CN103776079A - Electric peaking combined heat and power (CHP) waste heat recovery device and operating method thereof - Google Patents
Electric peaking combined heat and power (CHP) waste heat recovery device and operating method thereof Download PDFInfo
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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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
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- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention relates to an electric peaking combined heat and power (CHP) waste heat recovery device and an operating method thereof. The device comprises an inner power plant portion and a heat exchange station portion, wherein the inner power plant portion comprises a heat exchanger, a waste heat recovery electric heat pump, an energy-storing electric heat pump, high/low temperature water storing tanks, a heating network heater, a valve and a circulating water pump; the heat exchange station portion mainly comprises high/low temperature water storing tanks, an electric heat pump, a heat exchanger, a valve and a circulating water pump; as for the operating method of the device, the device can operate in periods of an electrical load trough, an electrical load flat peak and an electrical load peak respectively through combination of different valve switches, the high temperature water storing tank is used for balancing the difference between system heat supply amount and heating load, the low temperature water storing tank is used for stabilizing steam exhaust waste heat recovery amount, thereby, the problem that the electricity generation peaking capacity is limited due to mutual coupling of electricity generation and heat supply in traditional operating modes of 'heat determines electricity' is solved, a CHP unit can participate in power grid load regulation, the power grid regulating capacity can be improved so as to deal with the condition of constantly increasing of electrical load trough-to-peak difference, and the absorptive capacity of a power grid for wind power generation can be improved so as to reduce phenomena of 'fan suspending'.
Description
Technical field
The present invention relates to a kind of heat-exchanger rig and operation method thereof, be specifically related to a kind of heat storage technology that utilizes and reclaim with cogeneration of heat and power and residual heat of electric power plant the power peak regulation cogeneration of heat and power waste-heat recovery device and the operation method thereof that combine, belong to energy source and power technical field.
Background technology
The northern area of China belongs to wind energy enrichment area, and wind-power electricity generation is positive fast-developing in these areas, installed capacity of wind-driven power increase year after year, and installed capacity of wind-driven power accounts for total installation of generating capacity ratio also to be increased year by year.But wind-power electricity generation has anti-part throttle characteristics,, during electrical network power load low ebb at night, wind-powered electricity generation is exerted oneself larger, and in the daytime during electrical network peak of power consumption, wind-powered electricity generation is exerted oneself less.Meanwhile, electric load peak-valley difference also, expanding year by year, makes peak load regulation network difficulties.
At present, the northern area of China urban heating still relies on coal-burning boiler in a large number, has caused the present situation of heat supply high energy consumption, high pollution.Cogeneration of heat and power is a kind of efficient heat-supplying mode, but the steam power plant of China moves in the mode of " electricity determining by heat ", many steam power plants are in order to guarantee heat supply, its generated output adjustable range is greatly limited, the electric load low ebb phase its generating piezometric not under, thereby the space of having seized wind-powered electricity generation generating online, makes wind energy turbine set have to limit its generated output, causes serious " abandoning wind " phenomenon in northern wind-powered electricity generation enrichment area.
Adopt heat pump techniques to reclaim cogeneration units exhaust steam residual heat and can further improve thermoelectricity co-generating heat supplying efficiency, but the mode that cannot change its " electricity determining by heat " is moved; Adopt storage heater to combine with cogeneration of heat and power, utilize storage heater to stabilize heat supply and go out fluctuation, can make cogeneration units move in the mode of " with the fixed heat of electricity ", but in the time that exhaust steam of electric power plant heat recovery technology is combined, cannot guarantee the stable recovery of exhaust steam of electric power plant waste heat.
Summary of the invention
For the problems referred to above, the object of this invention is to provide and utilize heat storage technology to reclaim with cogeneration of heat and power and residual heat of electric power plant the power peak regulation cogeneration of heat and power waste-heat recovery device and the operation method thereof that combine, to realize the electric peak regulating operation of cogeneration units on waste heat recovery basis.
For achieving the above object, the present invention takes following technical scheme: a kind of power peak regulation cogeneration of heat and power waste-heat recovery device, it is characterized in that, and this device is made up of part and heat exchange station part in power plant:
In described power plant, part is mainly made up of heat exchanger (1), waste heat recovery electric heating pump (2), accumulation of energy electric heating pump (3), high temperature water tank (4), Low Temperature Storage water pot (5), heat exchangers for district heating (6), valve (11-19) and water circulating pump (20-23); Wherein, the import of heat exchanger (1) connects a secondary net water return pipeline (1-1), and the outlet of described heat exchanger (1) is the import of valve in parallel (11), valve (12) and water circulating pump (20) respectively; The import of described waste heat recovery electric heating pump (2) connects the outlet of valve (12), and the outlet of described waste heat recovery electric heating pump (2) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the top difference valve in parallel (13) of described high temperature water tank (4) and the import of valve (14), the import of described valve (13) connects the condensator outlet of described accumulation of energy electric heating pump (3), and the outlet of described valve (14) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the bottom difference valve in parallel (15) of described high temperature water tank and the import of water circulating pump (21), the import of described valve (15) connects the outlet of described water circulating pump (20), and the outlet of described water circulating pump (21) connects the condenser inlet of described accumulation of energy electric heating pump (3) through valve (16); The outlet of import/export, the top difference described valve in parallel (11) of described Low Temperature Storage water pot (5) and the import of valve (17), the outlet of described valve (17) connects the evaporator of described accumulation of energy electric heating pump (3); The outlet of import/export, the bottom difference valve in parallel (18) of described Low Temperature Storage water pot (5) and the import of water circulating pump (22), the import of described valve (18) connects the evaporator outlet of described accumulation of energy electric heating pump (3) through water circulating pump (23), the outlet of described water circulating pump (22) is through the import of valve (19) described heat exchanger in parallel (1);
Described heat exchange station part is mainly made up of high temperature water tank (7), Low Temperature Storage water pot (8), electric heating pump (9), heat exchanger (10), valve (24-35) and water circulating pump (36-37), wherein, the outlet of import/export, the top difference valve in parallel (24) of described high temperature water tank (7) and the import of water circulating pump (36), the import of described valve (24) connects the outlet of described heat exchangers for district heating (6) through a secondary net water supply line (1-2), the outlet of described water circulating pump (36) is connected the import of described valve (26) after valve (25) is in parallel with a described secondary net water supply line (1-2), and the outlet of described valve (26) connects a secondary net import of described heat exchanger (10), the outlet of import/export, the bottom difference valve in parallel (27) of described high temperature water tank (7) and the import of valve (28), the import of described valve (27) connects a secondary net outlet of described heat exchanger (10), and the outlet of described valve (28) connects the evaporator of described electric heating pump (9), the outlet of described valve in parallel (27) and the import of valve (28) are also distinguished in the import/export, top of described Low Temperature Storage water pot (8), the outlet of import/export, the bottom difference valve in parallel (29) of described Low Temperature Storage water pot (8) and the import of valve (30), the outlet of described valve (30) connects a described secondary net water return pipeline (1-1), the evaporator outlet of described electric heating pump (9) is through valve (31) import and a described secondary net water return pipeline (1-1) of parallel circulating water pump (37) respectively, and the outlet of described water circulating pump (37) connects the import of valve (29), the import of secondary network water return pipeline (1-3) difference valve in parallel (32) and valve (33), the outlet of described valve (32) connects the secondary network import of described heat exchanger (10), the secondary network outlet of the outlet of described valve (33) and described heat exchanger (10) is the import of valve in parallel (34) and valve (35) respectively, the outlet connecting secondary net water supply line (1-4) of described valve (35), the outlet of described valve (34) connects the condenser inlet of described electric heating pump (9), the condensator outlet of described electric heating pump (9) connects described secondary network water supply line (1-4).
