CN205473259U - Integration continuous type fenton oxidation reduction sewage treatment device - Google Patents

Abstract

The utility model discloses a does integration continuous type fenton oxidation reduction sewage treatment device belong to sewage treatment technical field, by high concentration equalizing basin, low concentration equalizing basin, fe C micro cell, fenton oxidation pond, sedimentation tank, oxygen deficiency pond, contact oxidation tank, MBR pond, composite Biological filtering pond and sludge impoundment are constituteed. Is each reaction tank for serial and the parallel structure mode that combines together, by high concentration equalizing basin, fe in this equipment C micro cell, fenton oxidation pond, sedimentation tank, oxygen deficiency pond, contact oxidation tank, MBR pond and composite Biological filtering pond connect gradually backward in the past and constitute serial structure, the low concentration equalizing basin is parallel with the high concentration equalizing basin, directly is connected with the sedimentation tank, composite Biological filtering pond and sludge impoundment are parallel, and sewage gets into discharge system behind the composite Biological filtering pond, and settled sludge gets into the sludge impoundment and carries out subsequent processing. Be applicable to high concentrations such as various chemical industry, pharmacy, the dirty treatment of water of severe.

Description

Integrated continuous Fenton redox sewage treatment equipment

technical field

The utility model belongs to the technical field of sewage treatment and relates to sewage treatment equipment, in particular to integrated continuous Fenton redox sewage treatment equipment.

Background technique

Chemical and pharmaceutical sewage often has the characteristics of high concentration, complex components, high toxicity, and poor biodegradability. Therefore, chemical sewage is one of the most difficult types of sewage in the field of sewage treatment. At present, there are mainly two kinds of technologies used in chemical and pharmaceutical sewage treatment: physical and chemical methods and biochemical methods. In practical applications, the water quality of the two technologies is not stable, or the investment and construction costs are too large, energy consumption and operation and maintenance costs High, greatly increasing the cost of sewage treatment for enterprises. Along with social progress, people's environmental awareness is enhanced, and all sectors of society pay more attention to environmental protection. Effective methods must be adopted for heavy sewage to meet the national sewage discharge standards.

The invention of application number 201310584440.1 discloses an interlocking control modular Fenton reagent wastewater treatment method and device, so that the wastewater successively passes through the first adjustment pool, the second adjustment pool, the strong oxidation reaction pool, the pH value callback pool and the flocculation Pool five reaction pools. The pH value of the wastewater is adjusted in the first adjustment pool, and H ₂ O ₂ is added to the second adjustment pool to control the oxidation-reduction potential of the wastewater in the strong oxidation response pool at 1.8V-2.8V. Sodium hydroxide adjusts the pH value of the wastewater, and finally the wastewater enters the flocculation tank, and a flocculant is added to the flocculation tank. The device disclosed in this patent has obvious effects on ordinary sewage treatment, but it has disadvantages for heavy sewage treatment such as industry and pharmaceuticals with many impurities and a large amount of sludge. Effective treatment methods can easily cause secondary hazards of sewage treatment.

Utility model content

In order to solve the deficiencies of the prior art, the utility model provides integrated continuous Fenton redox sewage treatment equipment to realize the up-to-standard discharge of heavy sewage such as chemical industry and pharmaceutical industry.

The technical scheme of the utility model is as follows:

Integrated continuous Fenton redox sewage treatment equipment, consisting of high-concentration regulating tank, low-concentration regulating tank, Fe-C micro-electrolytic tank, Fenton oxidation tank, sedimentation tank, anoxic tank, contact oxidation tank, MBR (membrane bio Reaction) tank, composite biological filter and sludge tank. Each reaction tank in the sewage treatment equipment is a combination of serial and parallel structure mode, which consists of high concentration adjustment tank, Fe-C micro-electrolysis tank, Fenton oxidation tank, sedimentation tank, anoxic tank, contact oxidation tank, MBR tank and The compound biological filter is connected in sequence from front to back to form a serial structure; the low-concentration regulating tank is parallel to the high-concentration regulating tank, and is directly connected to the sedimentation tank; the compound biological filter is parallel to the sludge tank, and the sewage is discharged after passing through the compound biological filter system, the settled sludge enters the sludge tank for subsequent treatment.

Severe sewage such as chemicals and pharmaceuticals flows into the high-concentration regulating pool and low-concentration regulating pool through the pipeline system according to its concentration. For the sewage in the high-concentration regulating pool, the water quality, water volume and pH value are adjusted to maintain the pH value at 3. -4 levels.

