CS241799B1 - Pipe heat exchanger for heating nitrogen from oxygen separator - Google Patents

Abstract

The aim is to solve the heating of nitrogen from an oxygen separation device without the need to use steam or other conventional heat sources. The stated purpose is achieved by arranging bran (2) on an oxygen pressure pipe (1). This pipe (2) is provided with a compensator (5) at one end, a cover (6) at the other end and further with nitrogen inlet and outlet pipes (4, 4'). On the outer surface of the oxygen pressure pipe (1) are alternately attached transverse segments in the shape of intermediate rings.

Description

The invention relates to a pipe heat exchanger for heating nitrogen from an oxygen separator and to the solution of heating this nitrogen without the need for steam or other conventional heat source.

Up to now, the operation of oxygen separators requires periodic heating of some of their parts, for example silica gel filters of the expansion turbine and the like from temperatures up to -190 ° C to plus temperatures. This heating is carried out with dry melting nitrogen, which is heated in a steam heater to a temperature of 80 ° C. The disadvantage of this solution is the necessity to use steam heaters »which is quite expensive and energy intensive.

This disadvantage is overcome by a duct heat exchanger for heating nitrogen from the oxygen separator according to the invention, consisting of an outlet oxygen pressure line, the nature of which is on the oxygen pressure line. a duct provided with a compensator at one end, a lid at the other end, and a nitrogen inlet and outlet ducts », wherein annular cross-sectional segments are alternately mounted on the outer surface of the oxygen pressure duct.

An advantage of the pipe heat exchanger according to the invention is that it is not necessary to use steam heaters for heating nitrogen. It is also an advantage of the simple design of the heat exchanger which allows heat to be removed without dynamic changes of direction or increased resistance to oxygen flow.

The accompanying drawing shows an exemplary embodiment of a pipe exchanger according to the invention in schematic section.

The duct heat exchanger according to the invention consists of an oxygen outlet duct 1, on which a duct 2 is provided, provided at one end with a compensator J to compensate for axial forces and at the other end with a ring-shaped cover 6. From the side, a nitrogen inlet pipe 6 opens at one end and a nitrogen outlet pipe 6 'at the other end. On the outer surface of the oxygen pressure line 1, transverse annulus-shaped segments 6 are alternately attached from one side to the other.

A closed space is provided by the enclosed space between the outer surface of the oxygen pressure line 1 and the inner surface of the line 6 through which dry nitrogen flows through the nitrogen inlet and outlet lines, which is heated from 15 ° C to 85 ° C. The temperature of the compressed oxygen in the oxygen pressure line 8 is 140 ° C. From the nitrogen outlet pipe 6, the heated nitrogen is discharged to a low pressure oxygen separator in which it heats and thus cleans the necessary parts such as silica gel filters and the like. The transverse segments 6 increase the exchange surface of the exchanger.

Claims (1)

Subject A duct heat exchanger for heating nitrogen from an oxygen separator formed by an oxygen outlet duct, characterized in that a duct (2) is provided on the oxygen duct (1), provided with a compensator (3) at one end and a lid (6) at the other end. and further nitrogen inlet and outlet pipes (4, 4 *), transverse segments (5) of the annulus being alternately mounted on the outer surface of the oxygen pressure pipe (1).