CN117486332B - Low-drug type coagulation-ultrafiltration device and secondary coagulation-ultrafiltration device for coping with high turbidity - Google Patents
Low-drug type coagulation-ultrafiltration device and secondary coagulation-ultrafiltration device for coping with high turbidity Download PDFInfo
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- CN117486332B CN117486332B CN202311575456.6A CN202311575456A CN117486332B CN 117486332 B CN117486332 B CN 117486332B CN 202311575456 A CN202311575456 A CN 202311575456A CN 117486332 B CN117486332 B CN 117486332B
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- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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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Abstract
A low-drug type coagulation-ultrafiltration device and a secondary coagulation-ultrafiltration device for dealing with high turbidity belong to the technical field of water supply treatment. The invention solves the problems of lower water treatment efficiency and incapability of coping with sudden water treatment of high turbidity water in the existing water treatment equipment. The device comprises a low-drug type coagulation-ultrafiltration device, a middle water tank and a second drug adding assembly tank, wherein the second drug adding assembly tank is communicated with the coagulation assembly tank through pipelines, a water inlet and a water outlet of the middle water tank are correspondingly connected to the upper part of an inclined tube sedimentation zone and the upper part of the coagulation assembly tank through a fourth water inlet pipe and a fifth water inlet pipe, and the on-off of the pipelines is controlled through setting valves on the pipelines. The method realizes the adaptive treatment of the high turbidity change of raw water, realizes the high turbidity water treatment in severe weather such as heavy rain and the like by starting an intermediate water tank and adding potassium permanganate to strengthen secondary coagulation, reduces the medicament cost and reduces the occupied area. When the water is in normal water quality conditions such as low turbidity, the water can directly enter the membrane filter assembly tank without passing through the middle water tank.
Description
Technical Field
The invention relates to a low-drug type coagulation-ultrafiltration device and a secondary coagulation-ultrafiltration device for treating high turbidity, belonging to the technical field of water supply treatment.
Background
In recent years, along with the increasing demand of water consumption in China, the number of water works and the water supply amount are increased, but the conventional water supply works often adopt a simple treatment mode of coagulation-precipitation-filtration for the treatment process of conventional surface water (i.e. low turbid water), the removal efficiency of suspended matters is poor, the system structure is complex, the occupied area is large, the time consumption of the construction process is long, and the cost is high.
In addition, conventional feedwater treatment processes often fail to address sudden water quality problems, such as high turbidity water problems caused by heavy rain. In the design of water plants, the design is often based on empirical data, various water demands can be met in the conventional water treatment, and heavy rain brings a large amount of suspended substances including sediment, soil, organic substances and the like into a water supply source, so that the problem of high turbidity of the water supply source of the water supply plant is caused. The problem of difficult treatment process of conventional treatment is caused by the fact that high-turbidity water is not properly treated, and suspended substances block pipelines, sedimentation tanks and membrane systems, so that the water treatment efficiency is reduced. In addition, the suspended substances in the highly turbid water absorb a large amount of pathogenic microorganisms, and improper water treatment can cause human body water source diseases such as diarrhea, dysentery, intestinal infection and the like when the suspended substances are drunk. Therefore, in order to cope with the problem of high turbidity water, it is necessary to modify the conventional treatment process.
When the high turbidity of the water source changes due to storm, the traditional water supply plant often adopts a mode of increasing the dosage in the original water treatment system, and the mode causes the defects of large dosage of coagulant and high medicament cost. However, the conventional system for separately treating high-turbidity water often adopts the treatment measures of primary sedimentation, coagulation, secondary sedimentation and filtration, and adopts a mode of secondary sedimentation to cause the defect of large occupied area. Therefore, the traditional water supply plant can not only increase the cost of the medicament, but also cause the problems of difficult construction and large occupied area by adopting the traditional method for treating the sudden high-turbidity water by adopting the traditional method for treating the high-turbidity water source water plant.
Therefore, there is a need for a water treatment apparatus and a water treatment method that can not only treat conventional surface water with high efficiency, but also can cope with sudden high turbidity water treatment problems by simple modification.
Disclosure of Invention
The invention aims to solve the problems that the water treatment efficiency of the existing water treatment equipment is low and the sudden high turbidity water can not be treated, and further provides a low-drug type coagulation-ultrafiltration device and a secondary coagulation-ultrafiltration device for treating high turbidity.
The technical scheme adopted by the invention for solving the technical problems is as follows:
The low-drug type coagulation-ultrafiltration device comprises a coagulation assembly tank, a contact flocculation assembly tank, a membrane filtration assembly tank, a water outlet tank and a first drug adding assembly tank, wherein the first drug adding assembly tank is communicated with the coagulation assembly tank through a pipeline, a first water inlet pipe is connected to the coagulation assembly tank, a flocculation area and an inclined tube sedimentation area which are communicated are arranged in the contact flocculation assembly tank, the upper part of the flocculation area is communicated with the lower part of the inclined tube sedimentation area, the flocculation area is connected with the coagulation assembly tank through a second water inlet pipe, the membrane filtration assembly tank is connected with the upper part of the inclined tube sedimentation area through a third water inlet pipe, a membrane aeration system is arranged in the membrane filtration assembly tank, a water outlet of the membrane filtration assembly tank is connected to the water outlet tank through a water outlet pipe, and the on-off of the pipeline is controlled through a valve arranged on each pipeline.
Further, the contact flocculation assembly pond comprises a main shell, a baffle and a baffle, wherein the baffle and the baffle are staggered up and down and are fixedly arranged in the main shell in parallel, a channel is formed between the baffle and the baffle, the top end of the channel is communicated with the flocculation zone, and the bottom end of the channel is communicated with the inclined tube sedimentation zone.
Further, a water inlet distributor, gravel and a self-cleaning component for flushing the gravel are arranged in the flocculation area, the water inlet distributor is arranged in the middle of the flocculation area and is communicated with the second water inlet pipe, and a waste water outlet of the self-cleaning component is connected to the coagulation assembly pool through a waste water pipe.
Further, stirring devices are arranged inside the coagulation assembly tank and the first dosing assembly tank respectively, the bottoms of the coagulation assembly tank, the contact flocculation assembly tank, the membrane filtration assembly tank and the water outlet tank are all connected and provided with blow-down pipes, the bottoms of the contact flocculation assembly tank and the membrane filtration assembly tank are also provided with perforated sludge discharge pipes, and the bottoms of the contact flocculation assembly tank and the bottom of the membrane filtration assembly tank are of tapered structures.
