Evaporators, as commonly used concentration equipment in industry, play a crucial role in production lines. Problems can affect efficiency, and in severe cases, evaporator malfunctions, necessitating production shutdowns for repairs, resulting in economic losses and shortening equipment lifespan.
Proper use of the evaporator and rational production scheduling are essential. Enterprises should arrange production work according to the evaporator's process characteristics.
Establish scientific regulations and procedures. Correct use of chemical wastewater evaporator equipment requires scientifically feasible regulations, tailored to the enterprise's actual situation and equipment characteristics.
Regular cleaning of the evaporator is crucial. Evaporator cleaning primarily involves removing scale and dirt from the internal components. Different types of evaporators have varying levels of scale buildup under different operating conditions; therefore, regular cleaning and descaling should be performed based on actual production needs and experience. The cleaning cycle is closely related to production intensity. Evaporator cleaning methods are divided into major cleaning and minor cleaning.
A major wash involves draining the cleaning water. First, reduce the air intake to expel the material from the evaporator. Then, add condensate to the specified level and increase the steam pressure to boil the water and dissolve the scale inside the evaporator. Start the circulation pump to flush the pipes. Once the washing requirements are met, reduce the evaporator pressure and drain the cleaning water.
A minor wash does not drain the cleaning water. Evaporators are prone to scaling on the heater. When the scaling area is small, periodic water washing can remove localized scale buildup in the heating chamber. Minor washes are suitable for this situation. The method involves first reducing the steam output, then draining the material from the heating chamber and circulation pipes. Once the water level in the circulation pipes reaches the specified level, increase the steam pressure and restore normal production, allowing the cleaning water to circulate and wash the evaporator.
Evaporator operation requires regular monitoring of parameters such as evaporation temperature, vacuum level, and condensate flow rate. The feed rate should be adjusted according to the characteristics of the feed liquid. For example, high-concentration feed liquids require batch evaporation to avoid scaling and blockage; while heat-sensitive feed liquids require controlling the evaporation temperature to not exceed 60℃. In addition, the cleaning cycle is also a key factor affecting the lifespan of the equipment. Evaporators in hard water environments need to be chemically cleaned monthly, while those in soft water environments can be cleaned quarterly.
