CN206583339U - A kind of generator unit stator winding heat reclamation device - Google Patents

A kind of generator unit stator winding heat reclamation device Download PDF

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Publication number
CN206583339U
CN206583339U CN201720137099.9U CN201720137099U CN206583339U CN 206583339 U CN206583339 U CN 206583339U CN 201720137099 U CN201720137099 U CN 201720137099U CN 206583339 U CN206583339 U CN 206583339U
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stator winding
air
water
generator unit
heat
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李建勋
刘旭东
李文胜
张宝军
周平
夏林
贾约明
崔男寿
李海臣
刘璇
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Shanghai Energy Technology Development Co.,Ltd.
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Cpi Power Engineering Co Ltd
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Abstract

The utility model provides a kind of generator unit stator winding heat reclamation device, including separate type heat pipe exchanger, the evaporator of separate type heat pipe exchanger is in the inner cold water case at stator winding cooling water control station, and the condenser of separate type heat pipe exchanger is in heating cabinet;The delivery port of stator winding cooling water system connects the entrance of the inner cold water case, the water inlet of the outlet connecting stator winding cooling water system of the inner cold water case;The heating cabinet is provided with air inlet and air outlet, and air inlet is connected with blower fan, and air outlet is connected by airduct with low-grade exhaust heat using device.The low-grade exhaust heat for being produced generator unit stator winding by separate type heat pipe exchanger utilizes device for low-grade exhaust heat.The utility model has the advantages that simple in construction, safe and reliable, energy-conservation, saves equipment investment and operating cost, and can be run under annual full working scope, unit economy is improved, beneficial to the sustainable development of environment.

