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Transcript of Chola Turbo
Ref no.: CBPL/ Proj/18/4/ 2012
M/S Chola Turbo Machinery International Pvt Ltd
Sub: Quotation for Design, Manufacture, Supply & Performance test of 17 TPH/ 45Kg/cm2,440 + 10 0C Boiler
Dear Sir, With reference to the discussion held with you, we are pleased to offer a quotation
according to your enquiry. We hereby submit out lowest offer. We hope that you will find our rates more competitive in the market & will find our offer in line with your requirements. For further clarifications, please feel free to contact us. Detail as under:
1. Scope of work : As per annexure I
2. Scope of supply : As per annexure II
3. Equipments specifications : As per annexure III
4. Design basis : As per annexure IV
5. Operating parameters : As per annexure V
6. Exclusions : As per annexure VI
7. Performance Guarantee : As per annexure VII
8. Erection & commissioning : As per annexure VIII
9. Price : As per annexure IX
10. General Terms & Conditions : As per annexure X
For CHAHAL BOILERS PVT. LTD.
Annexure- 1Scope of Work
Scope of work
1.1 Complete engineering & preparation of all required data, drawings, calculations etc, as required for boiler & its auxiliaries, which are under our scope.1.2 Co-ordination with director of Boilers for engineering & manufacturing of boiler at Haryana.1.3 Supply & performance test at your site.1.4 Boiler registration, inspection, & steam test with IBR authorities at site in client scope.
Write up on Boiler
A Boiler Pressure Part: The pressure part will consist of the following:
The boiler will be provided with a steam drum. This is of fusion- welded construction. The drum will be provided with welded ellipsoidal- dished ends, manhole doors fitted with cross bars, studs & nuts at each end. The drum shall be complete with required stubs for mounting valves & fittings. The steam drum shall be provided with drum internals to promote circulation & ensure steam purity.The thickness of the drum design shall be based on the requirement as specified under Indian Boiler Regulations 1950 with latest amendments.
Furnace – Water Wall Tubes
The furnace will be of natural circulation, balanced draft design. The fluidized bed combustor shall be provided with required number of compartments with individual air control system for continuous & nonstop operation of fluidized bed steam generator at varying load conditions. High rate of water circulation in the tubes is maintained so as to ensure the longer tube life. Water wall section shall be fabricated with welded type panel construction. Necessary supporting system shall be provided for expansion of components when the unit is in operation.
The super heater shall be of convective cum radiant design arranged in two stages primary & secondary superheater to achieve the rated steam temperature. Superheater shall be placed inside the membrane wall upper furnace zone. The superheater tubes shall be of ERW tube steel construction & non drainable type. The superheater system shall be complete with required headers, interconnecting piping, vents & drains, support etc. The superheater headers shall be placed outside the furnace, i.e. flue gas path.
Economizer shall be of plain tubular coil type, counter flow & drainable type construction with ERW tube.
General: Required numbers of fire doors is to be provided in the furnace & superheater section at appropriate location to observe the furnace, combustion, inspection & maintenance. Required number of explosion doors shall be provided.
B Fuel Feeding & Firing System
Fuel Feeding System
Boiler will be equipped with fluidized bed combustion chambers consisting of complete system of fuel transportation to fluidized bed furnace.
Fluidized Bed & Ash/ Sand Drain System
The fluidized bed system of proven design capable of continuous & reliable operation suitable for firing the specified fuel. The nozzle design shall permit the fluidsing at lower loads with provision to shut the individual compartments. Fluidizing nozzles shall be suitably sized stem portion extending from the bed plate to the furnace side.
Overhead FeedersOne nos. of overbed electronic control variable speed feeder are to be provided for feeding the fuel.
Secondary Air System
Secondary air system consisting of multiple high velocity nozzles with air swirlers is to be provided at required height in the fluidized bed combustor to meet the oxygen requirement & to create the turbulence for proper combustion of fines & volatiles.
Fire DoorsThe boiler is to be provided with required nos. of easy to open hinged type cast iron doors for easy access to the furnace & water walls from inside.
C Continuous Ash Discharge System
This is for the discharge of collected ash from various locations of the boiler plant. Ash collection & discharge out of equipments at different locations. Suitable hoppers are to be provided with various Equipments like APH, Bed ash discharge hopper & will have rotary air lock valves, which shall be mounted at bottom. RALV continuously discharge the collected ash.
