CN102442667B - Catching and refining device of carbon dioxide gas - Google Patents
Catching and refining device of carbon dioxide gas Download PDFInfo
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- CN102442667B CN102442667B CN2011102966925A CN201110296692A CN102442667B CN 102442667 B CN102442667 B CN 102442667B CN 2011102966925 A CN2011102966925 A CN 2011102966925A CN 201110296692 A CN201110296692 A CN 201110296692A CN 102442667 B CN102442667 B CN 102442667B
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Abstract
The invention discloses a catching and refining device of a carbon dioxide gas, which is composed of a blower, a compressor, an enrichment system, a desulphurization system, a de-hydrocarbon system, a purification system, a refrigeration system, a rectification system and a product system. The front end of the enrichment system is connected with the blower while the rear end thereof is connected with the desulphurization system; the rear end of the desulphurization system is connected with the de-hydrocarbon system; the rear end of the de-hydrocarbon system is connected with the purification system; the rear end of the purification system is connected with the refrigeration system; the rear end of the refrigeration system is connected with the rectification system; and the rear end of the rectification system is connected with the product system. Raw gas containing carbon dioxide is led to the enrichment system through the blower, then pressurized by the compressor and then enters into a desulphurizer and a de-hydrocarbon device for desulphurization and de-hydrocarbon; the purified carbon dioxide then enters in the refrigeration system; then the purified carbon dioxide after being liquefied enters into the rectification system and sent to a food-level carbon dioxide storage tank for storage. The liquid carbon dioxide products can be en-trucked or bottled for sale and also can be further made into solid dry ice through a dry ice machine.
Description
Technical field
Carbon dioxide of the present invention is caught and refining plant relates to chemical production equipment, the manufacturing equipment of specifically a kind of food-class liquid CO 2 and dry ice.
Background technology
Carbonic acid gas is a kind of very valuable carbon resource at present, can be widely used in multiple field.Industries such as chemosynthesis industry, mechanical protection welding, metal casting processing, agricultural fertilizer, fruit and vegetable using are fresh-keeping, beer beverage can, oil production, fire-fighting fire extinguishing, medical and health all need carbonic acid gas.And the gas source of China's carbonic acid gas is very abundant: the hydrogen manufacturing of Organic Chemical Plant, ethylene glycol production, the conversion gas of inorganic chemical industry factory, Ammonia Production, the grain fermentation brews alcoholic beverages, ore such as calcium, magnesium decomposes, boron ore powder carbon is separated, associated gas, stack gas of coal combustion or heavy oil or the like all contains a certain amount of carbonic acid gas.Carbon dioxide content difference in these unstripped gass, from 10%-90%, wherein ingredient is also different, contains plurality of impurities.New food-grade carbon-dioxide national standard 10621-2006 has strict demand to 22 indexs.Original manufacturing carbonic acid gas method is fairly simple, most of just rejects at a certain impurity composition wherein, and the product of producing is impure many, not pure especially, especially for the carbon dioxide product of food service industry, require relatively strictness, manufacture relatively difficulty.At existing problem in the above-mentioned prior art, a kind of novel carbon dioxide of research and design is caught and refining plant, and existing problem is very necessary in the prior art thereby overcome.
Summary of the invention
In view of existing problem in the above-mentioned prior art, the objective of the invention is a kind of novel carbon dioxide of research and design catches and refining plant, thereby it is fairly simple to solve original manufacturing carbonic acid gas method, most of just reject at a certain impurity composition wherein, the product of producing is impure many, is not pure especially, especially for the carbon dioxide product of food service industry, require relatively strictlyer, manufacture relatively problems such as difficulty.
