Continuous freezing process equipment selection issues
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I would like to ask, in continuous production, to freeze liquid from about 0 degrees to about -10 degrees, what kind of heat exchanger is more suitable, what kind of cold carrier is more suitable, and how does the refrigeration system work? Explain it here: The liquid that needs to be frozen is mushy and not very fluid. You may need to pay attention when choosing a heat exchanger. The liquid processing capacity is also relatively large, about 3 tons per day, so the freezing capacity is required to be large enough. I am a layman, so my wording may not be accurate, just understand it. Welcome to communicate and discuss{:3_46:}
There are many methods for purchasing liquid nitrogen vaporization, using coil type and other stirring methods.
this. . . How to implement it specifically and how to match it. My eyes are dark, what courses and teaching materials should I learn for beginners? Please recommend me. Make up lessons privately
This post was last edited by CHANGBAISHI on 2019-1-28 18:05 Nowadays, the filling stations of general gas supply stations use large-capacity Duwaping. If conditions permit long-term use, you can install a cryogenic liquid storage tank of tens of cubic meters, or you can install a carbon dioxide cryogenic storage tank. This depends on the nearby resources, which one is convenient and cheap. Both of these are low temperature media. If the temperature of this gas is too low and the temperature difference you require is too large, it is better to use this medium to cool the circulating oil, and then use the oil to cool the material you want to cool. It can prevent the physical and chemical indicators of materials from being damaged due to excessive temperature difference. The process is to introduce low-temperature gas or liquid (the introduction pipe must be insulated to prevent it from running cold) into the oil cooler (the same view as the coil heat exchanger), and then set up a press-view device, connected with circulation. Set the return oil above the low-temperature liquid cooling tank (box), and the cooled oil at the bottom goes to the cooling material tank. The oil circuit is connected in series with a small gear pump. Give it a try. If you want to save trouble and low and ultra-low temperatures cannot change its physical and chemical indicators, you can make a spray gun with an insulation layer, which uses low-temperature gas through a conduit (with a low-temperature metal conduit) connected to a straight pipe with an insulation sleeve. The valve at the outlet of the tank can control the flow of gas (or low-temperature gas). It is recommended to first purchase a small amount of liquid nitrogen or carbon dioxide (with bottle turnover) at the local gas supply station (unit that fills oxygen bottles) for experiments, and then set up a low-temperature storage tank. Perform equipment characterization. It is best to use copper coils with a diameter of about 10mm. You can connect 3 to 4 sets of coils in parallel. The same kind of coils should be used for the main pipe (this section of coil may need to carry low-temperature liquid, and the multiple after gasification is 800 times the volume ratio). It can be softened by burning it. This is enough for the main experiment. There is another best way, which is to set up several joints at the bottom of the tank. It will be easier and more feasible to have the bottom blowing upward to stir. Another thing that needs attention is to install a small safety valve on the conduit. The working pressure is 0.1mpa. This will prevent the liquid outlet pipe from freezing and blocking, which will cause gasification overpressure, which is no fun. Remember! ! !
In order to make the material uniform, the feed port is set at the bottom of the tank, the upper part of the tube is taken out, and a temperature measurement point is set.