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How is sulfur dioxide removed from the atmosphere?

Views:4     Author:XICHENG EP LTD     Publish Time: 2021-08-13      Origin:XICHENG EP LTD

Sulfur dioxide is the most common, simplest, and irritating sulfur oxide. The atmosphere is mainly volcanic once. This gas is emitted when a volcano erupts, and sulfur dioxide is also present in many industries. Because coal and petroleum usually contain sulfur. Element, so sulfur dioxide is generated when burned. When sulfur dioxide is reduced in the body, sulfur suboxide is formed. If the sulfur is further oxidized in the presence of PM2.5, it will be very smart and intelligent to generate sulfuric acid (the main component of acid). One of the concerns about the environmental effects of using these fuels as a possible cause.


3 ways to extract sulfur dioxide from anger:

1. The liquid made of limestone powder and water is pumped into the scrubbing tower as an absorbent to fully contact the flue gas. The sulfur dioxide in the flue gas is mixed with the coarse salt in the slurry and the air blown in from the tower water reacts with calcium oxide and calcium oxide. After a certain degree, dihydrate is formed.


2. The gypsum liquid leaving the absorption tower is concentrated and extracted, the storage volume is reduced by 10%, and the conveyor is sent to the storage and storage pile. After desulfurization, the flue gas demister removes the droplets. After the utensils are heated and heated, they are discharged from Yantai atmosphere.


3. The principle of the NID method: the ash powder enters the reactor after being mixed with the lime smoke eliminator (LDH), and chemically reacts with the SO₂ in the gas to form CaSO₃ and CaSO₄, and the SO₂ in the flue gas is removed.

PP wet scrubber internal water spray system


Extended information:


Currently, desulfurization methods generally include pre-combustion and post-combustion degassing. With the development of industry and the improvement of people's living standards, the thirst for energy is also increasing. Sulfur dioxide in coal-burning smoke has become a reduction in air pollution. SO2 pollution has become a well-deserved environmental governance in the world today. A few flue gas removal processes have been widely used in industry, and they also have important practical significance for the treatment of exhaust gas from various boilers and incinerators.


The dry method F's desulfurization absorption and product treatment are in a dry state. This method has the advantages of temperature after the waste acid in the sewage pond, less corrosion of the equipment, no clear understanding of the flue gas in the purification process, high purification of the smoke, and diffusion of the chimney outlet. There are few secondary pollution, but the desulfurization efficiency is low, the reaction speed is slow, and the equipment is huge.


Semi-dry FGD technology means that the desulfurizer desulfurizes in a dry state, regenerates in a wet state (such as a water washing change regeneration process), or desulfurizes in a state, and treats the flue gas of a desulfurized product in a dry state (such as a wet drying method) Desulfurization technology.


In particular, the semi-dry method of desulfurization in the wet state and treatment of the desulfurization in the dry state has the advantages of fast surface reaction wet desulfurization and high dereaction efficiency. It also has the advantages of dry method without sewage and waste acid. With the increase in processing, it has received widespread attention. According to the purpose of the de-reaction, it can be divided into two types: the ejection method and the recovery method.

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