Equipment circulating cooling water treatment

“The water in the circulating pool is very dirty, and it is judged to be "sludge". It should be because the growth of algae and moss is relatively strong. After adding fungicides, the corpses of algae and moss appear in the circulating water, forming a large amount of slime. As far as I know, the conductivity of tap water should be around 200us/cm, but the conductivity of your circulating water is controlled between 1600-1700. The control should be too large, and sewage discharge should be strengthened.

Sewage discharge consumes too much water, so the cost has been changed from 1500 to 1600. This is the current situation.

A large amount of slime produced by circulating water generally occurs more in summer. As you said, if a large amount of slime occurs in this season, you should consider whether there is an increase in organic matter in the water, that is, whether there is a leak in the cooling exchange equipment of the device, and strengthen the measurement of the oil content and turbidity in the water. What is the concentration factor of your circulating water? Water quality stabilizer preparation Please consult the chemical supplier to determine whether the method is suitable for operation under this condition. Conductivity is not the only criterion for judging the quality of circulating water. Some manufacturers use good chemical formulas. The concentration ratio of circulating water can be operated at 7-8, and the conductivity can be as high as 8000. In addition, bypass filtering equipment can be added to the system, which has a very good effect on reducing the turbidity of circulating water.

Adding side filtration to the circulating water system is a means to reduce suspended solids and turbidity in circulating water. Generally, the processing capacity of side filtration is 5% of the total circulating water volume. The concentration factor should generally be controlled between 3 and 5. If the concentration factor is too high, the scaling tendency of water will increase, the difficulty of scaling control and corrosion control will increase, and the water treatment chemicals will become ineffective, which is not conducive to the control of microorganisms. Therefore, the concentration factor of circulating water must have a reasonable control index. Generally, when the concentration ratio is low, the water consumption is large and the amount of sewage discharge is also large. ； High concentration ratio can reduce water volume and save water treatment costs. However, if the concentration ratio is too high, the hardness, alkalinity and turbidity of the circulating cooling water will rise too high, and the scaling tendency of the water will increase a lot, making scaling and corrosion control more difficult. The residence time of water treatment chemicals (such as polyphosphate) in the cooling water system will increase and cause hydrolysis. Therefore, the concentration ratio of circulating cooling water is not as high as possible.

Strengthen sterilization and algae removal. If you add slime stripper every week and increase sewage discharge, this phenomenon will be improved!:handshake

We stopped the side filter in the summer due to insufficient water supply, and only reopened it in the fall. Now I have the opportunity to stop the car, drain and clean the pool, and re-pre-membrane it, hoping it will get better. thank you all

What is water used for? What does your factory produce? ? What biocides were used? Does this happen in winter? ?

Air separation plant. Circulating water is the cooling water of the centrifugal compressor. The medicine is from Anzhi Chemical Industry. The main reason is that there is a lot of mud and we didn’t stop the car before, so we have to deal with it now. It's up to the manufacturer. Thank you for your concern

I know that the poster has done his best to help us add points. No matter what the score is, at least it is an affirmation of our reply. Thank you, poster.

Where is the original poster located? There shouldn't be a lot of algae in winter? But the phenomenon you are talking about is caused by the massive growth of algae! Increase sterilization efforts (use stripping fungicides)

There is slime in the cooling water. I think the process heat exchange equipment may be leaking and organic matter has entered. Please check the heat exchange equipment. In addition, you must add a bactericide, such as sodium hypochlorite, etc., which can control the free chlorine content in the cooling water to 0.2-2.1ppm. In addition, if scaling occurs, decarbonized water can be used as the water supply for the cooling tower.

The heat exchange equipment has been checked for leaks. The working medium is air and nitrogen. The pool was recently cleaned. On the one hand, there was sludge. There was a problem with the water cooling tower coating. The paint film fell off and entered the circulating water. In the past, the filling of another cooling tower of our equipment was aging and blocking the heat exchanger channels, which wasted a lot of manpower to clean it up. According to everyone's judgment, the water in the pool is now changed and the heat exchanger pipes are flushed. The water is already very clear. Re-pre-film and add medicine to see what the heat exchange effect will be. The manufacturer doesn't think it's a problem with the medicine, it's mainly because we don't discharge enough sewage. Our engineers added a cofferdam to the return water basin and sent people in regularly to clean up the accumulated silt. The effect is now good.

If the flow rate of the side filter is small, it can be changed. It can be said that the flow rate will increase when the filtration accuracy of the filter decreases, but it will not be obvious. Our side filters are sometimes said to have different filtering precisions and different flow rates.

What was said above is correct. For the same filter size, if the precision of the filter element or filter bag inside is higher, the flow rate will decrease, and vice versa.

Oxidizable bactericides and oxidizing bactericides are used alternately to shorten the dosing cycle. Increase the amount of sewage discharge 24 hours after dosing. And the side filtering effect must be guaranteed. If the slime in the bacterial bath cannot be drained out, it will cause a vicious cycle

The opinions above are very good. Sterilization to increase sewage discharge and replenishing water to increase bypass filtration are both good suggestions. Supplement: In this case, there may be a leak in the system. You should check whether there is leakage in the heat exchanger or water equipment. At the same time, determine whether the membrane has been damaged and decide whether to perform cleaning and pre-membrane treatment.

To control the turbidity of the water, if there is a lot of sediment, you can consider adding a bag filter to the fresh water inlet of the circulating water. The effect will be very good!