CN113294339A - Automatic water replenishing system of water-ring vacuum pump for thermal power plant - Google Patents
Automatic water replenishing system of water-ring vacuum pump for thermal power plant Download PDFInfo
- Publication number
- CN113294339A CN113294339A CN202110771402.1A CN202110771402A CN113294339A CN 113294339 A CN113294339 A CN 113294339A CN 202110771402 A CN202110771402 A CN 202110771402A CN 113294339 A CN113294339 A CN 113294339A
- Authority
- CN
- China
- Prior art keywords
- vacuum pump
- water
- water tank
- ring vacuum
- thermal power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- F04C19/001—General arrangements, plants, flowsheets
-
- 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
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/005—Details concerning the admission or discharge
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
-
- 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
Abstract
The embodiment of the invention discloses an automatic water replenishing system of a water ring vacuum pump for a thermal power plant, which comprises: the water-ring vacuum pump is connected with the water tank of the vacuum pump separator through a manual valve and a pneumatic valve; the vacuum pump cooler is connected with the vacuum pump separator water tank and the water ring vacuum pump; the vacuum pump separator water tank is connected with the small sealed water tank, a ball float valve is arranged inside the small sealed water tank, and the small sealed water tank is connected to the input port of the condenser through a manual valve and a drainage electromagnetic valve. By adopting the invention, the temperature criterion of the vacuum pump is introduced, the vacuum pressure is ensured, and meanwhile, the working solution can be recycled, and the operation cost is reduced.
Description
Technical Field
The invention relates to the field of water ring vacuum pumps, in particular to an automatic water replenishing system of a water ring vacuum pump for a thermal power plant.
Background
In a thermal power plant, in order to maintain the vacuum of a condenser, it is necessary to pump out noncondensable gas in the condenser using a vacuum pump. The water-ring vacuum pump is a vacuum pump commonly used in a thermal power plant, and the working principle is as follows: by means of the rotation of the eccentric impeller, the working liquid inside the pump body forms water ring under the action of centrifugal force and forms several small cavities with periodically changed volume together with the blades on the impeller, so as to realize continuous air suction, compression and exhaust.
The actual output of the water-ring vacuum pump is highly related to the water level and the temperature of the working fluid, and the temperature of the working fluid rises continuously due to the fact that the vacuum pump can generate a large amount of heat under long-term work, and the generated hot steam can influence the normal operation of the vacuum pump. Meanwhile, the existing equipment generally discharges the working solution in a direct overflow manner, so that a large amount of water resource waste is caused, and the operation cost is increased.
In order to ensure that the water-ring vacuum pump operates under the safe and economic working condition, the invention designs the automatic water replenishing system of the water-ring vacuum pump for the thermal power plant, which not only can ensure that the working fluid of the vacuum pump is sufficient in quantity and proper in temperature, but also can recycle the working fluid, thereby greatly reducing the operation cost.
Disclosure of Invention
In order to solve the above technical problem, an embodiment of the present invention provides an automatic water replenishing system for a water-ring vacuum pump of a thermal power plant, including: the system comprises a water ring vacuum pump, a vacuum pump separator water tank, a vacuum pump cooler, a small machine sealed water tank, a condenser and relevant valves.
The output port of the condenser is connected with the water ring vacuum pump through a manual valve and a pneumatic valve, and the water ring vacuum pump is connected with the water tank of the vacuum pump separator; the vacuum pump cooler is connected with the vacuum pump separator water tank and the water ring vacuum pump; the vacuum pump separator water tank is connected with the small sealed water tank, a ball float valve is arranged inside the small sealed water tank, and the small sealed water tank is connected to the input port of the condenser through a manual valve and a drainage electromagnetic valve.
The water ring vacuum pump is characterized in that a water replenishing pipeline is arranged at an inlet of the water ring vacuum pump and comprises a water replenishing pump, and a manual valve and a water replenishing electromagnetic valve which are connected with the water replenishing pump.
