CN117585865B - A pretreatment device and method for multi-type wastewater - Google Patents
A pretreatment device and method for multi-type wastewaterInfo
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- CN117585865B CN117585865B CN202311856532.0A CN202311856532A CN117585865B CN 117585865 B CN117585865 B CN 117585865B CN 202311856532 A CN202311856532 A CN 202311856532A CN 117585865 B CN117585865 B CN 117585865B
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
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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
- C02F1/722—Oxidation by peroxides
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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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
本发明公开了一种多类型废水的预处理装置及方法，多类型废水包括化工品废水及含油废水，预处理装置包括：依次连通的储罐组件、混凝气浮组件及多元催化氧化组件；储罐组件包括与各类型废水对应的多个废水储罐，混凝气浮组件为包括刮油器及加压溶气气浮机，加压溶气气浮机通过加压气体去除乳化溶解物质，刮油器设置于加压溶气气浮机的上方，用于去除废水中的悬浮物质；多元催化氧化组件内设有催化腔，催化腔内设置有多种类型的催化氧化构件，多类型废水的有机污染物经催化腔内催化氧化构件的作用实现降解。针对多类别废水进行分类收集、分别处理，通过多种类型的催化氧化构件实现对有机化合物的快速降解，保证出水末端水质处于持续达标状态。
The present invention discloses a pretreatment device and method for multiple types of wastewater, including chemical wastewater and oily wastewater. The pretreatment device comprises a sequentially connected storage tank assembly, a coagulation and flotation assembly, and a multi-component catalytic oxidation assembly. The storage tank assembly includes multiple wastewater storage tanks corresponding to each type of wastewater. The coagulation and flotation assembly includes an oil scraper and a pressurized dissolved air flotation machine. The pressurized dissolved air flotation machine removes emulsified and dissolved substances using pressurized gas. The oil scraper is located above the pressurized dissolved air flotation machine to remove suspended matter in the wastewater. The multi-component catalytic oxidation assembly includes a catalytic chamber containing multiple types of catalytic oxidation components. Organic pollutants in the multiple types of wastewater are degraded by the catalytic oxidation components within the catalytic chamber. Multiple types of wastewater are collected and treated separately, and the multiple types of catalytic oxidation components are used to rapidly degrade organic compounds, ensuring that the water quality at the outlet remains consistently up to standard.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a pretreatment device and method for multiple types of wastewater.
Background
In wastewater treatment stations in industrial areas (e.g., port yards, etc.), it is often necessary to treat various types of wastewater produced by different areas. Such as acid-base wastewater, chemical wastewater at a terminal, and ship washing water at a harbor area.
The wastewater quality is greatly fluctuated due to different production procedures, different treatment processes are needed for different wastewater, various types of wastewater can be treated in different modes, for example, oily wastewater is firstly subjected to oil removal and turbidity removal treatment, acid-base wastewater can enter a rear-end treatment system after neutralization or directly reach the standard for discharge, chemical wastewater needs to be subjected to pretreatment to degrade toxic substances so as to ensure the normal operation of a biochemical system, and low-concentration wastewater such as ground cleaning wastewater, domestic sewage and the like can directly enter the biochemical system.
For comprehensive treatment of various kinds of wastewater, some researches are currently performed. For example, patent CN109626749a provides a multifunctional integrated sewage treatment device and its treatment process, and the sewage treatment device uses the structural characteristics of the obel oxidation ditch, vertical flow sedimentation tank and biochemical treatment to synthesize the technological characteristics of flocculation, hydrolysis, membrane bioreactor and filtration, and is designed into a circular column type integrated steel body structure, and is internally provided with an inner cylinder, a middle cylinder and an outer cylinder. The sewage treatment device is divided into seven areas according to the treatment process flow and functions, namely a flocculation precipitation area, a hydrolysis acidification area, an oil foam removal area, an anoxic area, a biological film reaction area, an adsorption filtration area and a clear water area, so that the effective treatment of different industries and different types of sewage and the unattended operation of PLC automatic control are realized, and the sewage treatment device can be divided into automatic operation and intelligent control operation according to the investment limit, wherein the sewage treatment standard of a monomer processor is 250 tons/day at maximum.
