Sensor Structure Diagram

Solution

Because high temperature sulfuric acid is strongly corrosive, and traditional insulation materials cannot withstand this high temperature environment, the two coils are not in direct contact with sulfuric acid. In order to form a conductive circuit, the electrode flanges at both ends of the sensor need to be connected.

When using the sensor, ensure that the sensor flange is insulated from the mounting flanges at both ends. When installing sensors in the field, commonly used insulation bolts include PTFE or paper-plastic insulation materials. However, at high temperatures, the PTFE material may soften, resulting in a weakening of the original preload force, which may cause the flange to leak sulfuric acid, thus affecting the normal operation and safety of the sensor. On the other hand, when using paper-plastic materials as insulators, due to the influence of factors such as bolt torque, moisture and acid fog, the paper insulation pad may be damaged, which also leads to flange leakage of sulfuric acid, which affects the performance and safety of the sensor.

The main reason for the release of sulfuric acid at the flange position of the sensor is that the insulation components of the original configuration are susceptible to high temperature deformation, sulfuric acid corrosion and rain softening and bolt torsion deformation. Only by solving the problem of these insulation components can the sensor sulfuric acid leakage be effectively prevented. To this end, according to the sensing performance requirements and the characteristics of sulfuric acid, we independently developed an insulation component designed for the sensor, aiming to completely solve the problem of sulfuric acid leakage in the sensor flange. The LJ80 non-high temperature insulation assembly is suitable for the temperature range of -40 to 260 ° C, and it uses engineering plastics with excellent insulation properties and corrosion and torque resistance as insulation pads. The fastening bolts are made of 304 stainless steel, and the surface is coated with Teron material to ensure that they do not soften at high temperatures, and the fastening force remains stable, so as to ensure that the flange joint does not leak acid waves. The component can resist the corrosion of dilute sulfuric acid, and reduce the impact of rain on the conductivity of the sensor, to ensure that the sulfuric acid concentration analyzer in the long-term use of the process will not be due to sulfuric acid drainage hole analysis failure, thus ensuring the safe and stable operation of the device.

Product Feature

Torque resistance: 50Nm ensures stable connection even in high-intensity vibration environments.

Anti-deformation: Variable less than 0.05mm (The flange fastening system maintains a constant preload force)

Insulation property: The insulation resistance is still greater than 10MΩ under 95% humidity conditions

Stability: The insulation performance shows no significant decline after continuous operation at 220℃ for 5 years

Product Advantage

The sensor has been securely fastened for three years without leakage

The insulation failure value is over 10 years

The insulation value of the electrode is greater than 10MΩ

Corrosion resistance: It shows no corrosion in strong acid/dilute acid and high-temperature environments.

Selection Parameter