Concurrent Measurement of 2-D Temperature Distributions and Radiative Properties of Pulverized-coal-fired Flame in a 670 t/h Boiler Furnace

2007 ◽  
Author(s):  
Chun Lou ◽  
Huai-chun Zhou
Keyword(s):  
Pulverized Coal ◽  
Radiative Properties ◽  
Boiler Furnace ◽  
Temperature Distributions

scholarly journals Experimental study of the thermochemical treatment of the low-grade coal prior to boiler combustion at coal-fired power station

2019 ◽  
Vol 109 ◽  
pp. 00119
Author(s):  
Volodymyr Yemelianenko ◽  
Vitalii Pertsevyi ◽  
Oleksandr Zhevzhyk ◽  
Iryna Potapchuk ◽  
Oleksandr Lutai
Keyword(s):  
Experimental Study ◽  
Power Plants ◽  
Thermal Power ◽  
Thermochemical Treatment ◽  
Gas Pressure ◽  
Pulverized Coal ◽  
Time Range ◽  
Low Grade ◽  
Boiler Furnace ◽  
Coal Fuel

Analysis of the perspectives of the coal fuel for thermal power plants is carried out. The necessity of the experimental study for temperature measurement in the boiler furnace. The results of the experimental study are presented: temperature change over time at the burner outlet for different constant pressure value of the backlighting gas, dependence of the temperature at the burner outlet from the backlighting gas pressure for constant concentration value of pulverized coal in coal-air mixture, dependence of the temperature at the burner outlet from the concentration of pulverized coal in coal-air mixture for constant value of the backlighting gas pressure, temperature measurements for constant backlighting gas pressure value, constant value of the concentration of pulverized coal in coal-air mixture when plasmatron is switched and operates for some time range. The results of the study could be applied to the solid fuel treatment for different thermal units.

Numerical simulation of pulverized coal combustion in a power boiler furnace

2015 ◽  
Vol 53 (3) ◽  
pp. 445-452 ◽  
Author(s):  
A. S. Askarova ◽  
V. E. Messerle ◽  
A. B. Ustimenko ◽  
S. A. Bolegenova ◽  
V. Yu. Maximov ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Coal Combustion ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion ◽  
Boiler Furnace ◽  
Power Boiler

Numerical and experimental investigation of the influence of infrared reflective interior surfaces on building temperature distributions

2016 ◽  
Vol 26 (3) ◽  
pp. 355-367 ◽  
Author(s):  
Ali Joudi ◽  
Mathias Cehlin ◽  
Harald Svedung ◽  
Mats Rönnelid ◽  
Bahram Moshfegh
Keyword(s):  
Temperature Gradient ◽  
Surface Temperature ◽  
Air Temperature ◽  
Indoor Air ◽  
Surface Radiation ◽  
Radiative Properties ◽  
Temperature Distributions ◽  
Measurement Results ◽  
Building Heat ◽  
Reflective Surfaces

Radiative properties of interior surfaces can affect not only the building heat flux but also the indoor environment, the latter of which has not been thoroughly investigated. The aim of this study is to analyse the effect of surface emissivity on indoor air and surface temperature distributions in a test cabin with reflective interior surfaces. This was done by comparing experimental and simulation data of the test cabin with that of a normal cabin. This study employs transient computational fluid dynamics (CFD) using re-normalisation group (RNG) k– ε model, surface-to-surface radiation model and an enhanced wall function. Boundary conditions were assigned to exterior surfaces under variable outdoor conditions. The numerical and the measurement results indicate that using interior reflective surfaces will affect the indoor air temperature distribution by increasing the vertical temperature gradient depending on the time of the day. CFD simulations with high spatial resolution results show increased interior surface temperature gradients consistent with the increased vertical air temperature gradient. The influence of reflective surfaces is potentially greater with higher indoor surface temperature asymmetry. The vertical indoor air temperature gradient and surface temperatures are important parameters for indoor thermal comfort.

scholarly journals EXTENSION OF THE RESOURCE OF THE BURNER SWIRL BLADES OF THE BOILER TPP-312

2020 ◽  
Vol 42 (3) ◽  
pp. 61-67
Author(s):  
S.G. Kobzar ◽  
I.I. Borisov ◽  
A.A. Khalatov
Keyword(s):  
Low Carbon Steel ◽  
Pulverized Coal ◽  
Operating Conditions ◽  
Low Carbon ◽  
Blade Surface ◽  
Boiler Furnace ◽  
Subsequent Determination ◽  
Steel 20 ◽  
Burner Operation ◽  
Corrosion Of Steel

