CN106523366B - Boosting type liquid-ring vacuum pump return water system and its water return method with rotation film - Google Patents
Boosting type liquid-ring vacuum pump return water system and its water return method with rotation film Download PDFInfo
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- CN106523366B CN106523366B CN201610783619.3A CN201610783619A CN106523366B CN 106523366 B CN106523366 B CN 106523366B CN 201610783619 A CN201610783619 A CN 201610783619A CN 106523366 B CN106523366 B CN 106523366B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of boosting type liquid-ring vacuum pump return water systems with rotation film, are related to a kind of liquid-ring vacuum pump return water system for fields such as chemical industry, machinery, exploration, electric power.It includes vacuum pump ontology, moisture trap, into materail tube, go out materail tube, booster pump, the areas Xuan Mo, coolant inlet, gas-water separation zone, heat transfer zone, commutating zone, deflector, gas phase channel, annular partition；Rotating-film tube is installed, the tube wall of rotating-film tube has been equipped with fenestra in the areas Xuan Mo；Heat exchange partition board is installed, heat exchange liquid import is connected to the water inlet of lower heat exchanger tube inside heat transfer zone；The outlet of heat exchange liquid is connected to the water outlet of upper heat exchanger tube；The input terminal of booster pump is connected to liquid outlet, the output end of booster pump is detached with the water return outlet and coolant inlet.The present invention advantageously reduces return water flow disturbance, can reduce resistance.The invention further relates to the water return methods of this boosting type liquid-ring vacuum pump return water system with rotation film.
Description
Technical field
The present invention relates to a kind of liquid-ring vacuum pump return water systems for fields such as chemical industry, machinery, exploration, electric power, specifically
Say be it is a kind of with rotation film boosting type liquid-ring vacuum pump return water system.The invention further relates to this boosting types with rotation film
The water return method of liquid-ring vacuum pump return water system.
Background technology
Liquid-ring vacuum pump is mainly used for the forming process of black vacuum, due to its have close to isotherm compression, it is unwise to dust
The advantages of sense, sucking gas can be with entrained liquids or a large amount of vapor, is widely used in power industry field, to condenser
Vacuumizing phase and vacuum maintenance stage are completed using vacuum pump and complete unit.Liquid-ring vacuum pump by slow-speed motor,
Moisture trap, working solution cooler, atmospheric control, high-low level control, pump group inside related connecting pipe, valve
And the compositions such as electrical control equipment, effect are to establish vacuum when Steam Turbine starts and extract to leak at vacuum system imprecision
The air and non-condensing steam entered, to maintain the vacuum degree of condenser.Liquid-ring vacuum pump is returned in pump chamber by biasing impeller
Transhipment is dynamic to make swept volume of a single chamber cyclically-varying to realize the vacuum pump of pumping.
Liquid rotary pump at runtime, since working fluid temperature constantly rises, and constantly has water from exhaust in exhaust process
Mouth is lost in, and discharge reduction in pump chamber causes the reduced performance of liquid rotary pump；And due to by working solution temperature and pressure for vaporization
Limitation, inside cavity are easy to happen cavitation.Cavitation not only can generate destruction to the flow passage components of liquid rotary pump, can also make liquid
Ring pump generates vibration and noise, and its efficiency is caused to decline, therefore should prevent liquid rotary pump from working under cavitation state as possible.Cause
This, needs constantly to supplement working fluid into pump housing during pendular ring pump operation, to maintain work liquid measure and reduce work
Make the temperature of liquid.
The equipment such as liquid-ring vacuum pump or compressor need to supplement cooling medium, i.e. working solution constantly into pendular ring at work.
The working solution is substantially that the steam water interface of vacuum pump discharge detaches via steam-water separator and passes through the reflux of heat exchanger postcooling
Liquid, flow, temperature and the reflux type of the part cooling work liquid will directly influence the work temperature of vacuum pump pendular ring
Degree, to influence the working efficiency and cavitation degree of risk of vacuum pump.
As shown in Fig. 2, in the return water system of existing vacuum pump, water return outlet is often designed in close to vacuum pump end cap one
Side, cooling work liquid are guided near vacuum pump impeller by distribution plate along the water return outlet, are entered by original water return outlet
Inner barrel.Cooling work liquid initially enters the adjacent two interlobate volume list of impeller by original water return outlet when impeller rotates
Member, after enter pendular ring with the effect of centrifugal force and start mass transfer, heat transfer process.
Above-mentioned existing liquid-ring vacuum pump return water system, it is advantageous that the centrifugal force of impeller and adjacent leaf is utilized
Vacuum between piece simplifies system to allow working solution from flowing into inside pendular ring under the conditions of unpressurized.However as in recent years
Carry out liquid-ring vacuum pump return water system the performance requirement of vacuum pump is gradually increased, above-mentioned existing liquid-ring vacuum pump return water system is
It cannot be satisfied related request.Such as when summer or long-term high temperature area applying vacuum pump, pendular ring temperature will be excessively high to be caused
A series of problems, such as causing the decline of the vacuum efficiency of pump, exhaust capacity decline, cavitation, such problem is cooling to vacuum liquid pump circumstance temperature degree
More stringent requirements are proposed for the return water amount of working solution, water temperature, return water mode, heat exchange efficiency, above-mentioned existing liquid-ring vacuum pump
The drawbacks of return water mode of return water system, also shows therewith.
