A treatment device for sulfur and nitrogen waste gas

Abstract

The invention discloses a treatment device for sulfur and nitrogen-containing waste gas and belongs to the technical field of biological desulfuration and denitration treatment. The treatment device comprises a biological drop-filtering tower, wherein the biological drop-filtering tower consists of an upper conical barrel, a barrel body and a hydrocyclone separation device; the upper conical barrel is fixed at the top end of the barrel body; the hydrocyclone separation device is fixed at the bottom end of the barrel body; a sieve plate is horizontally arranged in the barrel body and divides the barrel body into a packing cavity and a liquid passing cavity; a sprayer is arranged at the upper part of the packing cavity; the input end of the sprayer is connected with a circulating water pump; a valve is arranged between the sprayer and the circulating water pump; an aeration device is arranged at the upper part of the liquid passing cavity and is connected with a gas inlet pipe; a static mixer is arranged on the gas inlet pipe; one end of the static mixer is connected with the circulating water pump; and a liquid phase outlet of the hydrocyclone separation device is connected with the circulating water pump. The treatment device disclosed by the invention can effectively enhance the treatment effect on the sulfur and nitrogen-containing waste gas.

Description

technical field [0001] The invention belongs to the technical field of biological desulfurization and denitrification treatment, and in particular relates to a treatment device for waste gas containing sulfur and nitrogen. Background technique [0002] With the rapid development of my country's economy, the annual growth rate of demand for oil has reached more than 5%. However, since the growth rate of my country's own oil production is only 1.8%, it can only be supplemented by imported crude oil, and a large number of oil products are used in crude oil processing. Heavy oil catalytic cracking, hydrodesulfurization, heavy oil hydrorefining and other processing technologies make most of the sulfur in crude oil finally exist in the tail gas of the refinery in the form of hydrogen sulfide and organic compounds containing mercapto groups. These sulfur-containing substances will not only corrode equipment and pipelines, but also endanger human health and safety, so it is particula...

AI Technical Summary

Problems solved by technology

[0004] The general biological trickling filter tower is easily affected by factors such as gas residence time, intake concentration, gas velocity and packing layer height, which will affect the deodorization effect

When the structure size of the trickling filter tower is determined, the residence time is short, and the gas velocity is faster, which is beneficial to reduce the resistance of the gas film and thus speed up the mass transfer rate, which is beneficial to improve the purification effect to a certain extent, but on the other hand, the gas velocity will increase Pressure loss in trickling filter tower

Increasing the height of the packing layer can improve the purification effect, but it is not economical to increase the height of the tower blindly in order to improve the effect.

Images