Tunnel and Conveyor Sumps

Tunnel and conveyor sumps collect water and slurry runoff from coal conveyors, tunnels, and transfer points in power plants. These sumps prevent flooding, protect equipment, and ensure safe, dry work areas throughout material handling systems.

Challenges:
These sumps often accumulate fine coal dust, debris, and abrasive slurry that settles quickly and clogs pumps. Limited access for cleaning and maintenance, combined with continuous operation, demands pumps that can handle solids-laden water reliably and with minimal attention.

Solution:
Hevvy/Toyo’s agitator-equipped submersible pumps are purpose-built for dirty sump applications. Their powerful mixing action keeps solids suspended, ensuring complete sump drainage and preventing buildup. Heavy-duty construction and simple, modular design make them easy to maintain, reducing downtime and keeping conveyor systems safe and operational.

FGD Washdown Sumps

Flue Gas Desulfurization (FGD) systems scrub sulfur dioxide from exhaust gases in coal-fired plants. Washdown sumps collect slurry containing lime, gypsum, and residual solids from these systems. Efficient sump pumping is essential to maintain clean, safe, and compliant operations.

Challenges:
FGD slurries are chemically aggressive and highly abrasive, causing corrosion and erosion in conventional pump materials. pH fluctuations and dense solids often lead to clogging and seal damage. Downtime for cleaning or repair directly impacts environmental compliance and plant uptime.

Solution:
Hevvy/Toyo pumps designed for FGD service use corrosion- and abrasion-resistant alloys and elastomers. Their recessed impellers minimize contact with solids, and agitators keep materials in suspension for complete sump cleaning. The result is reliable, chemical-resistant performance that maintains sump integrity and minimizes manual intervention.

Coal Pile Runoffs

Coal pile runoff systems manage water that drains from coal storage areas during rainfall or washdown operations. This runoff often contains coal fines, sediments, and hydrocarbons, which must be collected and treated to prevent contamination of surrounding waterways.

Challenges:
Runoff water is highly abrasive and varies in solids concentration depending on rainfall or operational activity. Pumps must handle fluctuating flows and dirty water containing fine coal particles without clogging or premature wear. Maintaining reliability in outdoor, exposed environments adds further complexity.

Solution:
Hevvy/Toyo’s submersible slurry pumps are built to handle variable, abrasive coal runoff streams. Their recessed impellers pass solids easily, while agitators prevent sediment buildup in sumps or collection pits. Corrosion-resistant materials and mechanical seal protection ensure reliable, low-maintenance operation even in the harshest outdoor environments.

Fly Ash and Bottom Ash

Fly ash and bottom ash are the by-products of coal combustion in thermal power plants. Fly ash consists of fine particles carried by flue gases, while bottom ash settles at the furnace base. Both need to be collected, transported, or disposed of safely to comply with environmental regulations and maintain plant efficiency.

Challenges:
These ashes are abrasive, dense, and often mixed with water to form a heavy slurry that wears out pump components quickly. Variable solids concentration and temperature fluctuations make consistent flow difficult. Traditional pumps experience rapid erosion, clogging, and seal failures in ash-handling systems.

Solution:
Hevvy/Toyo’s submersible and horizontal slurry pumps feature hardened materials and open or recessed impellers designed for abrasive service. Their high-chrome wet ends, heavy-duty bearings, and optional agitators handle high-solid ash slurries with ease. The result is longer service life, reduced maintenance, and dependable ash management in demanding power plant conditions.