As shown in Fig. 2, its coolant liquid (cryogenic liquid) of the return water mode of existing liquid-ring vacuum pump return water system be via
Original water return outlet is first into the interlobate elementary volume, volume element of two adjacent with impeller, then enters under the influence of centrifugal force
Start mass-and heat-transfer on the inside of pendular ring.And under the high speed rotation of impeller, coolant liquid moves to gas vent by original water return outlet
The time of (draining) is very of short duration, and the heat exchange between liquid is only limitted to pendular ring inner side edge interlayer.I.e. coolant liquid is stopped in pendular ring
Stay the time short, cryogenic liquid does not exchange heat fully and cylinder, high temperature of the pendular ring close to barrel side just is discharged by gas vent (draining)
Liquid does not obtain effective temperature-reducing or displacement.It is difficult to decline so as to cause pendular ring temperature；In addition to this, as shown in Fig. 2, often
The heat transmission equipment multiselect circumscribed plate heat exchanger of return water system is advised, such system layout is not compact, takes up a large area, maintenance
Inconvenience, heat exchange efficiency is not high, and to be easy to cause, vacuum pump summer condition overtemperature, working efficiency are low, exhaust capacity declines, vapour
The problems such as erosion.
Invention content
The first object of the present invention be in order to overcome the shortcoming of background technology, and provide it is a kind of with rotation film supercharging
Type liquid-ring vacuum pump return water system.
The second object of the present invention be in order to overcome the shortcoming of background technology, and provide it is a kind of with rotation film supercharging
Type liquid-ring vacuum pump return water system.
To achieve the goals above, the technical scheme is that：Boosting type liquid ring vacuum pump return water system with rotation film
System, including vacuum pump ontology, moisture trap, into materail tube and go out materail tube；Vacuum pump ontology upper end is equipped with pump housing object
Expect that import and pump housing material outlet, vacuum pump ontology lower end are equipped with water return outlet, the moisture trap upper end is equipped with separation implements
Expect that import and separated gas outlet, moisture trap lower end are equipped with separation liquid outlet, heat exchange liquid import and the outlet of heat exchange liquid；Institute
State and be mounted on vacuum pump ontology into materail tube and be connected to pump housing material inlet, it is described go out materail tube one end mounted on vacuum pump
It is connected on ontology and with pump housing material outlet, the other end is mounted on moisture trap and is connected to separator material inlet；Its
It is characterized in that：Further include booster pump, the outer upper ends of the moisture trap are equipped with the areas Xuan Mo, and moisture trap is internally provided with
Gas-water separation zone, heat transfer zone and commutating zone, gas-water separation zone and commutating zone are respectively positioned on moisture trap upper end, and heat transfer zone is located at gas
Separator lower end；Coolant inlet is installed on the shell in the areas Xuan Mo, be equipped in the areas Xuan Mo with it is described go out materail tube
The tube wall of the rotating-film tube of connection, rotating-film tube is equipped with the fenestra that water supply stream passes through, and the rotating-film tube is connected to gas-water separation zone,
Separated gas outlet is connected to commutating zone, and separation liquid outlet is connected to heat transfer zone；Between the gas-water separation zone and commutating zone
The deflector being equipped with inside the moisture trap, deflector be equipped with for separation gas by gas phase channel, it is described to change
Hot-zone upper end be equipped be mounted on moisture trap inside annular partition, and gas-water separation zone lower end and commutating zone lower end with change
Hot-zone upper end is connected to, and the heat exchange partition board being connect with the inner wall of moisture trap is equipped with inside the heat transfer zone, and heat exchange partition board will
The upper heat transfer zone positioned at heat exchange partition board upper end, and the lower heat transfer zone positioned at heat exchange partition board lower end are divided into the heat exchange, it is described on
Several upper heat exchanger tubes are equipped in heat transfer zone, equipped with several lower heat exchanger tubes in lower heat transfer zone, the water outlet of the lower heat exchanger tube with it is upper
The water inlet of heat exchanger tube is connected to；The heat exchange liquid import is located at below heat exchange partition board, and is connected to the water inlet of lower heat exchanger tube；Institute
It states the outlet of heat exchange liquid to be located between heat exchange partition board and annular partition, and is connected to the water outlet of upper heat exchanger tube；The booster pump
Input terminal is connected to liquid outlet, the output end of booster pump is detached with the water return outlet and coolant inlet.
In the above-mentioned technical solutions, the skinning centerline hole is in the horizontal direction outer rise with the intersection point of skinning pipe outer wall
Film point of contact, tangent line of the outer skinning point of contact in skinning pipe outer wall be outer skinning tangent line, the outer skinning tangent line with rise fenestra in
Angle between heart line is 15~60 °, and the angle risen between the center line and horizontal plane of fenestra is 5~20 °.
In the above-mentioned technical solutions, the skinning centerline hole is in the horizontal direction interior rise with the intersection point of skinning inside pipe wall
Film point of contact, outer skinning point of contact are located above interior skinning point of contact, the angle between the outer skinning tangent line and the center line for playing fenestra
It it is 30 °, the angle risen between the center line and horizontal plane of fenestra is 10 °.
In the above-mentioned technical solutions, the water return outlet center line contact position with vacuum pump body outer wall in the horizontal direction
For return water point of contact, tangent line of the return water point of contact on the outer wall of vacuum pump ontology is return water tangent line, the return water tangent line with return
The centerline parallel at the mouth of a river.
In the above-mentioned technical solutions, the water return outlet has multiple and is arranged in permutation on vacuum pump ontology, water return outlet
For cavernous structure or axial banded structure.
