scholarly journals Features of formation and reduction of sulfur dioxide emissions when burning brown coal in boilers with liquid slag removal

2020 ◽  
Vol 209 ◽  
pp. 03012
Author(s):  
Vladimir Elsukov ◽  
Svetlana Latushkina
Keyword(s):  
Sulfur Dioxide ◽  
Calcium Sulfate ◽  
Liquid Slag ◽  
Boiler Unit ◽  
So2 Emissions ◽  
Slag Removal ◽  
Boiler Load ◽  
Power Sources ◽  
Sulfur Dioxide Emissions ◽  
Liquid Slag Removal

The paper considers the influence of technological factors (design of the boiler-unit, load, air excess, the number of working dust collecting systems) on the formation and reduction of sulfur dioxide emissions in boilers with liquid slag removal. Understanding of this influence can be used both at many operating heat and power sources, and in the development of new combustion technologies. The long-term experience of burning brown coals of the Kansk-Achinsk basin (KAC) at CHPP-6 in Bratsk in boilers of the BKZ-320-140 PT type is studied and analyzed. The analysis uses the results of various thermodynamic and industrial studies of the sulfur dioxide formation during the combustion of KAC, including those carried out by the authors. They identified the temperature and structural zones of the boiler unit, where the resulting reaction of the sulfur dioxide transition to calcium sulfate occurs. It was found that such a zone is the upper part of the cooling chamber, where the indicated transition occurs at temperatures of 1500 ÷ 1400 K. It was found that SO2 emissions rise with an increase in the boiler load and air excess. They also depend on the number of dust systems and their combination (determining the turbulization of combustion processes). A technological mechanism for the sulfur dioxide transition to calcium sulfate for the operation of boilers with liquid slag removal is proposed. Regime and constructive measures are proposed to reduce emissions of sulfur dioxide.

Increasing the resistance of the hearth of fireboxes of steam boilers with liquid slag removal

Refractories ◽  
1965 ◽  
Vol 6 (11-12) ◽  
pp. 593-596
Author(s):  
I. A. Ol'khovskii ◽  
V. S. Zverev ◽  
L. A. Krinichanskaya
Keyword(s):  
Liquid Slag ◽  
Slag Removal ◽  
Steam Boilers ◽  
Liquid Slag Removal

scholarly journals Low-carbon governance, fiscal decentralization and sulfur dioxide emissions: Evidence from a quasi-experiment with Chinese heavy pollution enterprises

2022 ◽  
Author(s):  
Ping Guo ◽  
Jin Li ◽  
Jinsong Kuang ◽  
Yifei Zhu ◽  
Renrui Xiao ◽  
...  
Keyword(s):  
Sulfur Dioxide ◽  
Environmental Governance ◽  
Fiscal Decentralization ◽  
Mediating Effect ◽  
Low Carbon ◽  
So2 Emissions ◽  
Firm Level ◽  
Sulfur Dioxide Emissions ◽  
Level Data ◽  
Heavy Pollution

Abstract This paper investigates the effects of enterprise environmental governance under low-carbon pilot policies in China with a difference in differences (DID) design. In examining the development of these policies, we focus on exploring their effects on sulfur dioxide emissions of heavily polluting enterprises based on prefectural city- and firm-level data from 2003-2014. Overall, the policies significantly increased enterprise SO2 emissions, and the underlying reason being that investments in CO2 control crowded out investment in SO2 control in enterprises in low-carbon pilot regions. We also find that the implementation of low-carbon pilot policies resulted in greater SO2 emissions from state-owned enterprises and enterprises in western regions than from non-state-owned enterprises and those in eastern regions. It is further found that fiscal decentralization and the associated mediating effect of market segmentation promote enterprises' CO2 control and inhibit their SO2 control. This study helps us re-examine the overall environmental effects of low-carbon policies and has implications for the revision and improvement of environmental governance policies in developing countries.

scholarly journals Relationship between economic growth and SO2 emissions - based on the PSTR model

2019 ◽  
Vol 10 (2) ◽  
pp. 137-156 ◽  
Author(s):  
Ke Wu
Keyword(s):  
Economic Growth ◽  
Economic Development ◽  
Sulfur Dioxide ◽  
Positive Impact ◽  
Threshold Value ◽  
Smooth Transition ◽  
Eastern Region ◽  
So2 Emissions ◽  
Sulfur Dioxide Emissions ◽  
The Impact

Abstract In this paper, we used the panel smooth transition model (PSTR) to study the nonlinear relationship between sulfur dioxide emissions and economic growth in the three regions of China’s eastern, middle and western regions, based on panel data from 31 provinces and autonomous regions in China from 2005 to 2017. And calculated the elasticity of the impact of total export-import volume and urbanization rate on emissions. The empirical results indicate that economic development and sulfur dioxide emissions are positively correlated in the three regions of East, Middle and West. In the eastern region, when the economic scale is lower than the threshold value, it has a negative impact on SO2 emissions; but when it is higher than the threshold value, it has a positive impact on SO2 emissions, and the smoothing rate between the two regime is slow. The per capita GDP in the middle and western regions is weakly positively correlated with SO2 emissions. When the economic scale reaches the threshold value, its positive impact on SO2 emissions will increase, and economic development will further increase emissions.

Calculation of a Direct-Flow Coal Gasification Process with Liquid Slag Removal

2020 ◽  
Vol 54 (5) ◽  
pp. 269-273
Author(s):  
M. Kh. Sosna ◽  
Yu. A. Sokolinskii ◽  
D. S. Khudyakov ◽  
A. L. Lapidus
Keyword(s):  
Liquid Slag ◽  
Coal Gasification ◽  
Direct Flow ◽  
Slag Removal ◽  
Gasification Process ◽  
Liquid Slag Removal

scholarly journals Energy Costs of Reducing Industrial Sulfur Dioxide Emissions in China

2021 ◽  
Vol 13 (19) ◽  
pp. 10726
Author(s):  
Haiying Liu ◽  
Ying Zhong ◽  
Chunhong Zhang
Keyword(s):  
Sulfur Dioxide ◽  
Emission Reduction ◽  
Environmental Regulations ◽  
Green Technology ◽  
Energy Costs ◽  
So2 Emissions ◽  
Sulfur Dioxide Emissions ◽  
Optimal Energy ◽  
Industrial Sectors ◽  
Energy Inputs

With increasing environmental pollution, China has instituted corresponding environmental regulations to address environmental challenges. Estimating the costs of such environmental regulations can help governments to formulate rational environmental policies. This review estimates the costs of environmental regulations based on a novel perspective of energy consumption. Using panel data for Chinese provincial regions in 2006–2015, we developed a non-parametric directional distance function and estimated different optimal energy inputs based on data envelopment analysis under two scenarios, namely, those with and without emission reduction constraints. The gap between the two groups of optimal energy inputs facilitated the estimation of the energy costs associated with reducing SO2 (sulfur dioxide) emissions in China’s industrial sectors. The results suggest that approximately 13.40 tons of standard coal were required to reduce SO2 emissions by 1 ton, highlighting the discrepancy between energy savings and emission reduction. The energy costs of SO2 emission reduction were the highest in West China (18.63), followed by those in Central and Northeast China; meanwhile, those in East China were the lowest (9.91). The large differences between the energy costs of emission reduction in different regions indicated that economically underdeveloped areas have scope for improvement with respect to energy structures and innovation in the green technology field.

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