CN204848289U - Ammonia converter waste heat recovery utilizes system - Google Patents
Ammonia converter waste heat recovery utilizes system Download PDFInfo
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- CN204848289U CN204848289U CN201520661480.6U CN201520661480U CN204848289U CN 204848289 U CN204848289 U CN 204848289U CN 201520661480 U CN201520661480 U CN 201520661480U CN 204848289 U CN204848289 U CN 204848289U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model discloses an ammonia converter waste heat recovery utilizes system, including the ammonia converter, the synthetic gas export of ammonia converter links to each other with synthetic medium pressure boiler's synthetic gas air inlet, the steam that synthetic medium pressure boiler came out removes heat transfer formula reborner through the middle pressure steam pipe network, synthetic medium pressure boiler's synthetic gas gas outlet links to each other with synthetic time medium pressure boiler's synthetic gas air inlet, synthetic time medium pressure boiler's synthetic gas gas outlet links to each other with the import of the heat source of feed water preheater, hot water after the feed water preheater preheats exports synthetic medium pressure boiler and synthetic time medium pressure boiler through the feed water, the heat source export of feed water preheater links to each other with the heat source import of business turn over tower heat exchanger. The utility model discloses make the waste heat of synthetic gas obtain abundant reasonable application, for whole ammonia synthesis technology provides technology steam, guarantee the steady operation of ammonia synthesis technology, play energy saving and emission reduction's effect.
Description
Technical field
The utility model relates to the ammonia synthesis converter synthetic gas waste heat recycling system in a kind of ammonia synthesis process.
Background technology
Synthetic ammonia another name ammonia, molecular formula NH
3.Refer to the ammonia directly synthesized in the presence of the catalyst at elevated temperature and pressure by nitrogen and hydrogen.Ammonia is in the world except reclaiming from coke(oven)gas except by-product on a small quantity, and the overwhelming majority is the ammonia of synthesis.Synthetic ammonia is mainly used as chemical fertilizer, refrigerant and industrial chemicals.
Synthetic ammonia is mainstay of the national economy industry, and it is the first that output occupies various Chemicals, and be also major power consumer, the energy of nearly 10% is for the synthesis of ammonia in the world simultaneously.Along with the energy, the increasingly sharpening of environment Double jeopardy, the energy-saving and emission-reduction of synthetic ammonia installation are imperative.
The whole technique of synthetic ammonia is: Sweet natural gas and water vapor are generated hydrogen through catalyzed reaction, hydrogen again with the nitrogen in air in ammonia synthesis converter under the existence of High Temperature High Pressure and catalyzer synthetic ammonia.
Synthetic ammonia installation steam system is generally divided into medium pressure steam system (3.5-4.2MPaG, 240-255 DEG C), secondary medium pressure steam system (2.2-2.5MPaG, 220-226 DEG C), steam vapour system (< 0.42MPaG, 100-144.7 DEG C), wherein middle pressure steam is used as process steam, namely react with Sweet natural gas and generate hydrogen, mainly fire with the high boiler that becomes by transforming boiler at present, energy consumption is high.
Low-pressure steam (< 0.42MPaG, 100-144.7 DEG C), uses as system tracing thermal-insulating and boiler water deaeration.
The temperature of the synthetic gas (containing ammonia, unreacted nitrogen and hydrogen) of ammonia synthesis converter outlet is 380-400 DEG C, at present not used for production middle pressure steam, is unfavorable for energy-saving and emission-reduction.
Utility model content
In order to solve the problems of the technologies described above, the ammonia synthesis converter waste heat recycling system of the waste heat of the synthetic gas that the utility model provides a kind of more Appropriate application ammonia synthesis converter to export.
