CN202465266U - System for increasing decarbonized gas temperature of inlet of synthetic ammonia methanation furnace - Google Patents
System for increasing decarbonized gas temperature of inlet of synthetic ammonia methanation furnace Download PDFInfo
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- CN202465266U CN202465266U CN2012200480541U CN201220048054U CN202465266U CN 202465266 U CN202465266 U CN 202465266U CN 2012200480541 U CN2012200480541 U CN 2012200480541U CN 201220048054 U CN201220048054 U CN 201220048054U CN 202465266 U CN202465266 U CN 202465266U
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- gas
- decarbonization
- decarbonized
- heat exchanger
- inlet
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Abstract
The utility model belongs to the field of chemical equipment, and relates to a system for increasing the decarbonized gas temperature of the inlet of a synthetic ammonia methanation furnace. The system comprises a decarbonized gas peheater, a gas-to-gas heat exchanger, a decarbonized gas heat exchanger and the methanation furnace which communicate with one another through decarbonized gas pipelines sequentially from the front to the back; the heat source inlet of the decarbonized gas peheater is connected with a low-temperature shift gas input pipe; the heat source inlet of the gas-to-gas heat exchanger is connected with the outlet of the methanation furnace through a methanated gas input pipe; the heat source inlet of the decarbonized gas heat exchanger is connected with a medium-temperature shift gas input pipe through a valve, the heat source outlet of the decarbonized gas heat exchanger is connected with a medium-temperature shift gas output pipe, and a decarbonized gas heat exchanger bypass is connected between the medium-temperature shift gas input pipe and the medium-temperature shift gas output pipe as well. The system has the advantage that the system is convenient to use, effectively increases the decarbonized gas temperature, saves energy and cost, does not consume hydrogen, cannot produce water and methane affecting catalyst, avoids the defects of the carbon addition method and does not need extra heat energy and electric energy as heat source, so that the cost is greatly saved.
Description
Technical field
The invention belongs to the chemical plant field, relate to a kind of device that improves synthetic ammonia methanation furnace inlet decarbonization gas temperature.
Background technology
Since low changing air CO content 0.1% behind decarbonization device, CO
2Content 0.1%, but advance the methanation furnace reactant very little, and heater outlet temperature is too low, can't with the decarbonization gas that advances methanation furnace more than gas-gas heat exchanger heat exchange to 300 ℃, can't activate the methanation furnace inner catalyst, just can not be with CO, CO in the methane gasification
2Content is controlled in the 10ppm, and ammonia synthesis catalyst just maybe poisoning and deactivation.Common way has following two kinds:
With containing CO before the decarburization
2Higher part low changing air is scurried in the decarbonization gas, makes methanation reaction that enough raw materials arranged, and improves methanation furnace outlet methanation temperature degree, and the decarbonization gas that makes methanation furnace into satisfies the methanation reaction temperature condition more than gas-gas heat exchanger heat exchange to 300 ℃.Here it is so-called " joining the carbon method ".This method will consume a large amount of H
2, and generate useless taking off and also not possibly make the water of synthetic catalyst water intoxication only and influence the active rare gas element of synthetic catalyst--methane.
Make the interchanger of thermal source with electric furnace or with steam, to the decarbonization gas heating, make more than the decarbonization gas heat exchange to 300 ℃ of methanation furnace into, 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 remedy the deficiency of prior art, provide a kind of simple in structure, easy to use, effectively improve the decarbonization gas temperature, practice thrift the device of the raising synthetic ammonia methanation furnace inlet decarbonization gas temperature of hydrogen and expense.
The present invention realizes through following technical scheme:
The device of raising synthetic ammonia methanation furnace inlet decarbonization gas temperature of the present invention, its special character is: comprise through the decarbonization gas pipeline by the decarbonization gas preheater, gas-gas heat exchanger, decarbonization gas interchanger and the methanation furnace that are communicated with successively after going to; The thermal source inlet of decarbonization gas preheater connects the low changing air input tube, and its thermal source outlet connects the low changing air output tube; The thermal source inlet of gas-gas heat exchanger connects the methanation furnace outlet through methane gasification input tube, and its thermal source outlet connects methane gasification output tube; The thermal source inlet of decarbonization gas interchanger becomes the gas input tube in connecting through valve, becomes the gas output tube during its thermal source outlet connects, and also is connected with decarbonization gas interchanger by-pass between middle change gas input tube and the middle change gas output tube, also is provided with valve on the decarbonization gas interchanger by-pass.
During use; The low temperature decarbonization gas is earlier through the low changing air heat exchange intensification of decarbonization gas preheater with 190 ℃; Heat up through gas-gas heat exchanger and 305 ℃ methane gasification heat exchange again, be warmed up to more than 300 ℃ through change gas heat exchange in the part of decarbonization gas interchanger and 365 ℃ then.
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 consuming hydrogen, the water and the methane of the catalyzer that can not exert an influence; Avoided joining the shortcoming of carbon method; Do not need extra heat energy and electric energy to do thermal source yet, practiced thrift expense greatly, reduced cost.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure, become 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 methane gasification input tubes, the 9 methane gasification output tubes, 10 and become gas output tube, 12 decarbonization gas interchanger by-passes in the gas input tube, 11.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
The device of raising synthetic ammonia methanation furnace inlet decarbonization gas temperature of the present invention comprises through decarbonization gas pipeline 5 by the decarbonization gas preheater 1, gas-gas heat exchanger 2, decarbonization gas interchanger 3 and the methanation furnace 4 that are communicated with successively after going to; The thermal source inlet 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 inlet of gas-gas heat exchanger 2 connects methanation furnace 4 outlets through methane gasification input tube 8, and its thermal source outlet connects methane gasification output tube 9; The thermal source inlet of decarbonization gas interchanger becomes gas input tube 10 in connecting through valve; During connecting, its thermal source outlet becomes gas output tube 11; The middle change between gas input tube and the middle change gas output tube also is connected with decarbonization gas interchanger by-pass 12, also is provided with valve on the decarbonization gas interchanger by-pass.