In addition, for example, patent CN112851018a provides a process and a device for treating wastewater in a silicon industrial park, which aims at the technical problems that in the prior art, the salt is high, the biochemistry is difficult when the white carbon black wastewater and the park comprehensive wastewater are mixed, and the ammonia nitrogen and the total nitrogen in the park comprehensive wastewater are high, the carbon nitrogen ratio is low, the treatment effect of the traditional denitrification process is not ideal, and a large amount of carbon sources are required to be additionally added when the two types of wastewater are subjected to split treatment. The scheme provides a silicon industrial park wastewater treatment process, which utilizes sulfate in white carbon black wastewater to be converted into reduced sulfur through taking out a small part of wastewater side-by-pass in the white carbon black wastewater, provides a sulfur source for sulfur autotrophic denitrification flora, and realizes the removal of nitrogen pollution of wastewater with low carbon nitrogen ratio under the condition of no carbon source addition. The scheme also provides a dissimilating/denitriding device, which can realize sulfur conversion and sulfur autotrophic denitriding reaction in the same device, realizes high-efficiency treatment of two different types of wastewater, has compact rhythm, no transfer process and high reaction efficiency.
However, the treatment of multiple types of wastewater in the prior art is still limited to the traditional wastewater treatment mode, and fluctuation of water quality caused by different amounts of wastewater of various types is not considered, so that the water outlet end can not be ensured to be in a standard state all the time.
Therefore, how to design a pretreatment device for multiple types of wastewater, which can cope with various types of wastewater, ensure stable water quality under different wastewater amounts, and realize that the water quality at the tail end of the water is in a continuous standard-reaching state is a problem to be solved by the technicians in the field.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a pretreatment device and a pretreatment method for multi-type wastewater, wherein the multi-type wastewater comprises chemical wastewater and oily wastewater, the pretreatment device comprises a storage tank assembly, a coagulation air floatation assembly and a multi-element catalytic oxidation assembly which are sequentially communicated, the storage tank assembly comprises a plurality of wastewater storage tanks corresponding to various types of wastewater, the coagulation air floatation assembly comprises an oil wiper and a pressurized dissolved air floatation machine, the pressurized dissolved air floatation machine removes emulsified dissolved substances through pressurized gas, the oil wiper is arranged above the pressurized dissolved air floatation machine and is used for removing suspended substances in the wastewater, a catalytic cavity is arranged in the multi-element catalytic oxidation assembly, a plurality of types of catalytic oxidation components are arranged in the catalytic cavity, and organic pollutants of the multi-type wastewater are degraded through the action of the catalytic oxidation components in the catalytic cavity. The invention carries out classified collection and separate treatment on multi-class wastewater, and particularly realizes the rapid degradation of organic compounds through a plurality of types of catalytic oxidation components, thereby ensuring that the water quality at the tail end of the water outlet is in a continuous standard-reaching state.
In a first aspect, the invention provides a pretreatment device for multiple types of wastewater, wherein the multiple types of wastewater comprise chemical wastewater and oily wastewater, and the pretreatment device comprises a storage tank assembly, a coagulation air floatation assembly and a multi-element catalytic oxidation assembly which are sequentially communicated;
The storage tank assembly comprises a plurality of waste water storage tanks corresponding to various types of waste water, the coagulation air floatation assembly comprises an oil wiper and a pressurized dissolved air floatation machine, the pressurized dissolved air floatation machine removes emulsified dissolved substances through pressurized gas, and the oil wiper is arranged above the pressurized dissolved air floatation machine and is used for removing suspended substances in the waste water;
The multi-element catalytic oxidation assembly is internally provided with a catalytic cavity, a plurality of types of catalytic oxidation components are arranged in the catalytic cavity, and organic pollutants of the plurality of types of wastewater are degraded under the action of the catalytic oxidation components in the catalytic cavity.
Further, the coagulation air floatation assembly further comprises a flocculating agent dosing device and a sewage pump, wherein the flocculating agent dosing device is communicated with the pressurized dissolved air floatation machine, flocculating agents are added into the pressurized dissolved air floatation machine, and the sewage pump discharges waste gas in each waste water storage tank into the pressurized dissolved air floatation machine;
the pressurized dissolved air flotation machine comprises an air flotation tank, a dissolved air pump, a dissolved air tank, a releaser and an air compressor, wherein the dissolved air pump is communicated with the air flotation tank and the inlet end of the dissolved air tank and used for refluxing part of wastewater in the air flotation tank to the dissolved air tank, the air compressor is connected with the dissolved air tank and used for sending pressurized air into the dissolved air tank, and the releaser is communicated with the outlet end of the dissolved air tank and the air flotation tank and used for sending the pressurized wastewater back to the air flotation tank.
