Flow Measurement of Primary Air Containing Pulverized Coal with Simple Venturi Tube

2014 ◽  
Vol 986-987 ◽  
pp. 1506-1509
Author(s):  
Xing Sen Yang ◽  
Jing Yin
Keyword(s):  
Flow Measurement ◽  
Power Plants ◽  
Thermal Power ◽  
Pulverized Coal ◽  
Venturi Tube ◽  
Thermal Power Plants ◽  
Coal Particles ◽  
Safe State ◽  
Coal Flow ◽  
Remarkable Deviation

The flow measurement of primary air is very important for thermal power plants to maintain the safe state of operation. For direct firing pulverizing system, the measuring is essentially affected by pulverized coal particles. Abrasion and occlusion would bring great trouble to the measurement. Many measuring methods are invalid under that circumstance. Lots of efforts have been made to find appropriate ways to measure the flow of primary air containing pulverized coal. Venturi tube had been successfully used to measure the flow of air. If a venturi tube is used to measure the flow velocity of primary air, the differential pressure goes higher with the increase of the concentration of pulverized coal in the primary air. The neglect of the affection of pulverized coal on the measuring would result in remarkable deviation. With the aids of coal flow rate, a method of using venturi tube to measure the velocity of primary air containing pulverized coal was established. The affection of pulverized coal on flow measuring of primary air cannot be ignored.

scholarly journals Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy: Part B

2019 ◽  
Vol 23 (Suppl. 5) ◽  
pp. 1611-1626
Author(s):  
Predrag Stefanovic ◽  
Dejan Cvetinovic ◽  
Zoran Markovic ◽  
Milic Eric ◽  
Simeon Oka ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Power Plants ◽  
Thermal Power ◽  
Pulverized Coal ◽  
Thermal Engineering ◽  
Thermal Power Plants ◽  
Pulverized Coal Combustion ◽  
Research Projects ◽  
Large Power ◽  
Combustion Processes

Paper presents short review of research problems, applied methods for solving problems and main results obtained by the researchers in Laboratory for Thermal Engineering and Energy (LTE) of the "Vinca" Institute of Nuclear Sciences, Belgrade, Serbia dealing with pulverized coal combustion processes and technologies for reduction of pollutions problems at thermal power plants in a period since 2000. The presented results were published in numerous studies realized for different users, Ph. D., Masters, and Specialist thesis, in international and domestic scientific journals and monographs, presented at numerous international and domestic scientific conferences, etc. Presented research projects and results of applied research projects realized at pulverized coal combustion thermal power plants clearly show that LTE team was involved in key activities of rehabilitation and modernization, including implementation of best available technologies for pollution reduction at thermal power plants, in the region of South East Europe.

scholarly journals Structural and Parametric Optimization of S-CO2 Thermal Power Plants with a Pulverized Coal-Fired Boiler Operating in Russia

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7136
Author(s):  
Andrey Rogalev ◽  
Vladimir Kindra ◽  
Ivan Komarov ◽  
Sergey Osipov ◽  
Olga Zlyvko
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Rankine Cycle ◽  
Combustion Products ◽  
Pulverized Coal ◽  
Electricity Production ◽  
Working Fluid ◽  
Inlet Temperature ◽  
Thermal Power Plants ◽  
Increase Energy Efficiency

The Rankine cycle is widely used for electricity production. Significant weight and size characteristics of the power equipment working on superheated steam are the main disadvantages of such power plants. The transition to supercritical carbon dioxide (S-CO2) working fluid is a promising way to achieve a significant reduction in equipment metal consumption and to increase energy efficiency. This paper presents the results of thermodynamic analysis of S-CO2 thermal power plants (TPPs) utilizing the heat of combustion products of an energy boiler. It was found that the net efficiency of the developed S-CO2 TPP with a pulverized coal-fired boiler reached 49.2% at an initial temperature of 780 °C, which was 2% higher compared to the efficiency level of steam turbine power plants (STPPs) at a similar turbine inlet temperature.

scholarly journals REAL TIME PULVERISED COAL FLOW SOFT SENSOR FOR THERMAL POWER PLANTS USING EVOLUTIONARY COMPUTATION TECHNIQUES

2015 ◽  
Vol 05 (02) ◽  
pp. 911-916
Author(s):  
Raja Singh B. ◽  
◽  
Rominus Valsalam S. ◽  
Pratheesh H. ◽  
Sujimon K. T. ◽  
...  
Keyword(s):  
Evolutionary Computation ◽  
Real Time ◽  
Power Plants ◽  
Thermal Power ◽  
Soft Sensor ◽  
Thermal Power Plants ◽  
Computation Techniques ◽  
Coal Flow ◽  
Pulverised Coal

A New Method for Determining Pulverized Coal Economic Fineness

2013 ◽  
Vol 441 ◽  
pp. 1072-1076
Author(s):  
Xiao Bin Huang ◽  
Pei Chao Zhang ◽  
Long Fei Liang
Keyword(s):  
Power Plant ◽  
Ignition Temperature ◽  
Power Plants ◽  
Thermal Power ◽  
Combustion Efficiency ◽  
Pulverized Coal ◽  
New Method ◽  
Thermal Power Plants ◽  
Coal Blending ◽  
The Relationship

Coal blending technology is commonly used in coal-fired thermal power plant in recent years to ease cost pressures. But thermal power plants still use empirical formula to determine the economic fineness of pulverized coal. This approach cannot change economic fineness of pulverized coal based on the proportion of blending coal timely and accurately, resulting in increasing carbon content of fly-ash and reduced combustion efficiency of boiler. In this paper, a new method for determining pulverized coal economic fineness is proposed. Dry ash-free basis volatile, coal uniformity index, ignition temperature, proportion of blending coal are considered as parameters. According to the relationship between these parameters, the best coal fineness can be obtained in real-time. Influences of coal blending technology are reduced greatly and the accuracy of the economic fineness is improved.

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