To achieve these goals, the technical solution of the utility model is as follows: a kind of ammonia synthesis converter waste heat recycling system, comprise ammonia synthesis converter, it is characterized in that: the syngas outlet of described ammonia synthesis converter is connected with the synthetic gas inlet mouth of synthesis medium pressure boiler, described synthesis medium pressure boiler middle pressure steam out removes heat-exchanged reformer through middle pressure steam pipe network, the synthetic gas air outlet of described synthesis medium pressure boiler is connected with the synthetic gas inlet mouth of synthesis time medium pressure boiler, the described synthesis time synthetic gas air outlet of medium pressure boiler is connected with the thermal source import of feed water preheater, feedwater after described feed water preheater preheating exports to synthesis medium pressure boiler and synthesis time medium pressure boiler through feedwater, the thermal source outlet of described feed water preheater is connected with the thermal source import of turnover tower interchanger, circulation gas through the preheating of described turnover tower interchanger enters ammonia synthesis converter and reacts.
In such scheme: the steam of described synthesis time medium pressure boiler enters time middle pressure steam pipe network.
Adopt such scheme, ammonia synthesis converter synthetic gas out (temperature 380-400 DEG C), through synthesis medium pressure boiler, produces middle pressure steam (3.5-4.2MPaG, 240-255 DEG C), for process steam.First enter synthesis time medium pressure boiler from synthesis medium pressure boiler synthetic gas out, produce time middle pressure steam (2.2-2.5MPaG, 220-226 DEG C), outer defeated.Then synthetic gas enters feed water preheater, carries out preheating to boiler feed water.Last synthetic gas enters turnover tower interchanger, enters ammonia synthesis converter after the hydrogen in circulation gas and nitrogen are carried out preheating, and last synthetic gas anhydrates cooler, synthetic gas is carried out to the subsequent operationss such as refrigerated separation purification.By the middle pressure steam produced the utilization of synthetic ammonia synthetic gas waste heat, go heat-exchanged reformer to produce hydrogen as process steam, reach the object of the abundant Appropriate application of waste heat.Ensure the steady running of production system, energy-saving and emission-reduction.
Beneficial effect: the synthetic gas of ammonia synthesis converter is passed through synthesis medium pressure boiler, synthesis time medium pressure boiler, feed water preheater and turnover tower interchanger by the utility model successively, the waste heat of synthetic gas is adequately and reasonably used, for whole ammonia synthesis technology provides process steam, ensure the steady running of ammonia synthesis technology, play the effect of energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Embodiment 1, as shown in Figure 1: ammonia synthesis converter waste heat recycling system of the present utility model is made up of parts such as ammonia synthesis converter 1, synthesis medium pressure boiler 2, synthesis time medium pressure boiler 3, feed water preheater 4, turnover tower interchanger 5, heat-exchanged reformer 6, secondary middle pressure steam pipe network 7, middle pressure steam pipe networks 8.
The structure of ammonia synthesis converter 1 is prior art, does not repeat at this.
The structure of synthesis medium pressure boiler 2 and synthesis time medium pressure boiler 3 is also boiler of the prior art, and synthesis medium pressure boiler 2 is different with the pressure of the generation steam that synthesis time medium pressure boiler 3 sets.
