Curing agent for solidification/stabilization of dewatered sludge of sewage plant and application of curing agent

Abstract

Disclosed are curing agent for solidification / stabilization of dewatered sludge of a sewage plant and application of the curing agent. Chemical components of the curing agent includes, by mass, from 3 to 8 parts of SiO2, from 25 to 35 parts of Al2O3, from 32 to 43 parts of CaO, from 15 to 23 parts of SO3, from 1 to 3 parts of Fe2O3 and from 0.1 to 0.3 part of Li2O. After the curing agent is added into the dewatered sludge, solidification materials quickly react with moisture in the dewatered sludge to form a needle-shaped framework, and accordingly the strength of solidified sludge is improved. Besides, the yield of products is increased along with reaction, the specific surface area of the products is large, the products have a high adsorption effect, and effects of stabilization and pollutant sealing are achieved along with increase of compactness of solidified bodies.

Description

technical field

[0001] The invention relates to a curing agent for solidification / stabilization treatment of dewatered sludge in a sewage plant and an application thereof. Background technique

[0002] At present, there are many technologies for sludge treatment and disposal in my country, such as landfill, incineration, composting, etc., but the most easily accepted by my country's national conditions is sludge pretreatment and landfill, which can not only ensure the harmless treatment of sludge, but also In line with the current economic level of our country. The common method of pretreatment landfill is sludge solidification / stabilization treatment technology, which has been applied on-site in Guangdong, Jiangsu, Zhejiang and other places. During the application process, it was found that due to the limitation of the curing age of the traditional curing agent (the general age is 3 days), the treatment site occupies a large area, and the treatment is easily affected by the...