CN106704115A

CN106704115A - Wind power cooling antifreezing system based on seawater source heat pump for wind power farm

Info

Publication number: CN106704115A
Application number: CN201710005347.9A
Authority: CN
Inventors: 王玲
Original assignee: State Grid Liaoning Electric Power Co Ltd
Current assignee: State Grid Liaoning Electric Power Co Ltd; Benxi Power Supply Co of Liaoning Electric Power Co Ltd
Priority date: 2017-01-04
Filing date: 2017-01-04
Publication date: 2017-05-24
Anticipated expiration: 2037-01-04
Also published as: CN106704115B

Abstract

The invention relates to a wind power cooling antifreezing system based on a seawater source heat pump for a wind power farm and belongs to the field of power plants. The technical key point is that the system comprises an expansion water tank, a wind power cooling system and a heat exchange system. The heat exchange system comprises a closed channel which is provided with an inclined plate type upper cover, an insulating layer is paved on the outer surface of the upper cover, a plurality of condensation water drainage channels are formed in the upper cover along the inclining direction of the upper cover, the condensation water drainage channels are gathered at a water guiding tank at the inclined bottom edge of the upper cover, sealing doors are mounted on two end portions of the closed drainage channel, the water guiding tank extends from the sealing doors, a water inlet is formed in a sealing door on one side, a filter screen is arranged, and the inclining angle of the inclined plate type upper cover is 5-10 degrees.

Description

Wind-powered electricity generation based on the sea water source heat pump cooling winterization system of wind power plant

Technical field

The invention belongs to power plant field, it is related to a kind of cooling winterization system of the wind-powered electricity generation based on sea water source heat pump of wind power plant.

Background technology

Power plant steam needs to cool down water cooling, and general power plant cooling water comes from cooling tower, and the power plant in coastal waters can be straight Introducing seawater is connect to cool down to reach the purpose gathered materials on the spot steam as cooling water.Seawater completes steam condensation and can improve itself When heat, such as Dalian winter, the temperature of the seawater of completion condensation can reach 18 degree or so, and general power plant can be by this part seawater It is back in the sea, this partial heat is not utilized.

If can be antifreeze using this part seawater heat during winter, antifreeze cost, the wind-powered electricity generation cooling system of wind park can be reduced System, cooling working medium can cause system icing under the temperature conditions of polar region, and prior art uses expansion tank and its heating dress Put to solve the problem, the Chinese invention patent application of application number 2007101713928 discloses the antifreeze of wind power cooling system Structure, however, simple can increase energy resource consumption using heater, improves antifreeze cost.If energy and seawater to make heat exchange, use sea Hydro-thermal amount is antifreeze, will greatly reduce energy resource consumption.But seawater exchanges heat with cooling water, due to mixing silt, algae etc. in seawater Easy-adhesion impurity, prolonged heat exchange can cause heat exchange efficiency extremely reduction, additionally, in heat transfer process, the part water of generation steams Gas, is a kind of self-purification water, if be used, it is possible to achieve the purification to seawater.

The content of the invention

In order to solve the above problems, the cooling of the wind-powered electricity generation based on sea water source heat pump the invention provides a kind of wind power plant is antifreeze System, technical scheme is：Including expansion tank, wind power cooling system, heat-exchange system, the expansion tank connects with cooling system Connect, the expansion tank is double layer hollow formula expansion tank, the PE intermediaries water that expansion tank hollow layer is communicated in heat-exchange system is returned Flow tube；

Described cooling system include water pump, Hydraulic Station, generator, gear-box, frequency converter, heat exchanger, thermosistor and Cooler, one end of expansion tank is connected with the water pump of cooling system, and the other end connects the second thermosistor, described Hydraulic Station, Generator, gear-box, frequency converter one end are connected with water pump and pressure gauge, and the other end is respectively connected with a heat exchanger, respectively First heat exchanger, second heat exchanger, the 3rd heat exchanger, the 4th heat exchanger, wherein, Hydraulic Station is through first heat exchanger It is connected with the other end of described second heat exchanger by one first thermosistor after output, also by one the 3rd thermosistor and institute The other end of the 4th heat exchanger stated is connected, and described cooler passes through one second thermosistor and the 3rd described heat exchanger The other end be connected；

