SU1589026A1 - Double-pipe heat-exchanger - Google Patents

Abstract

The invention relates to heat exchangers and can be used to intensify heat exchange and increase operational reliability when processing viscous products in oil production techniques. The tube-in-tube heat exchanger contains concentrically arranged inner 1, intermediate 2 and outer 3 pipes and spiral insert 4 (CB) placed in the gap between pipes 1 and 2. CB 4 is made in the form of a wire made of an elastic material whose diameter is 0.1-0.2 outer diameter of the pipe 1, and the step CB 4 - 4-6 diameter of the wire. The CB 4 is installed in contact with the surface of the pipe 1 with the possibility of axial and lateral movement under the action of flow and with a gap relative to the surface of the pipe 2, which is 0.2-0.5 of the wire diameter. Pipes 1-3 have connections 5-7 and 8-10, respectively, for the supply and removal of heat exchanging streams. BC 4 is located between partitions 11 having openings 12 for the passage of a stream. With the passage of hot flow through pipes 1 and 3, and cold (viscous) through pipes 2 by making CB 4 of wire placed with the possibility of axial and transverse movements, the flow of the heated flow occurs in the turbulent mode, and the wire vibrates at This ensures intensive mixing of the viscous flow. 3 il.

Description

GO O

1

The invention relates to heat exchanging devices, namely to heat exchangers of the type "pipe in pipe", and can be used in oil production techniques.

The purpose of the invention is to intensify heat transfer and increase operational reliability when processing viscous products.

FIG. 1 shows a heat exchanger of the type “pipe in pipe, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a section of Bi-B in FIG. one.

: A heat exchanger of the “pipe in pipe” type is concentrically located inside the inner 1, intermediate 2 and outer 3 and spiral insert 4 placed in the gap between the inner 1 and intermediate 2 pipes. The insert 4 is made in the form of a wire made of an elastic material, the diameter of which is 0.1-0.2 of the outer diameter of the inner tube 1, and the pin of the insert 4 is 4.0-6.0 diameter of the wire. The insert 4 is installed in contact with the surface of the morning pipe 1 with the possibility of axial and transverse movement under the action of the flow and with a gap relative to the surface of the intermediate pipe 2, it is 0.2-0.5 times the diameter of the wire. Pipes 1–3 have pipes 5–7 and 8–10, respectively, for the supply and removal of heat exchange fluxes. The insert 4 is located between the partitions 11 having openings 12 dL of the flow passage.

The heat exchanger of the type “pipe in pipe” works as follows.

One stream (hot coolant) is fed through pipes 5 and 7 into the outer 3 and inner pipe 1 and out through pipes 8 and 10. Another stream (cold coolant is a viscous medium, such as oil) is fed through pipe 6 into the intermediate pipe 2, through the holes 12 partitions 11

Aa

FIG. 2

enters the gap between pipes 1 and 2, washes the insert 4 and at the other end through the openings 12 of the partition 11 and the pipe 9 leaves the pipe 2. By performing a helical insert 4 of wire placed with the possibility of axial and lateral movement, the movement of the heated - flow occurs in the turbulent mode, and the wire, while vibrating, provides intensive mixing of the viscous flow. Making a wire with a diameter of 0.1-0.2 of the outer diameter of the inner tube 1, placing the insert 4 with a clamp of 4.0-6.0 and a gap of 0.2-0.5 of the diameter of the wire, ensures optimal conditions for heat exchange.

In this way, heat transfer is intensified and operational reliability is increased when processing viscous products.

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Claims (1)

Invention Formula five A heat exchanger of the type "tube in tube" containing concentrically arranged inner, intermediate and outer tubes and a helical insert placed in the gap between the inner and intermediate tubes, characterized in that, in order to intensify heat exchange and increase operational reliability when processing viscous products, the insert is made as 0 elastic wire, the diameter of which is 0.1-0.2 of the outer diameter of the inner tube, and the insertion pin is 4-6 times the diameter of the wire installed in contact with the surface of the inner tube with the possibility of axial and transverse 5 under the action of flow and with a gap relative to the surface of the intermediate pipe, which is 0.2-0.5 times the diameter of the wire. 5-5 Fig.}