CN110697936A - Purification method of flat ceramic membrane water purifier - Google Patents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/06—Flat membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/20—By influencing the flow
- B01D2321/2066—Pulsated flow
- B01D2321/2075—Ultrasonic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/42—Nature of the water, waste water, sewage or sludge to be treated from bathing facilities, e.g. swimming pools
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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Abstract
The invention relates to the technical field of inorganic ceramic membrane material water purification, in particular to a purification method of a flat ceramic membrane water purifier. The invention relates to a water circulation deep purification process to be treated, which integrates ozone sterilization, flat ceramic membrane filtration, ultrasonic cleaning and pollutant discharge. The invention has the advantages of integrating sterilization and disinfection, simultaneously removing the novel micropollutants EDCs and PPcPs, and improving the removal rate and the inactivation rate of pathogenic microorganisms. The water purifier has the advantages of full-automatic control, small floor area, good effluent quality, no need of adding chlorine-containing disinfectant, and no generation of trihaloalkane byproduct with carcinogenesis, teratogenesis and mutation. The purification method has the advantages of simple operation, unattended operation, remote large-data monitoring, grid operation and good cleaning effect, does not need a back washing pump or a clean water tank, reduces the floor area of equipment, saves water resources and does not cause environmental pollution.
Description
Technical Field
The invention relates to the technical field of water purification, in particular to the technical field of inorganic ceramic membrane material water purification, and specifically relates to a purification method of a flat ceramic membrane water purifier.
Background
Swimming is a comprehensive body-building exercise and is favored by people. When swimming, the human skin is directly contacted with the water in the swimming pool, so the quality of the water quality of the swimming pool directly influences the health of swimming people. During the swimming pool process, a large amount of pollutants such as secretions, sweat and hair on the epidermis of a human body can be dispersed in water. The pollutants contain a large amount of bacteria and various pathogenic bacteria, which can cause serious harm to cross infection of swimmers, so that the swimming pool water needs to be filtered and disinfected timely.
At present, a multi-medium sand pressure filter is generally adopted by a domestic and foreign swimming pool water circulation purification system, wherein the sand filter tank is the most commonly used one. The filter mainly has the following problems in the operation process: the adsorption capacity of the filter material is limited, and particularly after the filter material adsorbs greasy substances secreted by a human body, the effect of adsorbing suspended matter particles is lost quickly, and the filter material cannot be regenerated, so that the filtering function of part of the filter material is lost; the filter material exceeding the service life is abraded and thinned under the impact of water flow, so that the secondary pollution of the water in the swimming pool is caused; the filter material intercepts various impurities and adsorbs various suspended substances and oily substances, and is easy to agglomerate, and the filter material can be lost during backflushing, so that the filtering function is lost; the particle size of the filter material is distributed in the micron and millimeter level, so that the filter material can only intercept macroscopic large particles such as hair, cortex metabolites and the like, can not intercept bacteria, and can not ensure that the water after circulating purification achieves the sterile effect; finally, the multi-medium sandstone filter needs frequent back washing, the back washing time is long, the water quantity requirement is large, and a large amount of water resource waste and secondary environmental pollution are caused by the back-washed water.
The sand filtration tank cannot effectively intercept pathogenic microorganisms such as bacteria due to large aperture, and needs to be disinfected by adding chlorine-containing chemical agents. The residual chlorine content of the swimming pool water of the disinfection process is high, which can cause skin itch; the strong hypochlorous acid smell is dispersed in the indoor swimming pool space, so that the symptoms of dyspnea, dizziness, sore throat and the like are caused.
Disclosure of Invention
The invention aims to solve a series of problems of low filtering precision, frequent back washing, large quantity of back washing water, secondary pollution caused by the back washing water, large quantity of chlorine-containing chemicals for disinfection, skin pruritus during swimming, bad smell of the chlorine-containing chemicals and the like in the processes of filtering a sand filter tank, disinfecting the chlorine-containing chemicals and the like adopted by a swimming pool water circulation purification system. The water purifier and the water purification method have the advantages of high automation degree, integration of turbidity removal and sterilization, no need of back washing, high filtering precision, large water outlet flux, small occupied area and simple operation, and can meet the requirements of various swimming pools and SPA places.
