Home > Products > SZL Series Coal Fired Hot Water Boiler

SZL Series Coal Fired Hot Water Boiler

Thermal Power: 2.8-2.9MW

Working Pressure: 1.0-1.25 MPA

Output Water Temperature: 95/70℃, 115/70℃

Applicable Fuel: Bituminous Coal, Lean Coal, Anthracite

Applicable Industry: Heating, Hotels, Schools, Hospitals


Installation:under engineer's guidance

Warranty:12 Month

Parameter above for reference only. Please click the button bellow to know more.

  • Product Description
  • Specification
  • Delivery
  • Description

    SZL series vertical dual drums chain grate water pipe steam and hot water boiler, adopts quick fitting and assembly structure. The 4-6t/h boiler is of quick fitting pipe structure, exit shop after completely assembled, the boiler of 6-35t/h is composed of 2 main components. The upper assembled components is the body heat accepting part, and the lower assembled component is of combustion equipment.

    The former part of the boiler body is arranged an water cooling wall, the upper part of it is connected to boiler cylinder, and its lower part is connected to collective chest, so as to form a combustion room and absorb the radiated heat from the furnace. Its rear part is arranged with dense convection pipes between upper and lower boiler cylinders. The high temperature smog after combustion shall stand for twice returning flushing transversely to the heat accepting surfaces, and shall be introduced to coal saver singly arranged, and flow into duster and exhausted from chimney in the end.

    Technical advantages

    1. The key processing technologies such as steel plate blanking, circling, drilling of drum and pipe plate are all adopt advanced CNC processing to reduce the assembly stress and prolong the service life of the boiler.

    2. Automatic production line.

    3. The welding of important parts like the vertical and circular seams of the boiler, the pipes, the inside of boiler and the flange are all adopted automated welding processes such as submerged arc welding or gas shielded welding to ensure the welding quality. All the vertical and circular seams will be done 100% radiographic inspection.

    4. The user can reasonably distribute the air according to different combustion conditions to ensure that the fuel is fully burned.

    5. Graded air supply and special furnace arch structure make the NOx emissions down to 100mg/m³.

    6. The key part such as material cutting, rolling, drilling are proceeded by advanced CNC machining process to reduce the assemble stress and extend boiler working lifetime.

    7. flutter prevention fastener is used for high temperature part convection tube, which avoid bundle tube cracking problem.

  • Product Parameters


    Rated thermal power(MW) 4.2 5.6 7.0 14 21
    Rated working pressure(MPa) 1.0 1.0/ 1.25 1.0/ 1.25 1.0/ 1.25 1.0/ 1.25
    Rated output water temperature(℃) 115 115/130 115/130 115/130 115/130
    Return water temperature(℃) 70 70 70 70 70
    Heating area(㎡) body Radiation 24.5 26.1 23.4 61.5 109.21
    Convection 119.0 184.0 227.9 346.2 549.8
    economizer(㎡) 130.8 130.8 244.16 472.0 330.4
    Effective area of great(㎡) 7.62 10.5 11.8 20.8 28.1
    Available fuel
    Biomass AII\P\
    Low heating value(KJ/kg) 21000
    Fuel consumption(kg/h) 1122 1488 1860 3600 4340
    Thermal efficiency(%) 82.8 83.2 83.2 85.8 86.0
    Weight of biggest part for transportation(t) 21 25 28 30 31
    Overall dimension of boiler assembled LxWxH(m) 7.0x2.7x3.5 6.9x3.2x5.3 7.9x3.3x3.5 11.0x3.2x3.5 9.9x3.3x3.6
    • 10.5MW SZL Series Coal-fired Hot Water Boiler Project
    • 20 tph SZL coal fired steam boiler project
    • 46 MW DHL angular pipe water heating boiler project
    • 10 tph SZL coal fired water tube boilers project

    Packaging: Boiler main part is in nude packing, accessories are in export standard wooden box;

    Container type: Flat rack and20*40 normal container based on different size boiler(model);

    Shipping price: The lowest shipping price in the market;

  • 8 Ton Three Pass Gas Steam Boiler in Pakistan Textile Mill

  • 15 Ton Condensing Gas Boiler Project

  • 8.2 MW gas fired thermal fluid heater project

  • 10 tph WNS condensing gas fired steam boiler project

  • 1.4MW WNS gas fired hot water boiler project

  • 6 tons WNS Condensing Gas Boiler Project

  • 10.5MW SZL Series Coal-fired Hot Water Boiler Project

  • 4 tons WNS condensing gas steam boiler project

Inquiry For all inquiries, please fill in the form below (* are required) to send us a brief message, and we will get back to you as soon as possible.
* Name:
* E-mail:
* Product:
  • Food industry
  • Textile industry
  • Rubber Industry
  • Dairy Industry
  • Pharmaceutical industry
  • Hospital/School/Hotel Industry
  • Chemical Industry
  • Paper Industry
  • Wind Industry
  • Heating Industry
* Message: