Anglo American have engaged Dowdens Pumping & Water Treatment's [Mackay] Engineering Department & Fabrication Workshop to rectify an issue with a new valve station installation that was experiencing water hammer, resulting in the longwall mining operation being suspended at their Grasstree Coal Mine, located at Middlemount in the centre of the Bowen Basin, QLD.
Underground mines require water management systems in place to manage working water that is utilised for production, dust suppression, hydraulic jacks etc. Mines employ various methods of underground water transportation systems including Longwall Boost Pump Stations & filtered water from the mine surface networks. The filtered water system is an important piece of infrastructure for underground coal mine providing clean water for dust suppression & feeding the powerful hydraulic piston pumps that are used to jack up the roof in the longwall mining process.
When water is fed into an underground mine it is received at a very high pressures due to the vertical drop to the mine workings. This pressure needs to be reduced & controlled to levels that can be safely managed in the underground operations. Dowdens Pumping & Water Treatment has provided Grasstree Coal Mine with several Pressure Reducing Valve Stations over the life of the mine, enabling reliable & trouble free operation.
Responding to the urgent help request from Grasstree Mine, Dowdens immediately travelled to site to undertake system 'fault finding' & begin planning the delivery of a timely & cost effective solution to the problem.
As a direct result of Dowdens Pumping & Water Treatment's long standing & responsive working relationship with Anglo American's Grasstree underground coal mine, the Dowdens Engineering Department was called on to assist with a new valve station installation that was experiencing water hammer resulting in the longwall mining operation being suspended. Dowdens Engineers attended the mine site & listened/observed the problems that were being experienced such as pressure surges & water hammer in the feed pipes leading to the longwall operation.
Dowdens Engineering Dept. designed & developed a Pressure Setting Spool sized specifically to meet the specific duty required. The spool was custom designed using engineered fluid mechanics to reduce the pressure before it entered the valve station, taking part of the load off the station. Pipe supports were also engineered to provide a secure installation of the station.
The timeline to find the solution & manufacture the components was very tight. Engineering - Concept Design - Drawings & In-House Fabrication of the unique Pressure Setting Spool Piece [with roof bolt anchoring points] were completed & delivered to Grasstree Mine within 5 days from the first site meeting! No other pumping / manufacturing / engineering firm in Queensland was able to deliver such an all-encompassing product solution in the above mentioned time-frame.
Dowdens design philosophy for this project was: Fast Turnaround - Cost Effectiveness - Ease of Installation - Simple Plant Operation - Plant Reliability & Reduced Maintenance.
The unique system required at Grasstree Coal Mine needed to address the following issues:
Key Project Features:
Dowdens Pumping & Water Treatment are proud to announce securing Australia-wide exclusivity of the MIRACELL Rotating Biological Contactors (RBCs) Sewage Treatment Systems. MIRACELL RBCs are the systems are most preferred globally by customers who clearly understand the economic value in purchasing an expertly designed and professionally built Sewage Treatment System!
MIRACELL RBC Sewage Treatment Systems are fully automatic, modular designed Rotating Biological Contactor (RBC) treatment systems specifically designed for sewage treatment applications in capacities ranging from 50 to 20,000 equivalent people (treatment of between 10m3 up to 4000m3 / day). Representing the ultimate in Sewage Treatment Systems, a MIRACELL RBC consumes as little as one fifth of the electricity and requires as little as one third of the space of its competitors based on the activated sludge technology.
Having exclusive rights to MIRACELL RBCs has increased Dowdens capacity to design, supply, install and service large scale Sewage Treatment Systems suitable for use by municipalities, caravan parks, mining camps and a wide range of other commercial / industrial sites where onsite sewage treatment is needed.
Dowdens Pumping & Water Treatment employs an experienced team of WTP and STP Project Specialists comprising of Mechanical and Process Engineers, Project Managers, Draftsmen with 3D Autocad skills and qualified installation and service crews, together with our in-house workshop facilities for the fabrication of steel and stainless steel skids and bases, Dowdens has little to nil reliance on outside contractors when delivering complex Water and Sewage Treatment systems - in essence we are a 'one-stop pumping, water and sewage treatment shop'.
