Catalytic regenerator running agent

I guess it's a spin issue. How did you check it? Are the components inside the spindle broken? . . It is recommended to check the spin score! !

It is possible that the material level of the second-density bed fluctuates greatly, causing the material level to be too low, causing the material leg outlet to lose the material seal.

The second rotary leg does not discharge material smoothly. When the material leg does not discharge material smoothly, there is accumulation of catalyst inside the ash hopper of the cyclone, and the pressure drop of the cyclone decreases rapidly, causing the catalyst to run away. After the material is discharged normally, the pressure drop increases and the cyclone works normally again. Check whether the inverted cone or wing valve of the material leg outlet may be in the dead zone or fluctuation zone. This kind of device has a two-density fluidized bed like a coke tank regenerator and a dilute phase tube. This situation may also occur if the main air distribution on both sides of the two coaxial single-stage regenerators is uneven.

How is the regenerator bed temperature? Does it fluctuate greatly? It may be caused by air return.

The effective method is to lift the regenerator's storage capacity first. Low probability is the most likely cause of agent leakage.

It may be that the material level is relatively low, causing catalyst loss! The slide valve opening can be changed to increase the material level!

Many running agent factories have this problem, but we still have to look at the process to find the problem!

I also agree with the second floor. I wonder if you have checked the material legs and ash hopper to see if there is any carbon deposits? Is there any damage to the lining? At the same time, does the differential pressure fluctuate when the agent is running? Have you checked whether there are any holes in the internal and external heat pipes?

1. The storage volume is too low 2. The material leg is blocked 3. The wing valve is damaged or the valve seal is not tight

There may be a problem with the wing valve of the secondary cyclone separator. Replace it with a new one. It may also be that the material leg is short and the bed capacity is low, the wing valve is not closed tightly, and the agent is running away. The method is to increase the regenerator bed capacity to seal the material leg.

If similar phenomena occur frequently, I don't think it is an operation problem. The key to the problem lies in the second-rotation equipment, and it is not that the wing valve is not closed tightly. The main problem is the angle design of the wing valve, which causes the catalyst to run away. The treatment is very simple. Find an experienced expert. After the work is stopped, go in and feel the load-bearing condition and angle of the wing valve with your hands, and then cut it off and find the correct angle again.

The reservoir bed is too bottom~~! Increase the reservoir. The wing valve is not flexible. Don’t let the pressure fluctuate. The double-action slide valve changes, and the waiting agent suddenly becomes oily.

Thank you for your enthusiastic suggestions. The problem of low storage capacity can be eliminated. The wing valve was replaced due to this problem during the earliest maintenance. Our device is a single-stage counter-current complete regeneration, and there is no double density problem. There is no problem with the double acting spool valve either. Every time this problem occurs it is when the regeneration pressure is very smooth. I have personally inspected the inside of the rotor through the flue gas collecting pipe, and there is no problem. I can't confirm what the fourth floor said right now. Because only one of the secondary material legs of our instrument has density, the other two cannot be tested. Anyway, thank you all.

The situation you mentioned has been experienced in two-unit coaxial single-stage regeneration devices such as Changling, Luoyang, Hohhot, etc. My personal opinion is to improve the secondary material leg wing valve and increase dense phase density measurement points. In particular, the density near the wing valve must be controlled not to be too high.

possible: 1. The wing valve of the material leg is damaged or the valve is sealed, or even the design has an improper bevel angle. ； 2. Secondary combustion occurs in the dilute phase, causing the catalyst to rise.

If the regenerator runs out of agent: 1. Make the following calculations on the working conditions and look at the linear speed at the cyclone inlet. If the linear speed is too high or too low, it will cause abnormal running loss of the catalyst. 2. Check the pressure drop of the main air distribution pipe or distribution plate to see if the pressure drop of the main air distribution pipe changes. If the pressure drop is abnormal, the main air distribution is not good, which will cause running loss. 3. Is the regenerator frequently over-temperature? If so, the material leg may be broken. However, in this case, the catalyst loss is particularly severe and the storage capacity is difficult to maintain. The catalyst must be continuously replenished. 4. Have you ever been in bed before? If so, it is possible that the wing valve is jammed, but the dosage will be larger. 5. Generally, the regenerator material legs are less likely to be clogged unless the internal lining falls off. 6. Through sampling analysis, whether there is leakage in the primary or secondary cyclone lift cylinder, the total cyclone pressure drop will be reduced, and the agent leakage will be serious. 7. Check whether there is water vapor entering the regenerator. 8. Check the particle size distribution of the balancer. If there is a problem with the three-turn system 1. Check the pressure drop of the three-turn system and determine whether there is a blockage in the three-turn single pipe. 2. Check the pressure and temperature conditions in front of the critical nozzle, and calculate the air leakage of the critical nozzle to see if there are any abnormalities.