CN113800686A - Oil stain water quality treatment system and treatment method thereof - Google Patents

Oil stain water quality treatment system and treatment method thereof Download PDF

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Publication number
CN113800686A
CN113800686A CN202111189465.2A CN202111189465A CN113800686A CN 113800686 A CN113800686 A CN 113800686A CN 202111189465 A CN202111189465 A CN 202111189465A CN 113800686 A CN113800686 A CN 113800686A
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water
tank
filter
pool
valve
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CN113800686B (en
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陈文占
何克明
董丽华
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Shanghai Shuitian First Line Environmental Technology Co ltd
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Shanghai Shuitian First Line Environmental Technology Co ltd
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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]
    • 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
    • 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
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

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

Oil stain water quality treatment system and treatment method thereof
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, is the blood in cities, the life line in cities.
Tap water is closely related to the life of people, and the quality of oil stain water is related to the health of people, so the optimization of the production process of the water-saving oil stain-removing agent 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, under the condition of equal resource allocation, half of unsafe factors of water supply are influenced by human factors. As a key link of the automatic control system of the 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 out the problems which are difficult to find by operators 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: an oil stain water quality treatment system and a treatment method thereof, which aim to solve 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 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;
the sludge recovery tank is connected with a recovery system.
In a further embodiment, the filtering device comprises a water inlet pipe connected with a water inlet valve, a filter tank arranged below the water inlet pipe, and a water discharge pipe connected with the filter tank, wherein one end of the water discharge pipe is connected with the water discharge valve, and the water discharge valve is connected with a recovery tank through a backflushing water discharge pipe;
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.
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;
and the upper layer in the recovery tank is cleanly pumped into the second mixing tank through a recovery pump.
In a further embodiment, the fluoridation 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 fluoridation unit is divided into a front fluoridation unit and a rear fluoridation unit; the front fluorine adding unit is arranged between the water distribution well and the mechanical mixing tank and between the sedimentation tank and the filter tank;
the rear fluoridation unit is arranged between the clean water tank and the filter tank.
In a further embodiment, the filter tank is also connected with a recovery water tank, and 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;
the recovery water tank is also communicated with the distribution well.
In a further embodiment, the dosing station includes a turbidity meter, a dosing PLC connected to the turbidity meter, a computer and frequency modulation controller connected to the dosing PLC, a metering pump connected to the frequency modulation controller, a stroke controller connected to the metering pump, a flow meter connected to the dosing PLC
The fluoridation unit further comprises a filter tank station PLC connected with the computer, an adjusting valve connected with the filter tank station PLC, and a water level meter arranged in the filter tank and used for detecting water level.
In a further embodiment, the filter is designed in 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;
and a water outlet valve is arranged at the bottom of the filter body.
In a further embodiment, the dosing amount of the dosing station has a nonlinear relation with the raw water turbidity;
the relationship between the dosage and the turbidity of raw water is as follows:
Figure 106169DEST_PATH_IMAGE002
in the formula, Q is the dosage,
Figure DEST_PATH_IMAGE003
is the turbidity of the raw water,
Figure 219225DEST_PATH_IMAGE004
、
Figure DEST_PATH_IMAGE005
、
Figure 926062DEST_PATH_IMAGE006
is the coefficient to be set;
because the time of collecting the turbidity of the water source and the collection point are different, the data adopted each time have some errors, so the following data
Figure DEST_PATH_IMAGE007
Figure 974527DEST_PATH_IMAGE008
；
The n matrices are:
Figure DEST_PATH_IMAGE009
Figure 817413DEST_PATH_IMAGE010
;
Figure DEST_PATH_IMAGE011
Figure 609526DEST_PATH_IMAGE012
the conversion formula is:
Figure DEST_PATH_IMAGE013
;
Figure 997301DEST_PATH_IMAGE014
;
wherein A has a transpose matrix of
Figure DEST_PATH_IMAGE015
(i.e., matrix with exchanged row and column designations of matrix elements), matrix
Figure 888771DEST_PATH_IMAGE016
Is expressed as
Figure DEST_PATH_IMAGE017
。
In a further embodiment, the treatment method of the oil stain water quality treatment system comprises the following steps: step 1, starting a dosing station, dosing raw water and mixing the raw water with water, and enabling floccules after dosing reaction to enter a fluoridation 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, 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 on the filter tank, and finally performing water washing;
step 6, during filtering, the water inlet valve is opened, the drain valve, the water flushing valve and the air flushing valve are closed, flocculated water enters the filter tank, and the water entering the filter tank flows to the clean water tank from the clean water pipe after being filtered by the filter tank, so that the whole filtering process is completed;
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 and precipitated to be respectively dissolved, stirring and accelerated mixing are added, raw water and liquid medicine of PAC and PAM with certain flow are added into a dissolving tank to be stirred and mixed to accelerate coagulation efficiency, then the raw water enters a filter tank and finally enters a clean water tank, and flocculating constituents are discharged; in order to remove impurities isolated by the filter, the filter is designed into three washing modes, wherein the three washing modes comprise 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.