The second technical proposal is that the application method of the low-drug type coagulation-ultrafiltration device comprises the following steps:
step one, determining the adding amount of polyaluminium chloride through a small test, adding the polyaluminium chloride with the corresponding adding amount into a first dosing assembly pool, adding the polyaluminium chloride into a coagulation assembly pool after being fully dissolved under the action of a first stirring device, opening a first water inlet valve on a first water inlet pipe, introducing raw water to be treated, and simultaneously opening a third water inlet valve on a third water inlet pipe to form a continuous flow system;
step two, fully and uniformly mixing a polyaluminium chloride coagulant in a coagulation assembly pool, enabling the mixture to flow into the contact flocculation assembly pool through a second water inlet pipe, enabling gravel to serve as a coagulant aid to adsorb and neutralize charges on the surfaces of suspended particles in a flocculation area, flushing pollutants adsorbed on the surfaces of the gravel through a self-cleaning component, enabling the flushed gravel to fall back to a filter layer, enabling flushing wastewater generated by the self-flushing component to flow back into the coagulation assembly pool through a wastewater pipe, enabling water to be treated after being adsorbed in the flocculation area to enter a inclined tube sedimentation area from the upper part of the flocculation area to be precipitated;
And thirdly, enabling the effluent water contacting the flocculation assembly tank to enter the membrane filter assembly tank through a third water inlet pipe, and enabling the effluent water of the membrane filter assembly tank to enter the effluent water tank in a siphon mode.
The technical scheme III is that the secondary coagulation-ultrafiltration device for treating high turbidity comprises the low-drug coagulation-ultrafiltration device, a middle water tank and a second dosing assembly tank in the method 1, wherein the second dosing assembly tank is communicated with the coagulation assembly tank through pipelines, a water inlet and a water outlet of the middle water tank are correspondingly connected to the upper part of an inclined tube sedimentation zone and the upper part of the coagulation assembly tank through a fourth water inlet pipe and a fifth water inlet pipe, and the on-off of the pipelines is controlled through arranging valves on the pipelines.
Further, the contact flocculation assembly pond comprises a main shell, a baffle and a baffle, wherein the baffle and the baffle are staggered up and down and are fixedly arranged in the main shell in parallel, a channel is formed between the baffle and the baffle, the top end of the channel is communicated with the flocculation zone, and the bottom end of the channel is communicated with the inclined tube sedimentation zone.
Further, a water inlet distributor, gravel and a self-cleaning component for flushing the gravel are arranged in the flocculation area, the water inlet distributor is arranged in the middle of the flocculation area and is communicated with the second water inlet pipe, and a waste water outlet of the self-cleaning component is connected to the coagulation assembly pool through a waste water pipe.
Further, the inside agitating unit that sets up respectively of assembly pond that thoughtlessly congeals, first charge assembly pond and second charge assembly pond, the assembly pond that thoughtlessly congeals, contact flocculation assembly pond, membrane are strained the bottom of assembly pond, play water pond and middle pond and are all connected and are provided with the blow down pipe, and contact flocculation assembly pond and membrane are strained the assembly pond bottom and still be provided with perforation mud pipe, and the bottom of contact flocculation assembly pond and the bottom of membrane filtration assembly pond are the convergent structure.
The method for using the secondary coagulation-ultrafiltration device for coping with high turbidity comprises the following steps:
Step one, putting corresponding dosage of polyaluminum chloride into a first dosing assembly tank, and putting corresponding dosage of potassium permanganate reinforced ferric chloride coagulant into a second dosing assembly tank;
Step two, opening a first water inlet valve, passing raw water to be treated, opening a fourth water inlet valve, enabling a coagulation assembly pond, a contact flocculation assembly pond and an intermediate pond to form a circulating system, closing the first water inlet valve when a first batch of water enters the intermediate pond, fully and uniformly mixing a polyaluminium chloride coagulant in the coagulation assembly pond, entering the contact flocculation assembly pond to complete primary flocculation and primary sedimentation, entering the coagulation assembly pond after passing through the intermediate pond, fully and uniformly mixing a potassium permanganate reinforced ferric chloride coagulant in the coagulation assembly pond, and flowing into the contact flocculation assembly pond to complete secondary flocculation and secondary sedimentation;
step three, closing a fourth water inlet valve, opening a third water inlet valve, closing the third water inlet valve when the first batch of treated water in the step two enters the membrane filter assembly pool, opening the fourth water inlet valve, and performing secondary coagulation treatment on the next batch of raw water to be treated;
And step four, after the first batch of effluent enters the membrane filter assembly tank, the first batch of effluent enters the effluent tank in a siphon mode.
Compared with the prior art, the invention has the following effects:
1. Through with flocculation zone with the pipe chute sedimentation zone integration sets up in the contact flocculation assembly pond for entering pipe chute sedimentation zone such as the grit in the flocculation zone is stopped off, and the recycling is to next process, avoids appearing in the direct entering membrane filter assembly pond and produces the destruction to the membrane system, simultaneously, through flocculation zone and the pipe chute sedimentation zone that the integration set up, effectively gathers suspended solid granule, and then effectively improves the removal efficiency of suspended solid, compares with current feedwater treatment facility, and water treatment efficiency is higher.
2. The low-drug coagulation-ultrafiltration device can effectively save the running cost and the running time when aiming at the conventional water supply treatment of non-high-turbidity water source water supply treatment or low-turbidity water source and the like, forms a continuous flow system, has higher hydraulic load, simpler process flow and more convenient running management.
3. The secondary coagulation-ultrafiltration device for treating high turbidity can further aggregate and coagulate suspended solid particles in a secondary coagulation mode to form larger and heavier aggregates, so that the suspended solid removal efficiency is improved.
The device can realize the adaptive treatment of the high turbidity change of raw water, for example, the high turbidity water treatment can be realized by starting an intermediate water tank and adding potassium permanganate to strengthen secondary coagulation in severe weather such as heavy rain, and the occupied area is reduced while the medicament cost is reduced. When the water is in normal water quality conditions such as low turbidity, the water can directly enter the membrane filter assembly tank without passing through the middle water tank, so that the effluent is stable and reaches the standard.
The potassium permanganate reagent is added in the secondary coagulation to reduce the coagulant dosage and simultaneously realize the organic matter treatment of the high turbidity water.
Drawings
FIG. 1 is a schematic structural view of a low-profile coagulation-ultrafiltration device according to a first embodiment;
Fig. 2 is a schematic structural diagram of a secondary coagulation-ultrafiltration device for handling high turbidity according to a second embodiment.