In a preferred embodiment, described heat exchanger (1) adopts condenser or water-water heat exchanger.
In a preferred embodiment, described heat exchanger (10) adopts plate type heat exchanger or absorption heat exchange unit.
A kind of operation method of power peak regulation cogeneration of heat and power waste-heat recovery device described above, it is characterized in that, this operation method, by the combination of different valve switch, regulates this device method of operation, makes it operate in respectively electric load low ebb, the flat peak of electric load and electric load peak period:
1) electric load low-valley interval: part in power plant, valve-off (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), Open valve (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), a secondary net low temperature backwater of confessing through a secondary net water return pipeline (1-1) inflow heat exchanger (1) and waste heat recovery electric heating pump (2) successively, heat exchanger (1) and waste heat recovery electric heating pump (2) reclaim the exhaust steam residual heat of cogeneration units to heat a secondary net low temperature backwater, the hot net water obtaining through heating enters heat exchangers for district heating (6) after being flowed out by waste heat recovery electric heating pump (4), supplied water and flow into a secondary net water supply line (1-2) and confessed by draw gas a net height temperature being heated to obtain after heat supply network design temperature of cogeneration units, simultaneously, water storage in high temperature water tank (4) extracts and flows into the condenser of accumulation of energy electric heating pump (3) out from outlet at bottom through water circulating pump (21), after heating up, heat exchange gets back to high temperature water tank (4) from top inlet, water storage in Low Temperature Storage water pot (5) extrudes and flows into the evaporimeter of accumulation of energy electric heating pump (3) from top exit, after heat exchange cooling, introduce Low Temperature Storage water pot (5) through water circulating pump (23) from bottom inlet,
In heat exchange station part, valve-off (25), valve (26), valve (27), valve (30), valve (32), valve (35) and water circulating pump (36), open all the other valves and water circulating pump (37), a net height temperature of confessing through a secondary net water supply line (1-2) supplies water and flows into high temperature water tank (7) from top inlet, a net height temperature supplies water to be stored in high temperature water tank (7) and by middle temperature water storage wherein and extrudes from outlet at bottom, then after mixing, flow into the evaporimeter of electric heating pump (9) with warm water storage from the extrusion of Low Temperature Storage water pot (8) top exit, after heat exchange cooling, flow out and be divided into two strands, one stock-traders' know-how water circulating pump (37) is introduced Low Temperature Storage water pot (8) from bottom inlet, another plume enters a secondary net water return pipeline (1-1), meanwhile, the flow through condenser of electric heating pump (9) of the secondary network low temperature backwater of confessing through secondary network water supply line (1-3), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user,
2) the electric load flat peak period: part valve-off (16), valve (18), water circulating pump (21) and water circulating pump (23) in power plant, accumulation of energy electric heating pump (3) is shut down, and remainder is identical with the electric load low-valley interval method of operation;
In heat exchange station part, valve-off (24), valve (25), valve (29), valve (30), valve (33), valve (35) and water circulating pump (37), open all the other valves and water circulating pump (36), net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) and evaporimeter of electric heating pump (9) of flowing through successively that supply water, the secondary net low temperature backwater obtaining after heat exchange cooling flows into a secondary net water return pipeline (1-1); Simultaneously, the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3) flow through successively the secondary network side of heat exchanger (10) and the condenser of electric heating pump (9), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user;
3) electric load peak period: part in power plant, valve-off (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), Open valve (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), water circulating pump (22) is extracted the low temperature water storage in Low Temperature Storage water pot (5) out from outlet at bottom, after mixing with a secondary net low temperature backwater, send into heat exchanger (1), heat exchanger (1) reclaims the exhaust steam residual heat of cogeneration units with heating low-temperature mixed water, the hot net water obtaining after heat exchanger (1) heating is divided into two strands, one gets back to Low Temperature Storage water pot (5) from top inlet, another stock-traders' know-how water circulating pump (20) is introduced high temperature water tank (4) from bottom inlet, and the high temperature water storage in high temperature water tank (4) is delivered to heat exchangers for district heating (6) from top exit extrudes, confessed by a cogeneration units net height temperature being heated to obtain after the heat supply network design temperature inflow one secondary net water supply network (1-2) that supplies water that draws gas,
In heat exchange station part, valve-off (24), valve (28), valve (29), valve (31), valve (33), valve (34) and water circulating pump (37), electric heating pump (9) is shut down, open all the other valves and water circulating pump (36), water circulating pump (36) is extracted the high temperature water storage in high temperature water tank (7) out from top exit, with net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) of flowing through after mixing that supplies water, the middle warm water obtaining after heat exchange cooling is divided into two strands, one flows into high temperature water tank (7) from bottom inlet, another strand flows into Low Temperature Storage water pot (8) and low temperature water storage wherein extruded from outlet at bottom from top inlet, the low temperature water storage being forced out enters a secondary net water return pipeline (1-1), meanwhile, the flow through secondary network side of heat exchanger (10) of the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user.
