I. What Is The Preface Of Your Natural Gas Fired Steam Boiler WNS8-1.25 – Y(Q)?
To meet the environmental protection requirements & energy saving, in recent years, the demand for all forms of WNS oil gas boilers is increased.
With the continuous improvement of technology and the request, the fuel gas boiler in structure gradually matures, based on this, our company designs the type of gas fired steam boiler.
II. How Is Your Natural Gas Fired Steam Boiler Design Basis?
We total to comply with follow the design items, with an A-level gas fired steam boiler and pressure vessel license:
General Technical Conditions for Industrial Boilers JB/T10094-2002
Calculation of Strength of Pressure Components in Boiler Shell
GB1921-2004 Industrial Steam Boiler Parameters Series
Boiler Safety Technical Supervision Regulation TSGG0001-2012
GB50273-2009 Code for Construction and Acceptance of Boiler Installation Works
GB13271-2001 Boiler Atmospheric Pollutant Emission Standard
TSG G0002-2010 Boiler Energy-saving Technical Supervision and Management Regulations
GB/T1576-2008 Water Quality for Industrial Boilers
III.How To Promise A Safe And Stable Natural Gas Fired Boiler Operation?
First, you need to operate your gas fired steam boiler within the load of 80% ~ 110%.
Meanwhile, you have to promise following key parts are choosing with right parameters:
Check our natural gas steam boiler parameters, and Be sure that your fuel characteristics and water quality requirements are like the following.
(1) What Is The WNS8-1.25-YQ Natural Gas Fired Boiler Parameters?
| The serial number | project | Specification | Remark | |||
| 1 | Rated evaporation | 8 t/h | ||||
| 2 | Rated steam pressure | 1.25 MPa | ||||
| 3 | Rated steam temperature | 193 ℃ | ||||
| 4 | Feed temperature | 104 ℃ | ||||
| 5 | Condenser outlet temperature | 45 ℃ | ||||
| 6 | Emission rate | 3% | ||||
| 7 | Cold air temperature | 25 ℃ | ||||
| 8 | Design the exhaust temperature | The fuel gas | 92 ℃ | |||
| fuel | 101 ℃ | |||||
| 9 | Design of fuel | Natural gas, 0# light diesel | ||||
| 10 | Heating area | The boiler | radiation | 22.81 m2 | ||
| convection | 157.55 m2 | |||||
| The condenser | The fuel gas | 128.87 m2 | ||||
| fuel | 109.67 m2 | |||||
| 11 | Designed fuel consumption | Natural gas | 543.7 Nm3/ h. | Thermodynamic calculation | ||
| 0 # light diesel oil | 451.9 kg/h | Thermodynamic calculation | ||||
| 12 | Design boiler thermal efficiency | Natural gas | 94.4% | Thermodynamic calculation | ||
| 0 # light diesel oil | 94.2% | Thermodynamic calculation | ||||
| 13 | The burner | model | The fuel gas | GL1000LX | Burner back pressure | 0 ~ 30 mbar |
| The output power | 1500 ~ 10850 kw | |||||
| traffic | 150 ~ 1085 nm3/ h. | |||||
| Electric power | 22 kw | |||||
| fuel | GL1000DSPG | Burner back pressure | 0 ~ 21.5 mbar | |||
| The output power | 2500 ~ 10500 kw | |||||
| traffic | 212 ~ 890 kg/h | |||||
| Electric power | 26 kw | |||||
| 14 | The water pump | model | CDL8-16 | Electric power | 5.5 kW | |
| traffic | 9.6 m3/ h. | |||||
| lift | 148 m | |||||
| 15 | Excess air coefficient | 1.1 | Boiler Calculation Manual | |||
| 16 | Boiler body metal weight | 13144 kg | ||||
| 17 | Boiler metal weight | 17500 kg | ||||
| 18 | Boiler transport size (length × width × height) | 6750 * 2480 * 2986 (mm) | ||||
| 19 | The total power consumption | The fuel gas | 27.5 kW | |||
| fuel | 31.5 kW | |||||
(2) What Are Your Natural Gas Boiler Fuel Requirements?
- Gas fuel
Natural gas (China Natural Gas) composition:
| CH4 | CmH.n | H.2 | CO | CO2 | N2 | O2 | H.2s. | s. | H.2O | Qnet,v,ar |
| (%) | (%) | (%) | (%) | (%) | (%) | (%) | (mg/Nm3) | (mg/Nm3) | (mg/Nm3) | (kJ/Nm3) |
| 95 | 2.4 | 1 | 0.1 | 0.5 | 1 | 0 | 400 | 100 | 0.2 ~ 2.0 | 35588 |
- Liquid fuel (oil), propone gas fuel
0#Composition of light diesel oil:
| Car | H.ar | Oar | Nar | s.ar | a.ar | W.ar | Qnet,v,ar |
| (%) | (%) | (%) | (%) | (%) | (%) | (%) | (kJ/kg) |
| 85.55 | 13.49 | 0.66 | 0.04 | 0.25 | 0.01 | 0 | 42915 |
(3) How About Natural Gas Fired Steam Boiler Water Quality Requirements?
