Chemical handling and mixing system

• US 5,240,326 A
• Filed: 12/28/1990
• Issued: 08/31/1993
• Est. Priority Date: 12/28/1990
• Status: Expired due to Fees

• Current Assignee: Mark A. Evanson
• Original Assignee: Environmental Considerations, Ltd.
• Inventors: Evanson, Mark A.
• Primary Examiner(s): Hornsby, Harvey C.
• Assistant Examiner(s): Chin, Randall E.
• Application Number:
  US07/635,268
• Time in Patent Office: 977 Days
• Field of Search: 366/139, 366/150, 366/154, 366/167, 366/173, 366/174, 366/177, 366/181, 366/182, 366/183, 366/336, 366/337, 366/340, 366/13, 366/341, 366/91, 366/96, 366/101, 366/107 , 366/165, 366/169, 366/171, 366/178, 366/204, 366/226, 366/228, 366/230, 366/231, 422/264, 422/275, 422/278, 422/269, 422/263, 422/277, 134/93, 68/17 R, 137/268, 99/306, 99/307
• US Class Current: 366/139
• CPC Class Codes: B01F 23/40 Mixing liquids with liquids; Emulsifying
• CPC Class Codes: B01F 23/49 Mixing systems, i.e. flow charts or diagrams
• CPC Class Codes: B01F 25/20 Jet mixers, i.e. mixers using high-speed fluid streams using jets to create vortex flow B01F25/10

Abstract

A chemical handling and mixing apparatus is disclosed, consisting of a chemical loading apparatus in which bulk chemical is mixed with water into an aqueous solution or slurry and an agitation apparatus which receives the aqueous solution or slurry from the chemical loading apparatus and further mixes the solution or slurry to ensure even mixing and delivers the mixed chemical to a pump for storage or use.

Claims

1. Apparatus for mixing chemicals, comprising:

a tank having an inner wall and an outer wall defining an inter-wall space therebetween and a central interior opening, said interior opening further having an upper and lower chamber defined therein, said lower chamber terminating in a fluid outlet;

fluid introduction means for introducing a fluid flow into and through said inter-wall space of said mixing tank to the top corners of and into said upper chamber, comprising a service block member operably coupled to said tank, said service block member comprising a fluid inlet, fluid outlet communicating with said fluid outlet of said tank, an annular fluid channel and at least one fluid inlet tap in fluid flow communication with said inter-wall space of said tank;

a perforate member substantially subtending and dividing said interior opening into said upper and said lower chambers;

means for agitating the chemical mixing fluid, said means being in fluid flow communication with said fluid outlet of said mixing tank and dispensing an agitated fluid therefrom; and

means for evacuating chemical vapors from said tank, comprising at least one tubular member disposed within said interwall space, passing through said inner wall of said tank and communicating with said lower chamber of said tank, and means for drawing a vacuum through said tubular member.

2. The apparatus according to claim 1, wherein said means for drawing a vacuum through said tubular member further comprises an annular vapor channel provided in said service block member, said annular vapor channel having at least one vapor tap communicating with said at least one tubular member, said annular vapor channel also communicating with said fluid outlet port of said service block member, whereby fluid passing out of said fluid outlet port creates a vacuum in said annular vapor channel.

3. An apparatus for mixing bulk materials with a fluid, comprising:

a material induction tank having an inner wall and an outer wall, fluid conduit interdisposed between said inner wall and said outer wall, a central mixing chamber, said mixing chamber being further separated into an upper and a lower chamber, said lower chamber terminating in an outlet, and flow restriction means for receiving a fluid flow from said fluid conduit, converting said fluid flow to a laminar fluid flow and directing said laminar fluid flow into said upper chamber of said tank;

a service member operably coupled to said material induction tank, said service member further comprising a fluid inlet, fluid outlet communicating with said fluid outlet of said tank, an annular fluid channel and at least one fluid inlet tap in fluid flow communication with said fluid conduit, whereby a mixing fluid is introduced into said fluid inlet, flows into and through said annular fluid channel and into and through said at least one fluid inlet tap, into said fluid conduit, through said flow restriction means and into said upper chamber of said tank;

a perforate member substantially subtending and dividing said interior opening into said upper and said lower chambers;

an agitation tank in fluid flow communication with said fluid outlet of said mixing tank; and

means for evacuating chemical vapors from said tank, comprising at least one tubular member disposed within said interwall space, passing through said inner wall of said tank and communicating with said lower chamber of said tank, and means for drawing a vacuum through said tubular member.

4. The apparatus according to claim 3, wherein said means for drawing a vacuum through said tubular member further comprises an annular vapor channel provided in said service block member, said annular vapor channel having at least one vapor tap communicating with said at least one tubular member, said annular vapor channel also communicating with said fluid outlet port of said service block member, whereby fluid passing out of said fluid outlet port creates a vacuum in said annular vapor channel.