RU15392U1 - SHELL-TUBE HEAT EXCHANGER - Google Patents

Abstract

1. Shell-and-tube heat exchanger for gas or liquid media, consisting of a housing, a tube bundle, chambers with tube plates and nozzles for supplying and discharging a coolant, characterized in that flat and wavy spacer plates are installed in series between adjacent rows. The shell-and-tube heat exchanger according to claim 1, characterized in that the flat and wavy spacer plates in adjacent rows are offset along the pipes relative to each other.

Description

SHELL-TUBE HEAT EXCHANGER

The utility model relates to the field of heat exchangers and can be used as a heater or cooler for gas and liquid media in industrial energy, chemical, food and other industries.

Known shell-and-tube apparatus with the flow of gas and liquid media in the annulus. These devices, as a rule, are made with a single or multi-way cross-flow of media (see the Handbook of heat exchangers, vol. 1.- edited by Petukhov P.S., Shishkova V.K.- M .: Energoatomizdat, 1987, p. . 8-9). The main disadvantage of these devices is a decrease in the average temperature head due to the cross-flow of the coolant and the risk of self-oscillation of the pipes during transverse washing with a flow of liquid and gas.

Known shell-and-tube heat exchanger (Decision on the grant of the RF Patent for the invention No. 96122440/06 (029046) dated 01/25/2000), consisting of a tube bundle body, chambers with tube plates and pipes for supplying and discharging coolants, where flat spacing plates are installed between adjacent rows of pipes . The disadvantage of this device is that during transverse flow around the tube bundle with the coolant, mechanical vibrations of the tubes can occur in the direction perpendicular to the velocity vector of the incoming flow.

The purpose of the utility model is to increase the efficiency and reliability of shell and tube heat exchangers with a transverse medium flow in the annulus.

The essence of the utility model is that successively flat and wavy plates are installed in the annulus, the thickness of which ensures the distance of the pipes in adjacent rows. The flow of liquid or gas flowing both across and along the pipes flows around these plates with insignificant hydraulic

losses. This makes it possible to provide both a pure counterflow and a cross circuit of the heat transfer medium, which increases the efficiency of the heat exchanger. Fixing by the plates of pipes ensures the absence of self-oscillations and thereby increases the reliability of the heat exchanger.

As a result of this significant feature, the shell-and-tube heat exchanger acquires a new property: the possibility of implementing both highly efficient countercurrent and cross-flow patterns of heat transfer fluids with moderate hydraulic resistance and increased reliability, which is determined by the absence of pipe oscillations for heat exchangers of any pipe length.

The shell-and-tube heat exchanger diagram is shown in the figure.

It consists of a housing 1 with chambers and tube boards 2. nozzles for supplying coolants 3,4,5,6, tube 7, between the tubes sequentially flat and wavy spacing plates 8.9. In adjacent rows of pipes, plates can be mixed along the pipe relative to each other.

The heat exchanger operates as follows. One of the coolants flows through the pipe 3 into the chamber 6 and flows inside the pipes 7.

The second heat carrier through the pipe 6 enters the annulus and flows both along and across the pipes. At the same time, it flows around the spacers 8.9, which have a small thickness and do not have a noticeable hydraulic resistance. Hydraulic losses will even decrease if in adjacent rows the plates are offset along the pipes relative to each other. The presence of distance plates 8.9 fixes the tubes at intermediate points between the tube plates, which ensures the absence of self-oscillations that lead to the destruction of the tube bundle.

Thanks to the use of the above-mentioned consultancy 1X) solutions, highly efficient and reliable operation of the shell-and-tube heat exchanger is ensured.

20 112. I 2

Claims (2)

1. Shell-and-tube heat exchanger for gas or liquid media, consisting of a housing, a tube bundle, chambers with tube plates and pipes for supplying and discharging a heat transfer medium, characterized in that flat and wavy spacing plates are installed in series between adjacent rows. 2. The shell-and-tube heat exchanger according to claim 1, characterized in that the flat and wavy spacing plates in adjacent rows are offset along the pipes relative to each other.