CN211393999U - Plate heat exchanger back flushing device - Google Patents
Plate heat exchanger back flushing device Download PDFInfo
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- CN211393999U CN211393999U CN201922393124.1U CN201922393124U CN211393999U CN 211393999 U CN211393999 U CN 211393999U CN 201922393124 U CN201922393124 U CN 201922393124U CN 211393999 U CN211393999 U CN 211393999U
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- heat exchanger
- plate heat
- water inlet
- water outlet
- pipeline
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Abstract
The utility model provides a plate heat exchanger back flush device, including circulating pump, operation inlet channel, operation outlet conduit, backwash inlet channel, backwash outlet conduit, the middle part of operation inlet channel, operation outlet conduit, backwash inlet channel and backwash outlet conduit all sets up a control valve, the second end of operation inlet channel with set up a pressure differential sensor between the second end of operation outlet conduit, pressure differential sensor is used for monitoring the second end of operation inlet channel with pressure differential between the second end of operation outlet conduit. The utility model discloses a pressure differential value at pressure differential sensor monitoring plate heat exchanger both ends can be in time, switching device's running state and back flush state effectively, realizes the function of automatic back flush.
Description
Technical Field
The utility model relates to a plate heat exchanger technical field, in particular to plate heat exchanger back flush device.
Background
In the landfill leachate treatment process, under the condition of continuous high temperature in summer, high-concentration activated sludge releases heat through biochemistry, the temperature in a biochemical pond is extremely higher than 38 ℃, the growth of the activated sludge is not facilitated, the activated sludge is cooled through a cooling system, and the temperature in the biochemical system is reduced to meet the growth requirement of the activated sludge. The active sludge in the biochemical system is conveyed to the plate heat exchanger through a cooling sludge pump, and the cooling water in the cooling tower is also conveyed to the plate heat exchanger through a cooling water pump. The thermal active sludge and cooling water from the cooling tower are conducted and heat exchanged through a metal plate in the plate heat exchanger, the cooled active sludge flows back to enter the biochemical reaction tank, and the growth temperature requirement of the active sludge is met through the active sludge after heat exchange of the plate heat exchanger. And cooling water flows back to the cooling tower, the cooling tower is used for cooling and recycling the cooling reflux water after heat exchange, and the evaporation capacity in the cooling tower is supplemented in a mode of supplementing tap water.
In actual operation, because activated sludge needs to enter the plate heat exchanger for heat exchange, the plate heat exchanger is extremely easy to block due to condensation, and when the blockage is serious, plates of the plate heat exchanger are usually required to be detached and cleaned piece by piece, so that the workload is large, and the efficiency is not high. In the prior art, some plate heat exchanger backwashing devices exist, which enable liquid to reversely flow through the plate heat exchanger to reversely flush blockages.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a device that can carry out the back flush automatically to plate heat exchanger.
In order to achieve the above object, the present invention provides a plate heat exchanger backwashing device, which comprises a circulating pump, a running water inlet pipeline, a running water outlet pipeline, a backwashing water inlet pipeline and a backwashing water outlet pipeline, wherein a first end of the running water inlet pipeline is connected with the circulating pump, a second end of the running water inlet pipeline is connected with a first end of the plate heat exchanger, a first end of the running water outlet pipeline is connected with the circulating pump, a second end of the running water outlet pipeline is connected with a second end of the plate heat exchanger, the backwashing water inlet pipeline is respectively communicated with the first end of the running water inlet pipeline and the second end of the running water outlet pipeline, the backwashing water outlet pipeline is respectively communicated with the second end of the running water inlet pipeline and the first end of the running water outlet pipeline, and the middle parts of the running water inlet pipeline, the running water outlet pipeline, the backwashing water inlet, and a differential pressure sensor is arranged between the second end of the operation water inlet pipeline and the second end of the operation water outlet pipeline and is used for monitoring the differential pressure between the second end of the operation water inlet pipeline and the second end of the operation water outlet pipeline.
Further, the control valve is an electromagnetic valve. The plate heat exchanger backwashing device further comprises a controller, and the controller is electrically connected with each control valve and the differential pressure sensor.
The above technical scheme of the utility model has following beneficial effect:
the utility model discloses a plate heat exchanger back flush device through the pressure differential value at differential pressure sensor monitoring plate heat exchanger both ends, can be in time, switching device's running state and back flush state effectively, realize the function of automatic back flush, reduced effectively and relied on consumeing of manual monitoring etc. keep the back flush process of suitable frequency, improve filtration liquid treatment cooling system's cooling efficiency.
Drawings
Fig. 1 is a schematic view of the structure and connection of the present invention.
[ description of reference ]
1-a circulating pump; 2-operating a water inlet pipeline; 3-operating a water outlet pipeline; 4-backwashing the water inlet pipeline; 5-backwashing the water outlet pipeline; 6-plate heat exchanger; 7-a control valve; 8-differential pressure sensor.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a plate heat exchanger backwashing device, which includes a circulation pump 1, a running water inlet pipe 2, a running water outlet pipe 3, a backwashing water inlet pipe 4, and a backwashing water outlet pipe 5. Wherein, the first end of operation inlet channel 2 is connected with circulating pump 1, and the second end is connected with plate heat exchanger 6's first end, and the first end of operation outlet conduit 3 is connected with circulating pump 1, and the second end is connected with plate heat exchanger 6's second end, and plate heat exchanger 6's first end is the entry of activated sludge filtration liquid when normal operating, and the second end is the export.