In the figure, the device comprises an A coagulation assembly tank, a B contact flocculation assembly tank, a C flocculation area, a D inclined tube sedimentation area, an E middle water tank, a F first dosing assembly tank, a G second dosing assembly tank, a H membrane filtration assembly tank, a I water outlet tank;
101. The device comprises a main shell, 102, a baffle plate, 103, a partition plate, 32, an aeration device, 33, a hollow fiber membrane assembly, 5, a dosing pump, 2, a first water inlet valve, 25, a third water inlet valve, 29, a second air pump, 30, a second air valve, 31, a second air flowmeter, 34, a liquid flowmeter, 35, an exhaust valve, 8, a water inlet distributor, 13, gravel, 14, a gas stripping sand conveying pipe, 16, a sand filtering cleaning pipe, 15, a wastewater output device, 12, a gas distribution pipe, 9, a first air pump, 10, a first air valve, 11, a first air flowmeter, 3, a stirring device, 19, a perforated sludge discharge pipe, 23 and a fourth water inlet valve.
Detailed Description
The first medicine adding assembly pool F is communicated with the coagulation assembly pool A through a pipeline, a first water inlet pipe is connected to the coagulation assembly pool A, a flocculation area C and an inclined pipe sedimentation area D which are communicated are arranged in the contact flocculation assembly pool B, the upper part of the flocculation area C is communicated with the lower part of the inclined pipe sedimentation area D, the flocculation area C is connected with the coagulation assembly pool A through a second water inlet pipe, the membrane filtration assembly pool H is connected with the upper part of the inclined pipe sedimentation area D through a third water inlet pipe, a membrane aeration system is arranged in the membrane filtration assembly pool H, a water outlet of the membrane filtration assembly pool H is connected to the water outlet pool I through a water outlet pipe, and the on-off of the pipeline is controlled through a valve arranged on each pipeline.
The first dosing assembly pool F is a polyaluminum chloride coagulation dosing assembly pool. And a dosing pump 5 is arranged on a connecting pipeline between the first dosing assembly pool F and the coagulation assembly pool A, so that the dosing pump is convenient for dosing the medicament into the coagulation assembly pool A.
Through will flocculation zone C with the pipe chute sedimentation zone D integration sets up in the contact flocculation assembly pond B for gravel 13 etc. in the flocculation zone C gets into pipe chute sedimentation zone D and stops, and the recycling is to next process, avoids appearing in gravel 13 directly gets into membrane filter assembly pond H and produces the destruction to the membrane system, simultaneously, through flocculation zone C and pipe chute sedimentation zone D that the integration set up, effectively gathers suspended solid granule, and then effectively improves the removal efficiency of suspended solid, compares with current surface water treatment facilities, and water treatment efficiency is higher.
The low-drug coagulation-ultrafiltration device can effectively save the running cost and the running time when aiming at the conventional water supply treatment such as the water supply treatment of non-high-turbidity water sources or the water supply treatment of low-turbidity water sources.
According to the low-drug type coagulation-ultrafiltration device, the first water inlet pipe, the second water inlet pipe, the third water inlet pipe and the water outlet pipe are opened, so that the whole device forms a continuous flow system, the hydraulic load is higher, the process flow is simpler, and the operation management is more convenient.
The pipelines are made of polyethylene.
The first water inlet valve 2 is arranged on the first water inlet pipe, the third water inlet valve 25 is arranged on the third water inlet pipe, and an intelligent regulation and control system is adopted to realize automatic control of the system by controlling the opening and closing of each valve.
The coagulation assembly pool A, the contact flocculation assembly pool B, the membrane filtration assembly pool H, the water outlet pool I and the first dosing assembly pool F are all assembled by adopting assembly equipment, are formed by prefabricating and processing plates, have small occupied area and are convenient, the construction time can be greatly saved when the membrane filtration assembly pool A, the membrane filtration assembly pool H, the water outlet pool I and the first dosing assembly pool F are applied to the construction of a new water plant process, the construction time can be also effectively saved on the basis of the original process when the old water plant is transformed, and the transformation time and cost are effectively saved.
An aeration device 32 and a plurality of hollow fiber membrane components 33 arranged above the aeration device 32 are arranged in the membrane filter assembly pool H, and the aeration device 32 adopts program aeration. So designed, a program aeration is adopted to form uniform micro-bubbles, the membrane module is oxygenated and backwashed, and membrane pollutants adsorbed on the hollow fiber membrane module 33 are backwashed. The hollow fiber membrane module 33 adopts an immersed membrane module, the material adopts polyether cellulose acetate, cellulose acetate or polyamide, the hollow fiber membrane module 33 adopts a low gravity siphon water outlet mode, and continuous water outlet can be realized without independently designing a hydraulic cleaning device and a chemical cleaning device. The structure and the working principle of the aeration device 32 and the hollow fiber membrane module 33 adopted in the present invention are all the prior art, and are not described here again.
The membrane filter assembly pool H is externally connected with a second air pump 29, and a second air valve 30 and a second gas flowmeter 31 are arranged on a connecting pipeline between the second air pump 29 and the aeration device 32. A liquid flowmeter 34 and an exhaust valve 35 are arranged on the water outlet pipe between the membrane filter assembly pool H and the water outlet pool I.
The device can adopt a solar cell integrated power supply system to provide the electric energy required by the system, is green and environment-friendly, and meanwhile, a municipal power supply circuit is additionally arranged as an emergency, so that the problem that equipment cannot normally operate due to insufficient power supply of the solar cell in overcast and rainy weather is avoided.
The contact flocculation assembly tank B comprises a main shell 101, a baffle plate 102 and a baffle plate 103, wherein the baffle plate 103 and the baffle plate 102 are staggered up and down and are fixedly arranged in the main shell 101 in parallel, a channel is formed between the baffle plate 102 and the baffle plate 103, the top end of the channel is communicated with a flocculation area C, and the bottom end of the channel is communicated with an inclined tube sedimentation area D. By arranging the baffle plate 102 and the baffle plate 103, the main casing 101 is partitioned, a flocculation area C is formed between the baffle plate 102 and the main casing 101 on the same side, and an inclined tube sedimentation area D is formed between the baffle plate 103 and the main casing 101 on the same side. The baffle 103 is higher than the baffle 102 to separate the upper part of the flocculation zone C from the upper part of the inclined tube sedimentation zone D, so as to prevent the effluent of the flocculation zone C from directly entering the inclined tube sedimentation zone D through the upper part to influence the sedimentation effect. Through the integrated design of flocculation area C and inclined tube sedimentation zone D, effectively reduce the area who contacts flocculation assembly pond B, simultaneously, form the assembly body, the system equipment of being convenient for is used.
