CN112759116A - Contain FEP waste water recovery processing system - Google Patents
Contain FEP waste water recovery processing system Download PDFInfo
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- CN112759116A CN112759116A CN202011496280.1A CN202011496280A CN112759116A CN 112759116 A CN112759116 A CN 112759116A CN 202011496280 A CN202011496280 A CN 202011496280A CN 112759116 A CN112759116 A CN 112759116A
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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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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
-
- 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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2201/002—Construction details of the apparatus
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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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
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- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The application relates to a FEP-containing wastewater recovery treatment system, which relates to the technical field of wastewater treatment and comprises a raw water tank, a high-efficiency deslagging device, an integrated clarification tank, a high-efficiency filter, a hollow fiber curtain type membrane tank, a micro-filter, a nanofiltration device and a reuse water tank; raw water is pumped into to high-efficient dross removal mechanism through the immersible pump in the raw water pond, and the water after high-efficient dross removal mechanism handles flows into to integration depositing reservoir intercommunication through the pipeline, is provided with charge device on the pipeline of high-efficient dross removal mechanism and integration depositing reservoir intercommunication, and charge device adds substances such as PAC coagulant, PAM coagulant aid and lime to the aquatic, and the clarified water in the integration depositing reservoir flows into in the retrieval and utilization pond after high efficiency filter, hollow fiber curtain formula membrane cisterna, microfilter and nanofiltration unit are handled in proper order. The method has the advantages that the waste water generated in the FEP production process is recycled, and the purposes of energy conservation, emission reduction and environmental protection are achieved.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to a recovery treatment system for waste water containing FEP.
Background
Industrial water has the characteristics of large water consumption, low water consumption rate, large wastewater discharge amount, strong drainage pollution and the like, and because domestic and industrial wastewater treatment is lacked, most of water is not fully utilized, so that the industrial and domestic sewage is necessary to be recycled. With the development of social economy, the demand of water resources is continuously increased, and sewage backwater becomes a second important water resource in the future. The sewage reuse has the characteristics of technical feasibility, economic rationality, practical applicability and the like, and plays an important role in relieving water resource shortage.
The fluorine-containing material has excellent comprehensive properties of high-temperature resistance, aging resistance, chemical corrosion resistance and the like, and is one of new material varieties which are mainly developed in China. FEP is a class of fluorine-containing copolymers that was earlier introduced after PTFE, is a melt-processible perfluororesin, and is a copolymer of tetrafluoroethylene and hexafluoropropylene. FEP improves the processability of the crude fluorine resin, simultaneously maintains the performance of PTFE, is a synthetic material with excellent comprehensive performance, and is mainly applied to the fields of communication cables, electric wires, semiconductors, chemical corrosion prevention, medical materials, automobiles and the like. In the process of producing FEP, a large amount of wastewater is generated, and the treatment of the wastewater becomes a problem to be solved urgently.
Disclosure of Invention
In order to recycle waste water generated in the FEP production process, the application provides a waste water recycling treatment system containing FEP.
The utility model provides a contain FEP waste water recovery processing system adopts following technical scheme:
a FEP-containing wastewater recovery treatment system comprises a raw water pool, a high-efficiency deslagging device, an integrated clarification tank, a high-efficiency filter, a hollow fiber curtain type membrane pool, a micro-filter, a nanofiltration device and a reuse water pool; raw water pond passes through the immersible pump with raw water suction extremely high-efficient dross removal mechanism, water after high-efficient dross removal mechanism handles flows in through the pipeline extremely integrated clarification tank intercommunication, high-efficient dross removal mechanism with be provided with charge device on the pipeline of integrated clarification tank intercommunication, charge device adds substances such as PAC coagulant, PAM coagulant aid and lime to the aquatic, clarified water in the integrated clarification tank passes through in proper order high efficiency filter, hollow fiber curtain formula membrane cisterna, micro-filter and nanofiltration device flow into to the reuse water pond after handling.
