Upgraded coal cooling and humidifying device

Abstract

The invention relates to an upgraded coal cooling and humidifying device which comprises a rotary cooler, a humidifier and a scrubbing tower, wherein an upgraded coal discharging hole of the rotary cooler is connected with an upgraded coal inlet in one side on the top of the humidifier; an upgraded coal outlet is formed in the other side at the bottom of the humidifier; a water spraying device isarranged on the top of the humidifier; an air inlet is formed in one end of the humidifier close to one side of the upgraded coal inlet; a tail gas outlet is formed in the top of the humidifier closeto the upgraded coal outlet; the tail gas outlet is connected with the tower column on the lower part of the scrubbing tower by virtue of a pipeline; at least two stages of spraying devices are arranged on the upper part of the scrubbing tower; a net gas outlet is formed in the top of the scrubbing tower; a washing water outlet is formed in the bottom of the scrubbing tower and connected with thespraying device by virtue of a washing water circulating pipeline; and a circulating pump and a washing water supply inlet are arranged on the washing water circulating pipeline. By virtue of a methodfor combining indirect cooling and humidification cooling, the temperature and moisture of the upgraded coal meet the requirements. Meanwhile, dust-containing steam produced in the humidification cooling process is effectively treated, and up-to-standard discharge is achieved.

Description

technical field [0001] The invention relates to the technical field of upgrading low-rank coal, in particular to a cooling and humidifying device for upgrading coal. Background technique [0002] After the low-rank coal is pyrolyzed and upgraded in a vertical furnace, the temperature of the product upgraded coal is about 600°C, and it needs to be cooled to about 80°C before processing, transportation and storage; in the current domestic low-rank coal pyrolysis process, for There are two commonly used methods for cooling and cooling the upgraded coal: one is to indirectly cool the upgraded coal from 600°C to about 80°C, the disadvantage is that the cost is high, and the dried material after cooling often has dust flying and gathers and spontaneously ignites , leading to a high pressure of dust removal in the subsequent section; another process is to directly add water to the bottom of the pyrolysis furnace to cool the upgraded coal to below 80°C. The disadvantage is that the ...

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Problems solved by technology

[0002] After the low-rank coal is pyrolyzed and upgraded in a vertical furnace, the temperature of the product upgraded coal is about 600°C, and it needs to be cooled to about 80°C before processing, transportation and storage; in the current domestic low-rank coal pyrolysis process, for There are two commonly used methods for cooling and cooling the upgraded coal: one is to indirectly cool the upgraded coal from 600°C to about 80°C, the disadvantage is that the cost is high, and the dried material after cooling often has dust flying and gathers and spontaneously ignites , leading to a high pressure of dust removal in the subsequent section; another process is to directly add water to the bottom of the pyrolysis furnace to cool the upgraded coal to below 80°C. The disadvantage is that the water consumption is large and a large amount of steam is generated. Untreated steam A large amount of dust is carried, which will escape in the subsequent sections, resulting in a poor production environment

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