large once-through boiler · large once-through boiler further evolution of once-through boilers....
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Keywords
Kawasaki Heavy Industries, Ltd./Kawasaki Thermal Engineering Co., Ltd.
Features
Basic Concept or Summary
Large Once-through Boiler
Further evolution of once-through boilers. High-performance, functional and long life, even equal to large boilers. Combustion and feed water PI controls.Equipped with a high-performance economizer. Water separator offers extremely high steam dryness.Equipped with a color touch panel. Equipped with self-diagnosis and safe mode functions.
F-27 Y3 equipment or facility Z2/3 oil/natural gas E25 general-purpose machinery
Equippedwith a color
touchpanel
Steam
Fuel
Exhaustgas
Exhaustgas outlet
Combustiongas
Combustiongas
Fuel Feedwater
Feedwater
Steam
Feed water coming into the boiler evaporates by combustion energy and generated steam goes up.
* EconomizerHeat recovery device utilizing remaining
Dischargesteam only
Recover waste heat
Exhaust gas
Heated feed water Economizer*
Exhaust gas
Source:JASE-W Japanese Smart Energy Products & Technologieshttps://www.jase-w.eccj.or.jp/technologies/index.html
Effects or Remarks F-27
Contact: Kawasaki Thermal Engineering Co., Ltd., Sales and Service Planning DepartmentTel: +81-3-3615-5821 Fax: +81-3-3615-5822http://www.khi.co.jp/corp/kte/
Domestic Sales launched in 2000.
Overseas Sales launched in 2006.
Installation in Practice or Schedule
High efficiency: Boiler efficiency of 98％ Stable steam pressure: ±0.01MPa with static load Long life: Designed to last for 15 years
Feature
Feature
Compact once-through boiler
2,000 x 4 units
Three position control
ON/OFF control
Three position number of units control
Large once-through boiler
4,000 x 2 units
PI control
PI control
PI number of units control
Equivalent evaporation (kg/h) x number of units
Fuel control method
Water supply control method
Number of units control
Steam pressure remains stable even when steam demand changes.
Boiler specifications for comparative verification facility of actual units.
Feature
Three features
High efficiency at partial loads
Combustion and feed water PI controls (proportional and integral controls)
Forced draft fan / feed water pump Inverter as standard
Steam dryness of 99.5% or dryer
Broad turn down 10:1 (optional)
Combustion control in response to O2 rate in exhaust gas (optional)
Highefficiency
Stable steam pressure
Long life
98%
Understatic load
±0.01MPa
Designedfor
15 years
Boiler efficiency (expected) curve (based on exhaust gas heat loss method)
Intermittent control (three position control)
Continuous control (PI control)
PI control
Compact once-through three position control
Pressuresetting0.7 MPa
Pressuresetting0.7 MPa
Steam pressure +0.07 and -0.28MPa, significantly variable when load changes occur.
Steam pressure Pressure stable at ±0.02MParange even when load changes occur.
)%( ycneiciffe relio
B
Operation load (%)
Source:JASE-W Japanese Smart Energy Products & Technologieshttps://www.jase-w.eccj.or.jp/technologies/index.html