Carbon dioxide of the present invention is caught and refining plant, is made up of gas blower, compressor, enrichment system, desulphurization system, de-hydrocarbon system, purification system, refrigeration system, distillation system and product systems.The front end of described enrichment system connects gas blower, the enrichment system rear end connects desulphurization system, the desulphurization system rear end connects de-hydrocarbon system, the de-hydrocarbon system rear end connects purification system, purification system rear end connection refrigeration system, refrigeration system rear end connection distillation system, and the distillation system rear end connects product systems.Described enrichment system comprises water wash column, tank, water pump, lean pump, rich solution pump, absorption tower, separator, regenerator column, skimmer, thermal source.The unstripped gas of being sent here by gas blower enters water wash column, be provided with tank below the water wash column, tank connects water pump, water pump is sent the water in the tank into water wash column, the outlet of water wash column upper end is connected to the bottom on absorption tower, the outlet of upper end, absorption tower is connected to separator, the outlet of separator is connected to the top on absorption tower, the outlet at bottom on absorption tower is connected to the top of regenerator column through the rich solution pump, the outlet of regenerator column top is connected to skimmer, the outlet at bottom of skimmer be connected with the regenerator column outlet at bottom and by lean pump be connected to top, absorption tower after the outlet at bottom of separator is connected, the top exit of skimmer is connected to the inlet of compressor.Thermal source is to be the regenerator column heating.Described desulphurization system comprises first water trap, first devulcanizer, second devulcanizer.The outlet of compressor is connected to first water trap, and the first water trap top exit is connected to first devulcanizer and second devulcanizer inlet, and first devulcanizer and second devulcanizer export the output that links together.Described de-hydrocarbon system comprises interchanger, well heater, takes off the hydrocarbon device.The gas of being come in by desulphurization system enters the top of interchanger, the bottom of interchanger is connected to the bottom of well heater, the top outlet of well heater is connected to takes off hydrocarbon device top inlet, takes off hydrocarbon device outlet at bottom and is connected to the interchanger upper entrance, the output of interchanger lower part outlet.Described purification system comprises water cooler, second water trap, first cleaner, second cleaner.The gas of being come in by de-hydrocarbon system enters second water trap behind water cooler, the second water trap top exit is connected to first cleaner and second cleaner top inlet, the output that links together of first cleaner and the second cleaner outlet at bottom.Described refrigeration system comprises condenser, refrigerator.By gas output after condenser condenses liquefaction that purification system is come in, refrigerator provides refrigeration to condenser.Described distillation system comprises rectifying tower.Described product systems comprise liquid product storage tank and the solid dry ice machine that is connected.
Used absorption liquid is for showing the absorption agent of alkalescence in absorption tower of the present invention and the regenerator column, and used absorption liquid is salt of wormwood or varies.
The mode of connection of first devulcanizer and second devulcanizer is that series-parallel connection is connected in the desulphurization system of the present invention, and first devulcanizer and second devulcanizer inlet is connected, export and be connected, and outlet and enter the mouth between also link together.When desulfurizer moves first, can drive first devulcanizer earlier, connect with second devulcanizer when treating first devulcanizer outlet sulphur content near index, second devulcanizer outlet sulphur content near index before, should reserve certain hour and stop first devulcanizer replacing sweetening agent, change back first devulcanizer as new second devulcanizer, second devulcanizer is as new first devulcanizer, recycle, both can guarantee the quality of desulfurization product gas, can guarantee the Sulfur capacity of sweetening agent again, sweetening agent is changed and can be carried out under the condition of not stopping, thus the operation of safeguards system steady and continuous.This mode had both guaranteed desulfurization precision, guaranteed continuous production again, can be flexible and changeable as the case may be.
Dry ice machine of the present invention is through the ingress of pipe connection to compressor.Reclaim being discharged into carbon dioxide in air, deliver to compressor and further handle, improved the rate of recovery of carbonic acid gas.
First cleaner of the present invention and the second cleaner material are that carbon steel adds stainless steel lining.