And a first temperature sensor for monitoring the water replenishing temperature is arranged at the inlet of the water replenishing pipeline.
Wherein, be equipped with level sensor in the vacuum pump separator water tank.
A cooling water inlet pipeline of the vacuum pump cooler is provided with a second temperature sensor; and a working liquid outlet pipeline of the vacuum pump cooler is provided with a third temperature sensor.
The output port of the vacuum pump separator water tank is also connected with an overflow pipeline, an observation hole is arranged on the overflow pipeline, and the overflow pipeline is connected to the trench through a manual valve.
Wherein the vacuum pump separator water tank and the small machine sealed water tank are provided with on-site water level meters.
The embodiment of the invention has the following beneficial effects: a plurality of temperature parameters are introduced into the system control to control the working temperature of the vacuum pump, so that the vacuum pumping capacity of the vacuum pump is ensured; the system forms water circulation, and in actual work, most working solution can all circulate back to the condenser again, has reduced the waste of water resource, has reduced the running cost.
Drawings
FIG. 1 is a schematic diagram of the system connections of the present invention;
fig. 2 is a control block diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, an automatic water replenishing system for a water-ring vacuum pump of a thermal power plant includes: the system comprises a water ring vacuum pump 1, a vacuum pump separator water tank 2, a vacuum pump cooler 3, a small machine sealed water tank 4, a condenser 5 and related valves.
The output port of the condenser 5 is connected with the water ring vacuum pump 1 through a manual valve and a pneumatic valve, and the water ring vacuum pump 1 is connected with the vacuum pump separator water tank 2; the vacuum pump cooler 3 is connected with the vacuum pump separator water tank 2, and the vacuum pump cooler 3 is connected with the water ring vacuum pump 1; the vacuum pump separator water tank 2 is connected with the small sealed water tank 4, a ball float valve is arranged inside the small sealed water tank 4, and the small sealed water tank 4 is connected to an input port of the condenser 5 through a manual valve and a drainage electromagnetic valve 61.
And a water replenishing pipeline is arranged on an inlet pipeline of the water ring vacuum pump 1 and comprises a water replenishing pump 7, and a manual valve and a water replenishing electromagnetic valve 62 which are connected with the water replenishing pump.
The output port of the vacuum pump separator water tank 2 is also connected with an overflow pipeline, an observation hole is arranged on the overflow pipeline, and the overflow pipeline is connected to a trench through a manual valve.
Setting of a temperature sensor and a liquid level sensor:
referring to fig. 1, in the present embodiment, a total of 3 temperature sensors are provided, which specifically include: a first temperature sensor 81 for monitoring the water replenishing temperature is arranged at the inlet of the water replenishing pipeline of the vacuum pump and is used for monitoring the water replenishing temperature T1 of the desalted water; a cooling water inlet pipeline of the vacuum pump cooler is provided with a second temperature sensor 82 for monitoring the inlet water temperature T2 of the cooling water; and a third temperature sensor 83 is arranged on a working fluid outlet pipeline of the vacuum pump cooler and used for monitoring the temperature T3 of the working fluid.
And a liquid level sensor is arranged in the water tank of the vacuum pump separator to monitor the water level in the water tank.
The first temperature sensor 81, the second temperature sensor 82, the third temperature sensor 83 and the liquid level sensor collect temperature information and liquid level information of respective points and output the temperature information and the liquid level information to a DCS (distributed control system), and the DCS (distributed control system) controls the water replenishing electromagnetic valve 62 and the water draining electromagnetic valve 61.
As shown in fig. 2, a control method of an automatic water replenishing system of a water-ring vacuum pump for a thermal power plant specifically includes:
when the temperature T3 of the working fluid collected by the third temperature sensor 83 is greater than the cooling water inlet temperature T2 of the second temperature sensor 82 plus the set temperature T4, the DCS (distributed control system) issues an alarm. Meanwhile, if the demineralized water replenishing temperature T1 is less than T3, the DCS (distributed control system) controls the water replenishing electromagnetic valve 62 to be automatically opened to replenish water to the inlet pipeline of the water ring vacuum pump so as to ensure that the temperature of the working liquid in the pump body is not too high. In this embodiment, the set temperature T4 is 5 ℃ in consideration of the end difference of the cooler and the operation requirement of the equipment.
