CN113800686B - Oil stain water quality treatment system and treatment method thereof - Google Patents
Oil stain water quality treatment system and treatment method thereof Download PDFInfo
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- CN113800686B CN113800686B CN202111189465.2A CN202111189465A CN113800686B CN 113800686 B CN113800686 B CN 113800686B CN 202111189465 A CN202111189465 A CN 202111189465A CN 113800686 B CN113800686 B CN 113800686B
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
- C02F1/5236—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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/766—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens by means of halogens other than chlorine or of halogenated compounds containing halogen other than chlorine
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The invention discloses an oil stain water quality treatment system and a treatment method thereof, belonging to the technical field of oil stain water quality treatment, wherein the oil stain water quality treatment system comprises a dosing station, a water distribution well connected with the dosing station, a fluoridation unit connected with the water distribution well, a sewage disposal pool and a filtering device connected with the fluoridation unit, a sludge recovery pool connected with the sewage disposal pool, and a sludge outward transportation unit connected with the sludge recovery pool, wherein raw water and a liquid medicine of PAC and PAM with a certain flow rate are added into a dissolving pool to be stirred and mixed to accelerate coagulation efficiency by respectively dissolving the water of the water distribution well in a coagulation mode and a precipitation mode and then are added into a clean water pool to discharge floccules; in order to clear away the impurity that is kept apart by the filtering pond, will the filtering pond designs three kinds of modes of washing, firstly washes through the air, washes through the air water again, and water washing at last, and the three kinds of modes are clear away the impurity that is held back by the filtering pond, improve the recovery ability of filtering pond.
Description
Technical Field
The invention relates to an oil stain water quality treatment system, in particular to an oil stain water quality treatment system and an oil stain water quality treatment method.
Background
Water is the body of life, the natural source, the blood of the city, the lifeline of the city;
tap water is closely related to the life of people, and the quality of the oil stain water is related to the health of people, so that the optimization of the production process has important significance;
in the water treatment process, dosing flocculation is an important link of water treatment of oil stains in a water plant. According to statistics, half of unsafe factors of water supply are influenced by human factors under the condition of equal resource allocation. As a key link of an automatic control system of a water plant, the automatic chemical dosing control system can realize real-time inspection of oil stain water quality parameters, structure and equipment state parameters, can ensure that the chemical dosing process and state are in a real-time controlled state, timely finds problem precursors which are difficult to find by an operator, and immediately takes treatment measures, thereby avoiding the influence of human factors on the chemical dosing system.
Disclosure of Invention
The purpose of the invention is as follows: a water treatment system and a treatment method for oil contamination, which are used for solving the problems in the prior art;
the technical scheme is as follows: a greasy dirt water quality treatment system comprises a dosing station, a water distribution well connected with the dosing station, a chlorination unit connected with the water distribution well, a sewage disposal pool and a filtering device connected with the chlorination unit, a sludge recovery pool connected with the sewage disposal pool, and a sludge outward transportation unit connected with the sludge recovery pool; the chlorination unit comprises a mechanical mixing tank, a flocculation tank connected with the mechanical mixing tank, a sedimentation tank connected with the flocculation tank, a filter tank connected with the sedimentation tank and a clean water tank connected with the filter tank;
the chlorination unit also comprises a front chlorination unit and a rear chlorination unit; the front chlorination unit is arranged between the distribution well and the mechanical mixing tank and between the sedimentation tank and the filter tank, and the rear chlorination unit is arranged between the clean water tank and the filter tank;
the filter tank is also connected with a recovery water tank, the recovery water tank is connected with a sludge recovery tank, the mechanical mixing tank, the flocculation tank and the sedimentation tank are respectively communicated with a sewage disposal tank, and the recovery water tank is also communicated with a water distribution well;
the filter is designed in a V shape and comprises a filter body, a first water filtering part arranged at the bottom of the filter body, a filter arranged on the filter body and positioned at the upper side of the first water filtering part, a second water filtering part arranged above the filter, filter sand arranged in the second water filtering part, a cover plate arranged on the side wall of the filter body and positioned above the second water filtering part, a water filtering part to be filtered arranged at the upper side of the second water filtering part and a water inlet part arranged above the water filtering part to be filtered;
the top of the filter body is provided with a filter water line and a water inlet valve arranged above the filter water line; a drain valve is arranged below the water inlet valve, and a water outlet valve is arranged at the bottom of the filter body; the sludge recovery tank is connected with a recovery system.
