Household garbage co-processing system of cement kiln furnace

Abstract

The invention relates to a household garbage co-processing system of a cement kiln furnace, which comprises a garbage storage system, a leachate treatment system, a garbage incineration system, a smoke exchange system and an afterheat power generation system. Smoke generated by a garbage incineration furnace enters from the upper part of a kiln tail smoke chamber; and smoke with the same working condition volume is extracted from the lower part of the kiln tail smoke chamber to enter the afterheat power generation system for power generation. High-temperature environments in the kiln tail smoke chamber (1100 DEG C) and a decomposition furnace (800-900 DEG C) are used for incinerating and decomposing the smoke to achieve the purpose of thoroughly eliminating dioxin in the smoke; and meanwhile, a traditional air release principle for dealing with the chloride alkali sulfur harm is used for extracting out the smoke with the same working condition volume to reduce the content of chloride ions of hot raw materials entering a kiln and to increase the mass of cement clinkers. Larger particles in the smoke enter a rotary kiln along with the raw materials for curing in a cement clinker crystal structure; and the system needs no garbage smashing and smoke purification, and realizes harmless treatment of solid, liquid and gas urban garbage.

Description

technical field [0001] The present invention relates to the field of urban domestic waste treatment, in particular to a system for co-processing domestic waste by cement kilns. Background technique [0002] With the continuous development of the city, the discharge of urban domestic waste is also increasing, with an annual growth rate of 9%. The waste occupies a large amount of land and poses a serious threat to the ecological environment around the city, which needs to be treated urgently. At present, there are four main ways to deal with municipal solid waste: landfill, composting, and incineration. At present, sanitary landfill is the main method in my country. Garbage incineration will produce harmful gases and residues, which will easily cause secondary pollution, so it is controversial. The unique production process of the cement plant (alkaline environment and high temperature of about 1000 ℃) provides excellent conditions for the treatment of urban waste. Utilizing ...

AI Technical Summary

Problems solved by technology

[0006] 3. There is also a technology to put the county and town domestic waste into the kiln tail smoke chamber through the 5-level feeding pipe for incineration, and then extract the steam and flue gas generated by the incineration for waste heat power generation. Since there is no separate waste incineration equipment, this method does not It is suitable for the current urban domestic waste with complex composition. Municipal waste cannot be incinerated completely in the kiln tail smoke chamber. The residue entering the rotary kiln will seriously affect the quality of cement. Moreover, the water vapor generated by incineration is not easy to control. After entering the calciner or preheater, it will increase energy consumption

Images