A kind of power peak regulation cogeneration of heat and power waste-heat recovery device, is characterized in that, this device is made up of part and heat exchange station part in power plant:
In described power plant, part is mainly made up of heat exchanger (1), waste heat recovery electric heating pump (2), accumulation of energy electric heating pump (3), high temperature water tank (4), Low Temperature Storage water pot (5), heat exchangers for district heating (6), valve (11-19) and water circulating pump (20-23); Wherein, the import of heat exchanger (1) connects a secondary net water return pipeline (1-1), and the outlet of described heat exchanger (1) is the import of valve in parallel (11), valve (12) and water circulating pump (20) respectively; The import of described waste heat recovery electric heating pump (2) connects the outlet of valve (12), and the outlet of described waste heat recovery electric heating pump (2) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the top difference valve in parallel (13) of described high temperature water tank (4) and the import of valve (14), the import of described valve (13) connects the condensator outlet of described accumulation of energy electric heating pump (3), and the outlet of described valve (14) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the bottom difference valve in parallel (15) of described high temperature water tank and the import of water circulating pump (21), the import of described valve (15) connects the outlet of described water circulating pump (20), and the outlet of described water circulating pump (21) connects the condenser inlet of described accumulation of energy electric heating pump (3) through valve (16); The outlet of import/export, the top difference described valve in parallel (11) of described Low Temperature Storage water pot (5) and the import of valve (17), the outlet of described valve (17) connects the evaporator of described accumulation of energy electric heating pump (3); The outlet of import/export, the bottom difference valve in parallel (18) of described Low Temperature Storage water pot (5) and the import of water circulating pump (22), the import of described valve (18) connects the evaporator outlet of described accumulation of energy electric heating pump (3) through water circulating pump (23), the outlet of described water circulating pump (22) is through the import of valve (19) described heat exchanger in parallel (1);
Described heat exchange station part is mainly made up of Low Temperature Storage water pot (8), electric heating pump (9), heat exchanger (10), valve (26-35) and water circulating pump (37), wherein, the import of described valve (26) connects the outlet of described heat exchangers for district heating (6) through a secondary net water supply line (1-2), and the outlet of described valve (26) connects a secondary net import of described heat exchanger (10), the outlet of import/export, the top difference valve in parallel (27) of described Low Temperature Storage water pot (8) and the import of valve (28), the import of described valve (27) connects a secondary net outlet of described heat exchanger (10), and the outlet of described valve (28) connects the evaporator of described electric heating pump (9), the outlet of import/export, the bottom difference valve in parallel (29) of described Low Temperature Storage water pot (8) and the import of valve (30), the outlet of described valve (30) connects a described secondary net water return pipeline (1-1), the evaporator outlet of described electric heating pump (9) is through valve (31) import and a described secondary net water return pipeline (1-1) of parallel circulating water pump (37) respectively, and the outlet of described water circulating pump (37) connects the import of valve (29), the import of secondary network water return pipeline (1-3) difference valve in parallel (32) and valve (33), the outlet of described valve (32) connects the secondary network import of described heat exchanger (10), the secondary network outlet of the outlet of described valve (33) and described heat exchanger (10) is the import of valve in parallel (34) and valve (35) respectively, the outlet connecting secondary net water supply line (1-4) of described valve (35), the outlet of described valve (34) connects the condenser inlet of described electric heating pump (9), the condensator outlet of described electric heating pump (9) connects described secondary network water supply line (1-4).
In a preferred embodiment, described heat exchanger (1) adopts condenser or water-water heat exchanger.
In a preferred embodiment, described heat exchanger (10) adopts plate type heat exchanger or absorption heat exchange unit.
A kind of operation method of power peak regulation cogeneration of heat and power waste-heat recovery device described above, it is characterized in that, this operation method, by the combination of different valve switch, regulates this device method of operation, makes it operate in respectively electric load low ebb, the flat peak of electric load and electric load peak period:
1) electric load low-valley interval: part in power plant, valve-off (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), Open valve (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), a secondary net low temperature backwater of confessing through a secondary net water return pipeline (1-1) inflow heat exchanger (1) and waste heat recovery electric heating pump (2) successively, heat exchanger (1) and waste heat recovery electric heating pump (2) reclaim the exhaust steam residual heat of cogeneration units to heat a secondary net low temperature backwater, the hot net water obtaining through heating enters heat exchangers for district heating (6) after being flowed out by waste heat recovery electric heating pump (4), supplied water and flow into a secondary net water supply line (1-2) and confessed by draw gas a net height temperature being heated to obtain after heat supply network design temperature of cogeneration units, simultaneously, water storage in high temperature water tank (4) extracts and flows into the condenser of accumulation of energy electric heating pump (3) out from outlet at bottom through water circulating pump (21), after heating up, heat exchange gets back to high temperature water tank (4) from top inlet, water storage in Low Temperature Storage water pot (5) extrudes and flows into the evaporimeter of accumulation of energy electric heating pump (3) from top exit, after heat exchange cooling, introduce Low Temperature Storage water pot (5) through water circulating pump (23) from bottom inlet,
In heat exchange station part, valve-off (30), valve (33), valve (35), open all the other valves and water circulating pump (37), net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) of first flowing through that supplies water, after heat exchange cooling with flow through after the mixing evaporimeter of electric heating pump (9) of warm water storage from the extrusion of Low Temperature Storage water pot (8) top exit, through further flowing out and be divided into two strands after heat exchange cooling, one is recycled water pump (37) and introduces Low Temperature Storage water pot (8) from bottom inlet, another plume enters a secondary net water return pipeline (1-1), simultaneously, first the flow through secondary network side of heat exchanger (10) of the secondary network low temperature backwater of confessing through secondary network water supply line (1-3), flow through after heat exchange the heats up condenser of electric heating pump (9), is sent to hot user through the secondary network high temperature that further heat exchange obtains after the heating up inflow secondary network water supply line (1-4) that supplies water,
2) the electric load flat peak period: part in power plant, valve-off (16), valve (18), water circulating pump (21) and water circulating pump (23), accumulation of energy electric heating pump (3) is shut down, and remainder is identical with the electric load low-valley interval method of operation;
In heat exchange station part, valve-off (29), valve (30), valve (33), valve (35) and water circulating pump (37), open all the other valves, net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) and evaporimeter of electric heating pump (9) of flowing through successively that supply water, the secondary net low temperature backwater obtaining after heat exchange cooling flows into a secondary net water return pipeline (1-1); Simultaneously, the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3) flow through successively the secondary network side of heat exchanger (10) and the condenser of electric heating pump (9), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user;
