Product Thermal Capacity: 1 - 20 t/h
Working Pressure: 0.7 - 2 Mpa
Available Fuel: Nature gas, coke oven gas, biogas, methanol, liquid propane gas, diesel, heavy oil, light oil, crude oil, etc.
Available Industries: Heat supplying, chemical, food, textile, printing and dyeing, cigarettes and tobacco, fodder, pharmacy, building materials, brewery, rubber, hospital etc.
WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere.
1. Digitized manufacture
The key part such as material cutting, rolling, drilling are proceeded by advanced CNC machining process to reduce the assemble stress and extend boiler working lifetime.
The front and back smoke chamber plates are cut by CNC plasma cutting machine and looks tidy and beautiful.
2.Easy operation and maintenance
Fully automatically operating, with automatically adjustment and protection of burning, water level, temperature and steam pressure.
3. Longer working life
Smoke tube and tube sheet connection is expanded first to eliminate the gap between them, then adopt automatic argon arc welding to relief the stress and expand boilers working life.
Longitudinal and girth joint adopt advanced automatic submerged-arc welding for good welding quality. All longitudinal and girth joint will have 100% radiographic inspection.
Fin tube us ND steel or stainless-steel material which avoid low temperature corrosion.
Inspection procedure point is set up to guarantee the sequence of expanding and welding, avoid cracking of the tube sheet holes.
4. Less fuel consumption
High quality aluminum silicate fiber is used with fire clay insulation, to control the boiler body temperature below 45℃ to control heat lost.
Sufficient steam storage room and heating area makes boiler to generate high quality steam and high thermal power.
Condenser is added to reuse the waste heat of the exhausted smoke to increase feeding water’s temperature and reduce emission temperature, which can increase the thermal efficiency above 98% and save operating cost.
Cited by: 5 David A. Tillman, in Coal-Fired Electricity and Emissions Control, 2018. 2.1.3 Control of NO x. Fluidized bed boilers of all types are, by virtue of their combustion temperatures, low NO x generators. Operating the reactors at temperatures ≤1700°F virtually eliminates formation of any thermal NO x.All NO x is generated from the conversion of fuel nitrogen.
Nov 22, 2017· Circulating fluidized bed (CFB) technology has developed rapidly in recent decades due to its fuel flexibility, effective NO x formation control and high-sulfur capture efficiency. As a result, CFB technology is regarded as the best option to utilize low-quality coal . By 2016, over 3000 CFB boilers were in commercial operation with a total
Jun Su, Xiaoxing Zhao, Jianchun Zhang, Aicheng Liu , Hairui Yang, Guangxi Yue, Zhiping Fu, Design and Operation Of CFB Boilers With Low bed Inventory, “Proceedings of the 20th International Conference on Fluidized Bed Combustion”, 2009.
Cited by: 20 Valmet CFB Boiler (formerly CYMIC) is an advanced circulating fluidized bed (CFB) boiler developed by Valmet. It combines high-efficiency combustion of various solid fuels with low emissions, even when burning fuels with completely different calorific values at the same time. The wide size range covers boilers from 30 to 1200 MWth.
Mar 29, 2019· 11/04/2018 14 Circulating Fluidized Bed Boiler Hydrodynamics The furnace of a CFB boiler contains a large inventory of granular solids called bed materials, which are typically in the size range of 0.1–0.3 mm. Bed materials may be made of the following: 1.
Apr 21, 2013· 123Bed Pressure— Cause of low bed pressure- loss of bed material- too fine of bed materials- high bed temperature— Cause of high bed pressure- agglomeration- too coarse of bed material 124. 124Bed Temperature— Measured above grid nozzle about20 cm— Measured around the furnace crosssection— It is the significant parameter tooperate CFB
Author: Xuemin Liu, Hairui Yang, Junfu Lyu Boiler engineers can choose between two main types of fluidized-bed boilers—bubbling fluidized bed (BFB) and circulating fluidized bed (CFB). In BFB boilers the velocity of the combustion air is low enough that the fluidized particles remain in the lower furnace; in a CFB unit the velocity is greater and hot particles are circulated through
Ultra-Supercritical Circulating Fluidized Bed (CFB) Boilers. 660 MWe for lignite B, higher for hard coal, for low-grade and difficult-to-burn fuels such as anthracite, lignite, petroleum coke, oil shale, discarded coal and biomass, GE offer circulating fluidized bed technologies with different arrangements suited to fuel .
The first CFB boiler product with the low inventory was placed and has been operated for two years in Datuhe Thermal Power Plant at Lishi, Shanxi province. The operation practice and measurement data show that the CFB boiler with the low bed inventory stands for the newest trend of the development of CFB boiler in the future.
It means that CFB boilers can be operated under a relatively low bed pressure drop by reducing the quantity of ineffective bed materials . After the fluidization state is optimized, the combustion profile and heat transfer in the furnace change and the formation of the pollutant changes correspondingly.
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