DZL Series chain grate wood fired boiler is drum boiler with both water tubes and fire tubes, the combustion equipment is chain grate (small scale flaker is available), has the advantages of feed mechanically, strong adaptability of different fuels, low coal leakage, and convenient maintenance. The solid fuel includes coal, wood chips, rice hull, bagasse, straw, peanut shell, mustard stalk, cotton stalk, coconut shell, and waste cloth, etc. The source of solid biomass fuel is widespread, it is renewable green energy with the advantages of low cost, environmental friendly (sulfur content<0.06%, and zero CO2 emission), energy saving, and high combustion efficiency (>90%). 

This chain grate wood fired boiler uses the new scientific achievement, such as arch tube plate, and spirally corrugated tubes to solve the problem of low thermal efficiency, coking, tube plate cracking, drum bulging, insufficient output, and environmental pollution. Sitong Boiler has a mature R&D and design team, could customize the boilers based on customers’ requirement. 

Application:

DZL chain grate wood fired steam boiler is widely used in industries, such as chemical industry, textile plant, rice mill, garment factory, utility or power plant, hospital, hotel, food & beverage, diaries, schools, chemical industry and many other applications. Hot water is usually used in farm, hotel, school, hotel, gym, etc.

Performance Advantages

1. Excellent chain grate

1) The small scale chain grate boiler could resist the temperature as high as 1200℃, long working life.

2) The small flake type grate with very small gap to reduce the leakage rate.

3) High automatic degree, decrease labor cost.

4) Convenient for maintenance, it could be done without boiler shut down.

5)  For the solid fuels with high humility, increase the length of preheating section of chain grate, to dry the fuels before burning, increase combustion efficiency.

 

2. High thermal efficiency

1) The spirally corrugated tube strengthen the heat transfer, improve thermal efficiency. The flue gas has the foundation of disturbance, avoid ash depositing in tube.

2) The furnace wall was poured entirely by the heat-resistance concrete and high-temperature-resistance refractory brick, and the boiler shell use aluminium silicate board for heat preservation, low heat loss.

3) Equipped with economizer, make full use of the heat of flue gas, decrease the exhaust smoke temperature, increase thermal efficiency.

 

3. Anti coking

1) For the easy coking biomass fuels, increase the size of furnace, large space to achieve sufficient combustion.

2) Adopts unique secondary air design, improves the ignition condition of biomass fuel, sufficient air supply to make sure the high combustion efficiency.

 

4. Avoid bulging

The riser tube bundle under the drum, remove the dead water region at the bottom of drum, sludge is not easy for depositing, the high temperature area of drum has better cooling, prevent bulging.

 

5. Avoid tube plate cracking

1) The boiler adopts arched tube plate and spirally corrugated tube, change the quasi-steel body into quasi-elastic body structure, reduce stress, solves the problems of tube plate cracking.

2) Arrange two sides gas duct in drum, the smoke gas could enter into the front smoke chamber smoothly, the temperature of tube plate is lower than 600℃, avoid cracking leaded by high temperature.

6. Sufficient output

Adopts horizontal type three pass structure and large furnace, to ensure the sufficient combustion, and the boiler could absorb the thermal expansion effectively. The large diameter boiler drum increases the radiant heating surface, to ensure the sufficient output.

 

7. Environmental protection

1) Both wing wall and outlet widow inside of the furnace have the function of dust suppression,that make the original dust concentration decrease. 

2) Will equip with dust collector, particulate matter in the smoke gas also will be reduced before chimney.

Parameter

Steam Boiler

Model	Rated evaporation capacity(t/h)	Rated pressure (MPa)	Thermal efficiency  (%)	Fuel consumption   (kg/h)	Overall Dimension  L×W×H (mm)	Weight  (ton)
DZL1-0.7/1.0/1.25-T	1	0.7/1.0/1.25	82	~200	5100×2200×3000	17
DZL2-0.7/1.0/1.25-T	2	0.7/1.0/1.25	82	~400	5500×2300×3300	23
DZL4-1.25/1.6-T	4	1.25/1.6	82	~800	6600×2600×3600	25
DZL6-1.25/1.6-T	6	1.25/1.6	82	~1200	8200×2900×3800	40
DZL8-1.25/1.6-T	8	1.25/1.6	82	~1600	8100×3100×3800	53
DZL10-1.25/1.6-T	10	1.25/1.6	82	~2010	Up 7700×3200×3600  Down 8600×3200×6735	72
Note: 1. Parameter is for reference only, if any changes should follow the factory technical data.   2. Our company can design boiler products based on customers’ requirement and different biomass fuels.

Hot Water Boiler

Model	Rated power   (MW)	Rated pressure   (Mpa)	Supply water Temperature  (℃)	Return water temperature (℃)	Thermal Efficiency  (%)	Overall dimension  L×W×H (mm)	Weight   (t)
DZL0.7-0.7/95/70	0.7	0.7	95	70	82	5.1x2.2x3	17
DZL1.4-0.7/95/70	1.4	0.7	95	70	82	5.5x2.3x3.3	23
DZL2.8-1.0/95/70	2.8	1.0	95	70	82	6.6x2.6x3.6	25
DZL4.2-1.0/95/70	4.2	1.0	95	70	82	7.5x2.9x3.8	35
DZL5.6-1.25/95/70	5.6	1.0	95	70	82	8.1x3.1x3.8	45
Note: 1. Parameter is for reference only, if any changes should follow the factory technical data.   2. Our company can design boiler products based on customers’ requirement and different biomass fuels.

