CN206018778U - A kind of steam turbine coarse vacuum circulating water heating system - Google Patents
A kind of steam turbine coarse vacuum circulating water heating system Download PDFInfo
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- CN206018778U CN206018778U CN201621033823.5U CN201621033823U CN206018778U CN 206018778 U CN206018778 U CN 206018778U CN 201621033823 U CN201621033823 U CN 201621033823U CN 206018778 U CN206018778 U CN 206018778U
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- water
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- condenser
- heating system
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Abstract
The utility model discloses a kind of steam turbine coarse vacuum circulating water heating system of vapour, belongs to field of generating equipment.A kind of steam turbine coarse vacuum circulating water heating system, including cooling tower, cooling tower water pipeline enters condenser by water circulating pump, Turbo-generator Set is powered to condenser, condenser water outlet enters heat user by inlet channel after entering pumps for hot water supply net, heat user backwater is connected in water circulating pump pipeline by water return pipeline, it is recycled into cooling tower, peak load calorifier is parallel between pumps for hot water supply net and heat user, peak load calorifier is connected with external steam pipeline, is provided with ball cleaning apparatus in condenser.Scale problems were reduced than in the past, and the quality of water improves a lot.It can realize that energy consumption is low, can prevent the effect of fouling, and delivery temperature is high, and cyclic utilization rate is high.
Description
Technical field
This utility model is related to field of generating equipment, more particularly, it relates to a kind of steam turbine coarse vacuum circulating water heating
System.
Background technology
With country《Energy law》Issuing and implementation and world energy sources worsening shortages, the energy conservation of enterprise seems more next
More important.One steam power plant, the integrated heat efficiency in factory are only 30%～40%, and other heats lost in vain, and its
Middle maximum be exactly condenser cold source energy, account for the 60% of total losses.How to reduce cold source energy, improve full factory's thermal effect
Rate, the purpose that energy-conservation is taped the latent power is reached, be problem anxious to be resolved at present.
In recent years, electricity power enterprise is intended to reduce station service power consumption rate, improves electricity volume, to increase the performance of enterprises, by feed pump
Driving is changed to be driven by small turbine, drives vapour source typically to have four sections of steam turbine supplies of drawing gas, and in addition cold steam again is used as standby
With small turbine drives feed pump or air-introduced machine, its steam discharge to be condensed by condenser system, and condensate is suppressed by booster and is back to master
Machine heat regenerative system.Wet type cooling unit condenser condensing capacity is rich, and feed-water pump turbine steam discharge can be directly discharged into main frame and coagulate
Vapour device system, but air-introduced machine driving steam turbine is because remote (about 30m) apart from main frame condenser distance, because the reasons such as flow resistance unsuitable
Steam discharge is introduced main frame condenser system, condenser system need to be set on the spot.Also there is minority and drove feed pump in Air-cooled Unit
Turbine discharge is directly discharged into main frame air condenser system, but because main frame air condenser system cooling capacity is poor, as a result goes out
Existing driving steam turbine operation back pressure is too high, the phenomenon of poor performance；Additionally, the same with wet type cooling unit, air-introduced machine driving steam turbine is arranged
Vapour also will arrange condenser system on the spot.In brief, the air-introduced machine driving steam turbine of wet type cooling unit, the feed pump of Air-cooled Unit drive
Dynamic steam turbine and air-introduced machine driving steam turbine, are required for individually arranging condenser system, the condensed system for now just occurring at present on the spot
System form and feature are briefly discussed below：
1) the clammy condenser system of the spike of the clammy condenser form of reference, this are the basic of driving steam turbine steam discharge condensation
Form.Surface condenser of the clammy condenser of spike similar to wet type cooling unit, flows through recirculated cooling water in cooling tube bundle, tube bank
Driving steam turbine steam discharge is flowed through outward, both exchange heat steam discharge condensation, the boosted pump of condensed condensate is back to main frame after suppressing
Heat regenerative system, the recirculated cooling water after intensification are back to cooling device and are cooled down.Wherein, recirculated cooling water can be by power plant's open type
Water (or main frame recirculated cooling water, it is only limitted to wet type cooling unit) supply, the cooling system of its cooling water can be showing for wet type cooling unit
Some cooling tower (recirculated cooling water takes from main frame recirculating cooling water system, is only limitted to wet type cooling unit), newly-built machine power tower (air cooling
Unit wet type cooling unit all can), newly-built indirect dry cooling tower (Air-cooled Unit wet type cooling unit all can)；It can also be main frame condenser
Condensate, after condensate pump, which enters the clammy condenser of surface-type and driving steam turbine steam discharge as recirculated cooling water
Heat exchange, is back to main frame heat regenerative system after heat absorption.