In the above-mentioned technical solutions, the cross section of the shell of the moisture trap is ellipse, and the gas phase channel is
The multiple deflector holes being arranged on deflector, the separation liquid outlet and heat exchange liquid import are to be adjacently positioned.
In the above-mentioned technical solutions, there are two the coolant inlets, there are two rotating-film tubes, and described two rotating-film tubes are located at
Between described two coolant inlets.
In order to realize the second purpose, technical scheme is as follows：It comprises the technical steps that, step 1：By work
It is passed into vacuum pump ontology as liquid, and so that working solution is formed pendular ring in vacuum pump ontology by impeller and distribution plate；Step
Two：Pending high temperature air-water mixture is fed into vacuum pump ontology, pending high temperature air-water mixture is made to pass through
Distribution plate is entered in pendular ring and is contacted with pendular ring, and the substance that pendular ring is formed after being mixed with pending high temperature air-water mixture is
First air-water mixture；Step 3：First air-water mixture is discharged by the gas vent on distribution plate, and enters out material
Pipe, then extends materail tube and is flowed into rotating-film tube；Step 4：Coolant liquid is injected into the areas Xuan Mo by coolant inlet, is revolved
Coolant liquid in film area has passed through fenestra to enter in rotating-film tube and has been mixed with the first air-water mixture, coolant liquid and the first air water
The mixed substance of mixture is the second air-water mixture；Step 5：Second air-water mixture enters air water across the areas Xuan Mo
Separator interior, and gas-water separation is carried out in gas-water separation zone, the second air-water mixture is separated into separation gas and divides at this time
Chaotropic body；Step 6：The separation gas initially passes through the gas phase channel between gas-water separation zone and commutating zone, subsequently into
Into commutating zone, finally inside commutating zone after over commutation, from the separated gas outlet discharge being connected to commutating zone；Step
Seven：Separation liquid passes through gas-water separation zone and commutating zone to enter in heat transfer zone, is contacted with the heat exchanger tube inside heat transfer zone, detaches
Liquid after heat exchange, from the separation liquid outlet discharge positioned at heat transfer zone bottom, detaches liquid and realizes at this time in heat transfer zone
Heat exchange function；Step 8：The heat exchanging liquid part for detaching liquid outlet discharge is injected by booster pump by coolant inlet
In the areas Xuan Mo, another part is injected by water return outlet in vacuum pump ontology, realizes the recycling of separation liquid；Step 9：
Heat exchanging liquid is first entered from heat exchange liquid import in heat transfer zone, then upper heat exchanger tube is flowed into from lower heat exchanger tube, finally from heat exchange
Liquid outlet discharge, in the process, the heat exchanging liquid in heat exchanging liquid and upper heat exchanger tube in lower heat exchanger tube can be with heat transfer zone
Interior separation liquid contact, heat exchanging liquid realize heat exchange function.
There is the prior art to compare, beneficial effects of the present invention are as follows：
1, multiple water return outlets on vacuum pump wall surface will be set, and make to be to cut between water return outlet and the barrel of vacuum pump ontology
To setting, return water flow disturbance is advantageously reduced, resistance can be reduced.
2, the lower working solution of temperature can be made to enter pendular ring from barrel when return water mode of the invention operation, is changed with pendular ring
Vacuum pump cylinder is discharged from exhaust outlet in high-temp liquid on the inside of pendular ring while hot, working solution is realized to height while heat exchange
The displacement of geothermal liquid.
3, so that separation liquid outlet, coolant inlet is connected to water return outlet by booster pump, can effectively supplement working solution
Amount, advantageously reduces pendular ring temperature.
4, working solution is supplemented from suction side, low-pressure vortex at this can be impacted well, improve working fluid pressure, to significantly
Cavitation risk is reduced, ensures the Effec-tive Function of liquid-ring vacuum pump and the economy of Turbo-generator Set.
5, liquid after cooling is introduced into separator inlet using booster pump, precools the high-temp liquid into separator,
It can be lowered into the temperature of the liquid of integrated heat exchanger, to reduce terminal temperature difference, improve heat exchange efficiency.
6, the set-up mode of fenestra is played in the present invention can make the liquid into rotating-film tube form rotation film, while pass through increasing
Press pump makes the cryogenic liquid come out from discharge channel re-enter into skinning area, is conducive to improve gas-water separation efficiency, from
And ensure system stable operation, improve the economy of Turbo-generator Set.
Description of the drawings
Fig. 1 is the structural schematic diagram of liquid-ring vacuum pump return water system of the present invention.
Fig. 2 is the structural schematic diagram of existing liquid-ring vacuum pump return water system.
Fig. 3 is the structural schematic diagram of the moisture trap of the present invention.
Fig. 4 is the attachment structure schematic diagram for materail tube and rotating-film tube.
Fig. 5 is when prolonging horizontal direction, to have carried the structural schematic diagram of the rotating-film tube of fenestra.
Fig. 6 is the attachment structure schematic diagram of impeller, distribution plate, pendular ring and water return outlet.
Fig. 7 is structural schematic diagram when water return outlet is cavernous structure in the present invention.
Fig. 8 is structural schematic diagram when water return outlet is axial banded structure in the present invention.
The return water mode and heat exchange amount comparing result in conventional return water mode that Fig. 9 is the present invention.
The return water mode and pendular ring temperature comparisons' result in conventional return water mode that Figure 10 is the present invention.
