Method for processing microscale dust in tail gas of calcium carbide furnace

Abstract

The invention relates to a method for processing microscale dust in tail gas of a calcium carbide furnace. A depth dusting system in the tail gas of the calcium carbide furnace purification process comprises a compressor, a buffer tank, a wet type dust collector, a gas-liquid separator and a filter, which are connected with one another sequentially; after being subjected to pressure increase by the compress, the tail gas including dust passes the buffer tank, then enters the wet type dust collector for dusting, and comes out the wet type dust collector to be a tail gas gas-liquid mixture of the calcium carbide furnace; the tail gas gas-liquid mixture is subjected to separation of droplets in dust by the gas-liquid separator, and then passes the filter to remove fine droplets which are not separated, in the dust by filteration; and then the tail gas subjected to dust removal is output from the depth dusting system. The method solves the problems that pipeline and equipment have high probability of blocking which is caused by that a lot of dust with small particle graininess and viscosity is in tail gas of the calcium carbide furnace, the temperature is difficult to control, and potential safety hazard can not be avoided, has the advantages of less equipment, practicable process technology, safety and stability, can achieve the purpose of dusting of the tail gas of the calcium carbide furnace, energy conservation, emission reduction and environmental protection, and can be widely used in the tail gas dusting processing technology.

Description

technical field [0001] The invention relates to the technical field of tail gas dedusting, and is particularly suitable for the treatment method of micro dust in calcium carbide furnace gas. Background technique [0002] Calcium carbide is an industry with high energy consumption and high emissions. In calcium carbide production, calcium carbide furnace gas is the biggest source of pollution. Data show that there are currently nearly 400 calcium carbide production enterprises in the country, with a total annual output of more than 15 million tons. Calcium carbide furnaces emit about 8 million tons of waste gas (carbon dioxide) and 600,000 tons of dust every year, causing great pollution to the environment; especially the main component of calcium carbide furnace gas is carbon monoxide (75%~90%), all of which are white "sky lanterns" , which is equivalent to wasting 2.4 million tons of standard coal each year and emitting about 12 million tons of CO 2 . [0003] Due to t...

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Problems solved by technology

[0005] The present invention solves the problems in the current comprehensive utilization process of calcium carbide furnace tail gas, because the calcium carbide furnace tail gas contains a large amount of dust with small particle size and high viscosity, which is easy to block pipes and equipment, the temperature is not easy to control, and there are potential safety hazards, etc., and further provides a A treatment method for trace dust in calcium carbide furnace tail gas with high dust removal efficiency, low pollution, feasible process technology, safety and stability

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