According to GB/T1576-2008 Water Quality for Industrial Gas Boilers
| Feedwater (softened water) | Pot water (softened water) | ||
| turbidity | 5.0 FTU or less | Total alkalinity | The tendency of 6.0 ~ 24.0 / L |
| hardness | 0.03 or less tendency for L | Phenolphthalein alkalinity | The tendency of 4.0 ~ 16.0 / L |
| PH (25 ℃) | 7.0 ~ 9.0 | PH (25 ℃) | 10.0 ~ 12.0 |
| Dissolved oxygen (do) | 0.1 mg/L or less | Dissolve solids | 3.5 x 10 or less3Mg/L |
| oil | 2.0 mg/L or less | Phosphoric acid root | 10.0 ~ 30.0 mg/L |
| All the iron | 0.3 mg/L or less | Sulfurous acid root | 10.0 ~ 30.0 mg/L |
| Conductivity (25 ℃) | 5.5 x 10 or less2 Mu s/cm | The relative basicity | < 0.2 |
IV. How About Your Natural Gas Fired Steam Boiler Structure?
(see ur 8-1-0 general drawing and body drawing for details)
WNS8-1.25-YQ is a horizontal wet back three-trip oil fired and gas fired boiler. The main pressure components of the body include tube plate, furnace bladder, return chamber, and threaded smoke pipe.
In the design of the furnace bladder, a corrugated furnace bladder is adopted. The matching between the diameter and diameter of the flame of the burner and the diameter of the flame is fully considered in the design so that it is suitable for the shape of the flame to ensure full combustion.
Moreover, the adoption of a corrugated furnace bladder not only strengthens the disturbance of flue gas but also increases the radiation heat transfer area.
It not only reduces the rigidity of the furnace liner but also effectively weakens the expansion stress of the furnace liner. The body is equipped with a 300×400 manhole, G88×102 handhole, and 426 explosion-proof inspection door, which is conducive to the safe operation and maintenance of the boiler.
In addition, the end of the gas fired steam boiler is equipped with an atmospheric pressure condenser, which can effectively make use of the waste heat of the flue gas in the rear end of the boiler.
The hot water heated by the condenser can be put into the soft water tank for the boiler, which improves the water inlet temperature of the boiler and can also be used for other living purposes.
At the same time, it can reduce the exhaust temperature of the boiler, making the boiler environmental protection and energy saving.
Note: the condenser is under normal pressure. It is strictly prohibited to use under pressure.
V. How Is Your Natural Gas Fired Steam Boiler Pressure Part’s Material?
The metal materials used for gas fired steam boiler pressure components are strictly controlled with the requirements stipulated in the <Safety Technical Supervision Regulations for Steam Boilers>:
Furnace crust 2304×14 Q245R GB713-2008
Tube plate DN2300× 16 Q245R GB713-2008
Fire box tube plate DN1400× 16 Q245R GB713-2008
Fire box 1600×20 Q245R GB713-2008
Cone 1100/ 900 =16 Q245R GB713-2008
Furnace 900×10 Q245R GB713-2008
Tobacco tube 63.5×3.5 20# GB3087-2008
Straight tie rods 35 20# GB/T699-1999
Oblique ties 40 20# GB/T699-1999
VI. Boiler Valve Instrument And Control System
The natural gas fired steam boilers furnace is equipped with two Y150 0 ~ 2.5mpa M20×1.5 accuracy grades not less than 1.5.
Proportional control burners: a (Danfoss) pressure controller, overpressure interlock, a pressure transmitter to control combustion;
There are three pressure controllers: one overpressure interlock and two combustion controllers.
Two A48Y-16C PN1.6 DN80 safety valves, the setting pressure range of which is 1.3 ~ 1.6mpa to ensure the safe operation of the boiler, the boiler flue gas outlet is equipped with a WSS-401 ≤400℃ thermometer, and there is a measuring hole for boiler flue gas analyzer. Your condenser outlet is equipped with a WSS-401 ≤200℃ thermometer to measure the boiler exhaust temperature.
The meter for measuring fuel quantity, steam flow rate, and feed water flow rate of the boiler requires that the flow meter installed by you must have the functions of indicating, integrating, and recording.
The gas steam boiler is equipped with an electronic control system, boiler safety control in line with national regulations and relevant industry standards.
In addition, the gas small steam boiler for sale economic performance indicators meet the requirements of “Boiler energy-saving technical supervision and management Regulations”.
VII. Natural Gas Fired Steam Boiler Flue Gas Flow Is As Follows:
Fuel → burner → furnace bile → back combustion chamber → first convection tube bundle → front smoke box → second convection tube bundle → rear smoke box → condenser → chimney → atmosphere.
If you are interested in our WNS8-1.25-YQ natural gas fired steam boiler, just contact us to get more information!