Online activation method of catalytic oxidation VOCs catalyst

Abstract

The invention discloses an online activation method of a catalytic oxidation VOCs catalyst. The method comprises the following steps: 1, purging: purging a deactivated catalyst with 200-300 DEG C hotair for 2-3 h to remove oil stains and dusts adsorbed on the catalyst; 2, spraying: naturally cooling the catalyst to normal temperature after the purging is completed, spraying an activation supplementing solution on the catalyst at a speed of 15-60 mL / min, standing overnight to make sprayed active components fully permeate into catalyst holes and the interior of the catalyst, wherein the spraying amount is 30-60% of the weight of a catalyst carrier; and 3, calcining: calcining the catalyst, sprayed with the activation supplementing solution, with the 200-300 DEG C hot air for 1-5 h at an airspeed of 3000-7000 h<-1> in order to finish online activation of the deactivated catalyst. The online activation method of the catalytic oxidation VOCs catalyst makes the performance of the activatedcatalyst recovered to 90% or above of the performance of a fresh catalyst product, prolongs the service life of the catalyst by 1-1.5 years, reduces the loss of the catalyst, and reduces the operation cost of the catalyst by 1 / 3 to 1 / 2.

Description

technical field [0001] The invention relates to the technical field of VOCs catalysts, in particular to an online activation method for catalytic oxidation of VOCs catalysts. Background technique [0002] Globally, natural sources of volatile organic compounds (VOCs) emissions are much higher than man-made sources, but in some industrial-intensive areas of my country, man-made sources of VOCs emissions are much higher than natural sources. In recent years, my country's total VOCs emissions have increased year by year. Chen Ying et al. used the emission factor method to estimate that my country's industrial VOCs emissions in 2009 were about 12 million tons. According to the average annual growth rate of 11.5%, the current total annual VOCs emissions in my country have far exceeded 20 million tons. VOCs emissions are large and harmful, not only directly endangering human health, but also photochemically react with nitrogen oxides under certain meteorological conditions, causi...

AI Technical Summary

Problems solved by technology

The effective active components of catalysts used for VOCs treatment are mainly precious metals such as platinum, palladium, rhodium, etc., and most of them are imported and expensive

The cost of the catalyst accounts for more than 1 / 2 of the operating cost of the entire VOCs treatment project. If the service life of the catalyst is greatly shortened due to deactivation, it will be a lot of money to replace the new catalyst. In addition, the cost of hazardous waste disposal of the waste catalyst, For environmental protection facilities that generate little or no economic benefits, it further increases the burden on corporate operations

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