3) electric load peak period: part in power plant, valve-off (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), Open valve (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), water circulating pump (22) is extracted the low temperature water storage in Low Temperature Storage water pot (5) out from outlet at bottom, after mixing with a secondary net low temperature backwater, send into heat exchanger (1), heat exchanger (1) reclaims the exhaust steam residual heat of cogeneration units with heating low-temperature mixed water, the hot net water obtaining after heat exchanger (1) heating is divided into two strands, one gets back to Low Temperature Storage water pot (5) from top inlet, another stock-traders' know-how water circulating pump (20) is introduced high temperature water tank (4) from bottom inlet, and the high temperature water storage in high temperature water tank (4) is delivered to heat exchangers for district heating (6) from top exit extrudes, confessed by a cogeneration units net height temperature being heated to obtain after the heat supply network design temperature inflow one secondary net water supply network (1-2) that supplies water that draws gas,
In heat exchange station part, valve-off (28), valve (29), valve (31), valve (33), valve (34) and water circulating pump (37), electric heating pump (9) is shut down, open all the other valves, net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) of flowing through that supplies water, after heat exchange cooling, all flow into Low Temperature Storage water pot (8), the low temperature water storage in Low Temperature Storage water pot (8) is extruded and delivers to a secondary net water return pipeline (1-1) from outlet at bottom; Meanwhile, the flow through secondary network side of heat exchanger (10) of the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, waste-heat recovery device of the present invention is made up of jointly part and heat exchange station part in power plant, and in power plant, in part, comprise by accumulation of energy electric heating pump, high temperature water tank, Low Temperature Storage water pot, the exoergic system of holding that valve and water circulating pump form, on electric load peak, during low ebb and flat peak, electric heating pump by part and the intermittent duty of heat exchange station part in power plant regulates power plant's generated output and heat exchange station power load, utilize the difference between high temperature water tank balance sysmte heating load and thermic load, utilize Low Temperature Storage water pot to stablize exhaust steam residual heat yield, thereby significantly improve the power peak regulation ability of steam power plant, solved generating that co-generation unit traditional " electricity determining by heat " operational mode causes and heat supply mutually coupling cause the problem of power generation peak adjusting limited ability, make cogeneration units can regulate its generating online power, participation network load regulates, not only can improve the situation that electrical network regulating power constantly increases with reply electric load peak-valley difference, and can improve the dissolve ability of electrical network to wind-power electricity generation, reduce the generation of " abandoning wind " phenomenon.2, waste-heat recovery device of the present invention can partly or entirely reclaim cogeneration units exhaust steam residual heat, in significantly promoting steam power plant's heat capacity, also significantly improves the efficiency of energy utilization of system.3, the present invention has also realized a secondary net " large the temperature difference " heat supply, enlarges markedly supply backwater temperature difference not changing a secondary net flow simultaneously, promotes original pipe network heat capacity and exceedes 50%, can realize extra long distance simultaneously and carry.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is carried out to detailed describing.But only the providing in order to understand better the present invention of accompanying drawing is provided, they not should be understood to limitation of the present invention.
Fig. 1 is the overall structure schematic diagram of waste-heat recovery device of the present invention;
Fig. 2 is the structural representation of the another kind of heat exchange station part of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, device of the present invention is made up of jointly part and heat exchange station part in power plant.
In power plant, part is mainly made up of condenser/water-water heat exchanger 1, waste heat recovery electric heating pump 2, accumulation of energy electric heating pump 3, high temperature water tank 4, Low Temperature Storage water pot 5, heat exchangers for district heating 6, valve 11-19 and water circulating pump 20-23.Wherein, the import of condenser/water-water heat exchanger 1 connects a secondary net water return pipeline 1-1, and the outlet of condenser/water-water heat exchanger 1 is the import of valve 11 in parallel, valve 12 and water circulating pump 20 respectively.The import of waste heat recovery electric heating pump 2 connects the outlet of valve 12, and the outlet of waste heat recovery electric heating pump 2 connects the import of heat exchangers for district heating 6.The import/export, top of high temperature water tank 4 is the outlet of valve 13 in parallel and the import of valve 14 respectively, and the import of valve 13 connects the condensator outlet of accumulation of energy electric heating pump 3, and the outlet of valve 14 connects the import of heat exchangers for district heating 6.The import/export, bottom of high temperature water tank 4 is the outlet of valve 15 in parallel and the import of water circulating pump 21 respectively, and the import of valve 15 connects the outlet of water circulating pump 20, and the outlet of water circulating pump 21 connects the condenser inlet of accumulation of energy electric heating pump 3 through valve 16.The import/export, top of Low Temperature Storage water pot 5 is the outlet of valve 11 in parallel and the import of valve 17 respectively, and the outlet of valve 17 connects the evaporator of accumulation of energy electric heating pump 3.The import/export, bottom of Low Temperature Storage water pot 5 is the outlet of valve 18 in parallel and the import of water circulating pump 22 respectively, the import of valve 18 connects the evaporator outlet of accumulation of energy electric heating pump 3 through water circulating pump 23, the outlet of water circulating pump 22 is through the import of valve 19 condenser/water-water heat exchanger 1 in parallel.
Heat exchange station part is mainly made up of high temperature water tank 7, Low Temperature Storage water pot 8, electric heating pump 9, plate type heat exchanger 10, valve 24-35 and water circulating pump 36-37.Wherein, the import/export, top of high temperature water tank 7 is the outlet of valve 24 in parallel and the import of water circulating pump 36 respectively, the import of valve 24 connects the outlet of heat exchangers for district heating 6 through a secondary net water supply line 1-2, the outlet of water circulating pump 36 is connected the import of valve 26, a secondary net import of the outlet connecting plate type heat exchanger 10 of valve 26 after a secondary net water supply line 1-2 parallel connection through valve 25.The import/export, bottom of high temperature water tank 7 is the outlet of valve 27 in parallel and the import of valve 28 respectively, a secondary net outlet of the import connecting plate type heat exchanger 10 of valve 27, and the outlet of valve 28 connects the evaporator of electric heating pump 9.The outlet of valve 27 in parallel and the import of valve 28 are also distinguished in the import/export, top of Low Temperature Storage water pot 8, and the import/export, bottom of Low Temperature Storage water pot 8 is the outlet of valve 29 in parallel and the import of valve 30 respectively, and the outlet of valve 30 connects a secondary net water return pipeline 1-1.The evaporator outlet of electric heating pump 9 is through valve 31 import and a secondary net water return pipeline 1-1 of parallel circulating water pump 37 respectively, and the outlet of water circulating pump 37 connects the import of valve 29.The import of secondary network water return pipeline 1-3 difference valve 32 in parallel and valve 33, the secondary network import of the outlet connecting plate type heat exchanger 10 of valve 32, the secondary network outlet of the outlet of valve 33 and plate type heat exchanger 10 is the import of valve 34 in parallel and valve 35 respectively, the outlet connecting secondary net water supply line 1-4 of valve 35, the outlet of valve 34 connects the condenser inlet of electric heating pump 9, the condensator outlet connecting secondary net water supply line 1-4 of electric heating pump 9.
In a preferred embodiment, in heat exchange station part, plate type heat exchanger 10 can be replaced with to absorption heat exchange unit, to reduce the evaporimeter inflow temperature of electric heating pump 9, thus the power consumption of minimizing electric heating pump 9.