The flocculation area C is internally provided with a water inlet distributor 8, gravel 13 and a self-cleaning component for flushing the gravel 13, wherein the water inlet distributor 8 is arranged in the middle of the flocculation area C and is communicated with a second water inlet pipe, and a wastewater outlet of the self-cleaning component is connected to the coagulation assembly pool A through a wastewater pipe. By the design, water is conveniently distributed into the flocculation area C by arranging the water inlet distributor 8. By providing the grits 13 in the flocculation zone C as coagulant aids to adsorb and neutralize the charge on the surface of the suspended particles, promoting the adsorption bridging between the particles, the interstices between the grits 13 can provide bridging of the particles to one another. When the grit 13 particles are in contact with the suspended particles, the suspended particles may deposit in the interstices between the grit 13 particles and form aggregates. The bridging effect is beneficial to increasing the aggregate size and density of the suspended matters, promoting the sedimentation of the suspended matters and improving the removal efficiency of the suspended matters.
The sand gravel 13 inside the flocculation area C is adsorbed to form dirty sand, and the self-cleaning component is arranged inside the flocculation area C to clean the dirty sand inside the flocculation area C, so that the sand gravel 13 inside the flocculation area C can be recycled, and the running cost of the device is effectively saved. And the cleaning wastewater after the dirty sand is cleaned flows back to the coagulation assembly pool A through the wastewater pipe. The self-cleaning component comprises a gas stripping sand conveying pipe 14, a sand filtering cleaning pipe 16 and a wastewater output device 15, wherein the self-cleaning component adopted in the application is in the prior art, such as a continuous sand flowing filter, so the concrete structure of the self-cleaning component is not repeated, a gas distribution pipe 12 is arranged at the lower part of a flocculation zone C, a first air pump 9 distributes gas into the flocculation zone C through the gas distribution pipe 12, gas-water mixed liquid below the gas stripping sand conveying pipe 14 is sucked into the gas stripping sand conveying pipe 14 under the action of pressure difference between the inside and the outside of the pipe, and the sand 13 is washed under the action of shearing force in the gas stripping sand conveying pipe 14. A first air valve 10 and a first air flow meter 11 are arranged on the connecting pipeline between the first air pump 9 and the air distribution pipe 12. By gas distribution at the lower part of the flocculation zone C, air and water form a gas-water mixed solution in the gas-stripping sand conveying pipe 14, the density of the gas-water mixed solution is far smaller than that of water, so that the gas-water mixed solution is driven to flow from bottom to top through a pipe under the action of pressure difference between the inside and outside of the pipe, low pressure is formed at the lower end of the pipe, surrounding water and sand are sucked into the gas-stripping sand conveying pipe 14, pollutants on the surface of gravel 13 are washed down under the action of high-speed fluid shearing force in the pipe, the gas, the water and the gravel 13 are separated at the outlet at the upper end of the gas-stripping sand conveying pipe 14, the gravel 13 falls back to a filter layer, flushing waste water is collected by a waste water output device 15 and then flows back to a coagulation assembly pool A, and the filter material in the filter layer at the lower part of the flocculation zone C is gradually moved downwards after being continuously sucked, and the filter material in the filter layer can be circularly washed once after a certain time, so that the cost of flushing the gravel 13 is effectively saved.
The inside agitating unit 3 that sets up of coagulation assembly pond A and first charge assembly pond F respectively, coagulation assembly pond A, contact flocculation assembly pond B, membrane filter assembly pond H and play water pond I's bottom all is connected and is provided with the blow down pipe, and contact flocculation assembly pond B and membrane filter assembly pond H bottom still are provided with perforation mud pipe 19, and contact flocculation assembly pond B's bottom and membrane filter assembly pond H's bottom are the convergent structure. By adopting the mechanical stirring device 3, the quick dissolution of the medicament is promoted, the medicament cost is reduced, and the water treatment efficiency is effectively improved. A blow-down valve is provided on each blow-down pipe and on the perforated sludge discharge pipe 19. Through set up perforation mud pipe 19 in contact flocculation assembly pond B and membrane filtration assembly pond H bottom, be convenient for carry out sand row mud operation to contact flocculation assembly pond B's inclined tube sedimentation zone D and membrane filtration assembly pond H. Specifically, the perforated mud pipe 19 in the contact flocculation assembly tank B is used for discharging sludge in the inclined pipe sedimentation zone D and gravel 13 washed away by the flocculation zone C, the leaked gravel 13 can be periodically collected and then put into the flocculation zone C to supplement the quantity of the gravel 13 in the flocculation zone C, and the hollow mud pipe in the membrane filter assembly tank H is used for discharging sludge in the membrane filter assembly tank H. Through setting the bottom of contact flocculation assembly pond B and the bottom of membrane filtration assembly pond H to the convergent structure, make contact flocculation assembly pond B bottom and membrane filtration assembly pond H bottom form great slope, can effectively block mud come-up, make mud can gather in the bottom, realize good precipitation condition, the mud of being convenient for discharges.
The application method of the low-drug type coagulation-ultrafiltration device comprises the following steps:
Step one, determining the adding amount of polyaluminium chloride through a small test, adding the polyaluminium chloride with corresponding adding amount into a first dosing assembly pool F, adding the polyaluminium chloride into a coagulation assembly pool A after the polyaluminium chloride is fully dissolved under the action of a first stirring device 3, opening a first water inlet valve 2 on a first water inlet pipe, introducing raw water to be treated, and simultaneously opening a third water inlet valve 25 on a third water inlet pipe to form a continuous flow system;
Step two, fully and uniformly mixing a polyaluminium chloride coagulant in a coagulation assembly pool A, enabling the mixture to flow into a contact flocculation assembly pool B through a second water inlet pipe, absorbing and neutralizing charges on the surfaces of suspended particles by using gravel 13 as a coagulant aid in a flocculation zone C, flushing pollutants absorbed on the surfaces of the gravel 13 through a self-cleaning component, enabling the flushed gravel 13 to fall back to a filtering layer, enabling flushing wastewater generated by the self-cleaning component to flow back into the coagulation assembly pool A through a waste water pipe, enabling water to be treated after being absorbed through the flocculation zone C to enter an inclined tube sedimentation zone D for sedimentation through the upper part of the flocculation zone C, enabling air distribution in the flocculation zone C through an air distribution pipe 12 by using the gravel 13 as the coagulant aid to absorb and neutralize charges on the surfaces of the suspended particles in the flocculation zone C, and promoting absorption bridging among particles, wherein gaps among the gravel 13 can provide bridging effect of particle interconnection. When the grit 13 particles are in contact with the suspended particles, the suspended particles may deposit in the interstices between the grit 13 particles and form aggregates. The bridging effect is beneficial to increasing the aggregate size and density of the suspended matters, promoting the sedimentation of the suspended matters and improving the removal efficiency of the suspended matters.