The heat-exchange system includes closed irrigation canals and ditches, and its outer surface laying with lid in tilt flat plate type, the upper lid is protected Warm layer, along the incline direction of the upper lid, opens up some condensate drainage channels thereon, and each drainage channel is converged Being placed in the guiding gutter on the inclination base covered on described, hermatic door is installed at the both ends of the closed irrigation canals and ditches, the guiding gutter by Hermatic door is stretched out, and water inlet is arranged on the hermatic door of side, and with screen pack, the angle of inclination covered in the tilt flat plate type It is 5~10 degree；

The horizontal lower cover of the irrigation canals and ditches is laid between a ZuUXing PE intermediaries water return duct, each PE intermediaries water return duct of the group Uniformly arranged in Semi surrounding type, and it is closely knit in gap filling sand, and each PE intermediaries water return duct is provided with circulating pump, and and intermediary Water storage tank is connected, and pacifies cartridge control valve on connecting pipe, and each PE intermediaries water return duct connects with the hollow layer of expansion tank It is logical；

Exchanged heat with the turbine condenser of thermal power plant as the seawater of cooling water, the seawater after heat exchange is entered by side hermatic door Enter, exchanged heat with the intermediary's water in PE intermediaries water return ducts in the closed irrigation canals and ditches；Covered on the upper strata of PE intermediaries water return duct One layer of water-permeable brick, the water-permeable brick inclines laying, and is digging out row's ditch positioned at the vicinity of the water-permeable brick for inclining lowest part, makes to be located at The water-permeable brick for inclining lowest part is connected with row's ditch；The upper lid is consistent with the laying incline direction of water-permeable brick, the water-permeable brick Angle of inclination is 7~12 degree；

Corrosion-resistant net is laid on the upper strata of water-permeable brick, and the corrosion-resistant net is single layer of wires net, and twine is in transverse and longitudinal square crossing Uniform arrangement；Drive roll and driven voller are arranged on the support frame of left and right sides hermatic door, the first driving chain respectively with it is described The front end of drive roll is connected with the front end of the driven voller, the second driving chain respectively with the rear end of the drive roll and it is described from The rear end of dynamic roller is connected, so that the drive roll links with the driven voller, the corrosion-resistant net is covered in the first driving chain Or second on driving chain；One or two in the support frame of the both sides sealed door is provided with outer net perching knife；

Equipped with scraper plate, Pai Gouzhong is equipped with the track advanced for scraper plate to row's ditch；

Auxiliary heater is also equipped with the expansion tank and in hollow layer.

Further, the hollow layer of the expansion tank has water supplement port.

Beneficial effect：The present invention uses the hollow layer in the seawater and wind power plant expansion tank after being exchanged heat with power plant steam Intermediary's water heat exchange, is reclaimed with the heat to the seawater with power plant's used heat, also, improves the heat exchange effect of seawater to make heat exchange Rate, extends the use time of consumptive material, the condensation water recovery and use that will also be produced by steam, to form the one of heat exchange, purification Formula system.

Brief description of the drawings

Fig. 1 is the structural representation of system of the present invention；

Fig. 2 is another structural representation of system of the present invention；

Fig. 3 is corrosion-resistant net drive mechanism schematic diagram；

Fig. 4 is the structured flowchart of the system；

Fig. 5 is the schematic diagram of method described in embodiment.

1. covered on, 2. guiding gutter, 3.PE fresh water return ducts, 4. water-permeable brick, 5. corrosion-resistant net, 6. drive roll, 7. driven voller, 8. the first driving chain, 9. corrosion-resistant net, 10. motor, 11. corrosion-resistant nets, the driving chains of 12.. second.

