Method for treating sludge with cement kiln and cement kiln system for treating sludge with grate cooler

Abstract

The invention discloses a method for treating sludge by a cement kiln and a cement kiln system for treating sludge by a grate cooler. The method comprises the steps: preparing dry sludge particles through wet sludge; heating the dry sludge particles through high temperature clinkers discharged from the cement kiln to prompt the combustion of the dry sludge particles; then feeding smoke into a third air system of the cement kiln; and feeding the combusted sludge particles and heated clinker into a cement grinding mill system. The cement kiln system comprises the cement kiln, and the grate cooler which communicates with the cement kiln through a head cover; the head cover communicates with the cement kiln through a third air pipeline; and a sludge feeding opening is formed in the head cover and communicates with a dry sludge particle storage through a dry sludge particle conveying device. With the adoption of the method and cement kiln system, the sludge can be treated massively, and the daily treatment capacity reaches 200t / d.

Description

technical field [0001] The invention relates to a method and system for treating sludge, in particular to a method for treating sludge with a cement kiln and a cement kiln system for treating sludge with a grate cooler. Background technique [0002] The cement industry is one of the largest energy consumers in my country's industrial field, accounting for 6.5% of the country's total energy consumption. The fuel consumption of the cement industry accounts for 75% of the total energy consumption of the cement industry, while coal accounts for nearly 100% of the total fuel consumption. Seeking to use alternative fuels is in line with the strategy of my country's energy structure optimization and cement industry capacity replacement. [0003] With the construction of urban sewage treatment facilities, sewage sludge and sewer sludge have become a new urban environmental problem. The moisture content of the sludge after mechanical dehydration in the sewage plant is about 80%. C...

AI Technical Summary

Problems solved by technology

In the prior art, the main common point of using cement kiln to treat sludge is to transport the sludge from the sewage plant to the cement plant first, and then use the waste heat of the cement kiln to dry and deodorize the sludge and directly burn it into the decomposition furnace. Agglomeration and uneven distribution, small disposal scale, and high energy consumption

Images