Name: Retractable and Rotary Soot Blowers,and Electrical Accessories
Usage: TSEP boilers
Spec:
retractable soot blowers
no. required:two sets per each system/boiler total4 set,
type:ful retractable.
long retractable of stroke:4500mm,
nozzle per blower,maxmum:2,
type of nozzle:venturi,subersonic
clearing radius:2.125,
nozzle to tube wall distance:300 mm,
operation:sequential,
location:shal be located in the area above superheater as shown in attached drawing.
Rotray soot blowers specs
type:rotray with patial retracting,
nozzle per blower: to be specified by the manufaturer.
element length: 2.611 mm,driven by electrical motors/Qty:3 per each system/boiler total 6 ,for short stroke rotary multijet soot blowers of stroke 300 mm
1.73 mm, driven by electrical motor/ Qty:12 per each system/poiler total 24, for short stroke rotary multijet sootblowers of strlke (300mm).
nozzle to tube wall distance:300mm
operation:sequential
location : shall be located in the area of economzer no 1,2, and 3,for dimensions, location of sootblowers and areas to be covered please refer to the attached drawing.
electrical accesories
motor specification
the electrical motors shal be weather proof IP55
winding insulation class to be class F material.
the motor must be induction type,squirrel cage, 3 phasees, 400 v,50 hz
electrical conyrol panel specification
no required: one set for each system
all electrical squential operation shall be controlled by PLC
power and control panels shall be IP55
separate breakers as well as contractors and overloads for each of the following to be provided:steam and drain valves.motors and controling
ammeters and voltmeter to be provided for main circuit breaker
the voltmeter to be connected as the input side of the breaker
electrical interlock between advanced and return contractors.
motor starter board specification:
all circuit shall be molded case 3 pole, 400 v, with suitable trip rating for service,the interrupting capacity of circuit breakers must be adequate for the available short circuit current not less than 40 ka r.m.s , circuit breakers shall have thermal/magmatic trip feature of adjustable range.
all motors starters shal be 3 poles,400 v ,AC3 eith thermal overload relay of suitable range, coil voltage to be 230 v ,50 hz,signal phase.
spare parts: spare parts list shall be provided with parts numbers cross referenced to relevant drawing
utilities available at site
service air: 6_7 kg/cm ,not dehydrated
instrument air :6-7 kg/cm ^2, dehydrated
barrage air(scavenging air): 2000 m^3/hr at 6000 pa pressure supplied by indepent fan
blowing steam:17.6 kg/cm^2 at 260 c, superheated
electrical steam: the electricall supply system is three phase,400 v for main motor the frequency 50 hz |
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