Coke oven gas desulfuration and deamination combined purifying method and special device thereof

A technology of coke oven gas and special device, which is applied in the direction of combustible gas purification, combustible gas purification/renovation, chemical industry, etc., can solve problems such as uneconomical, reduce alkali consumption, reduce fixed ammonium consumption, and increase alkali consumption. Effect

Inactive Publication Date: 2011-05-18
江苏中显集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

AS desulfurization method

Method used

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  • Coke oven gas desulfuration and deamination combined purifying method and special device thereof
  • Coke oven gas desulfuration and deamination combined purifying method and special device thereof

Examples

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Comparison scheme
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Embodiment 1

[0024] A coke oven gas desulfurization and deamination combined purification method, including a desulfurization method and a deamination method, coke oven gas desulfurization adopts a wet catalytic oxidation method, deamination adopts a water washing method; coke oven gas desulfurization is performed by cooling and washing naphthalene, followed by desulfurization After desulfurization, water washing and ammonia distillation are carried out; the ammonia consumed by desulfurization comes from the ammonia produced by gas and ammonia distillation. The cooling and washing of naphthalene includes two stages of oil washing and water cooling, the oil washing includes oil cooling and oil washing of naphthalene, and the water cooling is gas-water direct cooling. The operating temperature of the cooling and washing of naphthalene is controlled below 33-35°C.

Embodiment 2

[0026] Such as figure 1 As shown, it is a special device for the coke oven gas desulfurization and deammonification combined purification method of the present invention. This special device comprises oil-washing naphthalene precooling tower 1, desulfurization tower 2, water-washing ammonia tower 3 and ammonia distillation tower 4 connected successively; The ammonia tower 3 is provided with a circulating rich ammonia water cooler 6, a circulating semi-ammonia rich water cooler 7 and an ammonia stripping water cooler 8; The ammonia vapor condensing cooler 9 is provided with a concentrated ammonia water or a concentrated ammonia vapor pipeline to communicate with the desulfurization tower 2; a lean / rich ammonia water heat exchanger 10 is arranged on the connecting pipeline between the ammonia washing tower 3 and the ammonia distillation tower 4.

[0027]The oil washing naphthalene precooling tower 1 is composed of a standpipe indirect cooler and a direct cooling sprayer; the wa...

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Abstract

The invention discloses a coke oven gas desulfuration and deamination combined purifying method and a special device thereof. The method comprises a desulfuration method and a deamination method; coke oven gas desulfuration adopts a wet type catalytic oxidation method, and deamination adopts a water washing method; coke oven gas is subjected to cooling naphthalene scrubbing before being desulfurized and then desulfurized; the coke oven gas is subjected to the water washing method deamination and ammonia evaporation after being desulfurized; and ammonia consumed by desulfuration is derived from ammonia generated by gas and ammonia evaporation. The special device comprises an oil naphthalene scrubbing precooling tower, a desulfurizing tower, an ammonia water washing tower and an ammonia evaporating tower which are connected in sequence. The combined process disclosed in the invention has the characteristics of high efficiency, energy saving, lower investment and lower operating cost. The concentrated ammonia water circulating process has the function of adsorbing and removing hydrogen sulfide. The desulfuration and deamination combined process has the effect of desulfuration twice. In addition, a gas naphthalene scrubbing precooling tower adopted by the process of the invention has the functions of scrubbing naphthalene and cooling gas, and the naphthalene scrubbing adopts a wayof combining spraying absorption, liquid film absorption and cooling, thereby improving the naphthalene scrubbing and precooling effect.

Description

technical field [0001] The invention relates to a coke oven gas purification method and its special device, in particular to a coke oven gas desulfurization and deammonification combined purification method and its special device. Background technique [0002] At present, the main uses of coke oven gas include heating fuel for kilns and raw materials for chemical synthesis gas. When used as kiln fuel, H is required 2 S content shall not exceed 200mg / m 3 ; When used as a raw material for chemical synthesis gas, H is required 2 S content shall not exceed 0.1mg / m 3 ; Therefore, coke oven gas can only be used after desulfurization treatment by desulfurization process. Before the 1980s, domestically constructed coking plants did not have gas desulfurization devices. Since the early 1980s, most domestic coking plants have built desulfurization process systems at the same time when they were built or added them later. [0003] The desulfurization process of coking plant, no ma...

Claims

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Application Information

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IPC IPC(8): C10K1/00C10K1/10C10K1/04C10K1/34C10K1/18
CPCY02P20/10
Inventor 袁长胜崔平张超群
Owner 江苏中显集团有限公司
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