Method and apparatus for ensuring the pumpability of fluids exposed to temperatures colder than the pour point of such fluids

• US 5,884,814 A
• Filed: 06/26/1997
• Issued: 03/23/1999
• Est. Priority Date: 06/26/1997
• Status: Expired due to Term

• Current Assignee: Cargill Incorporated
• Original Assignee: Charles M. Nelson
• Inventors: Nelson, Charles M.
• Primary Examiner(s): Kashnikow, Andres
• Assistant Examiner(s): DEAL, DAVID R
• Application Number:
  US08/883,200
• Time in Patent Office: 635 Days
• Field of Search: 222/105, 222/146.5, 222/146.4, 222/146.2, 165/46, 165/169
• US Class Current: 222/146.2
• CPC Class Codes: B67D 7/80 Arrangements of heating or cooling devices for liquids to be transferred
• CPC Class Codes: F28D 1/06 with the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid

Abstract

A steel-bodied shipping container having two lockable doors, and at one of its ends has an insulation pad positioned on its floor. A heat exchanger pad having a hot water/steam hose embodied therein is positioned on top of the insulation pad, with the inlet/outlet ends of the hose positioned near a first of the ends doors. A flexible bladder positioned on top of the heat exchanger pad, is pumped full of a material. The first door is locked and the shipping container shipped. At destination, hot water or steam is pumped through the heat exchanger pad to raise the temperature of the material within the flexible bladder, after which the material is pumped out of the flexible bladder.

Claims

1. Apparatus for shipping pumpable materials to or through reduced temperature regions, comprising:

a container having at least one sidewall, a top surface and a bottom surface;

a portable heat exchanger pad positioned in near proximity to said bottom surface and within the interior of said container; and

a flexible bladder positioned immediately on top of said heat exchanger pad at least partially filled with said pumpable material, said heat exchanger pad having at least one hose having connections to at least one of the ends of said hose for allowing heated fluid to be pumped through said hose and thereby facilitating the pumping of said material from the interior of said flexible bladder.

2. The apparatus according to claim 1, wherein said container is a parallelepiped having two rectangular side walls, a rectangular top surface, a rectangular bottom surface, a first square end wall and a second square end wall, in which the first end wall has a pair of doors.

3. The apparatus according to claim 1, in which an insulation pad is positioned between the said heat exchanger pad and the said bottom surface.

4. The apparatus according to claim 3, in which the insulation pad is approximately two-inch thick isocynurate foam.

5. The apparatus according to claim 1, in which the said flexible bladder has an L-shaped hose integral with the upper surface of the said flexible bladder providing access to the interior of said bladder for pumping materials into or out of said bladder.

6. The apparatus according to claim 1, wherein said heated fluid is steam.

7. The apparatus according to claim 1, wherein said heated fluid is hot water.

8. A method of shipping a pumpable material to or through reduced temperature regions, comprising:

placing a heat exchanger pad containing a hose within the interior of a shipping container;

placing a flexible bladder on top of said heat exchanger pad within the interior of said shipping container,

pumping the pumpable material into said flexible bladder;

shipping said shipping container to a destination;

causing a heated fluid to flow through the hose of said heat exchanger pad; and

pumping the material out of said flexible bladder.

9. The method according to claim 8, including the additional step of positioning a pad of foam between the lower floor of said shipping container and the said heat exchanger pad.

10. The method according to claim 8, in which the heated fluid is steam.

11. The method according to claim 8, in which the heated fluid is hot water.