CN212806654U

CN212806654U - Novel heat exchanger

Info

Publication number: CN212806654U
Application number: CN202021546023.XU
Authority: CN
Inventors: 杜玉锋
Original assignee: Dalian Kunbo Machinery Equipment Co ltd
Current assignee: Dalian Kunbo Machinery Equipment Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-03-26
Anticipated expiration: 2030-07-29

Abstract

The utility model relates to the technical field of waste heat utilization equipment, in particular to a novel heat exchanger, which comprises a heat exchanger main body and a preheating box, wherein the heat exchanger main body comprises a shell, a U-shaped heat exchange tube, a baffle plate, a tube plate and a tube box, and the tube box is provided with an air inlet interface and an air outlet interface which are respectively communicated with an air inlet cavity and an air outlet cavity; the preheating box is arranged below the heat exchanger main body, a coil is transversely arranged inside the preheating box, one end of the coil penetrates out of the preheating box and is connected with the air outlet interface through a pipeline, and the other end of the coil penetrates out of the preheating box and is connected with a smoke exhaust pipe. The liquid in the preheating box is preheated by the flue gas flowing through the U-shaped heat exchange tube, the temperature of the liquid entering the shell is increased, the temperature difference inside and outside the U-shaped heat exchange tube is reduced, the U-shaped heat exchange tube is prevented from generating large thermal stress to cause bending fracture, and the heat in the flue gas can be fully utilized.

Description

Novel heat exchanger

Technical Field

The utility model relates to a waste heat utilization equipment technical field, concretely relates to novel heat exchanger.

Background

The shell-and-tube heat exchanger is composed of a shell, a heat transfer tube bundle, a tube plate, a baffle plate (baffle plate), a tube box and the like. The shell is mostly cylindrical, a tube bundle is arranged in the shell, and two ends of the tube bundle are fixed on the tube plate. One of the cold fluid and the hot fluid which carry out heat exchange flows in the tube and is called tube pass fluid; the other flows outside the tubes and is called shell-side fluid. To increase the heat transfer coefficient of the fluid outside the tubes, baffles are typically installed in the shell to increase the velocity of the shell-side fluid, forcing the fluid to traverse the tube bundle multiple times over a given path, and increasing the degree of fluid turbulence.

The existing heat exchanger is usually connected on the flue gas pipeline in series, the temperature of the flue gas discharged from the industrial furnace kiln is as high as eight nine hundred degrees, the shell-and-tube heat exchanger has different temperatures of the shell and the tube bundle due to different temperatures of fluids inside and outside the tube, if the temperatures of the shell and the tube bundle are greatly different, great thermal stress is generated in the heat exchanger, and the tube is bent, broken or pulled off from the tube plate. And the temperature of the flue gas flowing through the heat exchanger is about two hundred degrees, so that the heat in the flue gas is directly filtered and discharged, and the resource is wasted.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the above-mentioned problem that exists, designed a novel heat exchanger, this heat exchanger utilizes the flue gas behind the U type heat exchange tube of flowing through to preheat the liquid in the preheating cabinet, improves the liquid temperature that gets into in the casing, reduces the inside and outside difference in temperature of U type heat exchange tube, avoids U type heat exchange tube to produce great thermal stress and leads to bending fracture, can carry out make full use of to the heat in the flue gas again.