Power peak regulation cogeneration of heat and power waste-heat recovery device based on providing in above-described embodiment, the invention allows for a kind of power peak regulation cogeneration of heat and power exhaust heat recovering method, the method is by different valve switch combinations, regulate this device method of operation, make it operate in respectively electric load low ebb, the flat peak of electric load and electric load peak period:
1, electric load low-valley interval: part in power plant, valve-off 11, valve 14, valve 15, valve 19, water circulating pump 20 and water circulating pump 22, Open valve 12, valve 13, valve 16, valve 17, valve 18, water circulating pump 21 and water circulating pump 23, a secondary net low temperature backwater of confessing through a secondary net water return pipeline 1-1 flows into condenser/water-water heat exchanger 1 and waste heat recovery electric heating pump 2 successively, condenser/water-water heat exchanger 1 and waste heat recovery electric heating pump 2 reclaim the exhaust steam residual heat of cogeneration units to heat a secondary net low temperature backwater, after being flowed out by waste heat recovery electric heating pump 4, the hot net water obtaining through heating enters heat exchangers for district heating 6, supplied water and flow into a secondary net water supply line 1-2 and confessed by draw gas a net height temperature being heated to obtain after heat supply network design temperature of cogeneration units, simultaneously, water storage in high temperature water tank 4 extracts and flows into the condenser of accumulation of energy electric heating pump 3 out from outlet at bottom through water circulating pump 21, after heating up, heat exchange gets back to high temperature water tank 4 from top inlet, water storage in Low Temperature Storage water pot 5 extrudes and flows into the evaporimeter of accumulation of energy electric heating pump 3 from top exit, after heat exchange cooling, introduce Low Temperature Storage water pot 5 through water circulating pump 23 from bottom inlet.
In heat exchange station part, valve-off 25, valve 26, valve 27, valve 30, valve 32, valve 35 and water circulating pump 36, open all the other valves and water circulating pump 37, a net height temperature of confessing through a secondary net water supply line 1-2 supplies water and flows into high temperature water tank 7 from top inlet, a net height temperature supplies water to be stored in high temperature water tank 7 and by middle temperature water storage wherein and extrudes from outlet at bottom, then with extrude from Low Temperature Storage water pot 8 top exits flow through after the mixing evaporimeter of electric heating pump 9 of warm water storage, after heat exchange cooling, flow out and be divided into two strands, one stock-traders' know-how water circulating pump 37 is introduced Low Temperature Storage water pot 8 from bottom inlet, another plume enters a secondary net water return pipeline 1-1, simultaneously, the flow through condenser of electric heating pump 9 of the secondary network low temperature backwater of confessing through secondary network water supply line 1-3, the secondary network high temperature obtaining after the middle temperature water storage heat exchange of flowing out with high temperature water tank 7 and Low Temperature Storage water pot 8 heats up supplies water and flows into secondary network water supply line 1-4 and be sent to hot user.
2, the electric load flat peak period: part valve-off 16, valve 18, water circulating pump 21 and water circulating pump 23 in power plant, accumulation of energy electric heating pump 3 is shut down, and remainder is identical with the electric load low-valley interval method of operation;
In heat exchange station part, valve-off 24, valve 25, valve 29, valve 30, valve 33, valve 35 and water circulating pump 37, open all the other valves and water circulating pump 36, net height temperature confessing through a secondary net water supply line 1-2 secondary net side of plate type heat exchanger 10 and evaporimeter of electric heating pump 9 of flowing through successively that supply water, the secondary net low temperature backwater obtaining after heat exchange cooling flows into a secondary net water return pipeline 1-1; The secondary network low temperature backwater of confessing through secondary network water return pipeline 1-3 flow through successively the secondary network side of plate type heat exchanger 10 and the condenser of electric heating pump 9, supply water and flow into secondary network water supply line 1-4 and be sent to hot user with the supply water secondary network high temperature that carries out obtaining after heat exchange of net height temperature, now the start capacity of electric heating pump 9 is less than the start capacity of electric load low-valley interval electric heating pump 9.
3, electric load peak period: part in power plant, valve-off 12, valve 13, valve 16, valve 17, valve 18, water circulating pump 21 and water circulating pump 23, Open valve 11, valve 14, valve 15, valve 19, water circulating pump 20 and water circulating pump 22, water circulating pump 22 is extracted the low temperature water storage in Low Temperature Storage water pot 5 out from outlet at bottom, after mixing with a secondary net low temperature backwater, send into condenser or water-water heat exchanger 1, condenser/water-water heat exchanger 1 reclaims the exhaust steam residual heat of cogeneration units with heating low-temperature mixed water, the unnecessary electric load low ebb of exhaust steam residual heat amount and the flat peak of the electric load period of now reclaiming by condenser/water-water heat exchanger 1, the hot net water obtaining after 1 heating of condenser/water-water heat exchanger is divided into two strands, one gets back to Low Temperature Storage water pot 5 from top inlet, another stock-traders' know-how water circulating pump 20 is introduced high temperature water tank 4 from bottom inlet, and the high temperature water storage in high temperature water tank 4 is delivered to heat exchangers for district heating 6 from top exit extrudes, confessed by a cogeneration units net height temperature being heated to obtain after the heat supply network design temperature inflow one secondary net water supply network 1-2 that supplies water that draws gas.
In heat exchange station part, valve-off 24, valve 28, valve 29, valve 31, valve 33, valve 34 and water circulating pump 37, electric heating pump 9 is shut down, open all the other valves and water circulating pump 36, water circulating pump 36 is extracted the high temperature water storage in high temperature water tank 7 out from top exit, with net height temperature confessing through secondary net water supply line 1-2 secondary net side of plate type heat exchanger 10 of flowing through after mixing that supplies water, the middle warm water obtaining after heat exchange cooling is divided into two strands, one flows into high temperature water tank 7 from bottom inlet, another strand flows into Low Temperature Storage water pot 8 and low temperature water storage wherein extruded from outlet at bottom from top inlet, the low temperature water storage being forced out enters a secondary net water return pipeline 1-1, the flow through secondary network side of plate type heat exchanger 10 of the secondary network low temperature backwater of confessing through secondary network water return pipeline 1-3, the secondary network high temperature obtaining after heating up with the heat exchange of high temperature mixing water supplies water and flows into secondary network water supply line 1-4 and be sent to hot user.