Figure 11 is that temperature difference when return water enters heat exchanger in two kinds of return water mode separators compares, wherein described two times
Water mode is respectively the return water mode of the present invention and conventional return water mode.
1- vacuum pumps ontology in figure, 11- pump housing material inlets, 12- pump housing material outlets, 13- water return outlets, 14- impellers,
15- distribution plates, 16- pendular rings, 2- moisture traps, 21- separator material inlets, 22- separated gas outlets, 23- detach liquid
Outlet, 24- exchange heat liquid import, and 25- exchanges heat liquid outlet, and 26- deflectors, 27- gas phase channels, 28- annular partitions, 3- is into material
Pipe, 4- go out materail tube, 5- booster pumps, the areas 6- Xuan Mo, 61- coolant inlets, 62- rotating-film tubes, 63- fenestras, 7- gas-water separations
Area, the heat transfer zones 8-, 81- exchange heat partition board, the upper heat transfer zones 82-, heat transfer zone under 83-, the upper heat exchanger tubes of 84-, heat exchanger tube under 85-, and 9- is whole
Flow area.
Specific implementation mode
The performance that the invention will now be described in detail with reference to the accompanying drawings, but they do not constitute limitation of the invention, only
It is for example.Keep advantages of the present invention more clear by explanation simultaneously and is readily appreciated that.
Refering to known to attached drawing：Boosting type liquid-ring vacuum pump return water system with rotation film, including vacuum pump ontology 1, air water
Separator 2 into materail tube 3 and goes out materail tube 4；1 upper end of vacuum pump ontology is equipped with pump housing material inlet 11 and pump housing material
Outlet 12,1 lower end of vacuum pump ontology are equipped with water return outlet 13, and 2 upper end of the moisture trap is equipped with 21 He of separator material inlet
Separated gas outlet 22,2 lower end of moisture trap are equipped with separation liquid outlet 23, heat exchange liquid import 24 and heat exchange liquid outlet 25；
It is described to be mounted on vacuum pump ontology 1 into materail tube 3 and be connected to pump housing material inlet 11, it is described go out 4 one end of materail tube install
Be connected on vacuum pump ontology 1 and with pump housing material outlet 12, the other end be mounted on moisture trap 2 on and with separator material
Import 21 is connected to；It is characterized in that：Further include booster pump 5, the outer upper ends of the moisture trap 2 are equipped with the areas Xuan Mo 6, gas
Separator 2 is internally provided with gas-water separation zone 7, heat transfer zone 8 and commutating zone 9, and gas-water separation zone 7 and commutating zone 9 are respectively positioned on air water
2 upper end of separator, heat transfer zone 8 are located at 2 lower end of moisture trap；Coolant inlet 61 is installed on the shell in the areas Xuan Mo 6,
Be equipped in the areas Xuan Mo 6 with it is described go out the rotating-film tube 62 that is connected to of materail tube 4, the tube wall of rotating-film tube 62 is equipped with what water supply stream passed through
Fenestra 63 is played, the rotating-film tube 62 is connected to gas-water separation zone 7, and separated gas outlet 22 is connected to commutating zone 9, detaches liquid
Outlet 23 is connected to heat transfer zone 8；It is equipped between the gas-water separation zone 7 and commutating zone 9 inside moisture trap 2
Deflector 26, deflector 26 be equipped with for separation gas by gas phase channel 27,8 upper end of the heat transfer zone be equipped be mounted on gas
Annular partition 28 inside separator 2, and 7 lower end of gas-water separation zone and 9 lower end of commutating zone are connected to 8 upper end of heat transfer zone,
The heat exchange partition board 81 being connect with the inner wall of moisture trap 2 is installed, heat exchange partition board 81 is by the heat exchange inside the heat transfer zone 8
Area 8 divides for the lower heat transfer zone 83 positioned at the upper heat transfer zone 82 of heat exchange partition board 81 upper end, and positioned at 81 lower end of heat exchange partition board, described
It is equipped with several upper heat exchanger tubes 84 in upper heat transfer zone 82, several lower heat exchanger tubes 85, the lower heat exchanger tube 85 are equipped in lower heat transfer zone 83
Water outlet be connected to the water inlet of upper heat exchanger tube 84；The heat exchange liquid import 24 is located at 81 lower section of heat exchange partition board, and is changed under
The water inlet of heat pipe 85 is connected to；Heat exchange liquid outlet 25 is located between heat exchange partition board 81 and annular partition 28, and with upper heat exchange
The water outlet of pipe 84 is connected to；The input terminal of the booster pump 5 with detach liquid outlet 23 be connected to, the output end of booster pump 5 with
The water return outlet 13 and coolant inlet 61 are connected to.
Preferably, described 63 center line of fenestra is in the horizontal direction that outer skinning is cut with the intersection point of 62 outer wall of rotating-film tube
Point, tangent line of the outer skinning point of contact on 62 outer wall of rotating-film tube be outer skinning tangent line, the outer skinning tangent line with rise fenestra 63 in
Angle between heart line is 15~60 °, and the angle risen between the center line and horizontal plane of fenestra 63 is 5~20 °.
Preferably, described 63 center line of fenestra is in the horizontal direction that interior skinning is cut with the intersection point of 62 inner wall of rotating-film tube
Point, outer skinning point of contact are located above interior skinning point of contact, and the angle between the outer skinning tangent line and the center line for playing fenestra 63 is
30 °, the angle risen between the center line and horizontal plane of fenestra 63 is 10 °.
