FLUSHING - Chemical cleaning

Purpose in FLUSHING

In thermal mechanical equipment such as heating and cooling closed cycle systems, cooling towers, steam boilers, steam generators, water used as a thermal transfer flow in production industrial processes has calcification, sedimentation, silting, wear (corrosion) and biological activation effects. Deposits caused by such effects lead to waste of energy, time and labor. For this reason, it is important to apply flushing operations by qualified technicians in thermal processes working for special purposes with newly manufactured or used heating-cooling closed cycle systems.

Causes of pollution

The word "Flushing" means washing with a large amount of water and is classified as a "first flush" method for closed cycle systems. Residues and dirt sticking to the equipment and pipe walls cannot be removed and cleaned by washing with water alone. Flushing with water only removes some of the simple deposits on surfaces. It does not affect the oil layer on the pipe surfaces. As a result of such application, the measured values of "ΣFe" in water are measured to be low. But this measurement is misleading. Most of the dirt adheres to surfaces with chemical and physico-chemical properties. Eliminating these pollutants
For this purpose, "Flushing" should be applied with the support of chemicals with physical and chemical properties that do not damage devices, equipment and pipes.
In "Flushing", the process should be carried out in a certain time frame, taking into account the effectiveness of the chemical substance and, in addition, the corrosive effect of oxygen in the water. After the operation, since the pipelines of the pipes, equipment and devices are cleaned, the corrosive effect of oxygen in the additional water received will be at the highest level. For this reason, a chemical protection program should be started without delay after rinsing. Starting a chemical protection program without flushing will not provide the expected protection effect and will accelerate corrosion and silting depending on water characteristics and contaminants.
Oxidizing (corrosive) moisture and O2 in the air during the production stage of metal pipes, molding and storage
different types of fatty protective substances are injected in order to protect it from its effects. The oil layer on the inner surface of the pipe, which forms a closed cycle system, captures the existing chemical composition in the water and creates sludge in a short time. Due to the structural characteristics of the mechanical pipe system, the chemical composition of the water hardens over time and forms a thick layer. Iron residues and inorganic dust and particles formed from the construction site remain inside the pipe system. The mentioned particles are transported in the circuit under the influence of pressurized water and are collected inside and at the connection points of the pump, heat exchanger, serpentine boiler, drawers and similar devices. Hard layering and residues accelerate the formation of various types of corrosion, and this layer reduces thermal conductivity and adversely affects the fluid flow regime.

Adverse effects
 

As a result of these results, the working efficiency of the devices and equipment in the mechanical pipe system is significantly reduced, as well as the useful work coefficient and life are reduced and they become unusable. As a result, energy loss (fuel, electricity), operating [labor, material] costs increase, total operating costs increase due to downtime and maintenance. Another risk that has a negative effect on mechanical devices is the penetration of bacteria or external influences into the system along with water. The presence of bacteria in the system reduces the effectiveness of chemical defense programs to be applied in the system and has a negative effect on the heat transfer of heating devices.
For this reason, we recommend the effective application of the washing process by our technical staff in newly commissioned or existing heating and cooling closed cycle systems, thermal process equipment used for special purposes.