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电极式液位检测是一种简单易行的液位检测装置。但在化工设备中如饱和塔、碳化塔等由于检测环境与一般不大相同,故对该环境中的电极式液位检测有一些新的要求。检测环境的特点: 1.设备内有可燃性气体,如发生打火现象,有引起爆炸的可能,故要求电极工作电流尽量小,以绝对保证安全。此外,工作电流过大,由于极化作用易造成对设备的腐蚀破坏,而且电极蚀坏经常更换不仅是件麻烦事,还要等待停车时才能处理。所以电极通过最小的工作电流,电路具有较高的灵敏度是首先要具备的条件。 2.电极安装一段时间后,由于电极头集聚脏物及碳铵结晶会造成接触电阻增大,如果在饱和塔内安装,由于塔内水雾影响或电
Electrode level detection is a simple and easy level detection device. However, in the chemical equipment such as saturated tower, carbonation tower, etc. as the detection of the environment is not the same as the general, so the environment of the electrode level detection has some new requirements. Detection of the characteristics of the environment: 1. Flammable gases within the device, such as the occurrence of ignition phenomenon, the possibility of causing an explosion, it requires the electrode current as small as possible to ensure absolute safety. In addition, the working current is too large, due to polarization can easily lead to damage to the equipment, and electrode erosion often change is not only a troublesome, but also wait for parking to be processed. Therefore, the electrode through the minimum operating current, the circuit has a higher sensitivity is the first to have the conditions. 2. After the electrode is installed for a period of time, the contact resistance increases due to the accumulation of dirt on the electrode tip and the ammonium bicarbonate. If it is installed in a saturated tower,