CN102145900A - Method for regulating ratio of hydrogen to nitrogen in synthesis ammonia raw material gas - Google Patents
Method for regulating ratio of hydrogen to nitrogen in synthesis ammonia raw material gas Download PDFInfo
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- CN102145900A CN102145900A CN 201110044256 CN201110044256A CN102145900A CN 102145900 A CN102145900 A CN 102145900A CN 201110044256 CN201110044256 CN 201110044256 CN 201110044256 A CN201110044256 A CN 201110044256A CN 102145900 A CN102145900 A CN 102145900A
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Abstract
The invention discloses a method for regulating a ratio of hydrogen to nitrogen in synthesis ammonia raw material gas, which comprises the following steps that low-pressure nitrogen is separated out by an air separation device; the nitrogen is input into a nitrogen tank by a fan with an adjustable rotating speed; the nitrogen in the nitrogen tank enters a coal gas main pipe through a nitrogen outlet valve; the nitrogen and coal gas in the coal gas main pipe are input into a coal gas chamber together and then enter a synthetic tower for reacting after being pressurized in the coal gas chamber and sent to a purifying system to be processed; and according to the hydrogen concentration in recycle gas fed back by the synthetic tower, the rotating speed of the fan is regulated to control the amount of the nitrogen entering the coal gas main pipe so as to regulate the ratio of hydrogen to nitrogen. In the method for regulating the ratio of hydrogen to nitrogen in the synthesis ammonia raw material gas, the nitrogen is directly separated out by the air separation device; the process is simple; the nitrogen inlet amount is controlled by the fan with the adjustable rotating speed; the regulating mode is simple; the nitrogen addition amount is stable; the ratio of hydrogen to nitrogen is stable and can be kept in the range of 61 to 62 percent generally; and the method is beneficial for producing synthesis ammonia.
Description
Technical field
The present invention relates to the method for synthetic ammonia, the control method of hydrogen nitrogen ratio in particularly a kind of syngas for synthetic ammonia.
Background technology
Hydrogen is called for short hydrogen nitrogen ratio with the per-cent of nitrogen in the ammonia-synthesizing material gas.
The ammonia synthesis reaction equation is: N
2+ 3H
2=2NH
3+ Q (Q represents thermopositive reaction)
In Chemical Manufacture, generally be controlled between 2.8～3.2, otherwise will be unfavorable for the carrying out of ammonia synthesis reaction, hydrazine yield is descended.The technology that unstripped gas Central Plains adds nitrogen is: in the gas making operation, air is delivered to gas furnace by gas blower, go into stove from furnace bottom, red-hot charcoal burning back generates and contains carbonic acid gas in wherein airborne oxygen and the stove, carbon monoxide, the coal gas of high temperature of components such as nitrogen, to remove airborne oxygen, coal gas of high temperature is by the tornado dust collector dedusting, carry out the sensible heat recovery then after up gas valve enters the cleaning of gas washing case, enter gas main from the discharge of gas washing case through the gas exit valve, coal gas in gas main feeds gas chamber, adds from gas chamber to enter synthesis system after the force feed purification system is handled and react again.
Length switching time of regulating up gas valve according to density of hydrogen in the circulation gas of synthetic tower feedback.Time is long, and the nitrogen amount that joins in the system is just big, and hydrogen nitrogen ratio will reduce; Otherwise, will increase.This method adopts the mode of intermittently mending high temperature nitrogen, the hydrogen content fluctuation is very big in the circulation gas, generally between 58～68%, adjusting nitrogen amount instability, make the interior hydrogen nitrogen of synthetic tower than unstable, and generate the coal gas of high temperature that contains components such as nitrogen, carbonic acid gas, carbon monoxide after red-hot charcoal burns in oxygen and the gas furnace in the air, because up gas valve is in the state of pass, the stove internal resistance is big, reduce heat storage capacity and promptly reduced gas yield, and the coal gas of high temperature of making also need wash treatment process such as cooling, complex procedures.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of hydrogen nitrogen control method than hydrogen nitrogen ratio in stable, the simple syngas for synthetic ammonia of operation.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The control method of hydrogen nitrogen ratio comprises the steps: in a kind of syngas for synthetic ammonia
Adopt air separation plant to isolate low-pressure nitrogen, adopt the blower fan of adjustable rotating speed that nitrogen is fed in the nitrogen box, nitrogen in the nitrogen box enters gas main by the nitrogen outlet valve, coal gas in gas main feeds gas chamber, add from gas chamber again and enter synthetic tower after the force feed purification system is handled and react, according to density of hydrogen in the circulation gas of synthetic tower feedback, regulate the rotating speed of blower fan and control the nitrogen amount that enters in the gas main, thereby regulate hydrogen nitrogen ratio.
