Single-Effect Concentrator

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Overview

The characteristics of single-effect concentrators are suitable for industrial alcohol recovery in traditional Chinese medicine, western medicine, glucose, brewing, starch, oral liquids, chemical industry, food, natural flavorings, food additives, monosodium glutamate, dairy products, etc. Single-effect concentrators can be used for vacuum concentration of small batches and multiple varieties with low thermal sensitivity.

Alcohol Recovery:
With a large recovery capacity, it adopts a vacuum concentration process. Compared with the old-type single-effect concentrators of the same kind, it increases productivity by 5-10 times and reduces energy consumption by 30%. It is characterized by small investment and high recovery efficiency.
Concentration of Liquid Materials:
The single-effect concentrator combines external heating natural circulation with vacuum negative pressure evaporation, featuring fast evaporation speed and a concentration ratio of up to 1.3. Liquid materials are concentrated without foam in a fully sealed state. The medicinal liquid concentrated by the single-effect concentrator is pollution-free, rich in medicinal flavor, and easy to clean (simply open the upper and lower covers of the heater for cleaning). The single-effect concentrator is simple to operate and occupies a small floor area. The heater and evaporator adopt stainless steel thermal insulation structures, with the insulation layer enclosed by a stainless steel thin plate shell, and the surface is mirror-finished or matt-treated.

Structure and Performance

The single-effect concentrator is composed of components such as the heating chamber, separator, defoamer, vapor-liquid separator, condenser, cooler, liquid storage tank, and circulation pipe. The entire set of single-effect concentrator equipment is made of high-quality stainless steel materials.

The heating chamber adopts a tubular structure internally. The shell side is connected to raw steam to heat the liquid inside the heating tubes. The liquid addition chamber is equipped with a pressure gauge and safety valve to ensure production safety.

The front of the separation chamber of the single-effect concentrator is equipped with a sight glass for operators to observe the evaporation status of the material liquid. The rear manhole facilitates internal cleaning of the chamber when changing varieties. It is also equipped with a thermometer and vacuum gauge to observe and monitor the temperature of the material liquid in the evaporation chamber and the vacuum degree during negative pressure evaporation.

Working Principle

Raw steam enters the outer side of the tubular bundle in the heating chamber, heating the material liquid to rise. The liquid is sprayed into the evaporation chamber through a nozzle for vapor-liquid separation. The material liquid returns to the lower part of the heating chamber via the circulation pipe for reheating, and the heated liquid is sprayed again into the evaporation chamber to form a circulation. When the material liquid in the single-effect concentrator is concentrated to a certain degree, it is discharged from the outlet after sampling confirms compliance.

The vapor evaporated in the evaporation chamber first passes through a defoamer to eliminate foam, then goes through a vapor-liquid separator. Part of the material liquid is returned to the evaporation chamber, while the remaining secondary steam is cooled into liquid by a condenser and cooler, entering the liquid storage tank. Finally, non-condensable gases are discharged into the atmosphere or carried away by a vacuum pump.

Design, Manufacturing and Inspection Standards

SFDA Good Manufacturing Practice for Drugs (2010 Edition)
Code for Design of Clean Rooms in Pharmaceutical Industry (GB50457-2008)
GAMP (Good Automated Manufacturing Practice) for Pharmaceutical Production
GB150.1~150.4-2011 Steel Pressure Vessels
NB/T47003.1-2009 Steel Welded Atmospheric Pressure Vessels

Technical Parameters

Specification Model	DNS-500	DNS-1000	DNS-2000	DNS-2000
Evaporation Capacity (kg/h)	500	1000	1500	2000
Recovered Alcohol Concentration (%)	80%	80%	80%	80%
Steam Pressure (MPa)	0.09	–	–	–
Vacuum Degree (MPa)	0.02-0.09 MPa	–	–	–
Heating Area (㎡)	10	20	30	40
Evaporation Chamber Volume (m³)	1.0	1.5	2.0	2.5
Condensing Area (㎡)	25	50	75	100
Steam Consumption (kg/h)	550	1100	1650	2200
Equipment Weight (kg)	1450	2000	3000	3700