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US 4,039,450 AGranted
Continuous tubular filter and method of using the same
OwnerJudson G. Browninventor
Life of this patent
Estimating the term…
Abstract
A filter belt is formed into a tube which follows a substantially U-shaped path. Feed is introduced into the tube and by hydrostatic pressure is filtered. The tube is opened and the cake removed and the tube reformed.
Claims14
A method for filtration by hydrostatic pressure and gravity which includes:
- a. forming a filter belt into an integral tube by sealing continuously the edges of the belt;
- b. moving the tube along a substantially U-shaped path, the path comprising a feed side, a bottom portion, and a discharge side;
- c. introducing a feed stream into the tube;
- d. increasing the hydrostatic pressure in the feed side from the upper to the lower portion of the feed side;
- e. forming a cake on the inner walls of the tube and causing said cake formation substantially solely by the hydrostatic pressure;
- f. forming a liquid core within the cake, and extending said liquid core along the length of the feed side;
- g. opening the tube downstream of the discharge end to form the belt;
- and
- h. removing the cake formed.
6 more elements
A filter apparatus which comprises:
- a. a filter belt;
- b. means to form the belt into an integral tubular filter;
- c. means to suspend the tube such that it forms a substantially U-shaped configuration, the tube including a substantially vertical feed side, a bottom portion, and a discharge side;
- d. means to introduce a feed stream into the feed side of the tube and to fill the feed side of the tube with the feed stream;
- e. means to control the belt speed to form a cake on the inner walls of the tube and a liquid core within the cake;
- f. means to open the tube disposed downstream of the discharge side to convert the tube back into the filter belt;
- g. means to remove cake formed in the tube and remaining on the belt, said means spaced apart from the means to open the tube;
- and,
- h. means to move the belt along the U-shaped configuration.
6 more elements
Dependencies are inferred from the claim text.