Pulverized coal coking equipment and method

Abstract

The invention discloses pulverized coal coking equipment and method. The equipment comprises a pulverized coal semi-coking pyrolyzing furnace, wherein the pyrolyzing furnace comprises a furnace charge inlet, a feeding and distributing region, a coal gas collecting region, a coal gas dust filtering zone, a pulverized coal preheating zone, a coal gas dispersing zone, a pulverized coal pyrolyzing region and a cooling coke outlet region from top to bottom respectively. The method is used for coking by using pulverized coal of which the particle size is smaller than 20 millimeters, and comprises distributing, preheating, dust filtering, pulverized coal pyrolyzing, coal gas collecting and coke discharging steps. In the method, pulverized coal of which the particle size is smaller than 20 millimeters is used for coking, pyrolysis of pulverized coal is balanced, coal gas produced by pyrolysis can be discharged successfully, and produced tar oil is clean and free from dust. In the method, ascending hot coal gas is used for preheating pulverized coal, and descending semi-coke is used for preheating cold air and coal gas, so that heat energy is fully utilized, and the aims of saving energy and reducing emission are fulfilled.

Description

technical field [0001] The invention relates to a pulverized coal coking equipment and a coking method Background technique [0002] Semi-coke, also known as semi-coke, is a combustible solid product obtained by low-temperature dry distillation of coal. Coal removes pyrolysis water, tar, part of sulfur and gas during the rapid pyrolysis process. The yield of semi-coke made from raw coal is about 50% to 70% of the mass of raw coal. [0003] Semi-burnt black porous, the main components are carbon, ash and volatile matter. Its ash content depends on the raw coal quality, and the volatile content is about 5% to 20% (by mass). Compared with coke, it has high volatile content, large porosity and low mechanical strength. Highly reactive with carbon monoxide, steam or oxygen. It is a very good smokeless fuel with high calorific value. It is mainly used as industrial or civil fuel, and also used in the production of synthesis gas and calcium carbide. . [0004] Semi-coke conta...

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Problems solved by technology

[0005] The existing coal semi-coke pyrolysis furnace, whether it is an internal heating type or an external heating type, requires the particle size of the raw coal used to be between 20mm-80mm, and the pulverized coal below 20mm, due to small gaps, poor air permeability, and flame penetration Insufficient power, or poor heat conduction, etc., used for coking will lead to uneven temperature in different parts of the same coal seam, uneven pyrolysis, resulting in over-burning of some products, under-burning of some products, and unstable quality; at the same time, pyrolysis After the gas can not be discharged smoothly

In addition, the gas entrains dust and overflows, causing tar and dust to be unable to separate, affecting the quality of tar

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