CN215832561U - Automatic backwashing system for water ring vacuum pump heat exchanger - Google Patents
Automatic backwashing system for water ring vacuum pump heat exchanger Download PDFInfo
- Publication number
- CN215832561U CN215832561U CN202122448331.XU CN202122448331U CN215832561U CN 215832561 U CN215832561 U CN 215832561U CN 202122448331 U CN202122448331 U CN 202122448331U CN 215832561 U CN215832561 U CN 215832561U
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- water
- vacuum pump
- heat exchanger
- ring vacuum
- water outlet
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- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 238000011001 backwashing Methods 0.000 title claims abstract description 51
- 230000007306 turnover Effects 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 description 11
- 238000011010 flushing procedure Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012224 working solution Substances 0.000 description 2
- 206010019345 Heat stroke Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
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Abstract
The utility model provides an automatic backwashing system for a water ring vacuum pump heat exchanger, wherein a water inlet pipe and a water outlet pipe of a water outlet pipeline of the water ring vacuum pump are connected with the heat exchanger, a circulating pump is connected on the water outlet pipe of the water outlet pipeline, the heat exchanger comprises a heat exchange water inlet pipe, a heat exchange water outlet pipe and a backwashing water inlet pipe, the automatic backwashing system comprises a PLC (programmable logic controller) control cabinet, a first temperature sensor and electric valves, the four electric valves are respectively arranged on the heat exchange water inlet pipe, the backwashing water inlet pipe and the backwashing water outlet pipe, the first temperature sensor is connected to a water inlet pipe of the water outlet pipeline of the water ring vacuum pump, and the electric valves and the first temperature sensor are both connected with the PLC control cabinet. The automatic backwashing system reduces the labor intensity of workers, avoids manual misoperation, improves the running economy of a unit, and is simple in structure and low in equipment cost.
Description
Technical Field
The utility model relates to the technical field of thermal power generating sets, in particular to an automatic backwashing system for a water ring vacuum pump heat exchanger.
Background
When the thermal power generating set works, a plurality of water ring vacuum pumps are required to be simultaneously configured to pump out non-condensable gas in condensers in the set, and the vacuum state of the set is maintained, so that the set is operated safely and economically. When the water ring vacuum pump operates, the cooling water temperature of the vacuum pump rises, so that the air extraction capacity and the efficiency of the water ring vacuum pump are reduced, and the unit is unsafe and uneconomical to operate. Therefore, heat exchange needs to be carried out on cooling water of the water ring vacuum pump, and the current heat exchange means mainly carries out heat exchange through a plate type heat exchanger. The cooling water source of the water ring vacuum pump heat exchanger generally adopts open circulating water sources such as rivers, lakes and seas, the water quality of the water sources is poor, microorganisms are more, the problems of dirt blockage and the like of the water ring vacuum pump heat exchanger are easy to occur, so that the heat exchange effect is poor, particularly, the water temperature in summer is high, the influence on the heat exchange effect is larger, the temperature of working liquid of the vacuum pump is not provided with a remote transmission point, and workers easily ignore the condition that the efficiency of the water ring vacuum pump is reduced due to the poor heat exchange effect.
In order to eliminate the problem of dirt blockage on the heat exchanger, the heat exchanger can be periodically backwashed, and residual dirt on the heat exchanger is washed away by the reverse flow of a cooling water source. At present, manual backwashing is mostly adopted for a heat exchanger, but the following problems exist in manual operation: (1) the backwashing steps are more, errors are easy to occur, and the safety of the unit is influenced; (2) the back washing time is not easy to control manually, if the heat exchange effect is influenced by too long time, the back washing is not thorough due to too short time; (3) the valve is large, the switching is laborious, the workload is large, and operators are easy to heatstroke in summer; (4) because the working liquid temperature of the water ring vacuum pump has no remote measuring point, the environmental temperature and the water temperature are influenced by weather, the water quality of a cooling water source is poor and other uncertain factors, a worker can only check whether the working liquid temperature of the vacuum pump is normal through regular inspection, and the vacuum pump is easy to operate abnormally.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model provides an automatic backwashing system for a water ring vacuum pump heat exchanger, which reduces the labor intensity of workers, avoids manual misoperation, improves the running economy of a unit, and has the advantages of simple structure and lower equipment cost.
The technical scheme adopted by the utility model for solving the technical problem is as follows:
the utility model provides an automatic back flush system for water ring vacuum pump heat exchanger, the outlet conduit's of water ring vacuum pump business turn over water pipe is connected with the heat exchanger, is connected with the circulating pump on outlet conduit's the outlet pipe, and the heat exchanger includes heat transfer business turn over water pipe and back flush business turn over water pipe, automatic back flush system includes PLC switch board, first temperature sensor and electric valve, and wherein electric valve is provided with four and installs respectively on heat transfer business turn over water pipe and back flush business turn over water pipe, and first temperature sensor connects on the inlet tube of outlet conduit of water ring vacuum pump, and electric valve and first temperature sensor all are connected with the PLC switch board.
