CN104896873A - Improved integrated food-grade industrial-grade CO2 recovery device and process - Google Patents
Improved integrated food-grade industrial-grade CO2 recovery device and process Download PDFInfo
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- CN104896873A CN104896873A CN201510337785.6A CN201510337785A CN104896873A CN 104896873 A CN104896873 A CN 104896873A CN 201510337785 A CN201510337785 A CN 201510337785A CN 104896873 A CN104896873 A CN 104896873A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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Abstract
The invention discloses an improved integrated food-grade industrial-grade CO2 recovery device and process. The device comprises a carbon dioxide compressor, a cooling separator, a buffer tank, a desulfurization tower, a fine desulfurization system, a dryer, a liquefier, a rectifying tower, a reboiler and a subcooler which are connected in the material delivery direction successively. A connection pipe is arranged between the desulfurization tower and the dryer, and a valve is arranged on the pipe. The device and the process have the advantages that 1, saturated water included in raw material gas is compressed to be separated gradually effectively by multistage cooling separators, and accordingly, large pressure fluctuation of the compressor is relieved, shaking of the compressor caused by water carrying of the system is reduced, the safe and stable operation of equipment is protected; 2, water carried by the raw material gas is almost removed completely before desulfurization, water inlet damage failures of desulfurization agents in a purifier and fillers in the dryer can be prevented, the desulfurization rate of the fine desulfurization system is guaranteed, and good indexes and stability of food-grade carbon dioxide products can be maintained.
Description
Technical field
The present invention relates to technical field of environmental protection in chemical industry, particularly a kind ofly can reclaim food-grade, the device of technical grade carbon dioxide and technique simultaneously.
Background technology
Reducing CO2 emission, utilize carbon dioxide recovery, alleviate greenhouse effects, is that whole world the country and people cherishes the earth that the mankind depend on for existence and the target of making joint efforts.
Integration food-grade, technical grade carbon dioxide recovering apparatus and recovery process (country origin: China, publication number: 103359732A, publication date: 2013-10-23), disclose one and realize technical grade by switching annexation in same device, the retracting device of food-grade carbon-dioxide production and recovery process, the production line of technical grade carbon dioxide product increases simple fine de-sulfur system and produces food-grade carbon-dioxide product, and the food-grade carbon-dioxide total sulfur content produced is less than 0.1ppm, solving to produce in food-grade carbon-dioxide product process needs to increase complicated sulfur removal technology and the problem of energy consumption, technique is simple, energy consumption reduces, automaticity is high, waste discharge is few.
This retracting device is after the operation of certain hour, repeatedly occur that carbon-dioxide gas compressor shakes large situation, equipment is caused to there occurs the phenomenon occurring the parts rapid wears such as obvious crackle, air valve, hampered equipment safe, normally run, even there is the phenomenon of product sulfur content, ash content, Moisture high UCL, product does not reach food-grade index, this retracting device is used for integrated production food-grade, the object of technical grade carbon dioxide fails effectively to realize, and productive rate, the quality of food-grade carbon-dioxide reduce.
Summary of the invention
Goal of the invention: for the problems referred to above, the object of this invention is to provide a kind of integrated food-grade of improvement, technical grade CO
2retracting device and recovery process, improve the production stability of device, improve the validity of its desulfurization, ensures the steady quality of food-grade carbon-dioxide product.
Technical scheme: a kind of integrated food-grade of improvement, technical grade CO
2retracting device, comprise carbon-dioxide gas compressor, desulfurizing tower, fine de-sulfur system, drier, liquefier, rectifying column, reboiler, subcooler that mass transport direction connects successively, between desulfurizing tower and drier, connecting pipe is set, this pipeline arranges valve, between described carbon-dioxide gas compressor and described desulfurizing tower, is also connected with cooling separator, surge tank in turn.
Described cooling separator is at least set to one-level, and described surge tank is connected to after the described cooling separator of final stage.When described cooling separator is at least set to two-stage, the separative efficiency of every grade is successively decreased along mass transport direction.
Described fine de-sulfur system, comprises temperature raising device, hydrolysis tower and purifier that mass transport direction connects successively.
