System for drying and handling sludge with waste gas from cement production

Abstract

The invention discloses a system for drying and handling sludge with waste gas from cement production and is characterized in that the system comprises a novel dry-method cement clinker firing system, a wet sludge drying system, a dry sludge storage and cement kiln feeding system, an electrical dragging and automatic control system; the gas inlet pipe and the gas outlet pipe of a sludge dryer of the wet sludge drying system are both connected with a cooler of the cement clinker firing system; the dry sludge storage and cement kiln feeding system is connected with a cement kiln exhaust decomposing furnace or an uptake flue; and the sludge dryer is a rotary sludge dryer with chains. The system makes full use of the high-temperature waste gas of the cement cooler to dry the sludge, the drying waste gas returns to the cooler, the waste gas is dried by the high-temperature purified sludge, and the dried sludge is burned in the cement kiln, so that the harmful substances are decomposed, theheat energy is used for cement firing and the burning ash forms cement. Therefore, the system achieves the effect of pollution-free full-utilization disposal of sludge and is significant in environmental and economic benefits.

Description

[0001] technical field [0002] The invention relates to the field of sludge treatment and disposal, in particular to a system for drying sludge with waste gas produced by cement for cooling clinker and putting it into a cement kiln for incineration and disposal of sludge. Background technique [0003] With the rapid development of the sewage treatment industry, the continuous improvement of urban sewage treatment capacity and sewage treatment rate, the sludge output of sewage treatment plants has also increased. According to the survey, the sludge in most sewage treatment plants is simply disposed of in disorderly stockpiles or simply landfilled after simple treatment. The current actual treatment and disposal rate of sludge is less than 30%, and less than 10% of the sludge is treated and disposed of in a harmless manner. %, most of them have not been properly disposed of, which will seriously affect the effect of my country's construction of urban sewage treatment plants...

AI Technical Summary

Problems solved by technology

Some people also introduce the hot air of the cooler into the dryer to dry the sludge, and the exhaust gas after drying is discharged into the atmosphere after dust removal. Since the temperature of the drying process is low (<400°C), the temperature of the exhaust gas is below 100°C. Harmful gases (odor, etc.) in the sludge during the drying process are not eliminated, but will increase, making the odor very strong in the surrounding area and forming new pollution; if the organic gases such as odor in the exhaust gas are removed , which is expensive to process and economically difficult to run

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