D Air Pre- Heater
A shell & tube design air pre- heater is to be provided with the boiler at the downstream of economizer with gas flow inside the tubes & airflow outside the tubes. This will be a multi tubular, counter current flow, self-cleaning design equipment. The air pre- heater shall be complete with casing duly reinforced. Required access doors shall be provided for inspection & maintenance.
Forced Draft Fan
The boiler shall be equipped with one centrifugal type FD fans. Each fan is to be designed for a minimum discharge capacity of 20% higher than the theoretical air required at 35% excess air at MCR & head 20% higher than the required. The manually controlled damper is to be provided to regulate the air quantity to the furnace. The impeller will be dynamically balanced for vibration free operation.
Induced Draft Fan
The boiler shall be equipped with one number of centrifugal ID fan. The fan shall be designed for a minimum discharge capacity of 20% higher than the theoretical air
required at 35% excess air at MCR & head 20% higher than the required. The impeller will be dynamically balanced for vibration free operation. Renewable hard faced wear pads on the impeller blades are to be incorporated.
The boiler shall be equipped with one number of centrifugal S.A. fan. The fan shall be designed for a minimum discharge capacity of 20% higher than the theoretical air required at 35% excess air at MCR & head 20% higher than the required. The impeller will be dynamically balanced for vibration free operation. Renewable hard faced wear pads on the impeller blades are to be incorporated.
F Boiler Feed Water pumps
Two no. boiler feed water pumps to be supplied with the boiler. One Pump is for operation & other pump standby. The boiler feed pump is to be operated on a common suction as well as discharge main. Each feed pump is to be capable of meeting 110% of maximum continuous rating of the boiler. The pumps shall be of single suction, multi-stage & centrifugal type complete.
G Motor Control Centre
One set of MCC dust & vermin proof, conforming to IP 54; vertical standing is to be provided with starters for the drives in our scope. Necessary power supply to the incoming of MCC shall be provided by you.
Annexure – II
Scope of Supply
SCOPE OF SUPPLY FOR MAIN BOILER
All the supplied material; specifications are detailed in Annexure – II. Any deviation in Spec. shall be only after due approval from client.
1.0 Boilero Steam drum with internals.o Membrane Water Wall Panelo Down Comers & Riserso Radiation & Convection Superheater with inlet, intermediate & outlet Headers.o Necessary pipe connecting to drum & Superheater.o Forced Flow Economiser section with inlet & outlet headers.
2.0 Feed Water Systemo Boiler Feed Water Pumps (2 Nos.) complete with coupling & base frame
arrangement.o Feed regulating station for maintaining uniform water level in steam drum.o Parallel flow paths for start up & low load as well as higher loads up to 110% MCR
with a stand by flow path of 100% capacity.
Annexure- II (Contd.)
3.0 Valves & Mountings Air vent valve on sec. SH O/L header 1 No. Auxiliary valve on steam drum 1 No. Air vent valve on steam drum 1 No. Safety valve on steam drums 2 Nos. Gauge Glass cocks Assembly with Drain valve 2Pairs. Level Indicator / controller Isolation valve 2 Nos. Continuous Blow Down on water dram & headers 2 Nos. Blow Down on water drain & headers 1 No.
Drum Internal – Baffle plates, perforated plate, 3 Nos.Dry box tray, Steam Separator etc. Feed check valve on drum 1 SetEconomizer – Air vent valve 1 No.Eco. Instruments conn. Valve- I/L & O/L headers 1 No.
4.0 Set of IBR & Non IBR Valves & Mountings4.1 Main Steam Stop Valve at Secondary SH Outlet 1 No.4.2 Safety Valve on Sec. O/L Header 1 No.
5.0 Fuel Feeding
(A) Fluidized Bed/ Traveling Grate, furnace arrangements complete with plenum chamber, air nozzles etc. Over bed fuel feeding system including variable speed rotary feeders with pneumatic spreader for evenly spraying of fuel over the entire bed.
(B) Secondary Air System.
1nos. over bed fuel feeding system including variable speed screw feeders with pneumatic spreader for evenly spraying of fuel over the entire bed.VFDs for above feeders.
