TY - JOUR
T1 - Cleaning of thick viscoplastic surface deposits using an impinging jet
T2 - effect of process variables
AU - Tuck, Jessica
AU - Alberini, Federico
AU - Ward, Dick
AU - Gore, Bill
AU - Fryer, Peter
PY - 2019/8/20
Y1 - 2019/8/20
N2 - Impinging jets are the tool of choice for cleaning mixing vessels. Layers of product can be left behind on the sides of these vessels. A range of thicknesses in the FMCG industries can be found; thick films are especially difficult to clean. Here data is presented for cleaning thick films (2 - 8 mm) with an impinging water jet. An imaging technique using ultra violet light has been developed to measure cleaning of these thick films as a function of time. Carbopol® 940 solution has been used as a model fluid, representing typical consumer goods, and food products. Cleaning takes place in four stages. For thick film cleaning, there is a delay between impingement and the start of cleaning, in which water is trapped below the deposit to form a blister. The time for the blister to burst was found to be a function of both deposit thickness and nozzle diameter. A stage of rapid cleaning was defined and analysed, with the rate of cleaning here correlating with the flow rate. There was mixed agreement when rapid cleaning data was fitted against previously reported cleaning models for thin films.
AB - Impinging jets are the tool of choice for cleaning mixing vessels. Layers of product can be left behind on the sides of these vessels. A range of thicknesses in the FMCG industries can be found; thick films are especially difficult to clean. Here data is presented for cleaning thick films (2 - 8 mm) with an impinging water jet. An imaging technique using ultra violet light has been developed to measure cleaning of these thick films as a function of time. Carbopol® 940 solution has been used as a model fluid, representing typical consumer goods, and food products. Cleaning takes place in four stages. For thick film cleaning, there is a delay between impingement and the start of cleaning, in which water is trapped below the deposit to form a blister. The time for the blister to burst was found to be a function of both deposit thickness and nozzle diameter. A stage of rapid cleaning was defined and analysed, with the rate of cleaning here correlating with the flow rate. There was mixed agreement when rapid cleaning data was fitted against previously reported cleaning models for thin films.
UR - http://www.scopus.com/inward/record.url?scp=85071089495&partnerID=8YFLogxK
U2 - 10.1016/j.jfoodeng.2019.109699
DO - 10.1016/j.jfoodeng.2019.109699
M3 - Article
SN - 0260-8774
VL - 266
JO - Journal of Food Engineering
JF - Journal of Food Engineering
M1 - 109699
ER -