881 results about "Demister" patented technology

The invention discloses a desulphurization device and a desulphurization method for promoting removal of PM2.5 in clean flue gas after wet desulphurization. The desulphurization device comprises a flue gas desulphurization washing device and a fog drop collecting device which are connected in series, wherein the flue gas desulphurization washing device comprises a desulphurization liquid oxidation region, a desulphurization washing region and a water vapor phase change region which are arranged in sequence from bottom to top; the fog drop collecting device forms an integral or split structure together with the flue gas desulphurization washing device and is arranged on the flue gas desulphurization washing device or at an outlet. According to the method, flue gas enters the water vapor phase change region after SO2 is removed through the desulphurization washing region; wet air is filled through a wet air distributor, so that the clean flue gas after the wet desulphurization reaches an oversaturated state; oversaturated water vapor is nucleated and condensed on the PM2.5 surface, so that the PM2.5 is turned into dust fog drops with liquid films on the surfaces and the particle sizes are increased; the condensed expanded dust fog drops enter the fog drop collecting device and are collected through fog drop washing liquid and a defroster of the fog drop collecting device. According to the desulphurization device, the energy consumption for building an oversaturated water vapor environment can be effectively reduced and the PM2.5 emission problem of a wet flue gas desulphurization system is solved.

The invention discloses process technology suitable for removing a sulfur dioxide byproduct, namely, ammonium sulfate chemical fertilizer in flue gas produced by a sintering machine of a steel mill and suitable for the characteristics of large sintering flue gas amount, large flue temperature fluctuation, high moisture content, high dust content and the like. The process comprises the following steps of: allowing sintering flue gas to enter from the middle of an absorption tower, wherein the flue gas is reversely contacted with absorption liquid; removing sulfur dioxide from the flue gas in a contacting process; exhausting the flue gas through a chimney on the top of the tower after the flue gas flows through a demister on the top of the tower; introducing compressed air and ammonia water into the absorption liquid, wherein ammonium sulfate in solution is saturated and 5 percent of crystal is separated out along with continuous absorbing and oxidizing processes; and rotating, filtering and drying ammonium sulfate crystal-containing suspension to obtain a finished product. Since the absorption, oxidation and condensation of the sintering flue gas are completed in the absorption tower at the same time, the process has the characteristics of refined flow, high desulfurization efficiency and high byproduct quality.

The invention relates to an ammonia process flue gas treatment method for acidic tail gas. The method includes the steps of: 1) controlling the sulfur dioxide concentration of tail gas entering an absorption tower at a level of less than or equal to 30000mg / Nm<3>; 2) arranging process water in an absorption tower entrance flue or in the absorption tower or cooperating with a ammonium sulphate solution to perform spray cooling; 3) disposing an oxidation section in the absorption tower, setting an oxidation distributor at the oxidation section to achieve oxidation of a desulfurized absorption liquid; 4) arranging an absorption section in the absorption tower, utilizing an absorption liquid distributor in the absorption section to realize desulfurization spray absorption by an ammonia-containing absorption liquid, which is fed through an ammonia storage groove; 5) arranging a water washing layer at an absorption section upper part in the absorption tower, washing the absorption liquid in the tail gas by the water washing layer and reducing the absorption liquid escape; and 6) setting a demister at the upper part of the water washing layer in the absorption tower to control the mist drop content in the purified tail gas. Employment of the Claus sulfur recovery and ammonia process desulfurization integrated desulfurization technology in the coal chemical industry can reduce the investment cost of after-treatment, the process can be simpler, and factory environmental protection treatment can form an intensive advantage.

A separator placed in a mist collection system prior to a final air cleaning stage, and is configured to remove a substantial portion of the mist from the air. The separator includes stationary vanes in a cylindrical housing to establish a cyclonic flow therethrough, an annular flow restriction collar to establish a liquid collection area at the downstream end of the housing, a drain for discharge of the liquid from the collection area, and a flow interrupter to direct the swirling liquid into the drain.