6.0 Air Pre-Heater (APH)
Multitubler air heater shell and tube type assembly.Ash Hoppers at the bottom of air Pre- heater with Rotary Air lock valve for continuously discharge of ash.
One no. FD fan designed for 80%MCR with motor. One no. ID fan designed for 80%MCR with motor. 3 nos. Rotary Air Lock Valve with gearbox and motor for continuous discharge of ash
hopper, economizer, Cyclone etc.
8.0 Interconnecting Piping
Super heater steam piping for boiler to MSSV. Air vent piping Interconnecting piping between, drum, super heater etc. Feed water piping from feed pump to economizer & from economizer to drum.
MCC consists of main incomer, switches/relays, fuses for the following equipments.
A. FD/ ID fan MotorsB. Fuel Feeder DriveC. Rotary Air Lock valves drive.
Annexure – III
1.0 MECHANICAL EQUIPMENTS1.1 Fuel Feeding System
No. of Feeders : 2 Nos.
Type of drive arrangement : Variable frequency Drive with Gearbox arrangement
Motor rating & Speed : 2KW/1440 RPM
1.2 Steam & Water Drum
DESCRIPTION UNIT STEAM DRUM
Design Code IBR 1950 with latest amendments
Material Specification ASTM A 516 Gr. 70
Design Pressure Kg/cm2 45
Design Temp. 0C 254
1.3 Boiler Tubes
Annexure – III (Contd.)
Particulars Tube OD (mm) Thickness (mm) Material
Furnace Water Wall 50.8 4.06 ERW tube
Boiler Bank 50.8 4.06 ERW tube
Super Heater 44.45 4.06 & 4.5 SA210, T-11 TUBES
Economizer 38.1 4.06 ERW tube
APH 60.3 3.00 ERW TUBES
PARTICULARS UNITS FD FAN ID FAN SA FAN
Make CBPL CBPL CBPL
Type Centrifugal Centrifugal Centrifugal
Total Differential Pr. Develop
Mm/wc 625 225 625
Design Temp. 0C 30 160 30
Fan Speed RPM 1920 1050 1920
No. of Operating Units One One One
1.5 Boiler Feed Water Pumps
TypeHorizontal multistage pump/ Plunger type
Total Differential head m3/hr. 14
No. of Pumps in Operations one
No. of stands by Pumps one One
Speed RPM 2900/80
Operating Temp. 0C 105
Rated Temp of BFW pump 0C 140
Annexure – III (Contd.)
Material ASTM A 106 Gr. B/ Equivalent
Size Mm X Mm 141.3 OD x Sch .80.
1. Primary2. Secondary
Size Mm x Mm 141.3 OD x Sch .80.
MOC of SH outlet Header ASTM A 335 P - 11
Annexure – III (Contd.)
3.1 Motor Controls Centre
Standard Followed IS 8623
Rated Voltage Volt 412
Material of Bus bar Aluminum
4.0 ATTEMPERATOR (In Client Scope)
Type Venturi Fixed Nozzles
Position in Steam CircuitIn Btw Intermediate
Pressure at Nozzle Inlet Kg/Cm2 48
1. Installation Outdoor
2. Steam boiler (Kg/hr) 12,000
3. Steam pressure (Kg/cm2) 45
4. Steam temperature (0 C) 440 + 10
5. Superheater temperature control range 95-105%
6. Outlet flue gas temp. (0C) 140
7. Water temp. at deaerator inlet (0C) 50
8. FuelPalwarised coll / wood
9. Fuel (GCV) 2500 -4000
Start up fuelCharcoal mixed with
Efficiency 85 + 5 %
Relative humidity (%) 58
Ambient temp. (Deg. C)
- Efficiency 30
- Insulation 45
- Electrical 48
12 Electrical Data
- LT Volt (V) 412±10%
- Control Volt (V) 220± 10%
- Frequency (HZ) 50
Compressed air pressure (Kg/cm2) 6 (Oil and Moisture Free)
1.0 TEMPERATURE PROFILE
1.1 Gas Temperature (0C) RANGE
Bed Temperature 700-750
Post combustion zone 850-900
Superheater inlet 750-800
Superheater outlet 650-700
Boiler outlet 350-375
Economizer outlet 250-275
Air pre-heater outlet 140
1.2 Steam Temperature (0C)
Superheater inlet Saturated
Superheater outlet 440+10
1.3 Water Temperature (0C)
Feed pump inlet (from Feed Tank) 105
1.4 Air Temperature (0C)
Air pre-heater inlet 30
Air pre-heater outlet 140+5
2.0 VELOCITY PROFILE (M/SEC)
2.1 Gas velocity
Boiler bank 7.0-8.5
Air Pre heater 12.0-14.0
3.0 PRESSURE PROFILE (KG/CM2)
Steam Drum 51
At the outlet of main steam stop valve 45
Super heater safety valve set pressure 48
Drum safety valve I set pressure 50
Drum safety valve II set pressure 52
4.0 DRAFT LOSS (mm/wc)
4.1 Gas side
Bank tube 35
Air Pre-heater 40
Dust collector 25
Ducting Bend 25
Total pressure drop 185
4.2 Air Side
Across Fluidized bed 400
Across Nozzles 100
Across Air Pre-heater 40
Across ducting/damper 30
The following are EXCLUDED from CBPL’s scope of supply:
a) All instruments supply, installation & commissioning.