And a second temperature sensor is arranged on a water outlet pipe of a water outlet pipeline of the water ring vacuum pump and is connected with the PLC control cabinet.
And an alarm is connected and arranged in the PLC control cabinet.
And a touch screen panel for manual adjustment is arranged on the PLC control cabinet.
The utility model has the beneficial effects based on the technical scheme that: (1) according to the utility model, the first temperature sensor is arranged on the water inlet pipe of the water outlet pipeline of the water ring vacuum pump, the electric valve is arranged on the pipeline of the heat exchanger, the PLC control cabinet receives a temperature signal and controls the opening and closing of the electric valve to realize the automatic back flushing of the heat exchanger of the water ring vacuum pump, and each device has a simple structure and lower cost. (2) The automatic backwashing system provided by the utility model reduces the labor intensity of workers, avoids manual misoperation and improves the running economy of a unit. (3) According to the utility model, the PLC control cabinet is internally provided with the alarm, so that when equipment breaks down or the temperature of a cooling water source is too high in summer, the temperature of working fluid in the water ring vacuum pump is too high, and the heat exchange effect is not obvious, an alarm can be given out, and a worker can timely replace the working fluid of the water ring vacuum pump and arrange and repair the equipment. (4) According to the utility model, the PLC control cabinet is provided with the touch screen panel, so that the automatic mode and the manual mode of the backwashing system can be switched to cope with emergency situations; meanwhile, the flushing time of automatic backwashing can be adjusted according to the running condition of the unit, the overlong or overlong flushing time is avoided, and in addition, the real-time temperatures of the first temperature sensor and the second temperature sensor can be displayed in real time.
Drawings
FIG. 1 is a schematic connection diagram of an automatic backwashing system for a water ring vacuum pump heat exchanger provided by the utility model;
FIG. 2 is a flow chart of the operation of the automatic backwashing system for the heat exchanger of the water ring vacuum pump provided by the utility model;
in the figure: 1-a water ring vacuum pump, 11-a water inlet pipe of a water outlet pipeline, 12-a water outlet pipe of the water outlet pipeline, 2-a circulating pump, 3-a heat exchanger, 4-a PLC control cabinet, 51-a first temperature sensor, 52-a second temperature sensor, 6-a heat exchange water inlet pipe, 6 a-a heat exchange water inlet pipe electric valve, 7-a heat exchange water outlet pipe, 7 a-a heat exchange water outlet pipe electric valve, 8-a backwashing water inlet pipe, 8 a-a backwashing water inlet pipe electric valve, 9-a backwashing water outlet pipe and 9 a-a backwashing water outlet pipe electric valve.
Detailed Description
The utility model is further illustrated by the following figures and examples.
A connection schematic diagram of an automatic backwashing system for a water ring vacuum pump heat exchanger is shown in figure 1, wherein a water inlet pipe 11 of a water outlet pipeline of a water ring vacuum pump 1 and a water outlet pipe 12 of the water outlet pipeline are connected with a heat exchanger 3, and a circulating pump 2 is connected on the water outlet pipe of the water outlet pipeline, so that circulating heat exchange of cooling water of the vacuum pump on the water outlet pipeline is realized. In this embodiment, the heat exchanger is a plate heat exchanger, the hot end of the heat exchanger is connected with a water outlet pipeline of a water ring vacuum pump, the cold end of the heat exchanger is connected with a cooling water source of rivers, lakes and seas, and the cold end of the heat exchanger comprises a heat exchange water inlet pipe 6, a heat exchange water outlet pipe 7, a backwashing water inlet pipe 8 and a backwashing water outlet pipe 9. The cooling water source flows to the heat exchanger through the heat exchange water inlet pipe, and is discharged through the heat exchange water outlet pipe after absorbing and exchanging heat. During back flushing, cooling water flows to the heat exchanger through the back flushing water inlet pipe and is discharged through the back flushing water outlet pipe.
