Multi-stage-absorption ammonia desulphurization system

Multi-stage-absorption ammonia desulphurization system

  • CN 203,355,586 U
  • Filed: 06/03/2013
  • Issued: 12/25/2013
  • Est. Priority Date: 06/03/2013
  • Status: Active Grant
First Claim
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1. a multisection type absorbs ammonia method desulfurizing system, comprises absorption tower, and it is characterized in that:

  • described absorption tower is divided into oxidation panel, enriching section, absorber portion and cleaning section from bottom to top;

    Described enriching section, absorber portion and cleaning section are separated by tower tray, and described tower tray is half-duplex channel, and flue gas can be upward through from bottom described tower tray, and after described enriching section, described absorber portion and described cleaning section, the tower top from described absorption tower is discharged in turn;

    Described oxidation panel is the recycle slurry liquid pool that is positioned at the bottom on described absorption tower, and described slurries are the ammonium sulfite slurries;

    Lay the stair oxidation air hose in described slurry pool;

    By described stair oxidation air hose, oxidation air being blasted to described recycle slurry liquid pool, is ammonium sulfate by described ammonium sulfite forced oxidation;

    Have gas approach on the absorbing tower wall of described enriching section;

    The enriching section spray system is set in described enriching section;

    The ammonium sulfate slurries of described oxidation panel are made progress, by the enriching section spray system, form enriching section circulated sprinkling slurries by the suction of one-level circulating pump, with described flue gas adverse current, contact, to cooling high-temperature fume, the concentration of described enriching section circulated sprinkling slurries increases simultaneously, and the saturated ammonium sulfate slurries are transported to after-treatment system by ammonium sulfate slurries row pump;

    Be provided with the absorber portion spraying layer in described absorber portion, the external secondary spray groove of described absorber portion spraying layer;

    Be provided with the absorber portion spraying layer in described absorber portion, the external secondary spray groove of absorber portion spraying layer, be the ammonium sulfite slurries in described secondary spray groove, and lay the secondary oxidation air hose in these slurries;

    By the secondary oxidation air hose, oxidation air being blasted in the slurries in described secondary spray groove, is ammonium sulfate by the ammonium sulfite forced oxidation;

    Flue gas after described enriching section spraying cooling is upward through described tower tray and enters absorber portion, contacts the SO in flue gas with the spray droplet of the ammonium sulfate slurries of atomizer ejection reverse flow, by the absorber portion spraying layer 2dissolve, absorb SO 2after spray liquid collect and be back to the secondary circulating slot through the liquid trap of described absorber portion bottom;

    Be provided with the cleaning section spraying layer in described cleaning section, the external spray water seal of described cleaning section spraying layer circulating slot;

    Flue gas after the purification of described absorber portion upwards enters described cleaning section through tower tray again, with reverse flow, by the spray droplet of the fresh water (FW) of the atomizer of cleaning section spraying layer ejection, contacted, ammonia to the ammonium sulfate drop that carries in flue gas and some escapes is washed, to remove drop and the ammonia in flue gas, spray liquid is collected and is back to the water seal circulating slot through the liquid trap of described cleaning section bottom.

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