Description

A kind of generator unit stator winding heat reclamation device
Technical field
The utility model is related to a kind of generator unit stator winding heat reclamation device, belongs to electricity generation system technical field.
Background technology
By taking 350MW coal fired power plants as an example, Turbo-generator Set is arranged in steam turbine building 12.600m operating layers.The volume of generator Power is determined for 350MW, and the heat dissipation capacity of the generation such as its stator winding and bus-bar is 1132kW;When feed pump uses electric pump, hair The maximum continuous power output (deduction exciting power) of motor is 365MW, the heat dissipation capacity of the generation such as its stator winding and bus-bar For 1231kW.
The type of cooling of generator generally uses Water hydrogen.The winding and iron core of generator unit stator are main heating parts Part.
Generator hydrogen cooling system is enclosed hydrogen gas circulating system, and the function of hydrogen gas cooling system is using dry hydrogen pair Generator is cooled down, and hot hydrogen is cooled down by the hydrogen cooler of generator by closed-type circulating cooling water system.Rotor windings hydrogen It is interior cold, stator core and the cooling of other structural member hydrogen surfaces.
Generator unit stator winding internal water cooling, using closed cycle, i.e., above-mentioned closed-type circulating cooling water system, as shown in figure 1, The function of stator winding cooling water system 81 is that generator windings inside is cooled down using the clean, water of free from admixture.Stator The inflow temperature scope of winding cooling water is 40~50 DEG C, and inflow temperature has self-checking device so that stator coil does not condense (water temperature is higher than 5 DEG C or so of hydrogen temperature) simultaneously keeps inflow temperature basicly stable (45 ± 3 DEG C) and not influenceed by generator load, fixed Exit water temperature is not more than 85 DEG C under sub- winding cooling water THA operating modes (heat consumption rate examination operating mode).Stator winding cooling water system 81 Water outlet enter in the inner cold water case 7 at stator winding cooling water control station 80, water in inner cold water case 7 by water cooler 8 with Stator winding cooling water system 81 is returned again to after the heat exchange of outer loop cooling water, cooling, generator windings inside is cooled down, Realize closed cycle.
Stator winding cooling water control station 80 is arranged in steam turbine building 0.000m bottoms, including anti-corrosive water pump, water cooler 8th, inner cold water case 7, instrument and meter, valve and connecting line etc., and be assembled on a chassis.Wherein anti-corrosive water pump sets two Platform a, fortune one is standby, when water pump discharge pressure is less than setting valve, and the action of pressure controller normal open switch is connected electrical control and returned Road, starts stand-by pump.Inner cold water case 7 is inflatable water tank, and sets barometric control unit.In generator unit stator winding cooling water Bypass and valve are also set up on import and export pipeline, to carry out back flush to stator winding.Anti-corrosive water pump control loop is broken Electricity and low joint (series connection) protective loop of intake pressure are to adjust at stator winding cooling water intake that pressure controller is normally closed to be opened Close working value and cut off value.The setting procedure of anti-corrosive water pump outlet pressure controllers is arrived when anti-corrosive water pump outlet pressure is low During 0.4MPa or so, pressure controller normally closed switch action closure makes standby pump startup, when the rise of anti-corrosive water pump outlet pressure During to about 0.5MPa, pressure controller normally closed switch disconnects.
In above-mentioned generator unit stator winding cooling system, the heat of generator closed-type circulating cooling water system is followed by outside Ring cooling water is taken away, and heat is not utilized, and this partial heat is also than larger, and therefore, this part of waste heat, which is utilized, turns into power station One of development object of most worthy.
At present, most of refrigeration air-conditioner is all, with electrical energy drive, to consume substantial amounts of electric energy simultaneously, also bringing Refrigeration working medium freon therefore, uses low-grade heat source for driving energy to the pollution of environment (greenhouse effects and damage the ozone layer) Source, using the natural refrigerant without CFCs (CFC) problem as cycle fluid refrigeration modes (such as absorption type, it is absorption, partly lead System is cold etc.), it is a significant research topic to solve environmental protection in refrigeration air-conditioner and power saving.
The operation principle of adsorption refrigeration system device is:Made with porous solid (such as silica gel, activated carbon, calcium chloride) For adsorbent, using certain gas (such as water, methanol, ethanol, ammonia) as refrigerant, the system of physical absorption or chemisorbed is formed Cold working medium pair, using solid absorbent to the adsorption capacity of gas with temperature is different and different, solid absorbent adsorption refrigerating agent Gas (equipressure absorption) so that the continuous sweat cooling of refrigerant liquid (waits appearance to be depressured), leads to after solid absorbent adsorption saturation Heating desorption (equipressure desorption) is crossed, refrigerant gas is separated out, and is allowed to be condensed into refrigerant liquid (waiting appearance to boost), one is completed Kind of refrigeration cycle.
