CN213599882U

CN213599882U - Heat exchanger

Info

Publication number: CN213599882U
Application number: CN202022059305.3U
Authority: CN
Inventors: 李�诚; 唐叔建; 路广遥; 刘青松; 周建明; 叶亮; 刘强; 翟立宏; 芮旻; 秦小明; 刘志斌; 李权彰; 乔建毅; 张超
Original assignee: China General Nuclear Power Corp; China Nuclear Power Technology Research Institute Co Ltd; CGN Power Co Ltd
Current assignee: China General Nuclear Power Corp; China Nuclear Power Technology Research Institute Co Ltd; CGN Power Co Ltd; China Nuclear Power Institute Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-07-02
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses a heat exchange device, which comprises a container and at least one heat exchange channel arranged in the container, wherein a first fluid flows in the heat exchange channel, a second fluid with a temperature different from that of the first fluid is contained in the container, and the heat exchange channel comprises at least one heat preservation area of which the outer wall is provided with a heat insulation structure; the heat exchange channel is sequentially provided with an inlet section, a heat exchange section and an outlet section along the flowing direction of the first fluid, the heat preservation area is arranged on the inlet section, and the heat insulation structure is fixedly arranged on the outer wall of the inlet section. The utility model discloses a set up the heat preservation district at heat transfer passageway outer wall, make the heat transfer fluid can keep heat transfer fluid's self temperature at the entering container initial stage to performance heat transfer effect after reacing the heat transfer section, improve equipment's whole heat exchange efficiency, improve equipment operation's stability simultaneously.

Description

Heat exchanger

Technical Field

The utility model relates to a heat exchange technology field especially relates to a heat transfer device.

Background

In the field of nuclear power or petrochemical industry at present, when fluid in a container needs to be cooled or heated, another heat exchange fluid with a larger temperature difference with the fluid can be used for carrying out heat exchange operation on the fluid, but because the temperature in the container is usually more extreme, at the initial stage of heat exchange, the temperature of the heat exchange fluid often reaches the region needing heat exchange and is already converged with the fluid needing heat exchange, the effect of heat exchange cannot be achieved at the first time, so that the heat exchange efficiency is low, and the stability of equipment operation is poor.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in that to prior art's defect, a heat transfer device is provided.

The utility model provides a technical scheme that its technical problem adopted is:

the heat exchange device comprises a container and at least one heat exchange channel arranged in the container, wherein a first fluid flows in the heat exchange channel, a second fluid with the temperature different from that of the first fluid is contained in the container, and the heat exchange channel comprises at least one heat preservation area of which the outer wall is provided with a heat insulation structure;

the heat exchange channel is sequentially provided with an inlet section, a heat exchange section and an outlet section along the flowing direction of the first fluid, the heat preservation area is arranged on the inlet section, and the heat insulation structure is fixedly arranged on the outer wall of the inlet section.

Preferably, the container comprises an open-mouth body and a cover body covering the open end of the body, the cover body is detachably connected with the body, and the heat exchange channel is fixedly connected with the cover body.

Preferably, the cover body is fixedly connected with the inlet section and the outlet section respectively, and the cover body is provided with at least one first feed opening for enabling the first fluid to enter the heat exchange channel and at least one first discharge opening for enabling the first fluid to leave the heat exchange channel.

Preferably, the heat exchange device further comprises a support member for fixing the heat insulation structure, the support member is fixedly connected with the outer wall of the inlet section, and the heat insulation structure is sleeved on the outer wall of the inlet section and is fixedly abutted to the support member.

Preferably, the cover body is further provided with at least two mutually independent feeding units and discharging units, the feeding units are communicated with the first feeding hole, and the discharging units are communicated with the first discharging hole.

Preferably, the feeding unit further comprises a second feeding hole for introducing the first fluid into the feeding unit and a second discharging hole for leading the first fluid after heat exchange out of the discharging unit.

Preferably, the body is provided with a third feed port for allowing the second fluid to flow into the container and a third discharge port for allowing the second fluid to flow out of the container.

Preferably, the heat insulation structure is a heat insulation pipe provided with at least one heat insulation channel, and the inner diameter of the heat insulation channel is larger than or equal to the outer diameter of the heat exchange channel.

Preferably, the heat insulation structure is a polyimide heat insulation pipe or a polyether-ether-ketone heat insulation pipe.

Preferably, the heat insulation structure comprises a first heat insulation layer and a second heat insulation layer which are concentrically sleeved, and further comprises a first end cover and a second end cover which are arranged at two ends of the heat insulation structure, the first end cover, the second end cover, the first heat insulation layer and the second heat insulation layer are hermetically connected to form a closed cavity, and a heat insulation medium with a low heat conductivity coefficient is arranged in the closed cavity.