Further, the multi-element catalytic oxidation assembly comprises a wastewater treatment tank, an electrocatalytic component and a photocatalysis component, wherein the catalysis cavity is arranged in the wastewater treatment tank, the wastewater treatment tank further comprises a sewage bottom cavity and a water purification cavity, and the anode piece and the cathode piece of the electrocatalytic component and the photocatalysis component are arranged in the catalysis cavity.
Further, the cathode part of the electrocatalytic component is a metal net, the metal net comprises a first metal net and a second metal net, the first metal net and the second metal net are vertically arranged in the wastewater treatment tank, the first metal net is positioned below the second metal net, a sewage bottom cavity is arranged below the first metal net, a catalytic cavity is arranged between the first metal net and the second metal net, and a water purifying cavity is arranged above the second metal net;
the inner wall of the catalytic cavity is fixedly connected with a first bracket and a second bracket which are vertically arranged and insulated, and a plurality of groups of anode pieces of electrocatalytic components which are distributed in an angle manner are arranged between the first bracket and the second bracket;
The photocatalytic component comprises an ultraviolet luminous tube, a first layer of fixed blocks and a second layer of fixed blocks which are vertically arranged are arranged on the inner wall of the catalytic cavity, and a plurality of groups of ultraviolet luminous tubes which are distributed in an angle are arranged between the first layer of fixed blocks and the second layer of fixed blocks;
the distance between the first support and the second support is smaller than the distance between the first layer of fixed blocks and the second layer of fixed blocks.
Further, the lower surface of the wastewater treatment tank is also provided with a driving mechanism, the driving mechanism is in transmission connection with a first stirring blade, a second stirring blade and a turning auger, the first stirring blade, the second stirring blade and the turning auger are all arranged in the sewage bottom cavity, and the turning auger is arranged between the first stirring blade and the second stirring blade.
Further, the actuating mechanism includes fixed connection at the support of waste water treatment jar lower surface, driving motor and bearing frame, and driving motor's output shaft transmission is connected with the worm, and the one end and the bearing frame rotation of worm are connected, and worm drive is connected with the worm wheel, and worm wheel drive is connected with the drive shaft, and the lower extreme rotation of drive shaft is connected on the support.
Further, the inside of wastewater treatment jar still sets up first steady rest and second steady rest, and first steady rest sets up the upper surface at first metal mesh, and the second steady rest sets up the upper surface at the second metal mesh, and first steady rest and second steady rest run through the drive shaft in proper order.
Further, the upper end of the driving shaft sequentially penetrates through the wastewater treatment tank, the first stabilizing frame, the second stabilizing frame, the first metal net and the second metal net and is fixedly connected with a limiting block, the turning auger is fixedly connected to the lower end of the outer side of the driving shaft, and the first stirring blade and the second stirring blade are fixedly connected to the outer side of the driving shaft;
The outside fixed cover of drive shaft is equipped with first dirty pole and the dirty pole is scraped to the second, and the upper surface of first dirty pole of scraping is contradicted at the lower surface of first metal mesh, and the upper surface of second is scraped dirty pole and is contradicted at the lower surface of second metal mesh.
Further, the outer side of the wastewater treatment tank is sequentially communicated with a first sewage discharge pipe, a second sewage discharge pipe and a water purification pipe from bottom to top, a pressure gauge and an ORP meter are arranged on the outer side of the wastewater treatment tank, a water inlet pipe communicated with a sewage bottom cavity is inserted into the lower surface of the wastewater treatment tank, and a plurality of groups of supporting legs are arranged on the lower surface of the wastewater treatment tank in an array manner;
The upper surface of the wastewater treatment tank is also provided with a dosing mechanism, the dosing mechanism comprises a dosing bracket, a medicine storage tank and an air pump, the medicine storage tank is fixedly connected to the dosing bracket, the lower end of the medicine storage tank is communicated with a medicine outlet pipe, one end of the medicine outlet pipe is communicated with a medicine guide pipe, one end of the medicine guide pipe is communicated with a catalytic cavity, and an air outlet pipe of the air pump is communicated with the medicine guide pipe;
Be provided with first check valve on the outlet duct of air pump, the one end that the medicine pipe kept away from out the medicine pipe is provided with the second check valve, and the one end that goes out the medicine pipe is provided with flow control valve, and the outside upper end of medicine storage tank is provided with into the medicine pipe.
