rotary press trailer system specification - The City of Titusville, Florida

2.08 – Trailerby the PLC and will trigger appropriate alarms when operating outside the threshold limits. The independentchannel pressure transducers are also monitored through the PLC and are used to control the electro-pneumaticregulator which in turn controls the operating pressure control valve to each channel.A. All equipment including the Rotary Fan Press and ancillary equipment listed within this specification shall bemounted in one (1) trailer assembly, allowing space and access for any routine maintenance. The discharge conveyorslisted shall be included as an integral part of the trailer Assembly. The trailer design and constructionshall be of an open compact design, allowing for easy maintenance, cleaning and simplicity.1. 20’ V-Nose enclosed trailer2 5/8” Hitch ReceiverTwo 8,000 lbs. axels with aluminum wheelsIn floor spare tire compartment with full size spare.In floor stainless steel filtration sumpDouble doors in the rear and a man door on passenger’s sideFloor shall be prepared with spray in liner2.09 – Sludge Conditioning SystemA. Each Rotary Fan Press System shall be provided with a sludge conditioning system, designed to make down theproper polymer solution, efficiently mix polymer with the sludge and to adequately flocculate the sludge for optimumdewatering.B. The sludge conditioning system shall be mounted upstream of the press and shall consist of a flow splittingmanifold, a vortex polymer injection ring and in-line, non-clog, pneumatic variable orifice mixer. Polymer additionsystems which utilize tanks with mixers or inject polymer directly into the sludge line are not an acceptableequal to the system specified due to the excess amounts of polymer required by these inefficient systems.C. The sludge conditioning system shall be capable of providing the following performances:‣ The polymer and sludge must be instantly mixed (less than 1.0 second at 150 gpm).‣ Mixing energy must be pneumatically and independently adjustable during operation.‣ If required, provide a fully open passageway for any solids that may become restricted in the mix valveduring operation to be dislodged.2.10 – Sludge Retention Manifold and PipingA. After the polymer and sludge have been mixed in the sludge conditioning system, it will enter the sludge retentionmanifold. This sludge retention manifold will also provide for the sludge feed connection to the Rotary FanPress. The sludge retention manifold shall be rigidly mounted to the ceiling using Schedule 80 PVC piping in agentle winding “C” formation to minimize space requirements and provide the required retention time.B. The retention manifold shall also include one (1) clear see-through section for visual purposes as well as one (1)sampling port for drawing samples of the flocculated sludge during operation.C. Within the sludge retention manifold a pneumatic sludge by-pass valve shall be furnished to divert sludge backto the head of the plant for recycle back into the system. The by-pass also will automatically open should operationalfeed pressures exceed the operator control set-point.2.11 – Polymer Feed/Blend SystemRotary Press Trailer System Specification Page 12 of 16