CN110307734A - A kind of vacuum pump working solution circulating system - Google Patents
A kind of vacuum pump working solution circulating system Download PDFInfo
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- CN110307734A CN110307734A CN201910458544.5A CN201910458544A CN110307734A CN 110307734 A CN110307734 A CN 110307734A CN 201910458544 A CN201910458544 A CN 201910458544A CN 110307734 A CN110307734 A CN 110307734A
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- water
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- valve
- circulating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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Abstract
The present invention relates to a kind of vacuum pump working solution circulating systems, belong to thermal power plant steam-water pipe System design technology field.A kind of vacuum pump working solution circulating system, including the water-ring vacuum pump with air inlet and with the steam-water separator of exhaust outlet, the liquid outlet of water-ring vacuum pump is connected to gas-liquid separator, and the outer discharge pipe of the working solution of gas-liquid separator is connected to after passing through heat exchanger with the inlet of water-ring vacuum pump；The outer discharge pipe of working solution is divided into hot water section and cold water section by heat exchanger, and setting valve is connected to setting moisturizing branch one between valve one and water-ring vacuum pump together in cold water section, and connection is set as the moisturizing branch two of condenser water replenishing on hot water section.The present invention passes through the cooperation of moisturizing branch one and moisturizing branch two and the control of each valve, it can be according to the variation of seasonal temperature, the working condition of control loop system enables water-ring vacuum pump to all have good cooling effect in each season, safely and efficiently runs.
Description
Technical field
The present invention relates to a kind of vacuum pump working solution circulating systems, belong to thermal power plant steam-water pipe System design technology
Field.
Background technique
Water-ring vacuum pump, which is able to carry out, to be vacuumized, simple, the operation is stable and low power consumption and other advantages by its structure, big
It gradually popularizes and comes in medium-sized generating set, while stable, maintenance facilitates, also achieve good economic benefit.
The condenser vacuum system of thermal power plant is used to that condenser to be made to keep centainly true in unit starting and operational process
Reciprocal of duty cycle plays an important role in condensing turbine group.As the core of vacuum system, vacuum pump is for extracting condenser
The incondensable gas that internal leakage or working medium carry, strengthens the condensation effect of steam.
In conventional condenser vacuum system, the working solution of vacuum pump is enclosed demineralized water, and the cooling of working solution is logical
Heat exchanger is crossed to complete using open type cooling water.But due to the factors such as cooling water temperature height and heat exchange area deficiency, cooling effect becomes
Difference, especially in summer, the actual temperature of vacuum pump fluid is much higher than design temperature, the saturation temperature even more than under corresponding pressure
Degree causes vacuum pump power output not enough, and vacuum pump cavitation scale formation, so that condenser vacuum declines, unit output is reduced, sternly
The safe operation of economy of power plant and vacuum pump is affected again.
Summary of the invention
The object of the present invention is to provide a kind of vacuum pump working solution circulating systems, to solve above-mentioned technical problem.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of vacuum pump working solution circulating system, including the water-ring vacuum pump with air inlet and with the carbonated drink of exhaust outlet
The liquid outlet of separator, water-ring vacuum pump is connected to gas-liquid separator, and the outer discharge pipe of the working solution of gas-liquid separator, which passes through, to be changed
It is connected to after hot device with the inlet of water-ring vacuum pump；The outer discharge pipe of working solution is divided into hot water section and cold water section by heat exchanger, cold
Valve is set in water section and is connected to setting moisturizing branch one between valve one and water-ring vacuum pump together, is connected to and sets on hot water section
It is set to the moisturizing branch two of condenser water replenishing.
Technical solution of the present invention further improvement lies in that: on moisturizing branch one be arranged control valve group.
Technical solution of the present invention further improvement lies in that: control valve group include be sequentially connected in series isolating valve one, regulating valve
With isolating valve two.
Technical solution of the present invention further improvement lies in that: control valve group further includes being attempted by isolating valve one and isolating valve
The isolating valve three in two outsides.
Technical solution of the present invention further improvement lies in that: set on hot water section's pipeline between valve one and moisturizing branch one
Set check valves.
Technical solution of the present invention further improvement lies in that: isolating valve four and water seal are set gradually on moisturizing branch two.
Technical solution of the present invention further improvement lies in that: water seal be three-level water seal.
Technical solution of the present invention further improvement lies in that: the height of every grade of water seal is consistent.
Technical solution of the present invention further improvement lies in that: moisturizing branch one uses demineralized water as water source.
