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Treatment method for sludge precipitation of ammonia desulfurization solution in iron and steel industry

A technology of ammonia desulfurization and sludge precipitation, which is used in sludge treatment, water/sludge/sewage treatment, separation methods, etc.

Active Publication Date: 2022-08-02
LIUZHOU IRON & STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to effectively deal with the sludge precipitation of ammonia desulfurization solution to make the desulfurization system run in an orderly manner

Method used

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  • Treatment method for sludge precipitation of ammonia desulfurization solution in iron and steel industry
  • Treatment method for sludge precipitation of ammonia desulfurization solution in iron and steel industry

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Embodiment 1

[0052] The invention provides a treatment method for sludge precipitation of ammonia desulfurization solution in iron and steel industry, such as figure 2 When the specific gravity of the ammonium sulfate solution in the concentration section 1 of the desulfurization tower reaches the specified value, turn on the discharge pump 2, and send the ammonium sulfate solution in the concentration section 2 of the desulfurization tower to the precipitation tank 3. Precipitate to the bottom of the precipitation tank 3, and then send the ammonium sulfate clear liquid in the upper layer of the precipitation tank 3 to the ammonium sulfate preparation system through the clear liquid delivery pump 4 (the first electric valve 41 is opened at this time, and the second electric valve 42 is closed) 5 Production of ammonium sulfate fertilizer. When the liquid level of the ammonium sulfate clear liquid in the sedimentation tank 3 (the liquid level signal can be obtained through the liquid level ...

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Abstract

The invention discloses a treatment method for sludge precipitation of an ammonia desulfurization solution in the iron and steel industry, which comprises the following steps: step A, when the specific gravity of an ammonium sulfate solution in a concentration section of a desulfurization tower reaches a specified value, starting a discharge pump, and conveying the ammonium sulfate solution in the concentration section of the desulfurization tower to a precipitation tank; b, when dust and impurities are precipitated to the bottom of the precipitation tank, conveying ammonium sulfate clear liquid on the upper layer in the precipitation tank to an ammonium sulfate preparation system through a clear liquid conveying pump; c, sludge at the bottom of the precipitation tank is pumped into a neutralizing tank through a precipitation pump; and step D, feeding the lime into a neutralizing tank to carry out neutralization reaction until the HP value of the sludge after the neutralization reaction reaches 9. The whole process of settling, washing, neutralizing and the like of the sludge is subjected to on-line treatment, and shutdown treatment is not needed.

Description

technical field [0001] The invention relates to the technical field of sludge precipitation treatment, in particular to a treatment method for sludge precipitation of ammonia desulfurization solution in iron and steel industry. Background technique [0002] Desulfurization and purification of sintering flue gas usually go through a dust collector and then remove sulfur dioxide and remaining dust through a desulfurization system. Since the by-product of ammonia desulfurization is ammonium sulfate fertilizer with high added value, ammonia desulfurization has been used in sintering plants in the steel industry in recent years. More and more promotion and application. However, the dust impurities in the flue gas have a great influence on the operation of the ammonia desulfurization system and the preparation of by-products. Although the dust concentration of sintering flue gas can be controlled at 30mg / Nm after passing through the dust collector 3 However, the water in the amm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D21/02B01D21/24B01D53/50B01D53/78C02F11/00
CPCB01D21/02B01D21/245C02F11/00B01D53/502B01D53/78
Inventor 黎柳升甘牧原杨鹏陶诚陈阳黄伟益蒋杰黄漫漫熊军覃国昆周贤波廖沙海梁森韦晋科吴文升陈贵孟陈瑞强覃毅强
Owner LIUZHOU IRON & STEEL
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