Adsorption refrigeration system device have simple in construction, easily manufactured, movement-less part, stable, reliability it is high, Pollution-free, noiseless, using safety, long lifespan, strong applicability the advantages of, simply its need consume outside heat, to heat suction Solid absorbent after attached saturation, desorbs it.
Utility model content
How the technical problems to be solved in the utility model is to more than generator unit stator winding closed circuit cooling system Heat is efficiently utilized.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is to provide a kind of generator unit stator winding heat and returned Receiving apparatus, it is characterised in that:Including separate type heat pipe exchanger, the evaporator of separate type heat pipe exchanger is cold located at stator winding But in the inner cold water case at water management station, the condenser of separate type heat pipe exchanger is in heating cabinet;Stator winding cooling water system The delivery port of system connects the entrance of the inner cold water case, and the outlet connecting stator winding cooling water system of the inner cold water case enters The mouth of a river;The heating cabinet is provided with air inlet and air outlet, and air inlet is connected with blower fan, and air outlet utilizes device with low-grade exhaust heat Connection.
Preferably, working medium is provided with the evaporator and condenser of the separate type heat pipe exchanger, the outlet of evaporator leads to The import that tracheae connects condenser is crossed, the outlet of condenser connects the import of evaporator by liquid pipe, forms working medium loop.
Preferably, the condenser is located at the top of evaporator, forms difference in height therebetween.
Preferably, the low-grade exhaust heat includes but is not limited to adsorption refrigeration system device, steam turbine building heat using device Wind heating system.
Preferably, the outlet of the inner cold water case passes through water cooler and bypass pipe and the stator winding cooling water system Water inlet connection, bypass pipe is in parallel with water cooler.
It is highly preferred that the bypass pipe is provided with valve, the import and export of the water cooler also are provided with valve.
The generator unit stator winding heat reclamation device that the utility model is provided is in use, the evaporation of separate type heat pipe exchanger Device is flooded by the hot water returned from the generator vapour end of stator winding cooling water system in inner cold water case, heated, evaporator table Heat is transmitted to the working medium in evaporator, working medium is changed into gaseous state from liquid after being absorbed heat in evaporator, passes through tracheae after the heat absorption of face Flow to condenser.Gaseous working medium is condensed after being exchanged heat in condenser with heating cabinet import cold wind, by gas after releasing latent heat through phase transformation State is changed into liquid, and working medium relies on gravity from condenser reflux to evaporator by liquid pipe, so circulation, and amount of heat is by evaporator Reach condenser.It is low-grade that heating cabinet outlet hot blast is delivered to adsorption refrigeration system device, steam turbine building warm-air heating system etc. Waste heat utilization device, the heat needed for desorption process is provided to adsorption refrigeration system device, steam turbine building warm-air heating system is given Air heating is provided.
It is highly preferred that adsorption refrigeration system device includes air-cooled condenser, air-cooled condenser passes through airduct and the wind The air inlet connection of machine.The air intake of blower fan 5 is preheated using the waste heat of the air-cooled condenser of adsorption refrigeration system device, The COP values of raising system.
Further, the airduct that the air-cooled condenser is connected with the blower fan is provided with switching valve, is easy to according to absorption The low-grade exhaust heats such as formula refrigerating system device, steam turbine building warm-air heating system carry out on/off switch using the running status of device.
It is highly preferred that also including Air-Water preheater, the water side-entrance of Air-Water preheater connects the inner cold water case Outlet, the water side outlet of Air-Water preheater connects the water inlet of the stator winding cooling water system;Air-Water is preheated The air side-entrance of device connects the air outlet of the blower fan, and the air side outlet of Air-Water preheater connects the heating cabinet Air inlet.The waste heat for going out saliva using inner cold water case is preheated to the import cold wind of heating cabinet, further to improve system COP values.
Further, the air side of the Air-Water preheater, be equipped with valve in the import and export of water side, be easy to basis Actual condition carries out on/off switch.
