CN107401768A - A kind of heating system and its method using heat pump depth Mist heat recovering - Google Patents
A kind of heating system and its method using heat pump depth Mist heat recovering Download PDFInfo
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- CN107401768A CN107401768A CN201610339041.2A CN201610339041A CN107401768A CN 107401768 A CN107401768 A CN 107401768A CN 201610339041 A CN201610339041 A CN 201610339041A CN 107401768 A CN107401768 A CN 107401768A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- 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
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/126—Absorption type heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/18—Flue gas recuperation
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a kind of heating system and its application method using heat pump depth Mist heat recovering, including the first air-water heat exchanger, wet type desulphurization device, second air-water heat exchanger, 3rd air-water heat exchanger, cooling tower, heat exchanger and absorption heat pump, flue gas passes sequentially through the first air-water heat exchanger, wet type desulphurization device, second air-water heat exchanger, 3rd air-water heat exchanger, then discharged by cooling tower, heat supply network feed pipe and heat supply network return pipe are both provided with branch road, and respectively with the first air-water heat exchanger, second air-water heat exchanger connects, the low-temperature heat source of absorption heat pump is closed cycle water；The present invention not only can reclaim circulating water afterheat with depth, and wet flue gas temperature is reduced into 30~40 DEG C, has good energy-saving benefit, can also substantially reduce the moisture evaporation loss in wet type desulphurization device, save large quantity of moisture.
Description
Technical field
The invention belongs to comprehensive utilization of energy technical field, and in particular to one kind is utilized more than heat pump depth recovered flue gas
The heating system and its application method of heat, being particularly suitable for use in has " nicotinic acids " power plant of wet desulphurization.
Background technology
Thermal power plant consumes the 50% of coal in China total output, and its heat loss due to exhaust gas is with circulating water heating loss
Two maximum in various heat losses in electric power station system, wherein heat loss due to exhaust gas accounts for the 80% of boiler Total heat loss
Even more high, and under pure condensate operating mode, the heat that power plant there are about 45% is dissipated by recirculated water in cooling tower.
Therefore, this two-part waste heat is recycled, is beneficial to further improve the energy profit of thermal power plant
Use efficiency.
At present, with the raising of environmental protection policy requirement, each thermal power plant all utilizes Wet Flue Gas Desulfurization Technique substantially
Desulfurization process is carried out to flue gas, to reduce SO in flue gas2Content.But two thus be present：One
Be into wet desulphurization device flue-gas temperature it is too high, not only reduce desulfuration efficiency, also add moisture
Evaporation loss；Second, the flue-gas temperature of wet desulphurization device outlet is generally 50~60 DEG C, if being arranged using cooling tower
Moisture releasing flue gas, now the temperature of wet flue gas can also further reduce, its recyclable excess heat is also suitable
More a part of heats.Therefore, the input gas temperature of wet desulphurization device how is further effectively reduced
And exit gas temperature, the low temperature exhaust heat of depth recovered flue gas, to power plant it is energy-saving play it is most important
Effect.
The content of the invention
It is an object of the invention to overcome above shortcomings in the prior art, according to " temperature counterpart, step
Using " with can principle a kind of reasonable in design, dependable performance is provided, be advantageous to improve power plant's comprehensive energy efficiency
Utilize the heating system and its application method of heat pump depth Mist heat recovering.
The invention provides a kind of heating system using heat pump depth Mist heat recovering, described utilizes heat pump
The heating system of depth Mist heat recovering includes：First air-water heat exchanger, wet type desulphurization device, the second gas-
Water- to-water heat exchanger, the 3rd air-water heat exchanger, cooling tower, heat exchanger and absorption heat pump；
Described the first air-water heat exchanger, wet type desulphurization device, the second air-water heat exchanger, the 3rd air-water heat exchanger,
Cooling tower passes sequentially through pipeline connection；
Described the second air-water heat exchanger, the 3rd air-water heat exchanger are connected with heat exchanger by pipeline respectively；Institute
The second air-water heat exchanger is stated to be provided with before and after gas bypass A, the gas bypass A and the second air-water heat exchanger
Valve is equipped with pipeline；
The 3rd described air-water heat exchanger is connected with heat exchanger by pipeline with absorption heat pump.
