Drop-shaped slurry spray pipe for wet flue gas desulfurization

Abstract

The invention discloses a wet process flue gas desulfurization water drop-shaped grout spraying pipe, comprising a grout main pipe and branch pipes connected with the grout main pipe. The wet process flue gas desulfurization water drop-shaped grout spraying pipe is characterized in that the section of the grout main pipe is water drop-shaped; the sections of the branch pipes are round; the branch pipes connected to the grout main pipe at the same height form a vein-shaped single-layer grout pipe network; the grout main pipe is a hollow shell, is straight and flat in unfolding direction and is the same as the adsorption tower of a desulfurization system in diameter. Compared with the traditional grout main pipe with the round section, especially under the condition that the pipe diameter is larger, the grout pipe can better adapt to and fit with a smoke flowing field due to the reasonable water drop-shaped streamline section design, a vortex region can be reduced, the differential pressure resistance can be reduced, the smoke flow uniformity can be improved, and further the desulfurization efficiency and the operational reliability of the whole system can be improved.

Description

technical field [0001] The invention relates to a limestone slurry spray system in a wet flue gas desulfurization system, in particular to a slurry spray pipe, which belongs to the technical field of environmental protection equipment applications. Background technique [0002] Limestone-gypsum wet flue gas desulfurization technology is currently the desulfurization technology with the most mature technology, the most practical performance and the most stable operation in the world, and it is also a desulfurization technology with the most operation performance in large coal-fired power plants in my country. [0003] The absorption tower and its internal components are one of the most critical equipment in the desulfurization system. For the spray absorption tower, the reasonable design of the limestone slurry spray layer is very important. The spray layer is composed of spray pipes and nozzles. The limestone slurry is distributed through the spray pipes to evenly distribut...

AI Technical Summary

Problems solved by technology

The large-diameter slurry main pipe will form a large-scale recirculation zone downstream, and the flue gas velocity in this zone is low and vortex-shaped, resulting in increased pressure loss and increased velocity field inhomogeneity

In addition, considering the space and difficulty in the layout of pipelines and circulating pumps in engineering, the staggered angle of two adjacent spraying main pipes is set to be small, generally about 20°, and the vertical distance between two spraying pipes is usually 1 ~ 2m (Generally 1.5-1.7m), which makes the influence areas of adjacent spraying main pipes overlap each other, further increasing the pressure loss, and also enhancing the unevenness of the smoke distribution, hindering the uniform mixing of gas and liquid. Finally, the desulfurization efficiency is reduced, which directly affects the performance parameters and operational reliability of the wet flue gas desulfurization system

Images