Filter-cloth-type disc dehydrator

Abstract

The invention provides a filter-cloth-type disc dehydrator. The filter-cloth-type disc dehydrator comprises a main machine system and a vacuum system; the main machine system comprises a rotating device and a plurality of filter discs; two ends of the rotating device are respectively and rotationally arranged at two ends of a slurry tank; each filter disc is in an annular disc shape and is arranged around the outer circumferential surface of the rotating device; the vacuum system is provided with at least one filtrate pipe group; each filtrate pipe group comprises a plurality of filtrate pipes; each filtrate pipe at least comprises a filtrate pipe section which is located outside the rotating device and extends along the axis direction of the rotating device; the plurality of filtrate pipes of each filtrate pipe group are uniformly arranged in the circumferential direction of the rotating device; and each filtrate pipe section communicates with the inner cavity of a filter fan outsidethe filtrate pipe section. The filtrate pipes are arranged outside the rotating device, so that maintenance is convenient, the space between the rotating device and the filter discs is fully utilized,the wall thickness of the filtrate pipes can be increased, and the service life of the filtrate pipes can be prolonged. The inner diameter of the filtrate pipes can also be increased, the overflowingarea is increased, and filtrate discharge efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of flue gas wet desulfurization gypsum dehydration, in particular to a filter cloth type disc dehydrator. Background technique [0002] Existing power plant flue gas due to sulfur SO 2 It must be removed by a desulfurization device before it is discharged. Flue gas desulfurization generally adopts limestone-gypsum wet flue gas desulfurization (FGD) system. At present, most of the domestic and even the world's thermal power plants that use the limestone-gypsum process desulfurization system use vacuum belt dehydrators to separate the solids and liquids of their tail products. This vacuum belt dehydrator has the advantages of mature technology, reliable performance and simple operation in this industry. But on the other hand, this vacuum belt dehydrator has the disadvantages of large floor space, high investment, high energy consumption, high filtrate concentration and high maintenance cost. Contents of t...

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Problems solved by technology

[0003] The present invention aims to overcome at least one defect of the existing flue gas desulfurization system, and provides a filter cloth type disc dehydrator, which can use the vertical surface as the filter surface, has a large filter area and a small volume, and solves the problem of the traditional vacuum belt. The dehydrator occupies a large area and has the disadvantages of high energy consumption; in particular, the filtrate tube of the filter cloth disc dehydrator of the present invention is easy to maintain, the fluid flow rate has little wear on the tube wall, and the service life is long, thereby improving the filter cloth disc dehydrator. The service life of the disc dehydrator; and the quality of the gypsum slurry is not high, and the cost is low

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