CN104456520A - Circulatory flue gas waste heat recovery system with mechanical compression heat pump - Google Patents
Circulatory flue gas waste heat recovery system with mechanical compression heat pump Download PDFInfo
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- CN104456520A CN104456520A CN201410720619.XA CN201410720619A CN104456520A CN 104456520 A CN104456520 A CN 104456520A CN 201410720619 A CN201410720619 A CN 201410720619A CN 104456520 A CN104456520 A CN 104456520A
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- boiler
- flue gas
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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Abstract
The invention discloses a circulatory flue gas waste heat recovery system with a mechanical compression heat pump. The system comprises a gas boiler, an air preheater, a mechanical compression heat pump device and a small turbine, wherein the mechanical compression heat pump device comprises an evaporator, a compressor, a condenser and a throttling mechanism which are connected sequentially to form a loop, the evaporator is provided with a discharge pipe, the condenser is provided with a boiler low-temperature water feeding channel and a boiler high-temperature water feeding channel, and the boiler high-temperature water feeding channel is connected with the gas boiler; the gas boiler is provided with a high-temperature flue gas channel and a steam branch channel; the high-temperature flue gas channel is connected with the air preheater, and the air preheater is provided with a low-temperature flue gas channel connected with the evaporator; the steam branch channel is connected with the small turbine, the small turbine is provided with a condensed water channel and is connected with the compressor, and the condensed water channel is connected with the boiler high-temperature water feeding channel. Compared with the prior art, the circulatory flue gas waste heat recovery system has the advantages that the temperature of fed water is increased, the amount of heat absorbed by the fed water in the boiler is reduced, the gas consumption is reduced and the energy conservation and emission reduction aims are achieved.
Description
Technical field
The present invention relates to heat reclaim unit, particularly relate to a kind of flue gas waste heat recovery system of mechanical compression type heat pump cycle.
Background technology
In order to change the Urumchi air pollution problems inherent that winter, coal heating caused, from 2010, Urumqi City starts " coal changes gas " engineering.The enforcement of " coal changes gas " engineering brings the blue sky and white cloud in Urumchi.At present, the clean energy resource heat supply ratio of main city zone Tianshan District, Urumqi City, Shayibak District, high and new technology industrial development zone (Xinshi District), Shuimogou District, Midong District reaches 100%, thoroughly achieve natural gas heating, become the city that first, the whole nation adopts natural gas heating.By the end of heating period in 2014, altogether hot water amount 10-100 ten thousand tons of gas fired-boiler more than 700 platforms are installed, these gas fired-boilers absorb fume afterheat by installing tail flue gas air preheater, make flue gas temperature of hearth outlet be reduced to 60-65 degree Celsius from 130-140 degree Celsius, be then discharged to air from chimney.At present retracting device is not adopted for the fume afterheat of low-grade 60-65 degree Celsius.
For the recovery of the flue-gas temperature of furnace outlet 130-140 degree Celsius, absorb fume afterheat by installing tail flue gas air preheater on the flue of gas fired-boiler at present, the high-temperature flue gas of 130-140 degree Celsius of discharging from gas fired-boiler burner hearth is incorporated into the air preheater that flue installs, this air preheater utilizes high-temperature flue gas waste-heat cold air, cold air is heated to form hot-air and sends into hearth combustor, for with natural gas mixed combustion, the low-temperature flue gas becoming 60-65 degree after high-temperature flue gas heat release enters air.
The flue of gas fired-boiler absorbs by installing tail flue gas air preheater the scheme shortcoming of fume afterheat, the mode of different transfer of heat can only be utilized as driving force to utilize waste heat, make low-grade utilization rate of waste heat not high, cause the exhaust gas temperature of gas fired-boiler low not, exist and utilize other technologies to utilize the space of low-grade waste heat further.
Summary of the invention
The present invention is to solve above-mentioned deficiency, provides a kind of flue gas waste heat recovery system of mechanical compression type heat pump cycle.
