CN206207395U - Using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure - Google Patents
Using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure Download PDFInfo
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- CN206207395U CN206207395U CN201620986588.7U CN201620986588U CN206207395U CN 206207395 U CN206207395 U CN 206207395U CN 201620986588 U CN201620986588 U CN 201620986588U CN 206207395 U CN206207395 U CN 206207395U
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Abstract
The utility model discloses a kind of boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure, multiple hole exhaust stacks, and the different vapour source of multiple porous exhaust stack correspondences are provided with heater case body；The entrance of the hybrid many source of the gas heaters of described low pressure is connected with condenser, and outlet is connected with surface-type mesolow heater；Described surface-type mesolow heater includes multiple, and is sequentially connected in series to form Multi-stage heating.Described surface-type mesolow heater final stage outlet is connected with the entrance of boiler feed pump.Flowed to by boiler feedwater, boiler feed pump is arranged in top heater outlet in boiler feedwater backheat deaerating type of cycles.The boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure of the present utility model eliminates oxygen-eliminating device, improves unit safety, reduces equipment, pipeline and the valve of high pressure, improves unit reliability；Condenser cold end loss is reduced, unit economy is improve.
Description
Technical field
The utility model is related to a kind of boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure, main
To be applied to subcritical, super (super-) critical generating set circulation system.
Background technology
In subcritical, super (super-) critical generating set circulation system, the Steam Actuation steam turbine that boiler is produced
Acting, drives electrical power generators, and then as exhaust steam, exhaust steam is changed into condensing by the condenser cooling that turbine low pressure cylinder is exported
Water, condensate is fed again into boiler by intensification, and is changed into steam in the boiler, so moves in circles.It is steady to ensure boiler
Fixed burning, the condensate for sending into boiler needs to be heated to the design temperature of boiler feedwater.The thermal source of heating boiler feed water comes from
The low pressure (LP) cylinder of steam turbine draws gas and drawn gas with intermediate pressure cylinder, and the firing equipment used by heating boiler feed water is respectively boiler feedwater low pressure and adds
Hot device, oxygen-eliminating device and high-pressure heater.
In the backheat feed water system of boiler is drawn gas in conventional thermal power plant, low-pressure heater typically uses surface-type knot
Structure.Vapour side and water side working medium reach the purpose of feedwater backheat by restraining indirect heat transfer.In traditional surface heater,
When extraction pressure subatmospheric, surface heater actual motion end difference is often very big, such as turbine low pressure cylinder end two
The corresponding low-pressure heater of level.In contact(-type) heater, because carbonated drink directly mixes, condensate can be heated to pressure of drawing gas
Saturation temperature under power, that is, realize " zero end is poor " operation, improves backheat effect, and can also removing unit divide incondensable gas,
Reduce solidifying water-soluble oxygen.And leak into the air opposite end difference influence very little of contact(-type) heater.This is using contact(-type) heater
Main advantage.
In the production procedure that conventional heat generates electricity, to prevent the oxygen of circulation system under the high temperature conditions to boiler
The oxide etch of feedwater piping, boiler heating surface and heat exchanger, eliminates the incondensable gases such as oxygen to heat exchanger effectiveness
Influence, is designed with deaerator device to ensure that the Steam-water Quality of circulation system in circulation system.Oxygen-eliminating device cloth
It is placed between low pressure condensate water system and high-pressure feed water system.Oxygen-eliminating device is heated to boiler feedwater accordingly using extracted steam from turbine
Saturation temperature under pressure, and steam that heater condensate and boiler blow down flash device are produced etc. is reclaimed, to reduce power plant
Loss of steam and water.
As thermal power generation technology develops in terms of Large Copacity, high parameter etc., foreign study finds the specific of original feedwater
There is flowing accelerated corrosion team in handling process, under the reproducibility environment of feedwater deaeration, the ferroso-ferric oxide of metal erosion generation
Short texture, it is impossible to make metal enter passivation region.By new Water purification technology, the i.e. mode of Feedwater oxygen treatment, make to
The reproducibility environment of water deoxygenation is converted into oxidative environment, and original ferroso-ferric oxide film is become into fine and close di-iron trioxide protects
Cuticula, can suppress pipeline and equipment flows the generation of accelerated corrosion.Increasing extra-supercritical unit uses feed water oxygenation
Processing mode.So in unit normally runs, the deoxygenation of the use of feed water oxygenation technology to original therrmodynamic system standard configuration
Device proposes challenge, and the reduction of its deoxygenation function even turns into unnecessary.If solve unit water supply system needs dimension in startup stage
Low-oxygen environment is held, cancels original deaerator equipment, design is optimized to thermodynamic cycle heat regenerative system, give super (super-) critical unit
Advanced thinking is brought in the composition of therrmodynamic system, the cost of heating power power plant project and the economy of raising unit can be reduced
Energy.