Recirculated cooling water takes from opened water (or main frame recirculated cooling water, be only limitted to wet type cooling unit), and advantage is condensation effect
Preferably, driving steam turbine operation back pressure is relatively low, better economy；Have the disadvantage to be both needed to arrange as wet type cooling unit cold end system
System, mainly includes condenser, pumped vacuum systems, recirculating cooling water system, the cooling system of recirculated cooling water, condensation water system
System, water circulating pump, condensate booster pump, various valves and pipeline, system complex are invested huge.More importantly go into operation
Generating set, ten parts of plant area space are limited, to arrange so complicated system, an actually difficult problem for power plant.
Recirculated cooling water takes from main frame condensate, and advantage is omitted circulating cooling water cooling system, only need to arrange condensing
Device, pumped vacuum systems, condensate system；Have the disadvantage that main frame condensate own temperature is high, cause driving steam turbine exhaust steam pressure high,
Economy is poor.
2) the spike dry type condenser system of air cooling tubes condenser is used for reference.Spike dry type condenser system is similar to Direct Air-Cooled
Condenser, arranges spike dry type condenser near driving steam turbine, and the pressure air produced by axial flow blower flows through condenser
Outside, with the steam discharge heat convection flowed through inside condenser, is back to main frame backheat system after suppressing through booster after exhaust steam condensation
System.The same with direct air cooled condenser, area of dissipation is huge so as to floor space greatly, and site layout project becomes a difficult problem；Additionally, dry type
Condenser heat-sinking capability difference causes driving steam turbine exhaust steam pressure high, and both comprehensively cause the spike dry type condenser system application
Have difficulties.
In sum, for the generating set of operation, motorized motions are changed to the existing steam turbine row of steam-operating driving
Or vapour condensation technology is present, system complex, floor space are big, initial cost is big, maintenance workload is big, or there is condensation effect
Poor, less economical problem.
Chinese patent application, application number 201510250338.7, publication date August in 2015 26 days, disclosing one kind is used for
The evaporative condenser system of thermal power plant's small turbine exhaust steam condensation, high pressure cylinder, intermediate pressure cylinder including Direct Air-cooled Unit, low pressure
Cylinder, driving steam turbine and condenser；The steam drain of small turbine is connected to the steaming for condensing small steam turbine exhaust steam by pipeline
Hairdo condenser, the condensation water out of evaporative condenser connect condensate main pipe, and boosted blowback flow to main frame heat regenerative system.This
Invention system is simple, floor space is little, be particularly suited for going into operation unit feed pump or air-introduced machine be changed to by motor-driven little
The steam discharge condensation of Steam Turbine Driven.Initial investment of the present invention is less, and environmental suitability is high, and heat transfer coefficient is larger, heat transfer effect
Good；During winter low temperature, can use as direct air cooled condenser, unit water quantity is zero.But this device power consumption is big, condenser copper
Inside pipe wall adheres to, and causes copper pipe fouling, and heat transfer effect is poor.
Content of the invention
1. technical problem to be solved
For energy consumption present in prior art is big, the problem that weakens of easy fouling, time long heat transfer effect, this practicality is newly
Type provides a kind of steam turbine coarse vacuum circulating water heating system.It can realize that energy consumption is low, can prevent the effect of fouling, row
Temperature degree is high, and cyclic utilization rate is high.
