TH9231B - Systems and processes for removing sulfur from wet fluas - Google Patents

Abstract

Wet sulfur removal process The sulfur dioxide contained in the flue gas is absorbed in the slurry containing calcium compounds. Slurry containing absorbed sulfur dioxide is oxidized to form slurry gypsum. And the gypsum was separated and removed from the slurry. This process consists of a part of the recirculating filter surface of the suction filter into the gypsum stirrer to allow the gypsum to adhere to the filter surface. The removal of the gypsum-containing filter surface over the slurry surface, the liquid phase removal through the filter surface. Formed anhydrous gypsum layer on the filter surface. And removing the gypsum layer from Surface filters and processing machines

Claims (6)

1. Wet flue gas desulfurization device consisting of: adsorption tower composed of upper and lower parts. Adsorption tower for adsorption of available sulfur dioxide. In the fluid gas it comes in a slurry with a calcium-containing swart in the upper part of the adsorption tower. The stirring tank is located in the lower part of the adsorbent for oxidizing the slurry containing the sulfur dioxide. Absorbed in it Resulting in pestery gypsum The stirrer tank is equipped with an agitator to stir the slurry and a solid-liquid separator for separating and removing the gypsum from the internal gypsum stirrer to the agitator. The solid-liquid separator consists of a suction filter. With a filter surface which rotates in This agitator tank while in the slurry is partially gypsum and touches the slurry gypsum. Causing the gypsum to adhere to This part of the filter surface, which is located under the slury gypsum, forms a layer of gypsum. And which removes the liquid phase Out through the filter surface above the gypsum surface. Resulting in a layer of gypsum And a way for removing layers Gypsum out of the filter surface The suction filter is placed above it, close to the level of the slurry. Inside 2. The aforementioned wet sulfur removal device, as claimed in Clause 1, where the suction filter consists of a rotating tank with an surrounding surface. The roller mechanism is installed together with the rotary drum and the filter cloth inserted to circulate on the surrounding surface of the rotating drum and through the roller mechanism, and thus forming the filter surface. It is inserted so that it circulates on the surrounding surface of the rotary drum and through the roller mechanism, and thus forms a filter surface and an outlet path consisting of a roller mechanism which removes the gypsum layer by bending the filter surface. 3. The equipment for removing sulfur from such wet flue gas, the first claim for which the filter is sucked, consists of a rotary drum with a surrounding surface as the filter surface. And an exit path consisting of a scraper that The gypsum layer formed on the filter surface of the rotary drum is removed by scraping. 4. The wet flue gas removal device, as requested in Clause 1, is where the suction filter is installed on the inside of the side of the tank. And has a way to control the position Located to control the vertical position of the suction filter according to the change of the gypsum surye level. To stabilize the depth of the filter surface in the serrory gypsum 5. Wet Sulfur Removal Equipment As requested in claim 1, the solid-liquid separator is equipped with an atomizer for washing the gypsum layer formed on the filter surface of the filter. Water-suction filter Before removing the gypsum layer from the filter surface 6. Wet Sulfur Removal Equipment as requested in claim 1, where the solid-liquid separator has a compression roller to remove water from the surface formed gypsum layer. Compression of a suction filter Before removing the gypsum layer from the filter surface