Patent ID: 11001967

Abstract:
A pulp-digester screen cleaner having a pneumatic actuator with a cylinder and a rod coaxially disposed within the cylinder. An actuator mounting plate is used to mount the actuator outside of a pulp-digester screen housing pipe. A rod seal has a body disposed on the pipe that prevents any loss of fluid or pressure, yet allows the rod to pass into the pipe. The cylinder contains all of the mechanics of the pneumatic actuator and can be easily serviced without draining the digester. The rod is disposed through a first aperture of each of a pair of scrapers. A treated edge of each of the pair of scrapers varies to match different digester screen types and patterns. The present pulp-digester screen cleaner eliminates the need for chemical cleaning or other mechanical cleaning solutions. It will also improve pulp quality, increase pulp production, and promote overall digester efficiency.