CN217340855U - Immersed ultrafiltration membrane chemical cleaning liquid medicine recycling system - Google Patents
Immersed ultrafiltration membrane chemical cleaning liquid medicine recycling system Download PDFInfo
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- CN217340855U CN217340855U CN202221174644.9U CN202221174644U CN217340855U CN 217340855 U CN217340855 U CN 217340855U CN 202221174644 U CN202221174644 U CN 202221174644U CN 217340855 U CN217340855 U CN 217340855U
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Abstract
The utility model discloses an submergence formula milipore filter chemical cleaning liquid medicine recycling system, including submergence formula membrane pond, chemical cleaning water tank, neutralization pond. An immersed ultrafiltration membrane component is arranged in the immersed membrane pool. And a membrane pool emptying port is arranged at the bottom of the immersed membrane pool. One path connected with the emptying port of the immersed membrane tank is a chemical cleaning medicine feeding and liquid medicine recycling pipeline which is communicated with a chemical cleaning water tank; the other path is communicated with a neutralization tank. The immersed ultrafiltration membrane component is communicated with a water replenishing port on the upper part of the chemical cleaning water tank through a water production pipe; the upper part of the chemical cleaning water tank is also provided with a medicament stock solution inlet. The lower part of the chemical cleaning water tank is of a conical bottom structure, and the conical bottom is communicated with the neutralization tank. The utility model discloses carry out the retrieval and utilization to submergence formula milipore filter chemical cleaning liquid medicine, can show and reduce the medicine and consume, optimize the operation regulation and control of membrane system, the whole life-span of extension system.
Description
Technical Field
The utility model belongs to the tap water advanced treatment field especially relates to an submergence formula milipore filter chemical cleaning liquid medicine recycling system.
Background
In recent years, with the continuous development of economic society of China, the problem of drinking water source pollution becomes more and more severe, and the drinking water safety guarantee becomes an environmental and health problem which is highly concerned by international society at present. The new generation drinking water treatment process taking the membrane technology as the core has the advantages of excellent interception efficiency of particles, colloid and pathogenic microorganisms, small using amount of disinfectant, intensive occupied area, convenient realization of automation and the like. The ultrafiltration membrane can effectively remove pathogenic microorganisms such as 'two worms', bacteria and even viruses and the like in water by virtue of the sieving and intercepting effects of the nanometer-scale pore size, so that the biological safety of the drinking water realizes a leap from relative safety to absolute safety. With continuous deep theoretical research and extensive engineering application attempts, the module configuration and the operation mode of the ultrafiltration membrane are systematically optimized. The immersed hollow fiber ultrafiltration membrane system is widely favored by industrial and municipal customers by virtue of the advantages of large scale of a single membrane stack, low operation energy consumption, strong anti-fouling and anti-blocking capacity of the membrane, high water production recovery rate, low failure rate of auxiliary equipment and the like.
After the immersed hollow fiber ultrafiltration membrane system produces water for a certain time, the membrane component needs to be chemically cleaned to relieve the pollution and blockage on the surface of the ultrafiltration membrane. However, when the on-line chemical cleaning is carried out, the volume of the immersed ultrafiltration membrane pool is large, the invalid volume is large, the proportion of the medicament which effectively contacts the membrane surface and carries out the chemical elution effect on the pollutants in the total medicament dose is not high, and a certain proportion of the medicament is discharged into a wastewater pool along with the waste liquid; at the same time, the amount of neutralizing agent used is increased so as not to cause secondary pollution to the environment. The excessive consumption of these two parts of chemicals leads to an increase in the overall drug consumption, which undoubtedly results in an increase in the cost of the submerged ultrafiltration membrane system where the cost of drug consumption is nearly half of the total operating cost. In addition, the immersed ultrafiltration membrane system adopting online cleaning has higher requirements on corrosion prevention of the inner wall and the pipeline of the membrane pool, if chemicals with higher concentration still exist in the chemical cleaning waste liquid, the corrosion prevention service life of the system is shortened, and the system is damaged in a concealed way.
