Process for making bricks by sludge

Abstract

The invention discloses a process for making bricks by sludge. The process comprises the following steps: carrying out semi-drying on the sludge and preparing other raw materials; conveying the prepared materials into a strong extruding agitator to be mixed; rolling and homogenizing a mixture by a strong wheel mill and conveying the mixture into an aging room to be aged; putting the aged material into a mixed type fine crusher to be homogenized; sequentially putting the homogenized material into a double-shaft agitating extruder and a double-stage vacuum extruder to be prepared into a sludge strip; cutting the sludge strip into blanks by an automatic slitting and blank cutting machine and molding; conveying the molded brick blanks into a drying room to be dried; and putting the dried brick blanks into a tunnel kiln to be sintered. According to the process for making the bricks by the sludge, the mixed materials are agitated sufficiently and uniformly and the prepared bricks are light, have many pores and have the advantages of certain sound insulation and heat insulation effects and the like; the self heating amount of the municipal sludge is utilized sufficiently, reasonably and effectively.

Description

technical field [0001] The invention belongs to the harmless treatment and resource utilization technology of urban sludge, in particular to a sludge brick-making process. Background technique [0002] Municipal sludge refers to the solid waste generated during the treatment of urban domestic sewage and industrial wastewater, and is a regular product of urban sewage treatment plants. This sludge has a high water content, is perishable, has a strong odor, and contains toxic substances such as dioxins, bacteria, parasite eggs, and heavy metals. Most sewage plants and construction units just send the sludge to the landfill or directly expose it to the wilderness, causing secondary pollution. [0003] With the increasing amount of urban sewage discharge, more and more sludge is deposited, and sludge treatment is very difficult. At present, the methods of sludge disposal in my country are landfill, incineration, and land utilization. None of the disposal methods can comprehens...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, it cannot be fully stirred evenly when stirring, and the bricks produced will agglomerate, which affects the strength and is easy to brittle.