CN204730692U - Condenser vacuum extractor - Google Patents
Condenser vacuum extractor Download PDFInfo
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- CN204730692U CN204730692U CN201520481770.2U CN201520481770U CN204730692U CN 204730692 U CN204730692 U CN 204730692U CN 201520481770 U CN201520481770 U CN 201520481770U CN 204730692 U CN204730692 U CN 204730692U
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- lobe pump
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Abstract
A kind of condenser vacuum extractor, comprise three grades of lobe pumps, the import of first order lobe pump has the pipeline of hand-operated valve, quick valve, non-return valve to be connected with condenser by string, first order Roots delivery side of pump to be connected with the import of second level lobe pump by pipeline and on pipeline, to arrange the first one-way exhaust pipe, second level Roots's delivery side of pump to be connected with the import of third level lobe pump by pipeline and on pipeline, to arrange the second one-way exhaust pipe and cooler, and third level Roots delivery side of pump connects exhausting silencing apparatus by pipeline.Pipeline is drawn in the inlet connecting branch road of cooler and third level lobe pump and is connected to the cooling device of second level lobe pump as second level lobe pump, third level lobe pump connects the pipeline that communicates with the air cooling device as third level lobe pump.This device motor can direct power frequency startup, and operate power is low, and end vacuum value is high, and suction flow is large, and the type of cooling is more reasonable, simple to operate, without the need to regulating.
Description
Technical field
The utility model relates to a kind of condenser vacuum extractor, for meeting the requirement that condenser vacuumizes.
Background technology
The vavuum pump now run, major part uses water ring pump and water jet air ejector, does not separate setting up vacuum and maintain in vacuum.During unit starting, be designed to powerful vavuum pump in order to specified vacuum values set up in the short period of time by condenser, the major part of now vavuum pump suction is air; And condenser is when normally running, the major part of vavuum pump suction is steam, and the flow of actual withdrawing air is very little.When can normally run for condenser specially, be the feature of steam according to the medium of suction, steam meets condensation knot, and the devaporation of low temperature becomes smaller volume after the saturated condensate water corresponding to this temperature, designs a kind of more energy-conservation condenser vacuum extractor.The vavuum pump of present operation, operate power is bigger than normal.
The feature that condenser runs: steam becomes condensate water, height of formation vacuum after entering condenser cooling.Due to condenser and auxiliary equipment huge, inevitably leaking-in air, and leaked-in air incondensable gas at normal temperatures, air forms one deck air film at the heat exchanger tube surface aggregation of condenser, hinder the condensation heat transfer of steam and heat exchanger tube, thermal resistance increases, and soften(ing) is declined, the efficiency of unit reduces, so must there be vaccum-pumping equipment that leaked-in air is released.And present vavuum pump (such as water ring pump and water jet air ejector) is in operation by the restriction of coolant water temperature, add vavuum pump cooler heat transfer effect poor, or cooling water flow quantity not sufficient, cause the working solution temperature drift of vavuum pump, the end vacuum value of vavuum pump reduces, cannot from intake-gas in condenser, condenser vacuum value reduces.The working solution temperature drift of vavuum pump also causes the suction flow of vavuum pump to reduce, and air residual in condenser increases, and affect heat exchange, vacuum worsens further.Single consider from condenser vaccum-pumping equipment, make the vacuum values that condenser vacuum value reaches most economical, vaccum-pumping equipment must meet two conditions: a vacuum values being the end vacuum value of vaccum-pumping equipment and must being greater than condenser; One is that suction flow must meet condenser requirements of one's work.
Existing three grades of lobe pump VFC.In order to prevent electromotor overload during startup, and make variable frequency starting into.In normal operation, when winter, vacuum values raised, reduce frequency and run; When summer, vacuum values reduced, improve frequency and run.This method of operation is analyzed inadvisable from the operation angle of condenser, characteristic from steam: when winter, vacuum values raised, the specific volume of steam becomes large, volume flow increases, and lobe pump is a kind of displacement pump, when vacuum values raises, the volume flow of condenser increases, and in order to make air capacity residual in condenser reduce, should not reduce frequency and running.In order to make condenser operate in most economical vacuum values, suction flow should improve.Summer, vacuum values was low, and unit efficiency is low, and the vapor flow of condenser increases, and in order to make air capacity residual in condenser reduce, also should improve the suction flow of vavuum pump.Comprehensive analysis vaccum-pumping equipment should improve suction flow, air capacity residual in condenser is reduced as much as possible, improves heat exchange efficiency.