Disclosure of Invention
To the technical problem, the utility model provides an submergence formula milipore filter chemical cleaning liquid medicine recycling system, specific technical scheme is as follows:
the utility model provides an submergence formula milipore filter chemical cleaning liquid medicine recycling system's primary structure does:
comprises an immersed membrane pool, a chemical cleaning water tank and a neutralization pool;
an immersed ultrafiltration membrane component is arranged in the membrane pool and is used as a core unit of water production, and the immersed ultrafiltration membrane component is communicated with a water replenishing port at the upper part of the chemical cleaning water tank through a water production pipe; the upper part of the chemical cleaning water tank is also provided with a medicament stock solution inlet;
a membrane pool emptying port is arranged at the bottom of the immersed membrane pool; one path connected with the emptying port of the membrane pool is a chemical cleaning medicine feeding and liquid medicine recycling pipeline which is communicated with a chemical cleaning water tank; the other path is communicated with a neutralization tank;
and (3) introducing the filtered water into a clean water tank through a water producing sub-pipe and a water producing mother pipe by using a water producing pump, and taking the filtered water as dispensing water of the chemical cleaning liquid medicine. The bottom of the membrane pool is provided with a drain port which is also a chemical inlet of the chemical cleaning water tank.
The lower part of the chemical cleaning water tank is of a conical bottom structure, and the conical bottom is communicated with the neutralization tank.
Judging whether the liquid medicine meets the recycling standard or not after chemical cleaning, emptying the liquid medicine which does not meet the recycling standard through an emptying pipe, adding a neutralizing agent, and then discharging the liquid medicine into a neutralizing tank; and returning the liquid medicine which meets the recycling standard to a chemical cleaning water tank to wait for dispensing.
Furthermore, the chemical cleaning water tank and the immersed membrane pool are connected with the chemical analysis module through sampling pipes.
Furthermore, a liquid medicine recycling pipeline is communicated with the lower part of the chemical cleaning water tank, and a self-cleaning filter and a liquid medicine recycling valve are arranged on the pipeline. The diameter of the filter screen of the self-cleaning filter is required to be smaller than 500 μm in general, so as to intercept inorganic scaling substances, organic matters such as biological membranes and the like and larger suspended particles which are remained in waste liquid after the self-cleaning filter falls off from the surface of the membrane after chemical cleaning, prevent the impurities from entering the chemical cleaning liquid medicine again, and ensure the safety of the ultrafiltration membrane.
Further, the recycling system is provided with an emptying pipe communicated with the neutralization tank; one path of the membrane pool emptying port communicated with the neutralization pool is communicated with the neutralization pool through a membrane pool emptying valve, a system emptying valve and an emptying pipe; the cone bottom of the chemical cleaning water tank is communicated with an emptying pipe through a cleaning water tank emptying valve so as to be connected with a neutralization pond.
Furthermore, the upper part of the chemical cleaning water tank is also connected with an overflow pipe which is higher than a water replenishing port and a medicament stock solution inlet of the chemical cleaning water tank; the other end of the overflow pipe is communicated with the neutralization tank through an emptying pipe.
Furthermore, an emptying pipeline flowmeter is arranged on the emptying pipe to monitor the flow of the pipeline.
Further, a pH meter and an ORP meter are arranged in the neutralization tank, and when the pH and the ORP of the waste liquid in the neutralization tank exceed normal ranges, acid, alkali or a reducing agent is added into the neutralization tank, so that the neutralization effect is ensured. The ORP meter monitors the oxidation-reduction potential (i.e. ORP value) of the neutralization tank, and when the ORP is beyond the normal range, the oxidizing agent (mainly sodium hypochlorite) is proved to be not completely neutralized, and then the reducing agent is added for neutralization.
Furthermore, a chemical liquid valve of the cleaning water tank is arranged at the middle lower part of the chemical cleaning water tank and is used as an outlet of the cleaning liquid, and a liquid circulating pump and a membrane pool liquid inlet pump are connected in parallel behind the chemical liquid valve of the cleaning water tank; the liquid medicine circulating pump is communicated with a water replenishing port of the chemical cleaning water tank to control liquid medicine circulation; the membrane pool medicine inlet pump is communicated with a membrane pool emptying port through a membrane pool medicine inlet valve and a membrane pool emptying valve, and medicine inlet of the immersed membrane pool is controlled.
