The scaling of single effect waste water evaporator is that the material contains a lot of mixed salt. After evaporation and concentration, it will crystallize slowly and form crystal nucleus. When the nucleation is attached to the inner wall of the heat exchanger, it will lead to the scaling phenomenon, and the light will affect the efficiency of the evaporator. The weight will cause the evaporation system to block and affect the normal operation of the equipment so as to stop or stop production, resulting in greater economic loss.
When the evaporator is fouled, the acid washing is generally adopted, and the acid washing is very effective for all kinds of deposition. But this cleaning method is both time-consuming and energy consuming and will cause corrosion of the equipment, and if the equipment is designed, we consider the occurrence of scaling in advance and take precautions against Scaling in advance. From the source to reduce the occurrence of problems, thereby enhancing the stability of equipment.
Therefore, in the design stage of single effect wastewater evaporator and multi effect evaporator, the potential scaling was designed and processed in advance, so as to postpone the formation of scaling as much as possible.
In the design stage of evaporator, bang yuan drying is mainly considered from 6 aspects:
(1) the design of single effect wastewater evaporator and multi effect evaporator focuses on the cleaning and maintenance after the installation of heat exchangers, and the on-line cleaning technology of state source can clean the equipment while ensuring the production.
(2) the velocity distribution in the heat exchanger should be uniform so as to avoid larger velocity gradients and ensure uniform temperature distribution (such as baffle area).
(3) under the premise of ensuring reasonable pressure drop and no corrosion, increasing the flow velocity of the solution will help to reduce the fouling.
(4) using automatic precision instruments to monitor liquid feed value to prevent excessive concentration of slurry.
(5) design as low as possible evaporation crystallization, prevent heat exchanger surface coking and scarring, but also conducive to prevent scaling.
(6) the processing technology of the heat exchange surface is smooth and further reduces the scaling of the material liquid on the heat exchanger surface.
State source dry Environmental Protection Technology Co., Ltd., dedicated to energy conservation, innovation technology and efficient heat transfer technology field, from design to operation to provide you with a one-stop solution, thoroughly solve the "system blockage," "evaporation decline", "no salt" and other industry problems. It has successfully helped hundreds of enterprises to solve the difficult problems of wastewater treatment.