Combined dry and wet process of preparing high concentration sulfuric acid with hydrogen sulfide

A hydrogen sulfide, dry-wet technology, applied in sulfur trioxide/sulfuric acid and other directions, can solve the problems of difficult storage and transportation, high toxicity, etc., and achieve the effects of perfect treatment, improved conversion rate, and effective recovery of reaction heat.

Inactive Publication Date: 2005-07-13
HUNAN BAILI ENGINEERING SCIENCE AND TECHNOLOGY CO LTD
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  • Abstract
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Problems solved by technology

Hydrogen sulfide is gaseous and highly toxic

Method used

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  • Combined dry and wet process of preparing high concentration sulfuric acid with hydrogen sulfide

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Embodiment Construction

[0032] Taking a 150kt / a hydrogen sulfide and sulfur combined acid production plant as an example, the dry and wet acid production process of the present invention will be described in detail.

[0033] Acid gas containing 30% hydrogen sulfide 5900Nm 3 / h, sent to the incinerator together with high-temperature liquid sulfur 3.622t / h mechanically atomized through the nozzle and purified air to produce SO 2 And water, other components in acid gas such as HCN, NH 3 、H 2 etc. burn in the incinerator to produce nitrogen oxides, CO 2 and moisture, in order to completely burn the acid gas, peroxygen combustion is adopted, and the combustion temperature is controlled below 1080°C.

[0034] The high-temperature reaction gas (containing sulfur dioxide, water and other components) coming out of the incinerator enters the conversion process and is converted into sulfur trioxide. In the dry-wet conversion process, the first three stages of the combined converter are wet conversion, and th...

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Abstract

The combined dry and wet process of preparing high concentration sulfuric acid with hydrogen sulfide is suitable for treating tail gas containing acid hydrogen sulfide gas. Acid hydrogen sulfide gas, sulfur and air are mixed to burn to prepare SO2 gas, SO2 gas is converted in the combined dry and wet conversion process into SO3 gas, and SO3 gas is produced into high concentration sulfuric acid fuming sulfuric acid via combined direct condensation and adsorption process. The present invention has complete reaction of hydrogen sulfide, full recovery of reaction heat, advanced technological process, simple operation, low running cost, and high safety and reliability.

Description

1. Technical field: [0001] The invention belongs to a process for producing high-concentration sulfuric acid, in particular to a process for producing high-concentration sulfuric acid by combining dry and wet methods of hydrogen sulfide. It is used for the treatment of acidic tail gas containing hydrogen sulfide produced in the synthetic ammonia industry, petrochemical industry, smelting, coal gasification and other industries. 2. Background technology: [0002] Hydrogen sulfide widely exists in natural gas and petroleum refining processes, and a large amount of hydrogen sulfide is also produced in coal gasification, coking and the production of certain chemical products. [0003] Hydrogen sulfide is the main source of sulfur. Hydrogen sulfide is gaseous and highly toxic, making it difficult to store and transport. Restricted by technological development in the past, hydrogen sulfide was generally used to prepare sulfur by the Claus method. In the 1990s, foreign countries...

Claims

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Application Information

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IPC IPC(8): C01B17/69
Inventor 刘少武达健
Owner HUNAN BAILI ENGINEERING SCIENCE AND TECHNOLOGY CO LTD
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