Wood Chip Tunnel

Wood chip tunnels are used to convey chips from storage piles to the pulping area using conveyor systems. During rain or snowmelt, water collects in tunnel sumps, carrying fine wood particles, bark, and debris that must be pumped out to prevent flooding and maintain safe operation.

Challenges:
Tunnel sumps accumulate fibrous, stringy material that entangles impellers and reduces flow. The mixture of organic solids and debris makes clogging common, while restricted access in tunnels complicates maintenance. Pumps must handle large solids, operate reliably in confined spaces, and resist wear from wood fiber abrasion.

Solution:
Hevvy/Toyo’s agitator-equipped submersible pumps are ideal for fibrous, debris-laden tunnel sumps. Their open impeller and large-passage designs allow wood chips and fibers to pass without clogging. With durable construction, simple servicing, and continuous-duty performance, they keep tunnels clear, safe, and free of overflow even in heavy runoff conditions.