Technical solution of the present invention further improvement lies in that: between moisturizing branch two and heat exchanger be arranged valve two.
By adopting the above-described technical solution, the technical effect that the present invention obtains has:
The present invention is provided with moisturizing branch one and moisturizing branch two, at the same be provided on two moisturizing branch roads multiple valves into
Row control is regulated and controled by the cooperation of valve, which can carry out the supplement of working solution in time, additionally it is possible to according to seasonal temperature
Variation controls the working condition of the switching circulatory system timely and conveniently, water-ring vacuum pump is enable to all have in each season
Good cooling effect, to safely and efficiently run.
Control valve group in the present invention on moisturizing branch one includes the isolating valve and simultaneously an of regulating valve and two sides
The isolating valve connect, regulating valve can be adjusted into the flow of the supplement working solution of the circulatory system, and other three isolating valves can
Guarantee the safe operation of moisturizing branch one.
Use demineralized water as water source in the present invention.Demineralized water water temperature is lower and degree of purity is high, as vacuum pump
Working solution use, the operation of vacuum pump is more advantageous to from the point of view of water quality and water temperature.
The present invention is provided with water seal on moisturizing branch two, and for protecting the vacuum of condenser, which can be effectively sharp
Meet the working environment of water-ring vacuum pump with the low temperature of industrial moisturizing, additionally it is possible to it is effectively prevent water-ring vacuum pump cavitation,
Back pressure of condenser is reduced simultaneously, that is, obtains the safe operation that good economy also ensures subsidiary engine.
System Working Principle of the invention is simple, easy switching, flexible operation.System high efficiency energy conservation, securely and reliably；Through
It helps practical, comprehensive service performance is good.
Detailed description of the invention
Fig. 1 is vacuum pump working solution circulating system schematic diagram of the present invention；
Wherein, 1, isolating valve one, 2, regulating valve, 3, isolating valve two, 4, isolating valve three, 5, check valves, 6, valve one, 7, valve
Two, 8, isolating valve four, 9, water seal, 10, water-ring vacuum pump, 11, moisturizing branch one, 12, moisturizing branch two, 13, hot water section,
14, cold water section, 15, heat exchanger, 16, cooling water inlet, 17, cooling water outlet, 18, steam-water separator.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described in further details the present invention:
The invention discloses a kind of vacuum pump working solution circulating systems, are specifically followed using the working solution of water-ring vacuum pump
Loop system, the system are mainly used in the condensing heat exchange of power plant steam.Here is specific embodiment:
The present invention is a kind of vacuum pump working solution circulating system, is based on water-ring vacuum pump and steam-water separator and condenser
The circulatory system.Water-ring vacuum pump 10 therein has air inlet, and steam-water separator 18 has exhaust outlet.It is true in liquid-ring type
The liquid outlet of sky pump 10 is connected to by pipeline with steam-water separator 18, and the working solution of 10 outlet of water-ring vacuum pump is first into
Steam-water separator 18 carries out steam-water separation.The outer discharge pipe of the connection setting working solution of steam-water separator 18, for discharging work outward
Liquid.The outer discharge pipe of working solution is connected to after passing through heat exchanger 15 with the inlet of water-ring vacuum pump 10, is carried out by heat exchanger 15
The cooling of working solution is realized in heat exchange.It is constantly recycled in working solution circulating system, working solution is from 10 row of water-ring vacuum pump
After out, steam-water separation is carried out in steam-water separator 18, is then discharged from the liquid outlet of steam-water separator 18 and is back to by pipeline
In water water-ring vacuum pump 10.
The outer discharge pipe of working solution passes through heat exchanger 15 and carries out heat exchange, and cooling water inlet 16 and cooling is arranged in heat exchanger 15
Water out 17, for providing cooling water for heat exchanger 15.Discharge pipe outside working solution is divided into hot water section 13 and cold by heat exchanger 15
Water section 14.Valve 1 is set in cold water section 14 and is connected to setting moisturizing branch between valve 1 and water-ring vacuum pump 10
One 11, the moisturizing branch 1 being arranged at this is mainly used for supplementing working solution for water-ring vacuum pump 10.In hot water section 13
Upper to be connected to the moisturizing branch 2 12 for being set as condenser water replenishing, the moisturizing branch 2 12 being arranged at this cooperates with moisturizing branch 1
For condenser water replenishing.The water inlet of moisturizing branch 1 is arranged in the moisturizing import of the system.