Take off the mode of connection of hydrocarbon device and interchanger, well heater in the de-hydrocarbon system of the present invention, taking off hydrocarbon reaction carries out at 300～350 ℃, electric heater starts when beginning, and this reaction is for thermopositive reaction, if hydro carbons is more in the unstripped gas, exothermic heat of reaction can ensure that catalysis takes off the hydrocarbon device and normally move, need not to start electric heater, de-hydrocarbon system does not have power consumption, and energy consumption is low, purify CH in the unstripped gas through the catalysis de-hydrocarbon system
4, ethane, propane, benzene etc. all is converted into CO
2And H
2O is reaching the purification target simultaneously, newly-generated CO
2And the reduction of rectification and purification emptying amount, not only significantly improve product purity, can also increase liquid CO
2Output, alleviate the processing load of follow-up workshop section simultaneously.
Carbon dioxide seizure of the present invention and refining plant working process are as follows: unstripped gas is introduced water wash column dedusting cooling by gas blower, further enter the absorption tower, wherein a part of carbonic acid gas is by solvent absorbing, tail gas such as nitrogen enter atmosphere by cat head, rich solution behind the absorbing carbon dioxide by tower at the bottom of through being pumped into regenerator column, from rich solution, separate the sucking-off carbonic acid gas by heating, not carbonated lean solution is gone out by the regenerator column underflow, with being pumped into the absorption tower, carbon dioxide is after overcooling, separate and remove liquid, this moment, the content of carbonic acid gas was about 90%, sent into compressor boost to 2.2～3.2Mpa.Carbon dioxide after the supercharging enters devulcanizer after dividing water, by the method desulfurization of adsorption catalysis oxidation, makes total sulfur in the unstripped gas less than 0.1ppm, and sulfurous gas is less than 1.0ppm.Gas converting heat after gas after the desulfurization enters interchanger and takes off hydrocarbon, take off the hydrocarbon device and take off hydrocarbon reaction through entering after the heater heats to 300 ℃ again, methane, ethane, ethene, hydrocarbons such as benzene and hydrogen all are converted into carbonic acid gas and water by oxidizing fire, carbonic acid gas after the purification and the unstripped gas heat exchange after the desulfurization, enter cleaner after dividing water by the water cooler cooling then, further remove impurity such as water, entering condenser again utilizes the cold of refrigerator generation to be cooled to-10 ℃～-20 ℃ liquefaction, enter in the rectifying tower after the liquefaction, cat head is isolated oxygen, non-condensable gasess such as nitrogen, carbon dioxide purity reaches more than 99.99% at the bottom of the tower, reach the state food grade standard, be depressured to 2.2Mpa through throttling, deliver in the food-grade carbon-dioxide basin and store, the liquid carbon dioxide product can be sold by entrucking or bottling, also can further produce solid-state dry ice by the dry ice machine, the gaseous carbon dioxide that produces when producing dry ice is connected to sneak in the unstripped gas before the compressor by pipeline and recycles.
The advantage of this device is at carbonic acid gas different material source, carries out the multiple systems path combination, produces liquid and solid-state food grade carbon-dioxide product, and is flexible and changeable, production efficiency is high, quality product is high.
This device fore portion capturing carbon dioxide adopts chemical process, and use shows the solution of alkalescence, absorbs earlier as materials such as salt of wormwood, thanomins and afterwards meets heat release, has improved the gas concentration lwevel in the unstripped gas, and is simple and practical.Two devulcanizer series/parallel operations are partly adopted in desulfurization, when desulfurizer moves first, can drive first devulcanizer earlier, connect with second devulcanizer when treating first devulcanizer outlet sulphur content near index, second devulcanizer outlet sulphur content near index before, should reserve certain hour and stop first devulcanizer, change sweetening agent, change back first devulcanizer as new second devulcanizer, second devulcanizer recycles as new first devulcanizer, both can guarantee the quality of desulfurization product gas, can guarantee the Sulfur capacity of sweetening agent again, sweetening agent is changed and can be carried out under the condition of not stopping, thus the operation of safeguards system steady and continuous; Taking off hydrocarbon reaction carries out at 300～350 ℃, electric heater starts when beginning, this reaction is thermopositive reaction, if hydro carbons is more in the unstripped gas, exothermic heat of reaction can ensure that catalysis takes off the hydrocarbon device and normally move, need not to start electric heater, de-hydrocarbon system does not have power consumption, and energy consumption is low, purify through the catalysis de-hydrocarbon system, methane in the unstripped gas, ethane, ethene, benzene, hydrogen etc. all are converted into carbonic acid gas and water, when reaching the purification target, the reduction of newly-generated carbonic acid gas and rectification and purification emptying amount, not only significantly improve product purity, can also increase the output of Liquid carbon dioxide, alleviate the processing load of follow-up workshop section simultaneously.When producing dry ice, before the gaseous carbon dioxide of generation turns back to compressor, improved the production efficiency of dry ice greatly.
