Abstract
This article introduces a new and efficient process and device for acid gas recovery in refining and chemical enterprises-hydrogen sulfide dry acid production process and device. The main problems and failures in the operation of the device are explained, and the related problems and the causes of the failures are analyzed in a targeted manner. In the technical transformation of the base and lining of the acid gas incinerator and the adaptive transformation of the electric defogging system, the development and application of new all-glass steel cooling tower, the implementation of new technologies to improve the efficiency of defogging and acid separation, and the mass transfer and heat transfer efficiency of the process medium, The application of "three units" technology to improve the technical and economic level of the device, the use of sodium-alkali neutralization process to treat the wastewater and tail gas of the device, have unique insights and successful experience, and continue to carry out technical improvement, innovation, integration and application of results for the device. The safety, stability, long-term, economic operation and design and improvement of related fields have important guidance and reference significance.
Highlights
In the process of petroleum refining and processing, a large number of sulfur-containing process gases are produced
This paper introduces the application of a new and High-efficient acid gas recovery method in Refinery, i.e. hydrogen sulfide dry process acid making process
The pipes and industrial pumps used in the sulfuric acid plant are not resistant to corrosion under working conditions, resulting in shortened life cycles
Summary
In the process of petroleum refining and processing, a large number of sulfur-containing process gases are produced. The sulfuric acid plant of Sinopec Jinmen Petrochemical Company, which adopts the acid gas dry acid production process of the refinery. The device adopts three-stage reaction and one-stage reaction, two-stage conversion and two-stage absorption dry acid production process. The process flow consists of 3 processes: 1) In the incineration purification and cooling section, Incinerate hydrogen sulfide, the main component of acid gas, into sulfur dioxide, and recover the waste heat to produce 3.5MPa steam. 3) In the dry absorption process, sulfuric acid with a mass fraction of 92.5% to 93.5% is used to absorb the moisture in the process gas and sulfuric acid with a mass fraction of 98.3% to 98.5% is used to absorb sulfur trioxide to produce finished sulfuric acid. The plant will be shut down for many times due to its own reasons, and the start-up and shutdown of the device are accompanied by major safety and environmental protection risks
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