CN108731022B - White smoke plume treatment and energy recovery system - Google Patents
White smoke plume treatment and energy recovery system Download PDFInfo
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- CN108731022B CN108731022B CN201810598083.7A CN201810598083A CN108731022B CN 108731022 B CN108731022 B CN 108731022B CN 201810598083 A CN201810598083 A CN 201810598083A CN 108731022 B CN108731022 B CN 108731022B
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- heat pump
- absorption heat
- pipeline
- absorption
- heat
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- 239000000779 smoke Substances 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 claims abstract description 97
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000003546 flue gas Substances 0.000 claims abstract description 43
- 230000001172 regenerating effect Effects 0.000 claims abstract description 17
- 238000009833 condensation Methods 0.000 claims abstract description 16
- 230000005494 condensation Effects 0.000 claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims abstract description 15
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000003245 coal Substances 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000009977 dual effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 238000003303 reheating Methods 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
- F23J2900/15081—Reheating of flue gases
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a white smoke plume treatment and energy recovery system, which belongs to the field of energy conservation and environmental protection of boilers, and comprises the following components: the system comprises a steam turbine regenerative system, a flue gas condenser, a flue gas reheater, a fan heater, a chimney and a desulfurizing tower, and is characterized in that: the system also comprises a first absorption heat pump, a second absorption heat pump and a driving steam pipeline, wherein the heat-absorbing end of the first absorption heat pump is connected with the flue gas condenser through a first refrigerant water pipeline, and the heat-releasing end of the first absorption heat pump is connected with the flue gas reheater through a first heat refrigerant water pipeline; the heat absorption end of the second absorption heat pump is connected with the flue gas condenser through a second refrigerant water pipeline, and the heat release end of the second absorption heat pump is connected with the fan heater and the condensation water pipeline of the steam turbine heat recovery system through a second heat medium water pipeline. The method has the advantages that the condensation heat of the flue gas is fully utilized, the white flue gas plume is eliminated, the power generation coal consumption is reduced, and the dual purposes of environmental protection and energy saving are achieved.
Description
Technical Field
The invention belongs to the field of energy conservation and environmental protection of boilers, is suitable for flue gas treatment in industries of electric power, steel, coking and the like, and relates to a white smoke plume treatment and energy recovery system.
Background
At present, the technology for treating white smoke plume mainly comprises smoke reheating and reheating after the smoke is cooled, however, although the smoke reheating technology can lighten the visual influence caused by the white smoke plume, serious white smoke plume phenomenon still can be generated when the ambient temperature is lower than 5 ℃, and the technology mainly comprises the step that the reheating technology can not effectively remove water vapor in saturated smoke after desulfurization and aerosol taken away in the smoke. Therefore, the flue gas condensation and reheating become the current main technology, water vapor can be recovered in the flue gas condensation process, aerosol is condensed in the condensation process and is collected along with liquid water drops, and then the flue gas diffusion capacity is improved by reheating. Although the technology can effectively treat white smoke plumes, two problems still exist: 1. the flue gas cooling needs a cold source, and the system needs to increase the investment of a cooling tower; 2. the flue gas heating requires energy input and steam extraction of a steam turbine is required to heat the flue gas.
In the prior art, only the removal of water vapor is considered in the treatment of white smoke plume of the smoke, and a large amount of waste heat is brought by the condensation of the water vapor, so that the recycling of the waste heat is not considered in the prior art. And the part of waste heat finally enters the environment through the air cooling tower or the cold water tower, so that a large amount of energy is wasted.
Disclosure of Invention
The invention aims to overcome the defects of the existing flue gas whitening waste energy and lack of a cold source, thereby providing a white flue gas plume treatment and energy recovery system. The system adopts an absorption heat pump as energy recovery and cold source providing equipment, recovers the waste heat of flue gas while providing cooling water required by a condenser, and can provide higher-grade heat to heat condensed flue gas through high-temperature heat source driving.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a white plume is administered and energy recovery system, including the steam turbine regenerative system, the flue gas condenser, the flue gas reheat ware, the electric fan heater, the chimney, the desulfurizing tower, the steam turbine regenerative system comprises extraction pipeline, condensate line and heater, add first absorption heat pump, make first absorption heat pump heat absorption end be connected with the flue gas condenser through first refrigerant pipeline, make first absorption heat pump heat release end be connected with the flue gas reheat ware through first heat medium pipeline, add the second absorption heat pump, make second absorption heat pump heat absorption end be connected with the flue gas condenser through second refrigerant pipeline, make second absorption heat pump heat release end be connected with electric fan heater and steam turbine regenerative system condensate line through second heat medium pipeline, add drive steam pipeline, make steam turbine regenerative system extraction pipeline be connected with first absorption heat pump drive end and second absorption heat pump drive end through drive steam pipeline.