Furthermore, a cleaning water tank liquid level meter is arranged at the top of the chemical cleaning water tank to monitor the liquid level in the chemical cleaning water tank.
Preferably, the immersed ultrafiltration membrane component is an immersed hollow fiber ultrafiltration membrane component.
The utility model provides an submergence formula milipore filter chemical cleaning liquid medicine recycling system's technical characterstic has:
1. a self-cleaning filter with higher precision is arranged on a connecting pipeline of a membrane pool emptying port and a chemical cleaning water tank, organic matters such as inorganic scaling substances, biological membranes and the like which are remained in waste liquid after the chemical cleaning and fall off from the surface of a membrane and larger suspended particles are prevented from entering chemical cleaning liquid medicine again, and the safety of the ultrafiltration membrane is ensured.
2. And arranging a sampling pipe in the immersed membrane pool, sampling the liquid medicine after chemical cleaning, sending the liquid medicine to a chemical analysis module, detecting the activity of effective cleaning agents in the liquid medicine after chemical cleaning, and refluxing the liquid medicine meeting the recycling standard into a chemical cleaning water tank.
3. The chemical cleaning water tank is additionally provided with a conical bottom design, a discharge port is additionally arranged, and a pipeline is connected to the neutralization tank. Suspended matter impurities which are not intercepted by the self-cleaning filter and accumulated in the cleaning water tank in the recycling liquid medicine can be discharged, the suspended matter impurities are prevented from entering the membrane pool again, meanwhile, the concentration of other substances except the effective cleaning medicament in the newly prepared chemical cleaning liquid medicine is reduced, and the chemical cleaning effect of the ultrafiltration membrane is ensured.
4. And a pH meter and an ORP meter are arranged in the neutralization tank, and when the pH and the ORP of the waste liquid in the neutralization tank exceed normal ranges, acid, alkali or a reducing agent is added into the neutralization tank, so that the neutralization effect is ensured.
Compared with the prior art, the utility model beneficial effect who has does:
1. the chemical cleaning agent has high utilization efficiency. The chemical agents which are not fully reacted in the chemical cleaning are recycled, so that the utilization rate of the agents is improved, the dosage of the chemical cleaning agents is effectively reduced, and the medicine consumption cost is saved in operation.
2. Greatly reduces the dosage of the neutralizing agent. Usually, a neutralizing agent is added for neutralization when the chemical cleaning waste liquid is discharged, so that secondary pollution to the environment is avoided. Through the recycling system, effective cleaning components in the waste liquid after cleaning are fully utilized, the amount of the medicament to be neutralized is reduced, the dosage of the neutralizing medicament is greatly reduced, and the medicament consumption is saved.
3. Through the monitoring of membrane cleaning effect and the adjustment of chemical cleaning liquid medicine concentration, can explore the best washing concentration under the current operating mode, reduce liquid medicine concentration as far as possible on the basis of guaranteeing the cleaning effect, alleviate the anticorrosive damage to the membrane pond, alleviateed the damage of chemical cleaning to milipore filter itself simultaneously, prolonged the whole life-span of system.
Drawings
Fig. 1 is a schematic view of a chemical cleaning liquid recycling system for an immersed ultrafiltration membrane according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the following description of the present invention is provided in conjunction with the accompanying drawings.
Example (b): fig. 1 mainly includes an immersed ultrafiltration membrane tank, a chemical cleaning water tank, a neutralization tank, and auxiliary systems (a chemical analysis room, a pump, a valve, a pipeline, and an instrument), fig. 1 shows the liquid level of the immersed ultrafiltration membrane during online chemical cleaning, and the liquid in the membrane tank is a chemical cleaning liquid, which is generally an acid cleaning agent, an alkali cleaning agent, or a chlorine cleaning agent (sodium hypochlorite). In the figure, only one membrane tank and one cleaning water tank are provided for explaining the embodiment, and when the actual ultrafiltration membrane system operates, a plurality of groups of membrane tanks and cleaning water tanks share part of valves and pipelines, so that the operation of the embodiment is not affected, and the description is omitted in the embodiment.
