Method for exchanging heat using cement kiln high-temperature flue gas as heat source

Abstract

The invention relates to a heat exchange method with cement kiln high-temperature flue gas as heat source, which is characterized in that extracting partial high-temperature flue gas with temperature of 850-1100 DEG from high-temperature low-negative pressure regions of a cement kiln pre-decomposition kiln such as flue gas chamber and decomposing furnace outlet, dedusting the high-temperature flue gas, and performing heat exchange with flowing heating medium on a heat exchanger, the high-temperature flue gas is cooled and discharged, and the heating medium is heated for supplying heat. The invention utilizes high-temperature flue gas generated in cement production process as heat source for drying waste containing organic substances, changes partial key heating components of the cement kiln system without influence on cement production, and is capable of removing partial harmful components to cement production such a chlorine and alkali metals by using the gas extraction pipes and the heat exchanger, so as to optimize the process control and process regulation means of cement production.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a heat exchange method using high-temperature flue gas from a cement kiln as a heat source. Background technique [0002] At present, the disposal of organic waste and the preparation of alternative fuels are hotspots in the research of combustion science and industrial application technology. The drying and dehydration of organic waste usually requires more heat sources, and traditional waste heat cannot fully meet the drying requirements of organic waste such as sludge. Chemical heat demand. Utilizing waste as fuel is a direction for the development of cement alternative fuels. With the increasing improvement of China's water treatment market, sludge incineration and disposal will become the mainstream method of sludge disposal and utilization, and the use of cement kilns to incinerate dried sludge is also inevitable. It will become a major way of slud...

AI Technical Summary

Problems solved by technology

However, the waste heat temperature of the general cement production system is low. As a heat source for drying waste containing organic matter, the drying capacity is limited. Therefore, the large-scale disposal of waste in cement kilns and the scale of replacing fuel containing organic matter are greatly restricted.

Images