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Desulfurization and calcium removal method for fly ash water washing liquid

A fly ash and water washing technology, which is applied in the field of fly ash water treatment, can solve the problems of inconvenient raw materials and achieve the effects of improved mixing effect, good removal effect and low price

Pending Publication Date: 2022-07-22
江山市虎鼎环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Based on this, the purpose of the present invention is to provide a method for desulfurization and decalcification of fly ash washing liquid to solve the technical problem that raw materials are inconvenient to fully contact with sewage

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  • Desulfurization and calcium removal method for fly ash water washing liquid
  • Desulfurization and calcium removal method for fly ash water washing liquid
  • Desulfurization and calcium removal method for fly ash water washing liquid

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Embodiment Construction

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0038] The embodiments of the present invention will be described below based on the overall structure of the present invention.

[0039] A method for desulfurization and decalcification of fly ash washing liquid. The fly ash washing waste water after decalcification is heated to 110°C-140°C, evaporated and concentrated to a certain concentration (the control cannot exceed the concentration point where potassium chloride is precipitated), and chlorine is precipitated by crystallization. After the sodium is dissolved, it is collected by a centrifuge, and then t...

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Abstract

The invention discloses a desulfurization and calcium removal method for fly ash water washing liquid, which comprises the following steps: introducing medical waste incineration flue gas into fly ash water washing wastewater, and simultaneously adding ammonia water into the wastewater for continuous reaction to remove Ca < 2 + > in the wastewater. CO2 in the medical waste incineration flue gas reacts with CaCl2 in the fly ash washing wastewater to generate CaCO3 so as to be precipitated and removed, and NH4 < + > in the ammonia water exists in the form of NH4Cl. According to the method, the medical waste incineration flue gas can be fully utilized, the method is used for removing calcium ions in the fly ash washing wastewater and reducing the emission of CO2, chlorine salt in the treated wastewater is purified, and the method has great industrial prospects.

Description

technical field [0001] The invention relates to the field of fly ash water treatment, in particular to a desulfurization and calcium removal device for fly ash washing liquid. Background technique [0002] The waste incineration fly ash is the catch of the flue gas purification system and the bottom ash settled at the bottom of the flue and chimney during the incineration and disposal of municipal solid waste. The waste incineration fly ash contains high concentrations of heavy metals such as Pb, Hg, Zn, Cd, Cr, etc., and can also absorb the highly toxic and carcinogenic dioxins produced during the incineration process, which has a serious toxic effect on the environment. Clearly defined hazardous waste. [0003] The disposal methods used for waste incineration fly ash at home and abroad mainly include: cement solidification, lime solidification, chemical stabilization, asphalt solidification, melting solidification, cement kiln co-processing, high temperature sintering tec...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01C1/16C01D3/08
CPCC02F1/04C02F1/5236C01D3/08C01C1/164
Inventor 郑钟奕刘悦宁文晖
Owner 江山市虎鼎环保科技有限公司
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