CN110885151A - Waste water treatment device - Google Patents
Waste water treatment device Download PDFInfo
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- CN110885151A CN110885151A CN201910904686.XA CN201910904686A CN110885151A CN 110885151 A CN110885151 A CN 110885151A CN 201910904686 A CN201910904686 A CN 201910904686A CN 110885151 A CN110885151 A CN 110885151A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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Abstract
The invention discloses a wastewater treatment device, which comprises an electric flocculation system, an electric floatation system and an electric catalytic oxidation system. The electric flocculation system comprises an electric flocculation container and an electric flocculation electrode unit, wherein the electric flocculation electrode unit is arranged in the electric flocculation container; the electric floatation system comprises an electric floatation container and a micro-bubble electric generation device, wherein the micro-bubble electric generation device comprises an air floatation electrode unit which is arranged in the electric floatation container and immersed in water in the electric floatation container, the air floatation electrode unit is used for separating gas by electric energy, and the gas floats upwards to form micro-bubbles; the electrocatalytic oxidation system comprises an electrooxidation container and an oxidation electrode unit, wherein the oxidation electrode unit is connected with the electrooxidation container; the electric flocculation container, the electric floatation container and the electric oxidation container are sequentially communicated. It has the following advantages: the electric air flotation, the electric flocculation and the electric catalytic oxidation are adopted as the core, and the wastewater is degraded into the clean water which meets the discharge standard and can be discharged or recycled and a small amount of non-hazardous waste residue (about five per thousand) so as to realize the aim of environmental protection treatment.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a wastewater treatment device.
Background
The existing waste water comprises: waste emulsion, waste cutting fluid, black and odorous water, pesticide chemical wastewater and the like.
In the metal processing process, a large amount of emulsion or cutting fluid is required to be prepared in the processing such as rolling and pressing of metal plates and strips or cutting of metal machining accessories, the emulsion or the cutting fluid has the cooling and lubricating effects, but the emulsion or the cutting fluid can age in the processing process, can generate complex deterioration reaction and lose efficacy and is discarded, the oil content of the discarded emulsion or the cutting fluid is high, the metal-containing powder is high, the organic solvent-containing emulsifier is high, the chemical oxygen demand is generally up to 5-20 ten thousand mg/l, and the oil and the water are in an emulsified state, so the processing difficulty is high.
The traditional method adopts a strong acid demulsification method or a distillation concentration method for treatment, but the traditional method obviously has the following defects: firstly, a strong acid demulsification method is used, although the method can realize oil-water demulsification and oil-water separation, the emulsifier in the emulsion cannot be degraded and removed, other equipment needs to be added for advanced treatment, and the subsequent treatment is brought by the polycondensation reaction which is easy to occur to the organic solvent in the waste emulsion after the acid (sulfuric acid) demulsification; and secondly, by using a distillation concentration method, the concentrated solution generated by distillation concentration generally accounts for about 15 percent of the total amount, the concentrated solution has high oil content and high organic solvent content, and reacts to generate oily dangerous waste, the waste concentrated solution is almost difficult to treat except for high-temperature incineration, and the high-temperature incineration easily generates harmful gases such as dioxin, benzene and the like to cause air pollution. The traditional method can not solve the problem fundamentally, or the problem which is difficult to solve because the gas process is required to be deeply processed to meet the emission requirement, or the generated hazardous waste can not be processed.
Black and odorous water is a necessary phenomenon generated in economic development, is commonly present in developing cities, towns and villages, and has the following industrial reasons: firstly, the human-living domestic sewage lacks of treatment facilities or collection channels, the population is dense, and the construction facilities cannot be matched with each other, so that the sewage is directly discharged into rivers, channels, ditches or ponds, and the water pollutants in the ditches and the rivers of the ponds and the ditches are accumulated and blacked and smelly under the action of microorganisms; secondly, the water level of the canal at a special geographical position is lower than the level of the river, the lake and the sea to which the water flows, so that the sewage of the canal and the river cannot flow, the self-oxidation capability of the sewage disappears, and blackening and smelliness are caused. For example, black odorous water is easily formed in town groups on both sides of the yellow river, and black odorous water is also easily formed in coastal city groups.