In order to realize the technical purpose, reach above-mentioned technological effect, the utility model discloses a realize through following technical scheme:

a novel heat exchanger comprises a heat exchanger main body and a preheating box, wherein the heat exchanger main body comprises a shell, a U-shaped heat exchange tube, a baffle plate, a tube plate and a tube box, one end of the shell is closed, and the other end of the shell is open; the U-shaped heat exchange tubes are positioned in the shell, a plurality of U-shaped heat exchange tubes are arranged, two ends of each U-shaped heat exchange tube penetrate through the tube plate and are respectively communicated with the air inlet cavity and the air outlet cavity, the upper end and the lower end of the shell are respectively provided with a shell pass outlet and a shell pass inlet, the baffle plate is fixed in the shell between the shell pass inlet and the shell pass outlet, and the positions of the baffle plate, which correspond to the U-shaped heat exchange tubes, are provided with through holes for the U-shaped heat;

the preheating box is located below the heat exchanger main body, a coil is transversely arranged in the preheating box, one end of the coil penetrates out of the preheating box and is connected with an air outlet interface through a pipeline, the other end of the coil penetrates out of the preheating box and is connected with a smoke exhaust pipe, a liquid outlet is formed in the upper end of the preheating box and is connected with a shell pass inlet in the shell, and a liquid inlet is formed in the lower end of the preheating box.

Further, the shell is connected with the tube plate through flanges, and the tube plate is connected with the tube box through flanges.

The utility model has the advantages that:

the heat exchanger preheats the liquid in the preheating tank by using the flue gas flowing through the U-shaped heat exchange tube, so that not only can the heat in the flue gas be fully utilized and the resource waste be avoided, but also the temperature of the liquid entering the shell can be increased, the temperature difference between the inside and the outside of the U-shaped heat exchange tube in the shell is reduced, and the U-shaped heat exchange tube is prevented from generating larger thermal stress to cause bending fracture;

the heat exchanger main part and the preheating cabinet are arranged from top to bottom, so that the heat exchanger is compact in structure, the occupied area is reduced, meanwhile, the shell pass outlet and the shell pass inlet are respectively arranged at the upper end and the lower end of the shell, the liquid outlet and the liquid inlet are respectively arranged at the upper end and the lower end of the preheating cabinet, so that liquid flows from bottom to top, the flowing speed of the liquid is reduced, the contact time of the liquid and flue gas is prolonged, and the liquid and the flue gas can be fully subjected to heat exchange.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

the method comprises the following steps of 1-shell, 11-shell pass inlet, 12-shell pass outlet, 2-tube plate, 3-baffle plate, 4-tube box, 41-partition plate, 42-air inlet interface, 43-air outlet interface, 5-U-shaped heat exchange tube, 6-preheating box, 61-liquid inlet, 62-liquid outlet, 7-coil pipe and 8-smoke exhaust pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, a novel heat exchanger, including heat exchanger main part and preheating cabinet 6, the heat exchanger main part includes casing 1, U type heat exchange tube 5, baffling board 3, tube sheet 2 and pipe case 4, and the one end opening is sealed to casing 1 one end, and tube sheet 2 fixes on the opening of casing 1, and pipe case 4 is fixed in the tube sheet 2 outside, wherein all through flange joint between casing 1 and the tube sheet 2 and between tube sheet 2 and the pipe case 4, and flange joint dismantles the convenience, is convenient for overhaul 1 inside of casing. The inside of the pipe box 4 is divided into an air inlet cavity and an air outlet cavity which are mutually independent by a partition plate 41, an air inlet interface 42 and an air outlet interface 43 which are respectively communicated with the air inlet cavity and the air outlet cavity are arranged on the pipe box 4, and a flange is fixed on the air inlet interface 42 so as to facilitate the connection of the air inlet interface 42 and a flue gas pipeline; the U-shaped heat exchange tubes 5 are located inside the shell, the U-shaped heat exchange tubes 5 are multiple, two ends of each U-shaped heat exchange tube 5 penetrate through the tube plate 2 to be communicated with the air inlet cavity and the air outlet cavity respectively, the shell side outlet 12 and the shell side inlet 11 are formed in the upper end and the lower end of the shell 1 respectively, the baffle plate 3 is fixed inside the shell 1 between the shell side inlet 11 and the shell side outlet 12, and through holes for the U-shaped heat exchange tubes 5 to penetrate through are formed in the positions, corresponding to the U-shaped heat exchange tubes 5, of the baffle plate.

