Flue gas desulfurizing system and method using flue gas desulfurizing system to desulfurize flue gas

Abstract

The invention discloses a flue gas desulfurizing system. The flue gas desulfurizing system comprises a chilling section and an absorbing section which are mutually communicated by a connecting pipe, wherein the chilling section comprises a spraying area and a liquid storage tank which are mutually communicated; the spraying area is provided with a spraying layer, the liquid storage tank is positioned under the spraying area, and the spraying layer and the bottom part of the liquid storage tank are connected by a pipeline and a chilling circulation pump to form a chilling loop; a pipeline for connecting the chilling circulation pump and the liquid storage tank is provided with an alkaline liquid inlet, and the alkaline liquid inlet is connected with an alkaline liquid storage tank through aswitch valve. The invention also provides a method using flue gas desulfurizing system to desulfurize flue gas. The flue gas desulfurizing system has the advantages that the high-temperature tail gaswith higher concentration of SO2 (silicon dioxide) can be treated, the investment is low, the energy consumption is low, and the clean and environment-friendly effects are realized. A method has theadvantages that the operation is simple, the absorbing ability is strong, and the scaling and blockage of equipment can be avoided; the higher desulfurizing rate can be obtained with fewer circulationliquid, the exhausted flue gas is clean, any inorganic particulate matter is basically not contained, the trailing white smoke is avoided, and the haze weather is not formed.

Description

technical field [0001] The invention relates to sulfur-containing flue gas treatment, in particular to a flue gas desulfurization system and a method for using the flue gas desulfurization system to carry out flue gas desulfurization. Background technique [0002] With the massive development of sour crude oil and natural gas resources in the world, and the continuous development of coal chemical industry, sulfur recovery has become an indispensable supporting environmental protection device; my country has always advocated energy conservation and emission reduction work, and sulfur dioxide pollutes the environment seriously, and smog is also It is getting more and more serious. With the stricter and higher emission standards, we are required to continuously improve the sulfur recovery process, especially the advanced tail gas treatment technology to reduce SO 2 emission and protect our environment. The "Petroleum Refining Industry Pollutant Discharge Standard" (GB 31570-201...

AI Technical Summary

Problems solved by technology

Since the improved CLAUS sulfur recovery technology realized industrial production in the 1930s, after nearly 90 years of development and improvement, it has become mature and perfect. The emission concentration of sulfur dioxide in the air is usually 300-800mg / Nm 3 , cannot meet the current standard requirements

[0003] At present, the commonly used transformation technologies for tail gas treatment of sulfur recovery units are: replacing high-efficiency Claus catalysts, adding bubblers in liquid sulfur tanks, replacing solvents in solvent regeneration systems, and adding alkali washing tower facilities before incineration. After these technological transformations, the smoke The emission concentration of sulfur dioxide in the air basically reaches 100mg / Nm 3 Below, but in abnormal circumstances such as the start-up period of the device, start-up pre-vulcanization, stoppage of sulfur blowing, by-pass conditions, and short-term large fluctuations in raw materials during normal production, there are still problems of excessive emissions

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