The currently adopted method and means for eliminating black and odorous water are not limited to two types: firstly, dredging and secondly, reforming a river channel. The desilting is a temporary emergency means for temporary treatment, and only plays a temporary emergency role because the pollutants flow into the water body under the action of microorganisms and still cause sludge accumulation and blackening and smelling of the water body as long as the pollutants in the water are not removed. The river channel reconstruction comprises river channel greening and river channel reconstruction, and ecological biodegradation facilities are implanted in the river channel, so that the river channel reconstruction is feasible, however, as long as the river channel and the ditch are dense in both banks, messy in building, narrow in river channel, and free of more available space ground, the reconstruction is difficult, and a black and odorous water body can be formed, so that the method is often used for eliminating the problem that the engineering of the black and odorous water body is too long in time, common towns are difficult to bear and cannot be implemented, and if the method is implemented reluctantly, the false engineering situation that the river channel passes through a field and needs to be checked is easily realized. Therefore, a device which has no secondary pollution harm to the water body, occupies less land and does not need to transform river and canal facilities on a large scale is urgently needed to rapidly solve the problem of pollution of the black and odorous water body and eliminate the inconvenience in life caused by the black and odorous water body to surrounding residents.
The pesticide chemical industry generates a lot of waste water containing terminal pesticide components or intermediates in the process of manufacturing pesticides, the waste water generally has the characteristics of high salt content (up to hundred thousand PPM level), high chemical oxygen demand (ninety thousand PPM level), high nitrogen content (up to 5 ten thousand PPM level), and high content of substances which are toxic to organisms, such as bigmei, pymetrozine, chlordane, furan …, is remained. The wastewater has high toxicity, high salt content and strong acid-base value (generally strong acid and strong base), so the wastewater is difficult to treat by adopting the traditional method. The traditional method comprises the following steps: the biochemical method has extremely poor implementation effect because bacteria cannot be cultured in the wastewater; the membrane method concentration is difficult to perform due to the characteristics of strong acid, strong base and high salt, and even if the concentrated solution is concentrated, the concentrated solution cannot be treated. Under the situation of anew, the waste water is generally treated only by adopting a high-temperature incineration method, but the waste water has complex components, the incineration tail gas components generated by the high-temperature incineration are unknown, and the risk of air pollution exists, so the waste water is limited and carefully used.
Disclosure of Invention
The present invention provides a wastewater treatment apparatus which overcomes the disadvantages of wastewater treatment in the background art.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a wastewater treatment plant comprising:
the electric flocculation system comprises an electric flocculation container and an electric flocculation electrode unit, wherein the electric flocculation electrode unit is arranged in the electric flocculation container;
the electric floatation system comprises an electric floatation container and a micro-bubble electric generation device, wherein the micro-bubble electric generation device comprises an air floatation electrode unit which is arranged in the electric floatation container and immersed in water in the electric floatation container, and the air floatation electrode unit can obtain electric energy to separate out gas, and the gas floats upwards to form micro-bubbles;
the electrocatalytic oxidation system comprises an electrooxidation container and an oxidation electrode unit, wherein the oxidation electrode unit is connected to the electrooxidation container;
the electric flocculation electrode unit, the air floatation electrode unit and the oxidation electrode unit can be electrically connected with a power supply, and the electric flocculation container, the electric floatation container and the electric oxidation container are sequentially connected.
In one embodiment: and a physicochemical container of a physicochemical flocculation system is arranged between the electric floating container and the electric oxidation container and behind the electric oxidation container, and the physicochemical flocculation system also comprises a dosing system device which is matched with the physicochemical container to add at least one of a flocculating agent and an oxidant into the physicochemical container.
In one embodiment: further comprising:
a water pump mechanism; and
an electro-reduction system comprising an electro-reduction vessel and a reduction electrode unit capable of being electrically connected to a power source, the reduction electrode unit being immersed in water in the electro-reduction vessel; the electroreduction electrode unit comprises a second positive electrode, a second negative electrode and an insulating and corrosion-resistant mesh, wherein the second positive electrode comprises an electrode stack formed by stacking particles containing carbon materials, the second negative electrode is arranged in the mesh, and the particle size and the mesh size of the mesh meet the condition that the particles cannot enter the mesh;
the water pump mechanism, the electric flocculation container, the electric reduction container, the electric floatation container and the electric oxidation container are sequentially communicated.
