January 23, 2014
Sumitomo Heavy Industries Environment Co., Ltd. (Headquarters: Shinagawa-ku, Tokyo; President: Hitoshi Ushiyama; Wholly-owned subsidiary of Sumitomo Heavy Industries; hereinafter referred to as “SHIE”) announced today that its Sloped-Ejection type Grit Jet Pump “Sumijetter II” received the Chairman’s Award at the 2013 (34th) Excellence in Energy Efficient Equipment Ceremony which was held by the Japan Machinery Federation.
This award is generally bestowed upon companies and organizations that are deemed to have contributed to the promotion of efficient energy use through the development and practical use of industrial equipment that exhibit a high-level of energy efficiency.
Jet-pump based grit lifters are typically used inside the grit chambers of wastewater treatment plants. It is a device that uses pressurized water to remove and transfer the built-up grit that has settled in the chamber. Systems that incorporate this device rather than mechanical grit lifting systems are being adopted more frequently in recent times because it helps alleviate issues relating to the many number of mechanical equipments, hard troubles of operation and maintenance, odor, and complicated operating conditions. One problem, however, with the pressurized water pump is that it requires a significant amount of power. Moreover, as the need to develop measures to prevent global warming and improve energy efficiency has grown, calls for the reduction of the overall power requirements of such devices has also gotten louder.
During the development of the Sloped-Ejection type Grit Jet Pump “Sumijetter II”, SHIE engineers looked to optimize the structure of the jet pump eject nozzles to reduce the loss of pressure. As a result, the new device is able to reduce power consumption by approximately 40% as compared to conventional technologies*. This result also contributed to upfront cost savings as the new system requires a lower capacity high-pressure water pump and less electrical equipment, as well as lower overall running costs.
These significant breakthroughs were positively reviewed by the Japan Machinery Federation and as a result, the Sloped-Ejection type Grit Jet Pump “Sumijetter II” received the Chairman’s Award at the ceremony. The Sumitomo Heavy Industries Group will continue in its efforts to contribute towards environmental protection through its products and manufacturing activities.
* Traditional technologies – Technical Manual for a Grit Pump System that Utilizes an Accumulated Grit Nozzle; Published by the Japan Institute of Wastewater Engineering and Technology; March 2005
System Configuration Diagram