Process for carrying out desulfurization on incineration flue gas generated by printing and dyeing sludge

A technology for incinerating flue gas, printing and dyeing sludge, applied in calcium/strontium/barium sulfate, dispersed particle separation, chemical instruments and methods, etc., to achieve the effects of low price, strong applicability and high purity

Inactive Publication Date: 2014-04-02
HUAFANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the disposal of sludge produced by sewage treatment plants and some industrial enterprises is simply landfill, but the disadvantage of landfill treatment is that the land is seriously encroached, The site is not easy to solve; second, if the anti-seepage technology is not enough, it will lead to potential soil and groundwater pollution. In the long run, for the environment, it is equivalent to the sewage not being treated effectively
[0007](2) caused great pollution to the environment of the landfill;
[0008] (3) The moisture content of the sludge is too high, causing great difficulties to the landfill operation;
[0009] (4) Seriously affecting the collection and treatment system of landfill leachate;
[0010] (5) The rheology of the sludge makes the landfill easy to deform and landslide, which brings great safety hazards to the landfill
[0029] This treatment technology occupies a small area and has high treatment and utilization efficiency, but the treatment cost is relatively high. To reduce operating costs, heat sources such as nearby thermal power plants or cement plants are required. And the investment is large, and the requirements for production safety are high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Printing and dyeing sludge incineration flue gas desulfurization process, the process includes the following steps:

[0062] The lime slurry is used to absorb sulfur dioxide in the flue gas, and the flue gas reacts with the sulfur dioxide to generate calcium sulfite, which is then oxidized to calcium sulfate.

[0063] Above-mentioned technology comprises the following steps:

[0064] (1) Diffusion of sulfur dioxide in the air stream;

[0065] (2) Diffusion through the gas film;

[0066] (3) Sulfur dioxide is absorbed and changes from gaseous state to solution state, forming hydrate;

[0067] SO 2 (g) → SO 2

[0068] SO 2 + H 2 O→H + +HSO 3 -→2H + +SO 3 2-

[0069] (4) Diffusion of sulfur dioxide hydrate and ions in the liquid film;

[0070] (5) Digestion reaction

[0071] CaO+H 2 0→Ca(OH) 2

[0072] absorption reaction

[0073] Ca(OH) 2 + SO 2 → CaSO 3 + H 2 o

[0074] CaSO 3 + SO 2 + H 2 O → Ca(HSO 3 ) 2

[0075] Ca(HSO 3 ) ...

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Abstract

The invention belongs to the technical field of waste gas treatment and particularly relates to a process for carrying out desulfurization on incineration flue gas generated by printing and dyeing sludge. The process for carrying out desulfurization on the incineration flue gas generated by the printing and dyeing sludge is characterized by comprising the following steps: adsorbing sulfur dioxide in the flue gas by adopting lime slurry; performing the reaction of the flue gas and the sulfur dioxide to generate calcium sulfite; and then oxidizing the calcium sulfite into calcium sulfate. The process has the benefits of simplicity for operation, reliability for operation and convenience for management; and wastewater in the process can be recycled after being treated.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a printing and dyeing sludge incineration desulfurization process. Background technique [0002] With the development of the economy, the contradiction of environmental protection has become increasingly prominent, and an important part of implementing the strategy of sustainable development is to protect the environment, save resources and develop new energy sources. [0003] For a long time, with the development of my country's textile industry, printing and dyeing sludge, as the residual product of sewage treatment, has a moisture content of up to 80%, is perishable, has a foul smell, and contains a large amount of organic matter, rich in nutrients such as nitrogen and phosphorus, pathogenic microorganisms, Harmful substances such as parasite eggs, if not properly treated and disposed of, will cause serious secondary pollution to the environment if they...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50B01D53/96C01F11/46
Inventor 闫英山刘涛贾洪斌周建强张炳营张志勇姚永旺李天荣王绪山吕建品
Owner HUAFANG
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