CN105626174A - Method for recovering heat of resurgent gases generated by organic amine method flue gas desulfurization - Google Patents
Method for recovering heat of resurgent gases generated by organic amine method flue gas desulfurization Download PDFInfo
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- CN105626174A CN105626174A CN201510654994.3A CN201510654994A CN105626174A CN 105626174 A CN105626174 A CN 105626174A CN 201510654994 A CN201510654994 A CN 201510654994A CN 105626174 A CN105626174 A CN 105626174A
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Abstract
The invention relates to a method for recovering heat of resurgent gases generated by organic amine method flue gas desulfurization. The resurgent gases which are produced in the regeneration process of an organic amine desulfurization agent and are rich in a large amount of water vapor are used for heating organic working fluids with low boiling points to generate saturated vapor of the organic working fluids. The saturated vapor drives a screw type expansion unit to do work for generating power, and the organic working fluids are recycled after exhaust and condensation.
Description
Technical field
The invention belongs to field of energy utilization, be specifically related to use screw type expansion machine to reclaim the heat of amine process flue gas desulfurization regeneration gas to reduce method and the retracting device of energy consumption.
Background technology
SO2One of predominant gas as atmospheric pollution, has caused the extensive concern of people. In order to effectively suppress to say the serious sulfur dioxide of benefit and the nitrogen oxides pollution to atmospheric environment, countries in the world particularly developed country has carried out long-term and unremitting effort for this, develops more than 200 kind of desulphurization denitration technology. SO2Control technology can be divided into burning before desulfurization, burning in desulfurization and burning after desulfurization (being also known as flue gas desulfurization). Wherein, flue gas desulfurization (FGD) is current most widely used general, technology that desulfuration efficiency is the highest, and Ye Shi various countries control SO2The technical way of discharge, within period considerably long from now on, FGD controls SO2The main method of discharge. This desulfurization technology has a variety of, is broadly divided into dry method, semidry method and wet method three class by the reactive state of sulfur removal technology. Wherein in China, limestone scrubbing FGD flue gas desulfurization technique accounts for more than 90%, but this technology there is also the problems such as generation carbon dioxide and desulfurizing agent while by-produced gypsum is difficult to recycling, scrubbing CO_2 cannot recycle.
The reproducible Wet Flue Gas Desulfurization Technique of solvent utilizes absorbent to absorb the SO in gas2, formed rich in SO2Richness absorb liquid, then richness is absorbed liquid and regenerates, absorbent after regeneration recycles, and regeneration discharges the SO of high concentration2Can producing high value-added product, plant investment and operating cost low, floor space is few, has good environment and economic benefit.
But, reproducible Wet Flue Gas Desulfurization Technique is in regenerative process, create a large amount of regeneration gas containing steam, owing to the taste of institute's heat content is relatively low, the heat of this strand of air-flow is generally underused, and is utilize air-cooled or circulating water mode to make these heat dissipation suffer to environment in most cases.
Summary of the invention
The present invention devises a kind of new regeneration gas heat recovery system, uses screw type expansion machine to reclaim the heat of amine process flue gas desulfurization regeneration gas to reduce method and the retracting device of energy consumption.
A kind of method that the technical scheme is that amine process flue gas desulfurization regeneration gas heat recovery, it is used for heating low boiling organic working medium by the regeneration gas rich in a large amount of water vapour produced in organic amine desulfurizer regenerative process, produce the saturated vapor of this organic working medium, this saturated vapor drives the acting generating of screw type expansion machine group, and aerofluxus condensation organic working medium recycles.
Further, the generating of screw type expansion machine group drives the electrical equipment of smoke processing system, and unnecessary electric power is outer defeated.
Further, adopting screw type expansion machine group is double-screw type decompressor or single-screw decompressor.
Further, low boiling organic working medium is one or more in liquefied ammonia, dimethyl ether, R123.
A kind of amine process flue gas desulfurization regeneration gas heat reclaim unit, including low boiling organic working medium heater, screw type expansion machine group, electromotor, cooler and circulating pump, regenerator regeneration gas pipeline connects low boiling organic working medium heater, low boiling organic working medium heater connects screw type expansion machine group by the road, screw type expansion machine group drives and connects electromotor, and screw type expansion machine group is sequentially communicated cooler, circulating pump and low boiling organic working medium heater by the road.
Further, described cooler is water recirculator.
Utilize the regeneration gas rich in a large amount of water vapour produced in organic amine desulfurizer regenerative process to heat low boiling organic working medium, produce the saturated vapor of this organic working medium, this saturated vapor drives the acting generating of screw type expansion machine group, and after aerofluxus condensation, organic working medium recycles; Screw type expansion machine group electricity is used for driving the electrical equipment of Sour gas disposal system, and unnecessary electric power is outer defeated. Adopt native system can be substantially reduced the total energy consumption of Sour gas disposal. Conventional cold-producing medium such as liquefied ammonia, dimethyl ether, R123 etc. can be employed as the low boiling organic working medium of the present invention.
Accompanying drawing explanation
Fig. 1 is retracting device structural representation of the present invention.
