Formation and removal characteristics of sulfuric acid mist in a wet flue gas desulfurization system

2016 ◽  
Vol 92 (3) ◽  
pp. 598-604 ◽  
Author(s):  
Danping Pan ◽  
Linjun Yang ◽  
Hao Wu ◽  
Rongting Huang ◽  
Yaping Zhang
Keyword(s):  
Sulfuric Acid ◽  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Acid Mist

scholarly journals A Sludge Cleaning Robot for Sulfuric Acid Tank

2011 ◽  
Vol 2-3 ◽  
pp. 419-422
Author(s):  
Tae Gyoon Lim ◽  
Soon Geul Lee
Keyword(s):  
Sulfuric Acid ◽  
Flue Gas ◽  
Drive Shaft ◽  
Flue Gas Desulfurization ◽  
Underwater Robot ◽  
Power Cable ◽  
The Real ◽  
Cleaning Robot ◽  
Series Of Experiments ◽  
Robot Body

This paper presents development of a cleaning robot for the sludge in sulfuric acid tank. The sulfuric acid is made during SOx capturing process, well known as flue gas desulfurization, and it has very strong corrosion characteristics. The cloud of micro dust in the flue gas settles as sediment in the acid tank. Because the fume produced by the sulfuric acid is very toxic, the sulfate sludge must be removed not by a worker but by an underwater robot having anti-corrosion capability. For this purpose, an underwater robot is developed with anti corrosion materials for its elements such as robot body, drive shaft, wheel, waterproofing seal, power cable, slurry pumping tube, etc. A series of experiments of sludge cleaning shows that the developed robot works well in the real sulfuric acid tank.

Application Status and Economic Analysis of Active Coke Flue Gas Desulfurization Technology

2012 ◽  
Vol 610-613 ◽  
pp. 1463-1468
Author(s):  
Ding Yang
Keyword(s):  
Sulfuric Acid ◽  
Economic Analysis ◽  
Flue Gas ◽  
Operating Cost ◽  
Raw Material ◽  
Flue Gas Desulfurization ◽  
Investment Cost ◽  
High Investment ◽  
Material Price

This paper analyzes the active coke FGD fundamental principles, structures and current applying situations, and calculates the initial investment active coke FGD and limestone-gypsum FGD. Moreover, it calculates the operating cost by raw material price and products price in China, and compares the initial investment cost and operating cost of the two FGD technologies in different usage period. This paper concludes that the high investment cost limits the wide application of active coke FGD, it can only be applied in some projects need sulfuric acid.

Waste / Low Quality Heat Recovery and Utilization With Low Temperature Economizers

2013 ◽  
Author(s):  
John M. Preston ◽  
W. Reid Watson ◽  
Charles B. Jones
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Low Temperature ◽  
Flue Gas ◽  
Heat Recovery ◽  
Heat Rate ◽  
Economic Feasibility ◽  
Dew Point ◽  
Plant Performance ◽  
Acid Mist

Modern combustion steam-electric plants are designed to recover as much heat as economically feasible from the combustion products. As a part of the continuing effort by utilities to increase plant efficiency, extracting low quality heat from the flue gas stream prior to discharge through the stack to the environment has become economically attractive. “Economic feasibility” is strongly dependent on the cost of the fuel as well as quality of the heat recovered. The economic feasibility of deploying low-temperature economizers to cool flue gas from coal-fired steam-electric plants to a temperature well below the sulfuric acid mist dew point is not commonly practiced but could have a number of salutary effects on unit operations including reduction in fuel use, reduction in water, reduction in fly ash resistivity upstream of cold-side electrostatic precipitators and enhanced mercury oxidation/capture. Using a theoretical 600 MW (nominal) coal fired facility an additional 30.8 MW of electrical output is available with the installation of a Low Temperature Economizer. This represents a 1% improvement in the plant heat rate with an attractive payback period. The components required for this heat recovery sub-system are readily available and the technology has matured to a point where uncertainties are minimized. In addition to improving the operation of the plant, Low Temperature Economizer can reduce emissions of SOx, NOx, Hg, PM and CO2. In a difficult regulatory environment reducing emissions while increasing plant performance is extremely beneficial. Furthermore Low Temperature Economizer lowers the volume of scrubber water required. Cooling the flue gas leaving the air heater below the acid mist dew point is not commonly practiced. The corrosion potential of the condensed sulfuric acid is a major materials selection/maintenance challenge as is the potential for gas-side fouling of the heat exchange surface with fly ash.

scholarly journals Adsorption Characteristics of Sulfuric Acid Mist on Fly Ash in Low-low temperature Flue Gas System

2017 ◽  
Vol 142 ◽  
pp. 3307-3312 ◽  
Author(s):  
Yubo Zhang ◽  
Yu Yan ◽  
Jianhua Liu ◽  
Qingwen Qi ◽  
Lei Deng ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Low Temperature ◽  
Flue Gas ◽  
Adsorption Characteristics ◽  
Gas System ◽  
Acid Mist
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