Introduction to Boiler House Products Typical Layout of Boiler House Products Page 2 Boiler Hotwell Chemical Dosing Pot Vent Head Flash Vessel Flash Vessel Non Storage Calorifier Storage Calorifier Blowdown Vessel Condensate Pumpset PHE PlantPac Not supplied by CA-HVAC CA-HVAC provide a wide range of steam related products including: Blowdown Vessels - Fabricated to PD5500 CAT III with notified body approval. Condensate Pumping Sets to suit most applications incorporating electronic air/steam driven pumps. Hotwell Tanks with optional de-aerator; Steam Seperators with vortex flow pattern system. Chemical Dosing Pot complete with valves and tundish. Vent Heads are designed to remove water from discharged steam, and are fitted with an internal baffles.
10
Embed
Introduction to Boiler House Products - CA-HVAC House Products.pdf · Introduction to Boiler House Products Typical Layout of Boiler House Products Page 2 Boiler ... along with a
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Introduction to Boiler House Products
Typical Layout of Boiler House Products
Page 2
Boiler
Hotwell
ChemicalDosing Pot
VentHead
FlashVessel
FlashVessel
Non StorageCalorifier
StorageCalorifier
BlowdownVessel
CondensatePumpset
PHEPlantPac
Not supplied by CA-HVAC
CA-HVAC provide a wide range of steam related products including: Blowdown Vessels - Fabricated to PD5500 CAT III with notified body approval.Condensate Pumping Sets to suit most applications incorporating electronic air/steam driven pumps. Hotwell Tanks with optional de-aerator; SteamSeperators with vortex flow pattern system. Chemical Dosing Pot complete with valves and tundish. Vent Heads are designed to remove water from discharged steam, and are fitted with an internal baffles.
Introduction
Design
Sizing
By using the CPS condensate recovery system, the normally wasted energy in a steam system is recycled by recoveringthe condensate and returning back to the boiler hotwell feed tank. Not only does it save energy in heating new water, italso reduces the cost of chemical dosing as the recovered condensate has already been treated.
The condensate receiver can be sized to suit any additional condensate recovery lines available, the condensate lineinlet is maintained fairly low to aid installation on gravity fed systems.
The pumpset is available as a single pumpset or a twin pump unit. The pump(s) on the unit are sized at 100% of the duty,with a cascade operation (twin pump units) should the design duty be exceeded. The twin pump unit also incorporate anauto-change over function.
The pumps used are multi-stage with a stainless steel body and can handle condensate up to 99°C.
The receiver can be manufactured from the following materials:Stainless Steel AISI 304LStainless Steel AISI 316L
The pipework material is in an appropriate material and would be screwed or welded to suit site conditions.
Dependant on the size of the pumpset, the unit can be supplied in either 240v 1ph or 400v 3ph. The control panel hasindicator lights for Power On, Pump Run/Trip, hand selector for Pump Action and Leed Pump Selector. Door interlockedisolator. The panel is supplied complete with volt free contacts for pump tripped and level alarms for connecting to a BMSif desired.
Draw a line vertically from your required flowrate and draw a line horizontally from the pump delivery head required. Thiswill give the required model of unit for the given duties.
Once the correct model selection has been made, the required material selection should be made from the lists above.With this information, we can offer a competitive price for your condensate pumpset.
ü
ü
Condensate Pumpsets
Page 3
Pumpset Receiver Thermal Insulation OptionsType MAü Consists of 50mm mineral wool with stuccoaluminium cladding. this gives good thermal insulationand a quality finish.
For some installations there will be a high risk of damage to thefactory fitted insulation. In these instances it is preferable toinsulate on site.
Level Control Switch
Condensate Receiver Vessel
Electrical Control Panel
Pump Discharge Isolation Valve
Vessel Drain
Vessel Overflow
Pumps
Receiver Level Gauge
Check Valve
1
2
3
4
5
6
7
8
9
Page 4
Condensate Pumpsets
CONNECTIONS (Unit Details on Page 5)
1
2
3
4
5
6
7
8
9
10
Sight Glass
Control Panel
Pumped Outlets
Pump Isolation Valve (Butterfly)
Level Control Switch c/w protection tube
Condensate Return
Condensate Inlet
Pump
Overflow
Drain c/w isolation valve
DetailsFlanged connections to BS EN1092-1:2002 PN16screwed connections BS21
The dimensions shown are the maximum overallof the specified unit. Please contact our salesoffice with any enquires with different dimensionsto those shown.
