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boiler flue gas exhaust temperature

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.

Flue-gas stack - Wikiped

A flue-gas stack, also known as a smoke stack, chimney stack or simply as a stack, is a type of chimney, a vertical pipe, channel or similar structure through which combustion product gases called flue gases are exhausted to the outside air. Flue gases are produced when coal, oil, natural gas, wood or any other fuel is combusted in an industrial furnace, a power plant's steam-generating boiler

Flue Gas Exhaust Thermometer - Controlled Combusti

A flue gas exhaust thermometer should be installed near the base of the breeching near the boiler, to monitor the outgoing temperature of flue gasses. High flue gas temperature is typically an indication of soot build-up in the fireside of the boiler that causes reduced boiler efficiency, corrosion failure of steel, reduced heat transfer rates

HIGH FLUE GAS TEMPERATURE - Boiler and Pressure Vess

Nov 15, 2004· re: high flue gas temperature combustionman (Mechanical) 4 Nov 04 13:59 Four pass firetube boilers that utilize a refractory shelf for the chaning flue gas direction (like Cleaver Brooks boilers) can fail cuasing a short circuiting affect that will affect boiler output and increase stack temperature.

Flue Gas Temperature and Heat in the Flue Gas Flow (B

The flue gas temperature can be determine in this case by an iterative process of inputting the flue gas mass flows and an assumed flue gas temperature to see if the Total Flue Gas Btu/hr is equal to 21,194.31 Btu/hour, if not you try another assumed temperature.

30 questions with answers in FLUE GASES | Science top

Mar 01, 2020· Flue gases - Science topic. steam from 100 degC to 450 degC by passing the flue gases with inlet temperature of 1200 degC and outlet temperature should …

What is a safe flue temp? What is too hot? | Hearth.c

Jan 06, 2014· The surface readings will be about 30-50% cooler than the actual flue gas temps. That is why the range scales on a stove pipe thermometer start saying "Overfire" or "Too hot" starting around 500F. Try to keep the surface flue temps between 250 and 400 during the peak of the burn cycle. Once the fire is at the coal only stage it's ok if the

Flue Gas Temperatures and PVC Venting - Cause for Conce

The high temperature of flue gases is a major concern to me due to the fact that Schedule 40 PVC pipe and fittings are only rated for 140 degrees Fahrenheit. I think we, in New England, are going to see PVC failures in the near future, directly related to the high flue gas temperatures of …

Is PVC an acceptable vent material for flue gase

A temperature sensor or probe with a high-limit control could be inserted into the flue at the flue connection to the boiler or water heater. This control would shut off the burner if the flue gas temperature exceeds the temperature rating of the flue pipe. A standard will be needed for plastic flue pipes that should include a temperature gauge

Flue Temperature - an overview | ScienceDirect Topi

A flue gas analysis of a gas-fired boiler indicates that the CO 2 content is 8% with a gas flue temperature of 204°C (400°F). Determine the overall thermal efficiency of the boiler. Solution. By reading the monograph of Fig. 8.12, the combustion occurs with an excess air of 48% and excess O 2 of 7%. The overall boiler thermal efficiency is

Low Temperature Corrosion in Boiler and Its Preventi

Condensation of these acids results in metal wastage and boiler tube failure, air preheater corrosion, and flue gas duct corrosion. In order to avoid or reduce the cold end corrosion the gas temperature leaving the heat transfer surface in boiler is kept around 150 degrees centigrade, ranging from 120 to 155.

Technical advice on boiler combustion contr

The flue-gas temperature of a typical boiler could be anywhere in the range of 300 to 500 degrees Fahrenheit range. As a result, the extra oxygen could have …

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