In the white smoke plume treatment and energy recovery system, in the connection of the first absorption heat pump and the second absorption heat pump and the steam extraction pipeline of the steam turbine regenerative system, the first absorption heat pump and the second absorption heat pump are connected in parallel, namely, driving steam is provided for the first absorption heat pump and the second absorption heat pump simultaneously through the driving steam pipeline.
In the white smoke plume treatment and energy recovery system, in the connection of the heat release end of the second absorption heat pump and the condensation water pipeline of the warm air blower and the steam turbine heat recovery system, the warm air blower and the condensation water pipeline of the steam turbine heat recovery system are connected in parallel, namely the second absorption heat pump simultaneously provides heat energy for the condensation water of the warm air blower and the steam turbine heat recovery system through the second heat medium water pipeline.
The plurality of the steam extraction pipelines are corresponding to different steam parameters, and the steam extraction pipeline connected with the driving steam pipeline is selected according to the driving steam requirements of the first absorption heat pump and the second absorption heat pump.
The plurality of heaters are corresponding to different in-out condensate parameters, and are connected through a condensate pipeline, and the positions on the condensate pipeline connected with the second heat medium pipeline are selected according to the heat medium parameters provided by the second absorption heat pump and the in-out condensate parameters of the heaters.
The invention has the advantages that:
(1) Compared with other white smoke plume treatment technologies, the invention recovers the waste heat of the desulfurized smoke, and improves the utilization rate of energy sources;
(2) The absorption heat pump used by the invention can recover waste heat and simultaneously provide required cold energy for the flue gas condenser, and the investment of an investment cooling tower is not required to be increased.
(3) The white smoke plume treatment and energy recovery system provided by the invention utilizes the phase change heat generated by smoke condensation to heat the condensed smoke, and can be used for increasing the temperature of condensation water and reducing the power generation coal consumption.
(4) The energy recovery system provided by the invention can effectively utilize the advantages of the absorption heat pump, and can effectively utilize the heat and the cold energy generated by the heat pump in summer and winter.
Drawings
FIG. 1 is a schematic diagram of a white plume abatement and energy recovery system in an embodiment of the invention.
Fig. 2 is a schematic diagram of the connection ends of a first absorption heat pump and a second absorption heat pump selected for use in the present invention.
Wherein: the system comprises a steam turbine regenerative system 1, a steam extraction pipeline 1-1, a heater 1-2, a condensation pipeline 1-3, a chimney 2, a flue gas reheater 3, a flue gas condenser 4, a desulfurizing tower 5, a fan heater 6, a driving steam pipeline 7, a steam turbine 8, a second absorption heat pump 9, a second absorption heat pump heat absorption end 9-1, a second absorption heat pump heat release end 9-2, a second absorption heat pump driving end 9-3, a second heat medium pipeline 10, a second refrigerant pipeline 11, a first absorption heat pump 12, a first absorption heat pump heat absorption end 12-1, a first absorption heat pump heat release end 12-2, a first absorption heat pump driving end 12-3, a first refrigerant pipeline 13, a first heat medium pipeline 14 and a boiler 15.
Detailed Description
Examples
The invention is further described below with reference to the drawings and examples.
