 ton 96～100 ℃, 0.8Mpa conversion, recyclable 200～250 kg of water steam of ammonia per ton and 0.4 ton of 96～100 ℃ of high-temperature-hot-water, reduced the outer for steam of conversion, energy efficient reduces system ammonia cost.
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is a unstripped gas pressing technology FB(flow block) of the present invention.
Fig. 2 is the screw-type compressor synoptic diagram.
As Fig. 1, the unstripped gas after the desulfurization feeds screw-type compressor, and feeds the desalination deaerated water to compressor, and the water vapor of unstripped gas after the pressurization and compressor by-product is sent to conversion section, and isolated hot water is stand-by.The required steam insufficient section of conversion can be steamed by boiler and mend.
As Fig. 2, spiral-lobe compressor is driven by motor N, unstripped gas after the desulfurization is imported by compressor inlet, water coolant through the desalination deoxygenation is sprayed in the compressor by several water jet standpipes, make compressor be in intimate isothermal compression, discharge unstripped gas, water vapor and the hot water mixture of supercharging from the outlet of compressor, go into conversion section after separating hot water.
Claims (1)
- In the Ammonia Production flow process, unstripped gas is gone into the pressing technology before the conversion section, it is characterized in that the unstripped gas after the desulfurization is fed the screw-type compressor pressurization, in the compressor cylinder, spray into simultaneously water coolant through the desalination deoxygenation, injection flow rate is so that unstripped gas keeps 100 ± 5 ℃ to be advisable, be pressurized to required pressure unstripped gas, water vapor and hot water mixture from what the outlet of spiral-lobe compressor was discharged, send into air water separator, unstripped gas and the water vapor isolated behind the hot water are sent into conversion section in the lump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108225 CN1020270C (en) | 1991-11-06 | 1991-11-06 | Improved pressurizing technology for raw gas before entering conversion furnace in ammonia-making process flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108225 CN1020270C (en) | 1991-11-06 | 1991-11-06 | Improved pressurizing technology for raw gas before entering conversion furnace in ammonia-making process flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060448A CN1060448A (en) | 1992-04-22 |
| CN1020270C true CN1020270C (en) | 1993-04-14 |
Family
ID=4909141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91108225 Expired - Fee Related CN1020270C (en) | 1991-11-06 | 1991-11-06 | Improved pressurizing technology for raw gas before entering conversion furnace in ammonia-making process flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020270C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351146A (en) * | 2011-07-21 | 2012-02-15 | 安徽淮化股份有限公司 | Purification method and equipment for feed gas of ammonia and methyl alcohol synthesis |
-
1991
- 1991-11-06 CN CN 91108225 patent/CN1020270C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1060448A (en) | 1992-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |