CN211261869U

CN211261869U - Heat exchanger for ship

Info

Publication number: CN211261869U
Application number: CN201922425616.4U
Authority: CN
Inventors: 陈光新
Original assignee: Daye Tiantong Heat Exchange Equipment Co ltd
Current assignee: Daye Tiantong Heat Exchange Equipment Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-14
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a field boats and ships heat exchanger technical field provides a heat exchanger for boats and ships, including casing and the fixed center tube that sets up inside the casing, form a cavity that is used for holding the sea water between center tube and the casing, the both sides of casing are equipped with sea water import and sea water export respectively, the upper and lower both ends of casing are equipped with circulation fluid pipe export and circulation fluid pipe entry respectively, the casing is the toper structure of narrowing gradually from bottom to top, circulation fluid pipe spiral is around the center tube winding, and the internal diameter of circulation fluid pipe is imported by it and is reduced gradually to its export for solve the corrosion problems of heat exchanger for boats and ships.

Description

Heat exchanger for ship

Technical Field

The utility model relates to a boats and ships heat exchanger technical field especially relates to a can effectively prevent heat exchanger for boats and ships of cavitation erosion.

Background

At present, in order to meet the use and operation requirements, a ship power system needs to adopt seawater to cool media such as high-temperature hot water, high-temperature steam and the like. In the equipment for exchanging heat between seawater and high-temperature media, the safety and reliability are always the problems which are difficult to solve.

In the actual operation of the ship, as the heat exchanger material of the ship is mainly metal copper, the cooling water is seawater, the heat exchanger is contacted with the seawater for a long time when the long ship runs, and the temperature of the circulating liquid entering the heat exchanger after the engine is discharged is very high, the seawater side pipe wall at the inlet section of the high-temperature heat exchanger is seriously corroded under the dual action of high-temperature and high-salinity seawater, and the local area is even corroded and perforated; the high-temperature heat exchanger is usually a coil heat exchanger, and after the coil is corroded and perforated, a high-temperature medium is directly mixed with seawater, so that the device cannot continue to work, the device becomes a great potential safety hazard on a ship, and serious safety accidents can be caused if the high-temperature medium is not timely treated.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at providing a heat exchanger for boats and ships for solve the corrosion problem of heat exchanger for boats and ships.

(II) contents of utility model

In order to solve the technical problem, the utility model provides a heat exchanger for boats and ships, including casing and the fixed center tube that sets up in the casing inside, form a cavity that is used for holding the sea water between center tube and the casing, the both sides of casing are equipped with sea water import and sea water export respectively, the upper and lower both ends of casing are equipped with circulation fluid pipe export and circulation fluid pipe entry respectively, the casing is the toper structure of narrowing gradually from bottom to top, circulation fluid pipe spiral is round the center tube winding, and the internal diameter of circulation fluid pipe is reduced gradually by its import to its export.

Wherein, the seawater inlet is arranged at the outer side of the end with larger diameter of the shell, and the seawater outlet is arranged at the outer side of the end with smaller diameter of the shell.

Wherein, the center tube is arranged in the middle of the shell.

Wherein, the shell is an iron cupronickel shell with the inner surface coated with a corrosion-resistant coating.

Wherein, the thickness of the upper end and the lower end of the shell is kept constant.

Wherein, the distance between two adjacent turns of the spiral circulating liquid pipe is gradually increased from bottom to top.

(III) advantageous effects

The utility model provides a heat exchanger for boats and ships, compare in current boats and ships heat exchanger, it sets up the casing to be the toper structure that narrows gradually from bottom to top, circulation liquid pipe spiral is around the center tube winding, and the internal diameter of circulation liquid pipe is crescent from the import of circulation liquid pipe to the export of circulation liquid pipe, make at the import department of high temperature circulation liquid like this, the pipe diameter is great, the velocity of flow of high temperature medium is lower, the convective heat transfer coefficient of high temperature medium is less, the high temperature medium is great with the inside pipe wall heat transfer difference in temperature, pipe wall surface temperature is lower, can prevent that the sea water in the casing from boiling here and producing cavitation erosion to the heat exchange pipe outer wall; at the outlet of the high-temperature medium, namely the outlet of the circulating liquid pipe, the pipe diameter is smaller, the flow velocity of the high-temperature medium is higher, and the convective heat transfer coefficient of the high-temperature medium is larger, so that the heat transfer coefficient in the pipe is favorably improved; meanwhile, the shell is of a conical structure which is gradually narrowed from bottom to top, the inner diameter of the shell at the inlet of the circulating liquid pipe is larger, the more seawater the shell contains, the better cooling effect on the circulating liquid pipe is, and the heat exchange efficiency is improved.