In a preferred embodiment, as shown in Figure 2, heat exchange station part also can not arrange high-temperature heat accumulation tank 7, under this method of operation, although within electric load low ebb, the flat peak of electric load and electric load peak period, heat exchange station part heating load difference, but can utilize building thermal inertia to maintain indoor temperature meets human body comfort demand:
At electric load low-valley interval, heat exchange station part valve-off 30, valve 33, valve 35, open all the other valves and water circulating pump 37, heat exchange station part no longer stores a net height temperature and supplies water, a net height temperature supplies water and directly flows through plate type heat exchanger 10 and mix the rear evaporimeter that flows into electric heating pump 9 with warm water storage from the 8 top exits extrusion of Low Temperature Storage water pot, after heat exchange cooling, flow out and be divided into two strands, one is recycled water pump 37 and introduces Low Temperature Storage water pot 8 from bottom inlet, and another plume enters a secondary net water return pipeline 1-1.Simultaneously, first the flow through secondary network side of plate type heat exchanger 10 of the secondary network low temperature backwater of confessing through secondary network water supply line 1-3, flow through after heat exchange the heats up condenser of electric heating pump 9, flow into secondary network water supply line 1-4 through the secondary network high temperature water supply that further heat exchange obtains after heating up and be sent to hot user, now electric heating pump 9 oeprations at full load.
In the flat peak of the electric load period, heat exchange station part valve-off 29, valve 30, valve 33 and valve 35 and water circulating pump 37, open all the other valves, Low Temperature Storage water pot 8 no longer participates in accumulation of heat or exothermic process, net height temperature confessing through a secondary net water supply line 1-2 secondary net side of plate type heat exchanger 10 and evaporimeter of electric heating pump 9 of flowing through successively that supply water, the secondary net low temperature backwater obtaining after heat exchange cooling flows into a secondary net water return pipeline 1-1.Simultaneously, the secondary network low temperature backwater of confessing through secondary network water return pipeline 1-3 flow through successively the secondary network side of plate type heat exchanger 10 and the condenser of electric heating pump 9, the secondary network high temperature water supply obtaining after heat exchange heats up flows into secondary network water supply line 1-4 and is sent to hot user, but now electric heating pump 9 operations at part load.
In electric load peak period; heat exchange station part valve-off 28, valve 29, valve 31, valve 33, valve 34 and water circulating pump 37; electric heating pump 9 is shut down; open all the other valves; net height temperature confessing through secondary net water supply line 1-2 secondary net side of plate type heat exchanger 10 of flowing through that supplies water; after heat exchange cooling, all flow into Low Temperature Storage water pot 8, the low temperature water storage in Low Temperature Storage water pot 8 is extruded and delivers to a secondary net water return pipeline 1-1 from outlet at bottom.Meanwhile, the flow through secondary network side of plate type heat exchanger 10 of the secondary network low temperature backwater of confessing through secondary network water return pipeline 1-3, the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line 1-4 and be sent to hot user.
The various embodiments described above are only for further describing object of the present invention, technical scheme and beneficial effect; be not limited to the present invention; within the spirit and principles in the present invention all; any modification of making, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (8)
1. a power peak regulation cogeneration of heat and power waste-heat recovery device, is characterized in that, this device is made up of part and heat exchange station part in power plant:
In described power plant, part is mainly made up of heat exchanger (1), waste heat recovery electric heating pump (2), accumulation of energy electric heating pump (3), high temperature water tank (4), Low Temperature Storage water pot (5), heat exchangers for district heating (6), valve (11-19) and water circulating pump (20-23); Wherein, the import of heat exchanger (1) connects a secondary net water return pipeline (1-1), and the outlet of described heat exchanger (1) is the import of valve in parallel (11), valve (12) and water circulating pump (20) respectively; The import of described waste heat recovery electric heating pump (2) connects the outlet of valve (12), and the outlet of described waste heat recovery electric heating pump (2) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the top difference valve in parallel (13) of described high temperature water tank (4) and the import of valve (14), the import of described valve (13) connects the condensator outlet of described accumulation of energy electric heating pump (3), and the outlet of described valve (14) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the bottom difference valve in parallel (15) of described high temperature water tank and the import of water circulating pump (21), the import of described valve (15) connects the outlet of described water circulating pump (20), and the outlet of described water circulating pump (21) connects the condenser inlet of described accumulation of energy electric heating pump (3) through valve (16); The outlet of import/export, the top difference described valve in parallel (11) of described Low Temperature Storage water pot (5) and the import of valve (17), the outlet of described valve (17) connects the evaporator of described accumulation of energy electric heating pump (3); The outlet of import/export, the bottom difference valve in parallel (18) of described Low Temperature Storage water pot (5) and the import of water circulating pump (22), the import of described valve (18) connects the evaporator outlet of described accumulation of energy electric heating pump (3) through water circulating pump (23), the outlet of described water circulating pump (22) is through the import of valve (19) described heat exchanger in parallel (1);
Described heat exchange station part is mainly made up of high temperature water tank (7), Low Temperature Storage water pot (8), electric heating pump (9), heat exchanger (10), valve (24-35) and water circulating pump (36-37), wherein, the outlet of import/export, the top difference valve in parallel (24) of described high temperature water tank (7) and the import of water circulating pump (36), the import of described valve (24) connects the outlet of described heat exchangers for district heating (6) through a secondary net water supply line (1-2), the outlet of described water circulating pump (36) is connected the import of described valve (26) after valve (25) is in parallel with a described secondary net water supply line (1-2), and the outlet of described valve (26) connects a secondary net import of described heat exchanger (10), the outlet of import/export, the bottom difference valve in parallel (27) of described high temperature water tank (7) and the import of valve (28), the import of described valve (27) connects a secondary net outlet of described heat exchanger (10), and the outlet of described valve (28) connects the evaporator of described electric heating pump (9), the outlet of described valve in parallel (27) and the import of valve (28) are also distinguished in the import/export, top of described Low Temperature Storage water pot (8), the outlet of import/export, the bottom difference valve in parallel (29) of described Low Temperature Storage water pot (8) and the import of valve (30), the outlet of described valve (30) connects a described secondary net water return pipeline (1-1), the evaporator outlet of described electric heating pump (9) is through valve (31) import and a described secondary net water return pipeline (1-1) of parallel circulating water pump (37) respectively, and the outlet of described water circulating pump (37) connects the import of valve (29), the import of secondary network water return pipeline (1-3) difference valve in parallel (32) and valve (33), the outlet of described valve (32) connects the secondary network import of described heat exchanger (10), the secondary network outlet of the outlet of described valve (33) and described heat exchanger (10) is the import of valve in parallel (34) and valve (35) respectively, the outlet connecting secondary net water supply line (1-4) of described valve (35), the outlet of described valve (34) connects the condenser inlet of described electric heating pump (9), the condensator outlet of described electric heating pump (9) connects described secondary network water supply line (1-4).
2. a kind of power peak regulation cogeneration of heat and power waste-heat recovery device as claimed in claim 1, is characterized in that, described heat exchanger (1) adopts condenser or water-water heat exchanger.
3. a kind of power peak regulation cogeneration of heat and power waste-heat recovery device as claimed in claim 1 or 2, is characterized in that, described heat exchanger (10) adopts plate type heat exchanger or absorption heat exchange unit.
