CN216044255U - Front-mounted coagulation double-tank two-stage vacuum pump set - Google Patents
Front-mounted coagulation double-tank two-stage vacuum pump set Download PDFInfo
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- CN216044255U CN216044255U CN202121705138.3U CN202121705138U CN216044255U CN 216044255 U CN216044255 U CN 216044255U CN 202121705138 U CN202121705138 U CN 202121705138U CN 216044255 U CN216044255 U CN 216044255U
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Abstract
The utility model discloses a preposed coagulation double-tank two-stage vacuum pump set, wherein gas-water inlets arranged at the tops of a primary vacuum pump (2) and a secondary vacuum pump (4) are communicated with a gas-water outlet arranged at the top of a preposed coagulation tank (1) arranged at one side through pipelines, exhaust ports arranged at one sides of the primary vacuum pump (2) and the secondary vacuum pump (4) are communicated with gas inlets arranged at two sides of a gas-water separator (6), and a working liquid outlet arranged at the bottom of the gas-water separator (6) is communicated with a working liquid inlet arranged at one side of a heat exchanger (7) through a pipeline.
Description
Technical Field
The utility model relates to the technical field of energy and chemical engineering, in particular to a front-mounted coagulation double-tank two-stage vacuum pump set.
Background
The vacuum pump has been applied in coal-fired power plants for more than 30 years since the 80 s, and the advantages of mature technology, high national production rate and the like cause the vacuum pump to be used as the main equipment of a condenser vacuum pumping system for long time.
The model selection standards of the vacuum pump equipment of the coal-fired power plant in China are all derived from the American HEI standard, the minimum air extraction rate of a vacuum pump is given according to the estimated non-condensable gas generation rate of the system and the air leakage rate of a condenser, and the condenser of a unit is required to establish vacuum within 30 minutes. The vacuum pump selected according to the standard has large air extraction amount and is quick to establish vacuum; years of practice prove that after the vacuum is established in the unit, the air pumping amount required by the unit in normal operation is far less than the limit value set by the HEI standard.
Based on the reasons, a part of power plants adopt a running mode of a big pump and a small pump, namely, the big pump is started when the unit is started, condenser vacuum is quickly established, and only the small pump is started when the unit is running, so that vacuum is maintained with smaller power consumption. The design meets the vacuum requirement of the HEI standard on quick establishment and also meets the requirements of energy conservation and consumption reduction during the operation of the unit. In addition, a preposed condensing device is additionally arranged in front of a vacuum pump group in a power plant, and the air-water mixture entering the vacuum pump is cooled in advance through cooling water, so that a part of the air-water mixture is condensed in advance, and the air quantity of the follow-up vacuum pump for pumping is further improved. However, the two designs inevitably lead to the problems of simultaneous installation of a plurality of pump sets and a plurality of tank bodies, large occupied area, scattered arrangement, repetition of partial functions and the like.
Referring to FIG. 1: in the prior art, application No.: 202020724124.5, title of the utility model: a coal-fired power plant multistage coupling condenser vacuum pumping system,
the large vacuum pump group 10 in the conventional arrangement comprises a large vacuum pump 10.1, a large vacuum pump motor 10.2, an atmospheric water separator 10.3, a large heat exchanger 10.4, a large isolation valve 10.5 and a large base frame 10.6, and the large vacuum pump group 10 in the conventional arrangement is provided with a single large preposed condensing tank 11.
Meanwhile, a small pump 12 is configured, wherein the small pump 12 comprises a small vacuum pump 12.1, a small vacuum pump motor 12.2, a small gas-water separator 12.3, a small heat exchanger 12.4, a small isolation valve 12.5 and a small base frame 12.6, and each small pump 12 is configured with a single small preposed condensing tank 13.
When a power plant selects two sets of pumps (a large vacuum pump set 10 and a small pump 12 which are arranged conventionally) for installation, the power plant occupies a large area, and meanwhile, a large preposed condensing tank 11 and a small preposed condensing tank 13, an atmospheric water separator 10.3 and a small gas-water separator 12.3, a large heat exchanger 10.4 and a small heat exchanger 12.4, and a large chassis 10.6 and a small chassis 12.6 cannot be shared, so that the waste of arrangement between two pumps with one large pump and one small pump is caused to a certain extent.
