CN110715561A - Water ring vacuum pump system based on front condensation type steam-gas separation device - Google Patents
Water ring vacuum pump system based on front condensation type steam-gas separation device Download PDFInfo
- Publication number
- CN110715561A CN110715561A CN201911114835.9A CN201911114835A CN110715561A CN 110715561 A CN110715561 A CN 110715561A CN 201911114835 A CN201911114835 A CN 201911114835A CN 110715561 A CN110715561 A CN 110715561A
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- Prior art keywords
- water
- vacuum pump
- steam
- separation device
- gas separation
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Classifications
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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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
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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
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
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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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
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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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a water ring vacuum pump system based on a front condensation type steam-gas separation device, which comprises the front condensation type steam-gas separation device, a plane disc type water ring vacuum pump, a steam-water separator and a vacuum pump cooler, wherein the front condensation type steam-gas separation device is connected with the water ring vacuum pump; the system can effectively solve the problems that a wall unit runs under high back pressure and is easy to have low capacity of pumping dry air, impeller cracks, cavitation and overlarge overflow quantity of the steam-water separator.
Description
Technical Field
The invention belongs to the field of vacuum acquisition equipment of thermal power generating units, and relates to a water ring vacuum pump system based on a front-mounted condensing type steam-gas separation device.
Background
The water-ring vacuum pump has the advantages of high vacuum degree, low noise, energy conservation, simple structure, convenient maintenance and the like, and is widely applied to air extraction equipment of a high-capacity thermal power unit condensing system. Most of them are flat disc type.
In actual operation, the flat disc type water ring vacuum pump mainly has the following problems:
1. the steam-gas mixture is partially condensed by the traditional condensing nozzle, so that the limited air inlet space of the disc type vacuum pump is reduced, the air pumping capacity of the vacuum pump is reduced, and the high back pressure of the unit is particularly obvious.
2. Moisture and condensed water carried in the steam-gas mixture enter the vacuum pump, which may cause water hammer of the impeller and may even cause extreme situations of cracks or fractures of the impeller, and the existence of the condensing nozzle aggravates the phenomenon, and is particularly obvious when the back pressure of the unit is high.
3. When the unit is in high back pressure, the steam content in the steam-gas mixture at the suction inlet of the vacuum pump is obviously increased, and a large amount of hot steam enters the vacuum pump to quickly raise the temperature of working fluid in the pump, so that the suction capacity of the vacuum pump is obviously reduced, and the cavitation risk of the vacuum pump is increased.
4. When the unit is in high back pressure, a large amount of water from the steam-water separator directly overflows to a trench (condensed water is not recovered), and the loss of the condensed water is serious.
The traditional vacuum pump working solution cooling scheme (such as a cooling water added refrigerating device scheme, a working solution added refrigerating device scheme, a water supplementing added refrigerating device scheme and the like) only focuses on treatment after the temperature of the working solution rises, does not essentially prevent and treat the temperature rise of the working solution, and has the key that one of the problems caused by excessive moisture carried in a vapor-gas mixture at a suction port of a vacuum pump cannot be effectively solved.
The factors such as economy and safety are comprehensively considered, the problems that the traditional plane disc type water ring vacuum pump is low in air pumping capacity, impeller cracks, cavitation, overlarge in overflow amount of a steam-water separator and the like easily occur when the traditional plane disc type water ring vacuum pump operates under high back pressure of a unit are solved, and the problems cannot be completely and effectively solved by means of a method of simply reducing the temperature of working liquid and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a water ring vacuum pump system based on a front condensation type steam-gas separation device, which can effectively solve the problems that a wall unit is easy to have low capacity of pumping dry air, impeller cracks, cavitation and overlarge overflow quantity of a steam-water separator when operating under high back pressure.
