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Dehydration method and apparatus of flue gas desulfurization gypsum slurry

A technology for desulfurizing gypsum and gypsum slurry, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of easy blockage, easy corrosion, easy wear, etc., and is not easy to corrode, easy to wear, and reduces the power consumption of the system. Effect

Active Publication Date: 2007-07-11
国能朗新明环保科技有限公司
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  • Abstract
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Problems solved by technology

[0003] The invention provides a dehydration method and device for flue gas desulfurization gypsum slurry, which solves the problems of high energy consumption, easy blockage, easy wear, and easy corrosion of traditional processes; at the same time, it solves the problems of reducing power consumption, reducing equipment investment and operation and maintenance costs, and reducing fuel consumption. The cost of coal boiler flue gas desulfurization project; also solve the problem of making full use of the original flue gas heat and further improving the effect of flue gas desulfurization

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  • Dehydration method and apparatus of flue gas desulfurization gypsum slurry

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Embodiment

[0024] Embodiment Referring to Fig. 1, an embodiment of the dehydration method of the flue gas desulfurization gypsum slurry of the present invention:

[0025] (1), after the gypsum slurry is discharged from the lower part of the desulfurization absorption tower 7, it is sent to the spray device 1 built in the upper part of the drying tower 2 through the gypsum discharge pump 5, and atomized into fine gypsum slurry droplets;

[0026] (2), at the same time as (1), the high-temperature flue gas in the former flue 9 is sent into the spraying device below in the drying tower by the booster fan 6;

[0027] (3), in the drying tower, the gypsum slurry droplets in the above (1) are dried into gypsum by the high-temperature flue gas in (2);

[0028] (4), the dried gypsum is discharged through the gypsum ejector 4 at the bottom of the drying tower;

[0029] (5) At the same time, after the flue gas discharged from the drying tower is mixed with the high-temperature flue gas from the sec...

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Abstract

The dewatering method and device for gypsum slurry in flue gas desulphurization comprise: connecting a drying tower near the desulphurization absorption tower with a slurry discharge pipe on bottom connected to the sprayer unit on drying tower top by a gypsum discharge pump; connecting the first branch pipe of flue gas channel to the smoke inlet on bottom of the drying tower by an in-series booster fan, a gypsum moisture controller or flue gas distributor; joining the flue gas outlet pipe with the second branch pipe and connecting to the flue gas inlet of the absorption tower; connecting the exhaust flue gas channel of the absorption tower with the chimney. This invention makes full use of original flue gas heat with small area and volume to complete dewater, and improves desulphurization effect fit to wide application.

Description

(1) Technical field [0001] The invention relates to a dehydration method and device for gypsum slurry used in a limestone-gypsum wet flue gas desulfurization process in a thermal power plant. (2) Background technology [0002] Power plants and industrial boilers usually use coal as fuel, which produces harmful substances such as sulfur dioxide during combustion. Limestone-gypsum wet flue gas desulfurization process is widely used in large coal-fired boilers to remove sulfur dioxide in flue gas. The limestone-gypsum wet flue gas desulfurization plant produces a large amount of gypsum slurry during operation, and the gypsum slurry is composed of a certain concentration of gypsum, unreacted limestone particles and about 80% of water. Removing the moisture in the desulfurized gypsum slurry is an important process of desulfurized gypsum treatment. In traditional devices, hydrocyclones and vacuum belt dehydration systems are usually used to complete the dehydration of gypsum slu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B11/02B01D53/48
Inventor 程日旺张立陈志强张世乾朱庆芳
Owner 国能朗新明环保科技有限公司
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