Through adopting above-mentioned technical scheme, FEP waste water is through high-efficient dross removal mechanism, strike off and float in the FEP material on surface and get into integration depositing reservoir, add medicine flocculation and precipitation and adjust waste water PH, fine granule of high efficiency filter filtering and suspended solid etc, waste water gets into enhancement mode hollow fiber curtain formula membrane pond, the membrane pond adopts the hollow fiber reinforced membrane technique to intercept the macromolecule granule in the waste water, product water after filtering through the membrane passes through entering nanofiltration device behind the micro filter filtering micromolecule granule, product water recycle after the nanofiltration treatment, reach energy saving and emission reduction, the purpose of environmental protection.
Preferably, an intermediate water tank is arranged between the integrated clarification tank and the high-efficiency filter, the intermediate water tank is communicated with the integrated clarification tank and the high-efficiency filter, clarified water in the integrated clarification tank flows into the intermediate water tank, and water in the intermediate water tank is pumped into the high-efficiency filter through an intermediate water pump for filtering treatment.
Through adopting above-mentioned technical scheme, after adding middle water tank, the clarified water in the integration clarification tank is discharged in the middle water tank, carries out filtration treatment through middle water pump with the water suction in the middle water tank to high efficiency filter, has improved high efficiency filter's filter effect.
Preferably, a clean water tank is arranged between the hollow fiber curtain type membrane tank and the micro filter, the clean water tank is communicated with the hollow fiber curtain type membrane tank and the micro filter, the filtered water of the hollow fiber curtain type membrane tank flows into the clean water tank, the water in the clean water tank is pumped into the micro filter through a nanofiltration water supply pump for filtering treatment, and the water in the clean water tank is pumped into the hollow fiber curtain type membrane tank through a backwashing pump for backwashing the membranes in the hollow fiber curtain type membrane tank.
By adopting the technical scheme, after the clean water tank is added, water after the hollow fiber curtain type membrane tank is filtered is discharged into the clean water tank for storage, the nanofiltration water supply pump pumps water in the clean water tank into the microfilter for filtering, so that subsequent water treatment is facilitated, and the water in the clean water tank is pumped into the hollow fiber curtain type membrane tank by the backwashing pump for backwashing, so that reasonable utilization of water resources is realized, and normal work of the hollow fiber curtain type membrane tank is ensured.
Preferably, the hollow fiber curtain membrane pool is provided with an air blower, and the air blower blows air into the hollow fiber curtain membrane pool.
Through adopting above-mentioned technical scheme, the air-blower accelerates the washing to hollow fiber curtain formula membrane pond, blows off the dirt on hollow fiber curtain formula membrane pond inner membrane surface through the air-blower, cooperates the water that the backwash pump extracted, carries out the backwash to membrane in the hollow fiber curtain formula membrane pond, clears away the dirt on membrane surface, guarantees the normal drainage function and the drainage efficiency of hollow fiber curtain formula membrane pond.
Preferably, water in the clean water tank is pumped into the nanofiltration device through the nanofiltration water supply pump, and the nanofiltration device is provided with a cleaning device for periodically cleaning the nanofiltration membrane in the nanofiltration device.
By adopting the technical scheme, the cleaning equipment cleans the nanofiltration membrane in the nanofiltration device, and the nanofiltration device is washed by matching with tap water, so that the normal water filtering function and water filtering efficiency of the nanofiltration device are ensured.
Preferably, backwash water in the hollow fiber curtain membrane tank and concentrate water discharged from the nanofiltration device are returned to the intermediate water tank.
By adopting the technical scheme, the backwashing water in the hollow fiber curtain type membrane pool and the concentrated water of the nanofiltration device flow back to the intermediate water tank, the water in the intermediate water tank is subjected to subsequent treatment, and the recovery utilization rate of the water is improved.
Preferably, the water in the clean water tank is used for backwashing the high-efficiency filter, and the backwashing water of the high-efficiency filter is discharged into the raw water tank.
By adopting the technical scheme, the water filtered by the high-efficiency filter in the last step is used for backwashing the high-efficiency filter, so that the utilization rate of the treated water is improved. The backwashing water is discharged into the raw water pool to treat the raw water, so that the recovery utilization rate of the water is improved.
Preferably, high-efficient dross removal mechanism includes force (forcing) pump, pressure dissolve gas pitcher, air supporting pond and scrapes the sediment machine, the force (forcing) pump extraction raw water extremely the pressure is dissolved and is handled in the gas pitcher, pressure dissolve the gas pitcher with water discharge extremely in the air supporting pond, it fixes to scrape the sediment machine directly over the air supporting pond, scrape the sediment machine and scrape and get the solid large granule on the air supporting pond water face and collect.