In one embodiment: a materialization container of a materialization flocculation system is arranged behind the electrooxidation container, and the materialization flocculation system also comprises a medicine adding system device which is matched with the materialization container to add at least one of a flocculating agent and an oxidizing agent into the materialization container.
In one embodiment: the device also comprises a filtering membrane system, and the filtering membrane system is connected with the water outlet of the materialization container.
In one embodiment: further comprising:
an electro-reduction system comprising an electro-reduction vessel and a reduction electrode unit capable of being electrically connected to a power source, the reduction electrode unit being immersed in water in the electro-reduction vessel; the electroreduction electrode unit comprises a second positive electrode, a second negative electrode and an insulating and corrosion-resistant mesh, wherein the second positive electrode comprises an electrode stack formed by stacking particles containing carbon materials, the second negative electrode is arranged in the mesh, and the particle size and the mesh size of the mesh meet the condition that the particles cannot enter the mesh;
the electric adsorption system comprises an electric adsorption container and an electric adsorption electrode unit capable of electrically connecting with a power supply, wherein the electric adsorption container is provided with an electric adsorption water inlet, a treated water outlet and a sewage outlet, the adsorption electrode unit comprises a first adsorption type electrode, a second adsorption type electrode and a non-adsorption type electrode, the power supply electrically connects the adsorption electrode unit to provide electric energy for the adsorption electrode unit, the adsorption electrode unit is electrified to enable the first adsorption type electrode and the second adsorption type electrode to adsorb impurities in water flowing through the adsorption electrode unit and flow out from the treated water outlet, the electrode direction is changed to enable the adsorption electrode unit to remove adsorption, and the adsorbed impurities are removed by water and flow out from the sewage outlet;
the electric flocculation container, the electric reduction container, the electric floating container, the electric oxidation container and the electric adsorption container are sequentially communicated.
In one embodiment: and physicochemical containers of a physicochemical flocculation system are arranged between the electric flocculation container and the electric reduction container, between the electric reduction container and the electric floating container and between the electric floating container and the electric oxidation container, and the physicochemical flocculation system also comprises a dosing system device which is matched with the physicochemical container so as to be capable of adding at least one of a flocculating agent and an oxidizing agent into the physicochemical container.
In one embodiment: the device also comprises a filtering membrane system, and the filtering membrane system is connected with the water outlet of the electric adsorption container.
In one embodiment: the electric flocculation electrode unit comprises two electrode baskets made of insoluble metal materials, wherein meshes are formed in the electrode baskets, and the electrode baskets are used for placing electrode particles capable of being electrolyzed into electrode ions; the electric air floatation system also comprises a floating-assisting air microbubble generator, the floating-assisting air microbubble generator comprises an air pump, an air pipe and an air outlet nozzle which is arranged in the electric air floatation container and immersed in the water in the electric air floatation container, the air pipe is communicated with the air pump and the air outlet nozzle, the air outlet nozzle discharges air by starting the air pump, and the air floats upwards to form microbubbles; the air floatation electrode unit comprises a second positive electrode and a second negative electrode; the oxidation electrode unit comprises a plurality of first positive electrodes and a plurality of first negative electrodes which are arranged in an equal number and are uniformly spaced and staggered mode.
In one embodiment: the particles comprise at least one of carbon or graphite particles; the second negative electrode adopts a stable electrode of iron, carbon, magnesium, copper, aluminum, nickel or titanium with the oxidized outer surface; the mesh fabric material is nylon, terylene or polyurethane fiber mesh fabric.
Compared with the background technology, the technical scheme has the following advantages:
the electric air flotation, the electric flocculation and the electric catalytic oxidation are adopted as the core, and the wastewater is degraded into the clean water which meets the discharge standard and can be discharged or recycled and a small amount of non-hazardous waste residue (about five per thousand) so as to realize the aim of environmental protection treatment.
Drawings
The invention is further described with reference to the following figures and detailed description.
FIG. 1 is a schematic view showing the structure of a waste emulsion and waste cutting fluid treatment apparatus according to the first embodiment.
FIG. 2 is a schematic structural view of an electrocatalytic oxidation system according to the first embodiment.
Fig. 3 is a schematic structural view of the black odorous water body eliminating device of the second embodiment.