The utility model provide device overcome the deficiencies in the prior art, with it is simple in construction, safe and reliable, energy-conservation, The advantage of equipment investment and operating cost is saved, and can be run under annual full working scope, unit economy is improved, beneficial to environment Sustainable development.Saving water resource is also very beneficial, had broad application prospects.
Brief description of the drawings
Fig. 1 is traditional generator unit stator winding closed circuit cooling system schematic diagram;
Fig. 2 is the generator unit stator winding heat reclamation device schematic diagram that embodiment 1 is provided;
Wherein:1st, the evaporator of separate type heat pipe exchanger;2nd, the condenser of separate type heat pipe exchanger;3rd, tracheae;4、 Liquid pipe;5th, blower fan;6th, heating cabinet;7th, inner cold water case;8th, water cooler;9 bypass pipes;80th, stator winding cooling water control station; 81st, stator winding cooling water system;82nd, steam turbine building warm-air heating system;83rd, adsorption refrigeration system device.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this Utility model rather than limitation scope of the present utility model.In addition, it is to be understood that reading the content of the utility model instruction Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen Please appended claims limited range.
Embodiment 1
The generator unit stator winding heat reclamation device schematic diagram that Fig. 2 provides for the present embodiment, described generator unit stator around Group heat reclamation device include stator winding cooling water system 81, stator winding cooling water control station 80, separate type heat pipe exchanger, Steam turbine building warm-air heating system 82, adsorption refrigeration system device 83 etc..
Separate type heat pipe exchanger is made up of evaporator 1, condenser 2, working medium loop (tracheae 3, liquid pipe 4) etc., evaporator 1 With condenser 2 built with working medium, the outlet of evaporator 1 connects the import of condenser 2 by tracheae 3, and the outlet of condenser 2 passes through Liquid pipe 4 connects the import of evaporator 1, forms working medium loop.Heat is transmitted to the work in evaporator after the heat absorption of the surface of evaporator 1 Matter, working medium is changed into gaseous state after being absorbed heat in evaporator 1 from liquid, and condenser 2 is flowed to by tracheae 3.Gaseous working medium is in condenser 2 Interior condensation, liquid is changed into after releasing latent heat through phase transformation from gaseous state, and working medium is back to steaming by gravity by liquid pipe 4 from condenser 2 Device 1, so circulation are sent out, amount of heat reaches condenser 2 by evaporator 1.Under normal circumstances, condenser 2 is arranged in evaporator 1 Top, forms difference in height, the liquid refrigerant in condenser 2 is relied on gravity reflux.
The water outlet of stator winding cooling water system 81 enters in the inner cold water case 7 at stator winding cooling water control station 80, The evaporator 1 of arrangement separate type heat pipe exchanger in inner cold water case 7, evaporator 1 is cooled down in inner cold water case 7 from stator winding The hot water that the generator vapour end of water system 81 is returned floods, heated.The evaporator 1 and stator winding of separate type heat pipe exchanger are cold But water management station 80 is arranged in steam turbine building 0.000m bottoms together.
The condenser 2 of separate type heat pipe exchanger is arranged in heating cabinet 6.The condenser 2 of separate type heat pipe exchanger And heating cabinet 6 is arranged in steam turbine building 6.300m intermediate layers.Difference in height is formed between condenser 2 and evaporator 1.Heating cabinet 6 is forward and backward Air inlet, air outlet are respectively arranged with, the air inlet of heating cabinet 6 is connected with blower fan 5, and the air outlet of heating cabinet 6 passes through wind respectively Pipe is connected with adsorption refrigeration system device 83, steam turbine building warm-air heating system 82, and air-valve is provided with airduct, will according to using Ask and be adjusted.
The heat of the outlet hot water of stator winding cooling water system 81 is reached by evaporator 1 by separate type heat pipe exchanger Condenser 2, condenser 2 exchanges heat with the air intake that blower fan 5 is introduced, and by import cold air heating into hot blast, hot blast is delivered to absorption type system Cooling system device 83 and/or steam turbine building warm-air heating system 82, to needed for the offer desorption process of adsorption refrigeration system device 83 Heat, give steam turbine building warm-air heating system 82 provide air heating.
Adsorption refrigeration system device 83 is continuous type, is provided with two (or more than two) adsorbent beds, passes through valve Continuous cooling is realized in automatic switchover (valve receives the electric signal of the time relay), so that waste heat makes full use of.Absorption type system Cooling system device 83 generally uses water-cooled condenser, and adsorption refrigeration system device 83 is arranged in the middle of steam turbine building 6.300m Layer.