The invention aims to solve the problems that: the existing swimming pool water circulation purification system adopts a sand filter tank filtering process, and the process has low filtering precision and poor effluent quality; the water consumption for back washing is large, which causes the problems of water resource waste, secondary environmental pollution and the like, and provides a filtering system integrating ozone, flat ceramic membrane at ultrafiltration level and ultrasonic wave. The ozone pre-oxidation effect inactivates bacteria in the swimming pool water, and can effectively relieve the membrane fouling and blocking problem; the ultrafiltration membrane has high filtration precision, good effluent quality and low turbidity, and can intercept pathogenic bacteria such as various bacteria and the like; the flat plate type membrane adopts a negative pressure suction filtration mode, so that the energy consumption is low, the effective utilization rate of the membrane is high, and the loading density of the membrane is high; the ceramic film has high mechanical strength, acid and alkali resistance, high temperature resistance, microbial corrosion resistance, good hydrophilicity, good pollution resistance and long service life; the ultrasonic wave can efficiently clean the filter cake layer adhered to the surface of the membrane in a short time, and the membrane does not need back washing, wastes no water resource and produces no secondary pollution. Most importantly, the effluent quality of the system reaches the aseptic level, chlorine-containing chemicals are not required to be added for sterilization and disinfection, and poor body feeling and uncomfortable smell cannot be caused to swimming people.
In order to solve the technical problems in the swimming pool water circulation purification system, the technical scheme of the invention is as follows:
the purification method of the flat ceramic membrane water purifier is characterized by comprising the following purification processes:
step one, ozone pre-oxidation: the electromagnetic valve of the water inlet pipeline and the ozone generator are opened, the water to be treated and ozone are mixed in the pipeline mixer, and the ozone carries out contact preoxidation sterilization disinfection treatment on the water of the swimming pool;
step two, filtering by a flat ceramic membrane: the water to be treated after ozone disinfection permeates through the flat ceramic membrane for filtration treatment under the action of vacuum suction force generated by the negative pressure suction pump, the purified water after disinfection and filtration is gathered into the membrane water collecting pipe, and the purified water is discharged from the water production pipeline port to the swimming pool for reuse through the driving force generated by the negative pressure suction pump; meanwhile, the hair, cortex metabolites, bacteria and bacterial secretion in the swimming pool are intercepted by the flat ceramic membrane and are continuously concentrated in the membrane pool;
step three, ultrasonic cleaning: with the extension of the filtering time, the pollutants intercepted by the flat ceramic membrane are gradually increased and accumulated on the membrane surface, when the actual water production flux value detected by the electromagnetic flowmeter is lower than 70-30% of the designed water production flux value of the system, the water inlet pipeline electromagnetic valve, the negative pressure suction pump and the water production pipeline electromagnetic valve are closed, the ultrasonic controller is opened, the pollutants on the surface of the flat ceramic membrane are subjected to ultrasonic cleaning through the ultrasonic vibrator arranged below the ceramic membrane, and after the set ultrasonic cleaning time is finished, the system is restarted according to the first step to perform ozone sterilization and membrane filtering treatment;
step four, pollutant discharge: after ultrasonic cleaning, when the actual water flux of the flat ceramic membrane is still 70% -30% lower than the designed value of the water flux of the system, the concentration of the pollutants enriched in the membrane pool is very high, the concentration polarization pollution reaches the irreversible recovery condition, the normal operation of the flat ceramic membrane filtering system is seriously hindered, a water inlet pipeline electromagnetic valve, an ozone generator and a negative pressure suction pump are closed, a concentrated discharge pipeline electromagnetic valve is opened, the concentrated pollutant wastewater in the membrane pool is collected and discharged, and after the pollutant wastewater discharge is detected through a liquid level sensor, the system performs purification treatment on the water to be treated according to the repeated cycle of the first step, the second step and the third step.
