CN108328816A - Abrasive waste water treatment process - Google Patents

Abrasive waste water treatment process Download PDF

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Publication number
CN108328816A
CN108328816A CN201810075518.XA CN201810075518A CN108328816A CN 108328816 A CN108328816 A CN 108328816A CN 201810075518 A CN201810075518 A CN 201810075518A CN 108328816 A CN108328816 A CN 108328816A
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CN
China
Prior art keywords
waste water
water
sludge
treatment
abrasive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810075518.XA
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Chinese (zh)
Inventor
周现涛
骆华高
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Ying Rui Tong Environmental Technology Co Ltd
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Guangdong Ying Rui Tong Environmental Technology Co Ltd
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Priority to CN201810075518.XA priority Critical patent/CN108328816A/en
Publication of CN108328816A publication Critical patent/CN108328816A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

The present invention relates to a kind of abrasive waste water treatment process, including:Abrasive waste water enters balancing tank, and the waste water in the balancing tank exports to electric flocculation unit through the first water pump and carries out flocculation treatment;Through electric flocculation unit, treated that waste water is exported to spiral sludge dewatering machine;Device excludes dewaterer cavity, realizes the concentration to sludge;Waste water is followed by the recycle-water handled well after sandfiltration pot, carbon filter tank.Anode of the present invention generates " tiny flocculation agent ", to reduce medicament delivery amount, the also sludge yield of reduction, to realize the effect of energy-saving and emission-reduction;Simultaneously by the way of electrochemical treatment of wastewater dispensing more manual than medicament, standard water discharge is more stable;Whole system reduces dispensing, and without manually controlling pressure mud, the working strength of the operations staff greatly reduced enhances system operability.

Description

Abrasive waste water treatment process
Technical field
The present invention relates to abrasive waste water process fields, and in particular to a kind of abrasive waste water treatment process.
Background technology
Existing abrasive waste water treatment process generally uses physical chemistry to precipitate and filter the treatment process being combined.Band There is the efficient physico-chemical precipitation technology of enhancing sedimentation basin --- efficient sedimentation tank removes major pollutants, selects D types filter tank further Removal SS and organic matter, sludge are carried out dehydrating after being discharged by efficient sedimentation tank by plate and frame filter press.Technological process is as schemed Shown in 1.Main technique process characteristic:(1) efficient sedimentation tank.Efficient sedimentation tank pond body is by mechanical agitation mixed zone, flocculation reaction Area, plug-flow reaction zone, precipitation concentration area and five part of rear mixed zone composition.It is rely on sludge coagulation, cycle, inclined tube separation and A variety of theories such as concentration, by rational waterpower and structure design, that develops collects mud-water separation with sludge condensation function in one The depositing technology of new generation of body.
Raw water after coagulation enters two flocculation tanks, flocculation reaction area be efficient sedimentation tank unique features it One, containing there are one energy dissipation room and a non-mixed pond rooms.First room is energy dissipation room, is expanded by controlling energy The water pump that dissipates and can be changed using flow controls sludge reflux to optimize flocculation reaction.Polymer and returned sludge injection flocculation are anti- Ying Chike enhances the flocculation of water, and the reflux of sludge can give full play to its flocculation, reduce the dosage of medicament, to save fortune Row cost.Second room is non-mixed room, generates larger, the uniform alumen ustum for capableing of rapid precipitation.
Raw water is precipitated and is integrated in one with two functions of sludge condensation by precipitation-concentration basin, using inclined tube separator by alumen ustum It is separated from water, reverse flow detaches water with sludge, is deposited on the sludge of pond bottom by means of the pointed stake equipped with mud scraper system Blender accelerates concentration.
(2) D types filter tank.D types filter tank is a kind of completely new gravity one, has large specific surface area, filtration resistance small Advantage.The filtrate of minute diameter, high degree increase the specific surface area and surface free energy of filtrate, increase the impurity in water With the adsorption capacity of the touch opportunity and filtrate of particle and filtrate, to improve filter efficiency.When filter tank is run, filtering layer hole Rate is gradually reduced along water (flow) direction, and fibre density increases, and realizes ideal in-depth filtration, increases the retaining power of filtering layer. Filtrate affranchises state when cleaning, you can carries out gas and water mixing to filtrate and cleans, effectively restores the strainability of filtrate.