In order to achieve the aim, the water ring vacuum pump system based on the front condensation type steam-gas separation device comprises the front condensation type steam-gas separation device, a plane disc type water ring vacuum pump, a steam-water separator and a vacuum pump cooler;
the gas side outlet of the preposed condensing type gas-gas separator is communicated with the gas side inlet of the plane disc type water ring vacuum pump, the outlet of the plane disc type water ring vacuum pump is communicated with the inlet of the steam-water separator, the water outlet of the steam-water separator and the water outlet of the preposed condensing type gas-gas separation device are communicated with the heat release side inlet of the vacuum pump cooler, and the heat release side outlet of the vacuum pump cooler is communicated with the working fluid inlet of the plane disc type water ring vacuum pump.
The water outlet of the front condensing type steam-gas separation device is communicated with the heat release side inlet of the vacuum pump cooler through a condensed water outlet check valve.
The front condensing type steam-gas separation device is internally provided with a folded plate type cooler.
Still include refrigerated water inlet pipe, cooling water inlet pipe, refrigerated water return water pipeline and cooling water return water pipe, wherein, refrigerated water inlet pipe and cooling water inlet pipe all are linked together with vacuum pump cooler's heat absorption side entry and folded plate cooler's entry, and refrigerated water return water pipeline and cooling water return water pipeline all are linked together with vacuum pump cooler's heat absorption side export and folded plate cooler's export.
The vacuum pump cooler is characterized by further comprising a water replenishing pipeline, wherein the water replenishing pipeline is communicated with a heat release side inlet of the vacuum pump cooler. The water replenishing pipeline is provided with a water replenishing valve.
The system also comprises a steam-water separator overflow water recovery pipeline, wherein the recovery pipeline is communicated with a water outlet pipeline of the preposed condensing steam-gas separator, and a water drain valve is arranged behind the mixing point.
The invention has the following beneficial effects:
when the water ring vacuum pump system based on the front condensation type steam-gas separation device is specifically operated, the front condensation type steam-gas separation device is additionally arranged at the inlet of the plane disc type water ring vacuum pump, steam-gas mixtures at the inlet of the plane disc type water ring vacuum pump are fully cooled, so that the temperature of the steam-gas mixtures is obviously reduced, the steam-gas mixtures are separated before the pump, the total volume flow of the mixtures entering the plane disc type water ring vacuum pump is reduced, the temperature of working fluid returning to the plane disc type water ring vacuum pump is reduced, the air pumping capacity of the plane disc type water ring vacuum pump is improved, the water attack possibility of the plane disc type water ring vacuum pump is reduced, and the problem of impeller cracks is effectively avoided. In addition, along with the reduction of the temperature of the working fluid of the plane disc type water ring vacuum pump, the water content in the non-condensable gas is greatly reduced, so that the anti-cavitation capacity of the plane disc type water ring vacuum pump is obviously improved.
Drawings
FIG. 1 is a schematic structural diagram of a conventional plane disc type water ring vacuum pump 2 system
Fig. 2 is a schematic structural diagram of the present invention.
Wherein, 1 is a front-mounted condensing type steam-gas separation device, 2 is a plane disc type water ring vacuum pump, 3 is a steam-water separator, 4 is a vacuum pump cooler, 5 is a condensed water outlet check valve, and 6 is an S-shaped trap.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 2, the water-ring vacuum pump system based on the pre-condensing steam-gas separation device of the present invention includes a pre-condensing steam-gas separation device 1, a disc-type water-ring vacuum pump 2, a steam-water separator 3, and a vacuum pump cooler 4; the gas side outlet of the pre-condensation type steam-gas separation device 1 is communicated with the gas side inlet of the plane disc type water ring vacuum pump 2, the outlet of the plane disc type water ring vacuum pump 2 is communicated with the inlet of the steam-water separator 3, the water outlet of the steam-water separator 3 and the water outlet of the pre-condensation type steam-gas separation device 1 are communicated with the heat release side inlet of the vacuum pump cooler 4, and the heat release side outlet of the vacuum pump cooler 4 is communicated with the working liquid inlet of the plane disc type water ring vacuum pump 2.
