Two-stage coagulation air-flotation separation equipment and method
A separation equipment and coagulation air flotation technology, applied in the field of environmental engineering, can solve the problems of large floor area, high equipment cost, poor separation effect, etc., and achieve the effect of fast floating speed, lower water content and stable scum
Inactive Publication Date: 2014-07-16
DALIAN JIAOTONG UNIVERSITY
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Problems solved by technology
This traditional water treatment process takes a long time, and at the same time, it needs to set up a coagulation dosing unit and a coagulation reaction unit, and the separation effect is poor, so it occupies a large area and the equipment cost is also high.
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[0035] Such as figure 1As shown, a secondary coagulation and air flotation separation equipment includes a sewage pump 2, a multiphase medium pump 5, a pH regulator dosing box 15, a coagulant PAC dosing box 16, and a coagulant PAM dosing box 17 And solid-liquid reaction separation equipment 31. The solid-liquid reaction separation device 31 is provided with a primary solid-liquid separation zone 32, a secondary mixing reaction zone 33 formed outside the primary solid-liquid separation zone and surrounded by deflectors, and a secondary mixing reaction zone 33 arranged on the solid-liquid separation zone. The slag scraper 34 in the upper part of the reaction separation device 31, the perforated water collection pipe 38 arranged in the lower part of the solid-liquid reaction separation device 31 and the emptying pipe 44 arranged at the bottom of the solid-liquid reaction separation device 31; The slag machine 34 comprises a slag scraper 35 arranged at the upper end of the scum t...
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The invention discloses two-stage coagulation air-flotation separation equipment. The two-stage coagulation air-flotation separation equipment comprises a sewage pump, a multiphase medium pump, a pH regulator dosing box, a coagulant PAC (Poly Aluminium Chloride) dosing box, a coagulant-aid PAM (Polyacrylamide) dosing box and solid-liquid reaction separation equipment. The two-stage coagulation air-flotation separation equipment is characterized in that the solid-liquid reaction separation equipment is internally provided with a first-stage solid-liquid separation area, a second-stage mixed reaction area and a slag scraper, wherein the second-stage mixed reaction area is arranged at the outer side of the first-stage solid-liquid separation area and is formed by enclosure of flow guiding plates; and the slag scraper is arranged at the upper part in the solid-liquid reaction separation equipment. The invention also provides a method for carrying out separation by applying the separation equipment. According to the method, before sewage passes through the sewage pump, agents are added for mixing with the sewage, and then the mixture is mixed with air-dissolved water, and then enters the solid-liquid reaction equipment for reaction, so that the coagulation treatment of the sewage can be fully realized and colloid and fine particulate pollutants in water can be better separated. The equipment and the method disclosed by the invention have the advantages that the agent using amount is saved, simultaneously the treating effect is improved, and the equipment is high in integration rate and small in occupied area and the like.
Description
technical field [0001] The invention relates to the field of environmental engineering, in particular to a secondary coagulation air flotation separation device and method. Background technique [0002] Coagulation air flotation water purification technology is an efficient and fast solid-liquid separation technology, which started from mineral processing. This technology has attracted the attention of scholars at home and abroad in the field of water treatment and has developed rapidly. It has been widely used in water supply, especially It is the purification treatment of low temperature, low turbidity and rich algae water body, as well as the treatment of urban sewage and industrial wastewater. The air flotation process can be divided into electrolytic condensation air flotation, air distribution air flotation and dissolved air flotation according to the different generation methods of bubbles. Partial return pressure dissolved air flotation is the most commonly used proc...
Claims
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IPC IPC(8): C02F9/04C02F1/24C02F1/66C02F1/56
Inventor 费庆志马飞许芝吴丹
Owner DALIAN JIAOTONG UNIVERSITY