CN102965154B - Improved ultrahigh-pressure nitrogen and carbon dioxide switching method - Google Patents
Improved ultrahigh-pressure nitrogen and carbon dioxide switching method Download PDFInfo
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- CN102965154B CN102965154B CN201210541125.6A CN201210541125A CN102965154B CN 102965154 B CN102965154 B CN 102965154B CN 201210541125 A CN201210541125 A CN 201210541125A CN 102965154 B CN102965154 B CN 102965154B
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Abstract
The invention discloses an improved ultrahigh-pressure nitrogen and carbon dioxide switching method, which comprises the following operation steps: (a) during start-up, closing a first hand valve on an ultrahigh-pressure carbon dioxide pipeline and a fourth hand valve on an auxiliary line, opening a second hand valve, a third hand valve and a switching valve, slowly opening a regulating valve to introduce gas slowly, and stopping regulation after the pressure of a pipeline at a gas feed end of an ultrahigh-pressure nitrogen conveying pipeline becomes the same as that of an output pipeline subjected to heat exchange by a heat exchanger; (b) in a work condition of switching ultrahigh-pressure carbon dioxide by a system, directly closing the switching valve, then slowly opening the first hand valve to introduce the ultrahigh-pressure carbon dioxide into the system, and closing the regulating valve to complete a switching process; and (c) when a carbon dioxide compressor is in a halt, directly opening the switching valve, slowly opening the regulating valve to introduce the ultrahigh-pressure nitrogen into the system, and then closing the first hand valve. By means of the improvement, the problem of system halt caused by low gas reverse speed is avoided.
Description
Technical field
The present invention relates to shell gasification furnace nitrogen, carbon dioxide synergic system.More particularly to gasification furnace, double-section dry coal powder
The nitrogen of gasification furnace, carbon dioxide changing method.
Background technology
SHELL dry coal powder gasification techniques are researched and developed successfully the seventies in last century by Holland, and are successfully applied to thermoelectricity connection
Product project, the mid-90 introduces China, has had 23 sets of gasification furnaces to settle China at present, and the introduction of the technology is to China's coalification
Work industry has extremely far-reaching influence.The gasification furnace is, with coal dust and oxygen as raw material, to be mainly used to production industrial chemicals and close
It is in the field of business with remarkable advantages such as single stove production capacity big, gasification efficiency is high, safety and environmental protection into gas and industrial fuel gas
Have and significantly strive advantage and promotion potential unexpectedly.
The punching press of shell gasification systems, and solid material conveying is completed using nitrogen or carbon dioxide gas.Coal gasification
The driving initial stage, because downstream synthesis ammonia and methyl alcohol operation do not possess driving condition, therefore, punching press needed for system and material conveying are adopted
Nitrogen is sent with space division, once downstream produces qualified carbon dioxide, gasification system inside punching course and solid material conveying
Switch to send carbon dioxide to replace by synthesizing ammonia methyl alcohol operation.Former plugging and regulation are controlled by live hand valve, and operation is very not
It is convenient, and after carbon-dioxide gas compressor jumps car, easily occur causing coal gasification apparatus to jump the accident of car not in time due to falling gas,
Therefore the modification of flow is imperative.
The content of the invention
Shortcoming it is an object of the invention to overcome prior art, there is provided a kind of to avoid causing slowly because of the degree of falling gas velocity
System jumps car problem, while also prevented super-pressure carbon dioxide gas string to a kind of improved of accident generation of space division system surpassing
High pressure nitrogen, carbon dioxide changing method.
The technical scheme is that：
The super-pressure nitrogen of a modification of the present invention, carbon dioxide changing method, on super-pressure nitrogen delivery pipe line
Connect and the main track that the by-pass of the 4th hand valve is arranged in parallel is installed thereon, installed successively along airintake direction on described main track
There are the 3rd hand valve, switch valve, regulating valve and second-hand's valve, specific operating procedure is：
A the 4th hand valve on first-hand valve and by-pass that () is closed on super-pressure carbon dioxide pipeline when driving, opens
Second-hand's valve, the 3rd hand valve and switch valve, slowly open regulating valve, slowly connect gas, treat supplying gas for super-pressure nitrogen delivery pipe line
After export pipeline pressure of the end pipe line pressure after being exchanged heat through heat exchanger is identical, stop regulation；
B (), when system switches super-pressure carbon dioxide gas operating mode, then direct closing switch valve is slowly opened first-hand
Valve, system is introduced by super-pressure carbon dioxide, closes regulating valve, completes handoff procedure；
C () directly opens switch valve when carbon-dioxide gas compressor jumps car, slowly open regulating valve, and super-pressure nitrogen is drawn
Enter system, be then shut off first-hand valve.
