Pre-dedusting, desulfuration and denitration integrated processing device and method

Abstract

The invention belongs to the technical field of air pollution control, particularly relates to a processing device and method with pre-dedusting as well as desulfuration and denitration. The device comprises a pre-dedusting region, a desulfuration region, a buffer region and a denitration region which are connected in turn from bottom to top, wherein an air inlet connected with a flue is formed under the pre-dedusting region; an air outlet connected with a chimney is formed above the denitration region; the pre-dedusting region comprises a flue-dust retainer and a guide plate located above theflue-dust retainer; a flue-dust collecting region formed by the flue-dust retainer and the guide plate penetrates through the middle of the desulfuration region; the desulfuration region and the denitration region are connected with an ammonia gas conveying pipe and a storage silo for placing active coke; the buffer region includes a mixed ammonia cylinder wall; and the upper part, the middle part and the lower part of the mixed ammonia cylinder wall are respectively equipped with an air deflector, an ammonia spraying tube and a flow equalizing plate. This processing system is low in investment and building cost and operation cost, can switch among a desulfuration and denitration integrated mode, a desulfuration mode and a denitration mode according to components of flue, rapidly improvesflue processing amount through a parallel connection manner of reactors, so as to solve the problem that flue amount of enterprises is too large.

Description

technical field [0001] The invention belongs to the purification technology of desulfurization and denitrification of industrial furnace flue gas, relates to the technical field of air pollution control, and in particular relates to a treatment device and method with pre-dust removal and combined desulfurization and denitrification. Background technique [0002] With the rapid development of the modern industrialization process in various countries in the world, environmental protection has become a hot spot of concern to the world. With the rapid development of my country's economy, my country's energy consumption has also increased year by year, which has increased the consumption of coal, the most important energy raw material, which has resulted in an increase in the emissions of major atmospheric pollutants SO2 and NOx. According to statistics, in 2014, the national SO2 emissions reached 19.74 million tons, and in terms of NOx, the total emissions in 2014 reached 21.25 ...

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Problems solved by technology

[0004] In view of this, the present invention provides an integrated device for dust removal, denitrification and desulfurization in order to solve the problems of complex structure, cumbersome operation and high processing cost in the prior art

The purpose of the present invention is to solve the problem of industrial kiln flue gas pollutant dust, NOx, SO 2 In the purification process, the problem of hierarchical treatment, easy clogging of carbon-based catalysts, low utilization rate, and low system denitrification efficiency, the present invention provides a desulfurization and denitration denitrification system with reasonable structure, low operating cost, high purification efficiency, wide application range and easy promotion. Integrated device

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