RU10107U1 - FILM EVAPORATOR - Google Patents

Description

FAN EVAPORATOR

The invention relates to film machines intended for carrying out heat transfer processes in the oil refining, chemical, food, metallurgical and other industries.

Known film evaporator, I62I994 V01D1 / 22.1991g. BI j 3. containing a pressure chamber, a distribution disk with holes and hollow film formers with flanging in the lower part, with calibrated holes, bushings installed in the evaporation pipes, fixed in the tube sheets and passing through the holes in the distribution disk.

The disadvantage of this invention is the need to maintain a controlled pressure in the pressure chamber for

ensure the operability of the apparatus. Otherwise, a thin film of liquid can drip along the pipe walls and break into the stream, which sharply reduces the evaporation surface and reduces the efficiency of the evaporator.

Known film evaporator, and.with. I4978I9 cl. V01D 1/22, 1994 BI 23 (prototype) containing a vertical 1p l | NL1ICH SL

KIY casing, upper, lower and intermediate tube boards, flexible heat transfer tubes | passing with a gap through the holes in the intermediate tube plate, liquid distributors installed in the gap, nozzles for the inlet and outlet of the solution, heating, secondary steam and condensate, film formers made in the form of radial ribs on the side surface of which there are bevels converging on their lower coats and the ribs are made on the inner surface of the holes in the intermediate tube plate.

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- 2 The disadvantage of this evaporation apparatus is that it is impossible to obtain uniform irrigation of pipes throughout the entire cross section of the apparatus due to their non-linear linearity over the entire dyne on the used flexible polymer heat-exchange pipes. In addition, the disadvantage is the inefficient use of heat from the treated liquid, since installed above the upper tube sheet and its preheating in the lower end cap does not occur.

The technical effect of the invention is to increase the efficiency of the film evaporator.

The indicated technical effect is achieved by the fact that in a film evaporator containing a vertical cylindrical body, end caps, upper and lower tube boards, tubing tubes, film former installed with a gap inside the upper ends of the heat transfer tubes, a nozzle for the input and output of the processed liquid, heating, secondary steam and condensate, according to the invention, an additional pipeline is introduced into the device, made, for example, in the form of a coil placed in the lower.% st. Tso | d U45a1, one end of which is connected to the input pipe of the processed fluid, and the other, a straight section of the pipeline, is fixed between the pipe boards, while the pipe input of the processed liquid is installed in

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bottom of the evaporator.

In Fig, 1 shows the proposed film evaporator, General view; in Fig.2 - node I in Fig.1; on - section aa in fig. 2

The film evaporator contains a cylindrical housing I, upper 2 and lower 3 end caps, upper 4 and lower 5 tube boards, heat transfer tubes 6, film former 7 s

radial ribs 9, forming a gap 8 with heat exchange tubes 6, the input fitting 10, the fitting II of the input of the processed fluid, the fitting. 12 inlet, heating steam outlet 13, secondary steam outlet 14, condensate outlet 15, conduit 16 made in the form of a coil having an upper straight section 17.

The film evaporator operates as follows: Through the nozzle 12, heating steam is supplied to the housing I, which partially condenses on the outer surfaces of the heat exchange tubes 6, giving them heat, and the condensate is discharged through the nozzle 15. The exhaust steam is discharged through the nozzle 13, The processed liquid is supplied into the evaporator through the nozzle 10 and then through the pipe 16, immersed in the treated liquid and heated by it, enters through a straight section 17 into the chamber formed by the cover 2 and the pipe board 4, forming on this board with loy, whose hydraulic pressure ensures a uniform flow of fluid through each heat exchange tube 6. Passing through the annular gap 8 formed by the film former 7 with its radial ribs 9 and heat transfer tubes 6, the liquid forms a continuous film flowing down on their inner surface. As the film moves down the surface of the pipes, water evaporates. Secondary steam is removed through the nozzle 14, and one stripped off the liquid flows from the lower ends of the tubes and enters the chamber formed by the bottom cover 3 and the tube plate 5, from where it is discharged through the nozzle II,

Claims (1)

A film evaporator containing a vertical cylindrical body, end caps, upper and lower tube boards, heat transfer tubes, film formers installed with a gap inside the upper ends of the heat transfer tubes, a nozzle for input and output of the processed fluid, heating, secondary steam and condenser, characterized in that the device additionally introduced a pipeline, made, for example, in the form of a coil, placed in the lower part of the housing, one end of which is connected to the inlet of the processed fluid, and the other , a straight section of the pipeline, fixed between the pipe boards, while the fitting of the input of the processed fluid is installed in the bottom cover of the evaporator.