CN1014419B - Produce the technology of syngas for synthetic ammonia with space gas - Google Patents
Produce the technology of syngas for synthetic ammonia with space gasInfo
- Publication number
- CN1014419B CN1014419B CN 87105279 CN87105279A CN1014419B CN 1014419 B CN1014419 B CN 1014419B CN 87105279 CN87105279 CN 87105279 CN 87105279 A CN87105279 A CN 87105279A CN 1014419 B CN1014419 B CN 1014419B
- Authority
- CN
- China
- Prior art keywords
- gas
- umformer
- coal
- synthetic ammonia
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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- Industrial Gases (AREA)
Abstract
A kind of technology that replaces semi-water gas production syngas for synthetic ammonia by air gas, its principal character is to be that raw material produces producer gas with the low grade coal, three umformers of recycle, catalyst Fe304 wherein passes through respectively and reduces, blows off, oxidising process, part coal gas burns in gas fired-boiler, utilizes N in the flue gas
2, the water vapor of generation is used for generating, and part is used to produce H
2Distinguishing feature of the present invention is that heat energy is made full use of, and coal consumption is low, and the hydrogen fluorine specific volume of syngas for synthetic ammonia is easy to control, unstripped gas purity height, and following step operation emptying amount is few.
Description
The invention belongs to the preparation technology of the gaseous mixture that synthetic ammonia uses.
At medium and small synthesis ammonia plant, generally adopt immovable bed evaporating method intermittently to produce semi-water gas as syngas for synthetic ammonia.Its technical process is semi-water gas-remove a seat desulfurization (H
2S)-conversion-unstripped gas.Require to use high hard coal or the coke of fat coal-activity, can't use bituminous coal, and exist coal consumption to reach shortcomings such as producing methane gas greatly.
The objective of the invention is to seek a kind of lambskin or bituminous coal of utilizing and be the raw material production syngas for synthetic ammonia, and cooperate cogeneration to reduce the novel process of coal consumption significantly.
Technical process of the present invention is as follows:
1. aerogenesis: in producer, be raw material with lambskin or bituminous coal, through the air of preheating in stove with the coal reaction, generate CO, CO
2, SO
2Temperature is controlled at 950-1000 ℃ in the gas, stove.The reaction of air and coal is carried out continuously, and send air hockets with water vapor when having overcome semi-water gas and producing, and furnace temperature descends when sending water vapor, if when use bituminous coal, furnace temperature is difficult for raising again, and the factor of created gase reduction, production H
2The S amount increases problems such as desulfurization difficulty too greatly.
2. dust-removal and desulfurizing: in washing tower, use the ammonia scrubbing producer gas, remove ash and SO in the coal gas
2Coal gas advances tower and tower exit temperature is 30-100 ℃, and the best is 77 ℃.
3. restoring transformation: in first umformer, in the coal gas CO with touch the reaction of oxidation of coal iron and generate CO
2, touch coal simultaneously and be reduced into iron:
This reaction is thermopositive reaction, and the temperature of umformer is controlled at 527 ± 30 ℃.
4. combustion gas: through the first umformer conversion, some CO sends into gas fired-boiler to above-mentioned gas in the coal gas, and residual CO is all burned, is oxidized to CO
2
5. washing: the gas that comes out from gas fired-boiler, in washing tower, water or ammoniacal liquor drip washing, flush away CO
2, obtain one of purified syngas for synthetic ammonia-nitrogen.
6. blow off: the purified nitrogen pneumatic transmission through washing is gone into second umformer, blows off this umformer in order to next step usefulness.Nitrogen send synthetic ammonia workshop section in required ratio, and redundance is emptying then.The temperature of umformer remains on 527 ± 30 ℃.
7. oxidation conversion: the water vapor that gas fired-boiler produces is introduced the 3rd umformer, water vapor with touch the reaction of coal iron:
It is oxidized to touch coal iron, and water vapor is reduced generation hydrogen.Hydrogen is delivered to synthetic ammonia workshop section by the amount that is three times in nitrogen.The temperature of umformer remains on 527 ± 30 ℃.
The reduction of first, second and third umformer, blow off, the circulation of three processes of oxidation carries out.Whole process is to operate under normal pressure.
The water vapor that gas fired-boiler produced is (25 kilograms/millimeter of middle pressures
2) steam, send steam turbine power generation workshop section.
The drawing explanation: accompanying drawing is a process flow sheet of the present invention.
Now further specify the present invention with embodiment in conjunction with the accompanying drawings.
