- Email: [email protected]
Automatic filter cleans up wash water at UK paper mill
casestudy
Automatic filter cleans up wash water at UK paper mill When it opened for business in the 1980s, the Shotton paper mill, in North Wales, UK, was the first domestic national manufacturer of newsprint. The plant has faced increasing competition since those days and is now owned and operated by the international UPM-Kymmene Group. A recent expansion project has increased the amount of product that the plant can handle with some 600,000 tonnes of newsprint now being processed every year. The recent plant enhancement includes the installation of a new automatic Bollfilter system to provide fine filtration, down to 100 micron, for the process wash water. he Shotton paper mill A Boll 6.18 automatic filter, supplies approximately 20% with a welded stainless steel of the national demand for casing, has been installed on newsprint in the UK, employing this wash water spray duty to almost 500 people directly at the ensure that the nozzles remain mill and a further 2,000 in free of any impediment. The supporting industries. The mill system has a 200 mm outlet originally manufactured and provides filtration down to newsprint from a pulp mix of 100 micron at a flow rate of renewable resources, including 173 m3/hr. The filter is wood chips from spruce trees integrated into the plant and recycled magazines and control system (DCS) and can newspapers. As part of the be operated locally or remotely upgrade project, this was via the main control room. changed last year and the plant The 6.18 filter has a total now uses only 100% recycled filtration area of 4368 cm2. paper, with no wood chipping It utilises stainless steel involved in the process at all. wedge wire arranged in a The conversion has enabled coarse mesh pattern as its waste paper from more than 10 active filtration component A stainless steel 6.18 automatic million homes in the UK to be and has 12 in-built filter filter from Bollfilter UK Ltd recycled into a useful product, elements as part of the overall installed at the Shotton paper mill namely newsprint. This has had a package. in North Wales, UK. The system positive impact in meeting the UK Regular backflushing selfremoves particulates from the government’s recycling targets cleans the filter elements on a spray nozzles on the wash water and saved valuable landfill space continuous basis, removing process. It provides filtration down on the crowded island of 60 contaminants without the need to 100 micron at a flow rate of million people. The conversion has 173 m3/hr. for manual cleaning. helped to maintain the Shotton Andrew Bronnert, the UPM plant’s pre-eminent position in the UK market and plant engineer at the Shotton facility, is pleased has improved the efficiency of the facility. with the performance of the Bollfilter system: “Since it was installed, the filter has operated without any problems,” he said. “It is set up to Water treatment automatically backflush in order to remove any debris and has not required any cleaning or UPM-Kymmene’s Shotton paper mill uses water from the nearby River Dee for wash water purposes maintenance.” in its production run. The wash water itself has to Contact: be free of any particulates in order to pass through Bollfilter UK Ltd the fine spray nozzles that distribute it around the Commerce Park, Whitehall Road, process. If these nozzles become blocked it causes Colchester, Essex, CO2 8HX, UK. inconvenience and downtime for the plant, Website: www.bollfilteruk.co.uk something that UPM could no longer tolerate.
T
Filtration+Separation
March 2005 13
Automatic filter cleans up wash water at UK paper mill When it opened for business in the 1980s, the Shotton paper mill, in North Wales, UK, was the first domestic national manufacturer of newsprint. The plant has faced increasing competition since those days and is now owned and operated by the international UPM-Kymmene Group. A recent expansion project has increased the amount of product that the plant can handle with some 600,000 tonnes of newsprint now being processed every year. The recent plant enhancement includes the installation of a new automatic Bollfilter system to provide fine filtration, down to 100 micron, for the process wash water. he Shotton paper mill A Boll 6.18 automatic filter, supplies approximately 20% with a welded stainless steel of the national demand for casing, has been installed on newsprint in the UK, employing this wash water spray duty to almost 500 people directly at the ensure that the nozzles remain mill and a further 2,000 in free of any impediment. The supporting industries. The mill system has a 200 mm outlet originally manufactured and provides filtration down to newsprint from a pulp mix of 100 micron at a flow rate of renewable resources, including 173 m3/hr. The filter is wood chips from spruce trees integrated into the plant and recycled magazines and control system (DCS) and can newspapers. As part of the be operated locally or remotely upgrade project, this was via the main control room. changed last year and the plant The 6.18 filter has a total now uses only 100% recycled filtration area of 4368 cm2. paper, with no wood chipping It utilises stainless steel involved in the process at all. wedge wire arranged in a The conversion has enabled coarse mesh pattern as its waste paper from more than 10 active filtration component A stainless steel 6.18 automatic million homes in the UK to be and has 12 in-built filter filter from Bollfilter UK Ltd recycled into a useful product, elements as part of the overall installed at the Shotton paper mill namely newsprint. This has had a package. in North Wales, UK. The system positive impact in meeting the UK Regular backflushing selfremoves particulates from the government’s recycling targets cleans the filter elements on a spray nozzles on the wash water and saved valuable landfill space continuous basis, removing process. It provides filtration down on the crowded island of 60 contaminants without the need to 100 micron at a flow rate of million people. The conversion has 173 m3/hr. for manual cleaning. helped to maintain the Shotton Andrew Bronnert, the UPM plant’s pre-eminent position in the UK market and plant engineer at the Shotton facility, is pleased has improved the efficiency of the facility. with the performance of the Bollfilter system: “Since it was installed, the filter has operated without any problems,” he said. “It is set up to Water treatment automatically backflush in order to remove any debris and has not required any cleaning or UPM-Kymmene’s Shotton paper mill uses water from the nearby River Dee for wash water purposes maintenance.” in its production run. The wash water itself has to Contact: be free of any particulates in order to pass through Bollfilter UK Ltd the fine spray nozzles that distribute it around the Commerce Park, Whitehall Road, process. If these nozzles become blocked it causes Colchester, Essex, CO2 8HX, UK. inconvenience and downtime for the plant, Website: www.bollfilteruk.co.uk something that UPM could no longer tolerate.
T
Filtration+Separation
March 2005 13