WHAT IS A TTU?IT IS A FULLY FUNCTIONING WATER TREATMENT WORKS THAT CAN BE TRANSPORTED TO SITE ON THE BACK OF A LOW LOADER.
WHAT IS A TTU?A TTU contains a Water Treatment Works which is primarily used for removing Colour, Turbidity and Cryptosporidium from the water, making it safe to drink. A TTU can produce anything from 2m³ to 220m³ of drinkable water each day. For greater requirements we can supply a ‘modular build plant’ which is capable of producing up to1320m³ of water per day. While this plant is not a TTU it is a purpose made building utilising the same technology and containing skids that carry all of the working components.A TTU is the complete package for a Nano Filtration plant and offers huge environmental advantages and cost savings over a conventional ‘on site’ building. A complete transportable WTW offering a turn key solution that has been designed and developed through ongoing innovations at Ross-Shire Engineering.
PROCESSPROCESS AND INSTRUMENTATION DIAGRAM – 100m³ Per Day plant
PROCESS A variety of options available for a TTU Design.there are currently 18 options available depending on the requirements of the site. These options include, Feed Pumps, Duty/Stand By Strainers, Permeate Tanks, Re-Lift Pumps, etc...
DESIGN AND FABRICATION The TTU’s are designed and fabricated ‘in house’ and leave our fabrication facility as a fully commissioned plant.The TTU Building, Pipework, Cabling, Civil and Software Design are all carried out and completed at our Head office in Muir of Ord.
DESIGN AND FABRICATIONThe TTU Building is designed to withstand the highest wind speeds ever recorded in the British Isles.attention to this design detail ensures suitability for placement from the Shetland Islands to lands End. Each building is enclosed in a thermal cladding which helps maintain the inside temperature at a steady constant. The TTU also has high security doors and a motorised roller door on the Gable End. The building is designed to allow a crane to lift it from the lorry bed onto the concrete slab that the TTU ultimately sits on, whilst fully laden with all the equipment.
DESIGN AND FABRICATIONAll of the pipework within the TTU is Stainless Steel and fully welded which negates any risk of leakage through the joints. It is fully designed within our 3D Design package, Autodesk Inventor, which allows for full ‘walk through’ design including instrumentation and cabling. The pipework is routed to allow for clear walkways throughout the building allowing ease of maintenance if required. All pipework is fixed 500mm from the floor to allow for cable tray and cables to be run underneath, without any conflicts. All pipework is compiled and put onto drawings for review by the design team and the pipefitters / welders. This ensures that the pipework is designed correctly practically and efficiently.
DESIGN AND FABRICATIONThe plants are designed with an intelligent MCC that utilises a Siemens PLC with a Profibus network to communicate with all the pumps, valves and instruments, including pressure, flow and quality instruments. Using a ProfiBUS network for control and automation reduces the amount of cabling required by 25% and allows the MCC, cable containment and building to be smaller than with a conventional control system. The use of a Intelligent MCC allows the option of remote control and monitoring, should it be required.
DESIGN AND FABRICATION All pipework spools are initially put into the 3d Model and arranged to suit each specific site. they arethen put onto separate drawings and sized to allow the pipe fitters and welders to fabricate the spools. Once produced the spools are pre fitted, cleaned and flushed before final installation within the TTU.
DESIGN AND FABRICATION Once the TTU design, fabrication, pre-Installation is complete the final Install can begin. This work iscarried out by a fully trained team of multi skilled time served men and women working closely together efficiently and constructively. Before the final fitment, pipe, pipe supports, brackets and cable tray is all installed to ensure fit and quality. Once the pre fit is complete the job is checked against the design criteria for each site, once checked it is sent for finishing. Upon completion of the painting and galvanizing of the fabricated components they are placed into the building for final fitment. the cabling is then completed ready for testing.
COMMISIONING THE COMMISSIONING IS CARRIED OUT IN THREE STAGES, FIRST AN INSTALLATIONINSPECTION IS CARRIED OUT TO ENSURE THE PLANT HAS BEEN CONSTRUCTED AS THE DESIGN.Next comes the dry testing, the plant is powered up and the required settings for pumps, valvesand drives are entered. The profibus network is also commissioned at this stage. Once the dry test is complete the wet testing can begin. This is carried out in our workshop and the plant is tested with full flows through it.
CIVILS Infrastructure in any contract within the waterindustry is essential, it provides the services and structures for the M & E install process. The bespoke reinforced concrete base provides arobust platform which encapsulates the services penetrations to allow mechanical and electrical install to take place directly after the TTU has been placed.
TRANSPORTATIONUpon completion of the construction and testing, the TTU embarks on the final stage of its journey, tosite. It is placed onto ‘skates’ and rolled out of the workshop, it is then lifted onto the back of a 40ft Lo- loader by crane. Once the TTU has been fully secured it leaves for site. This part of its journey has involved a great deal of in-depth logistical planning. Due to the variety of site locations within Scotland tending to be served by B Class roads the logistics route planning and surveying can in itself be extremely challenging.
TRANSPORTATIONMany sites are on islands or only accessible via ferry, this has to all be planned and programmed intothe journey of the TTU. The Units are designed to conform to the maximum width and height allowed on UK roads, without a Police escort.On arrival at site the crane then lifts the TTU onto a concrete slab that has been constructed to mirror the detail of the 3d Model. Once placed onto the slab it is anchored by Eight M30 holding down bolts pre-cast into the slab.
COMPLETED TTUAfter all of the tie-ins have been completed and the remainder of the site work complete the TTU is then ready to be Fully commissioned and be put into its Test Stage.
CURRENT RSE SITESRoss-Shire Engineering are currently carrying out workon various sites throughout Scotland. These sites vary in location, size and build type. TTU BUILDS Sheildaig WTW - 150m³ per day Kinlochewe WTW – 150m³ per day Loch katrine WTW – 35m³ per day Stronachlachar WTW – 35m³ per day Kilchoan WTW – 160m³ per day Raasay - 200m³ per day PURPOSE MADE BUILDS Lochcarron WTW – 520m³ per day Unst WTW – 520m³ per day Broadford WTW - 520m³ per day
RSE INNOVATIVE DEVELOPMENTS After winning the ‘SCDI Highlands and Islands Business Excellence Award for Excellence in Research and Innovation’. Ross-Shire Engineering has not rested on its laurels, and are currentlylooking into further developing the design of the TTU to incorporate clear water tanks and chemical waste tanks. This will remove a vast amount of the civil scope of works and will greatly benefit the environment, as well as being even more cost effective. incorporating these two tanks into thebuilding will ensure there is far less disruption to the area within the immediate vicinity of the WTW. These designs are still in their early stages, but are looking extremely positive and will have a massive impact on the amount of site work required at WTW sites in the future.