TH21798B - Processes and systems for flue gas treatment - Google Patents

Abstract

DC60 Flue gas is treated for SO3 formation, without the use of ammonia injection, by adding particulate matter to the flue gas and directing flue gas into the flue gas. Subsequent gas-liquid exposure to adsorptive fluids, SO2, which occurs in gas From the flue it is removed by adsorption into the adsorption fluid. The healing process may It includes the introduction of flue gas into the dust collection unit, where the dust, including the particle particles that are formed in Flue gas is captured by the dust collection unit, and / or to the heat from the flue gas. By means of the heat exchanger, in which flue gas is cooled, a system for flue gas treatment is also provided. Flue gas is treated for SO3 formation, without the use of ammonia injection, by adding particulate matter to the flue gas and introducing flue gas into the flue gas. Subsequent gas-liquid exposure to adsorptive fluids, SO2, which occurs in gas From the flue to be eliminated by adsorption into the adsorption fluid. The healing process may It includes the introduction of flue gas into the dust collection unit, where the dust, including the particle particles that are formed in Flue gas is captured by the dust collection unit, and / or to the heat from the flue gas. By means of the heat exchanger, in which flue gas is cooled, a system for flue gas treatment is also provided.

Claims (8)

1. Flue Gas Treatment Process for flue gas treatment, which includes SO2, and SO3, which includes: (A) the addition of particulate matter to the gas from the end flue of the entire preheated device. Hot weather And an electrostatic precipitator to remove SO3, from flue gas; (B) The next step of introducing flue gas into the dust collection unit, where dust, particles and The particles present in the flue gas are trapped; And (C) later stages of bringing gas from the flue into the gas-liquid contact. With the adsorption fluid, by SO2, present in flue gas, is eliminated by Absorbs into the liquid that acts as an absorbent. 2. Flue gas treatment process according to claim 1, which at least part of Combined particles It is used as a particle powder for adding to the flue gas. 3. Flue gas treatment process according to claim 1, where step (C) is performed under the limestone-gypsum process. The sorbent fluid contains limestone suspended in it as the sorbent and is used to form gypsum as a by-product. And at least part of the dust The particles captured in the (B) step are mixed with the gypsum formed by the by-product process (C) and then drained from the system. 4. Flue gas treatment process for flue gas treatment consisting of SO2 and SO3, which includes: (A) the addition of particulate matter to gas from the flue gas of the entire preheated device. Hot weather And an electrostatic precipitator to remove SO3 from flue gas; (B) The later stage of gas recovery from the flue, using a Heat exchanger Where the flue gas is cooled; And (C) later stages of bringing gas from the flue into the gas-liquid contact. With the adsorption fluid, SO2 present in flue gas is eliminated by Absorbs into the liquid that acts as an absorbent. 5. Flue gas treatment process according to claim 4, where particle powder is Dust particles In gas obtained from coal combustion 6. Flue gas treatment process according to claim 4, which also includes, the subsequent step of the procedure (B), of the introduction of flue gas into the dust collection unit where the dust particle And the particles present in the flue gas will be trapped. 7. Flue gas treatment process according to claim 6, which at least part of Dust particles collected Will be recycled as powder particles. 8. Flue gas treatment process in accordance with claim 6, where step (C) is performed using limestone-gypsum process. Where liquids with limestone suspended in them are used as Absorb to form gypsum as a by-product And at least part of the trapped dust particles will be mixed with the by-product formed gypsum in layer (C) and drained from the system.