Preferably, 13 center line of the water return outlet is in the horizontal direction return water with the contact position of 1 outer wall of vacuum pump ontology
Point of contact, tangent line of the return water point of contact on the outer wall of vacuum pump ontology 1 are return water tangent line, the return water tangent line and water return outlet 13
Centerline parallel.
Preferably, the water return outlet 13 has multiple and is arranged in permutation on vacuum pump ontology 1, and water return outlet 13 is poroid
Structure or axial banded structure.
Preferably, the cross section of the shell of the moisture trap 2 is ellipse, and the gas phase channel 27 is deflector
The multiple deflector holes being arranged on 26, the separation liquid outlet and heat exchange liquid import 24 are to be adjacently positioned.
Preferably, there are two the coolant inlets 61, there are two rotating-film tubes 62, and described two rotating-film tubes 62 are located at described
Between two coolant inlets 61.
The present invention comprises the technical steps that,
Step 1：Working solution is passed into vacuum pump ontology 1, and so that working solution is existed by impeller 14 and distribution plate 15
Pendular ring 16 is formed in vacuum pump ontology 1；
Step 2：Pending high temperature air-water mixture is fed into vacuum pump ontology 1, pending High Temperature Gas is made
Aqueous mixtures are entered in pendular ring 16 across distribution plate 15 and are contacted with pendular ring 16, pendular ring 16 and pending high temperature mixing wastewater with air
The substance formed after object mixing is the first air-water mixture；
Step 3：First air-water mixture is discharged by the gas vent on distribution plate 15, and enters out materail tube 4, so
After extend materail tube 4 and be flowed into rotating-film tube 62；
Step 4：Coolant liquid is injected into the areas Xuan Mo 6 by coolant inlet 61, the coolant liquid in the areas Xuan Mo 6 passes through
Fenestra 63 is entered in rotating-film tube 62 and is mixed with the first air-water mixture, coolant liquid and the mixed object of the first air-water mixture
Matter is the second air-water mixture；
Step 5：Second air-water mixture is entered across the areas Xuan Mo 6 inside moisture trap 2, and in gas-water separation zone 7
Interior carry out gas-water separation, the second air-water mixture, which is separated into, at this time detaches gas and separation liquid；
Step 6：The separation gas initially passes through the gas phase channel 27 between gas-water separation zone 7 and commutating zone 9, so
After enter in commutating zone 9, finally inside commutating zone 9 after over commutation, from the separated gas outlet 22 being connected to commutating zone 9
Discharge；
Step 7：Separation liquid passes through gas-water separation zone 7 and commutating zone 9 to enter in heat transfer zone 8, inside heat transfer zone 8
Heat exchanger tube contact, separation liquid in the heat transfer zone 8 after heat exchange, from the separation liquid outlet 23 positioned at 8 bottom of heat transfer zone
Discharge detaches liquid and realizes heat exchange function at this time；
Step 8：Booster pump 5 passes through 61 note of coolant inlet by the heat exchanging liquid part that liquid outlet 23 is discharged is detached
In the areas Ru Daoxuanmo 6, another part is injected by water return outlet 13 in vacuum pump ontology 1, realizes the repetition profit of separation liquid
With；
Step 9：Heat exchanging liquid is first entered from heat exchange liquid import 24 in heat transfer zone 8, is then flowed into from lower heat exchanger tube 85
Upper heat exchanger tube 84, finally from 25 discharge of heat exchange liquid outlet, in the process, the heat exchanging liquid in lower heat exchanger tube 85 and upper heat exchanger tube
Heat exchanging liquid in 84 can be contacted with the separation liquid in heat transfer zone 8, and heat exchanging liquid realizes heat exchange function.
In actual work, with the pending high temperature air-water mixture described in step 2 by pump housing material inlet into
After entering in vacuum pump ontology, the high temperature air-water mixture pass through the air admission hole on distribution plate directly with the pendular ring in step 2
It is in contact, pendular ring temperature gradually rises at this time.
In actual work, coolant liquid can form rotation film after entering rotating-film tube in the areas Xuan Mo, and rotation film can reduce gas flow temperature,
The separative efficiency of separation gas and separation liquid in moisture trap can be improved.
In actual work, from separation liquid outlet in out coolant liquid through multiple water return outlets directly with the lateral surface of pendular ring
The high-temp liquid of the medial surface of pendular ring, is directly pressed into pump housing material outlet by contact；
Present invention eliminates external plate heat exchangers, and are integrated with tube built-in heat exchanger in tank base, form
A kind of horizontal moisture trap built in heat exchanger；Separation liquid outlet be connected to coolant inlet by increasing pump after, from divide
It can constantly be entered in rotating-film tube by coolant inlet from the coolant liquid in liquid outlet out, and then stream can be reduced
Enter the temperature of the liquid in gas-water separation zone.It is connected to booster pump in the tail portion of horizontal moisture trap, booster pump passes through several
Root pipeline is connected to water return outlet, meanwhile, it is in addition connect again with coolant inlet by several pipelines on booster pump, to improve
Separative efficiency reduces the terminal temperature difference at heat exchanger.
