Preparation method for combustion gas by using ground and extruded straw-slack cylindrical particle to substitute lump coal

Abstract

The invention provides a preparation method for combustion gas by using a ground and extruded straw-slack cylindrical particle to substitute lump coal. According to the method, straw and slack are ground and extruded at a high temperature so as to obtain the cylindrical particle which includes no binder and a small amount of moisture, the phenomenon of explosion and breaking with heat does not occur when the cylindrical particle enters into a high temperature combustion gas generation furnace, the cylindrical particle reacts with steam, hydrogen content in produced combustion gas is greater than 30%, and when the combustion gas is applied to an internal combustion engine, efficacy is improved by 25% due to detonation performance of hydrogen; and after cooling of the cylindrical particle obtained by extruding straw and slack having undergone grinding at grinding temperatures of more than 270 DEG C and more than 320 DGE C, respectively, a semi-coked granular fuel with little smoke is obtained. The method provided by the invention overcomes disadvantages of the prior art.

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...

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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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