Fire Water Pump Replacement

Please email […] to declare interest A) Introduction LondonEnergy Ltd (The Company) own and operate the EcoPark Energy Centre located in Edmonton, London. The Energy Centre has five boilers burning approximately 500,000 tonnes of domestic refuse per year in a continuous 24-hour operation, 7 days per week. The waste is delivered by road via the weighbridges/gate house by various types of transport. The waste is tipped and held in storage bunkers. Waste is fed by three 5m3 grabbing cranes from the storage bunkers to the feed chutes of each boiler. Each of the water tube boilers is operated to achieve an evaporation rate of 40 tonnes per hour, at a steam pressure of 41.5 Bar and temperature of 415 OC. Material which remains after the incineration process is transferred to the residual conveyors for onward transfer for further treatment and recycling. Within the EcoPark, there is a firewater ring main system consisting of: 1) 2 x Firewater Pumps 2) 1 x Sprinkler Header with level control (float switch start) 3) 1 x Fire Water Ring Main (with pressure-controlled start capability) 4) 40 x Isolation Valves 5) 18 x Fire Hose Points 6) 18 x Fire Hose Connections 7) 20 x Fire Hydrants 8) 1 x Crossover Pipeline (for pressure compensation - to be decommissioned and replaced with the jockey pump) The Eco Park Firewater Pump Project aims to install two new diesel firewater pumps and integrate them with the London Energy DCS system. This will enhance the control, monitoring, and visibility of the fire protection system compared to the currently installed setup. Additionally, a new jockey pump will replace the existing crossover system to maintain pressure in the Firewater Ring Main. In addition to the installation of two new firewater pumps and a jockey pump, this project requires enhanced visual, audible, and control capabilities. All components and alarms must be integrated with the SCADA system, ensuring seamless monitoring and control. B) Project Scope 1) Replace the existing firewater pumps with two new diesel driven firewater pumps. Disconnection of the existing cables from the current firewater pumps and re-termination into the new firewater pump panel. Extending the existing cables via a JB or cable joint. Installation of any additional cables (to be specified and installed by the contractor). 2) Select, procure and install a new jockey pump to maintain Ring Main pressure. Installation of any additional cables (power and control) for the jockey pump. 3) Upgrade repeater panels to communicate all alarms and faults to the SCADA system. 4) Implement DCS-based control and monitoring of the firewater pumps and jockey pump through SCADA. 5) All technical documentation and drawings are to be provided to LEL by the selected contractor for upload to the London Energy SharePoint, by LEL.   C) Control Specifications This section outlines the existing control and installation configurations, as well as the required upgrades. Existing Control and DCS Specifications (Electrical): • Auto Start: Currently initiated via the "Firewater Pump Test Panel" located on the turbine mezzanine level and from the Sprinkler Header Level Switch. • Manual Start: Operated through local control panels at each pump and at various push buttons throughout site. Manual stop is only available via the engine choke on the diesel engine. • Indications Available: o Pump running o Battery circuit healthy o Battery charger healthy o Pump on demand o Fail to start o Low oil pressure o High water temperature o Lamp test o Alarm acknowledgement All above indications are repeated on remote repeater panels located in the Turbine Hall (East end). • Audio and visual alarms: Present on both local and remote panels. • No current control or status indication is available in the CCR via SCADA Fault Indication and Alarms (Current Local Control Panel): o High water temperature o Low oil pressure o Battery charger failure o Battery circuit failure o Fail to start o Pump on demand o …