In a second aspect, the present invention also provides a pretreatment method for multi-type wastewater, which adopts the pretreatment device for multi-type wastewater, and specifically comprises the following steps:
s1, discharging various types of waste gas into corresponding waste water storage tanks;
s2, respectively enabling the wastewater of the wastewater storage tank to enter a coagulation air floatation assembly to remove emulsified dissolved substances and suspended substances;
And S3, enabling the wastewater after the coagulation air floatation assembly to enter a multi-element catalytic oxidation assembly, and degrading organic pollutants in a catalytic cavity under the action of various catalytic oxidation components.
The invention provides a pretreatment device and a pretreatment method for multi-type wastewater, which at least comprise the following beneficial effects:
(1) According to the invention, the multi-class wastewater is subjected to classified collection and separate treatment, and the rapid degradation of the organic compounds is realized through the catalytic oxidation components of various types, so that the water quality at the tail end of the water outlet is ensured to be in a continuous standard-reaching state.
(2) In the wastewater treatment tank in the multi-element catalytic oxidation assembly, the coupling mode of the electrocatalysis, the photocatalysis and the chemical catalysis improves the wastewater treatment efficiency, and the design of the electrocatalysis component, the photocatalysis component and the dosing mechanism is compact, the occupied space is smaller, and the equipment cost is reduced.
(3) In the wastewater treatment tank, the driving mechanism, the turning auger and the stirring blades are matched, the worm is driven by the driving motor to drive the worm wheel on the driving shaft to rotate, so that the driving shaft drives the turning auger and the stirring blades to stir wastewater in the wastewater bottom cavity, impurity deposition in the wastewater is avoided, the treatment effect on the wastewater is reduced, the mobility of the wastewater is improved, the catalytic oxidation efficiency of the wastewater is improved, and the first metal net, the second metal net, the first stabilizing frame, the second stabilizing frame, the first scraping rod and the second scraping rod are matched, and the driving shaft drives the scraping rod to scrape impurities attached to the first metal net and the second metal net, so that the impurities are prevented from blocking meshes, and the catalytic oxidation efficiency of the wastewater is improved.
Drawings
FIG. 1 is a diagram showing the whole structure of a pretreatment device for multi-type wastewater provided by the invention;
FIG. 2 is a schematic structural diagram of a coagulation air floatation assembly according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a wastewater treatment tank according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view showing the internal structure of a wastewater treatment tank according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the components in the catalytic chamber according to one embodiment of the present invention;
FIG. 6 is a schematic view of a medication administration mechanism according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a driving mechanism according to an embodiment of the present invention;
Fig. 8 is a schematic flow chart of a pretreatment method of multi-type wastewater provided by the invention.
Reference numerals illustrate:
1-storage tank assembly, 2-coagulation air floatation assembly, 21-oil wiper, 221-air floatation tank, 222-dissolved air water pump, 223-dissolved air tank, 224-releaser, 225-air compressor, 23-flocculant dosing equipment, 24-sewage pump, 3-multi-element catalytic oxidation assembly, 31-wastewater treatment tank, 311-catalytic cavity, 312-sewage bottom cavity, 3121-first stirring blade, 3122-second stirring blade, 3123-stirring auger, 313-water purifying cavity, 314-first support, 315-second support, 316-first layer fixing block, 318-first fixing frame, 319-second fixing frame, 321-anode piece, 3221-first metal mesh, 3222-second metal mesh, 331-ultraviolet luminotron, 34-actuating mechanism, 340-drive shaft, 3401-first scrape dirty pole, 3402-second scrape dirty pole, 341-support bracket, 342-actuating motor, 3421-output shaft, 3422-worm, 3423-worm wheel, 3424-stopper, 343-bearing frame, 35-first blow off pipe, 36-second blow off pipe, 37-water purification pipe, 38-dosing mechanism, 381-dosing bracket, 382-medicine storage tank, 3821-out medicine pipe, 3822-medicine guide pipe, 3823-medicine inlet pipe, 383-air pump, 3831-outlet pipe, 3832-first check valve, 3833-second check valve.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of additional like elements in a commodity or device comprising the element.
In the port and dock, the water coming from the wastewater treatment station is mainly acid-base wastewater, chemical wastewater and port ship washing water generated in a chemical storage tank area. The wastewater has the characteristics of complex water quality components, large water quality fluctuation, poor biodegradability of the wastewater, large oil content of the wastewater, high concentration of organic nitrogen and iron ions containing oil, high chromaticity of the wastewater, high turbidity and high concentration of suspended matters.
