The circulating fluidized bed boiler (CFB boiler) is an updated version of the BFB boiler, thus it is the second-generation fluidized bed boiler. ... In-furnace desulfurization in the CFB boiler is more efficient than that in the BFB boiler—to reach 90% desulfurization efficiency, a typical CFB boiler needs a molar ratio of limestone to ...
We compared the direct desulfurization behavior of four different domestic limestone samples (CaO fraction 40–55%, average particle size 37.5 μm) using a …
The advantage of circulating fluidized bed (CFB) boilers in China is their ability to utilize low rank coal with low cost emission control. However, the new National Emission Regulation (NER) issued in early 2012 brings much more stringent challenges on the CFB industries, which also causes much attention from other countries. Based on the …
RECIRCULATION AND COMBUSTION IN THE CIRCULATING FLUIDIZED BED BOILER s. F. Li, M. X. Fang, B. Yu, Q. H. Wang, Z. Y. Luo ... by CaS04-richshell to prevent the following desulfurization. The degree of limestone utilization is very low, as claimed about 25-45%. Carbon content in the fly ashes from the CFB combustors is estimated to be up …
DOI: 10.7844/KIRR.2015.24.5.3 Corpus ID: 111937601; A Review of Desulfurization Technology using Limestone in Circulating Fluidized Bed Boiler Type Power Plant @article{Baek2015ARO, title={A Review of Desulfurization Technology using Limestone in Circulating Fluidized Bed Boiler Type Power Plant}, author={Chul-Seoung Baek …
The application of semi dry desulphurization technology in a circulating fluidized bed boiler is introduced in the paper. The principle and technical characteristics of semi dry desulphurization process are described in detail. The semi dry desulfurization process has certain reference value in the application of circulating fluidized bed boilers.
A Review of Desulfurization Technology using Limestone in Circulating Fluidized Bed Boiler Type Power Plant Chul-Seoung Baek*,***, Jun-Hoyung Seo*, Ji-Whan Ahn**, ...
While significant research have explored the changes in desulfurization efficiency of limestone due to fuel devolatilization, combustion and ash formation in oxy …
the slight decrease in combustion temperature. Limestone addition will lead to the increase in NOx emission in the combustion of coal slime. In 75 t/h coal slime CFB boiler, the desulfurization efficiency of limestone injection in furnace is close to 98%, achieving the ultra-low SO2 emission. To meet the standard of ultra-low NOx and SO2
Limestone or dolomite is often added as a adsorbent in circulating fluidized bed boilers [17], ... the Ca/S ratio is generally 2–2.5 [24], [25]. Consequently, the content of unreacted CaO and desulfurization product CaSO 4 in CFBCA is higher [18], [25], [26]. Due to the unique advantages of energy saving and emission reduction, …
The operating temperature range for a typical Circulating Fluidized Bed Boiler bed is generally maintained between 850°C and 900°C.This temperature range plays a critical role in ensuring the thorough calcination and decomposition of limestone, a pivotal process for generating calcium oxide.
As a highly efficient clean coal combustion technology, the circulating fluidized bed (CFB) boiler, which plays a significant role in environmental protection and energy saving, has been remarkably developed and widely popularized (Yue et al. 2009; Feng et al. 2003; Cen et al. 1997; Nie et al. 2008). Dongfang Boiler Group Co., Ltd. …
The chemistry, mineralogy, morphology, and particle size distribution were investigated in fly ashes from the burning of Datong (ShanXi, China) bituminous coal and the cofiring of Mideast high-sulfur petroleum coke (PC) with 30:70 (cal %) and 50:50 (cal %) blends of Datong bituminous coal in two commercial CFBC boilers. With the exception …
Desulfurizer in Circulating Fluidized Bed Boiler Zhong Huang, Jimiao Long, Lei Deng and Defu Che * ... The carbide slag exhibited a higher desulfurization e ciency than the limestone in the pilot ...
This study investigated that status of domestic and international furnace desulfurization and desulfurization characteristics of limestone for fluidized bed use depending on the...
The total fossil power unit in this event was made up of two sets of 310 t/h FW CFB boilers and a 100 MW double extraction condensing steam turbine.Further detailed, Fig. 1 presents the schematic diagram of the concrete operation procedures of the CFB boilers, which were mainly composed of three systems including the combustion …
With the stringent emission regulation taking effect, it is difficult for the conventional desulfurization technology in circulating fluidized bed (CFB) boilers to meet the requirements of ultralow SO 2 emission. Therefore, in this paper, the application of natural ultrafine limestone, with a Sauter mean diameter of less than 20 μm, was tested …
For the recycling of coal ash from the domestic circulating fluidized bed boilers, a lime-based sorbent with 0.2~0.4 mm size was prepared by using limestone powder and CFBC fly ash.
Furnace desulfuration in circulating fluidized bed boilers (CFBB) is an effective desulfurization technology with low cost. In inideal conditions, the …
Carbide slag is a waste residue during the production of acetylene. Due to its high content of Ca(OH)2, carbide slag becomes a potential alternative to limestone as the in-bed desulfurizer of circulating fluidized bed (CFB) boilers. In this study, the calcination and sulfation characteristics of carbide slag were investigated by three …
Coal slime can be disposed in quantity and fully utilized in a well-designed circulating fluidized bed (CFB) boiler, but the nitrogen oxides (NOx) and sulphur dioxide (SO2) emissions generated in the combustion of coal slime have contributed to serious atmospheric pollution. High Temperature & Post-combustion Technology, a novel and …
Furnace desulfuration in circulating fluidized bed boilers (CFBB) is an effective desulfurization technology with low cost. ... To improved desulfurization effect, limestone was added into raw coal, the mass mixing rate is 5%.Initial calcium/sulfur molar ratio is 1.46:1.Sulfur-fixing rate is 76.3%,CaO utilization rate is 52.3%,CaO sintering ...
Keywords: carbide slag; limestone; circulating fluidized bed; in-furnace desulfurization; SO2 1. Introduction Compared to the other main boiler types of coal-fired power plants, the circulating fluidized bed (CFB) boiler has many advantages, such as wide fuel adaptability, low-cost in-bed desulfurization, and low NOx emission. The CFB boiler ...
Circulating fluidized bed (CFB) boilers with wet flue gas desulfurization (WFGD) system is a popular technology for SO2 removal in the coal-fired thermal power plant. However, the long response time of continues emission monitoring system (CEMS) and the hardness of continuously monitoring the coal properties leads to the difficulties …
Semantic Scholar extracted view of "A sulphur capture model for circulating fluidized-bed boilers" by T. Mattisson et al. ... model for gas-solid particle flow in industrial scale circulating fluidized bed boiler combining with combustion and desulfurization (using limestone … Expand. PDF. 1 Excerpt;
The desulfurization process of circulating fluidized bed desulfurization technology involves the injection of flue gas from the bottom of the fluidized bed …
With the stringent emission regulation taking effect, it is difficult for the conventional desulfurization technology in circulating fluidized bed (CFB) boilers to meet the requirements of ultralow SO2 emission. Therefore, in this paper, the application of natural ultrafine limestone, with a Sauter mean diameter of less than 20 μm, was tested …
The application of semi dry desulphurization technology in a circulating fluidized bed boiler is introduced in the paper. The principle and technical characteristics of semi dry desulphurization ...
We compared the direct desulfurization behavior of four different domestic limestone samples (CaO fraction 40–55%, average particle size 37.5 μm) using a thermogravimetric analyzer (TGA) for experiments conducted under oxy-circulating fluidized bed (CFB) combustion conditions (temperature 600–850 °C, CO 2 60–95%). …
