CN103245130A - Method for recycling heat and water in dried tail gas by heat pump working media and device of method - Google Patents
Method for recycling heat and water in dried tail gas by heat pump working media and device of method Download PDFInfo
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- CN103245130A CN103245130A CN2012100328746A CN201210032874A CN103245130A CN 103245130 A CN103245130 A CN 103245130A CN 2012100328746 A CN2012100328746 A CN 2012100328746A CN 201210032874 A CN201210032874 A CN 201210032874A CN 103245130 A CN103245130 A CN 103245130A
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Abstract
The invention relates to a method for recycling heat and water in dried tail gas by heat pump working media. By adoption of combination of four processes of heat absorption, flash evaporation, compression and condensation, the heat in the dried tail gas is recovered by the heat pump working media in closed recirculation, and condensate water is recovered. By the aid of a condensing heat exchanger, low-grade heat carried in the dried tail gas can be transmitted to liquid heat pump working media; by a flash drum, the liquid heat pump working media absorbing the low-grade heat are subjected to flash evaporation to gaseous heat pump working media; by the aid of a heat pump compressor, the low-temperature low-pressure gaseous heat pump working media are changed into high-temperature high-pressure gaseous heat pump working media; and by the aid of a vapor generator, the low-grade heat carried in the gaseous heat pump working media is transmitted to process water, and accordingly the process water is vaporized to vapor. The method has the advantages that a heat pump technology is applied, the dried tail gas serves as secondary energy to be developed and utilized, and the method is used for preparing heat and recovering water, and is energy-saving and consumption-reducing.
Description
Technical field
The present invention proposes the recoverying and utilizing method of heat and water in a kind of dried tail gas, that is: adopt the heat pump fluid of sealing and circulating to reclaim heat and condensed water in the dried tail gas.The technical field that the present invention relates to save energy and reduce the cost.
Prior art
In the existing dry technology, temperature is the emptying mode after the dried tail gas between 80～200 ℃ adopts dedusting more, and the low grade heat energy that carries in the tail gas and water are not recycled; The dried tail gas of temperature 〉=200 ℃ adopts emptying mode after the wet scrubbing more, does not only reclaim heat energy, and the cold media (as technology cooling water, salt solution etc.) of cool drying tail gas need be provided, and consumes additional energy.
Summary of the invention
For overcoming the prior art deficiency, the objective of the invention is to propose the method that dried tail gas heat and water are reclaimed in a kind of heat pump fluid circulation.
Another object of the present invention is to provide the device of realizing said method.
Purpose of the present invention is achieved through the following technical solutions:
The method of dried tail gas heat and water is reclaimed in a kind of heat pump fluid circulation, the steps include:
A. working medium endothermic process
90～600 ℃ dried tail gas and liquid heat pump fluid reverse indirect heat exchange in condensing heat exchanger, low grade heat energy in the liquid heat pump fluid absorption dehydration tail gas, water vapor condensation in the dried tail gas is～60 ℃ condensed water, accumulate in the condensing heat exchanger bottom, filtering the back through filter becomes recycle-water by the condensate pump discharge; On-condensible gas is discharged by air-introduced machine by the condensing heat exchanger top.
B. working medium flash distillation air lift process
Liquid heat pump fluid behind the absorption low grade heat energy enters in the flash tank, carries out the vacuum flashing air lift under 0.01～0.05MPa (A).Liquid heat pump fluid temperature after the air lift is 40～110 ℃, by squeezing into the low grade heat energy that absorption dehydration tail gas carries in the condensing heat exchanger after the working medium circulating pump supercharging; 40～110 ℃ of gaseous state heat pump fluids that flash distillation is come out enter in the heat pump compressor.
C. working medium is compressed temperature-rise period
The gaseous state heat pump fluid of low-temp low-pressure enters in the steam generator 8 become the gaseous state heat pump fluid of 100～170 ℃ of HTHPs in heat pump compressor after.
D. working medium condensation exothermic process
100～170 ℃ of gaseous state heat pump fluids of discharging from heat pump compressor and normal temperature fresh water (FW) reverse indirect heat exchange in steam generator, make fresh water (FW) absorb behind the high-grade heat energy that the gaseous state heat pump fluid carries gasification for steam for external world's use.Simultaneously, be condensed into liquid state after the heat release of gaseous state heat pump fluid and enter working medium lime set jar, enter flash tank through choke valve and recycle.