As shown in Figure 1, Figure 3：Difference lies in have changed return water with conventional return water mode for return water mode of the present invention
Mouthful position and quantity, at the same time system be additionally arranged booster pump, cause when ambient temperature variation or equipment needed for operating mode hair
When raw change, vacuum pump fluid return water amount can accordingly be adjusted according to operating condition.In addition to this, make booster pump and cooling
Water inlet is connected to, and can reduce the gas flow temperature that moisture trap is entered from vacuum pump ontology, is conducive to improve air water point
From efficiency, and the mean temperature of heat transfer process in built-in heat exchanger is reduced, improves heat exchange efficiency, increase the economy of system.
With reference to shown in Fig. 3：Present invention employs the horizontal moisture traps of built-in heat exchanging type, advantageously reduce vacuum pump return water
The space of system keeps the arrangement of vacuum pump return water system more flexible and convenient.
With reference to shown in Fig. 2：Conventional return water mode does not have barrel backwater structure and the adjusting work(for different operating modes
Can, within the system vacuum pump cooling work liquid by original water return outlet carry out water supply, coolant liquid (cryogenic liquid) be via
Original water return outlet initially enters the adjacent two interlobate elementary volume, volume element of impeller, then enters in pendular ring under the influence of centrifugal force
Side starts mass-and heat-transfer.Under the high-speed rotation of impeller, coolant liquid moves to gas vent (draining) heel row by original water return outlet
It is external to go out vacuum pump sheet.
The heat exchange that the heat transfer process of the above-mentioned prior art is only limitted between liquid is only limitted to pendular ring inner side edge interlayer, and cooling
Liquid residence time in pendular ring is short, and heat exchange is insufficient, and cryogenic liquid does not exchange heat fully and vacuum just is discharged by gas vent (draining)
This is external for pump, and high-temp liquid of the pendular ring close to barrel side does not obtain effective temperature-reducing or displacement.So as to cause pendular ring temperature
The problems such as degree is difficult to decline, and vacuum pump working efficiency is low, and exhaust capacity declines, cavitation.
Effective utilization-heat transfer unit method is calculated separately into conventional return water mode and this programme direct replacement mode below
Pendular ring temperature after heat exchange amount Q, heat exchange, supercharging return water draw be connected to separator inlet after the temperature of steam flow and built-in in separator
The mean temperature of heat exchanger heat transfer process.
Known pendular ring flow, return water initial temperature and pendular ring initial temperature, and five groups of difference circling water flow rates are given, specific initial value is such as
Shown in lower：
1 initial calculation parameter of table
The expansion of semi-circular heat-transfer surface and equivalency transform for flowing through return water for convenience of calculating exchange heat for tablet, the specific heat of water
cp=4200J/ (kg DEG C).
For conventional water return method, tablet downstream heat transfer mode, the heat exchange between return water and working solution can be equivalent to
It is zero that face, which is considered as thermal resistance, i.e. return water and working solution direct contact heat transfer.It can be obtained by Newtonian Cooling quantitative analysis, the calculating of heat exchange amount
Formula is as follows：
Q=qm1cp(t1″-t1')=qm2cp(t2′-t2") (formula 1)
Q=kA Δs tm(formula 2)
Nu=0.023Re0.8Prb(formula 4)
In formula, Q is heat exchange amount, qm1For circling water flow rate, qm2For pendular ring flow, CpFor specific heat capacity, t1" return water after for heat exchange
Temperature, t2" temperature of pendular ring after for heat exchange, k is Composite Walls, Δ tmFor the mean temperature difference that exchanges heat, h is heat convection system
Number.For downstream heat transfer, the calculating formula of efficiency is as follows：
To formula 6, effectiveness-heat transfer unit method has found out the heat exchange under different circling water flow rates for comprehensive known conditions and formula 1
Amount and outlet temperature, as shown in table 2.
The conventional return water mode result of calculation of table 2
| Serial number | Circling water flow rate (kg/s) | Heat exchange amount Q (KW) | Pendular ring temperature (DEG C) |
| 1 | 6.285 | 449.97 | 37.60 |
| 2 | 6.174 | 412.47 | 37.81 |
| 3 | 5.758 | 337.48 | 38.23 |
| 4 | 5.259 | 206.24 | 38.91 |
| 5 | 4.662 | 112.49 | 39.39 |
For the heat exchange mode of this programme direct replacement, 40 DEG C of pendular ring of equivalent is replaced with 15 DEG C of return water every time,
In conjunction with primary condition and formula 1 to formula 6, the heat exchange amount Q under different circling water flow rates and outlet temperature such as 3 institute of table is finally calculated
Show.
3 direct replacement mode result of calculation of table
| Serial number | Circling water flow rate (kg/s) | Heat exchange amount Q (KW) | Pendular ring temperature (DEG C) |
| 1 | 6.285 | 659.94 | 36.48 |
| 2 | 6.174 | 633.74 | 36.62 |
| 3 | 5.758 | 604.60 | 36.78 |
| 4 | 5.259 | 552.16 | 37.05 |
| 5 | 4.662 | 489.51 | 37.49 |
The return water mode of the present invention is with conventional return water mode heat exchange amount comparing result as shown in figure 9, pendular ring temperature comparisons tie
Fruit is as shown in Figure 10.
After direct replacement mixed heat transfer, heat exchanger is entered out of the steam flow temperature of vacuum pump outlet discharge, separator
When backwater temperature difference and being drawn with booster pump when connecing at cooling backwater to separator supercharging cooling water inlet all the way, in separator into
Temperature of the backwater temperature difference under different circling water flow rates and the flow that draws water when entering heat exchanger is as shown in table 4 and table 5.