The lower part is used for gas distribution, air and water form gas-water mixed liquid in the gas-stripping sand conveying pipe 14, the density of the gas-water mixed liquid is far smaller than that of water, so that the gas-water mixed liquid is driven to flow from bottom to top under the action of pressure difference inside and outside the pipe, low pressure is formed at the lower end of the pipe, surrounding water and sand are sucked into the gas-stripping sand conveying pipe 14, pollutants on the surface of gravel 13 are washed down under the action of high-speed fluid shearing force in the pipe, the gas, the water and the gravel 13 are separated at an outlet at the upper end of the gas-stripping sand conveying pipe 14, the gravel 13 falls back to a filter layer, flushing waste water is collected by a waste water output device 15 and then flows back to a coagulation assembly pool A, and the filter material in the lower part of a flocculation zone C is gradually moved downwards due to the fact that the filter material in the filter layer is circulated and washed once.
And thirdly, enabling the effluent of the contact flocculation assembly tank B to enter a membrane filter assembly tank H through a third water inlet pipe, and enabling the effluent of the membrane filter assembly tank H to enter a water outlet tank I in a siphon mode. The water quality in the water outlet pool I is stable and reaches the standard of sanitary Standard for Drinking Water (GB 5749-2022).
In a second embodiment, a high turbidity secondary coagulation-ultrafiltration device is described by referring to fig. 2, and the device comprises a coagulation assembly tank a, a contact flocculation assembly tank B, a membrane filtration assembly tank H, a water outlet tank I, an intermediate tank E, a first dosing assembly tank F and a second dosing assembly tank G, wherein the first dosing assembly tank F and the second dosing assembly tank G are respectively communicated with the coagulation assembly tank a through pipelines, a first water inlet pipe is connected to the coagulation assembly tank a, a flocculation area C and an inclined tube sedimentation area D which are communicated are arranged in the contact flocculation assembly tank B, the upper part of the flocculation area C is communicated with the lower part of the inclined tube sedimentation area D, the flocculation area C is connected with the coagulation assembly tank a through a second water inlet pipe, the membrane filtration assembly tank H is connected with the upper part of the inclined tube sedimentation area D through a third water inlet pipe, a membrane aeration system is arranged in the membrane filtration assembly tank H, a water outlet of the membrane filtration assembly tank H is connected to the water outlet tank I through a water outlet pipe, a water inlet and a water outlet of the intermediate tank E is correspondingly connected to the upper part of the inclined tube sedimentation area D through a fourth water inlet pipe and a fifth water inlet pipe, and the upper part of the inclined tube sedimentation area D is respectively arranged on the upper part of the coagulation assembly tank through valves.
The first dosing assembly pool F is a polyaluminium chloride coagulation dosing assembly pool, and the second dosing assembly pool G is a potassium permanganate reinforced ferric chloride coagulation dosing assembly pool. And the chemical adding pumps 5 are arranged on the connecting pipelines between the first chemical adding assembly pool F and the second chemical adding assembly pool G and the coagulation assembly pool A, so that the chemical can be conveniently added into the coagulation assembly pool A.
The upper part of the inclined tube sedimentation zone D is provided with an outlet of the inclined tube sedimentation zone D.
Valves are respectively arranged on the first water inlet pipe, the third water inlet pipe, the fourth water inlet pipe and the water outlet pipe to control the on-off of the pipeline. The first water inlet valve 2 is arranged on the first water inlet pipe, the third water inlet valve 25 is arranged on the third water inlet pipe, the fourth water inlet valve 23 is arranged on the fourth water inlet pipe, and the water outlet valve is arranged on the water outlet pipe, so that the automatic control of the system device is realized by controlling the opening and closing of each valve through an intelligent control system.
Through will flocculation zone C with the pipe chute sedimentation zone D integration sets up in the contact flocculation assembly pond B for gravel 13 etc. in the flocculation zone C gets into pipe chute sedimentation zone D and stops, and the recycling is to next process, avoids appearing in gravel 13 directly gets into membrane filter assembly pond H and produces the destruction to the membrane system, simultaneously, through flocculation zone C and pipe chute sedimentation zone D that the integration set up, effectively gathers suspended solid granule, and then effectively improves the removal efficiency of suspended solid, compares with current water supply treatment facilities, and water treatment efficiency is higher.
The opening and closing of the third water inlet valve 25 and the fourth water inlet valve 23 are controlled by the automatic control device to treat the high-turbidity water. The invention can be circularly carried out by adopting two sequencing batch water inlet modes, namely, a first sequencing batch, namely, closing the third water inlet valve 25, opening the first water inlet valve 2 and the fourth water inlet valve 23, closing the first water inlet valve 2 when water enters an intermediate pool E, forming internal circulation through the intermediate pool E, and a second sequencing batch, namely, opening the third water inlet valve 25, closing the first water inlet valve 2 and the fourth water inlet valve 23, and realizing secondary coagulation, secondary flocculation and secondary sedimentation.
By adding a small amount of potassium permanganate to strengthen the coagulation, the degradation and removal of organic matters adsorbed on suspended particles are realized, so that tiny suspended matters are better exposed and interact with a coagulant, surface charges are neutralized, the stability of electrical property is destroyed, the addition amount of the coagulant is reduced, and meanwhile, the treatment and removal of organic matters with high turbidity water are realized, and the total medicine consumption is reduced by 30% compared with the traditional method.
In the prior art, the primary coagulation has limited effect on fine and difficult-to-settle suspended matter particles, and the suspended matter particles can be further aggregated and coagulated in a secondary coagulation mode to form larger and heavier aggregates, so that the removal efficiency of suspended matters is improved.
The device can realize the adaptive treatment of high turbidity change of raw water, for example, in severe weather such as heavy rain, the high turbidity water treatment can be realized by starting the intermediate water tank E and adding potassium permanganate to strengthen secondary coagulation, the medicament cost is reduced, the occupied area is reduced, the finally produced water stably reaches the sanitary standard of domestic drinking water (GB 5749-2022), and when the condition is normal water quality such as low turbidity, the produced water can directly enter the membrane filter assembly tank H without the intermediate water tank E, so that the produced water stably reaches the sanitary standard of domestic drinking water (GB 5749-2022).
