Production process of expanding single line capacity of acetylene black by mixing gas

Abstract

The invention discloses a production process of expanding single line capacity of acetylene black by mixing gas. The production process comprises the following steps: a, transforming an acetylene cracking furnace, and additionally arranging a raw material gas inlet; b, introducing first raw material acetylene gas into the acetylene cracking furnace through the raw material gas inlet, and introducing second raw material gas into the acetylene cracking furnace through a newly arranged gas inlet after acetylene gas starts to crack, wherein the second raw material gas can absorb heat generated byacetylene cracking for self decomposition and cracking; c, when the acetylene gas is constant, controlling the outlet temperature of the cracking furnace according to the furnace pressure, and adjusting the amount of a cooling medium so as to achieve the purposes of intercepting flames and cooling, terminating a carbon black reaction, diluting concentration of carbon black and preventing coking; and d, carrying out follow-up cooling, deslagging, collecting, compressing and packaging steps on the diluted acetylene black. The production process can improve the treatment amount of acetylene gas,lower the raw material cost, improve the capacity and increase the economical benefit. The production process is simple and high in operability and can be popularized and applied quickly.

Description

technical field [0001] The invention relates to the technical field of carbon black production, in particular to a production process for enlarging single-line production capacity of acetylene carbon black by mixing gas. Background technique [0002] At present, the domestic production of acetylene carbon black basically uses acetylene gas as a raw material, which is cracked at 1600°C to 1800°C in the absence of air to form carbon black. Acetylene gas is produced from calcium carbide gas, because the generation process of acetylene carbon black is an exothermic process: [0003] C 2 h 2 =2C+H 2 +226.9kJ / mol [0004] A large amount of heat is generated after the cracking of acetylene, and taking away this part of heat will lead to an increase in cost and energy consumption. In terms of cost performance, when a single acetylene gas is used as a raw material, the single-line production capacity is preferably 1000t / a. As far as we know so far, the largest single-line produ...

AI Technical Summary

Problems solved by technology

In particular, the cost of raw material acetylene gas accounts for more than 80% of the cost of acetylene carbon black. The problems of low output, high labor costs, and high operating costs of a single production line have restricted the development of acetylene carbon black plants for many years, and the production line of the mixed gas process route has not been adopted in China.

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