Filter apparatus for continuously thickening suspensions

• US 4,511,471 A
• Filed: 06/02/1983
• Issued: 04/16/1985
• Est. Priority Date: 06/03/1982
• Status: Expired due to Term

• Current Assignee: DrM Dr. Müller AG
• Original Assignee: DrM, Dr. Mueller AG
• Inventors: Muller, Hans
• Primary Examiner(s): Castel, Benoit
• Application Number:
  US06/500,313
• Time in Patent Office: 684 Days
• Field of Search: 210/306, 210/320, 210/323.2, 210/331, 210/333.1, 210/347, 210/411, 210/333.01
• US Class Current: 210/323.2
• CPC Class Codes: B01D 2201/0484 suspended from collector tubes at the upper side of the filter elements
• CPC Class Codes: B01D 2201/46 Several filtrate discharge conduits each connected to one filter element or group of filter elements
• CPC Class Codes: B01D 29/114 arranged for inward flow filtration B01D29/15, B01D29/33 take precedence
• CPC Class Codes: B01D 29/52 in parallel connection
• CPC Class Codes: B01D 29/661 by using gas-bumps
• CPC Class Codes: B01D 29/668 with valves, e.g. rotating valves for coaxially placed filtering elements
• CPC Class Codes: B01D 29/92 for discharging filtrate

Abstract

A filter apparatus for continuously thickening a suspension is proposed. The filter apparatus consists of a housing which accommodates a plurality of filter elements depending on individual collecting pipes. The collecting pipes are located parallel to each other and are separated by intermediate walls which extend beyond the collecting pipes and the filter elements in axial direction.

Claims

1. A filter apparatus for continuously thickening suspensions, comprising:

a housing defining a chamber therein and having an axis, a filtrate chamber portion, and a slurry chamber portion;

a plurality of individual collecting pipes arranged in the chamber of the housing;

a plurality of filter elements mounted on the collecting pipes for providing filtration with formation of a filtrate, each of the filler elements having an upper edge and a lower edge;

outlet means for allowing the filtrate to be discharged and a pressure gas conduct for introducing gas through respective ones of the filter elements in counterdirection to the filtration when filtration is to be stopped for cleaning the respective filter elements, said allowing means including valves each associated with a respective collecting pipe to the outlet means and to the pressure gas conduit; and

means for separating the individual collecting pipes from each other so that the gas is prevented from acting on and damaging adjacent filter elements still filtrating, said separating means including a plurality of stationary intermediate walls each arranged between two individual collecting pipes and extending equally deeply into said filtrate chamber portion and into said slurry chamber portion of said chamber beyond the upper edge and lower edge of the filter elements.

2. A filter apparatus as defined in claim 1, wherein each intermediate wall is of sheet metal.

3. A filter apparatus as defined in claim 1, wherein the valves are three-way valves.