Is it possible to install infrared thermometers on-site to improve the measurement of the temperature of the gasifier walls?
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This post was last edited by hjy2000 on 2010-6-12 at 17:36. From last year to this year, there have been several incidents across the country involving water-coal slurry gasification plants, where the gasifier walls became red-hot, bulged, cracked, or even broke. There are various causes for such accidents, but the direct cause is likely the inaccurate or delayed readings from the thermocouples on the surface of the gasification furnace; this led to operators ignoring those readings, which in turn resulted in a serious disaster. On the one hand, it is a quality issue related to the thermal coupling on the surface of the gasification furnace; on the other hand, it is probably also related to the skill level of the operation and management personnel in various factories. Here, I was wondering if it would be possible to install surface infrared thermometers on-site to monitor the temperature of the gasification furnace surface in real time? Most infrared thermometers are point-type devices that can only measure the temperature of a single point. However, I have also seen infrared thermometers capable of detecting temperatures over a certain range. If it were possible to install four such thermometers at each furnace on site (and if they could be integrated with cameras and rotated, this would allow for the use of fewer units), then the operation of the vaporization furnaces would be much safer. I wonder what other sailors think of this idea?
It is more important to ensure the reliability of existing temperature measurement devices
If possible, it would be even better to install the far-infrared monitoring and video systems mentioned by the poster as a second line of defense, but it is still essential to ensure the proper functioning of the surface thermocouples for added security.
You’re referring to an infrared imager, right? That device isn’t cheap; it’s used on offshore platforms to detect leaks in pipelines! It’s not a bad thing to add a few more sets if you have the money! !
There is also a problem with this: could inconsistent distances cause the measurement results to deviate too much?
I checked the price of such temperature sensors; one unit costs around 50,000 yuan. For three furnaces, around 8 temperature sensors would be needed, and the total cost isn’t high – it’s equivalent to the price of just one valve. Additionally, we do not require extremely high accuracy from such thermometers; an error of up to 10 degrees is acceptable. On the other hand, this is actually similar to installing cameras on-site; both methods are used to monitor what’s going on there. I don’t understand why this approach isn’t adopted
It’s good advice; I’m not sure about its actual effectiveness. Additionally, the most important thing is to ensure the reliability of the thermocouples on the furnace walls, as well as to ensure that the inspection personnel have a good understanding of the situation on site. For example, use a thermometer on-site to take measurements at any time
Could a layer of high-temperature thermosensitive paint be applied to the outer wall of the furnace, along with a monitor so that any change in temperature can be seen at a glance?
It is recommended to use an online infrared thermometer from Raytek, which can generate heat maps in real time and also provide standard alarm signals for use in control systems
This post was last edited by Tianya Langji on 2021-6-18 at 10:11. It isn’t widely accepted in the industry, and price may not be the main reason. The main reason is the reliability issues associated with contactless fixed installations. For example, assuming that 3 infrared temperature sensors are installed in each layer of the gasification furnace, this setup should theoretically be sufficient for coverage; but what about the concrete beams in the framework? What if, for various reasons, the scaffolding used for maintenance is not removed in a timely manner? And also the obstruction caused by various pipelines and equipment along the irradiation path? This situation is widespread and common in production sites. Aren’t there many vulnerabilities or blind spots? Handheld infrared thermal imagers are quite suitable for use by operators or equipment technicians during inspections.