Papers by Keyword: Coal-Fired Power Plant

Abstract: A 600 MW coal-fired power plant was taken as the object. How to optimize the operations conditions to keep good economics was investigated. The results show that the turbine heat rate of this unit after class I, II correction and aging correction was lower than the designed value. The unit was operated under good conditions. Throttling can decrease the performance ability of the steam in the turbine. Decreasing the throttling loss is beneficial to enhance the economics of the coal-fired power plant in practice.

Abstract: Through integrating the induced draft fan and desulphurization pressurization fan, the retrofited 300 MW coal-fired power unit can achieve lower power consumption rate. The operation economy has been improved, and it is also found that this retrofit can benefit the operation of both the boiler and gas desulfurization system. This work can provide valuable reference for the economic analysis of similar units.

Abstract: The structural integrity of heat exchanger tube at high pressure heater of coal-fired power plant has been evaluated using fitness for service (FFS) assessment level 2 and 3. The purpose of this study isto determine the root cause of failure and the remaining life of components thereforethe possibility of failure due to improper design and operation can be known and it become a reference fordesigning a new design tubein a retubing process. Based on the evaluation results using level 2 assessment, the failureon the heat exchanger tubesisnotcaused bythe material creep becausethe total damage due to creep has been successfully met the requirements with the operating life3.873x10⁹hours. However, base on the results of level 3 assessment using finite element, the minimum safety factor against yielding is below 1.0 and itdoesn’t meet the plastic collapse criterion, therefore the possibility of leakage failure on the tube is caused by the improper design which the construction of the tube is not able to withstand the operating load.

Abstract: The electrostatic-bag integrated precipitator is applied in some coal-fired power plants in recent years. In accordance with the investigation and analysis on 33 electrostatic-bag integrated precipitator,most of bags are broken up or replaced in more than two years. The reason shows that the contents of NO₂ and SO₃ of flue gas generated in electric precipitator increase and the strengthening degree of bags decreases, So that the filter bags in low reach are destroyed. We should be careful in application in order to avoid the unnecessary loss.1 Current Situation and Problem Analysis on Electrostatic-bag Integrated Precipitator

Abstract: Energy conservation and emission reduction is not only an important strategy for China to achieve sustainable development , but also an inevitable choice to deal with the challenges of energy resource constraints and climate change. This paper built an evaluation system based on set pair analysis to evaluate the performance of energy conservation and emission reduction for coal-fired power. Seven main indices were picked out to and their weight were determined by experts. Then, the paper constructed an expression of connection degree. At last, an example was given to prove the feasibility and reliability of this evaluation system.

Abstract: Pulverizing system is the main energy-consumption equipment in coal-fired power plant, so it is of great significance to study energy-saving and optimization of pulverizing system. This paper first analyzes the situation and condition of pulverizing system in large-scale coal-fired power plant in China. According to analysis, coal mill and primary-air fan are the two main energy consumption facilities. Then their energy consumption characteristics, including power consumption and unit power consumption are studied. Subsequently, the energy-saving operation proposal for the pulverizing system is proposed.

Abstract: The mechanism of NOx formation in coal combustion, NOx control methods and key DeNOx technologies is to be introduced. Denitrification is very significant for saving energy and carbon sources. By analysis of NOx production mechanism, the principles of controlling NOx production and lowering emission of NOx by classified combustion are described. Combined with actual operation, low-NOx combustion rehabilitation programs and relevant test to be done is to be proposed. The actual operation of the unit achieved good results after the transformation, provide a reference for similar units.

Abstract: Atmospheric pollution is increasingly serious in China, and coal-fired power plant is an important reason for it; therefore, it is very crucial to adjust energy structure and industry structure for the regional eco-civilization and sustainable development. Taking Baicheng city in western Jilin as an example, by the method of quantitative and qualitative analysis, firstly, this paper analyzes the significance and conditions of the development of circular economy of thermal power. Furthermore, the thermal power cycle economic model which is built for promoting and upgrading the regional industrial structure, and strengthening healthy development of social economy and environment. It is suggested to build a virtual eco-industry park, taking Baicheng power generation co. as the core, including internal clean production of the coal-fired power plant, and linking the coal-fired power plants with agriculture, industrial, tourism and recycling industry. Keywords: Coal-fired power plant, Circular economy, Build, Western Jilin

Abstract: According to the analysis of coal-fired power plants, the article built the evaluation index system of coal-fired power plants energy conservation and emission reduction. Based on analytic hierarchy process (AHP), we determined the weight of each evaluation index. By using the calculation of rating scores in cleaner production, we set up a model of energy conservation and emission reduction for coal-fired power plants. On the basis of the results, the level of coal-fired power plants energy conservation and emission reduction was divided into five levels: excellent, good, medium, pass and fail. Taking a coal-power plant in Heilongjiang Province as an example, we drew a conclusion that the score of energy conservation and emission reduction in the coal-power plant was 89.52 which represents the good level. According to the evaluation result, we proposed corresponding suggestions. The results provide decision-makers with ideas and methods for energy conservation and emission reduction evaluation in the coal-fired power plant.

Abstract: A major source of PM_2.5 is the combustion of coal-fired power plant, so its very necessary to monitor and control the emission of PM_2.5 form power plant. This paper summarizes the main emission control technologies of PM_2.5 for coal-fired plant. As the traditional electrostatic precipitators has low removal efficiency of submicron particles, so we improved the supply conditions of the precipitator, and pre-charged to improve the particle properties. Through this article, we know that using electric coagulation technology to control the particles form plant is practicable, and it has a good prospect for development.