In the application, all parts are automatically controlled by an automatic control system, and intelligent operation is realized.
Preferably, the method for purifying a flat ceramic membrane water purifier is characterized by comprising the following steps: the dosage of the ozone generated by the ozone generator is 1 mg/L-1 g/L; the ozone amount is selected according to the difference of the number of bacterial colonies in the water quality of inlet water, and the general ozone concentration range is 1-100 mg/L.
Preferably, the method for purifying a flat ceramic membrane water purifier is characterized by comprising the following steps: the flat ceramic membrane support, the transition layer and the membrane layer are made of one or more composite materials of alumina, zirconia, titania, silica, silicon carbide, cordierite, mullite and porcelain powder.
Preferably, the method for purifying a flat ceramic membrane water purifier is characterized by comprising the following steps: the distribution range of the pore diameter of the flat ceramic membrane is 0.01-0.5 mu m.
Preferably, the method for purifying a flat ceramic membrane water purifier is characterized by comprising the following steps: the ultrasonic cleaning operation is based on the fact that when the actual water production flux value detected by the electromagnetic flowmeter is lower than 50% -30% of the designed water production flux value of the system, the flat ceramic membrane is judged to need to be subjected to ultrasonic cleaning treatment.
Preferably, the method for purifying a flat ceramic membrane water purifier is characterized by comprising the following steps: the ultrasonic cleaning frequency is 25-80 KHz, and the ultrasonic cleaning time is 0.5-120 min.
Preferably, the method for purifying a flat ceramic membrane water purifier is characterized by comprising the following steps: and when the discharge of concentrated pollutants in the membrane pool is determined according to whether the actual water production flux of the membrane after ultrasonic cleaning is lower than 50-30% of the design value of the water production flux of the system, the concentrated solution is judged to need to be discharged and treated.
Preferably, the method for purifying a flat ceramic membrane water purifier is characterized by comprising the following steps: the water to be treated refers to swimming pool water, water in an SPA place, car washing wastewater, rainwater, drinking water purification and all occasions capable of replacing a multi-medium sand rate tank.
The technical scheme of the purification method of the flat ceramic membrane water purifier has the following beneficial effects:
1. the support body, the transition layer and the film layer of the flat ceramic film are made of inorganic ceramics, such as one or more composite materials of alumina, zirconia, titania, silica, silicon carbide, cordierite, mullite and ceramic powder, and the materials can generate hydrogen bond action with water molecules and have particularly good hydrophilicity, so that the flat ceramic film has good pollution resistance.
2. The ozone-involved water purification and filtration system aims to sterilize and disinfect, remove odor in water, efficiently degrade new micro-pollutant Endocrine Disruptors (EDCs) and medicines and personal care products (PPcPs), relieve membrane pollution pressure, prolong membrane operation time, reduce ultrasonic cleaning frequency, improve membrane filtration efficiency and prolong membrane service life.
3. The membrane pollution treatment method adopts an ultrasonic cleaning technology, has good cleaning effect, does not need backwashing, a backwashing pump and a clean water tank, reduces the floor area of equipment, and does not cause secondary pollution caused by the discharge of a large amount of backwashing water.
4. The membrane element adopts an inorganic flat ceramic membrane, and has the advantages of large permeation flux, high mechanical strength, acid and alkali resistance, high temperature resistance, microbial corrosion resistance and good aperture concentration; the most important characteristic is that the ozone oxidation is resistant, the ozone oxidation technology can be integrated, the catalyst can be loaded to catalyze ozone to form an ozone nano reactor, hydroxyl free radicals can be generated on the surface of the membrane and in the pore channels of the membrane, pollutants are not selectively degraded, and the removal rate and the inactivation rate of pathogenic microorganisms are improved.