Fig. 4 is a schematic structural view of an electrical reduction system according to a second embodiment.
FIG. 5 is a schematic view showing the structure of a treatment apparatus for agricultural chemical wastewater according to the third embodiment.
Detailed Description
Example one
Referring to fig. 1, the waste emulsion and waste cutting fluid treatment apparatus includes a water pump mechanism 1, an electric flocculation system 2, an electric floatation system 3, an electrocatalytic oxidation system 4, and a power supply 5.
The electric flocculation system 2 comprises an electric flocculation container and an electric flocculation electrode unit, wherein the electric flocculation electrode unit is arranged in water in the electric flocculation container. As described in CN 201010563661, the electric flocculation electrode unit includes two electrode baskets made of insoluble metal material, wherein the electrode baskets are provided with meshes, and the electrode baskets are used for holding electrode particles capable of being electrolyzed into electrode ions. The two electrode baskets are electrically connected with a power supply, the electrode baskets of the electric flocculation electrode device obtain electric energy, OH ions are electrolyzed out from water, electrode particles are electrolyzed into electrode ions, the OH ions and the electrodes are ionized to synthesize a flocculating agent, and the flocculating agent and liquid are subjected to flocculation reaction to flocculate harmful substances in the sewage into flocs so as to be precipitated for treatment.
The electro-flotation system 3 includes an electro-flotation container, a micro-bubble electricity generating device, and a floating-assisted air micro-bubble generator, as described in CN 201620716221.3. The microbubble electrical generation device comprises an air floatation electrode unit which is arranged in the electric floatation container and is immersed in water in the electric floatation container, the air floatation electrode unit comprises a third positive electrode and a third negative electrode, the power supply is electrically connected with the third positive electrode and the third negative electrode, the air floatation electrode unit obtains electric energy to separate out gas, and the gas floats upwards to form microbubbles; the floating-assisted air microbubble generator comprises an air pump, an air pipe and an air outlet nozzle which is arranged in an electric air floatation container and immersed in water in the electric air floatation container, wherein the air pipe is communicated with the air pump and the air outlet nozzle, the air outlet nozzle discharges air when the air pump is started, and the air floats to form microbubbles.
Referring to fig. 2, the electrocatalytic oxidation system 4 includes an electrooxidation vessel 41 and an oxidation electrode unit attached to the electrooxidation vessel 41 and including a plurality of second positive electrodes 42 and a plurality of second negative electrodes 43 arranged in an equal number and evenly spaced-apart staggered arrangement. Technical content as described in CN 201010563708: zeolite particles are added in the water in the electrooxidation container 41 to be used as a third electrode; the oxidation electrode unit further comprises a positive conducting rod 44, a negative conducting rod 45, a positive conducting aid 46 with the same number as the second positive electrode 42 and a negative conducting aid 47 with the same number as the second negative electrode 43; each of the second positive electrode 42 and the second negative electrode 43 is provided with two through holes, and an insulating sleeve is sleeved in each through hole; the second insulating sleeves of the second positive electrode 42 and the second negative electrode 43 are respectively sleeved on the positive conducting rod and the negative conducting rod; the positive conduction aids are sleeved on the positive conducting rods in a conducting manner and are respectively in conducting and abutting joint with the first positive electrodes, and the negative conduction aids are sleeved on the negative conducting rods in a conducting manner and are respectively in conducting and abutting joint with the first negative electrodes; the power supply 9 is electrically connected to the positive and negative conductive rods.
A physicochemical container of a physicochemical flocculation system 6 is arranged between the electric flotation container and the electric oxidation container 41 and behind the electric oxidation container, the physicochemical flocculation system also comprises a drug adding system device, the drug adding system device is matched with the physicochemical container to add at least one of a flocculating agent and an oxidizing agent into the physicochemical container, and the flocculating agent and the oxidizing agent are PAF (polymeric ferric silicate flocculating agent) or PAM (polyacrylamide). The chemical adding system device comprises a chemical adding container, wherein the chemical adding container is fixed relative to the physicochemical container and is positioned above the physicochemical container, a chemical outlet positioned right above the physicochemical container is formed in the bottom of the chemical adding container, a control valve is arranged at the chemical outlet, the control valve is an electromagnetic valve, the electronic control system is electrically connected with the electromagnetic valve to control the opening or closing of the chemical adding container so as to control the chemical adding, a water solution prepared from PAF (polymeric ferric silicate flocculant) and PAM (polyacrylamide) is added into garbage percolate, a compression double electric layer can be generated, suspended particles in the garbage percolate lose stability, the particles are mutually condensed to increase to form floccules and alumen ustum, and a large amount of suspended substances in the wastewater are removed through a bag filter after the floccules grow to a certain volume.
