Are there 2 or more monitoring points for each of the temperature and pressure in the reactor?
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The company plans to install a 25m³ hydrolysis reactor; temperature and pressure are critical parameters in this process! For safety reasons, and to prevent sudden damage or failure of the platinum resistors or pressure transmitters, 2 sampling and monitoring points are prepared for each. 1. Has anyone seen a reaction vessel with 2 or more sampling points? 2. Is there any standard or theoretical basis for such a design? 3. Is there a standard for the insertion depth of platinum resistors? (For example: how deep below the liquid surface it should be inserted.) Additional details: Maximum temperature: 180°C; maximum pressure: 1.0 mPa; volume of the tank: 25 m³; loading capacity factor: 70%; specific gravity of the material: 1.4. Anyone with expertise, please give some advice!
I haven’t seen two of them, but it’s feasible. It’s better if the depth is such that the stirrer blades are not touched.
Just install a temperature sensor with two probes; the depth should be such that it does not touch the stirrer blades
Of course. I’ve seen reactors with multiple temperature monitoring points. If interlocks are to be used, it’s recommended not to use just 2 points; using 3 points to form a two-out-of-three configuration is better
1. This needs to be determined based on the process requirements. 2. The standards only establish some principles; it’s impossible to cover everything. 3. The insertion depth should reach the lowest interface
1. Has anyone seen a reaction vessel with 2 or more sampling points? Answer: The polymerization reactors I have seen and used have two sampling points. Is there any standard or theoretical basis for such a design? Answer: This design is based on manufacturing processes and safety considerations. 3. Is there a specification for the insertion depth of the platinum resistor? (For example: how deep below the liquid surface it should be inserted?) Answer: In accordance with the \"Code for Construction and Acceptance of Automatic Instrumentation Projects\" GB50093-2002, the insertion depth of the platinum resistor should be at 1/2 of the length of the process pipeline
Adding to what was said above, the insertion depth of the thermal resistor in the equipment is generally 400 mm, while on pipes it is usually 1/3 to 1/2 of that depth.