Selection of the pressure transmitters in the pulp and paper industry
Measuring instrument plays a crucial role in modern industry and science. It helps us to monitor, evaluate and control various physical quantities, thus ensuring the accuracy and reliability of production and experiments. However, as the variety of measurement instruments grows, choosing the right one becomes critical and challenging.
With so many choices, how do we choose to ensure that the instrument we select will meet our specific needs? Next, we'll discuss this in the pulp and paper industry.
In the production process of pulp and paper, chemical pulping, deinking chemical preparation, and storage of coatings are required for level and pressure measurement. Most of these media are corrosive and viscous, so it is appropriate to use flush diaphragm pressure transmitter for level and pressure measurement. The diaphragm material should be corrosion-resistant, such as stainless steel.
The pulp and paper process requires steam to dry the paper, so it is necessary to measure the steam pressure. It is important to note that papermaking uses a large amount of vapor, which can lead to high ambient temperatures. Therefore, the remote diaphragm seal pressure transmitter for measuring pressure or level in a steam condensate system should be located in an area where there is little change in temperature and no shock, to avoid zero drift.
Pulp is an aqueous suspension of paper fibers, which is prone to flocculation and consequent clogging and slaking, in which case flanged diaphragm pressure transducer is more suitable for measuring pulp level and pressure. According to the actual situation determine whether to use a single flange level transmitter or a double flange level transmitter.
It should be noted that in the viscosity of large, easy-to-scale media pressure measurement, it is necessary to increase the diameter of the pressure transmitter guide tube, and the pressure port outside the installation of a valve to facilitate the unblocking and cleaning of the guide tube in the case of non-stop.
After using the diaphragm seal pressure transmitter for some time, if there is a gap between the range and the actual measurement value, it should be descaled and cleaned. For extended diaphragm pressure transmitter, in the measurement of such as pulp class easy to precipitate the level of the medium, we could add a flushing valve on the short tube, regularly d to flush it, to ensure that the pressure port is smooth and accurate measurement.