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Tail gas treatment and reutilization for calcium carbide stove

A technology of calcium carbide furnace tail gas and tail gas, which is applied in separation methods, chemical instruments and methods, ammonia preparation/separation, etc., to achieve low production costs, low prices, and improved dust removal effects

Inactive Publication Date: 2007-04-04
国能英力特能源化工集团股份有限公司 +1
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and economy, and provide a method for processing and reusing calcium carbide furnace tail gas. Nitrogen treatment, this method solves the source of ammonia in flue gas desulfurization, the process is simple, the cost is low, and there is no secondary pollution

Method used

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  • Tail gas treatment and reutilization for calcium carbide stove

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Embodiment Construction

[0031] 1. The pretreatment process of calcium carbide furnace tail gas, including the cooling, dust removal and purification process of calcium carbide furnace tail gas, among which

[0032] The cooling process refers to sending the tail gas of the calcium carbide furnace into the by-product steam boiler to cool down by the fan. This process can produce 1.3-1.5MPa medium-pressure steam;

[0033] The dust removal process is realized in a multi-tube dust collector;

[0034] The purification process is to use water washing cooling and alkali washing to remove sulfur, that is, the flue gas passes through the water washing tower and alkali washing tower to remove dust particles, tar, CO 2 , sulfur and other impurities, the purified tail gas CO purity is over 90%.

[0035] 2. The tail gas synthesis ammonia process adopts a multi-stage conversion process to convert CO into H 2 , shift gas to remove CO 2 and make H 2 The molecular sieve pressure swing adsorption process is adopted...

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Abstract

A re-utilizing treatment of calcium carbide furnace tail gas is carried out by preparing synthetic ammonia, desulfurizing, denitrifying and obtaining ammonia sulfate by-product. Its advantages include low cost, simple process, no secondary-environmental pollution and waste circulating utilization.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for processing and reusing tail gas of a calcium carbide furnace. Background technique [0002] The calcium carbide furnace will produce a lot of flue gas during the production process. For example, the flue gas of a closed calcium carbide furnace contains more than 80% carbon monoxide, and also contains a large amount of dust and a small amount of nitrogen and hydrogen. At present, the known calcium carbide flue gas is usually treated with dust removal first, and then directly discharged or used as fuel. [0003] Calcium carbide production is a high-energy-carrying industry. Near large-scale calcium carbide production enterprises, large-scale electric power enterprises are often required. The flue gas emitted by boilers and kilns commonly used in electric power, chemical industry, metallurgy and other industries contains a large amount of s...

Claims

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Application Information

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IPC IPC(8): C01B31/32B01D53/34F27B3/10C01B3/12C01C1/04C01B32/942
Inventor 李智钦田继生
Owner 国能英力特能源化工集团股份有限公司
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