In a further embodiment, the dosing station comprises a first metering pump, a second metering pump and a water inlet valve which are connected with raw water, a first electromagnetic valve connected with the first metering pump, an auxiliary agent pool which is connected with the first electromagnetic valve and used for decomposing and dissolving, a first air blower connected with the auxiliary agent pool, a second metering pump connected with the water inlet valve, a second electromagnetic valve connected with the second metering pump, a coagulation pool connected with the second electromagnetic valve, a second air blower connected with the coagulation pool, a first mixing pool arranged at the other end of the water inlet valve, a second mixing pool communicated with the first mixing pool, a blow-down valve connected with the second mixing pool and a recovery pool connected with the blow-down valve;
the second mixing tank is also connected with the filter tank;
in a further embodiment, the recovery tank comprises a mud scraping vehicle used for scraping sludge at the bottom of the recovery tank in a reciprocating motion, an inlet channel arranged on one side of the recovery tank, and a blowdown channel arranged on the other side of the inlet channel;
the upper layer in the recovery tank is clean and is pumped into a second mixing tank through a recovery pump;
in a further embodiment, the dosing station comprises a turbidity meter, a dosing PLC connected with the turbidity meter, a computer and a frequency modulation controller connected with the dosing PLC, a metering pump connected with the frequency modulation controller, a stroke controller connected with the metering pump, and a flow meter connected with the dosing PLC;
the chlorination unit further comprises a filter station PLC connected with the computer, an adjusting valve connected with the filter station PLC, and a water level meter arranged in the filter and used for detecting the water level.
In a further embodiment, the method comprises the following steps:
step 1, starting a dosing station, dosing raw water, mixing the raw water with the water, and enabling floccules after dosing reaction to enter a chlorination unit;
step 2, the floccules enter a mechanical mixing tank to be stirred and mixed;
step 3, adding a retarder in the flocculation tank, reacting the coagulant in water to enable colloidal particles to fall off to form tiny flocculates, and feeding the tiny flocculates into the flocculation tank;
step 4, allowing the silt to flow into a sedimentation tank, and settling and separating alum particles generated by dosing and coagulating the silt in the raw water from the water under the action of gravity;
step 5, entering a filter tank, firstly performing air washing, then performing air-water washing on the filter tank, and finally performing water washing;
and 7, flowing the water from the filter into a clean water tank for storage.
Has the advantages that: the invention discloses an oil stain water quality treatment system, which is characterized in that water in a distribution well is coagulated, precipitated and dissolved respectively, stirring and accelerated mixing are added, raw water and medicinal liquid of PAC and PAM with a certain flow are added into a dissolution tank, stirred, mixed and accelerated coagulation efficiency is achieved, then the raw water enters a filter tank and finally enters a clean water tank, and a flocculating constituent is discharged; in order to remove impurities isolated by the filter, the filter is designed into three washing modes, wherein the filter is subjected to air backwashing, namely air inflation washing, air water washing and final water washing, and the three modes are used for removing the impurities intercepted by the filter, so that the recovery capacity of the filter is improved. And a recovery tank is added, and in northwest where water resources are not abundant, the waste water generated by washing the sediment and the filter tank is recycled, so that the utilization of the water resources is improved.
Drawings
FIG. 1 is a system flow diagram of the present invention;
FIG. 2 is a flow diagram of a chlorination unit of the present invention;
FIG. 3 is a schematic view of the construction of the recovery tank according to the present invention;
FIG. 4 is a flow diagram of a filtration apparatus of the present invention;
FIG. 5 is a flow chart of the dosing station of the present invention;
FIG. 6 is a schematic structural view of a filter according to the present invention.
The reference signs are: the device comprises a dosing station 1, a chlorination unit 2, a sewage disposal pool 3, a sludge recovery pool 4, a sludge outward transportation unit 5, a first water filtering part 6, a filter body 7, a filter head 8, a second water filtering part 9, a cover plate 10, a water to be filtered part 11, a water inlet part 12, a water inlet valve 13, a filter water level line 14, a sewage disposal valve 15, filter sand 17 and a water outlet valve 16.