Referring to fig. 1 and 2, the white smoke plume treatment and energy recovery system of the invention comprises a steam turbine regenerative system 1, a smoke condenser 4, a smoke reheater 3, a fan heater 6, a chimney 2 and a desulfurizing tower 5, wherein the steam turbine regenerative system consists of a steam extraction pipeline 1-1, a condensed water pipeline 1-3 and a heater 1-2, a first absorption heat pump 12 is additionally arranged, a first absorption heat pump heat extraction end 12-1 is connected with the smoke condenser 4 through a first refrigerant pipeline 13, a first absorption heat pump heat release end 12-2 is connected with the smoke reheater 3 through a first heat medium pipeline 14, a second absorption heat pump 9 is additionally arranged, the second absorption heat pump heat release end 9-1 is connected with the smoke condenser 4 through a second refrigerant pipeline 11, the second absorption heat pump heat release end 9-2 is connected with the fan heater 6 and the condensed water pipeline 1-3 of the steam turbine regenerative system 1 through a second heat medium pipeline 10, a driving steam pipeline 7 is additionally arranged, and the steam extraction pipeline 1-1 of the steam turbine regenerative system is connected with the first absorption heat pump drive end 12-3 and the second absorption heat pump drive end 9-3 through the driving steam pipeline 7.
In the connection of the first and second absorption heat pumps 12, 9 to the extraction duct 1-1 of the steam turbine regenerator system 1, the first and second absorption heat pumps 12, 9 are connected in parallel, i.e. drive steam is supplied to both the first and second absorption heat pumps 12, 9 via the drive steam duct 7.
In the connection of the second absorption heat pump heat release end 9-2 and the fan heater 6 and the condensed water pipeline 1-3 of the steam turbine heat recovery system 1, the fan heater 6 and the condensed water pipeline 6-3 of the steam turbine heat recovery system 6 are connected in parallel, namely the second absorption heat pump 9 provides heat energy for condensed water of the fan heater 6 and the steam turbine heat recovery system 1 through the second heat medium water pipeline 10.
The steam turbine regenerative system 1 shown in fig. 1 is provided with a plurality of (5 are shown in the figure, the number is more than 2) steam extraction pipelines 1-1, and each steam extraction pipeline 1-1 corresponds to different steam parameters because the steam extraction positions of the steam extraction pipelines are different; the extraction conduit 1-1 to which the drive vapor conduit 7 is connected in the practice of the present invention is selected based on the drive vapor parameter requirements of the first absorption heat pump 12 and the second absorption heat pump 9. Typically the absorption heat pump is driven at a pressure of 0.2-0.8MPa, and if the extraction pressure in some of the extraction lines 1-1 is in this range, these lines may be connected to the first absorption heat pump 12 and the second absorption heat pump 9 via the driving vapor line 7 to supply driving vapor to the heat pumps.
The number of the heaters 1-2 in the steam turbine regenerative system 1 is a plurality (4 are shown in fig. 1, and the number is more than 2), and each heater corresponds to different in-out condensate parameters and is connected by a condensate pipeline 1-2; the position on the condensed water pipe 1-2 connected with the second heat medium pipe 10 (the connection position is shown as the inlet and outlet of the third heater 1-2) is selected according to the heat medium water parameter provided by the second absorption heat pump 9 and the condensing water inlet and outlet parameter of the heater 1-2. The absorption heat pump provides a heat medium water temperature of not more than 90 c, so it is required that the heated condensation water temperature is lower than this temperature.
Fig. 2 is a schematic view of the external end portions of the first absorption heat pump 12 and the second absorption heat pump 9. The heat absorption end, the heat release end and the driving end of the first absorption heat pump 12 are respectively 12-1, 12-2 and 12-3; the heat absorption end, the heat release end and the driving end of the second absorption heat pump 9 are respectively 9-1, 9-2 and 9-3. In the practice of the present invention, the number of first absorption heat pumps 12 and 9 required is selected based on the flue gas condensing heat load and the thermodynamic calculation, and may not be one each.
The working principle of the embodiment is as follows:
(1) The first absorption type hot pump hot end 12-1 provides a cold source (low-temperature refrigerant water) for the flue gas condenser 4, so that the clean flue gas treated by the desulfurizing tower 5 is cooled, part of water vapor in the flue gas is condensed, and the moisture content of the flue gas is reduced; the temperature of the refrigerant water in the flue gas condenser 4 is increased to become high-temperature refrigerant water, the high-temperature refrigerant water returns to the first absorption heat pump 12, the heat pump pumps the heat obtained by the heat pumping end 12-1 of the first absorption heat pump into the heat discharging end 12-2 of the first absorption heat pump to heat the heat medium water to become high-temperature heat medium water, the high-temperature heat medium water is used for heating the condensed low-temperature flue gas, the temperature of the flue gas is increased again, the flue gas is reheated and enters the chimney 2, and finally the flue gas is discharged into the atmosphere.
