CN114857952A - Vacuum system based on condenser and roots vacuum pump - Google Patents
Vacuum system based on condenser and roots vacuum pump Download PDFInfo
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- CN114857952A CN114857952A CN202110074719.XA CN202110074719A CN114857952A CN 114857952 A CN114857952 A CN 114857952A CN 202110074719 A CN202110074719 A CN 202110074719A CN 114857952 A CN114857952 A CN 114857952A
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- vacuum pump
- roots vacuum
- condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The invention provides a vacuum system based on a condenser and a Roots vacuum pump, which comprises an inlet condenser, wherein the inlet condenser comprises an inlet end for receiving steam input by an external air-cooled generator set, and the inlet condenser condenses condensable gas in the steam and outputs the residual gas outwards; the Roots vacuum pump set comprises at least one Roots vacuum pump; the Roots vacuum pump set also comprises an input end and an output end, and the input end is connected with the inlet condenser; the gas output by the inlet condenser is input into the at least one Roots vacuum pump through the input end to be compressed, and then is output outwards from the output end; and the output end of the Roots vacuum pump set is connected to the backing pump through an output pipeline, and the backing pump is used for receiving the gas output by the Roots vacuum pump set.
Description
Technical Field
The present invention relates to a vacuum pumping system, and more particularly to a vacuum system based on a condenser and a roots vacuum pump.
Background
At present, in a power plant, a power generator set can be divided into a water-cooled power generator set and an air-cooled power generator set, wherein the air-cooled type of the air-cooled power generator set can be divided into direct air-cooled type and indirect air-cooled type, the indirect air-cooled power generator set is provided with a condenser, and the direct air-cooled power generator set is not provided with a condenser. The air-cooled generator set needs to operate under vacuum, so a vacuum maintaining system is needed to generate the vacuum. The vacuum maintaining system of the air-cooled generator set usually uses a liquid ring vacuum pump system, and the liquid ring vacuum pump is applied to meet the requirement of maintaining vacuum.
However, the liquid ring vacuum pump system of the air-cooled generator set in the prior art mainly uses a single liquid ring vacuum pump, which requires a relatively high power consumption and a relatively large amount of water. And the liquid ring vacuum pump system is bulky and needs to occupy a large area. Moreover, the liquid ring vacuum pump has high noise and high maintenance cost when in use. And thus, use in a power plant causes disadvantages of occupying a large amount of space and requiring high costs.
Moreover, when the vacuum degree of the liquid ring vacuum pump used in most power plants is gradually increased, the air pumping capacity of the liquid ring vacuum pump begins to be reduced, and cavitation is generated. Particularly, when the temperature is high in summer, the liquid ring vacuum pump is more prone to cavitation erosion, so that the air extraction capacity of the liquid ring vacuum pump is greatly reduced, the vacuum state of the air-cooled generator set is poor, the efficiency of a steam turbine of the generator set is further reduced, and the power generation coal consumption is increased.
Therefore, the present invention is directed to a novel vacuum system based on a condenser and a roots vacuum pump to overcome the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a vacuum system based on a condenser and a roots vacuum pump. Therefore, the system of the invention can not only reduce the energy consumption of the power plant system, but also reduce the overall maintenance cost, save water resources and achieve the purpose of environmental protection, which cannot be achieved by the prior art.
In order to achieve the above object, the present invention provides a vacuum system based on a condenser and a roots vacuum pump, comprising an inlet condenser, the inlet condenser comprising an inlet end for receiving steam input by an external air-cooled generator set, the inlet condenser condensing condensable gas in the steam and outputting the remaining gas outwards; the Roots vacuum pump set comprises at least one Roots vacuum pump; the Roots vacuum pump set also comprises an input end and an output end, and the input end is connected with the inlet condenser; the gas output by the inlet condenser is input into the at least one Roots vacuum pump through the input end to be compressed, and then is output outwards from the output end; and the output end of the Roots vacuum pump set is connected to the backing pump through an output pipeline, and the backing pump is used for receiving the gas output by the Roots vacuum pump set.
