Chemical delivery and on-site blending system for producing multiple products

• US 5,823,670 A
• Filed: 09/28/1994
• Issued: 10/20/1998
• Est. Priority Date: 11/17/1993
• Status: Expired due to Term

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Calgon Carbon Corporation (Kuraray Company Limited)
• Inventors: Scruggs, Terry L., Malone, John J., Rushing, J. Mitchell
• Primary Examiner(s): SOOHOO, TONY GLEN
• Application Number:
  US08/314,393
• Time in Patent Office: 1,483 Days
• Field of Search: 366/171.1, 366/152.1, 366/154.1, 366/162.1, 366/160.1, 366/165.5, 366/173.1, 366/348, 366/152.4, 222/1, 222/132, 222/145.5, 222/145.6, 134/93, 134/94.1, 134/99.2, 137/3
• US Class Current: 366/152.1
• CPC Class Codes: B01F 23/49 Mixing systems, i.e. flow charts or diagrams
• CPC Class Codes: Y10T 137/0329 Mixing of plural fluids of diverse characteristics or conditions

Abstract

A chemical delivery and on-site blending system for producing multiple products is provided. Generally, chemical subcomponents are fed to a chemical blending system for making a multitude of products at the facility where the products are to be used. Also, a water line is connected to the system for blending with the subcomponents and for rinsing the system equipment. A microprocessor controls a series of inlet valves, a feed pump, and a mixer for formulating the products in a mixing tank. A flow meter monitored by the microprocessor measures the amounts of ingredients entering the tank. Once formulated, a product is discharged from the tank by a discharge pump also controlled by the microprocessor. Included with the system is a timed rinse cycle which rinses the tank after the product has been discharged. In one application, the chemical delivery and on-site blending system can be used to form a selected plurality of chemical cleaning products for use in cleaning and treating devices and machinery used in the manufacture of paper products.

Claims

1. An automated method of forming a plurality of preselected chemical cleaning products for use in treating machinery used to manufacture paper products, said method includes utilizing a programmable, electrical processing means having a control panel, said control panel including a plurality of product selection switches which upon activation initiates formation of a corresponding on-site chemical cleaning product, said method comprising the steps of:

supplying to a determined use site a plurality of preselected respective chemical subcomponents, said subcomponents generally being in a chemical concentrated state and including at least an alkaline solution, an acidic solution, and a detergent composition;

feeding predetermined measured amounts of certain of said subcomponents into a mixing tank upon activation of at least one of said product selection switches;

mixing said measured amounts of said subcomponents for a predetermined interval of time for forming a predetermined one of said respective chemical cleaning products;

discharging said on-site formed chemical cleaning product from said mixing tank for storage and use of said on-site chemical cleaning product to treat said machinery used in the manufacture of paper products at said site.

2. The method of claim 1, further comprising the step of feeding a predetermined measured amount of water into said mixing tank with said respective chemical subcomponents, said water coming from a water source at said site.

3. The method of claim 1, wherein quantities of on-site formed chemical cleaning products capable of being formed exceed quantities of said respective chemical subcomponents transported to said use site.

4. The method of claim 1, wherein said on-site formed chemical cleaning product is selected from the group consisting of a felt cleaner, a forming fabric cleaner, and a boil-out formulation for cleaning a headbox.

5. The method of claim 1, wherein said chemical subcomponents include a composition of polyphosphates and sodium acrylates useful in the formation of a scale control composition.

6. The method of claim 1, wherein said on-site formed chemical cleaning product is substantially free of chemical agents added solely for the purpose of acting as emulsifiers.

7. The method of claim 1, wherein at least one of said chemical subcomponents is supplied to said site in dry form.

8. The method of claim 1, wherein at least one of said chemical subcomponents is fed to said mixing tank in dry format.