accumulation of a large amount of coal slime would cause soil pollution, and the air-dried coal slime also would cause dust in the air [3, 4]. At present, the usage of coal slime can be divided into the following three categories [5 –7]: (1) Co-combustion. Due to the high moisture content of coal slime, the co-combustion
In this paper, we represent a systematic experimental study to assess the feasibility of the combustion of dried fine powders of coal slime in CFBs. The fluid …
Preparation Plant, the coal slurry was dried to make dry coal slime. After that, the ultra-pure water was used with a resistivity of 18.25 MΩ×cm to make coal slurry with a concentration of 80 g/dm3 in a 300 cm3 capacity beaker, and stirring for 5 minutes to mix the coal slime particles with ultra-pure water.
In this paper, we performed a comparative analysis of the main physical properties, ignition and combustion characteristics of several types of coal processing waste. The comparison is made for typical …
This study reports an experimental investigation on the nitrogen oxide (NOx) emissions in pulverized fuel (coal and char) combustion through preheating with a circulating fluidized bed. The high-temperature preheated fuel particles obtained from the circulating fluidized bed would be burned in the down-fired combustor. The focus of this …
According to the GB/T4757-2001 pulverized coal (mud) laboratory unit flotation test method, n- dodecane was selected as the flotation collector, and Methyl isobutylcarbinol …
Intelligent circle and line detection based on Hough transform is applied to obtain the background template of the raceway image. The merged local segmentation algorithm is used to obtain the regions of pulverized coal and particles. The mass flow of PCI is characterized by the coal feature calculated by the linear weighted method.
Highlights. The hot air/microwave combined drying process was initially applied to coal slime drying. The moisture contents of hot air drying switching into …
The specific working principle is that pulverized coal is mixed with the low excess air coefficient in a CFB and is preheated to above 800 °C. The high temperature preheated char and coal gas generated by the preheating process are sent to the DFC through the horizontal tube, and then mixed with the secondary air and tertiary air to …
The stability of pulverized coal flames is a well-known problem in the power industry. Unstable flames often lead to lower combustion efficiency, higher pollutant emissions, and other operational problems. Many methods are available for flame monitoring and characterization, but very few are suitable for flame stability monitoring. This paper …
Pulverized coal injection (PCI) is a special process used in blast furnaces in which pulverized coal is preheated. However, there are few studies on the application of this technology in industry.
The co-disposal of sludge in pulverized coal boilers is an effective approach to rapidly and safely disposing of sludge, with benefits such as energy recovery and resource utilization [1,2]. The co-combustion of sludge with coal is currently employed as a viable method to convert dried sludge into higher-value fuels or chemicals.
In order to develop effective catalysts for use in pulverized coal-fired boilers, researchers would need to consider a number of factors, including the chemical composition of the coal being burned and the …
Large And Small Horizontal Pulverized Coal Slime Single Drum Drum Pulverized Coal Dryer, Find Complete Details about Large And Small Horizontal Pulverized Coal Slime Single Drum Drum Pulverized Coal Dryer,Drying Equipment,Rice Dryer Machine,Wood Dryer Machine from Drum Drying Equipment Supplier or Manufacturer-Eversun …
calorific value of coal slime is 32.1% and 12.72 MJ/kg, respectively. The wet coal slime is injected to the furnace of CFB boiler by the coal slime pump, and combusted in the furnace for power generation. The particle size distribution of dried coal slime is shown in Fig. 2, with a 50% cut mean diameter (d50) of 63.24 m. Ash fusibility μ
This paper presents the monitoring of the oscillatory characteristics of pulverized coal flames using image processing and spectral analysis techniques. The instrumentation system employed in this ...
Coal water slurry is a mixture of pulverized coal and water, that is combustible. The coal water slurry if used for combustion applications, should …
Co-pyrolysis of the coal blend with lignocellulosic biomass has a significant influence on final product composition of co-gasification and co-combustion. Successful evaluation of …
The combustion of pulverized coal is far more complex than that of methane and biomass due to its complex physical and chemical properties ... Monitoring of oscillatory characteristics of pulverized coal flames through image processing and spectral analysis. IEEE Trans. Instrum. Meas., 55 (2006), pp. 226-231, 10.1109/TIM.2005.861254.
Kang et al. [21] studied the effect of a char's structure on ash formation during the combustion of pulverized coal and concluded that the fragmentation of a char induced by macropores can influence the particle-size distribution (PSD) of the final ash, due to less coalescence of ash particles. ... Incineration of coal slime in the fluidized ...
This paper presents the monitoring of the oscillatory characteristics of pulverized coal flames using image processing and spectral analysis techniques. The instrumentation system employed in this ...
A new technique to preheat pulverized coal in a circulating fluidized bed was adopted. This technique consists of two stages: the pulverized coal is first self-preheated in a circulating fluidized bed, and then the preheated fuel gas and char particles are burned out in a down-fired combustor under air-staging conditions. Experiments were conducted …
The flame image processing and analysis system has been investigated for the optimal pulverized coal firing of thermal power plant, especially for lower nitrogen oxide generation and more safe ...
In this paper, we analyze the exergy costs of a real large industrial boiler with the aim of improving efficiency. Specifically, the 350-MW front-fired, natural circulation, single reheat and balanced draft coal-fired boiler forms part of a 1050-MW conventional power plant located in Spain. We start with a diagram of the power plant, followed by a …
The purpose of this work was to propose an optical measuring system for pulverized coal combustion, and to develop an ancillary image-processing method to ensure the reliability of the results. The particle-tracking image pyrometer (PTIP) system proposed in this work was mainly composed of a high-resolution high-speed camera and …
The coal components were coking bituminous coal from the Berezovskoe deposit (Kemerovo region, Russia) and coal slime was derived from the processing of coal of the same rank. Coal components were first ground in a rotor mill and riddled to obtain a fine powder with a particle size of no more than 100 m. This pulverized …
images. The image processing methods are then used to extracted features of the PCI and particles. As shown in Fig. 3, a raceway image is composed of three parts that are pulverized coal cloud, raceway, and background consisting of the inner wall and coal lance. In this work, the target is to obtain the pulverized coal cloud
Abstract: This paper presents the monitoring of the oscillatory characteristics of pulverized coal flames using image processing and spectral analysis techniques. The instrumentation system employed in this investigation is an integral part of a multifunctional flame monitoring system, being capable of monitoring the oscillatory frequency of a …
DOI: 10.1016/j.jaap.2022.105718 Corpus ID: 252443115; Pyrolysis kinetics and reaction mechanisms of coal slime for cleaner energy @article{Ling2022PyrolysisKA, title={Pyrolysis kinetics and reaction mechanisms of coal slime for cleaner energy}, author={Peng Ling and Jun Xu and Tao Liu and Xiaoxue An and Xin Wang and …
The pulverized coal combustion process in power boilers is still being improved by the preliminary cleaning of coal and the use of various catalytic additives. Another area of research that could ...