An immersed ultrafiltration membrane component 1 is arranged in the immersed membrane pool and is used as a water production core unit; the immersed ultrafiltration membrane component 1 is communicated with a water replenishing port at the upper part of the chemical cleaning water tank through a water production pipe; the upper part of the chemical cleaning water tank 16 is also provided with a medicament stock solution inlet; the bottom of the immersed membrane pool is provided with a membrane pool emptying port 2; one path connected with the membrane pool emptying port 2 is a chemical cleaning liquid recycling pipeline which is communicated with a chemical cleaning water tank 16; the other path is communicated with a neutralization tank 26; the immersed membrane pool utilizes the water producing pump 20 to lead the filtered water into the clean water pool through the water producing sub-pipe and the water producing mother pipe, and simultaneously, the filtered water is used as the dispensing water of the chemical cleaning liquid medicine. The bottom of the membrane pool is provided with a membrane pool emptying port 2 which is also a chemical cleaning medicine inlet. The lower part of the chemical cleaning water tank 16 is of a conical bottom structure, and the conical bottom is communicated with a neutralization pond 26; the chemical cleaning water tank 16 is connected to the chemical analysis room through a cleaning water tank sampling tube 18 and an immersed membrane tank through a sampling tube 21.
The liquid medicine recycling pipeline is provided with a self-cleaning filter 3 and a liquid medicine recycling valve 7. The filtering precision of the self-cleaning filter 3 is usually required to be higher than 500 μm to intercept inorganic scaling substances, organic matters such as biological membranes and the like and larger suspended particles which are remained in the waste liquid after the chemical cleaning and fall off from the membrane surface, so as to prevent the impurities from entering the chemical cleaning liquid medicine again and ensure the safety of the ultrafiltration membrane.
The recycling system is provided with an emptying pipe 8 communicated with the neutralization tank 26; the membrane tank emptying port 2 is communicated with the neutralization tank 26 through an emptying pipe 8; the conical bottom of the chemical cleaning tank 16 is communicated with the emptying pipe 8 through the cleaning tank emptying valve 11, thereby being connected with the neutralization tank 26.
The chemical cleaning water tank 16 is also provided with a cleaning water tank overflow pipe 14 which is communicated with the neutralization pond 26 through the emptying pipe 8 and is used as overflow protection of the cleaning water tank, and the overflow pipe 14 is higher than a water replenishing port and a medicament stock solution inlet of the chemical cleaning water tank 16. An emptying pipeline flowmeter 9 is arranged on the emptying pipe 8, the flow rate of the pipeline is monitored, and neutralizing agents in corresponding proportions are added.
A cleaning water tank liquid medicine valve 25 is arranged at the middle lower part of the chemical cleaning water tank 16 and is used as an outlet of cleaning liquid medicine, and a liquid medicine circulating pump 24 and a membrane pool liquid medicine inlet pump 23 are connected in parallel behind the cleaning water tank liquid medicine valve 25; the liquid medicine circulating pump 24 is communicated with a water replenishing port of the chemical cleaning water tank 16 to control liquid medicine circulation; and the membrane pool medicine inlet pump 23 is communicated with the membrane pool emptying port 2 through the membrane pool medicine inlet valve 22 and the membrane pool emptying valve 4 to control the medicine inlet of the immersed membrane pool.
After the membrane system passes through a certain number of normal filtration cycles, the membrane flux is reduced, at the moment, the immersed ultrafiltration membrane component 1 is cleaned on line by using chemical cleaning liquid medicine, the liquid medicine is discharged through a membrane pool emptying port 2 when the cleaning is finished, and the liquid medicine is discharged after being recycled or used as waste liquid and neutralized.
Firstly, according to the technical recommended value of a membrane manufacturer, the activity of an effective chemical agent in the newly prepared chemical cleaning liquid medicine is calculated, and the dosage of the agent is recorded. An on-line chemical analysis instrument is arranged, a sampling tube 21 is arranged in the membrane pool to sample the liquid medicine after chemical cleaning, the activity of effective chemical agents (acid, alkali, sodium hypochlorite and the like) in the liquid medicine is analyzed, the amount of the supplemented agents required by the supplemented agents to reach the designed activity is calculated, and when the amount of the supplemented agents is less than the adding amount of the agents required by new preparation, the recycling standard is met, and the recycling operation is executed. The liquid medicine passes through the self-cleaning filter 3 to filter out attached pollutants and particle suspended matters peeled off by the cleaning of the membrane in the liquid medicine. And opening the liquid medicine recycling valve 7 and the cleaning water tank liquid medicine valve 25 to enable the filtered liquid medicine to automatically flow into the chemical cleaning water tank 16 by gravity for recycling.
