CN102721264A - Carbon monoxide mixture purification system and purification method - Google Patents
Carbon monoxide mixture purification system and purification method Download PDFInfo
- Publication number
- CN102721264A CN102721264A CN2012102282982A CN201210228298A CN102721264A CN 102721264 A CN102721264 A CN 102721264A CN 2012102282982 A CN2012102282982 A CN 2012102282982A CN 201210228298 A CN201210228298 A CN 201210228298A CN 102721264 A CN102721264 A CN 102721264A
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- rectifying column
- heat exchanger
- main heat
- gas
- Prior art date
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910002091 carbon monoxides Inorganic materials 0.000 title claims abstract description 25
- 239000000203 mixtures Substances 0.000 title claims abstract description 14
- 238000000746 purification Methods 0.000 title abstract description 10
- 239000007789 gases Substances 0.000 claims abstract description 63
- 239000007788 liquids Substances 0.000 claims abstract description 37
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 16
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- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound 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O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- 229910002090 carbon oxides Inorganic materials 0.000 claims description 4
- 239000008246 gaseous mixtures Substances 0.000 claims description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitric oxide Chemical compound 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O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 3
- 238000009835 boiling Methods 0.000 abstract description 3
- 280000217307 Pure Carbon companies 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 6
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous Oxide Chemical compound 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- 239000003245 coal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention relates to a carbon monoxide mixture purification system and a purification method. Carbon monoxide feed gas (1) enters a main heat exchanger (E1) via a feed gas supply pipeline (2) to exchange heat with return gas, enters the middle lower part of a rectifying tower (C) after being cooled to the saturation point, rises along with vapor coming from an evaporator (E2), is in direct contact with carbon monoxide return liquid condensed by a top condenser (E3) in the rectifying tower (C), and is rectified, and pure carbon monoxide product which contains less than 100 multiplied by 10 negative 6 CH4 is obtained from the top of the rectifying tower (C). By adopting the principle of low-temperature rectification and utilizing the different boiling points of CO and CH4, the invention separates CH4 from CO by way of internal rectification, thus achieving the purpose of CO purification, and the content of CH4 in CO is reduced from 0.12 to 0.2 percent to less than 100 multiplied by 10 negative 6.
Description
Technical field
The present invention relates to the air separation field, be specifically related to a kind of carbon mono oxide mixture purifying plant and method of purification.
Background technology
Air separation equipment is exactly with air liquefaction, rectifying, finally is separated into the gas separation equipment of oxygen, nitrogen and other valuable gases, is called for short air separation plant.Its minimum operating temperature is 77K.Air once was called as " permanent gas " to 19 end of the centurys, it is found that air also can liquefy under profound hypothermia, and because of oxygen, nitrogen boiling point difference, can from liquefied air, isolate oxygen and nitrogen.First commercial oxygenerator processed in 1903, and it just is used for the gas welding and the cutting of metal at first.At the end of the thirties, nitrogen fertilizer industry needs nitrogen, and oxygenerator develops into can produce oxygen and nitrogen simultaneously, renames as air separation equipment.
" coal-ethylene glycol " promptly replaces oil ethylene production ethylene glycol with coal.The coal-ethylene glycol process unit divides to be made up of following components: gasification installation, purifier, the H2/CO separator that comprises transformation absorption system H2 and CO unit, demethanation unit, oxalate synthesizer, ethylene glycol synthesizer, air separation unit, supporting public work and auxiliary equipment.Wherein in the prior art in the H2/CO separator transformation absorption produce H2 and CO, methane content is 0.12～0.2% among the products C O, synthetic influential to oxalate needs this Control of Impurities 100 * 10 -6In, be difficult to reach target and handle with pressure swing adsorption method, need seek additive method.
Therefore; Provide a kind of simple in structure, easy to operate, technology is easy, energy-conserving and environment-protective, operate steadily, safe and reliable, automaticity is high, product purity is high, equipment is few, low carbon mono oxide mixture purifying plant and the method for purification of investment, has vast market prospect.
Summary of the invention
To the deficiency of prior art, the present invention provide a kind of simple in structure, easy to operate, technology is easy, energy-conserving and environment-protective, operate steadily, safe and reliable, automaticity is high, product purity is high, equipment is few, low carbon mono oxide mixture purifying plant and the method for purification of investment.
