Integrated fluidized bed device for gradient ozone catalyzing and application of integrated fluidized bed device

An ozone-catalyzed, integrated technology, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, special compound water treatment, etc., can solve the problems that the wastewater treatment effect is difficult to meet the requirements, improve the effect of the catalytic oxidation series limit, etc., to achieve Improve the utilization rate, improve the treatment effect, and ensure the effect of the treatment effect

Pending Publication Date: 2017-05-10
NANJING UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of the above two applications are treated with multi-stage catalytic ozone oxidation of industrial wastewater, which can improve the oxidation efficiency of ozone and the treatment effect on wastewater to a certain extent, but the oxidation efficiency is mainly improved by multi-stage treatment of wastewater. However, its improvement effect is limited by the number of stages of specific catalytic oxidation, and the wastewater treatment effect after multi-stage treatment is still difficult to meet the requirements

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  • Integrated fluidized bed device for gradient ozone catalyzing and application of integrated fluidized bed device

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Embodiment 1

[0039] The integrated gradient ozone catalytic fluidized bed device of the present embodiment comprises a first-stage reactor 301 (ozone oxidation zone), a second-stage reactor 302 (ozone catalytic reaction zone), and a third-stage reactor 303 arranged sequentially from bottom to top. (ozone catalytic reaction zone) and the fourth-stage reactor 304, supporting filter plates 4 are arranged between adjacent reactors, and the bottom of the supporting filter plates 4 is connected with a uniform water distribution device, and the supporting filter plates 4 Made of stainless steel. Wherein, the bottom of primary reactor 301 is provided with water inlet 1 and ozone aeration device 2, and its top is provided with circulating water inlet 701, and ozone aeration device 2 is made of titanium alloy material and is connected with ozone generator, and ozone The preparation needs to use pure oxygen as the raw material for ozone generation. The first catalyst layer 501 and the second catalys...

Embodiment 2

[0042] Adopt the reaction device identical with embodiment 1, change each operation parameter, concrete operation is as follows: the filling height of catalyst in secondary reactor 302 accounts for the ratio of secondary reactor 302 height and the filling height of catalyst in tertiary reactor 303 accounts for The height ratio of the three-stage reactor 303 is 1 / 4, the reflux ratio is controlled to be 50%, the circulating water flow rate is 1.0m / min, so that the expansion ratio of the catalyst is 20%. The cut angle between the circulating water inlet 701 and the reactor main body is 30°. After ozone treatment, the wastewater enters the secondary and tertiary reactors in turn. The residence time of the wastewater in the reactor is 40 minutes. The COD of the original influent is 60mg / L on average, and the COD value after treatment is 35mg / L. The COD removal rate is 42%, compared with the original ozone catalytic fixed bed, the effluent COD is 45mg / L, and the COD removal rate has...

Embodiment 3

[0044] Adopt the same reaction device as embodiment 1, change each operating parameter, concrete operation is as follows: the filling height of catalyst in secondary reactor 302 accounts for the ratio of secondary reactor 302 height and the filling height of catalyst in tertiary reactor 303 accounts for three The ratio of the height of the first-stage reactor 303 is 1 / 5, and the catalyst in the second-stage reactor 302 is a synthetic ozone catalyst. This embodiment is an iron-manganese composite catalyst, and the catalyst in the third-stage reactor 303 is activated alumina supported copper and nickel. At the same time, the reflux ratio of the circulating water is controlled to be 100%, and the flow rate of the circulating water is 2.5m / min, so that the catalyst is expanded, and the expansion rate is 50%. The upward cutting angle between the circulating water inlet 701 and the reactor main body is 45°. After ozone treatment, the wastewater enters the secondary and tertiary rea...

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Abstract

The invention discloses an integrated fluidized bed device for gradient ozone catalyzing and application of the integrated fluidized bed device. The integrated fluidized bed device comprises a primary reactor, a secondary reactor, a tertiary reactor and a quaternary reactor from bottom to top, a water inlet and an ozone aerating apparatus are arranged at the bottom of the primary reactor, a recycling water inlet is arranged on an upper portion of the primary reactor, a catalyzer layer and a second catalyzer layer are respectively arranged in the secondary reactor and the tertiary reactor, a water outlet and a recycling water outlet are arranged on an upper portion of the tertiary reactor, the recycling water inlet is connected with the recycling water outlet through a reflux pump and a circulating tube, and an upper cut angle is reserved between the recycling water inlet and a main reactor body. The integrated fluidized bed device for gradient ozone catalyzing has the advantages that a usage rate and a catalytic oxidation efficiency of ozone are increased, a catalytic oxidation reaction is more efficient and more thorough, a compact reaction mechanism is adopted to enable the reaction to be finished in one device, and small floor area is occupied.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to an integrated gradient ozone catalytic fluidized bed device, in particular to a vertical flow multi-stage gradient catalytic ozone oxidation and ozone oxidation system suitable for industrial park wastewater treatment or domestic sewage advanced treatment that is difficult to biodegrade. Filtration pool. Background technique [0002] With the rapid development of industrial technology, the types and discharge of industrial wastewater are increasing day by day, among which the refractory organic industrial wastewater is the most harmful, and its composition is becoming more and more complex, and its biodegradability is poor, the toxicity is high, and it often contains Cyanide, phenolic compounds, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, nitroaromatics, and other substances that are toxic or highly toxic to organisms and microorganisms. These substances ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F9/04
CPCC02F1/001C02F1/725C02F1/78C02F2305/02C02F2101/30C02F2201/784
Inventor 李爱民王程何尚卫戴建军双陈冬许涵李梦晓卞为林杨道林张志军
Owner NANJING UNIV
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