The control of a plurality of metering pumps can be controlled by a model calculation method and a raw water flow meter, and each system is controlled by a computer, so that the stability and reliability of the system are guaranteed.
Drawings
FIG. 1 is a system flow diagram of the present invention;
FIG. 2 is a flow diagram of a fluorination 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 view showing the structure of the filter according to the present invention.
The reference signs are: the device comprises a dosing station 1, a fluoridizing 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, under the condition of equal resource allocation, half of unsafe factors of water supply are influenced by human factors. 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 will be further described in detail with reference to the following examples and accompanying drawings.
A greasy dirt water treatment system comprises a dosing station 1, a fluoridation 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 distribution well, the fluoridation unit is connected with the distribution well, the sewage disposal pool is connected with the fluoridation 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 chemical dosing station comprises a first metering pump, a second metering pump, a water inlet valve, an electromagnetic valve, an auxiliary agent pool, a first air blower, a second metering pump, a second electromagnetic valve, a coagulation pool, a second air blower, a first mixing pool, a second mixing pool, a filter pool, a blow-off valve and a recovery pool, wherein the first metering pump, the second metering pump and the water inlet valve are connected with a water distribution well, the electromagnetic valve is connected with the first metering pump, the auxiliary agent pool is connected with the first electromagnetic valve and used for decomposition and dissolution, the first air blower is connected with the auxiliary agent pool, the second metering pump is connected with the water inlet valve, the second electromagnetic valve is connected with the second metering pump, the coagulation pool is connected with the second electromagnetic valve, the second air blower is connected with the coagulation pool, the first mixing pool is arranged at the other end of the water inlet valve, the second mixing pool is communicated with the first mixing pool, the filter pool and the blow-off valve are connected with the blow-off valve respectively.
Specifically, the first and second blowers are used for air flushing.
The fluoridation process is designed into three stages, namely before fluoridation, during fluoridation and after fluoridation, pumping water from a distribution well into a mechanical mixing pool, namely before fluoridation, pumping water from the distribution well into a recovery pool, namely a fluoridation room, sequentially pumping water from the distribution well into the mechanical mixing pool, the flocculation pool, a sedimentation pool and a filter pool, pumping water from the filter pool into the recovery pool, namely the fluoridation room, wherein the fluoridation room is not only performed once during the fluoridation process, the fluoridation is performed once when the water in the distribution well flows into the mechanical mixing pool, the fluoridation is performed once when the water in the sedimentation pool flows into the filter pool, the fluoridation is performed once again during the process that the water in the filter pool flows into a clear water pool, the first fluoridation is performed on a water source pipe to kill microorganisms and oxidize and decompose organic matters in the raw water, because coagulation, sedimentation and filtration are a long-time process, the influence of the former chlorine addition on the residual chlorine content in the water filtered by the filter is small, and the latter fluorine addition is used for disinfection by being added through a pipeline of a clean water tank.
Coagulating sedimentation is to dissolve coagulant (PAC) and coagulant aid (PAM) respectively, and then put PAC, PAM and clear water into the solution respectively to blend into liquid medicine in a certain proportion, and then accelerate the mixing by a mixer. 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 a drain valve at the bottom of the second mixing tank is opened to discharge other floccules out of the recovery tank.