In figure: regenerator regeneration gas pipeline 1, low boiling organic working medium heater 2, screw type expansion machine group 3, electromotor 4, water recirculator 5, circulating pump 6.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
A kind of method of amine process flue gas desulfurization regeneration gas heat recovery, adopts the retracting device shown in Fig. 1, and retracting device includes low boiling organic working medium heater 10, screw type expansion machine group 20, electromotor 30, water recirculator 40 and circulating pump 50. Regenerator regeneration gas pipeline 1 connects low boiling organic working medium heater 10, the organic working medium of low boiling organic working medium heater 20 is 2 connection screw type expansion machine group 20 by the road, screw type expansion machine group 20 drives and connects electromotor 30,3 is sequentially communicated water recirculator 40, circulating pump 50 and low boiling organic working medium heater 10 by the road from screw type expansion machine group 30 organic working medium out.
On this embodiment basis, the generating of screw type expansion machine group drives the electrical equipment of smoke processing system.
On this embodiment basis, adopting screw type expansion machine group can be double-screw type decompressor or single-screw decompressor.
On this embodiment basis, low boiling organic working medium can be one or more in liquefied ammonia, dimethyl ether, R123.
Amine process is reclaimed flue gas during smelting from regeneration overhead regeneration gas temperature 98.5 DEG C out, pressure 0.125MPa, flow 3600Nm3/ h, entering dimethyl ether heater 10 by regenerator regeneration gas pipeline 1 makes dimethyl ether heating to seething with excitement, being sent to lower operation after the regeneration gas further refrigerated separation drop after dimethyl ether heater 20 cooling out, heated dimethyl ether expands unit 20 drive electrical generators 30 by pipeline 2 lead-screw formula and generates electricity. From screw type expansion machine group dimethyl ether out through pipeline 3 enter water recirculator 40 by circulating water after, sent into dimethyl ether heater 10 by circulating pump 50 by pipeline 5 through pipeline 4 and recycle. Adopt this method can generate electricity 50Kw, save recirculated cooling water 10t/h.
Claims (5)
1. the method for an amine process flue gas desulfurization regeneration gas heat recovery, it is characterized in that: adopt retracting device, retracting device includes low boiling organic working medium heater, screw type expansion machine group, electromotor, cooler and circulating pump, regenerator regeneration gas pipeline connects low boiling organic working medium heater, low boiling organic working medium heater connects screw type expansion machine group by the road, screw type expansion machine group drives and connects electromotor, and screw type expansion machine group is sequentially communicated cooler, circulating pump and low boiling organic working medium heater by the road; It is used for heating low boiling organic working medium by the regeneration gas rich in a large amount of water vapour produced in organic amine desulfurizer regenerative process, produce the saturated vapor of this organic working medium, this saturated vapor drives the acting generating of screw type expansion machine group, and aerofluxus condensation organic working medium recycles.
2. the method for a kind of amine process flue gas desulfurization regeneration gas heat recovery according to claim 1, is characterized in that: the generating of screw type expansion machine group drives the electrical equipment of smoke processing system, and unnecessary electric power is outer defeated.
3. the method for a kind of amine process flue gas desulfurization regeneration gas heat recovery according to claim 1, is characterized in that: adopting screw type expansion machine group is double-screw type decompressor or single-screw decompressor.
4. the method for a kind of amine process flue gas desulfurization regeneration gas heat recovery according to claim 1, is characterized in that: low boiling organic working medium is one or more in liquefied ammonia, dimethyl ether, R123.
5. the method for a kind of amine process flue gas desulfurization regeneration gas heat recovery according to claim 1, is characterized in that: described cooler is water recirculator.
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| CN201510654994.3A CN105626174A (en) | 2015-10-12 | 2015-10-12 | Method for recovering heat of resurgent gases generated by organic amine method flue gas desulfurization |
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| CN201510654994.3A CN105626174A (en) | 2015-10-12 | 2015-10-12 | Method for recovering heat of resurgent gases generated by organic amine method flue gas desulfurization |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201367922Y (en) * | 2009-01-08 | 2009-12-23 | 莫少民 | Power generating device utilizing enthalpy difference convection of replacement working media of sea water and waste heat |
| CN201972747U (en) * | 2010-11-01 | 2011-09-14 | 牛东 | System for recycling heat of refrigerating machine |
| CN103410578A (en) * | 2013-08-01 | 2013-11-27 | 南京微阳电力科技有限公司 | Low-temperature organic Rankine cycle industrial waste heat power generating equipment |
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- 2015-10-12 CN CN201510654994.3A patent/CN105626174A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201367922Y (en) * | 2009-01-08 | 2009-12-23 | 莫少民 | Power generating device utilizing enthalpy difference convection of replacement working media of sea water and waste heat |
| CN201972747U (en) * | 2010-11-01 | 2011-09-14 | 牛东 | System for recycling heat of refrigerating machine |
| CN103410578A (en) * | 2013-08-01 | 2013-11-27 | 南京微阳电力科技有限公司 | Low-temperature organic Rankine cycle industrial waste heat power generating equipment |
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Application publication date: 20160601 |