Specifically, this using heat pump depth Mist heat recovering heating system include the first air-water heat exchanger,
Wet type desulphurization device, the second air-water heat exchanger, the 3rd air-water heat exchanger, cooling tower, heat exchanger and absorption
Heat pump, flue gas pass sequentially through the first air-water heat exchanger, wet type desulphurization device, the second air-water heat exchanger, the 3rd
Air-water heat exchanger, is then discharged by cooling tower, and the heating system also includes heat supply network feed pipe, heat supply network backwater
Pipe, heat supply network water supply branch road A, heat supply network water supply branch road B, heat supply network backwater branch road A, heat supply network backwater branch road B, close
Formula circulating water line A, closed cycle water lines B, closed cycle water branch road A and closed cycle water branch road B,
The heat supply network feed pipe is connected by heat supply network water supply branch road A and heat supply network water supply branch road B and the first air-water heat exchanger
Connect, and valve is respectively arranged with heat supply network feed pipe and each water supply branch road, the heat supply network return pipe passes through heat supply network backwater
Branch road A and heat supply network backwater branch road B are connected with the second air-water heat exchanger, and heat supply network return pipe and each backwater branch road
On be respectively arranged with valve, the closed cycle water lines A passes through closed cycle water branch road A and closed cycle water branch
Road B is connected with heat exchanger, and is respectively arranged with valve on closed cycle water lines A and each recirculated water branch road, described
Second air-water heat exchanger and the 3rd air-water heat exchanger come with condensed water collecting device, second air-water
The condensation-water drain of heat exchanger is connected with heat exchanger, and the heat exchanger is connected with condensing water conduit, and between pacify
Equipped with valve B, the condensation-water drain of the 3rd air-water heat exchanger is directly connected with condensing water conduit, described
Absorption heat pump is connected by closed cycle water lines A and closed cycle water lines B and the 3rd air-water heat exchanger
Connect.
Preferably, the second air-water heat exchanger, the 3rd air-water heat exchanger and heat exchanger of the present invention are pipe
Shell heat exchanger, and be made of corrosion-resistant material, corrosion-resistant material is chosen for but is not limited to PFA, FEP
Or PVDF.
Preferably, the second air-water heat exchanger and the 3rd air-water heat exchanger of the present invention come with condensed water
Collection device.
Preferably, the second air-water heat exchanger of the present invention is provided with gas bypass A, the gas bypass A
Be equipped with valve on pipeline before and after the second air-water heat exchanger.
Preferably, flowed between absorption heat pump of the present invention, heat exchanger and the 3rd air-water heat exchanger
For closed cycle water, only circulated between three equipment.
Preferably, heat supply network feed pipe of the present invention by heat supply network water supply branch road A and heat supply network water supply branch road B with
First air-water heat exchanger connects, and is respectively arranged with valve on heat supply network feed pipe and each water supply branch road；The heat supply network returns
Water pipe is connected by heat supply network backwater branch road A and heat supply network backwater branch road B with the second air-water heat exchanger, and heat supply network returns
Valve is respectively arranged with water pipe and each backwater branch road.
Preferably, absorption heat pump of the present invention is used as low-temperature heat source using closed cycle water.
A kind of heating system and its application method using heat pump depth Mist heat recovering, its specifically used side
Method includes following four operating process：
First, when the outlet wet flue gas temperature of wet type desulphurization device is higher than heat supply network return water temperature, valve A is closed, is beaten
Valve opening door N, valve P, valve B, the wet flue gas of wet type desulphurization device outlet are introduced into the second air-water heat exchanger drop
Temperature, enter back into the 3rd air-water heat exchanger cooling, the condensed water of the second air-water heat exchanger after heat exchanger exchanges heat,
Wet type desulphurization device is flowed into by condensing water conduit, control valve E aperture, opens valve C, valve D, enclosed
Recirculated water branch road is opened, and the closed cycle water after the heating of the 3rd air-water heat exchanger is by closed cycle water branch road
Reheating is carried out into heat exchanger, is then converged again with former closed cycle water, is carried out into absorption heat pump
Exchange heat, the flow in closed cycle water branch road can be entered by control valve C, valve D, valve E aperture
Row regulation, control valve H aperture, valve F, valve G are opened, heat supply network backwater branch road is opened, and heat supply network returns
Water is heated through heat supply network backwater branch road into the second air-water heat exchanger, the heat supply network backwater after heating and former heat supply network
Backwater converges, and is heated again subsequently into absorption heat pump, and the flow in heat supply network backwater branch road can pass through
Control valve F, valve G, valve H aperture are adjusted.