Utility model content
It is not enough present in heat exchange cycle system for traditional extracted steam from turbine heating boiler feed water, the utility model
There is provided a kind of boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure.
The technical solution adopted in the utility model is as follows：
A kind of boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure, including low pressure mixing
The many source of the gas heaters of formula, the hybrid many source of the gas heaters of described low pressure include housing, are provided with main solidifying in described case top
Entrance is born water, bottom is provided with condensation water out, multiple porous tanks, described multiple porous water are provided with described enclosure interior
Groove is arranged in order from top to bottom in housing, and porous exhaust stack is provided between adjacent porous tank, and multiple porous is put
Dissipate the different vapour source of pipe correspondence.
A kind of boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure, including low pressure mixing
The many source of the gas heaters of formula, the hybrid many source of the gas heaters of described low pressure, including housing, are provided with main solidifying in described case top
Entrance is born water, bottom is provided with condensation water out, the top in described housing is provided with multiple horizontally arranged successively from top to bottom
Porous tank, the bottom in described housing is provided with multiple porous exhaust stacks horizontally arranged successively from top to bottom, and multiple
The different vapour source of porous exhaust stack correspondence.
Described porous exhaust stack is arranged in the vapour side space in the hybrid many source of the gas heaters of low pressure, or is arranged in low
Press hybrid many source of the gas heater reclaimed water side spaces.
The described corresponding vapour source of multiple porous exhaust stack includes extracted steam from turbine vapour source, cold reheat steam source, height
Warm low-pressure steam vapour source and turbine shaft leak sealing vapour vapour source, an a kind of vapour source of porous exhaust stack correspondence.
The entrance of the hybrid many source of the gas heaters of described low pressure is connected with condenser, the hybrid many sources of the gas of described low pressure
The outlet of heater is connected with surface-type mesolow heater.
Described surface-type mesolow heater includes multiple, and multiple surface-type mesolow heaters are sequentially connected in series, shape
Into Multi-stage heating；And the outlet of final stage feed-water heater is connected with the entrance of boiler feed pump.
Relay pump is in series between adjacent surface-type mesolow heater.
Flowed to by boiler feedwater, the boiler feed pump of the feed water system of boiler is arranged in final stage surface-type mesolow heater and goes out
Mouthful.
The entrance of described boiler feed pump is also in series with stable-pressure device.
Described stable-pressure device is voltage stabilizing main pipe, vacuum tank or water tank of voltage regulation.
Specific working method：
Steam is flowed out by boiler, sequentially enters steam turbine high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, pushing turbine acting, band
Dynamic electrical power generators, as exhaust steam, condensation turns into condensate into condenser, flows into condensate pump boosting, mixed into low pressure
In box-like many source of the gas heaters, heated deoxygenation flows through surface-type mesolows at different levels into two grades of condensate pumps, after boosting step by step
Heater, most completes circulation through boiler feed pump boosting injection boiler afterwards.
The utility model can improve system heat-economy；System reliability can be improved；Disclosure satisfy that the various works of unit
The operation demand of condition feedwater deaeration；Condenser cold end loss can be reduced；High-temperature low-pressure overflow steam utilization can be improved；Energy
Enough improve gland steam utilization rate；High-pressure feed water equipment, pipeline and valve can be reduced；Oxygen-eliminating device can be cancelled；Can reduce
Boiler feed pump lift demand；Boiler feedwater flow process can be simplified；The use low pressure for being capable of cost saving is hybrid
The boiler water feeding backheat deaerating type of cycles of many source of the gas heaters.
