scholarly journals An appraisal of the properties of bottom waste obtained from bio-mass congestion to estimate the ways of its environmental use

2017 ◽  
Vol 19 (2) ◽  
pp. 33-37 ◽  
Author(s):  
Małgorzata Śliwka ◽  
Alicja Uliasz-Bocheńczyk ◽  
Małgorzata Pawul

Abstract The bottom waste obtained from bio-mass burning shows a huge variability of chemical and physical properties, depending on the kind of bio-mass, the type of a cauldron and burning parameters. The huge variability of the bottom ashes from the incineration plant and co-combustion of bio-mass makes it difficult to find any way to its management. In reality, only the bottom ashes from coal combustion and the small amount from lignite combustion are used, mainly in the building industry and in mining industry. The article presents the initial research, concerning the estimation of the properties of the bottom ashes obtained from bio-mass congestion in the fluidized-bed boiler to use them safely for the environment. To determine the influence of the tested waste on plants, a number of pot experiments have been conducted. The plants which have been used are recommended for phytotoxicity estimation, and are also used for biological reclamation.

2011 ◽  
Vol 99-100 ◽  
pp. 116-119
Author(s):  
Jing Xiang Liu ◽  
Yuan Ming Song ◽  
Hui Zhong Xu ◽  
Yu Long Ma ◽  
Yu Bo Yue ◽  
...  

Compared with ordinary Pulverized Coal Combustion (PC) fly ashes, Fluidized Bed Combustion (FBC) ashes have some special properties. The effect of FBC ashes content on the strength of cement mortar was studied, and the physical properties of FBC ashes-cement mortar with 30% FBC ashes were also investigated. The results show that the flexural and compressive strength at 7 and 28 days of the mortar gradually decreases with the increase of FBC ashes content. Under the same dosage, the strength of FBC ashes-cement mortar is greater than that of PC fly ashes-cement mortar. The FBC ashes-cement system presents a normal setting time but poor soundness with more than 3.5% SO3. This work confirms that the properties of FBC ashes-cement system are superior to those of PC fly ashes-cement system when SO3 content is no more than 3.5%.


1993 ◽  
Vol 28 (11-12) ◽  
pp. 341-345
Author(s):  
Shigeki Minami ◽  
Hidekazu Nagasawa ◽  
Yoshinori Saito ◽  
Motoharu Yamagishi ◽  
Masakatsu Hiraoka ◽  
...  

Continuous operation data were obtained on a fluidized bed incineration plant with dryers, and two autoregressive models were then prepared through statistical analysis of the data. Based on the results, an automatic plant control system using fuzzy theory was designed. An incinerator system of this type is characterized by energy efficiency, for which optimum and stable moisture control of the dried sludge is important. The large difference in time constants between incinerator and dryers makes energy saving difficult. Based on these analyses and design, control operations at a commercial plant with a capacity of 150 wet-tons/day were studied. It was confirmed that reduction of auxiliary fuel consumption and reduction of CO and NOx in the exhaust gas were optimized, while the moisture content of dried sludge and the furnace temperature were kept stable.


2000 ◽  
Vol 33 (3) ◽  
pp. 365-371 ◽  
Author(s):  
Tsutomu Tashimo ◽  
Jun Murota ◽  
Tomohiko Suto ◽  
Kunio Kato

2019 ◽  
Vol 27 (5) ◽  
pp. 1177-1183 ◽  
Author(s):  
Zheng Gong ◽  
Yingjuan Shao ◽  
Lei Pang ◽  
Wenqi Zhong ◽  
Chao Chen

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