5. The flat ceramic membrane swimming pool water purifier disclosed by the invention is fully automatically controlled, simple to operate, unattended, capable of remotely monitoring large data, performing gridding operation, small in floor area, good in effluent quality, free of chlorine-containing disinfectants and carcinogenic, teratogenic and mutagenic trihaloalkane byproducts, and the effluent quality reaches an aseptic level.
Drawings
FIG. 1 is a schematic structural diagram of a flat ceramic membrane swimming pool water purifier.
Description of reference numerals: a water inlet pipeline electromagnetic valve 1, an ozone generator 2, a pipeline mixer 3, a negative pressure suction pump 4, a flat ceramic membrane 5, a membrane water collecting pipe 6, an electromagnetic flowmeter 7, an ultrasonic controller 8, an ultrasonic vibrator 9, an automatic control system 10, a concentrated discharge pipeline electromagnetic valve 11, a liquid level sensor 12, a water production pipeline electromagnetic valve 13
The specific implementation mode is as follows:
the invention is further illustrated by the following examples, which are not intended to limit the scope of the present disclosure in any way.
Example 1
The treatment apparatus shown in appendix 1, during the purification process, operates as follows:
step one, ozone pre-oxidation: the water inlet pipeline electromagnetic valve 1 and the ozone generator 2 are opened, water to be treated and ozone are mixed in the pipeline mixer 3, and the ozone carries out contact preoxidation sterilization disinfection treatment on the swimming pool water;
step two, filtering by a flat ceramic membrane: the water to be treated after ozone disinfection is filtered by the flat ceramic membrane 5 under the action of vacuum suction force generated by the negative pressure suction pump 4, the purified water after disinfection and filtration is gathered into the membrane water collecting pipe 6 and is discharged from a water production pipe opening by the driving force generated by the negative pressure suction pump 4;
step three, ultrasonic cleaning: with the extension of the filtering time, the pollutants intercepted by the flat ceramic membrane 5 are gradually increased and accumulated on the membrane surface, when the actual water production flux value detected by the electromagnetic flowmeter 7 is lower than 70-30% of the designed value of the water production flux of the system, the water inlet pipeline electromagnetic valve 1, the negative pressure suction pump 4 and the water production pipeline electromagnetic valve 13 are closed, the ultrasonic controller 8 is opened, the pollutants on the surface of the flat ceramic membrane 5 are subjected to ultrasonic cleaning through the ultrasonic vibrator 9 arranged below the ceramic membrane, and after the set ultrasonic cleaning time is finished, the system is restarted according to the first step to perform ozone sterilization and membrane filtering treatment;
step four, pollutant discharge: after ultrasonic cleaning, when the actual water flux of the flat ceramic membrane 5 is still 70% -30% lower than the design value of the water flux of the system, the water inlet pipeline electromagnetic valve 1, the ozone generator 2 and the negative pressure suction pump 4 are closed, the concentrated discharge pipeline electromagnetic valve 11 is opened, concentrated pollutant wastewater in the membrane pool is collected and discharged, after the pollutant wastewater discharge is detected by the liquid level sensor 12, the system performs purification treatment on the water to be treated according to the repeated cycle work of the steps one to three.
All parts are automatically controlled by an automatic control system 10, and intelligent operation is realized.
In the application, taking swimming pool water as an example, a water inlet pipeline electromagnetic valve 1 and an ozone generator 2 are opened, circulating water of the swimming pool and ozone are mixed in a pipeline mixer 3, and the ozone carries out contact preoxidation sterilization disinfection treatment on the swimming pool water; the swimming pool water after ozone disinfection permeates through the flat ceramic membrane 5 to carry out filtration treatment under the vacuum suction effect that negative pressure suction pump 4 produced, and the purified water after disinfection and filtration is gathered in membrane collector pipe 6, discharges from producing water pipe mouth through the drive power that negative pressure suction pump 4 produced and recycles in the swimming pool, carries out product flux, turbidity and bacterial colony total number to the water of flat ceramic membrane swimming pool water purifier output and detects.
