CN102351178B - Carbon dioxide purification device - Google Patents
Carbon dioxide purification device Download PDFInfo
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- CN102351178B CN102351178B CN2011101786037A CN201110178603A CN102351178B CN 102351178 B CN102351178 B CN 102351178B CN 2011101786037 A CN2011101786037 A CN 2011101786037A CN 201110178603 A CN201110178603 A CN 201110178603A CN 102351178 B CN102351178 B CN 102351178B
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Abstract
The invention relates to a carbon dioxide purification device for large-capacity carbon dioxide purification, comprising a rectifying tower providing with an air inlet and an air outlet, a condensation evaporator connected with the air outlet of the rectifying tower, a heat exchanger, wherein, the air inlet of the rectifying tower is connected with the raw material gas source through the heat exchanger, refrigeration agent is introduced into the condensation evaporator, the top of the condensation evaporator is provided with an exhaust gas outlet end, and the exhaust gas outlet end is communicated with the exhaust gas outlet through an exhaust gas passage; the exhaust gas passage is provided with a supercharged turbo expander, the exhaust gas passage passes through the supercharged turbo expander and then is introduced in the condensation evaporator to form an expansion refrigeration cycle, and the exhaust gas passage is connected with the exhaust gas outlet after coming out of the condensation evaporator. By using a multi-stage expansion refrigeration cycle and a multi-stage condensation evaporator, the energy consumption of the carbon dioxide purification is greatly reduced.
Description
Technical field
The present invention relates to a kind of carbonic acid gas purifying plant that is applicable to that the atm number carbonic acid gas is purified.
Background technology
Existing carbonic acid gas rectification and purification device adopts the one-level condensing works usually behind rectifying tower, because the condensation temperature difference of condensing works is bigger, the pressure of waste gas is for taking full advantage of, and energy consumption is bigger.
Summary of the invention
The purpose of this invention is to provide a kind of less energy-consumption, effective carbonic acid gas purifying plant.
For achieving the above object, the technical solution used in the present invention is:
A kind of carbonic acid gas purifying plant, the carbonic acid gas that is used for atm number is purified, it comprises the rectifying tower with inlet mouth and air outlet, condenser/evaporator, the heat exchanger that is connected with the air outlet of described rectifying tower, the inlet mouth of described rectifying tower is connected with the raw material source of the gas through described heat exchanger, feed refrigeration agent in the described condenser/evaporator, the top of described condenser/evaporator has the waste gas outlet side, and described waste gas outlet side is connected by exhaust passageway with waste gas outlet; Described exhaust passageway is provided with booster expansion turbine, described exhaust passageway forms the swell refrigeration circulation behind described booster expansion turbine with in the described condenser/evaporator of feeding, described exhaust passageway is connected with described waste gas outlet after going out described condenser/evaporator.
Preferably, the described swell refrigeration circulation of one-level or series connection are set on the described exhaust passageway multistage described swell refrigeration circulation is set.
Preferably, when series connection arranges multistage described swell refrigeration circulation time, after exhaust passageway passes through described booster expansion turbine and described condenser/evaporator successively in the described swell refrigeration circulations at different levels, exhaust passageway in the swell refrigeration circulations at different levels except last step is connected with the described swell refrigeration circulation of next stage, and the exhaust passageway in the described swell refrigeration circulation of last step is connected with described waste gas outlet.
Preferably, described exhaust passageway through the expanding end of described booster expansion turbine or earlier through the expanding end of described booster expansion turbine, again through the pressurized end of described booster expansion turbine or earlier through the pressurized end of described booster expansion turbine, pass through the expanding end of described booster expansion turbine again.
Preferably, the described booster expansion turbine of described exhaust passageway process is by supercooler.
Preferably, described exhaust passageway goes out behind the described condenser/evaporator through described heat exchanger.
Preferably, described booster expansion turbine is one or more.
Preferably, described booster expansion turbine adopts blower fan braking or the supercharging of blower fan end.