Backwater temperature difference in tank when accessing cooling water to separator inlet under 4 different flow of table
Flux unit kg/s, temperature unit DEG C
Backwater temperature difference in tank when not connecing cooling water to separator inlet under 5 different flow of table
Temperature difference when return water enters heat exchanger in two kinds of return water mode separators compares as shown in figure 11.
Result of calculation shows a kind of liquid ring vacuum pump fluid return water mode disclosed by the invention under identical circling water flow rate
The more conventional return water mode bigger of its heat exchange amount, pendular ring mean temperature is lower, and separately connect from booster pump all the way return water after cooling to
At separator inlet, separator inlet steam flow can be precooled, improve gas-water separation efficiency, reduce return water into heat exchanger with
The temperature difference of heat exchanger cooling water, no matter therefore the heat exchange efficiency of pendular ring working solution or the more conventional return water of the heat exchange efficiency of heat exchanger
Mode is obviously improved.
Other unaccounted parts belong to the prior art.
Claims (10)
1. the boosting type liquid-ring vacuum pump return water system with rotation film, including vacuum pump ontology (1), moisture trap (2), into object
Expects pipe (3) and go out materail tube (4)；
Vacuum pump ontology (1) upper end is equipped with pump housing material inlet (11) and pump housing material outlet (12), vacuum pump ontology (1)
Lower end is equipped with water return outlet (13), and moisture trap (2) upper end is equipped with separator material inlet (21) and separated gas outlet
(22), moisture trap (2) lower end is equipped with separation liquid outlet (23), heat exchange liquid import (24) and heat exchange liquid outlet (25)；
It is described to be mounted on vacuum pump ontology (1) into materail tube (3) and be connected to pump housing material inlet (11), it is described go out materail tube
(4) one end is mounted on vacuum pump ontology (1) and is connected to pump housing material outlet (12), and the other end is mounted on moisture trap
(2) it is connected on and with separator material inlet (21)；
It is characterized in that：
Further include booster pump (5), the outer upper ends of the moisture trap (2) are equipped with the areas Xuan Mo (6), moisture trap (2)
It is internally provided with gas-water separation zone (7), heat transfer zone (8) and commutating zone (9), gas-water separation zone (7) and commutating zone (9) are respectively positioned on air water
Separator (2) upper end, heat transfer zone (8) are located at moisture trap (2) lower end；
Coolant inlet (61) is installed on the shell of the areas Xuan Mo (6), be equipped in the areas Xuan Mo (6) with it is described go out materail tube
(4) tube wall of the rotating-film tube (62) being connected to, rotating-film tube (62) is equipped with the fenestra (63) that water supply stream passes through, the rotating-film tube
(62) it is connected to gas-water separation zone (7), separated gas outlet (22) is connected to commutating zone (9), is detached liquid outlet (23) and is changed
Hot-zone (8) is connected to；
It is equipped between the gas-water separation zone (7) and commutating zone (9) positioned at the internal deflector (26) of moisture trap (2),
Deflector (26) be equipped with for separation gas by gas phase channel (27), heat transfer zone (8) upper end be equipped be mounted on air water
The internal annular partition (28) of separator (2), and gas-water separation zone (7) lower end and commutating zone (9) lower end on heat transfer zone (8)
End connection,
The heat exchange partition board (81) being connect with the inner wall of moisture trap (2) is installed, exchange heat partition board inside the heat transfer zone (8)
(81) heat transfer zone (8) are divided into the upper heat transfer zone (82) positioned at heat exchange partition board (81) upper end, and positioned at heat exchange partition board (81)
The lower heat transfer zone (83) of lower end, the upper heat transfer zone (82) is interior to be equipped with several upper heat exchanger tubes (84), is equipped in lower heat transfer zone (83)
Several lower heat exchanger tubes (85),
The water outlet of the lower heat exchanger tube (85) is connected to the water inlet of upper heat exchanger tube (84)；The heat exchange liquid import (24) is located at
Exchange heat partition board (81) lower section, and is connected to the water inlet of lower heat exchanger tube (85)；The heat exchange liquid outlet (25) is located at heat exchange partition board
(81) it between annular partition (28), and is connected to the water outlet of upper heat exchanger tube (84)；
The input terminal of the booster pump (5) is connected to liquid outlet (23) is detached, output end and the water return outlet of booster pump (5)
(13) and coolant inlet (61) is connected to.
2. the boosting type liquid-ring vacuum pump return water system according to claim 1 with rotation film, it is characterised in that：Described
Fenestra (63) center line is in the horizontal direction outer skinning point of contact with the intersection point of rotating-film tube (62) outer wall, and outer skinning point of contact is in skinning
It is outer skinning tangent line to manage the tangent line on (62) outer wall, and the angle between the outer skinning tangent line and the center line for playing fenestra (63) is
15~60 °, the angle risen between the center line and horizontal plane of fenestra (63) is 5~20 °.
3. the boosting type liquid-ring vacuum pump return water system according to claim 2 with rotation film, it is characterised in that：Described
Fenestra (63) center line is in the horizontal direction interior skinning point of contact with the intersection point of rotating-film tube (62) inner wall, and outer skinning point of contact is located at interior
Above skinning point of contact, the angle between the outer skinning tangent line and the center line for playing fenestra (63) is 30 °, is risen in fenestra (63)
Angle between heart line and horizontal plane is 10 °.