Compared with prior art, the beneficial effects of the utility model are：
1. the utility model can improve system heat-economy.The utility model uses the hybrid many source of the gas heaters of low pressure
Substitution surface-type low-pressure heater and gland heater, eliminate the end of steam turbine water supply heat back system mesolow heating part
Difference；Shaft seal steam, homophony valve lever leakage vapour, reheating are adjusted into the multichannel high temperature such as valve lever leakage vapour, steam turbine filling valve lever leakage vapour
The overflow steam of low pressure introduces the hybrid many source of the gas heaters of low pressure, improves high-temperature low-pressure steam utilization rate, improves unit
Heat-economy.
2. the utility model can improve system reliability.The position of boiler feed pump is by legacy system in the utility model
Oxygen-eliminating device outlet port be moved to final stage feed-water heater (by boiler feedwater flow to) outlet, make steam turbine high-pressure cylinder and middle pressure
Cylinder is corresponding to draw gas regenerative feed-water pipeline and valve group operating pressure is greatly reduced, so that the part feedwater piping and valve
High-temperature high-pressure apparatus, pipeline, valve that group can be selected in mesolow feedwater piping and mesolow feed-water valve group, with legacy system
Door is compared, and system reliability gets a promotion.
3. the utility model disclosure satisfy that the operation demand of the various operating mode feedwater deaerations of unit.Low pressure of the present utility model is mixed
In box-like many source of the gas heaters, with extracted steam from turbine as unit normal course of operation in feed water heating the main vapour source of deoxygenation；With axle
Gland sealing steam supply, homophony valve lever leakage vapour, reheating adjust overflow steam and the axle envelope leakages such as valve lever leakage vapour, steam turbine filling valve lever leakage vapour
Vapour is feedwater heating deoxygenation auxiliary steam source, with cold reheat steam, during being unit variable load operation process and unit starting
The main vapour source of feedwater heating deoxygenation.Compared with traditional single vapour source low-pressure heater, variable load operation ability is significantly increased,
And the operation demand of the various operating mode feedwater deaerations of unit can be met.
4. the utility model can reduce condenser cold end loss, improve high-temperature low-pressure overflow steam utilization.Traditional machine
Group is drawn gas in backheating water feed system, and shaft seal steam, homophony valve lever leakage vapour, reheating adjust valve lever leakage vapour, steam turbine filling valve
The overflow steam such as bar leakage vapour are condensed in being introduced directly into condenser, only reclaim working medium, and the heat that it contains is all by circulating cooling
Water is taken away, and causes cold section of loss.In the utility model, shaft seal steam, homophony valve lever leakage vapour, reheating adjust valve lever leakage vapour, vapour
The overflow steam such as turbine filling valve lever leakage vapour are introduced into the hybrid many source of the gas heaters of low pressure, are given for heating boiler
Water, has both reclaimed working medium, and heat has been reclaimed again, reduces cold section of loss for flowing into condenser.
5. the utility model can improve gland steam utilization rate.Conventional rack is drawn gas in backheating water feed system, axle envelope leakage
Vapour enter surface-type gland heater in condensate heat exchange, with larger heat exchange difference, after the completion of heat exchange, what band had surplus heat
Gland steam is entered in condenser and condensed, and reclaims working medium, but lose partial heat.Gland packing leakage is introduced into the utility model
In the hybrid many source of the gas heaters of low pressure, the net quantity of heat that it contains is used for heat-setting water, and utilization rate is improved.
6. the utility model can reduce high-pressure feed water equipment, pipeline and valve.Conventional rack is drawn gas backheating water feed system
In, boiler feed pump is arranged in the feedwater outlet of oxygen-eliminating device, the whole feedwater (flowed to by boiler feedwater) after boiler feed pump
Heat transmission equipment, pipeline and valve must use high voltage parameter.The position of boiler feed pump is by legacy system in the utility model
Oxygen-eliminating device outlet port is moved to final stage feed-water heater (being flowed to by boiler feedwater) outlet, therefore steam turbine high-pressure cylinder and middle pressure
The corresponding regenerative feed-water equipment of drawing gas of cylinder, pipeline and valve group operating pressure can be according to two grades of mesolow parameters of solidifying pump discharge
Type selecting.
