The oxygen analyzer burns? I'll save you 3000
Yesterday night, the oxygen analyzer of the third furnace reported another malfunction。
Take a look, the heater chamber can't reach the set temperature, and oxygen levels indicate direct flight to 21%, as if it were not installed. The inspection was opened, the ceramic tubes of the oxidation probe were broken, and the oxidation elements were covered in grey and black carbon。
I've seen this happen 20 times. Each time an original probe is replaced, less than 2,000, and the imported emerson oxymitter 4,000, more than 3,000 light ceramic tubes。
Every time the chief signed the purchase order, he said, "why is it broken?"
I said it wasn't pompous. It was the place and the pre-treatment。
Why is the oxygen analyzer short
Three: cold thermal shocks, dust plugs, electrodes poisoning。
Cold thermal shocks are the deadliest. Many people were shut down, and the probes were at several hundred degrees of heat, and suddenly the power outage stopped heating, and the internal and external temperatures of the ceramics were so different that the contraction broke. The correct approach is to maintain the power supply for at least half an hour after the shutdown, allowing the probe to naturally cool down to less than 300°c and then cut the power。
Dust plugs second. A high concentration of dust is found in the steel plant's flue gas, and if dust piles are accumulated on the surface of the probe without ceramic filtration cores, oxygen will not be diffused at all. I've seen a site where filters haven't been cleaned up for six months, open a thick layer of ash, and oxygen levels have been indicated at 0. 5 per cent, and operators think it's low oxygen, winding up the stove, and then it's drying up。
The electrode poisoning is a hidden problem. So2 and h2s concentrations in the flue gas can corrosive the oxidized electrode. This situation is useless by replacing the probe with a pre-treatment system — a sinter metal filter, an anti-blowing device and regular cleaning。
Share a live case
Last summer, we had a cross-river zr22s, installed in the third boiler for the export of coal, which remained stable for a year and a half。
There's a new replacement - the boys are working very hard, and in the third month, oxygen levels are starting to change, and at a very low and high time. No, no, no. I asked him to open the pneumatic pre-treatment pipe and found the sampling tube filled with condensed water。
Turns out he saved himself from the condensers。
The oxen oxide analyser measured dry-based oxygen, water vapour in the flue gas, which went into the probe and became condensed water, while light data drifted and heavy ceramics were added to the heated cores to burst - thermal ceramics touched cold water and fractured。
Retrieving condensers, draining pipes and automatic water drainage valves, problem solved. New recruits spend $3,000 on tuition。
Picking out a hole
Nationally produced oxidized oxidation is cheap, with three or four thousand sets, but the life expectancy of the heating silk is generally short, averaging about one year. The imported emerson oxymitter 4000, the trans river zr 22g, a set of 78,000 to 10,000, is fine for three to five years under normal conditions。
Keys:
In addition, some manufacturers now have models with automatic calibration to save them from manual calibration. Is it worth it? If you stand up to the gas cylinders quickly, it will save you enough gas money for a year。
As a teacher who's been doing the instrument for more than a decade, my suggestion is that the life of the oxidizer is not on its own, that it installs the environment and pre-treatment systems。
When pre-treatment is done, the national probe will take two years. Pre-treatment is a bad idea, and the import probe is disabled for six months。
Let's order it, let's show it to more people。
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