The backwashing water inlet pipeline 4 is respectively communicated with the first end of the operation water inlet pipeline 2 and the second end of the operation water outlet pipeline 3, and the backwashing water outlet pipeline 5 is respectively communicated with the second end of the operation water inlet pipeline 2 and the first end of the operation water outlet pipeline 3. Meanwhile, the middle parts of the operation water inlet pipeline 2, the operation water outlet pipeline 3, the backwashing water inlet pipeline 4 and the backwashing water outlet pipeline 5 are all provided with a control valve 7 for controlling the opening and closing states of the corresponding pipelines.
When the circulating pump works normally, the control valve 7 of the running water inlet pipeline 2 and the running water outlet pipeline 3 is opened, the control valve 7 of the backwashing water inlet pipeline 4 and the backwashing water outlet pipeline 5 is closed, and the percolate enters the plate heat exchanger 6 through the running water inlet pipeline 3 under the action of the circulating pump 1 and flows out from the second end of the plate heat exchanger 6 and flows back through the running water outlet pipeline 3. During backwashing, the control valves 7 of the backwashing water inlet pipeline 4 and the backwashing water outlet pipeline 5 are opened, the control valves 7 of the operation water inlet pipeline 2 and the operation water outlet pipeline 3 are closed, leachate is pumped by the circulating pump 1, the leachate directly flows through the backwashing water inlet pipeline 4 from the first end of the operation water inlet pipeline 2 and enters from the second end of the plate heat exchanger 6, flows out from the first end of the plate heat exchanger 6 and sequentially flows through the second end of the operation water inlet pipeline 2, and finally flows back to the circulating pump 1 from the first end of the backwashing water outlet pipeline 5 and the first end of the operation water outlet pipeline 3. Therefore, the operation and the backwashing can be switched by simply switching the opening and closing of the control valve 7.
In this embodiment, a pressure difference sensor 8 is arranged between the second end of the operation water inlet pipe 2 and the second end of the operation water outlet pipe 3, and is used for monitoring the pressure difference between the second end of the operation water inlet pipe 2 and the second end of the operation water outlet pipe 3, namely between the first end and the second end of the plate heat exchanger 6. When the pressure difference between the first end and the second end of the plate heat exchanger 6 exceeds a certain value, it indicates that the blockage situation in the plate heat exchanger 6 is serious, and the liquid forms a large pressure difference under the action of the circulating pump 1. The device can thus be switched to a backflush mode, with the plate heat exchanger 6 being backflushed until the pressure difference gradually returns to the normal value and switched back to the operating mode again.
In addition, a fixed back flushing mode of the plate heat exchanger 6 can be set, when the pressure difference between the first end and the second end of the plate heat exchanger 6 exceeds a certain value, the back flushing mode is started and is continued for a preset time, and then the normal operation state is recovered until the next time the pressure difference reaches a set value, and the back flushing mode is started again.
Furthermore, the control valves 7 are all electromagnetic valves, the plate heat exchanger backwashing device further comprises a controller, and the controller is electrically connected with each control valve 7 and the differential pressure sensor 8. The differential pressure sensor 8 monitors the differential pressure at the two ends of the plate heat exchanger 6 on line in real time and feeds the differential pressure back to the controller, and when the differential pressure becomes larger than a preset value, the opening and closing state of the control valve 7 is automatically switched through the logic control of the controller, so that the direction exchange of the water inlet and the water outlet of the plate heat exchanger 6 is realized.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A plate heat exchanger backwashing device is characterized by comprising a circulating pump, a running water inlet pipeline, a running water outlet pipeline, a backwashing water inlet pipeline and a backwashing water outlet pipeline, wherein a first end of the running water inlet pipeline is connected with the circulating pump, a second end of the running water inlet pipeline is connected with a first end of the plate heat exchanger, a first end of the running water outlet pipeline is connected with the circulating pump, a second end of the running water outlet pipeline is connected with a second end of the plate heat exchanger, the backwashing water inlet pipeline is respectively communicated with the first end of the running water inlet pipeline and the second end of the running water outlet pipeline, the backwashing water outlet pipeline is respectively communicated with the second end of the running water inlet pipeline and the first end of the running water outlet pipeline, the middle parts of the running water inlet pipeline, the running water outlet pipeline, the backwashing water inlet pipeline and the backwashing water outlet pipeline are all provided with a control valve, and a pressure difference sensor is arranged between the second end of, the differential pressure sensor is used for monitoring the differential pressure between the second end of the operation water inlet pipeline and the second end of the operation water outlet pipeline.
2. The plate heat exchanger backflushing device according to claim 1, wherein the control valve is a solenoid valve.
3. The plate heat exchanger backflushing apparatus of claim 2 further including a controller electrically connected to each of said control valves and said differential pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922393124.1U CN211393999U (en) | 2019-12-27 | 2019-12-27 | Plate heat exchanger back flushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922393124.1U CN211393999U (en) | 2019-12-27 | 2019-12-27 | Plate heat exchanger back flushing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211393999U true CN211393999U (en) | 2020-09-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922393124.1U Active CN211393999U (en) | 2019-12-27 | 2019-12-27 | Plate heat exchanger back flushing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211393999U (en) |
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2019
- 2019-12-27 CN CN201922393124.1U patent/CN211393999U/en active Active
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