Technology method for steam stripping deacidification and deamination of waste water

Abstract

The invention relates to a technology method for emission reducing and resource utilization of industrial waste water, in particular to a method for processing waste water containing ammonia and acid through the efficient steam stripping deamination technology and the steam stripping deacidification technology and conducting resource utilization on ammonia nitrogen and hydrogen sulfide in the waste water. The waste water with the content of ammonia nitrogen being 500-50000 mg / L and the content of hydrogen sulfide being 100-10000 mg / L can reach the national-level ammonia nitrogen discharging standard after being treated through the technologies, and the content of sulfide is reduced to be below 20 mg / L. Meanwhile, ammonia in the waste water is recycled in a high-purity ammonium sulfate mode, and hydrogen sulfide removed from the waste water can be used for preparing sulfur.

Description

technical field [0001] The invention relates to a method for reducing discharge of industrial waste water and resource utilization, in particular to a method for combined treatment of ammonia-containing and acid-containing waste water by adopting a high-efficiency energy-saving stripping deamination process and a stripping deacidification process, and reducing ammonia nitrogen and A method for resource utilization of hydrogen sulfide. Background technique [0002] In the production process of coal chemical industry and petrochemical industry, a large amount of ammonia nitrogen wastewater containing acid gas components such as hydrogen sulfide and carbon dioxide will be produced. If it is not treated, it will cause great harm to the environment. At present, the steam stripping method is mostly used in foreign countries to treat high-concentration ammonia-containing sewage, such as U.S. patents US3335071 and US3404072, while domestic single-tower stripping side-line extraction...

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Problems solved by technology

At present, the steam stripping method is mostly used in foreign countries to treat high-concentration ammonia-containing sewage, such as U.S. patents US3335071 and US3404072, while domestic single-tower stripping side-line extraction technology is used to treat sulfur-containing and ammonia-containing sewage, such as ZL97115113. The energy is high, about 140-180 kg of steam is needed to treat each ton of waste water, and the range of ammonia nitrogen treatment is narrow, and the concentration of ammonia nitrogen in the effluent does not meet the national first-level discharge standard (GB8978-1996 "Sewage Comprehensive Discharge Standard" stipulates that the first-level standard ammonia nitrogen is less than 15mg / L)

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