Coal adhesion, wall hanging and material blockage in raw coal bunkers are common operational challenges for the coal handling systems of thermal power plants. Moist pulverized coal tends to stick to bunker walls, resulting in poor material flow, false material level indication and equipment shutdowns, which impair stable unit operation. Installing Ultra-High Molecular Weight Polyethylene (UHMWPE) Liners inside coal bunkers prevents pulverized coal adhesion via self-lubricating properties, making it a practical solution adopted in the thermal power industry to optimize coal bunker operating conditions.

Conventional steel bunker walls feature a high friction coefficient. When exposed to high-humidity fine raw coal, repeated coal buildup and adhesion occur. This not only increases the workload of manual blockage clearing but also brings significant safety hazards. Ultra-High Molecular Weight Polyethylene (UHMWPE) Liners boast outstanding self-lubricating physical properties with smooth, dense surfaces and a low friction coefficient, eliminating the physical conditions for pulverized coal adhesion. Compared with traditional lining materials such as steel plates and cast stone, these liners are non-absorbent and resist material accumulation. No caking or wall sticking will occur even with long-term exposure to wet coal and coal slurry, keeping the inner walls of coal bunkers smooth and clean continuously.

In actual power plant operation and maintenance, retrofitting with Ultra-High Molecular Weight Polyethylene (UHMWPE) Liners requires no complicated reconstruction and fits various structures of raw coal bunkers, coal chutes and transfer chutes. Their stable self-lubricating performance ensures smooth downward flow of raw coal, effectively eliminating bridging and bunker blockage, cutting unplanned shutdowns, lowering maintenance costs and safety risks caused by manual bunker cleaning. It serves as a reliable technical renovation solution to improve efficiency and simplify equipment maintenance for thermal power plant coal handling systems.

This article is compiled by Henan Jinhang Engineering Plastics Co., Ltd. (www.upeplastic.cn). Editor-in-Charge: Jinhang. The company specializes in the R&D and production of Ultra-High Molecular Weight Polyethylene (UHMWPE) Liners. Reproduction is permitted provided the source is cited.