(3) medicine system.Engineering adds 4 kinds of medicaments, aluminium polychloride (PAC), high molecular polymer (PAM), sulfuric acid altogether And chlorine dioxide.Aluminium polychloride and high molecular polymer are important coagulant and flocculant, and sulfuric acid adjusts final outflow water pH, Chlorine dioxide is used for killing virus, bacterium, protist and the algae etc. in waste water.
Physical chemistry precipitates and the treatment process that is combined of filtering is a kind for the treatment of process generally used, be primarily present with Under several disadvantages:1. physical chemistry precipitation is primarily present, addition medicament kind is more, and operating cost is high;
2. control system is complicated, complicated for operation, operations staff's heavy workload;
3. dosage is big, sludge output is big, and sludge treatment is costly;
4. the equipment volume of a whole set for the treatment of process is larger, floor space is larger, and mobility is poor.
Invention content
In order to solve the above technical problems, the object of the present invention is to provide a kind of reduction dosage and sludge yield, reduce Operating personnel's working strength improves system service efficiency, extends the abrasive waste water treatment process of consumptive material service life.
Abrasive waste water treatment process of the present invention, including:Abrasive waste water enters balancing tank, the waste water in the balancing tank It is exported to electric flocculation unit through the first water pump and carries out flocculation treatment;Through electric flocculation unit, treated that waste water is exported to folded spiral shell sludge Dewaterer;The spiral sludge dewatering machine carries out water to waste water, mud detaches namely sludge enters folded spiral shell sludge via positive pressure and takes off The circular cylindrical cavity of water dispenser, under the action of agitating paddle with the hard flocculate that is mixed to form of flocculating polymer agent solution, and As liquid level is slowly moved to the top of thickener cavity, the feed liquor of laminated sludge dehydrator is entered by liquid outlet Mouthful, the clear liquid after sludge is flocculated penetrates the filter core being made of travelling ring and fixed ring at center, wherein shift(ing) ring and fixed ring It is relatively moved to form gap, dewaterer cavity is excluded through drainage arrangement, realizes that the concentration to sludge, the waste water isolated then enter Intermediate pool;
The waste water exported by the intermediate pool is followed by the recycle-water handled well after sandfiltration pot, carbon filter tank, recycle-water Output to input reuse pool stores, and the recycle-water in reuse pool is used for reuse workshop.
Further, the balancing tank be used to collect, store, the water quality and quantity of balanced waste water, the balancing tank is Buried civil engineering structure, mating 4 points of aerated conduit, the pressure 4-6Kg/cm2 in the aeration tube road, the aeration tube in pond Road keeps its waste water dip dyeing object composition balanced for catchmenting in mixing pit.
Further, the sandfiltration pot using quartz sand as filter packing, for remove colloidal particles in waste water and Macromolecule organic, the filtering accuracy of the sandfiltration pot is between 0.005-0.01m.
Further, the carbon filter tank completes the purification of waste water by charcoal bed, forms the activated carbon granule surface of charcoal bed There are some oxygen-containing functional groups on non-crystallized part, the organic pollution in the water by charcoal bed made effectively to be adsorbed by activated carbon, Activated carbon can adsorb the chlorine residue that can not be removed in prime filtering to prevent rear class reverse osmosis membrane by its oxidative degradation, while also inhale Prime of chiming in leaks the small organic molecule pollutant to come, has to peculiar smell, colloid and pigment, heavy metal ion etc. in water Obvious Adsorption effect, also has the function of reducing COD, reduces the SDI values of RO water inlets, ensure SDI<5, TOC< 2.Oppm。
According to the above aspect of the present invention, abrasive waste water treatment process of the present invention has at least the following advantages:
Present invention process is generated by electric flocculation treatment technology, anode " tiny flocculation agent ", to reduce medicament delivery amount, also reduce Sludge yield, to realize the effect of energy-saving and emission-reduction;Simultaneously using the side of electrochemical treatment of wastewater dispensing more manual than medicament Formula, standard water discharge are more stable;Whole system reduces dispensing, without manually controlling pressure mud, the work of the operations staff greatly reduced Intensity enhances system operability.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention, And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
Description of the drawings
The existing abrasive waste water processing technological flow figures of Fig. 1;
Fig. 2 is abrasive waste water processing technological flow figure of the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below Example is not limited to the scope of the present invention for illustrating the present invention.