Preferably, the inlet condenser is connected with a liquid collecting tank, and the liquid collecting tank is used for collecting condensed liquid generated after the condensable gas in the inlet condenser is condensed, so that the condensed liquid can be recycled.
More preferably, the liquid collection tank is a collection tank capable of collecting the liquid in a vacuum state.
Preferably, the inlet end of the inlet condenser is capable of withstanding a pressure of greater than ten thousand pascals.
Preferably, the vacuum system further comprises a heat exchanger, the heat exchanger is connected in series to the output pipeline, and the heat exchanger is used for cooling the overflowing gas output by the roots vacuum pump set and inputting the cooled gas into the backing pump.
Preferably, each roots vacuum pump is a roots vacuum pump capable of withstanding a pressure differential of ten thousand or tens of thousands of pascals.
Preferably, each roots vacuum pump is a two-blade roots vacuum pump or a three-blade roots vacuum pump or an air-cooled roots vacuum pump.
Preferably, each roots vacuum pump is connected with a first motor mechanism and used for driving each corresponding roots vacuum pump; the backing pump is connected with a second motor mechanism for driving the backing pump.
Preferably, the roots vacuum pump set is provided with a plurality of roots vacuum pumps which are connected in series, and the gas output by the inlet condenser is sequentially compressed in multiple stages through the plurality of roots vacuum pumps; two adjacent roots vacuum pumps are connected in series by a gas pipeline.
Preferably, the backing pump is a vacuum pump in direct atmospheric.
Preferably, the backing pump is a liquid ring pump or a vapor jet pump or an atmospheric jet pump or a water flush pump.
Preferably, when the input gas pressure of the roots vacuum pump in the roots vacuum pump set is greater than a certain value, the backing pump is not operated, and the gas output by the roots vacuum pump set directly passes through the interior of the backing pump and is exhausted outwards.
Preferably, a bellows is connected in series with the output pipeline, so that the output pipeline keeps sealed.
A further understanding of the nature and advantages of the present invention may be realized by reference to the following description when read in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the combination of elements of the present invention;
FIG. 2 is a schematic view of another embodiment of the present invention;
FIG. 3 is a schematic view of another embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention.
Referring to fig. 1 to 3, a vacuum system based on a condenser and a roots vacuum pump according to the present invention is shown, which comprises the following components:
an inlet condenser 10, including an inlet end 11, the inlet end 11 being used for receiving the steam input by the external air-cooled generator set 1, the inlet condenser being capable of condensing the condensable gas in the steam and outputting the remaining gas outwards; wherein the condensation of condensable gases in the steam by the inlet condenser 10 reduces the volume of the steam to reduce the amount of gas required to enter the back-end components. Wherein the inlet end 11 of the inlet condenser 10 can withstand a gas pressure of more than ten thousand Pa (pascal), preferably several tens of thousand Pa (pascal). The inlet condenser 10 may be any type of condenser. Wherein the air-cooled generator set 1 can be an indirect air-cooled generator set with a condenser or a direct air-cooled generator set without a condenser.
Wherein the inlet condenser 10 is connected to a liquid collecting tank 20, and the liquid collecting tank 20 is used for collecting condensed liquid (e.g. water) generated after the condensable gas in the inlet condenser 10 is condensed, and the condensed liquid can be recycled. The collection tank 20 may be any type of collection tank that can collect liquid under vacuum.
A Roots vacuum pump unit 30, which comprises at least one Roots vacuum pump 40; the roots vacuum pump unit 30 further comprises an input end 31 and an output end 32, wherein the input end 31 is connected with the inlet condenser 10; the gas output from the inlet condenser 10 is input into the at least one roots vacuum pump 40 through the input end 31 to be compressed, and then is output from the output end 32. Each roots vacuum pump 40 may be any type of roots vacuum pump 40, preferably a roots vacuum pump 40 that can withstand a large differential pressure of ten thousand or several thousand Pa (pascal), such as a two-lobe roots vacuum pump, a three-lobe roots vacuum pump, an air-cooled roots vacuum pump, or a multi-stage roots vacuum pump.
