CN214837323U - Outer circulation water supply system of jet pump machine seal in landfill leachate MBR process system - Google Patents
Outer circulation water supply system of jet pump machine seal in landfill leachate MBR process system Download PDFInfo
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- CN214837323U CN214837323U CN202120223643.8U CN202120223643U CN214837323U CN 214837323 U CN214837323 U CN 214837323U CN 202120223643 U CN202120223643 U CN 202120223643U CN 214837323 U CN214837323 U CN 214837323U
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- pipeline
- pressure water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 19
- 230000001502 supplementing effect Effects 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000001802 infusion Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 238000002637 fluid replacement therapy Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000012533 medium component Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
An outer circulation water supply system of a jet pump mechanical seal in a landfill leachate MBR process system is characterized in that a set of outer circulation water supply system is added, and clean cooling circulation water (a circulation medium entering the mechanical seal) is provided for a jet pump mechanical seal by the outer circulation water supply system. According to the circulating water flowing direction, the external circulating water supply system sequentially comprises a pressure water tank, a forced circulating pump, a mechanical seal, a circulating water cooling device, a forced circulating pump inlet pipeline connected between the pressure water tank and a forced circulating pump inlet, an inlet pipeline connected between the mechanical seal inlet and a forced circulating pump outlet, a front cooling pipeline connected between the mechanical seal outlet and the circulating water cooling device inlet, and a return pipeline connected between the circulating water cooling device outlet and the pressure water tank.
Description
Technical Field
The utility model relates to a landfill leachate MBR process system especially relates to an extrinsic cycle water supply system that jet pump machine sealed among landfill leachate MBR process system.
Background
At present, in a landfill leachate treatment system, an MBR system mainly functions to remove nitrogen and phosphorus and remove a part of COD, and because the a/O system in the MBR system (an external Membrane bioreactor, Membrane Bio-Reactor, a novel water treatment technology combining an activated sludge process and a Membrane separation technology) has a high sludge content, an inlet pipeline of the a/O system (a nitrification and denitrification system) needs to use a jet centrifugal pump to circulate media in the a/O system. Meanwhile, the jet centrifugal pump needs to cool and lubricate a mechanical seal in operation. The mechanical seal of the jet centrifugal pump is internally provided with a circulation gap, and when a circulation medium flows into the circulation gap, the mechanical seal is cooled and lubricated. In the prior art, the medium in the A/O system is also used as a cooling and lubricating medium entering the internal clearance of the mechanical seal of the jet flow centrifugal pump.
The main circulating medium of the A/O system is a muddy water mixture, and part of particles and a small part of chemical agents are mixed in the A/O system, so that the circulating jet pump of the system is complex in medium flowing, the mechanical seal of the system runs for a long time under the condition that the medium circulates, part of residues in the medium can block compensation parts such as a spring, an O-shaped ring and the like of the mechanical seal, and meanwhile, due to the characteristic that the working medium is easy to scale, a severe scaling phenomenon can be formed in a sealing cavity of the mechanical seal after the mechanical seal runs for a long time, and the normal running of the mechanical seal is particularly influenced.
On the other hand, due to the particularity of the medium components, a liquid film formed by the mechanical seal in the operation process is unstable, so that the mechanical seal is subjected to dry grinding of the end face of the mechanical seal, medium vaporization and the like in the operation process, the service life of the mechanical seal is seriously influenced, and the normal operation of the jet pump is greatly influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art problem, the utility model provides an extrinsic cycle water supply system that jet pump machine sealed among landfill leachate MBR process systems, through increasing one set of extrinsic cycle water supply system, provide clear refrigeration cycle water (get into the inside circulation medium of mechanical seal) by extrinsic cycle water supply system to jet centrifugal pump mechanical seal, make jet centrifugal pump mechanical seal obtain abundant cooling and lubrication, further strengthen sealed effect and improve life, ensure that the AO system keeps good running state for a long time, thereby effectual solution prior art problem.
