Thermally stabilized bag house filters and media

一种袋式过滤器、滤袋的技术，应用在复合材料领域，能够解决缩短过滤介质使用寿命、基重受限、降低过滤器继续使用的能力等问题

Inactive Publication Date: 2010-10-06
CUMMINS FILTRATION IP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The layer comprises polymeric fine fibers with a diameter of about 0.01 to about 0.5 microns, but the basis weight is limited due to manufacturing method constraints
The limitation of layer basis weight in the '142 patent can significantly reduce the life of the filter media and greatly reduce the ability of the filter to continue to be used after cleaning cycles

Method used

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  • Thermally stabilized bag house filters and media
  • Thermally stabilized bag house filters and media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 5

[0054] To test the thermal stability of nanofibrous webs, nanofibrous webs with a basis weight of 15 grams per square meter (gsm) were prepared using polyamide PA6 / 6 (Zytel 3218, DuPont , Wilmington, DE) nanofibers spun. The average fiber diameter is about 400 nm. Small samples (20cm x 25cm) were suspended in a forced circulation oven at 140°C. Samples are removed daily, checked for color and shrinkage, and tested for tensile strength and elongation. Table 1 lists the samples and the content of antioxidants used and the color after aging at 140 °C for 21 days. Antioxidants used were N,N'-hexamethylenebis(3,5-di-tert-butyl-4-hydroxyphenylpropanamide (Irganox 1098, Ciba, Tarrytown, NY) or copper bromide (PolyAD 1932, supplier).

[0055] Shrinkage was determined by measuring the length of one side of the sample, expressed as a percentage of the original sample length.

[0056] Table 1

[0057] sample

[0058] Antioxidant-containing samples exhibited greater resi...

Embodiment 6 to 10

[0066] Five different nanofibrous webs were prepared with a basis weight of about 10 gsm containing 0.75%, 1%, 2% Irganox 1098, 0.2% PolyAd 1932 and no antioxidant. The average diameter is about 400 nm. The nanofibrous web was bonded to a basis weight of 14 oz / yd using the following adhesive lamination method: 2 on the polyester felt samples.

[0067] A discrete layer of polyurethane adhesive was applied to one surface of the felt using a gravure roller. The mat and nanoweb are fed into the nip of two rolls, the mat surface coated with adhesive contacts the nanoweb. The roll temperature was 144°C, the nip pressure was 40 pounds per square inch (psi), and the line speed was 3 meters per minute. The composite is rolled up and tested. A control sample without antioxidant was laminated on a commercial machine. The nip roll temperature was 290°F and the line speed was 3 meters per minute.

[0068] All samples and controls were tested by placing them in an oven at 150°C for 70...

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Abstract

A bag filter having a support structure clothed in a filter bag. The cloth of the filter bag is a composite of at least one substrate layer and at least one nanoweb bonded thereto in a face-to-face relationship. The nanoweb is positioned at the surface of the filter bag first exposed to the hot particle laden gas stream and can have a basis weight of greater than about 0.1 gsm.

Description

field of invention [0001] The present invention relates to filters for filtering solids from fluid streams, such as industrial gas streams, and composite materials useful as such filters. Background of the invention [0002] Dust collectors, also known as bag filters, are generally used to filter particulate matter from industrial effluents or exhaust air. After filtering, the purified exhaust gas can be released into the atmosphere or recycled. Such baghouse constructions typically include one or more flexible filter packs supported within a cell or similar structure. In such filter cells and banks, filter bags are typically secured within the cell and held in place so that effluent can efficiently pass through the filter bags, thereby removing entrained particles. Filter bags secured within the cell are typically supported by a structure that separates upstream and downstream air and supports the filter bags for efficient operation. [0003] More specifically, in so-cal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B01D46/54D04H1/42D04H1/4334D04H1/46D04H1/498
CPCB01D46/02B01D2275/10B01D39/1623B01D2239/025B01D46/546B01D39/16B01D46/54
Inventor A·科利A·谢林K·H·维斯B·L·怀斯曼Y·H·金H·苏
Owner CUMMINS FILTRATION IP INC
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