The device also comprises a curing device 7 according to the requirement, and the curing device 7 is connected with the materialization container to cure the sediment of the materialization container to realize resource utilization. The solidification device comprises a sludge concentration place connected with the materialization container and a sludge filter press connected with the sludge concentration place; the upper clear liquid flowing from the surface layer of the materialization container flows into the next-stage electrochemical reaction core for degradation or filtration membrane system 8, and further flows through the next container after passing through the bag filter; pumping the precipitate from the physical and chemical container to a sludge concentration place, and concentrating and fully precipitating the precipitate in the sludge concentration place; the sludge filter press filters sludge taken out from the sludge concentration area, and the sludge is filter-pressed into a sludge cake. The curing device 7 further comprises a drying system for drying the mudcake.
And the device also comprises a filtering membrane system 8 which is connected with the water outlet of the last materialization container so as to treat water again.
The water pump mechanism 1 comprises a water pump and a pipeline, the electric flocculation container is communicated with the pipeline, the electric floatation container is communicated with the electric flocculation container, the first materialization container is communicated with the electric floatation container, the electric oxidation container is communicated with the first materialization container, the second materialization container is communicated with the electric oxidation container, and therefore water can be treated by the water pump mechanism sequentially through the electric flocculation container, the electric floatation container, the first materialization container, the electric oxidation container, the second materialization container and the filtering membrane system 8.
The electric flocculation system is used for fully oxidizing organic solvent in waste emulsion or waste cutting fluid, carrying out coagulation reaction with electrode substances to generate precipitable substances, and then entering a subsequent auxiliary physicochemical flocculation and precipitation system to generate floc precipitation under the action of a chemical flocculant. The electrocatalytic oxidation reaction system is used for further breaking the macromolecular strong oxidation action of the primarily clarified treated water so as to meet the discharge requirement of general industrial wastewater. The membrane treatment system is selected as a standby process or equipment for saving the operation cost according to the water outlet requirement.
The method adopts the process principle of electro-flotation, electro-flocculation and electro-catalytic oxidation as the core, and the membrane filtration treatment is matched with the physical and chemical flocculation precipitation treatment to degrade the waste emulsion or the waste cutting fluid into the clear water which meets the discharge standard and can be discharged or recycled and a small amount of non-hazardous waste residues (about five per thousand), so that the method can be widely applied to the treatment of the hot emulsion waste of the aluminum plate strip, or the treatment of the cold emulsion waste of the steel plate strip, or the treatment of the cutting cooling and lubricating emulsion in the metal processing industry, the mechanical processing industry and the machine tool processing, and the like. Moreover, the equipment cost is low, the running automation program is higher, and the running cost is only one half of that of the traditional method.
Example two
Referring to fig. 3 and 4, the black and odorous water eliminating device includes a water pump mechanism 1, an electric flocculation system 2, an electric reduction system 9, an electric floatation system 3, an electric catalytic oxidation system 4, a physicochemical flocculation system 6, a solidification device 7 and a power supply 5.
The water pump mechanism 1, the electric flocculation system 2, the electric floatation system 3, the electric catalytic oxidation system 4, the physicochemical flocculation system 6 and the curing device 7 are as described in the first embodiment.