Specific embodiment

Present embodiment provides a kind of embodiment, so that the present invention is further described.

In one embodiment, the cooling winterization system of the wind-powered electricity generation based on sea water source heat pump of wind power plant, including expansion tank, Wind power cooling system, heat-exchange system, the expansion tank are connected with cooling system, and the expansion tank expands for double layer hollow formula Water tank, expansion tank hollow layer is communicated in the PE intermediaries water return duct of heat-exchange system；

The heat-exchange system includes closed irrigation canals and ditches, and it has lid 1 in tilt flat plate type, the outer surface laying of the upper lid 1 Heat-insulation layer, along the incline direction of the upper lid 1, opens up some condensate drainage channels thereon, each drainage channel The guiding gutter 2 on the inclination base for being placed in the upper lid 1 is converged in, hermatic door is installed at the both ends of the closed irrigation canals and ditches, described to lead Tank 2 is stretched out by hermatic door.In heat transfer process, have a large amount of vapor and be condensed into condensate in upper lid 1, be typically considered one Recyclable clean water is planted, is that this part water is recycled, upper lid 1 is set to lid 1 in plate inclination, and open up Some condensate drainage channels, will condense in the condensate of upper lid 1 by Action of Gravity Field drainage, and converge in the inclination of lid 1 The guiding gutter 2 on base, to cause that this partial coagulation water is collected.And lay heat-insulation layer, be in order to ensure that low temperature season does not freeze, During such as winter, the temperature of upper lid 1 is too low, and the problem for condensing water freezing may be caused to occur.The inclination covered in the tilt flat plate type Angle is 5~10 degree, preferably 8 degree, because the upper purpose that is obliquely installed of lid is in order to collect condensate, if inclination angle is spent Small, then condensate is difficult flowing, it is impossible to reach guiding gutter so that condensate cannot be collected by drainage；And wide-angle is crossed, cause again Condense water flow velocity to be difficult to control to, produce overflow phenomena, and excessive angle, also waste substantial amounts of insulation layer material, the angle Scope is to change the preferred range that experiment finds by substantial amounts of angle, and condensate flow velocity under the scope is ideal, can Adaptation gathering speed, and overflow phenomena will not occur, under the angle, the use for being incubated layer material will not cause obvious cost Increase.In this embodiment, the evaporation and condensation water to seawater is reclaimed, and is a kind of very effective hand for obtaining clean water Section, this recovery occurs in heat transfer process, further promotes the water of recovery, such as, the flow of processed seawater is 10000 ton hours, according to the evaporation capacity of a ten thousandth, evaporation capacity hourly can reach 1 ton, the clean water collected for a day 24 tons or so can be reached, the water of collection is considerable.

In the system, the water inlet for flowing into the seawater after exchanging heat for the first time is arranged on the hermatic door of side, and with filtering Net, to filter out the thing of the more big parts such as the rubbish that the seawater after heat exchange for the first time falls into during discharge flow.It is described It is in Semi surrounding type between the ZuUXing PE intermediaries water return duct 3 of horizontal lower cover laying one of irrigation canals and ditches, each PE intermediaries water return duct 3 of the group Uniform arrangement, and closely knit in gap filling sand, each PE intermediaries water return duct 3 is provided with circulating pump, and with intermediary's water storage tank Connection, and pacify cartridge control valve on connecting pipe；The intermediary's water circulated in U-shaped PE intermediaries water return duct 3, storage tank Water can be used the intermediary's water in the water supplement PE intermediaries water return duct 3 in storage tank directly from running water, when needed.

Exchanged heat with the turbine condenser of thermal power plant as the seawater of cooling water, the seawater after heat exchange is entered by side hermatic door Enter, in the closed irrigation canals and ditches with PE intermediaries water return duct 3 in intermediary's water heat exchange, PE intermediaries water is communicated in expansion by water tank The hollow layer of case, to cause that the intermediary's water extraction after heat exchange rises the temperature of the cooling working medium in expansion tank.