b) Tanks for water storage, water treatment plant & its piping.
c) Earth pit.
d) Fuel storage bunker .
e) Any kind of civil works including main boiler support, furnace support boiler bank
support, concrete pedestals, foundation bolts, base plates and RCC operating platform
covering furnace, boiler economizer, air pre-heater.
g) RCC control rooms for boiler control panel and MCC, Air conditioners for the control
rooms, CVT/UPS for instruments.
h) Boiler roof and side covering and weather canopy including related structures to
mount the same. Rain water gutter piping. Complete RCC boiler house.
i) All utilizes like DM water, bed material, fuel etc.
j) Spares, other than commissioning.
k) Boiler registration and approval at site. However, CBPL shall provide complete
assistance to the purchaser during boiler registration.
l) Free boarding and lodging facilities including local conveyance for CBPL erection
personnel, as well as Engineers, Communication facilities at free of charge.
m) Forced draft air header and ducting from FD header to Air Pre Heater.n) Ducting from Air Pre Heater to Main Distribution Header and main air distribution
header to individual compartment.o) Dampers and expansion joints in FD air ducting.
p) Individual dampers at the suction of each compartment.q) Primary draft air ducting from FD fan header outlet to PA fan and PA fan to under bed
fuel feeding lines.1) Flue Gas ducting up to the inlet of chimney
2) Dampers and expansion joint in flue gas ducting from boiler to chimney.
Boiler drain piping upto blow down tank. Blow down lines from blow off valves to blow down tank.
Refectory & Insulation
Supply of refectory materials. Supply of insulation & cladding materials for CBPL equipments.
Supports & Platforms
Supporting structure for Boiler, Economizer from RCC firing floor (Ist Floor) level, APH from Ist Floor.
Supporting structure for air & flue gas ducting. All commissioning spares will be in Clients scope All P& I with specs will be approved by CBPL
Control Panel comprising basic instruments such as
A. Temp. MonitorsB. Alarm annunicatorsC. AmmetersD. Safety interlock System
Local Field Instruments such as,
Annexure- VI (Contd.)
Thermocouples and compensating cables to measure:
Bed temperature. Flue gas temperature before &after super heater. Flue gas temperature before economizer. Flue gas temperature before multi tubular air pre heater. Flue gas temperature after multi tubular air pre heater. Air temperature after multi tubular air pre heater. Feed water temperature before economizer. Feed water temperature after economizer. Steam temperature at superheater outlet. Pressure gauge to measure steam pressure at steam drum. Steam pressure at SH outlet header. Feed line pressure before feed control valve. Feed line pressure after feed control valve Inlet and outlet of feed pump pressure.
Draught gauges to measure
Furnace pressure. Air pressure of FD air. Air pressure of secondary air.
The Safety Interlock System
Unless ID fan is On, FD would not operate. Unless FD fan is On, Fuel Feeders would not operate.
The following closed loop complete with field mounted measuring elements, transmitters, i/p converters, pneumatically operated control valve etc. are include in the scope.