2. technical scheme
The purpose of this utility model is achieved through the following technical solutions.
A kind of steam turbine coarse vacuum circulating water heating system, including cooling tower, cooling tower water pipeline is entered by water circulating pump
Enter condenser, Turbo-generator Set is powered to condenser, condenser water outlet passes through inlet channel after entering pumps for hot water supply net
Heat user is entered, heat user backwater is connected in water circulating pump pipeline by water return pipeline, be recycled into cooling tower, heat supply network is circulated
Peak load calorifier is parallel between pump and heat user, and peak load calorifier is connected with external steam pipeline.
Further, described water circulating pump includes that 2 hot water circulating pumps, two hot water circulating pumps reciprocal interlock.
Both mutually standby work, unlatching one or two, energy saving and power, open guarantor simultaneously in peak period as needed
Card workman needs, and low-valley interval keeps in repair stage switching control, it is ensured that operation is continuous, and energy saving.
Further, relief valve is provided with heat user water return pipeline, it is ensured that pressure of return water is less than 0.2MPa.Ensure
Manifold pressure, safety are good.
Further, dirt separator is provided with heat user water return pipeline, it is ensured that the cleaning in pipeline, life-span length, water quality
Good.
Further, non-return valve is provided with heat user water return pipeline.
Further, the system is in parallel with the switching station heating equipment of outside, can be standby each other, switches mutually.Unit
Cause for various reasons to stop transport, then the steam discharge thermal source needed for circulating water heating disappears, circulating water heating does not reach heating requirement,
Therefore the remedial measure being had using back-up system during circulating water heating system failure.
Further, arrange in outside switching station heating equipment a set of softening water treatment facilities, 1 condensate tank and
2 small pumps, dedicated for circulating cooling make-up water, small pump adopts VFC, constant to control supplementing water pressure.
Further, ball cleaning apparatus are provided with described condenser.Scale problems were reduced than in the past, the product of water
Matter improves a lot.
3. beneficial effect
Compared to prior art, the utility model has the advantage of：
(1) this programme solves the problems, such as that cooling tower cooling effect is bad, and recirculated water is prevented using more clean softened water
In the problem of condenser copper tube encrustation, the exhaust temperature of group itself is high, relative using exhaust temperature after circulating water heating
Other units improve less, and the impact to unit is little；
(2) by reducing temperature, the method for increasing flow meets heating demand to this programme, and energy consumption is low, life-span length, unit
Safety is good；
(3) water circulating pump includes that 2 hot water circulating pumps, two hot water circulating pumps reciprocal interlock.Both mutually standby works
Make, as needed unlatching one or two, energy saving and power, opened in peak period simultaneously and ensure that workman needs, low
Paddy period or maintenance stage switching control, it is ensured that operation is continuous, and energy saving；
(4) relief valve is provided with heat user water return pipeline, it is ensured that pressure of return water is less than 0.2MPa.Ensure that pipeline is intrinsic pressure
Power, safety are good；
(5) the system is in parallel with the switching station heating equipment of outside, can be standby each other, switches mutually.Unit is due to a variety of
Reason causes to stop transport, then the steam discharge thermal source needed for circulating water heating disappears, and circulating water heating does not reach heating requirement, therefore adopts
Back-up system has remedial measure during circulating water heating system failure；
(6) ball cleaning apparatus are provided with condenser, and scale problems were reduced than in the past, and the quality of water improves a lot.
Description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Label declaration in figure：
1st, cooling tower；2nd, water circulating pump；3rd, condenser；4th, Turbo-generator Set；5th, pumps for hot water supply net；6th, spike heating
Device；7th, heat user.
Specific embodiment
With reference to Figure of description and specific embodiment, this utility model is described in detail.