Improved more than, do not existed during gas, in the case that two kinds of compositions are unstable, it is to avoid because of the degree of falling gas velocity
The slow system for causing jumps car problem, while also prevented super-pressure carbon dioxide gas string to the accident of space division system occur, to rear
The stabilization of portion's system brings guarantee.
Brief description of the drawings
Accompanying drawing is super-pressure nitrogen, the schematic flow sheet of carbon dioxide changing method for realizing a modification of the present invention.
Specific embodiment
The super-pressure nitrogen of a modification of the present invention, carbon dioxide changing method, superelevation is carried out in space division as shown in drawings
Increase the 3rd hand valve, switch valve, regulating valve and second-hand's valve on pressure nitrogen delivery pipe line to be adjusted as main track.By original hand valve 6
Adjusted as by-pass.Ensure two kinds of speed of source of the gas switching.
The super-pressure nitrogen of a modification of the present invention, carbon dioxide changing method, on super-pressure nitrogen delivery pipe line
Connect and the main track that the by-pass of the 4th hand valve is arranged in parallel is installed thereon, installed successively along airintake direction on described main track
There are the 3rd hand valve, switch valve, regulating valve and second-hand's valve, specific operating procedure is：A () closes super-pressure dioxy when driving
Change the 4th hand valve 6 on the first-hand valve 1 and by-pass on carbon pipeline, open second-hand's valve 2, the 3rd hand valve 5 and switch valve 4, delay
It is slow to open regulating valve 3, gas is slowly connect, after being exchanged heat after the aspirating end line pressure of super-pressure nitrogen delivery pipe line and through heat exchanger 9
Export pipeline pressure it is identical after (super-pressure nitrogen delivery pipe line and through heat exchanger exchange heat after export pipeline on be respectively provided with
First pressure table 8, second pressure table 7 are used to reading), stop regulation；B () switches super-pressure carbon dioxide gas operating mode in system
When, then direct closing switch valve 4 slowly opens first-hand valve 1, and super-pressure carbon dioxide is introduced into system, closes regulating valve
3, complete handoff procedure.C () is straight to open switch valve 4, slow opening regulating valve 3, by superelevation when carbon-dioxide gas compressor jumps car
Pressure nitrogen introduces system, is then shut off first-hand valve 1.
Embodiment 1
Connected on super-pressure nitrogen delivery pipe line and the main track that the by-pass of the 4th hand valve is arranged in parallel is installed thereon,
The 3rd hand valve, switch valve, regulating valve and second-hand's valve are sequentially installed with along airintake direction on described main track, specific operation step
Suddenly it is：
A the 4th hand valve 6 on first-hand valve 1 and by-pass that () is closed on super-pressure carbon dioxide pipeline when driving, beats
Second-hand's valve 2, the 3rd hand valve 5 and switch valve 4 are driven, it is slow to open regulating valve 3, gas is slowly connect, treat super-pressure nitrogen delivery pipe line
Export pipeline pressure of the aspirating end line pressure after being exchanged heat through heat exchanger 9 it is identical after (the i.e. value of first pressure table 8 and second
The value of pressure gauge 7 is consistent), stop regulation；
B (), when system switches super-pressure carbon dioxide gas operating mode, direct closing switch valve 4 is then slow to open first
Hand valve 1, system is introduced by super-pressure carbon dioxide, closes regulating valve 3, completes handoff procedure；
C () is straight to open switch valve 4, slow opening regulating valve 3, by super-pressure nitrogen when carbon-dioxide gas compressor jumps car
Introducing system, is then shut off first-hand valve 1.Second pressure table 7 is not below 6.5Mpa, it is ensured that system stable operation.
Using this method, in the absence of the situation that two kinds of compositions are unstable during gas, it is to avoid because the degree of falling gas velocity draws slowly
The system for rising jumps car problem, while also prevented super-pressure carbon dioxide gas string to the accident of space division system occur, to rear portion system
The stabilization of system brings guarantee.
