DZL horizontal chain biomass pellet steam boiler is a horizontal
three-pass water and fire tube hybrid boiler, with a bunch of
threaded smoke tubes arranged in the drum. The left and right sides
of the furnace are equipped with light pipe water-cooled walls. It
adopts light chain grate to realize mechanical feeding, equipped
with blower and induced draft fan for mechanical ventilation, and
equipped with scraper type slag discharger to realize automatic
slag discharge. The front and rear arches of the furnace adopt a
new type of energy-saving technology arches. The fuel falls from
the hopper to the grate, and after entering the furnace to burn,
the flame refracts upwards through the back arch and turns upwards
through the combustion chambers on both sides of the body to the
front smoke box, and then folds back from the front smoke box to
the tube bundle in the pot, and enters through the rear smoke box.
The economizer is then drawn by the induced draft fan through the
flue to the chimney and discharged to the atmosphere.
Technical Specification
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
(℃) | 170/184/194 | 194/204 |
Feed water Temperature(℃) | 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 |
Exhaust Gas Temperature(℃) | 135-145 |
Thermal Efficiency (%) | 83-85 |
Weight of Biggest Part for Transportation(t) | 17 | 23 | 25 | 35 | 45 | 33(Up Part)
28(Down Part) | 50(Up Part)
28(Down Part) |
Overall Dimension of Boiler Assembled
L*W*H(m) | 5.1×2.2×3 | 5.5×2.3×3.3 | 6.6×2.6×3.6 | 7.5×2.9×3.8 | 8.1×3.1×3.8 | 7.7×3.2×3.6
8.6×3.0×2.6 | 11×3.24×3.54
14×3.2×3.08 |
Performance advantage
1. The boiler type is a horizontal quick-installed boiler with
natural circulation of working fluid.
The boiler heat exchange system consists of a boiler drum, left and
right headers, and a water wall. The main heating surface has a
furnace water wall, part of the boiler drum and the convection tube
bundle in the drum.
2. Advanced design performance:
The main heating surface tube of the boiler is made of seamless
steel pipe for 20# low and medium pressure boiler, and the boiler
drum is made of special steel plate for boiler. The left and right
headers are made of seamless steel pipes.
3. The boiler arch is made of refractory concrete. The back arch is
low and long, so it burns well. The two wings flue and side wall
bricks are made of refractory sintered bricks. The front and back
walls of the boiler are made of universal refractory bricks.
4. The fire grate has reasonable air distribution, large combustion
chamber and strong coal type applicability. It is suitable for
biomass particles, various bituminous coals or anthracites, and
mixed coals. Burns well. Because the high-temperature flue gas
first enters the settling chamber, and then enters the two-wing
flue and front smoke box from both sides, the smoke and dust
removal effect is good.
5. The water circulation is simple, the structure of the pressure
parts is reasonable, and it can be operated safely under the
condition of ensuring the water quality.
6. The combustion equipment is a quick-installed grate. The
combustion equipment is manufactured and installed in the factory,
and can be directly installed on the foundation after being
transported to the construction site. It has a reasonable and
compact structure and low steel consumption, which makes the boiler
performance, weight, and structure size more advanced than domestic
products with the same capacity.
7. Energy saving and environmental protection: Adopting new
gasification combustion technology, equipped with advanced
gasification rotating combustion chamber, built-in swirling
secondary air distribution, so that fuel combustion is more
complete.
8. The use of high-efficiency heat transfer elements-threaded smoke
pipes, with a reasonable flow rate of flue gas, makes the boiler
more efficient. The thermal efficiency is as high as over 85%.
9. The boiler adopts the popularized green and renewable biomass
wood pellet fuel, CO2 achieves zero emission, the smoke and dust
emission concentration is less than 50mg/m3, the smoke density is
less than Ringelmann I, and all indicators meet the first-class
regional environmental protection standards.
10. Low operating cost: Because the wood biomass pellets used in
the boiler itself are a new type of environmentally friendly fuel
that is promoted, it is a renewable resource. It has the
characteristics of high calorific value, low cost and wide sources.
Its operating cost is only one quarter of that of electric boilers,
and less than one-half of oil (gas) boilers.
11. High degree of automation: The digital integrated controller
can set the combustion conditions of the automatic controller
according to the user. The operation is simple and convenient,
automatic ignition, automatic feeding, automatic dust removal, and
the operation of gas boiler is equally convenient.
FAQ of coal steam 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.