Wherein each roots vacuum pump 40 is connected with a first motor mechanism 45 for driving each corresponding roots vacuum pump 40.
As shown in fig. 1, the at least one roots vacuum pump 40 of the roots vacuum pump set 30 is a single roots vacuum pump 40.
As shown in fig. 2, the roots vacuum pump unit 30 is a plurality of roots vacuum pumps 40, the plurality of roots vacuum pumps 40 are connected in series, and the gas output from the inlet condenser 10 is sequentially compressed in multiple stages by the plurality of roots vacuum pumps 40. The gas pipeline 41 is used for connecting two adjacent roots vacuum pumps 40 in series.
The at least one roots vacuum pump 40 includes one roots vacuum pump 40 or a plurality of roots vacuum pumps 40 may be used to share the pressure difference, so that the installed power of the overall system may be reduced and the water consumption may be reduced.
A backing pump 50, the output 32 of the roots vacuum pump set 30 being connected to the backing pump 50 by an output line 33, the backing pump 50 being adapted to receive gas output from the roots vacuum pump set 30. The backing pump 50 may be any type of backing pump 50, preferably a vacuum pump that can vent to the atmosphere, such as a liquid ring pump, a vapor jet pump, an atmospheric jet pump, or a water jet pump.
Wherein the backing pump 50 is connected to a second motor mechanism 55 for driving the backing pump 50.
With the above-described structure, the gas from the inlet condenser 10 is compressed by the roots vacuum pump unit 30, so that the gas volume is reduced, and therefore the amount of gas to be pumped by the backing pump 50 can be reduced. When the input gas pressure of the roots vacuum pump 40 in the roots vacuum pump set 30 is greater than a specific value, the backing pump 50 may not be operated, and the gas output by the roots vacuum pump set 30 directly passes through the backing pump 50 and is discharged, so that the energy saving purpose can be achieved because the backing pump 50 is not operated.
And the heat exchanger 60 is connected in series on the output pipeline 33, and the heat exchanger 60 is used for cooling the overflowing gas output by the roots vacuum pump set 30 and inputting the cooled gas to the backing pump 50. The heat exchanger 60 may be any type of heat exchanger 60.
A bellows 80 can be connected in series to the output line 33, so that the output line 33 can be kept sealed.
As shown in fig. 3, the present invention further includes a rack 70 connecting the roots vacuum pump unit 30 and the backing pump 50, wherein the rack 70 is used for supporting the roots vacuum pump unit 30 and the backing pump 50. Preferably, the frame 70 comprises a formed steel weldment.
The vacuum maintaining system has the advantages that the vacuum pumping system consisting of the condenser, the Roots vacuum pump and the backing pump can be used as the vacuum maintaining system of the air-cooled generator set of the power plant, the structure of the vacuum maintaining system can greatly reduce the power consumption and the water consumption of the vacuum maintaining system of the air-cooled generator set of the power plant, and the condensed water can be recycled through the liquid collecting tank. Therefore, the system of the invention can not only reduce the energy consumption of the power plant system, but also reduce the overall maintenance cost, can save water resources and achieve the aim of environmental protection, which can not be achieved by the prior art.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Claims (13)
1. The utility model provides a vacuum system based on condenser and roots vacuum pump which characterized in that includes:
the inlet condenser comprises an inlet end, the inlet end is used for receiving steam input by an external air-cooled generator set, and the inlet condenser can condense condensable gas in the steam and output the residual gas outwards;
the Roots vacuum pump set comprises at least one Roots vacuum pump; the Roots vacuum pump set also comprises an input end and an output end, and the input end is connected with the inlet condenser; the inlet condenser can input the gas output by the inlet condenser into the at least one roots vacuum pump through the input end for compression, and the output end is used for outputting the gas compressed by the at least one roots vacuum pump outwards; and the output end of the Roots vacuum pump set is connected to the backing pump through an output pipeline, and the backing pump is used for receiving the gas output by the Roots vacuum pump set.
