Advanced Materials Research Vols. 608-609

Abstract: To ignite a boiler, fuel oil is primarily used to pre-heat the combustion chamber of a furnace to its operating temperature, which consumes a large amount of oil, especially for igniting low-volatile coal. To save the oil, the plasma-chemical preparation and tiny-oil ignition technology are developed to ignite pulverized-coal. However, it is difficult to apply them to anthracite and lean coal. Therefore, this paper theoretically focused on the experiment of igniting low-volatile coal in a tiny- oil burner in oxygen-enriched conditions for developing an ignition technology to save fuel oil. The experimental results indicated that the ignition of low-volatile coal was achieved in a tiny- oil burner in oxygen-enriched conditions, and appropriate amounts of pure oxygen feeding into the burner could promote the burning-out of fuel oil and pulverized coal, which was beneficial to reducing black smoke from oil and saving fuel oil in ignition process.

Abstract: The existing optimized operation of circulating water system does not suit piping-main scheme circulating water system with double-pressure condenser. The optimum vacuum of piping-main scheme should be defined as the vacuum which makes the difference between the sum of the two units’ added electric power and the circulating water pump power maximum. The plan of optimized operation of piping-main scheme circulating water system which is based on this kind of optimum vacuum was put forward. And a specific example of 2×660MW units was given, the power plant’s optimized operation mode of the whole circulating water system at difference conditions was obtained. The results show that the optimized scheme is correct and suit the piping-main scheme circulating water system, and the optimized operation can well improve the steam turbine economy.

Abstract: Taking the actual production status of a 600MW unit as an example, under different steam flux, it has used the equivalent enthalpy drop theory in this paper to calculate the thermal economic indicators of the auxiliary steam header with different auxiliary steam sources. Moreover, it has conducted a quantitative analysis of the mechanism of the choosing of auxiliary steam source and auxiliary steam source switching’s influence on the thermal economy of unit in this paper.

Abstract: Melting is the most energy consuming process in the manufacture of mineral wool. This paper dealt with evaluation of two types of energy saving measures in the process of producing mineral wool. In order to detect the energy saving measures that can also provide economic profits, the study examined the following measures: utilization of flue gas heat, thermal power supplement with coke oven gas. The analytical method used for energy saving were material balance and energy balance. It is found that the most effective energy saving measure is thermal power supplement with coke oven gas. The maximum energy saving is up to 39.3% when coke/coke oven gas is 50:1. The economic cost of saving runs to 3.017 million RMB every year.

Abstract: In this paper, a compact TLT is developed basted on the theories of transmission line and a LCR triggered switch is introduced. A compact structure of components and topology is designed to reduce the influence of the total inductance of capacitor discharge circuit. The experimental results indicate that the voltage gain is up to 1.98. A pulse with peak voltage of up to 20kV, duration time of 200ns and rise time of about 25ns is obtained; the TLT could work successfully in 500Hz.

Abstract: This paper analyzes the low-carbon society research background of ground source heat pump (GSHP) and presents the principles of GSHP system. It describes two kinds applications of GSHP system, and reveals the development trend of the GSHP system.

Abstract: Thermal power as a focus area for energy saving and pollution reduction, energy saving and environmental protection work is particularly important.This article mainly introduced principal components analytic method basic philosophy and principle, principal components analysis geometry significance, sample principal components deriving, overall principal components and nature, and using this method to known five power plant unit's actual movement when the pollutant emissions and the water used have carried on the quality synthetic evaluation. And gives the appraisal and the basic improvement opinion based on the analysis result to various power plants.The results showed that: The method eliminates the influence of subjective factors on the evaluation, obtain a comprehensive evaluation index which can be evaluated quantitatively.

Abstract: QAR recorded a large number of the real operation of flight fuel consumption process parameters. How accurate expression of the aircraft fuel consumption using a limited number of parameters to ,And then guide the fuel installation of Both theory and engineering value, In this paper, the method based on rough set attribute reduction, In order to quickly capture the QAR parameter populations for fuel consumption is estimated to significantly affect parameters. This method is more time-consuming short flight mechanics analysis methods, Subjective impact of low, And universal. In addition, the method also integrated into the continuous attribute discrimination algorithm based on information entropy. Further improve the reliability of the results of data analysis. Finally, the algorithm implementation steps and simulation results verify the effectiveness of the algorithm.

Abstract: Now China has a lot of low-efficiency, large- pollution and small-capacity captive power plant, it is not conducive to energy conservation, also affect the power company electricity sales, so we should achieved “ordering power by heat” to limit the actual generated energy that does not belong to the generated energy based on “ordering power by heat”. This article used the thermoelectric separation method to calculate the generated energy based on “ordering power by heat”. It has laid a certain foundation to truly realize the “ordering power by heat”.

Abstract: Based on the situation that the transformations of the technology which is used to reclaim the physical sensible heat of the boiler slag in some industrial captive power plants, it has been used the heat balance method and the equivalent heat drop method to calculate and analyze the thermal economic indicators before and after the transformations of the unit, and then reveal the mechanism of the impact of the boiler slag’s physical sensible heat on the thermal economy of the whole plant.