The common problems of steam flowmeters are 1 indicating long-term inaccuracy; 2 no indication at all; 3 indicating wide-range fluctuations, unable to read; 4 indicating non-return to zero; 5 no indication of small flow; 8 large flow indicating, small flow When the indication is inaccurate; 7 indicates that the change in flow rate can not keep up; 8 K factor of the instrument can not be determined, and the data are inconsistent in many places.
Analysis and solution of the problem 1. Because the determination of the K factor is very important in the entire process of the vortex street, the accuracy of the K factor directly affects the accuracy of the loop, the wear of the instrument replacement parts and the process pipeline, etc. May affect the K factor. The Eastern Chemical Plant also lacks the means and capability of calibration. It can only send calibrations and is affected by the operation of the process. To remove the vortex from the pipeline, it takes 5 to 6 days to send the calibration time, and the process is difficult to satisfy, so that it cannot be determined. K factor. This year, through the transformation of flow meters, although smaller calibrating conditions for vortex street are available, vortex streets with large diameters are still incapable. Afterwards, vortex street calibration methods should be used, using standard frequencies and portable ultrasonic waves. The flow meter measures the instantaneous flow rate in the pipe and the pulse output frequency of the sensor and calculates the K factor on site.
2. The probes of the vortex flowmeter should be regularly cleaned. During the inspection, it was found that the individual probe detection holes were blocked by dirt and even wrapped in plastic sheets, affecting the normal measurement.
3. Regularly check the grounding and shielding to eliminate outside interference. Sometimes the indication is due to interference.
4, install the environment of the wet probe. Should be dried once a day, or for moisture treatment. Because the probe itself is not damp-proofed at the end, the dampness affects the operation.
5, the management of the data data of the instrument should arouse sufficient attention, in order to facilitate the future work.
Analysis and solution of the problem 1. Because the determination of the K factor is very important in the entire process of the vortex street, the accuracy of the K factor directly affects the accuracy of the loop, the wear of the instrument replacement parts and the process pipeline, etc. May affect the K factor. The Eastern Chemical Plant also lacks the means and capability of calibration. It can only send calibrations and is affected by the operation of the process. To remove the vortex from the pipeline, it takes 5 to 6 days to send the calibration time, and the process is difficult to satisfy, so that it cannot be determined. K factor. This year, through the transformation of flow meters, although smaller calibrating conditions for vortex street are available, vortex streets with large diameters are still incapable. Afterwards, vortex street calibration methods should be used, using standard frequencies and portable ultrasonic waves. The flow meter measures the instantaneous flow rate in the pipe and the pulse output frequency of the sensor and calculates the K factor on site.
2. The probes of the vortex flowmeter should be regularly cleaned. During the inspection, it was found that the individual probe detection holes were blocked by dirt and even wrapped in plastic sheets, affecting the normal measurement.
3. Regularly check the grounding and shielding to eliminate outside interference. Sometimes the indication is due to interference.
4, install the environment of the wet probe. Should be dried once a day, or for moisture treatment. Because the probe itself is not damp-proofed at the end, the dampness affects the operation.
5, the management of the data data of the instrument should arouse sufficient attention, in order to facilitate the future work.
Thermal drying is one of the most important and omnipresent unit operations in most industrial sectors. It involves heat transfer and mass transfer. Usually the product obtained from drying is powders or granules. Drying is energy-intensive process.
Drying commonly describes the process of thermally removing volatile substances to yield a solid product. Moisture held in loose chemical combination, present as a liquid solution within the solid or even trapped in the microstructure of the solid,which exerts a vapor pressure less than that of pure liquid.
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