Claims (1)
1. a kind of improved super-pressure nitrogen, carbon dioxide changing method, it is characterised in that：On super-pressure nitrogen delivery pipe line
Connect and the main track that the by-pass of the 4th hand valve is arranged in parallel is installed thereon, installed successively along airintake direction on described main track
There are the 3rd hand valve, switch valve, regulating valve and second-hand's valve, specific operating procedure is：
A the 4th hand valve on first-hand valve and by-pass that () is closed on super-pressure carbon dioxide pipeline when driving, opens second
Hand valve, the 3rd hand valve and switch valve, slowly open regulating valve, slowly connect gas, treat the end pipe of supplying gas of super-pressure nitrogen delivery pipe line
After export pipeline pressure of the line pressure after being exchanged heat through heat exchanger is identical, stop regulation；
B (), when system switches super-pressure carbon dioxide gas operating mode, then direct closing switch valve slowly opens first-hand valve,
Super-pressure carbon dioxide is introduced into system, regulating valve is closed, handoff procedure is completed；
C () directly opens switch valve when carbon-dioxide gas compressor jumps car, slowly open regulating valve, and super-pressure nitrogen is introduced into system
System, is then shut off first-hand valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210541125.6A CN102965154B (en) | 2012-12-12 | 2012-12-12 | Improved ultrahigh-pressure nitrogen and carbon dioxide switching method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210541125.6A CN102965154B (en) | 2012-12-12 | 2012-12-12 | Improved ultrahigh-pressure nitrogen and carbon dioxide switching method |
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| Publication Number | Publication Date |
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| CN102965154A CN102965154A (en) | 2013-03-13 |
| CN102965154B true CN102965154B (en) | 2017-05-24 |
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| CN201210541125.6A Active CN102965154B (en) | 2012-12-12 | 2012-12-12 | Improved ultrahigh-pressure nitrogen and carbon dioxide switching method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277629A (en) * | 1997-06-06 | 2000-12-20 | 德士古发展公司 | Oxygen flow control for gasification |
| CN1721511A (en) * | 2005-07-01 | 2006-01-18 | 煤炭科学研究总院北京煤化工研究分院 | Process for pressurized gasification of dry coal fines |
| CN102041105A (en) * | 2011-01-25 | 2011-05-04 | 河南龙宇煤化工有限公司 | Method for performing depressurized sweeping on gasification furnace |
| JP2011105843A (en) * | 2009-11-17 | 2011-06-02 | Hitachi Ltd | Gasification system and method for operating the same |
| CN102517086A (en) * | 2011-11-28 | 2012-06-27 | 河南龙宇煤化工有限公司 | Method for using carbon dioxide as delivery gas and back flushing gas of coal powder instead of nitrogen in coal gasification methanol preparation process |
| CN102618332A (en) * | 2011-12-23 | 2012-08-01 | 航天长征化学工程股份有限公司 | Starting/stopping control method and system for powdered coal pressure gasification device |
-
2012
- 2012-12-12 CN CN201210541125.6A patent/CN102965154B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277629A (en) * | 1997-06-06 | 2000-12-20 | 德士古发展公司 | Oxygen flow control for gasification |
| CN1721511A (en) * | 2005-07-01 | 2006-01-18 | 煤炭科学研究总院北京煤化工研究分院 | Process for pressurized gasification of dry coal fines |
| JP2011105843A (en) * | 2009-11-17 | 2011-06-02 | Hitachi Ltd | Gasification system and method for operating the same |
| CN102041105A (en) * | 2011-01-25 | 2011-05-04 | 河南龙宇煤化工有限公司 | Method for performing depressurized sweeping on gasification furnace |
| CN102517086A (en) * | 2011-11-28 | 2012-06-27 | 河南龙宇煤化工有限公司 | Method for using carbon dioxide as delivery gas and back flushing gas of coal powder instead of nitrogen in coal gasification methanol preparation process |
| CN102618332A (en) * | 2011-12-23 | 2012-08-01 | 航天长征化学工程股份有限公司 | Starting/stopping control method and system for powdered coal pressure gasification device |
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| CN102965154A (en) | 2013-03-13 |
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Address after: Bohai Port Economic Zone Binhai New Area 300452 Tianjin city ten Road No. 3369 Applicant after: Bo Huayongli chemical inc, Tianjin Address before: 300452 Tanggu Port Industrial Zone, Tanggu District, Bohai, No., No. ten road, No. 3369 Applicant before: Tianjin Alkali Plant, Bohai Chemical Co., Ltd, Tianjin |
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