The potassium permanganate reagent is added in the secondary coagulation to reduce the coagulant dosage and simultaneously realize the organic matter treatment of the high turbidity water.
The pipelines are made of polyethylene.
The assembly pond A, the assembly pond B is flocculated in the contact, membrane filtration assembly pond H, play water pond I, middle pond E, first charge assembly pond F and second charge assembly pond G all adopt assembly equipment, form through prefabricated processing and processing through the board, area is little and convenient, not only can be applied to the new water factory technology and build the time of saving greatly in putting up, when old water factory reforms transform, can also build on former technology basis, through controlling middle pond E dwell time, realize the secondary and coagulate, compared with traditional technology greatly reduced area, effectively saved transformation time and cost.
An aeration device 32 and a plurality of hollow fiber membrane components 33 arranged above the aeration device 32 are arranged in the membrane filter assembly pool H, and the aeration device 32 adopts program aeration. The membrane aeration device 32 is adopted to obtain higher cross flow speed and lower rising resistance, and has good cleaning effect on the membrane assembly without damaging the membrane assembly. So designed, a program aeration is adopted to form uniform micro-bubbles, the membrane module is oxygenated and backwashed, and membrane pollutants adsorbed on the hollow fiber membrane module 33 are backwashed. The hollow fiber membrane module 33 adopts an immersed membrane module, the material adopts polyether cellulose acetate, cellulose acetate or polyamide, the hollow fiber membrane module 33 adopts a low gravity siphon water outlet mode, and continuous water outlet can be realized without independently designing a hydraulic cleaning device and a chemical cleaning device. The water outlet power consumption is low, the energy consumption is saved, and the requirements of equipment, pipelines and accessories on the water inlet pressure are reduced. The structure and the working principle of the aeration device 32 and the hollow fiber membrane module 33 adopted in the present invention are all the prior art, and are not described here again.
Based on mathematical relations of parameters such as membrane resistance, membrane flux and the like, an intelligent membrane flux pre-judgment aeration assembly type module is formed, and the intelligent membrane flux pre-judgment aeration assembly type module is characterized in that the membrane flux is stable and the effluent quality is stable.
The membrane filter assembly pool H is externally connected with a second air pump 29, and a second air valve 30 and a second gas flowmeter 31 are arranged on a connecting pipeline between the second air pump 29 and the aeration device 32. A liquid flowmeter 34 and an exhaust valve 35 are arranged on the water outlet pipe between the membrane filter assembly pool H and the water outlet pool I.
The processing system can adopt a solar cell integrated power supply system to provide the electric energy required by the system, is green and environment-friendly, and meanwhile, a municipal power supply circuit is additionally arranged as an emergency, so that the problem that equipment cannot normally operate due to insufficient power supply of the solar cell in overcast and rainy weather is avoided.
The contact flocculation assembly tank B comprises a main shell 101, a baffle plate 102 and a baffle plate 103, wherein the baffle plate 103 and the baffle plate 102 are staggered up and down and are fixedly arranged in the main shell 101 in parallel, a channel is formed between the baffle plate 102 and the baffle plate 103, the top end of the channel is communicated with a flocculation area C, and the bottom end of the channel is communicated with an inclined tube sedimentation area D. By arranging the baffle plate 102 and the baffle plate 103, the main casing 101 is partitioned, a flocculation area C is formed between the baffle plate 102 and the main casing 101 on the same side, and an inclined tube sedimentation area D is formed between the baffle plate 103 and the main casing 101 on the same side. The baffle 103 is higher than the baffle 102 to separate the upper part of the flocculation zone C from the upper part of the inclined tube sedimentation zone D, so as to prevent the effluent of the flocculation zone C from directly entering the inclined tube sedimentation zone D through the upper part to influence the sedimentation effect. Through the integrated design of flocculation area C and inclined tube sedimentation zone D, effectively reduce the area who contacts flocculation assembly pond B, simultaneously, form the assembly body, the system equipment of being convenient for is used.
The flocculation area C is internally provided with a water inlet distributor 8, gravel 13 and a self-cleaning component for flushing the gravel 13, wherein the water inlet distributor 8 is arranged in the middle of the flocculation area C and is communicated with a second water inlet pipe, and a wastewater outlet of the self-cleaning component is connected to the coagulation assembly pool A through a wastewater pipe. By the design, water is conveniently distributed into the flocculation area C by arranging the water inlet distributor 8. By providing the grits 13 in the flocculation zone C as coagulant aids to adsorb and neutralize the charge on the surface of the suspended particles, promoting the adsorption bridging between the particles, the interstices between the grits 13 can provide bridging of the particles to one another. When the grit 13 particles are in contact with the suspended particles, the suspended particles may deposit in the interstices between the grit 13 particles and form aggregates. The bridging effect is beneficial to increasing the aggregate size and density of the suspended matters, promoting the sedimentation of the suspended matters and improving the removal efficiency of the suspended matters.
The inside gravel 13 of flocculation zone C adsorbs the back and forms dirty sand, through setting up self-cleaning subassembly in flocculation zone C inside, washs the inside dirty sand of flocculation zone C for the inside gravel 13 of flocculation zone C can cyclic utilization, effectively saves system running cost. And the cleaning wastewater after the dirty sand is cleaned flows back to the coagulation assembly pool A through the wastewater pipe. The self-cleaning component comprises a gas stripping sand conveying pipe 14, a sand filtering cleaning pipe 16 and a wastewater output device 15, and is in the prior art, such as a continuous sand flowing filter, so the specific structure of the self-cleaning component is not repeated in the invention, a gas distribution pipe 12 is arranged at the lower part of a flocculation area C, a first air pump 9 distributes gas into the flocculation area C through the gas distribution pipe 12, a gas-water mixed solution below the gas stripping sand conveying pipe 14 is sucked into the gas stripping sand conveying pipe 14 under the action of pressure difference between the inside and the outside of the pipe, and the sand gravel 13 is washed under the action of shearing force in the gas stripping sand conveying pipe 14. A first air valve 10 and a first air flow meter 11 are arranged on the connecting pipeline between the first air pump 9 and the air distribution pipe 12. By distributing air at the lower part of the flocculation zone C, air and water form air-water mixed liquor in the air-stripping sand conveying pipe 14, the density of the air-water mixed liquor is far smaller than that of water, so that the air-water mixed liquor is driven to flow from bottom to top through a pipe under the action of pressure difference between the inside and outside of the pipe, low pressure is formed at the lower end of the pipe, surrounding water and sand are sucked into the air-stripping sand conveying pipe 14, pollutants on the surface of gravel 13 are washed down under the action of high-speed fluid shearing force in the pipe, the air, the water and the gravel 13 are separated at the outlet at the upper end of the air-stripping sand conveying pipe 14, the gravel 13 falls back to a filter layer, flushing waste water is collected by a waste water output device 15 and then flows back to a coagulation assembly pool A, and the filter material in the filter layer can be gradually moved downwards after a certain time is circulated and washed once. Through setting up the waste pipe, will wash waste water backward flow to coagulating assembly cell A, effectively save artifical sand washing expense.