7. the utility model can cancel oxygen-eliminating device.The hybrid many source of the gas heating utensils of low pressure used in the utility model
There is feedwater heating deoxygenation function, its feedwater deaeration effect can cross the operation demand for meeting the various operating mode feedwater deaerations of unit.Therefore,
Can cancel and oxygen-eliminating device is generally used in existing system.
8. the utility model can reduce boiler feed pump lift demand.Conventional rack is drawn gas in backheating water feed system, pot
Stove feed pump is arranged in the feedwater outlet of oxygen-eliminating device, and its lift is：The pressure of boiler feedwater inlet absolute altitude；Feedwater pump discharge is at different levels
The resistance crushing of high-pressure heater；The resistance crushing of pipeline, valve between high-pressure heaters at different levels；Final stage feed-water heater (is pressed
Boiler feedwater is flowed to) it is exported to the resistance crushing of boiler inlet pipeline, valve, four sums.In the utility model, boiler feedwater
Pump is arranged in final stage feed-water heater (being flowed to by boiler feedwater) outlet, and its lift is：The pressure of boiler feedwater inlet absolute altitude；Give
Exit of pump is to boiler inlet pipeline, the resistance crushing of valve, sum of the two.Lift is substantially reduced needed for feed pump.
9. the utility model can simplify boiler feedwater flow process.Conventional rack is drawn gas in backheating water feed system, is condensed
Water flows out from condenser, is first boosted (A) by condensate pump, after flowing through surface-type low-pressure heaters at different levels, in entering back into oxygen-eliminating device
Deoxygenation is simultaneously depressured (B), subsequently into fore pump boosting (C), into feed pump boosting (D), as high pressure boiler water supply, passes through
Surface-type high-pressure heaters at different levels, finally enter boiler.In the utility model, boiler feed pump is arranged at final stage feed-water heater
(being flowed to by boiler feedwater) outlet, eliminates oxygen-eliminating device and fore pump.Condensate flows out from condenser, is boosted through condensate pump
Heat deoxygenation in (a) injection hybrid many source of the gas heaters of low pressure, then boosted (b) through two grades of condensate pumps, flow through it is at different levels in
Low-pressure heater, is most directly entered boiler through feed pump boosting (C) afterwards.The utility model feeds water A, B, C, D work conventional boiler
Skill process simplification is a, b, c process.
10. the utility model being capable of cost saving.Surface-type mesolow heater is used in the utility model, it is and existing
The surface-type high-pressure heater for having technology to use is compared, and investment cost is reduced, and the utility model also eliminates fore pump, reduces
Number of devices, while no longer needing high-order arrangement oxygen-eliminating device in the utility model, reduce further building foundation cost.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 (a) is porous tank and porous exhaust stack arranged for interval；Fig. 1 (b) is porous exhaust stack centralized arrangement in mixing
Heater vapour side；Fig. 1 (c) is porous exhaust stack centralized arrangement in hybrid heater water side.
Fig. 2 is the boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure of the present utility model
Figure.
Fig. 3 is the boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure of the present utility model
The system diagram of middle use voltage stabilizing main pipe (vacuum tank or water tank of voltage regulation).
Fig. 4 is the boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure of the present utility model
The middle system diagram using hydrophobic fore pump.
Fig. 5 is to use external during the hybrid many source of the gas heaters of low pressure of the present utility model heat the deoxygenation feed water systems of boiler
The system diagram of drain cooler.
Fig. 6 is the boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure of the present utility model
The system diagram of middle use outer steam cooler.
Fig. 7 is the boiler water feeding backheat deaerating type of cycles of the hybrid many source of the gas heaters of use low pressure of the present utility model
The system diagram of middle use relay pump.
In figure：1. main condensate entrance；2. overflow orifice plate；3. porous tank；4. hydrophobic porous shower；5. gland packing leakage
Porous exhaust stack；6. the porous exhaust stack of extracted steam from turbine；7. the porous exhaust stack of cold reheat steam；8. the high temperature such as door rod leakage vapour is low
The pressure porous exhaust stack of steam；9. condensate spill over pipe；10. water out is condensed；11. incondensable gas outlets；12. housings；
S1. boiler；S2. steam turbine high-pressure cylinder；S3. intermediate pressure cylinder；S4. low pressure (LP) cylinder；S5. generator；S6. condenser；S7. coagulate
Bear water pump；S8. hybrid many source of the gas heaters of low pressure；S9. two grades of condensate pumps；S10. surface-type mesolow heater；S11.
