Water-on-water filtration system with precision metering device

A filtration system, water-to-water technology, applied in water/sewage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc. variable reduction effect

Inactive Publication Date: 2012-09-12
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, filtered water does not always

Method used

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  • Water-on-water filtration system with precision metering device
  • Water-on-water filtration system with precision metering device
  • Water-on-water filtration system with precision metering device

Examples

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[0030] In the following description, reference is made to the drawings constituting a part of this specification. Several specific embodiments are shown diagrammatically in the drawings. It should be understood that other embodiments can be envisaged and implemented without departing from the scope or spirit of the present invention. Therefore, the following specific embodiments should not be construed as restrictive.

[0031] Unless otherwise specified, all numbers expressing feature sizes, quantities, and physical properties used in the specification and claims should be understood as being modified by the term "about" in all cases. Therefore, unless there are instructions to the contrary, the numerical parameters shown in the above specification and the appended claims are approximate values, which can be based on the required characteristics that those skilled in the art try to obtain by using the teachings disclosed in this application. The difference. The numerical range...

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Abstract

A water-on-water filtration system is provided that includes a filter member ( 480 ), two water-on-water vessels, and a precision metering device. Each water-on-water vessel also includes a first and a second chamber as well as a first piston ( 412) defining a mixing portion and a driving portion of the first chamber and a second piston ( 422) defining a concentrate portion of the second chamber. The system includes a plurality of valves that are controlled to place the first vessel in a fill state in which the first vessel is being filled with filtered water and concentrate, and a service state in which the diluted concentrate is pushed through a product conduit to its end use. A method of delivering filtered water is also provided.

Description

technical field [0001] The present invention generally relates to filtration systems and mechanisms into which precise amounts of additives can be added. Background technique [0002] Water filtration systems designed for residential and commercial use have become increasingly popular. This popularity has been driven by the need to remove harmful substances from input water to make output water safer for consumption in a variety of end uses. [0003] Two commonly used water filtration systems include those that drain product water into a closed pressure vessel against back pressure created by an air cell inside the vessel (air-to-water systems) and those that drain product water into a closed pressure vessel without back pressure. A system (water-on-water system) of a pressure vessel and a flexible water unit that can be compressed by a single water source and move product water out of the vessel. [0004] Air-to-water systems are subject to back pressure from the air unit...

Claims

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Application Information

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IPC IPC(8): B01D61/10B01F15/04
CPCB01D61/10B01D2311/06B01D2313/18C02F1/44C02F1/441C02F1/442C02F1/444C02F1/686C02F2103/02B01D2311/12
Inventor 安德鲁·M·坎德罗拉罗伯特·E·阿瑟尔劳伦斯·W·巴赛特
Owner 3M INNOVATIVE PROPERTIES CO
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