2. The vacuum system based on condenser and roots vacuum pump as claimed in claim 1, wherein the inlet condenser is connected with a liquid collecting tank for collecting condensed liquid generated after the condensable gas in the inlet condenser is condensed, so as to be recycled.
3. The condenser-based roots vacuum pump vacuum system as claimed in claim 2, wherein the collection tank is a collection tank capable of collecting liquid in a vacuum state.
4. The condenser and roots vacuum pump based vacuum system of claim 1, wherein the inlet end of the inlet condenser is capable of withstanding a gas pressure greater than ten thousand pascals.
5. The condenser and roots vacuum pump-based vacuum system as claimed in claim 1, further comprising a heat exchanger connected in series to the output line, the heat exchanger being configured to cool the excess flow gas output from the roots vacuum pump set and to input the cooled gas to the backing pump.
6. The condenser and roots vacuum pump-based vacuum system of claim 1, wherein each roots vacuum pump is a roots vacuum pump capable of withstanding a pressure differential of ten or several tens of thousands of pascals.
7. The condenser-and-roots vacuum pump-based vacuum system of claim 1, wherein each roots vacuum pump is a two-lobe roots vacuum pump or a three-lobe roots vacuum pump or an air-cooled roots vacuum pump.
8. The condenser and roots vacuum pump based vacuum system as claimed in claim 1, wherein each roots vacuum pump is connected to a first motor mechanism for driving the corresponding roots vacuum pump; the backing pump is connected with a second motor mechanism for driving the backing pump.
9. The condenser and roots vacuum pump based vacuum system as claimed in claim 1, wherein the roots vacuum pump set is a plurality of roots vacuum pumps connected in series, the gas output from the inlet condenser is sequentially compressed in multiple stages by the plurality of roots vacuum pumps; two adjacent roots vacuum pumps are connected in series by a gas pipeline.
10. A vacuum system based on a condenser and roots vacuum pump as claimed in claim 1, wherein the backing pump is a vacuum pump in direct atmospheric.
11. The condenser and roots vacuum pump based vacuum system as claimed in claim 1, wherein the backing pump is a liquid ring pump or a vapor jet pump or an atmospheric jet pump or a water jet pump.
12. The condenser-based roots vacuum pump vacuum system as claimed in claim 1, wherein when the input gas pressure of the roots vacuum pump in the roots vacuum pump set is greater than a certain value, the backing pump is not operated, so that the gas output by the roots vacuum pump set is directly exhausted from the interior of the backing pump.
13. The condenser and roots vacuum pump based vacuum system as claimed in claim 1, wherein a bellows is further connected in series to the output line to maintain the output line sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074719.XA CN114857952A (en) | 2021-01-20 | 2021-01-20 | Vacuum system based on condenser and roots vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074719.XA CN114857952A (en) | 2021-01-20 | 2021-01-20 | Vacuum system based on condenser and roots vacuum pump |
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| Publication Number | Publication Date |
|---|---|
| CN114857952A true CN114857952A (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110074719.XA Pending CN114857952A (en) | 2021-01-20 | 2021-01-20 | Vacuum system based on condenser and roots vacuum pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024103424A1 (en) * | 2022-11-15 | 2024-05-23 | 岳阳景嘉化工有限公司 | Cryogenic exhaust gas removal material apparatus |
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2021
- 2021-01-20 CN CN202110074719.XA patent/CN114857952A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024103424A1 (en) * | 2022-11-15 | 2024-05-23 | 岳阳景嘉化工有限公司 | Cryogenic exhaust gas removal material apparatus |
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