Preventing chelating resin poisoning
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 20:01. In the process of producing soda ash using ion exchange membranes, the brine that comes out of the ion exchange membrane electrolyzers must not contain free chlorine; it needs to be dechlorinated. Is the reason for this simply to prevent the chelating resin from being poisoned? # ， ， &
During the secondary brine purification process, free chlorine and hypochlorite in the brine are removed completely to prevent poisoning and degradation of the chelating resin, as well as to avoid a reduction in the performance of the carbon-sintered tubes. Last edited by limingshuguang on 2009-3-24 09:25.]
It can also cause corrosion to the equipment in the brine production pipelines. For manufacturers that use brine to produce caustic soda, the return of chlorinated brine to the salt wells results in catastrophic losses. Last edited by limingshuguang on 2009-3-24 09:26.]
Prevent corrosion of the equipment pipelines containing primary brine, and prevent the chelating resin in the secondary brine resin tower from being poisoned and losing its exchange capacity.
Free chlorine in brine is detrimental to both brine purification and the equipment. The only one that can remove organic algae.
Due to the corrosiveness of chlorine, higher requirements are placed on pipelines and equipment, which increases costs. It cannot be used with carbon tubes, as it will reduce their performance; moreover, it causes irreversible poisoning of the chelating resin
It causes corrosion of the equipment and alters the properties of the resin.
Prevent corrosion of equipment pipelines caused by saline water. Prevent poisoning of the chelating resin in the secondary brine resin column. Prevent fresh brine containing free chlorine from entering the air and contaminating the environment, thereby affecting human health.
It is primarily free chlorine that possesses oxidizing properties; this oxidizing effect causes the exchange groups in the resin to detach and the resin to break down within a short period of time, thereby reducing the resin’s service life and increasing the likelihood of it breaking apart. It is not simply a case of poisoning.
A lot has been said upstairs; the main reasons for this are to prevent two issues: first, poisoning of the resin in the resin tower, which would result in permanent damage. II. Corrosion of the pipes in the brine equipment. This post was last edited by wang*neng on 2009-3-25 09:08.]
Dechlorination of the brackish water coming out of the electrolyzer is carried out primarily to increase chlorine production and to eliminate the impact of chlorinated brine on primary brine production as well as to prevent corrosion of the equipment and pipelines. If free chlorine is present in the brine, sodium sulfite must be added to remove it, preventing the free chlorine from oxidizing and damaging the resin. This post was last edited by limingshuguang on 2009-3-25 19:41.]
There is a limit to everything; overemphasizing or even excessively increasing reducibility can also lead to a series of side effects. This post was last edited by limingshuguang on 2009-3-25 19:42.]
I believe free chlorine can affect the removal of Mg(OH)2 from brine, and it also corrodes pipeline equipment as well as damaging the resin. In our plant, foam about half a centimeter thick was found on the resin yesterday; I’m not sure if this is related to free chlorine. The foam has a color similar to that produced when hydrochloric acid is poured on soil, and it contains resin particles. I would appreciate your guidance. This post was last edited by yzhms on 2009-3-26 14:11]
It’s mainly like this, and it also prevents the equipment from corroding
There are mainly two reasons: first, to prevent free chlorine from damaging the secondary brine system, which can be fatal, and to protect the carbon filter and resin column. Second is to protect the primary brine system from corrosion.
Preventing resin poisoning: The brine fed into the resin tower must not contain free chlorine, as free chlorine causes irreversible damage to the resin! Saltwater contains free chlorine, which causes severe corrosion to saltwater pipelines; therefore, the water used to protect these pipelines must also be free of free chlorine!
Brackish water must not contain free chlorine. The equipment should be properly protected against corrosion. Strictly follow the operating procedures for the resin tower.
Remove free chlorine to ensure the quality of high-purity acid; thoroughly clean the brine before acid regeneration.
It has two functions: one is to prevent corrosion of the primary salt water pipeline, and the other is to prevent the chelating resin from being poisoned by secondary salt water, thereby losing its ion exchange capacity.
Another point is to prevent corrosion of the saltwater pipeline equipment