BV blow down vessels are designed andmanufactured fully in accordance with the latestversion of Pd5500, inspected during design andmanufacture by an independent insurance companyand supplied complete with a data dossier. They alsocomply fully with the European Pressure EquipmentDirective 97/23/EC (SI 1999/2001) and are CEmarked.
When a steam boiler evaporates water the dissolvedminerals in the remaining boiler water areconcentrated. To prevent the concentration becomingexcessive and causing damage to the boiler some ofthe water is “blown down” from the boiler periodicallyand replaced with fresh water. The blow down waterloses pressure rapidly, resulting in the evolution offlash steam. This mixture of steam and hot water is apotential hazard. It is not permissible to drain water topublic sewers above 43°C so the blow down watermust be safely contained and allowed to cool first. TheBV Blow Down Vessel is designed to do this.
Select the appropriate blow down vessel from theTables 1 and 2. Table 2 allows for a loss of boilerpressure equal to 8 metres pipe length in the blowdown line. If the loss is less than 8 metres thenmultiply the actual boiler pressure by 1.2 before usingTable 2. Calculate the loss in pipe lengths using Table1 and adding the length of straight pipe.
Boiler blow down installations must comply with thePressure Systems and Transportable Gas ContainersRegulations 1989 (”Pressure Systems Regulations”)(HMSO). Recommendations on design of boilerinstallations are given in BS806 and PM60 (availablefrom BSI and HMSO respectively). Following theserecommendations will satisfy most of the requirementsof the Pressure Systems Regulations.
Pm60. Also, the HSE Guidance Note PM5 (availablefrom HMSO) states various requirements for thesystem design. Blow Down Vessels must have aminimum design pressure of 7 BarG or 25% of boilerpressure, whichever is the greater.
pressure 7 BarG - higher on request.
Vent Head - Stainless Steel, Screwed or FlangedCooling System - Direct Acting Valve & SensorInlet Manifolds (Three off) - Supplied Complete withIsolation & Check Valves.
Table 1
Main Blow Down Line
Size1" 1¼" 1½" 2"
Pipe Fitting Equivalent Length of Pipe in Metres
Blow Down Valve 0.3 0.35 0.4 0.5
Long Radius Bend 0.5 0.65 0.75 0.9
Globe Valve 9.5 12 14 18
Check Valve 3.5 1.3 5 6.3
Mainifold Inlet 1.1 1.5 1.7 2.2
Table 2
Main Blow Down Line
Size1" 1¼" 1½" 2"
Boiler Pressure (BarG) Blow Down Vessel Type BV…
5.5 1 1 1 2
7.5 1 1 2 3
8.5 1 2 2 4
10.5 1 2 3 4
12 2 2 3 5
17.5 2 3 4 5
20.5 3 4 5 6
24 3 4 5 6
27.5 4 5 5 7
CA-HVAC blow down vessels comply with BS806 and
CA-HVAC blow down vessels have a standard design
Page 7
Blow Down Vessels
Design Code:PD5500CE MarkedComplies With SI 1999/2001Pressure Equipment DirectiveComplies with HSE Guidance Note Pm60
Material: Carbon SteelDesign Pressure: 7 BarGDesign Temperature: 171°CHigher Pressure and Temperature Units onRequest
Outlet (T) has an internal dip-tube to allow blowdown to cool before disposal. If disposaltemperature exceeds 43°C, water cooling will beneeded.
Hotwell Boiler Feed Tank Thermal Insulation OptionsType MAü Consists of 50mm mineral wool with stuccoaluminium cladding. this gives good thermal insulationand a quality finish.
For some installations there will be a high risk of damage to thefactory fitted insulation. In these instances it is preferable toinsulate on site.