The electroreduction system 9 comprises an electroreduction vessel 91 and a reduction electrode unit immersed in the water in the electroreduction vessel 91; the electroreduction electrode unit comprises a second positive electrode 92, a second negative electrode 93 and an insulating and corrosion-resistant mesh 94, the second positive electrode 92 comprises an electrode stack formed by stacking particles comprising a carbon material, the second negative electrode 93 is arranged in the mesh 94, and the particle size and mesh size of the mesh meet the condition that the particles cannot enter the mesh. The second positive electrode comprises an electrode stack formed by stacking particles of carbon materials, the particles are carbon particles or graphite particles, the electrode oxidation and reduction effects are good, and the nitrogen removal effect is better. The particles are cylinders, the diameter of each cylinder is 1-100 mm, the length of each cylinder is equal to the diameter of each cylinder, further, if 5-10 mm is selected, the structure is adopted, production and stacking are convenient, and the selection of the size is convenient for production and stacking and can generate a large surface area ratio. The second negative electrode is a stable electrode of iron, carbon, magnesium, copper, aluminum, nickel or titanium with the oxidized outer surface, and can be in a plate shape, a screen plate shape or other shapes. The mesh fabric material selects nylon, dacron or polyurethane fiber mesh fabric, the negative electrode is installed in the mesh fabric, just particle size and mesh size of the mesh fabric accord with the condition that the particles can not enter the mesh fabric. The second negative electrode is wrapped by the mesh cloth and inserted into the electrode stack, and through the design, the direct electrical connection of the two electrodes can be avoided, the number of particles can be increased, the redox effect is improved, and the nitrogen removal effect is improved. The power supply is electrically connected with the second positive electrode and the second negative electrode, the electrode unit is powered on, particles in the electrode stack are in a dotted semi-conductive state so that the particles form granular self-reaction electrodes, one end of each self-reaction electrode is a positive electrode, the other end of each self-reaction electrode is a negative electrode, one end of each self-reaction electrode is subjected to oxidation, the other end of each self-reaction electrode is subjected to reduction, the oxidation is carried out on the nitrified compounds in the water, the nitrogen is reduced into nitrogen, the nitrogen is removed from the water through the reduction, and the nitrogen returns to the atmosphere. In this embodiment, since the particles (granular self-reacting electrodes) of the electrode stack have a large specific surface area, the micro-electrolysis reactor assembly with low voltage and low current is formed by the large specific surface area, one end of the electrode of the stack is oxidized, and the other end of the electrode of the stack is reduced, so as to form an electro-oxidation-reduction system with high efficiency and low energy consumption, thereby improving the efficiency of reducing nitrogen element into nitrogen gas.
According to the requirement, the system also comprises an electric control technology which is connected with the electric flocculation system 2, the electric reduction system 9, the electric floatation system 3, the electric catalytic oxidation system 4, the physicochemical flocculation system 6 and the water pump. The electrocoagulation vessel 2 is preceded by a monitoring device 21.
In this embodiment, the electric flocculation system 2, the electric reduction system 9, the electric floatation system 3, the electric catalytic oxidation system 4, the physicochemical flocculation system 6 and the solidification device 7 are installed on (in) a van-type or platform-type frame, the number, the power and the reaction time of the devices can be adjusted according to different specific conditions of the black and odorous water body, the devices are reasonably configured by manual analysis through a pump system and an electric quantity system automatic control system, then the devices are automatically controlled by an electric control system, and as required, a sewage online monitoring device can be installed at a first water inlet to acquire data of the black and odorous water, and the parameters of reactors can be automatically skipped according to the acquired data to achieve the purpose of eliminating and degrading the black and odorous water.
In the device for eliminating the black and odorous water, electrode change is skillfully utilized to degrade or transfer sludge aiming at water pollutants in the black and odorous water, so that the black and odorous water is clarified and deodorized, pollution indexes are greatly reduced, the occupied area is small, the effect is quick, the investment is saved, and the black and odorous water can be eliminated and treated before large-scale urban transformation; the embodiment has the advantages that the river channel and the residential area construction for sewage drainage are not required to be transformed on a large scale, the ecological digestion facility for sewage with huge land occupation is not required to be reconstructed, the black and odorous substances are directly degraded and eliminated only by the device, and the effects and effects of instant effect, low cost and convenient implementation can be achieved.
EXAMPLE III
The treatment device for treating pesticide chemical wastewater comprises an electric flocculation system 2, an electric reduction system 9, an electric floatation system 3, an electric catalytic oxidation system 4, an electric adsorption system 10, a filtering membrane system 8 and a power supply 5.
The electric flocculation system 2, the electric reduction system 9, the electric floatation system 3 and the electric catalytic oxidation system 4 are as described in the first embodiment or the second embodiment.
