Why Use Circular Stockyard System to Store Coal?

Sep 22, 2023Keywords: Circular Stockyard System, Coal Stockyard, Circular Stockyard Coal Storage System

Coal is the main energy source for thermal power generation. It is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus and other elements. It is also an important raw material for metallurgy, chemistry and other industries. With the continuous improvement of coal enterprises' requirements for automated production and the improvement of environmental protection awareness, the traditional open-air coal storage method has gradually been eliminated, and coal storage in silos or bulk material stockyards has been widely developed and used. Today we mainly understand circular stockyard coal storage system to store coal.

Introduction to Circular Stockyard

The top of circular stockyard is a spherical grid structure, and the bottom is a reinforced concrete retaining wall. The advantage of the spherical grid structure is that it can build large-span and large-diameter covered sheds. It is an extremely stable rigid, lightweight, truss-like structure composed of geometrically patterned interlocking struts. The circular raw material stockyard uses a central reclaimer to complete the stacking and reclaiming operations. The diameter of circular stockyard is generally between 60 and 120m. The cantilever stacker on top of the center column can rotate and tilt within 360 degrees around the center column.

circular coal yard
Circular Coal Storage Yard Application

With the increasing requirements for environmental protection, the control of dust pollution in coal storage yards of thermal power plants has been put on the agenda. Circular coal storage yards are increasingly used by power plants due to their advantages such as large reserves, high environmental protection, fully automatic operation, and reduced coal loss during storage. The diameter of circular coal storage yard can be comprehensively determined based on technical and economic analysis based on site conditions, geological construction conditions, storage capacity requirements and project investment.

circular coal yard
Environmental Protection of Circular Coal Storage Yard

As the environmental protection requirements for industry are getting higher and higher, circular stockyards have significant advantages in this regard. The reason is that it is a sealed system itself, and it takes many measures to control dust:
(1)The stacking arm adopts a pitching mechanism, and the stacking arm tilts down when starting to stack, thus reducing the height at which the coal falls;
(2)Use spray dust suppression when stacking coal;
(3)When stacking coal, the stacking arm drops coal along the original coal pile, so the height of coal dropping is very small and the dust is very small;
(4)Although natural ventilation is adopted, the height of the ventilation holes on the grid has been scientifically calculated so that the gravity of the coal dust at this point is greater than the buoyancy, and dust overflow will not occur.

Economic Efficiency of Circular Coal Storage Yard

1.The circular coal storage yard occupies a small area and has high site utilization rate.
2.Easy, fast and safe installation.
3.Advanced and reliable equipment with high degree of automation.
4.Low investment cost, stacking and reclaiming operations can be carried out continuously and simultaneously.

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