1.25mpa 6ton 8ton 10ton 12 Ton Industrial Coal Fired Boiler For Steam, Hot Water

1.25mpa 6ton 8ton 10ton12 Ton Industrial Coal Fired Boiler For Steam, Hot Water

The new DZL series coal fired boiler is a single-drum vertical water-fire tube shell boiler, and the combustion equipment is a chain grate. The water walls on the left and right sides of the furnace are radiant heating surfaces, the two wings of the furnace are convective heating surfaces, and the convection heating surfaces of threaded smoke pipes are arranged in the drum. Shield shell.

This series of coal fired steam boilers use the latest scientific research results, such as: arched tube sheet, threaded smoke tube, etc., to solve the problems of shell-type boiler tube sheet cracks, bulging at the bottom of the drum, tube bursts on the water wall, low thermal efficiency, and insufficient output.

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
Application:Rice mill,sugar mill, wood processing, textile mill, food industry, chemical plant 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

1. Reasonable heat surface and burning device, heat efficiency is 4%～5% higher than national standard.

2. Reasonable flue gas speed, heating surface without ash deposition and no abrasion, under the condition of no soot-blowing, the boiler can work full-load, high-efficiency and safety in long term.

3. The big and tall boiler furnace can be designed according to the different fuel to improve the burning rate of fuel and remove black smoke.

4. All independent loop and reasonable coal boiler injected circulation are specially designed and adopted for the hot water boilers. The medium speed in loop of heat surface is higher than national standard

5. 1-20T/H & 0.7-14MW boiler adopt big and high strength grate, add rolling device improves the boilers’ safety, lessen coal leakage and adjust burning conveniently.

6. Over 20T/H & 14MW boiler adopt flake type or beam type chain grate, less coal leakage, convenient burning adjustment. Closed soot cleaning avoid second pollution and save time and labor.

7. Dust inertia separation at the furnace outlet can reduce exhaust gas concentration and lessen abrasion of rear heat surface.

8. Compact structure makes its installation volume smaller than other types of boilers, it will shorten installation period and lower boiler room cost.

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.