Therefore, the specific characteristics of the wastewater need to be considered, and an integrated treatment system capable of treating multiple types of wastewater needs to be designed. The multi-type wastewater treatment system can be used for carrying out classified collection so as to facilitate subsequent treatment, meanwhile, the classified collection can also be used for avoiding cross contamination of various types of wastewater, the classified collection can be firstly carried out with classified treatment and then concentrated treatment, for example, acid-base wastewater has low pollutant concentration but strong acidity and high chloride ion concentration, and can be close to the discharged water quality after being treated by an acid-base neutralization process, chemical wastewater is independently collected and prevented from being similar to oil-containing wastewater, and the oil-containing wastewater is firstly subjected to oil separation and air floatation pretreatment and enters oxidation pretreatment after being homogenized in uniform quantity, so that pollutants with high biological toxicity in the wastewater, such as benzene, toluene and the like, are removed, and the stable operation of a biochemical system is ensured.
As shown in FIG. 1, the invention provides a pretreatment device for multi-type wastewater, wherein the multi-type wastewater comprises chemical wastewater and oily wastewater, and the pretreatment device comprises a storage tank assembly 1, a coagulation air floatation assembly 2 and a multi-element catalytic oxidation assembly 3 which are sequentially communicated;
The storage tank assembly 1 comprises a plurality of waste water storage tanks corresponding to various types of waste water, the coagulation air floatation assembly 2 comprises an oil wiper 21 and a pressurized dissolved air floatation machine, the pressurized dissolved air floatation machine removes emulsified dissolved substances through pressurized gas, and the oil wiper 21 is arranged above the pressurized dissolved air floatation machine and is used for removing suspended substances in the waste water;
the multi-element catalytic oxidation assembly 3 is internally provided with a catalytic cavity 311, the catalytic cavity 311 is internally provided with a plurality of types of catalytic oxidation components, and organic pollutants of the plurality of types of wastewater are degraded under the action of the catalytic oxidation components in the catalytic cavity.
The invention carries out classified collection and separate treatment on multi-class wastewater, and particularly realizes the rapid degradation of organic compounds through a plurality of types of catalytic oxidation components, thereby ensuring that the water quality at the tail end of the water outlet is in a continuous standard-reaching state.
As shown in fig. 2, the coagulation air floatation assembly 2 further comprises a flocculating agent dosing device 23 and a sewage pump 24, wherein the flocculating agent dosing device 23 is communicated with the pressurized dissolved air floatation machine, flocculating agents are added into the pressurized dissolved air floatation machine, and the sewage pump 24 discharges waste gas in each waste water storage tank into the pressurized dissolved air floatation machine;
The pressurized dissolved air flotation machine comprises an air flotation tank 221, a dissolved air pump 222, a dissolved air tank 223, a releaser 224 and an air compressor 225, wherein the dissolved air pump 222 is communicated with the air flotation tank 221 and the inlet end of the dissolved air tank 223, and is used for refluxing part of wastewater in the air flotation tank 221 to the dissolved air tank 223, the air compressor 225 is connected with the dissolved air tank 223, pressurized air is sent into the dissolved air tank 223, the releaser 224 is communicated with the outlet end of the dissolved air tank 223 and the air flotation tank 221, and the pressurized wastewater is sent back to the air flotation tank 221.
The coagulation air floatation assembly generates a large amount of tiny bubbles in water in a pressurized air dissolution mode, the tiny bubbles are adhered to solid or liquid particles in the wastewater, the solid-liquid or liquid-liquid separation is realized by rising to the water surface by virtue of buoyancy, and the air floatation process can fully remove emulsified oil and dissolved oil in the wastewater.
The flocculant of the flocculant dosing equipment and the pressurized wastewater in the dissolved air tank are mixed in an air floatation tank, the pressure in the air floatation tank is reduced, supersaturated air is released, tiny bubbles are formed, the tiny bubbles are adhered to solid or liquid particles with the density close to that of water in the wastewater, an air floatation body with the density smaller than that of water is formed, and the air floatation body floats to the water surface under the buoyancy effect to carry out solid-liquid or liquid-liquid separation.
According to the characteristics that the wastewater contains more floating oil and dissolved oil, the coagulation air floatation assembly disclosed by the invention realizes the double lifting of the oil removal amount and reduces the treatment pressure of the rear-end multi-element catalytic oxidation assembly through strengthening the oil removal effect by coagulation air floatation.
