CN210718772U

CN210718772U - Double-flow double-shell-pass full-countercurrent heat exchanger

Info

Publication number: CN210718772U
Application number: CN201921352902.6U
Authority: CN
Inventors: 吴金星; 赵克林; 李雪
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-06-09
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a double strand flow double shell side full countercurrent flow heat exchanger mainly includes casing, heat exchange tube, half bow-shaped baffling board, tube sheet, pipe case, tube side branch journey baffle, shell side fluid import and export takeover, first strand tube side fluid import and export takeover and second strand tube side fluid import and export takeover, its characterized in that: a shell pass partition plate is arranged in the shell and is vertically welded with the tube plate at one end, keeps a certain distance with the tube plate at the other end and keeps sealing with the shell; tube pass partition plates are arranged in the tube boxes at two ends to divide the tube boxes and the heat exchange tube bundles into a first tube pass and a second tube pass, and each tube box is provided with a tube pass fluid inlet-outlet connecting tube; the shell pass partition plate and the tube pass partition plate are in the same plane. The utility model discloses a two shell sides of shell side fluid flow, realize complete countercurrent flow heat with two strands of tube side fluids to the whole heat exchange efficiency of heat exchanger has been improved.

Description

Double-flow double-shell-pass full-countercurrent heat exchanger

Technical Field

The utility model relates to a heat exchanger technical field especially relates to a double-strand flow double-shell side full-counterflow heat exchanger.

Background

The heat exchanger is an important industrial device for realizing heat transfer of cold and hot fluids, and is applied to various process industrial fields. The common heat exchanger generally only has two fluids to exchange heat, if three or more fluids exchange heat simultaneously, a plurality of heat exchangers are required to be connected in series or in parallel, so that the equipment investment is greatly increased, the power consumption and the heat loss are correspondingly increased, and the occupied area of the equipment is also increased.

Patent CN206724759U discloses a multi-strand heat exchanger, which comprises a cylinder, a plurality of heat exchange tubes arranged in the cylinder, an inlet tube, an outlet tube, a liquid inlet chamber, a liquid outlet chamber and a partition plate. This patent is through setting up the baffle in feed liquor room and play liquid room, divide into a plurality of cavities of mutually independent with feed liquor room and play liquid room, and a plurality of cavities correspond the heat exchange tube of the same quantity, let in different media, reach the effect that carries out the heat transfer with the fluid in the barrel inner chamber simultaneously. According to the technical scheme, the heat exchanger is a single shell pass, two tube pass fluids exchange heat with one shell pass fluid at the same time, so that the total heat transfer temperature difference is reduced, and the two tube pass fluids cannot exchange heat with the shell pass fluid fully.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a double-strand flow double-shell pass full-countercurrent heat exchanger.

The utility model adopts the technical proposal that: the utility model provides a full adverse current heat exchanger of double shell side of double current, mainly includes casing, heat exchange tube, half bow-shaped baffling board, tube sheet, pipe case, tube side partition board, shell side fluid import and export takeover, first strand tube side fluid import and export takeover and second strand tube side fluid import and export takeover which characterized in that: a shell pass partition plate is arranged in the shell, is vertically welded with the tube plate at one end, keeps a certain distance with the tube plate at the other end, and simultaneously keeps sealing with the shell, so that the shell is divided into double shell passes; tube pass partition plates are arranged in the tube boxes at two ends, and each tube box is provided with a tube pass fluid inlet-outlet connecting tube, so that the tube box and the heat exchange tube bundle are divided into a first tube pass and a second tube pass; the positions of the second strand of tube pass fluid inlet and outlet connecting tubes on the two end tube boxes are just opposite to the left and right positions of the first strand of tube pass fluid inlet and outlet connecting tubes.

In the first tube pass and the second tube pass, the flow directions of each tube pass fluid and the corresponding shell pass fluid are both countercurrent, the fluid with large temperature difference with the shell pass fluid flows through the first tube pass, and the fluid with small temperature difference with the shell pass fluid flows through the second tube pass.

The number of the heat exchange tubes of the first tube pass and the second tube pass is determined according to the flow and the heat exchange amount of two tube pass fluids, and the corresponding positions of the shell-pass partition plate and the tube-pass partition plate are determined according to the number of tubes of each tube pass, and the shell-pass partition plate and the tube-pass partition plate are both positioned in the same plane.

The shell pass partition plate and the tube pass partition plate are both horizontally arranged or vertically arranged.

Compared with the prior art, the beneficial effects of the utility model are that: firstly, the heat exchanger adopts the shell pass partition plate, so that double-shell pass flow can be realized, the shell pass fluid speed can be improved, the flow time of fluid in the shell pass can be prolonged, and each tube pass fluid and the corresponding shell pass fluid are both in countercurrent, so that the overall heat exchange efficiency of the heat exchanger is improved; and secondly, the tube side fluid with large temperature difference with the shell side fluid flows through a first tube side, and the tube side fluid with small temperature difference with the shell side fluid flows through a second tube side, so that the total heat transfer temperature difference of the heat exchanger is increased, and the sufficient heat exchange between the two tube side fluids and the shell side fluid can be realized.

Drawings

Fig. 1 is a schematic structural diagram of a double-flow double-shell-pass full-countercurrent heat exchanger.

Reference numerals: 1-tube pass partition plate; 2-a first tube side fluid inlet connection tube; 3-housing fluid outlet connection; 4-heat exchange tube; 5-shell pass partition plate; 6-half bow-shaped baffle plate; 7-a pull rod and a distance tube; 8-a shell; 9-the flange tube plate is used as well; 10-a pipe box flange; 11-a first tube side fluid outlet connection; 12-a tube box; 13-a second tube side fluid inlet connection; 14-housing fluid inlet connection; 15-second tube side fluid outlet connection.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

A double-flow double-shell pass full-countercurrent heat exchanger adopts a fixed tube-plate heat exchanger, firstly, a shell pass partition plate and a tube plate at one end are welded and fixed, then, semi-arch-shaped baffle plates are arranged and fixed on two sides of the shell pass partition plate through pull rods and distance tubes, the gaps of the semi-arch-shaped baffle plates are arranged left and right, then, heat exchange tubes penetrate through the tube plate and the semi-arch-shaped baffle plates one by one, then, the whole tube bundle and the semi-arch-shaped baffle plates are arranged in a shell, and the tube plate and the shell are welded; another tube plate is welded and fixed at the other end of the shell, the other end of each heat exchange tube is led into the tube plate one by one, and then the two ends of all the heat exchange tubes are welded and fixed with the corresponding tube plates; and finally, mounting a shell side fluid inlet and outlet connecting pipe and a support to finish the assembly of the whole shell. And then, arranging the tube box pass partition plates into the tube boxes, welding and fixing the tube box pass partition plates, respectively welding tube pass fluid inlet and outlet connection tubes on the tube boxes at two ends, respectively connecting the tube boxes at two ends with the shell through tube box flanges and shell flanges, and enabling the tube box pass partition plates to face partition plate grooves on the tube plates.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a full adverse current heat exchanger of double shell side of double current, mainly includes casing, heat exchange tube, half bow-shaped baffling board, tube sheet, pipe case, tube side partition board, shell side fluid import and export takeover, first strand tube side fluid import and export takeover and second strand tube side fluid import and export takeover which characterized in that: a shell pass partition plate is arranged in the shell, is vertically welded with the tube plate at one end, keeps a certain distance with the tube plate at the other end, and simultaneously keeps sealing with the shell, so that the shell is divided into double shell passes; tube pass partition plates are arranged in the tube boxes at two ends, and each tube box is provided with a tube pass fluid inlet-outlet connecting tube, so that the tube box and the heat exchange tube bundle are divided into a first tube pass and a second tube pass; the positions of the second strand of tube pass fluid inlet and outlet connecting tubes on the two end tube boxes are just opposite to the left and right positions of the first strand of tube pass fluid inlet and outlet connecting tubes.

2. The double-stream double-shell-pass full-countercurrent heat exchanger of claim 1, characterized in that: in the first tube pass and the second tube pass, the flow directions of each tube pass fluid and the corresponding shell pass fluid are both countercurrent, the fluid with large temperature difference with the shell pass fluid flows through the first tube pass, and the fluid with small temperature difference with the shell pass fluid flows through the second tube pass.

3. The double-stream double-shell-pass full-countercurrent heat exchanger of claim 1, characterized in that: the number of the heat exchange tubes of the first tube pass and the second tube pass is determined according to the flow and the heat exchange amount of two tube pass fluids, and the corresponding positions of the shell-pass partition plate and the tube-pass partition plate are determined according to the number of tubes of each tube pass, and the shell-pass partition plate and the tube-pass partition plate are both positioned in the same plane.

4. The double-stream double-shell-pass full-countercurrent heat exchanger of claim 1, characterized in that: the shell pass partition plate and the tube pass partition plate are both horizontally arranged or vertically arranged.