During use; The low temperature decarbonization gas is earlier through the low changing air heat exchange intensification of decarbonization gas preheater with 190 ℃; Heat up through gas-gas heat exchanger and 305 ℃ methane gasification heat exchange again, be warmed up to more than 300 ℃ through change gas heat exchange in the part of decarbonization gas interchanger and 365 ℃ then.
Decarbonization gas is from decarbonization device.Night in winter, 2.5 ℃ decarbonization gas was through decarbonization gas preheater and 190 ℃ low change outlet of still low changing air heat exchange, can reach 160 ℃, and the methanation furnace through gas-gas heat exchanger and 305 ℃ exports methane gasification heat exchange to 270 ℃ again, also differs from 25 ℃ and does not reach 300 ℃.So behind gas-gas heat exchanger, increase a decarbonization gas interchanger again, let become in 270 ℃ the part of decarbonization gas and 365 ℃ become high temperature more than the gas heat exchange to 300 ℃ in the outlet, the high temperature decarbonization gas gets into methanation furnace then.
The device of raising synthetic ammonia methanation furnace inlet decarbonization gas temperature of the present invention, the thermal source of decarbonization gas preheater is taken from the low low changing air that stove comes out that becomes, and low changing air is gone to the recirculated water pre-cooler after the heat exchange.The thermal source of gas-gas heat exchanger is taken from the methane gasification that methanation furnace comes out, and the methane gasification is gone to the de-salted water preheater after the heat exchange.Become in the outlet of still during the thermal source of decarbonization gas interchanger is taken from and become gas, the middle gas that becomes is gone to the middle waste-heat recovery device of pressing after the heat exchange.Become during the thermal source of decarbonization gas interchanger is taken from the outlet of still part and become gas, through valve control, promptly the decarbonization gas interchanger adds by-pass.
Economic benefit:
The methanation furnace design conditions is the decarbonization gas CO content 0.3% of into methanation furnace, CO
2Content 0.2%.
With joined carbon method polygamy CO 0.2%, CO
20.1%, consume hydrogen more and calculate 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 per hour many consumptions, 6,960,000 yuan of annual many consumptions.Join the processing costs of exitting of speeding that the carbon method also has the water treatment expense of fecund, puts because of the methane of fecund more, because of the too high loss that influences the ammonia transformation efficiency of methane in the reaction gas, these parts are lacked big many of the steam of product than the heat that changes away because of the decarbonization gas interchanger.Therefore the present invention has significantly practiced thrift expense and cost.
Claims (1)
1. a device that improves synthetic ammonia methanation furnace inlet decarbonization gas temperature is characterized in that: comprise through the decarbonization gas pipeline by the decarbonization gas preheater, gas-gas heat exchanger, decarbonization gas interchanger and the methanation furnace that are communicated with successively after going to; The thermal source inlet of decarbonization gas preheater connects the low changing air input tube, and its thermal source outlet connects the low changing air output tube; The thermal source inlet of gas-gas heat exchanger connects the methanation furnace outlet through methane gasification input tube, and its thermal source outlet connects methane gasification output tube; The thermal source inlet of decarbonization gas interchanger becomes the gas input tube in connecting through valve, becomes the gas output tube during its thermal source outlet connects, and also is connected with decarbonization gas interchanger by-pass between middle change gas input tube and the middle change gas output tube, also is provided with valve on the decarbonization gas interchanger by-pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200480541U CN202465266U (en) | 2012-02-15 | 2012-02-15 | System for increasing decarbonized gas temperature of inlet of synthetic ammonia methanation furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200480541U CN202465266U (en) | 2012-02-15 | 2012-02-15 | System for increasing decarbonized gas temperature of inlet of synthetic ammonia methanation furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202465266U true CN202465266U (en) | 2012-10-03 |
Family
ID=46913446
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200480541U Withdrawn - After Issue CN202465266U (en) | 2012-02-15 | 2012-02-15 | System for increasing decarbonized gas temperature of inlet of synthetic ammonia methanation furnace |
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|---|---|
| CN (1) | CN202465266U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603453A (en) * | 2012-02-15 | 2012-07-25 | 山东洪达化工有限公司 | Device and method for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace |
| CN103879963A (en) * | 2014-02-20 | 2014-06-25 | 康乃尔化学工业股份有限公司 | Methanation device for optimized production of synthetic ammonia |
-
2012
- 2012-02-15 CN CN2012200480541U patent/CN202465266U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603453A (en) * | 2012-02-15 | 2012-07-25 | 山东洪达化工有限公司 | Device and method for increasing temperature of decarburization gas at inlet of synthesis ammonia methanation furnace |
| CN103879963A (en) * | 2014-02-20 | 2014-06-25 | 康乃尔化学工业股份有限公司 | Methanation device for optimized production of synthetic ammonia |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121003 Effective date of abandoning: 20140611 |
|
| RGAV | Abandon patent right to avoid regrant |