As shown in fig. 3 to 7, the multi-element catalytic oxidation assembly 3 includes a wastewater treatment tank 31, an electrocatalytic element and a photocatalytic element, the catalytic chamber 311 is disposed inside the wastewater treatment tank 31, the wastewater treatment tank 31 further includes a sewage bottom chamber 312 and a water purification chamber 313, and the anode member 321 and the cathode member of the electrocatalytic element and the photocatalytic element are disposed in the catalytic chamber 311.
The cathode part of the electrocatalytic component is a metal mesh, the metal mesh comprises a first metal mesh 3221 and a second metal mesh 3222, the first metal mesh 3221 and the second metal mesh 3222 are vertically arranged in the wastewater treatment tank 31, the first metal mesh 3221 is located below the second metal mesh 3222, the lower part of the first metal mesh 3221 is a wastewater bottom cavity 312, a catalytic cavity 311 is arranged between the first metal mesh 3221 and the second metal mesh 3222, and the upper part of the second metal mesh 3222 is a water purification cavity 313.
The inner cavity of the wastewater treatment tank is divided into a sewage bottom cavity, a catalytic cavity and a water purifying cavity by a first metal net and a second metal net. The first metal net and the second metal net can not only play a role in screening suspended matters and floaters in the wastewater, but also play an electrocatalytic role as cathode parts.
The inner wall of the catalytic cavity 311 is fixedly connected with a first support 314 and a second support 315 which are vertically arranged and insulated, a plurality of groups of anode pieces 321 of electrocatalytic components which are distributed in an angle manner are arranged between the first support 314 and the second support 315, and the first support and the second support can be both hexagonal supports, and the anode pieces of the electrocatalytic components are fixedly connected between the upper hexagonal support and the lower hexagonal support.
The anode parts can be arranged in groups according to different application scene requirements, the anode parts in each group are circumferentially distributed at an angle in the catalytic cavity, the contact area with the wastewater in the catalytic cavity is increased, and the degradation effect on the wastewater is improved.
The anode member may be made of metal oxide (Ti oxide) or the like, and may exhibit good electrocatalytic activity and stability under oxygen evolution conditions. The metal mesh can be made of Ti. The electrocatalytic component is arranged to oxidize the wastewater, specifically, hydroxyl radicals are generated in the wastewater, and under the control of given reaction conditions and operation parameters, rapid chemical reactions, such as addition and substitution reactions, between the hydroxyl radicals and pollutant functional groups are induced, so that high-efficiency selective degradation of chromophoric groups such as C= C, C =O and aromatic hydrocarbons and heterocyclic highly toxic and difficult-to-biodegrade substances is realized.
The photocatalytic member comprises an ultraviolet light-emitting tube 331, a first layer of fixing blocks 316 and a second layer of fixing blocks (not shown in the figure) which are vertically arranged are arranged on the inner wall of the catalytic cavity 311, and a plurality of groups of ultraviolet light-emitting tubes 331 which are distributed in an angle manner are arranged between the first layer of fixing blocks 316 and the second layer of fixing blocks;
the spacing between the first support 314 and the second support 315 is smaller than the spacing between the first layer of fixed blocks 316 and the second layer of fixed blocks.
Ultraviolet luminotron is arranged between the first layer of fixed block and the second layer of fixed block, under the action of ultraviolet light, the direct photolysis and the indirect photolysis of pollutants in the wastewater occur, and the advanced treatment of pollutants in the wastewater is realized by coupling electro-catalysis.
The lower surface of the wastewater treatment tank 31 is further provided with a driving mechanism 34, the driving mechanism 34 is in transmission connection with a first stirring blade 3121, a second stirring blade 3122 and a stirring auger 3123, the first stirring blade 3121, the second stirring blade 3122 and the stirring auger 3123 are all arranged in the wastewater bottom cavity 312, and the stirring auger 3123 is arranged between the first stirring blade 3121 and the second stirring blade 3122.
The stirring blade and the turning auger are conveniently driven to rotate through the driving mechanism, so that the fluidity of the wastewater in the wastewater treatment tank is improved, and the problem of reduction in treatment effect due to wastewater deposition is avoided.
The driving mechanism 34 comprises a supporting bracket 341 fixedly connected to the lower surface of the wastewater treatment tank 31, a driving motor 342 and a bearing seat 343, an output shaft 3421 of the driving motor 342 is in transmission connection with a worm 3422, one end of the worm 3422 is in rotational connection with the bearing seat 343, the worm 3422 is in transmission connection with a worm wheel 3423, the worm wheel 3423 is in transmission connection with a driving shaft 340, and the lower end of the driving shaft 340 is in rotational connection with the supporting bracket 341.