Detailed Description
According to the oil stain water quality treatment system and the oil stain water quality treatment method, in the water treatment process, dosing flocculation is an important link of oil stain water quality treatment of a water plant. According to statistics, half of unsafe factors of water supply are influenced by human factors under the condition of equal resource allocation. As a key link of an automatic control system of a water plant, the automatic chemical dosing control system can realize real-time inspection of oil stain water quality parameters, structure and equipment state parameters, can ensure that the chemical dosing process and state are in a real-time controlled state, timely finds problem precursors which are difficult to find by an operator, and immediately takes treatment measures, thereby avoiding the influence of human factors on the chemical dosing system. The present invention is further illustrated by the following embodiments in combination with the accompanying drawings. An oil stain water quality treatment system comprises a dosing station 1, a chlorination unit 2, a sewage disposal pool 3, a sludge recovery pool 4, a sludge outward transportation unit 5 and the like;
the chemical dosing station is connected with the water distribution well, the chlorination unit is connected with the water distribution well, the sewage disposal pool is connected with the chlorination unit, the sludge recovery pool is connected with the sewage disposal pool, the sludge outward transportation unit is connected with the sludge recovery pool, and the sludge recovery pool is connected with the recovery system. The dosing station comprises a first metering pump, a second metering pump and a water inlet valve which are connected with a water distribution well, an electromagnetic valve connected with the first metering pump, an auxiliary agent pool which is connected with the first electromagnetic valve and is used for decomposing and dissolving, a first air blower connected with the auxiliary agent pool, a second metering pump connected with the water inlet valve, a second electromagnetic valve connected with the second metering pump, a coagulation pool connected with the second electromagnetic valve, a second air blower connected with the coagulation pool, a first mixing pool arranged at the other end of the water inlet valve, a second mixing pool communicated with the first mixing pool, a filter pool and a blow-down valve which are connected with the second mixing pool, and a recovery pool which is respectively connected with the blow-down valve;
specifically, a first air blower and a second air blower are used for air flushing;
the chlorination process is designed into three stages, namely before chlorination, in a chlorination chamber and after chlorination, pumping water from a distribution well into a mechanical mixing tank, namely before chlorination, pumping water from the distribution well into a recovery tank, namely a chlorination chamber, sequentially feeding the water in the distribution well into the mechanical mixing tank, the flocculation tank, a sedimentation tank and a filter tank, feeding the water from the filter tank into the recovery tank, namely a chlorination chamber, wherein the water in the distribution well flows into the mechanical mixing tank and is chlorinated once, the water in the sedimentation tank flows into the filter tank and is chlorinated once, the water in the filter tank flows into a clear water tank for chlorination again, the first chlorination is carried out on a water source pipe to kill microorganisms and oxidative decomposition organic matters in the raw water, and the coagulation, sedimentation and filtration are processes for a long time, so that the residual chlorine content in the filtered water is not influenced by the previous chlorination, and the residual chlorine content in the filtered water is not disinfected through a water source pipe, and the added into the clear water tank is not disinfected through a chlorine feeding pipeline;
coagulating sedimentation is to dissolve coagulant (PAC) and coagulant aid (PAM) respectively, and put PAC, PAM and clear water into the liquid medicine in a certain proportion respectively, and accelerate the mixing by a stirrer. Then raw water and liquid medicine of PAC and PAM with certain flow are added into the first mixing tank and mixed by a stirrer, and the mixed liquid is discharged into the second mixing tank, so that a coagulant is fully reacted with the raw water, and the coagulation effect is enhanced. And finally, the raw water flows into the filter tank, and finally a drain valve at the bottom of the second mixing tank is opened to discharge other floccules out of the recovery tank.
As a preferred scheme, the flocculant used in the invention is a neutral medicament, and the characteristics of PH, alkalinity and the like in the oil stain water can not be changed;
have certain water yield to store for the waterworks, consequently set up the clean water basin, make things convenient for the water yield storage and the waste water utilization of water resource not very abundant regional position simultaneously, consequently designed the recovery pond, the recovery pump is connected to recovery pond one end, the recovery pump is connected with the flocculation basin, the recovery pond is including being used for scraping the mud scraping car of bottom of the pool mud of scraping of back and forth movement in the recovery pond, the inlet channel sets up the blowdown canal at the inlet channel opposite side, and the sewage that sedimentation tank and filtering pond washed flows into the recovery pond from the inlet channel, through adding medicine flocculation and value regulation, through the deposit of a period of time, the partial mud of aquatic subsides at the bottom of the pool. Then starting a mud scraping vehicle, enabling the mud scraping vehicle to move back and forth in the recovery tank, scraping sludge at the bottom of the tank, pumping muddy water at the bottom of the tank into a sewage discharge channel by a water pump on the mud scraping vehicle, and finally discharging the muddy water into an urban sewage system;