After the liquid medicine is recycled for a certain number of times, the concentration of other soluble substances in the liquid medicine is increased, and the elution effect of the chemical agent on pollutants of the ultrafiltration membrane is influenced. When the amount of the supplemented medicament is larger than or equal to the amount of the newly prepared medicament, the reuse standard is not met, and emptying operation is executed. The membrane tank emptying valve 4 and the system emptying valve 10 are opened, so that the waste liquid is neutralized by chemical agents in the emptying pipe 8 and then is introduced into the neutralization tank 26. Other emptying operations of the membrane pool are also carried out through the pipeline. And a pH meter 5 and an ORP meter 6 are arranged in the neutralization tank 26, the pH value and the ORP value of the neutralization tank are monitored in real time, the ORP meter monitors the oxidation-reduction potential (namely the ORP value) of the neutralization tank, when the ORP exceeds a normal range, the situation that an oxidant (mainly sodium hypochlorite) is not completely neutralized is proved to exist, and at the moment, a reducing agent is added for neutralization. When the pH value and the ORP value exceed the normal range, the situation that the overflow of the cleaning water tank or the calculation of the concentration of the liquid medicine is inaccurate is proved to exist, at the moment, the corresponding acidic and alkaline medicaments or reducing agents are added into the neutralization tank, and meanwhile, the cleaning water tank and the chemical cleaning concentration setting are checked.
After the reusable chemical liquid is returned to the chemical cleaning water tank 16, a chemical cleaning chemical liquid is reconstituted. The chemical cleaning water tank is of a conical bottom structure, so that solid impurities can be deposited at the bottom of the water tank conveniently, short static settling time is set before chemical cleaning liquid medicine is reconfigured, and then the emptying valve 11 of the cleaning water tank is opened to perform short emptying. Comparing the residual medicament activity in the waste liquid with the designed activity, and supplementing quantitative medicament and purified water to the recycled waste liquid. Set up and wash water tank sampling tube 18, send to the room for chemical analysis after taking a sample to the liquid medicine of reformulating, detect whether its activity ratio of effectively wasing the medicament reaches the design value, guarantee to prepare and obtain the liquid medicine that satisfies the chemical cleaning requirement, supply with next chemical cleaning. A cleaning water tank level meter 15 is arranged to monitor the liquid level in the water tank.
When in medicine supplement, the stoste medicine inlet valve 13 and the stoste medicine inlet pump 12 are opened to feed the chemical cleaning stoste into the chemical cleaning water tank 16 according to a certain amount. And during water replenishing, opening the outlet valve 19 of the water production pump and the water replenishing valve 17 of the cleaning water tank, and feeding the filtered water of the normal water production membrane tank into the chemical cleaning water tank 16 as a water replenishing source through the membrane tank water production pump 20. After the water replenishing and medicine supplementing operation is finished, the outlet valve 19 of the water producing pump and the medicine inlet valve 22 of the membrane pool are closed, and the liquid medicine circulating pump 24 is started to fully and uniformly distribute the liquid medicine in the chemical cleaning water tank 16. And when the next chemical cleaning is carried out, opening a cleaning water tank liquid medicine valve 25, a membrane pool medicine inlet pump 23, a membrane pool medicine inlet valve 22 and a membrane pool emptying valve 4, and adding chemical cleaning liquid medicine into the membrane pool.
The above embodiment is only for explaining the utility model discloses a technical thought, can not injecing with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope.
