Acetylene production system with high utilization rate and production method

Abstract

According to the acetylene production system with the high utilization rate, the bottom of a reaction kettle communicates with a waste liquid pipe, the top of the reaction kettle communicates with the interior of a filter box through a first gas conveying pipe, the top of the filter box communicates with the interior of a drying box through a second gas conveying pipe, and the top of the drying box communicates with a gas outlet pipe; the acetylene production method comprises the following steps: injecting an acidic aqueous solution into a filter box, injecting concentrated sulfuric acid into a drying box, injecting a mixed solution between the cavity walls of a reaction kettle, grinding calcium carbide blocks into powder, introducing calcium carbide powder into the reaction kettle by using nitrogen, and uniformly stirring; powdery calcium carbide in the reaction kettle reacts with a mixed solution to generate acetylene-containing mixed gas, the acetylene-containing mixed gas is conveyed into the filter box through the first gas conveying pipe for reaction neutralization and then conveyed into the drying box through the second gas conveying pipe for neutralization drying, and finally the mixed gas only containing nitrogen and acetylene gas is discharged through the gas outlet pipe. And finally, separating the nitrogen from the acetylene gas to obtain pure acetylene gas.

Description

technical field [0001] The invention relates to the technical field of acetylene production, in particular to a high utilization rate acetylene production system and production method. Background technique [0002] Acetylene, molecular formula C2H2, commonly known as wind coal or calcium carbide gas, is the smallest member of alkyne compounds and is mainly used for industrial purposes, especially for welding metals. Acetylene is a colorless, highly flammable gas at room temperature. Industrial acetylene has a smell of garlic because it contains impurities such as hydrogen sulfide and phosphine; acetylene has the danger of violent explosion in liquid and solid state or in gaseous state and certain pressure, and it can be affected by factors such as heat, vibration and electric spark cause an explosion. [0003] In the existing technology, the industrial production methods of acetylene mainly include two kinds of calcium carbide method and hydrocarbon cracking method, wherei...

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Problems solved by technology

[0003] In the existing technology, the industrial production methods of acetylene mainly include two kinds of calcium carbide method and hydrocarbon cracking method, wherein the former is more commonly used, and the calcium carbide method is divided into dry method and wet method. Spray on the surface of calcium carbide, use the heat of reaction to evaporate water, and the reaction is violent and difficult to control; wet method refers to adding calcium carbide to water, and the generated milk of lime is easy to cover the surface of calcium carbide, or most of the milk of lime is suspended in the reaction system, reducing calcium carbide. The contact area with water affects the normal progress of the reaction, resulting in incomplete calcium carbide reaction and affecting the gas production; the generated acetylene gas is mixed with acid gases such as hydrogen sulfide, phosphine and arsine, alkaline gases such as ammonia, and relatively In addition, using the existing calcium carbide method to produce acetylene, the first-generation gas produced requires a variety of equipment for subsequent purification and purification, and the purification equipment occupies a large area and has a complex structure; Due to its large size, it cannot fully contact and react with water, resulting in low production efficiency and waste of resources

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