Drying-pyrolysis integrated vertical furnace

Abstract

The invention discloses a drying-pyrolysis integrated vertical furnace. According to the vertical furnace, a 3-30 section three-dimensional space inner baffled (in the shape of continuous S) operation conveyor belt is used as a material conveying device, high-temperature gas (or high temperature flue gas) is used as a gas heat carrier for multiple-step staggered countercurrent-type heat exchange with material coal or biomass, and drying, low temperature pyrolysis and medium-high temperature pyrolysis of the material coal or biomass are realized from top to bottom step by step through bottom-to-top temperature gradient of the gas heat carrier. The vertical furnace has a wide material particle size application range, realizes drying-pyrolysis integration of the material coal or biomass in the same furnace, effectively uses flue gas produced by material coal or biomass pyrolysis to cool hot semicoke at the outlet of the vertical furnace or to adjust and control the temperature of the gas heat carrier, improves a thermal energy utilization rate of the vertical furnace, has a simple design, can be flexibly and simply operated, realizes a low investment cost and is easy to industrialize.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a vertical furnace integrating drying and pyrolysis. Background technique [0002] my country's energy situation of "rich in coal, poor in oil, and low in gas" determines that my country will continue to use coal as the main body of energy consumption for a long time in the future. Coal pyrolysis can produce gas (coal gas), liquid (tar) and solid (semi-coke or coke) products in three phases, which can realize clean and efficient comprehensive utilization of coal resources, and is an effective way to develop high value-added coal chemical industry . [0003] Many countries are developing their own unique coal pyrolysis technology, such as the Garrett process and Toscoal process in the United States, the LR process in Germany, the coal rapid pyrolysis process in Japan, the fluidized bed coal rapid pyrolysis process in Australia, the former Soviet Union The ETCH-1...

AI Technical Summary

Problems solved by technology

However, the LR process has certain limitations in terms of coal particle size (applicable particle size range is 20-80mm), and both powdery lignite and bituminous coal need to be pre-briquetted, and the design of the pyrolysis furnace device is complicated and the investment is large.

In addition, there are few reports on devices or equipment that use the heat carried by the pyrolysis gas generated by coal or biomass pyrolysis to dry raw coal or biomass

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