Claims (10)
1. The utility model provides an submergence formula milipore filter chemical cleaning liquid medicine recycling system which characterized in that: comprises an immersed membrane tank, a chemical cleaning water tank and a neutralization tank;
an immersed ultrafiltration membrane component is arranged in the immersed membrane pool; the bottom of the immersed membrane pool is provided with a membrane pool emptying port; one path connected with the emptying port of the membrane pool is a chemical cleaning medicine feeding and liquid medicine recycling pipeline which is communicated with a chemical cleaning water tank; the other path is communicated with a neutralization tank;
the immersed ultrafiltration membrane component is communicated with a water replenishing port on the upper part of the chemical cleaning water tank through a water production pipe; the upper part of the chemical cleaning water tank is also provided with a medicament stock solution inlet;
the lower part of the chemical cleaning water tank is of a conical bottom structure, and the conical bottom is communicated with the neutralization tank.
2. The system for recycling chemical cleaning solution for immersed ultrafiltration membranes according to claim 1, wherein:
the chemical cleaning water tank and the immersed membrane pool are connected with the chemical analysis module through sampling pipes.
3. The system for recycling chemical cleaning solution for immersed ultrafiltration membranes according to claim 1, wherein:
the liquid medicine recycling pipeline is communicated with the lower part of the chemical cleaning water tank, and a self-cleaning filter and a liquid medicine recycling valve are arranged on the pipeline; the filter mesh diameter of the self-cleaning filter is less than 500 mu m.
4. The system for recycling chemical cleaning solution for immersed ultrafiltration membranes according to claim 1, wherein the system comprises:
the recycling system is provided with an emptying pipe communicated with the neutralization tank; one path of the membrane pool emptying port communicated with the neutralization pool is communicated with the neutralization pool through a membrane pool emptying valve, a system emptying valve and an emptying pipe; the cone bottom of the chemical cleaning water tank is communicated with an emptying pipe through a cleaning water tank emptying valve so as to be connected with a neutralization pond.
5. The system according to claim 3, wherein the chemical cleaning solution recycling system comprises:
the upper part of the chemical cleaning water tank is also connected with an overflow pipe, and the overflow pipe is higher than a water replenishing port and a medicament stock solution inlet of the chemical cleaning water tank; the other end of the overflow pipe is communicated with the neutralization tank through an emptying pipe.
6. The system according to claim 3, wherein the chemical cleaning solution recycling system comprises:
an emptying pipeline flowmeter is arranged on the emptying pipe to monitor the flow of the pipeline.
7. The system according to claim 3, wherein the chemical cleaning solution recycling system comprises:
and a pH meter and an ORP meter are arranged in the neutralization tank.
8. The system for recycling chemical cleaning solution of immersed ultrafiltration membrane according to any one of claims 1 to 7, wherein:
a chemical liquid valve of the cleaning water tank is arranged at the middle lower part of the chemical cleaning water tank and is used as an outlet of cleaning liquid, and a liquid circulating pump and a membrane pool medicine inlet pump are connected in parallel behind the chemical liquid valve of the cleaning water tank; the liquid medicine circulating pump is communicated with a water replenishing port of the chemical cleaning water tank to control liquid medicine circulation; the membrane pool medicine inlet pump is communicated with a membrane pool emptying port through a membrane pool medicine inlet valve and a membrane pool emptying valve to control the medicine inlet of the immersed membrane pool.
9. The system for recycling chemical cleaning solution of immersed ultrafiltration membrane according to any one of claims 1 to 7, wherein:
the top of the chemical cleaning water tank is provided with a cleaning water tank liquid level meter for monitoring the liquid level in the chemical cleaning water tank.
10. The system for recycling chemical cleaning solution of immersed ultrafiltration membrane according to any one of claims 1 to 7, wherein:
the immersed ultrafiltration membrane component adopts an immersed hollow fiber ultrafiltration membrane component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221174644.9U CN217340855U (en) | 2022-05-06 | 2022-05-06 | Immersed ultrafiltration membrane chemical cleaning liquid medicine recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221174644.9U CN217340855U (en) | 2022-05-06 | 2022-05-06 | Immersed ultrafiltration membrane chemical cleaning liquid medicine recycling system |
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| Publication Number | Publication Date |
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| CN217340855U true CN217340855U (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221174644.9U Active CN217340855U (en) | 2022-05-06 | 2022-05-06 | Immersed ultrafiltration membrane chemical cleaning liquid medicine recycling system |
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- 2022-05-06 CN CN202221174644.9U patent/CN217340855U/en active Active
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