A device for efficient separation and automatic circulation of powder catalysts in the process of catalytic oxidation treatment of sewage

Abstract

The invention discloses a device for enabling fine catalyst to be efficiently separated and automatically circulated during catalytic oxidation treatment of sewage, and belongs to the field of water pollution control. The device comprises a strong oxidant adding device, a lifting pump, a water injector, an ozone generator, an ultraviolet lamp controller, a catalytic oxidation reaction tank, a catalyst separation pump, a flowmeter, a catalyst water inlet valve, a centrifugal hydraulic interception pulse separator, a water outlet valve, a catalyst return valve, a deactivated catalyst discharge valve, a pulse backwash pump, a pulse backwash valve and a clean water tank. The device greatly reduces differential pressure rise caused by accumulation of the fine catalyst on the surface of a filtercartridge of the centrifugal hydraulic interception pulse separator through the coupling effect of inlet water tangent scouring, centrifugal force and pulse backwash, thereby guaranteeing the long-term, stable and efficient separation operation of the centrifugal hydraulic interception pulse separator. The device can not only realize the efficient separation of the fine catalyst, but also realizethe automatic circulation of the fine catalyst after separation.

Description

technical field [0001] The invention belongs to the field of water pollution control, and in particular relates to a device for efficient separation and automatic circulation of powder catalysts in the process of catalytic oxidation treatment of sewage. Background technique [0002] The tail water of domestic sewage plants contains a certain amount of refractory organic pollutants. The vast majority of industrial sewage usually has low BOD / COD, high COD content and is difficult to biodegrade. Therefore, the chemical oxidation method is often used in the advanced treatment of tail water in domestic sewage plants and the treatment of industrial sewage, but the traditional chemical oxidation method must add an excessive amount of strong oxidizing agents (such as H 2 o 2 , ClO 2 , O 3 ), and the chemical oxidation takes a long time (usually not less than 60min), the pH value is often around 3, and the reaction conditions are harsh. Catalytic oxidation can greatly promote the...

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Problems solved by technology

Obviously, the existing catalyst separation methods and equipment have shortcomings such as low recovery efficiency, catalyst loss, and complicated operating procedures for the separation and recovery of powder catalysts, which limit their wide application.

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