- Email: [email protected]
Fact — a new product line from TTL
NTDEVELOPMENTS INFILT Rigid ceramic
and metal filter elements
It is clear that high-efficiency, long-lasting, rigid, inert filter elements are invaluable to advancements in particulate control technology operating over an extended temperature range. CeraNova and Specific Surface Corporations use a novel powder process to produce ceramic and metal components with controlled porosity and intricate internal channels; CeraNova is developing the process, while Specific Surface is preparing to manufacture filter elements with the process. The process is well suited to the manufacture of efficient ceramic filters for high-temperature and corrosive particulate separations. Compared with other methods, the company’s ‘Three-Dimensional Printing’ (3DPTM) process is claimed to produce filter elements that overcome obstacles which trouble today’s ceramic and metal filters. Three-Dimensional Printing is believed to exhibit several advantages over current filter production processes, such as: 0 Production of filter elements with high shock resistance and long service lives. 0 Production of complex-design, monolithic configurations such as high unit surface-area and taperedchannel crossflow designs for effective filtering in relatively small packages, avoiding problems found with coated and large filter elements. 0 The acceptance of a wide range of powdered materials for high process versatility, which allows application-
Porous
‘shut off’ material
Porvair Technology has announced the introduction of a new product, Vyon SO, a reusable porous material that completely ‘shut off on contact with moisture or water. Vyon SO has applications in air filtration, venting and vacuum conveying of liquids. It is a synergistic blend of polyethylene and co-polymer. When dry, it acts as a filter or vent with a pore size of 2-3 pm. On contact with moisture or water the pores seal instantaneously, acting as a non-mechanical valve and completely blocking the fluid flow. On drying, Vyon SO reverts to its original state, again acting as an air filter or vent. Vyon SO products can be supplied in tubes, discs, sheet or as customised mouldings. Vyon SO has already attracted 860
specific material selection and functionally graded microstructures with pore size, shape and connectivity control and uniform toughening phases. 0 The capability to maintain a high degree of uniformity, through using computercontrolled processing. 0 It has high process efficiency and scaleability, in order to economically address production concerns for a multitude of applications. 3DP rigid filter elements are intended to be attractive to commercial, utility and govern ment filtration requirements. Hot gas combustion systems which produce airborne partculates will benefit directly from filter elements produced by this process. Potential advantages exist in fossil fuel-fired generators, thermal processing of hazardous or nuclear waste, and waste incineration systems. Furthermore, the filtration of corrosive effluents and particulates from exhaust and liquids created in the chemical and heavy manufacturing industries will be facilitated by complex-designed, efficient ceramic filter elements. Because of the great commercial potential of high-temperature and corrosion-resistant ceramic filter eleSpecific Surface ments, Corporation is advancing its 3DP ceramic and metal filter elements into full-scale production Spetific Suvface Corporation, 14 Me@ Way, Hopedale, MA 01747, USA. Tellfazt f I 508 473 3200.
from Porvair considerable interest for medical applications including pipette tips for medical diagnostics - for example DNA testing where consistent and accurate volumetric analysis of fluids is critical. In addition, Porvair are working on opportunities for Vyon SO in the vacuum filling of containers with liquids and in venting sections of liquid pipe systems to reduce the incidence of air locks, Other fail-safe applications for Vyon SO include the protection of moisture equipment in the electrical, electronic and automotive industries or as a moisture barrier in air filters. Porvair Technology Ltd, Clywedog Road South, Wrexham Industrial Estate, Wrexham, Clwyd LL13 9X$ UK Tel: +44 1978 661144, f?ux: +44 1978 664554.
