CN102603453B - Device and method for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace - Google Patents
Device and method for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace Download PDFInfo
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- CN102603453B CN102603453B CN201210033405.6A CN201210033405A CN102603453B CN 102603453 B CN102603453 B CN 102603453B CN 201210033405 A CN201210033405 A CN 201210033405A CN 102603453 B CN102603453 B CN 102603453B
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- Prior art keywords
- gas
- decarbonization
- methanation
- decarburization
- heat exchanger
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title abstract description 11
- 238000005261 decarburization Methods 0.000 title abstract description 10
- 230000015572 biosynthetic process Effects 0.000 title abstract description 3
- 238000003786 synthesis reaction Methods 0.000 title abstract description 3
- 238000005262 decarbonization Methods 0.000 claims description 61
- 239000007789 gas Substances 0.000 abstract description 107
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003054 catalyst Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 150000002431 hydrogen Chemical class 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 208000005374 Poisoning Diseases 0.000 description 1
- 208000005735 Water intoxication Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000010181 polygamy Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
Abstract
The invention belongs to the field of chemical equipment, relating to a device for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace, comprising a decarburization gas preheater, a gas-gas heat exchanger, a decarburization gas heat exchanger and a methanation furnace which are orderly communicated with each other from front to back by a decarburization gas pipe; a heat source inlet of the decarburization gas preheater is connected with a low-variation gas input pipe; the heat source inlet of the gas-gas heat exchanger is connected with an outlet of the methanation furnace by a methanation gas input pipe; the heat source inlet of the decarburization gas heat exchanger is connected with a middle-variation gas input pipe by a valve, a heat source outlet is connected with a middle-variation gas output pipe, the middle-variation gas input pipe is connected with the middle-variation output pipe by a decarburization gas heat exchanger subline. According to the invention the device is used conveniently, and the device effectively increases the temperature of the decarburization gas, saves energy, reduces cost, does not consume hydrogen, does not generate water and methane influencing the catalyst, avoids disadvantage of carbon distribution method and does not need extra heat and electricity as heat source so as to greatly reduce the cost.
Description
Technical field
The invention belongs to chemical industry equipment field, relate to a kind of device that improves synthetic ammonia methanation furnace entrance decarbonization gas temperature.
Background technology
Due to low changing air CO content 0.1% after decarbonization device, CO
2content 0.1%, enter methanation furnace can reactant very little, heater outlet temperature is too low, cannot, by the decarbonization gas that enters methanation furnace more than gas-gas heat exchanger heat exchange to 300 ℃, cannot activate methanation furnace inner catalyst, just can not be by CO, CO in methanation gas
2content is controlled in 10ppm, and ammonia synthesis catalyst just may poisoning and deactivation.Common way has following two kinds:
CO will be contained before decarburization
2higher part low changing air is scurried in decarbonization gas, makes methanation reaction have enough raw materials, improves methanation furnace outlet methanation temperature degree, makes into the decarbonization gas of methanation furnace, more than gas-gas heat exchanger heat exchange to 300 ℃, to meet methanation reaction temperature condition.Here it is so-called " joining carbon method ".This method will consume a large amount of H
2, and generate useless de-rare gas element--the methane that only also may not make the water of synthetic catalyst water intoxication and affect synthetic catalyst activity.
With electric furnace or make the interchanger of thermal source with steam, to decarbonization gas heating, make into more than the decarbonization gas heat exchange to 300 of methanation furnace ℃, this method is wanted additional heat energy or electric energy, and cost obviously improves.
Summary of the invention
The present invention is in order to make up the deficiencies in the prior art, provide a kind of simple in structure, easy to use, effectively improve decarbonization gas temperature, save the device of the raising synthetic ammonia methanation furnace entrance decarbonization gas temperature of hydrogen and expense.
The present invention is achieved through the following technical solutions:
The device of raising synthetic ammonia methanation furnace entrance decarbonization gas temperature of the present invention, its special character is: comprise the decarbonization gas preheater, gas-gas heat exchanger, decarbonization gas interchanger and the methanation furnace that are communicated with successively from front to back by decarbonization gas pipeline; The thermal source entrance of decarbonization gas preheater connects low changing air input tube, and its thermal source outlet connects low changing air output tube; The thermal source entrance of gas-gas heat exchanger connects methanation furnace outlet by methanation gas input tube, and its thermal source outlet connects methanation gas output tube; The thermal source entrance of decarbonization gas interchanger becomes gas input tube in connecting by valve, during its thermal source outlet connects, becomes gas output tube, between middle change gas input tube and middle change gas output tube, is also connected with decarbonization gas interchanger by-pass, on decarbonization gas interchanger by-pass, is also provided with valve.
