Method and device for passivating, cooling, destructively distilling and pyrolyzing anthracite coal

Abstract

The invention provides a method and a device for passivating, cooling, destructively distilling and pyrolyzing anthracite coal. According to the method provided by the invention, medium-temperature passivated anthracite coal is initiatively subjected to temperature-raising passivation and the content of combustible gas and volatile matters in micro-pores of the anthracite coal can be reduced to the greatest extent; spontaneous combustion of the anthracite coal is avoided and the anthracite coal can be stored for a long period; moreover, the moisture content of the anthracite coal prepared by the method is maintained in a range of 4 weight percent to 5.5 weight percent and is less than 6 weight percent to 12 weight percent in the prior art, so that weathering, cracking and spontaneous combustion of the anthracite coal are avoided; an effective heating mount of the anthracite coal is kept and the transportation amount of the anthracite coal is alleviated; meanwhile, the temperature of the passivated and cooled anthracite coal can be kept in a range of 25 DEG C to 45 DEG C after the method provided by the invention is used, so that the extreme temperature 60 DEG C of a coal pile of the anthracite coal is avoided and the spontaneous combustion of the anthracite coal can be further avoided.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method and a device for passivating, cooling, carbonizing and pyrolyzing anthracite. technical background [0002] Anthracite, commonly known as white coal or red coal, is the coal with the largest degree of coalification. Anthracite has high fixed carbon content, low yield of volatile components, high density, high hardness, high ignition point, no smoke when burned, and a calorific value of about 6000-6500 kcal / kg. The main problems currently existing in the rotary reactor test equipment and industrial equipment used in the production of anthracite by dry distillation pyrolysis technology are: On the one hand, during the cooling process of anthracite, due to the poor sealing effect of the inlet and outlet of the rotary reactor, excessive Oxygen enters the rotary kiln and oxidizes the material, resulting in anthracite with high oxygen content and lo...

AI Technical Summary

Problems solved by technology

The main problems currently existing in the rotary reactor test equipment and industrial equipment used in the production of anthracite by dry distillation pyrolysis technology are: On the one hand, during the cooling process of anthracite, due to the poor sealing effect of the inlet and outlet of the rotary reactor, excessive Oxygen enters the rotary kiln and oxidizes the material, resulting in anthracite with high oxygen content and low water content, which is easy to spontaneously ignite; In the middle, the dry distillation pyrolysis anthracite will inevitably spontaneously ignite, which makes the dry distillation pyrolysis anthracite inconvenient for long-term storage and long-distance transportation.

[0004] However, the content of adsorbed combustible gas and highly active volatile matter in the anthracite after passivation and cooling by the above-mentioned technology is still relatively high, which makes it inevitable that there is still a natural possibility in the storage process of anthracite; in addition, the above-mentioned method has passed The water content and temperature of anthracite after cooling and hydration reaction are also relatively high (the water content is 6-12%, and the temperature is 40-60°C). As we all know, the water content of standard anthracite is generally controlled at 4-6%. If the water content of the anthracite is too high, it will accelerate the weathering, cracking, and even spontaneous combustion of anthracite coal, which will seriously affect the storage of anthracite coal; second, it will also affect the combustion stability and heat conduction of anthracite coal, and reduce the effective calorific value; cost

In addition, the coal pile limit temperature of anthracite is 60°C. If this limit temperature is reached, anthracite is prone to naturalization. Therefore, the anthracite obtained by the above-mentioned technology through passivation cooling inevitably has the possibility of naturalization.

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