Low-rank coal conveying processing and coal storage system combined use method and device

Abstract

The invention discloses a low-rank coal conveying processing and coal storage system combined use method and device, and belongs to the field of storage and transportation of low-temperature pyrolysiscoal tar in moderate and small scale low-rank coal. The method comprises the following steps that step 1, when the automobile delivery coal granularity is greater than or equal to 300 mm, the coal isdirectly unloaded onto a primary sieving device to be sieved, and raw coal with the granularity greater than or equal to 300 mm is directly subjected to coarse crushing; and when the automobile delivery coal granularity is less than 300 mm, the coal is directly unloaded into a coal unloading pit; step 2, one path of the raw coal can be conveyed into a raw coal finely sieving and finely crushing system, and the other path can be conveyed into a coal storage system; and step 3, after the raw coal is conveyed into the finely sieving and finely crushing system to be treated, oversize materials being 10 to 80 mm are regarded as qualified coal as fired to be conveyed into a vertical carbonization furnace A, and the raw coal in a storage yard coal storage system can also be conveyed into the finely sieving and finely crushing system to be treated. By combining a raw coal conveying processing system and the coal storage system, the subsequent stable and continuous material supply of the vertical carbonization furnace is ensured to the maximum degree; the coal storage system shares the raw coal conveying processing system, the process is simplified, and the investment is reduced; and meanwhile, the stability of the coal used for the vertical carbonization furnace is ensured.

Description

technical field [0001] The invention belongs to the field of coal coke storage and transportation for medium and low temperature pyrolysis of small and medium-sized low-rank coal, and in particular relates to a method and a device for combining low-rank coal transportation and processing with a coal storage system. Background technique [0002] Low-rank coal refers to coal in a low metamorphic stage, mainly including lignite, long-flame coal, weakly caking coal, and non-caking coal. my country is rich in low-rank coal resources, which account for 55% of the national coal production and more than 80% of the coal production in Shaanxi, Inner Mongolia and Xinjiang. Low-rank coal can realize its graded and qualitative transformation through medium and low temperature pyrolysis, and obtain three energy products: gas, coal tar and semi-coke. At present, the total production capacity of semi-coke in my country is about 100 million tons per year. The production of semi-coke general...

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Problems solved by technology

However, this process requires that the particle size of the incoming coal cannot exceed the maximum lump size requirement of the incoming coal. At the same time, the coal storage in the coal yard mostly adopts the stacking method of truck dumping and forklift cooperation. On the other hand, it will cause serious damage to the raw coal, and it is easy to produce a large amount of pulverized coal, which not only increases the burden on the raw coal processing system, but also reduces the qualified rate of raw coal and increases the raw coal cost of the semi-coke plant.

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