The first absorption heat pump 12 extracts low temperature heat energy from the flue gas condensation, improves the grade of heat, and changes the heat energy into high temperature heat energy to reheat the flue gas.
(2) The second absorption heat pump 9 operates on the same principle as the first absorption heat pump 12 and also obtains low-temperature heat energy from the desulfurized flue gas, but the high-temperature heat energy output is used to heat cold air supplied to the boiler 15 via the fan heater 6 for combustion and condensed water returned to the boiler 15 from the steam turbine 8, and the heat energy in the flue gas plume management condensation process is utilized.
Claims (3)
1. A white plume abatement and energy recovery system comprising: the steam turbine regenerative system (1), flue gas condenser (4), flue gas reheater (3), electric fan heater (6), chimney (2) and desulfurizing tower (5), steam turbine regenerative system (1) are including extraction pipeline (1-1), condensed water pipeline (1-3) and heater (1-2), its characterized in that: the white smoke plume treatment and energy recovery system further comprises a first absorption heat pump (12), a second absorption heat pump (9) and a driving steam pipeline (7), wherein the heat-absorbing end of the first absorption heat pump is connected with the smoke condenser (4) through a first refrigerant pipeline (13), and the heat-releasing end of the first absorption heat pump is connected with the smoke reheater (3) through a first heat medium pipeline (14); the heat absorption end of the second absorption heat pump is connected with the flue gas condenser (4) through a second refrigerant water pipeline (11), and the heat release end of the second absorption heat pump is connected with the warm air blower (6) and the condensation water pipeline (1-3) of the steam turbine heat recovery system (1) through a second heat medium water pipeline (10); the steam extraction pipeline (1-1) of the steam turbine regenerative system (1) is connected with the driving end of the first absorption heat pump and the driving end of the second absorption heat pump by driving the steam pipeline (7);
in the connection of the first absorption heat pump (12) and the second absorption heat pump (9) with the steam extraction pipeline (1-1) of the steam turbine regenerative system (1), the first absorption heat pump (12) and the second absorption heat pump (9) are connected in parallel, namely driving steam is simultaneously provided for the first absorption heat pump (12) and the second absorption heat pump (9) through the driving steam pipeline (7);
in the connection of the heat release end of the second absorption heat pump with the fan heater (6) and the condensed water pipeline (1-3) of the steam turbine heat recovery system (1), the fan heater (6) and the condensed water pipeline (1-3) of the steam turbine heat recovery system (1) are connected in parallel, namely the second absorption heat pump (9) simultaneously provides heat energy for the fan heater (6) and the condensed water of the steam turbine heat recovery system (1) through the second heat medium water pipeline (10).
2. The white plume abatement and energy recovery system according to claim 1, wherein the plurality of extraction pipes (1-1) each correspond to a different steam parameter, the extraction pipe (1-1) connected to the driving steam pipe (7) being selected according to the driving steam requirements of the first absorption heat pump (12) and the second absorption heat pump (9).
3. The white smoke plume treatment and energy recovery system according to claim 1, wherein the number of the heaters (1-2) is a plurality, each heater (1-2) corresponds to different in-out condensate parameters, the heaters are connected by a condensate pipeline (1-3), and the positions on the condensate pipeline (1-3) connected with the second heat medium pipeline (10) are matched and selected according to the heat medium parameters provided by the second absorption heat pump (9) and the in-out condensate parameters of the heaters (1-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810598083.7A CN108731022B (en) | 2018-06-12 | 2018-06-12 | White smoke plume treatment and energy recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810598083.7A CN108731022B (en) | 2018-06-12 | 2018-06-12 | White smoke plume treatment and energy recovery system |
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| Publication Number | Publication Date |
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| CN108731022A CN108731022A (en) | 2018-11-02 |
| CN108731022B true CN108731022B (en) | 2024-04-02 |
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| CN201810598083.7A Active CN108731022B (en) | 2018-06-12 | 2018-06-12 | White smoke plume treatment and energy recovery system |
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| CN109990305B (en) * | 2019-03-19 | 2023-09-15 | 华电电力科学研究院有限公司 | White smoke plume eliminating device for coal-fired power plant and working method |
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| CN108731022A (en) | 2018-11-02 |
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