Above arbitrary described retracting device is utilized to carry out integrated food-grade, technical grade CO
2the technique reclaimed, the unstripped gas containing carbon dioxide after compressor supercharging, more progressively isolates moisture through cooling separator, and moisture is discharged by surge tank, then passes into the thick desulfurization of desulfurizing tower, removes the H in unstripped gas
2s;
Manufacture grade carbon-dioxide, then the material after thick desulfurization directly enters drier and carries out drying; Dried material enters liquefier, and with liquefied ammonia heat exchange, carbon dioxide condensing also enters rectifying column and carries out rectifying; Incoagulable gas in rectifying column Raw gas upwards evaporates, and is released by the pressure-control valve of tower top; Carbon dioxide liquid at the bottom of rectifying column enters reboiler; After the heating of reboiler gas ammonia, in liquid, incoagulable gas is again evaporated to rectifying column and releases, the carbon dioxide liquid in reboiler through subcooler cross cold after obtain technical grade carbon dioxide product; Gained technical grade carbon dioxide product purity reaches 99.99%;
Production food-grade carbon-dioxide, then the material after thick desulfurization was introduced into fine de-sulfur system fine de-sulfur before entering drier drying; Gained food-grade carbon-dioxide product total sulfur content is at below 0.1ppm.
Beneficial effect: compared with prior art, advantage of the present invention is: the saturation water 1, contained in unstripped gas after compression, by multistage cooling separator, moisture is progressively effectively separated, alleviate the pressure oscillation that compressor is larger, reduce the shock conditions that compressor causes because of rear system band water, proterctive equipment safety, even running; 2, unstripped gas is before carrying out desulfurization, namely almost entrained moisture is stripped of completely, can not cause into water broken invalid to filler in desulfurizing agent, drier in purifier, ensure that food-grade carbon-dioxide product can be kept the good and stable of index by the desulfurization degree of fine de-sulfur system.
Accompanying drawing explanation
Accompanying drawing is retracting device structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
A kind of integrated food-grade of improvement, technical grade CO
2retracting device, for the following problem that former retracting device occurs after operation, seeking solution.Retracting device has occurred that carbon-dioxide gas compressor shakes large situation repeatedly, and obvious crackle often appears in apparatus body, pipeline place, and the damage phenomenon that the frequency is higher has also appearred in the parts such as air valve; There is the phenomenon of sulfur content, ash content, Moisture high UCL in product, product does not reach food-grade index, and productive rate, the quality of food-grade carbon-dioxide reduce.
By analysis, the saturation water that the reason that above problem exists mainly contains in unstripped gas after compression, carbon-dioxide gas compressor can not effectively be separated, and causes compressor to shake large, rear system band water, cause desulfurizing agent water inlet broken invalid in purifier, product sulfur content exceeds standard, and does not reach food grade standard, causes filler water inlet broken invalid in drier, product ash content exceeds standard, and sometimes product moisture also exceeds standard.
As shown in drawings, for this reason, retracting device of the present invention comprises carbon-dioxide gas compressor, cooling separator, surge tank, desulfurizing tower, fine de-sulfur system, drier, liquefier, rectifying column, reboiler, the subcooler that mass transport direction connects successively, connecting pipe is set between desulfurizing tower and drier, this pipeline arranges valve.Fine de-sulfur system, comprises temperature raising device, hydrolysis tower and purifier that mass transport direction connects successively.
Cooling separator is used for draining, be at least one-level when arranging, multistage when arranging, surge tank is connected to after the cooling separator of final stage, and the separative efficiency of every grade of cooling separator is designed to successively decrease along mass transport direction, the steam contained almost can be separated completely in unstripped gas.
Before surge tank is arranged on material desulfurization, carry out draining, drainage effect is remarkable.
This retracting device carries out integrated food-grade, technical grade CO
2the technique reclaimed, the unstripped gas containing carbon dioxide after compressor supercharging, more progressively isolates moisture through cooling separator, and moisture is discharged by surge tank, then passes into the thick desulfurization of desulfurizing tower, removes the H in unstripped gas
2s;
Manufacture grade carbon-dioxide, then the material after thick desulfurization directly enters drier and carries out drying; Dried material enters liquefier, and with liquefied ammonia heat exchange, carbon dioxide condensing also enters rectifying column and carries out rectifying; Incoagulable gas in rectifying column Raw gas upwards evaporates, and is released by the pressure-control valve of tower top; Carbon dioxide liquid at the bottom of rectifying column enters reboiler; After the heating of reboiler gas ammonia, in liquid, incoagulable gas is again evaporated to rectifying column and releases, the carbon dioxide liquid in reboiler through subcooler cross cold after obtain technical grade carbon dioxide product; Gained technical grade carbon dioxide product purity reaches 99.99%;
Production food-grade carbon-dioxide, then the material after thick desulfurization was introduced into fine de-sulfur system fine de-sulfur before entering drier drying; Gained food-grade carbon-dioxide product total sulfur content is at below 0.1ppm.
