What are the precautions for resin temperature in softened water treatment equipment?

Ion exchange resin operating temperature:

The use temperature of ion exchange resin is mainly determined by the nature of the resin group, in general, the temperature resistance of cation exchange resin is higher than that of anion exchange resin, salt type resin is better than H type or OH type, and salt type is better than strong alkaline anon resin, the maximum use temperature of ion exchange resin is according to different types and models, and the temperature that can withstand is also different, so before use, You can check the maximum operating temperature of the model on the official website of Blue Film, or you can ask customer service.

Storage temperature of ion exchange resin:

The best temperature of ion exchange resin storage is generally 5-40, can not be lower than 0, when the storage temperature of resin is lower than 0, the resin is easy to freeze, resulting in the mechanical strength of the resin decreases, the resin particles are damaged, affecting the service life of the resin, the maximum temperature of storage is best not to exceed 45, if it is exceeded, it may lead to dehydration of the resin, resulting in a decrease in performance, and shorten the storage time of the resin.

Resin in the equipment is mainly small wastewater treatment equipment manufacturers have the purpose of adsorbing the impurities contained in the water, so the water will meet the national standard, but if you want the resin to play its role stably and long-term in the use of softened water treatment equipment, we need to pay attention to the following matters:

Test the temperature of the paper mill wastewater treatment equipment manufacturer using the resin, and the relevant test results show that the resin has a better temperature suitable for its own use range, and if the temperature is too high or too low, it will affect the normal volatilization effect of the expired resin. When the temperature is too low, the resin will easily cause freezing, which will reduce the strength of the softened water treatment equipment, affect the normal service life of the resin, and also reduce its exchange capacity. When the temperature is too high, it will cause the thermal decomposition of the resin, which will also have a certain impact on its exchange capacity and life.

Therefore, if you want the resin to exert its super service life, you must grasp the temperature during use.

The temperature of the resin should not be too low, and if it is too low, there is a risk of freezing.

Reasons why the resin is frozen:Ion exchange resin in the factory, the inside contains a certain amount of moisture, when the ambient temperature is below 0, the moisture in the resin is affected by the environment, it will freeze, this is the reason why the resin is frozen, if the resin is frozen, then it may lead to the performance of the resin to decline, serious and even cause the resin to lose its effect, so the general temperature is low in the area, in the winter will generally carry out anti-freezing measures on the resin.

How to solve the problem that the resin is frozen? The temperature of the area where the resin is transferred can not be too high, generally around 10-25, to prevent thermal damage to the resin, and when transferring the resin, the frozen resin needs to be handled with care, so as to avoid mechanical damage to the ion exchange resin.

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Pro, softening resin is a special resin dedicated to softening hard water, through ion exchange technology, so that the hardness of water is less than 50mg L (CaCO3). Ion exchange is a special dynamic adsorption process, which is generally carried out by an ionic exchanger insoluble in water in an electrolyte solution, which is an ion exchange resin.

What is the softening point of water treatment resin?

What is the softening point of water treatment resin?

How to understand the softening point of softening resin.

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The disadvantage of the water treatment resin softening wheel is one of the important indicators to detect the temperature resistance of the resin.

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Pro, which judge softening resin is a special resin dedicated to softening hard water, through ion exchange technology, the hardness of the water is less than 50mg L (CaCO3). Ion exchange is a dynamic adsorption process that is generally carried out in an electrolyte solution by an ion-exchanger insoluble in water, which is an ion exchange resin.

If you are asking about the amount of resin filling (i.e., the filling height), the softening resin is changed from Na type to Ca and Mg type, and the transformation expansion rate is very low, so you can leave about 30% of the backwash space. If you are calculating the amount of resin, the following is a simple calculation method, which is not very accurate, but can be estimated roughly:

1. Water quality and treatment capacity of softened (sodium) bed raw water:

1. Hardness of raw water (in terms of calcium carbonate) 2. Water volume per hour.

2. The number of moles of raw water hardness and the amount of resin exchange per cubic meter:

1. Softened cation resin working exchange capacity: 1000mol m 2. Calculation method of molar concentration of raw water hardness:

Raw water hardness. Raw water hardness molar concentration = --

CaCO3 molar equivalent number (50).

3. Calculation method of water volume per cubic meter of softened cation cation resin exchange treatment:

Resin working exchange capacity 1 cubic resin volume.

Resin per cubic meter = --

Raw water hardness molar concentration = --

3. Resin line flow rate and layer height:

1. The linear flow rate of softened (sodium) bed cation resin is: 15-30 meters per hour 2. The loading height of softened bed cation resin is meters, and the diameter of the equipment is meters.

3. The backwash space of the softened bed is 30 50% of the total height of the resin filling.

Different series of equipment are different. The fixed bed should be placed a little more. Floating beds don't have to be too much. Just put enough on the flow bed. Too much will run out

How should softening resin be used?

Reloading: 1Put clean water into the resin tank first, the height is about one-third of the resin tank, which can effectively prevent the resin from colliding with the resin tank and causing damage to the resin.

2.The resin is put in from the top of the resin tank and backwashed in about 30 minutes.

3.Drain to the liquid level 5cm above the resin layer, and mix the resin for 15 20 minutes.

4.Start the equipment, test the positive washing effect and the conductivity of the effluent, if the data is normal, and the water production can meet the standard, it can be used normally.

Backwashing: After the resin works for a period of time, there will be a lot of impurities on the resin, in order to use the resin better, these impurities need to be removed, the general steps are: water from the bottom of the exchange column, water from the top, backwash the resin until the water is clear.

Regeneration: Use a certain concentration of salt water to clean the resin, (the experiment proves that the cleaning effect is better than the soaking effect) The flow rate can not be too fast, the general regeneration flow rate is about 10 15m h, and it generally takes about half an hour to clean, and the cleaning time needs to be decided according to the actual situation when regenerating.

Cleaning: After cleaning in the salt water, rinse at the same flow rate as the salt water to clean all the salt in the resin, which is also one of the processes of resin regeneration, so many people call this process replacement, and the time is about 30 minutes.

The reclaimed liquid of softened water equipment mainly involves the contact time of regenerated liquid and resin, we usually control the flow rate of regenerated liquid at 4 8 meters per hour, if the contact time between regenerated liquid and resin is insufficient, it can be solved by adjusting the concentration of regenerated liquid, flow rate or changing the diameter of demineralized water equipment. Strong ion exchange resins have a regeneration concentration of 2 to 5 percent. The regeneration concentration of weak ion exchange resin is 0.5% to 5%, which is easy to regenerate, but has little effect on the regeneration efficiency.

The concentration of salt should not be too high when regenerating softened water equipment.

The concentration of salt during regeneration has an effect on the reverse ion exchange equilibrium, and if the salt concentration is too low, the regeneration effect is poor. Different cations have different ability to enter the exchanger, and when the water is softened, the higher the salt concentration, the higher the degree of regeneration, and when the concentration reaches a certain value, the degree of regeneration also reaches the highest value. Therefore, if the concentration is increased, the degree of regeneration will be reduced, because the concentration of salt is too high, which will have a compressive effect on the exchange group of the exchanger, and the exchangeable ion diffusion.

In addition, the concentration of salt is high, and the concentration of remaining salt in the waste liquid produced is also high, and the loss of salt is also large, so the concentration of salt solution should be moderate when mastering regeneration, not too little and not too much.