Calcium carbide powder molding equipment

Abstract

The invention discloses calcium carbide powder molding equipment. The calcium carbide powder molding equipment comprises a taper hopper, wherein two extrusion dies which are driven by power equipment to rotate in opposite directions and are extruded mutually are arranged below the taper hopper; an outlet in the lower end of the taper hopper directly faces the extruded parts of the two extrusion dies; a plurality of concave dies are arranged on the outer surfaces of the two extrusion dies; the two extrusion dies are both mounted in a protection casing provided with an inner cavity filled with nitrogen. The calcium carbide powder molding equipment can be used for safely preparing calcium carbide balls or calcium carbide blocks and inhibits flying of calcium carbide powder dust, the prepared calcium carbide balls or calcium carbide blocks are put into an acetylene production kettle for recycling, the reaction rate is uniform, the amount of gas evolution is high, and the economic benefit is increased.

Description

technical field [0001] The invention relates to recovery equipment for calcium carbide powder, in particular to a calcium carbide powder forming equipment. Background technique [0002] In 2018, the production of PVC by the calcium carbide method reached 9.81 million tons in China, and the consumption of calcium carbide was 14.22 million tons. In the process of crushing calcium carbide and transporting calcium carbide fragments by belts, a large amount of calcium carbide powder will be produced, about 180,000-250,000 tons per year. Calcium carbide powder can continue to generate gas and produce usable acetylene gas, but the recovery and reuse of calcium carbide powder has the following problems. [0003] First, the calcium carbide powder is too dusty and floats in the air to react with moisture, which makes it particularly difficult for workers to work, which is difficult and inefficient. [0004] Second, the calcium carbide powder has a large contact surface area with the ...

AI Technical Summary

Problems solved by technology

[0003]First, the calcium carbide powder is too dusty and floats in the air to react with moisture, making it extremely difficult for workers to work, which is difficult and inefficient

[0004]Second, calcium carbide powder has a large contact surface area with the air, and it is too late to collect most of the calcium carbide powder and has already reacted with moisture in the air, reducing the gas generation of calcium carbide powder

[0005]Third, after the calcium carbide powder is recovered and put into the reaction tank, due to the large contact area, the reaction speed is too fast, which may easily lead to dangerous

[0007] Fourth, calcium carbide powder recycling requires explosion-proof settings

Its processing cost is high, 50 yuan / ton

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