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Scr denitrification catalyst and preparation method thereof

A technology of denitration catalyst and dilute nitric acid, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to improve mechanical service life, improve wear resistance, improve sulfur resistance and alkali metal resistance The effect of the poison ability

Active Publication Date: 2019-09-24
江苏浩日朗环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of SCR denitrification catalyst and its preparation method, solve the comprehensive use of glass factory kiln dust and widen the raw material channel of SCR catalyst manufacturing enterprises

Method used

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  • Scr denitrification catalyst and preparation method thereof
  • Scr denitrification catalyst and preparation method thereof
  • Scr denitrification catalyst and preparation method thereof

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preparation example Construction

[0046] The preparation method of the denitrification catalyst is to use the above solid solution as the matrix material, the above matrix material contains the active material vanadium pentoxide, and at the same time add glass fiber, wood pulp, binder, wollastonite, deionized water and ammonia water, etc. to mix and filter , extrusion, drying and roasting.

[0047] In the above technical solution, according to the mass ratio, matrix material: glass fiber: wood pulp: binder: wollastonite: deionized water: ammonia water = 50~65:5~8:1~5:0.5~2:1 ~3: 20~30: 5~10.

[0048] In the above technical scheme, the speed of mixing is 300~500r / min, the time is 5~8h; the pressure of filtration is 3~5MPa, the pressure of extrusion is 4~6MPa, the drying condition is 40~60℃, and the drying time is 192 ~264h, the calcination temperature is 550~620℃, and the calcination time is 30~35h.

[0049] This technical solution can better solve the dust treatment produced by the furnace of the glass facto...

Embodiment 1

[0052] The preparation method of SCR denitration catalyst comprises:

[0053] (1) Use deionized water to remove water-soluble impurities in the dust generated by glass furnaces;

[0054] (2) Under the condition of stirring, use dilute nitric acid to dissolve the dust, the stirring speed is 30r / min, and the cleaning time is 4h, at least the potassium oxide and sodium oxide substances in the dust are cleaned, and the mass ratio of 88% is added during the stirring process Titanium dioxide;

[0055](3) Extract the undissolved precipitate, and use a filter bag with a pore size of 0.3 μm to filter, collect and purify;

[0056] (4) Dry at 120°C for 8 hours;

[0057] (5) Roasting at 450°C for 4 hours;

[0058] (6) Crushing, the average particle size of the product is 2 μm;

[0059] (7) The raw material powder is dissolved to form a solid solution;

[0060] (8) Use solid solution as the matrix material, and then add glass fiber, wood pulp, binder, wollastonite, deionized water and...

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Abstract

The invention discloses a SCR denitration catalyst. The SCR denitration catalyst comprises a base material and auxiliaries doped in the base material, wherein the base material comprises power purified from dust generated in a glass furnace, and further comprises titanium dioxide doped in the powder. The invention further discloses a synthesis method for a catalytic material, and the synthesis method comprises the following steps: (1) cleaning dust generated by the glass furnace to remove impurities which can be dissolved into water; (2) stirring and dissolving the dust into diluted nitric acid or diluted hydrochloric acid, meanwhile, adding titanium dioxide to at least remove potassium oxide and sodium oxide in dust; (3) extracting un-dissolved precipitates; and (4) drying, roasting and crushing to obtain raw material powder. The SCR denitration catalyst can solve treatment of dust generated by the glass plant furnace, recycles resources, and expands the raw material supply channel ofthe SCR denitration catalyst manufacturing enterprises. The prepared SCR denitration catalyst is improved in the aspects of sulfur resistance, alkaline metal poisoning resistance and wear resistance.

Description

technical field [0001] The application relates to the field of denitration catalyst preparation, in particular to an SCR (selective catalytic reduction) denitration catalyst and a preparation method thereof. Background technique [0002] Glass furnace dust is mainly inorganic substances, all of which exist in the form of metal oxides, which are discarded as solid waste in conventional treatment methods, resulting in waste of resources and non-comprehensive utilization. [0003] Some glass factories also use this dust as a mixing additive for cement. However, considering the regional gap between the glass factory and the cement factory and transportation problems, this treatment method cannot be widely used. [0004] This kind of dust is used as a raw material for making floor tiles, which can be realized in the preparation process, but the dust contains vanadium pentoxide and other heavy metals, which has adverse effects on the use environment, so it is not popularized and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01J37/08B01D53/86B01D53/56
Inventor 施雅琼张现龙
Owner 江苏浩日朗环保科技有限公司
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