Be used for realizing the device of the inventive method, comprise:
A condensing heat exchanger, its effect are that the low grade heat energy that dried tail gas carries is passed to liquid heat pump fluid.
A filter, its effect are the impurity particles in the filtration drying tail gas condensed water, avoid it to stop up condensate pump.
A condensate pump, its effect are to discharge after the dried tail gas condensed water supercharging after filtering.
An air-introduced machine, its effect are to discharge in the on-condensible gas autocondensation heat exchanger in the dried tail gas.
A flash tank, its effect are that to make the liquid heat pump fluid flash distillation air lift that absorbs behind the low grade heat energy be the gaseous state heat pump fluid.
A working medium circulating pump, its effect are to squeeze in the condensing heat exchanger after the liquid heat pump fluid supercharging in the flash tank.
A heat pump compressor, its effect provides the driving energy, makes the gaseous state heat pump fluid of low-temp low-pressure become HTHP.
A steam generator, its effect are to give fresh water (FW) with the high-grade thermal energy transfer that the gaseous state heat pump fluid carries, and make its gasification be steam.
A working medium lime set jar, its effect are the liquid heat pump fluids after the storage heat release.
A choke valve, its effect are liquid heat pump fluid to be entered in the flash tank recycle.
Advantage of the present invention
In the airtight heat pump fluid circulatory system, by working medium heat absorption, working medium flash distillation air lift, working medium compression heat up, four kinds of process combination of working medium condensation heat release, make that low grade heat energy is converted into the high-grade heat energy that steam can take place in the dried tail gas.Wherein: the key equipment of working medium endothermic process is condensing heat exchanger; The key equipment of working medium flash distillation air lift process is flash tank; The key equipment of working medium compression temperature-rise period is heat pump compressor; The key equipment of working medium condensation exothermic process is steam generator, and therefore, advantage of the present invention mainly shows following several aspect:
(1) simple: capital equipment of the present invention is condensing heat exchanger, flash tank, heat pump compressor and steam generator, is the new technology of conventional equipment combination.System is simple, and is workable.
(2) used heat utilization: the present invention becomes the high temperature heat that steam can take place with the low-temperature waste heat in the dried tail gas, and a large amount of low grade heat energies is recycled, and reduces unnecessary waste.
(3) safety and environmental protection: the present invention utilizes heat pump techniques to make the dried tail gas cool-down dehumidification, reduces carrying capacity of environment, and the steam that produces is clean energy resource.
(4) of many uses: the steam that the present invention produces can be widely used in the related industries field.
Description of drawings
Fig. 1: process chart of the present invention.
Fig. 2: process flow diagram of the present invention.
The specific embodiment
Shown in accompanying drawing 1,2, the method for dried tail gas heat and water is reclaimed in a kind of heat pump fluid circulation, and its technological process is:
A. working medium endothermic process
90～600 ℃ dried tail gas and liquid heat pump fluid reverse indirect heat exchange in condensing heat exchanger 1.Low grade heat energy in the liquid heat pump fluid absorption dehydration tail gas.The thermal source of low grade heat energy is dried tail gas.Water vapor condensation in the dried tail gas is～60 ℃ condensed water, accumulates in condensing heat exchanger 1 bottom, filters the back through filter 2 and discharges by condensate pump 3; On-condensible gas is discharged by air-introduced machine 4 by condensing heat exchanger 1 top.
B. working medium flash distillation air lift process
Liquid heat pump fluid behind the absorption low grade heat energy enters in the flash tank 5, carries out the vacuum flashing air lift under 0.01～0.05MPa (A).Liquid heat pump fluid temperature after the air lift is 40～110 ℃, by squeezing into the low grade heat energy that absorption dehydration tail gas carries in the condensing heat exchanger 1 after working medium circulating pump 6 superchargings; 40～110 ℃ of gaseous state heat pump fluids that flash distillation is come out enter in the heat pump compressor 7.
C. working medium is compressed temperature-rise period
The gaseous state heat pump fluid of low-temp low-pressure enters in the steam generator 8 become HTHP gaseous state heat pump fluid (100～170 ℃) in heat pump compressor 7 after.
