CN209430409U - A kind of vacuum pump system - Google Patents
A kind of vacuum pump system Download PDFInfo
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- CN209430409U CN209430409U CN201821497117.5U CN201821497117U CN209430409U CN 209430409 U CN209430409 U CN 209430409U CN 201821497117 U CN201821497117 U CN 201821497117U CN 209430409 U CN209430409 U CN 209430409U
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- vacuum pump
- water
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- ring
- ring vacuum
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- Jet Pumps And Other Pumps (AREA)
Abstract
The utility model provides a kind of vacuum pump system, including vacuumizing main pipe, at least two water-ring vacuum pump A and the efficient vacuum pump being connected in parallel with water-ring vacuum pump A, the efficient vacuum pump includes the Roots vaccum pump being sequentially connected in series, intercondenser and water ring vacuum pump B, after institute's intake-gas enters intercondenser cooling after Roots vaccum pump is pressurized, most of water vapor condensation, on-condensible gas and a small amount of remaining water vapour are discharged through water ring vacuum pump B.The efficient vacuum pump formed is connected in series by Roots vaccum pump, intercondenser and water ring vacuum pump B by increasing in the utility model, both water ring pump cavitation, pumping performance decline can effectively have been solved the problems, such as, ultimate vacuum can also be improved simultaneously, solve the problems, such as that existing vacuum pump ultimate vacuum is low, and energy-saving effect is significant.
Description
Technical field
The utility model belongs to power plant steam turbine vacuum system technical field, and in particular to a kind of vacuum pump system.
Background technique
The vaccum-pumping equipment of power station steam turbine vacuum system is mainly water jet air ejector and water ring vacuum pump at present, especially
The Large-scale machine set of 300MW or more, generallys use water ring vacuum pump.These vaccum-pumping equipments, generally existing following problems:
1) energy consumption is high, low efficiency, and the efficiency of Water-ring vacuum is very low, and general only 30% or so；
2) type selecting is bigger than normal, special water ring vacuum pump, when design selection, main (30 points of response speed for considering quickly to open machine
Can reach in clock and open confidential null value of looking for the truth) and maximum permission air leakage as Type Selection Principle, but unit operate normally when, dimension
There is larger allowance when holding system vacuum；
3) water ring vacuum pump pumping performance is limited by the variation of work coolant-temperature gage
Practical pumping speed Qt=Q15K of water ring vacuum pump, K=(P1-Pt)/(P1-P15)
Sucking rate m3/h when Qt-water temperature is t DEG C
Sucking rate m3/h when Q15-water temperature is 15 DEG C
P1-water ring pump suction pressure KPa
Saturated vapour pressure KPa when Pt-water temperature is t DEG C
Saturated vapour pressure KPa when P15-water temperature is 15 DEG C
K-pumping quantity correction coefficient
When working water reaches 35 DEG C or more, exhaust capacity sharply declines 80% or more, this is because work coolant-temperature gage increases
Vaporization phenomenon has occurred under to Water-ring vacuum pump inlet pressure when corresponding saturation temperature, vacuum pump is mainly dealt with to be vaporized in extraction
Steam causes pumping ability of air to decline to a great extent；Meanwhile the raising for the coolant-temperature gage that works is larger to the ultimate vacuum value generation of vacuum pump
Influence --- this is because ultimate vacuum value is exactly saturation pressure corresponding to work coolant-temperature gage, this is to lead to condenser vacuum
The main reason for fluctuation；
4) water ring vacuum pump is influenced by cavitation phenomenons, and cost of equipment maintenance is high, also influences the safe operation of equipment；
5) ultimate vacuum is low, and the limiting pressure of water ring vacuum pump is 15 DEG C of water temperature of 3.3kPa(work), with work water temperature
Raising, ultimate vacuum reduces, causes in condenser on-condensible gas to be assembled, make heat transfer deterioration, design is not achieved in condenser vacuum
Value.
Summary of the invention
The utility model provides a kind of vacuum pump system, both can effectively solve water ring pump cavitation, pumping performance decline ask
Topic, while ultimate vacuum can also be improved, solve the problems, such as that existing vacuum pump ultimate vacuum is low, and energy-saving effect is significant.
The technical solution of the utility model is: a kind of vacuum pump system, including to vacuumize main pipe, at least two liquid-ring types true
Efficient vacuum pump sky pump A and be connected in parallel with water-ring vacuum pump A, the efficient vacuum pump include being sequentially connected in series
Roots vaccum pump, intercondenser and water ring vacuum pump B, institute's intake-gas after Roots vaccum pump is pressurized enter interstage condensation
After device is cooling, most of water vapor condensation, on-condensible gas and a small amount of remaining water vapour are discharged through water ring vacuum pump B.
Further, the efficient vacuum pump is equipped with isolating door with main pipe junction is vacuumized to scheme.
Further, the water-ring vacuum pump A number is 3 to scheme.