The utility model provides a scheme of its technical problem is: an external circulation water supply system of a jet pump mechanical seal in a landfill leachate MBR process system is characterized by sequentially comprising a pressure water tank, a forced circulation pump, a mechanical seal, a circulating water cooling device, a forced circulation pump inlet pipeline connected between the pressure water tank and a forced circulation pump inlet, an inlet pipeline connected between the mechanical seal inlet and a forced circulation pump outlet, a front cooling pipeline connected between a mechanical seal outlet and a circulating water cooling device inlet, and a return pipeline connected between the circulating water cooling device outlet and the pressure water tank according to the circulating water flowing direction;
the pressure water tank is internally provided with a pressurizable cavity, the lower part of the pressure water tank cavity is provided with circulating water, the upper part of the pressure water tank cavity is provided with compressed air, and the top of the pressure water tank is provided with a pressure gauge;
pipeline stop valves are respectively arranged on the inlet pipeline of the forced circulation pump and the return pipeline;
a liquid supplementing pump is further arranged, a liquid supplementing pipeline is connected between the liquid supplementing pump and the pressure water tank, and a one-way valve is arranged on the liquid supplementing pipeline to enable liquid (water) to flow into the pressure water tank from the liquid supplementing pump in one way only;
and under the action of the forced circulation pump, circulating water flows into the forced circulation pump, then flows through the mechanical seal and the circulating water cooling device in sequence, and finally flows back to the pressure water tank to form circulation and cooling continuously.
Preferably, a check valve is further arranged on the front cooling pipeline, so that circulating water can only flow into the cooling device from the mechanical seal in a single direction.
Preferably, the mechanical seal is a double-ended seal.
Preferably, a manual pressurizing handle is further arranged at the top of the pressure water tank.
Preferably, the top of the pressure water tank is further provided with a pressure sensor, the pressure water tank is further provided with a compressed air access pipe, the compressed air access pipe is provided with an electromagnetic control valve, and the pressure sensor transmits an air pressure signal in the pressure water tank to the electromagnetic control valve to control the opening or closing of a pipeline.
Preferably, a pipeline stop valve is further arranged on the liquid supplementing pipeline.
The utility model has the advantages that: the utility model provides an extrinsic cycle water supply system that jet pump machine sealed among landfill leachate MBR process systems, through increasing one set of extrinsic cycle water supply system, provide clear cooling circulation water (get into the inside circulation medium of mechanical seal) by extrinsic cycle water supply system to jet pump mechanical seal, make jet pump mechanical seal obtain abundant cooling and lubrication, further strengthen sealed effect and improve life, ensure that the AO system keeps good running state for a long time, thereby effectual solution prior art problem.
Description of the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of another embodiment of the present invention.
In the figure, the position of the upper end of the main shaft,
1. the device comprises a pressure water tank, a 1.1 first pressure gauge, a 1.2 pressure sensor, a 1.3 manual pressurizing handle, a 1.4 compressed air access pipe, a 1.4A electromagnetic control valve and a 1.5 water level observation window;
2. a forced circulation pump, a 2.1 forced circulation pump inlet pipeline and a 2.1A pipeline filter screen;
3. a double mechanical seal, a 3.1 inlet pipe,
4. a circulating water cooling device, a 4.1 front cooling pipeline, a 4.1A first one-way valve, a 4.2 reflux pipeline and a 4.2A second pressure gauge;
5. a liquid supplementing pump, a 5.1 liquid supplementing pipeline and a 5.1A second one-way valve;
6 a stop valve.
Detailed Description
Fig. 1 is a schematic structural diagram of an embodiment of the present invention. In the figure, the external circulation water supply system of the jet pump mechanical seal in the landfill leachate MBR process system is shown in the embodiment and is characterized by sequentially comprising a pressure water tank 1, a forced circulation pump 2, a double-end-face mechanical seal 3, a circulating water cooling device 4, a forced circulation pump inlet pipeline 2.1 connected between the pressure water tank 1 and the inlet of the forced circulation pump 2, an inlet pipeline 3.1 connected between the inlet of the double-end-face mechanical seal 3 and the outlet of the forced circulation pump, a front cooling pipeline 4.1 connected between the outlet of the double-end-face mechanical seal 3 and the inlet of the circulating water cooling device 4, and a return pipeline 4.2 connected between the outlet of the circulating water cooling device 4 and the pressure water tank 1 according to the circulating water flow direction.
The pressure water tank 1 is internally provided with a pressurizable cavity, the lower part of the cavity of the pressure water tank 1 is circulating water, the upper part of the cavity of the pressure water tank 1 is compressed air, the top of the pressure water tank 1 is provided with a manual medium-pressure handle 1.3 (the inside of the pressure water tank 1 is similar to a manual sprayer structure), and the pressure water tank is further provided with a first pressure gauge 1.1.