The present invention is directed to carbonic acid gas different material source, and the high purity of liquid and solid carbon dioxide product, a whole set of carbon dioxide capture purification techniques is provided, the carbon dioxide recovery in the various different industrial gaseous wastees is utilized again.According to the difference of impurity composition in the unstripped gas and content, and the difference of product requirement, the integral part in the native system is adjusted, at the different system of different source of the gas combinations, produce qualified product.The present invention has multiple systems path combination, flexible and changeable, advanced technology, energy consumption is low, production efficiency is high, cover multiple gases source, characteristics such as quality product height.
Description of drawings
The present invention has a width of cloth accompanying drawing,
Fig. 1 is that carbon dioxide is caught and the refining plant structural representation.
Among the figure: 1, gas blower 2, water wash column 3, tank 4, water pump 5, lean pump 6, rich solution pump 7, absorption tower 8, separator 9, regenerator column 10, skimmer 11, thermal source 12, compressor 13, first water trap 14, first devulcanizer 15, second devulcanizer 16, interchanger 17, well heater 18, take off hydrocarbon device 19, water cooler 20, second water trap 21, first cleaner 22, second cleaner 23, condenser 24, refrigerator 25, rectifying tower 26, storage tank 27, solid dry ice machine.
Embodiment
Specific embodiments of the invention as shown in drawings, carbon dioxide is caught and refining plant is made up of gas blower 1, compressor 12, enrichment system, desulphurization system, de-hydrocarbon system, purification system, refrigeration system, distillation system and product systems.The front end of described enrichment system connects gas blower 1, the enrichment system rear end connects desulphurization system, the desulphurization system rear end connects de-hydrocarbon system, the de-hydrocarbon system rear end connects purification system, purification system rear end connection refrigeration system, refrigeration system rear end connection distillation system, and the distillation system rear end connects product systems.Described enrichment system comprises water wash column 2, tank 3, water pump 4, lean pump 5, rich solution pump 6, absorption tower 7, separator 8, regenerator column 9, skimmer 10, thermal source 11.The unstripped gas of being sent here by gas blower 1 enters water wash column 2, be provided with tank 3 below the water wash column 2, tank 3 connects water pump 4, water pump 4 is sent the water of 3 li of tanks into water wash column 2, the outlet of water wash column 2 upper ends is connected to the bottom on absorption tower 7, the outlet of 7 upper ends, absorption tower is connected to separator 8, the outlet of separator 8 is connected to the top on absorption tower 7, the outlet at bottom on absorption tower 7 is connected to the top of regenerator column 9 through rich solution pump 6, regenerator column 9 top exits are connected to skimmer 10, the outlet at bottom of skimmer 10 be connected with regenerator column 9 outlet at bottoms and by lean pump 5 be connected to 7 tops, absorption tower after the outlet at bottom of separator 8 is connected, the top exit of skimmer 10 is connected to the inlet of compressor 12.Thermal source 11 is to be regenerator column 9 heating.Described desulphurization system comprises first water trap 13, first devulcanizer 14, second devulcanizer 15; The outlet of compressor 12 is connected to first water trap, 13, the first water traps, 13 top exits and is connected to first devulcanizer 14 and second devulcanizer, 15 inlets, and first devulcanizer 14 and second devulcanizer 15 export the output that links together.Described de-hydrocarbon system comprises interchanger 16, well heater 17, takes off hydrocarbon device 18.The gas of being come in by desulphurization system enters the top of interchanger 16, the bottom of interchanger 16 is connected to the bottom of well heater 17, the top outlet of well heater 17 is connected to takes off hydrocarbon device 18 tops inlet, takes off hydrocarbon device 18 outlet at bottoms and is connected to interchanger 16 upper entrances, the output of interchanger 16 lower part outlets.Described purification system comprises water cooler 19, second water trap 20, first cleaner 21, second cleaner 22.The gas of being come in by de-hydrocarbon system enters second water trap 20 behind water cooler 19, second water trap, 20 top exits are connected to first cleaner 21 and second cleaner, 22 tops inlet, the output that links together of first cleaner 21 and second cleaner, 22 outlet at bottoms; Described refrigeration system comprises condenser 23, refrigerator 24.Exported behind condenser 23 condensation liquefactions by the gas that purification system is come in, refrigerator 24 provides refrigeration for condenser 23.Described distillation system comprises rectifying tower 25; Described product systems comprise liquid product storage tank 26 and the solid dry ice machine 27 that is connected.