Through adopting above-mentioned technical scheme, dissolve the gas water that the gas pitcher produced through pressure, release through quick decompression and produce a large amount of micro bubbles in aqueous, a plurality of bubbles adhere on the good impurity particle surface of aquatic flocculation, form the suspended solid that overall density is less than 1, make its water surface of rising and make solid-liquid separation's a water purification method through buoyancy, to the separation and the getting rid of the fine suspended solid that density is close to water, get rid of FEP powder and aquatic large granule material.
Preferably, the sludge in the integrated clarification tank is discharged into a sewage treatment system through a sludge pump.
By adopting the technical scheme, the sludge in the integrated clarification tank is discharged into a sewage treatment system, so that the waste utilization of the sludge is realized, and the purpose of protecting the environment is achieved.
In summary, the present application includes at least one of the following beneficial technical effects:
FEP wastewater passes through a high-efficiency deslagging device, is scraped to float on the surface of FEP materials and then enters an integrated clarification tank, the FEP materials are added with drugs, flocculated and precipitated, the PH of the wastewater is adjusted, fine particles, suspended matters and the like are filtered by a high-efficiency filter, the wastewater enters an enhanced hollow fiber curtain type membrane tank, macromolecular particles in the wastewater are intercepted by the membrane tank by adopting a hollow fiber enhanced membrane technology, produced water filtered by the membrane enters a nanofiltration device after small molecular particles are filtered by a microfilter, and the produced water is recycled after nanofiltration treatment, so that the quality of the produced water is good, and the purposes of energy conservation, emission reduction and environment;
the water in the clean water tank is pumped into the hollow fiber curtain type membrane tank by the backwashing pump for backwashing, so that the reasonable utilization of water resources is realized, and the normal work of the hollow fiber curtain type membrane tank is ensured;
the backwashing water in the hollow fiber curtain type membrane pool and the concentrated water of the nanofiltration device flow back to the intermediate water tank, and the water in the intermediate water tank is subjected to subsequent filtration treatment, so that the recycling rate of the water is improved.
Drawings
FIG. 1 is a system block diagram of an embodiment of the present application;
FIG. 2 is a schematic structural view of the efficient deslagging apparatus shown in FIG. 1;
fig. 3 is a schematic structural view of the integrated clarifier of fig. 1.
Description of reference numerals: 1. a raw water pool; 2. a submersible pump; 3. a high-efficiency deslagging device; 31. a pressure pump; 32. a pressure dissolved air tank; 33. an air floatation tank; 34. a slag scraper; 4. a dosing device; 5. an integrated clarification tank; 51. a coagulation tank; 52. a flocculation tank; 53. a sedimentation tank; 54. a baffle plate; 55. a runner plate; 56. a sloping plate; 6. an intermediate water tank; 7. an intermediate water pump; 8. a high efficiency filter; 9. a hollow fiber curtain type membrane pool; 10. a clean water tank; 11. a backwash pump; 12. a blower; 13. a nanofiltration water supply pump; 14. a microfilter; 15. a nanofiltration device; 16. a reuse water tank; 17. and (5) cleaning the device.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses an FEP-containing wastewater recycling treatment system. Referring to fig. 1, the FEP-containing wastewater recovery processing system comprises a raw water tank 1, a high-efficiency deslagging device 3, an integrated clarification tank 5, a high-efficiency filter 8, a hollow fiber curtain type membrane tank 9, a micro-filter 14, a nanofiltration device 15 and a reuse water tank 16. The wastewater is discharged into a raw water pool 1, the wastewater is pumped into a high-efficiency deslagging device 3 through a submersible pump 2 placed in the raw water pool 1, FEP materials floating on the water surface are scraped and enter an integrated clarification tank 5, the FEP materials are added with drugs, flocculated and precipitated and the PH of the wastewater is adjusted, the integrated clarification tank 5 is communicated with an intermediate water tank 6 through a pipeline, clarified water in the integrated clarification tank 5 is discharged into the intermediate water tank 6, water in the intermediate water tank 6 is pumped into a high-efficiency filter 8 through an intermediate water pump 7 to filter fine particles, suspended matters and the like, then the wastewater enters a hollow curtain type fiber membrane pool 9, the membrane pool adopts a hollow fiber reinforced membrane technology to intercept macromolecular particles in the wastewater, the hollow fiber curtain type membrane pool 9 is communicated with a clear water pool 10 through a pipeline, produced water after membrane filtration enters the clear water pool 10, water in the clear water pool 10 is pumped into a micro filter 14 through a nanofiltration water supply pump 13, and (4) discharging the wastewater after nanofiltration treatment into a recovery water tank 16, and recycling the wastewater after treatment.
