Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite additive for flue gas desulfurization according to limestone method

A composite additive, limestone technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of unqualified desulfurization drainage chromaticity, reduced desulfurization efficiency, slow reaction process, etc., to ensure efficient and stable operation, The effect of improving desulfurization efficiency and improving oxidation efficiency

Active Publication Date: 2013-05-01
天津海得润滋食品有限公司
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are three disadvantages: firstly, the price is high; secondly, it is difficult to dissolve in water at room temperature, so the reaction process is slow, and the energy consumption is high during the reaction; finally, the pH value buffer zone of a single species of adipic acid is narrow, which is not suitable for The use of desulfurization towers with lower pH values;
However, nylon acid has a darker color, resulting in unqualified chromaticity of desulfurization drainage, so it is difficult to widely promote
[0006] At the same time, if the oxidizing air volume cannot meet the operation requirements during the desulfurization of limestone flue gas, it is very easy to cause poisoning of sulfite in the limestone slurry, resulting in fouling of the system and difficulty in dehydration of gypsum, reducing desulfurization efficiency and causing certain dangers
Moreover, when using limestone flue gas desulfurization, it is necessary to add defoamer to the inside of the desulfurization tower to ensure efficient and stable operation of the desulfurization tower, which is very cumbersome
[0007] The invention provides a limestone method flue gas desulfurization additive whose main component is nylon acid extraction residue, which effectively solves the problem that the color of the drainage after using the nylon acid additive for flue gas desulfurization is darker, resulting in unqualified chromaticity of the desulfurization drainage Disadvantages: It has a wider pH buffer area, which is suitable for desulfurization towers with lower pH areas. At the same time, it greatly saves costs, improves desulfurization efficiency, and has the ability to improve the oxidation efficiency of calcium sulfite and solve the problem of limestone slurry poisoning. , Eliminate foam in the desulfurization tower, and ensure the efficient and stable operation of the desulfurization tower
At present, no similar products have been found in the market, and no relevant technical information has been found to be published.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite additive for flue gas desulfurization according to limestone method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with embodiment.

[0018] Embodiment Carry out the production of nylon acid extraction residue first. The specific steps are:

[0019] (1) Take 200kg of nylon acid, put it in a stirring tank, and add 800kg of nylon acid desalted water into the stirring tank;

[0020] (2) Start the stirrer, heat slowly, control the heating speed at 3-5°C / min, and keep the temperature constant for 1 hour after heating to 50°C;

[0021] (3) Pass cooling water into the mixing tank, slowly cool down, the cooling rate is 2-3°C / min, and keep the temperature for 2 hours after the temperature drops to 15°C.

[0022] (4) After constant temperature for 2 hours, vacuum filtration is used to remove the filtrate. The remaining crystals in the stirring tank are the residues of nylon acid extraction.

[0023] Then take 88kg of nylon acid extraction residue, 2kg of salicylic acid, 2kg of humic acid, 3kg of manganese chloride and 5k...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A composite additive for flue gas desulfurization according to a limestone method is composed of the following materials by mass: 85 to 90 percent of nylon acid extracted residue, 1 to 3 percent of salicylic acid, 1 to 3 percent of humic acid, 1 to 5 percent of manganese chloride, and 1 to 5 percent of dimethyl silicone antifoaming agent which are mixed with each other, wherein nylon acid extracted residue is the residue of nylon acid extracted with a large part of glutaric acid. The composite additive has the beneficial effects that the defects of deeper color and unqualified desulfuration drainage chromaticity caused when a nylon acid-type additive is used for flue gas desulfurization are overcome; the pH value buffer zone is wider; sulfur dioxide gas can be dissolved in limestone paste faster; the dissolution of limestone calcium carbonate can be accelerated; the desulfuration efficiency is improved; the cost is greatly reduced; the oxidation efficiency of calcium sulfite is improved; the poisoning problem of limestone paste liquid is solved; foam of a desulfurization tower is eliminated; and the efficient steady operation of the desulfurization tower can be guaranteed.

Description

(1) Technical field [0001] The invention relates to the field of limestone flue gas desulfurization, in particular to a composite additive for limestone flue gas desulfurization. (2) Background technology [0002] At present, limestone flue gas desulfurization is the desulfurization process with the most mature technology and the most engineering application achievements in the world. It is suitable for flue gas desulfurization of any sulfur-containing coal. At present, there are roughly three types of additives used to improve the efficiency of limestone flue gas desulfurization in the market, namely, desulfurization additives mainly composed of benzoic acid or sodium benzoate, desulfurization additives mainly composed of adipic acid and nylon acid. desulfurization synergist. However, each of these three additives has its disadvantages, such as: [0003] Benzoic acid or sodium benzoate type desulfurization additive: the effect of improving desulfurization efficiency is lo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D53/80B01D53/50
Inventor 王松李永利巩墨峰张革刘金英刘永智刘兵王刚
Owner 天津海得润滋食品有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products