CN103017140A - Flue gas waste heat recovery device of biomass power plant - Google Patents
Flue gas waste heat recovery device of biomass power plant Download PDFInfo
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- CN103017140A CN103017140A CN2012105830211A CN201210583021A CN103017140A CN 103017140 A CN103017140 A CN 103017140A CN 2012105830211 A CN2012105830211 A CN 2012105830211A CN 201210583021 A CN201210583021 A CN 201210583021A CN 103017140 A CN103017140 A CN 103017140A
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Abstract
The invention relates to a heat recovery device, and discloses a flue gas waste heat recovery device of a biomass power plant. The flue gas waste heat recovery device comprises a steam line, a cooling water circulation line, a desalted water line and a flue gas heat exchange line, wherein a flue gas heat exchanger is arranged on the flue gas heat exchange line, and flue gas returns to the flue gas heat exchanger after heat is absorbed by an absorption heat pump. The flue gas waste heat recovery device recovers waste heat in flue gas and slag of the biomass power plant in a heat exchange mode and has the advantages of high recovery use ratio of heat energy, energy conservation, environmental protection and the like.
Description
Technical field
The present invention relates to a kind of heat reclamation device, relate in particular to a kind of biomass electric power plant cigarette wind waste heat recovery plant.
Background technology
The cigarette wind-heat of biomass power plant enters atmosphere by chimney and forms huge heat-energy losses, is the low main cause of biomass power plant energy use efficiency, not only causes the waste of energy and water or electricity, has also seriously polluted atmosphere simultaneously.The important difference in biomass power plant and thermal power plant just is that sulfur content is extremely low in the burnt gas of biomass power plant, also can not form sulfuric acid, etching apparatus after the condensation.So biomass electric power plant does not have certain temperature requirement to the cigarette wind that it discharges, the heat in the cigarette wind can be recycled fully.
Summary of the invention
The present invention is directed to that cigarette wind used heat is difficult to reclaim and the problem of utilizing in the prior art, a kind of biomass electric power plant cigarette wind waste heat recovery plant that adopts heat pump techniques to reclaim power plant's cigarette wind waste heat is provided.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
A kind of biomass electric power plant cigarette wind waste heat recovery plant, comprise steam pipework, cooling water circulation pipeline, demineralized water pipeline, also comprise the flue gas heat exchange pipeline, described flue gas heat exchange pipeline is provided with flue gas heat-exchange unit, after the absorption heat pump heat absorption, get back to flue gas heat-exchange unit.Also be provided with the flue gas heat exchange circulating pump in the described flue gas heat exchange pipeline.Described flue gas heat exchange pipeline absorbs heat through flue gas heat-exchange unit, is connected to absorption heat pump and carries out heat release, and then by the effect of flue gas heat exchange circulating pump, the flue gas heat exchange pipeline loops back the used heat of receiving in the flue gas, and offers absorption heat pump.
As preferably, described demineralized water pipeline comprises sweet-water tank and slag heat exchanger, through getting back to sweet-water tank by the demineralized water discharge pipe line behind the water water-to-water heat exchanger.Described demineralized water discharge pipe line is provided with demineralized water discharge pipe line control valve, is provided with the deoxygenation pipeline between water water-to-water heat exchanger and the demineralized water discharge pipe line control valve, and the deoxygenation pipeline is connected with oxygen-eliminating device.Described oxygen-eliminating device passes into boiler feedwater by feed pump.When demineralized water discharge pipe line control valve was closed, the water in the demineralized water pipeline was back to sweet-water tank after by the water water-to-water heat exchanger; When demineralized water discharge pipe line control valve was opened, the water in the demineralized water pipeline entered oxygen-eliminating device by the deoxygenation pipeline after by the water water-to-water heat exchanger.
As preferably, described steam pipework connects steam turbine and condenser; The cooling water circulation pipeline is got back to the cool cycles pond through behind condenser, absorption heat pump and the cooling tower from the cool cycles pond.Also be provided with coolant circulation pump in the described cooling water circulation pipeline.
As preferably, described biomass electric power plant cigarette wind waste heat recovery plant also comprises inner loop pipeline, and inner loop pipeline is through absorption heat pump and water water-to-water heat exchanger.Also be provided with on the described inner loop pipeline for hot recycle pump.Inner loop pipeline carries out heat exchange by the absorption heat pump on the cooling water circulation pipeline and obtains heat energy, then by the water water-to-water heat exchanger heat energy that obtains is passed to the demineralized water pipeline in the mode of heat exchange.
