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A spray tower for flue gas desulfurization and its running method

A spray tower and flue gas technology, applied in the field of flue gas purification, can solve the problems of high equipment investment and operating costs, complex spray tower system, large slurry circulation volume, etc., achieve low construction cost, prolong residence time, reduce The effect of investment

Active Publication Date: 2008-04-16
BEIJING BOOTES ELECTRIC POWER SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spray tower still has problems such as complex system, high equipment investment and high operating cost. How to solve these problems is the most concerned issue of researchers from various countries.
[0003] At present, many domestic units have introduced wet limestone-gypsum flue gas desulfurization technology from abroad. The tower type used is mainly a spray tower. Usually, the flue gas flow rate is about 3.5-4m / s, and the tower body is large and high. Large slurry circulation, high energy consumption, high equipment investment and operating costs

Method used

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  • A spray tower for flue gas desulfurization and its running method
  • A spray tower for flue gas desulfurization and its running method

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Embodiment 1

[0029] A spray tower for the flue gas desulfurization device of a 600MW coal-fired generator set, with a flue gas flow rate of 2 million standard cubic meters per hour, and a sulfur dioxide content of 2000 ppm in the flue gas. The absorbent used is limestone powder passing 90% of 325 mesh.

[0030] The spray tower is composed of a tower body 24, a tower top 4, a flue gas inlet 1, and a flue gas outlet 9. The diameter of the tower body 24 is 21.28 meters, the gypsum slurry level in the slurry pool is 4.3 meters, and the height of the tower top is 21.9 meters. The upper edge of the flue gas inlet 1 is level with the top of the spray tower, and the size of the flue gas inlet 1 is 4890H×14670L. A mist eliminator 8 is installed in the flue gas outlet 9. The size of the mist eliminator 8 is 9550H×17210L×5000W. The demister is provided with four spray layers to prevent fouling. The flue gas outlet 9 is equipped with a demister. The lower edge of the mister area is 1 meter higher than the...

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PUM

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Abstract

The present invention relates to a cylindrical spraying tower for eliminating the sulfur dioxide in the flue gas and a method for eliminating the sulfur dioxide in the flue gas with the spraying tower thereof, wherein the spraying tower is provided with two vertical clapboards and is provided with a defroster at the outlet, the clapboard is provided with an opening thereby dividing the absorbing area to three areas and dividing the serous fluid tank into two sections. The flue gas contacts with the spraying serous fluid concurrently and then countercurrent in the area of the absorbing area and is discharged through the defroster. The excellent desulfurizing effect is realized and the method is especially suitable for the wet limestone gypsum flue gas desulfurization technique of the large-scale thermal power plant with the power more than 300MW.

Description

Technical field [0001] The invention is applied to the technical field of flue gas purification, and relates to a wet limestone-gypsum flue gas desulfurization spray tower used for removing sulfur dioxide in flue gas. Background technique [0002] The wet limestone-gypsum flue gas desulfurization process is the most commonly used process in the field of flue gas desulfurization in thermal power plants. The main principle is to use slurry to scrub the flue gas to remove sulfur dioxide. Limestone acts as an absorbent and the final product is gypsum. The core equipment of this process is the absorption tower. Common forms of absorption towers include packed towers, liquid column towers, countercurrent spray towers, and downstream spray towers, among which spray towers are the most widely used tower type. However, the spray tower still has problems such as complex system, high equipment investment and high operating cost. How to solve these problems is the most concerned issue by res...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
Inventor 白云峰张明范新宽
Owner BEIJING BOOTES ELECTRIC POWER SCI & TECH
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