Composite filtering material fiber used for SCR dust removal and denitration and preparation method of same

A composite filter material and fiber technology, which is applied in the post-treatment of nitrogen oxides and pollutant dust, to achieve the effects of strengthening the bonding strength, simplifying the process, and improving the denitrification efficiency of the system

Active Publication Date: 2017-09-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no relevant report on the coupling of oxides such as Mn, Ce, Zr, etc. to the dust filter fiber

Method used

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  • Composite filtering material fiber used for SCR dust removal and denitration and preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The steps of the composite filter fiber used for SCR dust removal and denitration based on polyimide fiber are as follows:

[0043] Step 1: Weigh 14.32g of 50wt% manganese nitrate solution, 4.34g of cerium nitrate hexahydrate, and 4.29g of zirconium nitrate pentahydrate, dissolve them in 250mL of deionized water, stir evenly to obtain solution A. Take 16 mL of 25 wt% ammonia aqueous solution, dilute to 200 mL with deionized water, and stir to obtain solution B (pH 10).

[0044] Step 2: Immerse the polyimide fiber in solution A for 40 minutes, and ultrasonic assist time for 7 minutes, then take out the infiltrated polyimide fiber from solution A, drain and immerse it in solution B, immerse and settle for 21 minutes, take out the fiber, and place The air atmosphere is aged for 4h.

[0045] Step 3: Put the aged fiber in a microwave reactor, microwave heat treatment for 20min, reaction conditions: microwave power 200W, microwave generation time 10s every 20s; then put it in a bla...

Embodiment 2

[0047] This example is the same as Example 1, except that the 50wt% manganese nitrate solution of this example is 3.58g, cerium nitrate hexahydrate 17.36g, and zirconium nitrate pentahydrate 4.29g, to obtain a bifunctional composite that supports metal oxides firmly Fiber #2.

Embodiment 3

[0049] This example is the same as Example 1, except that the 50wt% manganese nitrate solution of this example is 3.58g, cerium nitrate hexahydrate 4.34g, and zirconium nitrate pentahydrate 17.16g, to obtain a bifunctional composite that supports metal oxides firmly. Fiber #3.

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Abstract

The invention discloses a preparation method of a composite filtering material fiber used for SCR dust removal and denitration. The preparation method includes the steps of: 1) dissolving manganese salt, cerium salt and zirconium salt in water to prepare a salt solution A; 2) preparing an alkaline solution B being 8-12 in pH value; 3) soaking fibers in the salt solution A for infiltration, during infiltration, performing ultrasonic wave treatment for assistance for a certain time, and draining the infiltrated fibers and soaking the fibers in the alkaline solution B for impregnation and precipitation for 15-70 min; 3) taking the impregnated and precipitated fibers out and aging the fibers, performing microwave thermal treatment to the aged fibers, and finally activating the aged fibers to prepare the composite filtering material fiber. The composite filtering material fiber can enable oxides of Mn, Ce and Zr to be firmly bonded to the fibers, and enables active metal oxides to be dispersed more uniformly in the fibers. A bifunctional composite filtering material woven by the fibers can not only capture granules but also remove NOx in coal-fired flue gas.

Description

Technical field [0001] The invention relates to the post-treatment field of pollutant dust and nitrogen oxides in building materials industries such as coal-fired power plants and cement, glass, ceramics, etc., and in particular to a composite filter fiber used for SCR dust removal and denitration and a preparation method. Background technique [0002] Nitrogen oxides can endanger human health while causing damage to the ecological environment. It is an extremely widespread atmospheric pollutant. Among them, coal-fired boilers in power, building materials and other industries are an important source of nitrogen oxide emissions. Selective Catalytic Reduction (SCR) is the most widely used and most mature coal-fired boiler denitration technology. It has many advantages such as high denitrification efficiency, stable and reliable operation, and good selectivity. It has a market share in practical applications. More than 90. NH 3 It is currently the most commonly used reducing agent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D46/00B01D53/86B01D53/56B01D53/90B01J31/38B01J35/06
CPCB01D39/14B01D46/00B01D53/8628B01D53/90B01D2255/40B01D2258/0283B01J31/38B01J35/06
Inventor 王栋韩奎华彭悦路春美张亢李兵王羽
Owner SHANDONG UNIV
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