Improvement of the invention also resides in, and is provided with control valve group on moisturizing branch 1 to regulate and control from moisturizing branch one
11 enter the working solution of system.Preferentially, control valve group includes being sequentially connected in series isolating valve 1, regulating valve 2 and isolating valve two
3, above three valve is set gradually from the water inlet of moisturizing branch 1 along the current method of working solution.Further, it controls
Valve group further includes the isolating valve 34 for being attempted by 23 outside of isolating valve 1 and isolating valve.It is specific as shown in Figure 1.Isolating valve 1
Regulating valve 2 can be kept apart with isolating valve 23, especially carried out when regulating valve 2 is overhauled using.Isolating valve 34 is
It is arranged in bypass, and in the maintenance for emergency or regulating valve 2, is closed by isolating valve 1 and isolating valve 23
After closing, isolating valve 34 is opened, moisturizing branch 1 can be from bypassing into the circulatory system where isolating valve 34.
The present invention is in use, appropriate industrial moisturizing is connected into moisturizing branch 1 directly as working solution, thus real
Now working solution is supplemented for the circulatory system.
The moisturizing branch 2 12 that the present invention is also provided with as condenser water replenishing particularly separates benefit on hot water section 13
Water branch 2 12, sets gradually isolating valve 48 and water seal 9 on moisturizing branch 2 12, and the liquid outlet of moisturizing branch 2 12 passes through
Pipeline is to condenser water replenishing mouth.Water seal 9 is used to protect the vacuum of condenser, and the low temperature that can efficiently use industrial moisturizing in this way comes
The working environment for meeting water-ring vacuum pump effectively prevents the cavitation of water-ring vacuum pump, reduces back pressure of condenser, that is, obtains
Obtained the safe operation that good economy also ensures subsidiary engine.In specific implement, water seal 9 is preferentially set as tertiary effluent
Envelope, and the height of every grade of water seal is consistent.Further, for the ease of the control to moisturizing branch 2 12, in moisturizing branch two
Valve 27 is set between 12 and heat exchanger 15.
Water seal height calculates as follows:
By taking certain engineering as an example: back pressure of condenser 0.012MPa(a)；Steam-water separator operating pressure is 0.1MPa(a)；
Condenser and steam-water separator pressure difference: Δ P=0.1-0.012=0.088MPa(a)=8.8mH2O；
Steam-water separator height of water level: 0.5m；Condenser interface absolute altitude: 0.0m；
Height difference between steam-water separator water level and condenser interface: the mH of Δ H=0.5-0.0=0.52O；
Consider pipeline crushing R about 1.5mH2O(estimation, calculates according to practical pipe arrangement)；
Multilevel water seal height: H=Δ H+ Δ P-R=0.5+8.8-1.5=7.8m；
The engineering water seal total height is 7.8m, and using 3 grades of water tight fashions, every grade of height takes 2.6m.
The present invention at work, when summer water-ring vacuum pump working solution temperature is more than permissible value, opens isolating valve one
1, regulating valve 2 and isolating valve 23 are passed through in vacuum pump using industrial moisturizing as working solution, close valve 1, cut off former work
Liquid circulation, and valve 2 is controlled to adjust according to the pressure of the working solution of water-ring vacuum pump 10 and 18 height of water level of steam-water separator
Aperture works normally entire working solution circulating system.Isolating valve 48 is then turned on, closes valve 27, working solution is through three-level
Condenser water replenishing mouth is accessed after water seal 9.It can be according to the actual temperature and industry rate of water make-up of vacuum pump fluid at other seasons
To control to adjust valve opening.Since industrial supplementing water pressure is larger, to prevent working solution from flowing backwards, check-valves 5 is added, makes industrial moisturizing
Forward flow is merely able to enter in water-ring vacuum pump 10.It is particularly cold between valve 1 and moisturizing branch 1
Check valves 5 are set on 14 pipeline of water section.
For the present invention when carrying out working solution supplement, the working solution of supplement preferentially uses demineralized water, i.e. moisturizing branch 1 makes
Use demineralized water as water source.Demineralized water water temperature is lower, and about 20~25 DEG C of summer, winter is lower, if as vacuum pump
Working solution uses, and the operation of vacuum pump is more advantageous to from the point of view of water quality and water temperature.
The present invention is to be directly entered a part of water of extraction steam for factories chemistry moisturizing in vacuum pump as working solution to work, with
Condenser water replenishing is entered back by a water seal afterwards.
