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Product Details

Product Introduction

Vacuum concentration is a process in which the material is heated under reduced pressure, causing the moisture to evaporate rapidly and form vapor, while the resulting secondary steam is continuously removed. This continuously increases the concentration of the product until it reaches the desired level. The equipment used to carry out this process is known as vacuum concentrators. Single-effect vacuum concentrators are suitable for applications in industries such as traditional Chinese medicine, Western pharmaceuticals, and light chemical engineering, where liquid evaporation, concentration, and syrup recovery are required.

Working principle

Steam (boiler steam) enters the shell side of the first-effect heating chamber, where it heats the liquid on the tube side. Simultaneously, under vacuum, the feed liquid is drawn tangentially into the first-effect evaporator through a nozzle. Once inside the evaporator, the material loses its heat source; part of it spirals downward under the influence of inertia and gravity, while another portion of the water evaporates under vacuum and passes into the vapor–liquid separator. The spirally descending liquid returns from the bottom bend of the evaporator to the heating chamber, where it is reheated and then sprayed back into the evaporator, thus establishing a circulation loop. The secondary steam generated in the evaporator flows into the condenser, where it is condensed by circulating cooling water and collected in the condensate receiver before being discharged by the drain pump. Through repeated cycles, water is continuously removed from the feed liquid, increasing its concentration until it reaches the desired specific gravity, at which point it is discharged through the product outlet as a concentrated syrup.

Product Structure

A single-effect vacuum concentrator consists of components such as a heater, an evaporator, a shell-and-tube condenser, a cooler, and a receiving tank.

Product Features

1. Vacuum concentration lowers the boiling temperature of raw materials during evaporation, thereby avoiding high-temperature processing and helping to preserve their nutritional components; it is particularly well suited for concentrating heat-sensitive materials such as milk.

2. The reduction in the boiling temperature increases the temperature difference between the heating steam and the feed material, thereby enhancing the heat transfer rate, accelerating the evaporation process, and boosting production capacity.

3. Conditions have been created for utilizing secondary steam and conserving energy, such as in double-effect and multi-effect concentration processes.

4. Vacuum concentration is carried out under low-temperature conditions, with a small temperature difference between the equipment and the surrounding environment, thereby minimizing heat loss during operation.

Product Categories

1. Classified according to the number of times the heating steam is utilized: single-effect concentrator, double-effect concentrator, and triple-effect concentrator.

2. Classified according to the flow of the concentrated feed liquid: single‑pass vacuum concentration equipment and recirculating vacuum concentration equipment; the latter is further divided into natural circulation and forced circulation types.

3. Classified by operational continuity: batch-type vacuum concentration equipment and continuous-type vacuum concentration equipment.

Technical Specifications

Friendly reminder:

The technical specifications of the single-effect vacuum concentrators listed in the table are standard values (for reference only); we can also develop customized solutions tailored to the customer’s specific product and material characteristics.

Keywords

Single-effect vacuum concentrator

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