When the water level of the water tank 2 of the vacuum pump separator is smaller than the low I value, the low liquid level switch acts, the water replenishing electromagnetic valve 62 is automatically opened to replenish water to the inlet pipeline of the water ring vacuum pump 1, so that sufficient working liquid in the pump body is ensured; when the water level is less than the low II value, a DCS (distributed control system) sends an alarm that the water level of the water tank 2 of the vacuum pump separator is too low; when the water level is higher than the high I value, the high liquid level switch is operated, and meanwhile, if the T3 is less than or equal to T2 and is added with T4, or the T1 is greater than or equal to T3, the water replenishing electromagnetic valve 62 is automatically closed after being delayed for 30 s; and when the water level is higher than the high II value, the water tank of the vacuum pump separator discharges the overflow of the working fluid through an overflow pipeline. In this embodiment, the water level of the water tank is set to have a low value i of 200mm, a low value ii of 150mm, a high value i of 300mm, and a high value ii of 350 mm.
When the water level of the small sealed water tank 4 is higher than the low value, the ball float valve is jacked up, the drainage electromagnetic valve 61 is opened automatically, and water in the small sealed water tank 4 is drained to the condenser 5. When the water level is less than the low value, the float valve is closed, and meanwhile, the drainage electromagnetic valve 61 is automatically closed, so that the vacuum of the condenser 5 is prevented from being influenced. When the water level is higher than the high value, the water in the small sealed water tank 4 overflows to the trench. In this embodiment, the water level of the water tank is set to 500mm at the low value and 1200mm at the high value.
Preferably, the vacuum pump separator water tank 2 and the small sealed water tank 4 are equipped with on-site level gauges in order to facilitate the patrolman's patrol.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (7)
1. The utility model provides a water ring vacuum pump automatic water charging system for thermal power factory which characterized in that includes: the system comprises a water ring vacuum pump (1), a vacuum pump separator water tank (2), a vacuum pump cooler (3), a small machine sealing water tank (4), a condenser (5) and related valves; the output port of the condenser (5) is connected with the water ring vacuum pump (1) through a manual valve and a pneumatic valve, and the water ring vacuum pump (1) is connected with the vacuum pump separator water tank (2); the vacuum pump cooler (3) is connected with the vacuum pump separator water tank (2), and the vacuum pump cooler (3) is connected with the water ring vacuum pump (1); the vacuum pump separator water tank (2) is connected with the small sealed water tank (4), a ball float valve is arranged inside the small sealed water tank (4), and the small sealed water tank (4) is connected to the input port of the condenser (5) through a manual valve and a drainage electromagnetic valve (61).
2. The automatic water replenishing system of the water-ring vacuum pump for the thermal power plant according to claim 1, characterized in that a water replenishing pipeline is arranged on an inlet pipeline of the water-ring vacuum pump (1), and the water replenishing pipeline comprises a water replenishing pump (7) and a manual valve and a water replenishing electromagnetic valve (62) which are connected with the water replenishing pump.
3. The automatic water replenishing system of the water ring vacuum pump for the thermal power plant according to claim 2, wherein a first temperature sensor (81) for monitoring the temperature of the replenished water is arranged at the inlet of the replenished water pipeline.
4. The automatic water replenishing system of the water-ring vacuum pump for the thermal power plant as claimed in claim 1, characterized in that a liquid level sensor is arranged in the vacuum pump separator water tank (2).
5. The automatic water replenishing system for the water-ring vacuum pump of the thermal power plant as recited in claim 1, wherein a cooling water inlet pipe of the vacuum pump cooler is provided with a second temperature sensor (82); and a third temperature sensor (83) is arranged at the position of a working liquid outlet pipeline of the vacuum pump cooler.
