Selecting a High-Salt Wastewater Evaporator

High-Salt Wastewater EvaporatorDuring the manufacturing process, components such as mechanical pumps, chilled centrifugal pumps, operating platforms, electric heaters, various stages of volatile separation equipment, coolers, and various stages of forced circulation pumps are typically used.

The high-salt wastewater evaporator, to some extent, effectively incorporates the characteristics of the treated materials with a wide scope. During operation, it is primarily used for raw materials that are prone to scaling during the evaporation process, as well as materials with crystallization during evaporation, materials with increasing viscosity as extraction concentration rises, and materials containing insoluble solids.

High-salt wastewater evaporator raw materials are heated through forced circulation during the evaporation process, resulting in faster flow within the tubes, uniform heating, and high thermal conductivity. This helps effectively prevent the dry wall condition. The料liquid is quickly heated through an electric heater by the forced circulation pump, and upon exiting the top, it is immediately transferred to the evaporation and separation equipment, where the separation of vapor and liquid is clearly evident.

High-salt wastewater evaporator raw materials are efficiently utilized through the machine's evaporation concentration process. Combined with vacuum packaging and ultra-low-temperature evaporation concentration, and the use of a rotary feeding system, the heating and volatilization time is significantly reduced, making it suitable for heat-sensitive evaporation concentration of food-based sauces and materials.

Choosing High-Salt Waste Water Evaporators

1. Selection of Effectiveness: First and foremost, consider the size of the material to be processed, the increase in melting point of the volatile material, and the capacity of the machine. If the volume of processing is large, opt for multi-effect operation; the higher the effectiveness, the lower the steam consumption and the higher the initial investment in equipment; the greater the elevation in boiling point will also result in a smaller rational temperature difference, necessitating a reduction in the number of effects.

2. Selection of Steam Condenser: Use indirect coolers, such as tube bundle heat exchangers or spiral plate heat exchangers, when the condensate must be recovered. If the condensate is not to be recovered, immediate coolers like air coolers or water jet pumps are required. In cases where the final effect is natural pressure evaporation, the condensate can be exhausted immediately without a cooler.

Step Selection: During the operation of the counter-current process, the gas pressure in the downstream effluent chamber is lower than the upstream, and the transport of the aqueous solution between stages requires less pump power. Moreover, since the downstream evaporation temperature is lower, the aqueous solution from the upstream enters the downstream and evaporates a portion of vapor, reducing the steam consumption. However, as the downstream content increases during the counter-current process, the ambient temperature decreases, viscosity increases, and heat transfer rate decreases. In the reverse operation, the upstream temperature is higher and concentration is also high, while the downstream ambient temperature is lower and concentration is lower, making the heat transfer rates of each stage more similar. Nevertheless, the power of the inter-stage transfer pumps is high, and steam consumption remains low. This process is not suitable for heat-sensitive materials and materials that are prone to corrosion with increasing temperature and concentration. Here, the actual raw material conditions can determine the use of plug flow or mixed flow processes.

4. Heating Area: The determination of the heating area for the high-salt wastewater evaporator is made after fully considering various factors such as material balance, heat balance, heat transfer calculations, and selection of process methods.