Therefore, it is urgent to develop a vacuum pump which has a structure capable of meeting three requirements of quickly establishing vacuum, maintaining vacuum with low power consumption and premixing and condensing, and has small floor space and reasonable design.
Disclosure of Invention
The utility model aims to overcome the defects of the background technology and provides a preposed coagulation double-tank double-stage vacuum pump set.
The purpose of the utility model is implemented by the following technical scheme: a preposed coagulation double-tank two-stage vacuum pump group comprises a primary vacuum pump and a secondary vacuum pump, wherein gas-water inlets arranged at the tops of the primary vacuum pump and the secondary vacuum pump are communicated with a gas-water outlet arranged at the top of a preposed coagulation tank arranged at one side through pipelines,
the exhaust ports arranged on one side of the primary vacuum pump and one side of the secondary vacuum pump are communicated with the air inlets arranged on the two sides of the gas-water separator,
the working liquid outlet arranged at the bottom of the gas-water separator is communicated with the working liquid inlet arranged at one side of the heat exchanger through a pipeline,
two pipelines are led out from a working liquid outlet on the other side of the heat exchanger and are respectively communicated with water return ports arranged on the primary vacuum pump and the secondary vacuum pump.
In the above technical scheme: and vacuum isolation valves are respectively arranged on the pipelines between the primary vacuum pump and the pre-coagulation tank and between the secondary vacuum pump and the pre-coagulation tank.
In the above technical scheme: at least one heat exchanger is arranged, and a plurality of heat exchangers can be connected in parallel or in series.
In the above technical scheme: the output end of the primary pump motor is connected with one side of the primary vacuum pump, and the output end of the secondary pump motor is connected with one side of the secondary vacuum pump.
In the above technical scheme: the central lines of the primary vacuum pump and the secondary vacuum pump are positioned on the same horizontal line.
In the above technical scheme: the preposed coagulation tank, the primary vacuum pump, the primary pump motor, the secondary vacuum pump, the secondary pump motor, the gas-water separator and the heat exchanger are all arranged on a combined underframe arranged at the bottom.
In the above technical scheme: the first-stage vacuum pump and the second-stage vacuum pump can adopt a single-stage flat disc pump, a double-stage cone pump, a roots vacuum pump or a steam ejector, and the capacity of the first-stage vacuum pump and the capacity of the second-stage vacuum pump are 20-100% of the total amount of the gas-water mixture required by the unit.
The utility model has the following advantages: 1. the two vacuum pumps share the same set of pre-coagulation tank, the gas-water separator and the heat exchanger, so that the integration degree of equipment is improved to the maximum extent, and the equipment investment cost is saved by about 30 percent compared with the conventional large and small pump settings.
2. The preposed coagulation tank, the pump set, the gas-water separator, the heat exchanger and the motor all share one combined underframe, so that the integration degree of equipment is further improved, and the occupied area is saved by about 30 percent compared with a mode that a large pump, a small pump and the preposed coagulation tank are independently arranged.
3. The capacity selection of the heat exchanger and the gas-water separator of the utility model meets the requirement of the two vacuum pumps on the simultaneous operation, when the unit normally operates and only starts the secondary vacuum pump, the allowance of the heat exchanger and the gas-water separator is far beyond the requirement of the operation of the small pump, the cooling and separating effects are better, and the air extraction efficiency is higher.
Drawings
Fig. 1 is a schematic diagram of a conventional two pump set arrangement.
Fig. 2 is a schematic view of the overall structure of the present invention.
FIG. 3 is a schematic diagram of the system of the present invention.
In the figure: the device comprises a preposed coagulation tank 1, a primary vacuum pump 2, a primary pump motor 3, a secondary vacuum pump 4, a secondary pump motor 5, a gas-water separator 6, a heat exchanger 7, a combined underframe 8, a vacuum isolation valve 9, a conventionally arranged large vacuum pump group 10, a large vacuum pump 10.1, a large vacuum pump motor 10.2, an atmospheric water separator 10.3, a large heat exchanger 10.4, a large isolation valve 10.5, a large underframe 10.6, a large preposed coagulation tank 11, a conventionally arranged small vacuum pump 12, a small vacuum pump 12.1, a small vacuum pump motor 12.2, a small gas-water separator 12.3, a small heat exchanger 12.4, a small isolation valve 12.5, a small underframe 12.6, a small preposed coagulation tank 13 and a valve 14.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but they are not to be construed as limiting the utility model, and are merely illustrative, and the advantages of the utility model will be more clearly understood and appreciated by those skilled in the art.