After passing through the high-concentration regulating pool, the sewage is pumped into the Fe-C micro-electrolytic pool. The interior of the Fe-C micro-electrolytic cell is filled with a mixed filler of iron filings and carbon particles. After the sewage with a pH value of 3-4 enters the Fe-C micro-electrolytic cell, under the action of an acidic medium, a micro-primary battery chemistry is formed between iron and carbon. The reaction releases extremely active [H], at this time the pH value of the sewage is 5-6, and the new ecological [H] can undergo redox reactions with many components in the solution in a weakly acidic environment. After passing through the Fe-C micro-electrolysis cell, the organic matter in the sewage is completely oxidized, the COD is greatly reduced, the biodegradability is greatly improved, and the generated Fe ²⁺ can be captured.

The sewage enters the Fenton oxidation pool through the Fe-C micro-electrolysis cell, and H ₂ O ₂ is added to the Fenton oxidation pool, and the concentration of Fe ²⁺ is kept at about 0.5 mg/l, and the concentration of H ₂ O ₂ is 4 mg/l, which can Form a stronger oxidizing Fenton (Fenton) reagent, react for 30 to 60 minutes, generate strong oxidizing hydroxyl radicals through redox reaction, and carry out ring-opening and chain-breaking oxidation of organic pollutants. The new ecological Fe also has high activity and generates Fe ²⁺ . As the reaction progresses further, flocs with Fe ²⁺ as the gelling center are formed.

The Fe ²⁺ generated by Fenton oxidation can trap, engulf and adsorb the suspended colloids for co-sedimentation. At this time, the composite flocculant PAC is added to adjust the pH value of the sewage to 7-8, and then enter the sewage together with the low-concentration adjustment tank. Reactive flocculation in sedimentation tanks. After the flocculation reaction, the small particles and particulate suspensions in the wastewater are further flocculated into large particle suspensions, thereby improving their settling properties, and the settled sludge flows into the sludge tank automatically.

After sedimentation treatment, the pollution indicators such as SS, CODcr and BOD ₅ are greatly reduced, and the effluent flows into the anoxic pool. The anoxic tank has built-in biological fillers, which can reduce the loss rate of activated sludge, further degrade organic matter in sewage, oxidize macromolecular compound chain organic matter into small molecular single chain organic matter, and improve the biodegradability of sewage.

The sewage flows into the contact oxidation tank through the anoxic tank for aeration and aerobic reaction. The fan is used to provide air for the contact oxidation tank for aeration, and the built-in high-efficiency biological filler in the tank is used. The biological activity in the aerobic tank is extremely high, and a large number of biofilms are attached to the surface of the filler by microorganisms, and the biofilm is used to exchange and biochemically treat the sewage. The pollution index of sewage has been greatly reduced.

The sewage enters the MBR pool through the contact oxidation tank, and undergoes ultrafiltration membrane biochemical reaction. Under the blowing action of the fan, more efficient biochemical reactions are carried out in the MBR pool to further remove pollutants. The sewage flows into the composite biological filter after passing through the MBR tank, part of the sedimented sludge flows back to the anoxic tank, and most of the sludge enters the sludge tank.

The anaerobic biological treatment, aerobic biological treatment and filtration of sewage are completed in one time in the composite biological filter, and after multi-stage purification, the degradation of organic matter, denitrification and phosphorus removal, and filtration of sewage are realized. After the sewage treatment, the water quality is improved and meets the discharge standard, and can be discharged directly through the discharge outlet.

After collecting the sludge in the sedimentation tank and MBR tank in the sludge tank, it is lifted by the diaphragm pump into the stacked screw sludge dewatering machine for dehydration. The dehydrated and dried sludge is transported abroad or safely landfilled, and the filtrate is returned to the comprehensive adjustment tank. , to prevent secondary pollution.

The effect and benefit of the utility model are that the integrated continuous Fenton redox sewage treatment equipment and multiple continuous reaction pools make the sewage treatment reaction more sufficient, reduce the generation of intermediate products, improve the utilization rate of the oxidant, and realize Continuous water intake, continuous reaction; one-time input, long-term use, simple maintenance, and reduced operation and maintenance costs; suitable for the treatment of high-concentration and severe sewage such as various chemicals and pharmaceuticals.