Being cooled in the water cooler 8 of traditional structure on the water route of side increases a bypass pipe 9, bypass pipe 9 and water cooler 8 It is in parallel.That is the outlet of inner cold water case 7 connects the high temperature side entrance of water cooler 8 and the one end of bypass pipe 9, the high temperature side outlet of water cooler 8 And the other end of bypass pipe 9 conflux after connecting stator winding cooling water system 81 water inlet.Valve, water cooling are set on bypass pipe 9 But the high temperature side of device 8 is imported and exported and low temperature side is imported and exported and is also respectively provided with valve.
When separate type heat pipe exchanger works, inner cold water case 7 go out saliva be directly over bypass pipe 9 return stator winding it is cold But water system 81, cool down to generator windings inside, realize closed cycle.When separate type heat pipe exchanger does not work, It is still cold by returning again to stator winding after water cooler 8, with the heat exchange of outer loop cooling water, cooling that inner cold water case 7 goes out saliva But water system 81, cool down to generator windings inside, realize closed cycle.Outer loop cooling water system is used as standby work Make water source.
In the present embodiment, separate type heat pipe exchanger is employed, heat exchange of heat pipe there are following characteristics:1) it is simple in construction, nothing Running gear, operational reliability is high, manufacture and easy to maintenance, strong adaptability, flexible arrangement.2) identical heat condition is being reclaimed Under, the cooling fluid temperature obtained using heat exchange of heat pipe is higher than with the cooling fluid temperature obtained by other heat exchangers, reclaims phase Useful value with heat is high.3) because the heat exchange of hot and cold medium is carried out in the outer surface of heat pipe, evaporator, condenser use ring Shape enhanced fin heat transfer, easily extension is heated and endotherm area.The structures shape of heat exchange of heat pipe it be typically countercurrently change Heat, almost isothermal is run heat pipe again, therefore heat exchange of heat pipe has very high waste heat recovery efficiency.4) heat exchange of heat pipe conducts heat The big several orders of magnitude of the metal bar of the identical physical dimension of coefficient ratio, heat transfer rate is thousands of times to ten thousand times of same metal, 0.1 DEG C The temperature difference be to have thermal response, can overcome the disadvantages that the small influence of the gaseous exchange coefficient of heat transfer.5) need to lay long pipe as carried out heat exchange During the system of road, do not influence substantially.6) physical state of hot and cold medium can be different, you can for gas, or liquid.7) cold, Thermal medium does not have cross-contamination issue.8) can to avoid the occurrence of single heat pipe long and cause to reach and take for separate type heat pipe exchanger The band limit, and the problem of manufacture, transport inconvenience.
The low-grade exhaust heat for being produced generator unit stator winding by separate type heat pipe exchanger is used for adsorbent refrigerator, Heating solid absorbent simultaneously is allowed to desorb, and separates out refrigerant gas, produces chilled water;Or for factory building cold season air heating;Or It is other it is suitable the need for low-grade heat source place.
The generator unit stator winding heat reclamation device that the present embodiment is provided has safe and reliable, energy-conservation, saves equipment investment Advantage with operation, system simplify under operating cost, annual full working scope, improves unit economy, beneficial to the sustainable of environment Development.Saving water resource is also very beneficial, particularly with northern China water-deficient area.Therefore, have broad application prospects.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, and its difference is:Adsorption refrigeration system device 83 uses air-cooled condensation Device, air-cooled condenser is connected by airduct with the air inlet of the blower fan 5, utilizes the air-cooled cold of adsorption refrigeration system device 83 The waste heat of condenser is preheated to the air intake of blower fan 5.Airduct be provided with switching valve, be easy to according to adsorption refrigeration system device, The low-grade exhaust heats such as steam turbine building warm-air heating system carry out on/off switch using the running status of device, improve the COP of system Value.
Embodiment 3
The present embodiment is substantially the same manner as Example 1, and its difference is:Also include Air-Water preheater, Air-Water preheating The water side-entrance of device connects the outlet of the inner cold water case 7, and the water side outlet connection stator winding of Air-Water preheater is cold But the water inlet of water system 81;The air side-entrance of Air-Water preheater connects the air outlet of the blower fan 5, Air-Water preheating The air side outlet of device connects the air inlet of the heating cabinet 6.Go out import of the waste heat to heating cabinet of saliva using inner cold water case Cold wind is preheated, and switching valve is equipped with each import and export of Air-Water preheater, is easy to carry out ON/OFF according to actual condition Switching, further to improve the COP values of system.