Above-mentioned purpose of the present invention is realized by following technical scheme: a kind of flue gas waste heat recovery system of mechanical compression type heat pump cycle, comprise gas fired-boiler and air preheater, it is characterized in that: also comprise mechanical compression type heat pump assembly and small turbine, described mechanical compression type heat pump assembly comprises the evaporimeter being in turn connected into loop, compressor, condenser and throttle mechanism, evaporimeter is provided with the discharge pipe for discharging flue gas and condensate water, condenser is provided with boiler low-temperature to aquaporin and boiler high temperature water-supply passage, boiler high temperature water-supply expanding channels is to gas fired-boiler,
Described gas fired-boiler is provided with high temp. flue and steam branched bottom;
Described high temp. flue connects air preheater, and air preheater is provided with inlet of cold air, and is provided with hot air outlet expanding channels to gas fired-boiler, is provided with low-temperature flue gas expanding channels to evaporimeter simultaneously;
The steam branched bottom of described gas fired-boiler connects small turbine, and small turbine is provided with condensed water passage, and connects compressor, and for providing driving force, condensed water passage is connected to boiler high temperature water-supply passage.
Operation principle of the present invention is: the high-temperature flue gas of 130-140 degree Celsius of discharging from gas fired-boiler burner hearth is incorporated into the air preheater that flue installs, this air preheater utilizes high-temperature flue gas waste-heat cold air, cold air is heated to form hot-air and sends into gas fired-boiler burner hearth, for with natural gas mixed combustion, the low-temperature flue gas becoming 60-65 degree Celsius after high-temperature flue gas heat release enters the evaporimeter in mechanical compression heat pump device.When in mechanical compression type heat pump assembly, the liquid refrigerant working medium of low-temp low-pressure flows through evaporimeter, from low-temperature flue gas, absorb heat of vaporization become gaseous refrigerant working medium, 10-15 degree Celsius of flue gas is become and condensate water enters environment after low-temperature flue gas heat release, low-temp low-pressure gaseous refrigerant working medium, increasing temperature and pressure after compressor compresses, the gaseous refrigerant working medium of high pressure of reaching a high temperature flows through condenser, within the condenser, part heat suitable with compressor wasted work for the heat drawn from evaporimeter is used for heating boiler low temperature feedwater, boiler low-temperature is fed water and is become the high temperature water-supply of gas fired-boiler by heating, temperature raises 5-8 degree Celsius, liquefy after the gaseous refrigerant working fluid condenses cooling of HTHP, after flowing through throttle mechanism expansion, pressure continues to decline, become low-temp low-pressure liquid refrigerant working medium and flow into evaporimeter.
What deserves to be explained is that the driving of this compressor is not that the motor adopted drives, but the steam utilizing gas fired-boiler to produce, sub-fraction steam drive small turbine is drawn from gas fired-boiler drum, small turbine is driving compressor operating by shaft coupling, steam becomes condensed water after small turbine expansion work, and being then mixed with the high temperature water-supply of boiler high temperature water-supply passage is sent to boiler.
