SU1007693A1 - Heating chamber for vertical evaporation apparatus - Google Patents

Abstract

HEATING CAMERA FOR A VERTICAL DRIVEN EQUIPMENT, contains a case with nozzles for supplying steam and condensate, inside which there is a vertical tube bundle, stirring, inside the latter, a partition forming a cavity with an independent condensate outlet, characterized in that increase the efficiency of cleaning the condensate, the partition is made flat, and the surface of the tube bundle located in the cavity is 15-20 / o sheath, the surface of the tube bundle.

Description

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The invention relates to heating chambers for vertical evaporators and heat exchangers and can be used in chemical industry, in particular for evaporation of various solutions using evaporators for heating solutions of secondary vapors.

A known heating chamber for vertical evaporators and heat exchangers, comprising a shell made in the form of a shell that encloses a bundle of pipes fixed in two tube sheets. In the upper part of the chamber there are nozzles for steam supply and removal of uncondensed gases, and in the lower part of the chamber there is a condensate outlet nozzle 1.

Also known is a heating chamber for an evaporator, comprising a housing with nozzles for supplying steam and condensate, inside which there is a vertical tube bundle placed inside the latter, a partition forming a cavity with autonomous condensate drain 2.

The disadvantage of this heating chamber is the low efficiency of condensate cleaning.

The purpose of the invention is to increase the efficiency of condensate treatment.

The goal is achieved by the fact that in a heating chamber containing a housing with nozzles, steam supply and removal of a condensate, inside which there is a vertical tube bundle placed inside the latter, a partition forming the cavity with an autonomous condensate drainage, the partition is flat and the surface of the tube bundle located in the cavity, accounts for 15-20% of the total surface of the tube bundle.

Constructive execution of the heating chamber allows the condensation process to be conducted in two stages. At the first stage of condensation, which occurs in the cavity formed by a partition with the chamber body, along with vapor condensation, it is also cleaned from liquid droplets (solution).

The cleaning process mechanism is as follows. Large droplets of liquid are deposited on the walls of the pipes, and small drops are enlarged due to condensation of secondary vapor on them and are also deposited on the surface of the pipes. Consequently, at the first stage, along with partial condensation of steam, it is purified from the bulk of impurities.

(drops of liquid). The condensing part of the second stage (in the rest of the chamber) part of the steam contains an insignificant amount of impurities, which makes it possible to obtain pure condensate discharged from the chamber through the condensate discharge nozzle. FIG. 1 shows a heating chamber, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The heating chamber contains body 1,

the upper and lower tube sheets 2 and 3, respectively, in which the vertical tube bundle 4 is fixed. In the annular space there is a flat partition 5 attached to the lower tube plate 3. The partition 5 forms with the body 1 a cavity 6 equipped with a branch pipe 7 for autonomous condensate drainage. The surface of the tube bundle 4, located in the cavity 6, constitutes 15-20% of the total surface of the tube bundle 4. On housing 1

a steam inlet pipe 8, a non-condensable gas outlet pipe 9 and a condensate outlet pipe 10 are installed.

The camera works as follows. Through the pipe 8 for supplying steam into the cavity 6 serves secondary steam containing

5 drops of liquid. The heat from the coolant circulating through the tube bundle 4 is partially condensed and cleaned of liquid droplets. Condensate containing impurities salts, flows through the pipe part of the tube bundle 4, located

0 in the cavity b, and is discharged through the nozzle 7 of the autonomous condensate drain. The amount of condensate contaminated with impurities is 15–20% of the total. Then partially cleaned steam, skirting a flat partition 5, enters the annular

5, the space of the tube bundle 4 of the heating chamber, where it is fully condensed. Pure condensate is discharged through the condensate drain pipe 10, and non-condensable gases are discharged through the drain pipe 9

Non-condensable gases. The amount of pure condensate is 85-80% of the total amount of condensate. The salt content of the pure condensate obtained in the heating chamber from secondary vapors is 15-20 mg / l.

5 Such an embodiment of the heating chamber will ensure efficient cleaning of the secondary steam entering the chamber, which makes it possible to obtain 80-85% of pure condensate for further use.

Claims (1)

A HEATING CAMERA FOR A VERTICAL EVAPORATOR, containing a housing with steam supply and condensate drain pipes, inside which a vertical tube bundle is installed, placed inside the last partition, forming a cavity with an autonomous condensate drain, characterized in that, in order to increase the efficiency of condensate cleaning, the partition is made flat, and the surface of the tube bundle located in the cavity is 15-20% of the total surface of the tube bundle.