Oxygen-free carbon calcination kiln

Abstract

The present invention discloses an oxygen-free carbon calcination kiln, wherein the kiln body is provided with a cylindrical combustion chamber and a tubular channel, the tubular channel surrounds the periphery of the cylindrical combustion chamber, the cylindrical combustion chamber is communicated with a gas exhaust chimney port arranged on the top of the kiln body, a coal guide calcination pipe and a gas guide pipe are arranged inside the cylindrical combustion chamber, a coal feeding hopper is fixedly arranged on the upper end of the cylindrical combustion chamber, the coal guide calcination pipe is communicated with a gas guide pipe gas inlet pipe port, a gas guide pipe gas outlet pipe port is communicated with the tubular channel, the gas guide pipe gas inlet pipe port is lower than the gas guide pipe gas outlet pipe port, a spraying pipe port extending into the cylindrical combustion chamber of a combustible gas injection pipe arranged on the kiln body position below the gas guide pipe is arranged on the circumference of the cylindrical combustion chamber and is toward the circumference tangent line direction, the combustible gas injection pipe body penetrating through the tubular channel is provided with a gas inlet, the bottom end of the kiln body is fixedly provided with a guide and collection shell, the most bottom end position of the guide and collection shell is provided with a material outlet, an air-lock valve is arranged on the material outlet, and a nitrogen gas filling port is arranged on the guide and collection shell wall. According to the present invention, quality of the finished product carbon and carbon refining efficiency can be improved, and the carbon refining cost can be substantially reduced.

Description

technical field [0001] The invention relates to coal chemical equipment, which belongs to a calcination kiln for extracting carbon from raw coal, in particular to an oxygen-free carbon calcination kiln. Background technique [0002] At present, the existing carbon calcining kilns are divided into inclined kilns, rotary kilns, vertical kilns, etc. Although the overall performance of refining carbon is superior, these types of kilns have their own shortcomings: they can only be built on site and cannot be transported in a package , The extraction efficiency of carbon is low, and the manpower and material costs of refining carbon are still high, which is not conducive to its large-scale application, and eventually leads to a significantly high sales cost of carbon. For example, the technical problems faced by the existing carbon calcination kilns for ordinary carbon extraction are: (the carbon calcination kiln for refining carbon) the kiln body heats up and cools down too fast,...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing carbon calcining kilns are divided into inclined kilns, rotary kilns, vertical kilns, etc. Although the overall performance of refining carbon is superior, these types of kilns have their own shortcomings: they can only be built on site and cannot be transported in a package , the refining efficiency of carbon is low, and the manpower and material costs of refining carbon are still high, which is not conducive to its large-scale application, and eventually leads to a significantly high sales cost of carbon

For example, the technical problems faced by the existing carbon calcination kilns for ordinary carbon extraction are: (the carbon calcination kiln for refining carbon) the kiln body heats up and cools down too fast, which can directly cause the silica bricks that make up the kiln body to break and cause the kiln body to collapse; The carbon calcination kiln needs 400 tons of coal to calcine the coal from natural drying to igniting and heating up to 900°C, that is, it takes two months to reach the calcination tooling state, and the discharge speed of carbon cannot be controlled. Ordinary The raw material for the calciner kiln must be granular coal with a diameter of 2-5cm, which will affect the quality of the finished carbon from the kiln; when the carbon calciner kiln is calcining coal, part of the volatile phenol that is not forcibly sucked from the calcined coal enters the combustion through the return channel The combustion chamber is mixed with air, and the calcining tube is in a vacuum state (negative pressure state). Therefore, the time from the coal entering the coal inlet of the ordinary carbon calcining kiln until the finished carbon leaves the kiln is as long as 36 hours. During the process of refining carbon, ordinary The calcination tube of the carbon calcination kiln is also easily blocked

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