Example 2
In the device and operation process as in example 1, in the flat ceramic membrane swimming pool water purifier, during the ozone sterilization and membrane filtration process, the hair, cortex metabolites, bacteria and bacteria secretion in the swimming pool are intercepted by the flat ceramic membrane 5 and are continuously concentrated in the membrane pool; along with the extension of the filtering time, the pollutants intercepted by the flat ceramic membrane 5 are gradually increased and accumulated on the membrane surface, when the actual water production flux value detected by the electromagnetic flowmeter 7 is lower than 50% of the designed value of the water production flux of the system, the water inlet pipeline electromagnetic valve 1, the negative pressure suction pump 4 and the water production pipeline electromagnetic valve 13 are closed, the ultrasonic controller 8 is opened, the pollutants on the surface of the flat ceramic membrane 5 are subjected to ultrasonic cleaning, and after the ultrasonic cleaning is carried out for 5 minutes, the system is restarted according to the first embodiment to carry out ozone sterilization and membrane filtering treatment.
Example 3
After ultrasonic cleaning, when the actual water flux of the flat ceramic membrane is still lower than 50% of the design value of the water flux of the system, the concentration of the pollutants enriched in the membrane pool is very high, the concentration polarization pollution reaches the irreversible recovery condition, the normal operation of the flat ceramic membrane 5 filtering system is seriously hindered, the water inlet pipeline electromagnetic valve 1, the ozone generator 2 and the negative pressure suction pump 4 are closed, the concentration discharge pipeline electromagnetic valve 11 is opened, the concentrated pollutant wastewater in the membrane pool is collected and discharged, and after the pollutant wastewater discharge is detected by the liquid level sensor 12, the system repeatedly and circularly works according to the embodiment 1 and the embodiment 2 to purify the swimming pool water.
Example 4
The swimming pool water of private people in Zhejiang is purified according to the embodiments 1 to 3, the aperture of the silicon carbide flat ceramic membrane is 0.1 mu m, and the water yield is 0.8t/m2h, ultrasonic cleaning frequency is about 1 time/2 h, membrane pool concentration ratio is 250:1, turbidity is 0.1NTU, and total number of colonies is 0.
Example 5
Purifying swimming pool water of private people in Zhejiang according to examples 1 to 3, wherein the aperture of the alumina plate ceramic membrane is 0.1 μm, and the water flux is 0.3t/m2h, ultrasonic cleaning frequency is about 1 time/2.5 h, membrane pool concentration ratio is 280:1, turbidity is 0.1NTU, and total number of colonies is 0.
Example 6
Purifying water in landscape pool of some enterprises in Zhejiang according to examples 1 to 3, wherein the aperture of the silicon carbide flat ceramic membrane is 0.1 μm, and the water yield is 0.7t/m2h, the ultrasonic cleaning frequency is about 1 time/1.5 h, the membrane pool concentration ratio is 220:1, the turbidity is 0.2NTU, and the total number of colonies is 0.
Example 7
Purifying water in landscape pool of some enterprises in Zhejiang according to examples 1 to 3, wherein the aperture of the alumina plate ceramic membrane is 0.1 μm, and the water flux is 0.25t/m2h, ultrasonic cleaning frequency is about 1 time/1.8 h, membrane pool concentration ratio is 240:1 turbidity is 0.1NTU, total number of bacterial colonies isAnd 0 pieces of the Chinese herbal medicines.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims.