The electro-adsorption system 10 includes an electro-adsorption container and an adsorption electrode unit, as the technical content recorded in 201720538753.7, the electro-adsorption container is provided with an electro-adsorption water inlet, a treated water outlet and a sewage outlet, the adsorption electrode unit includes a first adsorption type electrode, a second adsorption type electrode and a non-adsorption type electrode, the power supply electrically connects the adsorption electrode unit to provide electric energy for the adsorption electrode unit, the adsorption electrode unit is powered on to enable the first adsorption type electrode and the second adsorption type electrode to adsorb impurities in water flowing through the adsorption electrode unit and flow out from the treated water outlet, the polarity is changed to enable the adsorption electrode unit to remove adsorption, and the removed adsorbed impurities are taken away by water and flow out from the sewage outlet; the first adsorption type electrode and the second adsorption type electrode are provided with a plurality of through holes, the surface area of the electrodes is increased by adopting a porous structure, the first adsorption type electrode and the second adsorption type electrode are arranged at intervals along a first direction in a staggered array mode, and the non-adsorption type electrode is arranged along the first direction. The filtering membrane system is connected with a treated water outlet of the electric adsorption container.
The distillation desalting system comprises a heater and a distillation container, wherein the heater heats the distillation container, the distillation container is connected with a concentrated solution outlet of the filter membrane system, and water is distilled by heating to obtain residual salt.
And physicochemical containers of a physicochemical flocculation system are arranged between the electric flocculation container and the electric reduction container, between the electric reduction container and the electric floating container and between the electric floating container and the electric oxidation container, and the physicochemical flocculation system also comprises a dosing system device which is matched with the physicochemical container so as to be capable of adding at least one of a flocculating agent and an oxidizing agent into the physicochemical container. The materialized flocculation system is as described in example one or example two. The solidification device is also connected with a materialization container, an electric flocculation system and a distillation desalination system.
The device of this embodiment is arranged in degrading high salt content, high nitrogenous, the high toxicity waste water that produces in the pesticide chemical industry enterprise production process, adopts electrocatalytic oxidation, electric flocculation, electroreduction, electric air supporting, electrosorption etc. in the electrochemistry, removes nitrogen from pesticide chemical waste water, breaks the macromolecular chain, and the poisonous harmful substance of degradation improves the biodegradability to reach the purpose of pesticide chemical waste water innocent treatment. The method can well degrade and treat the pharmaceutical chemical wastewater with high salt content, high nitrogen content, high chemical oxygen content and high toxicity at normal temperature, so that the wastewater meets the requirement of environmental protection, does not generate secondary pollution, and is an environment-friendly, advanced and scientific treatment process and system device.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (10)
1. Waste water treatment facilities, its characterized in that: the method comprises the following steps:
the electric flocculation system comprises an electric flocculation container and an electric flocculation electrode unit, wherein the electric flocculation electrode unit is arranged in the electric flocculation container;
the electric floatation system comprises an electric floatation container and a micro-bubble electric generation device, wherein the micro-bubble electric generation device comprises an air floatation electrode unit which is arranged in the electric floatation container and immersed in water in the electric floatation container, and the air floatation electrode unit can obtain electric energy to separate out gas, and the gas floats upwards to form micro-bubbles;
the electrocatalytic oxidation system comprises an electrooxidation container and an oxidation electrode unit, wherein the oxidation electrode unit is connected to the electrooxidation container;
the electric flocculation electrode unit, the air floatation electrode unit and the oxidation electrode unit can be electrically connected with a power supply, and the electric flocculation container, the electric floatation container and the electric oxidation container are sequentially connected.
2. The wastewater treatment apparatus according to claim 1, characterized in that: and a physicochemical container of a physicochemical flocculation system is arranged between the electric floating container and the electric oxidation container and behind the electric oxidation container, and the physicochemical flocculation system also comprises a dosing system device which is matched with the physicochemical container to add at least one of a flocculating agent and an oxidant into the physicochemical container.
3. The wastewater treatment apparatus according to claim 1, characterized in that: further comprising:
a water pump mechanism; and
an electro-reduction system comprising an electro-reduction vessel and a reduction electrode unit capable of being electrically connected to a power source, the reduction electrode unit being immersed in water in the electro-reduction vessel; the electroreduction electrode unit comprises a second positive electrode, a second negative electrode and an insulating and corrosion-resistant mesh, wherein the second positive electrode comprises an electrode stack formed by stacking particles containing carbon materials, the second negative electrode is arranged in the mesh, and the particle size and the mesh size of the mesh meet the condition that the particles cannot enter the mesh;
the water pump mechanism, the electric flocculation container, the electric reduction container, the electric floatation container and the electric oxidation container are sequentially communicated.
