Coal humidifying and whirling machine of compound fluidized bed and novel humidifying technology

Abstract

The invention discloses a coal humidifying and whirling machine of a compound fluidized bed. The coal humidifying and whirling machine comprises a thermal fluid conveying pipeline, a thermal fluid air chamber, a fluid distributor, a dried material conveying pipeline, a cyclone bed body, a dried material storage bin and an exhaust discharge pipeline, which are arranged inside a shell, wherein the fluid distributor is tipsily arranged above the thermal fluid air chamber; the dried material conveying pipeline is vertically arranged below the tail end of the fluid distributor; the cyclone bed body is arranged on the dried material conveying pipeline; the cyclone bed body comprises a cyclone conveying pipeline, a cyclone air chamber and a swirl nozzle; the cyclone conveying pipeline is tangent to the cyclone air chamber; the swirl nozzle is arranged on a section of shell of the corresponding fluidized bed body of the dried material conveying pipeline; the exhaust discharge pipeline is arranged above the tail end of the fluid distributor. By adopting the coal humidifying and whirling machine, the coking coal with relatively large humidity is subjected to secondary deep humidification, i.e., primary drying is carried out by the fluid distributor, and then secondary drying is carried out by the cyclone bed body. Thus, the condition that the moisture of the dried charged coal achieves the set target value can be ensured.

Description

technical field [0001] The invention mainly relates to the technical field of coking coal pretreatment in a coking plant, in particular to a composite fluidized bed coal humidity control and swirl machine and a new humidity control technology for preparing furnace coal by using the humidity control and swirl machine. Background technique [0002] At present, most of the humidity control devices for drying coking coal to prepare furnace coal use steam as the heat source, which not only requires high investment, but also has high operating costs for the device. Some coal humidity control devices use coke oven flue gas as the heat source. Because of its low heat transfer efficiency, its effect needs to be improved. Therefore, how to improve the heat transfer efficiency of the coal humidity control device using coke oven flue gas as the heat source and ensure that the moisture content of the coal after drying reaches the set target value is a problem to be solved. Contents of ...

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Problems solved by technology

[0002] At present, most of the humidity control devices for drying coking coal to prepare furnace coal use steam as the heat source, which not only requires high investment, but also has high operating costs for the device. Some coal humidity control devices use coke oven flue gas as the heat source. Because of its low heat transfer efficiency, its effect needs to be improved

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