Drawings

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

Fig. 1 is the overall structure schematic diagram of the heat exchanger for the ship of the present invention.

The reference numerals in the figures illustrate:

1. a housing; 2. A central tube; 31. a seawater inlet;

32. a seawater outlet; 4. A circulating liquid pipe; 41. An inlet of the circulating liquid pipe;

42. and an outlet of the circulating liquid pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The heat exchanger for the ship of the present embodiment, as shown in fig. 1, includes a shell 1 in a tapered structure that narrows from bottom to top, a central tube 2 is disposed in the middle of the shell 1, a cavity for containing seawater is formed between the central tube 2 and the shell 1, and a seawater inlet 31 and a seawater outlet 32 are respectively disposed on two sides of the shell 1. Wherein, the seawater inlet 31 is arranged at the outer side of the end with larger diameter of the shell 1, the seawater outlet 32 is arranged at the outer side of the end with smaller diameter of the shell 1, the circulating liquid pipe 4 is spirally wound around the central pipe 2, the circulating liquid pipe inlet 41 extends out from the lower part of the shell, the circulating liquid pipe outlet 42 extends out from the upper part of the shell, and the inner diameter of the circulating liquid pipe 4 is gradually reduced from the inlet to the outlet, compared with the existing ship heat exchanger, the shell 1 is arranged to be in a tapered structure which is gradually narrowed from bottom to top, the circulating liquid pipe 4 is spirally wound around the central pipe 2, and the inner diameter of the circulating liquid pipe 4 is gradually increased from the inlet of the circulating liquid pipe 4 to the outlet of the circulating liquid pipe 4, so that at the inlet of the high-temperature circulating liquid, the pipe diameter is larger, the flow rate of the high-temperature medium is lower, the surface temperature of the pipe wall is low, so that seawater in the shell 1 can be prevented from boiling at the surface to generate cavitation corrosion on the outer wall of the heat exchange pipe; at the outlet of the high-temperature medium, namely the outlet of the circulating liquid pipe 4, the pipe diameter is smaller, the flow velocity of the high-temperature medium is higher, and the convective heat transfer coefficient of the high-temperature medium is larger, so that the heat transfer coefficient in the pipe is favorably improved; meanwhile, the shell 1 is of a conical structure which is gradually narrowed from bottom to top, the inner diameter of the shell 1 at the inlet of the circulating liquid pipe 4 is larger, the more seawater the shell contains, the better cooling effect on the circulating liquid pipe 4 is, and the heat exchange efficiency is improved.

Further, the shell 1 is made of iron white copper, and the inner surface of the shell 1 is coated with a corrosion-resistant coating, so that the corrosion resistance of the heat exchanger for the ship is further enhanced; the distance between two adjacent turns of the spiral circulating liquid pipe 4 is gradually increased from bottom to top, so that the circulating liquid pipe 4 is more uniformly contacted with the seawater, and the phenomenon of non-uniform heat exchange is avoided.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a heat exchanger for boats and ships, includes the casing and fixes the setting the inside center tube of casing, the center tube with form a cavity that is used for holding the sea water between the casing, the both sides of casing are equipped with sea water import and sea water export respectively, the upper and lower both ends of casing are equipped with circulation liquid pipe export and circulation liquid pipe entry respectively, its characterized in that, the casing is the toper structure of narrowing gradually from bottom to top, circulation liquid pipe spiral is round the center tube winding, just the internal diameter of circulation liquid pipe reduces to its export by its import gradually.

2. The heat exchanger as claimed in claim 1, wherein the seawater inlet is disposed outside the end of the housing having a larger diameter, and the seawater outlet is disposed outside the end of the housing having a smaller diameter.

3. The marine heat exchanger of claim 1, wherein the center pipe is disposed in a middle of the housing.

4. The heat exchanger for a ship according to claim 1, wherein the shell is an iron cupronickel shell whose inner surface is coated with a corrosion-resistant coating.

5. The heat exchanger as claimed in claim 1, wherein the thickness of the upper and lower ends of the housing is constant.

6. The heat exchanger as claimed in claim 1, wherein the pitch between adjacent turns of the spiral circulating liquid pipe is gradually increased from bottom to top.