~__( Micromelt
filter medium
for cleanable
Micromelt is claimed to be a new kind of filter medium for cleanable filters, from Steinbeis Gessner GmbH. In cleanable filter elements it displays the characteristic features of PTFE membranes, and as a normal disposable filter in class EU9. Its key feature is the pressure drop, which is reduced in comparison with usual filter media by up to half. Micromelt is made using the melt-blown process. This can produce llbres with a diameter of less than 2 pm. This allows the company to produce a material with very fine fibres and a relatively high number of fine pores. This makes it an ideal filter medium for re-cleanable filters. The small diameter of the fibres and pores make for the highest possible dust retention, and the high number of pores should guarantee an extremely low pressure drop. The melt-blown process enables precise adjustment of the characteristic features of Micromelt according to the specific filtration requirements. For cleanable filter media the nonwoven is very compact, in order to guarantee the maximum filtration surface area. Disposable media, on the other hand, are normally made out of fluffy nonwovens, in order to achieve a high dust capacity. Micromelt can be produced at below 5 gsm and up to more than 200 gsm. Depending on the requirements, polyethylene, polypropylene, PBT or polycarbonate can be used as plastics. These plastics all comprise carbon, oxygen and hydrogen, and are consequently free from halogens. This ensures straightforward waste disposal even if incinerated. The pressure drop with Micromelt is just half as high compared with filter elements using conventional materials such as, for example spunbonded media using BIA Class C. This means enormous savings in the operation of a
Fact -
a new product
filters
filter unit. The service life of filter elements is thus nearly double, and the energy usage of the unit is just half The double lifetime makes the slightly higher price of Micromelt cost-effective in comparison with conventional spun-bonded equipped elements. In addition, there are savings with the lower energy costs and lower labour costs which would have otherwise been necessary for changing the filter elements, as well as consequently reducing the downtime of the unit. A filter unit which is equipped with conventional spun-bonded elements needs around 25 kW of energy per hour to filter 20,000 m3 of air. The use of Micromelt reduces the energy requirement by 45% because of the lower pressure drop. If operating for 8 hours per day and on a current price of DM0.28 per kWh, this translates into a yearly saving of around 22,500 kWh or DM6300. Compared with 30 filter elements made out of spun-bonded media with a service life of around a year, Micromelt would save enough to buy a complete filter set after a year. This is because elements made from Micromelt have a doubled service life. Furthermore, the costs of disposal and downtime of the unit, taking around half a day, occur only after the second year of operation. This means overall cost savings of around DMlO,OOO already after the first year. Because of its higher particle retention and reduced pressure drop, a Micromelt filter unit needs less iilter elements than a unit equipped with elements made from spun-bonded media. This cuts investment costs for a new filter unit by up to 20%. Steinbeis Gessnw GmbH, Postfach 1116, D-83618 FeldkirchenTel: +49 Westerham, Germany.
fax: +
8062 7030,
49 8062 7’03401.
line from TTL
Technische Textilien LBrrach has developed a new range of products, approved by BIA Q3erufsgenossenschaft Instititut fiir Arbeitsicherheit) for their very low dust emission levels. The range is called Fact. To achieve very high dust retention on the medium’s surface, ‘ITL use fine denier fibres and develop very smooth surface finishes. Beside these properties, the cleaning efficiency has been largely increased. October
These filter media are delivered respectively through dust collector makers and qualified fabricators to the endusers. Technische Textilien Ld‘rrach GmbH, Postfach 2427, D-79514 L&rach, Germany. Tel: + 49 7621402239, ,fax: + 49 7621402248.
Textiles Techniques Ld’rrach France, 13 avenue de Hollande, BP 72, F-68312 Ilkach, France. Tel: f33 8361 9219, fax: +33 8961 9225. 1995
Flltration
& Separation
and metal filter elements
It is clear that high-efficiency, long-lasting, rigid, inert filter elements are invaluable to advancements in particulate control technology operating over an extended temperature range. CeraNova and Specific Surface Corporations use a novel powder process to produce ceramic and metal components with controlled porosity and intricate internal channels; CeraNova is developing the process, while Specific Surface is preparing to manufacture filter elements with the process. The process is well suited to the manufacture of efficient ceramic filters for high-temperature and corrosive particulate separations. Compared with other methods, the company’s ‘Three-Dimensional Printing’ (3DPTM) process is claimed to produce filter elements that overcome obstacles which trouble today’s ceramic and metal filters. Three-Dimensional Printing is believed to exhibit several advantages over current filter production processes, such as: 0 Production of filter elements with high shock resistance and long service lives. 0 Production of complex-design, monolithic configurations such as high unit surface-area and taperedchannel crossflow designs for effective filtering in relatively small packages, avoiding problems found with coated and large filter elements. 0 The acceptance of a wide range of powdered materials for high process versatility, which allows application-
Porous
‘shut off’ material
Porvair Technology has announced the introduction of a new product, Vyon SO, a reusable porous material that completely ‘shut off on contact with moisture or water. Vyon SO has applications in air filtration, venting and vacuum conveying of liquids. It is a synergistic blend of polyethylene and co-polymer. When dry, it acts as a filter or vent with a pore size of 2-3 pm. On contact with moisture or water the pores seal instantaneously, acting as a non-mechanical valve and completely blocking the fluid flow. On drying, Vyon SO reverts to its original state, again acting as an air filter or vent. Vyon SO products can be supplied in tubes, discs, sheet or as customised mouldings. Vyon SO has already attracted 860
specific material selection and functionally graded microstructures with pore size, shape and connectivity control and uniform toughening phases. 0 The capability to maintain a high degree of uniformity, through using computercontrolled processing. 0 It has high process efficiency and scaleability, in order to economically address production concerns for a multitude of applications. 3DP rigid filter elements are intended to be attractive to commercial, utility and govern ment filtration requirements. Hot gas combustion systems which produce airborne partculates will benefit directly from filter elements produced by this process. Potential advantages exist in fossil fuel-fired generators, thermal processing of hazardous or nuclear waste, and waste incineration systems. Furthermore, the filtration of corrosive effluents and particulates from exhaust and liquids created in the chemical and heavy manufacturing industries will be facilitated by complex-designed, efficient ceramic filter elements. Because of the great commercial potential of high-temperature and corrosion-resistant ceramic filter eleSpecific Surface ments, Corporation is advancing its 3DP ceramic and metal filter elements into full-scale production Spetific Suvface Corporation, 14 Me@ Way, Hopedale, MA 01747, USA. Tellfazt f I 508 473 3200.
