In recent years, there have been many explosion accidents in sewage treatment plants. The main products and production capacity of the enterprise involved in the accident are 10,000 tons of glyphosate, 3,000 tons of methanasone, 100 tons of methyl disulfonone raw drug synthesis project and 9,000 tons of glyphosate intermediate diethyl methyl phosphite per year. Why the frequent explosion of sewage treatment plant accidents, this lanzhou pesticide enterprise sewage treatment workshop explosion and what will bring about the impact?
Chemical industrial park sewage treatment plant or sewage treatment workshop explosion events are frequent, sewage treatment plant or sewage treatment workshop explosion generally have three situations.
On the one hand, sewage anaerobic treatment stage will produce methane, hydrogen sulfide and other flammable gases, these flammable gases mixed with air in the reaction container has the risk of explosion. On the other hand, part of the sewage contains flammable gases or liquids, which are easy to mix with air to form explosive mixtures. Third, if the sewage treatment workshop in part of flammable gas containers, facilities in or around the fire operation, if not in accordance with the standard operation, it is also easy to cause the explosion accident. Wastewater discharged by chemical enterprises may contain a high concentration of organic waste liquid, which can easily form explosive mixtures when mixed with air under certain conditions.
It is manifested in the following aspects:
First, if the equipment system appears airtight damage or overflow due to violation of operation, flammable and explosive liquid is easy to enter the sewage, which may explode. Second, in high temperature, will lead to sewage temperature rise. High concentration of organic waste vapors mixed with air can cause explosions in confined Spaces or facilities. Third, flammable and explosive gases produced by sewage treatment plants are mixed gases. For example, some processes that produce gas mainly with hydrogen sulfide will also contain carbon monoxide and methane; Some biogas, methane based process links, will also have hydrogen sulfide. Therefore, once an explosion occurs in a sewage treatment plant, it may be more serious than a single gas explosion.