The inside agitating unit 3 that sets up of coagulation assembly pond A, first charge assembly pond F and second charge assembly pond G respectively, coagulation assembly pond A, contact flocculation assembly pond B, membrane filter assembly pond H, play water pond I and middle pond E's bottom all is connected and is provided with the blow down pipe, contact flocculation assembly pond B and membrane filter assembly pond H bottom still are provided with perforation mud pipe 19, contact flocculation assembly pond B's bottom and membrane filter assembly pond H's bottom are the convergent structure. By adopting the mechanical stirring device 3, the quick dissolution of the medicament is promoted, the medicament cost is reduced, and the water treatment efficiency is effectively improved. A blow-down valve is provided on each blow-down pipe and on the perforated sludge discharge pipe 19. Through set up perforation mud pipe 19 in contact flocculation assembly pond B and membrane filtration assembly pond H bottom, be convenient for carry out sand row mud operation to contact flocculation assembly pond B's inclined tube sedimentation zone D and membrane filtration assembly pond H. Specifically, the perforated mud pipe 19 in the contact flocculation assembly tank B is used for discharging sludge in the inclined pipe sedimentation zone D and gravel 13 washed away by the flocculation zone C, the leaked gravel 13 can be periodically collected and then put into the flocculation zone C to supplement the quantity of the gravel 13 in the flocculation zone C, and the hollow mud pipe in the membrane filter assembly tank H is used for discharging sludge in the membrane filter assembly tank H. Through setting the bottom of contact flocculation assembly pond B and the bottom of membrane filtration assembly pond H to the convergent structure, make contact flocculation assembly pond B bottom and membrane filtration assembly pond H bottom form great slope, can effectively block mud come-up, make mud can gather in the bottom, realize good precipitation condition, the mud of being convenient for discharges.
The application method of the secondary coagulation-ultrafiltration device for coping with high turbidity comprises the following steps:
Step one, putting the corresponding amount of polyaluminum chloride into a first dosing assembly pool F, putting the corresponding amount of potassium permanganate reinforced ferric chloride coagulant into a second dosing assembly pool G, and determining the amount of the polyaluminum chloride and potassium permanganate reinforced ferric chloride coagulant in secondary coagulation through a small test.
Step two, opening a first water inlet valve 2, passing raw water to be treated, opening a fourth water inlet valve 23 to enable a coagulation assembly tank A, a contact flocculation assembly tank B and an intermediate water tank E to form a circulating system, closing the first water inlet valve 2 when a first batch of water enters the intermediate water tank E, fully and uniformly mixing a polyaluminium chloride coagulant in the coagulation assembly tank A, entering the contact flocculation assembly tank B to complete primary flocculation and primary sedimentation, then entering the coagulation assembly tank A after passing through the intermediate water tank E, fully and uniformly mixing a potassium permanganate reinforced ferric chloride coagulant in the coagulation assembly tank A, and then entering the contact flocculation assembly tank B to complete secondary flocculation and secondary sedimentation, wherein in a flocculation zone C, gravel 13 is used as a coagulant aid to adsorb and neutralize charges on the surfaces of suspended particles, so that adsorption bridging among particles is promoted, and gaps among the gravel 13 can provide bridging effect of mutual connection of particles. When the grit 13 particles are in contact with the suspended particles, the suspended particles may deposit in the interstices between the grit 13 particles and form aggregates. The bridging effect is beneficial to increasing the aggregate size and density of the suspended matters, promoting the sedimentation of the suspended matters and improving the removal efficiency of the suspended matters.
The first air pump 9 distributes air to the lower part of the flocculation zone C through an air distribution pipe 12, air and water form an air-water mixed solution in the air stripping sand conveying pipe 14, the density of the air-water mixed solution is far smaller than that of the water, so that the air-water mixed solution is driven to flow from bottom to top through a pipeline under the action of pressure difference between the inside and outside of the pipe, low pressure is formed at the lower end of the pipe, surrounding water and sand are sucked into the air stripping sand conveying pipe 14, pollutants on the surface of gravel 13 are washed down under the action of high-speed fluid shearing force in the pipe, the air, the water and the gravel 13 are separated at the outlet of the upper end of the air stripping sand conveying pipe 14, the gravel 13 falls back to a filtering layer, flushing waste water is collected by a waste water output device 15 and then flows back to a coagulation assembly pool A, and the filtering material in the filtering layer is gradually moved down after the filtering layer is continuously sucked away, and the filtering material in the filtering layer can be circularly washed once after a certain time.
Step three, closing a fourth water inlet valve 23, opening a third water inlet valve 25, closing the third water inlet valve 25 when the first batch of water in the step two enters the membrane filtration assembly pool H, opening the fourth water inlet valve 23, performing secondary coagulation treatment on the next batch of raw water to be treated, judging whether the first batch of water in the step two basically or completely enters the membrane filtration assembly pool H, wherein the first batch of water can be judged by designing a safety system 0.7 according to the size of the contact flocculation assembly pool B in advance, opening the first water inlet valve 2 when the water in the intermediate pool E is emptied after the third water inlet valve 25 is opened, judging that the first batch of water basically enters the membrane filtration assembly pool H when the volume of the water in the contact flocculation assembly pool B is 0.7 times discharged, and the second batch of water can be judged to completely enter the membrane filtration assembly pool H after the fourth water inlet valve 23 is closed in the step three, and judging that the first batch of water enters the membrane filtration assembly pool H after the water in the intermediate pool E is completely discharged to the contact flocculation assembly pool B.
And step four, after the first batch of effluent enters the membrane filter assembly pool H, the first batch of effluent enters the effluent pool I in a siphon mode. The water quality in the water outlet pool I stably reaches the standard of sanitary Standard for Drinking Water (GB 5749-2022).
