Oil Gas Boiler Coal/Biomass Fired Boiler Thermal oil Heater Electric Heating Boiler

General questions for coal boiler, biomass boiler, biomass fuel available, charcoal boiler, husk boiler, biomass pellets fired boiler, coconuts fired boiler, palm shells boiler, wood boiler, wood logs fired boiler, wood waste fired boiler, szl coal boiler, szl biomass boiler, water tube boiler, chain grate boiler, reciprocating grate boiler, travelling grate boiler, fixed grate boiler. YD Boiler has rich experience to provide customers with a full set of boiler equipment services, with excellent professional skills and positive spirit of innovation to create a world-class boiler equipment and struggle. immediately Advisory; we are dedicated to serve you!

Q:What are the spare parts for DZL/SZL series coal/biomass fired boiler?


Generally, the spare parts are instrumentation valve, grate plate, gasket, etc.

Accessories including control panel, combustion grate device, water treatment device, water pumps, dust collector, economizer, coal feeder, grate reducer, deaerator, chimney, water level gauges & pressure gauges.

Q:What difference between DZL and SZL with the same capacity?

1.Usually for the boiler with capacity lower than 10Ton
2.Easy for transportation
3.Lower request on water quality
4.Low boiler room construction charges
5.Low requirement on water quality

1.Usually suitable for bigger capacity boiler
2.Good water circulation, small water volume
3.Warm up faster, higher steam quality
4.Higher request on water quality 
5.Higher thermal efficiency

Q:What are the differences between vertical type boiler and horizontal type boiler with the same capacity?


Vertical type boiler: 

1.Structure of vertical boiler is compact, occupy a limited area.

2.Convenient on installation and removal. 

3.Low cost and investment on capital construction. Steam exhausted fast and sufficient. 

Horizontal type boiler:

1.The combustion space of horizontal is big, fuel can be burned completed. 
2.The thermal efficiency is higher than the vertical boiler, 
3.Horizontal type: less thermal loss, stronger output, and higher steam quality.

Q:What are the limitation (size, humidity, chemical element concentrations) of coal/solid fuel/wood ?

A:1. Size requirement of coal:6-25mm
2. Size requirement of blending coal: <50mm (the coal less than 6mm should less than 30%)
3. Diameter of biomass particle: 6~10mm, length: 25~50mm, water content < 15%, ash content < 2%, sulphur content<0.07%, chlorinity <0.07%, nitrogen content < 0.5%

Q:Blower hopper size:


Take example:

2 tons conical hopper: 1400*800*1500

4 tons conical hopper: 2200*1400*1500

Q:What is the combustion mode of coal/biomass fired boiler ?

A: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.

Q:Material of boiler drum / steel plate / tube

A:1. Boiler drum material: Q245R,carbon steel, executive standard: GB713-2008
2. Tube material: 20# seamless steel pipe, carbon steel, executive standard: GB3087-2008
3. Still kettle material: Q345R, alloy steel, executive standard: GB713-2008

Q:What are the heat-resistance temperature of grate and furnace ?

A: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℃.

Q:How long can the coal/biomass fired boiler works ?

A:Coal/biomass boilers could work for 15~20 years, under correct operation, high water and coal quality, etc.

Q:How to remove the ash ?

A:Clean the ash and leaked coal in ash hopper in definite time. Every shift should open the soot door at the bottom of boiler left for twice, to clean the ash deposition in the wind chamber, make sure there is no blocking.

Q:How long it takes for boiler installation and debugging ?

A:The boiler is easy to install, it could be finished within 2 weeks, we have the professional abroad installation team to help for installation. Moreover, our technicians offer after-sale service every quarter in many countries, like Philipines, Bangladesh, Indonesia, Pakistan.