6. The automatic water replenishing system for the water-ring vacuum pump of the thermal power plant as claimed in claim 1, wherein the output port of the vacuum pump separator water tank (2) is further connected with an overflow pipeline, the overflow pipeline is provided with a viewing hole, and the overflow pipeline is connected to a trench through a manual valve.
7. The automatic water replenishing system for the water ring vacuum pump of the thermal power plant as claimed in claim 1, wherein the vacuum pump separator water tank (2) and the small sealed water tank (4) are equipped with on-site water level gauges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110771402.1A CN113294339A (en) | 2021-07-07 | 2021-07-07 | Automatic water replenishing system of water-ring vacuum pump for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110771402.1A CN113294339A (en) | 2021-07-07 | 2021-07-07 | Automatic water replenishing system of water-ring vacuum pump for thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113294339A true CN113294339A (en) | 2021-08-24 |
Family
ID=77330643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110771402.1A Pending CN113294339A (en) | 2021-07-07 | 2021-07-07 | Automatic water replenishing system of water-ring vacuum pump for thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113294339A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001029A (en) * | 2021-10-29 | 2022-02-01 | 西安热工研究院有限公司 | Method for obtaining maximum working liquid temperature of water ring vacuum pump |
-
2021
- 2021-07-07 CN CN202110771402.1A patent/CN113294339A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001029A (en) * | 2021-10-29 | 2022-02-01 | 西安热工研究院有限公司 | Method for obtaining maximum working liquid temperature of water ring vacuum pump |
| CN114001029B (en) * | 2021-10-29 | 2022-11-01 | 西安热工研究院有限公司 | Method for obtaining maximum working liquid temperature of water ring vacuum pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113294339A (en) | Automatic water replenishing system of water-ring vacuum pump for thermal power plant | |
| CN217233798U (en) | Automatic water replenishing system of water-ring vacuum pump for thermal power plant | |
| CN214247439U (en) | Novel on-spot exhaust steam of condensing steam turbine unit is hydrophobic to be synthesized and is retrieved device | |
| CN204921133U (en) | Take expansion tank of baffle | |
| WO2013157989A1 (en) | System of leakage drains for a main circulating pump assembly | |
| CN107165854B (en) | Automatic control and recovery device for sealing water of water supply pump | |
| CN207317561U (en) | One kind is used for the simple way of escape vacuum extractor of unclean steam-electric power | |
| CN211174238U (en) | Drainage system for lower steam exhaust pipeline of low-position arranged water feeding pump steam turbine | |
| CN203784920U (en) | Water level regulation device of sealing water multilevel water seal of water feed pump | |
| CN209558935U (en) | A kind of small turbine condensing plant | |
| CN210568339U (en) | Boiler fixed-row drainage system | |
| CN211739930U (en) | Novel water distribution adjusting device for cooling tower of thermal power plant | |
| CN220816079U (en) | Drainage and discharge system of gas turbine | |
| CN215633487U (en) | Water supply anti-freezing purging system for hydroelectric generating set technology | |
| CN219550501U (en) | Drainage exhaust steam recovery system | |
| CN212746921U (en) | Heating circulating device | |
| CN218160469U (en) | Antifreeze fluid recovery device for fuel cell engine system test board | |
| CN218378311U (en) | Exhaust equipment and open system | |
| CN103644002B (en) | The steam-extracting cooling system of a kind of sugar refinery turbine steam seal | |
| CN203584481U (en) | Steam sucking and cooling system for turbine steam seal for sugar factory | |
| CN209837168U (en) | Automatic control water replenishing and draining device | |
| CN117399375B (en) | Cold plate cleaning equipment and cold plate pipeline circulation cleaning system thereof | |
| CN214403688U (en) | Condenser cooling system | |
| CN218439697U (en) | Negative pressure vacuum station for production of lead-acid batteries | |
| CN215409208U (en) | Water ring vacuum unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |