SZL Series Water Tube Boiler

Coal Fired Water Tube Boiler


Product thermal capacity: 4-35 t/h, 2.8~29 MW

Working pressure: 1.0-2.5 MPA

Available fuel: Bituminous coal, lean coal, anthracite

Available industries: Heating, chemical, food, tobacco, textile, printing and dyeing, feed, medicine, building material, wine, rubber, hospital


SZL Series Water Tube Boiler Introduction

Water tube boiler refers to the boiler that water, steam or the steam-water mixture flows in the tubes, and fire or the smoke are combustion and flow outside the flues. Compared with fire tube boiler, water tube boiler has no limitation on steam capacity and pressure, so it is fit for the user who need large capacity. Moreover, coal fired water tube boiler has higher requirement for water quality and more space for superheater. Otherwise, water tube boiler good heat transfer property, high combustion efficiency, heating area can be layout at different types.

Zozen Boilers SZL series coal fired water tube boiler is the horizontal type double drum longitudinal type chain grate water tube steam boiler. Zozen Boilers inherits the domestic current mature technique of SZL assembly chain grate boiler, gains technological breakthrough on the following areas: furnace with water-cooling chamber, back-arch structure design, boiler design with low thermal inertia, seal structure on membrane wall, and contact side seal of the grate.


SZL Series Water Tube Boiler Application

Zozen Boilers coal fired water tube boiler is widely used in light textile industry, chemical engineering, printing and dyeing plant, and oil field, rice mill, garment factory, etc., moreover, it can used for heating in hotel, civil architecture, school, and it is utility for power plant.


SZL Series Water Tube Boiler Advantage

  • Whole membrane water cooling combustion chamber and inverted “α” arch furnace technology achieve high combustion efficiency, high output
  • Extended length of the grate, extended the coal burning time, improved the boiler thermal efficiency
  • Light furnace wall structure reduce heating loss, thermal inertia decrease 70%, furnace heat up fast, boiler start-up and shut down quickly
  • Flexible load adjustment
  • Anti-coking heater design, remove the side sealing steel, avoid the problem of grate stuck and uneven air distribution for combustion.
  • Adopt light rail I-beam for the rail under the grate, abrasion resistance and difficult for deformation, improve the reliability of boiler operation.


SZL Series Water Tube Boiler Parameter

Model Rated evaporation(t/h) Rated working pressure(MPa Rated steam temperature Thermal efficiency(%) Maximum transport size(m)
SZL4-1.25-AI 4 1.25 194 82.8 7.4×2.7×5.3
SZL4-1.60-AI 4 1.6 204 82.8 7.4×2.7×5.3
SZL4-2.45-AI 4 2.45 225 82.8 7.4×2.7×5.3
SZL6-1.25-AⅡ 6 1.25 194 82.8 7.0×2.7×3.5
SZL6-1.60-AⅡ 6 1.6 204 82.8 7.0×2.7×3.5
SZL6-2.45-AⅡ 6 2.45 225 82.8 7.0×2.7×3.5
SZL8-1.25-AⅡ 8 1.25 194 83.2 6.9×3.2×5.3
SZL8-1.60-AⅡ 8 1.6 204 83.2 6.9×3.2×5.3
SZL8-2.45-AⅡ 8 2.45 225 83.2 6.9×3.2×5.3
SZL10-1.25-AⅡ 10 1.25 194 83.2 7.9×3.3×3.5
SZL10-1.60-AⅡ 10 1.6 204 83.2 7.9×3.3×3.5
SZL10-2.45-AⅡ 10 2.45 225 83.2 7.9×3.3×3.5
SZL20-1.25-AⅡ 20 1.25 194 85.8 11.0×3.2×3.5
SZL20-1.60-AⅡ 20 1.6 204 85.8 11.0×3.2×3.5
SZL20-2.45-AⅡ 20 2.45 225 85.8 11.0×3.2×3.5
SZL30-1.25-AⅡ 30 1.25 194 86 9.9×3.3×3.6
SZL30-1.60-AⅡ 30 1.6 204 86 9.9×3.3×3.6
SZL30-2.45-AⅡ 30 2.45 22 5 86 9.9×3.3×3.6
SZL35-1.25-AI 35 1.25 194 82.8 8.0×3.8×3.8
SZL35-1.60-AI 35 1.6 204 82.8 8.0×3.8×3.8
SZL35-2.45-AI 35 2.45 225 82.8 8.0×3.8×3.8


Transaction Process

Customer Inquiry — Offer Professional Consulting Service — Place Order — Customize Boiler Based on Customers’ needs –Production-manufacturing — Payment — Impeccable After Sale Service (installation and debugging, periodic maintenance, etc.)


Offered Technical Documents

Installment and Operation Instruction Quality Certificate
Inspection Certificate of Boiler Quality General Drawing of Boiler
Foundation Drawing Boiler Body Drawing
Boiler Room Design Drawing Drawing of Valves, Instruments and Accessories


Company Strength

Wuxi Zozen Boilers Co., Ltd. has obtained PRC Grade A Manufacture License of Special Equipment (Boilers), Level 1 License of Special Equipment Installation, Maintenance and Retrofit, ASME “S” (Power Boilers) and “U” (Pressure Vessels) stamps, PRC Grade BRⅡ Manufacture License of Special Equipment (Pressure Vessels),and has obtained ISO 9001:2000, ISO 14001:2004, OHSAS 18001: 2007 certifications. With registered capital of RMB 127 million and a floor space of ​​180,000 square meters, ZOZEN has 420 employees, including 110 professional technicians. The annual production capacity of ZOZEN is 12,000 tons of steam. In 2019, the income of main business was RMB 802 million, and the annual export rate reached 30%.