Principle of work of the present invention is: the CO 2 raw material gas that will contain other compositions feeds rectifying in the rectifying tower, and the Liquid carbon dioxide that obtains is by the bottom output of rectifying tower; The gas at rectifying tower top enters the condensation step by step of multi-stage condensing vaporizer, enter rectifying tower by the condensation of refrigerant backflow, and uncondensable waste gas is discharged at the top, and circulation provides cold for condenser/evaporator through swell refrigeration, discharges desired location finally by re-heat by waste gas outlet.
Because technique scheme is used, the present invention compared with prior art has following advantage: thus because the present invention adopts the swell refrigeration circulation to provide the required part cold of condenser/evaporator to cut down the consumption of energy significantly.
Description of drawings
Accompanying drawing 1 is the synoptic diagram of a kind of carbonic acid gas purifying plant of the present invention.
In the above accompanying drawing: 1, rectifying tower; 2, heat exchanger; 3, first condenser/evaporator; 4, second condenser/evaporator; 5, the 3rd condenser/evaporator; 6, booster expansion turbine; 7, water cooler.
Embodiment
Be further described below in conjunction with the present invention of embodiment shown in the drawings.
Embodiment one: shown in accompanying drawing 1.
A kind of carbonic acid gas purifying plant, the carbonic acid gas that is used for atm number is purified.It comprises the rectifying tower 1 with inlet mouth and air outlet, condenser/evaporator, the heat exchanger 2 that is connected with the air outlet of rectifying tower 1.The inlet mouth of rectifying tower 1 is connected with the raw material source of the gas through over-heat-exchanger 2.
Condenser/evaporator is three grades of condenser/evaporators, and it comprises first condenser/evaporator 3, second condenser/evaporator 4, the 3rd condenser/evaporator 5, and feeds refrigeration agent in each condenser/evaporator, as freonll-11 or ammonia.Adopt three grades of condenser/evaporators or multi-stage condensing vaporizer, for the condensation of carbonic acid gas provides the multi-stage condensing temperature, every grade of condensing temperature is reduced gradually, thereby can reduce the energy consumption that carbonic acid gas is purified.
The top of three grades of condenser/evaporators has the waste gas outlet side, and the waste gas outlet side is connected by exhaust passageway with waste gas outlet.Exhaust passageway is provided with booster expansion turbine, and exhaust passageway forms the swell refrigeration circulation behind booster expansion turbine with in three grades of condenser/evaporators of feeding, and exhaust passageway is connected with waste gas outlet after going out condenser/evaporator.
In the present embodiment, series connection arranges three grades of swell refrigeration circulations on the exhaust passageway, can select the progression that freezes according to the pressure of unstripped gas.
Every grade of swell refrigeration circulation is provided with booster expansion turbine 6, and booster expansion turbine 6 adopts blower fan braking or the supercharging of blower fan end.Booster expansion turbine 6 is one or more, and three booster expansion turbines 6 are set in the present embodiment, i.e. an independent booster expansion turbine 6 is adopted in each grade swell refrigeration circulation.
In the circulation of first step swell refrigeration, exhaust passageway is introduced into the pressurized end of booster expansion turbine 6, behind supercooler 7, enter the expanding end of booster expansion turbine 6 again, enter then in three grades of condenser/evaporators cold is provided, go out to enter behind three grades of condenser/evaporators second stage swell refrigeration circulation.In the swell refrigeration circulation of the second stage, exhaust passageway is introduced into the pressurized end of booster expansion turbine 6, behind supercooler 7, enter the expanding end of booster expansion turbine 6 again, enter then in three grades of condenser/evaporators cold is provided, go out to enter behind three grades of condenser/evaporators the circulation of third stage swell refrigeration.In the third quarter swell refrigeration circulation, exhaust passageway is introduced into the pressurized end of booster expansion turbine 6, behind supercooler 7, enter the expanding end of booster expansion turbine 6 again, enter then in three grades of condenser/evaporators cold is provided, go out three grades of exhaust passageways behind the condenser/evaporator and be connected with waste gas outlet through heat exchanger 2, go desired location after the waste gas heat exchange in the exhaust passageway.