1. Excellent chain grate

1) The small scale chain grate boiler could resist the temperature as high as 1200℃, long working life.

2) The small flake type grate with very small gap to reduce the leakage rate.

3) High automatic degree, decrease labor cost.

4) Convenient for maintenance, it could be done without boiler shut down.

5)  For the solid fuels with high humility, increase the length of preheating section of chain grate, to dry the fuels before burning, increase combustion efficiency.

 

2. High thermal efficiency

1) The spirally corrugated tube strengthen the heat transfer, improve thermal efficiency. The flue gas has the foundation of disturbance, avoid ash depositing in tube.

2) The furnace wall was poured entirely by the heat-resistance concrete and high-temperature-resistance refractory brick, and the boiler shell use aluminium silicate board for heat preservation, low heat loss.

3) Equipped with economizer, make full use of the heat of flue gas, decrease the exhaust smoke temperature, increase thermal efficiency.

 

3. Anti coking

1) For the easy coking biomass fuels, increase the size of furnace, large space to achieve sufficient combustion.

2) Adopts unique secondary air design, improves the ignition condition of biomass fuel, sufficient air supply to make sure the high combustion efficiency.

 

4. Avoid bulging

The riser tube bundle under the drum, remove the dead water region at the bottom of drum, sludge is not easy for depositing, the high temperature area of drum has better cooling, prevent bulging.

 

5. Avoid tube plate cracking

1) The boiler adopts arched tube plate and spirally corrugated tube, change the quasi-steel body into quasi-elastic body structure, reduce stress, solves the problems of tube plate cracking.

2) Arrange two sides gas duct in drum, the smoke gas could enter into the front smoke chamber smoothly, the temperature of tube plate is lower than 600℃, avoid cracking leaded by high temperature.

6. Sufficient output

Adopts horizontal type three pass structure and large furnace, to ensure the sufficient combustion, and the boiler could absorb the thermal expansion effectively. The large diameter boiler drum increases the radiant heating surface, to ensure the sufficient output.

 

7. Environmental protection

1) Both wing wall and outlet widow inside of the furnace have the function of dust suppression,that make the original dust concentration decrease. 

2) Will equip with dust collector, particulate matter in the smoke gas also will be reduced before chimney.

Steam Boiler

Model	Rated evaporation capacity(t/h)	Rated pressure (MPa)	Thermal efficiency  (%)	Fuel consumption   (kg/h)	Overall Dimension  L×W×H (mm)	Weight  (ton)
DZL1-0.7/1.0/1.25-T	1	0.7/1.0/1.25	82	~200	5100×2200×3000	17
DZL2-0.7/1.0/1.25-T	2	0.7/1.0/1.25	82	~400	5500×2300×3300	23
DZL4-1.25/1.6-T	4	1.25/1.6	82	~800	6600×2600×3600	25
DZL6-1.25/1.6-T	6	1.25/1.6	82	~1200	8200×2900×3800	40
DZL8-1.25/1.6-T	8	1.25/1.6	82	~1600	8100×3100×3800	53
DZL10-1.25/1.6-T	10	1.25/1.6	82	~2010	Up 7700×3200×3600  Down 8600×3200×6735	72
Note: 1. Parameter is for reference only, if any changes should follow the factory technical data.   2. Our company can design boiler products based on customers’ requirement and different biomass fuels.

Hot water boiler

Model	Rated power   (MW)	Rated pressure   (Mpa)	Supply water Temperature  (℃)	Return water temperature (℃)	Thermal Efficiency  (%)	Overall dimension  L×W×H (mm)	Weight   (t)
DZL0.7-0.7/95/70	0.7	0.7	95	70	82	5.1x2.2x3	17
DZL1.4-0.7/95/70	1.4	0.7	95	70	82	5.5x2.3x3.3	23
DZL2.8-1.0/95/70	2.8	1.0	95	70	82	6.6x2.6x3.6	25
DZL4.2-1.0/95/70	4.2	1.0	95	70	82	7.5x2.9x3.8	35
DZL5.6-1.25/95/70	5.6	1.0	95	70	82	8.1x3.1x3.8	45
Note: 1. Parameter is for reference only, if any changes should follow the factory technical data.   2. Our company can design boiler products based on customers’ requirement and different biomass fuels.

Transaction Process

PRE-SALE SERVICE

1) 24 hours customer service hot line, we will offer you professional technical data, suggestion, and purchase guidance.

2) Welcome to visit our factory, we could offer you free airport pick up service, and help you book hotel, tickets, or plan route, etc.

ON-SALE SERVICE

Our professional engineering team will customize the boiler based on your requirement. Also, we could help arrange the boiler room and offer appropriate energy utilization plan, to maximum boiler users’ profit. Sitong Boiler cooperates with experienced transportation agency, to ensure the products arrive to destination intactly. We have overseas installation team for door to door installation, debugging, and periodic maintenance.

Process

customer inquiry -- professional consulting service, customize boiler based on requirement -- place order and pay deposit -- boiler manufacturing -- pay balance -- delivery -- installation, debugging and periodic maintenance

AFTER-SALE SERVICE

1) Offer lifelong door - to - door after sale service and quarterly visiting. We have professional overseas engineering team and overseas agencies, to solve users’ problems during boiler operation

2) 24 months warranty period, if boiler body or accessories are damaged under proper operation, Sitong boiler will maintenance or replace the damaged accessories for free (except spare parts).

3) 24 hours service hot-line, offer proper solutions to solve the problems happened during operation.