As preferably, described steam pipework is through steam turbine, and the steam exhaust steam that produces after the steam turbine acting is delivered to condenser, and exhaust steam becomes thermal energy transfer into condensate water after to the cooling water in the cooling water circulation pipeline through condenser and enters sweet-water tank.
The present invention is by adopting heat pump techniques to reclaim biomass electric power plant cigarette wind waste heat, and it is high to have the heat energy recycle rate, the advantage of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Wherein: 1-steam pipework, 2-cooling water circulation pipeline, 3-flue gas heat exchange pipeline, 4-inner loop pipeline, 5-demineralized water pipeline, 6-flue gas heat-exchange unit, 7-absorption heat pump, 8-cooling tower, 9-water water-to-water heat exchanger, 10-slag heat exchanger, 11-steam turbine, 12-condenser, 21-cool cycles pond, 22-coolant circulation pump, 31-flue gas heat exchange circulating pump, 41-internal circulation pump, 51-sweet-water tank, 52-control valve, 53-oxygen-eliminating device, 54-feed pump.
The specific embodiment
Below in conjunction with accompanying drawing 1 and the specific embodiment the present invention is described in further detail:
A kind of biomass electric power plant cigarette wind waste heat recovery plant as shown in Figure 1, comprises steam pipework 1, cooling water circulation pipeline 2, flue gas heat exchange pipeline 3, inner loop pipeline 4 and demineralized water pipeline 5.
Described steam pipework 1 connects steam turbine 11 and condenser 12; Cooling water circulation pipeline 2 is from cool cycles pond 21, through getting back to cool cycles pond 21 behind coolant circulation pump 22, condenser 12, absorption heat pump 7 and the cooling tower 8.The steam exhaust steam that steam turbine 11 produces is delivered to condenser 12, the steam exhaust steam through condenser 12 with thermal energy transfer to the cooling water in the cooling water circulation pipeline 2, absorb through absorption heat pump 7 and carry out heat exchange at absorption heat pump 7 and inner loop pipeline 4 with the cooling water of heat energy, inner loop pipeline 4 by water water-to-water heat exchanger 9 with thermal energy transfer to demineralized water pipeline 5.
Cooling water circulation pipeline 2 also passes through cooling tower 8, and cooling tower 8 is arranged between absorption heat pump 7 and the water water-to-water heat exchanger 9.By cooling tower 8 is set, the cooling water through absorption heat pump 7 further can be cooled off, and cool cycles pond 21 is delivered in transmission.Cooling water circulation pipeline 2 is provided with coolant circulation pump 22, and coolant circulation pump 22 is arranged between cool cycles pond 21 and the condenser 12.Cooling water circulation pipeline 2 passes through absorption heat pump 7, cooling tower 8 successively, discharges heat energy at absorption heat pump 7 places.
The steam of steam pipework 1 is through steam turbine 11 actings, and the steam exhaust steam that steam turbine 11 is produced is delivered to condenser 12, and the steam exhaust steam becomes thermal energy transfer into condensate water after to the cooling water in the cooling water circulation pipeline 2 through condenser 12 and enters sweet-water tank 51.Steam work done in steam turbine that boiler produces, in the cyclic process of this heating agent, need to emit a large amount of condensation heat, steam exhaust steam after the steam turbine work done enters condenser 12 by steam discharge, in the process of condenser 12 condensations, discharge heat energy and condense into water and enter sweet-water tank 51, after demineralized water pipeline 5, slag heat exchanger 10, water water-to-water heat exchanger 9, oxygen-eliminating device 53, flue gas heat-exchange unit 6 heating, enter boiler again, at this moment, raise through the cooling water temperature in the condenser 12 cooling water circulation pipelines 2.
Described flue gas heat exchange pipeline 3 is provided with flue gas heat-exchange unit 6, after absorption heat pump 7 heat absorptions, gets back to flue gas heat-exchange unit 6.Also be provided with flue gas heat exchange circulating pump 31 in the described flue gas heat exchange pipeline.Described flue gas heat exchange pipeline absorbs heat through flue gas heat-exchange unit 6, water temperature in the flue gas heat exchange pipeline 3 is reached more than 145 ℃, and then be connected to absorption heat pump 7 release heat, then pass through the effect of flue gas heat exchange circulating pump, the used heat in the flue gas heat exchange pipeline 3 circulation recovered flue gas.Hot water in the flue gas heat exchange pipeline 3 also carries out heat exchange with inner loop pipeline 4 through absorption heat pump 7 after absorption heat pump 7 heat absorptions, inner loop pipeline 4 by water water-to-water heat exchanger 9 with thermal energy transfer to demineralized water pipeline 5.
Present embodiment also comprises inner loop pipeline 4, and inner loop pipeline 4 is through absorption heat pump 7 and water water-to-water heat exchanger 9.Inner loop pipeline 4 carries out heat exchange by the absorption heat pump 7 on the cooling water circulation pipeline 2 and obtains heat energy, then by water water-to-water heat exchanger 9 heat energy that obtains is passed to demineralized water pipeline 5 in the mode of heat exchange.Inner loop pipeline 4 is provided with internal circulation pump 41, and internal circulation pump 41 is arranged between absorption heat pump 7 and the water water-to-water heat exchanger 9.Water in the inner loop pipeline 4 is through absorption heat pump 7, and higher through the interior circulating water temperature of absorbing heat, water temperature reaches about 90 ℃, then discharges behind the heat energy below the drop in temperature to 53 ℃ through water water-to-water heat exchanger 9.
Described demineralized water pipeline 5 connects sweet-water tank 51 and slag heat exchanger 10, through getting back to sweet-water tank 51 by the demineralized water discharge pipe line behind the water water-to-water heat exchanger 9.Described slag heat exchanger 10 is by the waste heat in the mode recovery boiler waste residue of heat exchange.Demineralized water pipeline 5 is provided with demineralized water pipeline circulating pump, and demineralized water pipeline circulating pump is arranged between water water-to-water heat exchanger 9 and the slag heat exchanger 10.Heat energy in the demineralized water pipeline 5 obtains by water water-to-water heat exchanger 9 and slag heat exchanger 10.Water temperature is elevated to 50 ℃ behind the demineralized water pipeline 5 process slag heat exchangers 10, and then through again absorbing heat energy behind the water water-to-water heat exchanger 9, water temperature reaches above 70 ℃.
Also be provided with demineralized water discharge pipe line control valve 52 on the described demineralized water discharge pipe line, be provided with the deoxygenation pipeline between water water-to-water heat exchanger 9 and the demineralized water discharge pipe line control valve 52, the deoxygenation pipeline is connected with oxygen-eliminating device 53.Described oxygen-eliminating device 53 pumps into boiler feedwater by feed pump 54.When demineralized water discharge pipe line control valve 52 was closed, the water in the demineralized water pipeline was back to sweet-water tank 51 after by water water-to-water heat exchanger 9; When demineralized water discharge pipe line control valve 52 was opened, the water in the demineralized water pipeline entered oxygen-eliminating device 53 by the deoxygenation pipeline, and then enter boiler by feed pump 54, flue gas heat-exchange unit 6 afterwards by water water-to-water heat exchanger 9.
After demineralized water pipeline 5 interior water temperatures are increased to more than 70 ℃, open demineralized water discharge pipe line control valve 52, with delivery to oxygen-eliminating device 53.Be connected to further heating in the flue gas heat-exchange unit 6 through the water after oxygen-eliminating device 53 processing by feed pump 54, temperature is elevated to more than 105 ℃, further be connected to boiler feedwater, thereby the afterheat of slags in power plant is effectively recycled, it is high to have the heat energy recycle rate, the advantage of energy-conserving and environment-protective.
More than biomass electric power plant cigarette wind waste heat recovery plant provided by the present invention is described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention all will change in specific embodiments and applications, can do respective change according to actual needs.In sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. biomass electric power plant cigarette wind waste heat recovery plant, comprise steam pipework (1), cooling water circulation pipeline (2), demineralized water pipeline (5), it is characterized in that: also comprise flue gas heat exchange pipeline (3), described flue gas heat exchange pipeline (3) is provided with flue gas heat-exchange unit (6), after absorption heat pump (7) heat absorption, get back to flue gas heat-exchange unit (6) by flue gas heat exchange circulating pump (31).
2. biomass electric power plant cigarette wind waste heat recovery plant according to claim 1, it is characterized in that: described demineralized water pipeline (5) comprises sweet-water tank (51) and slag heat exchanger (10), through getting back to sweet-water tank (51) by the demineralized water discharge pipe line behind the water water-to-water heat exchanger (9).