Adopt this carbonic acid gas purifying plant can reduce the energy consumption of carbonic acid gas rectification and purification, and the carbon dioxide purity that is mixed with other compositions to be purified is used for providing the exhausted air quantity of cold more many when more low, then energy-saving effect is more remarkable.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (7)
1. carbonic acid gas purifying plant, the carbonic acid gas that is used for atm number is purified, it comprises the rectifying tower with inlet mouth and air outlet, condenser/evaporator, the heat exchanger that is connected with the air outlet of described rectifying tower, the inlet mouth of described rectifying tower is connected with the raw material source of the gas through described heat exchanger, feed refrigeration agent in the described condenser/evaporator, it is characterized in that: the top of described condenser/evaporator has the waste gas outlet side, and described waste gas outlet side is connected by exhaust passageway with waste gas outlet; Described exhaust passageway is provided with booster expansion turbine, described exhaust passageway forms the swell refrigeration circulation behind described booster expansion turbine with in the described condenser/evaporator of feeding, described exhaust passageway is connected with described waste gas outlet through described heat exchanger after going out described condenser/evaporator;
Described condenser/evaporator adopts the multi-stage condensing vaporizer, feeds refrigeration agent in the described multi-stage condensing vaporizer, and the condensing temperature in the described multi-stage condensing vaporizer reduces gradually.
2. a kind of carbonic acid gas purifying plant according to claim 1 is characterized in that: the described swell refrigeration circulation of one-level or series connection are set on the described exhaust passageway multistage described swell refrigeration circulation is set.
3. a kind of carbonic acid gas purifying plant according to claim 2, it is characterized in that: when series connection arranges multistage described swell refrigeration circulation time, after exhaust passageway passes through described booster expansion turbine and described condenser/evaporator successively in the described swell refrigeration circulations at different levels, exhaust passageway in the swell refrigeration circulations at different levels except last step is connected with the described swell refrigeration circulation of next stage, and the exhaust passageway in the described swell refrigeration circulation of last step is connected with described waste gas outlet.
4. a kind of carbonic acid gas purifying plant according to claim 1 is characterized in that: described exhaust passageway through the expanding end of described booster expansion turbine or earlier through the expanding end of described booster expansion turbine, again through the pressurized end of described booster expansion turbine or earlier through the pressurized end of described booster expansion turbine, pass through the expanding end of described booster expansion turbine again.
5. a kind of carbonic acid gas purifying plant according to claim 1 is characterized in that: described exhaust passageway through described booster expansion turbine by supercooler.
6. a kind of carbonic acid gas purifying plant according to claim 1 is characterized in that: described booster expansion turbine is one or more.
7. a kind of carbonic acid gas purifying plant according to claim 1 is characterized in that: described booster expansion turbine employing blower fan braking or the supercharging of blower fan end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101786037A CN102351178B (en) | 2011-06-29 | 2011-06-29 | Carbon dioxide purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101786037A CN102351178B (en) | 2011-06-29 | 2011-06-29 | Carbon dioxide purification device |
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| Publication Number | Publication Date |
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| CN102351178A CN102351178A (en) | 2012-02-15 |
| CN102351178B true CN102351178B (en) | 2013-08-28 |
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| CN2011101786037A Active CN102351178B (en) | 2011-06-29 | 2011-06-29 | Carbon dioxide purification device |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6035662A (en) * | 1998-10-13 | 2000-03-14 | Praxair Technology, Inc. | Method and apparatus for enhancing carbon dioxide recovery |
| CN202107537U (en) * | 2011-06-29 | 2012-01-11 | 苏州市兴鲁空分设备科技发展有限公司 | Carbon dioxide purification device |
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