4. The wastewater treatment apparatus according to claim 2, characterized in that: a materialization container of a materialization flocculation system is arranged behind the electrooxidation container, and the materialization flocculation system also comprises a medicine adding system device which is matched with the materialization container to add at least one of a flocculating agent and an oxidizing agent into the materialization container.
5. The wastewater treatment apparatus according to claim 4, characterized in that: the device also comprises a filtering membrane system, and the filtering membrane system is connected with the water outlet of the materialization container.
6. The wastewater treatment apparatus according to claim 1, characterized in that: further comprising:
an electro-reduction system comprising an electro-reduction vessel and a reduction electrode unit capable of being electrically connected to a power source, the reduction electrode unit being immersed in water in the electro-reduction vessel; the electroreduction electrode unit comprises a second positive electrode, a second negative electrode and an insulating and corrosion-resistant mesh, wherein the second positive electrode comprises an electrode stack formed by stacking particles containing carbon materials, the second negative electrode is arranged in the mesh, and the particle size and the mesh size of the mesh meet the condition that the particles cannot enter the mesh;
the electric adsorption system comprises an electric adsorption container and an electric adsorption electrode unit capable of electrically connecting with a power supply, wherein the electric adsorption container is provided with an electric adsorption water inlet, a treated water outlet and a sewage outlet, the adsorption electrode unit comprises a first adsorption type electrode, a second adsorption type electrode and a non-adsorption type electrode, the power supply electrically connects the adsorption electrode unit to provide electric energy for the adsorption electrode unit, the adsorption electrode unit is electrified to enable the first adsorption type electrode and the second adsorption type electrode to adsorb impurities in water flowing through the adsorption electrode unit and flow out from the treated water outlet, the electrode direction is changed to enable the adsorption electrode unit to remove adsorption, and the adsorbed impurities are removed by water and flow out from the sewage outlet;
the electric flocculation container, the electric reduction container, the electric floating container, the electric oxidation container and the electric adsorption container are sequentially communicated.
7. The wastewater treatment apparatus according to claim 6, characterized in that: and physicochemical containers of a physicochemical flocculation system are arranged between the electric flocculation container and the electric reduction container, between the electric reduction container and the electric floating container and between the electric floating container and the electric oxidation container, and the physicochemical flocculation system also comprises a dosing system device which is matched with the physicochemical container so as to be capable of adding at least one of a flocculating agent and an oxidizing agent into the physicochemical container.
8. The wastewater treatment apparatus according to claim 7, characterized in that: the device also comprises a filtering membrane system, and the filtering membrane system is connected with the water outlet of the electric adsorption container.
9. The wastewater treatment apparatus according to any one of claims 1 to 8, characterized in that: the electric flocculation electrode unit comprises two electrode baskets made of insoluble metal materials, wherein meshes are formed in the electrode baskets, and the electrode baskets are used for placing electrode particles capable of being electrolyzed into electrode ions; the electric air floatation system also comprises a floating-assisting air microbubble generator, the floating-assisting air microbubble generator comprises an air pump, an air pipe and an air outlet nozzle which is arranged in the electric air floatation container and immersed in the water in the electric air floatation container, the air pipe is communicated with the air pump and the air outlet nozzle, the air outlet nozzle discharges air by starting the air pump, and the air floats upwards to form microbubbles; the air floatation electrode unit comprises a second positive electrode and a second negative electrode; the oxidation electrode unit comprises a plurality of first positive electrodes and a plurality of first negative electrodes which are arranged in an equal number and are uniformly spaced and staggered mode.
10. The wastewater treatment apparatus according to any one of claims 3 to 8, characterized in that: the particles comprise at least one of carbon or graphite particles; the second negative electrode adopts a stable electrode of iron, carbon, magnesium, copper, aluminum, nickel or titanium with the oxidized outer surface; the mesh fabric material is nylon, terylene or polyurethane fiber mesh fabric.
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