A method for producing gas by grinding and extruding straw and shaving coal columnar particles instead of lump coal

Abstract

The invention provides a method and a device for preparing gas by large-scale grinded and squeezed straws and broken coal granules instead of lump coal and coke. A grinding and squeezing hole plate is internally provided with a grinding groove and three rows of squeezing holes. In order to achieve high-yield capacity, the depth of the grinding groove is designed to be 15-25mm, and the width of the grinding groove is designed to be matched with the thickness (width) of a grinding wheel; the broken straws and broken coal are uniformly rotated, grinded and cut in the groove; the groove is internally provided with three rows or multiple rows of squeezing holes; the space between the upper row and the lower row of outer squeezing holes is 4-6mm; the squeezing holes of the same diameter are arranged at the tangential position of the radius of middle staggered round holes; and the number of rollers blocked by the straw and the broken coal is reduced. Not only are the effective discharge areas of the squeezing holes increased, but also the discharge yield of granules formed by the broken straw of the squeezing holes is also improved; and the efficiency of granulators of six groups of grinding wheels is improved by ten times.

Description

technical field [0001] Straw, branches, plant stalks (referred to as straw), when all kinds of coal foam is heated at a high temperature of 150-600 ℃, the column particles are extruded and directly put into the pressurized gasifier to replace lump coal, coke or straw briquettes Preparation of environmentally friendly and energy-saving gas to promote gas turbine-steam turbine combined cycle power generation and smog reduction. technical background [0002] During the coal mining process, only 20% of the coal is strictly screened to become lump coal for chemical industry and gasification. The limited refined lump coal is prepared into gas in the gasifier; the goals of coal gasification, improvement of coal energy efficiency, saving of coal and pollution reduction are realized. The feature of lump coal is that after the gasification reaction in the furnace, it forms a honeycomb that is still in the shape of lump coal and can carry it. Using this honeycomb structure, the incomi...

AI Technical Summary

Problems solved by technology

The second is that the surface, corners, and lingering of the lump coal are prone to sticking and bonding when exposed to high temperature heat, causing a bridging in the furnace and affecting the normal operation of the gasifier. Waiting for the surface oxidation of the lump coal to gradually inward and slow down the gasification speed

[0003] Using straw or briquettes for gasification in the furnace has not been used in gas turbine power plants so far. The main reason is that the straw is gasified and decomposed into powder ash after being put into the gasifier, which cannot form a honeycomb ash slag disordered layer. Blowing in air becomes straw incineration, and cannot input steam to mix and carry out reduction reaction to absorb part of the heat energy

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