Referring to FIGS. 2-3: a preposed coagulation double-tank two-stage vacuum pump group comprises a primary vacuum pump 2 and a secondary vacuum pump 4, wherein air water inlets arranged at the tops of the primary vacuum pump 2 and the secondary vacuum pump 4 are communicated with an air water outlet arranged at the top of a preposed coagulation tank 1 arranged at one side through pipelines,
the exhaust ports arranged on one sides of the primary vacuum pump 2 and the secondary vacuum pump 4 are communicated with the air inlets arranged on two sides of the gas-water separator 6,
a working liquid outlet arranged at the bottom of the gas-water separator 6 is communicated with a working liquid inlet arranged at one side of the heat exchanger 7 through a pipeline,
two pipelines are led out from the working fluid outlet on the other side of the heat exchanger 7 and are respectively communicated with water return ports arranged on the primary vacuum pump 2 and the secondary vacuum pump 4.
And vacuum isolation valves 9 are respectively arranged on the pipelines between the primary vacuum pump 2 and the pre-coagulation tank 1 and between the secondary vacuum pump 4 and the pre-coagulation tank 1. The vacuum isolation valve 9 is installed so as to facilitate the starting of the unit and the switching operation between the normal operation conditions of the unit.
At least one heat exchanger 7 is arranged, and a plurality of heat exchangers 7 can be connected in parallel or in series. A plurality of heat exchangers 7 are connected in series or in parallel so as to cope with the difference of cooling water temperatures in different seasons, and the cooling capacity is controlled in a series-parallel mode.
The primary vacuum pump 2 is connected with the output end of a primary pump motor 3 arranged on one side, and the secondary vacuum pump 4 is connected with the output end of a secondary pump motor 5 arranged on one side. The central lines of the primary vacuum pump 2 and the secondary vacuum pump 4 are positioned on the same horizontal line, so that the internal liquid levels of the primary vacuum pump 2 and the secondary vacuum pump 4 are consistent when the primary vacuum pump 2 and the secondary vacuum pump 4 are started, and finally, when the primary vacuum pump 2 and the secondary vacuum pump 4 share one gas-water separator 6, the liquid levels in the whole system are kept balanced.
Leading coagulation tank 1, primary vacuum pump 2, primary pump motor 3, secondary vacuum pump 4, secondary pump motor 5, gas-water separator 6 and heat exchanger 7 all install on the joint chassis 8 that the bottom set up, joint chassis 8 of sharing has further promoted the degree of integrating of equipment, for big or small pump among the prior art and leading coagulation tank independently arrange the mode saving area about 30%.
The capacity of the gas-water separator 6 and the capacity of the heat exchanger 7 can meet the requirement of the simultaneous operation of the primary vacuum pump 2 and the secondary vacuum pump 4.
The first-stage vacuum pump 2 and the second-stage vacuum pump 4 can adopt a single-stage flat disc pump, a double-stage cone pump, a roots vacuum pump, a steam ejector or any other vacuum pumping equipment as long as the vacuum pumping effect can be achieved, and the capacity of the first-stage vacuum pump 2 and the capacity of the second-stage vacuum pump 4 are 20% -100% of the total amount of the gas-water mixture required by the unit.
The utility model comprises the following steps when in operation;
opening all valves in the system and keeping all pipelines smooth.
And secondly, simultaneously starting the primary pump motor 3 and the secondary pump motor 5, driving the primary vacuum pump 2 and the secondary vacuum pump 4 to synchronously pump air and start pumping air.
