Integrated technology of thermal decomposing, dry distilling and gasifying sludge and preparing of ceramsite

A technology of pyrolysis and dry distillation and ceramsite, which is applied in pyrolysis treatment of sludge, dehydration/drying/concentrated sludge treatment, clay products, etc., can solve the problems of soil and crops being polluted, achieve significant economic benefits, curb the secondary Effects of production of harmful substances such as oxins

Inactive Publication Date: 2013-01-16
TIANJIN URBAN CONSTR COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Landfill is to treat sludge as a waste. Its treatment method mainly focuses on how to eliminate hazards and reduce volume. Due to the shortage of land resources and the increase of environmental pressure, it has been gradually reduced or banned; due to the Containing nitrogen and phosphorus and other components in sludge, agricultural use of sludge has been valued and applied in many countries, but there is a potential danger of heavy metals in sludge polluting soil and crops

Method used

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  • Integrated technology of thermal decomposing, dry distilling and gasifying sludge and preparing of ceramsite
  • Integrated technology of thermal decomposing, dry distilling and gasifying sludge and preparing of ceramsite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the urban sludge with a moisture content of 80% to 90% is dehydrated through a plate filter press (1) to a moisture content of 50-60%, the dewatered sludge: coal powder: cement: fly ash: plant The mass ratio of fiber=68%: 14%: 6%: 10%: 2% is taken, and placed in storage bins (3), (4), (5), (6), (7) respectively; after that Transport it to the homogenization bin (8) for mixing, and then send it to the mixer (9) to mix evenly; then lift it to the extrusion pelletizer (11) through the elevator (10) to extrude the mixture to prepare granules Sludge pellets with a diameter of 10-20mm.

[0026] The sludge balls are sent to the drying kiln (13) through the transmission belt (12) and dried until the moisture content is 8-12%, and the drying temperature is 150-180°C; the dried sludge balls are then passed through the elevator (14 ) is transported to the pyrolysis dry distillation gasifier (15) for reaction.

[0027] The inside of the pyrolysis dry distillation gasifier (...

Embodiment 2

[0033] After the urban sludge with a moisture content of 80% to 90% is dehydrated through a filter press to a moisture content of 50-60%, the dewatered sludge: coal powder: cement: fly ash: plant fiber = 80% : The mass ratio of 9%:4%:6%:1% is taken.

[0034] The rest are operated according to Example 1 to obtain light and high-strength ceramsite and recycle combustible gas C m h n 、H 2 and CO, etc.; the waste heat when the ceramsite is cooled is used as the heat when the sludge pellets are dried in the kiln.

Embodiment 3

[0036] After the urban sludge with a moisture content of 80% to 90% is dehydrated through a filter press to a moisture content of 50-60%, the dewatered sludge: coal powder: cement: fly ash: plant fiber = 88% : The mass ratio of 6%:2%:3%:1% is taken.

[0037] The rest are operated according to Example 1 to obtain light and high-strength ceramsite and recycle combustible gas C m h n 、H 2and CO, etc.; the waste heat when the ceramsite is cooled is used as the heat when the sludge pellets are dried in the kiln.

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Abstract

The invention discloses an integrated technology of thermal decomposing, dry distilling and gasifying sludge and preparing of ceramsite. By utilizing the method disclosed by the invention to process the sludge in a city, retained heat in the sludge in the city and utilization values of inorganic components can be fully achieved; and moreover, a lightweight heat insulation building material can be obtained while the sludge is processed in a harmless manner; and harmlessness, reduction and resource utilization of the sludge of a sewage plant in the city can be achieved.

Description

technical field [0001] The invention relates to an integrated technology of sludge pyrolysis, carbonization, gasification and ceramsite preparation, and belongs to the field of environmental protection. Background technique [0002] According to reports, my country's urban sewage discharge has reached 5.11×10 4 billion tons per year, and the amount of sludge accounts for about 0.3%-0.5% of the treated water, and the annual discharge is huge. Municipal sludge contains some heavy metals, pathogenic bacteria and toxic organic substances, which will cause environmental hazards such as land pollution, rot, odor, and groundwater pollution; but at the same time, urban sludge is also rich in biological sources, organic matter and some inorganic components, which can be resource utilization. The technology of harmless disposal and resource utilization of sludge has always been a hot topic of research at home and abroad. [0003] At present, domestic and foreign, municipal sludge t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/10C04B33/132C04B33/32
CPCY02P40/60Y02W10/40
Inventor 张磊杨久俊赵明银王雪平杨沛森赵誉余海燕曲烈
Owner TIANJIN URBAN CONSTR COLLEGE
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