Existing three grades of lobe pumps produce condensate water after preventing cooler, form water resistance or seeping phenomenon, and are provided with temperature control equipment, and the temperature being used for controlling steam, more than saturation temperature, can not produce condensate water.Enter the refrigerating gas temperature drift of lobe pump like this, be unfavorable for the cooling of lobe pump.Be unfavorable for reducing volume flow simultaneously, motor power (output) is increased.Simultaneous temperature control device is malfunctioning or control not at that time, easily to generate condensate water, and produce water resistance or oscillation phenomenon, the pump housing is generated heat, equipment stops.The temperature control equipment arranged, make system complex, control system is loaded down with trivial details.
Summary of the invention
The purpose of this utility model is to provide a kind of condenser vacuum extractor, be satisfied with requirement that condenser vacuumizes and operate power low; End vacuum value is high simultaneously, and suction flow is large, guarantees that condenser runs under most economical operating mode; Motor power frequency operation, guarantees the long period safe operation of equipment.
The purpose of this utility model realizes as follows: this condenser vacuum extractor, comprise three grades of lobe pumps, three groups of roots pump rotors of three grades of lobe pumps are connected with same motor power, the import of first order lobe pump has hand-operated valve by string, quick valve, the pipeline of non-return valve is connected with condenser, first order Roots delivery side of pump to be connected with the import of second level lobe pump by pipeline and on pipeline, to arrange the first one-way exhaust pipe, second level Roots's delivery side of pump to be connected with the import of third level lobe pump by pipeline and on pipeline, to arrange the second one-way exhaust pipe and cooler, one-way exhaust pipe refers to the blast pipe that check valve (non-return valve) is housed, third level Roots delivery side of pump connects exhausting silencing apparatus by pipeline.This device is driven by a motor, can direct power frequency startup.Electromotor overload during in order to prevent power frequency startup, first order lobe pump and second level lobe pump outlet conduit are respectively equipped with the first one-way exhaust pipe and the second one-way exhaust pipe.Because the flow-rate ratio third level lobe pump of first order lobe pump and second level lobe pump is bigger than normal, the diameter of outlet conduit is bigger than normal, when three grades of lobe pumps start, first order lobe pump and second level lobe pump outlet pressure can raise, blast pipe now through band non-return valve is exhausted, the pressure reduction of lobe pump can not be made to increase, electromotor overload.After gas is discharged, three grades of lobe pumps form negative pressure gradually, and now the non-return valve of one-way exhaust pipe is closed in time, and the entrance of lobe pump reaches the negative pressure that works normally gradually.This device starts normally, runs, without the need to runing adjustment in input coefficient.Cooler is arranged between second level lobe pump and third level lobe pump, and position is on three grades of lobe pumps, and the gas that second level lobe pump is discharged enters cooler by pipeline, and cooler, without temperature control equipment, does not have temperature limiting, can fully cool.After supercooling, become saturated vapor and condensate water, volume flow reduces, and can reduce the power of motor.Because cooler is arranged on above three grades of lobe pumps, the condensate water of generation directly enters third level lobe pump downwards, at cooler internal water accumulation, can not can not produce water resistance phenomenon.The condensate water simultaneously produced enters in third level lobe pump, between rotor and pump case, form moisture film, reduces the adverse current of gas, the gas of adverse current in lobe pump is reduced greatly, improves the efficiency of lobe pump, reduces gas friction loss.And the condensate water entering third level lobe pump has cooling effect to rotor and pump case.
Pipeline is drawn in the inlet connecting branch road of cooler and third level lobe pump and is connected to the cooling device of second level lobe pump as second level lobe pump, third level lobe pump connects the pipeline that communicates with the air cooling device as third level lobe pump.Due to can heat be produced after gas compression, gas temperature is raised.Three grades of lobe pumps are after three second compression, if do not take cooling, gas temperature can raise a lot, and High Temperature Gas knows from experience heating rotor and pump case.Due to lobe pump, dynamic and static gap is very little during fabrication, if temperature rise is excessive, dynamic and static gaps can be caused to reduce, friction, even rotor meeting locking, and electromotor overload trips.Because temperature rises less after the compression of first order lobe pump, dynamic and static gaps can not be affected, so first order lobe pump does not design cooling.Second level lobe pump is cooled by the steam after cooler.Directly be disposed in air by exhausting silencing apparatus after the compression of third level lobe pump, third level lobe pump is cooled by the cold air of surrounding, can not affect the flow of lobe pump.Condensate water simultaneously after cooler also has cooling effect to rotor and pump case.
