A method for regeneration and utilization of spent denitrification catalyst
A denitration catalyst and catalyst technology, which are applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of difficulty in guaranteeing the original mechanical properties, and achieve good regeneration and catalytic effect, reduce investment, and operation. simple effect
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Embodiment 1
[0027] First, purge the scrap denitrification catalyst to remove the surface deposits, the purge gas is air, and the flow rate of the purge gas is 0.01m 3 / s, the gas pressure is 0.2MPa; the scrapped catalyst after purging treatment is crushed into a block catalyst 1 with a size of 3-20cm; then the scrapped denitrification catalyst is rinsed with deionized water to remove the surface stains and the surface layer of the catalyst, The flushing pressure is 0.1 MPa; then the catalyst is dried at 150°C for 5 hours; finally, the catalyst is reassembled, and a multi-level mesh layer 2 is set in the denitration reactor, and then the block-shaped regenerated catalyst 1 is evenly arranged on the Each level of network layer in the multi-level network layer constitutes the catalyst unit body 3; the activity of the obtained catalyst unit body 3 can be restored to 85% of the new catalyst.
Embodiment 2
[0029] First, purge the scrap denitrification catalyst to remove the surface deposits, the purge gas is nitrogen, and the flow rate of the purge gas is 0.3m 3 / s, the gas pressure is 0.4MPa; the spent catalyst after purging treatment is crushed into a block catalyst 1 with a size of 3–20 cm; then, the spent denitrification catalyst is ultrasonically cleaned with deionized water to remove the stain on the surface of the catalyst and its surface layer , the ultrasonic cleaning time is 20min; then the catalyst is dried at 600°C for 4h; finally, the catalyst is reassembled, and a multi-level mesh layer 2 is set in the denitration reactor, and then the block regenerated catalyst 1 is evenly arranged on the Each level of network layer in the multi-level network layer constitutes the catalyst unit body 3; the activity of the obtained catalyst unit body 3 can be recovered to 86% of the new catalyst.
Embodiment 3
[0031] Firstly, the spent denitrification catalyst is purged to remove surface deposits, the purge gas is air, and the flow rate of the purge gas is 0.6m 3 / s, the gas pressure is 0.6MPa; the scrapped catalyst after purging treatment is crushed into a block catalyst 1 with a size of 3–20 cm; The flushing pressure is 1 MPa; then the catalyst is dried at 200°C for 4.5 hours; finally, the catalyst is reassembled, and a multi-level mesh layer 2 is set in the denitration reactor, and then the block-shaped regenerated catalyst 1 is evenly arranged on the Each level of network layer in the multi-level network layer constitutes the catalyst unit body 3; the activity of the obtained catalyst unit body 3 can be restored to 87% of the new catalyst.
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