Abrasive waste water treatment process described in a most preferred embodiment of the invention, including:Abrasive waste water enters balancing tank, institute The waste water stated in balancing tank is exported through the first water pump to electric flocculation unit progress flocculation treatment;Through electric flocculation unit, treated Waste water is exported to spiral sludge dewatering machine;The spiral sludge dewatering machine carries out water, mud separation namely sludge via just to waste water Pressure enters the circular cylindrical cavity of spiral sludge dewatering machine, under the action of agitating paddle with the mixing shape of flocculating polymer agent solution At hard flocculate, and as liquid level is slowly moved to the top of thickener cavity, entered by liquid outlet stacked The inlet of sludge dewatering equipment, sludge be flocculated after clear liquid penetrate center the filter core being made of travelling ring and fixed ring, Middle shift(ing) ring and fixed ring are relatively moved to form gap, exclude dewaterer cavity through drainage arrangement, realize the concentration to sludge, point The waste water separated out then enters intermediate pool;The waste water exported by the intermediate pool after sandfiltration pot, carbon filter tank followed by obtaining The recycle-water handled well, recycle-water are exported to input reuse pool and are stored, and the recycle-water in reuse pool is used for reuse workshop.
In the present embodiment, balancing tank:Have the function of collecting, store and the water quality and quantity of balanced waste water, is mainly used for The effect of adjusting is generally used for total inlet segment of waste water station, to cope with the suddenly change of water quality and quantity from a structural point, Balancing tank is mostly into singly going out.Balancing tank is buried civil engineering structure, mating 4 points of aerated conduit (pressure 4- in pond 6Kg/cm2), for catchmenting in mixing pit, keep its waste water dip dyeing object composition balanced.
Electric flocculation:One complicated process of electric flocculation, metal electrode generates cation into water under the action of electric field Include many physical chemical phenomenons when body, includes three continuous stages to flco is formed from the generation of ion:
Electric flocculation technique is using relatively broad at this stage, is the new technique of acknowledged environmental protection and energy saving, electric flocculation it is anti- It is using metals such as aluminium, iron as anode to answer principle, and under the action of direct current, anode is dissoluted, and generates Al, Fe plasma, is passing through A series of oxidation process of hydrolysis, polymerization and ferrous iron develops into various hydroxo complexes, multinuclear hydroxo complex so that hydrogen-oxygen Compound, make the colloidal state impurity in waste water, suspended impurity coagulative precipitation and detach simultaneously, the contaminant particle of electrification is in the electric field Swimming, Partial charge are neutralized by electrode and it are promoted to take off steady coagulation.
When waste water carries out electrolytic flocculation processing, not only there are coagulative precipitation effect, Er Qieyou to colloidal state impurity and suspended impurity In the oxidation of anode and the reduction of cathode, multiple pollutant in water removal can be removed.
Spiral sludge dewatering machine is also to operate in extensively in the wastewater treatment of industry-by-industry in recent years, spiral sludge dewatering machine work Make principle:Sludge enters the circular cylindrical cavity of spiral sludge dewatering machine via positive pressure, under the action of agitating paddle with macromolecule Flocculant solution is sufficiently effective to be mixed to form hard flocculate, and as liquid level is slowly moved to the top of thickener cavity It is dynamic, the inlet of laminated sludge dehydrator is entered by liquid outlet.Sludge be flocculated after clear liquid through center by swimming The filter core of rotating ring and fixed ring composition(Shift(ing) ring and fixed ring are relatively moved to form gap), dehydration machine cavity is excluded through drainage arrangement Body realizes the concentration to sludge.