Technical scheme of the present invention is such realization: a kind of carbon mono oxide mixture purifying plant; Comprise the saturated nitrogen of feed gas containing carbon monoxide body 1, middle pressure 4, outside liquid nitrogen 12, main heat exchanger E1, rectifying column C, be installed in evaporimeter E2 and condenser E3 in the rectifying column C; Described unstrpped gas 1 is connected with the middle part of rectifying column C through the unstrpped gas conveyance conduit 2 that passes main heat exchanger E1; The saturated nitrogen 4 of middle pressure is through being connected with evaporimeter E2 through the saturated nitrogen pipeline 5 of middle pressure that passes main heat exchanger E1; Evaporimeter E2 is connected with rectifying column C top through liquid nitrogen pipes 6, is provided with product gas output channel 3 in rectifying column C middle and upper part, and product gas output channel 3 passes main heat exchanger E1 and is connected with product gathering-device 15; On product gas output channel 3, be connected with product gas lateral 17; Product gas lateral 17 is connected with condenser E3, and condenser E3 is connected with rectifying column C middle and upper part through nitrogen oxide condensation pipe 16, is provided with saturated nitrogen vapor output channel 9 at rectifying column C top; Saturated nitrogen vapor output channel 9 is connected with nitrogen compressor pipeline 10; Nitrogen compressor pipeline 10 passes main heat exchanger E1 and is connected with nitrogen compressor device 11, is provided with impurity output channel 7 in rectifying column C bottom, and impurity output channel 7 passes main heat exchanger E1 and is connected with torch device of air 8; Described outside liquid nitrogen 12 is connected with emptying device 14 through the outside liquid nitrogen pipes 13 of passing main heat exchanger E1.
A kind of method of utilizing above-mentioned carbon mono oxide mixture purifying plant purifying carbon oxide gaseous mixture, its method is following:
1) feed gas containing carbon monoxide body 1 gets into main heat exchanger E1 and backflows the gas heat exchange through unstrpped gas conveyance conduit 2; Be cooled to the middle and lower part that gets into rectifying column C after the saturation point; The steam that comes together with evaporimeter E2 together rises, with the carbon monoxide withdrawing fluid that is got off by overhead condenser E3 condensation, and directly contact in rectifying column C; Carry out rectifying, obtaining containing CH4 at the rectifying column top is 100 * 10 -6With interior purer carbon monoxide product; And pass through product gas output channel 3 and extract out from rectifying column C top; Get into main heat exchanger E1 re-heat and pass out to product gathering-device 15 to normal temperature, the CH4 impurity that is concentrated in the rectifying column C gets into outside reduce internal heat after the main heat exchanger E1 re-heats 8 burnings of torch device of air or the discharge tower through impurity output channel 7;
2) press saturated nitrogen 4 through being connected with evaporimeter E2 through the saturated nitrogen pipeline 5 of middle pressure that passes main heat exchanger E1 in, the saturated nitrogen 4 of middle pressure is condensed into liquid nitrogen, and this liquid nitrogen is delivered to rectifying column C top through liquid nitrogen pipes 6; Low-temperature receiver as overhead condenser E3 is used for the carbon monoxide steam of condensation from rectifying column C top; C provides phegma for rectifying column, and product gas advances condenser E3 condensation through product gas lateral 17, and is connected with rectifying column C middle and upper part through nitrogen oxide condensation pipe 16; C provides phegma for rectifying column; In press saturated nitrogen 4 to be evaporated the back through saturated vapor, and through saturated nitrogen vapor output channel 9 in main heat exchanger E1 heat exchange, by the low-pressure nitrogen after the re-heat through being compressed in the nitrogen compressor pipeline 10 entering nitrogen compressor devices 11; After condensation, return main heat exchanger E1;
3) portion's liquid nitrogen 12 is connected with emptying device 14 through the outside liquid nitrogen pipes 13 of passing main heat exchanger E1, is used for replenishing cold damage.