The syngas outlet of ammonia synthesis converter 1 is connected with the synthetic gas inlet mouth of synthesis medium pressure boiler 2, the waste heat of the synthetic gas of ammonia synthesis converter 1 is utilized to heat the water in synthesis medium pressure boiler 2, produce middle pressure steam (3.5-4.2MPaG, 240-255 DEG C), synthesis medium pressure boiler 2 middle pressure steam out removes heat-exchanged reformer 6 through middle pressure steam pipe network 8, react with Sweet natural gas in heat-exchanged reformer 6 and generate hydrogen, carbon monoxide and carbonic acid gas, the synthetic gas air outlet of synthesis medium pressure boiler 2 is connected with the synthetic gas inlet mouth of synthesis time medium pressure boiler 3, the waste heat of synthetic gas continues to heat the water in synthesis time medium pressure boiler 3, secondary middle pressure steam (the 2.2-2.5MPaG of synthesis time medium pressure boiler 3, 220-226 DEG C) enter time middle pressure steam pipe network 7, this time middle pressure steam is outer defeated.The synthesis time synthetic gas air outlet of medium pressure boiler 3 is connected with the thermal source import of feed water preheater 4, now synthetic gas enters feedwater heat retrieving apparatus 4, preheating is carried out to water, feedwater after feed water preheater 4 preheating through hot water outlet to synthesis medium pressure boiler 2 and synthesis time medium pressure boiler 3, the thermal source outlet of feed water preheater 4 is connected with the thermal source import of turnover tower interchanger 5, synthetic gas enters turnover tower interchanger 5 again, carry out preheating to the hydrogen in circulation gas and nitrogen, the hydrogen in the circulation gas of turnover tower interchanger 5 preheating and nitrogen enter ammonia synthesis converter 1 and react.
The utility model is not limited to above-mentioned specific embodiment, should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.In a word, all technician in the art according to design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should by the determined protection domain of claims.
Claims (2)
1. an ammonia synthesis converter waste heat recycling system, comprise ammonia synthesis converter (1), it is characterized in that: the syngas outlet of described ammonia synthesis converter (1) is connected with the synthetic gas inlet mouth of synthesis medium pressure boiler (2), described synthesis medium pressure boiler (2) middle pressure steam out removes heat-exchanged reformer (6) through middle pressure steam pipe network, the synthetic gas air outlet of described synthesis medium pressure boiler (2) is connected with the synthetic gas inlet mouth of synthesis time medium pressure boiler (3), the synthetic gas air outlet of described synthesis time medium pressure boiler (3) is connected with the thermal source import of feed water preheater (4), feedwater after described feed water preheater (4) preheating exports to synthesis medium pressure boiler (2) and synthesis time medium pressure boiler (3) through feedwater, the thermal source outlet of described feed water preheater (4) is connected with the thermal source import of turnover tower interchanger (5), circulation gas through the preheating of described turnover tower interchanger (5) enters ammonia synthesis converter (1) and reacts.
2. ammonia synthesis converter waste heat recycling system according to claim 1, is characterized in that: the steam of described synthesis time medium pressure boiler (3) enters middle pressure steam pipe network (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520661480.6U CN204848289U (en) | 2015-08-28 | 2015-08-28 | Ammonia converter waste heat recovery utilizes system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520661480.6U CN204848289U (en) | 2015-08-28 | 2015-08-28 | Ammonia converter waste heat recovery utilizes system |
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| CN204848289U true CN204848289U (en) | 2015-12-09 |
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| CN201520661480.6U Active CN204848289U (en) | 2015-08-28 | 2015-08-28 | Ammonia converter waste heat recovery utilizes system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021132126A1 (en) * | 2019-12-25 | 2021-07-01 | 三菱重工業株式会社 | Ammonia derivative production plant and production method for ammonia derivative |
| CN116239127A (en) * | 2023-02-15 | 2023-06-09 | 中国成达工程有限公司 | Synthetic ammonia hot standby process and synthetic tower |
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2015
- 2015-08-28 CN CN201520661480.6U patent/CN204848289U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021132126A1 (en) * | 2019-12-25 | 2021-07-01 | 三菱重工業株式会社 | Ammonia derivative production plant and production method for ammonia derivative |
| JP2021102532A (en) * | 2019-12-25 | 2021-07-15 | 三菱重工業株式会社 | Plant for producing ammonia derivative and method for producing ammonia derivative |
| JP7353163B2 (en) | 2019-12-25 | 2023-09-29 | 三菱重工業株式会社 | Ammonia derivative manufacturing plant and ammonia derivative manufacturing method |
| CN116239127A (en) * | 2023-02-15 | 2023-06-09 | 中国成达工程有限公司 | Synthetic ammonia hot standby process and synthetic tower |
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