Nitrogen-free hot gas dry distillation method for preparing particles from crushed bituminous coal straw

Abstract

The invention provides a dry distillation device and a dry distillation method of preparing granular nitrogen-free hot gas from crushed bituminous coal and straw. The method includes following steps: (a) adding water to crushed bituminous coal, the straw, garbage or sludge raw material until the water content reaches 15-30%; (b) performing primary grinding, blending and extrusion to mould basic powder sludge granules; (c) feeding the basic powder sludge granules into a mould cylindrical granulation machine for grinding and blending again to extrude cylindrical or rhombic granules; (d) feeding the granules through a mechanical sealed method into a material guide cylinder, or arranging the granulation machine on the upper end of a semi coke furnace cover so that extruded granules are fallen into a dry distillation chamber of the furnace through the material guide cylinder; and (e) performing dry distillation to obtain semi coke which contains very low tar and volatile components. During the production process, the content of sulfur in coal is reduced to obtain clean smoke-free, tar-free and low-sulfur semicoke bituminous coal for replacing lump coal which is few in resources and coke which is expensive. The method not only maintains that the dry distillation releases semi coke fuel gas but also is added by nitrogen-free fuel gas which is generated through reduction neutralization of nitrogen-free hot gas with high-temperature semi coke with the quantity of 100-300 m<3> per ton of coal, thereby reducing the consumption of flue gas released in a dry distillation furnace itself and reducing the production cost of semi coke.

Description

technical field [0001] The invention relates to equipment and method for preparing granular nitrogen-free hot gas dry distillation and cooling semi-coke by using crushed bituminous coal and straw, belonging to the fields of clean coal, energy saving and environmental protection, and is a method for preparing granular nitrogen-free hot gas dry distillation method from crushed bituminous coal straw. Background technique [0002] The blue charcoal furnace is mainly divided into two types: external heating type and internal heating type. The output of external heating is low, and the intermittent working mode leads to high energy consumption. The internal heat type uses gas and air to generate hot air dry distillation. The nitrogen content in the hot air is high and the quality of the semi-coke released gas is reduced. , Sewage treatment also requires cost, resulting in high cost of semi-coke production. [0003] In order to make the crushed bituminous coal combustion meet the...

AI Technical Summary

Problems solved by technology

The internal heat type uses gas and air to generate hot air dry distillation. The nitrogen content in the hot air is high and the quality of the semi-coke released gas is reduced. , Sewage treatment also requires cost, resulting in high cost of semi-coke production

[0003] In order to make the crushed bituminous coal combustion meet the requirements of environmental protection, make various briquettes added with anthracite, lignite, binder or dry distillation to extract tar and desulfurize it to become clean carbon. The production process and technology are under development. The inventor invented the patent: ZL201210082054.8 "A Roller Extruder for Preparing Cylindrical Particulate Fuel", ZL201210082056.7 "A Method and Equipment for Preparing Gas", ZL201210082057.1 "A Cylindrical Particulate Fuel and Its Preparation Method and Equipment", ZL201010572913.2 "A reaction device for producing nitrogen-free coal gas from coal, wood branches, plant stems and oxygen", ZL201210215367.6 "A method and equipment for preparing gas from lignite", ZL201210082055.2 "A method for preparing gas Steam Turbine Combined Cycle Gas Equipment for Power Generation", ZL201210215366.1 "A Method and Equipment for Gas Production from Straw", the above-mentioned multiple invention patent technology equipment is rolled, blended, and extruded into cylindrical particles instead of blocks Putting coal into the gasifier not only produces gas, but also recovers tar, sulfur, benzene, phenol, etc., and has achieved excellent economic, social, environmental protection, and energy-saving benefits. The disadvantages are that the storage, transportation, and waterproof effects of making cylindrical particles are not good. Purification of tar in gasifiers is costly and complex, limiting its use

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