Method for recycling waste selective catalytic reduction (SCR) catalyst
An SCR catalyst and resource utilization technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost and long process flow, and achieve low production cost, short process flow, The effect of increasing economic value
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Embodiment 1
[0019] A method for resource utilization of spent SCR catalysts. 20-28wt% activated waste SCR catalyst, 25-30wt% clay, 33-40wt% fly ash and 6-10wt% expansion agent are used as catalyst raw materials, mixed and ground until the particle size is less than 0.05 mm, namely A catalyst mixture is obtained.
[0020] Put the catalyst mixture into a disc granulator, spray water while rotating the disc until the catalyst mixture forms spherical catalyst particles with a particle size of 3 to 5 mm; then place the spherical catalyst particles at 105 to 110 drying under the condition of ℃, and then roasting under the condition of 1050-1100 ℃ for 15-25 minutes to prepare the ozone catalyst.
[0021] The preparation method of the activated waste SCR catalyst is as follows: the waste SCR catalyst is cleaned, washed with water and air-dried, crushed, ground to a particle size of less than 0.15 mm, and then placed in a muffle furnace at a rate of 4-6 °C / min. Raise the temperature to 680-710°C...
Embodiment 2
[0024] A method for resource utilization of spent SCR catalysts. 28-36wt% activated waste SCR catalyst, 30-35wt% clay, 21-28wt% fly ash and 7-11wt% expansion agent are used as catalyst raw materials, mixed and ground until the particle size is less than 0.05 mm, namely A catalyst mixture is obtained.
[0025] Put the catalyst mixture into a disc granulator, spray water while rotating the disc until the catalyst mixture forms spherical catalyst particles with a particle size of 3 to 5 mm; then place the spherical catalyst particles at 105 to 110 drying at 1080-1120°C for 18-27 minutes to prepare an ozone catalyst.
[0026] The preparation method of the activated waste SCR catalyst is as follows: the waste SCR catalyst is cleaned, washed with water and air-dried, crushed, ground to a particle size of less than 0.15 mm, and then placed in a muffle furnace at a rate of 4-6 °C / min. Raise the temperature to 685-712°C at a rate of 20-30 minutes, then raise the temperature to 785-81...
Embodiment 3
[0029] A method for resource utilization of spent SCR catalysts. 36-44wt% activated waste SCR catalyst, 15-20wt% clay, 27-34wt% fly ash and 8-12wt% expansion agent are used as catalyst raw materials, mixed and ground until the particle size is less than 0.05 mm, namely A catalyst mixture is obtained.
[0030] Put the catalyst mixture into a disc granulator, spray water while rotating the disc until the catalyst mixture forms spherical catalyst particles with a particle size of 3 to 5 mm; then place the spherical catalyst particles at 105 to 110 drying under the condition of ℃, and then roasting under the condition of 1120-1150 ℃ for 20-28 minutes to prepare the ozone catalyst.
[0031] The preparation method of the activated waste SCR catalyst is as follows: the waste SCR catalyst is cleaned, washed with water and air-dried, crushed, ground to a particle size of less than 0.15 mm, and then placed in a muffle furnace at a rate of 4-6 °C / min. Raise the temperature to 690-715°C...
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