Intermediate pool is used with reuse pool only as clear water after purification is temporary, and pond is generally ground steel corrosion knot Other devices are not arranged in pond for structure, and the water inlet of intermediate pool is connect with spiral sludge dewatering machine, and water outlet connects with the pump before sandfiltration pot It connects;Reuse pool is intake to be connected with the water outlet of carbon filter tank, and outlet pipe connects reuse point.
Electric flocculation:One complicated process of electric flocculation, metal electrode generates cation into water under the action of electric field Include many physical chemical phenomenons when body, includes three continuous stages to flco is formed from the generation of ion:
(1)Under the action of electric field, anode generation electronically forms " tiny flocculation agent " --- the hydroxide of iron or aluminium;
(2)Particle, colloid pollution object loss of stability under the action of flocculant to suspend in water;
(3)It is mutually collided between contaminant particle and tiny flocculation agent after taking off surely, is combined into macroscopic big flocculating body.Due to electricity The product of cell reaction is ion in flocculation process, need not add any oxidant or reducing agent, environment is not generated or Seldom generate pollution, a kind of environmental-friendly water technology of being known as.
Since the product of cell reaction during electric flocculation is ion, any oxidant or reducing agent need not be added, Pollution is not generated or seldom generated to environment, a kind of environmental-friendly water technology of being known as.Electric flocculation method has very much Advantage, such as:(1)Equipment is simple, and floor space is few, and plant maintenance is simple;(2)Any chemistry need not be added during electric flocculation The sludge quantity of medicament, generation is few, and the moisture content of sludge is low, is easily handled;(3)It is easy to operate, it is only necessary to change the outer of electric field Making alive can control the change of service condition, it is easy to realize automation control;Common electrode material is in electric flocculation method Aluminium and iron, pass to direct current between the anode and cathode, and the electrode reaction of generation is as follows:
Aluminium anodes Al-3e → Al3e+ (1);
(OH) 3 (2) Al3e++3OH- → Al under alkaline condition;
Al3e++3H2O → Al (OH) 3+3H+ in acid condition(3);
Iron anode Fe-2e → Fe2e+ (4);
(OH) 2 (5) Fe2e++2OH- → Fe under alkaline condition;
4Fe2e++O2+2H2O → 4Fe3e++4OH- in acid condition(6);
In addition, the electrolysis of water also has oxygen to release 2H2O-4e → O2+4H+(7);
Following reaction 2H2O+2e → H2+2OH- occurs in cathode(8);
Electric flocculation method in processing procedure have multifunctionality, in addition to electric flocculation act on other than also have electrochemical oxidation and reduction, The effects that electric floating.
Spiral sludge dewatering machine operation principle:Sludge enters the circular cylindrical cavity of spiral sludge dewatering machine via positive pressure, Under the action of agitating paddle with flocculating polymer agent solution is sufficiently effective is mixed to form hard flocculate, and as liquid level is slow Slow moves to the top of thickener cavity, and the inlet of laminated sludge dehydrator is entered by liquid outlet.Sludge is wadded a quilt with cotton Clear liquid after solidifying penetrates the filter core being made of travelling ring and fixed ring at center(Shift(ing) ring and fixed ring are relatively moved to form sky Gap), dewaterer cavity is excluded through drainage arrangement, realizes the concentration to sludge.
Sandfiltration pot:It is under pressure, the higher water of turbidity to be passed through one using quartz sand as filter medium Determine the quartz sand filtration of the granular or non-grain of thickness, effective retention removes suspended matter in water, organic matter, colloidal particles, micro- Biology, chlorine, odor and part heavy metal ion etc. reach reduction water turbidity eventually, a kind of high efficiency filter for the effect that purifies water is set It is standby.
Sandfiltration pot:Using quartz sand as filler.Be conducive to the impurity in water removal.It also has that filtration resistance is small, compares table The advantages that area is big, and resistance to acid and alkali is strong, and resistance tocrocking is good, the particular advantages of quartz filter also reside in by optimize filtrate and The design of filter realizes the self-adapting operation of filter, and filtrate is to tools such as influent density, operating condition, pretreatment techniques There is very strong adaptivity, i.e., filter bed automatically forms close state under upper dredge in filtering, is conducive to protect at various operating conditions Effluent quality is demonstrate,proved, filtrate fully scatters when backwash, and cleaning performance is good.Sand filter can effectively remove the suspended matter in water, and right The pollutants such as colloid, iron, organic matter, pesticide, manganese, bacterium, virus in water have apparent removal to act on.And there is the rate of filtration Soon, the advantages that filtering accuracy is high, retaining power is big.