the filter device comprises a water inlet pipe connected with the water inlet valve, a filter tank arranged below the water inlet pipe and a drain pipe connected with the filter tank, wherein one end of the drain pipe is connected with the drain valve, and the other end of the drain pipe is connected with a recovery tank; the bottom of the filter is respectively connected with a water flushing pipeline and an air flushing pipeline; the water flushing pipeline is connected with the water flushing valve, the air flushing pipeline is connected with the air flushing valve, the other end of the water flushing valve is connected with the flushing water pump, and the other end of the air flushing valve is connected with a third air blower. The upper layer in the recovery tank is clean and is pumped into a second mixing tank through a recovery pump;
the chlorination unit comprises a mechanical mixing tank, a flocculation tank connected with the mechanical mixing tank, a sedimentation tank connected with the flocculation tank, a filter tank connected with the sedimentation tank, and a clean water tank connected with the filter tank;
the chlorination unit is divided into a front chlorination unit and a rear chlorination unit; the front chlorination unit is arranged between the water distribution well and the mechanical mixing tank and between the sedimentation tank and the filter tank;
the rear chlorination unit is arranged between the clean water tank and the filter tank;
the chlorination unit comprises a front chlorination unit and a rear chlorination unit; the front chlorination unit comprises a mechanical mixing tank, a flocculation tank connected with the mechanical mixing tank, a sedimentation tank connected with the flocculation tank, a filter tank connected with the sedimentation tank, and a clean water tank connected with the filter tank; and chlorine is added between the clean water tank and the filter tank, and the chlorine adding unit belongs to a post-chlorination unit. The other end of the filter tank is connected with a recovery water tank, the recovery water tank is connected with a sludge recovery tank, and the mechanical mixing tank, the flocculation tank and the sedimentation tank are respectively communicated with a sewage disposal tank; the recovery water tank is also communicated with a distribution well;
as a preferred scheme, the filter tank is designed into a V shape; the filter comprises a filter body 7, a first water filtering part 6 arranged at the bottom of the filter body 7, a filter head 8 arranged on the filter body 7 and positioned at the upper side of the first water filtering part 6, a second water filtering part 9 arranged above the filter head 8, filter sand 17 arranged inside the second water filtering part 9, a cover plate 10 arranged on the side wall of the filter body 7 and positioned above the second water filtering part 9, a water to be filtered 11 arranged at the upper side of the second water filtering part 9, and a water inlet part 12 arranged above the water to be filtered 11;
the top of the filter body 7 is provided with a filter water level line 14, and a water inlet valve 13 is arranged above the filter water level line 14;
a blowdown valve 15 is arranged below the water inlet valve 13;
a water outlet valve 16 is arranged at the bottom of the filter body 7;
the system is provided with at least 8 groups of filter tanks, wherein the middle of each filter tank is provided with a drainage channel, and the filter tanks are divided into a left grid and a right grid by adopting a double-layer central channel. The drainage channel drains back-flushed dirty water and dirt into the recovery tank for utilization. The lower layer is a distribution channel for separating water and gas for back washing. The back flushing provides water for transverse sweeping, and the air pipe conveys air between the third air blower and the flushing water pump to the filter pool for flushing sand. The bottom of the V-shaped groove is provided with a row of small holes, so that water can be fed during filtering and can be used for transversely sweeping and washing cloth during washing;
the working principle of the filter is as follows: the drain valve is closed, the water inlet valve 13 is opened, and the effluent of the clarification tank flows through the pipeline and enters the profiled groove through the water inlet valve 13 of the filter tank and the side hole. The small holes at the bottom of the tank are small, and water to be filtered can overflow through the small holes and the tank top and slowly enter the filter tank. The water in the filter tank reaches a certain water level and is kept, after being filtered by filtering sand, the filtered water is sent to a clean water tank by adjusting the opening degree of a water outlet valve 16;
when the filter tank filters for a certain time, sediment filtered by the filter sand 17 reaches a certain amount, which causes clearance blockage of the filter sand 17 and can not be filtered normally, at the moment, the cover plate 10 is started, the second water filtering part 9 is closed, at the moment, the filter sand 17 is washed clean through timely backwashing, the filter program is returned again, when backwashing is carried out, the reclaimed water in the filter tank body 7 does not reach the water level line, the water inlet valve 13 is continuously opened until the reclaimed water reaches the water level line 14 of the filter tank, the water inlet valve 13 is closed, simultaneous water inlet and backwashing can be realized, the backwashing operation is finished, the cover plate 10 is opened, the filtering operation is continued, the filtering efficiency is improved, the water level line is arranged in the filter tank, the liquid level of the filter tank is controlled to be constant, the filtering speed is kept to be constant, and the stable effluent turbidity is realized. Meanwhile, the 8 groups of filter tanks can be simultaneously controlled and can also independently operate without mutual interference;