The method of raising synthetic ammonia methanation furnace entrance decarbonization gas temperature of the present invention, its special character is: the first low changing air heat exchange intensification with 190 ℃ by decarbonization gas preheater of low temperature decarbonization gas, heat up by the methanation gas heat exchange of gas-gas heat exchanger and 305 ℃ again, then in the part by decarbonization gas interchanger and 365 ℃, become gas heat exchange and be warmed up to more than 300 ℃.
The invention has the beneficial effects as follows, simple in structure, easy to use, effectively improve decarbonization gas temperature, save energy and expense, do not need to consume hydrogen, water and the methane of catalyzer can not exert an influence, avoid joining the shortcoming of carbon method, do not need extra heat energy and electric energy to do thermal source, greatly saved expense, reduced cost yet.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, in 1 decarbonization gas preheater, 2 gas-gas heat exchangers, 3 decarbonization gas interchanger, 4 methanation furnaces, 5 decarbonization gas pipelines, 6 low changing air input tubes, 7 low changing air output tubes, 8 methanation gas input tubes, 9 methanation gas output tubes, 10, become and in gas input tube, 11, become gas output tube, 12 decarbonization gas interchanger by-passes.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
The device of raising synthetic ammonia methanation furnace entrance decarbonization gas temperature of the present invention, comprises the decarbonization gas preheater 1, gas-gas heat exchanger 2, decarbonization gas interchanger 3 and the methanation furnace 4 that are communicated with successively from front to back by decarbonization gas pipeline 5; The thermal source entrance of decarbonization gas preheater 1 connects low changing air input tube 6, and its thermal source outlet connects low changing air output tube 7; The thermal source entrance of gas-gas heat exchanger 2 connects methanation furnace 4 by methanation gas input tube 8 and exports, and its thermal source outlet connects methanation gas output tube 9; The thermal source entrance of decarbonization gas interchanger becomes gas input tube 10 in connecting by valve, during connecting, its thermal source outlet becomes gas output tube 11, between middle change gas input tube and middle change gas output tube, be also connected with decarbonization gas interchanger by-pass 12, on decarbonization gas interchanger by-pass, be also provided with valve.
The method of raising synthetic ammonia methanation furnace entrance decarbonization gas temperature of the present invention, the first low changing air heat exchange intensification with 190 ℃ by decarbonization gas preheater of low temperature decarbonization gas, heat up by the methanation gas heat exchange of gas-gas heat exchanger and 305 ℃ again, then in the part by decarbonization gas interchanger and 365 ℃, become gas heat exchange and be warmed up to more than 300 ℃.
Decarbonization gas is from decarbonization device.Night in winter, the decarbonization gas of 2.5 ℃ was by decarbonization gas preheater and the low change outlet of still low changing air heat exchange of 190 ℃, can reach 160 ℃, then exported the heat exchange to 270 ℃ of methanation gas by the methanation furnace of gas-gas heat exchanger and 305 ℃, also differed from 25 ℃ and do not reach 300 ℃.So increase again a decarbonization gas interchanger after gas-gas heat exchanger, allow become in the part of the decarbonization gas of 270 ℃ and 365 ℃ in outlet, become more than gas heat exchange to 300 ℃ high temperature, then high temperature decarbonization gas enters methanation furnace.
The device of raising synthetic ammonia methanation furnace entrance decarbonization gas temperature of the present invention, the thermal source of decarbonization gas preheater is taken from low change stove low changing air out, and after heat exchange, low changing air is gone to recirculated water pre-cooler.The thermal source of gas-gas heat exchanger is taken from methanation furnace methanation gas out, and after heat exchange, methanation gas is gone to de-salted water preheater.The thermal source of decarbonization gas interchanger is taken from middle change outlet of still and is become gas, and after heat exchange, the middle gas that becomes is gone to middle pressure waste-heat recovery device.The thermal source of decarbonization gas interchanger is taken from middle change outlet of still part and is become gas, and by valve control, decarbonization gas interchanger adds by-pass.
