Preparation method of foaming stainless steel plate, and preparation method of heat-engine plant denitration catalyst

A technology of denitrification catalyst and stainless steel plate, applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instrument and method, etc., can solve the problems of poor binding force of titanium colloid coating, poor anti-clogging performance, poor catalytic activity, etc. Achieve the effects of improving the microporous structure and specific surface area, good anti-clogging performance, and increasing specific surface area

Inactive Publication Date: 2014-06-18
SHANGHAI LANGT ELECTRIC POWER ENVIRONMENTAL PROTECTION TECH +1
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  • Application Information

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Problems solved by technology

[0010] In order to solve the problems of small opening area, poor anti-clogging performance, poor catalytic activity and poor coating binding force of titanium colloid in the existing thermal power plant denitrification catalyst carrier, the invention provides a preparation method of a foamed stainless steel plate, Its technical scheme is as follows:

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  • Preparation method of foaming stainless steel plate, and preparation method of heat-engine plant denitration catalyst

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preparation example Construction

[0045] The preparation method of foamed stainless steel sheet adopts 5% (mass ratio) hydride foaming agent, mixes with aluminum melt, iron melt and chromium melt, adds hydride foaming agent, and adds the hydride foaming agent at a temperature of 500-1500r / min. Stir at a high speed at high speed, add 10% (mass ratio) polyvinyl alcohol as a solid foaming agent during the stirring process, pour it into the corresponding mold after stirring evenly, and enter the foaming machine for foaming. The foaming temperature is 540 ~ 650 ℃, The foaming time is 1-10min. After the foaming, the plate is taken out for cutting and modification to obtain the foamed stainless steel plate of the required specifications and requirements. The distance between the plates is 5-15mm, and the distance between the peaks of the folding plates is 30-70mm. This method Compared with the traditional catalyst, the prepared catalyst has larger open pore area and anti-ash blocking performance.

[0046] According t...

Embodiment 1

[0055] Preparation of foamed stainless steel plate:

[0056] Titanium hydride and polyvinyl alcohol are added to the iron-chromium-aluminum alloy melt, wherein, titanium hydride is used as a foaming agent, and polyvinyl alcohol is used as a solid foaming agent, and the addition of the hydride foaming agent is 5% by weight of the aluminum alloy, The amount of polyvinyl alcohol added is 0.5% of the weight of the aluminum alloy, and then the melt is stirred at a speed of 500r / min. After stirring evenly, the melt is poured into the cuboid cavity in the mold, and then the mold is put into the foaming machine. In the process, the melt was foamed at a temperature of 400 °C for 1 min. After the foaming treatment was completed, the plate was taken out from the mold cavity to obtain a foamed stainless steel plate.

[0057] Taking the above-mentioned foamed stainless steel plate as a carrier to prepare a thermal power plant denitration catalyst:

[0058] Step 1: Preparation of Titanium ...

Embodiment 2

[0070] Preparation of foamed stainless steel plate:

[0071] Titanium hydride and polyvinyl alcohol are added to the iron-chromium aluminum alloy melt, wherein, titanium hydride is used as a foaming agent, and polyvinyl alcohol is used as a solid foaming agent, and the addition of the hydride foaming agent is 7% by weight of the aluminum alloy, The amount of polyvinyl alcohol added is 3% of the weight of the aluminum alloy, and then the melt is stirred at a speed of 1000r / min. After stirring evenly, the melt is poured into the cuboid cavity in the mold, and then the mold is put into the foaming machine. In the process, the melt was foamed at a temperature of 550 °C for 5 min. After the foaming treatment, the plate was taken out from the mold cavity to obtain a foamed stainless steel plate.

[0072] Taking the above-mentioned foamed stainless steel plate as a carrier to prepare a thermal power plant denitration catalyst:

[0073] Step 1: Preparation of Titanium Colloid:

[00...

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Abstract

The invention discloses a preparation method of foaming stainless steel plate, and a preparation method of a heat-engine plant denitration catalyst, and belongs to the technical field of denitration catalyst. The preparation method of the denitration catalyst is capable of solving problems of existing denitration catalysts that carrier open pore area is small, and ash clogging resistance is poor. The preparation method of the foaming stainless steel plate comprises following steps: a hydride foaming agent and polyvinyl alcohol are added into aluminum alloy melt for uniform stirring; an obtained mixture is delivered into a mould, and is subjected to foaming treatment so as to obtain the foaming stainless steel plate. The foaming stainless steel plate is large in open pore area, and excellent in ash clogging resistance. The foaming stainless steel plate is taken as the carrier of the denitration catalyst, and the preparation method of the denitration catalyst comprises following steps: step 1, titanium gel is prepared; step 2, humic acid is added into the titanium gel for staling; step 3, the surface of the foaming stainless steel plate is coated with the titanium gel via spraying, and is dried and roasted; and step 4, the heat-engine plant denitration catalyst monomer is obtained via plate folding, brazing, and packaging. The denitration catalyst is wide in use temperature range, and low in use cost.

Description

technical field [0001] The invention belongs to the technical field of a catalyst for denitration of thermal power plant flue gas and a preparation method thereof, and particularly relates to a catalyst for denitration of thermal power plant flue gas with foamed stainless steel as a carrier. Background technique [0002] Nitrogen oxide is the main pollution source of the atmosphere. It not only causes a series of problems such as acid rain and photochemical smog that damage the earth's ecological environment, but also seriously endangers human health. Therefore, how to effectively remove nitrogen oxides has become an important topic in the field of environmental protection. Ammonia selective catalytic reduction (SCR) has become the mainstream denitrification technology for stationary sources such as thermal power plants due to its maturity and efficiency, and its core problem lies in the development of catalysts. At present, domestic and foreign scholars have carried out in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08B01J32/00B01J37/02B01J23/30B01J21/06B01D53/56B01D53/86
Inventor 张现龙姜瑞霞张蓓周坚刚
Owner SHANGHAI LANGT ELECTRIC POWER ENVIRONMENTAL PROTECTION TECH
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