3. biomass electric power plant cigarette wind waste heat recovery plant according to claim 2, it is characterized in that: described demineralized water pipeline (5) is provided with demineralized water discharge pipe line control valve (52), be provided with the deoxygenation pipeline between water water-to-water heat exchanger (9) and the demineralized water discharge pipe line control valve (52), the deoxygenation pipeline is connected with oxygen-eliminating device (53).
4. biomass electric power plant cigarette wind waste heat recovery plant according to claim 1, it is characterized in that: described cooling water circulation pipeline (2) is from cool cycles pond (21), through getting back to cool cycles pond (21) behind coolant circulation pump (22), condenser (12), absorption heat pump (7) and the cooling tower (8).
5. biomass electric power plant cigarette wind waste heat recovery plant according to claim 1, it is characterized in that: also comprise inner loop pipeline (4), inner loop pipeline (4) is through internal circulation pump (41), absorption heat pump (7) and water water-to-water heat exchanger (9).
6. biomass electric power plant cigarette wind waste heat recovery plant according to claim 1, it is characterized in that: after the steam of described steam pipework (1) does work through steam turbine (11), the exhaust steam that steam turbine (11) is discharged is delivered to condenser (12), exhaust steam through condenser (12) with thermal energy transfer to the recirculated cooling water in the recirculated cooling water pipeline (2), after become condensate water and enter sweet-water tank (51).
7. biomass electric power plant cigarette wind waste heat recovery plant according to claim 1, it is characterized in that: described inner loop pipeline (4) is provided with internal circulation pump (41).
8. according to claim 1 to the biomass electric power plant cigarette wind waste heat recovery plant described in 7 any one, it is characterized in that: described oxygen-eliminating device (53) is connected to flue gas heat-exchange unit (6) by feed pump (54), and then is connected to boiler water feeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210583021.1A CN103017140B (en) | 2012-12-25 | 2012-12-25 | Biomass electric power plant cigarette wind waste heat recovery plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210583021.1A CN103017140B (en) | 2012-12-25 | 2012-12-25 | Biomass electric power plant cigarette wind waste heat recovery plant |
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| CN103017140A true CN103017140A (en) | 2013-04-03 |
| CN103017140B CN103017140B (en) | 2016-01-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471421A (en) * | 2013-08-29 | 2013-12-25 | 苏州科特环保设备有限公司 | High-temperature flue gas waste heat recovery device and waste heat recovery method of device |
| CN104848709A (en) * | 2014-02-19 | 2015-08-19 | 王建国 | Process system capable of improving heat efficiency of generator set |
| TWI586798B (en) * | 2016-01-05 | 2017-06-11 | China Steel Corp | Material Heating System for Continuous Carbonization Process |
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| CN101726110A (en) * | 2009-11-20 | 2010-06-09 | 清华大学 | Heatpump type gas-fired boiler waste heat recovery unit |
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| CN102374692A (en) * | 2011-09-29 | 2012-03-14 | 浙江工商大学 | Power-plant waste-heat recovering device |
| CN102425954A (en) * | 2011-12-09 | 2012-04-25 | 昆明理工大学 | Blast furnace slag and slag flushing water waste heat organic working medium supercritical generating system |
| US20120272650A1 (en) * | 2010-01-28 | 2012-11-01 | Hiroshi Ogata | Power generating system |
| CN203024480U (en) * | 2012-12-25 | 2013-06-26 | 李同强 | Heat recovery unit for recovering flue gas and air waste heat of biomass power plant |
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- 2012-12-25 CN CN201210583021.1A patent/CN103017140B/en not_active Expired - Fee Related
Patent Citations (7)
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| CN1414288A (en) * | 2001-10-22 | 2003-04-30 | 清华同方股份有限公司 | Heat supply device capable of recovering aqueous vapour in fuel gas, fuel oil boiler flue gas |
| CN101726110A (en) * | 2009-11-20 | 2010-06-09 | 清华大学 | Heatpump type gas-fired boiler waste heat recovery unit |
| US20120272650A1 (en) * | 2010-01-28 | 2012-11-01 | Hiroshi Ogata | Power generating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471421A (en) * | 2013-08-29 | 2013-12-25 | 苏州科特环保设备有限公司 | High-temperature flue gas waste heat recovery device and waste heat recovery method of device |
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| CN104848709A (en) * | 2014-02-19 | 2015-08-19 | 王建国 | Process system capable of improving heat efficiency of generator set |
| TWI586798B (en) * | 2016-01-05 | 2017-06-11 | China Steel Corp | Material Heating System for Continuous Carbonization Process |
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| CN103017140B (en) | 2016-01-06 |
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