3 problems with underground salt ponds
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This post was last edited by sunjl1981 on 2013-1-6 at 21:38 :shutup: 【320,000-ton plant】Underground salt dissolving tank; raw material: fully vacuum-refined salt. 1. How to address the issue of small particles in the vacuum-refined salt, excessive floating salt at the outlet of the salt dissolving tank, and difficulty in controlling the concentration. When salt is loaded onto a loader, is a salt tank added? Is the lower part of the salt container submerged in saltwater? 2. Is the heating of the brine water coming from the water distribution tank always done using plate heat exchangers? What is the effect of applying steam directly to the salt dissolving tank or the pipes carrying the saltwater? 3. What is the material chosen for the saltwater distributor in the underground tank? How long is its lifespan? I see that some of the pipes are of the CS/PO type; how is corrosion protection applied to their surfaces? ， ， -
Reply 1# jqs I will only answer 2 or 3 questions, because my company uses coarse salt. 2. Using a water distribution tank with a plate heat exchanger for heating is a good approach; directly heating the salt dissolution tank is wasteful. 3. The saltwater distributor is made of fiberglass; our company uses such distributors, and those manufactured in-house also perform well. However, our company uses coarse salt, so there is no issue with floating salt. There was a problem of clogging in the water distributor, but this issue was completely resolved after some improvements. Feel free to contact us if you need further information.
The water delivered from the water distribution tank is heated effectively by the plate heat exchanger before entering the desalination tank, allowing for good temperature control. In northern regions, to maintain the temperature of the salt dissolving tank, a steam pipe can be installed in it. It leads directly to the salt dissolving pond. The saltwater distributor in the underground tank can be made of titanium, so there is no need to worry about corrosion. Steel-lined PO is also okay. But over time, it will definitely corrode.
Regarding the issue of floating salts, it is possible to add 2 more sedimentation tanks for floating salts outside the salt treatment tank; brine can be introduced into these two tanks, but not continuously – it is only added when the level of floating salts reaches a certain height. For specific details, one can visit Jindong in Jintan, as they have their own effective methods for dealing with floating salts
1. The issue of floating salt can be resolved by adding baffles in the salt dissolving tank to separate the side where salt is added from the side where the brine exits. 2. The water is usually heated through a plate heat exchanger or a shell-and-tube heat exchanger before being fed into the salt dissolving tank. Some companies use a soda mixer to introduce steam directly into the brine solution; I’m not sure what the effect of that is Is it running stably? 3. The brine distributor can be made of carbon steel, with its outer surface protected against corrosion using glass flake coating. Of course, it’s good to use PO as the lining and then apply glass flake coating for corrosion protection; there’s no need to use titanium. Salt treatment tanks usually operate in a one-in-use and one-backup configuration, which makes it convenient to carry out corrosion protection on or replace the salt water distributors.
:Victory: Practice is what truly matters. . Learning* now. With so many chlor-alkali plants built, new problems arise with each one.
By using steel-reinforced plastic composite pipes for the pipelines, there is no issue of corrosion. There’s no need to worry about the lifespan then.
What is the size of the opening in the water distributor? What about the hole spacing?
I’ve learned it; does anyone with expertise have the design drawings?
Has your company worked on fine salt dissolution ponds? ? for preparing saturated salt water
How to determine the height of the salt layer in a desalination pond