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thermal modelling of boiler convective heat superheater

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.

Steam Boiler: Requirement Design of Superheat

The requirement design of superheater will be better to establish before manufacturing process will be performed. The design superheater should provide uniform distribution of steam and temperature at all loads, and provides thermal expansion of headers, tubes, spacers and supports, and should be accessible for cleaning, examination and removal of elements.

Coupled simulation and validation of a utility-sca

The current paper presents the development, use and validation of a steady-state coupled modelling methodology that employs the 3D FVM to solve the combustion and heat transfer (convective and radiative) of the boiler flue gas side, and a 1D FVM approach to model the steam side flow and heat transfer of a radiant superheater.

Steam superheater modeling - The Society for Modelling a

Author: Chin Chen boiler. The proposed model is simple and transparent, its identification is not demanding. According to the validation result, the model is suitable to test superheater control structures on it. Nomenclature T temperature, K A surface area, m2 V volume, m3 m mass, kg ρ density, kg/ m3 c specific heat, kJ/(kg·K) h enthalpy, kJ/kg Q heat flow, kJ/s

MODELLING OF STEAM TEMPERATURE DYNAMICS OF A

File Size: 384KB CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The paper presents a MISO Wiener-Hammerstein cascade model describing the thermal process of a single steam superheater stage. The non-linear static part is based on the energy balance of the medias involved in the process. The linear part involves the time dependence of the process.

Modelling of steam temperature dynamics of a superheat

Author: Marcin Trojan In the Benson type boiler a certain part of the boiler can act as an evaporator or superheater depending on the boiler load. This set challenges to the modelling work, because heat transfer and

What is the different between radiant and convecti

Apr 04, 2018· Interesting question. I’ll try to explain easily. “Radiant” superheaters are those heated by directed flame radiation. They are also heated by flowing gas through them, mainly by convection, but also, to a minor extent, by radiation at short lengt

Superheater - Wikiped

A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. Superheated steam is used in steam turbines for electricity generation, steam engines, and in processes such as steam reforming.There are three types of superheaters: radiant, convection, and separately fired. A superheater can vary in size from a few tens of feet to several hundred feet

Convection Superheater Coils Steam Superheater A

Function . Superheater is to increase the temperature of the steam above its saturation point.. Reheater is basically a superheater that superheats steam exiting the high-pressure stage of a turbine. The reheated steam is then sent to the low-pressure stage of the turbine. By reheating steam between high-pressure and low-pressure turbine it is possible to increase the electrical efficiency of

Two-dimensional modelling of deposits formation on plat

Author: Ryno Laubscher, Pieter Rousseau Mathematical modelling of deposits formation during coal-fired boilers operation should provide answers to practical questions: size of deposits, physical and chemical composition, thermal conductivity. This information allows then the calculation of the abatement of heat transfer coefficient from the combustion gas to the fluid in tubes.

(PDF) Computer modeling of a convective steam superheat

Computer modeling of a convective steam superheater. It is very difficult to design the boiler superheater correctly. This results, on the one The basis for the modelling of thermal and

Superheaters and Reheate

of boiler that improves the thermal efficiency. In super heaters there should not be any fins as it increases the thermal stresses and carful should be taken when choosing the super-heater material that is stand for high temp and corrosion resistance. Super …

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