From a CFB reactor to a CFB boiler – The review of R&amp;D progress of CFB coal combustion technology in China

Yue, Guangxin; Cai, Runxia; Lü, Junfu; Zhang, Hai

doi:10.1016/j.powtec.2016.10.062

Cited by 171 publications

(49 citation statements)

References 7 publications

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“…[19][20][21] There are few studies on resource benefits under industrial linkages, and it is impossible to comprehensively analyze the actual effects of energy input and output，and existing research on resource efficiency is mainly concentrated at the national level, while research based on industry or enterprise level is relatively small, so the operability of the policy is low. [22][23][24] Research on resource efficiency brought about by the promotion of CFB is mostly carried out from a certain perspective and a certain partial perspective. Liu et al believe that the use of CFB low calorific value coal power generation technology will fully generate 170 million tons of low calorific value coal for power generation, and will replace 100 million tons of high calorific value raw coal for use in industries and people's livelihood.…”

Section: Domestic and Foreign Research Status On Cfb Resource Efficmentioning

confidence: 99%

“…When using the input‐output method to explore the resource benefits under the concept of recycling, they usually divide the waste production and recycling links, and only consider the input, output, and resource benefits of an industry . There are few studies on resource benefits under industrial linkages, and it is impossible to comprehensively analyze the actual effects of energy input and output，and existing research on resource efficiency is mainly concentrated at the national level, while research based on industry or enterprise level is relatively small, so the operability of the policy is low …”

Section: Introductionmentioning

confidence: 99%

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What are the resource benefits of circulating fluidized bed power generation technology? Take some key thermal power units in China as an example

2020

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Summary Efficient use of natural resources is an important part of China's energy industry to achieve sustainable development. The promotion of circulating fluidized bed (CFB) boilers is an important way to save coal and other resources from the source. This article first analyzes the connotation of resource benefits generated by CFB boilers. From the perspective of CFB technology used for low‐calorific value coal recycling, coal recovery rate and sustainable development of coal resources (mainly coal can extend mining time), the resource benefits obtained by CFB are analyzed. The resource benefits obtained were analyzed. Second, based on the input‐output nonlinear optimization theory, aiming at maximizing the resource benefits of CFB technology, constructing a CFB technology resource benefit nonlinear optimization model, measuring output benefits‐added value, that is, the extension time of coal years and coal mining recovery rate increased value. Finally, based on the installed capacity data of China's CFB technology units from 1990 to 2015, the model designed two scenarios for China's future CFB technology development, and predicted China's 2020 CFB machine assembly capacity and power generation. On this basis, by analyzing the degree of coal resource conservation and the extension of the exploitable years, the model derives the resource benefits generated by CFB technology under different scenarios and the impact on the sustainable development of China's coal resources. These conclusions provide a quantitative basis for China's future CFB technology development.

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Section: Domestic and Foreign Research Status On Cfb Resource Efficmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

What are the resource benefits of circulating fluidized bed power generation technology? Take some key thermal power units in China as an example

2020

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“…CFB boilers have to be equipped with expensive gas clean systems including a flue gas desulphurization (FGD) tower and a selective catalytic reduction (SCR) reactor, which leads to higher investment and operation costs. The additional costs mean traditional CFB boilers no longer have the advantage of lower cost pollution control [52].…”

Section: Background Of Ultra-low Emission Cfb Boiler Technologymentioning

confidence: 99%

“…Two 220 t/h CFB boilers in Changzhi and Linqing have achieved the goal of ultra-low emission of NO x and SO 2 by improving the cyclone efficiency to increase the bed quality, reducing the average bed material size and increasing the solid circulation rate [52]. The fuel of these two projects is shown in Table 5, the main operation parameters are shown in Table 6, with the cut size of fly ash particle decreasing from 22 μm to 12 μm.…”

Section: Ultra-low Emission Cfb Boiler Technology Practicesmentioning

confidence: 99%

Progress of circulating fluidized bed combustion technology in China: a review

Cai

Lyu

et al. 2017

Clean Energy

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Circulating fluidized bed (CFB) technology plays an important role in the utilization of low-grade coal in China. This article reviews CFB combustion technology development in China and summarizes recent achievements. Since 1990 Chinese engineers and researchers have been undertaking work to improve CFB boiler technology. A completely novel CFB boiler design theory was developed and used in the domestic manufacturing of CFB boilers with various capacities. China is the largest supplier and customer of CFB boilers in the world due to the widespread use of CFB boilers. In 2007, the lower energy consumption CFB technology was successfully developed by re-specifying the fluidization state, which reduced the power consumption of forced fans and solved the potential erosion problems on the water wall. Afterwards, in order to increase the electric power generation efficiency, the supercritical CFB (SCCFB) boiler was developed and the first 600 MW SCCFB boiler was demonstrated and put into commercial operation in 2013. The success of the technology is evident with over 80 SCCFB boilers on order with capacities of 350 MW to 660 MW. Chinese scientists and engineers are also developing technology to lower the emissions of CFB combustion to meet the requirements of China's strict emission regulations. This emission reduction is through high-efficiency desulfurization by limestone injection into the furnace and low NO x combustion, ultra-low emission of SO 2 and NO x in the furnace can be realized by improving the bed quality and increasing the solid circulation rate. There is currently further research and design development being undertaken to develop a 660 MW ultra-supercritical CFB (USCCFB) boiler. The new boiler is expected to be operational before 2020 resulting in higher efficiency and lower energy consumption and emissions.

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“…Circulating fluidized bed (CFB) technology has demonstrated its ability to efficiently utilize a wide variety of fuels, including high sulfur coal to coal gangue and coal slurries [1]. Taking coal-water slurries containing petrochemicals fuels for example, through experiments and calculations the advantages are much lower anthropogenic emissions and ash residue, low cost of the components, positive economic performance indicators of storage, transportation, and combustion, as well as higher fire and explosion safety [2,3].…”

Section: Introductionmentioning

confidence: 99%

On the Flexible Operation of Supercritical Circulating Fluidized Bed: Burning Carbon Based Decentralized Active Disturbance Rejection Control

Zhang

Xue

et al. 2019

Energies

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Supercritical circulating fluidized bed (CFB) is one of the prominent clean coal technologies owing to the advantages of high efficiency, fuel flexibility, and low cost of emission control. The fast and flexible load-tracking performance of the supercritical CFB boiler-turbine unit presents a promising prospect in facilitating the sustainability of the power systems. However, features such as large inertia, strong nonlinearity, and multivariable coupling make it a challenging task to harmonize the boiler’s slow dynamics with the turbine’s fast dynamics. To improve the operational flexibility of the supercritical CFB unit, a burning carbon based decentralized active disturbance rejection control is proposed. Since burning carbon in the furnace responds faster than throttle steam pressure when the fuel flow rate changes, it is utilized to compensate the dynamics of the corresponding loop. The parameters of the controllers are tuned by optimizing the weighted integrated absolute error index of each loop via genetic algorithm. Simulations of the proposed method on a 600 MW supercritical CFB unit verify the merits of load following and disturbance rejection in terms of less settling time and overshoot.

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From a CFB reactor to a CFB boiler – The review of R&D progress of CFB coal combustion technology in China

Cited by 171 publications

References 7 publications

What are the resource benefits of circulating fluidized bed power generation technology? Take some key thermal power units in China as an example

What are the resource benefits of circulating fluidized bed power generation technology? Take some key thermal power units in China as an example

Progress of circulating fluidized bed combustion technology in China: a review

On the Flexible Operation of Supercritical Circulating Fluidized Bed: Burning Carbon Based Decentralized Active Disturbance Rejection Control

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