4. a power peak regulation cogeneration of heat and power waste-heat recovery device, is characterized in that, this device is made up of part and heat exchange station part in power plant:
In described power plant, part is mainly made up of heat exchanger (1), waste heat recovery electric heating pump (2), accumulation of energy electric heating pump (3), high temperature water tank (4), Low Temperature Storage water pot (5), heat exchangers for district heating (6), valve (11-19) and water circulating pump (20-23); Wherein, the import of heat exchanger (1) connects a secondary net water return pipeline (1-1), and the outlet of described heat exchanger (1) is the import of valve in parallel (11), valve (12) and water circulating pump (20) respectively; The import of described waste heat recovery electric heating pump (2) connects the outlet of valve (12), and the outlet of described waste heat recovery electric heating pump (2) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the top difference valve in parallel (13) of described high temperature water tank (4) and the import of valve (14), the import of described valve (13) connects the condensator outlet of described accumulation of energy electric heating pump (3), and the outlet of described valve (14) connects the import of described heat exchangers for district heating (6); The outlet of import/export, the bottom difference valve in parallel (15) of described high temperature water tank and the import of water circulating pump (21), the import of described valve (15) connects the outlet of described water circulating pump (20), and the outlet of described water circulating pump (21) connects the condenser inlet of described accumulation of energy electric heating pump (3) through valve (16); The outlet of import/export, the top difference described valve in parallel (11) of described Low Temperature Storage water pot (5) and the import of valve (17), the outlet of described valve (17) connects the evaporator of described accumulation of energy electric heating pump (3); The outlet of import/export, the bottom difference valve in parallel (18) of described Low Temperature Storage water pot (5) and the import of water circulating pump (22), the import of described valve (18) connects the evaporator outlet of described accumulation of energy electric heating pump (3) through water circulating pump (23), the outlet of described water circulating pump (22) is through the import of valve (19) described heat exchanger in parallel (1);
Described heat exchange station part is mainly made up of Low Temperature Storage water pot (8), electric heating pump (9), heat exchanger (10), valve (26-35) and water circulating pump (37), wherein, the import of described valve (26) connects the outlet of described heat exchangers for district heating (6) through a secondary net water supply line (1-2), and the outlet of described valve (26) connects a secondary net import of described heat exchanger (10), the outlet of import/export, the top difference valve in parallel (27) of described Low Temperature Storage water pot (8) and the import of valve (28), the import of described valve (27) connects a secondary net outlet of described heat exchanger (10), and the outlet of described valve (28) connects the evaporator of described electric heating pump (9), the outlet of import/export, the bottom difference valve in parallel (29) of described Low Temperature Storage water pot (8) and the import of valve (30), the outlet of described valve (30) connects a described secondary net water return pipeline (1-1), the evaporator outlet of described electric heating pump (9) is through valve (31) import and a described secondary net water return pipeline (1-1) of parallel circulating water pump (37) respectively, and the outlet of described water circulating pump (37) connects the import of valve (29), the import of secondary network water return pipeline (1-3) difference valve in parallel (32) and valve (33), the outlet of described valve (32) connects the secondary network import of described heat exchanger (10), the secondary network outlet of the outlet of described valve (33) and described heat exchanger (10) is the import of valve in parallel (34) and valve (35) respectively, the outlet connecting secondary net water supply line (1-4) of described valve (35), the outlet of described valve (34) connects the condenser inlet of described electric heating pump (9), the condensator outlet of described electric heating pump (9) connects described secondary network water supply line (1-4).
5. a kind of power peak regulation cogeneration of heat and power waste-heat recovery device as claimed in claim 4, is characterized in that, described heat exchanger (1) adopts condenser or water-water heat exchanger.
6. a kind of power peak regulation cogeneration of heat and power waste-heat recovery device as described in claim 4 or 5, is characterized in that, described heat exchanger (10) adopts plate type heat exchanger or absorption heat exchange unit.
7. the operation method of a power peak regulation cogeneration of heat and power waste-heat recovery device as described in claim 1 to 3 any one, it is characterized in that, this operation method is by different valve switch combinations, regulate this device method of operation, make it operate in respectively electric load low ebb, the flat peak of electric load and electric load peak period:
1) electric load low-valley interval: part in power plant, valve-off (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), Open valve (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), a secondary net low temperature backwater of confessing through a secondary net water return pipeline (1-1) inflow heat exchanger (1) and waste heat recovery electric heating pump (2) successively, heat exchanger (1) and waste heat recovery electric heating pump (2) reclaim the exhaust steam residual heat of cogeneration units to heat a secondary net low temperature backwater, the hot net water obtaining through heating enters heat exchangers for district heating (6) after being flowed out by waste heat recovery electric heating pump (4), supplied water and flow into a secondary net water supply line (1-2) and confessed by draw gas a net height temperature being heated to obtain after heat supply network design temperature of cogeneration units, simultaneously, water storage in high temperature water tank (4) extracts and flows into the condenser of accumulation of energy electric heating pump (3) out from outlet at bottom through water circulating pump (21), after heating up, heat exchange gets back to high temperature water tank (4) from top inlet, water storage in Low Temperature Storage water pot (5) extrudes and flows into the evaporimeter of accumulation of energy electric heating pump (3) from top exit, after heat exchange cooling, introduce Low Temperature Storage water pot (5) through water circulating pump (23) from bottom inlet,
In heat exchange station part, valve-off (25), valve (26), valve (27), valve (30), valve (32), valve (35) and water circulating pump (36), open all the other valves and water circulating pump (37), a net height temperature of confessing through a secondary net water supply line (1-2) supplies water and flows into high temperature water tank (7) from top inlet, a net height temperature supplies water to be stored in high temperature water tank (7) and by middle temperature water storage wherein and extrudes from outlet at bottom, then after mixing, flow into the evaporimeter of electric heating pump (9) with warm water storage from the extrusion of Low Temperature Storage water pot (8) top exit, after heat exchange cooling, flow out and be divided into two strands, one stock-traders' know-how water circulating pump (37) is introduced Low Temperature Storage water pot (8) from bottom inlet, another plume enters a secondary net water return pipeline (1-1), meanwhile, the flow through condenser of electric heating pump (9) of the secondary network low temperature backwater of confessing through secondary network water supply line (1-3), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user,
2) the electric load flat peak period: part valve-off (16), valve (18), water circulating pump (21) and water circulating pump (23) in power plant, accumulation of energy electric heating pump (3) is shut down, and remainder is identical with the electric load low-valley interval method of operation;
In heat exchange station part, valve-off (24), valve (25), valve (29), valve (30), valve (33), valve (35) and water circulating pump (37), open all the other valves and water circulating pump (36), net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) and evaporimeter of electric heating pump (9) of flowing through successively that supply water, the secondary net low temperature backwater obtaining after heat exchange cooling flows into a secondary net water return pipeline (1-1); Simultaneously, the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3) flow through successively the secondary network side of heat exchanger (10) and the condenser of electric heating pump (9), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user;
3) electric load peak period: part in power plant, valve-off (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), Open valve (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), water circulating pump (22) is extracted the low temperature water storage in Low Temperature Storage water pot (5) out from outlet at bottom, after mixing with a secondary net low temperature backwater, send into heat exchanger (1), heat exchanger (1) reclaims the exhaust steam residual heat of cogeneration units with heating low-temperature mixed water, the hot net water obtaining after heat exchanger (1) heating is divided into two strands, one gets back to Low Temperature Storage water pot (5) from top inlet, another stock-traders' know-how water circulating pump (20) is introduced high temperature water tank (4) from bottom inlet, and the high temperature water storage in high temperature water tank (4) is delivered to heat exchangers for district heating (6) from top exit extrudes, confessed by a cogeneration units net height temperature being heated to obtain after the heat supply network design temperature inflow one secondary net water supply network (1-2) that supplies water that draws gas,
In heat exchange station part, valve-off (24), valve (28), valve (29), valve (31), valve (33), valve (34) and water circulating pump (37), electric heating pump (9) is shut down, open all the other valves and water circulating pump (36), water circulating pump (36) is extracted the high temperature water storage in high temperature water tank (7) out from top exit, with net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) of flowing through after mixing that supplies water, the middle warm water obtaining after heat exchange cooling is divided into two strands, one flows into high temperature water tank (7) from bottom inlet, another strand flows into Low Temperature Storage water pot (8) and low temperature water storage wherein extruded from outlet at bottom from top inlet, the low temperature water storage being forced out enters a secondary net water return pipeline (1-1), meanwhile, the flow through secondary network side of heat exchanger (10) of the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user.