D. working medium condensation exothermic process
100～170 ℃ of gaseous state heat pump fluids of discharging from heat pump compressor 7 and normal temperature fresh water (FW) reverse indirect heat exchange steam generator 8 in, make fresh water (FW) absorb behind the high-grade heat energy that the gaseous state heat pump fluid carries gasification for steam for external world's use.Simultaneously, be condensed into liquid state after the heat release of gaseous state heat pump fluid and enter working medium lime set jar 9, in choke valve 10 enters flash tank 5, recycle.
Claims (7)
1. a heat pump fluid circulates and reclaims the method for dried tail gas heat and water, the steps include:
A. working medium endothermic process
90～600 ℃ dried tail gas and liquid heat pump fluid be reverse indirect heat exchange in condensing heat exchanger (1), low grade heat energy in the liquid heat pump fluid absorption dehydration tail gas, water vapor condensation in the dried tail gas is～60 ℃ condensed water, accumulate in condensing heat exchanger (1) bottom, filter the back through filter (2) and discharge by condensate pump (3); On-condensible gas is discharged by air-introduced machine (4) by condensing heat exchanger (1) top;
B. working medium flash distillation air lift process
Liquid heat pump fluid behind the absorption low grade heat energy enters in the flash tank (5), carries out the vacuum flashing air lift under 0.01～0.05MPa (A); Liquid heat pump fluid temperature after the air lift is 40～110 ℃, by squeezing into the low grade heat energy that the interior absorption dehydration tail gas of condensing heat exchanger (1) carries after working medium circulating pump (6) supercharging; 40～110 ℃ of gaseous state heat pump fluids that flash distillation is come out enter in the heat pump compressor (7);
C. working medium is compressed temperature-rise period
The gaseous state heat pump fluid of low-temp low-pressure becomes 100～170 ℃ of HTHP gaseous state heat pump fluids in heat pump compressor (7) after, enter in the steam generator (8);
D. working medium condensation exothermic process
100～170 ℃ of gaseous state heat pump fluids of discharging from heat pump compressor 7 and normal temperature fresh water (FW) reverse indirect heat exchange steam generator (8) in, make fresh water (FW) absorb behind the high-grade heat energy that the gaseous state heat pump fluid carries gasification for steam for external world's use.Simultaneously, be condensed into liquid state after the heat release of gaseous state heat pump fluid and enter working medium lime set jar (9), in choke valve (10) enters flash tank (5), recycle.
2. the method for dried tail gas heat and water is reclaimed in a kind of heat pump fluid circulation as claimed in claim 1, it is characterized in that low-grade heat source is dried tail gas, or oxidized tail gas or refinery exhaust or power plant's industrial tail gas.
3. the method for dried tail gas heat and water is reclaimed in a kind of heat pump fluid circulation as claimed in claim 1, it is characterized in that heat pump fluid is R123 or other high condensation temperature working medium.
4. be used for realizing the method for the described a kind of heat pump fluid circulation recovery dried tail gas heat of claim 1 and water, its equipment comprises:
A condensing heat exchanger (1), its effect are that the low grade heat energy that dried tail gas carries is passed to liquid heat pump fluid;
A filter (2), its effect are the impurity particles in the filtration drying tail gas condensed water, avoid it to stop up condensate pump (3);
A condensate pump (3), its effect are to discharge after the dried tail gas condensed water supercharging after filtering;
An air-introduced machine (4), its effect are with discharging in the on-condensible gas autocondensation heat exchanger (1) in the dried tail gas;
A flash tank (5), its effect are that to make the liquid heat pump fluid flash distillation air lift that absorbs behind the low grade heat energy be the gaseous state heat pump fluid;
A working medium circulating pump (6), its effect are to squeeze in the condensing heat exchanger (1) after the liquid heat pump fluid supercharging in the flash tank (5);
A heat pump compressor (7), its effect provides the driving energy, makes the gaseous state heat pump fluid of low-temp low-pressure become HTHP;
A steam generator (8), its effect are to give fresh water (FW) with the high-grade thermal energy transfer that the gaseous state heat pump fluid carries, and make its gasification be steam;
A working medium lime set jar (9), its effect are the liquid heat pump fluids after the storage heat release;
A choke valve (10), its effect are to make liquid heat pump fluid enter flash tank (5) to recycle.
