Three-phase biological fluidized bed

A technology of biological fluidized bed and three-phase separator, which is applied in the field of wastewater treatment, can solve the problems of poor practical applicability and poor treatment effect, and achieve the effect of shortening the film-hanging time

Inactive Publication Date: 2010-07-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still shortcomings such as poor

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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0018] See figure 1 , A three-phase biological fluidized bed, comprising a draft tube, a three-phase separator 8, a baffle 6, a baffle, a water inlet 2, an air inlet 1 and a plate air distributor 3; the three-phase separator 8 The baffle 6 and the baffle 6 are arranged on the upper part of the guide tube, the three-phase separator 8 and the top of the guide tube constitute a gas-liquid separation zone 9, and the solid-liquid separation zone 7 is formed between the baffle 6 and the inner wall of the guide tube; In the middle of the guide tube, a downflow zone 4 is formed between the baffle and the inner wall of the baffle, and an upflow zone 5 is formed between the baffles; the plate air distributor 3, the water inlet 2 and the air inlet 1 are from top to bottom The bottom is arranged at the bottom of the deflector in turn. The deflector is in a funnel shape.

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Abstract

The invention discloses a three-phase biological fluidized bed, which comprises a draft tube, a three-phase separator, a baffle, clapboards, a water inlet, a gas inlet and a plate-type gas distributor. The three-phase separator and the baffle are arranged on the upper part of the draft tube. The three-phase separator and the top of the draft tube form a gas-liquid separation area. A solid-liquid separation area is formed between the baffle and the inner wall of the draft tube. The baffle is arranged in the middle part of the draft tube. A down-flow area is formed between the clapboards and the inner wall of the draft tube. An up-flow area is formed between the clapboards. The plate-type gas distributor, the water inlet and the gas inlet are arranged on the bottom of the draft tube sequentially from top to bottom. The fluidized bed has a certain capacity of resisting impact of hydraulic loading and water quality loading and has rapider recovery rate. The amount of TSS is larger in the effluent of the fluidized bed. After the effluent is processed by a sedimentation tank, each index is basically normal. The final processing effect of the whole system is that the COD removal rate is about 75 percent, the SS removal rate is about 50 percent and the chroma removal rate is about 50 percent, so the expected effect is reached.

Description

Technical field: [0001] The invention belongs to the field of wastewater treatment, and relates to an industrial wastewater treatment device, in particular to a device for treating papermaking wastewater with a three-phase biological fluidized bed. Background technique: [0002] The paper industry is a traditional large water user and one of the important causes of water pollution. With the development of the national economy, enterprises are increasingly facing the problems of shortage of water resources and shortage of raw materials. On the other hand, water pollution is becoming more and more serious. The main cause of water pollution in the papermaking industry is the treatment of the middle-stage wastewater from the washing and bleaching process. The main pollutants in the middle-stage wastewater are cooking residues, bleaching extracts, and short fibers. There are a variety of organic substances in the mid-stage water of pulping and papermaking, most of which are prod...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F3/34C02F103/28
CPCY02W10/10
Inventor 张安龙王森杜飞景立明张嘉樊砥钢肖琳
Owner SHAANXI UNIV OF SCI & TECH
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