Industrial waste gas for hydrogen sulfide preparation method**.
With the continuous development of industry, exhaust emissions have had a serious impact on the environment. In order to protect the environment and improve resource utilization, the reuse of industrial waste gas has become a hot spot in current research. Among them, hydrogen sulfide is a common industrial waste gas, which has a strong pungent odor and corrosiveness, and poses a threat to human health and equipment safety. Therefore, it is of great significance to carry out the effective preparation and development of hydrogen sulfide.
1. Hydrogen sulfide.
Hydrogen sulfide is mainly used in petroleum, chemical, coking, calcium carbide and other industries. In the production process of these industries, a large amount of hydrogen sulfide waste gas is often generated. For example, the catalytic cracking process in petroleum processing, the gas purification process in coking plants, and the acetylene production process in calcium carbide plants.
Second, the hazards of hydrogen sulfide.
Hydrogen sulfide is a toxic gas with a strong pungent odor and corrosiveness. Long-term exposure to hydrogen sulfide can cause serious harm to human health, such as chronic poisoning, neurological diseases, etc. In addition, hydrogen sulfide can cause corrosion and damage to equipment, resulting in economic losses for enterprises.
3. Preparation method of hydrogen sulfide.
1.Acid-base washing method.
Acid-base scrubbing is a commonly used method for the preparation of hydrogen sulfide. This method uses acid and alkali solutions to react with sulfur-containing compounds to generate hydrogen sulfide gas, which is then separated and purified through compression, cooling and other steps. The acid-base scrubbing method has the advantages of simple process and low equipment investment, but it also has disadvantages such as high energy consumption and more waste liquid.
2.Adsorption method.
The adsorption method is an efficient and environmentally friendly method for the preparation of hydrogen sulfide. This method uses an adsorbent to adsorb and desorb sulfur-containing compounds to obtain high-purity hydrogen sulfide gas. Commonly used adsorbents are activated carbon, molecular sieves, etc. The adsorption method has the advantages of low energy consumption, high product purity and environmental protection, but there are problems such as large equipment investment and high maintenance costs.
3.Biological law.
The biological method is an emerging method for the preparation of hydrogen sulfide. This method utilizes microorganisms to convert sulfur-containing compounds into hydrogen sulfide gas under specific conditions. The biological method has the advantages of simple process, low energy consumption and environmental protection, but it has problems such as high requirements for microbial culture conditions and unstable transformation efficiency.
Fourth, industrial waste gas reuse.
1.*Brimstone.
*Sulfur is an important way to reuse industrial waste gases. By purifying and refining the sulfur-containing waste gas, high-purity sulfur products can be obtained, which are used in agriculture, chemical and other fields. Sulfur not only reduces exhaust emissions, but also brings considerable benefits to businesses.
2.Production of sulfuric acid.
The production of sulfuric acid is another way to reuse industrial waste gases. The sulfur-containing waste gas is introduced into the sulfuric acid production unit, and the sulfuric acid is generated through oxidation reaction to realize the resource utilization of the waste gas. The production of sulfuric acid can not only reduce exhaust emissions, but also bring considerable benefits to the enterprise.
3.Production of fertilizers.
Sulfur-containing waste gas is introduced into fertilizer production equipment, and beneficial substances such as ammonia and nitrogen are generated through reduction reaction for agricultural production. The production of fertilizers not only reduces exhaust emissions, but also brings considerable benefits to the business.
V. Conclusions. The industrial waste gas of hydrogen sulfide preparation method is of great significance. By researching and improving the preparation method, the highest rate of hydrogen sulfide and the quality of the product can be improvedAt the same time, the reuse of industrial waste gas can achieve a win-win situation for the effective use of resources and corporate benefits. In the future, we should further increase the research and development of industrial waste gas reuse technology, so as to make greater contributions to protecting the environment and promoting economic development.