How does this device measure temperature?
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The temperature is around 100 degrees during feeding; it needs to be reduced to 60 degrees using cooling water before the material can be fed into the next processing stage. Due to the presence of a jacket, stirring inside the tank, and the high viscosity of the medium, insert-type thermometers cannot be used. Infrared thermometers have not been tried yet; I’m wondering if anyone who has experience with infrared temperature measurement knows whether this equipment can be used for that purpose
From your diagram, it seems that this reactor wasn’t designed with temperature measurement of the medium in mind. In the situation you described, infrared temperature measurement is not suitable for uneven materials; it’s better to use temperature sensors to directly measure the temperature distribution, arrange several temperature measurement points appropriately, and then calculate the temperature of the medium inside the reactor comprehensively. The temperature sensor can be inserted by making horizontal holes in the wall of the reactor; a multi-point temperature data acquisition unit can then be used to display and calculate the temperature.
Agreed; it’s better to use desalinated water for the circulating water, as this way there will be no scale formation and the cooling effect will remain unchanged
Sir, is it easy to make holes in equipment with jackets? Are there several holes with internal threads on the jacket, along with one flange hole?
This post was last edited by qugd on 2018-1-23 at 20:57. Should I go check the equipment’s drawings? How am I supposed to know what those openings are for? Since you’re standing by the device, why don’t you go and take a look yourself, and use tools to open the hole and check it out.
Notches are made at the same height on the scraper outside the mixer, then holes are drilled in the tank wall to install sleeves, and a thermistor is used for measurement; this is a solution used by small factories. Otherwise, use other parameters as the controlled parameters; if there are changes in the properties of the material that lead to an increase in its viscosity or in the resistance encountered by the mixer, use the mixer load instead of temperature Furthermore, open-loop control is used; through trial and error, at a certain ambient temperature, one tries to keep the flow rate and temperature of the cooling water constant, and then observes how long it takes for the material to reach the desired temperature (as measured in the discharge pipeline). I personally think this approach isn’t reliable, haha.
I think it’s fine to model and predict the temperature based on the temperature difference between the inlet and outlet water.
Thermal resistor, installed at the top of the reactor and inserted into the bottom of the equipment, making sure to avoid the blades of the stirrer.
1. What is the gap, in centimeters, between those rods on the mixer and the tank wall? 2. For values over 1.5 centimeters, an immersion thermometer can be used, by attaching the temperature sensing probe and cable tightly to the tank wall. If you ever run into trouble finding someone who can supply this product, you can come to me – I’m an expert in manufacturing waterproof instrumentation. 3. Question: What does \"jacket\" mean? . . . Does it refer to electric heating, or steam heating?
This infrared detection method is directly ruled out; it requires sensing at fixed positions. Since there are materials being stirred, and the surface is uneven, this approach won’t work. Is it possible to attach a thermistor to the stirring shaft, with a sleeve around it? Finding a way to address the rotation issue at that point would solve the problem.