Sulfur containing waste gas treatment method
Sulfur containing waste gas can be treated by two methods, one is to desulfurize the fuel before combustion, and the other is to desulfurize the flue gas after combustion. The concentration of sulfur dioxide in the flue gas is usually about 0.2, so its gas processing capacity is very large during the desulfurization process. Take the 100 million kilowatt thermal power plant as an example, 5097 meters of flue gas is generated every minute. However, according to foreign reports, desulfurization after combustion is still much more economical than desulfurization before combustion.
For example, before burning residual oil, the cost of catalytic hydrogenation and desulfurization is US $2.1 per ton, while the cost of flue gas desulfurization after burning is only RMB 0.66.1.65 per ton. According to incomplete statistics, there are 23 chemical treatment methods for flue gas desulfurization, but most of them are still in the research stage, and only a few of them are tried in thermal power plants and sulfuric acid plants.
Most odor substances come from chemical plants with petroleum as raw material. Sewage treatment plant. Waste treatment plant. Feed mills. Farm for animal husbandry products. Leather factories and other industrial enterprises. In particular, petroleum contains trace and various structural forms of sulfur, oxygen, nitrogen and other hydrocarbons for storage, transportation and heating. The odor generated in the synthesis process escapes into the atmosphere, causing environmental odor pollution. The Law of the People's Republic of China on the Prevention and Control of Air Pollution, revised in 1995, clearly stipulates that the units that discharge malodorous gases into the atmosphere must take control measures to prevent the surrounding residential areas from being polluted.
Odor gas is harmful to human body - uncomfortable odor belongs to foul gas. Odor is a widespread public hazard, which strongly stimulates people's psychology and can lead to poisoning in serious cases. Its toxicity to the human body is manifold: first, it will cause the human body to reflexively inhibit inhalation and hinder normal respiratory function; The nervous system has been stimulated by low concentration odor for a long time, which leads to the loss of sense of smell, and then the dysfunction of excitation and inhibition regulation of the cerebral cortex.