2nd, when the outlet wet flue gas temperature of wet type desulphurization device is less than heat supply network return water temperature, valve A is opened, is closed
Valve closing door N, valve P, valve B, the wet flue gas of wet type desulphurization device outlet are directly entered the through gas bypass A
Three air-water heat exchangers cool, and open valve E, close valve C, valve D, and closed cycle water branch road is closed,
Closed cycle water after the heating of the 3rd air-water heat exchanger is directly entered absorption heat pump and exchanged heat, and opens
Valve H, valve F, valve G are closed, heat supply network backwater branch road is closed, and heat supply network backwater is directly entered absorption type heat
Pump is heated.
3rd, in In The Initial Period Of Heating, valve M to be opened, closes valve J, valve K, heat supply network water supply branch road is closed,
Hot net water after absorption heat pump heats directly feeds heat user.
4th, in high and cold phase of heating, control valve M aperture, opening valve J, valve K, heat supply network water supply branch
Road is opened, and the heat supply network after absorption heat pump heats supplies water enters the first air-water heat exchanger through heat supply network water supply branch road
Heated again, the heat supply network after heating, which supplies water to supply water with former heat supply network, to be converged, and then supplies heat user, heat supply network
Flow in water supply branch road can be adjusted by control valve J, valve K, valve M aperture.
Preferably, the first air-water heat exchanger of the present invention flue-gas temperature can be reduced to 105 DEG C and
Hereinafter, wet flue gas temperature can be reduced to 30~40 DEG C by the second air-water heat exchanger and the 3rd air-water heat exchanger.
The present invention compared with prior art, has advantages below and effect：(1) it is reasonable in design, it is simple in construction,
Dependable performance, the cascade utilization principle based on energy, recovered flue gas low temperature exhaust heat is rationally designed, is not only saved
The energy, while greatly reduce the loss of the moisture evaporation in wet type desulphurization device；(2) present invention can be by wet type
The input gas temperature of desulfurizer is reduced to 105 DEG C and less, by the outlet wet flue gas temperature of wet desulphurization device
Degree is reduced to 30~40 DEG C.Therefore, the present invention has been greatly reduced moisture steaming while heat recovery
Hair loss.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, in describing below
Accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that the present invention utilizes the heating system of heat pump depth Mist heat recovering and its system knot of application method
Structure schematic diagram.
Fig. 2 is the structural representation of the second air-water heat exchanger and the 3rd air-water heat exchanger in heating system of the present invention
Figure.
Label declaration：1st, the first air-water heat exchanger；2nd, wet type desulphurization device；3rd, the second air-water heat exchanger；4、
3rd air-water heat exchanger；5th, cooling tower；6th, heat exchanger；7th, absorption heat pump；8th, valve A；9th, cigarette
Gas bypasses A；10th, valve B；11st, condensing water conduit；12nd, closed cycle water branch road A；13rd, enclosed is followed
Ring water branch road B；14th, valve C；15th, valve D；16th, valve E；17th, closed cycle water lines A；18、
Closed cycle water lines B；19th, steam is driven；20th, heat supply network feed pipe；21st, heat supply network return pipe；22nd, it is hot
Net backwater branch road A；23rd, heat supply network backwater branch road B；24th, valve F；25th, valve G；26th, valve H；27、
Heat supply network water supply branch road A；28th, heat supply network water supply branch road B；29th, valve J；30th, valve K；31st, valve M；
32nd, valve N；33rd, valve P；34th, condensed water collecting device；A1, Fluid A Inlet；A2, fluid A
Outlet；B1, Fluid B inlet；B2, fluid B are exported；C1, condensation-water drain.
Embodiment
With reference to embodiment, the present invention is described in further detail, and following examples are the solutions to the present invention
Release and the invention is not limited in following examples.
