Cryogenic Loading Skids

● Due to the unique properties of cryogenic products, cryogenic loading skids require numerous process lines and a relatively complex process flow. These lines primarily include loading lines, vapor return lines, cold circulation lines, vent lines, and nitrogen lines. Our independently developed batch controller meets IEC ex-proof requirements and integrates an IC card reader and keypad, which can be used for identification. Designed specifically for cryogenic loading, it automates nitrogen purging, pre-cooling, full-volume loading, and shutdown processes. A large screen display reminds operators to adhere to procedures, reducing operational errors and improving safety.

● Batch Control Function: Upon receiving the command to start loading, the skid-mounted batch controller activates according to a pre-set sequence, opening relevant valves and simultaneously collecting flow from flow meter. When the pre-set loading volume is reached, the valves will be closed according to a pre-set sequence.

● Flow Control Function: Flow control valve and mass flow meter are installed within the loading skid, allowing for settings such as safety volume, safety flow rate, and lead time to precisely control the loading flow, minimize water hammer, and improve loading accuracy, meeting both process and safety requirements.

● Temperature and pressure alarm function: Pressure and temperature transmitters are installed on the pipelines within the loading skid to monitor temperature and pressure during loading. If the specified temperature and pressure are exceeded, the control system will alarm.

● Position detection function: The loading skid can be optionally equipped with a parking adaptor which is equipped with an ex-proof proximity switch. After loading is completed, the loading arm must be returned to the parking adaptor to prevent accidental swing and damage to the loading arm or nearby equipment.

● Grounding Monitoring: An electrostatic grounding controller is installed within the loading skid to monitor grounding resistance in real time during loading. If not well grounded, the system will trigger an alarm and shut off the loading control valve.

● Lightning Protection: Lightning protection barriers are installed on the communication, power, and signal lines connecting the loading skid and the outside to prevent damage from accidental lightning strikes.

● Control and Interlocking: The batch controller controls the skid's automatic valves according to process requirements. It collects signals from the skid's pressure transmitters, temperature transmitters, flow meter, grounding controller, and valve position, and displays them centrally on the batch controller, implementing internal interlocking.

● Communications: The loading skid utilizes standard RS485/MODBUS or TCP/IP communication protocols, transmitting real-time information such as loading flow, temperature, pressure, valve position, and electrostatic status to the DCS for monitoring by the plant-wide control system, meeting plant data management requirements.