Referring to fig. 1, in order to ensure stable water inflow of the system, the raw water tank 1 is specifically configured as a reinforced concrete structure.
Referring to fig. 1 and 2, the high-efficiency deslagging apparatus 3 is mainly used for separation and removal of fine suspended matters having a density close to that of water. Specifically, the efficient deslagging device 3 comprises a pressure pump 31, a pressure dissolved air tank 32, an air flotation tank 33 and a slag scraper 34. After chemical agents are added into raw water, a pressure pump 31 pumps the wastewater into a pressure dissolved air tank 32 for treatment, the pressure dissolved air tank 32 discharges the wastewater into an air floatation tank 33, dissolved air water generated by the pressure dissolved air tank 32 is released in the water through rapid decompression to generate a large number of micro bubbles, a plurality of bubbles are adhered to the surfaces of flocculated impurity particles in the water to form suspended matters with integral density smaller than 1, the suspended matters are lifted to the water surface through buoyancy to enable solid-liquid separation, a residue scraper 34 is fixed right above the air floatation tank 33, and the residue scraper 34 scrapes large solid particles on the water surface of the air floatation tank 33 and collects the large solid particles. In the embodiment, 95% -98% of particle substances can be effectively removed by adopting the high-efficiency deslagging device 3, and the FEP powder is recycled.
Referring to fig. 1, a dosing device 4 is positioned on a pipeline communicating the high-efficiency deslagging device 3 and the integrated clarification tank 5 and is used for adding agents such as PAC flocculant, PAM coagulant aid, lime and the like into the inlet water. PAC coagulant and PAM coagulant aid coagulate small particle suspended matters into large particle floccule for deposition and removal in a pre-settling tank in the integrated clarification tank 5. The pH of the wastewater is adjusted by the action of lime, and the FEP dispersed emulsion is demulsified to remove hydrogen fluoride and perfluorooctanoic acid. Wherein, the PAC and PAM dosing device 4 adopts a metering pump to dose.
Referring to fig. 3, the integrated clarifier 5 is a device for removing suspended substances in water, reducing turbidity of water, reducing COD, and removing suspended FEP powder by using the principle of chemical-adding coagulation sedimentation. In this embodiment, the integrated clarification tank 5 adopts a unique integrated reaction zone design, the integrated clarification tank 5 is divided into a coagulation tank 51, a flocculation tank 52 and a sedimentation tank 53 which are arranged in sequence through partition plates, and the bottom of the sedimentation tank 53 is lower than the bottoms of the coagulation tank 51 and the flocculation tank 52. The water flows through the coagulation tank 51, the flocculation tank 52 and the sedimentation tank 53 in sequence, enters the flocculation tank 52 from the top of the coagulation tank 51, enters the sedimentation tank 53 from the top of the flocculation tank 52, and is discharged from an overflow weir at the top of the sedimentation tank 53.
Wherein, a baffle 54 is fixedly arranged on one side of the flocculation tank 52 close to the sedimentation tank 53, and the purpose of the baffle 54 is to enable the wastewater and the medicament to be fully coagulated and provide a fixed flow passage entering the sedimentation tank 53. A runner plate 55 is fixedly arranged on one side of the sedimentation tank 53 close to the flocculation tank 52, the top of the runner plate 55 is higher than the flocculation tank 52, and the bottom of the runner plate 55 and the sedimentation tank 53 form a water channel. A plurality of inclined plates 56 which are arranged in sequence are fixed in an area formed by one ends of the flow passage plate 55 and the sedimentation tank 53 which are far away from the flocculation tank 52, so that the sedimentation effect is improved, and the sedimentation speed is higher. The suspended matters in the sedimentation tank 53 sink down into a sludge hopper at the bottom of the tank under the action of gravity, and clear water is discharged from an overflow weir around the upper end of the integrated clarification tank 5 and enters the intermediate water tank 6. The sludge discharge of the system adopts an electric valve to discharge sludge, and the sludge is discharged into a sewage treatment system, so that the purpose of protecting the environment is achieved. The integrated clarification tank 5 is of a rectangular steel structure.