9 li used absorption liquids of absorption tower 7 of the present invention and regenerator column are for showing the absorption agent of alkalescence, and used absorption liquid is salt of wormwood or varies.
The mode of connection of first devulcanizer 14 and second devulcanizer 15 is that series-parallel connection is connected in the desulphurization system of the present invention, and first devulcanizer 14 is connected with second devulcanizer 15 inlet, export and be connected, and outlet and enter the mouth between also link together.
Dry ice machine of the present invention (27) is through the ingress of pipe connection to compressor (12).
First cleaner of the present invention (21) is that carbon steel adds stainless steel lining with second cleaner (22) material.
Claims (5)
1. a carbon dioxide is caught and refining plant, is made up of gas blower (1), compressor (12), enrichment system, desulphurization system, de-hydrocarbon system, purification system, refrigeration system, distillation system and product systems; The front end that it is characterized in that described enrichment system connects gas blower (1), the enrichment system rear end connects desulphurization system, the desulphurization system rear end connects de-hydrocarbon system, the de-hydrocarbon system rear end connects purification system, purification system rear end connection refrigeration system, refrigeration system rear end connection distillation system, and the distillation system rear end connects product systems; Described enrichment system comprises water wash column (2), tank (3), water pump (4), lean pump (5), rich solution pump (6), absorption tower (7), separator (8), regenerator column (9), skimmer (10), thermal source (11); The unstripped gas of being sent here by gas blower (1) enters water wash column (2), be provided with tank (3) below the water wash column (2), tank (3) connects water pump (4), water pump (4) is sent the water of tank (3) lining into water wash column (2), the outlet of water wash column (2) upper end is connected to the bottom of absorption tower (7), the outlet of upper end, absorption tower (7) is connected to separator (8), the outlet of separator (8) is connected to the top of absorption tower (7), the outlet at bottom on absorption tower (7) is connected to the top of regenerator column (9) through rich solution pump (6), regenerator column (9) top exit is connected to skimmer (10), the outlet at bottom of skimmer (10) be connected with regenerator column (9) outlet at bottom and by lean pump (5) be connected to top, absorption tower (7) after the outlet at bottom of separator (8) is connected, the top exit of skimmer (10) is connected to the inlet of compressor (12); Thermal source (11) is to be regenerator column (9) heating; Described desulphurization system comprises first water trap (13), first devulcanizer (14), second devulcanizer (15); The outlet of compressor (12) is connected to first water trap (13), first water trap (13) top exit is connected to first devulcanizer (14) and second devulcanizer (15) inlet, and first devulcanizer (14) and second devulcanizer (15) export the output that links together; Described de-hydrocarbon system comprises interchanger (16), well heater (17), takes off hydrocarbon device (18); The gas of being come in by desulphurization system enters the top of interchanger (16), the bottom of interchanger (16) is connected to the bottom of well heater (17), the top outlet of well heater (17) is connected to takes off hydrocarbon device (18) top inlet, take off hydrocarbon device (18) outlet at bottom and be connected to interchanger (16) upper entrance, the output of interchanger (16) lower part outlet; Described purification system comprises water cooler (19), second water trap (20), first cleaner (21), second cleaner (22); The gas of being come in by de-hydrocarbon system enters second water trap (20) behind water cooler (19), second water trap (20) top exit is connected to first cleaner (21) and second cleaner (22) top inlet, the output that links together of first cleaner (21) and second cleaner (22) outlet at bottom; Described refrigeration system comprises condenser (23), refrigerator (24); Exported behind condenser (23) condensation liquefaction by the gas that purification system is come in, refrigerator (24) provides refrigeration for condenser (23); Described distillation system comprises rectifying tower (25); Described product systems comprise liquid product storage tank (26) and the solid dry ice machine (27) that is connected.