Numerical research of high-temperature corrosion of steel blades of the swirler of a pulverized coal burner of the TPP-312 boiler in real conditions of its operation is carried out. Data on the dynamics of oxidation of the blade surface for two steels and different operating conditions of the burners were obtained. The results of the calculation allow a reasonable assessment of the service life of the blades of the burner device. Corrosion rate calculations were performed based on the results of computer simulation of pulverized coal combustion in the boiler volume with subsequent determination of the temperature field on the blade surface. The corrosion dynamics was determined using the experimental oxidation constants of steel given in the literature. Data were obtained for two types of low-carbon steel, two different modes of burner operation, for the number of blades 8 and 24, and for different distances of burner blades from the embrasure of the boiler furnace, a total of 16 different variants were calculated. Calculations have shown that with increasing the distance of the blades from the embrasure of the furnace, corrosion is significantly reduced. The highest corrosion, which in its absolute value is comparable to the thickness of the blade, occurs for the disconnected burner with blades from Art. 3. The lowest corrosion occurs for the working burner with blades made from steel 20 (reduction of corrosion by 4 times), and for the disconnected burner this dependence is much smaller (reduction of corrosion by 30… 40%). References 6, Figures 5

LES of Pulverized Coal Combustion Furnaces

2011 ◽  
Author(s):  
Kenji Yamamoto ◽  
Daisuke Kina ◽  
Teruyuki Okazaki ◽  
Masayuki Taniguchi ◽  
Hirofumi Okazaki ◽  
...  
Keyword(s):  
Feed Rate ◽  
Large Scale ◽  
Pulverized Coal ◽  
Unburned Carbon ◽  
Calculation Error ◽  
Boiler Furnace ◽  
Jet Flame ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Lift Off

LES (large eddy simulation) is applied to combustion simulations of two large scale pulverized coal-fired furnaces. One application is a boiler furnace with the coal feed rate of 3,000 kg/h. The results of LES show good agreement in not only distributions of temperature, NO concentration, and CO concentration on the vertical center line but also NO and CO emissions and UBC (unburned carbon in ash). The calculation error of NO emission is 10%. The other application is a horizontal furnace with a low NOx burner with the coal feed rate of 560 kg/h. LES predicts temperatures and oxygen concentrations accurately; but the standard k-ε model does not. The flame width calculated by the standard k-ε model is narrower than that by LES. These calculated results indicate that the drawback of the standard k-ε model is its low calculation accuracy for the coal jet flame decay and lift-off height.

Numerical simulations of the slagging characteristics in a down-fired, pulverized-coal boiler furnace

2010 ◽  
Vol 91 (1) ◽  
pp. 88-96 ◽  
Author(s):  
Qingyan Fang ◽  
Huajian Wang ◽  
Yan Wei ◽  
Lin Lei ◽  
Xuelong Duan ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Pulverized Coal ◽  
Boiler Furnace ◽  
Pulverized Coal Boiler ◽  
Coal Boiler

Numerical Simulation of Three-Dimensional Temperature Distribution in the Supercharged Boiler Furnace

2011 ◽  
Vol 328-330 ◽  
pp. 327-331 ◽  
Author(s):  
Zhong Gen Li ◽  
Guo Yi Zhou
Keyword(s):  
Three Dimensional ◽  
Color Temperature ◽  
Radiative Energy ◽  
Boiler Furnace ◽  
Scaled Model ◽  
Charge Coupled Device ◽  
Temperature Distributions ◽  
The Monte Carlo Method ◽  
Reconstruction Quality ◽  
The One

In this paper, the visualization of three-dimensional (3-D) temperature distributions in the supercharged boiler furnaces from radiative energy images captured by multiple charge-coupled device (CCD) cameras mounted around the furnace is studied numerically for the first time. The combustion of supercharged boiler is analyzed by structuring a full-scaled model and grid partition. The calculation of the radiative energy image formation is a fast algorithm based on the Monte Carlo method and the two-color temperature calculation method. For the inversion of the 3-D temperature distributions, a modifiedregularization method is used. The simulation results show that: even though the measurement error of the radiative energy images for the 3-D temperature distributions up to 0.12, the position of the reconstruction high-temperature zone is almost the same to the one of the simulation. The results indicate that the reconstruction quality is satisfactory, and the method can lead to a good visualization result.

Sign in / Sign up

Export Citation Format

Share Document