The present invention has following good effect: the present invention is the principle that adopts cryogenic rectification; Utilize the boiling point of CO, CH4 different; Through rectifying in the tower CH4 is separated from CO, thereby reach the purpose that CO purifies, the content of CH4 among the CO is purified to 100 * 10 by 0.12～0.2% -6In; Cryogenic rectification method purification CO technology of the present invention, technological process is advanced, and is simple to operate, and running is steadily, and is safe and reliable, can realize Automatic Control.Adopt the high efficiency regular packed tower, the CO product purity is high; Energy is used adequately reasonably, and cold damage is little, and energy consumption index is low; Equipment is few, invests low.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Embodiment 1: as shown in Figure 1; A kind of carbon mono oxide mixture purifying plant; Comprise the saturated nitrogen of feed gas containing carbon monoxide body 1, middle pressure 4, outside liquid nitrogen 12, main heat exchanger E1, rectifying column C, be installed in evaporimeter E2 and condenser E3 in the rectifying column C; Described unstrpped gas 1 is connected with the middle part of rectifying column C through the unstrpped gas conveyance conduit 2 that passes main heat exchanger E1, and the saturated nitrogen 4 of middle pressure is through being connected with evaporimeter E2 through the saturated nitrogen pipeline 5 of middle pressure that passes main heat exchanger E1, and evaporimeter E2 is connected with rectifying column C top through liquid nitrogen pipes 6; Be provided with product gas output channel 3 in rectifying column C middle and upper part; Product gas output channel 3 passes main heat exchanger E1 and is connected with product gathering-device 15, on product gas output channel 3, is connected with product gas lateral 17, and product gas lateral 17 is connected with condenser E3; Condenser E3 is connected with rectifying column C middle and upper part through nitrogen oxide condensation pipe 16; Be provided with saturated nitrogen vapor output channel 9 at rectifying column C top, saturated nitrogen vapor output channel 9 is connected with nitrogen compressor pipeline 10, and nitrogen compressor pipeline 10 passes main heat exchanger E1 and is connected with nitrogen compressor device 11; Be provided with impurity output channel 7 in rectifying column C bottom, impurity output channel 7 passes main heat exchanger E1 and is connected with torch device of air 8; Described outside liquid nitrogen 12 is connected with emptying device 14 through the outside liquid nitrogen pipes 13 of passing main heat exchanger E1.
A kind of method of utilizing above-mentioned carbon mono oxide mixture purifying plant purifying carbon oxide gaseous mixture, its method is following:
1) feed gas containing carbon monoxide body 1 gets into main heat exchanger E1 and backflows the gas heat exchange through unstrpped gas conveyance conduit 2; Be cooled to the middle and lower part that gets into rectifying column C after the saturation point; The steam that comes together with evaporimeter E2 together rises, with the carbon monoxide withdrawing fluid that is got off by overhead condenser E3 condensation, and directly contact in rectifying column C; Carry out rectifying, obtaining containing CH4 at the rectifying column top is 100 * 10 -6With interior purer carbon monoxide product; And pass through product gas output channel 3 and extract out from rectifying column C top; Get into main heat exchanger E1 re-heat and pass out to product gathering-device 15, be concentrated in CH4 impurity in the rectifying column C and get into the torch device of air 8 that reduces internal heat after the main heat exchanger E1 re-heats through impurity output channel 7 and burn to normal temperature;
2) press saturated nitrogen 4 through being connected with evaporimeter E2 through the saturated nitrogen pipeline 5 of middle pressure that passes main heat exchanger E1 in, the saturated nitrogen 4 of middle pressure is condensed into liquid nitrogen, and this liquid nitrogen is delivered to rectifying column C top through liquid nitrogen pipes 6; Low-temperature receiver as overhead condenser E3 is used for the carbon monoxide steam of condensation from rectifying column C top; C provides phegma for rectifying column, and product gas advances condenser E3 condensation through product gas lateral 17, and is connected with rectifying column C middle and upper part through nitrogen oxide condensation pipe 16; C provides phegma for rectifying column; In press saturated nitrogen 4 to be evaporated the back through saturated vapor, and through saturated nitrogen vapor output channel 9 in main heat exchanger E1 heat exchange, by the low-pressure nitrogen after the re-heat through being compressed in the nitrogen compressor pipeline 10 entering nitrogen compressor devices 11; After condensation, return main heat exchanger E1;
3) portion's liquid nitrogen 12 is connected with emptying device 14 through the outside liquid nitrogen pipes 13 of passing main heat exchanger E1, is used for replenishing cold damage.
