CN203177688U - Efficient water ring vacuum pump system for condensing steam turbine unit - Google Patents

Efficient water ring vacuum pump system for condensing steam turbine unit Download PDF

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Publication number
CN203177688U
CN203177688U CN 201320054383 CN201320054383U CN203177688U CN 203177688 U CN203177688 U CN 203177688U CN 201320054383 CN201320054383 CN 201320054383 CN 201320054383 U CN201320054383 U CN 201320054383U CN 203177688 U CN203177688 U CN 203177688U
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China
Prior art keywords
heat exchanger
working solution
vacuum pump
water ring
ring vacuum
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Expired - Fee Related
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CN 201320054383
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Chinese (zh)
Inventor
何立波
陈恩鉴
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Beijing Century Benefits Co Ltd
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Beijing Century Benefits Co Ltd
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Priority to CN 201320054383 priority Critical patent/CN203177688U/en
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Abstract

The utility model discloses an efficient water ring vacuum pump system for a condensing steam turbine unit. Under the premise that automatic water adjustment of the water temperature of working liquid is achieved, the size of heat exchange equipment is reduced, the equipment is convenient integrate, refrigeration efficiency of the working liquid is improved at the same time, a water ring vacuum pump is made to be free of the influence of the environment temperature and to reach design output, and the vacuum degree of a condenser is ensured. The system is formed by the water ring vacuum pump, a gas-water separator, a compressor and a compressor control system, a frequency converter, a water-cooled condenser, a thermoelectric couple, a throttle valve, a solenoid valve, a gas heat exchanger, a working liquid heat exchanger, corresponding connecting lines and corresponding valves. Pumped gas and the working liquid are directly cooled by using air conditioning refrigerating fluid, the frequency converting technology is used for adjustment, and under the premise that the advantages of reducing the equipment size, reducing power consumption and improving refrigerating efficiency of the working liquid are achieved, vacuum pumping capacity of the system is ensured.