And with the closely knit U-shaped PE intermediaries water return duct 3 of sand, on the one hand play fixing pipe, and on the other hand, the heat of sand Transmission is preferable, and suitable heat exchange is used, if not using sand, once the impurity Long-Term Sorption being easily bonded is on pipe, and will pole Big influence heat exchanger effectiveness.

Seawater after exchanging heat for the first time is entered by side hermatic door, with PE intermediaries water return duct 3 in the closed irrigation canals and ditches In the heat exchange of intermediary water；One layer of water-permeable brick 4 is covered on the upper strata of PE intermediaries water return duct 3, the water-permeable brick 4 inclines laying, and Row's ditch is being dug out positioned at the vicinity of the water-permeable brick 4 for inclining lowest part, the water-permeable brick 4 for being located at inclination lowest part is connected with row's ditch, Equipped with scraper plate, Pai Gouzhong is equipped with the track advanced for scraper plate to row's ditch；The upper lid 1 inclines with the laying of water-permeable brick 4 Tilted direction is consistent；Purpose using water-permeable brick 4 is that one layer of filtering is formed between U-shaped PE intermediaries water return duct 3 and water inlet, is made Water can be exchanged heat and impurity is filtered by water-permeable brick 4 by water-permeable brick 4, and in order to avoid water-permeable brick 4 is bonded by impurity, inclined Tiltedly set, to cause that impurity receives Action of Gravity Field, by the row's of the sliding down into ditch of water-permeable brick 4, as long as ditch is arranged in periodic cleaning, and make Drive scraper plate most to arrange ditch with track to be cleared up, it is possible to use the cycle of controller control cleaning and intensity, cleaning effect are preferable, Extend the use time and clearance time of water-permeable brick 4.The laying angle of inclination of the water-permeable brick is 7~12 degree, preferably 10 Degree, in this scenario, it may be preferred to attach permeable slip layer in water-permeable brick upper surface, Pai Gou is fallen into cause impurity to be more easy to slide, Water-permeable brick incline laying purpose be in order that impurity slid down onto row's ditch by gravity, due to seawater introduce power plant when, Filtered once, thus, the obvious seawater relatively in the sea of impurity is few in discharge process, in this case, without causing Water-permeable brick angle of inclination is excessive；Water-permeable brick angle of inclination is big, and impurity easily falls, but but also causes that seawater is easily attached in row's ditch Nearly accumulation, the problem for causing heat exchange uneven, and angle too small, impurity is difficult to fall into Pai Gou, by the discovery of a large amount of inclined experimentals, Above range is ideal, and within this range, impurity is easily slipped to the seawater product near Pai Gouzhong, and the row's of not resulting in ditch It is poly-, and upper lid 1 is consistent with the laying incline direction of water-permeable brick 4, in order to when there is overflow in the condensate of upper lid, due to The condensing water temperature for falling can influence heat exchange uniform with ocean temperature difference, thus, above-mentioned restriction is made, even if there is overflow, Because incline direction is consistent, overflow water typically can be near the row of flowing to ditch, away from water-permeable brick, the influence of reduction heat exchanging.In this reality Apply in example, the amount of the preferably closed irrigation canals and ditches of seawater introducing is maintained just not to be had water-permeable brick or do not had water-permeable brick, and just do not had second Driving chain, now heat transfer effect is preferable.