Boiler feed pump；S12. regulating valve；S13. voltage stabilizing main pipe；S14. hydrophobic fore pump；S15. external drain cooler；S16. it is external
Steam condenser；S17. relay pump；
B. shaft seal steam, homophony valve lever leakage vapour, reheating adjust the overflows such as valve lever leakage vapour, steam turbine filling valve lever leakage vapour
Steam；C. gland packing leakage；Q. cold reheat steam.
The many source of the gas contact(-type) heater vapour side regions of I,；The many source of the gas contact(-type) heater water side regions of II,.
Specific embodiment
The utility model is described in detail below in conjunction with the accompanying drawings：
The technical solution of the utility model can improve system heat-economy for one kind；System reliability can be improved；Energy
Enough meet the operation demand of the various operating mode feedwater deaerations of unit；Condenser cold end loss can be reduced；High-temperature low-pressure can be improved
Overflow steam utilization；Gland steam utilization rate can be improved；High-pressure feed water equipment, pipeline and valve can be reduced；Can take
Disappear oxygen-eliminating device；Boiler feed pump lift demand can be reduced；Boiler feedwater flow process can be simplified；Being capable of cost saving
The hybrid many source of the gas heaters of use low pressure boiler water feeding backheat deaerating type of cycles.
Embodiment 1
The hybrid multi-steam source heater of low pressure of the present utility model mainly includes：It is main condensate entrance 1, overflow orifice plate 2, many
The porous exhaust stack 5 of hole tank 3, hydrophobic porous shower 4, gland packing leakage, the porous exhaust stack 6, cold reheat of cold reheat steam
The porous exhaust stack 7 of steam, door rod leakage vapour etc. the porous exhaust stack 8 of high-temperature low-pressure steam, condensate spill over pipe 9, condense water out 10,
Housing 12.
Main condensate entrance 1 is provided with the top of housing 12, bottom is provided with condensation water out 10, is additionally provided with housing 12 not
Noncondensing gas outlet 11, such as shown in Fig. 1 (a), multiple porous tanks 3 is provided with described enclosure interior, and described multiple is more
Hole tank 3 is arranged in order from top to bottom in housing, and porous exhaust stack is provided between adjacent porous tank 3, and multiple
The different vapour source of porous exhaust stack correspondence.
Overflow orifice plate 2 is designed with each porous tank 3, the overflow orifice plate 2 positioned at the bottom connects condensate spill over pipe
9；
Further, porous exhaust stack can be with centralized arrangement；I.e. as shown in Fig. 1 (b), the top in described housing
Multiple porous tanks horizontally arranged successively from top to bottom are provided with, the bottom in described housing is provided with multiple from top to bottom successively
Horizontally arranged porous exhaust stack, and the different vapour source of multiple porous exhaust stack correspondences.
Further, as the porous exhaust stacks of Fig. 1 (c) are arranged in the hybrid many source of the gas heater vapour side region I of low pressure, or
It is arranged in the hybrid many source of the gas heater water side region II of low pressure；
Further, the corresponding vapour source of multiple porous exhaust stacks include extracted steam from turbine vapour source, cold reheat steam source,
High-temperature low-pressure steam vapour source and turbine shaft leak sealing vapour vapour source, an a kind of vapour source of porous exhaust stack correspondence；
In Fig. 1, it is provided with hydrophobic porous shower between two adjacent porous tanks 3 of the superiors；Then according to
It is secondary downwards, set between adjacent porous tank 3 gland packing leakage porous exhaust stack 5, the porous exhaust stack 6 of cold reheat steam,
The porous exhaust stacks 8 of high-temperature low-pressure steam such as the porous exhaust stack 7 of cold reheat steam, door rod leakage vapour；Simply portion is given in certain Fig. 1
Divide vapour source, it is specific as follows：
Extracted steam from turbine vapour source is the main vapour source of heater, there is provided needed for contact(-type) heater heating deoxygenation condensate
Most heats；
Cold reheat steam source is the auxiliary steam source of heater, steam turbine load is relatively low or unit starting during carry
For steam, to improve the ability of contact(-type) heater thermal de-aeration, meet unit operation feedwater and require；
High-temperature low-pressure steam vapour source includes that shaft seal steam, homophony valve lever leakage vapour, reheating adjust valve lever leakage vapour, steam turbine to mend
Steam valve door rod leakage vapour etc., it is the auxiliary steam source of heater, to improve the ability of contact(-type) heater thermal de-aeration, while reducing
The cold end loss that the overflow steam of high-temperature low-pressure is caused into condenser, improves unit heat economy；
Turbine shaft leak sealing vapour vapour source is the auxiliary steam source of heater, to improve the energy of contact(-type) heater thermal de-aeration
Power, and eliminate that the end of gland heater heat-setting water is poor, the cold end loss that gland packing leakage is caused into condenser is reduced, improve
Unit heat economy.