Economic benefit:
Methanation furnace design conditions is the decarbonization gas CO content 0.3% into methanation furnace, CO
2content 0.2%.
With joined carbon method polygamy CO 0.2%, CO
20.1%, consume hydrogen more and be calculated as follows:
CO + 3H
2 = CH
4 + H
2O
28 6
58000Nm3×0.2%÷22.4 Nm3 × 28kg= 145kg x
X=145×6÷28=31.07kg
CO
2 + 4H
2 = CH
4 +2H
2O
44 8
58000Nm3×0.1%÷22.4 Nm3 × 44kg= 113.93kg y
y=113.93×8÷44=20.71kg
The existing carbon method of joining adds up to many consumption hydrogen 51.78kg, i.e. 51.78 ÷ 2 x22.4=580 Nm3/h, 1.5 yuan/Nm3 of hydrogen, 870 yuan of many consumptions per hour, 6,960,000 yuan of annual many consumptions.Join the processing costs of exitting of speeding that carbon method also has voluminous water treatment expense, puts because of voluminous methane more, because of the too high loss that affects ammonia transformation efficiency of methane in reaction gas, these parts are than large many of the steam of the few product of the heat changing away because of decarbonization gas interchanger.Therefore the present invention has significantly saved expense and cost.
Claims (1)
1. a device that improves synthetic ammonia methanation furnace entrance decarbonization gas temperature, is characterized in that: comprise the decarbonization gas preheater, gas-gas heat exchanger, decarbonization gas interchanger and the methanation furnace that are communicated with successively from front to back by decarbonization gas pipeline; The thermal source entrance of decarbonization gas preheater connects low changing air input tube, and its thermal source outlet connects low changing air output tube; The thermal source entrance of gas-gas heat exchanger connects methanation furnace outlet by methanation gas input tube, and its thermal source outlet connects methanation gas output tube; The thermal source entrance of decarbonization gas interchanger becomes gas input tube in connecting by valve, during its thermal source outlet connects, becomes gas output tube, between middle change gas input tube and middle change gas output tube, is also connected with decarbonization gas interchanger by-pass, on decarbonization gas interchanger by-pass, is also provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210033405.6A CN102603453B (en) | 2012-02-15 | 2012-02-15 | Device and method for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210033405.6A CN102603453B (en) | 2012-02-15 | 2012-02-15 | Device and method for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace |
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| Publication Number | Publication Date |
|---|---|
| CN102603453A CN102603453A (en) | 2012-07-25 |
| CN102603453B true CN102603453B (en) | 2014-06-11 |
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|---|---|---|---|
| CN201210033405.6A Active CN102603453B (en) | 2012-02-15 | 2012-02-15 | Device and method for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4592860A (en) * | 1984-02-07 | 1986-06-03 | Union Carbide Corporation | Process and apparatus for ammonia synthesis gas production |
| CN1031871C (en) * | 1994-03-18 | 1996-05-29 | 四川省眉山县氮肥厂 | Process for purifying raw gas of ammonia synthesis |
| CN1152022A (en) * | 1996-10-09 | 1997-06-18 | 李经轩 | High-pressure deep purification technology of ammonia-synthesizing material gas |
| CN1313241A (en) * | 2000-03-09 | 2001-09-19 | 衡阳市氮肥厂 | Methanation process for raw gas of synthetic ammonia |
| CN1313240A (en) * | 2000-03-09 | 2001-09-19 | 衡阳市氮肥厂 | High-pressure methanation process for raw gas of synthetic ammonia |
| CN101759147A (en) * | 2008-11-19 | 2010-06-30 | 陶伟平 | Method for purifying and coproducing methanol using synthesis ammonia raw material gas under low pressure |
| CN202465266U (en) * | 2012-02-15 | 2012-10-03 | 山东洪达化工有限公司 | System for increasing decarbonized gas temperature of inlet of synthetic ammonia methanation furnace |
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2012
- 2012-02-15 CN CN201210033405.6A patent/CN102603453B/en active Active
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Effective date of registration: 20240424 Address after: 274700 Yuncheng Chemical Industry Park, Yuncheng County, Heze City, Shandong Province Patentee after: Yuncheng Xuyang Energy Co.,Ltd. Country or region after: China Address before: 274700 Within the Coal Chemical Industrial Park in Yuncheng County, Heze City, Shandong Province Patentee before: SHANDONG HONGDA CHEMICAL Co.,Ltd. Country or region before: China |