Coking furnace capable of recycling heat energy and coking method

Abstract

The invention discloses a coking furnace capable of recycling heat energy, and the coking furnace comprises a furnace body, an exhaust gas recycling system and a raw coal gas treatment system, wherein the furnace body sequentially comprises a coal feeding segment, a rapid coal heating segment, a raw coal gas leading-out segment, a coal carbonization coking segment, a coke quenching and tempering segment, a dry coke quenching segment and a coke discharging segment from top to bottom; the exhaust gas recycling system comprises an exhaust gas leading-out unit, an exhaust gas heat exchanger, a commutator and the like; and the raw coal gas treatment system comprises a raw coal gas leading-out unit. By using the coking furnace disclosed by the invention, continuous coal carbonization coking canbe achieved and the exhaust gas after combustion is used for dry coke quenching in the furnace; pre-dried coal can be quickly heated to 300 DEG C during entering the furnace, the coal is carbonized and coked in the furnace body, and the exhaust gas generated by self-combustion is used for dry coke quenching at the furnace bottom after the exhaust gas is cooled by heat exchange with air, thus continuously producing coke; the pollution is less in the production process; the coal industrial chain is extended, the coking cost is lowered, the coking coal types are broadened, and the product quality is improved; the profit margins are expanded in a large extent; and the maintenance cost is low.

Description

technical field [0001] The present invention relates to a coking furnace and a coking method, in particular to a coking furnace and a coking method in which coal is pre-dried for coking into the furnace, rapidly heated in the furnace, continuous coal is dry-distilled and coked, and the burnt exhaust gas is used to dry coke in the furnace. . Background technique [0002] 1. Principle of coking [0003] In coking production, the basic raw material is coking coal, which is heated at high temperature in a closed coking furnace in isolation from air, releasing moisture and adsorbed gas, and then decomposing to produce gas and tar, etc., leaving coke with carbon as the main body. This process of coal pyrolysis is commonly referred to as carbonization of coal. [0004] Coal dry distillation is divided into three types: low temperature dry distillation, medium temperature dry distillation and high temperature dry distillation. The main difference between them is the final tempera...

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Problems solved by technology

[0009] 3. Traditional coking furnace

[0012] 4. The traditional coking furnace has the following defects: 1) Coke cannot be produced continuously, and the coke produced is irregular; 2) The pollution to the environment is relatively large, which does not conform to the sustainable development plan; 3) The heat energy cannot be recycled and comprehensively utilized ; 4) Dry coke quenching using exhaust gas in the furnace cannot be realized; 5) The recycling process of coking products is complicated; 6) The maintenance cost is high

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