15 Ton Low Pressure Biomass Pellet Coal Fired Steam Boiler For Plywood Hot Press Machine

DZL seires coal/biomass fired steam boiler realizes almost zero pollution with the use of special dust collector solution (bag dust collector, double towers desulfurization, etc.). This series boiler is single drum horizontal type shell boiler, the combustion equipment is chain grate (small scale flaker is available), has the advantages of feed mechanically and strong adaptability of different fuels. The fuel could be II class bituminous coal, the diameter should be 6-25mm, and ash content should be less than 32.4%. Otherwise, DZL series boiler could also burn biomass fuel, including wood, straw, bagasse, rice husk, coconut shell, cotton seeds, peanut shell, etc.

1.Model:DZL Chain Grate Wood Biomass Coal Fired Steam Boiler

2.Capacity:1 ton/h to 20 ton/h

3.Design pressure:

1.0Mpa(10bar/10kg/145psi), 1.25Mpa(13bar/13kg/180psi), 1.6Mpa(16bar/16kg/232psi), 2.5Mpa(25bar/25kg/362psi),

4.Stem temperature:184℃,194℃,205℃,226℃,etc

5.Design fuel:coal,biomass,palm oil shell,wood chips,biomass pellet,firewood, cashew nut, rice husk,solid fuel,etc

Coal 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.

Technical Parameters

Technical characteristics

Economic operation

This series of industrial steam boilers can operate normally under 70%～100% load. Under operating conditions, the parameters include feed water temperature, steam pressure, fuel consumption, fuel type, steam temperature, boiler evaporation, steel consumption, efficiency and exhaust gas temperature. (For specific values, see the boiler specification table in the general drawing).

Delivery standards

(1) This series of steam boilers below 6 tons are delivered as a whole package, and the main engine and combustion equipment of boilers larger than 6 tons are delivered separately and assembled on site.

(2) Blowers, induced draft fans, slag removers, dust collectors, economizers, electric control consoles, platform escalators, valves, instruments, flue ducts, etc. shall be delivered according to the drawings or according to the contract.

(3) Provide two copies of technical documents and random drawings, and one product quality certificate.

Boiler Picture

Quality Inspection

Strength calculation report with applied materials information;

100% NDT(non-destructive inspection) report of steel plate, tube and welding rod;

100% X-ray inspection report (welding seam): to ensure the quality of the entire boiler;

Hydraulic test report: ensure the standard working pressure and safety;

Third-party inspection report: by Zhoukou Institute of Special Equipment Inspection & Technical Research (China official).

Application scope:

This steam boiler is used for producing desired steam for manufacturing process in the weave factory, printing and dyeing, papermaking and other industry like: food, rubber, plastic, chemical, pharmaceutical, etc, and for heating room and bath in factories, departments, hotels, schools, restaurants, services industries etc.

FAQ of coal fired boiler

1.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

2.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.

3.Material of boiler drum / steel plate / tube.

Boiler drum material: Q245R,carbon steel, executive standard: GB713-2008
Tube material: 20# seamless steel pipe, carbon steel, executive standard: GB3087-2008
Still kettle material: Q345R, alloy steel, executive standard: GB713-2008

4.What is the height of chimney?

The chimney is usually 30m, irrespective of the special circumstances.

5.What are the heat-resistance temperature of grate and furnace?

The heat resistance temperature of grate is related to the grate material, the highest temperature could be as high as 1100℃, and the lower temperature could be 700℃.

6.What is the temperature of smoke gas?

The highest temperature of smoke gas is 165℃.

7.How long can the coal/biomass fired boiler works?

Coal/biomass boilers could work for 10~15 years, under correct operation, high water and coal quality, etc.

8.How to avoid collapse of bricks, and what should be done if it happened?

When boiler installation finished, drying the boiler according to the manual, it’s very important to avoid collapse of bricks.

9.How many stokers do I need for one boiler?

Usually 3 person, every 8 hours a shift.