HOME>PRODUCTS>Coal Fired Boiler>


SZL Series Coal Fired Water Tube Boiler

Rated Capacity : 2~30t/h, 1.4~21 MW
Pressure : 0.4~2.5MPa
Certificate : ISO9001, CE, BV, SGS, ASME
Fuel : Second-class bituminous coal, Meagre coal
We're here to help :Easy ways to get the answers you need
  • Product Description
  • Parameter
  • Inquiry
Product Description
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, it 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.
Zhongding SZL series coal fired water tube boiler is the horizontal type double drum longitudinal type chain grate water tube steam boiler. Zhongding Boiler 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. This is a patent product of Zhengzhou Zhongding Boiler, the patent number is ZL 2009 2 0089355.7.

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

Steam Boiler Model SZL4-1.25 SZL6-1.25 SZL8-1.25 SZL10-1.25 SZL15-1.25 SZL20-1.25 SZL25-1.25
SZL4-1.6 SZL6-1.6 SZL8-1.6 SZL10-1.6 SZL15-1.6 SZL20-1.6 SZL25-1.6
SZL4-2.5 SZL6-2.5 SZL8-2.5 SZL10-2.5 SZL15-2.5 SZL20-2.5 SZL25-2.5
Rated Evaporation Capacity (t/h)      4 6 8 10 15 20 25
Rated Working Pressure (Mpa) 1.25/1.6/2.5 1.25/1.6/2.5 1.25/1.6/2.5 1.25/1.6/2.5 1.25/1.6/2.5 1.25/1.6/2.5 1.25/1.6/2.5
Feed Water Temperature (℃) 20 20 20 60 105 105 105
Steam Temperature(℃) 194/204/226 194/204/226 194/204/226 194/204/226 194/204/226 194/204/226 194/204/226
Body Heating Area (m2) 96.5 141.7 177 228 311 727 920
Grate Area (m2) 5.5 7.66 10.4 11.8 17.7 20.8 25.8
Combustion Method Chain Grate
Note: Parameters is for reference only, if any change should follow actual drawings

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
Zhongding Boiler is the industrial boiler professor of China, it is referred as technical innovated enterprise. The manufacturer base is located in Zhengzhou Airport Economy Zone, and covers an area of 130 thousands m2. The company owns about 800 employees, including 110 technical engineers, and about 700 sets advanced manufacturing equipment. Zhongding Boiler concentrates on the invention of high-tech and energy saving boilers, has owned more than 20 sorts national patent technologies. 


Contact us now if you have any question about our company and products. Any of your inquiry and suggestion will be highly appreciated. We will keep your information completely private.

*Name : *Tel :
*Email :
*Message :