Embodiment 1
As shown in figure 1, a kind of steam turbine coarse vacuum circulating water heating system, passes through including 1 cooling tower of cooling tower, 1 water lines
Water circulating pump 2 enters condenser 3, and Turbo-generator Set 4 is powered to condenser 3, and 3 water outlet of condenser enters pumps for hot water supply net
Heat user 7 is entered by inlet channel after 5,7 backwater of heat user is connected in 2 pipeline of water circulating pump by water return pipeline, circulated
Cooling tower 1 is entered, peak load calorifier 6, peak load calorifier 6 and external steam pipe between pumps for hot water supply net 5 and heat user 7, is parallel with
Road is connected.Circulating water temperature can will can be heated to more than 60 DEG C by this programme, although supply water temperature is not high, adopt low temperature
The method of degree big flow, can meet the demand of winter heating.
Embodiment 2
Embodiment 2 is substantially the same manner as Example 1, is with part, as unit improves exhaust temperature, reduces condenser 3
Vacuum, changing the water circulating pump 2 described in the designed breeding of unit includes 2 hot water circulating pumps, two hot water circuit
Pump reciprocal interlocks.Relief valve is provided with 7 water return pipeline of heat user, it is ensured that pressure of return water is less than 0.2MPa, 7 backwater of heat user
Dirt separator is provided with pipeline, is provided with non-return valve on 7 water return pipeline of heat user.Such scheme is arranged, it is ensured that pressure of return water,
The special circumstances such as the unexpected off-the-line of prevention heat supply network.
Embodiment 3
Embodiment 3 is substantially the same manner as Example 1, is with part, if unit causes to stop transport for various reasons, follows
Steam discharge thermal source needed for ring water heat supply disappears, and circulating water heating does not reach heating requirement, it is therefore necessary to have circulating water heating system
Remedial measure during failure, the system are in parallel with the switching station heating equipment of outside, can be standby each other, switch mutually.Will circulation
Pump capacity is increased, and power increases, and lift is improved.Before unit starting, heat supply is carried out using switching station heating system；Unit is normal
After load carrying, then gradually it is switched in circulating water heating system.Unit recirculated water temperature rise in underrun reduces, no
When can guarantee that heating demands, need to carry out secondary supplement heating using heat-exchange apparatus in switching station to system, to reach heating
The temperature requirement in the network of rivers.Return water temperature is raised, it is impossible to when meeting unit condensation needs, the method switched using standby heat user,
The user that former heat exchange station heats is switched to circulating water heating system；This certain customers is switched back into original again after mercury dropped
Heat exchange station, to ensure unit output, while retaining former cooling tower systems, part recirculated water can also pass into the circulation of cooling tower 1
Loop is cooled down.
Embodiment 4
Embodiment 4 is substantially the same manner as Example 3, is with part, and circulation water for heating adopts softened water, outside switching station
A set of softening water treatment facilities, 1 condensate tank and 2 small pumps are set in heating equipment, dedicated for circulating cooling make-up water, are mended
Water pump adopts VFC, constant to control supplementing water pressure.
Embodiment 5
Embodiment 5 is substantially the same manner as Example 1, is with part, although exhaust temperature raises the fouling for easily causing copper pipe,
But this programme heat supply network recirculated water adopts chemical-treated softened water, and hardness reduces and water return pipeline has dirt separator, the quality of water
Improve a lot, ball cleaning apparatus are provided with described condenser 3, periodically condenser are carried out clearly with ball cleaning apparatus
Wash.For the circulation aqueous condition of the former machine, situation is substantially improved, and scale problems were reduced than in the past.
