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Catalytic ozonation device and method for treating coal chemical concentrated solution

A technology of ozone catalytic oxidation and ozone oxidation, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problem of insufficient contact between catalysts and wastewater, increased wastewater treatment costs, waste of ozone and catalysts, etc. problems, to achieve the effect of convenient operation, increasing utilization rate and saving usage

Active Publication Date: 2021-05-14
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing ozone catalytic oxidation technology has problems such as low ozone utilization rate, insufficient contact between catalyst and wastewater, and difficulty in catalyst recovery, resulting in low wastewater treatment efficiency, serious waste of ozone and catalyst, which not only affects the treatment effect of wastewater, but also Increased waste water treatment costs

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  • Catalytic ozonation device and method for treating coal chemical concentrated solution

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preparation example Construction

[0051] After the ozone pre-oxidation treatment is completed, the present invention replaces the packing plate in the stirring blade of the main agitator with the packing plate filled with activated iron shavings, and carries out the first-stage catalytic ozonation under the stirring conditions of the main agitator and the auxiliary agitator deal with. In the present invention, the filling rate of the activated iron shavings in the filler board is preferably 30-60%; the preparation method of the activated iron shavings preferably includes the following steps: performing alkali washing and pickling on the iron shavings in sequence to obtain the activated iron shavings; The alkaline cleaning agent for alkaline cleaning is preferably sodium hydroxide solution, and the concentration of the sodium hydroxide solution is preferably 1 to 1.5 mol / L, more preferably 1.3 to 1.4 mol / L, and the time for the alkaline cleaning is preferably 22~24h, more preferably 21~23h; The pickling agent f...

Embodiment 1

[0058] The wastewater is taken from the effluent of reverse osmosis concentrate of a coal-to-gas project. The main indicators of the wastewater are COD 297.3mg / L, pH 7.7, UV 254 is 6.520.

[0059] use figure 1 The device in is used to treat wastewater, wherein: the reaction chamber is cylindrical, the length of the main shaft of the main agitator is 3 / 4 of the height of the reaction chamber, the length of the stirring blade is 3 / 4 of the radius of the reaction chamber, the height is 8cm, and the width of the main agitator is 1 / 6 of the height, 4 stirring blades; the length of the main shaft of the auxiliary agitator is 1 / 5 of the height of the reaction chamber; the number of microporous aerators is 16, and the number of holes on the packing plate is 9.

[0060] The processing steps are as follows:

[0061] Use sodium hydroxide to adjust the pH value of the coal gasification wastewater to 9, first install a packing plate without a catalyst in the blade of the main agitator, a...

Embodiment 2

[0070] The wastewater is taken from the biochemical secondary effluent of a coal-to-gas project. The main indicators of the wastewater are COD 451.0mg / L, pH 7.4, UV 254 is 6.920.

[0071] use figure 1The device in is used to treat wastewater, wherein: the reaction chamber is cylindrical, the length of the main shaft of the main agitator is 3 / 4 of the height of the reaction chamber, the length of the stirring blade is 3 / 4 of the radius of the reaction chamber, the height is 10cm, and the width of the main agitator is 1 / 6 of the height, 4 stirring blades; the length of the main shaft of the auxiliary agitator is 1 / 5 of the height of the reaction chamber; the number of microporous aerators is 16, and the number of holes on the packing plate is 9.

[0072] The processing steps are as follows:

[0073] Use sodium hydroxide to adjust the pH value of the coal gasification wastewater to 9, first install a packing plate without a catalyst in the blade of the main agitator, and perfor...

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Abstract

The invention relates to the technical field of wastewater treatment, and provides a catalytic ozonation device and a method for treating a coal chemical concentrated solution. The device provided by the invention comprises a reactor, an ozone generator, a water collecting tank and a tail gas processor. A main stirrer and an auxiliary stirrer are arranged in the reaction cavity of the reactor, full contact of wastewater and ozone can be achieved, the auxiliary stirrer can damage ozone bubbles, and the utilization rate of ozone is increased; detachable filler plates are arranged on the stirring blades of the main stirrer, so that a catalyst can be conveniently recycled, and the types of the catalyst can be replaced; and an exhaust port is further formed in the side wall of the reaction cavity and communicated with a water collecting tank, redundant ozone enters the water collecting tank to be reused, and the utilization rate of the ozone can be further increased. The method for catalyzing the coal chemical concentrated solution is high in ozone utilization rate, the use cost of the catalyst is saved, meanwhile, the removal efficiency of pollutants can be improved, and the treatment effect is good.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an ozone catalytic oxidation device and a method for treating concentrated liquid of coal chemical industry. Background technique [0002] Coal chemical concentrates contain indole, pyridine and other difficult-to-degrade organic pollutants. Common biochemical treatment methods have not met the treatment requirements for coal chemical concentrates. The ozone catalytic oxidation technology produces hydroxyl radicals with stronger oxidation ability under the action of the catalyst, and then completely oxidizes the refractory organic matter. [0003] However, the existing ozone catalytic oxidation technology has problems such as low ozone utilization rate, insufficient contact between catalyst and wastewater, and difficulty in catalyst recovery, resulting in low wastewater treatment efficiency, serious waste of ozone and catalyst, which not only affects the treatment ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/66C02F1/78C02F1/28
CPCC02F9/00C02F1/66C02F1/78C02F1/281C02F2201/78C02F2209/08
Inventor 陈秀荣杨莹莹胡雪洋王渊高钰清陈智翀丁彪赵嘉敏
Owner EAST CHINA UNIV OF SCI & TECH
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