Regarding the frequent clogging of the pressure tapping ports in double-flange level gauges

Is this a double-flange level gauge? If so, flushing water should be added; there shouldn’t be any blockage under normal flushing conditions.

We have flushing water, but it’s not used usually; it’s only turned on when there’s a problem with the gauge, so it tends to get clogged more easily

Is it not turned on usually to save water for rinsing? In fact, keeping a small amount of running water to flush can solve the problem of blockages. Judging from the title, it seems to be about how to clear things up after a blockage occurs Judging from the process of removing scale from the inner walls of graywater and blackwater pipes, the blockages are quite severe, and high-pressure water guns used by some organizations do not yield very good results either. Let’s see what clever tricks the experts have.

Bro, I’ve been working with sensor diaphragms for pressure measurement without any liquid involved; I’ve been doing this for 18 years now. . . When testing the concrete slurry, the diaphragm doesn’t get clogged with material and isn’t blocked on the outside. . .

Liquid level measurement in gasifiers is a highly specialized task involving many complex factors. The dual-flange with flushing water approach is commonly used at present, but it presents numerous problems. Due to factors such as hydrogen permeation, chloride corrosion, erosion by rinse water, and scaling, the pressure diaphragm of the level transmitter will bubble or rupture after two to three cycles. In fact, double-flange differential pressure transmitters are not necessarily the best choice; in many situations they are less effective than regular differential pressure transmitters. I have conducted experiments in this area, and the key is to take certain measures. I suggest switching to a differential pressure transmitter, along with a minor backflow prevention mechanism (including automatic and manual functions), which can solve these problems. Of course, a measurement plan needs to be designed based on the specific conditions at the site. This allows the transmitter to operate for extended periods of time, while also simplifying and facilitating maintenance.

Add a flushing water ring; the water outlet at the end face of this ring is connected to a flushing water pipe. The outlet end of this flushing water pipe is inclined downward and positioned close to the lower side of the inner wall of the pressure measurement tube, thereby directing the flushing water toward the side near the quenching chamber.

We have a flushing water ring installed here, and the flushing water is kept on continuously

This post was last edited by hfrs on 2018-5-2 at 14:48: the flushing ring, with the connecting pipe tilted upward. The convex diaphragm might be useful.