Description

The efficient water ring vacuum pump system of a kind of condensing turbine group
Technical field
The utility model relates to a kind of improved water ring vacuum pump system, especially for thermal power generation or cogeneration condensing turbine group pumped vacuum systems.
Background technology
The condenser high vacuum state need be set up and keep to thermal power generation or cogeneration condensing turbine group, at present the more and more condenser pumped vacuum systems that are applied to of water ring vacuum pump.The principle of water ring vacuum pump is, when eccentric impeller rotates, working solution is subjected to action of centrifugal force to form the sealing water ring of a rotation at pump housing inwall, the space that blade space chamber and water ring form when impeller rotates a circle each inhale, exhaust once, thereby continuous intake-gas reaches the vacuum requirement.In the condensing turbine group, require condenser vacuum to be higher than 0.008Mpa, water ring vacuum pump is worked under this vacuum, the vaporization that reaches capacity of the easy overtemperature of working solution, vavuum pump is because aspirating the gas that the vaporization of self working solution produces, cause the actual wretched insufficiency of exerting oneself of vavuum pump, and may cause the cavitation of blade to damage.From the bleeding of condenser, the content of water vapour account for the volume of bleeding 50 ~ 60% in addition higher, make the vavuum pump above exhaust capacity that need double just can meet the demands, simultaneously, the temperature of water vapour is about 40 ℃, its with can condense in a large number after working solution mixes, the latent heat after condensing and sensible heat all can make the working solution temperature significantly raise, and increase the possibility of working solution vaporization.
The working solution of water ring vacuum pump design water temperature is 15 ℃, and in order to reach the best effect of bleeding, the most effective way is with air conditioning water cooling work liquid and bleeds at present, with reduction working solution temperature and the steam that condenses and contain in bleeding.Increased intermediate link but utilize chilled water to be equal to, made system complex, efficient low, and chilled water temperature generally is higher than 5 ℃, less with the temperature difference of working solution design temperature, this just require need be bigger heat transmission equipment.
The utility model content
The purpose of this utility model is to provide a kind of condensing turbine group efficient water ring vacuum pump system, realizing under the prerequisite self-regulating to the working solution water temperature, reduce the heat transmission equipment volume, it is integrated to be convenient to equipment, improve the efficient of working solution refrigeration simultaneously, make water ring vacuum pump not be subjected to the influence of environment temperature and reach design rating, guarantee condenser vacuum.
For realizing above purpose, the utility model has been taked following technical scheme: the efficient water ring vacuum pump system of a kind of condensing turbine group comprises water ring vacuum pump, moisture trap, compressor, frequency converter, frequency converter, water-cooled condenser, choke valve, magnetic valve, thermocouple, gas heat exchanger, working solution heat exchanger, corresponding connecting line and valve.
Connect and constitute water ring vacuum pump, moisture trap, working solution heat exchanger, thermocouple, the water ring vacuum pump in working solution closed cycle loop successively, working solution recycles in system; Connect and constitute the compressor of cold-producing medium link circuit successively, water-cooled condenser, choke valve, first magnetic valve, the working solution heat exchanger, second magnetic valve, gas heat exchanger, compressor, draw two branch roads behind the described choke valve, wherein a branch road is connected with the working solution heat exchanger by first magnetic valve, another branch road is connected with gas heat exchanger by second magnetic valve, form air-conditioning refrigerant closed cycle in parallel, the evaporimeter that gas heat exchanger and working solution heat exchanger use as parallel connection absorbs heat, the steam during the condensation condenser is bled and cooling water ring vacuum pump working solution; Also be connected with frequency converter on described compressor, the supporting frequency converter of the compressor of refrigeration plant is according to the signal controlling compressor rotary speed that refrigerant flow changes, and realizes that in parallel the use also of two evaporimeters can control separately; On vacuum exhaust pipe and the working solution circulation pipe gas heat exchanger is set and the working solution heat exchanger cools off, gas heat exchanger and working solution heat exchanger are as the evaporimeter in parallel of refrigeration plant.
Before water ring vacuum pump bleeding point and working solution import thermocouple is installed, the refrigeration plant control system can be regulated refrigerant flow by coolant temperature signal and magnetic valve, controls the refrigeration of evaporimeter in parallel separately, reaches and sets the working solution temperature.
Described water ring vacuum pump bleeding point links to each other with turbine condenser by pipeline, exhaust outlet is connected with moisture trap by pipeline, the working solution of water ring vacuum pump is supplied with by water-head by moisture trap, be characterized on described vacuum exhaust pipe and the working solution supply pipe gas heat exchanger (evaporimeter) being set and working solution heat exchanger (evaporimeter) cools off, described gas heat exchanger and working solution heat exchanger cooling fluid are the cold-producing medium of refrigeration plant.
The above-mentioned efficient water ring vacuum pump system of condensing turbine group, described compressor, water-cooled condenser, choke valve, magnetic valve, gas heat exchanger, working solution heat exchanger and corresponding connecting line form the air-conditioning refrigerant closed cycle, cold-producing medium becomes high temperature and high pressure gas by compressor compresses, in water-cooled condenser, condense into highly pressurised liquid, by the choke valve puffing, enter the evaporation of gas heat exchanger (evaporimeter one) in parallel and working solution heat exchanger (evaporimeter two) respectively and absorb heat, steam during condensation is bled and cooling water ring vacuum pump working solution, the refrigerant gas after the heat absorption is got back to compressor.Described compressor is installed supporting frequency converter and corresponding control system, form the refrigeration plant module with water-cooled condenser and choke valve, thermocouple is installed in water ring pump bleeding point and working solution import, control system is passed through design temperature, the electromagnetic valve switch of control gas heat exchanger and working solution heat exchanger is regulated the flow of cold-producing medium, realize the temperature that refrigeration is set, frequency converter is by the output of the signal controlling compressor refrigerating capacity of changes in flow rate.Described water-cooled condenser uses power station recirculated cooling water cooling.
