Shell and Tube Heat Exchangers

Transcription

1 Shell and Tube eat Exchangers

2 Shell and Tube eat Exchangers TE RYROT RNE O NON-STORE ETIN LORIIERS VE EEN ESINE TO MEET TE REQUIREMENTS O TOY S ENVIRONMENT N RE SUITLE OR WTER TO WTER N STEM TO WTER PPLITIONS. RYROT LSO MNUTURE RNE O SEMI-PE UNITS, ULLY-PE UNITS N ONENSTE PUMPIN SETS. onstruction The NSZ range have welded mild steel shells, cast iron chests and copper U tubes. The shells, chests and the heater batteries are designed in accordance with S 853 with extended surface integron tube for efficient and compact units. The tubes are expanded into steel tubeplates under electronic control to ensure even expansion. atteries are adequately supported to prevent tube vibration and in the larger sizes a roller is provided to assist withdrawal. In many cases the heaters are baffled for increased performance. Mild steel chests are used when the design pressure exceeds 10 bar, the primary inlet temperature exceeds 120 or the size of primary connection necessitates it. esign actors corrosion allowance of at least 2 mm is included in the shell thickness. n overall fouling factor of sq. m /kw is incorporated which is equivalent to at least 10% extra surface for a clean unit. In a closed heating system the degree of fouling is minimal but if the secondary water is known to precipitate heavy scale additional heating surface is advisable. Points to remember when specifying nonstorage heating calorifiers Type of fixing Vertical or orizontal. uty required in kw or litres/sec. Primary and secondary temperatures. Steam conditions after the control valve. Working head or test pressure on the secondary side. Maximum working pressure on the primary side. etails of connections and mountings. ny special circumstances or regulations affecting the installation. ccessories onnections are provided to accommodate a safety valve, thermometer, pressure gauge, drain cock and secondary vent. Thermostatic control elements should be inserted into the secondary flow pipeline. bursting disc can be fitted if required. ll mountings and controls can be supplied by Rycroft. actory fitted insulation can also be supplied. Non-Standards There are occasions when other materials than those listed are necessary: for example copper, galvanised mild steel or stainless steel shells may be required to resist corrosive water and these can be supplied together with suitable batteries. Where severe scaling is expected and facilities do not exist for chemical de-scaling, there is good reason to use plain tube copper batteries. owever, this invariably necessitates a larger unit. Selection Sizing data exists for standard units on software running on an IM compatible P operating under MS-OS Version 3 or higher. loppy disks are available upon request. 1 ETIN TE WORL'S WTER

3 Water to Water Non-Storage alorifiers E 90mm E 150mm 100mm 2 Pass hest 4 Pass hest N.. ll connections up to 50mm (2 in) screwed unless otherwise requested. Limiting onditions S 853 Part 1 Shell Tubes.I. hest M.S. hest Maximum esign Pressure (ar) Maximum Test Pressure (ar) Limiting onditions S 853 Part 2 Shell Tubes M.S. hest Maximum esign Pressure (ar) Maximum Test Pressure (ar) The Maximum esign Pressures are listed as a guide only. The required design or maximum working pressure must be specified at the enquiry stage. STNR ONNETIONS Primary low Primary Return Secondary low Secondary Return E Pressure auge J Safety Valve Vent Thermometer rain Lifting Lugs Water to Water Non-Storage Tabulation Unit E J & & Mass (mm) onnections (mm) (kg) Sized to suit Primary low Rate Sized to the requirements of S 853 Sizing data is available on disk ETIN TE WORL'S WTER 2

4 Steam to Water Non-Storage alorifiers E 150mm 100mm STNR ONNETIONS Steam ondensate Secondary low Secondary Return E Pressure auge J Safety Valve Vent Thermometer rain Lifting Lugs N.. ll connections up to 50mm (2 in) screwed unless otherwise requested. Limiting onditions S 853 Part 1 Shell Tubes.I. hest M.S. hest Maximum esign Pressure (ar) Maximum Test Pressure (ar) E 100mm Limiting onditions S 853 Part 2 Shell Tubes M.S. hest Maximum esign Pressure (ar) Maximum Test Pressure (ar) The Maximum esign Pressures are listed as a guide only. The required design or maximum working pressure must be specified at the enquiry stage. Steam to Water Non-Storage Tabulation Unit E J & & Mass (mm) onnections (mm) (kg) ETIN TE WORL'S WTER Sized to suit Primary low Rate Sized to the requirements of S 853 Sizing data is available on disk

