CS256181B1 - Evaporator cylinder three-stage evaporator - Google Patents

Abstract

A heating column consisting of an upper flange, heating tubes, filling tubes and interstage partitions is inserted into the evaporator cylinder. The upper interstage partition fits tightly against the wall of the evaporator cylinder through the upper interstage seal and the lower interstage partition through the lower interstage seal, thus separating the individual heating chambers. The solution simplifies the construction of the evaporator cylinder and enables maintenance of the heating chambers.

Description

253181

BACKGROUND OF THE INVENTION The present invention relates to a three-stage short, evaporator evaporator cylinder. In the hitherto known multi-stage, usually three-stage, podium evaporators, MS. AO181 054, which has a plurality of cam stages formed on a single vaporizer roll, must be internally vaporized by the interstage bulkheads in order to form independent heating spaces corresponding to the individual stages. Advantageously, these heating spaces can be indirectly heated by the closed evacuated system of liquid carrier and its saturated vapor stages. 127 649, especially for smaller evaporators. In this case, it is necessary to provide heating of the individual heating spaces by means of suitable heating bodies inserted in the heating tubes and also to provide heating spaces with filling tubes which can also be used for measuring the temperature of the heating medium in these heating spaces. that the heating pin, formed by the heating tubes, the filling tubes and the intermediate stages, is assembled together with the evaporator in a gradual and non-disintegrating manner. The evaporator cylinder is assembled from three portions, each of the heating spaces forming a one-stage baffle with respective pipes, which is welded to the inner wall of the steam cylinder. The evaporator thus constructed has several disadvantages. Its manufacturing technology is very labor-intensive and requires the repair of welds on the surface of the roll, while there is a risk of breaking the vacuum tightness, furthermore, it is not possible to control and clean the heat exchange surface on the inner surface of the evaporating cylinder and on the outer surface of the heating tubes. date correction of possible defects in separating partitions and heating tubes, no additional adjustment of the heights of the o-zones on the evaporator cylinder is possible, and finally a smaller diameter evaporator is problematic due to lack of space to provide reliable welding of the heating and filling tubes by electric arc.

The aforementioned drawbacks are eliminated in the steam cylinder of the three-stage short-path evaporator with the heating column formed by the upper flange, the heating tubes, the filling tubes and the intermediate stages of the invention, the principle of which is that the heating rod is inserted in the evaporating cylinder body such that the upper intermediate barrier adheres tightly to the wall of the vaporizer through the upper intermediate seal, separating the heating space of the upper step from the heating space of the intermediate step, and the lower intermediate stage bulkhead adhering to the wall of the vapor cylinder through the intermediate intermediate seal, separating the central heating space the degree of heating of the lower stage.

The evaporator cylinder for a multi-stage short-path evaporator of the invention has several advantages. The actual evaporator cylinder does not need to be composed of individual parts, with the use of a continuous tube with an unbroken surface. The production of the vaporizer and the heating splitter is thus greatly simplified, especially in the case of vapor rollers with a diameter of 50 - 100 mm. The retractable heating bar allows the heat exchange surface of the vapor cylinder to be controlled by the heating medium and to remove the deposits as well as the heat exchange surface on the outer surface of the heating tubes, which may result in cracking of the heat transfer medium due to the high thermal load of their surface and settling bituminous products. These then cause a significant deterioration in heat transfer. The removable o-heating rod also allows the repair of any leaks on the intermediate stages and the heating tubes, which may also occur for longer periods of operation. It is also possible to abandon the height of the heated spaces by using insho heating stations and other suitable placement of the med-detachment bars.

Of course, this construction principle of a retractable heating element can also be used in a two-stage evaporator.

In the accompanying drawing, there is schematically shown a vaporizing cylinder of a three-stage short-circuit evaporator according to the invention.

The heating element 9, which is closely inserted by the body of the vapor cylinder 2, is provided in the upper part with an upper flange 5, which over the flange gasket 4 abuts the flange of the steam cylinder 13 from above. The evaporator cylinder 2 is bottom-bottom-closed 19. In the upper flange 5, successive upper heating tube 6, upper filling tube 7, central heating tube 8, intermediate filling tube 10, lower heating tube 11 and lower heating tube are attached and hermetically connected thereto. a filling tube 12. Approximately one-third of the height of the heating plate 9 from the upper flange 5 is an upper step barrier 3 hermetically associated with a central heating tube 8, a centered filling tube 10, a lower heating tube 11 and a lower filling tube 12. Approximately in two thirds of the height of the heating plate 9 from the upper flange 5 is placed the lower intermediate partition 1 hermetically connected to the lower heating tube 11a by the lower filling tube 12. The positions of the low-level baffles are suitably chosen to correspond to the desired height. vacuum stages of a three-stage molecular evaporator. The upper interstage 3 seals tightly against the wall of the evaporating cylinder 2 through the upper intermediate seal 15, separating the heating space 14 from the heating intermediate stage 16. The lower intermediate stage 1 seals tightly against the wall of the evaporating cylinder 2 through the lower intermediate stage. sealing 17, separating the heating of the central stage 16 from the heating space

Claims (2)

Fluorocarbon O-rings may advantageously be used as interstage seals. The hundreds of heating stages are about 60-30% filled with a suitable heat transfer medium such as Dowtherm. All O-pipes are closed at their bottom and are fitted with suitable shaped electrical resistance sources, operating at the appropriate level. All filler belts are open at their bottom and can be excised in addition to filling the respective o-heater & evacuation and evacuating the appropriate control temperature sensors, such as contact pressure gauges or resistance thermometers. OBJECT A evaporator cylinder of a three-stage short-path evaporator with a heating column, formed by an upper flange, heating tubes, filling tubes and intermediate stages, characterized in that the heating element (9) is inserted in the body of the evaporator (2) so that the upper interstage barrier (3) seals against the wall of the vaporizer (2) through the upper intermediate seal (15), separating the space heating stage (14) from the intermediate stage heating space (16), and the lower intermediate stage the partition (1) seals tightly against the bottom of the evaporating cylinder (2) through the lower intermediate stage seal (17), separating the heating space of the middle stage (16) of the lower stage heating space (18). 2. Evaporating cylinder of a three-stage short-path evaporator according to claim 1, characterized in that the upper intermediate partition (3j is hermetically connected to the central heating tube (8), the central filling tube (10), the lower heating tube (11) and the solute a filler tube (12), while the lower-grade baffle (1) is hermetically connected to the lower heating tube (11) and an optional filling tube (12).