Acid?Inhibitor cleaning of condensers of turbines for thermal and nuclear power stations

Kirilyuk, S. S.; Mindyuk, A. K.; Berezkin, N. N.

doi:10.1007/bf00731947

Cited by 3 publications

(5 citation statements)

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“…The most efficient way to ensure that tubes achieve their full life expectancy and heat transfer efficiency are to keep them clean, every two to three years [5]. Currently, there are three methods for condenser cleaning which are: on-line mechanical cleaning [5], off-line mechanical cleaning [1,6], and chemical cleaning [6,7,8]. In the present study, the chemical cleaning method is applied.…”

Section: Condenser Descalingmentioning

confidence: 99%

“…The mineral scale can be removed by a chemical solvent such as hydrochloric acid and hydrofluoric acid [10,11]. Examples of these agents are; the mixture of acids such as Trilon-B with limonic, or maleic acid, or low molecular acid, or with hydrochloric acid [7,10,8]. However, rinsing with hydrochloric and hydrofluoric acids causes pitting and corrosion of brass condenser pipes, in addition to the relatively high cost of such cleaning method [7,11].…”

Section: Chemical Cleaning Of Condenser Tubes Has Three Stepsmentioning

confidence: 99%

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Investigation of the Effects of Condenser De-Scaling on the Exhaust Emissions and the Performance of Thermal Power Plants

Bady

Hassanien

2016

JES. Journal of Engineering Sciences

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The performance of thermal power plants is mainly dependent on the vacuum pressure of the condenser. The de-scaling process of the condenser can be considered as the key solution to avoid the declination of power plant performance. Accordingly, the objective of the current investigation is to study the impacts of condenser de-scaling process on the performance and exhaust emissions of thermal power plants by using an environment-friendly de-scaling agent. In this study, Assiut Thermal Power Plant (ATPP) has been carefully chosen to carry out the investigation, where the maximum load achieved on 2010 was 200 MWh out of the design load 312 MWh. Results indicate that condenser de-scaling process resulted in a significant improvement of the turbine efficiency and increased the maximum load generated to be 290 MWh rather than the previous value of 200 MWh. Additionally, a major reduction in the fuel consumption is attained which leads to decrease the exhaust emissions of CO, SO x , and NO x. Moreover, a considerable reduction of CO 2 emissions by more than 600 ton/day is acquired, which decreases the thermal pollution and reduces the contribution to global warming.

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Section: Condenser Descalingmentioning

confidence: 99%

Section: Chemical Cleaning Of Condenser Tubes Has Three Stepsmentioning

confidence: 99%

Investigation of the Effects of Condenser De-Scaling on the Exhaust Emissions and the Performance of Thermal Power Plants

Bady

Hassanien

2016

JES. Journal of Engineering Sciences

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“…3. Chemical cleaning (acid cleaning) [6,7,8]. In the present study, the chemical cleaning method will be applied (i.e.…”

Section: Condenser Cleaningmentioning

confidence: 99%

“…But rinsing with hydrochloric acid and hydrofluoric acid causes pitting and corrosion of brass condenser pipes [6], additionally, the work is expensive [9]. Mixture of acids such as Trilon B with limonic or maleic acid, adipic acid, phthalate anhydride, Low Molecular Acid (LMA), hydrochloric acid, or mixture of acids [6,7,8] were used, hydrochloric acid and a mixture…”

Section: Chemical Cleaningmentioning

confidence: 99%

“…By re-obtaining the original conditions of the condenser, its efficiency in heat exchanging was increased which led to increase the heat transfer rate, vacuum in condenser as shown in Figure (7), and Table (8), and consequently turbine efficiency increases to the limit with which the load was raised from maximum load 200 MW in 2009 to 290 MW, which we could not reached since 2007 until cleaning (as presented in Figure (8), and Table (9)). Finally, we retained 90 MWh [4] and because of the decay in boiler efficiency (become 86 %), we could not reach to the maximum load of 312 MW.…”

Section: Efficiency Improvementmentioning

confidence: 99%

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Study of the Effects of Using Acetic Acid in Condenser De-Scaling on the Exhaust Emissions and the Performance of Assiut Thermal Power Plant

Bady

Hassanien

Mousa

et al. 2013

JES. Journal of Engineering Sciences

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In the present study, an investigation of the effect of using acetic acid (CH 3 COOH) in condenser descaling on the exhaust emissions and the performance of Assiut Thermal Power Plant. Efficient condenser operation maintains turbine efficiency; benefits consumers by reducing the amount of emissions. Condenser vacuum has a great effect on the unit efficiency to a degree that it reduces the generated load by 112 MW (35.9%) in unit one of Assiut Power Plant and to the extent that cleaning became very necessary. From environmentally point of view an organic, biodegradable, locally produced, effective and cheap de-scaling agent was the very applicable one and this meet with acetic acid. Actually, condenser cleaning leads to an improvement in the turbine efficiency and raises the maximum load generated from the unit (from 200 MW before cleaning to 290 MW after cleaning), decreases fuel consumed for MW (from 249 kg/MWh at load 200 MW to 220 kg/MWh at load 290 MW), reduces the overall fuel consumption, consequently, reduces emissions as CO, CO 2 , SO x , NO x , ground level ozone, PM, VOC, ashes, solid deposits, haze, thermal pollution, and reduces contribution to global warming, heat island effect at Assiut city. In brief, the condenser cleaning process reduces the environmental pollution from the unit which in turn minimizes the health impact of these pollutants.

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Development of High Temperature TiB<sub>2</sub>-Based Ceramics

Raju

Basu

2008

KEM

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In view of potentiality of titanium diboride (TiB2) materials for high temperature applications, this paper presents the state of art on the processing, microstructure and properties of TiB2 ceramics. TiB2 ceramics are of interest for applications such as cutting tools, wear resistant parts, armor material and electrode materials in metal smelting because of their excellent combination of properties including high hardness, elastic modulus, better strength to weight ratio, wear resistance, good thermal and electrical conductivity. However, such broader applications of the monolithic TiB2 are inhibited by factors like high sintering temperature and poor toughness. Hence, research efforts are directed towards processing TiB2 at lower sintering temperature as well as to enhance the properties with the use of various metallic and non-metallic sinter-additives. In the above perspective, we review the existing literature in this article. In addition, our recent research results obtained with TiB2-TiSi2 materials are also presented. A review of research results revealed that a combination of room temperature properties, i.e. maximum Vickers hardness of 31 GPa and indentation toughness of 11 MPa m1/2 and flexural strength of 810 MPa is obtainable with optimally sintered TiB2. More importantly, a maximum hardness of 9 GPa (at 900oC) and flexural strength of 471 MPa can be retained upto 1200oC. From the perspective of oxidation resistance, TiB2 samples exhibit parabolic oxidation kinetics below 1000oC as result of the formation of TiO2 (s), and B2O3 (l) and linear oxidation kinetics above 1000oC in the presence of crystalline TiO2 and volatile B2O3.

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Acid?Inhibitor cleaning of condensers of turbines for thermal and nuclear power stations

Cited by 3 publications

References 0 publications

Investigation of the Effects of Condenser De-Scaling on the Exhaust Emissions and the Performance of Thermal Power Plants

Investigation of the Effects of Condenser De-Scaling on the Exhaust Emissions and the Performance of Thermal Power Plants

Study of the Effects of Using Acetic Acid in Condenser De-Scaling on the Exhaust Emissions and the Performance of Assiut Thermal Power Plant

Development of High Temperature TiB<sub>2</sub>-Based Ceramics

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