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maximum moisture content for chain grate boiler

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.

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Introduction of WNS gas / oil fired steam boiler:

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.

Technical advantages:

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.

(PDF) The impact of coal quality on the efficiency of

The water-tube spreader stoker boiler used in this investi-. gation has a heating surface area of 169.5 m 2, mean height. of 9.98 m, width of 4 m, effective length of 4.8 m, a grate. area of about

Chain Grate-Type Stoker | Hybrid CG | Hurst Boil

Chain Grate-Type Stoker. This combination is particularly suitable for heating applications in lumber dry kilns, veneer log vats, veneer dryers, greenhouses, factories, schools and office buildings. This combination enables these systems to provide a flexible and reliable operation utilizing a consistent "grade" of biomass waste with moisture contents ranging from 30 - 50%.

Chapter Combustion Technologies and Heating Syste

• Moisture content • Fuel composition (=> GCV) • Volatile content and char content • Thermal decomposition behaviour • Ash content and ash behaviour => The combustion technology has to be appropriately adapted to the fuel quality! 3.1.2. Combustion Temperature • …

Biomass boilers | Poland | Granp

Automatic boilers burn biomass with maximum moisture content up to 15%: wood pellets, straw pellets, grain (eg. oat), production wastes (eg. seeds of fruits, nuts shells, sunflower husk). Biomass boilers Granpal Medium. Biomass boiler Granpal Medium with power from 200 kW to 600 kW. We offer different types of biomass boilers Granpal Medium with moving grate burn:

From small to large scale - biomasstradecentre2.

File Size: 1MB forest chips produced from small wood are €16-21/MWh ( 4.4-5.9/GJ). For monitoring the quality of the fuel, samples are taken from each delivered fuel batch in order to determine the mean value of the moisture and bulk density of the chips. The moisture content of small wood chips usually varies between 18 and 40w …

5. Biomass Conversion Technologies - US E

5. Biomass Conversion Technologies . Moisture Content Capacity Range . Stoker grate, underfire stoker boilers . Sawdust, bark, chips, hog Chain grate, traveling grate, and water-cooled vibrating grate stokers are other less common configurations that use various means to

chain grate boiler in shanghai - YouTu

Aug 05, 2008· COAL STEAM BOILER WITH CHAIN GRATE STOKER - Duration: 2:39. Babak Shahri 17,850 views

Methods of Firing Steam Boiler | Electrical

Mar 15, 2020· When fuel i.e. coal is put into the steam boiler furnace by means of a mechanical stoker, the firing of boiler method is referred as mechanical stoker firing.There are mainly two types of mechanical stoker firing systems.. Under Feed Mechanical Stoker Firing. Here, combustion takes place on the grate.


ash content and moisture content. Complete compatibility with auxiliary or alternate 6. fuels. . Complete capability with conventional power boiler 7 designs which are well proven and cost competitive. Compatibility with most existing power boilers for 8. ease of …

A comparison between two different methods of combusti

Steam data in regards of pressure and temperature for grate- firing at state (1) is usually 40-50bar and 400-450°C (Nohlgren et al. 2014). In the calculations, the lowest pressure and temperature, 40 bar and 400°C will be used to show how the lowest pressure and temperature affect the total power output.

BOILERS | Energy-Models.c

It occurs as grit carry-over or carbon-in-ash and may amount to more than 2% of the heat supplied to the boiler. Non uniform fuel size could be one of the reasons for incomplete combustion. In chain grate stokers, large lumps will not burn out completely, while small pieces and fines may block the air passage, thus causing poor air distribution.

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0086-510-68530066, +86-13506151292

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