Spray device capable of meeting desulfurization towers under different working conditions of CFB (circulating fluidized bed) boiler

Abstract

The invention relates to a spray device capable of meeting desulfurization towers under different working conditions of a CFB (circulating fluidized bed) boiler and belongs to the environmental protection field. Each spray layer contains a main water inlet pipe, a plurality of branch pipes and a bearing beam for fixation, wherein each main water inlet pipe is a pipe adopting reducing type change, the branch pipes are arranged on pipes with different diameters, and spray heads arranged on the branch pipes; the bearing beams are fixedly connected with the wall of a spray tower; multiple spray layers are fixed in the spray tower, and the vertical positions of the main water inlet pipes of all the spray layers are not overlapped. Through combination of forward-flow spray with reverse-flow spray, angle arrangement of the spray heads and arrangement of directions of the spray layers, the conditions that the desulfurization tower scales, is blocked and has spray dead corners are eliminated fundamentally, so that the desulfurization efficiency of the desulfurization tower is improved, and the spray device has characteristics of reliability in operation, convenience in operation and high adaptability to flue gas change in engineering practice. The reaction environment is optimized, the size of the tower body is narrowed, and the design principle of simplicity and reliability is embodied. Conciseness, high efficiency and reliability are realized indeed.

Description

technical field [0001] The invention relates to a spray device capable of satisfying desulfurization towers under different working conditions of a CFB boiler, and belongs to the field of environmental protection. Background technique [0002] The world's first commercially operated FGD system was put into operation in the UK in 1930. In the early 1970s, the United States and Japan started large-scale desulfurization plant construction. Since the 1980s, Europe has started the construction of desulfurization systems. Germany’s FGD technology started later than the United States and Japan. However, driven by the strict environmental protection regulations of the German government, FGD has been rapidly developed and applied, and has the world’s largest capacity desulfurization device. At present, there are about 14 countries in the world that have built desulfurization plants in North America, Europe, Asia and Oceania. [0003] The desulfurization tower is a device for desulfu...

AI Technical Summary

Problems solved by technology

[0004] The existing technology usually adopts a single countercurrent spraying method, the layout of the nozzles is unreasonable, and the layout of the spray layer is unscientific, which often leads to the fact that the water from the nozzles cannot completely cover all the spaces in the tower or directly wash the tower wall, causing damage to the anti-corrosion layer and directly affecting the entire desulfurization. Safe operation and service life of the tower

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