Steam Temperature Control (Attemperator)For turbine near constant steam temp. is desirable for good operation. Also upper & lower limits are very critical. This system is to monitor the operation of Attemperator precisely. Temperature of steam going to turbine is to be measured & signaled to master controller. Master controller will regulate the pneumatically operated water flow control valve. Attemperator will be situated between the Primary superheater & Secondary superheater. Required quantity of water is to be sprayed and mixed with the SH steam coming out from Primary SH. Then it will go to secondary SH.The temperature of SH steam out going from secondary SH, thus precisely maintained.
Single elements drum level control
Feed water Inlet of Feed Tank level control station.
Steam At the outlet of main steam stop valve.
Blow down/drains Outlet of blow down tank
Vent.exhaustUp to safe elevation of 2 m above the
boiler house roof
Cooling/ service water At one point
Instrument air At one point
Fuel Inlet of fuel feeder hopper
AshOutlet of ash hopper rotary air lock
Outlet flange of rotary air lock valve
below furnace, boiler bank,
economizer, air pre-heater
Combustion Air At the inlet of FD fan
Flue gas At the inlet of chimney
1. Maximum Continuous Rating of the boiler at 12TPH
with feed water temp. of 105 0C at deaerator inlet and Superheater outlet conditions of 45 Kg/cm2 and 440 +10 0C steam temperature.
Fuel Palwarised coll / wood chips
2. Boiler efficiency 85 + 5%
3. SH Steam temp. control range MCR 95-105%
4. Auxiliary power consumption As specified in Annexure-III
1. The boiler and its auxiliaries will give the performance as per the guaranteed figures given above subject to the following condition. Ambient temperature - 30 Deg. C Relative humidity - 58%
2. Performance guarantee tests and calculation will be made by the indirect method in accordance with ASME PTC 4.1.
3. Performance test run shall be for 72 hours at MCR.4. Feed water quality should be adhered to the recommended quality below.
Annexure- VII (Contd.)
WATER QUALITY REQUIREMENTExtract from IS 10392 – 1982, “Specification for feed water and Boiler water for low and medium land boilers.”
Characteristics Pressure 45-50 Kg/cm2
Total hardness (as CaCO3) mg/ltr., max. Not detectable
pH value 8.5 to 9.5
Dissolved oxygen mg/ltr. Max 0.01
Silica (as SiO2) mg/ltr., max. 0.02
Total hardness (of filtered sample) (as CaCO3 mg/ltr.) Not detectable
Total alkalinity (as CaCO3), mg/ltr., max. 300
Caustic alkalinity (as CaCO3), mg/ltr., max. 60
pH valve 10.0 to 10.5
*Residual sodium sulphite (as Na2SO3), mg/ltr., max. -
Residual hydrazine as (N2H4), mg/ltr. 0.05 to 0.3
Ratio Na2SO4/caustic Alkalinity (as NaOH)Applicable for riveted
Phosphates (as PO4), mg/ltr. (if added) 5 to 20
**TDS (DDM)., max. 110
Silica (as SiO2). Mg/ltr. 0.02
* Total alkalinity should preferably be about 20% of total dissolved salts.
** Shall not apply if reducing agents other than sodium sulphite are used.
TDS 0.1 ppm
pH 8-8.5 ppm
ERECTION AND COMMISSIONING (UNDER PARTY SCOPE)
The erection of the items supplied by CLIENT under this specification is the responsibility of
CLIENT. Erection shall be carried out according to well-established practices by Vendors
1.0 providing erection tools tackles, Hoists, derricks, slings scaffolding, rigging tools,
welding sets, instruments, appliances, consumables etc. required for erection,
inspection, testing and commissioning to accomplish the work.
2.0 arranging necessary inspection and IBR approval of all site related activities by the IBR
authorities. However, IBR statutory fees to be borne by client.
3.0 Providing complete supervisory personnel.
4.0 Ensuring pre-commissioning checks mass flushing alkali boil out, trail run of all rotating
equipment, calibration of instruments, controls etc., checking up of instrument
accuracy, under supervision of CBPL.
5.0 Providing all instruments for the above testing, checking, as well as for performance
testing of equipments and systems.
6.0 Conducting performance test after the satisfactory completion of trail operations and
on completion of satisfactory unit performance.
7.0 Strainer at the suction of feed water pump.
1. Price : Rs 110 Lac.
2. Payment Terms : 40% as advance along with Purchase order.60% against Performa Invoice.
3. Taxes : VAT/CST As applicable from the time of delivery.
4. Transportation : Will be extra as per actual.
5. Insurance : Extra as per actual, will be arranged by you.
6. General terms & conditions : As per annexure IX
7. Others : In the event of the any dispute of arising as result of Contacting to supply against this offer & Quotation the Place ofJurisdiction will be KARNAL and not any Other place.
8. Addn. Levies : Octroi will be charged extra as & if applicable at the time of dispatch as per
govt. rule.9. Force Majeure : We shall not be liable for any delay in
delivery by govt., Legislation, war, national defense activity, fire, strikes,Work stop page, transport delay, material scarcity, act of God or any other reason beyond our control.
We hope our offer meets your requirement & waiting for your valued purchase order. If you have any query please get in touch with us. We assure our best service to you at all time.
Annexure-XGeneral Terms & Conditions:
The equipment will be started of delivery within 120 days from the date of confirmed order along with advance. The delivery period shall commence from the date of receipt of your fully confirmed technically/commercially clear order/approval of drawings if any whichever is later.
Warrantee:The Boiler is warranted against any manufacturing defect or against malfunction arising out of faulty design; material and /or workmanship for a period of 12 months from the date of commissioning or 18 months from date of invoice whichever is earlier. However warranty will not cover the normal wear & tear or damage caused by accident wrong handling & improper maintenance. This clause will be applicable only if the purchaser strictly follows the operational & maintenance guidelines & manufacturer recommendations on feed water quality & fuel quality.
In the event of any dispute in the interpretation of the terms of contract or difference of opinion between the parties on ay point of contract arising out of, or in connection with the agreement/accepted purchase order or with regard to performance of any obligation here under by either party, the parties here to shall use their best efforts to settle such disputes or difference of opinion amicably by mutual negotiations.In case of non settlement the matter shall be referred to independent Arbitrator mutually acceptable to both parties for arbitration for resolving the dispute as per provision of The Arbitration & Reconciliation Act 1998 or any statutory modification or re enactment there of from time to time.
Force Majeure Clause:
The terms & condition mutually agreed upon shall be subject to Force Majeure Clause as given below:Neither the Purchaser nor the Supplier shall be considered in default in performance of its obligation hereunder, if such performance is prevented or delayed because of war, hostilities revolution, civil commotion ,strike, earthquake, epidemic, fire, wind, flood or because of any
law & order proclamation regulation or ordinance of any Govt. or any act of God or of any other cause whether of similar nature beyond the reasonable control of party affected .Should one or both parties be prevented from fulfilling his/their contractual obligations by state of Force Majeure lasting continuously for a period of six months the two parties should consult each other & decide regarding the future implementation of contract .
We have developed separate teams for undertaking the extra jobs not covered in our scope of supply for the installation of Boiler & its accessories essentially required for smooth commissioning of Boiler along with steam pipe line jobs, Condensate recovery system, insulation jobs etc.Insurance charges shall be extra & shall be arranged by you.CST/VAT as applicable against relevant sales tax form shall be charged extra. Similarly Excise duty as applicable shall be charged extra.Installation job will be got done through separate agency, However we shall be responsible for proper installation & commissioning of Equipment.In case our offer is accepted then we shall request you to give separate order for supply job & separate order for installation job to our sister concern.
Price Escalation Clause:
The above quoted prices are based on the prevailing market price of structural steel / IBR approved Boiler plates as on date of making offer. In case of increase in price of these materials beyond 5% while executing the contract prices will increase based upon the overall increase in cost by considering differential cost of price increase & its overall impact on manufacturing cost on account of escalation in steel prices.
Design & engineering:
We are well equipped with in house design facilities for the complete design & engineering of Boiler & associated accessories /equipment by a team of well qualified experienced & sufficiently trained staff.Manufacturing:We are well equipped with various fabrication facilities like sheet bending, welding, drilling etc & have a team of highly trained & skilled manpower for undertaking the jobs as per IBR norms. We are in an expansion mode & in a process of building more in house capabilities to cope with order requirement.
Up gradation of Design:
We reserve the right to amend the design of equipment while making supply of equipment as development up gradation in design of the equipment offered for better efficiency & performance shall be the main criterion.We hope that you will find our offer quite competitive & place your valuable order with us.Thanking you & assuring of our best services,
For CHAHAL BOILERS PVT. LTD.