Complaint
Automatic Moving Grate Coal Fired Steam Boiler is horizontal single-drum shell boiler with water-fire tubes. It has chain grate as burning device, upper-in-and-upper-out style natural water circulation with ejection for hot water boiler of this series, the right and left side of furnace as radiant heating surface, two wings of furnace and threaded smoke tubes as convection heating surface and three-dimensional shield shell. Furnace is divided by Smoke baffle wall into combustion chamber (firebox) at front and reburning chamber at back.
Model:Chain Grate Stoker Type Steam Boiler
Structure:Three Pass Single Drum
Fuel:Coal, Biomass, Wood, Chip, Husk, Sawdust, Jute, Shell, Waste Solid Fuel etc.
Capacity: 1 - 20 ton/h (1ton,2ton,4ton,6ton,8ton,10ton,15ton,20ton)
Pressure:0.7/1.0/1.25/1.6/2.5Mpa (7Bar/10Bar/12.5Bar/16Bar25Bar)
Temperature:170/184/194/204/225 C
Application:Food and Beverage,Textile,Plywood,Rice Mill,Chemical,Paper Mill,Rubber Plant et
Sush as: Medicine, chemical, light industry, textile, building material, cultivation, food and beverage, plastic foam, printing, dyeing and washing, rubber processing, paper products,wood processing, hotel, clothing and leather manufacturer etc.
Biomass Fired Boiler Burning process
The fuel falls from the coal hopper to the front of the grate. With the operation of the grate, the coal undergoes preheating, dry distillation, ignition, and embers. The slag falls into the slag hopper and is discharged from the furnace at any time by the slag remover. The flue gas is in the front and back arches. The throat between the throat can form a vortex to fully mix with the air, heat the front arch, improve the fire conditions, enter the two-wing convection tube bundle through the exit smoke window on the upper part of the arch, enter the threaded smoke pipe through the front smoke box, and pass through the economizer and dust collector. The induced draft fan is led to the chimney and discharged.
| Model Item | DZL1-0.7-AII DZL1-1.0- AII DZL1-1.25- AII | DZL2-0.7- AII DZL2-1.0- AII DZL2-1.25- AII | DZL4-1.25- AII DZL4-1.6- AII | DZL6-1.25- AII DZL6-1.6- AII | DZL8-1.25- AII DZL8-1.6- AII | DZL10-1.25- AII DZL10-1.6-AII (Assembly) | DZL20-1.6-AII DZL20-2.5-AII (Assembly) | |
| Steam Capacity (t/h) | 1 | 2 | 4 | 6 | 8 | 10 | 20 | |
| Steam Pressure (MPa) | 0.7/1.0/1.25 | 1.25/1.6 | ||||||
| Steam Temperature (ºC) | 170/184/194 | 194/204 | ||||||
| Feed water Temperature(ºC) | 20 | 20 | 20 | 20 | 20 | 70 | 70 | |
| Heating Area(m2) | Body | ~33 | ~50 | ~100 | ~170 | ~200 | ~250 | 502 |
| Economizer | 10.56/10.56/20.7 | 27.6 | 52.48/33.12 | 87.2 | 98 | 174 | 382 | |
| Effective Grate Area(m2) | 2.22 | 2.22 | 4.1 | 5.5 | 7.95 | 9.75 | 23.9 | |
| Fuel Type | II Bituminous Coal, Lower Heating Value Q≈21000KJ/Kg | |||||||
| Fuel Consumption (kg/h) | ~151 | ~302 | ~600 | ~880 | ~1150 | ~1450 | ~1160 | |
This coal fired boiler is single drum horizontal type shell boiler, the combustion equipment is chain grate, has the advantages of feed mechanically and strong adaptability of different fuels.
The DZL series quickly installed coal fired steam boiler is the most advanced water-fire tube boiler in Chinese market, This series boiler can be used in textile, food and package factory with high efficiency, small in size and long working life.
The coal fired steam boiler after improvement takes use of structure of wing type smoke duct, one-way screwed smoke tube, arched tube plate, smoke and gas separate room and several other advanced technology, which has increased the water circulation speed and safety factor. This boiler series is well designed, compactly made up, quickly installed, mono layer, so that the civil engineering and investment could be saved. With these improvement, the boiler's working life extend much to be the national energy saving product.
1-6T steam boiler usally transported as entiraty part, Capacity more than 8t(including 8 t/h)are transported as up body and bottom body (chain grate) .
Boiler fuel can be applied to coal, biomass particles, sawdust, palm shell, straw and other fuels; At the same time, relevant structures shall be reasonably designed according to different fuel characteristics to ensure efficient, energy-saving and stable operation of the boiler.
1.. What are the differences between vertical type boiler and horizontal type boiler with the same capacity?
1. Structure of vertical boiler is compact, occupy a limited area,
2. Convenient on installation and removal.
3. Low cost and investment on capital construction. Steam exhausted fast and sufficient.
1. The combustion space of horizontal is big, fuel can be burned completed.
2. The thermal efficiency is higher than the vertical boiler,
3. Horizontal type: less thermal loss, stronger output, and higher steam quality.
2. What are the limitation (size, humidity, chemical element concentrations) of coal fuel/solid fuel/wood fuel?
Size requirement of coal:6-25mm
Size requirement of blending coal: <50mm (the coal less than 6mm should less than 30%)
Diameter of biomass particle: 6~10mm, length: 25~50mm, water content < 15%, ash content < 2%, sulphur content<0.07%, chlorinity <0.07%, nitrogen content < 0.5%
3. What is the size of furnace door and blower hopper?
Size of furnace door:
Standard elliptical furnace door:300*800*1500
Blower hopper size:
2 tons conical hopper: 1400*800*1500
4 tons conical hopper: 2200*1400*1500
4. What is the combustion mode of coal/biomass fired boiler?
The combustion mode of coal/biomass fired boiler is layer combustion. Place the flue on the fixed or moved grate, to form an evenly fuel bed with a certain thickness, air comes from the bottom of grate, and combustion occurred on the fuel bed.