A first one-way valve 4.1A is also arranged on the front cooling pipeline 4.1, so that circulating water can only flow into the cooling device from the mechanical seal in one way.
The return pipeline 4.2 is also provided with a second pressure gauge 4.2A and a pipeline stop valve respectively, the inlet pipeline 2.1 of the forced circulation pump is provided with a pipeline filter screen 2.1A, and the pipeline stop valve is also arranged behind the pipeline filter screen 2.1A (according to the flowing direction, the water flow comes first is called as before).
Still set up fluid infusion pump 5, be connected fluid infusion pipeline 5.1 between fluid infusion pump 5 and the pressure water tank 1, set up second check valve 5.1A on fluid infusion pipeline 5.1, still be provided with pipeline stop valve 6. The liquid (water) can only flow into the pressure water tank 1 from the fluid replacement pump 5 in one direction.
Under the action of the forced circulation pump 2, circulating water flows into the forced circulation pump 2, then sequentially flows into the double-end-face mechanical seal 3 and the circulating water cooling device 4, and finally flows back into the pressure water tank 1 to continuously form circulation and cooling.
Water in the pressure water tank 1 enters the double-end-face mechanical seal 3 through the inlet pipeline 3.1, a stable liquid film is formed in an inner gap of the double-end-face mechanical seal 3, the water temperature rises after the cooling and heat exchange effects, the water temperature is reduced after passing through the circulating water cooling device 4, and then the water returns to the pressure water tank 1 through the return pipeline 4.2.
In this example, the pressure tank 1 can be pressurized by the manual pump handle 1.3, and the pressure is controlled between 0.2 Mpa and 0.3Mpa (which is 0.1Mpa higher than the pressure of the external medium of the double mechanical seal 3).
In the operation process, because the medium pressure of the external circulation water supply system is larger than the A/O medium pressure, the circulating water leaks due to pressure difference, the circulating water of the external circulation water supply system is continuously lost, and the water level of the pressure water tank 1 is reduced. When the water level drops to a certain degree, the pressure water tank 1 is replenished by the liquid replenishing pump 5, thereby ensuring that the water level in the pressure water tank 1 is restored to normal. The phenomenon that the double-end mechanical seal 3 is dry-ground due to the shortage of circulating water, and the mechanical seal is frequently damaged due to high temperature generated by vaporization of a medium is avoided.
In the embodiment, the outer circulation water supply system is added, and clean cooling circulating water (circulating medium entering the mechanical seal) is provided for the mechanical seal of the jet flow centrifugal pump by the outer circulation water supply system, so that the mechanical seal of the jet flow centrifugal pump is sufficiently cooled and lubricated, the sealing effect is further enhanced, the service life is prolonged, the A/O system is ensured to keep a good running state for a long time, and the problems in the prior art are effectively solved.
Fig. 2 is a schematic structural diagram of another embodiment of the present invention. In contrast to the first exemplary embodiment, in this case, the pressure tank is automatically pressurized by means of compressed air as a pressure source for the pressure tank 1. The top of the pressure water tank 1 is provided with a pressure sensor 1.2 and a compressed air inlet pipe 1.4, and an electromagnetic control valve 1.4A is arranged on the pipe to control the opening or closing of an air pipeline. When the pressure sensor 1.2 monitors that the air pressure in the pressure water tank 1 is lower than a set value, the pressure sensor 1.2 transmits a signal to the electromagnetic control valve 1.4A, the electromagnetic control valve 1.4A is opened, compressed air enters the pressure water tank 1, and when the air pressure in the tank rises to the set value, the pressure sensor 1.2 transmits a signal to the electromagnetic control valve 1.4A, and the electromagnetic control valve 1.4A is closed. Thereby enabling automatic control of the pressure inside the pressure tank 1.
