Manual Operation Type Wood Burning Steam Boiler For Wood Processing Plant

Manual Operation Type Biomass Wood Chips Pellet Coal Fired Steam Boiler for Wood Processing plant

DZH horizontal steam boiler is a horizontal three-return water-fire tube hybrid boiler with threaded smoke pipe arranged in the boiler barrel.The left and right sides of the furnace are equipped with light tube water-cooling wall.Using light mobile grate, manual feeding, equipped with blower, induced fan for mechanical ventilation.The front and rear arch of the furnace adopts a new energy-saving technology.After the fuel is scattered on the grate and burned in the furnace, the flame passes through the rear arch refraction and turns upward to the front smoke box through the burnout chamber on both sides of the body. Then, the front smoke box folds back to the inner tube of the boiler, and enters the economizer through the rear smoke box. Then, it is pumped by the induced fan and discharged to the atmosphere through the flue to the chimney.

1. Model:DZH

2. Steam Capacity: 500kg/hr-4ton/hr

3. Design pressure:0.7Mpa(7bar), 1.0Mpa(10bar), 1.25Mpa(13bar),1.6Mpa(16bar)

4. Stem temperature: 184 °c,194°c, 204°c

5. Design fuel: Biomass pellet,wood sawdust, bamboo chip, wood block, straw

6. Structure: horizontal water-fire tube, single drum

7. Type: DZH manual coal feed type coal fried boiler

8. Application: 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

Structure 

Combustion process:

The fuel enters the furnace and burns on the grate. The flue gas from the production enters the convection tube bundle on both wings along the bottom of the boiler barrel through the smoke outlet on the middle partition wall, enters the threaded smoke pipe through the front smoke box, passes through the dust collector, and is pumped and discharged into the atmosphere through the chimney by the induced draft fan.

Technical characteristics

11. High Thermal Efficiency
1.1 The spirally corrugated tube strengthen the heat transfer, improve thermal efficiency. The flue gas has the foundation of disturbance, avoid ash depositing in tube.
1.2 The furnace wall was poured entirely by the heat-resistance concrete and high-temperature-resistance refractory brick, and the boiler shell uses aluminium silicate board for heat preservation, low heat loss.
1.3 Equip with economizer, make full use of the heat of flue gas, decrease the exhaust smoke temperature, increase thermal efficiency.

2. Anti-coking
2.1 For the easy coking biomass fuels, increase the size of furnace, large space to achieve sufficient combustion.
2.2 Adopt unique double secondary air design, improve the ignition condition of biomass fuels, sufficient air supply to make sure the high combustion efficiency.

3. 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.

4. Avoid Tube Plate Cracking
4.1 The boiler adopt arched tube plate and spirally corrugated tube, change the quasi-steel body into quasi-elastic body structure, reduce stress.
4.2 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.

5. Sufficient Output
Adopt 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 increase the radiant heating surface, to ensure the sufficient output.

6. Environmental Protection
6.1 The biomass fuels do not content sulfur, do not pollute the environment, and the cost of biomass fuels are low.
6.2 The splayed wall and smoke outlet have the function of dust removal, decrease the concentration of smoke emission.