Compare tunnel kiln and rotary kiln

Tunnel kilns are continuous kilns that are well utilized by heat, but most combustion kilns currently used in tunnel kilns use either natural wind or cold air blowing in the cooling zone to heat the air. Although the use of waste heat, but because of the hot air extracted, mixed with a lot of high temperature with the combustion of exhaust gas, resulting in combustion air oxygen deficiency, poor combustion. There are not many internal tube bundles inside the kiln. Hot flue gas, steam or heat transfer oil are used in the kiln. The raw gypsum is evenly added into the rotary kiln, and the material outside the tube bundle is indirectly heat-exchanged with the hot flue gas in the tube bundle in the kiln. The tube bundle has a very large heat exchange area and rotates with the kiln to force the material to be forced to stir. Gypsum powder in this mechanical stirring and dehydration of gypsum dehydration released by the common role of water vapor, constantly rolling and hot flue gas full heat exchange, dehydrate the gypsum crystal water, gradually become hemihydrate gypsum. The calcination temperature of gypsum is about 160 ° C, and the calcination cycle of gypsum is about several dozen minutes. The lower temperature difference between the hot flue gas and the gypsum and the longer gypsum residence time make the plaster obtain a very good phase component. Henan Zhengzhou Mining Machinery Co.,Ltd. always adhere to the quality of life, with science and technology development business philosophy; Promote technological innovation, high quality, first-class service principle, the production of high-quality rotary kiln equipment, in order to meet the potential demand of customers and continue to struggle. If you have any questions you can call our factory direct telephone consultation, we have a professional technical and technical personnel to answer your questions. Welcome customers to consult our company to buy products.