CN85204141U - Combined raw gas-generating device for synthetic ammonia with inferior coal - Google Patents
Combined raw gas-generating device for synthetic ammonia with inferior coal Download PDFInfo
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- CN85204141U CN85204141U CN 85204141 CN85204141U CN85204141U CN 85204141 U CN85204141 U CN 85204141U CN 85204141 CN85204141 CN 85204141 CN 85204141 U CN85204141 U CN 85204141U CN 85204141 U CN85204141 U CN 85204141U
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- gas
- synthetic ammonia
- tar
- removing device
- low grade
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Abstract
The utility model discloses a hydrogenous mixed gas device for synthetic ammonia with inferior coal, comprising a gas generator, a gas wash tower, a multistage tar removal device with electricity or a device which combines a multistage tar removal device with machinery and a multistage tar removal device with electricity, a gas holder, a wet desulphurization device, a set of dry desulphurization devices comprising a catalytic hydrogenation conversion device of iron and molybdenum, an absorbing device filled with manganese oxide, an absorbing device filled with zinc oxide, and a methane converter filled with nickel catalyst. The component of the synthetic ammonia raw gas produced by the combination device is (H2 + CO) / N2 = 3.1, and the impurity content of CH4 is from 0.8 to 1.0 % which conforms to the requirement of the synthetic ammonia raw gas.
Description
The utility model belongs to produces the associated plant of synthetic ammonia with hydrogeneous gas mixture.
Middle-size and small-size nitrogen fertilizer plant producing 10000 tons of-80,000 tons of synthetic ammonia per year generally makes raw material with hard coal or coke, produces the synthetic ammonia unstripped gas through equipment such as producer gas generator, air-washer, gas holder and wet desulphurization devices.China is the very abundant countries of low grade coal reserves, raw material mix for a change, directly into stove gas making, they adopt equipment such as producer gas generator, fly-ash separator, mechanical coke removing appts., gas holder, wet desulphurization device to prepare the synthetic ammonia unstripped gas to the test of Dalate Banner, Inner Mongol fertilizer plant with brown coal.But,, cause that easily the back system pipeline stops up with the prepared syngas for synthetic ammonia coal tar content of this method height; Sulfur-containing impurities is many, causes the synthetic ammonia poisoning of catalyst easily; The methane content height causes a large amount of emptying of unstripped gas, causes the energy consumption height, production cost height, phenomenon such as device control is malfunctioning.
The purpose of this utility model is to apply mechanically the associated plant that low grade coal prepares synthetic ammonia usefulness unstripped gas for low grade coal prepares synthetic ammonia with unstripped gas design one.The equipment such as its producer gas generator in adopting prior art, fly-ash separator, mechanical coke removing appts., gas holder, wet desulphurization device, also comprised the device that multistage electric tar-removing device or multi-stage mechanical tar-removing device and electric tar-removing device combine, one group of pressurize dry desulfurization device and methane conversion stove.
The device that multistage electric tar-removing device or mechanical tar-removing device and electric tar-removing device combine is between fly-ash separator and gas holder.Multistage electric tar-removing device is made up of unit electricity tar-removing device serial or parallel connection.The device that multi-stage mechanical tar-removing device and electric tar-removing device the combine composition that is connected in series wherein has an electric tar-removing device at least.The water-gas that producer gas generator comes out, after gas wash tower is removed ash, enter the device that multistage electric tar-removing device or multi-stage mechanical tar-removing device and electric tar-removing device combine, remove tar impurity, make the coal-tar middle oil content of water-gas reduce to 15mg/m
3Below, enter gas holder.
One group of pressurization dry desulfurization device is between hydronitrogen compressor and methane conversion stove.It is made up of the absorption unit of iron molybdenum shortening conversion system or cobalt molybdenum shortening conversion system, the absorption unit of filling manganese oxide and filling zinc oxide.Iron molybdenum or cobalt molybdenum shortening conversion system make the organic sulfide in the water-gas be converted into inorganic sulphide gas.The absorption unit of filling manganese oxide is used for absorbing most inorganic sulphide gas in the water-gas.The absorption unit of filling zinc oxide is used for absorbing inorganic sulphide gas remaining in the water-gas.The water-gas that is come out by gas holder can make synthetic ammonia H in the water-gas through wet desulfuration tower and one group of pressurization dry desulfurization device
2The content of S is less than 1PPm.
The methane conversion stove is positioned at after dry desulfurization device and the air compressor, and nickel catalyzator is filled in its inside.Water-gas after the desulfurization enters the methane conversion stove through being warmed up to 600 ℃～650 ℃, and under nickel catalysis, making methane catalytic decomposition is CO and H
2, CH in the water-gas that the methane conversion stove comes out
4Content reduces to 0.8%～1%.
Produce the gas that synthetic ammonia is handled with the associated plant of unstripped gas through above-mentioned low grade coal, its component is (H
2+ CO)/N
2≈ 3.1, CH
4Foreign matter content is 0.8～1.0%, meets the requirement of synthetic ammonia with unstripped gas.