Claims (3)
1. The application method of the secondary coagulation-ultrafiltration device for coping with high turbidity is characterized by comprising the following steps:
The device comprises a low-drug type coagulation-ultrafiltration device, an intermediate water tank (E) and a second drug adding assembly tank (G), wherein the low-drug type coagulation-ultrafiltration device comprises a coagulation assembly tank (A), a contact flocculation assembly tank (B), a membrane filtration assembly tank (H), a water outlet tank (I) and a first drug adding assembly tank (F), wherein the first drug adding assembly tank (F) is communicated with the coagulation assembly tank (A) through a pipeline, a first water inlet pipe is connected to the coagulation assembly tank (A), a flocculation area (C) and an inclined tube sedimentation area (D) which are communicated are arranged in the contact flocculation assembly tank (B), the upper part of the flocculation area (C) is communicated with the lower part of the inclined tube sedimentation area (D), the flocculation area (C) is connected with the coagulation assembly tank (A) through a second water inlet pipe, the membrane filtration assembly tank (H) is connected with the upper part of the inclined tube sedimentation area (D) through a third water inlet pipe, a membrane system is arranged in the membrane filtration assembly tank (H) through a pipeline, a water outlet port (H) is connected to the aeration pipe (G) through a control pipeline (I), the membrane filtration assembly tank (B) is connected with the aeration assembly tank (G) through each aeration pipeline (B), the water inlet and the water outlet of the middle water tank (E) are correspondingly connected to the upper part of the inclined tube sedimentation zone (D) and the upper part of the coagulation assembly pool (A) through a fourth water inlet tube and a fifth water inlet tube, and the on-off of the pipelines is controlled through arranging valves on the pipelines; the device comprises a first water inlet valve (2) arranged on a first water inlet pipe, a third water inlet valve (25) arranged on a third water inlet pipe, and a fourth water inlet valve (23) arranged on a fourth water inlet pipe, wherein a first dosing assembly pool (F) is a polyaluminium chloride coagulation dosing assembly pool, a second dosing assembly pool (G) is a potassium permanganate reinforced ferric chloride coagulation dosing assembly pool, a water inlet distributor (8), gravel (13) and a self-cleaning component for flushing the gravel (13) are arranged in a flocculation area (C), the water inlet distributor (8) is arranged in the middle of the flocculation area (C) and is communicated with the second water inlet pipe, and a wastewater outlet of the self-cleaning component is connected to the coagulation assembly pool (A) through a wastewater pipe;
when dealing with high turbidity water feed water treatment, the method comprises the following steps:
firstly, putting a corresponding dosage of polyaluminum chloride into a first dosing assembly tank (F), and putting a corresponding dosage of potassium permanganate reinforced ferric chloride coagulant into a second dosing assembly tank (G);
Step two, opening a first water inlet valve (2) through raw water to be treated, opening a fourth water inlet valve (23) to enable a coagulation assembly tank (A), a contact flocculation assembly tank (B) and an intermediate water tank (E) to form a circulating system, closing the first water inlet valve (2) when the first batch of water enters the intermediate water tank (E), fully and uniformly mixing a polyaluminium chloride coagulant in the coagulation assembly tank (A), entering the contact flocculation assembly tank (B) to complete primary flocculation and primary sedimentation, entering the coagulation assembly tank (A) after passing through the intermediate water tank (E), fully and uniformly mixing a potassium permanganate reinforced ferric chloride coagulant in the coagulation assembly tank (A), and flowing into the contact flocculation assembly tank (B) to complete secondary flocculation and secondary sedimentation;
Step three, closing a fourth water inlet valve (23), opening a third water inlet valve (25), closing the third water inlet valve (25) when the first batch of treated water in the step two enters a membrane filter assembly pool (H), opening the fourth water inlet valve (23), and performing secondary coagulation treatment on the next batch of raw water to be treated;
And step four, after the first batch of effluent enters the membrane filter assembly tank (H), the first batch of effluent enters the effluent tank (I) in a siphon mode.
2. The method of claim 1, wherein the contact flocculation assembly tank (B) comprises a main shell (101), a baffle plate (102) and a baffle plate (103), wherein the baffle plate (103) and the baffle plate (102) are staggered up and down and are fixedly arranged in the main shell (101) in parallel, a channel is formed between the baffle plate (102) and the baffle plate (103), the top end of the channel is communicated with the flocculation zone (C), and the bottom end of the channel is communicated with the inclined tube sedimentation zone (D).
3. The use method of the device is characterized in that stirring devices (3) are respectively arranged in the coagulation assembly tank (A), the first dosing assembly tank (F) and the second dosing assembly tank (G), the bottoms of the coagulation assembly tank (A), the contact flocculation assembly tank (B), the membrane filtration assembly tank (H), the water outlet tank (I) and the middle water tank (E) are all connected and provided with blow-down pipes, perforated sludge discharge pipes (19) are further arranged at the bottoms of the contact flocculation assembly tank (B) and the membrane filtration assembly tank (H), and the bottoms of the contact flocculation assembly tank (B) and the membrane filtration assembly tank (H) are of tapered structures.
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| CN109824186A (en) * | 2019-03-28 | 2019-05-31 | 陕西玉水环境工程有限公司 | Minerals sand, which is promoted, by negative pressure recycles high speed pellets pool process |
| CN112850962A (en) * | 2021-01-20 | 2021-05-28 | 北京翰祺环境技术有限公司 | Efficient precipitation unit, sewage treatment system and sewage treatment method |
| CN115893732A (en) * | 2022-11-22 | 2023-04-04 | 南京师范大学 | Device for synchronously removing conventional pollutants and trace antibiotic pesticides in composite polluted surface water and operation process thereof |
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| CN103896431A (en) * | 2014-03-20 | 2014-07-02 | 河海大学 | Water treatment method combining coagulation-precipitation-re-flocculation-ultrafiltration |
| CN104192964B (en) * | 2014-09-17 | 2016-01-20 | 南京大学 | A kind of sewage water treatment method based on the backflow of flocculation sedimentation tank supernatant liquor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109824186A (en) * | 2019-03-28 | 2019-05-31 | 陕西玉水环境工程有限公司 | Minerals sand, which is promoted, by negative pressure recycles high speed pellets pool process |
| CN112850962A (en) * | 2021-01-20 | 2021-05-28 | 北京翰祺环境技术有限公司 | Efficient precipitation unit, sewage treatment system and sewage treatment method |
| CN115893732A (en) * | 2022-11-22 | 2023-04-04 | 南京师范大学 | Device for synchronously removing conventional pollutants and trace antibiotic pesticides in composite polluted surface water and operation process thereof |
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