Claims (6)
1. An external circulation water supply system of a jet pump mechanical seal in a landfill leachate MBR process system is characterized by sequentially comprising a pressure water tank, a forced circulation pump, a mechanical seal, a circulating water cooling device, a forced circulation pump inlet pipeline connected between the pressure water tank and a forced circulation pump inlet, an inlet pipeline connected between the mechanical seal inlet and a forced circulation pump outlet, a front cooling pipeline connected between a mechanical seal outlet and a circulating water cooling device inlet, and a return pipeline connected between the circulating water cooling device outlet and the pressure water tank according to the circulating water flowing direction;
the pressure water tank is internally provided with a pressurizable cavity, the lower part of the pressure water tank cavity is provided with circulating water, the upper part of the pressure water tank cavity is provided with compressed air, and the top of the pressure water tank is provided with a pressure gauge;
pipeline stop valves are respectively arranged on the inlet pipeline of the forced circulation pump and the return pipeline;
a liquid supplementing pump is further arranged, a liquid supplementing pipeline is connected between the liquid supplementing pump and the pressure water tank, and a one-way valve is arranged on the liquid supplementing pipeline to enable liquid to flow into the pressure water tank from the liquid supplementing pump in a one-way mode only;
and under the action of the forced circulation pump, circulating water flows into the forced circulation pump, then flows through the mechanical seal and the circulating water cooling device in sequence, and finally flows back to the pressure water tank to form circulation and cooling continuously.
2. The MBR process system for landfill leachate according to claim 1, wherein the front cooling pipe is further provided with a one-way valve to make the circulating water flow into the cooling device from the mechanical seal in one way only.
3. The external circulation water supply system of the jet pump machine seal in the landfill leachate MBR process system of claim 2, wherein the mechanical seal is a double-end-face seal.
4. The external circulation water supply system of the jet pump mechanical seal in the landfill leachate MBR process system as set forth in claim 2, wherein a manual pressurization handle is further provided at the top of the pressure water tank.
5. The external circulation water supply system of the jet pump machine seal in the landfill leachate MBR process system as claimed in claim 2, wherein a pressure sensor is further provided at the top of the pressure water tank, a compressed air inlet pipe is further provided, an electromagnetic control valve is provided on the compressed air inlet pipe, and the pressure sensor transmits an air pressure signal in the pressure water tank to the electromagnetic control valve to control the opening or closing of the pipeline.
6. The external circulation water supply system of the jet pump mechanical seal in the landfill leachate MBR process system as set forth in claim 2, wherein a pipeline stop valve is further disposed on the solution supplementing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120223643.8U CN214837323U (en) | 2021-01-26 | 2021-01-26 | Outer circulation water supply system of jet pump machine seal in landfill leachate MBR process system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120223643.8U CN214837323U (en) | 2021-01-26 | 2021-01-26 | Outer circulation water supply system of jet pump machine seal in landfill leachate MBR process system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837323U true CN214837323U (en) | 2021-11-23 |
Family
ID=78953128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120223643.8U Active CN214837323U (en) | 2021-01-26 | 2021-01-26 | Outer circulation water supply system of jet pump machine seal in landfill leachate MBR process system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837323U (en) |
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2021
- 2021-01-26 CN CN202120223643.8U patent/CN214837323U/en active Active
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| GR01 | Patent grant | ||
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Address after: 13 / F, Times financial center, 4001 Shennan Avenue, Futian District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Energy and environmental protection Co.,Ltd. Patentee after: WUHAN SHENNENG ENVIRONMENTAL PROTECTION NEW DITCH WASTE POWER GENERATION Co.,Ltd. Patentee after: Guilin Shenneng environmental protection Co.,Ltd. Patentee after: Shanxian Shenneng environmental protection Co.,Ltd. Patentee after: Shenzhen Shenneng environmental protection East Co.,Ltd. Patentee after: Chaozhou Shenneng environmental protection Co.,Ltd. Patentee after: Shenzhen Shenneng Environmental Protection City Environmental Service Co.,Ltd. Address before: 13 / F, Times financial center, 4001 Shennan Avenue, Futian District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN ENERGY ENVIRONMENTAL ENGINEERING Co.,Ltd. Patentee before: WUHAN SHENNENG ENVIRONMENTAL PROTECTION NEW DITCH WASTE POWER GENERATION Co.,Ltd. Patentee before: Guilin Shenneng environmental protection Co.,Ltd. Patentee before: Shanxian Shenneng environmental protection Co.,Ltd. Patentee before: Shenzhen Shenneng environmental protection East Co.,Ltd. Patentee before: Chaozhou Shenneng environmental protection Co.,Ltd. Patentee before: Shenzhen Shenneng Environmental Protection City Environmental Service Co.,Ltd. |