Method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge

Abstract

The invention discloses a method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge. The method comprises the following steps of: 1) using an induced draught fan to send hot fume discharged from a brickkiln respectively to a first sludge drying and granulating device and a second sludge drying and granulating device, for purpose of two-stage sludge drying; 2) stacking urban sludge in a sludge storage warehouse and carrying out pretreatment prior to the drying; 3) using a component-type feeder to send the pretreated sludge into the first sludge drying and granulating device, for purpose of first-stage sludge drying; 4) using a conveyor to send the sludge after the first-stage sludge drying into the second sludge drying and granulating device, for purpose of second-stage sludge drying; and 5) granulating the sludge after the second-stage sludge drying; before the entrance into a sludge finished product warehouse, using a screening and separating device to uniformly mix sludge grains with brick-making clay or shale soil; and making adobes and sintering the adobes into light and energy-saving bricks. In the method, waster materials are usedfor treating waster materials, so that the urban sludge is harmlessly treated and recycled, and remarkable social and economic effects can be generated.

Description

technical field [0001] The invention relates to an integrated method of drying sludge by utilizing waste heat of flue gas from a brick kiln and making bricks from the sludge. Background technique [0002] In order to protect our limited water resources and create a good living environment, domestic sewage and industrial wastewater must be treated by sewage treatment plants, and can only be discharged after reaching the national sewage discharge standards. Whether there is an urban sewage treatment system has become a modern urban civilization. It is also an indispensable environmental engineering measure for urban ecological environment construction. According to the "Eleventh Five-Year Plan" of the national environmental protection and the "Eleventh Five-Year Plan" for the construction of urban sewage treatment and recycling facilities nationwide, all cities in my country must build sewage treatment facilities by 2010, and the urban sewage treatment rate should not be lower...

AI Technical Summary

Problems solved by technology

[0007] Referring to the practice of sludge incineration abroad, some places try to achieve the purpose of sludge incineration through incineration. However, the investment in sludge incineration equipment is high, the energy consumption is large, and the operation cost is expensive. The cost of sludge incineration is 400 yuan. In addition, the incineration of sludge will bring pollution to the atmospheric environment and the residue after incineration still needs to be disposed of. According to my country's national conditions, sludge incineration is economically unaffordable and technically not yet feasible. Complete

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