Claims (10)

1. a kind of generator unit stator winding heat reclamation device, it is characterised in that:Including separate type heat pipe exchanger, separate heat pipe The evaporator (1) of heat exchanger is in the inner cold water case (7) at stator winding cooling water control station (80), separate type heat pipe exchanger Condenser (2) in the heating cabinet (6);The delivery port of stator winding cooling water system (81) connects the inner cold water case (7) Entrance, the water inlet of the outlet connecting stator winding cooling water system (81) of the inner cold water case (7);The heating cabinet (6) Provided with air inlet and air outlet, air inlet is connected with blower fan (5), and air outlet is connected with low-grade exhaust heat using device.
2. a kind of generator unit stator winding heat reclamation device as claimed in claim 1, it is characterised in that:The separate heat pipe Working medium is provided with the evaporator (1) and condenser (2) of heat exchanger, the outlet of evaporator (1) connects condenser by tracheae (3) (2) import, the outlet of condenser (2) connects the import of evaporator (1) by liquid pipe (4), forms working medium loop.
3. a kind of generator unit stator winding heat reclamation device as claimed in claim 1 or 2, it is characterised in that:The condenser (2) top of evaporator (1) is located at, difference in height is formed therebetween.
4. a kind of generator unit stator winding heat reclamation device as claimed in claim 1, it is characterised in that:The low-grade exhaust heat Include but is not limited to adsorption refrigeration system device (83), steam turbine building warm-air heating system (82) using device.
5. a kind of generator unit stator winding heat reclamation device as claimed in claim 1, it is characterised in that:The inner cold water case (7) outlet is connected by water cooler (8) and bypass pipe (9) with the water inlet of the stator winding cooling water system (81), Bypass pipe (9) is in parallel with water cooler (8).
6. a kind of generator unit stator winding heat reclamation device as claimed in claim 5, it is characterised in that:The bypass pipe (9) Valve is provided with, the import and export of the water cooler (8) also are provided with valve.
7. a kind of generator unit stator winding heat reclamation device as claimed in claim 4, it is characterised in that:The absorption type refrigerating System and device (83) includes air-cooled condenser, and air-cooled condenser is connected by airduct with the air inlet of the blower fan (5).
8. a kind of generator unit stator winding heat reclamation device as claimed in claim 7, it is characterised in that:The air-cooled condenser The airduct being connected with the blower fan (5) is provided with switching valve.
9. a kind of generator unit stator winding heat reclamation device as claimed in claim 1, it is characterised in that:Also include Air-Water Preheater, the water side-entrance of Air-Water preheater connects the outlet of the inner cold water case (7), and the water side of Air-Water preheater goes out The water inlet of the mouth connection stator winding cooling water system (81);The air side-entrance of Air-Water preheater connects the wind The air outlet of machine (5), the air side outlet of Air-Water preheater connects the air inlet of the heating cabinet (6).
10. a kind of generator unit stator winding heat reclamation device as claimed in claim 9, it is characterised in that:The Air-Water is pre- Valve is equipped with the air side of hot device, the import and export of water side.
CN201720137099.9U 2017-02-15 2017-02-15 A kind of generator unit stator winding heat reclamation device Active CN206583339U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109120105A (en) * 2018-09-29 2019-01-01 东方电机控制设备有限公司 A kind of Generator Stator Cooling water system anti-siphon means
CN110762600A (en) * 2019-09-26 2020-02-07 南京航空航天大学 Heat recovery and heat supply system of distributed data center

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109120105A (en) * 2018-09-29 2019-01-01 东方电机控制设备有限公司 A kind of Generator Stator Cooling water system anti-siphon means
CN109120105B (en) * 2018-09-29 2024-02-20 东方电气自动控制工程有限公司 Anti-siphon device of generator stator cooling water system
CN110762600A (en) * 2019-09-26 2020-02-07 南京航空航天大学 Heat recovery and heat supply system of distributed data center
CN110762600B (en) * 2019-09-26 2022-01-04 南京航空航天大学 Heat recovery and heat supply system of distributed data center

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Address after: 200233 No. 7, Lane 888, Tianlin Road, Minhang District, Shanghai

Patentee after: Shanghai Energy Technology Development Co.,Ltd.

Address before: 201100 No.7, Lane 888, Tianlin Road, Minhang District, Shanghai

Patentee before: CPI ELECTRIC POWER ENGINEERING CO.,LTD.

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