The water outlet of the front condensing type steam-gas separation device 1 is communicated with the heat release side inlet of a vacuum pump cooler 4 through a check valve 5; a folded plate type cooler is arranged in the front condensing type steam-gas separation device 1. The invention also comprises a chilled water inlet pipeline, a cooling water inlet pipeline, a chilled water return pipeline and a cooling water return pipeline, wherein the chilled water inlet pipeline and the cooling water inlet pipeline are communicated with the heat absorption side inlet of the vacuum pump cooler 4 and the inlet of the folded plate type cooler, and the chilled water return pipeline and the cooling water return pipeline are communicated with the heat absorption side outlet of the vacuum pump cooler 4 and the outlet of the folded plate type cooler.
The invention also comprises a water replenishing pipeline, wherein the water replenishing pipeline is communicated with a heat release side inlet of the vacuum pump cooler 4; the water replenishing pipeline is provided with a water replenishing valve.
The invention also comprises a steam-water separator overflow water recovery pipeline, wherein the recovery pipeline is communicated with a water outlet pipeline of the preposed condensing steam-gas separator 1; a water drain valve is arranged behind the mixing point.
The specific working process of the invention is as follows:
the water vapor-noncondensable gas mixture from the vacuumizing area of the condenser enters a preposed condensing type vapor-gas separation device 1 for condensation and separation, wherein, the non-condensable gas after cooling separation enters a plane disc type water ring vacuum pump 2, and then is discharged into a steam-water separator 3 by the plane disc type water ring vacuum pump 2 to carry out steam-water separation, wherein, the gas separated by the steam-water separator 3 is discharged into the atmosphere, the water separated by the steam-water separator 3, the water separated by the pre-condensing steam-gas separator 11 and the make-up water output by the make-up water pipeline enter the vacuum pump cooler 4 together for cooling, the cooled water enters the plane disc type water ring vacuum pump 2 for maintaining the water ring of the plane disc type water ring vacuum pump 2 and reducing the temperature of the water ring, wherein, the source of the cooling water in the vacuum pump cooler 4 has two paths, wherein one path is taken from the condenser cooling water; the other path is taken from the chilled water of the air conditioning unit or other cold water (such as deep well water and the like).
Claims (8)
1. A water ring vacuum pump system based on a front condensation type steam-gas separation device is characterized by comprising the front condensation type steam-gas separation device (1), a plane disc type water ring vacuum pump (2), a steam-water separator (3) and a vacuum pump cooler (4);
an air side outlet of the front condensation type steam-gas separation device (1) is communicated with an air side port of the plane disc type water ring vacuum pump (2), an outlet of the plane disc type water ring vacuum pump (2) is communicated with an inlet of the steam-water separator (3), a water outlet of the steam-water separator (3) and a water outlet of the front condensation type steam-gas separation device (1) are communicated with a heat release side inlet of the vacuum pump cooler (4), and a heat release side outlet of the vacuum pump cooler (4) is communicated with a working liquid inlet of the plane disc type water ring vacuum pump (2).
2. The water ring vacuum pump system based on the pre-condensing type steam-gas separation device according to claim 1, characterized in that the water outlet of the pre-condensing type steam-gas separation device (1) is communicated with the heat release side inlet of the vacuum pump cooler (4) through a condensed water outlet check valve (5).
3. The water ring vacuum pump system based on the pre-condensing steam-gas separation device according to claim 1, characterized in that a folded plate cooler is arranged in the pre-condensing steam-gas separation device (1).
4. The water ring vacuum pump system based on the pre-condensing type steam-gas separation device according to claim 3, further comprising a chilled water inlet pipe, a cooling water inlet pipe, a chilled water return pipe and a cooling water return pipe, wherein the chilled water inlet pipe and the cooling water inlet pipe are both communicated with the heat absorption side inlet of the vacuum pump cooler (4) and the inlet of the folded plate cooler, and the chilled water return pipe and the cooling water return pipe are both communicated with the heat absorption side outlet of the vacuum pump cooler (4) and the outlet of the folded plate cooler.
5. The water ring vacuum pump system based on the pre-condensing steam-gas separation device as claimed in claim 1, further comprising a water replenishing pipeline, wherein the water replenishing pipeline is communicated with the heat release side inlet of the vacuum pump cooler (4).