Embodiment：
Referring to Fig. 1, the heating system of the embodiment includes：First air-water heat exchanger 1, wet type desulphurization device 2,
Second air-water heat exchanger 3, the 3rd air-water heat exchanger 4, cooling tower 5, heat exchanger 6 and absorption heat pump 7,
Flue gas pass sequentially through the first air-water heat exchanger 1, wet type desulphurization device 2, the second air-water heat exchanger 3, the 3rd gas-
Water- to-water heat exchanger 4, then discharged by cooling tower 5, the heating system also includes heat supply network feed pipe 20, heat supply network
Return pipe 21, heat supply network water supply branch road A 27, heat supply network water supply branch road B 28, heat supply network backwater branch road A 22, heat
Net backwater branch road B 23, closed cycle water lines A 17, closed cycle water lines B 18, closed cycle water branch
Road A 12 and closed cycle water branch road B 13, the second air-water heat exchanger 3 are provided with gas bypass A 9,
Valve is equipped with before and after the air-water heat exchangers 3 of gas bypass A 9 and second on pipeline, the heat supply network supplies water
Pipe 20 is connected by heat supply network water supply branch road A 27 and heat supply network water supply branch road B 28 with the first air-water heat exchanger 1,
And valve is respectively arranged with heat supply network feed pipe 20 and each water supply branch road, the heat supply network return pipe 21 is returned by heat supply network
Water branch road A 22 and heat supply network backwater branch road B 23 are connected with the second air-water heat exchanger 3, and heat supply network return pipe 21
And valve is respectively arranged with each backwater branch road, the closed cycle water lines A 17 passes through closed cycle water branch road A 12
It is connected with closed cycle water branch road B 13 with heat exchanger 6, and closed cycle water lines A 17 and each recirculated water
Valve is respectively arranged with branch road, the second air-water heat exchanger 3 and the 3rd air-water heat exchanger 4 come with cold
Condensed water collection device 34, the condensation-water drain of the second air-water heat exchanger 3 is connected with heat exchanger 6, described
Heat exchanger 6 is connected with condensing water conduit 11, and between valve B, the 3rd air-water heat exchanger 4 are installed
Condensation-water drain C1 be directly connected with condensing water conduit 11, the absorption heat pump 7 passes through closed cycle
Water lines A 17 and closed cycle water lines B 18 are connected with the 3rd air-water heat exchanger 4.
When the outlet wet flue gas temperature of wet type desulphurization device 2 is higher than heat supply network return water temperature, valve A 8 is closed, is beaten
Valve opening door N 32, valve P 33, valve B 10, the wet flue gas that wet type desulphurization device 2 exports are introduced into the second gas
- water- to-water heat exchanger 3 cools, and enters back into the 3rd air-water heat exchanger 4 and cools, the condensation of the second air-water heat exchanger 3
Water flows into wet type desulphurization device 2, control valve E's 16 opens after the heat exchange of heat exchanger 6 by condensing water conduit 11
Degree, valve C 14, valve D 15 are opened, closed cycle water branch road is opened, by the 3rd air-water heat exchanger 4
Closed cycle water after heating carries out reheating by closed cycle water branch road into heat exchanger 6, then again with
Former closed cycle water converges, and is exchanged heat into absorption heat pump 7, and the flow in closed cycle water branch road can
It is adjusted with the aperture by control valve C14, valve D 15, valve E 16, control valve H 26
Aperture, open valve F 24, valve G 25, heat supply network backwater branch road is opened, and heat supply network backwater is through heat supply network backwater
Branch road is heated into the second air-water heat exchanger, and the heat supply network backwater after heating converges with former heat supply network backwater, so
Heated again into absorption heat pump afterwards, the flow in heat supply network backwater branch road can by control valve F 24,
Valve G 25, valve H 26 aperture are adjusted.
When the outlet wet flue gas temperature of wet type desulphurization device 2 is less than heat supply network return water temperature, valve A 8 is opened, is closed
Valve closing door N 32, valve P 33, valve B 10, the wet flue gas that wet type desulphurization device 2 exports is through gas bypass A
9, which are directly entered the 3rd air-water heat exchanger 4, cools, and opens valve E 16, closes valve C 14, valve D 15,
Closed cycle water branch road is closed, and the closed cycle water after the heating of the 3rd air-water heat exchanger 4 is directly entered suction
Receipts formula heat pump 7 is exchanged heat, and opens valve H 26, closes valve F 24, valve G 25, heat supply network backwater branch
Road is closed, and heat supply network backwater is directly entered absorption heat pump 7 and heated.
