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Once-through steam boiler

Rated evaporation: 0.3/0.5/0.8/1.0/1.5/2.0t/h
Rated steam pressure: 1.0/1.25/1.6/2.0/2.5Mpa
Rated steam temperure: 184/194/204/215/226℃
Boiler efficiency: ≥80%
Applicable fuel: diesel,heavy oil,nature gas
Fuel consuption: diesel21~138kg/h,heavey oil23~147Kg/h,nature gas26~167Nm3/h


Once-through boiler can be divided into two types: Once-through steam boiler and once-through hot water boiler.
Once through steam boiler is a water tube boiler that the soft water passes through the membrane wall heated surface orderly, then turns to steam directly. It is composed of U shape upper and lower headers, membrane water wall, gas chamber, steam-water separator and other components.
It is small in size and takes only 3-5 minutes to start up the boiler and get the steam with preset pressure, which saves a lot of preheating cost and time.
Once-through steam boiler adopts intelligent touch screen controller with top level technology, it has the advantages of reasonable design, simple operation, good energy-saving effect,once-through water circulation technology,good steam quality, comprehensive functions, PC computer interface can achieve easy remote online management.
In order to eliminate the gap between the pipes, the design of welding rib and tube necking is adopted. Due to boiler design characteristic and gas flow method, the boiler itself also has dust cleaning function.
It can be used in Industrial areas,such as food , Pharmaceuticals, chemical industry, electronics, industrial manufacturing; civilian areas such as hospital disinfection, air conditioning humidification, hotel catering, sanitary hot water.


1. Super high efficiency
Boiler proper: Adopt self-developed cold-reducing water pipe and membrane wall which is composed of special finned tubes as well as wide threaded tubes.
Combustion mode: Adopt special reversal method.
Waste heat recovery: Equipped with high efficiency stainless steel coil condenser which to recover the waste heat of the flue gas, and recover the residual heat of the boiler proper by air preheating, the thermal efficiency is up to 98%.
2. 3-5 minutes to produce steam
The boiler is small in size and has a small amount of water. It takes only 3-5 minutes to start up the boiler and get the steam with preset pressure, which saves a lot of preheating cost and time.
3. High safety
The boiler does not have the large volume steam pocket, the structure design can eliminate the hidden danger effectively, it adopts the advanced manufacture manufacturing technique and equips with safety protection device and high quality fitting, which guarantees 100% security.
4. Special flue gas process
The flue gas is dispersed into a plurality of small streams, the flame is distributed uniformly to avoid the local overheating of the furnace chamber and the radiation heat is utilized to the maximum extent. There is no dust accumulation dead angle in the gas duct,which can prevent dust accumulation and prolong the boiler service life.
5. Air Preheating
The cold air is heated to 50-60 DEG C through the furnace interlayer and the inlet air temperature is increased,hence boiler efficiency is effectively improved.
Flue gas condensation and feed water preheating.
The high temperature flue gas and the low temperature feed water form the condensation heat exchange, thus it improves the feed water temperature and effectively utilizes the vaporization latent heat of water vapor in the flue gas and realizes the boiler efficiency to the maximization.
6. Concentrated sewage discharge function
The concentration of water in the boiler can be detected automatically, automatic sewage discharging will be carried our once it exceeds the standard, water concentration should always kept in the safe range, in order to prevent boiler fouling and steam water priming , hence prolong the long service life and ensures safety.
7. Water wall protection
Equipped with the heated surface wall sensor, detection of heated wall temperature will be performed to prevent overheating of the furnace body and ensure safety.
8. Modular operation mode
Multi sets installation instead of large capacity boiler, group control and distributed control can be realized, increase or decrease the boiler units automatically according to the load changes, "on the basis of timing,demand and amount’’ to supply required steam required, hence improves the boiler operation efficiency,so that the boiler can supply efficient, continuous and high quality steam under the best working conditions.

Technical Parameters

LSS Once Through Steam Boiler Technical Data

Boiler Item Boiler Type
LSS0.3 LSS0.5 LSS0.8 LSS1.0 LSS1.5 LSS2.0
Rated Output   t/h 0.3 0.5 0.8 1.0 1.5 2.0
Rated Steam Pressure   MPa 1.0,1.25,1.6,2.0,2.5
Steam Temperature   184,194,204,215,226
Feed Water Temperature   20
Type of Burning     On-Off Hi-Low-Off
Thermal Efficency   % >80 >90
Fuel     Diesel,Heavy Oil,Natural Gas
Fuel Consumption   Diesel
21 35 56 70 104 138
  Heavy Oil
23 38 60 75 110 147
  Natural Gas
26 43 68 86 125 167
Steam Outlet     DN32 DN40 DN40 DN50 DN65 DN65
Water Inlet     DN20 DN20 DN25 DN25 DN32 DN32
Electric power   KW 2 3 7 8 9 9
Chimney Diameter   mm φ200 φ200 φ280 φ280 φ350 φ430
Boiler Weight   t 1.6 1.7 2.5 2.9 3.7 3.9
Dimension L mm 2100 2100 2300 2300 2500 2500
W mm 1600 1600 2000 2000 2300 2300
H mm 2100 2100 2600 3000 3100 3100
HI mm 840 840 890 890 2040 2240

1.Natural gas low calorific value 8500Kcal/NM³, Naphtha low calorific valve 10000Kcal/Kg, City gas low calorific valve 4000Kcal/Nm³.
2.The data and image in the table just as your refer, Huatai reserves the right to modify the data without notify the user since the product renews unceasingly.
3.Please get in touch with us to confirm the data to prefabricate, reserve and design the boiler room.
4.It is better to install condensing heat exchanger when the fuel is natural gas.
5.It is suitable to install economizer if the fuel is naphtha.
HTS Boiler reserves the right to modify the data in above table without notify the user since the product renews unceasingly.

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