Air cooling unit of abc gi sectional type with cylindrical displacers

FIELD: power industry.

SUBSTANCE: air cooling unit of ABC GI sectional type with cylindrical displacers consists of steam supply header, several rows of inclined or vertical heat exchange tubes, condensate collection header and cylindrical displacers.

EFFECT: fundamental improvement of the design of sectional unit with air cooling due to improved efficiency of the surface use.

 

The invention relates to the field of energy and can be used in chemical, metallurgical and gas industry.

Known air cooler section type (air blowing cooler), consisting of heat exchangers with multiple rows of horizontal finned tubes and immediately above them or below them blow fans, providing duct cooling air through the heat exchange surface (see nomenclature of chemical engineering plant, Borisoglebsk, the apparatus BM technical specifications 3612-009-00218880-2005).

The main disadvantage of these devices by condensation of steam inside the tubes is unsatisfactory condensate and the danger of thawing pipes.

Known sectional heat exchangers air cooled with vapor condensation inside a vertical or inclined pipes the air condensing unit (air blowing cooler gas-vapor internal ABC GI cm. patent # 92160 air cooler section type ABC GI, Elm, Waheguru).

The main drawback of these units is the need to install in different rows of tubes plungers of various lengths, which creates technological difficulties and can be a cause of reduced reliability and efficiency of the apparatus. Low speed condensing steam in the pipe, where there are no vychislitel is, reduce the intensity of heat transfer.

Overcoming these shortcomings is possible if the set of cylindrical plungers of different diameters but of the same length in all the rows of heat exchange tubes, except the first in the direction of the cooling air.

Construction of the sectional apparatus of this type is shown in figure 1. It consists of a header steam supply 1, several rows of inclined or vertical heat exchanger tubes 2, a collector for collecting condensate 3 and cylindrical plungers 4.

The apparatus operates as follows. Steam enters the steam supply manifold 1 and diverges for heat transfer pipes 2. In those heat exchange tubes, which has a cylindrical plungers, hydraulic resistance coefficient larger than the first heat transfer pipe, the diameter of cylindrical plungers increases in each of the next row of heat exchange tubes in the direction of the cooling air, and the length of the cylindrical plungers equal to the length of heat exchanger tubes. Thus there will be a redistribution of steam compared to the device without cylindrical plungers: all the tubes, except the first, will be less steam, and in the first movement of the air heat exchanging pipe will go more steam, and it will condense the steam along the entire length. When this setting cyl is Harikesa the plungers of different diameter increases the velocity of the steam throughout the length of the tubes, accordingly increases the heat transfer coefficient and increases the efficiency of heat transfer surface.

This decision fundamentally improves the design of the sectional unit with air cooling by increasing the efficiency of use of the surface.

Air cooler section type ABC GI cylindrical plungers consisting of collector steam supply, a collector for collecting condensate, several rows of inclined or vertical heat exchange tubes, and in all the rows of heat exchange tubes, except the first in the direction of the cooling air installed cylindrical plungers, characterized in that the length of the cylindrical plungers equal to the length of heat exchange tubes, and the diameter of the cylindrical plungers increases in each of the next row of heat exchange tubes in the direction of the cooling air.



 

Same patents:

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EFFECT: enhanced efficiency.

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