Wax formation problem in methanol air cooler
Thread Content
Have any of you used methanol synthetic air coolers? Have you ever had any issues with wax buildup? How to deal with it?
When wax formation is found, if it is not serious, you can blow it with steam. If it is not enough, stop the car and deal with it. It shouldn't be a big problem.
I used to be the main compositing operator, and I usually had to deal with it every once in a while. as follows: When it is found that the heat transfer cooling effect is not good, the cooling water temperature can be increased appropriately, but be careful not to make it too high (the dew point of methanol is the limit. If it is high, the gaseous alcohol cannot become liquid, which wastes the power of the cycle machine). It doesn't take very long, about ten minutes or so.
The melting point of paraffin is 57-63°C, and the boiling point of methanol is 64.5°C. There is not much difference between the two. Can they be controlled well?
Found wax can be treated with hot water or steam.
Use steam to cook, it comes faster~!
Please explain in detail how to cook with steam
The outlet temperature of the air cooler should be around 70 degrees, and the wax formation is not too serious. If there is wax formation and the pressure difference between the front and rear increases, you can slightly increase the gas temperature of the air cooler, melt the wax, and bring it to the rear water cooler. Then increase the water cooling temperature and bring the wax into the alcohol fraction, from the alcohol fraction to the crude alcohol filter. If the pressure difference before and after the crude alcohol filter increases, you can change it to another one. The one with the large pressure difference is isolated from the system, and steam is introduced. After hot washing, the wax can be drained out.
We have learned* After discussion, if the wax formation is not serious, it usually occurs after parking. Close the water cooler circulating water inlet and outlet valves, change the blind plate on the steam removal wax to open, remove the short pipe at the bottom of the separator and connect it to the trench, and then pass in steam to remove wax.
The main reason for wax formation is； 1] Ordinary driving and parking 2] The operating temperature is too low, etc. ； 1】Online wax removal ； Cut off the fresh air, turn on the self-circulation, close the cooling water valve of the water cooler, introduce steam or condensate into the water cooler for blowing, and open the bottom discharge valve of the alcohol fraction. 2] Parking to remove wax ； During the parking process, directly pass steam or condensate into the water cooler for blowing, and then use the alcohol separation bottom drain valve.
Wax formation is a problem with the quality of the coal you use. Generally, steam blowing is used when wax formation occurs. . . . dissolve it
The air cooling used in our factory has no wax accumulation problem. Is your temperature control a bit low?
Keep the tower temperature under control. It should be over 190 degrees. You can just blow it with steam. If it doesn't work, stop and deal with it.
Prevention means controlling the temperature to prevent the formation of carbonyl iron, etc., which is a catalyst that promotes the formation of paraffin. deal with: 1. Online is to close the air-cooling medium valve, and rely on the temperature of the reacted gas itself to melt the paraffin and bring it out of the heat exchanger. 2. Boil with steam, melt it and then blow it out with a lot of gas. 3. If possible, you can also wash it with high temperature and hot water.