Referring to fig. 3, a mounting plate is fixed on the top of the integrated clarification tank 5, and a stirring motor set is fixedly mounted on the mounting plate. The stirring motor group comprises a first stirring motor positioned in the coagulation tank 51, a second stirring motor positioned in the flocculation tank 52 and a third stirring motor positioned in the sedimentation tank 53. The first agitator motor accelerates the mixing of the chemicals in the coagulation tank 51. Raw water and agents such as PAC, PAM, lime and the like are fully coagulated in a coagulation tank 52 in the integrated clarification tank 5 through stirring, and the sedimentation rate is improved. The third stirring motor is positioned right above the inclined plate 56, so that the diffusion of water flow is accelerated, and the water inlet is conveniently and fully contacted with the inclined plate 56.
Referring to fig. 1, the water produced by the integrated clarifier 5 enters an intermediate water tank 6, and specifically, the intermediate water tank 6 is made of rectangular steel.
Referring to fig. 1, the high efficiency filter 8 filters out fine particles, suspended matters, colloids, organic matters and other impurities brought by raw water, and further removes the suspended matters in the water. The high efficiency filter 8 is an important pretreatment device to meet the water inlet requirement of the hollow fiber curtain type membrane tank 9.
Referring to fig. 1, high efficiency filter 8 produces water that enters reinforced hollow fiber curtain membrane tank 9, in which a hollow fiber curtain membrane device is disposed. The hollow fiber curtain type membrane takes screening as a separation principle, takes pressure as a membrane separation process of a driving force, has the filtering precision of about 0.1um, and can effectively remove particles, colloids, bacteria, heat sources and high molecular organic substances in water. Specifically, the hollow fiber curtain type membrane device is an enhanced polyvinylidene fluoride hollow fiber curtain type membrane device, and the main device consists of a curtain type filter membrane component, a membrane bracket, a corresponding valve, a pipeline and a matched instrument, so that the structure is compact, and the occupied area is small. The enhanced polyvinylidene fluoride hollow fiber curtain type membrane component has the characteristics of ultrahigh strength, good pollution resistance, super-large flux, good interception performance, good cleaning flux recovery, advanced structure and the like. Hollow fiber curtain membrane devices are prior art and not described herein in any greater detail.
Referring to fig. 1, water produced by a hollow fiber curtain type membrane pool 9 enters a clean water pool 10, the water is collected again to balance the water amount, a water supply guarantee is provided for a nanofiltration device 15, and the water in the clean water pool 10 can also be used as backwashing water of the hollow fiber curtain type membrane pool 9 and a high-efficiency filter 8, so that reasonable use of the water is realized, and the utilization rate of the water is improved. In this embodiment, the clean water tank 10 is made of rectangular steel.
Referring to fig. 1, a backwash pump 11 is installed between a clean water tank 10 and a hollow fiber curtain membrane tank 9, and the backwash pump 11 pumps water in the clean water tank 10 to the hollow fiber curtain membrane tank 9 to backwash the membranes. The hollow fiber curtain type membrane pool 9 is provided with a blower 12, and the blower 12 provides air cleaning for the hollow fiber membrane stack in the hollow fiber curtain type membrane pool 9. And (3) allowing air to pass through the water inlet side surface of the hollow fiber filtering membrane filaments, and loosening and washing away pollutants formed on the outer surface of the membrane in the filtering process through the mixed oscillation action of the air and water. The ratio of the total aeration quantity of the two parts to the total water yield of the membrane bioreactor is called as the gas-water ratio. The outlet of the blower 12 is connected with the inner aeration main pipe and the outer aeration pipe of the hollow fiber curtain type membrane stack.
