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A kind of SCR denitration catalyst with high activity and anti-sulfur and preparation method thereof

A denitration catalyst and high-activity technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high catalyst preparation cost, easy blockage and corrosion of air preheater, and high conversion rate. Excellent denitration efficiency, preventing clogging and corrosion, reducing conversion rate

Active Publication Date: 2022-07-26
CHINA HUADIAN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome the SCR catalyst SO in the prior art 2 / SO 3 To solve the problems of high conversion rate, easy plugging and corrosion of air preheater, and high catalyst preparation cost, so as to provide a sulfur-resistant SCR denitration catalyst with high denitration activity and its preparation method

Method used

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  • A kind of SCR denitration catalyst with high activity and anti-sulfur and preparation method thereof
  • A kind of SCR denitration catalyst with high activity and anti-sulfur and preparation method thereof
  • A kind of SCR denitration catalyst with high activity and anti-sulfur and preparation method thereof

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Effect test

Embodiment 1

[0052] The present embodiment provides an SCR denitration catalyst, and its preparation method is:

[0053] (1) Preparation of carrier

[0054] (1) Add titanium dioxide, nanoscale carbon black, ammonium bicarbonate, polyethylene oxide, sodium methyl cellulose (CMC) into the mixer, and mix at 1200r / min for 5min to obtain material 1; The mass ratio of white powder, nano-scale carbon black, ammonium bicarbonate, polyethylene oxide and sodium carboxymethyl cellulose is 420:5:1:5:2;

[0055] (2) Add ionized water, ammonia water and lactic acid to material 1 in turn, keep the rotation speed unchanged, stir for 10 minutes, then add glass fiber and continue stirring for 15 minutes to obtain material 2; wherein, the ammonia water is an aqueous solution containing 25%-28% of ammonia, The mass ratio of deionized water, ammonia water, lactic acid, glass fiber and silicic acid is 120:25:30:45:5;

[0056] (3) Kneading the material 2, the rotating speed is 400r / min, the time is 2h, and ext...

Embodiment 2

[0067] The present embodiment provides an SCR denitration catalyst, and its preparation method is:

[0068] (1) Preparation of carrier

[0069] (1) adding titanium dioxide, water-soluble starch, ammonium bicarbonate, polyethylene oxide, sodium carboxymethyl cellulose (CMC) into the mixer, and mixing at 1500r / min rotating speed for 4min to obtain material 1; The mass ratio of white powder, water-soluble starch, ammonium bicarbonate, polyethylene oxide and sodium carboxymethyl cellulose is 420:5:1:5:2;

[0070] (2) Add ionized water, ammonia water and lactic acid to material 1 in turn, keep the rotation speed unchanged, stir for 12 minutes, then add glass fiber and continue stirring for 12 minutes to obtain material 2; wherein, the ammonia water is an aqueous solution containing 25%-28% of ammonia, The mass ratio of deionized water, ammonia water, lactic acid, glass fiber and silicic acid is 120:30:25:40:5;

[0071] (3) Kneading the material 2, the rotating speed is 350r / min, ...

Embodiment 3

[0082] The present embodiment provides an SCR denitration catalyst, and its preparation method is:

[0083] (1) Preparation of carrier

[0084] (1) Add titanium dioxide, nano-carbon fiber, ammonium bicarbonate, polyethylene oxide, sodium carboxymethyl cellulose (CMC) into the mixer, and mix at 1000r / min for 10min to obtain material 1; wherein, titanium dioxide is , the mass ratio of carbon nanofibers, ammonium bicarbonate, polyethylene oxide, and sodium carboxymethyl cellulose is 420:6:1:5:2;

[0085] (2) adding ionized water, ammonia water and lactic acid to material 1 in turn, keeping the rotational speed constant, stirring for 8 minutes, then adding glass fiber and continuing to stir for 10 minutes to obtain material 2; wherein, the ammonia water is an aqueous solution containing 25%-28% of ammonia, The mass ratio of deionized water, ammonia water, lactic acid, glass fiber and silicic acid is 100:20:30:25:3;

[0086] (3) Kneading material 2, the rotating speed is 550r / min...

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Abstract

The invention discloses a highly active sulfur-resistant SCR denitration catalyst, comprising a carrier and active components, wherein the raw materials of the carrier include titanium dioxide, a pore-enlarging agent, a binder, a dispersant and a reinforcing agent; the active component is V 2 O 5 and WO 3 , the active component V 2 O 5 , WO 3 The mass ratio to the carrier is 0.05‑0.5:3‑10:100. The invention also discloses a preparation method of the high-activity sulfur-resistant SCR denitration catalyst. Compared with the prior art, the highly active sulfur-resistant SCR denitration catalyst provided by the present invention has an active component V. 2 O 5 Low content, high denitration efficiency, SO 2 / SO 3 It has the advantages of low conversion rate, low preparation cost, high mechanical strength and easy regeneration.

Description

technical field [0001] The invention belongs to the field of air pollution control, and in particular relates to a highly active sulfur-resistant SCR denitration catalyst and a preparation method thereof. Background technique [0002] In the internal structure of thermal power in my country, coal-fired power generation is mainly used, and coal-fired power generation will release nitrogen oxides (NO x ), while NO emitted into the atmosphere x It is one of the main sources of pollution such as atmospheric acid rain and photochemical smog. Therefore, my country's environmental protection department requires thermal power plants to strictly control NO x emissions. At present, more than 90% of coal-fired power plants at home and abroad use selective catalytic reduction (SCR) technology to remove NO in the tail gas of power plants x . The core of SCR technology is denitration catalyst, and the most widely used commercial catalysts in engineering are vanadium-titanium catalysts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J35/10B01J37/02B01D53/86B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01J23/002B01J23/30B01J37/0205B01J37/0207B01J35/60
Inventor 胡小夫汪洋王云苏军划耿宣李伟王桦
Owner CHINA HUADIAN ENG
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