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natural gas fire tube boiler specific heat of flue gas technical manual

Product Thermal Capacity: 1 - 20 t/h

Working Pressure: 0.7 - 2 Mpa

Available Fuel: Nature gas, coke oven gas, biogas, methanol, liquid propane gas, diesel, heavy oil, light oil, crude oil, etc.

Available Industries: Heat supplying, chemical, food, textile, printing and dyeing, cigarettes and tobacco, fodder, pharmacy, building materials, brewery, rubber, hospital etc.

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Introduction of WNS gas / oil fired steam boiler:

WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere.

Technical advantages:

1. Digitized manufacture
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.
The front and back smoke chamber plates are cut by CNC plasma cutting machine and looks tidy and beautiful.

2.Easy operation and maintenance
Fully automatically operating, with automatically adjustment and protection of burning, water level, temperature and steam pressure.

3. Longer working life
Smoke tube and tube sheet connection is expanded first to eliminate the gap between them, then adopt automatic argon arc welding to relief the stress and expand boilers working life.
Longitudinal and girth joint adopt advanced automatic submerged-arc welding for good welding quality. All longitudinal and girth joint will have 100% radiographic inspection.
Fin tube us ND steel or stainless-steel material which avoid low temperature corrosion.
Inspection procedure point is set up to guarantee the sequence of expanding and welding, avoid cracking of the tube sheet holes.

4. Less fuel consumption
High quality aluminum silicate fiber is used with fire clay insulation, to control the boiler body temperature below 45℃ to control heat lost.
Sufficient steam storage room and heating area makes boiler to generate high quality steam and high thermal power.
Condenser is added to reuse the waste heat of the exhausted smoke to increase feeding water’s temperature and reduce emission temperature, which can increase the thermal efficiency above 98% and save operating cost.

Natural Gas Fired Boile

File Size: 107KB The boiler efficiency is usually reduced to 84-85%, when a coal fired boiler is converted to natural gas. The biggest change is due to the combustion of Hydrogen. This is normally a 4% heat loss while firing coal and about a 11% heat loss while firing natural gas.

BOILER EFFICIENCY GUIDE - Cleaver-Broo

not need high maintenance, boiler tube, add-on devices if the boiler is designed for optimum flue gas velocities in the first place. Each boiler pass should be designed with a cross sectional area to achieve optimal flue gas velocity, which in turn maximizes heat transfer while also minimizing performance robbing soot build-up within the tubes.

Technical advice on boiler combustion contr

File Size: 2MB Technical advice on boiler combustion control to 18 percent for a typical natural-gas-fired boiler, to 12 percent for an oil-fired boiler, to as low as 9 percent for a coal-fired boiler. This nitrogen enters at ambient temperature and receives fuel energy to exit the boiler at flue-gas temperature.

Fire Tube Boilers - Accelerating Gas Fuel Technologi

Author: Noria Corporation Fire tube boilers are most commonly used where required steam pressures do not exceed 300 psig. III Equipment Options Fire tube boilers are often characterized by their number of passes, referring to the number of times the combustion (or flue) gases flow the length of the pressure vessel as they transfer heat to the water.

Table of Contents - Home - Johnston Boil

The Johnston boiler is a steam or hot water packaged firetube boiler, ranging in size from 50 to 2,500 horsepower, 15# to 350# design pressure, 3 or 4 pass, of welded steel construction with submerged rear combustion chamber.

Module 106: Natural gas boiler flue gas recirculation

Sep 26, 2018· Converting natural gas and air to heat and pollution . Air contains 21% O₂ and 78% N₂, and is supplied to the burner solely to provide the component O₂ that is required in the combustion process. Nitrogen plays no part in the combustion process of natural gas and would, ideally, pass through the boiler without reaction.

Fire-tube boiler - Wikiped

File Size: 296KB A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or (many) more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.. The fire-tube boiler developed as the third of the four major historical types of boilers: low

Gas Fired Residential Combi Boil

adjustments, CO levels must be monitored using a flue gas analyzer such that a CO level of no more than 400 ppm is exceeded at any time during operation. Adjusting the “low fire offset” on the gas valve in even small increments can result in a significant increase in CO concentration.

Exhaust gas heat recovery boiler - Alfa Lav

The standard Aalborg AV-6N exhaust gas boiler for steam appli-cation has a natural circulation design offering several operational advantages compared to traditional forced circulation. Aalborg AV-6N heat recovery boiler improves overall efficiency Aalborg AV-6N is the optimum solution for high-performance heat recovery systems.

WNS Series Natural Gas Fire Tube Steam Boiler - Oil/G

WNS series natural gas steam fired boiler is horizontal type fast assembly fire tube boiler with three pass structure, it has compact structure, small volume, strong load adaptability and low water quality requirement This boiler adopts wet wet back structure, it can adapt to the high temperature, has a good sealing, increase the radiation heat transfer area and improve the heat transfer

Mean specific heat of flue gas - Energy engineeri

Apr 16, 2004· I need to calculate the mean specific heat capacity of a flue gas.Problem is, the flue gas is a product of oxy-fuel combustion with CO2 as a major component and rest being H20. The temperature of the combustion system varies from 1000 to 1400°c and pressure from atmospheric to 16 bar. Can you suggest me how I can calculate it.

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