In In The Initial Period Of Heating, valve M 31 is opened, closes valve J 29, valve K 30, heat supply network water supply branch road closes
Close, the hot net water after the heating of absorption heat pump 7 directly feeds heat user.
In the high and cold phase of heating, control valve M 31 aperture opens valve J 29, valve K 30, and heat supply network supplies
Water branch road is opened, and the heat supply network after the heating of absorption heat pump 7 supplies water enters the first air-water through heat supply network water supply branch road
Heat exchanger 1 is heated again, and the heat supply network after heating, which supplies water to supply water with former heat supply network, to be converged, and then supply heat is used
Family, flow in heat supply network water supply branch road can pass through control valve J 29, valve K 30, valve M 31
Aperture is adjusted.
Second air-water heat exchanger 3, the 3rd air-water heat exchanger 4 and heat exchanger 6 are shell-and-tube heat exchanger, and
It is made of corrosion-resistant material, corrosion-resistant material is chosen for but is not limited to PFA, FEP or PVDF.
Flue-gas temperature can be reduced to 105 DEG C and following, the second air-water heat exchanger by the first air-water heat exchanger 1
3 and the 3rd air-water heat exchanger 4 wet flue gas temperature can be reduced to 30~40 DEG C.
Referring to Fig. 2, for the second air-water heat exchanger and the 3rd air-water heat exchanger, fluid A refer to hot net water and
Closed cycle water, fluid B refer to wet flue gas, condensation-water drain C1 and the heat exchanger 6 of the second air-water heat exchanger
Connection, the condensation-water drain C1 of the 3rd air-water heat exchanger are directly connected with condensing water conduit 11.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components,
Named title etc. can be different.What all construction, feature and principles according to described in inventional idea of the present invention were done etc.
Effect or simple change, are included in the protection domain of patent of the present invention.The skill of the technical field of the invention
Art personnel can make various modifications or supplement to described specific embodiment or using similar mode
Substitute, without departing from structure of the invention or surmount scope defined in the claims, all should belong to
In protection scope of the present invention.
Claims (7)
- A kind of 1. heating system using heat pump depth Mist heat recovering, it is characterised in that：Described utilization The heating system of heat pump depth Mist heat recovering includes：First air-water heat exchanger, wet type desulphurization device, second Air-water heat exchanger, the 3rd air-water heat exchanger, cooling tower, heat exchanger and absorption heat pump；Described the first air-water heat exchanger, wet type desulphurization device, the second air-water heat exchanger, the 3rd air-water heat exchanger, Cooling tower passes sequentially through pipeline connection；Described the second air-water heat exchanger, the 3rd air-water heat exchanger are connected with heat exchanger by pipeline respectively；Institute The second air-water heat exchanger is stated to be provided with before and after gas bypass A, the gas bypass A and the second air-water heat exchanger Valve is equipped with pipeline；The 3rd described air-water heat exchanger is connected with heat exchanger by pipeline with absorption heat pump.
- 2. the heating system according to claim 1 using heat pump depth Mist heat recovering, its feature It is：The heating system also includes heat supply network feed pipe, heat supply network return pipe, heat supply network water supply branch road A, heat supply network Water supply branch road B, heat supply network backwater branch road A, heat supply network backwater branch road B, closed cycle water lines A, closed cycle Water lines B, closed cycle water branch road A and closed cycle water branch road B；The heat supply network feed pipe passes through heat supply network water supply branch road A and heat supply network water supply branch road B and the first air-water heat exchanger Connection, and it is respectively arranged with valve on heat supply network feed pipe and each water supply branch road；The heat supply network return pipe passes through heat supply network backwater branch road A and heat supply network backwater branch road B and the second air-water heat exchanger Connection, and it is respectively arranged with valve on heat supply network return pipe and each backwater branch road；The closed cycle water lines A passes through closed cycle water branch road A and closed cycle water branch road B and heat exchange Device connects, and is respectively arranged with valve on closed cycle water lines A and each recirculated water branch road；The condensation-water drain of the second air-water heat exchanger is connected with heat exchanger, the heat exchanger and condensing water conduit Connection, and between valve B is installed；The condensation-water drain of the 3rd air-water heat exchanger is directly connected with condensing water conduit, the absorption heat pump It is connected by closed cycle water lines A and closed cycle water lines B with the 3rd air-water heat exchanger, described closes Low-temperature heat source of the water as absorption heat pump in formula circulating water pipe.