The present invention's advantage is compared with prior art: the present invention adopts heat pump techniques to reclaim gas fired-boiler 60-65 degree Celsius of fume waste heat, for the feedwater of heating boiler, improve the temperature 5-8 degree Celsius of feedwater, reduce feedwater caloric receptivity in the boiler, to reduce gas quantity, reach the object of energy-saving and emission-reduction.Meanwhile, the steam utilizing boiler to produce drives small turbine, then drives compressor operating, decreases using and improve energy utilization rate of electric energy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, a kind of flue gas waste heat recovery system of mechanical compression type heat pump cycle, comprise gas fired-boiler 1, air preheater 2, mechanical compression type heat pump assembly 3 and small turbine 4, described mechanical compression type heat pump assembly 3 comprises the evaporimeter 3-1, compressor 3-2, condenser 3-3 and the throttle mechanism 3-4 that are in turn connected into loop, evaporimeter 3-1 is provided with the discharge pipe 3-5 for discharging flue gas and condensate water, condenser 3-3 is provided with boiler low-temperature to aquaporin 3-6 and boiler high temperature water-supply passage 3-7, and boiler high temperature water-supply passage 3-7 is connected to gas fired-boiler 1;
Described gas fired-boiler 1 is provided with high temp. flue 1-1 and steam branched bottom 1-2;
Described high temp. flue 1-1 connects air preheater 2, and air preheater 2 is provided with inlet of cold air 2-1, and is provided with hot air outlet passage 2-2 and is connected to gas fired-boiler 1, is provided with low-temperature flue gas passage 2-3 simultaneously and is connected to evaporimeter 3-1;
The steam branched bottom 1-2 of described gas fired-boiler 1 connects small turbine 4, and small turbine 4 is provided with condensed water passage 4-1, and connects compressor 3-2, and for providing driving force, condensed water passage 4-1 is connected to boiler high temperature water-supply passage 3-7.
Operation principle of the present invention is: the high-temperature flue gas of 130-140 degree Celsius of discharging from gas fired-boiler 1 burner hearth is incorporated into the air preheater 2 that flue installs, this air preheater 2 utilizes high-temperature flue gas waste-heat cold air, cold air is heated to form hot-air and sends into gas fired-boiler 1 burner hearth, for with natural gas mixed combustion, the low-temperature flue gas becoming 60-65 degree Celsius after high-temperature flue gas heat release enters the evaporimeter 3-1 in mechanical compression heat pump device.When in mechanical compression type heat pump assembly, the liquid refrigerant working medium of low-temp low-pressure flows through evaporimeter 3-1, from low-temperature flue gas, absorb heat of vaporization become gaseous refrigerant working medium, 10-15 degree Celsius of flue gas is become and condensate water enters environment after low-temperature flue gas heat release, low-temp low-pressure gaseous refrigerant working medium, increasing temperature and pressure after compressor 3-2 compresses, the gaseous refrigerant working medium of high pressure of reaching a high temperature flows through condenser 3-3, in condenser 3-3, part heat suitable with compressor 3-2 wasted work for the heat drawn from evaporimeter 3-1 is used for heating boiler low temperature feedwater, boiler low-temperature is fed water and is become the high temperature water-supply of gas fired-boiler by heating, temperature raises 5-8 degree Celsius, liquefy after the gaseous refrigerant working fluid condenses cooling of HTHP, after flowing through throttle mechanism 3-4 expansion, pressure continues to decline, become low-temp low-pressure liquid refrigerant working medium and flow into evaporimeter 3-1.
What deserves to be explained is that the driving of this compressor 3-2 is not that the motor adopted drives, but utilize the steam that gas fired-boiler 1 produces, sub-fraction steam drive small turbine 4 is drawn from gas fired-boiler 1 drum, small turbine 4 is driving compressor 3-2 to run by shaft coupling, steam becomes condensed water after small turbine 4 expansion work, and being then mixed with the high temperature water-supply of boiler high temperature water-supply passage 3-7 is sent to boiler.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (1)
