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An in-situ activated fixed-bed heterogeneous catalyst reactor

A technology of heterogeneous catalysts and fixed bed catalysts, applied in chemical instruments and methods, chemical/physical processes, oxidized water/sewage treatment, etc., can solve the problems of reducing the power consumption of circulating water pumps, poor wastewater treatment effects, catalyst poisoning, etc. problems, to achieve the effect of improving anti-pollution, reducing power consumption, and good catalyst regeneration

Active Publication Date: 2022-04-12
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The invention overcomes the disadvantages of catalyst poisoning and poor wastewater treatment effect existing in the existing fixed-bed heterogeneous catalyst reaction, and provides an in-situ activated fixed-bed heterogeneous catalyst reactor, which can effectively remove and damage the surface of the catalyst Air bubbles and colloidal substances, the alternate operation of nozzles and aeration devices can not only achieve better catalyst regeneration and anti-pollution effects, but also greatly reduce the power consumption of circulating water pumps, thereby reducing costs

Method used

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  • An in-situ activated fixed-bed heterogeneous catalyst reactor
  • An in-situ activated fixed-bed heterogeneous catalyst reactor
  • An in-situ activated fixed-bed heterogeneous catalyst reactor

Examples

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Embodiment 1

[0062]The in-situ activated fixed-bed heterogeneous catalyst reactor in this example is a Fenton-like catalytic reactor with an effective height of 4 m. The reactor is filled with fixed-bed catalysts. The catalysts are arranged in 4 layers and 2 columns. The height direction of the reactor gradually decreases from bottom to top. The distance between the two catalyst layers at the bottom of the reactor is 1 / 5 of the effective height of the reactor, that is, 0.8m. The distance between the two catalyst layers at the top of the reactor is 1 / 10 of the effective height of the reactor. , that is, 0.4m, the distance between the two catalyst layers in the middle is 0.6m, the catalyst layer height is 0.35m, and the catalyst filling height ratio is 35%. In the reactor, a circulating water pipe is installed around the catalyst and in the middle of the two rows. The circulating water pipe is connected to the circulating water tank through a circulating pump. A nozzle is installed on the cir...

Embodiment 2

[0071] The in-situ activated fixed-bed heterogeneous catalyst reactor in this example is an ozone catalytic oxidation tower, and the effective height of the reactor is 8m. The height direction gradually decreases from bottom to top, the distance between the two catalyst layers at the bottom of the reactor is 1 / 8 of the effective height of the reactor, that is, 1.0m, and the distance between the two catalyst layers at the top of the reactor is 1 / 20 of the effective height of the reactor, namely 0.4m, the distance between the middle two catalyst layers is 0.8m and 0.6m from bottom to top, the catalyst layer height is 0.4m, and the catalyst filling height ratio is 25%. In the reactor, a circulating water pipe is set around the catalyst, and the circulating water pipe is connected to the circulating water tank through a circulating pump. A nozzle is installed on the circulating water pipe, and the sprayed water flow of the nozzle plays a role in catalyst activation on the surface o...

Embodiment 3

[0075] The in-situ activated fixed-bed heterogeneous catalyst reactor in this example is a micro-electrolytic catalytic oxidation reactor, and the effective height of the reactor is 8m. The reactor is filled with fixed-bed catalyst iron-carbon packing, and the iron-carbon packing is divided into 3 layers and 2 columns. Arrangement, the distance between the catalyst layers and the height direction of the reactor gradually decreases from bottom to top. The distance between the two layers of catalyst layers at the bottom of the reactor is 1 / 4 of the effective height of the reactor, that is, 0.75m. The distance between the two layers of catalyst layers on the top of the reactor is the effective height of the reactor. 1 / 10 of the height, that is, 0.3m, the catalyst layer is 0.45m high, and the catalyst filling height ratio is 75%. In the reactor, a circulating water pipe is installed around the catalyst and in the middle of the two rows. The circulating water pipe is connected to th...

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Abstract

The invention discloses an in-situ activated fixed-bed heterogeneous catalyst reactor, which belongs to the technical field of wastewater treatment. The reactor of the present invention comprises a catalytic reaction zone. In the catalytic reaction zone, at least one column of fixed-bed catalysts is arranged non-equidistantly along the height direction of the reactor. An aeration device is arranged at the bottom of the fixed-bed catalysts. Adjustable nozzles with complementary sizes, the nozzles and the aeration device operate alternately, the water sprayed by the nozzles forms a shear angle on the surface of the fixed bed catalyst, and the water is sprayed to the upper and lower surfaces of the fixed bed catalyst through the nozzles to form and react in the reactor The horizontal plane of the device is a swirl surface at a certain angle. The invention overcomes the shortcomings of existing catalyst poisoning and poor wastewater treatment effect, can effectively remove bubbles and colloidal substances that damage the surface of the catalyst, alternately operates the nozzle and the aeration device, can achieve better catalyst regeneration and anti-pollution effects, and greatly reduces Power consumption and cost of circulating water pump.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and more specifically relates to an in-situ activated fixed-bed heterogeneous catalyst reactor. Background technique [0002] In the process of wastewater treatment, in order to improve the removal effect and efficiency of pollutants in wastewater, catalysts are often used to reduce the activation energy of the reaction, thereby improving the degradation effect. There are many kinds of catalysts used in wastewater treatment, among which heterogeneous catalysts occupy a large proportion. The heterogeneous catalysts for wastewater treatment on the market include ozone catalysts, Fenton-like catalysts, iron-carbon catalysts, etc. According to different wastewater treatment processes, the components of the catalysts also vary greatly. In general, the catalyst is mainly composed of a carrier and a loaded metal. The carrier mainly includes activated carbon, ceramsite, ceramics, fibers, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/04C02F1/72C02F1/76C02F1/78C02F1/461
CPCB01J8/0465B01J8/0492C02F1/725C02F1/722C02F1/76C02F1/78C02F1/46176B01J2208/00902C02F2201/002C02F2201/46105C02F2201/784C02F2303/14
Inventor 张炜铭高亚娟潘丙才汪林吕振华
Owner NANJING UNIV
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