Abstract
The existence of Submerged Scrapper Conveyor (SSC) in coal-fired power plant is to handle the by-product of bottom ash. However, soot-blowing will be performed sometimes, in order to remove slag formed at the boiler furnace wall. Thence, this lead to a sudden loading of large amount of slags and bottom ash at SSC after soot-blowing, causing SSC conveying system to jam and conveying chain breakage. In this paper, a new SSC design with additional crushing system is proposed. By implementing the new design proposed, it is expected to improve the overall current performances, and to reduce the trip issue of SSC in coal-fired power plant. The new 3D model of SSC is designed, and stress-strain simulation of the model is analysed by using software of PTC Creo Parametric. Final cost and safety factor analysis of model is made to prove its validation.
Highlights
Introduction and backgroundThe Submerged Scrapper Conveyor (SSC) is known as to convey and remove the by-product of combusted pulverized coal, bottom ash and slag
The SSC conveyor drag chain consists of flights, which are located between two parallel length of chain that scrape along the lower surface of the water impounded trough
The setting of the load is done on the roll crushers, in order to illustrate the falling process of slag after soot blowing process performed at boiler furnace wall
Summary
The Submerged Scrapper Conveyor (SSC) is known as to convey and remove the by-product of combusted pulverized coal, bottom ash and slag. It is normally installed at the bottom of boiler. In this soot blowing process, soot blowers are used by using high pressure steam, which impacts on a residue, and leads to its fracture [4] In this case, residue removal occurs due to mechanical and thermal stresses, induced in the residue [5, 6]. It is aimed to enhance the current SSC design by adding extra feature of crushing system, to reduce the falling rate and size of slag into SSC after soot blowing process. The project discussed in this paper will focus on PTC Creo Software for designing and stress-strain analysis simulation
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