Causes Analysis of Wet Flue Gas Desulphurization Stack Rainout for the Thermal Powerplant without GGH and its Countermeasures

2013 ◽  
Vol 724-725 ◽  
pp. 1306-1309
Author(s):  
Peng Fei Nie ◽  
Hong Yu Zhang ◽  
Yang Wang
Keyword(s):  
Power Plant ◽  
Low Temperature ◽  
Flue Gas ◽  
Gas Flow ◽  
Electrostatic Precipitator ◽  
Thermal Power ◽  
Efficient Operation ◽  
Factors Affecting ◽  
Mist Eliminator ◽  
Flue Gas Desulphurization

This paper introduces the phenomenon of stack rainout in the wet flue gas desulphurization system for the thermal power plant units without GGH,analyzes the factors affecting rainout of wet stack and finds out the main causes resulting in stack rainout of wet flue gas desulphurization for Wangtan Power Plant without GGH,such as low temperature after the flue gas desulfurizationinsufficient diffusion capability of flue gas flowthe blockage of mist eliminatorpoor operation of electrostatic precipitatorinadequate combustion of boilerhigh speed of flue gas flow in the stackthe effect of climate. Also it is analyzed that the mist eliminator equipment and ensuring the efficient operation of electrostatic precipitator may relieve the phenomenon of stack rainout.

Analysis of Exhausting Flue Gas Temperature Abnormal Accompanied with the Boiler Load Changing

2013 ◽  
Vol 805-806 ◽  
pp. 1836-1842
Author(s):  
Qing Feng Zhang ◽  
Zhen Xin Wu ◽  
Zhen Ning Zhao
Keyword(s):  
Heat Transfer ◽  
Power Plant ◽  
Flue Gas ◽  
Gas Flow ◽  
Thermal Power ◽  
Transfer Principle ◽  
Air Leakage ◽  
Gas Temperature ◽  
Boiler Load ◽  
Hot Air

Based on the heat-transfer principle of air pre-heater, the influence mode of the changes of the air flow, the flue gas flow, the air leakage in different locations, to the temperature of the hot air and the exhausting gas was researched. The problem of a pulverized coal fired boiler, No.2, of a Thermal Power Plant, which the deviation of exhausting flue gas temperature increased to an abnormal extend when the boiler load rise up quickly was analyzed, the fault position and fault reason were located exactly, and the fault was eradicated by equipment maintenance at last. The results of this study have a certain significance to solve similar problems.

Remote Gas Emission Flux Sensing in a Thermal Power Plant Using Shadow Image Processing

2014 ◽  
Vol 522-524 ◽  
pp. 638-642
Author(s):  
Helmut Neff ◽  
Elmar Uwe Kurt Melcher ◽  
Joseana Macêdo Fechine Régis de Araújo ◽  
Sergio de Brito Espinola ◽  
Adalberto Gomes Teixeira Júnior ◽  
...  
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Gas Flow ◽  
Thermal Power ◽  
Shadow Image ◽  
Imaging Method ◽  
Flow Profile ◽  
Gas Emission ◽  
Flow Measurements ◽  
Carbon Soot

Total flue gas emission is a crucial quantity for control of environmental impact in thermal power plants. Direct gas flow measurements by Pitot tubes and other sensors are hampered by the very high temperature at the exhaust, high content of carbon soot and frequently turbulent flow conditions, which cause a non-parabolic flow profile across the exhaust cross section. We are developing an optical imaging method for gas flux measurements, using shadow video imaging of the dynamic hot gas emission profile at the power plant exhaust. All, high exhaust gas temperature, pressure increase and carbon soot content cause small variations of the refractive index. This deflects a considerable amount direct sunlight under inclined solar illumination conditions (at approx 38 deg inclination angle), and results in a rather sharp contrast and clear shadow image of the gas flow above the exhaust. This feature is not observable in direct transmission imaging. The distant flow shadow image pattern, as seen on the plant floor, is video monitored over a short time period and the dynamic image evolution digitally processed and analyzed. The presented method is similar to the well known optical so-called Schlieren imaging technique. Initial video processing algorithms and results are presented that provide the flue gas flow velocity directly at the exhaust exit, being close to the expected values, obtained from power plant process parameters.

Application of Low Low Temperature ESP Technology in Thermal Power Plant

2014 ◽  
Vol 1070-1072 ◽  
pp. 1481-1485 ◽  
Author(s):  
Yu Yun Fu ◽  
Ke Ma
Keyword(s):  
Power Plant ◽  
Low Temperature ◽  
Energy Saving ◽  
Flue Gas ◽  
Thermal Power Plant ◽  
Emission Reduction ◽  
Thermal Power ◽  
Dust Removal ◽  
Environmental Situation ◽  
Removal Technology

With the environmental situation becoming more and more serious, the dust removal technology in thermal power plant needs to be continually improved. Developed in recent years, the low cryogenic ESP technology can not only remove dust and most SO3 in flue gas, but also meet the needs of emission reduction and energy saving in coal-fired power plant, which means it is worthwhile to promote this kind of technology.

High Flue Gas Flow Rate Tests for Removal and Recovery of Carbon Dioxide under Power Plant Effluent Gas Conditions

2004 ◽  
Vol 30 (6) ◽  
pp. 758-761
Author(s):  
Tomio MIMURA ◽  
Yasuyuki YAGI ◽  
Masaki IIJIMA ◽  
Ryuji YOSIYAMA ◽  
Takahito YONEKAWA
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Flow Rate ◽  
Flue Gas ◽  
Gas Flow ◽  
Gas Flow Rate ◽  
Power Plant Effluent ◽  
Removal And Recovery

scholarly journals Study on SO3 Cooperative Removal Effect of Ultra-low Emission Technology in Coal-fired Power Plants

2018 ◽  
Vol 53 ◽  
pp. 04005 ◽  
Author(s):  
Ding Yang ◽  
Yi Luo ◽  
XingLian Ye ◽  
WeiXiang Chen ◽  
Jun Guo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Flue Gas ◽  
Power Plants ◽  
Electrostatic Precipitator ◽  
Removal Rate ◽  
Flue Gas Desulfurization ◽  
Paper Briefly ◽  
Low Emission ◽  
Electrostatic Precipitators

SO3 is one of the main precursors of atmospheric PM2.5, and its emission has attracted more and more attention in the industry. This paper briefly analyzes the harm of SO3 and the method of controlled condensation to test SO3. The effect of cooperative removal of SO3 by ultra-low emission technology in some coal-fired power plants has been tested by using the method of controlled condensation. The results show that the cooperative removal of SO3 by ultra-low emission technology in coal-fired power plants is effective. The removal rate of SO3 by low-low temperature electrostatic precipitators and electrostatic-fabric integrated precipitators can be exceeded 80%, while the removal rate of SO3 by wet flue gas desulfurization equipment displays lower than the above two facilities, and the wet electrostatic precipitator shows a better removal effect on SO3. With the use of ultra-low emission technology in coal-fired power plants, the SO3 emission concentration of the tail chimney reaches less than 1 mg / Nm3.

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