DE863934C - Stripping device for uninterrupted filtration - Google Patents

Description

For the continuous separation of mixtures of solid substances and Liquids are usually the solid substance of devices with a movable Part of large dimensions, e.g. B. a drum against a small scraper, while the liquid is aspirated at the same time.

Such devices are rational in terms of operating costs and maintenance, if the solid good is the valuable part of the mix and the extracted fluid is less valuable or worthless.

If, on the other hand, the solid material is of minor importance or worthless and the extracted Liquid the valuable part of the mix, then the use of the usual Facilities no longer beneficial because large amounts of waste matter on heavy Device parts are moved. Furthermore, the result will be even worse in this case, when the solid matter on such facilities is continuously washed out must in order to obtain the valuable liquid as completely as possible. Is the physical The nature of the solids in terms of filtration technology through graininess, sliminess etc. particularly unfavorable, then the usual devices are satisfactory in all cases not.

In such cases one can use the novel; Facility to work economically and trouble-free if the worthless or inferior Solid material is sucked off on a stationary filter surface, while the scraper is movable is. This can only prove itself for such operations if through its application the cake formation and the cake structure during the filtration are neither disturbed nor harmed.

A movable wiper has been found to overcome these disadvantages does not show and the usual filtration funnels in continuously operating devices transformed. It consists of a running back and forth in the guide, especially furnished support part on which a scraper can be loosely rotated at a certain angle lies. During the forward movement, the scraper picks up the extracted and / or washed Solid material with, while fresh mixture immediately behind the moving scraper flows in.

Before returning to its starting position, the one on a Shaft rotatably mounted scraper by a stop from its scraping position lifted and smoothed due to its own weight or additional, more suitable Stroking weights by resting it loosely while moving backwards Surface of the mixture that has flowed in. As a result, the mixture is neither am Flow prevented, nor can a push back during forward movement the filter material that has flowed back into the scraper. At the end of the backward movement is now by stop in the opposite sense and by appropriate locking the scraper making the scraper pressed into the filter material, which has meanwhile been extracted, so that the game described can repeat itself.

Such a device is made with reference to the drawing such as is described as follows: A carrier plate 4 can be rotated around the shaft I on a sleeve 2 attached, the rotatability of the support plate is limited by the catch 3 downwards. The carrier plate can therefore only be moved upwards at a certain angle of rotation. The actual scraper knife 5 lies on the carrier plate; this can be set that way that it strips off the filter cake entirely or leaves any layer standing. At the end of the forward gear, the scraper hits the stop 8, whereby the whole device is lifted off. When reversing, it smooths through its own weight loosely attached scrapers remove the surface of the filter material. At the end of this movement the scraper pushes against the stop 7, thereby in the scraping position get. The forward and backward movement takes place in the guide 6.

Claims (1)

PATENT CLAIM: Movable scraper for uninterrupted filtration, characterized in that a downwardly limited by a notch around a shaft Rotatable scraper in one guide can be moved forwards and backwards and through two stops attached to the reversal points can be raised and lowered, the position of the scraper and its movement are positively controlled.