Referring to fig. 1, the micro-filter 14 further filters impurities such as fine particles, suspended matters and the like from the hollow fiber curtain type membrane tank 9, so as to achieve the purpose of micro-filtration and meet the water inlet requirement of nano-filtration. The microfilter 14 has high precision, uniform filter element aperture, small filtration resistance, large flux, strong dirt intercepting capability and long service life.
Referring to fig. 1, the nanofiltration device 15 is the most important operation device in the water treatment system, and the nanofiltration membrane belongs to the organic polymer nanotechnology, and the aperture range of the nanofiltration membrane is 1.0-3.0 nm. Specifically, the nanofiltration membrane is a polyamide composite membrane. The nanofiltration device 15 removes most of the soluble salts, colloids, organic substances and microorganisms in the water by using the characteristics of the nanofiltration membrane. The pretreated qualified raw water enters the nanofiltration device 15, and water molecules pass through the membrane layer, are collected by the collection pipeline, and then are introduced into the water production pipe to be injected into subsequent equipment. On the contrary, the water which can not pass through the nano-filtration device is collected by another group of collecting pipelines and then led to a concentrated water discharging pipe to be discharged out of the nano-filtration device 15. The water inlet, water production and concentrate pipes of the nanofiltration device 15 are provided with a series of control valves, monitoring instruments and program control operating systems, which ensure the systematic operation of the equipment with long-term quality guarantee and quantity guarantee.
In the embodiment, the nanofiltration membrane components are membrane components of the composite reverse osmosis membrane, have large element area and high water yield, are ideal membrane components for removing organic matters in surface water and underground water and partially softening the organic matters so as to achieve water hardness with specific requirements.
Referring to fig. 1, the cleaning device 17 is used for preparing a specific cleaning solution with a certain concentration according to the operation pollution condition of the nanofiltration membrane, and removing pollutants in the nanofiltration membrane so as to recover the original characteristics of the nanofiltration membrane. In this embodiment, the cleaning device 17 includes a 5 μm cleaning cartridge filter, a cleaning pump, and the like, and is used to clean the nanofiltration membrane in the nanofiltration device 15.
Referring to fig. 1, the reuse water tank 16 stores nanofiltration effluent, and the reuse water tank 16 is of a rectangular steel structure.
In this embodiment, a touch PLC control system is adopted, and the touch screen functions as a human-computer interaction interface in terms of monitoring the operating state of the system. The water pump is protected by low pressure, high pressure and liquid level control when in operation, so as to prevent the water pump from idling without water. The nanofiltration device 15 automatically washes at regular time and low pressure and large flow rate when the system is running so as to prevent the dirt generated on the surface of the nanofiltration membrane from depositing on the surface of the membrane during running. When the equipment has abnormal conditions and hidden dangers, the equipment is automatically stopped, and the hidden dangers are eliminated and automatically started; therefore, the damage to equipment is greatly reduced, and the running cost is reduced.
The application embodiment a contain FEP waste water recovery processing system's implementation principle does:
FEP waste water is through high-efficient dross removal mechanism 3, strike off and float in entering integration depositing reservoir 5 behind the FEP material on surface, add medicine flocculation and precipitation and adjust waste water PH, 8 filtering tiny particles of high efficiency filter and suspended solid etc. waste water gets into enhancement mode hollow fiber curtain formula membrane pond 9, the macromolecular granule in the waste water is held back to the membrane pond adoption hollow fiber reinforced membrane technique, product water after filtering through the membrane gets into clean water basin 10, get into nanofiltration device 15 behind the micro filter 14 filtering small molecule granule, product water recycle after the nanofiltration treatment. The treatment system has high recovery rate, good water quality of produced water and long service life of equipment. Through pretreatment, the water quality of the inlet water of the subsequent hollow fiber curtain type membrane pool 9 and the nanofiltration device 15 is optimized, the water permeability and the water quality of the produced water of the membrane element are improved, and the service life of the membrane element is prolonged. In addition, the backwashing water and the nanofiltration concentrated water of the hollow fiber curtain type membrane can flow back to the intermediate water tank 6 for treatment. Therefore, the recovery rate of the system can be greatly improved to over 90 percent, and the effluent is stable. The treatment system achieves the purposes of energy conservation and emission reduction, and is low in operation cost and convenient to maintain.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A contain FEP waste water recovery processing system which characterized in that: comprises a raw water pool (1), a high-efficiency deslagging device (3), an integrated clarification tank (5), a high-efficiency filter (8), a hollow fiber curtain type membrane pool (9), a micro-filter (14), a nanofiltration device (15) and a reuse water pool (16); raw water pond (1) is through immersible pump (2) with the raw water suction extremely high-efficient dross removal mechanism (3), the water pipe say after high-efficient dross removal mechanism (3) are handled and flow into integration depositing reservoir (5) intercommunication, high-efficient dross removal mechanism (3) with be provided with charge device (4) on the pipeline of integration depositing reservoir (5) intercommunication, charge device (4) add substances such as PAC coagulant, PAM coagulant aid and lime to the aquatic, clarified water in integration depositing reservoir (5) passes through in proper order high efficiency filter (8), hollow fiber curtain formula membrane cisterna (9), microfilter (14) and nanofiltration unit (15) are handled the back and flow into reuse water tank (16).
