Add storage tank after resin tower
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This post was last edited by sunjl1981 on 2013-1-6 21:18 The ion membrane caustic soda process designed by our factory has two storage tanks for the primary brine, which is then pumped to the electrolysis process and stored in a storage tank of about 1,000 cubic meters. It then passes through the resin tower for two refinements, and then the secondary brine comes out of the resin tower directly into the brine high-level tank and then into the electrolytic tank for electrolysis. The entire anode process is probably like this. If a secondary brine storage tank is added to the secondary refined resin tower to store the secondary brine, and then driven into a high-level tank, unnecessary shutdowns can be avoided and losses can be reduced when abnormal conditions occur in the resin tower. Is this design reasonable? If it is designed like this, is it reasonable in terms of both process and capital? There are a total of 3 resin towers in our factory. The chance of problems occurring at the same time should be small. There is no need to consider financial considerations. However, some master craftsmen said that the chance of problems occurring with the resin towers at the same time is not small. It’s just that I entered the industry late and have no experience. What do you think? # hcbbs
I don’t know which factory’s process you use. We use chlorine engineering. There is a refined brine storage tank after the chelating resin tower. Under normal circumstances, three chelating resin towers can ensure that the quality of brine is up to standard, but very special circumstances cannot be ruled out, such as problems with the resin tower itself, one time the brine exceeds the standard and is serious, etc. In such special circumstances, it would be better to have a refined brine storage tank.
Adding storage tanks has benefits for production operations. But there is no secondary brine storage tank in all the processes I know of. The first is investment, the second is that adding a storage tank will cause heat loss and increase energy consumption, and the third is that the switching time between the three resin towers is long, and generally there is no need to stop the machine.
From the perspective of protecting the ion membrane, it is necessary to set up a refined brine storage tank after the chelating resin tower. After all, who can guarantee that there will be no problems with the chelating resin tower, and how to ensure the circulation of the electrolytic tank at that time. My company's processes are all there.
In comparison, the chlorine engineering system has many more storage tanks. After the filtered brine comes from the primary brine process, there is a filtered brine storage tank to adjust the pH and the temperature entering the resin tower. Then after it comes out of the resin tower, there is a buffer storage tank that supplies the electric tank for about 2 hours. According to what the poster said, a high-level tank can maintain salt water for about 15 minutes, which seems a bit unreliable. I don’t know how to control the pH and temperature of the primary brine entering the resin tower in your process, and how to ensure the stability of the concentration of the brine. These all have relatively high requirements for the primary brine, because after many times of turbulence and mixing, the concentration of the brine is relatively stable and easy to control. In addition, does the poster's three towers operate as two towers, with one regenerated and standby? If the ions after resin adsorption exceed the standard, according to our design, part of it can be returned to re-adsorb. I don't know if your design quantity can meet the requirements.
This post was last edited by Yinuo Zhang on 2010-3-1 21:36 Ours is that there are two brine storage tanks after the primary brine comes out, and then it is directly pumped to the chelating resin tower for secondary brine refining, and then enters the secondary brine storage tank. One part is pumped into the high-level brine tank, and the other part directly enters the forced circulation electrolyzer.
I think it is necessary, but some friends think that if the Asahi Kasei process is used, after adding the refined brine storage tank, a heat exchanger should be added after the refined brine pump to prevent the brine temperature from being low. I don’t know what everyone thinks.
Our factory also uses the Asahi Kasei process. There was no secondary brine storage tank in the original design, probably because of energy consumption and capital savings. However, our factory already has two storage tanks in the primary brine process, and an additional storage tank is added when pumping to the secondary brine process. This design personally feels a bit wasteful. Is it because of the pump power problem or other reasons? consult
You are right. Generally speaking, the processes of Asahi Kasei and Beihua Machinery are that the secondary brine from the resin tower directly enters the high-level brine tank, while the tank of the chlorine project adds an ultra-fine brine storage tank after the resin tower, and then enters the high-level salt water tank. Our factory has both sets of equipment. Under normal circumstances, when the resin tower and the front system are running stably, we can’t see any advantages or disadvantages. However, under abnormal circumstances, the configuration of the chlorine project seems to be more reasonable.
Post a post and get wealth. The issue of this super-fine brine storage tank has been discussed intensely before. At present, the chlorine project has a super-fine brine storage tank, but there is no high-level tank. ； Asahi Kasei's has a high-level tank, but does not have a super-fine brine storage tank. Different manufacturers have different design ideas, which also leads to differences in processes. I am very pleased that China's chlor-alkali engineers finally no longer blindly worship foreign designs, but have their own thinking, although these thinking are still peripheral and superficial. From the perspective of safe operation, it is better to have a storage tank. Of course, this increases investment, site, leakage and management difficulties. It is recommended that all friends consider the rigor of their own process management and the meticulousness of equipment management, instead of blindly pursuing hardware investment and construction. No matter how advanced equipment and processes are placed in the hands of someone who doesn't care about anything, big problems will occur.
Several factories in our unit have secondary brine storage tanks D-175, which can avoid the impact of gasket leakage or front system abnormalities!