However, it has been found in practice that, only filtered using water-permeable brick 4, found in repeatedly practice, water-permeable brick 4 makes It is still undesirable with the time, in order to increase the use time of water-permeable brick 4, also for filter effect is improved, increase heat exchange efficiency, saturating Corrosion-resistant net 5 is laid on the upper strata of water brick 4, and the corrosion-resistant net 5 is single layer of wires net, it is of course also possible to be multilayer steel wire, net Silk is uniformly arranged in transverse and longitudinal square crossing；Drive roll 6 and driven voller 7 are arranged on the support frame of left and right sides hermatic door, and first Driving chain 8 is connected with the front end of the drive roll 6 and the front end of the driven voller 7 respectively, the second driving chain 12 respectively with The rear end of the drive roll 6 is connected with the rear end of the driven voller 7, so that the drive roll 6 links with the driven voller 7, institute Corrosion-resistant net 5 is stated to be covered on the first driving chain 8 or the second driving chain 12；With this so that the circulation transmission of corrosion-resistant net 5, Impurity is allowed to be bonded on steel wire, and in order to increase the filter effect and use time of steel wire, in both sides sealing door One or two in support frame is provided with outer net perching knife, to root out the impurity of outer online bonding, the perching knife can coordinate with Support stretches out, and can strike off outer net sticky object, has splicing groove under it, catches adhesive, with periodic cleaning, thus, the biography The corrosion-resistant net of motivation structure can stretch out hermatic door, i.e. perching knife, and (perching knife is located at system confined space on the hermatic door in outside Outside, such as Fig. 1), with the sticky object of easy cleaning splicing groove, and in order to consider sealing, the perching knife can be placed in inner side On hermatic door (perching knife is located within system confined space, such as Fig. 2).

In the present embodiment, in order to prevent the intermediary's water in the cooling working medium and hollow layer in expansion tank because temperature is extremely low When, it is impossible to effectively run using the heat-exchange system, so be also equipped with auxiliary in the expansion tank and in hollow layer adding Hot device, to wait when needed, can fast heating, the hollow layer of the expansion tank has water supplement port.

In one embodiment, all equipment, components with contact with sea water etc., are corrosion resistances.

Used as a kind of embodiment, the antifreeze method of the cooling winterization system of the wind-powered electricity generation based on sea water source heat pump of the wind power plant is such as Under：

S1. outdoor channel is excavated along wind park to sea, including seawater introduces channel and seawater discharge channel, drainage seawater is extremely Wind-powered electricity generation on-site；

S2. selector distributing canal section installs the wind based on sea water source heat pump of following wind power plants in the seawater discharge channel Electricity cooling winterization system, and channel introducing is introduced as the seawater of cooling water by seawater, it is changed with turbine condenser With the steam that liquefies, the seawater (about 18 degree) after exchanging heat for the first time is drained to seawater discharge to heat by the heat exchange to exchange heat for the first time Channel；

S3. expansion tank hollow layer is communicated in PE intermediaries water return duct, when Wind turbines are shut down, the cooling of Wind turbines Cooling working medium throttle water tank in system, when Wind turbines need to start, what is flowed in PE intermediaries water return duct comes from Intermediary's water (about 10 degree) of hollow layer and (the about 18 degree) heat exchange of seawater for entering the closed irrigation canals and ditches, improve the temperature of intermediary's water Degree, heat is supplied to the cooling working medium in expansion tank, is melted it and is transported to cooling system；

During intermediary's water and seawater to make heat exchange, the boil-off gas of seawater are condensed in the inclination of the closed irrigation canals and ditches to be covered, And enter guiding gutter with collection and purification water along condensate drainage channel, during intermediary's water and seawater to make heat exchange of the hollow layer, Corrosion-resistant net circulation transmission filtering, and scalped in transmission process by outer net perching knife and be bonded in corrosion-resistant online impurity, arrange ditch In impurity periodically struck off by scraper plate.

The above, the protection domain of only the invention preferably specific embodiment, but the invention is not Be confined to this, any one skilled in the art in the technical scope that the invention is disclosed, according to the present invention The technical scheme of creation and its inventive concept are subject to equivalent or change, should all cover the invention protection domain it It is interior.

