DHL Coal-Fired Hot Water Boiler

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  The corner tube boiler uses a piping system as the skeleton of the entire boiler, and it bears the full load of the boiler, which makes a non-framework boiler. At the same time, this skeleton also serves as the down tube of the boiler and upper and lower headers. The boiler drum is an external type drum, the furnace is a fully enclosed membrane wall structure, the convective heating surface adopts the flag structure. The corner boiler has the advantages of compact structure, low steel consumption and rapid temperature increase, which makes the boiler very popular. The boiler is field assembled boiler.

  • Parameter
  • Characteristics
  • System flow chart
  • Related Case


Item

Model
DHL29-1.25/130/70-A DHL46-1.6/150/90-A DHL58-1.6/150/90-A DHL70-1.6/150/90-A
额定热功率(MW)
Rated thermal power
29 46 58 70
额定工作压力(MPa)
Rated working pressure
1.25 1.6 1.6 1.6
额定出口水温度(℃)
Rated output water temperature
130 150 150 150
额定进水口温度(℃)
Rated imported water temperature
70 90 90 90

受热面积(㎡)
Heating area
本体
Boiler Proper
915 1631 1983 2345
炉排面积(㎡)
Effective area of great
35.7 58.5 71.6 90.0
适用燃料
Available Fuel
设计煤种
Designed coal
AⅡ AⅡ AⅡ AⅡ
应用基底位发热值(KJ/KG)
Low heating value
17700 17700 17700 17700

01

Safe water circulation
The boiler adopts a unique water circulation structure, the drum is free from heat and the heated water flows in one direction. In the event of a power outage, the water system does not vaporize and the water circulation is safe and reliable.Safe water circulation

02

Anti-seismic Structure
Corner tube boiler adopts non-framework structure, body weight is supported by membrane water wall and down tube, and all membrane walls are all welded into one whole, with good anti-seismicity.Anti-seismic Structure

03

Complete sealed structure
All around the boiler body is made of welded membrane water walls, and the steel structure is completely sealed to prevent the occurrence of air leakage. The upper part of the boiler can be divided according to the size of the railway transportation limit. The excess air coefficient after the heating surface of the boiler tail is only less than 1.2, which not only reduces the heat loss of the exhaust fumes, reduces the power consumption of the induced draft fan, but also greatly reduces the environmental pollution of the boiler house.Complete sealed structure

04

High-efficiency combustion and energy-saving
  • Equal pressure storehouse send the wind,microzone adjust the wind,reduce the amount of containing carbon of slag.
  • Wide coal furnace arch design,improve temperature and improve overall combustion efficiency.
  • Design of secondary air turbulence,reduce incomplete combustion of gas losses and fly ash loss.
  • High temperature separation of fly ash + inner circulating fluidized reburning to reduce containiing carbon of fly ash.
  • High-efficiency combustion and energy-saving

    05

    Low emission
    Low temperature separation of fly ash to reduce the initial concentration of dust emissions.Low emission

    06

    07

    08

    DHL Coal-Fired Hot Water Boiler-System flow chart

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