As a preferable scheme, the flocculating agent used by 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 the mud scraping vehicle is started to move back and forth in the recovery tank to scrape the sludge at the bottom of the tank, and the muddy water at the bottom of the tank is pumped into a sewage discharge channel by a water pump on the mud scraping vehicle and is finally discharged into the 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. And the upper layer in the recovery tank is cleanly pumped into the second mixing tank through a recovery pump.
The fluoridation 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 fluoridation unit is divided into a front fluoridation unit and a rear fluoridation unit; the front fluorine adding unit is arranged between the water distribution well and the mechanical mixing tank and between the sedimentation tank and the filter tank;
the rear fluoridation unit is arranged between the clean water tank and the filter tank.
The fluoridation unit comprises a front fluoridation unit and a rear fluoridation unit; the front fluoridation 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 the fluoridation between the clean water tank and the filter tank belongs to a post fluoridation 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 the 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;
the bottom of the filter body 7 is provided with a water outlet valve 16.
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 V-shaped groove bottom 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 the sand, the filtered water is sent to a clean water tank by adjusting the opening degree of the 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; and then the central control room is used for carrying 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 the flowmeter well and the sampling well, the flow, turbidity value, pressure and the like of the water are detected by the water treatment plant on-line instrument, and the water is converted into a signal to be input into the system so as to provide control parameters for the system.
The dosing station comprises a turbidimeter, a dosing PLC (programmable logic controller) 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 flow meter connected with the dosing PLC. The fluoridation unit further comprises a filter tank station PLC connected with the computer, an adjusting valve connected with the filter tank station PLC, and a water level meter arranged in the filter tank and used for detecting water level.
The chemical adding amount of the chemical adding station and the turbidity of raw water form a nonlinear relation;
the relationship between the dosage and the turbidity of raw water is as follows:
Figure 180073DEST_PATH_IMAGE018
in the formula, Q is the dosage,
Figure 762496DEST_PATH_IMAGE003
is the turbidity of the raw water,
Figure DEST_PATH_IMAGE019
、
Figure 562699DEST_PATH_IMAGE020
、
Figure DEST_PATH_IMAGE021
is an undetermined coefficient;
because the time of collecting the turbidity of the water source and the collection point are different, the data adopted each time have some errors, so the following data
Figure 693247DEST_PATH_IMAGE007
Figure 765852DEST_PATH_IMAGE022
；
In the formula, the matrix is:
Figure 588183DEST_PATH_IMAGE009
Figure 167194DEST_PATH_IMAGE010
;
Figure 643875DEST_PATH_IMAGE011
Figure 941127DEST_PATH_IMAGE012
in the formula, the matrix is:
Figure 504832DEST_PATH_IMAGE013
;
Figure DEST_PATH_IMAGE023
;
wherein A has a transpose matrix of
Figure 889415DEST_PATH_IMAGE024
(i.e., matrix with exchanged row and column designations of matrix elements), matrix
Figure DEST_PATH_IMAGE025
Is expressed as
Figure 938929DEST_PATH_IMAGE026
。
A treatment method of an oil stain water quality 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 fluoridation unit;
step 2, the floccules enter a mechanical slow mixing pool 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, 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;
step 6, during filtering, the water inlet valve is opened, the drain valve, the flushing valve and the air flushing valve are closed, flocculated water enters the filter tank, and the water entering the filter tank flows to a clean water tank from a clean water pipe after being filtered by sand filtration, so that the whole filtering process is completed;
and 7, flowing the water from the filter 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 (10)

1. The oil stain water quality treatment system is characterized by comprising 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;
the sludge recovery tank is connected with a recovery system.
2. An oil stain water treatment system according to claim 1, which is characterized in that: the chemical 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 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 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.
3. An oil stain water treatment system according to claim 2, which is characterized in that: the filter device comprises a water inlet pipe connected with a 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 which is connected with a recovery tank through a backflushing drain pipe;
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.
4. An oil stain water treatment system according to claim 2, which is characterized in that: the recovery tank comprises a mud scraping vehicle used for scraping sludge at the bottom of the recovery tank in a reciprocating motion manner, an inlet channel arranged on one side of the recovery tank, and a sewage draining channel arranged on the other side of the inlet channel;
and the upper layer in the recovery tank is cleanly pumped into the second mixing tank through a recovery pump.
