Novel sludge brick making technique

Abstract

The invention discloses a novel sludge brick making technique which comprises the following steps that municipal sludge is subjected to dewatering conditioning and desodoration treatment; heavy metal is controlled; treated sludge pug, clay and an additive are blended to form a material; the material is fed into a brute force extrusion mixer to be mixed fully, and is ground and homogenized by brute force roll grinding and aged; the aged brick making pug is fed into an adobe making workshop to be subjected to compression moulding for adobe making; the moulded adobes are fed into a drying room to be dried; and the dried adobes are placed in a back stage of a tunnel kiln to be sintered. According to the technique, the sludge from a sewage plant is mixed with the raw clay directly, so that energy resources consumed due to sludge drying are saved; targeted improvement measures are put forwards to solve the problems of sludge dewatering, odor control, heavy metal stabilization, etc.; the quality performance and the strength grade of sludge bricks are improved by methods of optimizing a sludge blending ratio and feeding the additive, etc.; the reduction, harmlessness, reclamation and industrialization treatment goals on the municipal sludge are realized; and the sludge bricks, serving as a product, have objective economic benefits.

Description

Technical field [0001] The invention belongs to the technical field of harmless treatment and resource utilization of urban sludge, and also belongs to the technical field of building materials, and particularly relates to a novel sludge brick making process. Background technique [0002] Municipal sludge refers to the solid waste produced during the treatment of urban domestic sewage and industrial wastewater. It is a regular product of urban sewage treatment plants. This sludge has high water content, is perishable, has a strong odor, and contains two Evil causes, bacteria. Toxic substances such as parasite eggs and heavy metals. Most sewage treatment plants and construction units simply send the sludge to landfills or directly expose them to the wilderness, causing serious secondary pollution. [0003] With the increasing amount of urban sewage discharge, the amount of sludge produced by sewage treatment is also increasing year by year, and sludge treatment is facing many prob...

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Problems solved by technology

[0007] In order to overcome the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of novel sludge brick-making process, directly mix the sludge from sewage plant with clay raw material, save the energy consumed because of sludge drying; To solve the problems of sludge dehydration, odor control, heavy metal stability, etc.; and through the optimization of sludge mixing ratio, adding additives and other methods to improve the quality performance and strength level of sludge bricks, to achieve the urban sludge The treatment goals of reduction, harmlessness, resource utilization and industrialization, as a product, sludge bricks have objective economic benefits

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