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Wet process flue gas desulfurization water drop-shaped grout spraying pipe

A technology of wet flue gas desulfurization and spray pipe, which is applied in the field of slurry spray pipe and spray system, which can solve the problems of reduced desulfurization efficiency, enhanced flue gas distribution unevenness, and hindered uniform mixing of gas and liquid.

Active Publication Date: 2013-12-18
中建中环新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Wet process flue gas desulfurization water drop-shaped grout spraying pipe
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  • Wet process flue gas desulfurization water drop-shaped grout spraying pipe

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings. Take the wet flue gas desulfurization system of a 300MW unit as an example. For layout of absorption tower and slurry supervisor, see figure 1 and figure 2 . Three layers of slurry spray layers are set in the absorption tower. The slurry main pipes of each spray layer are hollow shells composed of drop-shaped section lines, see image 3 . The slurry main pipe is straight and has the same diameter as the absorption tower. The slurry supervisors of each layer are arranged in a staggered order up and down, and the staggered angle is 20°. The vertical distance between adjacent spray layers is 2m. The branch pipe connected to the main slurry pipe adopts a round pipe, and the single-layer slurry pipe network is in the shape of a leaf vein, so that the limestone slurry can completely cover the horizontal section of the absorption tower.

[0026] In the x-y coordinat...

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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...

Claims

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Application Information

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IPC IPC(8): B05B1/22B05B13/02B01D53/80B01D53/50
Inventor 李娜李睦陈茂兵王烨
Owner 中建中环新能源有限公司
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