The above-mentioned efficient water ring vacuum pump system of condensing turbine group, described water ring vacuum pump, moisture trap, working solution heat exchanger and corresponding connecting pipe form the working solution closed circuit.Before the startup, earlier working solution is mended moisture trap and water ring vacuum pump by water pipe, after starting operation, water vapour during condenser is bled is condensed into water by gas heat exchanger and enters water ring vacuum pump, mix with working solution, working solution and on-condensible gas are discharged from water ring pump simultaneously and enter moisture trap, on-condensible gas is by the emptying of moisture trap top, the pull of vacuum of working solution by gravity and water ring pump flows back to water ring vacuum pump and circulates, and working solution more than needed is drained by the overflow pipe of moisture trap.Described working solution pipeline is installed thermocouple temperature measurement before entering water ring vacuum pump, and signal is sent refrigeration control system back to, regulates 15 ℃ that the working solution temperature maintenance is set.
The utility model compared with prior art has following advantage: 1, the gas heat exchanger most steam that condenses, reduce the gas volume of suction vavuum pump, and guaranteeing can to select the more water ring vacuum pump of ting model for use under the identical vacuum prerequisite, reduce power consumption; 2, can distinguish the refrigeration of independent adjustments of gas heat exchanger and working solution heat exchanger by the switch of frequency conversion and control magnetic valve, under situation not influenced by ambient temperature, realize the working solution temperature constant, when winter, temperature was low, compressor can guarantee the working solution temperature under the underload situation, reduce power consumption; 3, use air-conditioning refrigerant directly to cool off and bleed and working solution, improve heat transfer temperature difference, make that gas heat exchanger and working solution heat exchanger volume are littler, more be conducive to the integrated and manufacturing of water ring vacuum pump system.
Description of drawings
Fig. 1 is principle schematic of the present utility model;
Description of reference numerals: 1, compressor, 2, frequency converter, 3, water-cooled condenser, 4, choke valve, 5, magnetic valve, 6, gas heat exchanger, 7, water ring vacuum pump, 8, moisture trap, 9, the working solution heat exchanger, 10, thermocouple.
The specific embodiment
Below in conjunction with the drawings and specific embodiments content of the present utility model is described in further details.
Embodiment:
See also shown in Figure 1ly, a kind of condensing turbine group comprises that with efficient water ring vacuum pump system compressor 1, frequency converter 2, water-cooled condenser 3, choke valve 4, first magnetic valve 5, second magnetic valve 51, gas heat exchanger 6, water ring vacuum pump 7, moisture trap 8, working solution heat exchanger 9, thermocouple 10 and corresponding connecting line and valve constitute.
The evaporimeter that gas heat exchanger and working solution heat exchanger use as parallel connection absorbs heat, the steam during the condensation condenser is bled and cooling water ring vacuum pump working solution; Also be connected with frequency converter on described compressor, the supporting frequency converter of the compressor of refrigeration plant is according to the signal controlling compressor rotary speed that refrigerant flow changes, and realizes that in parallel the use also of two evaporimeters can control separately; On vacuum exhaust pipe and the working solution circulation pipe gas heat exchanger is set and the working solution heat exchanger cools off, gas heat exchanger and working solution heat exchanger are as the evaporimeter in parallel of refrigeration plant.
Its concrete syndeton is: the water ring vacuum pump 7, moisture trap 8, working solution heat exchanger 9, thermocouple 10, the water ring vacuum pump 7 that connect and constitute working solution closed cycle loop successively, working solution recycles in system, and moisture trap 8 has exhaust, moisturizing pipeline respectively; Connect and constitute compressor 1, water-cooled condenser 3, choke valve 4, first magnetic valve 5, working solution heat exchanger 9, second magnetic valve 51, gas heat exchanger 6, the compressor 1 of cold-producing medium link circuit successively, wherein draw two branch roads behind the choke valve 4, wherein a branch road is connected with working solution heat exchanger 9 by first magnetic valve 5, another branch road is connected with gas heat exchanger by second magnetic valve 51, form air-conditioning refrigerant closed cycle in parallel, on compressor 1, also be connected with frequency converter 2.
Water ring vacuum pump 7 bleeding points link to each other with turbine condenser by pipeline, vacuum exhaust pipe arranges gas heat exchanger 6, gas heat exchanger is as one of evaporimeter in parallel of refrigerating plant, in bleeding by the evaporative cooling of cold-producing medium water vapour, condensed water and the on-condensible gas of water vapour are drawn into water ring vacuum pump, with be extracted into moisture trap 8 after working solution mixes, on-condensible gas is by moisture trap 8 top emptyings, working solution flows into water ring vacuum pump through working solution heat exchanger 9 cooling backs and circulates, and working solution more than needed is drained by the overflow pipe of moisture trap 8.Working solution heat exchanger 9 is as one of evaporimeter in parallel of refrigerating plant, by the evaporative cooling working solution of cold-producing medium.Water ring vacuum pump working solution import preceding pipeline is equipped with thermocouple 10, and the control system of refrigeration plant can be regulated the working solution temperature by switch electromagnetic valve and is cooled to design temperature.
The circulation line of the refrigerating plant of water ring vacuum pump 7 systems is by compressor 1, water-cooled condenser 3, choke valve 4, magnetic valve 5, working solution heat exchanger 9, magnetic valve 51, gas heat exchanger 6 and corresponding connecting line constitute, cold-producing medium is compressed into high temperature and high pressure gas by compressor 1, in water-cooled condenser 3, condense into highly pressurised liquid, by choke valve 4 puffings, enter the evaporation of gas heat exchanger 6 (one of evaporimeter) in parallel and working solution heat exchanger 9 (one of evaporimeter) respectively and absorb heat, steam during condensation is bled and cooling water ring vacuum pump working solution, the refrigerant gas after the heat absorption is got back to compressor 1.Compressor 1 is furnished with corresponding control system, supporting frequency converter 2 is installed, control system is by water ring pump bleeding point and working solution import thermocouple signal, second magnetic valve 51 and first magnetic valve, 5 switches of control gas heat exchanger 6 and working solution heat exchanger 9, regulate the flow of cold-producing medium, realize the temperature that refrigeration is set, frequency converter 2 is by the output of signal controlling compressor 1 refrigerating capacity of changes in flow rate.The water-cooled condenser 3 of refrigeration plant uses power station recirculated cooling water cooling.
Before water ring vacuum pump 7 starts, earlier working solution is mended moisture trap 8 and water ring vacuum pump 7 by water pipe, start successively and water ring vacuum pump 7 and the compressor 1 that starts refrigeration plant, the condensing turbine group puts into operation with efficient water ring vacuum pump system, and system in service regulates 15 ℃ that control water ring vacuum pump 7 working solution temperature maintenance are set automatically.
Above-listed detailed description is at the specifying of the utility model possible embodiments, and this embodiment is not in order to limiting claim of the present utility model, does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the claim of this case.