Embodiment 2: as shown in Figure 1; A kind of carbon mono oxide mixture purifying plant; Comprise the saturated nitrogen of feed gas containing carbon monoxide body 1, middle pressure 4, outside liquid nitrogen 12, main heat exchanger E1, rectifying column C, be installed in evaporimeter E2 and condenser E3 in the rectifying column C; Described unstrpped gas 1 is connected with the middle part of rectifying column C through the unstrpped gas conveyance conduit 2 that passes main heat exchanger E1, and the saturated nitrogen 4 of middle pressure is through being connected with evaporimeter E2 through the saturated nitrogen pipeline 5 of middle pressure that passes main heat exchanger E1, and evaporimeter E2 is connected with rectifying column C top through liquid nitrogen pipes 6; Be provided with product gas output channel 3 in rectifying column C middle and upper part; Product gas output channel 3 passes main heat exchanger E1 and is connected with product gathering-device 15, on product gas output channel 3, is connected with product gas lateral 17, and product gas lateral 17 is connected with condenser E3; Condenser E3 is connected with rectifying column C middle and upper part through nitrogen oxide condensation pipe 16; Be provided with saturated nitrogen vapor output channel 9 at rectifying column C top, saturated nitrogen vapor output channel 9 is connected with nitrogen compressor pipeline 10, and nitrogen compressor pipeline 10 passes main heat exchanger E1 and is connected with nitrogen compressor device 11; Be provided with impurity output channel 7 in rectifying column C bottom, impurity output channel 7 passes main heat exchanger E1 and is connected with torch device of air 8; Described outside liquid nitrogen 12 is connected with emptying device 14 through the outside liquid nitrogen pipes 13 of passing main heat exchanger E1.
A kind of method of utilizing above-mentioned carbon mono oxide mixture purifying plant purifying carbon oxide gaseous mixture, its method is following:
1) feed gas containing carbon monoxide body 1 gets into main heat exchanger E1 and backflows the gas heat exchange through unstrpped gas conveyance conduit 2; Be cooled to the middle and lower part that gets into rectifying column C after the saturation point; The steam that comes together with evaporimeter E2 together rises, with the carbon monoxide withdrawing fluid that is got off by overhead condenser E3 condensation, and directly contact in rectifying column C; Carry out rectifying, obtaining containing CH4 at the rectifying column top is 100 * 10 -6With interior purer carbon monoxide product; And pass through product gas output channel 3 and extract out from rectifying column C top; Get into main heat exchanger E1 re-heat and pass out to product gathering-device 15 to normal temperature, the CH4 impurity that is concentrated in the rectifying column C passes through to discharge outside the tower after impurity output channel 7 gets into main heat exchanger E1 re-heats;
2) press saturated nitrogen 4 through being connected with evaporimeter E2 through the saturated nitrogen pipeline 5 of middle pressure that passes main heat exchanger E1 in, the saturated nitrogen 4 of middle pressure is condensed into liquid nitrogen, and this liquid nitrogen is delivered to rectifying column C top through liquid nitrogen pipes 6; Low-temperature receiver as overhead condenser E3 is used for the carbon monoxide steam of condensation from rectifying column C top; C provides phegma for rectifying column, and product gas advances condenser E3 condensation through product gas lateral 17, and is connected with rectifying column C middle and upper part through nitrogen oxide condensation pipe 16; C provides phegma for rectifying column; In press saturated nitrogen 4 to be evaporated the back through saturated vapor, and through saturated nitrogen vapor output channel 9 in main heat exchanger E1 heat exchange, by the low-pressure nitrogen after the re-heat through being compressed in the nitrogen compressor pipeline 10 entering nitrogen compressor devices 11; After condensation, return main heat exchanger E1;
3) portion's liquid nitrogen 12 is connected with emptying device 14 through the outside liquid nitrogen pipes 13 of passing main heat exchanger E1, is used for replenishing cold damage.