The inside of the wastewater treatment tank 31 is further provided with a first stabilizing frame 318 and a second stabilizing frame 319, the first stabilizing frame 318 is arranged on the upper surface of the first metal net 3221, the second stabilizing frame 319 is arranged on the upper surface of the second metal net 3222, and the first stabilizing frame 318 and the second stabilizing frame 319 sequentially penetrate through the driving shaft 340.
The upper end of the driving shaft 340 sequentially penetrates through the wastewater treatment tank 31, the first stabilizing frame 318, the second stabilizing frame 319, the first metal mesh 3221 and the second metal mesh 3222 and is fixedly connected with a limiting block 3424, the turning auger 3123 is fixedly connected to the lower end of the outer side of the driving shaft 340, and the first stirring blade 3121 and the second stirring blade 3122 are fixedly connected to the outer side of the driving shaft 340;
The stability when drive shaft rotation has been improved to first firm frame, second firm frame, and guarantee stirring vane, stirring auger agitate the high efficiency of waste water. The stability of first metal mesh, second metal mesh has been improved to first firm frame, second firm frame, avoids first metal mesh, second metal mesh to take place deformation in the use, influences waste water treatment's efficiency.
The outside fixed cover of drive shaft 340 is equipped with first dirt bar 3401 and second dirt bar 3402, and the upper surface of first dirt bar 3401 is contradicted at the lower surface of first metal wire 3221, and the upper surface of second dirt bar 3402 is contradicted at the lower surface of second metal wire 3222.
The first dirt scraping rod and the second dirt scraping rod which are sleeved on the outer side of the driving shaft drive the first dirt scraping rod and the second dirt scraping rod to clean suspended matters and impurities on the surfaces of the first metal net and the second metal net through rotation of the driving shaft, so that the first metal net and the second metal net are prevented from being blocked, and the treatment efficiency of wastewater is affected.
The outer side of the wastewater treatment tank 31 is sequentially communicated with a first sewage discharge pipe 35, a second sewage discharge pipe 36 and a water purifying pipe 37 from bottom to top, a pressure gauge and an ORP meter are arranged on the outer side of the wastewater treatment tank 31, a water inlet pipe communicated with a sewage bottom cavity is inserted into the lower surface of the wastewater treatment tank, and a plurality of groups of supporting legs are arranged on the lower surface of the wastewater treatment tank in an array manner;
the upper surface of wastewater treatment jar 31 still is provided with medicine dosing mechanism 38, and medicine dosing mechanism 38 includes medicine dosing bracket 381, medicine storage jar 382 and air pump 383, and medicine storage jar 382 fixed connection is on medicine dosing bracket 381, and the lower extreme intercommunication of medicine storage jar 382 has out medicine pipe 3821, and the one end intercommunication of going out medicine pipe 3821 has medicine guide pipe 3822, and medicine guide pipe 3822's one end is linked together with catalytic cavity 311, and air pump 383's outlet duct 3831 is linked together with medicine guide pipe 3822.
The catalyst is conveniently introduced into the catalytic cavity through the air pump, so that the catalysis of pollutants in the wastewater is facilitated, and the degradation effect of the wastewater is improved.
The air outlet pipe 3831 of the air pump 383 is provided with a first one-way valve 3832, one end of the medicine guide tube 3822, which is far away from the medicine outlet tube 3821, is provided with a second one-way valve 3833, one end of the medicine outlet tube 3821 is provided with a flow control valve, and the upper end of the outer side of the medicine storage tank 382 is provided with a medicine inlet tube 3823.
The first one-way valve and the second one-way valve are arranged, so that the backflow of wastewater can be avoided, the backflow of the catalyst can be avoided, and the throwing efficiency of the catalyst is improved. The liquid level sensor can be arranged in the medicine storage tank, and the capacity of the catalyst is monitored, so that capacity signals can be transmitted to the control end, and the catalyst can be filled in the medicine storage tank.
After the wastewater enters the multi-element catalytic oxidation assembly through the water inlet pipe, the wastewater firstly occupies the sewage bottom cavity in the wastewater treatment tank, sequentially flows into the catalytic cavity and the water purification cavity, and finally is discharged through the water purification pipe to enter the next working procedure.