Embodiment 6
It is embodied as application as follows, the crew qiting of steam power plant is 9 stove, 6 machine, ability of always steaming is 530t/h, generating capacity
For 36MW.Using circulating water heating, need to carry out in extraction and condensing unit.The factory has 3 extraction and condensing units, and wherein one 6MW takes out solidifying
Unit is cooled down using 3 table glass steel cooling towers 1, and due to due to design attitude at that time, plash and film-cooled heat are less than normal,
Cooling effect does not inherently reach design requirement, and the regional water quality hardness residing for the factory is very big, is located on kerbside again,
Operation will deposit substantial amounts of dust and dirt soon in tower, the Severe blockage gap of filler, cause current not smooth, it is necessary to use
3 Fans carry out continuously forced ventilation, consume substantial amounts of electric energy.Even so, generally circulating the water entrance temperature difference
Only 3～5 DEG C.Further, since plash is limited, the soil of the interior deposition of tower, impurity etc. have little time precipitation and return in recirculated water,
These dirts adhere in condenser copper tube inwall, cause copper pipe fouling, and heat transfer effect is poor, and exhaust temperature is raised and (is up to when serious
More than 60 DEG C), form the vicious cycle of heat exchange.In order to solve this problem, the factory every year must be to condenser copper tube and cooling tower
Filler is cleared up, and production cost is improved.If making the unit utilize circulating water heating, one is can to solve to cool down tower cooler effect
Really bad problem；Two is softened water of the recirculated water using more cleaning, it is therefore prevented that in the problem of condenser copper tube encrustation；
Three is the exhaust temperature height of the unit itself, improves less using other units relative of exhaust temperature after circulating water heating, right
The impact of unit is little.Therefore, transformed with this programme in the enterprising enforcement of 6MW extraction and condensing units.
Use, the technical parameter of MW extraction and condensing units
Model：6 35/9 types of CN
Manufacturer：Hangzhou steam turbine generator factory
Design exhaust temperature：36℃
Design exhaust steam pressure：0.005 9MPa
Design vacuum values：- 0.094MPa
Circulating water flow：1 400t/h
Heat supply network supply water temperature：60 DEG C of water supply enthalpies of tg ≈：Hg=251.5kJ/kg
Heat supply network return water temperature：50 DEG C of backwater enthalpies of th ≈：Hh=209.3kJ/kg
Circulating pump motor：37kW 3
Blower fan of cooling tower：30kW 3
Benefit is as follows：Can receive hot expense every year more, 3.3 yuan/(the m2 months) × April/a × 250,000 ten thousand yuan/a of m2=330.Due to
The impact every year electricity produced using circulating water heating：The few generated energy of each Heating Period be 0.6 ten thousand kW h × 8.0 × 24 ×
120=138.24 ten thousand kW h.Disable former 3 water circulating pumps and 3 blower fan of cooling tower consume electricity less for (30 × 3+37 × 3)
Ten thousand kW h of × 24 × 120=57.9.Former heat exchange station heat supply water pump is disabled, it is 37 × 24 × 120=10.7 ten thousand to consume electricity less
kW·h.It is 250 × 24 × 120=72, ten thousand kW h to consume electricity newly-increased circulating pump motor more.Total annual electricity of loss altogether=
138.24-57.9-10.7+72=141.64 ten thousand kW h, per kW h, electricity is calculated by 0.365 yuan, equivalent RMB 141.64 ×
Ten thousand yuan of 0.365=51.7.The difference of steam turbine circulating cooling make-up water amount, original system 1 400 × 4%=56t/h of rate of water make-up, new system are mended
The water yield is 8t/h, and economize on water 48t per h, and each Heating Period operation 120d, water price are calculated by 1 yuan/t, can save fund 48 × 24 every year
Ten thousand yuan of × 120 × 1=13.8.
Comprehensive items factor can increase benefit, ten thousand yuan of 330-51.7+13.8=292.1 every year.This improvement project budgetary estimate
Invest 5,600,000 yuan.2 years payoff periods of this improvement project.
The factory reduces Condensing steam turine vacuum by this programme, improves exhaust temperature, reduces low-temperature receiver using circulating water heating
Loss is low, and transformation is simple, and equipment can be with safe and stable operation, particularly energy-saving effect significantly, and economic benefit is considerable.