- 3. the heating system according to claim 1 using heat pump depth Mist heat recovering, its feature It is：Second air-water heat exchanger, the 3rd air-water heat exchanger and the heat exchanger are shell-and-tube heat exchanger；Described shell-and-tube heat exchanger is made of corrosion-resistant material, described corrosion-resistant material selected from PFA, FEP, PVDF or other corrosion-resistant materials.
- 4. the heating system according to claim 2 using heat pump depth Mist heat recovering, its feature It is：The second air-water heat exchanger and the 3rd air-water heat exchanger come with condensed water collecting device.
- 5. the heating system according to claim 2 using heat pump depth Mist heat recovering, its feature It is：The heat supply network feed pipe is exchanged heat by heat supply network water supply branch road A and heat supply network water supply branch road B and the first air-water Device connects, and is respectively arranged with valve on heat supply network feed pipe and each water supply branch road；The heat supply network return pipe passes through heat supply network Backwater branch road A and heat supply network backwater branch road B are connected with the second air-water heat exchanger, and heat supply network return pipe and each backwater Valve is respectively arranged with branch road.
- A kind of 6. heat supply method using heat pump depth Mist heat recovering, it is characterised in that：The heat supply method Including four operating processes：First, when the outlet wet flue gas temperature of wet type desulphurization device is higher than heat supply network return water temperature, valve A is closed, Valve N, valve P, valve B are opened, the wet flue gas of wet type desulphurization device outlet is introduced into the heat exchange of the second air-water Device cools, and enters back into the cooling of the 3rd air-water heat exchanger, and the condensed water of the second air-water heat exchanger exchanges heat through heat exchanger Afterwards, wet type desulphurization device is flowed into by condensing water conduit, control valve E aperture, opens valve C, valve D, Closed cycle water branch road is opened, and the closed cycle water after the heating of the 3rd air-water heat exchanger is by closed cycle water Branch road enters heat exchanger and carries out reheating, then converges again with former closed cycle water, into absorption heat pump Exchanged heat, flow in closed cycle water branch road can pass through control valve C, valve D, valve E Aperture is adjusted, control valve H aperture, opens valve F, valve G, and heat supply network backwater branch road is opened, Heat supply network backwater is heated through heat supply network backwater branch road into the second air-water heat exchanger, the heat supply network backwater after heating with Former heat supply network backwater converges, and is heated again subsequently into absorption heat pump, and the flow in heat supply network backwater branch road can It is adjusted with the aperture by control valve F, valve G, valve H；2nd, when the outlet wet flue gas temperature of wet type desulphurization device is less than heat supply network return water temperature, valve A is opened, is closed Valve closing door N, valve P, valve B, the wet flue gas of wet type desulphurization device outlet are directly entered the through gas bypass A Three air-water heat exchangers cool, and open valve E, close valve C, valve D, and closed cycle water branch road is closed, Closed cycle water after the heating of the 3rd air-water heat exchanger is directly entered absorption heat pump and exchanged heat, and opens Valve H, valve F, valve G are closed, heat supply network backwater branch road is closed, and heat supply network backwater is directly entered absorption type heat Pump is heated；3rd, in In The Initial Period Of Heating, valve M to be opened, closes valve J, valve K, heat supply network water supply branch road is closed, Hot net water after absorption heat pump heats directly feeds heat user；4th, in high and cold phase of heating, control valve M aperture, opening valve J, valve K, heat supply network water supply branch Road is opened, and the heat supply network after absorption heat pump heats supplies water enters the first air-water heat exchanger through heat supply network water supply branch road Heated again, the heat supply network after heating, which supplies water to supply water with former heat supply network, to be converged, and then supplies heat user, heat supply network Flow in water supply branch road can be adjusted by control valve J, valve K, valve M aperture.
- 7. the heat supply method according to claim 6 using heat pump depth Mist heat recovering, its feature It is：Flue-gas temperature can be reduced to 105 DEG C and following, the second air-water heat exchanger by the first air-water heat exchanger Wet flue gas temperature can be reduced to 30~40 DEG C with the 3rd air-water heat exchanger.
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| CN109959042A (en) * | 2019-04-01 | 2019-07-02 | 兰州理工大学 | A kind of Combined heating system of fume afterheat driving |
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