8. the operation method of a power peak regulation cogeneration of heat and power waste-heat recovery device as described in claim 4 to 6 any one, it is characterized in that, this operation method is by different valve switch combinations, regulate this device method of operation, make it operate in respectively electric load low ebb, the flat peak of electric load and electric load peak period:
1) electric load low-valley interval: part in power plant, valve-off (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), Open valve (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), a secondary net low temperature backwater of confessing through a secondary net water return pipeline (1-1) inflow heat exchanger (1) and waste heat recovery electric heating pump (2) successively, heat exchanger (1) and waste heat recovery electric heating pump (2) reclaim the exhaust steam residual heat of cogeneration units to heat a secondary net low temperature backwater, the hot net water obtaining through heating enters heat exchangers for district heating (6) after being flowed out by waste heat recovery electric heating pump (4), supplied water and flow into a secondary net water supply line (1-2) and confessed by draw gas a net height temperature being heated to obtain after heat supply network design temperature of cogeneration units, simultaneously, water storage in high temperature water tank (4) extracts and flows into the condenser of accumulation of energy electric heating pump (3) out from outlet at bottom through water circulating pump (21), after heating up, heat exchange gets back to high temperature water tank (4) from top inlet, water storage in Low Temperature Storage water pot (5) extrudes and flows into the evaporimeter of accumulation of energy electric heating pump (3) from top exit, after heat exchange cooling, introduce Low Temperature Storage water pot (5) through water circulating pump (23) from bottom inlet,
In heat exchange station part, valve-off (30), valve (33), valve (35), open all the other valves and water circulating pump (37), net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) of first flowing through that supplies water, after heat exchange cooling with flow through after the mixing evaporimeter of electric heating pump (9) of warm water storage from the extrusion of Low Temperature Storage water pot (8) top exit, through further flowing out and be divided into two strands after heat exchange cooling, one is recycled water pump (37) and introduces Low Temperature Storage water pot (8) from bottom inlet, another plume enters a secondary net water return pipeline (1-1), simultaneously, first the flow through secondary network side of heat exchanger (10) of the secondary network low temperature backwater of confessing through secondary network water supply line (1-3), flow through after heat exchange the heats up condenser of electric heating pump (9), is sent to hot user through the secondary network high temperature that further heat exchange obtains after the heating up inflow secondary network water supply line (1-4) that supplies water,
2) the electric load flat peak period: part in power plant, valve-off (16), valve (18), water circulating pump (21) and water circulating pump (23), accumulation of energy electric heating pump (3) is shut down, and remainder is identical with the electric load low-valley interval method of operation;
In heat exchange station part, valve-off (29), valve (30), valve (33), valve (35) and water circulating pump (37), open all the other valves, net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) and evaporimeter of electric heating pump (9) of flowing through successively that supply water, the secondary net low temperature backwater obtaining after heat exchange cooling flows into a secondary net water return pipeline (1-1); Simultaneously, the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3) flow through successively the secondary network side of heat exchanger (10) and the condenser of electric heating pump (9), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user;
3) electric load peak period: part in power plant, valve-off (12), valve (13), valve (16), valve (17), valve (18), water circulating pump (21) and water circulating pump (23), Open valve (11), valve (14), valve (15), valve (19), water circulating pump (20) and water circulating pump (22), water circulating pump (22) is extracted the low temperature water storage in Low Temperature Storage water pot (5) out from outlet at bottom, after mixing with a secondary net low temperature backwater, send into heat exchanger (1), heat exchanger (1) reclaims the exhaust steam residual heat of cogeneration units with heating low-temperature mixed water, the hot net water obtaining after heat exchanger (1) heating is divided into two strands, one gets back to Low Temperature Storage water pot (5) from top inlet, another stock-traders' know-how water circulating pump (20) is introduced high temperature water tank (4) from bottom inlet, and the high temperature water storage in high temperature water tank (4) is delivered to heat exchangers for district heating (6) from top exit extrudes, confessed by a cogeneration units net height temperature being heated to obtain after the heat supply network design temperature inflow one secondary net water supply network (1-2) that supplies water that draws gas,
In heat exchange station part, valve-off (28), valve (29), valve (31), valve (33), valve (34) and water circulating pump (37), electric heating pump (9) is shut down, open all the other valves, net height temperature confessing through a secondary net water supply line (1-2) secondary net side of heat exchanger (10) of flowing through that supplies water, after heat exchange cooling, all flow into Low Temperature Storage water pot (8), the low temperature water storage in Low Temperature Storage water pot (8) is extruded and delivers to a secondary net water return pipeline (1-1) from outlet at bottom; Meanwhile, the flow through secondary network side of heat exchanger (10) of the secondary network low temperature backwater of confessing through secondary network water return pipeline (1-3), the secondary network high temperature obtaining after heat exchange heats up supplies water and flows into secondary network water supply line (1-4) and be sent to hot user.
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