The waste water is degraded in the waste water treatment tank, which comprises a driving motor driving a worm and a worm wheel to rotate, so that a driving shaft drives a turning auger and a stirring blade to stir the waste water in the waste water bottom cavity, the fluidity of the waste water is maintained, and when the waste water enters the catalytic cavity through the second metal net, a part of suspended matters are filtered.
In the catalytic cavity, refractory organic matters and poison contained in the wastewater are coupled and treated in three ways, wherein the ultraviolet rays generated by a plurality of groups of ultraviolet luminous tubes irradiate the wastewater to decompose the organic matters in the wastewater, the electrocatalytic component performs electrolytic operation to generate hydroxyl free radicals, and performs secondary degradation on the organic matters in the wastewater through the strong oxidization function of the hydroxyl free radicals, and the pressure of a medicine guide pipe is increased through an air pump to press a catalyst in a medicine storage tank into a wastewater treatment tank, so that the catalyst enters the catalytic cavity to perform catalytic action on the degradation of the organic matters in the wastewater. In the catalytic cavity, the coupling mode of electrocatalysis, photocatalysis and chemical catalysis improves the efficiency of wastewater treatment, and the design of the electrocatalysis component, the photocatalysis component and the dosing mechanism is compact, the occupied space is smaller, and the equipment cost is reduced.
As shown in fig. 8, the present invention further provides a pretreatment method for multi-type wastewater, which adopts the pretreatment device for multi-type wastewater, and specifically comprises the following steps:
s1, discharging various types of waste gas into corresponding waste water storage tanks;
s2, respectively enabling the wastewater of the wastewater storage tank to enter a coagulation air floatation assembly to remove emulsified dissolved substances and suspended substances;
And S3, enabling the wastewater after the coagulation air floatation assembly to enter a multi-element catalytic oxidation assembly, and degrading organic pollutants in a catalytic cavity under the action of various catalytic oxidation components.
The invention provides a pretreatment device and a pretreatment method for multi-type wastewater, which at least comprise the following beneficial effects:
(1) According to the invention, the multi-class wastewater is subjected to classified collection and separate treatment, and the rapid degradation of the organic compounds is realized through the catalytic oxidation components of various types, so that the water quality at the tail end of the water outlet is ensured to be in a continuous standard-reaching state.
(2) In the wastewater treatment tank in the multi-element catalytic oxidation assembly, the coupling mode of the electrocatalysis, the photocatalysis and the chemical catalysis improves the wastewater treatment efficiency, and the design of the electrocatalysis component, the photocatalysis component and the dosing mechanism is compact, the occupied space is smaller, and the equipment cost is reduced.
(3) In the wastewater treatment tank, the driving mechanism, the turning auger and the stirring blades are matched, the worm is driven by the driving motor to drive the worm wheel on the driving shaft to rotate, so that the driving shaft drives the turning auger and the stirring blades to stir wastewater in the wastewater bottom cavity, impurity deposition in the wastewater is avoided, the treatment effect on the wastewater is reduced, the mobility of the wastewater is improved, the catalytic oxidation efficiency of the wastewater is improved, and the first metal net, the second metal net, the first stabilizing frame, the second stabilizing frame, the first scraping rod and the second scraping rod are matched, and the driving shaft drives the scraping rod to scrape impurities attached to the first metal net and the second metal net, so that the impurities are prevented from blocking meshes, and the catalytic oxidation efficiency of the wastewater is improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
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| JP2000234191A (en) * | 1999-02-10 | 2000-08-29 | Kobe Steel Ltd | Ozone water generator |
| CN206927669U (en) * | 2017-03-29 | 2018-01-26 | 沧州信昌化工股份有限公司 | Multifunctional waste water processing equipment |
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| CN100453472C (en) * | 2004-12-15 | 2009-01-21 | 中国科学院生态环境研究中心 | A method and device for efficiently removing organic matter in water using photoelectric Fenton reaction |
| CN103668305B (en) * | 2014-01-02 | 2016-03-23 | 哈尔滨工业大学 | A deflector type microbial electrolytic cell with a built-in multi-electrode system and its application method |
| CN104710063B (en) * | 2015-03-09 | 2016-08-17 | 中国海洋石油总公司 | High salt contains photoelectrocatalysis/Fenton coupled processing system and the processing method of poly-waste water |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000234191A (en) * | 1999-02-10 | 2000-08-29 | Kobe Steel Ltd | Ozone water generator |
| CN206927669U (en) * | 2017-03-29 | 2018-01-26 | 沧州信昌化工股份有限公司 | Multifunctional waste water processing equipment |
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