from Porvair considerable interest for medical applications including pipette tips for medical diagnostics - for example DNA testing where consistent and accurate volumetric analysis of fluids is critical. In addition, Porvair are working on opportunities for Vyon SO in the vacuum filling of containers with liquids and in venting sections of liquid pipe systems to reduce the incidence of air locks, Other fail-safe applications for Vyon SO include the protection of moisture equipment in the electrical, electronic and automotive industries or as a moisture barrier in air filters. Porvair Technology Ltd, Clywedog Road South, Wrexham Industrial Estate, Wrexham, Clwyd LL13 9X$ UK Tel: +44 1978 661144, f?ux: +44 1978 664554.
~__( Micromelt
filter medium
for cleanable
Micromelt is claimed to be a new kind of filter medium for cleanable filters, from Steinbeis Gessner GmbH. In cleanable filter elements it displays the characteristic features of PTFE membranes, and as a normal disposable filter in class EU9. Its key feature is the pressure drop, which is reduced in comparison with usual filter media by up to half. Micromelt is made using the melt-blown process. This can produce llbres with a diameter of less than 2 pm. This allows the company to produce a material with very fine fibres and a relatively high number of fine pores. This makes it an ideal filter medium for re-cleanable filters. The small diameter of the fibres and pores make for the highest possible dust retention, and the high number of pores should guarantee an extremely low pressure drop. The melt-blown process enables precise adjustment of the characteristic features of Micromelt according to the specific filtration requirements. For cleanable filter media the nonwoven is very compact, in order to guarantee the maximum filtration surface area. Disposable media, on the other hand, are normally made out of fluffy nonwovens, in order to achieve a high dust capacity. Micromelt can be produced at below 5 gsm and up to more than 200 gsm. Depending on the requirements, polyethylene, polypropylene, PBT or polycarbonate can be used as plastics. These plastics all comprise carbon, oxygen and hydrogen, and are consequently free from halogens. This ensures straightforward waste disposal even if incinerated. The pressure drop with Micromelt is just half as high compared with filter elements using conventional materials such as, for example spunbonded media using BIA Class C. This means enormous savings in the operation of a
Fact -
a new product
filters
filter unit. The service life of filter elements is thus nearly double, and the energy usage of the unit is just half The double lifetime makes the slightly higher price of Micromelt cost-effective in comparison with conventional spun-bonded equipped elements. In addition, there are savings with the lower energy costs and lower labour costs which would have otherwise been necessary for changing the filter elements, as well as consequently reducing the downtime of the unit. A filter unit which is equipped with conventional spun-bonded elements needs around 25 kW of energy per hour to filter 20,000 m3 of air. The use of Micromelt reduces the energy requirement by 45% because of the lower pressure drop. If operating for 8 hours per day and on a current price of DM0.28 per kWh, this translates into a yearly saving of around 22,500 kWh or DM6300. Compared with 30 filter elements made out of spun-bonded media with a service life of around a year, Micromelt would save enough to buy a complete filter set after a year. This is because elements made from Micromelt have a doubled service life. Furthermore, the costs of disposal and downtime of the unit, taking around half a day, occur only after the second year of operation. This means overall cost savings of around DMlO,OOO already after the first year. Because of its higher particle retention and reduced pressure drop, a Micromelt filter unit needs less iilter elements than a unit equipped with elements made from spun-bonded media. This cuts investment costs for a new filter unit by up to 20%. Steinbeis Gessnw GmbH, Postfach 1116, D-83618 FeldkirchenTel: +49 Westerham, Germany.
fax: +
8062 7030,
49 8062 7’03401.
line from TTL
Technische Textilien LBrrach has developed a new range of products, approved by BIA Q3erufsgenossenschaft Instititut fiir Arbeitsicherheit) for their very low dust emission levels. The range is called Fact. To achieve very high dust retention on the medium’s surface, ‘ITL use fine denier fibres and develop very smooth surface finishes. Beside these properties, the cleaning efficiency has been largely increased. October
These filter media are delivered respectively through dust collector makers and qualified fabricators to the endusers. Technische Textilien Ld‘rrach GmbH, Postfach 2427, D-79514 L&rach, Germany. Tel: + 49 7621402239, ,fax: + 49 7621402248.
Textiles Techniques Ld’rrach France, 13 avenue de Hollande, BP 72, F-68312 Ilkach, France. Tel: f33 8361 9219, fax: +33 8961 9225. 1995
Flltration
& Separation