Discharge control device and method for a disc filter

Abstract

The invention relates to the technical field of discharging control of filters and discloses a discharging control device and method for a disk filter. The device adopted in the method comprises signal transmitters, a signal receiver, a control processor, an executing mechanism, an air blowing system and a vacuum system. The signal transmitting end of the control processor is connected with the signal transmitters evenly distributed on sector plates on the circumference of a main shaft of the disk filter, the signal receiving end of the control processor is connected with the signal receiver corresponding to the sector plates on the circumference of the main shaft of the disc filter, and the output end of the control processor is connected with the air blowing system and vacuum system through the executing mechanism. By means of the discharging control device and method for the disk filter, the filter can be always in a filter stage with a protection layer in the working process and can be started in due time to blow air for discharging, the influence on the quality of filter liquor is reduced, the problem of capacity drop caused by compactness of filter cakes in the discharging process of scrapers is solved, abrasion to filter cloth is relieved, running energy loss is reduced, and the service life is prolonged. Besides, the filter is capable of running automatically, free of maintenance and stable in running.

Description

technical field [0001] The invention relates to the technical field of disc filter unloading control, in particular to a disc filter unloading control device and method. Background technique [0002] Vacuum disc filters are used in various industries such as aluminum hydroxide seed filtration, flotation concentrates in the coal industry, treatment of tailings red mud, and dehydration of gypsum slurry in power plants. [0003] The traditional disc filter unloading method is continuous blowing unloading and scraper unloading. The continuous blowing and unloading will cause great damage to the filter cloth during operation, which reduces the service life of the filter cloth; at the same time, every time it is rotated, the adsorption is a brand new filter cake. Although the production capacity is large, the filtrate has a high solid content and is relatively turbid. . When the continuous scraper discharge is running, the filter cake adsorbed on the surface of the filter plate ...

AI Technical Summary

Problems solved by technology

However, the protective layer will become denser and denser as the running time increases, the air permeability will become poorer, and the production capacity will also decrease accordingly, which will have a great impact on the processing capacity.

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