About the storage of caustic soda

Where does the water come from for the hot water kettle you use at home?

This is what I think, and it is easy to understand, because there may not necessarily be an alkali on it. Ascension, I understand, can play the role of air barrier, that is, when alkali is not applied, the alkali in the storage tank will not flow back. A little insight

Generally, liquid materials must be fed from the upper part and discharged from the lower part. There is no resistance to the upper part feeding, and there is no need to explain the lower part discharging.

Both are possible, the key is that the pipe must be extended inwards.

Advantages of tank top entry: 1. No resistance to feeding 2. No siphon phenomenon in the pipeline

It is not necessarily the case that all materials are fed from the top of the tank, some are also fed from the bottom of the tank.

The situation of the unit in front of us is a bit special. The geographical location of the storage tank is slightly higher. In addition to the height of the storage tank itself, it is much more difficult to apply alkali to the irrigation area than to the evaporation device. As long as the valve on the evaporation device is not closed enough (the opening must be below 30%), basically the electrolytic alkali cannot reach the storage tank, which is quite troublesome. The alkali we send to PVC and sewage treatment does not need to open the pump. We only need to open the inlet and outlet valves of the pump. The alkali from our D-330 (caustic soda intermediate tank) will flow to both of their devices! In addition, after the storage tank has been used for a long time, a large amount of impurities will accumulate at the bottom. There are a lot of ferrous metal substances and other impurities brought by electrolytic cells and pipes at the bottom of the caustic soda storage tank. Entering from the top has a stirring effect, which can slow down the accumulation of impurities, and some of them are taken out of the device together with the product. If the storage tank has been used for a long time, you will find a lot of sediment inside when you open it again, just like the blackening of the ion membrane in the electrolyzer. Many impurities are caused by that! Please tell me if I’m wrong! This post was last edited by 181128425 on 2009-2-19 09:54 ]

The upper feed pipe extends into the bottom of the tank. I feel that the siphon and resistance cannot be explained, but instead increase the amount of pipeline.； Let’s see if anyone has a better explanation, thank you!

Generally speaking, there are a lot of ferrous metal substances and other impurities brought by electrolytic tanks and pipes at the bottom of caustic soda storage tanks. Feeding from the top of the storage tank will not stir up the original materials on a large scale, and the impurities in the newly entered materials will easily sink to the bottom. If the materials are fed from the bottom, a large amount of impurities accumulated at the bottom will be stirred up, affecting the appearance of the product. Please tell me if I’m wrong!

In and out, it's normal. Upward--Generally, a catholyte pump is needed to drive the finished alkali into the finished alkali storage tank, and the downward outflow facilitates the outflow under the action of gravity. Easy to operate, very normal things, don’t think too complicated.

Our factory enters from the top, but it extends to the bottom of the tank. The first reason for entering from the top is to prevent the liquid from flowing back, and the second is to avoid standing on the ground space. I think it is okay to enter from the top, but you have to choose based on your actual situation.

In this way, the pressure of the pump does not need to be too high~ For industry, economy is also very important.~

The upper feed pipe we use is not inserted into the bottom of the tank, so there is no problem of resistance caused by siphonage and alkali liquid level. The lower discharge can make full use of gravity, but it cannot be opened at the bottom of the tank. A certain space should be left to precipitate salt and other impurities.

When we prepare the alkali solution, when the dilute alkali tank enters the concentrated alkali, it goes in and out. Concentrated alkali is pumped into the dilute alkali tank.

Feeding materials from the top of the tank, the resistance of the alkali pipe is small, the power of the pump is easy to control, and the energy consumption is small. Therefore, most materials are generally fed from the top. There is also bottom feeding, which is equivalent to adding a liquid seal to the pipeline, which is prone to air blockage.