동공이송식 펌프 제조업체인 NOV Mono사가 웨일즈 남서부 펨브룩셔 주에 위치한 Dwr Cymru Crymych 처리 플랜트에 추가 보호등급을 제공하기 위해 일괄공급형 프로젝트를 인도했다. 이 프로젝트는 공장이 어떤 유동조건 하에서도 처리된 하수의 품질을 보증할 수 있도록 보장하기 위해, 현재 하수 전송업무에 사용되고 있는 EZstrip 동공이송식 펌프에 중점을 둔다.

 

 

UK wastewater treatment plant receives progressing cavity pump to help improve water quality
    
 NOV Mono, a progressing cavity pump manufacturer, has delivered a turnkey project to provide an extra level of protection for the Dwr Cymru Crymych treatment plant in Pembrokeshire, a county in the Southwest of Wales. The project centers on an EZstrip progressing cavity pump, which is now being used on sewage transfer duties, to ensure that the plant can guarantee the quality of the treated sewage under any flow conditions.

 

Powered by a 4-kW motor and operating at a duty speed of 226 rpm, the EZstrip pump draws sewage from the center of the final settlement tank at the facility. It pumps the sewage back up to the head of the treatment system, from where it returns back through the filter bed to the final tank. This ensures that the plant's biological filters do not dry out and remain effective, even in very low flow conditions. This in turn helps to maintain the quality of the final sewage within the required boundaries, at all times.

 

Mono was approached because of its ability to provide a full turnkey package that covered all the stages -- from initial site survey, design and manufacturing to full mechanical and electrical installation. Working closely with the project's civils contractor, Mono installed the pump, suction pipe, rising main, control panel, and overpressure and high-temperature devices, and completed the final testing and commissioning. Both the electrical and mechanical work were handled by Mono, who has since completed a similar project at the Dwr Cymru Lamphey treatment plant.

 

The progressing cavity pump features Mono's revolutionary EZstrip design that allows it to be maintained in place. This provides a quick and easy way to disassemble, de-rag and maintain the pump without the need to disconnect suction and discharge pipework. This reduces a typical day-long maintenance operation down to just 30 minutes. Available in cast iron or stainless steel and with a choice of rotor and stator materials, the pump requires only basic tools to maintain and can be retrofitted into existing installations where a Mono Compact C pump has previously been used.

 

[출처 = Water World / 2014년 9월 22일]