Under the various operating modes of unit operation being disclosure satisfy that using the hybrid many source of the gas heaters heating deoxygenation boiler feedwaters of low pressure
Feedwater deaeration requirement.
Embodiment 2
Boiler water feeding backheat deaerating type of cycles of the present utility model, mainly includes：Boiler S1；Steam turbine high-pressure cylinder S2；
Intermediate pressure cylinder S3；Low pressure (LP) cylinder S4；Generator S5；Condenser S6；Condensate pump S7；The hybrid many source of the gas heater S8 of low pressure；Two grades
Condensate pump S9；Surface-type mesolow heater S10；Boiler feed pump S11；Regulating valve S12；Voltage stabilizing main pipe S13；It is hydrophobic preposition
Pump S14；External drain cooler S15；Outer steam cooler S16；Relay pump S17；Specific annexation is as follows：
After the outlet series connection condensate pump S7 of condenser S6, the main condensate of many source of the gas heater S8s hybrid with low pressure enters
Mouth 1 is connected, two grades of condensate pump S9 of the series connection of condensation water out 10 and the multistage surface-type of the hybrid many source of the gas heater S8 of low pressure
Mesolow heater S10 connects；Surface-type mesolow heater S10 is connected with boiler feed pump S11 entrances, and described boiler is given
The outlet of water pump S11 is connected with boiler S1, and steam turbine high-pressure cylinder S2, intermediate pressure cylinder S3, low pressure (LP) cylinder S4 have N number of extraction line to take out respectively
Take steam into surface-type mesolow heater S10 heating low-pressure boiler feedwater；Condensed steam enters drain water piping step by step
Flowing, in finally entering the hybrid many source of the gas heater S8 of low pressure.
The utility model replaces surface-type low-pressure heater and gland heaters using the hybrid many source of the gas heaters of low pressure,
The end for eliminating steam turbine water supply heat back system mesolow heating part is poor；Shaft seal steam, homophony valve lever leakage vapour, reheating are adjusted
The overflow steam of the multichannel high-temperature low-pressures such as valve lever leakage vapour, steam turbine filling valve lever leakage vapour introduces the hybrid many sources of the gas of low pressure and adds
Hot device, improves high-temperature low-pressure steam utilization rate, improves unit heat economy.
The position of boiler feed pump is moved to final stage and feeds water by the oxygen-eliminating device outlet port of legacy system in the utility model
Heater (being flowed to by boiler feedwater) outlet, makes steam turbine high-pressure cylinder and corresponding regenerative feed-water pipeline and the valve of drawing gas of intermediate pressure cylinder
Group operating pressure is greatly reduced so that the part feedwater piping and valve group can from mesolow feedwater piping and in it is low
Pressure feed-water valve group, compared with the high-temperature high-pressure apparatus in legacy system, pipeline, valve, system reliability gets a promotion.
The position of boiler feed pump is moved to final stage and feeds water by the oxygen-eliminating device outlet port of legacy system in the utility model
Heater (being flowed to by boiler feedwater) outlet, therefore steam turbine high-pressure cylinder and the corresponding regenerative feed-water equipment of drawing gas of intermediate pressure cylinder, pipe
Road and valve group operating pressure can be according to two grades of mesolow parameter type selectings of solidifying pump discharge.
