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fire tube boiler wet back and dry back

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.

4 Different Designs of the Fire Tube Boiler: Which Is Best

Horizontal Return Tubular Fire Tube Boiler. As one of the oldest and most simple designs for …

Firetube Boilers - Two Pass Wet-Back (SG) - Performan

Horizontal Return Tubular Fire Tube Boiler. As one of the oldest and most simple designs for … The exhaust gases then travel from the inversion chamber through the combustion tubes and exit the boiler through the exhaust stack. The wet back design refers to water at the back of the boilers inversion chamber thus eliminating the need for refractory. Another feature is that the tubes are both expanded and welded to the tube-sheets.

Types of Boilers - Forbes Marsha

Fire tube boilers, typically have a lower initial cost, are more fuel efficient and easier to operate. Their capacities are up to 25tons/hr and 17.5 kg/ cm2. Different types of fire tube boilers: Cornish boiler. These are the earliest form of high pressure fire tube boiler.

Scotch marine boiler - Wikiped

Gases and smoke from the furnace pass to the back of the boiler, then return through the small tubes and up and out of the chimney. The ends of these multiple tubes are capped by a smokebox, outside the boiler shell. The Scotch boiler is a fire-tube boiler, in that hot flue gases pass through tubes set

BOILER BASICS AND TYPES OF BOILERS, DIFFERENC

Apr 12, 2020· boiler basics and types of boilers, water tube boiler and fire tube boiler. what is a boiler and its types, smoke tube boiler and water tube boiler. advantages and disadvantages of it. wet back design , dry back design.

Wetback -vs- Dryback — Heating Help: The Wa

A dry-back example might be an old porkchop style boiler where a refractory chamber and target brick wall is built up the back side. The advantage of a wetback boiler is greater wetted surface area compared to combustion area so more heat from the flue gasses can be absorbed.

Why Our Boilers Are Designed As Wet-Back Boilers: Dry-Ba

In general, our boilers, like the WNS gas and oil fired boiler, are designed as wet-back structure. Disadvantages of Dry-back boilers. Dry back boilers are subject to deteriorating rear refractory, leaking baffles, leaking door seals, and often found with a heat-stressed rear tube sheet.

The National Board of Boiler and Pressure Vessel Inspecto

A further subclassification of scotch boilers describes the end closure opposite the burner end of the boiler. A wet-back means the end closure is water cooled and a dry-back means the end closure is not water cooled and relies on fire brick, refractory, or a combination of both …

steam boiler which fire tube wet ba

2019-3-20 · WNS 2ton fire tube steam boiler is a three pass, smoke tube fully wet back boiler, which can fire solid fuels like coal, lignite and wood. The fuel is charged through a charging door to keep the fire going. WNS series 2ton steam boiler for sale is designed to provide low cost heating with minimum operational complexity.

Wetback vs. Dryback Firetube Boiler | CTI Controlte

The "wet" and "dry" designation indicates whether the firetubes, as they extend to the rear end of the boiler, discharge the hot gases into a reversing chamber surrounded by boiler water (wet) or partially isolated from it (dry). A dryback boiler has a rear wall lined with refractory. The rear wall forms one side of the reversing chamber on a

Firetube steam boiler -Wetand dry back configuratio

WET-BACk/DRY-BACk FIRETUBE BOILERS Models 4WI and CBLE Steam & Hot Water 100-800 HP. you look at a Cleaver-Brooks packaged boiler, think reduced cost.

Wetback Firetube Boilers - Industrial Boiler & Mechanic

The dryback boiler reversal chamber has a rear wall that is lined, or jacketed with refractory, which passes combustion gasses from the furnace to multiple tube sheets and reflects burner heat, resulting in exterior radiation losses. The dry back boiler design uses a common rear tube sheet and features convenient fire-side and water-side access.

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zhulin@zozen.com

No. 76, Xin Da Road, Zhou tie Town, Yixing, Wuxi, China

0086-510-68530066, +86-13506151292

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