The utility model device is condenser vacuum extractor, for condenser provides the service of setting up and maintaining vacuum.This device is connected by pipeline, hand-operated valve, quick valve, non-return valve with condenser, and the energy quick closedown when normal stopping and emergency stop valve trip, prevent air from bleeding in condenser, stand-by equipment starts, and maintains vacuum, guarantees the safe operation of whole system.A set of device can be increased in existing system modification scheme, be arranged in parallel with former vavuum pump, at unit starting with in running, can complement one another in energy-conservation and security with former vavuum pump, add security, reduce energy consumption; Also directly this device can be adopted in newly-built equipment, when unit starting, start all this devices, when unit sets up normal work negative pressure, run a set of or two cover maintenance vacuum, all the other devices are for subsequent use, and the end vacuum value of this device and suction flow are satisfied with the needs that unit is set up and maintained vacuum.This device utilizes three grades of lobe pump series operations, improves end vacuum value, adds cooler, reduce volume flow, makes three grades of lobe pumps reduce operate power.This device redesigns three grades of lobe pump coolers, and make the cooling of lobe pump more reasonable, adopt cold steam, cold air and condensate water as cooling medium, the multiple type of cooling is also used.This device adds the discharge duct of band non-return valve, and motor can directly power frequency startup, operation, simple to operate, without the need to adjustment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
With reference to Fig. 1, the utility model comprises three grades of lobe pumps, three groups of roots pump rotors of three grades of lobe pumps are connected with same motor 10 power, the import of first order lobe pump 11 has hand-operated valve 2 by string, quick valve 3, the pipeline of non-return valve 4 is connected with condenser 1, the outlet of first order lobe pump 11 to be connected with the import of second level lobe pump 12 by pipeline and on pipeline, to arrange the first one-way exhaust pipe 5, the outlet of second level lobe pump 12 to be connected with the import of third level lobe pump 13 by pipeline and on pipeline, to arrange the second one-way exhaust pipe 6 and cooler 7, the outlet of third level lobe pump 13 connects exhausting silencing apparatus 14 by pipeline.Pipeline is drawn in the cooler 7 inlet connecting branch road with third level lobe pump 13 and is connected to the cooling device 8 of second level lobe pump 12 as second level lobe pump, third level lobe pump 13 connects the pipeline that communicates with the air cooling device 9 as third level lobe pump.When the utility model normally runs, the most of steam aspirated from condenser 1 and a small amount of air enter first order lobe pump 11, smaller volume after compression, enter second level lobe pump 12, with the cooling water steam one piece of second level lobe pump 12 again second compression laggard enter cooler 7, cold steam and condensate water is become after cooling, some cold steam enters cooling in second level lobe pump 12, remaining steam and condensate water enter third level lobe pump 13, with the cooling-air of third level lobe pump 13 after third time is compressed, drain into exhausting silencing apparatus 14.The utility model, can directly use when vaccum-pumping equipment type selecting for the condenser 1 of newly-built and design.
Claims (2)
1. a condenser vacuum extractor, comprise three grades of lobe pumps, three groups of roots pump rotors of three grades of lobe pumps are connected with same motor power, it is characterized in that: the import of first order lobe pump (11) has hand-operated valve (2) by string, quick valve (3), the pipeline of non-return valve (4) is connected with condenser (1), the outlet of first order lobe pump (11) to be connected with the import of second level lobe pump (12) by pipeline and on pipeline, to arrange the first one-way exhaust pipe (5), the outlet of second level lobe pump (12) to be connected with the import of third level lobe pump (13) by pipeline and on pipeline, to arrange the second one-way exhaust pipe (6) and cooler (7), the outlet of third level lobe pump (13) connects exhausting silencing apparatus (14) by pipeline.
2. condenser vacuum extractor according to claim 1, it is characterized in that: on the inlet connecting branch road of cooler (7) and third level lobe pump (13), draw pipeline and be connected to the cooling device (8) of second level lobe pump (12) as second level lobe pump, third level lobe pump (13) connects the pipeline that communicates with the air cooling device (9) as third level lobe pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520481770.2U CN204730692U (en) | 2015-07-07 | 2015-07-07 | Condenser vacuum extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520481770.2U CN204730692U (en) | 2015-07-07 | 2015-07-07 | Condenser vacuum extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204730692U true CN204730692U (en) | 2015-10-28 |
Family
ID=54389034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520481770.2U Expired - Fee Related CN204730692U (en) | 2015-07-07 | 2015-07-07 | Condenser vacuum extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204730692U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973023A (en) * | 2016-05-16 | 2016-09-28 | 长沙湘资生物科技有限公司 | Multi-stage backheating hot pressing type vacuum pumping system provided with low-pressure heater and shaft seal heater and adjustment method of vacuum pumping system |
-
2015
- 2015-07-07 CN CN201520481770.2U patent/CN204730692U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973023A (en) * | 2016-05-16 | 2016-09-28 | 长沙湘资生物科技有限公司 | Multi-stage backheating hot pressing type vacuum pumping system provided with low-pressure heater and shaft seal heater and adjustment method of vacuum pumping system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20210707 |
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| CF01 | Termination of patent right due to non-payment of annual fee |