Method for preparing manganese-base dedusting and denitration integration function filter material

A filter material and denitrification technology, which is applied in the field of air pollution control, can solve the problems of weak bonding between catalyst active components and filter material, easy pulverization and falling off, and unsuitability for industrial production. It achieves tight bonding, simple process, The effect of high denitrification activity

Active Publication Date: 2015-09-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic active components prepared by these methods are not firmly bonded to the filter material, and are easy to pulverize and fall off, which is not suitable for industrial production.

Method used

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  • Method for preparing manganese-base dedusting and denitration integration function filter material
  • Method for preparing manganese-base dedusting and denitration integration function filter material
  • Method for preparing manganese-base dedusting and denitration integration function filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Cut the polyphenylene sulfide (PPS) filter material.

[0028] 2. Preparation of silicone-modified polyurethane solution:

[0029] In the first step, add 0.71g of dimethyldiethoxysilane, 4.05g of phenyltriethoxysilane, and 0.4g of methyltriethoxysilane into a three-necked flask equipped with a magnetic stirrer, a reflux condenser, and a thermometer. Mix with 1g of water, reflux at 70°C for 4 hours, heat up to 90°C after the mixed solution becomes a homogeneous phase, distill off most of the ethanol, and then synthesize the organosilicon oligomer.

[0030] Step 2: Add 0.5 g of polyester polyol (hydroxyl value: 400 mgKOH / g) to the three-necked flask containing the silicone oligomer, react at 150° C. for 3 h, and dealcoholize to obtain a prepolymer.

[0031] The third step: add 0.3 g of diphenylmethane diisocyanate (MDI) and 2 mL of formamide to the prepolymer prepared in the previous step, and react for 2 h. Then add 20mL formamide and stir well until the solution is ...

Embodiment 2

[0038] 1. Measure a certain amount of the silicone-modified polyurethane binder solution prepared in Example 1, add formamide to prepare a solution with a solid content of 0.1, then immerse the dust removal filter material (PPS filter material) in the solution for 30 minutes . Take out the dust-removing filter material after impregnation, drain it, and dry it at 90°C for 30 minutes to obtain a viscous filter material;

[0039] 2. Weigh a certain amount of manganese oxide powder prepared in Example 1, and prepare an active component suspension with a solid-to-liquid ratio of 0.07 g / mL with water. Immerse the viscous filter material prepared in step 1 into the active component suspension, and immerse for 15 minutes under the condition of ultrasonic assistance. Take out the filter material, drain, and dry at 110°C for 3h, and at 180°C for 20h. The target product is obtained.

Embodiment 3

[0041] 1. Measure a certain amount of the silicone-modified polyurethane binder solution prepared in Example 1, add formamide to prepare a solution with a solid content of 0.1, then immerse the dust removal filter material (PPS filter material) in the solution for 30 minutes . Take out the dust-removing filter material after impregnation, drain it, and dry it at 90°C for 30 minutes to obtain a viscous filter material;

[0042]2. Weigh a certain amount of manganese oxide powder prepared in Example 1, and prepare an active component suspension with a solid-to-liquid ratio of 0.09 g / mL with water. Immerse the viscous filter material prepared in step 1 into the active component suspension, and immerse for 15 minutes under the condition of ultrasonic assistance. Take out the filter material, drain, and dry at 110°C for 3h, and at 180°C for 20h. The target product is obtained.

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Abstract

The invention discloses a method for preparing a manganese-base dedusting and denitration integration function filter material. The method is characterized by comprising first soaking a dedusting filter material in an organic silicone modified polyurethane adhesive solution to obtain a sticky filter material; adopting a potassium permanganate solution and a manganese nitrate solution to perform the liquid phase oxidation-reduction reaction, and preparing obtained nanoscale manganese oxide powder into a manganese oxide suspension; finally performing ultrasonic auxiliary soaking of the sticky filter material in the manganese oxide suspension, and performing drying and curing to obtain a target product. A preparation process is simple, the device requirements are low, the operability is high, the close integration of denitration active ingredients and the filter material can be effectively achieved, and the novel thinking and method are provided for achieving a denitration function of the filter material.

Description

technical field [0001] The invention relates to a preparation method of a manganese-based integrated functional filter material for dust removal and denitrification, and belongs to the technical field of air pollution control. Background technique [0002] Coal combustion will produce a large amount of harmful substances such as nitrogen oxides, dust and sulfur oxides. Nitrogen oxides are one of the main air pollutants, which not only endanger human health, but also cause serious environmental problems such as acid rain, photochemical smog, and greenhouse effect. Dust is also one of the air pollutants, especially the fine particles below PM10, which will not only weaken the intensity of solar radiation and ultraviolet rays, but also reduce the visibility of the atmosphere. In addition, particulate matter below PM2.5 is easily inhaled into human lungs, causing toxic pneumonia or silicosis, and even lung cancer. The removal of NOx or dust by a single removal method can no lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B01D46/02B01D53/86B01D53/56
Inventor 张先龙彭真吴雪平
Owner HEFEI UNIV OF TECH
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