Heat exchange structure used for coal drying treatment

Abstract

The invention provides a heat exchange structure used for coal drying treatment, comprising a body, an air distribution pipe and an air collection umbrella, wherein the upper end of the body is suitable for the entrance of the coal blocks and the lower end thereof is suitable for the outflow of the coal blocks; the air distribution pipe is arranged in the middle of the body and is used for introducing a heat carrier; and the air collection umbrella is arranged near the upper and lower ends of the body. In the heat exchange structure of the invention, the air distribution pipe at the upper part is arranged below the air collection umbrella, namely, the flow rate of the heat carrier is opposite to that of the materials to form counter current heat exchange, thus realizing efficient heat exchange and saving energy; in the lower part, as the water content of the coal is greatly reduced and the surface temperature of the coal blocks is raised, therefore, the mode that the air distribution pipe is arranged on the upper part and the air collection umbrella is arranged in the lower part for fair current heat exchange to prevent the precipitation of volatile matters due to overhigh temperature of the coal blocks, thus protecting the volatile matters and the fixed carbon to the maximum.

Description

technical field [0001] The invention relates to a coal dry distillation device, in particular to a heat exchange structure for coal drying treatment. 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, and semi-coke, coal tar,...

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the drying treatment area of ​​the existing Lurgi furnace is easy to form local high temperature due to the thick coal seam, which is not

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