DZH Series Coal Fired Boiler

DZH coal fired moving grate boiler is single drum boiler with both water tube and fire tube, the combustion equipment is moving grate. Water wall tubes at left and right sides of furnace are the radiated heating area. the two wings at furnace and spirally corrugated tubes in the drum are convection heating area. This coal fired moving grate boiler uses the upper drum, water wall tube and head are in symmetrical arrangement mode. The furnace structure is in reasonable arrangement to achieve high efficiency. This moving grate boiler adopts several environmental protect measures (bag dust collector, double towers desulfurization etc.) to meet the national emission requirement. This coal fired moving grate boiler uses the new scientific achievement, such as arch tube plate, spirally corrugated tube to solve the problem of low thermal efficiency, tube plate cracking, drum bulging, insufficient output, and environmental pollution. Kingthai Boiler has a mature R&D and design team, could customize the boilers based on customers' requirement. 

Application:

DZH coal fired steam boiler is widely used for industrial production, and the hot water boiler could be used for hotel, school, laundry, gym, farm, etc.

1) Textile industry - dyeing machine, drying rooms, high temperature machine, resin setting machine.

2) Food industry - cooking, drying, vegetable oil refining.

3) Chemical industry - oil chemistry, polymer industry, reaction tanks, distillation, concentration.

4) Plastics industry - plastics fired, extruded shape.

5) Rubber industry - hot press, hot extent, extrusion, vulcanization molding, injection, etc.

6) Paper industry - drying, corrugated paper processing, calender, glue roller.

7) Wood industry - hot processing, heat setting.

8) Hotel - cooking, bathing, laundry, central heating, etc.

Other applications

Performance Advantages

1. 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, excellent leakproofness, no air leakage. Moreover, 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.

2. 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.

3. 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.

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.

4. 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.

5. Environmental protection

1) The splayed wall and smoke outlet have the function of dust removal, decrease the concentration of smoke emission.

2) The moving grate boiler adopts several environmental protect measures (bag dust collector, double towers desulfurization, etc.) to meet the national emission requirement.