The beneficial effect of the control method of hydrogen nitrogen ratio is in the syngas for synthetic ammonia of the present invention: utilize the air separation facility separated nitrogen, saved the step of in gas furnace, reacting and washing cooling, operation is simple, adopt the blower fan control nitrogen inlet of adjustable rotating speed, regulative mode is simple, and it is stable to add the nitrogen amount, and hydrogen nitrogen is than stable, generally can maintain 61～62%, help the production of synthetic ammonia.
Description of drawings
Fig. 1 is the schema of the control method of hydrogen nitrogen ratio in the syngas for synthetic ammonia of the present invention.
Embodiment
As shown in Figure 1, the control method of hydrogen nitrogen ratio comprises the steps: in the syngas for synthetic ammonia of the present invention
Air is through air separation plant 1, isolate low-pressure nitrogen, adopt the Root's blower 2 of adjustable rotating speed that nitrogen is fed in the nitrogen box 3, nitrogen enters gas main 7 by nitrogen outlet valve 4, coal gas in gas main 7 feeds gas chamber 5, adds to enter in the synthetic tower 6 after force feed purification system (not shown) is handled from gas chamber 5 again and reacts; According to the density of hydrogen of synthetic tower 6 feedback, regulate the rotating speed of Root's blower 2 and control the nitrogen amount that enters in the gas main 7, thereby regulate hydrogen nitrogen ratio.When synthesis system does not need to replenish nitrogen, close nitrogen outlet valve 4, prevent that the coal gas in the gas main 7 is back in the nitrogen box 3.
The control method of hydrogen nitrogen ratio directly utilizes the isolating nitrogen of air separation facility in the syngas for synthetic ammonia of the present invention, saved the step of in gas furnace, reacting and washing cooling, operation is simple, adopt the blower fan control nitrogen inlet of adjustable rotating speed, regulative mode is simple, and it is stable to add the nitrogen amount, and hydrogen nitrogen is than stable, generally can maintain 61～62%, help the production of synthetic ammonia.
Above-described embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (2)
1. the control method of hydrogen nitrogen ratio in the syngas for synthetic ammonia is characterized in that comprising the steps:
Adopt air separation plant to isolate low-pressure nitrogen, adopt the blower fan of adjustable rotating speed that nitrogen is fed in the nitrogen box, nitrogen in the nitrogen box enters gas main by the nitrogen outlet valve, coal gas in gas main feeds gas chamber, add from gas chamber again and enter synthetic tower after the force feed purification system is handled and react, according to density of hydrogen in the circulation gas of synthetic tower feedback, regulate the rotating speed of blower fan and control the nitrogen amount that enters in the gas main, thereby regulate hydrogen nitrogen ratio.