Claims (2)
1. carbon mono oxide mixture purifying plant; Comprise feed gas containing carbon monoxide body (1), the saturated nitrogen of middle pressure (4), outside liquid nitrogen (12), main heat exchanger (E1), rectifying column (C), be installed in evaporimeter (E2) and condenser (E3) in the rectifying column (C); It is characterized in that: described unstrpped gas (1) is connected with the middle part of rectifying column (C) through the unstrpped gas conveyance conduit (2) that passes main heat exchanger (E1); The middle saturated nitrogen (4) of pressing is through being connected with evaporimeter (E2) through the saturated nitrogen pipeline of middle pressure (5) that passes main heat exchanger (E1); Evaporimeter (E2) is connected with rectifying column (C) top through liquid nitrogen pipes (6); Be provided with product gas output channel (3) in rectifying column (C) middle and upper part; Product gas output channel (3) passes main heat exchanger (E1) and is connected with product gathering-device (15); On product gas output channel (3), be connected with product gas lateral (17); Product gas lateral (17) is connected with condenser (E3), and condenser (E3) is connected with rectifying column (C) middle and upper part through nitrogen oxide condensation pipe (16), is provided with saturated nitrogen vapor output channel (9) at rectifying column (C) top; Saturated nitrogen vapor output channel (9) is connected with nitrogen compressor pipeline (10); Nitrogen compressor pipeline (10) passes main heat exchanger (E1) and is connected with nitrogen compressor device (11), is provided with impurity output channel (7) in rectifying column (C) bottom, and impurity output channel (7) passes main heat exchanger (E1) and is connected with torch device of air (8); Described outside liquid nitrogen (12) is connected with emptying device (14) through the outside liquid nitrogen pipes (13) of passing main heat exchanger (E1).
2. method of utilizing the described carbon mono oxide mixture purifying plant of claim 1 purifying carbon oxide gaseous mixture is characterized in that its method is following:
1) feed gas containing carbon monoxide body (1) gets into main heat exchanger (E1) and backflows the gas heat exchange through unstrpped gas conveyance conduit (2); Be cooled to the middle and lower part that gets into rectifying column (C) after the saturation point; The steam that comes together with evaporimeter (E2) together rises, with the carbon monoxide withdrawing fluid that is got off by overhead condenser (E3) condensation, and directly contact in rectifying column (C); Carry out rectifying, obtaining containing CH4 at the rectifying column top is 100 * 10
-6With interior purer carbon monoxide product; And pass through product gas output channel (3) and extract out from rectifying column (C) top; Get into main heat exchanger (E1) re-heat and pass out to product gathering-device (15) to normal temperature, be concentrated in the rectifying column (C) CH4 impurity through impurity output channel (7) get into reduce internal heat that torch device of air (8) burns after main heat exchanger (E1) re-heat or the discharge tower outside;
2) press saturated nitrogen (4) in through being connected with evaporimeter (E2) through the saturated nitrogen pipeline of middle pressure (5) that passes main heat exchanger (E1); The middle saturated nitrogen (4) of pressing is condensed into liquid nitrogen; This liquid nitrogen is delivered to rectifying column (C) top through liquid nitrogen pipes (6), is used for the carbon monoxide steam of condensation from rectifying column (C) top as the low-temperature receiver of overhead condenser (E3), and (C) provides phegma for rectifying column; Product gas advances condenser (E3) condensation through product gas lateral (17); And be connected with rectifying column (C) middle and upper part through nitrogen oxide condensation pipe (16), (C) provides phegma for rectifying column, passes through saturated vapor after the saturated nitrogen of middle pressure (4) is evaporated; And through saturated nitrogen vapor output channel (9) in main heat exchanger (E1) heat exchange; Through being compressed in nitrogen compressor pipeline (10) the entering nitrogen compressor device (11), after condensation, returned main heat exchanger (E1) by the low-pressure nitrogen after the re-heat;
3) portion's liquid nitrogen (12) is connected with emptying device (14) through the outside liquid nitrogen pipes (13) of passing main heat exchanger (E1), is used for replenishing cold damage.
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| CN2012102282982A CN102721264A (en) | 2012-07-04 | 2012-07-04 | Carbon monoxide mixture purification system and purification method |
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| CN103523751A (en) * | 2013-09-29 | 2014-01-22 | 开封空分集团有限公司 | Device and method for performing cryogenic separation and purification on carbon monoxide and hydrogen |
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