Desulfuration method and equipment with dilute sulphuric acid-ammonia process

Desulfuration method and equipment with dilute sulphuric acid-ammonia process

  • CN 101,480,563 B
  • Filed: 01/10/2008
  • Issued: 05/20/2015
  • Est. Priority Date: 01/10/2008
  • Status: Active Grant
First Claim
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1. one kind realizes the equipment of the sulfur method of dilute sulphuric acid-ammonia process, comprise pump, blower fan, control device, pipe network, also comprise device, deamination apparatus, the separator of crystalline sulfuric acid ammonium and the transfer passage between fume side and coking side that can produce dilute sulfuric acid in sweetening process;

  • It is characterized in that,The device that can produce dilute sulfuric acid in sweetening process is the device that Lurgi process produces dilute sulfuric acid;

    Deamination apparatus (6) is for absorbing the ammonia in coke-stove gas;

    Deamination apparatus (6) is connected with coke-stove gas entrance (7), coke-stove gas outlet (8) and inner cycle channel (9);

    Deamination apparatus (6) is connected with desulphurization system through conveyance conduit (12), and deamination apparatus (6) connects the separator (10) of the crystalline sulfuric acid ammonium of coking side;

    The separator of crystalline sulfuric acid ammonium comprises the separator (18) of the separator (10) of the crystalline sulfuric acid ammonium of coking side and the crystalline sulfuric acid ammonium of fume side, and the separator (18) of the crystalline sulfuric acid ammonium of fume side is connected with dilute sulfuric acid tank (5);

    The separator (10) of the crystalline sulfuric acid ammonium of coking side connects deamination apparatus (6) and with the outlet (11) of the crystalline sulfuric acid ammonium of coking side;

    Conveyance conduit between fume side with coking side comprises the transfer passage (13) being separated the ammonium sulfate saturated solution after ammonia sulfate crystal of the transfer passage (12) of dilute sulfuric acid and the separator of the crystalline sulfuric acid ammonium from coking side;

    The transfer passage (12) of dilute sulfuric acid connects dilute sulfuric acid tank (5) and coking side, and in normal conditions, what flow in the transfer passage (12) of dilute sulfuric acid is the near saturated solution of ammonium sulfate containing dilute sulfuric acid;

    The transfer passage (13) of ammonium sulfate saturated solution connects separator (18) and the coking side of the crystalline sulfuric acid ammonium of fume side, by the conveying of the transfer passage (13) of ammonium sulfate saturated solution, to realize the contact of ammonium sulfate and flue gas to be desulfurization, and load the composition of sulfuric acid;

    Also be provided with the enough sulfuric acid vessels of concentration (15) and transfer passage (27) thereof, sulfuric acid vessel (15) and passage (27) are connected on the inner cycle channel (9) of deamination apparatus, and sulfuric acid vessel (15) and passage (27) constitute the device adding sulfuric acid in the export-oriented system of system;

    Be provided with ammonia storage tank (22) and ammonification passage (23) thereof, ammonia storage tank (22) and ammonification passage (23) thereof are connected on ammonium sulfate saturated solution passage (13), and ammonia storage tank (22) and ammonification passage (23) constitute the device adding ammonia in the export-oriented system of system;

    And being provided with the outlet (20) of the separator (18) of the crystalline sulfuric acid ammonium of fume side and the crystalline sulfuric acid ammonium of fume side and the emergent of coking side adds aquaporin (17), the emergent aquaporin (17) that adds of coking side is connected with deamination apparatus (6);

    In order to prevent saturated solution at passage (13) intercrystalline blocking pipe, being provided with dilution water at separator (10) place and adding passage (14);

    The transfer passage (13) of the ammonium sulfate saturated solution of the separator of the crystalline sulfuric acid ammonium of coking side is provided with coking side switch valve (25), and the transfer passage of dilute sulfuric acid is provided with switch valve (26);

    Also be provided with coking side to meet an urgent need the switch valve (24) of the switch valve (16) of circulation canal and the emergent circulation canal of fume side, the coking side dilution water that the switch valve (16) of circulation canal connects inner cycle channel (9) and coking side of meeting an urgent need adds passage (14), the transfer passage (13) of ammonium sulfate saturated solution of switch valve (24) the connection transfer passage (12) of dilute sulfuric acid of the emergent circulation canal of fume side and the separator of the crystalline sulfuric acid ammonium of coking side.

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