Introduction
Overview of the WNS Series Gas/Oil Fired Steam Boilers
WNS series gas/oil fired steam boiler adopts boiler-shell type corrugated furnace structure,smoke three-pass with a wetback smoke-transfer chamber,spirally corrugated tube tech.The complete set product of boiler consists of burners,boilers,control systems and accessories.This series of products are designed to be safe,reliable,efficient,energy-saving and environmental protection.It also features convenient maintenance,long service life,automatic intelligent control,etc.Boiler Body Structure
The main body of WNS series gas and oil fired steam boiler adopts single drum,horizontal and wet back structure.The boiler drum is fixed on the body chassis through the fixed and movable supports at both ends,and ensures the longitudinal thermal expansion of the whole boiler.The corrugated furnace constitutes the combustion chamber of the boiler,smoke tube bundles are boiler convection heating,the smoke three-pass form.
Three pass Flue as follows:
• The first pass--corrugated furnaceThe high-temperature flue gas generated by combustion gathers in the recombustion chamber and turns to enter the second return journey,that is, the flow of the threaded smoke pipe bundle area.
• The third pass--long smoke tubeIt enters the smoke pipe through the front smoke box,and after convection,the temperature of the flue gas gradually decreases,then flows into the chimney through the economizer and condenser,and finally is discharged into the atmosphere.
Boiler features
★ The combustion chamber adopts the corrugated furnace,which reduces the thermal stress and improves the safety of the boiler;★ The boiler body adopts wet back structure,which is safe and reliable;
★ The threaded smoke pipe enhances heat transfer and reduces the steel consumption of the body;
★ The boiler is fully automated, with automatic operation and interlock protection functions, and easy to operate;
★ The rear of the boiler adopts a spiral fin tube economizer,which reduces the exhaust gas temperature and has high thermal efficiency.The design efficiency is more than 90%,and the design efficiency of the condenser is more than 95%.
★ Boiler is horizontal layout,compact structure,small footprint;
★ The front and rear smoke boxes are easy to open,which is convenient for users to check and clean;
★ The flue gas side seal adopts a labyrinth double structure,the flue gas is not easy to leak,and the boiler room is clean and hygienic;
★ The boiler is shipped from the factory as a whole,which is convenient for transportation and short installation period;
★ According to different burner configurations,the boiler can burn heavy oil,light oil,natural gas, liquefied gas and other fuels,and the burner can be controlled by position control and proportional adjustment.
System
Composition of Boiler System
·Combustion system
·Steam water system
·Control system
·Combustion system
The combustion system supplies fuel to the boiler for heat generation.
Gas/Oil fired steam boilers' combustion system equips with burner and fuel device according to the fuel properties,steam capacity and pressure of the boiler.
Burner brand:Baltur,Riello,Weishaupt,Hofamat,Honeywell,Ecoflam,Cavallo and so on.
·Steam water system
The steam water system consists of feedwater part and steam part.
Feedwater part:Feedwater refers to the water that is provided to the boiler for steam conversion. The feedwater channels water into the boiler and automatically controls it to satisfy steam requirements.
Steam part:the steam is the part of the boiler responsible for collecting and regulating the steam generated by the boiler. Valves and pressure gauge controls are used to monitor and regulate steam pressure.
The steam and water system should be composed of boiler main body,rear heating surface(such as economizer,condenser and so on which are equipped according to actual situation of user),water treatment device,feedwater pump,steam header,deaerataor and so on.
·Control system
Boiler control system is a collection of boiler electrical control components,a center for collecting and processing boiler operating signals,and an operation platform for sending execution instructions to each execution unit of the boiler.
If you want the boiler system to realize the IoT(Internet of Things) service for boiler system, we can provide you with this service when designing the control system.
The IoT system for boiler system adopts a layered structure design, namely data collection layer(M BOX), cloud platform(M SERVICE), and application layer(MYZT application system).
The control system of WNS series steam boiler provides the control of boiler water level,pressure, burning,safety protection and so on.
Control principle:Through the real-time data collection,monitoring and processing of boiler water level,pressure,flue temperature and burner,the purpose of intelligent and safe operation is achieved.
★The Core Control Mode of the steam boiler system:MCU control(Microcontroller unit), Integrated controller (All-in-one PLC,not programmable),PLC control(programmable),PLC+PC control,DCS control.
★ Standard Control Content:boiler water level,steam pressure control,alarm and interlock,and set up an automatic control system for combustion start and stop.
★ Steam Boiler Control Modes of Operation: Automatic and Manual
a) The boiler in automatic mode is in fully automatic operation state,
b) Manual mode:The operation of the boiler equipment is controlled by manual operation. Under normal circumstances,the boiler should operate in the automatic operation state.In special cases,it will be required to switch to the manual state.
★ Control system detection data sources: burners,temperature sensors,pressure transmitters, pressure controllers,liquid level gauges,flow meters,electric regulating valves and other remote instrument valves.
Features
• Indication of operating status, with start/stop button
• Feed water pump interlock
• Scheduled startup of operation
• Display of numbers of ignition and combustion
• High temperature /high pressure/ low pressure/ antifreeze/ burner stop alarm functions
• Display of malfunctions
• Self-interlock during power down for protection
• Date/information collection, analysis,and storage function
• Password protection of controller
• Modbus RS485 interface,connection to upper control system or DCS system of the plant from multiple boilers
