A low-temperature dripping water absorption catalytic denitrification method
A catalytic denitration and absorption technology, applied in the field of flue gas denitrification, can solve the problems of low operating cost, large ozone consumption, low flue gas denitration efficiency, etc., and achieve the effects of wide application range, simple treatment process and stable denitration effect.
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Embodiment 1
[0027] A low-temperature drip absorption catalytic denitrification method, comprising the following steps: setting the catalyst layer horizontally, the low-temperature flue gas at 90°C flows through the catalyst layer from bottom to top, and the flue gas space velocity is 8000h -1 , continuously spray water mist to the catalyst layer above the catalyst layer, the ratio of the sprayed water mist flow rate to the flue gas flow rate is 1%:1, so that the catalyst layer is in a wet state, and the NO in the flue gas is oxidized under the catalytic action of the catalyst for NO 2 , the generated NO 2 Absorbed by water mist, nitric acid droplets are generated, and the nitric acid droplets flow down the catalyst wall and are collected at the bottom of the catalyst layer.
[0028] The catalyst comprises activated carbon porous carrier and cobalt oxide and tungsten oxide loaded on the activated carbon porous carrier. The removal efficiency of NO in flue gas is 95%.
Embodiment 2
[0030] A low-temperature drip absorption catalytic denitrification method, comprising the following steps: setting the catalyst layer horizontally, low-temperature flue gas at 150°C flows through the catalyst layer from bottom to top, and the flue gas space velocity is 10000h -1 , continuously spray water mist to the catalyst layer above the catalyst layer, the ratio of the sprayed water mist flow rate to the flue gas flow rate is 0.1%:1, so that the catalyst layer is in a wet state, and the NO in the flue gas is oxidized under the catalytic action of the catalyst for NO 2 , the generated NO 2 Absorbed by water mist, nitric acid droplets are generated, and the nitric acid droplets flow down the catalyst wall and are collected at the bottom of the catalyst layer.
[0031] The catalyst includes active coke porous carrier and nickel oxide loaded on the active coke porous carrier. The catalyst is granular, and the granular catalyst is loaded on the network structure to form a ca...
Embodiment 3
[0033] A low-temperature drip absorption catalytic denitrification method, comprising the following steps: setting the catalyst layer horizontally, low-temperature flue gas at 120°C flows through the catalyst layer from bottom to top, and the flue gas space velocity is 4000h -1 , continuously spray water mist to the catalyst layer above the catalyst layer, the ratio of the sprayed water mist flow rate to the flue gas flow rate is 0.01%:1, so that the catalyst layer is in a wet state, and the NO in the flue gas is oxidized under the catalytic action of the catalyst for NO 2 , the generated NO 2 Absorbed by water mist, nitric acid droplets are generated, and the nitric acid droplets flow down the catalyst wall and are collected at the bottom of the catalyst layer.
[0034] The catalyst comprises activated carbon porous carrier and copper oxide and iron oxide loaded on the activated carbon porous carrier. The catalyst layer is a plate catalyst. The removal efficiency of NO in ...
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