Present invention design, directly as the working solution of vacuum pump, passes through control valve group using industrial moisturizing needed for unit
The pressure and flow into vacuum pump can be controlled, open type work system is formed.Condenser is then entered back by a water seal
Carry out moisturizing.The system uses inside and outside cooling+circulatory system, and summer uses moisturizing once-through cycle, other seasons can be according to vacuum
Pump fluid actual temperature is cooling using conventional open type cooling water closed, easy switching, flexible operation.The interior cooling of the system
The mainly heat exchange cooling effect of heat exchanger, outer cooling are primarily referred to as the supplement of the low industrial liquid (demineralized water) of temperature.Interior cooling
With outer cooling cooperation with the circulatory system, collective effect can be improved cooling effect, and according to the temperature conditions in each season into
The more flexible adjusting of row.
The present invention is suitable for the circulatory system based on water-ring vacuum pump, and the present invention passes through two moisturizing branches of setting,
The two cooperates while realizing the moisturizing for the circulatory system and the moisturizing for condenser.
The method that the present invention increases control valve group by introducing portion industry moisturizing and in original pipeline, substantially reduces
The running temperature and operating pressure of water-ring vacuum pump working solution reduce to ensure that the power output of water-ring vacuum pump
The back pressure of unit, improves economic benefit.The system is beneficial to prevent water-ring vacuum pump cavitation.Design improvement cost of the present invention
It is few, high efficiency is returned, structure is simple, and reliable for operation and flexibility is high.
Claims (10)
1. a kind of vacuum pump working solution circulating system including the water-ring vacuum pump (10) with air inlet and has exhaust outlet
Steam-water separator (18), it is characterised in that: the liquid outlet of water-ring vacuum pump (10) is connected to gas-liquid separator (18), gas-liquid
The outer discharge pipe of the working solution of separator (18) passes through heat exchanger (15) and is connected to afterwards with the inlet of water-ring vacuum pump (10)；Work
The outer discharge pipe of liquid is divided into hot water section (13) and cold water section (14) by heat exchanger (15), and valve one (6) are arranged simultaneously in cold water section (14)
It is connected to setting moisturizing branch one (11) between valve one (6) and water-ring vacuum pump (10), is connected to setting on hot water section (13)
For the moisturizing branch two (12) of condenser water replenishing.
2. a kind of vacuum pump working solution circulating system according to claim 1, it is characterised in that: on moisturizing branch one (11)
Control valve group is set.
3. a kind of vacuum pump working solution circulating system according to claim 2, it is characterised in that: control valve group include according to
Secondary concatenation isolating valve one (1), regulating valve (2) and isolating valve two (3).
4. a kind of vacuum pump working solution circulating system according to claim 3, it is characterised in that: control valve group further includes
The isolating valve three (4) being attempted by the outside of isolating valve one (1) and isolating valve two (3).
5. a kind of vacuum pump working solution circulating system according to any one of claims 1 to 4, it is characterised in that: valve one
(6) check valves (5) are set on the hot water section between moisturizing branch one (11) (13) pipeline.
6. a kind of vacuum pump working solution circulating system according to claim 1, it is characterised in that: on moisturizing branch two (12)
Set gradually isolating valve four (8) and water seal (9).
7. a kind of vacuum pump working solution circulating system according to claim 6, it is characterised in that: water seal (9) is tertiary effluent
Envelope.
8. a kind of vacuum pump working solution circulating system according to claim 7, it is characterised in that: the height one of every grade of water seal
It causes.
9. a kind of vacuum pump working solution circulating system according to claim 1, it is characterised in that: moisturizing branch one (11) makes
Use demineralized water as water source.
10. a kind of vacuum pump working solution circulating system according to claim 1, it is characterised in that: moisturizing branch two (12)
Valve two (7) are set between heat exchanger (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910458544.5A CN110307734A (en) | 2019-05-29 | 2019-05-29 | A kind of vacuum pump working solution circulating system |
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| CN201910458544.5A CN110307734A (en) | 2019-05-29 | 2019-05-29 | A kind of vacuum pump working solution circulating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926231A (en) * | 2019-12-10 | 2020-03-27 | 国网河北省电力有限公司电力科学研究院 | High-efficient air cooling system |
| CN111828321A (en) * | 2020-06-16 | 2020-10-27 | 华电电力科学研究院有限公司 | Working liquid cooling method for effectively improving working efficiency of vacuum pump |
| CN112344215A (en) * | 2020-09-18 | 2021-02-09 | 南通新金丰皮革机械有限公司 | Vacuum system liquid feeding device for leather |
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| CN112344215A (en) * | 2020-09-18 | 2021-02-09 | 南通新金丰皮革机械有限公司 | Vacuum system liquid feeding device for leather |
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