Retracting device after adopting the present invention to improve and recovery process, make the recovery of integrated food-grade, technical grade carbon dioxide, operation conditions stability is significantly improved, Plant in good condition, product total sulfur content can reach food grade standard≤0.1ppm, and water disrepair phenomenon is not with by desulfurizing agent, and drying system filler does not occur disrepair phenomenon, rear system does not occur that evaporation residue exceeds standard (≤10ppm), Moisture high UCL (≤20ppm) phenomenon.
Claims (5)
1. integrated food-grade, the technical grade CO improved
2retracting device, comprise carbon-dioxide gas compressor, desulfurizing tower, fine de-sulfur system, drier, liquefier, rectifying column, reboiler, subcooler that mass transport direction connects successively, between desulfurizing tower and drier, connecting pipe is set, this pipeline arranges valve, it is characterized in that: between described carbon-dioxide gas compressor and described desulfurizing tower, be also connected with cooling separator, surge tank in turn.
2. integrated food-grade, the technical grade CO of improvement according to claim 1
2retracting device, is characterized in that: described cooling separator is at least set to one-level, and described surge tank is connected to after the described cooling separator of final stage.
3. integrated food-grade, the technical grade CO of improvement according to claim 2
2retracting device, is characterized in that: described cooling separator is at least set to two-stage, and the separative efficiency of every grade is successively decreased along mass transport direction.
4. integrated food-grade, the technical grade CO of improvement according to claim 1
2retracting device, is characterized in that: described fine de-sulfur system, comprises temperature raising device, hydrolysis tower and purifier that mass transport direction connects successively.
5. utilize the arbitrary described retracting device of claim 1-4 to carry out integrated food-grade, technical grade CO
2the technique reclaimed, is characterized in that: the unstripped gas containing carbon dioxide after compressor supercharging, more progressively isolates moisture through cooling separator, and moisture is discharged by surge tank, then passes into the thick desulfurization of desulfurizing tower, remove the H in unstripped gas
2s;
Manufacture grade carbon-dioxide, then the material after thick desulfurization directly enters drier and carries out drying; Dried material enters liquefier, and with liquefied ammonia heat exchange, carbon dioxide condensing also enters rectifying column and carries out rectifying; Incoagulable gas in rectifying column Raw gas upwards evaporates, and is released by the pressure-control valve of tower top; Carbon dioxide liquid at the bottom of rectifying column enters reboiler; After the heating of reboiler gas ammonia, in liquid, incoagulable gas is again evaporated to rectifying column and releases, the carbon dioxide liquid in reboiler through subcooler cross cold after obtain technical grade carbon dioxide product; Gained technical grade carbon dioxide product purity reaches 99.99%;
Production food-grade carbon-dioxide, then the material after thick desulfurization was introduced into fine de-sulfur system fine de-sulfur before entering drier drying; Gained food-grade carbon-dioxide product total sulfur content is at below 0.1ppm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439145A (en) * | 2016-01-12 | 2016-03-30 | 广西新天德能源有限公司 | Biological fermentation waste carbon dioxide recovery and purification device |
| CN109163504A (en) * | 2018-10-11 | 2019-01-08 | 欧中电子材料（重庆）有限公司 | The preparation process and device of electronics grade carbon-dioxide |
| CN110160316A (en) * | 2019-04-26 | 2019-08-23 | 大连伊立特科技有限公司 | Dry-ice machine CO 2 waste gas processing unit |
| CN110801639A (en) * | 2019-11-11 | 2020-02-18 | 杭州快凯高效节能新技术有限公司 | Method for recovering carbon dioxide by multistage liquefaction and fractional refrigeration of industrial tail gas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439145A (en) * | 2016-01-12 | 2016-03-30 | 广西新天德能源有限公司 | Biological fermentation waste carbon dioxide recovery and purification device |
| CN105439145B (en) * | 2016-01-12 | 2019-02-19 | 广西新天德能源有限公司 | Biofermentation discards carbon dioxide recovery purification devices |
| CN109163504A (en) * | 2018-10-11 | 2019-01-08 | 欧中电子材料（重庆）有限公司 | The preparation process and device of electronics grade carbon-dioxide |
| CN110160316A (en) * | 2019-04-26 | 2019-08-23 | 大连伊立特科技有限公司 | Dry-ice machine CO 2 waste gas processing unit |
| CN110160316B (en) * | 2019-04-26 | 2024-04-12 | 大连伊立特科技有限公司 | Carbon dioxide waste gas treatment device of dry ice machine |
| CN110801639A (en) * | 2019-11-11 | 2020-02-18 | 杭州快凯高效节能新技术有限公司 | Method for recovering carbon dioxide by multistage liquefaction and fractional refrigeration of industrial tail gas |
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