Temperature and Pressure Abnormality Monitoring Equipment for the Pyrolysis Section of an Oil Sludge Pyrolysis Refinery

Temperature and Pressure Abnormality Monitoring Equipment for the Pyrolysis Section of an Oil Sludge Pyrolysis Refinery

The temperature and pressure abnormality monitoring equipment for the pyrolysis section is primarily designed to collect real-time core data of furnace temperature and pressure, trigger over-limit early warnings and interlock actions, and adapt to the oxygen-free and high-temperature pyrolysis working conditions. All equipment is industrial-grade with high precision, temperature and pressure resistance. The specific classifications and core equipment are as follows:

I. Temperature Monitoring Equipment

High-temperature resistant thermocouples: K-type and S-type thermocouples are the mainstream options, with a temperature resistance range matching the 450~650℃ working condition of pyrolysis furnaces. They are directly inserted into different positions of the furnace (feeding end, middle reaction section, slag discharge end) to accurately collect real-time furnace temperature, provide basic data for the temperature control system, and resist high-temperature corrosion and abrasion by furnace materials.

Infrared temperature sensors: Adopt non-contact monitoring, installed at the furnace observation ports or detection holes to auxiliary monitor local temperature abnormalities inside the furnace, avoid single-point blind spots of contact monitoring by thermocouples, and adapt to the complex high-temperature and high-dust environment in the furnace.

Temperature transmitters: Convert the analog temperature signals collected by thermocouples/sensors into standard electrical signals (4-20mA/RS485) for transmission to the central control system, and have signal amplification and anti-interference functions to ensure accurate and stable transmission of temperature data.

II. Pressure Monitoring Equipment

Pressure transmitters: Adopt diffused silicon/ceramic piezoresistive type with temperature and pressure resistance, installed at key positions such as the top and middle section of the pyrolysis furnace hearth to real-time monitor the furnace's micro negative/micro positive pressure working condition (pyrolysis furnaces usually operate under micro negative pressure), accurately collect pressure data and convert it into standard signals for transmission to the central control system.

Differential pressure transmitters: Auxiliary monitor the pressure difference at the furnace inlet/outlet, flue and other parts, judge problems such as material blockage in the furnace and dust accumulation in the flue, indirectly early warn of abnormal pressure fluctuations inside the furnace, and avoid local overpressure caused by flow channel blockage.

Vacuum pressure gauges/shock-resistant pressure gauges: Display the furnace pressure value on-site as a backup for remote monitoring. The shock-resistant type adapts to the furnace rotation/vibration working condition to ensure clear and accurate on-site reading.

III. Supporting Equipment for Data Integration and Early Warning

Central control PLC/DCS system: Receive transmission signals from all temperature and pressure monitoring equipment, display real-time dynamic curves of furnace temperature and pressure, support preset safety thresholds, and immediately trigger audible and visual alarms when parameters exceed the limits.

Temperature and pressure interlock alarm device: Interlock with the PLC/DCS system; in addition to audible and visual early warnings, it can directly trigger interlock actions of the feeding, heating and pressure relief systems (e.g., cut off feeding, stop heating, open safety valves), realizing an automated closed loop of monitoring - early warning - disposal.

Data recorders: Automatically store historical temperature and pressure data, support abnormal data marking and trend analysis, facilitate accident traceability and process optimization, and meet the data archiving requirements for safe production.