Description of drawings

Figure 1 Schematic diagram of the integrated continuous Fenton redox sewage treatment equipment.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

The integrated continuous Fenton redox sewage treatment equipment, as shown in Figure 1 of the manual, consists of a high-concentration regulating tank, a low-concentration regulating tank, an Fe-C micro-electrolytic tank, a Fenton oxidation tank, a sedimentation tank, an anoxic tank, It consists of contact oxidation tank, MBR tank, compound biological filter and sludge tank.

Example

Sludge tank, size: φ10.0m×3.5m; structure: underground steel concrete structure; volume: 235m ³ ; equipped equipment: sludge pump, stacked screw sludge dehydrator, etc.; quantity: 1 set.

High concentration adjustment pool and low concentration adjustment pool, size: 8.0m×4.0m×3.0m; structure: underground steel concrete structure; volume: 100m ³ ; quantity: 1 block, 2 grids.

Fe-C micro-electrolytic cell, size: φ1.5m×4.0m; structure: complete set of anti-corrosion structure; effective volume: 3.0m ³ ; quantity: 1 seat.

Fenton oxidation tank, size: 3.5m×5.5m×2.5m; structure: semi-underground steel concrete, anti-corrosion structure; effective volume: 38m ³ ; quantity: 1 seat.

Sedimentation tank, size: 4.0m×4.0m×3.0m; structure: semi-underground steel concrete structure; effective volume: 45m ³ ; quantity: 1 seat.

Anoxic tank, size: 8.0m×3.0m×4.0m; structure: semi-underground steel concrete structure; effective volume: 80m ³ ; equipment: 1 set of biochemical filler, bottom stirring system; quantity: 1 seat.

Contact aerobic pool, size: 6.0m×7.5m×4.0m; structure: underground steel concrete structure; effective volume: 158m ³ ; equipped equipment: microporous aerator and bracket, biochemical filler 158m ³ ; quantity: 1 Seat 2 cells.

MBR tank, size: 4.0m×7.5m×4.0m; structure: underground steel concrete structure; effective volume: 105m ³ ; equipped equipment: microporous aerator and bracket, biochemical filler 105m ³ , MBR membrane and formwork 1 set; Quantity: 1 seat.

Composite biological filter, size: φ3.0m×4.0m; structure: complete set of anti-corrosion structure; volume: 25m ³ ; equipped equipment: 1 set of filter plate, filter material 25m ³ ; quantity: 1 seat.

The treatment process of the integrated continuous Fenton redox sewage treatment equipment is shown in the table below:

The drawings in the manual are only for the structure and schematic diagram of the product, and the actual product structure and size are subject to the inventor's design and production drawings.

The above-mentioned embodiments are only to describe the implementation of the present utility model, but not to limit the concept and scope of the present utility model. Under the premise of not departing from the design concept of the present utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the present utility model shall fall into the protection scope of the present utility model, and the scope of the present utility model shall be determined by the scope of the present utility model. The claims appended hereto rather than the foregoing description limit.

Claims (4)

1. Integrated continuous Fenton redox sewage treatment equipment, consisting of high-concentration regulating tank, low-concentration regulating tank, Fe-C micro-electrolytic tank, Fenton oxidation tank, sedimentation tank, anoxic tank, contact oxidation tank, MBR ( Membrane bioreaction) tank, compound biological filter tank and sludge tank, it is characterized in that, each reaction tank in the described equipment is the combination structure pattern of series and parallel, is made up of high concentration adjustment tank, Fe-C micro-electrolysis tank, The Fenton oxidation tank, sedimentation tank, anoxic tank, contact oxidation tank, MBR tank and composite biological filter are connected in sequence from front to back to form a serial structure; the low concentration adjustment tank is parallel to the high concentration adjustment tank, and is directly connected to the sedimentation tank; The composite biological filter and the sludge tank are parallel, the sewage enters the discharge system after passing through the composite biological filter, and the settled sludge enters the sludge tank for subsequent treatment. 2. The integrated continuous Fenton redox sewage treatment equipment according to claim 1, characterized in that the pH value of the sewage in the high-concentration regulating tank is maintained at 3-4. 3. integrated continuous Fenton redox sewage treatment equipment according to claim 1, is characterized in that, described Fe-C micro-electrolytic cell inside is filled with the mixed filler of iron filings and carbon particle, and wherein sewage pH value is 5-6. 4. The integrated continuous Fenton redox sewage treatment equipment according to claim 1, characterized in that H ₂ O ₂ is added to the Fenton oxidation tank, and the concentration of Fe ²⁺ is kept at about 0.5 mg/l , the H ₂ O ₂ concentration is 4 mg/l.