Stainless Steel Falling Film Evaporator
- High-accuracy solid-liquid separation for industrial liquid filtration.
- Available in 304, 316, or 1Cr18Ni9Ti stainless steel for corrosion resistance.
- Threaded filter plate structure compatible with microporous membranes and filter cloth.
- Supports primary and fine filtration in sequence with a single liquid feed.
- Suitable for chemical, pharmaceutical, food, laboratory, and industrial liquid filtration.
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Parameter |
Details |
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Flow processes |
Forward flow, backward flow, mixed flow, and parallel flow |
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Working principle |
Feed liquid is evenly distributed across the heat exchange tubes and flows downward as a thin film. The heating medium on the shell side supplies heat, causing part of the liquid to evaporate. The vapor-liquid mixture then enters a separation chamber. |
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Main components |
First-, second-, and third-effect heaters, separators, thermal vapor recompression pump, condenser, sterilizer, insulated piping, feed pump, water pump, and instrument cabinet |
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Wetted parts |
Stainless steel; grade and material specifications can be confirmed according to process requirements |
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Applications |
Pharmaceutical, food processing, chemical, and light industries; concentration of aqueous or organic solvent solutions; waste liquid treatment; and evaporation of heat-sensitive materials |
The Stainless Steel Falling Film Evaporator feeds liquid into the upper tube box of the heating chamber. A distribution device spreads the liquid evenly across the heat exchange tubes, where it flows downward as a thin film under gravity and the operating conditions created by the vacuum system. Heat from the shell-side medium causes part of the liquid to evaporate. The resulting vapor-liquid mixture enters a separation chamber, where the vapor is separated from the concentrated liquid.
Depending on the system design, the vapor can pass to a condenser or serve as the heating medium for the next effect in a multi-effect evaporation system. The selected flow arrangement depends on the feed material, viscosity, concentration, and sensitivity to heat.
Forward flow:
The liquid and vapor move in the same direction through successive effects. This arrangement can suit heat-sensitive solutions when the operating conditions and concentration range are appropriate.
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Backward flow:
The liquid moves in the opposite direction to the heating vapor across the effects. It can be suitable for solutions with significant viscosity changes as temperature and concentration vary, but may not be appropriate for highly heat-sensitive materials.
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Mixed flow:
Combines forward-flow and backward-flow stages. It offers flexibility for certain process requirements but may require more complex control.
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Parallel flow:
Feed is supplied separately to each effect. This arrangement can be useful for saturated solutions where crystals need to be separated during evaporation.
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Vacuum operation allows evaporation at a lower temperature than would be required at atmospheric pressure. Actual product quality depends on the material properties, temperature, residence time, and operating conditions, so the process should be selected and configured accordingly.
Each Stainless Steel Falling Film Evaporator is configured according to the customer's process requirements. Before production, the flow arrangement, number of effects, evaporation capacity, and available heat source are confirmed. Equipment can be produced according to customer drawings or prototypes, with wetted-part materials selected for the process medium.
Quality checks include drawing confirmation, raw material inspection, blanking inspection and sample testing, finished product inspection, pressure testing where applicable, and appearance inspection. Third-party inspection is accepted. A full inspection is carried out before packaging.
Standard lead time: Approximately 2 months
Customized lead time: Approximately 3 months
Trade term: EXW
Packaging: Generally protected with foam wrapping material; packing details can be confirmed according to shipping requirements
Accepted payment currencies: USD and EUR
Minimum order amount: RMB 50,000
Standard payment terms: 30% advance payment, with the balance due before delivery
Customized orders: 50% advance payment, with the balance due before delivery
Warranty period: 1 year
Please provide the feed material and its properties, target concentration, required evaporation capacity, and available heat source. These details will help determine the suitable flow arrangement, number of effects, and overall evaporator configuration. Drawings or prototypes are also welcome.
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