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Sulfur recovery device for oxygen enrichment/air method switching in coking industry

A sulfur recovery, air method technology, applied in chemical instruments and methods, inorganic chemistry, sulfur compounds, etc., to achieve the effect of expanding processing capacity and improving stability

Pending Publication Date: 2022-03-04
BEIJING HANGHUA ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By precisely adjusting the combustion-supporting air and oxygen content, the limitations of existing devices are solved, the processing capacity of the device is expanded, and the efficiency of sulfur recovery is improved, so as to achieve the purpose of long-term stable operation of the device and emission of tail gas up to standard

Method used

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  • Sulfur recovery device for oxygen enrichment/air method switching in coking industry
  • Sulfur recovery device for oxygen enrichment/air method switching in coking industry
  • Sulfur recovery device for oxygen enrichment/air method switching in coking industry

Examples

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Effect test

Embodiment 1

[0059] Take the actual data of a 30-ton sulfur recovery unit in a coking plant in Shandong as an example:

[0060] Under the design conditions, the incoming material is the acid gas produced by the desulfurization regeneration unit, in which the molar concentration of H2S is 58.2%, and a two-stage Claus unit is used. When burning by the air method, the residence time in the main combustion furnace is 1.5s, and the temperature in the furnace is 1292°C. The conversion rate of sulfur recovery is 95.7%, and the production of sulfur meets the first-class requirements of the national standard, and the purity (quality) is as high as 99.5%.

[0061] Mode 1:

[0062] When H 2 When the molar concentration of S fluctuates between 50% and 65%, the correction coefficient K2 is 0.9 to 1.1, and the air volume of the combustion furnace is adjusted by the air method, which can satisfy the combustion temperature of the sulfur recovery reaction at 1250°C to 1350°C, and the conversion rate of s...

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Abstract

The invention relates to the field of coke oven gas recovery, and discloses an oxygen enrichment / air method switching sulfur recovery device in the coking industry, which comprises a Claus reaction system, an air distribution system and an oxygen enrichment / air control switching system, the air distribution system comprises a main air pipeline and an auxiliary air pipeline which are communicated with the high-temperature Claus reaction system; the air main pipeline is provided with a combustion-supporting air volume adjusting valve, and the combustion-supporting air volume adjusting valve is controlled to carry out feedforward adjustment according to the component change condition of the acid gas; the air auxiliary pipeline is provided with an auxiliary air volume adjusting valve, and the auxiliary air volume adjusting valve is controlled to conduct feedback adjustment according to the tail gas component change condition of the Claus reaction system. The oxygen enrichment / air control switching system comprises an oxygen pipeline communicated with the air main pipeline and an oxygen amount adjusting valve arranged on the oxygen pipeline. Acid gas with large composition and flow fluctuation can be treated, the stability of the sulfur recovery device is improved, long-period stability of the device is guaranteed, and the treatment capacity of an existing device is improved.

Description

technical field [0001] This application relates to the technical field of coke oven gas recovery, in particular to a sulfur recovery device for oxygen-enriched / air method switching in the coking industry. Background technique [0002] The coking industry is an important part of my country's traditional coal chemical industry. The main product of the coking process is coke, and the by-products include tar, sulfur, ammonium sulfate, crude benzene and coke oven gas. Coke oven gas is a combustible gas produced after high-temperature dry distillation of coal in the coking production process of coking plants. 15% to 35% of the sulfur elements are transferred to the coke oven gas, and more than 95% exist in the form of H2S. Therefore, acid gas needs to be effectively removed before coke oven gas is further utilized. According to different processes, the removal products are mostly acid gas containing hydrogen sulfide, and the concentration of hydrogen sulfide is between 30% and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/04
CPCC01B17/0404C01B17/0452Y02P20/129
Inventor 杨佳宁王鹏举霍岩刘洪臣杨志刚马博马晓蓉
Owner BEIJING HANGHUA ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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