Thermometer
Vent Head
Tank Contents Sight Gauge c/w protector
Electronic Cold Water Make Up Feed
Electrical Level Control System
De-Aerator Head Assembly
Re-Cirrculation System
External Ladder System
De-Aerator Head Inlet Manifolds
HW boiler hotwells are the source of high heat losses and on-going maintenance.is a fully lined carbon steel tank virtually maintenance free.
Heating the boiler feed water prior to it entering the boiler reduces oxygen levels in the water which can causecorrosion and also reduces the amount of chemical dosing required.
All wetted parts are manufactured from quality British Standard steel plate and the internal surface is coated witha Water Research Council approved epoxy lining system offering good protection against internal corrosion.
AISI 304L or AISI 316L grades stainless steel. The tank is internallysupported using stainless steel angle and the whole structure is acid cleaned after manufacture.(Please note that stainless steel hotwells can be subjected to corrosion if high concentrates of Chlorides arepresent in the system).
The HW hotwell is manufactured to suit the individual customers needs. Therefore a detailed drawing is producedto enable the customer to mark up his connection requirements (this is most helpful when the unit is areplacement and ensures pipework alteration is kept to a minimum) A test certificate is issued on completionalong with a report on the soundness of the internal coating (carbon steel tanks).
GeneralGuidelines for installation and use are given below. However, the equipment and water treatment in use in any individualsystem may dictate variations so please consult your water treatment supplier to ensure best results.
Slowly open the drain valve - caution - some water and flash steam may be emitted to the disposal point.Open the dosing valve, and the vent screw. The contents will now drain out.Close the drain valve.Fill the chemical dosing pot to the vent with the required amount of chemicals, diluted as necessary.Close the dosing valve and vent screw.Open the system valves to allow system water through the unit.
Installation
Use Caution: The dosing pot contents may be hot. Take care - avoid scalding. On higher temperature systemsthe contents may be above atmospheric boiling point. Opening valves may cause a release of flash steam.
Material Options:Shell:
Valves:
Tundish:
Specification:
Choose a location near a main run or system header. Fasten the chemical dosing pot securely in place using thebrackets provided. Pipe the drain away to safe disposal point. Connect the system connections to the pipe or systemheader. To ensure that there will be a flow through the chemical dosing pot leave sufficient gap between the connectionpoints to give a difference in dynamic pressure between them (1 metre apart should be enough). This will admit the watertreatment gradually to the system water. Alternatively, connect between flow and return headers, which will admit thewater treatment more quickly.
Isolate the chemical dosing pot from the system by closing the two ½” system ball valves.
is essential for the corrosion protection of heating systems. CA-HVAC chemical
Page 11
Vent Heads
De-Aerator Heads
General
immersion tube.
The mixing head is designed to mix incoming flows of condensate from the system, flash steam, cold watermake-up feed and re-circulation feed. Each inlet connection has an internal sparge which sprays the flow invarious directions within the head. These gases are then vented to atmosphere.
The de-aerator head re-circulation connection has an internal spray nozzle to help mixing of the various
literature for further information.
The unit is designed to be maintenance-free with a stainless steel body (wetted parts). Gaskets and allbolting are supplied with the unit.
De-Aerator Head Thermal Insulation OptionsType MAü Consists of 50mm mineral wool withdimpled aluminium cladding. this gives goodthermal insulation and a quality finish.
For some installations there will be a high risk of damage tothe factory fitted insulation. In these instances it ispreferable to insulate on site.
Dimension and Connection Data
Unit
Ref
Connection
SizeH
mm
L
mm
Drain
Size
Weight
kg
VH50 2" BSP 210 150 ½" BSP 1.5
VH65 2½" BSP 230 175 ½" BSP 1.7
VH80 DN80 PN16 270 200 ½" BSP 2
VH100 DN100 PN16 300 225 ½" BSP 6
VH150 DN150 PN16 325 250 ½" BSP 12
VH200 DN200 PN16 375 350 ½" BSP 18
VH250 DN250 PN16 400 500 ½" BSP 25
VH300 DN300 PN16 450 600 ½" BSP 32
Drain
GeneralV They are designed toremove water from discharged steam. The vented steam hits the internal baffle plate before discharging to atmosphereand any residue water drains out of the head.