Using large amounts of circulating water for replenishment, without adding any chemicals – will this have an impact on the equipment? ? ?
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In our circulating water system, there is a leak in the heat exchanger, which causes the COD level in the circulating water to be too high. The level was over 300 units the day before yesterday; after carrying out extensive drainage and replacement operations, it was still around 200 units yesterday. We continue to carry out these drainage and replacement actions. The entire system will need maintenance in about ten more days. If the levels remain high according to today’s tests, we plan to continue with these drainage and replacement procedures without using any chemicals, and keep the system running for another ten days or so. This is equivalent to a direct-current cooling water system; it wastes some water, and corrosion in the system may be slightly greater. I would like to ask everyone if there will be any effects if it continues to run like this for over ten days? Waiting online, thank you!
Large-scale discharge and replenishment of circulating water, without the use of chemicals; it has no impact on the equipment, but it results in waste of energy and water resources.
During this period of intensive nourishment, it is possible to increase the processing volume (without turning on the fan)； When it comes to the impact on heat exchangers, you need to analyze the quality of your raw water. If the quality of the raw water is fine, then operating the system for over ten days without using disinfectants or scale removers will have no effect on the heat exchangers
It can run, but the cost will increase
It’s fine for a short period of time, but water quality also needs to be taken into account; high hardness can cause scaling. Resources are also wasted.
The system isn’t affected; it’s just a waste of water, which means higher water bills. It can be fixed after maintenance is carried out! You can contact them for repairs: lol
The extent of the impact depends on the quality of the raw water. By providing abundant nourishment, the concentration ratio is reduced; from this perspective, it is possible to decrease the degree of scaling. However, since scale accumulation can easily occur on the high-temperature heat exchange surface of the changer, especially under conditions of high temporary hardness, this issue cannot be ignored. Monitoring should be strengthened; when the water valve is opened wider and the temperature at the outlet of the heat medium rises, the load must be adjusted promptly. As for corrosion, the COD level here is too high, which results in low oxygen content in the water. Since the system is only meant to operate for about ten days, there shouldn’t be any major problems. Instead, attention should be paid to the growth of microorganisms and the accumulation of sludge, as these can affect heat exchange. Finally, after parking the vehicle for maintenance or replacing the heat exchanger, perform a cleaning and pre-coating procedure: victory:
Why go to such extreme lengths to nourish the body? If the goal is to control COD, zero-discharge circulating water technology can be used to ensure no wastewater is discharged over the long term. This way, water is conserved without causing pollution to the environment.
Generally, there’s no big problem! It is recommended that you send over your factory’s water replenishment details and the water quality reports from the past few days, so that we can give you some suggestions!
In the early stages of leakage, heterotrophic bacteria proliferate, followed by an increase in silt, which leads to a rise in the amount of fine sediment in the water and an increase in turbidity. Leak source identification: Gas chromatography is used to conduct qualitative and quantitative analysis of organic substances in the circulating water, which allows for the identification of the type of organic material that is leaking. Based on the analysis results, it is possible to determine which type of heat exchanger is leaking, thereby **reducing the scope of search and enabling quick identification of the heat exchanger responsible for the leak. Analysis of COD: Among the heat exchangers where leaks are suspected, as identified by gas chromatography, water samples from the outlet of each heat exchanger are taken to analyze their COD levels. The COD data of the circulating water over recent periods is retrieved using a LIMS system for comparison; it is also compared with the COD level of the total circulating water supply. If the COD level of the water coming out of a heat exchanger is higher than that of the total circulating water supply, it indicates a leak, thereby allowing identification of the specific heat exchanger or heat exchangers that are leaking. To stop the source of leakage, any leaks that can be fixed should be repaired as soon as possible. If it is not possible to eliminate the leak while the production facility is running, then water is discharged through the pipes that carry water back into the circulation system, in order to minimize the amount of leakage that enters this system. Only after that are measures such as adding chemicals for disinfection, using stripping methods, or discharging the liquid taken to address the issue. 3.1.1 Short-term leakage treatment plan For short-term leaks: After promptly sealing the leak, an oxidizing disinfectant (liquid chlorine) is first added to raise the residual chlorine level to 0.5–1.0 mg/L, and this level is maintained for 2–4 hours. Afterwards, a non-oxidizing disinfectant is added to the system in a shock dose; wastewater is then discharged to replace it once the system’s turbidity reaches its maximum. Once the replacement is complete, the normal dosage of chemicals is adjusted, and the system resumes normal operation.
There will definitely be an impact, but there won’t be any significant effects in the short term. It is recommended to identify the leak point and remove the leaking heat exchange equipment from the system, cooling it with tap water separately; this way, the entire system will not be affected.