Vahterus Plate, User Manual

Page 1: ...User Manual for Vahterus Plate Shell Heat Exchangers English...

Page 2: ...t Exchangers All rights reserved It is not permitted to copy photograph or publish in any other way this manual for any purpose without the permission of Vahterus Oy Plate Shell is the registered trad...

Page 3: ...4 1 5 Droplet Separator 27 4 1 6 Steam Generator Kettle 28 4 1 7 Exhaust Gas Economiser EGE 28 4 2 General start up 29 4 3 General shut down 30 4 4 Start up and shut down of steam applications 31 4 5...

Page 4: ...Plate Shell Heat Exchangers PSHEs are made up of the Technical Data sheet Dimensional Drawing and this Operation Main tenance manual This manual is your general guide to the proper installation opera...

Page 5: ...s Plate Shell Fully Welded A welded pack of circular plates inside a welded pressure vessel The appli cations for this type are liquid liquid condenser evaporator and cascade This model cannot be open...

Page 6: ...ctive CE the design is based on PED classification and modules e g type approvals by NoBo 1 4 Technical specifications General range of parameters Volume from 0 0002 m3 to 5 m3 Temperature from 196 C...

Page 7: ...at Exchanger 2 1 Lifting Plenty of space should be provided around the heat exchanger for mounting insula tion and maintenance With the openable model there should be available space equal to the tota...

Page 8: ...requires these they should be installed in the pipelines as close as possi ble to the heat exchanger or if it is necessary to have them installed in the exchanger this should be specified when the ex...

Page 9: ...the exchanger is operating in a partial vacuum or if the pressure on the steam side is able in some cases to lower the pressure on the condensate side the use of a conden sate pump should be consider...

Page 10: ...temperatures marked on the nameplate and Technical Data sheet Ambient temperatures must not be higher lower than the design temperature range Environmental load load on connections caused by the pipi...

Page 11: ...rrosion The chloride content of water can cause corrosion in AISI 316L 1 4404 plate materials in a short space of time When water is boiling in particular it causes chloride precipitation and this can...

Page 12: ...is such that the flows alternate through the plate pack The flows can be controlled as counter current co current or cross flow Structure of the Vahterus Plate Shell heat exchanger The Plate Shell he...

Page 13: ...specified during heat exchanger heat transfer calculation 1 pass 2 4 pass 1 3 pass 1 pass openable In condensing applications the steam is on the shell side with the cold side on the plate side Shell...

Page 14: ...it can take place on the pack side HOT IN cold out HOT OUT COLD IN 1 pass eccentric HOT IN HOT OUT COLD OUT COLD IN 4 1 5 Droplet Separator The heat exchanger system is the same as in 4 1 4 with the a...

Page 15: ...re properly vented Any safety appliances are correctly connected There are no risk factors in the pipes that could cause shock pressure water ham mer or sudden changes in pressure First start the flow...

Page 16: ...c Close the outlet valves d Drain and vent the heat exchanger Gradually decrease the flow on the hot side until it stops completely Then close the cold side NB Valves must be set to open gradually Su...

Page 17: ...correct heating rate is 100 C hour for the first 100 C After that the temperature increasing rate is max 5 minute 5 Full capacity is reached by opening both sides gradually to full open position Steam...

Page 18: ...valve if any 4 If the unit is cold the correct heating speed is 100 C hour for the first 100 C After that the heating rate can be doubled 5 Gradually continue opening the hot cold side valves to reach...

Page 19: ...check of shell chamber and plate pack Local requirements for pressure vessel inspections should also be followed The in spection periods will be re evaluated by the inspector after every inspection a...

Page 20: ...requirements Description of the backwards flow system Close valves 1 1 and 1 2 The temperature of the heat exchanger must be between 10 C and 30 C Drain off the liquid from the side to be cleaned by o...

Page 21: ...the secondary side with chemicals 1 Close the valves 1 3 and 1 4 The temperature of the heat exchanger should be between 10 C and 30 C 2 Connect the hoses of the chemical cleaning system to the valves...

Page 22: ...dent 5 3 1 Preparations It is recommended that the unit should be moved to a location that is spacious enough to carry out any required service or maintenance Drain the exchanger on both the plate and...

Page 23: ...k out keep it horizontal if necessary by using lifting straps Place the straps in the lifting lugs on the blind flange When the plate pack is almost entirely out of the shell place two wooden blocks u...

Page 24: ...bered Always screw in the nut or bolt by hand This ensures that the thread remains in satis factory condition if the nut will not screw in by hand check the thread replace dam aged parts and start aga...

Page 25: ...portation Check that the gasket remains on the sealing face between the cover plate and flange If any damage is found please contact Vahterus as well as the trans port company responsible for the ship...

Page 26: ...of assigned parameters assigned storage period assigned service life operation of the equipment is stopped equipment is inspected repaired if nec essary and new assigned parameters are established ass...

Page 27: ...the manufac turer Problem Cause Checks Action NB Internal leak fluid mix Plate cracked due to water hammer or thermal shock Check that plate side liquid is visible on shell side leaking fluid will be...

Page 28: ...e nance check work plan Filter clogged Open filter and check its condition Clean change filter Problem Cause Checks Action NB Issue with valve and process controls Check operation of valves Open adjus...

Page 29: ...ormation 9 4 Criteria of limiting conditions for the equipment Mechanical wear abrasion scratches corrosion damage that exceeds the corrosion allowance for the wall thickness provided in the strength...

Page 30: ...ety valves have been installed and adequate safety measurements have been taken into account The plate pack or plate insert of an openable unit is never pressurised when outside the shell Sufficient m...

Page 31: ...vahterus com Vahterus is certified by Kiwa Inspecta ISO 9001 ISO 3834 2 ISO 14001 ISO 45001 Vahterus Oy Pruukintie 7 23600 Kalanti Finland 358 2 84 070...