The automatic backwashing system in the embodiment comprises a PLC control cabinet 4, a first temperature sensor 51, a second temperature sensor 52 and an electric valve. The electric valves are four and are respectively arranged on the heat exchange water inlet and outlet pipe and the backwashing water inlet and outlet pipe, and sequentially comprise a heat exchange water inlet pipe electric valve 6a, a heat exchange water outlet pipe electric valve 7a, a backwashing water inlet pipe electric valve 8a and a backwashing water outlet pipe electric valve 9 a. The first temperature sensor and the second temperature sensor are respectively connected to the water inlet pipe and the water outlet pipe of the water outlet pipeline of the water ring vacuum pump, and the electric valve, the first temperature sensor and the second temperature sensor are all connected with the PLC control cabinet. And the PLC receives a signal of the first temperature sensor and controls the switch of the electric valve to realize automatic back washing of the water ring vacuum pump heat exchanger. A touch screen panel for manual adjustment is arranged on the PLC control cabinet, and the automatic mode and the manual mode of the backwashing system can be switched through the touch screen panel to deal with emergency situations; the automatic backwashing flushing time can be adjusted according to the running condition of the unit on the touch screen panel, so that the phenomenon that the flushing time is too long or too short is avoided, and in addition, the real-time temperature signals of the first temperature sensor and the second temperature sensor can be displayed on the touch screen panel in real time. PLC switch board in-connection is provided with the alarm, and when the temperature difference that received first temperature sensor's temperature surpassed threshold value and first temperature sensor and second temperature sensor was less than 2 ℃, the alarm sends out the police dispatch newspaper, avoids the problem that the heat exchange efficiency is low because of the heat exchanger trouble or when summer the high cooling water source temperature leads to, and the staff can in time change the working solution of water ring vacuum pump simultaneously, avoids the too high influence to water ring vacuum pump life-span and work efficiency of working solution temperature. The associated software routines for receiving temperature sensor signals, for controlling electrically actuated valves, for controlling touch screen panels, and for controlling alarms in a PLC control cabinet are conventional and well known to those skilled in the art.
The working principle of the automatic backwashing system is as follows: (1) parameters such as alarm threshold temperature, backwashing system starting temperature, backwashing operation time and the like are adjusted through a touch screen panel, wherein the threshold temperature is 40 ℃, the backwashing system starting temperature is 35 ℃, and the backwashing operation time is 10 min; (2) when the first temperature sensor monitors the temperature T on the water inlet pipe of the water outlet pipeline1When the temperature is more than or equal to 35 ℃, the PLC control cabinet receives the temperature signal and sends an opening instruction to the electric valve of the backwashing water inlet pipe and the electric valve of the backwashing water outlet pipe; (2) meanwhile, the PLC control cabinet sends a closing instruction to the electric valve of the heat exchange water inlet pipe and the electric valve of the heat exchange water outlet pipe, so that automatic backwashing is realized, and the backwashing time can be adjusted, wherein in the embodiment, the backwashing is operated for 10min each time; (3) the PLC control cabinet sends an opening instruction to the electric valve of the heat exchange water inlet pipe and the electric valve of the heat exchange water outlet pipe, then sends a closing instruction to the electric valve of the backwashing water inlet pipe and the electric valve of the backwashing water outlet pipe, and backwashing is finished; (4) when the first temperature sensor monitors the temperature T on the water outlet pipeline1Not less than 40 ℃ and the temperature difference T between the first temperature sensor and the second temperature sensor2-T1When the temperature is lower than 2 ℃, an alarm in the PLC control cabinet gives an alarm, and a worker timely handles the fault, wherein the working flow chart is shown in figure 2.
Claims (4)
1. The utility model provides an automatic back flush system for water ring vacuum pump heat exchanger, the business turn over water pipe of outlet conduit of water ring vacuum pump is connected with the heat exchanger, is connected with the circulating pump on outlet conduit's the outlet pipe, and the heat exchanger includes heat transfer business turn over water pipe and back flush business turn over water pipe, its characterized in that: the automatic backwashing system comprises a PLC control cabinet, four first temperature sensors and electric valves, wherein the electric valves are arranged and are respectively installed on a heat exchange water inlet/outlet pipe and a backwashing water inlet/outlet pipe, the first temperature sensors are connected to a water inlet pipe of a water outlet pipeline of the water ring vacuum pump, and the electric valves and the first temperature sensors are connected with the PLC control cabinet.
2. The automatic backwashing system for the heat exchanger of the water ring vacuum pump of claim 1, wherein: and a second temperature sensor is arranged on a water outlet pipe of a water outlet pipeline of the water ring vacuum pump and is connected with the PLC control cabinet.
3. The automatic backwashing system for the heat exchanger of the water ring vacuum pump of claim 1, wherein: and an alarm is connected and arranged in the PLC control cabinet.
4. The automatic backwashing system for the heat exchanger of the water ring vacuum pump of claim 1, wherein: and a touch screen panel for manual adjustment is arranged on the PLC control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122448331.XU CN215832561U (en) | 2021-10-12 | 2021-10-12 | Automatic backwashing system for water ring vacuum pump heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122448331.XU CN215832561U (en) | 2021-10-12 | 2021-10-12 | Automatic backwashing system for water ring vacuum pump heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215832561U true CN215832561U (en) | 2022-02-15 |
Family
ID=80202394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122448331.XU Expired - Fee Related CN215832561U (en) | 2021-10-12 | 2021-10-12 | Automatic backwashing system for water ring vacuum pump heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215832561U (en) |
-
2021
- 2021-10-12 CN CN202122448331.XU patent/CN215832561U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220215 |