Sodium sulfite evaporator do you understand? What is a sodium sulfite evaporator? What is the use of sodium sulfite evaporator?
Sodium sulfite evaporator is an evaporator equipment for the production of anhydrous sodium sulfite, sodium sulfite evaporator selection can be designed according to the size of the processing capacity and the production process of sodium sulfite different evaporation processes.
Sodium sulfite in the production, before many manufacturers used cauldron open fire evaporation, multi-pot series evaporation concentration, the process operation is simple, easy to operate, but the product quality fluctuations are large and easy to cause the phenomenon of collapse, after the design of the rotary film evaporator, with the development of evaporation technology, sodium sulfite evaporator gradually began to use multi-effect, MVR, forced circulation and other evaporation processes.
In the production process of sodium sulfite, the raw material concentration is 20%, the temperature is 25 degrees, and the processing capacity is 24T/H, so the four-effect evaporation process is selected.
In a single-effect evaporator, every 1Kg of evaporated water consumes more heating steam than 1Kg, and in industrial production, evaporating a large amount of water must consume a large amount of heating steam. To reduce heating steam consumption, multi-effect evaporation operations can be employed.
When multi-effect evaporation, the operating pressure of the after-effect and the boiling point of the solution are lower than the pre-effect, so the secondary steam of the pre-effect can be introduced as the post-effect heating medium, that is, the post-effect heating chamber becomes the condenser of the pre-effect secondary steam, and only the first effect needs to consume raw steam. The final or subsequent effects of the general multi-effect evaporation unit are operated under negative pressure conditions.
Sodium sulfite evaporator in the choice of feeding method, there are downstream, advection, counter-current, mixed flow feeding method, according to the characteristics of the sodium sulfite solution, and evaporation water according to the evaporation amount of 20 tons per hour, you can choose four-effect forced circulation evaporator.
According to the discharge temperature requirements of sodium sulfite, downstream operation can be used. The dilute solution is first preheated by two stages of condensate and then fed into the evaporator, making full use of the heat of high-temperature condensate. The condensate is discharged by the pump, reused or discharged, and the evaporated concentrate is discharged from the pump to the lower section.
What kind of evaporator is used in the sodium sulfite evaporator, and what kind of production process is selected cannot be separated from the actual working conditions, and the appropriate products should be selected in a targeted manner.