Examples of Dowdens Water and Sewage Treatment projects:
Kurrajong Pastoral Company have engaged Dowdens Pumping & Water Treatment [Rockhampton branch] to design, install and commission a large solar powered stock watering system on one of their rural properties located near Alpha, QLD.
The solar powered stock watering system is required to transfer onsite bore water to existing water storage tanks. These water tanks are used by Kurrajong Pastoral Co. primarily to water the 1,000 head of cattle onsite.
Kurrajong Pastoral Co. specified each head of cattle was to be allocated a minimum of 10gal per day (approx. 45L/day), meaning the pumping system needed to deliver over 10,000gal per day (45,461L).
Water is pumped from the 5" onsite bore (pump set at 35m) with 75m total head into 3 storage tanks via poly line pipe.
The Kurrajong Pastoral Co. solar pumping system was designed to keep overall operating costs down whilst still delivering a regular supply of water to cattle with negligible ongoing service or labour required. Dowdens Pumping & Water Treatment [Rockhampton] designed the system to be more cost effective than running additional wiring and connecting any onsite pumps to mains power.
The new solar pump replaces a B Head Mono Column and Shaft pump - originally powered by an onsite diesel engine. Dowdens solar powered system has thereby significantly lowered the environmental footprint of the entire pumping system.
Key Project Features:
Dowdens Pumping & Water Treatment is proud to announce we have attained full accreditation as a supplier on the Achilles First Point Supply base (FPS).
Achilles FPS is a supplier management system for the oil & gas sector in the Asia Pacific region which enables businesses to use Achilles' proven supplier pre-qualification system to identify, pre-qualify and assess suppliers for tender opportunities whilst minimising risk within their prospective supply chains.
The Achilles FPS Accreditation positions Dowdens Pumping & Water Treatment as a trusted supplier to many esteemed global corporations involved in the oil & gas sector including: Shell, Clough, Santos, Arrow Energy, Vale, BHP Billiton, Anglo American and Exxon Mobil.
Having Achilles FPS accreditation means Dowdens customers have access to accurate and up-to-date information on our safety standards and compliance, reliable visibility of risk across our supply base and reduced exposure to non-compliance with both projects and products supplied.
A Rockhampton regional cattle grazier (located in Kalapa, QLD) employed Dowdens Pumping & Water Treatment [Rockhampton] to design, install and commission an economical yet efficient pumping solution to supply water for 50 head of cattle in a remote paddock.
The paddock in question has no access to mains electricity or town water so Dowdens needed to find a way to efficiently pump the water drawn from a 12m deep well into a newly installed poly water tank, eliminating the need to use the old onsite windmill. A solar powered pump and controller unit needed to be used.
Dowdens contacted local business Nu-Tank to float the idea of establishing an ongoing Rockhampton-based partnership to manufacture and deliver Dowdens dedicated solar pumping solutions in unison with their locally manufactured reliable one piece water tanks to farmers, graziers and local industry alike.
Working in partnership with Stephen Trail [Manager] from Nu-Tank Rockhampton the Dowdens Pumping & Water Treatment Rockhampton branch were able to co-design, test and develop specialised poly lugs that can be welded to the top of each tank. This has allowed Dowdens wide range of solar panels to be fitted safely and securely to the top of Nu-Tank's dedicated solar pumping water tanks.
"Partnering with Dowdens Pumping & Water Treatment [Rockhampton] has allowed both companies to better service the farming and grazier community with specialised solar pump / tank systems. Combining Nu-Tank's quality storage solutions with Dowdens years of solar pumping expertise has seen the development of our unique and reliable solar pump / water tank products. We look forward to working closely with Dowdens in the years to come supplying affordable solar pump and tank solutions to farmers, graziers and local Rockhampton businesses."
The solar pumping system was designed to keep overall costs down whilst still delivering a regular supply of water to the cattle with negligible ongoing service or labour required.