The preheating box 6 is located below the heat exchanger main body, a coil 7 is transversely arranged inside the preheating box 6, one end of the coil 7 penetrates out of the preheating box 6 and is connected with an air outlet interface 43 through a pipeline, the other end of the coil 7 penetrates out of the preheating box 6 and is connected with a smoke exhaust pipe 8, the smoke exhaust pipe 8 is connected with subsequent filtration equipment for sulfur removal, dust removal and the like according to the smoke condition, a liquid outlet 62 is formed in the upper end of the preheating box 6, the liquid outlet 62 is connected with a shell pass inlet 11 on the shell 1, a liquid inlet 61 is formed in the lower end of the preheating box 6, and liquid to be heated is pumped into the preheating box.

When the device works, the flowing direction of liquid is as follows: the liquid to be heated enters the preheating box 6 through the liquid inlet 61, enters the shell 1 from the liquid outlet 62 at the upper end of the preheating box 6 and the shell side inlet 11 at the lower end of the shell 1 after being preheated by the flue gas in the coil 7, and flows out from the shell side outlet 12 at the upper end of the shell 1 after being heated by the U-shaped heat exchange tube 5.

The flow direction of the flue gas is as follows: high-temperature flue gas discharged from the industrial furnace pit enters the air inlet cavity through the air inlet connector 42, then enters the U-shaped heat exchange tube 5 from one end of the U-shaped heat exchange tube 5, heats liquid in the shell 1, flows into the air outlet cavity from the other end of the U-shaped heat exchange tube 5, flows into the coil 7 in the preheating box 6 through the air outlet connector 43 and a pipeline, preheats the liquid in the preheating box 6, and then is discharged from the smoke exhaust pipe 8 at the other end of the coil 7.

This heat exchanger utilizes the flue gas behind the U type heat exchange tube 5 of flowing through to preheat the liquid in the preheating tank 6, can enough carry out make full use of to the heat in the flue gas, avoids the wasting of resources, can improve the liquid temperature who gets into in the casing 1 again, reduces the inside and outside difference in temperature of U type heat exchange tube 5 in the casing 1, avoids U type heat exchange tube 5 to produce great thermal stress and leads to bending fracture.

The heat exchanger main part and the preheating box 6 are arranged from top to bottom, so that the heat exchanger is compact in structure, occupied area is reduced, meanwhile, the shell pass outlet 12 and the shell pass inlet 11 are respectively arranged at the upper end and the lower end of the shell 1, the liquid outlet 62 and the liquid inlet 61 are respectively arranged at the upper end and the lower end of the preheating box 6, liquid flows from bottom to top, the flowing speed of the liquid is reduced, the contact time of the liquid and flue gas is prolonged, and sufficient heat exchange is achieved between the liquid and the flue gas.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should be able to make changes, alterations, additions or substitutions within the scope of the present invention.

Claims

1. A novel heat exchanger is characterized in that: the heat exchanger comprises a heat exchanger main body and a preheating box, wherein the heat exchanger main body comprises a shell, a U-shaped heat exchange tube, a baffle plate, a tube plate and a tube box, one end of the shell is closed, and the other end of the shell is open; the U-shaped heat exchange tubes are positioned in the shell, a plurality of U-shaped heat exchange tubes are arranged, two ends of each U-shaped heat exchange tube penetrate through the tube plate and are respectively communicated with the air inlet cavity and the air outlet cavity, the upper end and the lower end of the shell are respectively provided with a shell pass outlet and a shell pass inlet, the baffle plate is fixed in the shell between the shell pass inlet and the shell pass outlet, and the positions of the baffle plate, which correspond to the U-shaped heat exchange tubes, are provided with through holes for the U-shaped heat;

2. The novel heat exchanger of claim 1, wherein: the shell is connected with the tube plate through flanges, and the tube plate is connected with the tube box through flanges.