4. the boosting type liquid ring vacuum pump return water system with rotation film according to any one of claims 1 to 3 claim
System, it is characterised in that：Contact position of water return outlet (13) center line in the horizontal direction with vacuum pump ontology (1) outer wall is back
Water point of contact, tangent line of the return water point of contact on the outer wall of vacuum pump ontology (1) are return water tangent line, the return water tangent line and return water
The centerline parallel of mouth (13).
5. the boosting type liquid-ring vacuum pump return water system according to claim 4 with rotation film, it is characterised in that：Described
Water return outlet (13) has multiple and is arranged in permutation on vacuum pump ontology (1), and water return outlet (13) is that cavernous structure or axial direction are band-like
Structure.
6. the boosting type liquid-ring vacuum pump return water system according to claim 5 with rotation film, it is characterised in that：The gas
The cross section of the shell of separator (2) is ellipse, and the gas phase channel (27) is multiple leading of being arranged on deflector (26)
Discharge orifice, the separation liquid outlet and heat exchange liquid import (24) are to be adjacently positioned.
7. the boosting type liquid-ring vacuum pump return water system according to claim 6 with rotation film, it is characterised in that：It is described cold
But there are two liquid entrances (61), there are two rotating-film tubes (62), and described two rotating-film tubes (62) are located at described two coolant inlets
(61) between.
8. the water return method of the boosting type liquid-ring vacuum pump return water system according to claim 1 with rotation film, feature
It is, it is comprised the technical steps that,
Step 1：Working solution is passed into vacuum pump ontology (1), and so that working solution is existed by impeller (14) and distribution plate (15)
Pendular ring (16) is formed in vacuum pump ontology (1)；
Step 2：Pending high temperature air-water mixture is fed into vacuum pump ontology (1), pending high temperature air water is made
Mixture is entered in pendular ring (16) across distribution plate (15) and is contacted with pendular ring (16), pendular ring (16) and pending High Temperature Gas
The substance formed after aqueous mixtures mixing is the first air-water mixture；
Step 3：First air-water mixture is discharged by the gas vent on distribution plate (15), and enters out materail tube (4), so
After extend materail tube (4) and be flowed into rotating-film tube (62)；
Step 4：Coolant liquid is injected into the areas Xuan Mo (6) by coolant inlet (61), the coolant liquid in the areas Xuan Mo (6) passes through
It plays fenestra (63) to enter in rotating-film tube (62) and mix with the first air-water mixture, coolant liquid and the mixing of the first air-water mixture
Substance afterwards is the second air-water mixture；
Step 5：Second air-water mixture enters moisture trap (2) inside across the areas Xuan Mo (6), and in gas-water separation zone
(7) gas-water separation is carried out in, the second air-water mixture is separated into separation gas and separation liquid at this time；
Step 6：The separation gas initially passes through the gas phase channel (27) between gas-water separation zone (7) and commutating zone (9),
It is interior then into commutating zone (9), it is finally internal after over commutation in commutating zone (9), from the separation gas being connected to commutating zone (9)
Body exports (22) discharge；
Step 7：Separation liquid passes through gas-water separation zone (7) and commutating zone (9) to enter in heat transfer zone (8), with heat transfer zone (8)
Internal heat exchanger tube contact, separation liquid is interior after heat exchange in heat transfer zone (8), from the separating liquid positioned at heat transfer zone (8) bottom
Body exports (23) discharge, detaches liquid at this time and realizes heat exchange function；
Step 8：Booster pump (5) will detach the heat exchanging liquid part that liquid outlet (23) is discharged and pass through coolant inlet (61)
It is injected into the areas Xuan Mo (6), another part is injected by water return outlet (13) in vacuum pump ontology (1), realizes separation liquid
Recycling；
Step 9：Heat exchanging liquid is first entered from heat exchange liquid import (24) in heat transfer zone (8), is then flowed into from lower heat exchanger tube (85)
To upper heat exchanger tube (84), be finally discharged from heat exchange liquid outlet (25), in the process, heat exchanging liquid in lower heat exchanger tube (85) and
Heat exchanging liquid in upper heat exchanger tube (84) can be contacted with the separation liquid in heat transfer zone (8), and heat exchanging liquid realizes heat exchange function.
9. the water return method of the boosting type liquid-ring vacuum pump return water system according to claim 8 with rotation film, feature
It is：It is in the horizontal direction outer skinning point of contact with the intersection point of rotating-film tube (62) outer wall to play fenestra (63) center line, and outer skinning is cut
Tangent line of the point on rotating-film tube (62) outer wall is outer skinning tangent line, the folder between outer skinning tangent line and the center line for playing fenestra (63)
Angle is 15~60 °, and the angle risen between the center line and horizontal plane of fenestra (63) is 5~20 °.
10. the water return method of the boosting type liquid-ring vacuum pump return water system according to claim 9 with rotation film, feature
It is：It is in the horizontal direction interior skinning point of contact with the intersection point of rotating-film tube (62) inner wall to play fenestra (63) center line, and outer skinning is cut
Point is located above interior skinning point of contact, and the angle between outer skinning tangent line and the center line for playing fenestra (63) is 30 °, plays fenestra (63)
Center line and horizontal plane between angle be 10 °.
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| CN106959021A (en) * | 2017-05-15 | 2017-07-18 | 中国电力工程顾问集团中南电力设计院有限公司 | A kind of skinning condensate vacuum system |
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| CN111852870A (en) * | 2020-05-06 | 2020-10-30 | 中国电力工程顾问集团中南电力设计院有限公司 | Coal-fired power plant vacuum pump multistage cooling water system and cooling method |
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