The catalyst cannot be recovered by the third-stage cyclone separator

1. It could be a blockage in the three-spin single tube; I’m not sure what type of three-spin system you are using – what is the dust level at the inlet of the exhaust fan? 2. Poor dust removal in the four-spinning material legs (faulty or clogged flap valves) causes the catalyst separated by the three-spinners to be carried up again; this can be determined by checking the temperatures of the four-spinners and the catalyst collection tank ； 3. If the three rotors fail, the damage to the smoke extractor can be severe

The triode tube is clogged or there’s a problem with the 3-pin connection

The three-spinner cannot recover catalyst fines, and there are generally three reasons for this: (1) The material inlet of the three-spinner is blocked, or the inlet of the four-spinner is blocked, as a result of which all the flue gas and dust that pass through the three-spinner end up mixing back into the flue gas unchanged. (2) The three-spin mechanism is under-sized; the linear velocity of the flue gas at the inlet of the single tube in this mechanism is too high, resulting in back-mixing of flue gas dust and an inability to separate the gas from the solids, thus failing to achieve the desired separation effect. (2) The three-spin speed is too high, and the linear velocity of the flue gas at the inlet of the single tube for three-spin operation is too low; as a result, the flue gas and dust cannot achieve the necessary separation speed within that single tube. A special reminder: the quad-rotor is optional, but the triple-rotor is definitely necessary ； In addition to the problem of flue gas containing unremoved dust severely damaging the smoke exhaust equipment, another issue is environmental pollution, with employee health being particularly affected as a result.

Reply to 1# jgh20425: May I ask whether the three-spin device used by this colleague is a traditional domestic technology device? Abroad, multi-factor stacked cyclone separators are used for the separation of large volumes of gas-solid mixtures; the separation efficiency of a single unit reaches 99.5% at 10 microns (equivalent to multiple cyclones used in China), with a processing capacity of 100,000 standard cubic meters per hour. One such unit can replace several units with multiple stages of separation, offering excellent cost-performance. This technology has been used for gas-solid separation in the West-to-East Gas Pipeline Project II. I welcome your letter for in-depth discussion.

Check the critical nozzle to see if it is damaged. It has a significant impact on the triple spin

Original poster, since the problem arose after the maintenance, it’s likely that the maintenance wasn’t thorough enough. There are many areas that must be inspected during catalytic maintenance; by \"must,\" I mean areas that definitely need to be checked and dealt with, and three-selection and four-rotation are two of such areas. During maintenance, it is essential to check the inlets of the three rotors, as well as the inlets of each small rotor; in particular, the outlets, that is, the passages through which the material flows. This can be checked by using a flashlight. Additionally, the four rotors also need to be inspected. Don’t rely on luck; make sure to check everything that needs to be checked. Could the original poster explain the maintenance status of the three-speed drive in your home? To figure out what the problem is, check the pressure drop across the three spinners. You can compare this with your previous data to see how much it has changed (don’t tell me you don’t have data from when everything was working properly). Ha, I think that should help solve the issue. If it really doesn’t arrive, then attention must be paid to the operation of the regenerator; it is essential to analyze the dust content at the outlet of the three spinners in order to have a clear idea of the situation. My family’s 40-60. The range hood has worked fine for several years.