In water quality pretreatment system, active carbon filter can adsorb the chlorine residue that can not be removed in prime filtering to prevent Rear class reverse osmosis membrane is also adsorbed the pollutants such as the small organic molecule to come from prime leakage by its oxidative degradation, There is obvious Adsorption to act on peculiar smell, colloid and pigment, heavy metal ion etc. in water, also has the function of reducing COD. The SDI values of RO water inlets can be further decreased, ensure SDI<5, TOC<2.Oppm.
The work of activated carbon filtering tank is completed by charcoal bed.The active carbon particle of composition charcoal bed has much more very micro- Hole and huge specific surface area have very strong physical absorption ability.Water is had by charcoal bed, organic pollutants by activated carbon The absorption of effect ground.In addition there are some oxygen-containing functional groups on activated carbon surface non-crystallized part, make organic dirt in the water by charcoal bed Dye object is effectively adsorbed by activated carbon.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and Modification, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims (4)

1. a kind of abrasive waste water treatment process, which is characterized in that including:Abrasive waste water enters balancing tank, the balancing tank Interior waste water exports to electric flocculation unit through the first water pump and carries out flocculation treatment;Through electric flocculation unit treated waste water exports to Spiral sludge dewatering machine;The spiral sludge dewatering machine enters waste water progress water, mud separation namely sludge via positive pressure folded The circular cylindrical cavity of screwed sludge dewatering equipment machine is mixed to form hard wadding under the action of agitating paddle with flocculating polymer agent solution Condensate, and as liquid level is slowly moved to the top of thickener cavity, laminated sludge dehydrator is entered by liquid outlet Inlet, sludge be flocculated after clear liquid penetrate center the filter core being made of travelling ring and fixed ring, wherein shift(ing) ring and Fixed ring is relatively moved to form gap, excludes dewaterer cavity through drainage arrangement, realizes the concentration to sludge, the waste water isolated Then enter intermediate pool;The waste water exported by the intermediate pool returns followed by what is handled well after sandfiltration pot, carbon filter tank With water, recycle-water is exported to input reuse pool and is stored, and the recycle-water in reuse pool is used for reuse workshop.
2. abrasive waste water treatment process according to claim 1, which is characterized in that the balancing tank is for collecting, storing up It deposits, the water quality and quantity of balanced waste water, the balancing tank is buried civil engineering structure, mating 4 points of aerated conduit, institute in pond The pressure 4-6Kg/cm2 of aerated conduit is stated, the aeration tube road keeps its waste water dip dyeing object composition equal for catchmenting in mixing pit Weighing apparatus.
3. abrasive waste water treatment process according to claim 1, which is characterized in that the sandfiltration pot uses quartz sand conduct Filter packing, for removing colloidal particles and macromolecule organic in waste water, the filtering accuracy of the sandfiltration pot is in 0.005- Between 0.01m.
4. abrasive waste water treatment process according to claim 1, which is characterized in that the carbon filter tank is completed by charcoal bed The purification of waste water, forming on the activated carbon granule surface non-crystallized part of charcoal bed has some oxygen-containing functional groups, makes through charcoal bed Organic pollution in water is effectively adsorbed by activated carbon, activated carbon can adsorb in prime filtering the chlorine residue that can not remove to prevent Only rear class reverse osmosis membrane is by its oxidative degradation, while also adsorbing from prime and leaking the small organic molecule pollutant to come, There is obvious Adsorption to act on peculiar smell, colloid and pigment, heavy metal ion etc. in water, also there is the work for reducing COD With the SDI values of reduction RO water inlets ensure SDI<5, TOC<2.Oppm.
CN201810075518.XA 2018-01-26 2018-01-26 Abrasive waste water treatment process Pending CN108328816A (en)

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Cited By (1)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Application publication date: 20180727