Advantage of the present utility model is that the low grade coal (as coals such as brown coal, flame coal, meager coal, non-caking coal, half sticking coals) that utilizes China's content very abundant replaces hard coal or coke to produce the synthetic ammonia unstripped gas as raw material as raw material.Make raw material with hard coal or coke, the expense of raw materials of one ton of synthetic ammonia of every production is 150～200 yuan, and with coal as raw material inferior, one ton of synthetic ammonia feedstock expense of every production is 60～100 yuan.Middle-size and small-size nitrogen fertilizer plant uses the utility model to reduce production costs significantly, increases economic efficiency, and can make full use of the low-quality coal resources of China's abundant.Another advantage of the present utility model is to have utilized equipment such as the existing equipment of small and medium ammonia synthesis plant such as producer gas generator, thionizer, gas wash tower, make production unit under the situation that increases not many investment, just can change raw material route and continue to produce.In addition, the unstripped gas quality that makes of the utility model increases.
Accompanying drawing is represented an example of the present utility model.Air and water vapor are fed incendiary low grade coal coal seam in the producer gas generator (1) off and on, produce water-gas.Water-gas is removed ash through gas wash tower (2), and entering voltage is the two-stage tandem electricity tar-removing device (3) and (4) of 20～40KV.It is 80～90 ℃ that electricity tar-removing device (3) adopts temperature, is used for removing heavy tar impurity in the water-gas; It is 35～45 ℃ that electricity removes tar (4) employing temperature, is used for removing tar light oil impurity in the water-gas, installs between (3) and the device (4) with interchanger (5) cooling.Behind the water-gas process two-stage tandem electricity tar-removing device, coal tar content is reduced to 15mg/m
3Below, enter gas holder (6).Water-gas in the gas holder (6) is pressed onto wet desulfurizer (8) by roots blower (7), carries out the desulfurization of solution liquid-phase catalysis, removes a part of inorganic sulphide, uses hydrogen nitrogen compressor (9) to be pressurized to 8 then.Kg/cm
2～20kg/cm
2Enter dry desulfurization device through over-heat-exchanger (10), comprising iron molybdenum shortening device (11), it makes the organic sulfide in the water-gas be converted into inorganic sulphide; Manganese oxide absorption unit (12) is used to slough most hydrogen sulfide impurities; Zinc oxide absorption unit (13) is used to slough remaining hydrogen sulfide impurities.Gas after the desulfurization is warmed up to 600～650 ℃ of methane conversion stoves (15) that enter nickel-containing catalyst through over-heat-exchanger (14), simultaneously sends into the pressurized air that is heated to 250～350 ℃ in stove, makes that methane self-heating catalytic pyrolysis is CO and H in the gas
2, the air add-on should satisfy the syngas for synthetic ammonia requirement.Gas is 800～850 ℃ in the converter temperature out, and methane content reduces to 0.8～1% in the gas, and its component is (H
2+ CO)/N
2≈ 3.1, CH
4Foreign matter content is 0.8～1.0%, meets the requirement of synthetic ammonia with unstripped gas.
This composite set particularly suitable is produced the middle-size and small-size nitrogen fertilizer plant of 10,000 tons～80,000 tons of synthetic ammonia per year.
Claims (4)
1, a kind ofly produces synthetic ammonia with low grade coal and comprise producer gas generator, fly-ash separator, mechanical coke removing appts., gas holder and wet desulphurization device with the associated plant of hydrogeneous gas mixture, feature of the present utility model is that it also comprises the device that multistage electric tar-removing device or multi-stage mechanical tar-removing device and electric tar-removing device combine, this device is between fly-ash separator and gas holder, one group of pressurization dry desulfurization device, this device is between hydronitrogen compressor and methane conversion stove, the methane conversion stove, this device is positioned at after dry desulfurization device and the air compressor.
2, low grade coal as claimed in claim 1 is produced synthetic ammonia and be it is characterized in that with the associated plant of unstripped gas said multistage electric tar-removing device is connected to form by serial or parallel connection, the device that multi-stage mechanical tar-removing device and electric tar-removing device the combine composition that is connected in series wherein has an electric tar-removing device at least.
3, low grade coal as claimed in claim 1 is produced synthetic ammonia and be it is characterized in that with the associated plant of unstripped gas said one group of dry desulfurization device comprises iron molybdenum shortening conversion system or cobalt molybdenum shortening conversion system, fills thick sulfide removal device that manganese oxide or manganese ore form and the absorption unit of filling zinc oxide.
4, low grade coal as claimed in claim 1 is produced synthetic ammonia and be it is characterized in that with the associated plant of unstripped gas said methane conversion stove is the converter that contains nickel catalyzator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204141 CN85204141U (en) | 1985-09-21 | 1985-09-21 | Combined raw gas-generating device for synthetic ammonia with inferior coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204141 CN85204141U (en) | 1985-09-21 | 1985-09-21 | Combined raw gas-generating device for synthetic ammonia with inferior coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204141U true CN85204141U (en) | 1986-08-06 |
Family
ID=4799520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204141 Withdrawn CN85204141U (en) | 1985-09-21 | 1985-09-21 | Combined raw gas-generating device for synthetic ammonia with inferior coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204141U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930648A (en) * | 2017-11-24 | 2018-04-20 | 福州大学 | A kind of heavy oil floating bed hydrocracking catalyst and preparation method thereof |
-
1985
- 1985-09-21 CN CN 85204141 patent/CN85204141U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930648A (en) * | 2017-11-24 | 2018-04-20 | 福州大学 | A kind of heavy oil floating bed hydrocracking catalyst and preparation method thereof |
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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) | ||
| RN01 | Renewal of patent term | ||
| 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 |