Claims (8)
1. A purification method of a flat ceramic membrane water purifier is characterized by comprising the following steps: the purification method comprises the following steps:
step one, ozone pre-oxidation: a water inlet pipeline electromagnetic valve (1) and an ozone generator (2) are opened, water to be treated and ozone are mixed in a pipeline mixer (3), and the ozone carries out contact preoxidation sterilization disinfection treatment on the water of the swimming pool;
step two, filtering by a flat ceramic membrane: the water to be treated after ozone disinfection is filtered by a flat ceramic membrane (5) under the action of vacuum suction force generated by a negative pressure suction pump (4), the disinfected and filtered purified water is gathered into a membrane water collecting pipe (6), and is discharged from a water production pipe opening through the driving force generated by the negative pressure suction pump (4);
step three, ultrasonic cleaning: along with the extension of the filtering time, the pollutants intercepted by the flat ceramic membrane (5) are gradually increased and accumulated on the membrane surface, when the actual water production flux value detected by the electromagnetic flow meter (7) is lower than 70-30% of the designed water production flux value of the system, the water inlet pipeline electromagnetic valve (1), the negative pressure suction pump (4) and the water production pipeline electromagnetic valve (13) are closed, the ultrasonic controller (8) is opened, the pollutants on the surface of the flat ceramic membrane (5) are subjected to ultrasonic cleaning through the ultrasonic vibrator (9) arranged below the ceramic membrane, and after the set ultrasonic cleaning time is finished, the system is restarted according to the first step to perform ozone sterilization and membrane filtering treatment;
step four, pollutant discharge: after ultrasonic cleaning, when the actual water flux of the flat ceramic membrane (5) is still 70% -30% lower than the design value of the water flux of the system, the water inlet pipeline electromagnetic valve (1), the ozone generator (2) and the negative pressure suction pump (4) are closed, the concentrated discharge pipeline electromagnetic valve (11) is opened, the concentrated pollutant wastewater in the membrane pool is collected and discharged, after the pollutant wastewater discharge is detected through the liquid level sensor (12), the system performs purification treatment on the water to be treated according to the repeated cycle work of the first step to the third step.
2. The method according to claim 1, wherein the method comprises the steps of: the dosage of the ozone generated by the ozone generator is 1 mg/L-1 g/L.
3. The method according to claim 1, wherein the method comprises the steps of: the flat ceramic membrane (5) consists of a support body, a transition layer and a membrane layer, and the material of the support body, the transition layer and the membrane layer is one or more composite materials of alumina, zirconia, titania, silica, silicon carbide, cordierite, mullite and porcelain powder.
4. The method according to claim 1, wherein the method comprises the steps of: the pore size distribution range of the flat ceramic membrane (5) is 0.01-0.5 mu m.
5. The method according to claim 1, wherein the method comprises the steps of: the ultrasonic cleaning operation is based on the fact that when the actual water flux value detected by the electromagnetic flowmeter (7) is lower than 50% -30% of the designed water flux value of the system, the flat ceramic membrane (5) needs to be subjected to ultrasonic cleaning treatment.
6. The method according to claim 1, wherein the method comprises the steps of: the ultrasonic cleaning frequency is 25-80 KHz, and the ultrasonic cleaning time is 0.5-120 min.
7. The method according to claim 1, wherein the method comprises the steps of: and when the discharge of concentrated pollutants in the membrane pool is determined according to whether the actual water production flux of the membrane after ultrasonic cleaning is lower than 50-30% of the design value of the water production flux of the system, the concentrated solution is judged to need to be discharged and treated.
8. The method according to claim 1, wherein the method comprises the steps of: the water to be treated is swimming pool water, SPA place wastewater, car washing wastewater, rainwater and drinking water.
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| CN111661983A (en) * | 2020-06-16 | 2020-09-15 | 南京霄祥工程技术有限公司 | Municipal wastewater treatment method and system |
| CN111939768A (en) * | 2020-09-01 | 2020-11-17 | 侯梦斌 | Floating water taking equipment and process |
| CN117228902A (en) * | 2023-11-13 | 2023-12-15 | 四川坤宇沃达智能科技有限公司 | Underground coal mine water treatment system |
| CN117228902B (en) * | 2023-11-13 | 2024-01-26 | 四川坤宇沃达智能科技有限公司 | Underground coal mine water treatment system |
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Application publication date: 20200117 |