6. The water ring vacuum pump system based on the front condensation type steam-gas separation device as claimed in claim 5, wherein a water replenishing valve is arranged on a water replenishing pipeline.
7. The water ring vacuum pump system based on the pre-condensing vapor-gas separation device is characterized by further comprising an overflow water recovery pipeline, wherein the recovery pipeline is communicated with the water outlet pipeline of the pre-condensing vapor-gas separator (1).
8. The water ring vacuum pump system based on the pre-condensing steam-gas separation device as claimed in claim 7, wherein the overflow water recovery pipe is provided with a water drain valve after the mixing point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114835.9A CN110715561A (en) | 2019-11-14 | 2019-11-14 | Water ring vacuum pump system based on front condensation type steam-gas separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114835.9A CN110715561A (en) | 2019-11-14 | 2019-11-14 | Water ring vacuum pump system based on front condensation type steam-gas separation device |
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| Publication Number | Publication Date |
|---|---|
| CN110715561A true CN110715561A (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911114835.9A Pending CN110715561A (en) | 2019-11-14 | 2019-11-14 | Water ring vacuum pump system based on front condensation type steam-gas separation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828321A (en) * | 2020-06-16 | 2020-10-27 | 华电电力科学研究院有限公司 | Working liquid cooling method for effectively improving working efficiency of vacuum pump |
| CN111998694A (en) * | 2020-08-17 | 2020-11-27 | 中国电力工程顾问集团中南电力设计院有限公司 | Forced-ventilated type preposed coagulation vacuumizing method |
| CN111998693A (en) * | 2020-08-17 | 2020-11-27 | 中国电力工程顾问集团中南电力设计院有限公司 | Self-flow type preposed coagulation vacuumizing method |
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| CN104949541A (en) * | 2015-06-29 | 2015-09-30 | 深圳市成德机械有限公司 | Device and method for improving vacuum of power plant condenser and thermal power generation system |
| CN207247937U (en) * | 2017-09-07 | 2018-04-17 | 中国能源建设集团山西省电力勘测设计院有限公司 | The Direct Air-Cooled pumped vacuum systems of damp steam water capacity can be reduced |
| CN108757471A (en) * | 2018-05-02 | 2018-11-06 | 中国华电科工集团有限公司 | Water-ring vacuum pump fluid cooling water system |
| CN208872138U (en) * | 2018-08-06 | 2019-05-17 | 山东电力工程咨询院有限公司 | A kind of condenser vacuum evacuation device |
| CN211651275U (en) * | 2019-11-14 | 2020-10-09 | 西安热工研究院有限公司 | Leading condensing type vapour-gas separation equipment suitable for plane disc type water ring vacuum pump |
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2019
- 2019-11-14 CN CN201911114835.9A patent/CN110715561A/en active Pending
Patent Citations (6)
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| CN203239641U (en) * | 2013-05-09 | 2013-10-16 | 大唐苏州热电有限责任公司 | Vacuum pumping system adopting two lines of cooling water for vacuum pump cooler |
| CN104949541A (en) * | 2015-06-29 | 2015-09-30 | 深圳市成德机械有限公司 | Device and method for improving vacuum of power plant condenser and thermal power generation system |
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| CN211651275U (en) * | 2019-11-14 | 2020-10-09 | 西安热工研究院有限公司 | Leading condensing type vapour-gas separation equipment suitable for plane disc type water ring vacuum pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828321A (en) * | 2020-06-16 | 2020-10-27 | 华电电力科学研究院有限公司 | Working liquid cooling method for effectively improving working efficiency of vacuum pump |
| CN111998694A (en) * | 2020-08-17 | 2020-11-27 | 中国电力工程顾问集团中南电力设计院有限公司 | Forced-ventilated type preposed coagulation vacuumizing method |
| CN111998693A (en) * | 2020-08-17 | 2020-11-27 | 中国电力工程顾问集团中南电力设计院有限公司 | Self-flow type preposed coagulation vacuumizing method |
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