Claims (1)

1. efficient water ring vacuum pump system of condensing turbine group, it is characterized in that: the water ring vacuum pump (7), moisture trap (8), working solution heat exchanger (9), thermocouple (10), the water ring vacuum pump (7) that connect and constitute working solution closed cycle loop successively, working solution recycles in system, and moisture trap (8) has exhaust, moisturizing pipeline respectively; Connect and constitute compressor (1), water-cooled condenser (3), choke valve (4), first magnetic valve (5), working solution heat exchanger (9), second magnetic valve (51), gas heat exchanger (6), the compressor (1) of cold-producing medium link circuit successively, wherein draw two branch roads behind the choke valve (4), wherein a branch road is connected with working solution heat exchanger (9) by first magnetic valve (5), another branch road is connected with gas heat exchanger (6) by second magnetic valve (51), forms air-conditioning refrigerant closed cycle in parallel; The bleeding point of described vacuum water ring pump (7) is connected with gas heat exchanger (6), bleeds from condenser; Also be connected with frequency converter (2) on the described compressor (1); Gas heat exchanger (6) and working solution heat exchanger (9) are as the evaporimeter in parallel of refrigeration plant.
CN 201320054383 2013-01-30 2013-01-30 Efficient water ring vacuum pump system for condensing steam turbine unit Expired - Fee Related CN203177688U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104296554A (en) * 2014-10-10 2015-01-21 张邵波 Steam condensing type power station steam condenser chamber vacuumizing system
CN104613789A (en) * 2015-02-05 2015-05-13 邵武华新化工有限公司 Hydrogen fluoride gas condensation method and device
CN105953601A (en) * 2016-06-30 2016-09-21 深圳市国电投资有限公司 Power plant condenser vacuum maintaining unit provided with water chilling unit
CN106089635A (en) * 2016-08-05 2016-11-09 王文兵 A kind of vacuum pump set of the steam that mainly draws water
US10539370B2 (en) 2014-09-13 2020-01-21 Citrotec Indústria E Comércio Ltda Vacuum condensation system by using evaporative condenser and air removal system coupled to condensing turbines in thermoelectric plants
CN113685356A (en) * 2020-10-23 2021-11-23 苏州普轮电子科技有限公司 Cooling device for water ring vacuum pump for vacuumizing power station condenser

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10539370B2 (en) 2014-09-13 2020-01-21 Citrotec Indústria E Comércio Ltda Vacuum condensation system by using evaporative condenser and air removal system coupled to condensing turbines in thermoelectric plants
CN104296554A (en) * 2014-10-10 2015-01-21 张邵波 Steam condensing type power station steam condenser chamber vacuumizing system
CN104613789A (en) * 2015-02-05 2015-05-13 邵武华新化工有限公司 Hydrogen fluoride gas condensation method and device
CN105953601A (en) * 2016-06-30 2016-09-21 深圳市国电投资有限公司 Power plant condenser vacuum maintaining unit provided with water chilling unit
CN106089635A (en) * 2016-08-05 2016-11-09 王文兵 A kind of vacuum pump set of the steam that mainly draws water
CN113685356A (en) * 2020-10-23 2021-11-23 苏州普轮电子科技有限公司 Cooling device for water ring vacuum pump for vacuumizing power station condenser

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Granted publication date: 20130904

Termination date: 20200130