SU1409851A1 - Method and apparatus for periodic cleaning of heat exchanger tube internal surfaces - Google Patents

Abstract

The invention improves the efficiency and effectiveness of cleaning. At the VH9D heat exchanger, a gas-liquid stream is mixed with cleaning elements. To reuse the cleaning elements, they are returned to the inlet of the heat exchanger by a part of the total flow of the heat exchanger cooling medium. To create a gas-liquid flow, an ejector suction of atmospheric pressure to the cooling medium is used. The cleaning device includes a re-, circulation of cleaning elements with a chamber for collecting them and a shut-off organ at the exit from it. A catcher of cleaning elements is installed in the discharge conduit. The circulation of the cleaning elements is provided by an ejector, whose inlet is connected to the atmosphere through a pipeline with a valve. The catching element catcher is designed as a turning grid. The locking member is interlocked with a valve on the atmospheric pipeline of the ejector and with a catcher of cleaning elements. 2 sec. and 1 z. p. f-ly, 2 ill. with (L

Description

4 D CO

The invention relates to a power system, in particular to systems for ball cleaning of condensers and other tubular heat exchangers cooled by natural waters.

The purpose of the invention is to increase the efficiency and effectiveness of cleaning.

FIG. Figures 1 and 2 depict a device for cleaning in two positions during the work load.

In the condenser 1, between the water chambers 2, tubes 3 are placed. The pressure circulating conduit 4 is intended for supplying cooling water to the pipes, and the discharge conduit 5 for discharging water. The ball-shaped net 6 is designed to trap the cleaning elements — elastic balls 7. The water-jet ejector 8 is intended to supply the caught balls to the chamber 9 for collection. The automatic valve 10 interconnected in the pipeline 11 and the auto-magical stop organ 12 are designed to simultaneously supply balls and air to the quenched water, the pump 13 is designed to supply working water to the water ejector,

The cleaning device works i as follows

In the initial position, the balls 7 should be assembled in the chamber 9, and the ball catching grid should be in a position parallel to the moving water flow. Before launching the balls I, the pump 13 is turned on, and the grid 6 is set to the working position, the signal is not given to the opening of the blocked i automatic valve 10 and the locking member 12. Under the pressure of the water mixture from the ejector 8, the balls 7; from the loading chamber 9 are discharged with the air into the circulation conduit 4 and further into the water in chamber 2. The charts and air bubbles are evenly distributed through the tubes and clean them by moving in the water flow. After all the balls and the specified amount of air are ejected the valve 10 and the locking member 12 are closed again, and the balls are caught by the net 6 and returned to the chamber 9. After

As all the balls come together in chamber 9 ,. the cycle repeats.

Claims (3)

1. The method of periodic cleaning the inner surface of the heat exchanger tubes, mainly condensation-. steam turbines by supplying the heat exchanger with a gas-liquid flow in the mixture with cleaning elements and returning the cleaning elements for reuse, characterized in that, in order to increase the efficiency and effectiveness of cleaning, the return of the cleaning elements for reuse is part of the total flow cooling medium heat five 0 five five 0 A manic ejector, and to create a gas-liquid flow, ejector suction of atmospheric air to the cooling medium is used. 2. Method POP1, characterized in that elastic balls are used as cleaning elements. 3. A device for periodically cleaning the internal surface-Lg of heat exchanger tubes, mainly steam turbine condensers, containing a recirculation line of cleaning elements with a chamber for collecting them and a shut-off body at the outlet of it, a catcher of cleaning elements installed in the discharge conduit, and ensuring their circulation, characterized in that, in order to increase the cost-effectiveness and efficiency of cleaning, the means for ensuring the circulation of the cleaning elements is made in the form of an ejector, the receiving pipe of which A pipeline with a valve is connected to the atmosphere, and the catcher of the cleaning elements is rotatable to block the cross section of the outlet conduit, while the stop valve at the outlet of the cleaning chamber of the cleaning elements is interlocked with the valve on the atmospheric pipeline of the ejector and the catcher of the cleaning elements.