5. An oil stain water treatment system according to claim 1, which is characterized in that: the fluoridation 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 fluoridation unit is divided into a front fluoridation unit and a rear fluoridation unit; the front fluorine adding unit is arranged between the water distribution well and the mechanical mixing tank and between the sedimentation tank and the filter tank;
the rear fluoridation unit is arranged between the clean water tank and the filter tank.
6. An oil stain water treatment system according to claim 5, which is characterized in that: the filter tank is also connected with a recovery water tank, and 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;
the recovery water tank is also communicated with the distribution well.
7. An oil stain water treatment system according to claim 6, which is characterized in that: the dosing station comprises a turbidimeter, a dosing PLC (programmable logic controller) 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 flow meter connected with the dosing PLC
The fluoridation unit further comprises a filter tank station PLC connected with the computer, an adjusting valve connected with the filter tank station PLC, and a water level meter arranged in the filter tank and used for detecting water level.
8. An oil stain water treatment system according to claim 6, which 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;
and a water outlet valve is arranged at the bottom of the filter body.
9. An oil stain water treatment system according to claim 8, which is characterized in that: the chemical adding amount of the chemical adding station and the turbidity of raw water form a nonlinear relation;
the relationship between the dosage and the turbidity of raw water is as follows:
Figure DEST_PATH_IMAGE002
in the formula, Q is the dosage,
Figure DEST_PATH_IMAGE004
is the turbidity of the raw water,
Figure DEST_PATH_IMAGE006
、
Figure DEST_PATH_IMAGE008
、
Figure DEST_PATH_IMAGE010
is the coefficient to be set;
because the time of collecting the turbidity of the water source and the collection point are different, the data adopted each time have some errors, so the following data
Figure DEST_PATH_IMAGE012
Figure DEST_PATH_IMAGE014
；
The matrix is:
Figure DEST_PATH_IMAGE016
Figure DEST_PATH_IMAGE018
;
Figure DEST_PATH_IMAGE020
Figure DEST_PATH_IMAGE022
the conversion formula is:
Figure DEST_PATH_IMAGE024
;
Figure DEST_PATH_IMAGE026
;
wherein A has a transpose matrix of
Figure DEST_PATH_IMAGE028
(i.e., matrix with exchanged row and column designations of matrix elements), matrix
Figure DEST_PATH_IMAGE030
Is expressed as
Figure DEST_PATH_IMAGE032
。
10. A treatment method of an oil contamination water treatment system according to claim 9, comprising the steps of: step 1, starting a dosing station, dosing raw water and mixing the raw water with water, and enabling floccules after dosing reaction to enter a fluoridation 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, 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 on the filter tank, and finally performing water washing;
step 6, during filtering, the water inlet valve is opened, the drain valve, the water flushing valve and the air flushing valve are closed, flocculated water enters the filter tank, and the water entering the filter tank flows to the clean water tank from the clean water pipe after being filtered by the filter tank, so that the whole filtering process is completed;
and 7, flowing the water from the filter into a clean water tank for storage.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5547584A (en) * 1994-03-17 1996-08-20 Electronic Drilling Control, Inc. Transportable, self-contained water purification system and method
US20130319922A1 (en) * 2012-05-29 2013-12-05 Ricardo Augusto FITTIPALDI DIAS Compact and mobile equipment and filtering system for potabilization of polluted water
CN103739124A (en) * 2014-01-24 2014-04-23 太平洋水处理工程有限公司 Efficient water treatment device and water treatment method
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,
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
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
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

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5547584A (en) * 1994-03-17 1996-08-20 Electronic Drilling Control, Inc. Transportable, self-contained water purification system and method
US20130319922A1 (en) * 2012-05-29 2013-12-05 Ricardo Augusto FITTIPALDI DIAS Compact and mobile equipment and filtering system for potabilization of polluted water
CN103739124A (en) * 2014-01-24 2014-04-23 太平洋水处理工程有限公司 Efficient water treatment device and water treatment method
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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