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Dry-wet combined desulfurization and dust removal method for waste gas generated during brick making by blending sludge

A technology of desulfurization and dust removal and sludge brick making, which is applied in the direction of combined devices, separation methods, chemical instruments and methods, etc., can solve the problems of factory shutdown and cleaning, high COD, secondary pollution treatment costs, etc., and achieve the effect of reducing operating costs

Inactive Publication Date: 2021-07-23
JIANGMEN TONGLI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing waste gas produced by blending sludge and making bricks is usually treated by wet desulfurization and dust removal methods. A large amount of organic waste gas generated during the drying process is directly discharged into the kiln flue gas treatment equipment, resulting in the failure of the wet desulfurization and dust removal system. COD and ammonia nitrogen in the circulating slurry are very high, resulting in secondary pollution and high follow-up treatment costs; after a period of time, the circulating tank will accumulate organic sediment, which needs to be cleaned, seriously affecting the system availability and continuous operating conditions. May cause the factory to be forced to shut down for cleaning

Method used

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  • Dry-wet combined desulfurization and dust removal method for waste gas generated during brick making by blending sludge
  • Dry-wet combined desulfurization and dust removal method for waste gas generated during brick making by blending sludge
  • Dry-wet combined desulfurization and dust removal method for waste gas generated during brick making by blending sludge

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Embodiment 1

[0044] Select a factory that uses sludge as raw material to manufacture environmentally friendly bricks, and use the method of the present invention to treat the generated waste gas. Specifically, this embodiment adopts the following systems and methods for processing.

[0045] 1. Analysis of waste gas pollutants treatment of brick-making with blended sludge.

[0046] The main raw materials of sintered environmental protection bricks are papermaking sludge, printing and dyeing washing sludge, municipal sewage treatment plant sludge, food and condiment factory sludge, shale, fly ash, cinder (slag) and construction site sludge, etc. The production process is mainly divided into three steps: (1) drying, using a biomass rotary kiln to dry the sludge from a moisture content of 60% to 40%; (2) making bricks, using an appropriate material ratio to mix the materials , use the brick making machine to press the mixed raw materials into bricks; (3) sintering, send the pressed bricks to ...

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Abstract

The invention provides a dry-wet combined desulfurization and dust removal method for waste gas generated during brick making by blending sludge, and relates to the technical field of environmental protection. Desulfurization and dust removal are carried out by adopting a dry-wet method combined desulfurization and dust removal system, and the method comprises the following steps: treating drying kiln waste gas, namely introducing the waste gas in a sludge blending combustion brick making drying step into the dry method desulfurization and dust removal system, carrying out semi-dry method desulfurization, and carrying out dust removal after desulfurization; treating sintering kiln waste gas: introducing the waste gas in the step of brick making and sintering by blending the sludge into a wet desulfurization and dust removal system, carrying out wet desulfurization, and carrying out dust removal after desulfurization; flue gas combined discharging: guiding the waste gas treated by the dry desulfurization and dust removal system and the waste gas treated by the wet desulfurization and dust removal system into a waste gas gathering system to be mixed, and discharging the waste gas after being detected to be qualified. Dividing treatment is carried out according to the property of the waste gas, equipment faults are reduced, the operation cost can be reduced, and the treated waste gas meets the emission standard.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a dry-wet combined desulfurization and dust removal method for brick-making waste gas mixed with burning sludge. Background technique [0002] In order to reduce pollutant discharge and improve the utilization rate of raw materials, the cement and brick and tile industries will use their own industrial furnaces such as tunnel kilns or wheel kilns to mix strictly controlled waste such as printing and dyeing sludge and municipal sludge into raw materials in a certain proportion making bricks. The production process of blending sludge to make bricks is mainly divided into three steps: drying, using a biomass rotary kiln to dry the sludge from a moisture content of 60% to 40%; making bricks, using an appropriate material ratio to mix the materials , use the brick making machine to press the mixed raw materials into adobe; sintering, send the pressed adobe to the tun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D50/00B01D53/02B01D53/50B01D53/60B01D53/78B01D53/96
CPCB01D53/504B01D53/78B01D53/80B01D53/96B01D53/02B01D53/60B01D2251/604B01D2251/404B01D2253/102B01D2258/0283B01D2258/02B01D50/20
Inventor 李宇翔胡满深周景堂潘柏盛温超强
Owner JIANGMEN TONGLI ENVIRONMENTAL PROTECTION TECH
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