Slurry pumping apparatus for solid-liquid separation

• US 4,604,037 A
• Filed: 12/17/1984
• Issued: 08/05/1986
• Est. Priority Date: 09/21/1984
• Status: Expired due to Fees

• Current Assignee: Takesi Hoya
• Original Assignee: Takesi Hoya
• Inventors: Hoya, Takesi
• Primary Examiner(s): Smith, Leonard E.
• Application Number:
  US06/682,333
• Time in Patent Office: 596 Days
• Field of Search: 417/394, 417/395, 417/390
• US Class Current: 417/394
• CPC Class Codes: B01D 25/302 specially adapted for chamber filter presses
• CPC Class Codes: F04B 15/02 the fluids being viscous or non-homogeneous

Abstract

The present invention relates to a slurry pumping apparatus for solid-liquid separation. More specifically, the invention provides, in a slurry pumping apparatus arranged such that a diaphragm pump connected to an oil tank is actuated to deliver a hydraulic oil when a predetermined amount of slurry is supplied from a slurry tank to a solid-fluid separator, such as a filter press, which obtains cake from slurry, a slurry pumping apparatus for solid-liquid separation in which the diaphragm pump has its hydraulic pressure chamber connected to a supply/discharge pump through a changeover operation of a change-over valve such that the slurry is pumped to the solid-liquid separator by the operation of the diaphragm pump.

Claims

1. In a slurry pumping apparatus including a hydraulic pressure source, and a diaphragm pump, interposed between a solid-liquid separator and a slurry tank, and connected to an oil tank, the diaphragm pump having a hydraulic pressure chamber connected to a supply/discharge pump through changeover valve means, the improvement comprising:

said supply/discharge pump comprising a fluid supply pump and a fluid discharge pump which are mechanically connected together such as to be operable as one unit, said fluid discharge pump having its suction/discharge chamber connected through a suction/discharge passage to a first changeover valve communicating with said oil tank and the hydraulic pressure chamber of said diaphragm pump, said fluid supply pump having a first pressurizing chamber connected to said oil tank through a second changeover valve, and a second pressurizing chamber connected to said oil tank and to the hydraulic pressure chamber of said diaphragm pump.

2. The improvement according to claim 1, wherein said fluid discharge pump and said fluid supply pump are connected in series.

3. The improvement according to claim 1, wherein said fluid discharge pump and said fluid supply pump are connected in parallel.

4. In a slurry pumping apparatus including a hydraulic pressure source, and a diaphragm pump, interposed between a solid-liquid separator and a slurry tank, and connected to an oil tank, said diaphragm pump having a hydraulic pressure chamber connected to a supply/discharge pump through changeover valve means, a slurry pumping apparatus for solid-liquid separation comprising:

said supply/discharge pump being composed of a fluid supply pump and a fluid discharge pump which are mechanically connected together such as to be operable as one unit, said fluid discharge pump having its suction/discharge chamber connected through a suction/discharge passage to a first changeover valve communicating with said oil tank and the hydraulic pressure chamber of said diaphragm pump, said fluid supply pump having a first pressurizing chamber connected to said oil tank through a second changeover valve, and a second pressurizing chamber connected to said oil tank and to the hydraulic pressure chamber of said diaphragm pump, and the hydraulic pressure chamber of said diaphragm pump being provided therein with a support net for a diaphragm.

5. A slurry pumping apparatus for solid-liquid separation according to claim 4, wherein said support net is adapted to advance and retract in the axial direction.

6. A slurry pumping apparatus for solid-liquid separation according to claim 5, wherein said support net is engaged at its proximal portion thereof with said diaphragm.

7. A slurry pumping apparatus for solid-liquid separation according to claim 5, wherein said support net is attached to a sleeve which slides on a guide secured to a casing.