In producer, make material gasification with bituminous coal, temperature of reaction remains on 950-1000 ℃.The pyritous air gas is delivered to thionizer after dropping to 77 ± 10 ℃ through heat exchanger temperature, uses the ammonia spray dust-removal and desulfurizing.After the air gas wire heat exchanger heating after the desulfurization, temperature rises to 508 ± 10 ℃, delivers to thatch one umformer, CO in the coal gas and Fe
3O
4Response transform becomes CO
2And Fe.In the umformer during media reductive temperature of reaction be 450-550 ℃, be preferably 527 ℃.Also have half CO end to be reduced in the air gas, CO is by after-flame in gas fired-boiler, and the water vapor that boiler produces is used for syngas for synthetic ammonia and generating.The flue gas total amount that boiler is discharged 1/3 through heat exchanger, send into washing tower after the cooling, flush away CO wherein
2, only surplus N
2And micro-O
2, again through heat exchanger, flue gas is heated to 400-460 ℃, feeds in the umformer, blows off wherein remaining air gas and CO
2, the micro-O in the flue gas
2Removed it with the Fe reaction.The gas that blows off the initial stage is because of having closed CO
2, because of its temperature up to 500 ℃ about, so be used for the dried feed coal.Blowing off not, the flue gas of phase is purified N
2, with it and H
2Send synthetic ammonia workshop section in 1: 3 ratio.Its consumption is the 15-20% of purge gas amount, best 17%.It is 1～2 kilogram/millimeter to wherein sending into pressure that umformer blows off the phase end back
2, mass dryness fraction is the wetting vapour of 0.7-0.8, water with touch coal iron redox reaction, generate H
2And Fe
3O
4This reaction is thermopositive reaction, makes the temperature of touching coal remain on 450～550 ℃.In this temperature range, the transformation efficiency that water is converted into hydrogen is 80～84%.Hydrogen is through cooling, and water wherein is condensed and isolates pure hydrogen and nitrogen, becomes syngas for synthetic ammonia by 3: 1 mixed.
Three umformers by reduce-blow off-recycle oxidation period.
Replace semiwater gas to produce syngas for synthetic ammonia with air gas, distinguishing feature of the present invention is:
1. can be raw material with lambskin and flue gas.
2. heat energy is taken full advantage of, and coal consumption is descended.
3. remove SO2On the technique than taking off H2S is easy.
4. it is easy to control that hydrogen and nitrogen are produced the hydrogen nitrogen specific volume that can make syngas for synthetic ammonia by stages.
5. the purity of unstripped gas is high, contains hardly CO, CO2And CH4, therefore significantly alleviate the load of the gas refinement of operation of lower step, also decrease circulating air emptying amount in the synthetic ammonia tower, improve the utilization rate of unstripped gas.
Claims (2)
1, a kind of technology of producing syngas for synthetic ammonia through dust-removal and desulfurizing, conversion process by air gas the invention is characterized in:
(1) aerogenesis: with lambskin or bituminous coal is raw material, burns in producer, and temperature remains on 950-1000 ℃ in the stove, through the air of preheating in stove with the coal reaction, produce CO, CO
2, SO
2
(2) dust-removal and desulfurizing: in washing tower, use the ammonia scrubbing producer gas, remove ash and SO in the coal gas
2, coal gas turnover tower temperature is 30-100 ℃.
(3) restoring transformation: in first umformer, the reaction of CO and catalyst ferric oxide generates CO in the coal gas
2, catalyst is reduced into iron simultaneously, and the temperature of umformer is controlled at 527 ± 30 ℃.
(4) combustion gas: in gas fired-boiler, portion C O residual in the restoring transformation device all is oxidized to CO2.
(5) washing: from the gas that gas fired-boiler comes out, water or ammoniacal liquor drip washing in washing tower, flush away CO
2, obtain purified nitrogen.
(6) blow off: the purified nitrogen pneumatic transmission through washing is gone into second umformer, blows off this umformer in order to next step usefulness, and nitrogen send synthetic ammonia workshop section, and the temperature of umformer remains on 527 ± 30 ℃.
(7) oxidation conversion is introduced the 3rd umformer to the water vapor that gas fired-boiler gas produces, catalyst iron and steam reaction, catalyst is oxidized to ferric oxide, water vapor is reduced into hydrogen, and hydrogen send synthetic ammonia workshop section in proportion, and the temperature of umformer remains on 527 ± 30 ℃.
(8) circulation: the reduction of first, second and third umformer, blow off, three process circulations of oxidation are carried out.
2, the technology of production syngas for synthetic ammonia according to claim 1 is characterized in that: the water vapor that gas fired-boiler produced is (25 kilograms/millimeter of middle pressures
2) steam, send steam turbine power generation workshop section, part is used to produce H2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105279 CN1014419B (en) | 1987-07-29 | 1987-07-29 | Produce the technology of syngas for synthetic ammonia with space gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105279 CN1014419B (en) | 1987-07-29 | 1987-07-29 | Produce the technology of syngas for synthetic ammonia with space gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030930A CN1030930A (en) | 1989-02-08 |
| CN1014419B true CN1014419B (en) | 1991-10-23 |
Family
ID=4815269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105279 Expired CN1014419B (en) | 1987-07-29 | 1987-07-29 | Produce the technology of syngas for synthetic ammonia with space gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014419B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047329C (en) * | 1995-07-21 | 1999-12-15 | 中国科学院化学研究所 | Multi dentate heterodesmic Rh catalyst and its prepn. method |
| CN101391746B (en) * | 2007-09-17 | 2010-12-22 | 上海标氢气体技术有限公司 | Small-sized coal gasification hydrogen making method |
| CN101767781B (en) * | 2009-01-04 | 2012-12-19 | 马叔骥 | Circulation process for treating tail gas pollution of heat-engine plant and preparing ammonium phosphate and sulphuric acid byproducts |
| CN109028123B (en) * | 2018-07-10 | 2019-08-27 | 哈尔滨锅炉厂有限责任公司 | Coal dust-biomass boiler steam coupling transformation method |
-
1987
- 1987-07-29 CN CN 87105279 patent/CN1014419B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030930A (en) | 1989-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |