Nitrogen generation system helps Rockwood
A
Parker Hannifin - Parker Sales UK product story
Edited by the Engineeringtalk editorial team
Aug 1, 2006
Parker nitrogen generation system helps Rockwood Electronic Materials cut operating costs
Rockwood Electronic Materials, a leading manufacturer of ultra-high purity chemicals for the semiconductor industry, is using Parker Hannifin's innovative NitroSource nitrogen generation system to produce a consistent and controllable supply of nitrogen on-site.
The nitrogen supply is used as part of a transfer mechanism for dispensing hazardous chemicals from road tankers to storage vessels and then to provide an inert blanket in various chemical storage tanks.
Perhaps most importantly, the use of the NitroSource system has enabled Rockwood to reduce tank dispensing times, cut its operating costs and minimise its dependence on bulk gas supplies.
Based in Alfreton, Derbyshire, Rockwood Electronic Materials is a leader in the purification, processing and distribution of ultra pure speciality chemicals to the microelectronics industry, with customers including wafer fabricators, mask makers, LCD and pharmaceutical manufacturers.
As well as processing standard products such as acetic acid, hydrochloric acid, sulphuric acid and nitric acid.
Rockwood also produces a range of speciality chemicals including aluminium etchants, positive resist developers and polysilicon etchants.
Nitrogen is a crucial component in Rockwood's safety and process systems and, until recently, the company was purchasing considerable volumes of liquid nitrogen each month from a bulk gas supplier.
Phil Eyre, Engineering Manager at Rockwood, explains: "Although the gas supplied was of a high quality, there was always the potential for a disruption in deliveries".
"Of greater importance is the fact that we are under increasing pressure to reduce our operating costs without affecting the standard of service or range of products that we provide to our customers".
By installing an on-site generation system, Rockwood has been able to take control of the supply, quality and cost of the nitrogen required for its various production processes.
As Phil Eyre points out: "Using the NitroSource system means that we can choose when and how we generate nitrogen without affecting the quality of the gas".
"In addition, the system has helped us reduce our gas operating costs, with payback on the unit being achieved within 12 months".
The NitroSource generation system uses Parker's unique hollow fibre membrane technology to separate oxygen, nitrogen and other trace gases from a compressed air stream.
The Parker membranes are up to 100 times more permeable than competing devices, which enables the pressure and feed temperature of the compressed air stream to be lowered to 6bar at 20C, thereby minimising energy consumption, reducing capital cost, and extending operating life.
The NitroSource system is supplied as a compact, fully integrated unit, complete with oxygen sensor, flow meter and all connections.
The NitroSource capacity to produce nitrogen can easily be extended by the addition of extra membrane modules.
Phil Eyre comments: "We were able to start using the system almost from day one, while the facility to expand the output capacity means that we can easily increase our production volumes as the needs of the business change".
"A further important benefit of NitroSource is that the unit has a small footprint and requires minimal maintenance; similarly, the in-built digital data management feature enables us easily to monitor, store and communicate parameters such as pressure, flow and residual oxygen concentration to our overall process control systems".
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