External combustion internally heated coal carbonization furnace

Abstract

The invention relates to an external combustion internally heated coal carbonization furnace which comprises a drying section, a carbonization section, a cooling section and a cold smoke pipe which are arranged sequentially from top to bottom, wherein the drying section is used for drying the raw material coal and simultaneously obtaining cold smoke in the drying process; the carbonization section is used for carbonizing the raw material coal after the drying process and forming a carbonization product after the raw material coal is carbonized; the cooling section is used for cooling the carbonization product produced in the carbonization section by introducing the cold smoke; and the cold smoke pipe is used for conducting the cold smoke generated by the drying section to the cooling section. The external combustion internally heated coal carbonization furnace of the invention fully utilizes the cold smoke generated in the technical process to cool the carbonization product, thereby improving the overall carbonization efficiency; and a large amount of sulfur in the smoke is removed simultaneously when the carbonization product is cooled, thereby realizing the purposes of energy saving and environment protection.

Description

technical field [0001] The invention relates to a coal dry distillation furnace, in particular to an external combustion and internal heat type coal dry distillation furnace. Background technique [0002] Dry distillation is a reaction process in which solid or organic matter is heated and decomposed in the absence of air. As a result of dry distillation, various gases, vapors and solid residues are produced. The mixture of gas and vapor is separated into gas and liquid after cooling. Dry distillation is a production process that humans have been familiar with and adopted for a long time, such as dry distillation of wood to make charcoal, and at the same time to obtain wood essence (methanol), wood acetic acid, etc. Dry distillation has always been an important method in the chemical processing of coal. After the coal is dry-distilled, the composition and aggregation state of the raw materials will change, and there are solid, gaseous and liquid substances in the product,...

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Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention lies in the low efficiency of the existing coal carbonization furnace and the poor technical problem of the thermal energy utilization of the flue gas after passing through the cooling section. An external-combustion and internal-heating coal pyrolysis furnace that improves the efficiency of coal pyrolysis by preheating undried coal seams

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