Specific works mode is：
Steam is flowed out by boiler S1, sequentially enters steam turbine high-pressure cylinder S2, intermediate pressure cylinder S3, low pressure (LP) cylinder S4, promotes steamer
Machine does work, and drives generator S5 to generate electricity, and as exhaust steam, condensation turns into condensate into condenser S6, flows into condensate pump S7
Boosting, into the hybrid many source of the gas heater S8 of low pressure, heated deoxygenation, into two grades of condensate pump S9, after boosting step by step
Surface-type mesolow heater S10 at different levels are flowed through, most circulation is completed through boiler feed pump S11 boosting injection boilers afterwards.In Fig. 2,
B. shaft seal steam, homophony valve lever leakage vapour, reheating adjust the overflow steam such as valve lever leakage vapour, steam turbine filling valve lever leakage vapour；C.
Gland packing leakage；Q. cold reheat steam, is introduced into the hybrid many source of the gas heater S8 of low pressure respectively；
The utility model disclosure satisfy that the operation demand of the various operating mode feedwater deaerations of unit.Low pressure mixing of the present utility model
In many source of the gas heaters of formula, with extracted steam from turbine as unit normal course of operation in feed water heating the main vapour source of deoxygenation；With axle envelope
Steam supply, homophony valve lever leakage vapour, reheating adjust overflow steam and the gland packing leakages such as valve lever leakage vapour, steam turbine filling valve lever leakage vapour
Be feedwater heating deoxygenation auxiliary steam source, with cold reheat steam, be during unit variable load operation process and unit starting to
Water heats the main vapour source of deoxygenation.Compared with traditional single vapour source low-pressure heater, variable load operation ability is significantly increased, and
The operation demand of the various operating mode feedwater deaerations of unit can be met.
In figure 3, exported in final stage surface-type mesolow heater S10, between boiler feed pump S11 entrances, be provided with steady
Pressure main pipe (vacuum tank or water tank of voltage regulation) S13；Voltage stabilizing main pipe (voltage stabilizing can be set in boiler feedwater pump intake in the utility model
Tank or water tank of voltage regulation), when unit operation load fluctuates, voltage stabilizing main pipe (vacuum tank or water tank of voltage regulation) utilizes its water storage energy
Power eliminates the influence that feed pressure is produced in boiler feedwater pump intake to a certain extent.
In fig. 4, the drain water piping of any N number of surface-type low-pressure heater S10 sets hydrophobic fore pump S14；This practicality
Relay pump is set between new middle surface-type low-pressure heater, and low-pressure boiler feedwater segmentation boosting solves low-pressure boiler feedwater
Flow through after surface-type low-pressure heaters at different levels heat up and be likely to occur the problem of vaporization, while solve only being supplied by two grades of condensate pumps
, it is necessary to select two grades of problems of condensate pump of larger lift during water boosting.
In Figure 5, (by hydrophobic direction) sets external drain cooler after any N number of surface-type low-pressure heater S10
S15。
In figure 6, (by direction of drawing gas) sets outer steam cooler before any N number of surface-type low-pressure heater S10
S16。
In the figure 7, relay pump S17 is set between any N number of surface-type low-pressure heater S10.
The utility model can reduce condenser cold end loss, improve high-temperature low-pressure overflow steam utilization.Conventional rack
Draw gas in backheating water feed system, shaft seal steam, homophony valve lever leakage vapour, reheating adjust valve lever leakage vapour, steam turbine filling valve lever
The overflow steam such as leakage vapour are condensed in being introduced directly into condenser, only reclaim working medium, and the heat that it contains is all by recirculated cooling water
Take away, cause cold section of loss.In the utility model, shaft seal steam, homophony valve lever leakage vapour, reheating adjust valve lever leakage vapour, steamer
The overflow steam such as machine filling valve lever leakage vapour are introduced into the hybrid many source of the gas heaters of low pressure, for heating boiler feed water,
Both working medium has been reclaimed, heat has been reclaimed again, reduced cold section of loss for flowing into condenser.
The utility model can improve gland steam utilization rate.Conventional rack is drawn gas in backheating water feed system, gland packing leakage
Exchanged heat with condensate into surface-type gland heater, with larger heat exchange difference, after the completion of heat exchange, the axle that band has surplus heat
Gland steam is entered in condenser and condensed, and reclaims working medium, but lose partial heat.Gland packing leakage is introduced into low in the utility model
Press in hybrid many source of the gas heaters, the net quantity of heat that it contains is used for heat-setting water, and utilization rate is improved.
