Flue gas desulfurizing agent, preparation method and application thereof

A desulfurization agent and flue gas technology, applied in the field of flue gas desulfurization agent and its preparation, can solve the problems of harsh temperature application range, low utilization rate of desulfurization agent, poor mechanical strength, etc., and achieve wide use temperature range and better desulfurization performance , Improve the effect of mechanical strength

Active Publication Date: 2021-02-02
SHANDONG SHANDA WIT ENVIRONMENTAL ENGINEERING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems of poor mechanical strength after molding of the existing desulfurizer, harsh tem

Method used

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  • Flue gas desulfurizing agent, preparation method and application thereof
  • Flue gas desulfurizing agent, preparation method and application thereof

Examples

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preparation example Construction

[0049] In one embodiment of the present invention, a method for preparing the above-mentioned flue gas desulfurizer is provided, comprising the following steps:

[0050] (1) Calcium hydroxide is treated with surfactant, and modified calcium hydroxide is obtained after drying and pulverization;

[0051] (2) Mix modified calcium hydroxide, calcium carbonate and additives, stir to obtain mixed powder;

[0052] (3) Mix the mixed powder with the binder, stir evenly, add an appropriate amount of aqueous solution to fully knead, and obtain a kneaded solid;

[0053] (4) Extrude and shape the kneaded solid to obtain a molded product; dry the molded product to obtain a medium-low temperature high-performance desulfurizer.

[0054] In a specific implementation manner, the specific operation of step (1) is:

[0055] Weigh calcium hydroxide, add surfactant and appropriate amount of water, stir on a magnetic or mechanical stirrer, heat and steam until paste, then dry in an oven at 120°C and...

Embodiment 1

[0064] Preparation of modified calcium hydroxide:

[0065] Weigh 500g of calcium hydroxide passing through a 200-mesh sieve, add 30g of surfactant and an appropriate amount of water, stir on a magnetic or mechanical stirrer, heat and steam to a paste, then dry in an oven at 120°C and grind into powder to obtain Modified calcium hydroxide.

Embodiment 2

[0067] Preparation of desulfurizer:

[0068] Fully mix 200g of modified calcium hydroxide, 100g of calcium carbonate, 58g of sodium carbonate, and 40g of iron oxide, and stir evenly to obtain a mixed powder; after dry mixing and stirring, add 30g of bentonite, add an appropriate amount of water to the obtained dry powder, and fully Knead, then extrude, shape, and dry at 120°C for 3 hours to obtain the finished product A1 of medium and low temperature high-performance desulfurizer.

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Abstract

The invention relates to the technical field of dry flue gas desulfurizers, particularly to a flue gas desulfurizing agent, a preparation method and application thereof. The flue gas desulfurizing agent comprises the following components in percentage by mass: 25-80% of modified calcium hydroxide, 5-40% of calcium carbonate and the balance of an additive and a binder, wherein the additive is two or three of iron oxide, sodium carbonate and manganese sulfate, the binder is selected from one or more of pseudo-boehmite, bentonite and a dilute nitric acid solution, and the modified calcium hydroxide is surfactant modified calcium hydroxide. According to the invention, the problems that an existing desulfurizing agent is poor in mechanical strength, harsh in temperature application range, low in desulfurizing agent utilization rate and the like after being formed are solved, and the desulfurizing agent provided by the invention does not need to be roasted at high temperature, has high mechanical strength, also has good desulfurizing performance under medium and low temperature conditions, and can be applied to SO2 removal.

Description

technical field [0001] The invention relates to the technical field of dry-process flue gas desulfurization agent, in particular to a flue gas desulfurization agent and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] SO emissions from coal combustion 2 The air pollution caused by it has become a very serious social problem. In-depth research on the problem of coal-fired sulfur fixation is carried out to control SO 2 Pollution emissions are very important. The reactivity of the desulfurizer is an important factor affecting the desulfurization effect, so the selection of desulfurizer varieties and the improvement of the performance ...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/50
CPCB01D53/81B01D53/508B01D2251/404B01D2251/604B01D2251/606B01D2258/0283Y02A50/20
Inventor 姚广平刘畅张云贤郭军展茂源郭强邓徐帧
Owner SHANDONG SHANDA WIT ENVIRONMENTAL ENGINEERING CO LTD
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