A grate cooler waste heat recovery and utilization system

Abstract

The invention particularly relates to a waste heat recycling system for a grate cooler. The waste heat recycling system for the grate cooler comprises a grate cooler, a rotary kiln, a preheating tower, a dust primary separating tower, a dust advanced separator and a waste heat recovery control system, wherein the grate cooler is composed of a section I, a section II and a section III, the sectionI, the section II and the section III of the grate cooler are correspondingly provided with air suction ports and are connected with ventilating ducts; the preheating tower is composed of an upper section preheating tower and a lower section preheating tower, and a plurality of dust funnels are arranged in the preheating tower; the ventilating duct of the section I of the grate cooler is connectedwith the dust advanced separator, a waste heat power generating device is arranged on the ventilating duct of the section I of the grate cooler, the ventilating duct of the section III of the grate cooler is connected to the dust funnel of the upper section of preheating tower, and the ventilating duct of the section II of the grate cooler is connected in the dust funnel of the lower section preheating tower. The waste heat recycling system for the grate cooler has the advantages of high recovery rate of waste gas of the grate cooler, low cost, good economic benefit, high efficiency, environmental protection, safety and reliability.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization of grate coolers, in particular to a waste heat recovery and utilization system of grate coolers. Background technique [0002] With the development of construction technology, cement has also become an indispensable raw material in the construction industry. The grate cooler is an important host equipment in the clinker firing system of a cement plant. Its main function is to cool and transport cement clinker, and at the same time provide hot air for the rotary kiln and calciner. It is the main heat recovery system for the firing system. equipment. [0003] The grate cooler is a sudden cooling type cooler. After the clinker enters the grate cooler from the rotary kiln, a material layer of a certain thickness is spread on the grate plate, and the cold air blown in passes through the grate bed in a direction perpendicular to each other. The moving material layer makes the clinker q...

AI Technical Summary

Problems solved by technology

[0004] At present, in the existing technology, in order to utilize the waste heat of the exhaust gas of the grate cooler, the method of recycling power generation is generally adopted, but the recovery and utilization of the waste heat of the waste gas of the grate cooler in the prior art generally have the disadvantages of low waste heat recovery utilization rate and low benefit ; and the dust content contained in the exhaust gas of the grate cooler is relatively high, and the treatment of the dust contained in the exhaust gas of the grate cooler is relatively troublesome, which increases a lot of costs; at the same time, the temperature difference of the high-heat gas formed by the three-stage cooling in the grate cooler is large If separate treatment is not adopted, the recycling rate of the waste gas from the grate cooler will be further reduced, which will significantly reduce the economic benefits. If the waste gas from the grate cooler is not fully recycled and discharged into the atmosphere, it will cause waste of resources and environmental pollution

Images