SU582795A1 - Evaporator - Google Patents

Description

(54) STEAM DEVICE

The residue was discharged into the form of a vertical cylindrical body 1 with a heating surface consisting of two vertical heating chambers 2, 3 installed one above the other. The heating surface of the lower heating chamber 3 is made of pipes 4 of a smaller diameter, and the upper chamber 2 of pipes 5 of a larger diameter. Between the tube grids 6 sections, a chamber 7 is made, which is connected to the downward circulation pipes 8 through regulating devices 9. The pipes of the lower and upper sections are arranged coaxially. at the same time, pipes of smaller diameter enter pipes of larger diameter (Fig. 2), forming a channel, which expands stepwise as the volume of the vapor-liquid flow increases. To supply steam to the heating surface, serve Shtucer 10, and to drain condensate from Shtucer 1L Fitting 12 and 13. They are designed, respectively, to supply and discharge evaporated solution. Non-condensable gases are removed from the upper points of the heating chambers 14 by means of tubes 14.

The device works as follows.

The liquid to be evaporated is fed through fittings 12 into the subtubular space of the lower heating chamber 3. In the pipes 4 of the lower heating chamber 3, the liquid is heated and boils. Next is the increase in the velocity of the vapor-liquid mixture. When the flow enters the pipes 5 of the upper heating chamber 2, this speed initially decreases and then increases again along the length of the pipe. The condensed liquid is discharged through fittings 13. The regulating devices 9 allow adjusting the water content in the pipes of the upper heating chamber, as well as the speed and height of the boiling point

in (the heating chamber, and thereby establish the necessary ratios between the non-pumping and boiling sections along the height of the heating chamber to obtain maximum average heat transfer coefficients from the pipe wall to the liquid under given operating conditions of the apparatus.

The proposed evaporation device em

to significantly increase the efficiency of the used heating surface, reduce the deposition of scale and increase the unit capacity

devices.

Claims (3)

Invention Formula An evaporator with remote circulation pipes, comprising a housing and chambers with vernichnye pipes located one above the other, which is heated above it, is fixed. In the tube sheets, between which an intermediate liquid chamber is formed, characterized in that, in order to intensify the heat exchange process, the pipes of the lower heating chamber are made of a smaller diameter than the pipes of the upper heating chamber, and are inserted coaxially in them, forming an annular gap, and the intermediate chamber connected to external circulation pipes. Source of information received in the course of expert information; I. USSR Copyright Certificate No. 128850,, cl. B 01 D 1/06, I960. 2. US Patent No. 2334959, cl. 159-13, 1960. 3. German patent number 244559, cl. 12a, 2, 1912.