Filter media

A filter medium and filter technology, which is applied in the fields of filtration and separation, adsorption water/sewage treatment, chemical instruments and methods, etc., and can solve problems such as inability to guarantee
CN1933890AInactive Publication Date: 2007-03-21UNILEVER NV
3 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNILEVER NV
Publication Date
2007-03-21
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention concerns carbon block filter media for use in gravity fed filters comprising powder activated carbon (PAC) having a particle size distribution such that 95 wt% of the particles pass through 50 mesh and not more than 13 % passes through 200 mesh, and a binder material having a Melt Flow Rate (MFR) of less than 5 g / 10 min. The invention also provides water filters and a process for the preparation of a carbon block filter medium. The invention finally provides a process for the purification of water whereby the water under the influence of gravity is passed first through a washable or replaceable sediment filter for removing fine dust and other particulates above 3 m and thereafter through a carbon block filter medium comprising PAC and binder material.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to carbon block filter media for use in gravity-fed filtration units for filtering particulate contaminants from liquids, including microorganisms such as cysts, bacteria and viruses, and for removing chemical contaminants while maintaining a high flow rate. Background technique

[0002] Fluids such as liquids or gases often contain contaminants including particulate matter, chemicals and biological organisms. In liquids, such as water, especially drinking water, it is desirable to remove harmful contaminants prior to consumption in order to maintain thorough hygiene and safety conditions for the maintenance of good health.

[0003] Several different methods are known for filtering water, and various devices and devices have been devised and are commercially available. These methods and apparatus vary according to whether they are for industrial or domestic use.

[0004] Water treatment for domestic use is basically aim...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More