2. carbon dioxide according to claim 1 is caught and refining plant, it is characterized in that the used absorption liquid in described absorption tower (7) and regenerator column (9) lining for showing the absorption agent of alkalescence, and used absorption liquid is salt of wormwood or varies.
3. carbon dioxide according to claim 1 is caught and refining plant, it is characterized in that the mode of connection of first devulcanizer (14) and second devulcanizer (15) is that series-parallel connection is connected in the described desulphurization system, first devulcanizer (14) and second devulcanizer (15) inlet is connected, export and be connected, and outlet and enter the mouth between also link together.
4. carbon dioxide according to claim 1 is caught and refining plant, it is characterized in that described dry ice machine (27) is through the ingress of pipe connection to compressor (12).
5. carbon dioxide according to claim 1 is caught and refining plant, it is characterized in that described first cleaner (21) and second cleaner (22) material are that carbon steel adds stainless steel lining.
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| CN2011102966925A CN102442667B (en) | 2011-09-30 | 2011-09-30 | Catching and refining device of carbon dioxide gas |
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| CN2011102966925A CN102442667B (en) | 2011-09-30 | 2011-09-30 | Catching and refining device of carbon dioxide gas |
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| CN102442667B true CN102442667B (en) | 2013-07-31 |
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| CN105712348A (en) * | 2016-01-19 | 2016-06-29 | 辽宁石油化工大学 | Carbon dioxide recovery method and carbon dioxide recovery device for achieving zero emission of liquified natural gas |
| CN106281524A (en) * | 2016-08-31 | 2017-01-04 | 胜利油田孚瑞特石油装备有限责任公司 | A kind of recoverying and utilizing method of non-combustible oil field gas |
| CN106587061B (en) * | 2017-01-10 | 2017-12-22 | 宁夏坤辉气化有限公司 | Dropped a hint using decarburization the system of purifying carbon dioxide |
| CN107399718A (en) * | 2017-07-25 | 2017-11-28 | 大连中鼎化学有限公司 | A kind of ultra-pure oxygen, nitrogen purification method |
| CN108423681B (en) * | 2018-02-05 | 2021-05-18 | 杭州快凯高效节能新技术有限公司 | Absorption and rectification combined denitration and purification process for carbon capture gas |
| CN108939750A (en) * | 2018-06-25 | 2018-12-07 | 珠海恒基达鑫国际化工仓储股份有限公司 | A kind of condensate Deodor technique |
| CN111151117A (en) * | 2019-04-07 | 2020-05-15 | 魏善兆 | Process for producing and sealing carbon dioxide |
| CN116099333B (en) * | 2023-04-13 | 2023-06-23 | 清华四川能源互联网研究院 | Produced gas chemical method carbon capture system |
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| CN2606739Y (en) * | 2003-03-14 | 2004-03-17 | 大连理工大学 | CO2 purifying device by adsorptive fine disstillation |
| CN101607708A (en) * | 2009-07-27 | 2009-12-23 | 申屠晶 | The co-production of technical grade and food-class liquid CO 2 and device |
| US20110070135A1 (en) * | 2009-09-18 | 2011-03-24 | Hydrogen Energy International Limited | Processes and Apparatuses for Purifying Greenhouse Gases |
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