A 3HRSS Waterboy submersible solar pump was installed in the onsite well at a depth of approximately 12m. The solar pump then transfers artesian bore water via metric poly pipe to the nearby specially adapted Nu-Tank poly water tank. The tank then gravity feeds a series of troughs throughout the paddock sufficiently watering the 50 head of cattle.
The Nu-Tank PWT3300 15,000L poly water tank was fitted with a PC500 Waterboy pump controller allowing the pumps flow rate and pressure to be easily managed via the easy-to-use electronic interface. The daily flow into the water tank is now approximately 6,000L - which is more than enough to properly water the 50 head of cattle in the paddock.
The top of Nu-Tank poly water tanks are rated to hold a much greater weight than the installed solar panels - meaning the environmental footprint of the entire solar setup was minimised and the grazier saved money on the total project costs.
Key Project Features:
Harding's Earthmoving submitted a successful tender to Tweed Shire Council for the decommissioning and redevelopment of the Kingscliff North Holiday Park, which included the installation of a new Sewage Pump Station (on behalf of Tweed Coast Holiday Parks).
This standalone Sewage Pump Station was to completely replace the Holiday Park's aging and outdated sewage system.
Harding's Earthmoving subsequently engaged Dowdens Pumping & Water Treatment [Brisbane branch] to design, supply, install and commission a specialised Precast Concrete Sewage Pump Station for use in the Holiday Park's redevelopment. Dowdens Pumping & Water Treatment have partnered with Caprari-CPC to become the sole QLD and Northern NSW distributor and specialised servicing agent for the new patented Caprari-CPC concrete packaged pump stations.
Crucial tender selection criteria stipulated by Tweed Shire Council was for the new complete Sewage Pump Station to be successfully operating for at least 50 years and the concrete chamber to provide a minimum working life of 100 years.
The patented Caprari-CPC Pump Stations are cast using a special S50 cement with a minimum concrete strength of 50MPa and utilises an Angaston Marble calcareous aggregate; offering the highest possible resistance to sulphate attack endemic in Australian sewers. Caprari-CPC Pump Stations are specifically designed to withstand harsh environments, including poor soil conditions and high water tables (engineered to 15m depth). Caprari-CPC Pump Station chambers feature steel reinforcing with an internal concrete cover of 65mm to provide additional protection; this unique feature extends their design life to over 100 years - perfectly suiting Tweed Shire Council's tender selection criteria's.
Once selected by Tweed Shire Council the Caprari-CPC Pump Station was designed, sourced, installed (all onsite earthmoving works undertaken by Harding's Earthmoving), commissioned and the entire project managed by Dowdens Pumping & Water Treatment [Brisbane branch].
"During the lead build time (which was 1 week ahead of schedule) Dowdens were in constant contact. Tweed Shire Council made a few changes along the way which were accommodated and organised promptly and precisely every time by Dowdens. The coordination and regular contact I received was second to none. The team at Dowdens were not just salesmen, they actually knew not only how to trouble shoot, but also how to resolve any last minute changes whilst always chasing me up with courtesy! I was more than impressed with the product, price, amazing service and the installation provided by Dowdens Pumping & Water Treatment. I have been in this game for 25yrs and cannot recall getting more professional service in any other field or from any other business than what I received on this project, a rarity. Thanks Dowdens!"
During initial project investigation the Tweed Shire Council reviewed multiple options for their sewage pump station system, including: prefabricated fibreglass, mould formed precast concrete and concrete pour in situ construction. Some of the Dowdens Caprari-CPC systems key advantages / features that met or exceeded Tweed Shire Council's selection criteria include:
The Caprari-CPC Selection software enabled our design team to assist matching the correct system layout to the specific site specifications. Caprari-CPC selection guide allows registered members to generate an integrated design solution for the selection of an appropriate chamber, pumps and mechanical components for a broad range of applications. The integrated design solution includes: GA Drawings of the chamber along with a "CAD Kit" providing all CAD elements enabling rapid transformation of the GA drawing into a full production drawing; Full component listing, including mechanical specification for your customised fit out; System curve, total system duty, pump recommendations and a budgetary quote is available on request.Key Project Features: CLICK IMAGES TO VIEW FULL PROJECT GALLERY