5. the equipment of realization claim 1 as claimed in claim 4 is characterized in that condensing heat exchanger (1) is the heat exchanger of band finned coil; The type of cooling is cooled off for forcing, or is cooling naturally.
6. the equipment of realization claim 1 as claimed in claim 4 is characterized in that heat pump compressor (7) is hermetic compressor; Compress mode is displacement type, or is velocity profile; Regulative mode is single-stage, or is multistage.
7. the equipment of realization claim 1 as claimed in claim 4 is characterized in that steam generator (8) is the tubular heat exchanger of band evaporating space, or is plate type heat exchanger; The heat exchanger pattern is horizontal, or is vertical; Heat exchange mode is adverse current, or is and stream.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210032874.6A CN103245130B (en) | 2012-02-14 | 2012-02-14 | A kind of method of heat pump fluid circulation and stress dried tail gas heat and water and device thereof |
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| CN201210032874.6A CN103245130B (en) | 2012-02-14 | 2012-02-14 | A kind of method of heat pump fluid circulation and stress dried tail gas heat and water and device thereof |
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Cited By (8)
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| CN103968410A (en) * | 2014-05-30 | 2014-08-06 | 上海汇闵能源科技有限公司 | System for recovering waste heat of low temperature smoke and flashing steam |
| CN104501568A (en) * | 2015-01-13 | 2015-04-08 | 天华化工机械及自动化研究设计院有限公司 | System for improving water recovery efficiency of drying tail gas and application method thereof |
| CN105004170A (en) * | 2015-08-14 | 2015-10-28 | 吉首大学 | Soft partition board type through counter-flow drier |
| CN105737127A (en) * | 2016-03-28 | 2016-07-06 | 侴乔力 | Water vapor preparer |
| CN105985231A (en) * | 2014-10-06 | 2016-10-05 | 因温斯特技术公司 | Preparation of aromatic dicarboxylic acid |
| CN108020104A (en) * | 2016-10-31 | 2018-05-11 | 中国石油化工股份有限公司 | Catalytic cracking catalyst is spray-dried the heat reclaiming system and its method of tail gas |
| CN108587894A (en) * | 2018-08-01 | 2018-09-28 | 石家庄志杰科技股份有限公司 | Biofermentation steam tail gas heat energy recycling system and method |
| CN113646058A (en) * | 2019-02-01 | 2021-11-12 | 能量集成公司 | Method and system for energy efficient drying of co-products in biorefinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103968410A (en) * | 2014-05-30 | 2014-08-06 | 上海汇闵能源科技有限公司 | System for recovering waste heat of low temperature smoke and flashing steam |
| CN103968410B (en) * | 2014-05-30 | 2017-01-04 | 上海汇闵能源科技有限公司 | A kind of low-temperature flue gas and the residual neat recovering system of flash-off steam |
| CN105985231A (en) * | 2014-10-06 | 2016-10-05 | 因温斯特技术公司 | Preparation of aromatic dicarboxylic acid |
| CN113527084A (en) * | 2014-10-06 | 2021-10-22 | 英威达纺织（英国）有限公司 | Preparation of aromatic dicarboxylic acids |
| CN104501568A (en) * | 2015-01-13 | 2015-04-08 | 天华化工机械及自动化研究设计院有限公司 | System for improving water recovery efficiency of drying tail gas and application method thereof |
| CN104501568B (en) * | 2015-01-13 | 2017-01-04 | 天华化工机械及自动化研究设计院有限公司 | A kind of system improving dry tail gas Water Sproading efficiency and application process thereof |
| CN105004170A (en) * | 2015-08-14 | 2015-10-28 | 吉首大学 | Soft partition board type through counter-flow drier |
| CN105737127A (en) * | 2016-03-28 | 2016-07-06 | 侴乔力 | Water vapor preparer |
| CN108020104A (en) * | 2016-10-31 | 2018-05-11 | 中国石油化工股份有限公司 | Catalytic cracking catalyst is spray-dried the heat reclaiming system and its method of tail gas |
| CN108587894A (en) * | 2018-08-01 | 2018-09-28 | 石家庄志杰科技股份有限公司 | Biofermentation steam tail gas heat energy recycling system and method |
| CN113646058A (en) * | 2019-02-01 | 2021-11-12 | 能量集成公司 | Method and system for energy efficient drying of co-products in biorefinery |
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| CN103245130B (en) | 2015-10-07 |
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