The utility model has the advantages that: in the utility model when high-efficient vacuumizing pump operation, steam and incondensable gas warp
Enter prime water ring pump, pressurization and interstage condensation due to Roots vaccum pump through intercondenser is cooling after Roots vaccum pump pressurization
The condensation of device so that water vapour condenses in intercondenser substantially, the latent heat of vaporization by intercondenser cooling water
It takes away, the gas of water ring vacuum pump B sucking is substantially incondensable gas；The pressurization of Roots vaccum pump simultaneously, makes Water-ring vacuum
The inlet pressure of pump B is enhanced about more than once, it is ensured that the operation of water ring vacuum pump B efficient stable；While high-efficient vacuumizing pump group
Ultimate vacuum is high, and within absolute pressure is up to 500Pa, and the ultimate vacuum of water ring vacuum pump can only achieve 3.3KPa absolute pressure, therefore high
Effect, which vacuumizes pump group, will not restrict unit back pressuce, be conducive to improve unit vacuum, reduce air cooling blower fan power consumption.Especially winter,
As ultimate vacuum can be improved using high-efficient vacuumizing vacuum pump group in further decreasing for back pressure, alleviate air-cooled countercurrent zone mistake
It is cold, effectively solve the problems, such as that Air-Cooling Island is antifreeze.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Wherein: 1, vacuumize main pipe, 2, water-ring vacuum pump A, 3, isolating door, 4, Roots vaccum pump, 5, intercondenser,
6, water ring vacuum pump B.
Specific embodiment
Clear and complete description is done to the utility model with reference to the accompanying drawing, so that those skilled in the art is not needing
Under conditions of making creative work, it can sufficiently implement the utility model.
Specific embodiment of the present utility model is: as shown in Figure 1, a kind of vacuum pump system, including vacuumize main pipe 1,
At least two water-ring vacuum pump A2 and the efficient vacuum pump being connected in parallel with water-ring vacuum pump A2, the high-efficiency vacuum
Pump includes Roots vaccum pump 4, intercondenser 5 and the water ring vacuum pump B6 being sequentially connected in series, and institute's intake-gas is true through Roots
After entering the cooling of intercondenser 5 after empty 4 pressurization of pump, most of water vapor condenses, on-condensible gas and a small amount of remaining water vapour warp
Water ring vacuum pump B6 discharge.
Preferably, the efficient vacuum pump is equipped with isolating door 3 with 1 junction of main pipe is vacuumized.
Preferably, the water-ring vacuum pump A2 number is 3.
The utility model improves in original vacuum system, and retaining original, there are three water-ring vacuum pumps, is vacuumizing
Aperture in main pipe is connected in parallel efficient vacuum pump, or Roots is connected in series on an original wherein water-ring vacuum pump
Vacuum pump and intercondenser can effectively solve the problems, such as water ring pump cavitation, pumping performance decline, while it is true to improve the limit
Sky solves the problems, such as that existing vacuum pump ultimate vacuum is low, and energy-saving effect is significant.
The preferred embodiment of the utility model is described above, it should be pointed out that the utility model not office
It is limited to above-mentioned particular implementation, devices and structures not described in detail herein should be understood as with the common side in this field
Formula is practiced；Anyone skilled in the art, in the case where not departing from technical solutions of the utility model ambit, foundation
The technical essence of the utility model any simple modifications, equivalents, and modifications made to the above embodiment still fall within this
In the range of the protection of utility model technical solution.
Claims (3)
1. a kind of vacuum pump system, which is characterized in that including vacuumizing main pipe, at least two water-ring vacuum pump A and and water
The efficient vacuum pump that ring vacuum pumps A is connected in parallel, the efficient vacuum pump include the Roots vaccum pump being sequentially connected in series, grade
Between condenser and water ring vacuum pump B, institute's intake-gas enter after Roots vaccum pump is pressurized intercondenser it is cooling after, it is most of
Water recovery, on-condensible gas and a small amount of remaining water vapour are discharged through water ring vacuum pump B.
2. a kind of vacuum pump system according to claim 1, which is characterized in that the efficient vacuum pump connects with main pipe is vacuumized
It meets place and is equipped with isolating door.
3. a kind of vacuum pump system according to claim 1, which is characterized in that the water-ring vacuum pump A number is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821497117.5U CN209430409U (en) | 2018-09-13 | 2018-09-13 | A kind of vacuum pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821497117.5U CN209430409U (en) | 2018-09-13 | 2018-09-13 | A kind of vacuum pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209430409U true CN209430409U (en) | 2019-09-24 |
Family
ID=68006852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821497117.5U Active CN209430409U (en) | 2018-09-13 | 2018-09-13 | A kind of vacuum pump system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209430409U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608867A (en) * | 2019-10-30 | 2019-12-24 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height simulation method |
| CN110617938A (en) * | 2019-10-30 | 2019-12-27 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height simulation system |
| CN110749413A (en) * | 2019-10-30 | 2020-02-04 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height analog control system |
| WO2022142603A1 (en) * | 2020-12-30 | 2022-07-07 | 广州亚俊氏真空科技股份有限公司 | Vacuum pumping system and vacuum packaging machine comprising same |
-
2018
- 2018-09-13 CN CN201821497117.5U patent/CN209430409U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608867A (en) * | 2019-10-30 | 2019-12-24 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height simulation method |
| CN110617938A (en) * | 2019-10-30 | 2019-12-27 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height simulation system |
| CN110749413A (en) * | 2019-10-30 | 2020-02-04 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height analog control system |
| WO2022142603A1 (en) * | 2020-12-30 | 2022-07-07 | 广州亚俊氏真空科技股份有限公司 | Vacuum pumping system and vacuum packaging machine comprising same |
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