Abrégé

A method of using an ammonia desulphurization technology to efficiently remove acidic gas sulfide comprises the following steps: 1) preprocessing: through sulfur recovery, acid preparation and/or incineration preprocessing methods used for acidic gas, converting remaining sulfur in the acidic gas into sulfur oxides and obtaining acidic tail gas comprising the sulfur oxides, wherein the acidic gas comes from a petrochemical industry, a natural gas chemical industry, and a coal chemical industry and the like; 2) ammonia absorption of the sulfur oxides: feeding the acidic tail gas comprising the sulfur oxides into an ammonia absorption apparatus and using circulating absorption liquid to absorb the sulfur oxides; 3) ammonium sulfate post-processing: after saturated or nearly saturated absorption liquid that fully absorbs the sulfur oxides are condensed, crystallized, solid-liquid separated and dried, a solid ammonium sulfate product is obtained. The sulfur oxides (sulfur dioxide, sulfur trioxide and a hydrate thereof) in the acidic tail gas is removed, sulfuric acid, sulfur and ammonium sulfate are produced, and clean gas discharge up to standard.

Classes IPC  ?

• E21F 15/06 - Remblayage mécanique
• E21F 15/08 - Remblayage hydraulique ou pneumatique

Abrégé

A method for efficiently removing an acid gas sulfide by using a desulfurization technology in an ammonia method comprises the following steps: 1) pretreatment: converting residual sulfur in an acid gas into sulfur oxide by means of a method of performing sulfur recycling, acid preparation and/or combustion pretreatment on sulfide in the acid gas, so as to obtain an acid tail gas containing the sulfur oxide, the acid gas being from industrial tail gas from a petroleum chemical industry, a natural gas chemical industry, a coal chemical industry, a shale oil industry, a shale gas industry, a sulfuric acid industry or the like; 2) absorption of sulfur oxide by using an ammonia method: introducing the acid tail gas containing the sulfur oxide into an ammonia process absorption apparatus, and absorbing the sulfur oxide by using a cyclic absorption liquid, and adjusting an absorption liquid parameter according to an amount of the removed sulfur oxide and a concentration of the sulfur oxide, so that the processed clean gas reaches a standard and is discharged; and 3) ammonium sulfate aftertreatment: fully absorbing saturated or approximately saturated absorption liquid of the sulfur oxide, performing concentration and crystallization, and performing solid-liquid separation and drying, so as to obtain a solid ammonium sulfate product.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/50 - Oxydes de soufre

Abrégé

A method for treating acidic tail gas by using ammonia process flue gas comprises the following steps: 1) controlling a sulfur dioxide concentration of tail gas entering an absorption tower at a level of less than or equal to 30000 mg/Nm3; 2) disposing 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, and disposing an oxidation distributor at the oxidation section to implement oxidation of a desulfurized absorption liquid; 4) disposing an absorption section in the absorption tower, and using an absorption liquid distributor in the absorption section to implement desulfurization and spray absorption by means of an ammonia-contained absorption liquid, ammonia-contained absorption liquid being is fed through an ammonia storage groove; 5) disposing a water washing layer at an upper part of an absorption section in the absorption tower, washing, by the water washing layer, the absorption liquid in the tail gas 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. Because a desulfurization technology integrating the Claus sulfur recovery and ammonia process desulfurization is used in the coal chemical industry, the investment cost of the after-treatment can be reduced, the process is simpler, and environmental protection treatment of a factory forms an intensive advantage.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide