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Method for improving pyrolysis carbonization and adsorption performance of sludge

A technology of adsorption performance and pyrolysis of carbon, applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., to achieve good economic and social benefits, reduce ash content, and improve the degree of automation

Active Publication Date: 2018-05-15
BEIJING DRAINAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at problems such as the treatment and resource utilization of urban sewage treatment plant sludge, the purpose of the present invention is to: propose a method for improving the adsorption performance of sludge pyrolysis carbonization, which is a deep dehydration of sludge, sludge The process technology of composting and sludge pyrolysis resource integration effectively solves the problem of connecting sludge composting treatment and pyrolysis process, and can effectively realize the reduction, harmlessness and resource utilization of sludge, which is conducive to promoting my country's Development of Sludge Treatment and Disposal in Urban Domestic Sewage Treatment Plants and Improvement of Environmental Protection Technology

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  • Method for improving pyrolysis carbonization and adsorption performance of sludge

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Embodiment 1

[0053] The sludge produced by a municipal sewage treatment plant has a moisture content of 97% and an organic content of 70%. The sludge pyrolysis carbon 200kg / t absolutely dry sludge and polyacrylamide 2kg / t absolutely dry sludge are added to the sludge in the regulating tank. After stirring for 30 minutes, it is pumped into the dehydrator for deep dehydration, and the moisture content is 55. %. The deeply dehydrated sludge is transported to the sludge pyrolysis furnace for pyrolysis reaction, the pyrolysis temperature is controlled at 350-400°C, and the reaction time is 60 minutes. Take pyrolysis carbon with a particle size in the range of 1mm-2mm as the raw material for granulation, and its specific surface area is 18m 2 / g, the addition of pyrolysis oil is 150kg / t of pyrolysis carbon, the addition of KOH is 0.5kg / t of pyrolysis carbon, granulate 1cm, heat up to 700℃ at 5℃ / min in the activation furnace, activate for 2h, And then in CO 2 After cooling in the atmosphere, the ...

Embodiment 2

[0055] The sludge produced by a municipal sewage treatment plant has a moisture content of 97% and an organic content of 70%. Add 300kg / t absolute dry sludge with pyrolysis carbon of sludge and 1.5kg / t absolute dry sludge with polyacrylamide to the sludge in the regulating tank. After stirring for 30 minutes, pump into the dehydrator for deep dehydration, and obtain the moisture content 54%. The deeply dehydrated sludge is transported to the sludge pyrolysis furnace for pyrolysis reaction, the pyrolysis temperature is controlled at 400-450°C, and the reaction time is 60min. Take pyrolysis carbon with a particle size in the range of 1mm-2mm as the raw material for granulation, with a specific surface area of ​​20m 2 / g, pyrolysis oil addition amount is 180kg / t pyrolysis carbon, KOH addition amount is 0.8kg / t pyrolysis carbon, granulate 1.0cm, heat up to 700°C at 5°C / min in an activation furnace, activate for 2h , And then in CO 2 After cooling in the atmosphere, the specific su...

Embodiment 3

[0057] The sludge produced by a municipal sewage treatment plant has a moisture content of 97% and an organic content of 70%. Add 300kg / t absolute dry sludge with pyrolysis carbon of sludge and 1.5kg / t absolute dry sludge with polyacrylamide to the sludge in the regulating tank. After stirring for 30 minutes, pump into the dehydrator for deep dehydration, and obtain the moisture content 54%. The sludge after deep dehydration is transported to the sludge pyrolysis furnace for pyrolysis reaction, the pyrolysis temperature is controlled at 400-450°C, and the reaction time is 60min. Take pyrolysis carbon with a particle size in the range of 1mm-2mm as the raw material for granulation, and its specific surface area is 20m 2 / g, the addition of pyrolysis oil is 120kg / t of pyrolysis carbon, and the addition of KOH is 1.0kg / t of pyrolysis carbon, granulate 1.0cm, heat up to 700°C at 10°C / min in an activation furnace, activate 2.0 h, and then in CO 2 After cooling in an atmosphere, the...

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Abstract

The invention provides a method for improving pyrolysis carbonization and adsorption performance of sludge. The method involves processes such as sludge drying, sludge pyrolysis, sieving, granulatingand activating. The method is a process technology which integrates sludge deep dewatering, sludge composting as well as sludge pyrolysis and recycling, effectively solves the problem of sludge compost treatment and pyrolysis process connection, and can effectively realize sludge reduction, hazard-free treatment and recycling, thus being beneficial to promotion of the development of sludge treatment and disposal as well as improvement of environmental protection technologies of urban domestic sewage treatment plants in China. The pyrolytic carbon produced by the process can be used for sewagetreatment, soil improvement, soil pollution control and remediation, removal of odorous gases, and the like, so that the reduction, hazard-free treatment and recycling of urban domestic sludge can berealized; therefore, the method has a very wide application prospect and can produce tremendous social and economic benefits.

Description

Technical field [0001] The invention belongs to the technical field of sludge treatment in urban sewage treatment, and particularly relates to a method for improving the pyrolysis and carbonization adsorption performance of sludge. Background technique [0002] With the improvement of the level of urbanization in my country, the large-scale construction and operation of urban sewage treatment plants, and the continuous improvement of sewage collection rate and treatment level, the production of urban sludge in my country has increased rapidly year by year; in 2008, urban sewage treatment plants in operation nationwide There are 1529 buildings with a sewage treatment capacity of 23.3 billion cubic meters, producing about 16 million tons of sludge with a moisture content of 80%; as of 2014, the urban sewage treatment capacity has reached 160 million m 3 , The number of urban sewage treatment plants has reached 3362. In the process of urban sewage treatment, sewage can be discharged ...

Claims

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Application Information

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IPC IPC(8): C02F11/00B01J20/20B01J20/30
CPCB01J20/20C02F11/00
Inventor 付兴民阜崴文洋张静慧常菁马富亮李伟
Owner BEIJING DRAINAGE GRP CO LTD