Yearbook 2013/2014 - ehedg

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Efficient conveying of liquids GEA Tuchenhagen offers a complete range of normal-priming and self-priming centrifugal pumps, finely tuned to the task at hand. • Reduced energy consumption • Gentle product handling • Hygienic design • Capacity range of 1 m³/h up to 210 m³/h • Optimal SIP/CIP characteristics • EHEDG approved and certified Whatever your process, GEA Tuchenhagen has a clever solution for you. GEA Tuchenhagen GmbH Am Industriepark 2 – 10, 21514 Büchen, Germany Phone +49 4155 49-0, Fax +49 4155 49-2423 sales.geatuchenhagen@gea.com www.gea.com engineering for a better world GEA Mechanical Equipment
78 Effective tank and vessel cleaning: How different systems can help meet today’s demands Rotating cleaners Rotating cleaners rotate around an axis, and they can be found as fast or slowly rotating types (Figures 3 and 4). Slowly rotating cleaners use flat or round jet nozzles to spray the cleaning solution on the tank wall. Unlike spray balls, the cleaner does not wet all inner tank surfaces at the same time, but rather, applies a concentrated liquid jet to one segment of the tank wall at a time. This means that the full impact energy of the jet can act on this particular segment and that a thicker liquid film forms on the tank wall, which, due to its higher energy, achieves better cleaning results as it runs down to the tank outlet. Without switching the supply pump on/off, this produces a pulse/pause type of operation for each segment of the tank that allows the product residues to be softened and rinsed off. This effect cannot be achieved by a spray ball. As a result, the mechanical cleaning effect of the slowly rotating cleaner is much greater than that of a spray ball. This even applies if the cleaning solution flow rate is relatively low. Under normal operating conditions the cleaning medium consumption is about 30-50% less compared to a spray ball. Figure 4. Rotating cleaner in the head of a mixing tank. Figure 3. Various types of rotating cleaners. Orbital cleaners The special characterristics of this type of cleaner are the round-jet nozzles that rotate in two planes and produce highly focused high impact jets for intensive cleaning of the inside surfaces of tanks or vessels (Figure 5). Depending on the type, the cleaners have two or four nozzles. The nozzles have an inside diameter of up to 12 mm in accordance with application requirements. The horizontal and vertical rotary movement is produced by a turbine gear unit, driven by the cleaning medium, or by a separate drive such as an electric or pneumatic motor. The continuous rotation in two planes produces a finely meshed, net-like pattern of cleaning jets on the inside wall of the tank. At the end of a full cycle, each and every point of the tank has been directly subjected to mechanical impact from a strong jet. A complete cycle typically takes between 3 and 9 minutes. In practice, orbital cleaners generally operate at pressures of 4 to 8 bar and can easily cover an effective horizontal cleaning diameter
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EHEDG Yearbook 2013/2014 European H
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European Hygienic Engineering & Des
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4 Contents EHEDG Guidelines 154 EHE
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12 EHEDG Company and Institute memb
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14 EHEDG Company and Institute memb
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18 Legal requirements for hygienic
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22 The importance of hygienic desig
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24 The importance of hygienic desig
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Page 33 and 34: 32 Particle and VOC emissions, chem
Page 45 and 46: 44 Hygienic design of floor drainag
Page 47 and 48: 46 Hygienic design of floor drainag
Page 49 and 50: 48 Hygienic design of high performa
Page 53 and 54: 52 Performance testing of air filte
Page 57 and 58: 56 Spray cleaning systems in food p
Page 59 and 60: 58 Spray cleaning systems in food p
Page 63 and 64: 62 Environmentally friendly water b
Page 65 and 66: 64 Environmentally friendly water b
Page 69 and 70: 68 Flow behaviour of liquid jets im
Page 73 and 74: 72 Optimisation of tank cleaning Th
Page 75 and 76: 74 Optimisation of tank cleaning Re
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Page 81 and 82: 80 Effective tank and vessel cleani
Page 83 and 84: 82 Effective tank and vessel cleani
Page 85 and 86: 84 Practical considerations for cle
Page 87 and 88: 86 Integrated hygienic tamper-free
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Page 112 and 113: A cleaner, healthier future. Cleani
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Page 122 and 123: Cleanability test of a hygienic des
Page 124 and 125: Aspects of compounding rubber mater
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New developments for upgrading stai
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International Hygienic Study Award
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EHEDG Regional Sections 131 MEXICO
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EHEDG Regional Sections 133 In Octo
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EHEDG Regional Sections 135 EHEDG D
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EHEDG Regional Sections 137 EHEDG G
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EHEDG Regional Sections 139 Members
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EHEDG Regional Sections 141 EHEDG L
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EHEDG Regional Sections 143 Beside
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EHEDG Regional Sections 145 To prom
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EHEDG Regional Sections 147 EHEDG R
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EHEDG Regional Sections 149 and adv
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EHEDG Regional Sections 151 Transla
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EHEDG Regional Sections 153 EHEDG U
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EHEDG Guidelines 155 Doc. 7. A meth
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EHEDG Guidelines 157 Doc. 18. Passi
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EHEDG Guidelines 159 Doc. 28. Safe
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EHEDG Guidelines 161 Doc. 37. Hygie
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EHEDG Subgroups 165 design, selecti
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EHEDG Subgroups 167 Given a clean s
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EHEDG Subgroups 169 • Doc. 26 Hyg
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EHEDG Subgroups 171 It will address
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EHEDG Subgroups 173 EHEDG Subgroup
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EHEDG Subgroups 175 Chairman: Andy
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EHEDG Subgroups 177 EHEDG Subgroup
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EHEDG Secretariat Lyoner Strasse 18
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