Thirdly, the gas-water mixture firstly enters the preposed coagulation tank 1 for spray cooling, one part of the gas-water mixture enters the preposed coagulation tank 1 for spray, formed liquid is remained in the preposed coagulation pipe 1 for future use, the other part of the gas-water mixture is discharged from the top of the preposed coagulation pipe 1 and then divided into two paths, one path of the gas-water mixture enters the primary vacuum pump 2 for vacuum pumping treatment, the other path of the gas-water mixture enters the secondary vacuum pump 4 for vacuum pumping treatment, and the two paths of the treated gas-water mixture enter the gas-water separator 6 for treatment;
and fourthly, after gas-liquid separation is carried out on the gas-liquid separator 6, the gas is discharged from the top of the gas-liquid separator 6 and enters the atmosphere, and the liquid goes to the heat exchanger 7 and is respectively injected back to the primary vacuum pump 2 and the secondary vacuum pump 4 after cooling and heat exchange.
And fifthly, when the starting process of the coal-fired power plant unit is finished, and when the vacuum is only needed to be maintained, the valve 14 connected with the primary vacuum pump 2 is closed, so that the operation of the secondary vacuum pump 4 is only kept.
The above-mentioned parts not described in detail are prior art.
Claims (7)
1. The utility model provides a leading two jar doublestage vacuum pump package that congeals, it includes one-level vacuum pump (2) and second grade vacuum pump (4), its characterized in that: the gas-water inlets arranged at the tops of the primary vacuum pump (2) and the secondary vacuum pump (4) are communicated with the gas-water outlet arranged at the top of the preposed coagulation tank (1) at one side through pipelines,
exhaust ports arranged on one sides of the primary vacuum pump (2) and the secondary vacuum pump (4) are communicated with air inlets arranged on two sides of the gas-water separator (6),
a working liquid outlet arranged at the bottom of the gas-water separator (6) is communicated with a working liquid inlet arranged at one side of the heat exchanger (7) through a pipeline,
two pipelines are led out from a working liquid outlet on the other side of the heat exchanger (7), and are respectively communicated with water return ports arranged on the primary vacuum pump (2) and the secondary vacuum pump (4).
2. The pre-coagulation double-tank double-stage vacuum pump group as claimed in claim 1, wherein: and vacuum isolation valves (9) are respectively arranged on pipelines between the primary vacuum pump (2) and the secondary vacuum pump (4) and the preposed coagulation tank (1).
3. The pre-coagulation double-tank double-stage vacuum pump group as claimed in claim 1 or 2, wherein: at least one heat exchanger (7) is arranged, and a plurality of heat exchangers (7) can be connected in parallel or in series.
4. The pre-coagulation double-tank double-stage vacuum pump group as claimed in claim 3, wherein: the vacuum pump is characterized in that the primary vacuum pump (2) is connected with the output end of a primary pump motor (3) arranged on one side, and the secondary vacuum pump (4) is connected with the output end of a secondary pump motor (5) arranged on one side.
5. The pre-coagulation double-tank double-stage vacuum pump group as claimed in claim 4, wherein: the central lines of the primary vacuum pump (2) and the secondary vacuum pump (4) are positioned on the same horizontal line.
6. The pre-coagulation double-tank double-stage vacuum pump group as claimed in claim 4 or 5, wherein: the device is characterized in that the preposed coagulation tank (1), the primary vacuum pump (2), the primary pump motor (3), the secondary vacuum pump (4), the secondary pump motor (5), the gas-water separator (6) and the heat exchanger (7) are all installed on a combined chassis (8) arranged at the bottom.
7. The pre-coagulation double-tank double-stage vacuum pump group as claimed in claim 6, wherein: the primary vacuum pump (2) and the secondary vacuum pump (4) can adopt a single-stage flat disc pump, a double-stage cone pump, a roots vacuum pump or a steam ejector, and the capacity of the primary vacuum pump (2) and the secondary vacuum pump (4) is 20-100% of the total amount of the gas-water mixture required by the unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121705138.3U CN216044255U (en) | 2021-07-26 | 2021-07-26 | Front-mounted coagulation double-tank two-stage vacuum pump set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121705138.3U CN216044255U (en) | 2021-07-26 | 2021-07-26 | Front-mounted coagulation double-tank two-stage vacuum pump set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216044255U true CN216044255U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121705138.3U Active CN216044255U (en) | 2021-07-26 | 2021-07-26 | Front-mounted coagulation double-tank two-stage vacuum pump set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216044255U (en) |
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2021
- 2021-07-26 CN CN202121705138.3U patent/CN216044255U/en active Active
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