2. The FEP-containing wastewater recovery treatment system according to claim 1, characterized in that: the integrated clarification tank (5) and the high-efficiency filter (8) are provided with a middle water tank (6) therebetween, the middle water tank (6) is communicated with the integrated clarification tank (5) and the high-efficiency filter (8), clarified water in the integrated clarification tank (5) flows into the middle water tank (6), and water in the middle water tank (6) is pumped into the high-efficiency filter (8) through a middle water pump (7) for filtration treatment.
3. The FEP-containing wastewater recovery treatment system according to claim 2, characterized in that: a clean water tank (10) is arranged between the hollow fiber curtain type membrane tank (9) and the microfilter (14), the clean water tank (10) is communicated with the hollow fiber curtain type membrane tank (9) and the microfilter (14), filtered water of the hollow fiber curtain type membrane tank (9) flows into the clean water tank (10), water in the clean water tank (10) is pumped into the microfilter (14) through a nanofiltration water supply pump (13) for filtration treatment, and water in the clean water tank (10) is pumped into the hollow fiber curtain type membrane tank (9) through a backwashing pump (11) for backwashing the membranes in the hollow fiber curtain type membrane tank (9).
4. The FEP-containing wastewater recovery treatment system according to claim 3, characterized in that: the hollow fiber curtain type membrane pool (9) is provided with an air blower (12), and the air blower (12) blows air into the hollow fiber curtain type membrane pool (9).
5. The FEP-containing wastewater recovery treatment system according to claim 3 or 4, characterized in that: and water in the clean water tank (10) is pumped into a nanofiltration device (15) through the nanofiltration water supply pump (13), and the nanofiltration device (15) is provided with a cleaning device (17) for periodically cleaning nanofiltration membranes in the nanofiltration device (15).
6. The FEP-containing wastewater recovery treatment system according to claim 5, characterized in that: backwash water in the hollow fiber curtain type membrane pool (9) and concentrated water discharged by the nanofiltration device (15) flow back to the intermediate water tank (6).
7. The FEP-containing wastewater recovery treatment system according to claim 3, characterized in that: and the water in the clean water tank (10) is used for backwashing the high-efficiency filter (8), and the backwashing water of the high-efficiency filter (8) is discharged into the raw water tank (1).
8. The FEP-containing wastewater recovery treatment system according to claim 1, characterized in that: high-efficient dross removal mechanism (3) dissolve gas pitcher (32), air supporting pond (33) and scrape sediment machine (34) including force (forcing) pump (31), pressure, force (forcing) pump (31) extract former water extremely handle in the pressure dissolves gas pitcher (32), pressure dissolves gas pitcher (32) with water discharge extremely in air supporting pond (33), it fixes to scrape sediment machine (34) directly over air supporting pond (33), scrape sediment machine (34) and scrape and get solid large granule on the air supporting pond (33) surface of water and collect.
9. The FEP-containing wastewater recovery treatment system according to claim 1, characterized in that: and the sludge in the integrated clarification tank (5) is discharged into a sewage treatment system through a sludge pump.
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| CN202011496280.1A CN112759116A (en) | 2020-12-17 | 2020-12-17 | Contain FEP waste water recovery processing system |
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