CS238872B1 - Freezer for vacuum distillation apparatus - Google Patents

Abstract

The invention relates to a freezer for a vacuum distillation apparatus consisting of a freezer container provided with an inlet and outlet neck as well as a drain pipe, the essence of which is that in the freezer container (1) the evaporator body (2) is converted into the shape of a single- and multi-pass helix, which directly represents the condensing surface of the freezer, where a deflecting baffle (9) is placed coaxially with the given evaporator body (2).

Description

238872

BACKGROUND OF THE INVENTION The present invention relates to a freezer for a vacuum distillation apparatus which serves to catch and condense the low-boiling components of the distilled mixture. Currently known freeze-drying freezers, in particular liquid-phase evaporators, are designed to cool their condensate traps at low temperatures of -30 to -70 ° C in order to capture and condense volatiles emanating from the evaporation distillation chamber. to protect the filling of the rotary and possibly diffuse pump from being contaminated with solid CO2. For example, in freezers according to MS. AO 171 948 is a container in which solid CO2 is periodically filled.

The disadvantage of these types of freezers is that fast, efficient and economical regeneration of the condensation surface after filling with solid condensate is not possible. In addition to this, CO2 as a coolant is expensive and is not readily available.

It is also known to design a descaler in which a cooling aggregate is used as a source of cold, such that the agarate evaporator is immersed in a container with a suitable liquid, for example ethyl alcohol, which then flows through the freeze condenser and cooler through the pump it. In this type of freezer, low cooling efficiency is achieved.

The above-mentioned drawbacks are eliminated by the freezer according to the invention, the principle of which is that in the freezer container, the freezer body is formed in the form of a single- or multi-threaded bolt and a guide baffle is disposed coaxially therewith.

The design of the freeze dryer using the evaporator of the refrigeration unit directly as a condensation surface of the freezer according to the invention has several advantages. In comparison with a flat capacitor, the coarse cooling surface has a larger cooling surface. A higher cooling efficiency is achieved by immediate cooling and the system has low thermal inertia. Another advantage of the freezer according to the invention is the possibility of simple, efficient and rapid regeneration of a filled freeze trap with a condensate-covered condensate solid directly through the use of hot freon pairs introduced by the evaporator outside the throttle valve.

In the accompanying drawing, there is schematically shown a freezer according to the invention.

The freezer, as shown in Fig. 1, consists of a freezer container 1, in which the evaporator 2 is arranged in the form of a single-pass or multi-pass screw. The ag-regulating coil consists of a compressor 3 which is an inlet conduit 4 connected to a condenser 5 blown by a fan 6 and through a throttle valve 7 with an evaporator 2. The outlet of the evaporator 2 is connected by an outlet conduit 8 to the inlet of the compressor 3. there is a baffle plate 9 in the freezer container 1. The freezer container 1 is provided with an inlet orifice 10, an outlet orifice 11, and a drain tube 12. In the freezer container 1, a thermometer sensor 13 is inserted through the baffle 9 so that it terminates at a distance of 2 to 10 mm from the evaporator 2. The thermometer sensor 13 is sealed by a seal 14.

The cooling unit is brought into operation by the compressor 3. The compressed heat pairs of Freon pass into the cooler S with the fan 6 where they condense. The liquid passing through the throttle valve 7 is vaporized in the evaporator 2 with the shape of a simple or multi-conductor screw, which directly forms the condenser surface of the freezer. The steam-gas mixture from a vacuum distillation apparatus, for example a molecular evaporator, which is not condensable to refrigerators with a temperature generally not lower than 10 ° C and enters the freezer vessel 1 through the inlet orifice 10 at a pressure of the order of units up to one hundredth Pa. around the evaporator 2, on which the condensable components in the form of a solid or liquid condensate are captured, and non-condensable gases are pumped into the pump through the inlet port 11. In the case of solid condensate, e.g. A suitable thermometer sensor 13, for example a thermocouple or a thermistor, having its specific end located at a distance of 2 to 10 mm from the evaporator 2 serves to indicate the frost rupture. with a gradual increase in the solid condensate layer as the heat transfer through the flow is small in vacuum. The thermometer sensor 13 is sealed by vacuum seal 14. When regenerating the freeze-dryer according to the invention, the pump is shut down, the freezer is aerated and the solid condensate does not spontaneously melt or on For the continuous operation of the distillation apparatus, a pair of venous trays are used, alternating the day and one being regenerated.

The helical condensate has a more efficient cooling surface in comparison with the cylindrical condenser. The baffle baffles the gas flow through the freezer so that the cooling surface is uniformly utilized. The design and placement of the baffle are deliberately selected so as not to reduce system conductivity.

Claims (1)

SUBJECT Freezer for vacuum distillation apparatus consisting of a freezer vessel provided with an inlet and an inlet neck as well as a drain pipe, characterized in that in the freezer vessel (1) the evaporator forest (2j) is formed in the form of a single multi-helical screw. wherein a baffle (9j) is disposed coaxially with said evaporator body (2).