The utility model can cancel oxygen-eliminating device.The hybrid many source of the gas heaters of low pressure used in the utility model have
Feedwater heating deoxygenation function, its feedwater deaeration effect can cross the operation demand for meeting the various operating mode feedwater deaerations of unit.Therefore, may be used
Oxygen-eliminating device is generally used in existing system to cancel.
It is not new to this practicality although above-mentioned be described with reference to accompanying drawing to specific embodiment of the present utility model
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Various modifications or deform still in protection model of the present utility model that field technique personnel make by need not paying creative work
Within enclosing.
Claims (10)
1. the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of a kind of use low pressure, it is characterised in that：Including low
Pressing hybrid many source of the gas heaters, the hybrid many source of the gas heaters of described low pressure includes housing, is set in described case top
There is main condensate entrance, bottom is provided with condensation water out, multiple porous tanks, described multiple are provided with described enclosure interior
Porous tank is arranged in order from top to bottom in housing, and porous exhaust stack is provided between adjacent porous tank, and multiple
It is porous
The different vapour source of exhaust stack correspondence.
2. the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of a kind of use low pressure, it is characterised in that：Including low
Hybrid many source of the gas heaters, the hybrid many source of the gas heaters of described low pressure, including housing are pressed, is set in described case top
There is main condensate entrance, bottom is provided with condensation water out, the top in described housing is provided with multiple water successively from top to bottom
The porous tank of flat raft row, the bottom in described housing is provided with multiple porous exhaust stacks horizontally arranged successively from top to bottom,
And multiple corresponding different vapour sources of porous exhaust stack.
3. as claimed in claim 1 or 2 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, its
It is characterised by：Described porous exhaust stack is arranged in the vapour side space in the hybrid many source of the gas heaters of low pressure, or is arranged in
The hybrid many source of the gas heater reclaimed water side spaces of low pressure.
4. as claimed in claim 1 or 2 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, its
It is characterised by：The described corresponding vapour source of multiple porous exhaust stack includes extracted steam from turbine vapour source, cold reheat steam source, height
Warm low-pressure steam vapour source and turbine shaft leak sealing vapour vapour source, an a kind of vapour source of porous exhaust stack correspondence.
5. as claimed in claim 1 or 2 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, its
It is characterised by：The entrance of the hybrid many source of the gas heaters of described low pressure is connected with condenser, the hybrid many gas of described low pressure
The outlet of source heater is connected with surface-type mesolow heater.
6., as claimed in claim 5 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, it is special
Levy and be：Described surface-type mesolow heater includes multiple, and multiple surface-type mesolow heaters are sequentially connected in series, and are formed
Multi-stage heating；And the outlet of final stage feed-water heater is connected with the entrance of boiler feed pump.
7., as claimed in claim 6 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, it is special
Levy and be：Relay pump is in series between adjacent surface-type mesolow heater.
8., as claimed in claim 6 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, it is special
Levy and be：Flowed to by boiler feedwater, the boiler feed pump of the feed water system of boiler is arranged in final stage surface-type mesolow heater and goes out
Mouthful.
9., as claimed in claim 6 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, it is special
Levy and be：The entrance of described boiler feed pump is also in series with stable-pressure device.
10., as claimed in claim 9 using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure, it is special
Levy and be：Described stable-pressure device is voltage stabilizing main pipe, vacuum tank or water tank of voltage regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620986588.7U CN206207395U (en) | 2016-08-30 | 2016-08-30 | Using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620986588.7U CN206207395U (en) | 2016-08-30 | 2016-08-30 | Using the boiler feedwater backheat deaerating type of cycles of the hybrid many source of the gas heaters of low pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620951A (en) * | 2017-06-08 | 2018-01-23 | 孔泽学 | New Low Voltage heat regenerative system and heat regenerating method |
-
2016
- 2016-08-30 CN CN201620986588.7U patent/CN206207395U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620951A (en) * | 2017-06-08 | 2018-01-23 | 孔泽学 | New Low Voltage heat regenerative system and heat regenerating method |
| CN107620951B (en) * | 2017-06-08 | 2018-06-19 | 孔泽学 | New Low Voltage heat regenerative system and heat regenerating method |
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