2. the control method of hydrogen nitrogen ratio in the syngas for synthetic ammonia according to claim 1 is characterized in that: described blower fan is a Root's blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110044256 CN102145900A (en) | 2011-02-22 | 2011-02-22 | Method for regulating ratio of hydrogen to nitrogen in synthesis ammonia raw material gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110044256 CN102145900A (en) | 2011-02-22 | 2011-02-22 | Method for regulating ratio of hydrogen to nitrogen in synthesis ammonia raw material gas |
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| CN102145900A true CN102145900A (en) | 2011-08-10 |
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| CN 201110044256 Pending CN102145900A (en) | 2011-02-22 | 2011-02-22 | Method for regulating ratio of hydrogen to nitrogen in synthesis ammonia raw material gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830727A (en) * | 2012-09-05 | 2012-12-19 | 浙江中控技术股份有限公司 | Optimized control system and method of synthetic ammonia hydrogen nitrogen ratio |
| CN103011197A (en) * | 2012-12-14 | 2013-04-03 | 安徽蓝德三元智能***集成有限公司 | Production device of synthesis ammonia and hydrogen-nitrogen ratio control method |
| CN113401920A (en) * | 2021-06-25 | 2021-09-17 | 国能经济技术研究院有限责任公司 | CO based on iodine-sulfur semi-open cycle hydrogen production2Zero-emission ammonia synthesis system, method and application |
| CN114414705A (en) * | 2022-03-29 | 2022-04-29 | 南京霍普斯科技有限公司 | Gas chromatography detection system and method for constant nitrogen and hydrogen in synthetic ammonia |
| CN115286010A (en) * | 2022-08-19 | 2022-11-04 | 北京凯米优化科技有限公司 | Optimization control method and system for hydrogen-nitrogen ratio of tower entering mixed gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0770578A2 (en) * | 1995-10-25 | 1997-05-02 | The M.W. Kellogg Company | Ammonia production with enriched air reforming and nitrogen injection into the synthesis loop |
| CN1940443A (en) * | 2005-09-29 | 2007-04-04 | 林德股份公司 | Purification method for gas mixture |
-
2011
- 2011-02-22 CN CN 201110044256 patent/CN102145900A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0770578A2 (en) * | 1995-10-25 | 1997-05-02 | The M.W. Kellogg Company | Ammonia production with enriched air reforming and nitrogen injection into the synthesis loop |
| CN1940443A (en) * | 2005-09-29 | 2007-04-04 | 林德股份公司 | Purification method for gas mixture |
Non-Patent Citations (2)
| Title |
|---|
| 《化肥设计》 20011231 葛晓霞 合成氨空分改造对总氨的影响 第42页，2.1油制氨生产简述，左栏第一段 1-2 第39卷, 第4期 * |
| 《石油化工动态》 19971031 温福江 90年代合成氨工艺技术的新进展 第35页，2 Linde公司的LAC合成氨新工艺 1-2 第5卷, 第5期 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830727A (en) * | 2012-09-05 | 2012-12-19 | 浙江中控技术股份有限公司 | Optimized control system and method of synthetic ammonia hydrogen nitrogen ratio |
| CN102830727B (en) * | 2012-09-05 | 2014-12-17 | 浙江中控技术股份有限公司 | Optimized control system and method of synthetic ammonia hydrogen nitrogen ratio |
| CN103011197A (en) * | 2012-12-14 | 2013-04-03 | 安徽蓝德三元智能***集成有限公司 | Production device of synthesis ammonia and hydrogen-nitrogen ratio control method |
| CN103011197B (en) * | 2012-12-14 | 2014-11-26 | 安徽蓝德集团股份有限公司 | Hydrogen-nitrogen ratio control method for synthesis ammonia production device |
| CN113401920A (en) * | 2021-06-25 | 2021-09-17 | 国能经济技术研究院有限责任公司 | CO based on iodine-sulfur semi-open cycle hydrogen production2Zero-emission ammonia synthesis system, method and application |
| CN113401920B (en) * | 2021-06-25 | 2022-04-22 | 国能经济技术研究院有限责任公司 | CO based on iodine-sulfur semi-open cycle hydrogen production2Zero-emission ammonia synthesis system, method and application |
| CN114414705A (en) * | 2022-03-29 | 2022-04-29 | 南京霍普斯科技有限公司 | Gas chromatography detection system and method for constant nitrogen and hydrogen in synthetic ammonia |
| CN115286010A (en) * | 2022-08-19 | 2022-11-04 | 北京凯米优化科技有限公司 | Optimization control method and system for hydrogen-nitrogen ratio of tower entering mixed gas |
| CN115286010B (en) * | 2022-08-19 | 2024-03-22 | 北京凯米优化科技有限公司 | Optimizing control method and system for hydrogen-nitrogen ratio of mixed gas entering tower |
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Application publication date: 20110810 |