Below schematically the invention and embodiments thereof are described, the description do not have restricted, not
In the case of the spirit or essential characteristics of the present invention, the present invention can be realized in other specific forms.Institute in accompanying drawing
Shown is also one of embodiment of the invention, and actual structure is not limited thereto, any attached in claim
Icon note should not limit involved claim.So, if one of ordinary skill in the art is enlightened by which, without departing from
In the case of this creation objective, the frame mode similar to the technical scheme and embodiment is designed without creative, all should
Belong to the protection domain of this patent.Additionally, " an including " word is not excluded for other elements or step, one word of " one " before element
It is not excluded for including " multiple " element.The multiple element that states in claim to a product can also by an element by software or
Person's hardware is realizing.The first, the second grade word is used for representing title, and is not offered as any specific order.
Claims (8)
1. a kind of steam turbine coarse vacuum circulating water heating system, it is characterised in that：Including cooling tower (1), cooling tower (1) water lines
Condenser (3) is entered by water circulating pump (2), Turbo-generator Set (4) is powered to condenser (3), condenser (3) water outlet
Enter pumps for hot water supply net (5) afterwards by inlet channel entrance heat user (7), heat user (7) backwater by water return pipeline connect into
In water circulating pump (2) pipeline, cooling tower (1) is recycled into, spike is parallel between pumps for hot water supply net (5) and heat user (7) and is added
Hot device (6), peak load calorifier (6) are connected with external steam pipeline.
2. a kind of steam turbine coarse vacuum circulating water heating system according to claim 1, it is characterised in that：Described circulation
Water pump (2) includes that 2 hot water circulating pumps, two hot water circulating pumps reciprocal interlock.
3. a kind of steam turbine coarse vacuum circulating water heating system according to claim 1, it is characterised in that：Heat user (7)
Relief valve is provided with water return pipeline, it is ensured that pressure of return water is less than 0.2MPa.
4. a kind of steam turbine coarse vacuum circulating water heating system according to claim 1 or 3, it is characterised in that：Heat user
(7) dirt separator is provided with water return pipeline.
5. a kind of steam turbine coarse vacuum circulating water heating system according to claim 4, it is characterised in that：Heat user (7)
Non-return valve is provided with water return pipeline.
6. a kind of steam turbine coarse vacuum circulating water heating system according to claim 4, it is characterised in that：The system with outer
The switching station heating equipment in portion is in parallel, can be standby each other, switches mutually.
7. a kind of steam turbine coarse vacuum circulating water heating system according to claim 6, it is characterised in that：Outside exchange
Heating equipment of standing is interior to arrange a set of softening water treatment facilities, 1 condensate tank and 2 small pumps, dedicated for circulating cooling make-up water,
Small pump adopts VFC, constant to control supplementing water pressure.
8. a kind of steam turbine coarse vacuum circulating water heating system according to claim 1, it is characterised in that：Described condensing
Ball cleaning apparatus are provided with device (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621033823.5U CN206018778U (en) | 2016-08-31 | 2016-08-31 | A kind of steam turbine coarse vacuum circulating water heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621033823.5U CN206018778U (en) | 2016-08-31 | 2016-08-31 | A kind of steam turbine coarse vacuum circulating water heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206018778U true CN206018778U (en) | 2017-03-15 |
Family
ID=58258640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201621033823.5U Expired - Fee Related CN206018778U (en) | 2016-08-31 | 2016-08-31 | A kind of steam turbine coarse vacuum circulating water heating system |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057205A (en) * | 2018-01-18 | 2019-07-26 | 中国电力工程顾问集团华东电力设计院有限公司 | Box-like cooling water system in a kind of opened water and recirculated water |
-
2016
- 2016-08-31 CN CN201621033823.5U patent/CN206018778U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057205A (en) * | 2018-01-18 | 2019-07-26 | 中国电力工程顾问集团华东电力设计院有限公司 | Box-like cooling water system in a kind of opened water and recirculated water |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |