CS269273B1 - Filter candle - Google Patents

Abstract

The filter candle for cleaning liquids consists of a supporting armature, fiber layers, a grid and side walls. On the supporting armature there is at least one layer of chemical or mineral fibers with a fineness of 0.9 to 4.4 dtex, on which a layer of chemical or mineral microfibers and/or submicrofibers is applied, on which there is then at least one layer of chemical or mineral fibers with a fineness of 1.7 to 22 dtex, provided with a layer of microfibers and/or submicrofibers. On this layer there may then be further layers. The last of them is covered with a protective grid. This is firmly fixed on the sides by means of binders to the side walls, which simultaneously form a clamping armature.

Description

The invention relates to a filter candle, intended in particular for depth filtration of liquid media from mechanical particles with a size above 0.5 µm.

Currently known filter candle designs are designed for filtration of liquid media to capture particles larger than 10 µm, 5 µm and 0.5 µm. To achieve the required purity, these filters are arranged in tandem one after the other and the liquid medium is gradually cleaned of mechanical particles by flowing through these filters.

A disadvantage of known solutions is the complex construction of the filter device.

The aim of the invention is to eliminate the shortcomings of known solutions and create a new filter design that would allow liquids to be cleaned to the required quality with a single filter.

The above-mentioned shortcomings are eliminated by the filter candle for depth filtration of liquid media according to the invention, consisting of a supporting armature, fiber layers, a protective grid and sidewalls. On the supporting armature there is at least one filter layer of chemical or mineral fibers, for example from polyester, polypropylene, viscose, polyamide, polyacrylonitrile, glass, asbestos or sulfated pulp fibers, with a fineness of 0.9 to 4.4 dtex. On it is applied a layer of microfibers and/or submicrofibers, for example from polyamide, polyester, polypropylene, polyvinyl chloride or mineral fibers. On the described formation there is at least one filter layer of chemical or mineral fibers with a fineness of 1.7 to 22 dtex, provided with a layer of microfibers and/or submicrofibers. On this layer, there may then be further filter layers with a layer of microfibers and/or submicrofibers, or without this layer, while the last outer filter layer is provided with a protective grid, for example made of polyethylene, which is firmly fixed on the sides by means of binders to the sidewalls, which simultaneously form a clamping armature.

The advantage of the filter candle for cleaning liquid media according to the invention is its gradual clogging with particles, which are deposited gradually according to size in the full cross-section of the filter. The filter thus formed has a high capacity for capturing mechanical particles.

Specific examples of implementation:

Example 1

The filter candle is made of a polypropylene support perforated armature, on which a layer of three windings of polyester fabric with a fiber fineness of 1.7 -2 -2 dtex and a surface weight of 80 g.m is formed, with a layer of 30 g.m of polyvinyl chloride fibers with a fineness of 0.5 to 1.0 ^um. On this layer, a third layer of three windings of polypropylene non-woven fabric made of fibers with a fineness of 1.7 and 4.4 dtex and a surface weight of 400 g.m is formed, which is set on one side. A polyethylene grid in the shape of a tube with dimensions 153/30 is stretched on this layer. The sides of the filter candle are glued in the sidewalls using epoxy resin.

Example 2

The filter candle is made of a polypropylene support perforated armature, on which is formed a layer of two windings of filter material, containing sulphated pulp and polyester, glass and asbestos fibers, with a basis weight of 300 o to 450 g.m . This filter material is produced by papermaking technology. On this layer there is another layer, made of three windings of polyester non-woven fabric -2 ' -2 with a fiber fineness of 1.7 dtex and a basis weight of 80 g.m with a layer of 30 g.m polyvinyl chloride fibers with a fineness of 0.5 to 1.0 /Um.

On this layer, a third layer is created from three layers of non-woven fabric, made from a mixture of polypropylene and viscose fibers with a fineness of 11 and 22 dtex with an area of

CS 269273 Bl _ 2 weighing 480 g.m. This textile is provided with a layer of polyvinyl chloride fibers _o in an amount of 15 g.m. .

A polyethylene grid in the shape of a tube weighing 200 g is stretched over the last layer. The sides of the filter candle are sealed with synthetic rubber.

Claims (1)

SUBJECT OF THE INVENTION Filter candle, intended in particular for depth filtration of liquid media, consisting of a support armature, fiber layers, protective grid and sidewalls, characterized in that the support armature has at least one filter layer made of chemical or mineral fibers, for example polyester, polypropylene, viscose, polyamide, polyacrylonitrile, glass, asbestos or sulfated pulp fibers, with a fineness of 0.9 to 4.4 dtex, on which is applied a layer of microfibers and/or submicrofibers, for example polyamide, polyester, polypropylene, polyvinyl chloride or mineral fibers, on which is at least one filter layer made of chemical or mineral fibers with a fineness of 1.7 to 22 dtex, provided with a layer of microfibers and/or submicrofibers, on this layer there may then be further filter layers and a layer of microfibers and/or submicrofibers, or without this coating, the last outer filter layer being provided with a protective grid, for example made of polyethylene, which is firmly fixed on the sides by means of binders to the sidewalls, which simultaneously form a clamping armature.