Lignite drying and carbonization quality-improving tower with reciprocating and turning-back rolling bed

Abstract

The invention relates to a lignite drying and carbonization quality-improving device, in particular to a lignite drying and carbonization quality-improving tower with a reciprocating and turning-back rolling bed. In the quality-improving tower, a drying and carbonization reaction chamber is surrounded by a furnace lining; the top of the reaction chamber is provided with a coal conduit, and the inside of the reaction chamber is divided into multiple layers of drying chambers and multiple layers of carbonization chambers from top to bottom; each drying chamber and each carbonization chamber areprovided with an air inlet and an air outlet for introducing and discharging drier or carbonization agent; and each inclined reciprocating grate is installed in each drying chamber and each carbonization chamber, the inclination directions of the reciprocating grates form staggered arrangement from top to bottom, each reciprocating grate is provided with an eccentric drive device, an interlay barrier below the tail part of each reciprocating grate is provided with an interlayer coal seal, a coke quenching tank is connected to the lower part of the interlay coal seal of the carbonization chamber at the bottom layer, and a coal discharging screw conveyer is arranged at the bottom part of the coke quenching tank. The invention solves the problems of raised dust and gas explosion, poor coal layer air permeability, low gas-solid heat transfer efficiency, raw coal burst, nonuniform coal layer temperature and poor regulation and control maneuverability for different sections existing in the traditional lignite drying and carbonization device.

Description

technical field [0001] The invention relates to lignite drying and distillation upgrading equipment, in particular to a reciprocating and reciprocating rolling bed lignite drying and distillation upgrading tower. Background technique [0002] At present, the known lignite drying and distillation upgrading equipments include vibrating bed, fluidized bed, mesh-belt moving bed and drum upgrading. The above-mentioned lignite drying and dry distillation upgrading equipment still have the following problems: [0003] 1. Brokenness problem in lignite drying process. [0004] During the heating process of lignite, the vaporization of the water inside the coal block causes the internal pressure of the coal block to rise. When the heating rate reaches a certain level, the vaporization speed of the water inside the coal block exceeds the diffusion speed of water vapor in the capillary from the inside to the outside, and the internal pressure If the value is too high, the coal block w...

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Problems solved by technology

[0013] The present invention aims to solve many problems existing in the known lignite drying and dry distillation upgrading equipment in terms of gas and coal dust explosion, long-distance transportation of quality upgrading products and equipment mobility, and provides a reciprocating and reciprocating rolling bed The lignite dry distillation upgrading tower can simultaneously solve the problems of dust gas explosion, poor gas permeability of coal seam, low gas-solid heat transfer efficiency, raw coal burst, uneven temperature of coal seam and poor control mobility in different sections

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