5 Steam to Water Semi-Packaged and Packaged Units N.. ll connections up to 50mm (2 in) screwed unless otherwise requested. STNR ONNETIONS Steam ondensate Secondary low Secondary Return E Pressure auge Safety auge Vent Thermometer J rain Lifting Lugs L eater M ooler N Stop Valve P Strainer R Steam Trap S Sight lass Semi-Packaged Units The Rycroft range of semi-package units are factory assembled and consist of a steam heating calorifier, condensate cooler, steam trap, sight glass, stop valve and strainer. The semi-package unit offers a very efficient method of recovering waste heat from the condensate. It both removes flash and cools the condensate assuming the secondary temperatures are below 100. condensate pump is required to feed the condensate back to the boiler plant unless the layout provides a gravity return. Limiting onditions S 853 Part 1 Shell Tubes.I. hest M.S. hest Maximum esign Pressure (ar) Maximum Test Pressure (ar) Limiting onditions S 853 Part 2 Shell Tubes M.S. hest Maximum esign Pressure (ar) Maximum Test Pressure (ar) The Maximum esign Pressures are listed as a guide only. The required design or maximum working pressure must be specified at the enquiry stage. STNR ONNETIONS Steam ondensate Secondary low Secondary Return E Pressure auge Safety auge Vent Thermometer J rain Lifting Lugs L eater M ooler N Stop Valve P Strainer R Steam Trap S Sight lass T Receiver Vent V Receiver rain W Overflow Pressure powered pump semipackaged units are also available for vented and fully sealed systems. Packaged Units The Rycroft range of fully packaged units offers the most efficient way of utilising waste heat from condensate. The unit includes steam calorifier, condensate cooler, steam trap, strainer, sight glass, mechanical pump and pump receiver ensuring that the flash steam is turned to useful heat and the condensate is pumped back to the boiler plant. ETIN TE WORL'S WTER 4

6 ondensate Pumping Sets TE RYROT RNE O ONENSTE PUMPIN SETS IS SUPPLIE ULLY PE, OMPRISIN ORIZONTL REEIVER MOUNTE ON MIL STEEL SUPPORT RME. STNR UNITS RE SUPPLIE WIT UTY N STNY PUMPS, PIPEWOR TO TE INLET ON E PUMP, ISOLTIN VLVES ON TE SUTION SIE N E VLVES ON TE ISRE SIE. STRTERS N LEVEL ONTROLS RE PRE-WIRE N TESTE. LIQUI LEVEL SIT LSS N REEIVER RIN O RE ITTE S STNR. Receivers are available in copper, galvanised mild steel or stainless steel. uplicate vertical/horizontal end suction centrifugal pumps with 3 phase, 415V, 50z motors. Low-high and extra high liquid level control with 4 probe liquid level sensing unit. esigned to handle and pump condensate up to 95 with higher temperatures available if required. Electrical Specification utomatic changeover pump and liquid level control system comprising: Pressed steel I.P. 55 enclosure. oor interlock isolator switch. Three position selector switch for manual or auto changeover pump selection. Power on lamp. Power run lamp. Pump trip lamp. Seven day time switch for pump changeover sequencing. Pump contactors, overloads and auto changeover relays. 415V to 110V x 50V control circuit transformer. igh sensitivity, relay output liquid level switches for low-high and extra high liquid level control. 4 probe liquid level sensing unit for low-high and extra high liquid level for cascade switching of pumps. Volt-free contacts for user remote alarm facility. ll necessary fuses, terminals and inter-connecting wiring. Wiring external to enclosure to be in flexible PV conduit. 150mm imensions imensions onnections (mm) Pump ischarge Motor Power Unit E kw Inlet Vent and rain Screwed Overflow SP emale PS PS PS PS PS PS PS PS PS PS PS PS PS ETIN TE WORL'S WTER

7 Replacement U-Tube undles RYROT N PROVIE REPLEMENT TUE UNLES OR MOST LORIIERS IRRESPETIVE O TE ORIINL MNUTURER. WERE TE ORIINL TYPE O TUE IS NO LONER VILLE, OUR ESIN EPRTMENT N OTEN OER N LTERNTIVE RRNEMENT. The following materials are available: Tube: opper low fin tube opper plain tube Stainless Steel low fin tube 304 and 316 Stainless Steel plain tube 304 and 316 opper Nickel low fin tube 90/10 and 70/30 opper Nickel plain tube 90/10 and 70/30 luminium ronze luminium rass lange: arbon steel rass 70/30 rass 60/40 Naval rass Stainless Steel 304 and 306 opper Nickel 90/10 and 70/30 luminium ronze luminium rass The following information is required when specifying replacement tube bundles: Outside flange diameter lange thickness Raised face diameter and thickness lange material Tube material affle material Maximum operating pressure Maximum operating temperature Number of tube holes iameter of tube Type of tube Number of baffles Type of baffles (half, quarter, etc.) Pitch type Pitch centres olt pitch circle diameter olt hole circle diameter Number of bolts Size of bolts olts on/off centre Number of passes Pass centres Overall length Extras (if required) ollar bolts Runner wheels Starting screws Lifting eyes Spare gaskets Overall Length P PIT PIT PIT PIT lange Thickness O/ PIT LYOUT PIT LYOUT 1st RS 2nd RS 2nd RS 2nd RS 2 Pass Layout 4 Pass Layout 1st RS 6 Pass Layout 1st RS 8 Pass Layout 1st RS ETIN TE WORL'S WTER 6

8 SUPP Plate eat Exchangers Shell and Tube eat Exchangers OMP Plate eat Exchanger Packages MXIMISER Semi-Storage alorifiers alorifiers/ylinders Unvented Packages Pressurisation Electric Water eaters Rycroft Process Solutions S EN ISO 9001 M No Rycroft Ltd, uncombe Road, radford, England 8 9T. Telephone: +44 (0) acsimile: +44 (0)