Claims

1. a kind of wind-powered electricity generation based on sea water source heat pump of wind power plant cools down winterization system, it is characterised in that including expansion tank, wind Electric cooling system, heat-exchange system, the expansion tank are connected with cooling system, and the expansion tank is double layer hollow formula swelling water Case, expansion tank hollow layer is communicated in the PE intermediaries water return duct of heat-exchange system；

Described cooling system includes water pump, Hydraulic Station, generator, gear-box, frequency converter, heat exchanger, thermosistor and cooling Device, one end of expansion tank is connected with the water pump of cooling system, and the other end connects the second thermosistor, described Hydraulic Station, generating Machine, gear-box, frequency converter one end are connected with water pump and pressure gauge, and the other end is respectively connected with a heat exchanger, respectively first Heat exchanger, second heat exchanger, the 3rd heat exchanger, the 4th heat exchanger, wherein, Hydraulic Station is exported through first heat exchanger Be connected with the other end of described second heat exchanger by one first thermosistor afterwards, also by one the 3rd thermosistor with it is described The other end of the 4th heat exchanger is connected, and described cooler is another with the 3rd described heat exchanger by one second thermosistor One end is connected；

The heat-exchange system includes closed irrigation canals and ditches, and it has lid (1) in tilt flat plate type, the outer surface laying of the upper lid (1) Heat-insulation layer, along the incline direction of the upper lid (1), opens up some condensate drainage channels thereon, each drainage canal Road converges in the guiding gutter (2) on the inclination base for being placed in the upper lid (1), and hermatic door is installed at the both ends of the closed irrigation canals and ditches, The guiding gutter (2) is stretched out by hermatic door, and water inlet is arranged on the hermatic door of side, and with screen pack, the tilt flat plate The angle of inclination that (1) is covered in type is 5~10 degree；

The horizontal lower cover of the irrigation canals and ditches lays ZuUXing PE intermediaries water return duct (3), each PE intermediaries water return duct (3) of the group Between uniformly arranged in Semi surrounding type, and gap filling sand it is closely knit, each PE intermediaries water return duct (3) is provided with circulating pump, and Connected with intermediary water storage tank, and pacify cartridge control valve on connecting pipe, and each PE intermediaries water return duct (3) and expansion tank Hollow layer is connected；

Exchanged heat with the turbine condenser of thermal power plant as the seawater of cooling water, the seawater after heat exchange is entered by side hermatic door, Exchanged heat with the intermediary's water in PE intermediaries water return duct (3) in the closed irrigation canals and ditches；Covered on the upper strata of PE intermediaries water return duct (3) One layer of water-permeable brick (4) of lid, the water-permeable brick (4) inclines laying, and is dug out positioned at the vicinity of the water-permeable brick (4) for inclining lowest part Row's ditch, makes the water-permeable brick (4) for being located at inclination lowest part be connected with row's ditch；The upper lid (1) and the laying inclination side of water-permeable brick (4) To consistent, the angle of inclination of the water-permeable brick is 7~12 degree；

Corrosion-resistant net (5) is laid on the upper strata of water-permeable brick (4), and the corrosion-resistant net (5) is single layer of wires net, and twine is vertical in transverse and longitudinal Intersect uniform arrangement；Drive roll (6) and driven voller (7) on the support frame of left and right sides hermatic door, the first driving chain (8) be connected with the front end of the drive roll (6) and the front end of the driven voller (7) respectively, the second driving chain (12) respectively with The rear end of the drive roll (6) is connected with the rear end of the driven voller (7), so that the drive roll (6) and the driven voller (7) Linkage, the corrosion-resistant net (5) is covered on the first driving chain (8) or the second driving chain (12)；The both sides sealed door Support frame in one or two outer net perching knife is installed；

Auxiliary heater is also equipped with the expansion tank and in hollow layer.

2. the wind-powered electricity generation based on sea water source heat pump of wind power plant as claimed in claim 1 cools down winterization system, it is characterised in that institute The hollow layer for stating expansion tank has water supplement port.