Closed scale-inhibiting and cooling system for wet production of acetylene from calcium carbide

Abstract

The invention provides a closed scale-inhibiting and cooling system for wet production of acetylene from calcium carbide in order to solve a problem that heat release is obstructed by scales formed byCaCO3 generated from Ca(OH)2 and CO2 in a spray cooling tower. The system comprises an acetylene generator, a concentration tank, an electromagnetic cleaner, a bellows heat exchanger, a sedimentationtank, an air cooling tower and pumps. The system is characterized in that a bellows is arranged in the bellows heat exchanger; a pipeline among the concentration tank, the electromagnetic cleaner, the bellows heat exchanger and the sedimentation tank is not in contact with air, and forms a closed system, so the generation amount of CaCO3 is reduced; the heat of the system is indirectly released to the outside of the system by a loop formed by the bellows heat exchanger and the air cooling tower; and the arranged electromagnetic cleaner can increase the solubility of scale forming materials inwater in order to achieve the purpose of scale inhibition. The system makes the production of a technology for wet production of acetylene from calcium carbide stable, and reduces the operating costof enterprises.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a closed scale-inhibiting cooling system for preparing acetylene by a calcium carbide wet method. Background technique [0002] Acetylene, formula C 2 h 2 , is a kind of alkyne compound. The production of acetylene by the calcium carbide method is a major production process, which is mainly wet-processed, with a small amount of dry-processed process. In view of the fact that the process of producing acetylene by the calcium carbide method is an exothermic reaction, a large amount of reaction heat in the reaction process makes the temperature of the liquid continuously rise. In the wet production process, in order to maintain a constant temperature in the acetylene generator, the amount of water injected is much higher than the amount of water used in the reaction. From the perspective of water saving, the excess water after the reaction is generally co...

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Problems solved by technology

[0004] The invention provides an anti-scaling cooling system for calcium carbide wet-process acetylene production. The system adopts a closed circulation of circulating fluid and an indirect cooling scheme, which can overcome the easy fouling of the spray tower cooling equipment existing in the existing wet-process acetylene production process. Disadvantages that the heat exchange effect cannot be guaranteed

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