Porous composite block, filter assembly, and method of making the same
A composite block and pore technology, applied in membrane filters, chemical instruments and methods, separation methods, etc., can solve the problems of carbon block filter fouling and other problems, and achieve the effect of improving the sediment removal ability
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[0032] In the preparation of a suitable primary structure, a polymer binder (primary polymer binder) is used to make the individual adsorptive medium particles adhere to each other. The polymer binder can be selected from known polymer materials, including, for example, polyolefins, polyesters, polyethers, polyamides, styrene polymers, cellulose polymers, acrylic polymers, and combinations thereof. Suitable polyolefins include, for example, low density polyethylene, high density polyethylene, ultra-high molecular weight polyethylene, low density polypropylene, high density polypropylene, and combinations thereof. As used herein, the term "ultra-high molecular weight polyethylene" (UHMW PE) means an index average molecular weight (Mn) of about 2×10 6 Grams per mole (g / mol) or greater polyethylene. In some embodiments, the total binder content of the porous composite block according to the present invention is generally between about 5% and about 50% by weight of the aggregate we...
example
[0065] Unless otherwise stated, all parts, percentages, ratios, etc. in the examples and the rest of this specification are by weight.
[0066] Process of preparing porous block
[0067] A weighed amount of activated carbon, binder, and other components (such as lead reduction medium, pore-forming material) are put into a 5 gallon (22L) bucket. Mix the contents of the bucket by rapidly stirring at a rate of about 600 rpm for about 3 minutes. The resultant mixture was filled into a mold (aluminum tube with top and bottom plates and a mandrel), and the mold was fixed to a filling table. The mold is filled while discontinuous vertical displacement of the worktable is made, for example, using a pneumatic percussion device or a hammer. Approximately every two seconds to apply a vertical displacement (or pulse) to the table for about three minutes, or until the material in the mold is completely compacted. The mold is then heated in a convection oven. The heating time depends on the...
example 1
[0092] Use the crushing mixture prepared above to prepare porous composite blocks according to the following recipe:
[0093]
[0094] The porous composite block was molded into a 3.5 inch (8.9 cm) outer diameter x 0.75 inch (1.9 cm) inner diameter. Approximately 90 pounds of force (400N) of compression is applied before heating. The porous composite block was cured at 177°C. After heating and during cooling, a compression of 90 pounds (400N) is applied.
[0095] Test the sediment life of the above block and the chlorine reduction efficiency and capacity.
[0096] Evaluate the life of the sediment through the life gram test. The influent water will be doped with A4 fine test dust. The lifetime grams are reported as the grams of dust passing through the porous composite block until the pressure drop rises to 35 psi (0.24 MPa) above the initial pressure drop. The life span of this block is 1928 grams and the test lasts for 43,800 gallons (166kL). The average reduction in turbidity...
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