CHEMICALS & PHARMACEUTICALS HANDLING TiO2 SAFELY
STAND-ALONE CIP SYSTEM
Maintaining hygienic, and in some cases sterile, production equipment is a key aspect in the production of pharmaceuticals and in other processing industries such as food manufacture. Cleaning-in- Place (CIP) is the standard technique to effectively and efficiently clean equipment which contains pipework, enclosed spaces and small apertures in situ. HRS Heat Exchangers offers
cleaning-in-place (CIP) and sterilisation-in- place (SIP) systems for cleaning and disinfection for all
hygienic industries, including food and pharmacy industry systems. The single- and multi- tank HRS CIP/ SIP Systems are supplied complete with a control system to enable automated cleaning cycles. The systems are fully skid
mounted and have modular designs for quick and easy site installation. The single-tank (ST) system is designed for simple cleaning applications where recovery of the cleaning fluid is not required, while multi-tank (MT) systems are suitable for more complex situations. For small, portable
applications, the tank can be heated to 85°C using electric heating elements, but steam heating using an HRS K Series multitube heat exchanger is also available. Units start at 500l capacity, and single tank systems are available up to 2,500l. Larger systems can be provided using multiple tanks and centrifugal sanitary pumps are fitted as
standard. Systems are fully
automated using PLCs and HMIs, which can be stand-alone or integrated into the factory’s
main control system. HRS Heat Exchangers
www.hrs-
heatexchangers.com
42 JUNE 2021 | PROCESS & CONTROL
Spiroflow is taking steps to advise its customers on its range of conveying solutions that are ideally suited to the safe handling and containment of titanium dioxide (TiO2) powder. The move comes as a result of legislation changes made by the European Commission in February 2020, in classifying titanium dioxide (TiO2) as a suspected carcinogen (cat 2) by inhalation. The regulation becomes official on 1 October 2021, meaning that businesses handling TiO2will need to upgrade the containment of their processes, so that their operators are protected. Even products containing as little as 1% TiO2will need to be included. TiO2 is an inert inorganic compound that is used as a white
pigment in many industrial applications. These applications include the manufacture of paints, coatings, and wall coverings where TiO2 provide essential product properties such as whiteness, covering power, brightness, stability and durability of colour. It is also used in products such as foods, pharmaceuticals and cosmetics. Handling TiO2 in a production environment can often be problematic, particularly in conveying, where due to its cohesive properties, equipment such as screw conveyors can stall and ultimately fail. Dust and containment is also a major consideration. Spiroflow regularly provides solutions for the safe and efficient
handling of TiO2 through either their flexible screw or aero- mechanical conveyors. A flexible screw conveyor, having only one moving part - the spiral - makes it ideal for conveying TiO2. The pro- screw in the tube will move round in a spiral formation, the flat-leading edge and closer gap tolerance between the tube and the screw both help reduce the product residue and smearing in the conveying tube, thereby limiting halts in production. Spiroflow’s aero-mechanical conveyor creates an airstream
which moves the product up the tubes along with high-speed discs and a rope. TiO2 is conveyed in the air stream created by the rope and discs in the tube where the product is handled gently. This conveyor is suited to conveying TiO2 because any dust created will be all contained within the conveyor itself. This conveyor is contained, runs quietly and with minimal energy, so is suitable for conveying larger volumes of TiO2. Jeannette Carter, a regional sales manager at Spiroflow with a
NEBOSH National General Certificate in Occupational Health and Safety, said: “With many years of experience, we've trialled and developed products to ensure the smooth running of difficult cohesive materials such as titanium dioxide, resulting in us developing our flexible screw conveyor, which prevents the smearing and potential build-up of material in the conveying tube. Typically, we’d still select the aero-mechanical conveyor when presented with applications, but use the pro-screw in a steel tube as a metering device to offer a guaranteed solution. Containment in delivery, either from a bulk bag or sack tip, is a major consideration and one we handle on a daily basis.” Spiroflow
www.spiroflow.com
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