based on modern automatic control management, the dosing station and the filtering device respectively adopt computer control systems, and respective PLC control systems are arranged, so that the dosing station and the filtering device can be dispatched by a central control room, but do not depend on the central control room, and can perform decentralized control on each process; then the central control room carries out centralized management on all the processes;
the dosing station comprises a system for adding alum, ammonia and chlorine. The water in the distributing well enters a flow meter well and a sampling well, the flow, turbidity value, pressure and the like of the water are detected by an online meter of the water purification plant, and the water is converted into a signal to be input into a system so as to provide control parameters for the system; the dosing station comprises a turbidimeter, a dosing PLC connected with the turbidimeter, a computer and a frequency modulation controller connected with the dosing PLC, a metering pump connected with the frequency modulation controller, a stroke controller connected with the metering pump, and a flowmeter connected with the dosing PLC. The chlorination unit also comprises a filter station PLC connected with a computer, an adjusting valve connected with the filter station PLC, and a water level gauge arranged in the filter for detecting the water level;
a treatment method of an oil stain water treatment system comprises the following steps: step 1, starting a dosing station, dosing raw water, mixing the raw water with water, and enabling floccules after dosing reaction to enter a chlorination unit;
step 2, the floccules enter a mechanical slow mixing pool to be stirred and mixed;
step 3, adding a retarder into the flocculation tank, and allowing the coagulant to enter water to react to enable colloidal particles to fall off to form tiny flocculates which enter the flocculation tank;
step 4, flowing into a sedimentation tank, and settling and separating the water by means of gravity, wherein alum floc particles are generated after the silt in the raw water is subjected to dosing and coagulation;
step 5, entering a filter tank, firstly performing air washing, then performing air-water washing, and finally performing water washing;
and 7, allowing water from the filter tank to flow into a clean water tank for storage.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.
Claims (1)
1. A filter tank is characterized in that: the filter tank is designed into a V shape; the filter comprises a filter body, a first water filtering part arranged at the bottom of the filter body, a filter head arranged on the filter body and positioned above the first water filtering part, a second water filtering part arranged above the filter head, filter sand arranged in the second water filtering part, a cover plate arranged on the side wall of the filter body and positioned above the second water filtering part, a water to be filtered arranged above the second water filtering part, and a water inlet part arranged above the water to be filtered;
the top of the filter body is provided with a filter water level line, and a water inlet valve is arranged above the filter water level line; a drain valve is arranged below the water inlet valve;
a water outlet valve is arranged at the bottom of the filter body;
when the filter tank filters for a certain time, sediment filtered by the filter sand reaches a certain amount, so that a filter sand gap is blocked and normal filtration cannot be performed, the cover plate is started to close the second water filtering part, the filter sand is washed clean by timely backwashing, the filter tank returns to the filtering program again, when backwashing is performed, the reclaimed water in the filter tank body does not reach a water line, the water inlet valve is continuously opened until the reclaimed water reaches the water line of the filter tank, the water inlet valve is closed, so that water inlet and backwashing can be performed simultaneously, the backwashing operation is finished, the cover plate is opened, the filtering operation is continued, the filtering efficiency is improved, meanwhile, the water line is arranged in the filter tank, the liquid level of the filter tank is controlled to be constant, so that the filtering speed is kept to be constant, and the turbidity stability of the discharged water is realized.
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| CN202111189465.2A CN113800686B (en) | 2021-10-13 | 2021-10-13 | Oil stain water quality treatment system and treatment method thereof |
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| CN202111189465.2A CN113800686B (en) | 2021-10-13 | 2021-10-13 | Oil stain water quality treatment system and treatment method thereof |
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| CN206188539U (en) * | 2016-11-18 | 2017-05-24 | 河南同恒节能科技有限公司 | Easy use,long service life, |
| CN206408022U (en) * | 2017-01-22 | 2017-08-15 | 郑州高新供水有限责任公司 | A kind of tap water purifying system |
| CN106830430A (en) * | 2017-03-07 | 2017-06-13 | 李如意 | The efficient fast treating process and method of a kind of low temperature and low turbidity water |
| CN112225346A (en) * | 2020-09-23 | 2021-01-15 | 华蓝设计（集团）有限公司 | Water purification method suitable for low-temperature and low-turbidity period |
| CN113415916A (en) * | 2021-06-04 | 2021-09-21 | 广州市自来水有限公司 | Tap water treatment system |
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