1. the flue gas waste heat recovery system of a mechanical compression type heat pump cycle, comprise gas fired-boiler and air preheater, it is characterized in that: also comprise mechanical compression type heat pump assembly and small turbine, described mechanical compression type heat pump assembly comprises the evaporimeter, compressor, condenser and the throttle mechanism that are in turn connected into loop, evaporimeter is provided with the discharge pipe for discharging flue gas and condensate water, condenser is provided with boiler low-temperature to aquaporin and boiler high temperature water-supply passage, and boiler high temperature water-supply expanding channels is to gas fired-boiler;
Described gas fired-boiler is provided with high temp. flue and steam branched bottom;
Described high temp. flue connects air preheater, and air preheater is provided with inlet of cold air, and is provided with hot air outlet expanding channels to gas fired-boiler, is provided with low-temperature flue gas expanding channels to evaporimeter simultaneously;
The steam branched bottom of described gas fired-boiler connects small turbine, and small turbine is provided with condensed water passage, and connects compressor, and for providing driving force, condensed water passage is connected to boiler high temperature water-supply passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410720619.XA CN104456520A (en) | 2014-12-02 | 2014-12-02 | Circulatory flue gas waste heat recovery system with mechanical compression heat pump |
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| CN201410720619.XA CN104456520A (en) | 2014-12-02 | 2014-12-02 | Circulatory flue gas waste heat recovery system with mechanical compression heat pump |
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| CN104456520A true CN104456520A (en) | 2015-03-25 |
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| CN201410720619.XA Pending CN104456520A (en) | 2014-12-02 | 2014-12-02 | Circulatory flue gas waste heat recovery system with mechanical compression heat pump |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864581A (en) * | 2015-05-11 | 2015-08-26 | 杭州兴环科技开发有限公司 | Method and system for combining fuel conversion system with heat pump and natural cooling device |
| CN107477647A (en) * | 2017-08-29 | 2017-12-15 | 山东宏力热泵能源股份有限公司 | Condenser boiler and heat pump united heating system |
| CN107551751A (en) * | 2017-08-30 | 2018-01-09 | 江苏汇创流体工程装备科技有限公司 | Moisture and heat recovery and utilization method and its system in a kind of coal-burning power plant's discharge flue gas |
| CN108072029A (en) * | 2016-11-16 | 2018-05-25 | 华北电力大学（保定） | A kind of steam generating system of recovery boiler smoke discharging residual heat |
| CN109386837A (en) * | 2017-08-09 | 2019-02-26 | 新疆工程学院 | A kind of flue gas waste heat recovery system of solar wind-energy combination drive mechanical compression type heat pump cycle |
| CN109708094A (en) * | 2018-05-24 | 2019-05-03 | 国能科创节能技术（北京）有限公司 | Vapour for Mist heat recovering drags heat pump system |
| CN110030571A (en) * | 2019-05-20 | 2019-07-19 | 北京华誉智慧能源科技有限责任公司 | A kind of system taking off the recycling of bletilla waste heat for flue gas |
| CN113776233A (en) * | 2021-08-23 | 2021-12-10 | 天津大学 | Novel intelligence spray column and heat pump contain sulphur flue gas waste heat recovery system |
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| CN204268454U (en) * | 2014-12-02 | 2015-04-15 | 代元军 | A kind of flue gas waste heat recovery system of mechanical compression type heat pump cycle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864581A (en) * | 2015-05-11 | 2015-08-26 | 杭州兴环科技开发有限公司 | Method and system for combining fuel conversion system with heat pump and natural cooling device |
| CN108072029A (en) * | 2016-11-16 | 2018-05-25 | 华北电力大学（保定） | A kind of steam generating system of recovery boiler smoke discharging residual heat |
| CN109386837A (en) * | 2017-08-09 | 2019-02-26 | 新疆工程学院 | A kind of flue gas waste heat recovery system of solar wind-energy combination drive mechanical compression type heat pump cycle |
| CN107477647A (en) * | 2017-08-29 | 2017-12-15 | 山东宏力热泵能源股份有限公司 | Condenser boiler and heat pump united heating system |
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| CN109708094A (en) * | 2018-05-24 | 2019-05-03 | 国能科创节能技术（北京）有限公司 | Vapour for Mist heat recovering drags heat pump system |
| CN110030571A (en) * | 2019-05-20 | 2019-07-19 | 北京华誉智慧能源科技有限责任公司 | A kind of system taking off the recycling of bletilla waste heat for flue gas |
| CN113776233A (en) * | 2021-08-23 | 2021-12-10 | 天津大学 | Novel intelligence spray column and heat pump contain sulphur flue gas waste heat recovery system |
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Application publication date: 20150325 |