The utility model discloses following beneficial effect has: through setting up the heat preservation district at heat transfer passageway outer wall, make the heat transfer fluid can keep heat transfer fluid's self temperature at the entering container initial stage to play the heat transfer effect after arriving the heat transfer section, improve equipment's whole heat exchange efficiency, improve equipment operation's stability simultaneously.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a schematic structural view of an embodiment of the heat exchange device of the present invention;

FIG. 2 is a schematic structural view of a heat insulating structure according to a first embodiment of the present invention;

FIG. 3 is a schematic structural view of a heat insulating structure according to a second embodiment of the present invention;

FIG. 4 is a schematic structural view of a heat insulating structure with heat exchange passages according to a second embodiment of the present invention;

FIG. 5 is a schematic structural view of a heat exchange structure in a third embodiment of the present invention;

fig. 6 is a schematic structural view of a heat insulation structure with a heat exchange passage according to a third embodiment of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The utility model provides a heat exchange device, but wide application in fields such as petroleum, chemical industry. As shown in fig. 1, the utility model provides a heat exchange device can include container 1 and locate a plurality of heat transfer passageway 2 in the container 1, wherein, the reation kettle of container 1 for being used for taking place the heat transfer reaction specifically can be the pressure vessel of reactor, and the preferred parallel arrangement of a plurality of heat transfer passageways 2 is in this pressure vessel. A first fluid A flows in the heat exchange channel 2, a second fluid B is contained in the container 1, and the temperature of the first fluid A is obviously different from that of the second fluid B. The utility model discloses in, first fluid A is heat transfer fluid, through letting in mobile first fluid A in container 1, and the temperature of second fluid B is neutralized to realize the heat transfer effect. In some embodiments, the heat exchange channel 2 is provided with an inlet section 21, a heat exchange section 22, and an outlet section 23 in sequence along the flow direction of the first fluid a, and generally, the first fluid a needs to exchange heat with the second fluid B in the heat exchange section 22. And be high temperature high pressure environment in the container 1 usually, for avoiding first fluid A not arrive heat transfer section 22 when the initial stage of getting into container 1 temperature just with second fluid B or container 1 in the temperature trend, thereby can't realize the heat transfer purpose, the utility model discloses a heat transfer passageway 2 still includes at least one outer wall at entrance 21 and is equipped with thermal-insulated structure 3's heat preservation district, first fluid A does not take place the heat exchange with container 1 internal environment in the heat preservation district promptly, leaves the heat preservation district as first fluid A, reachs the heat transfer district after, takes place the heat exchange with the second fluid B in the container 1 again, thereby improves heat exchange efficiency. The utility model discloses in, the heat preservation district is the region that thermal-insulated structure 3 covered promptly, and the length in heat preservation district can be the same with entry 21, also can set up thermal-insulated structure 3 in entry 21's subregion, and the length in heat preservation district can be less than entry 21 length promptly, and the length in heat preservation district can be adjusted according to user's in-service use needs, does not do the injecing here.

In the utility model discloses in, container 1 is the U-shaped cauldron specifically in some embodiments, including the body 11 of open form and cover 12 at the open end of body 11, lid 12 can be dismantled with body 11 and be connected, and connecting device such as concrete accessible screw, buckle realizes dismantling the connection, and lid 12 includes and locates diapire 121 on body 11 and the roof 122 that sets up with this diapire 121 relatively, and diapire 121 and the airtight reaction chamber that forms of body 11 of lid 12, heat transfer channel 2 and lid 12 fixed connection place in this reaction chamber. In some embodiments, the body 11 is further provided with a third inlet 111 for allowing the second fluid B to flow into the body 11 and a third outlet 112 for allowing the second fluid B to flow out of the body 11, wherein the third inlet 111 and the third outlet 112 are preferably disposed on two sides of the body 11.

The heat exchange channel 2 is sequentially provided with an inlet section 21, a heat exchange section 22 and an outlet section 23 along the flowing direction of the first fluid a, the first fluid a enters from the inlet section 21, the heat exchange work is completed in the heat exchange section 22, and the first fluid a leaves the heat exchange channel 2 from the outlet section 23, in some embodiments, the shape of the heat exchange channel 2 is the same as that of the inner cavity of the container 1, specifically, the heat exchange channel 2 may be a U-shaped heat exchange channel, the two ends of the U-shaped heat exchange channel 2, which are far away from the bottom of the container 1, are the inlet section 21 and the outlet section 23 respectively, and the heat exchange section 22 between the inlet section 21 and the outlet section 23 is preferably arranged at the bottom of the container 1, namely, an area covered by the second.

In some embodiments, the cover 12 is fixedly connected to the inlet section 21 and the outlet section 23, respectively, the cover 12 is provided with a plurality of through holes penetrating from the top wall 122 to the bottom wall 121, the plurality of through holes comprise at least one first feed opening 123 for allowing the first fluid A to enter the heat exchange channel 2 and at least one first discharge opening 124 for allowing the first fluid A to flow out of the heat exchange channel 2, the number of the first feed openings 123 and the number of the first discharge openings 124 are preferably the same, and the number of the heat exchange channels 2 is equal to that of the heat exchange channels, the inlet section 21 and the outlet section 23 of the heat exchange channels 2 are respectively connected with the first feed port 123 and the first discharge port 124 in a tight fit manner, in some embodiments the inlet section 21 and the outlet section 23 are slightly above the top surface of the first inlet port 123 and the first outlet port 124, so that the first fluid a smoothly enters the inlet section 21 through the first inlet port 123 and leaves the heat exchange channel 2 from the outlet section 23 through the first outlet port 124.

In some embodiments, the heat exchange device further includes a support 4 for fixing the heat insulation structure 3, the support 4 is fixedly connected, preferably welded, to the outer wall of the inlet section 21, and the heat insulation structure 3 is sleeved on the outer wall of the inlet section 21 and is fixed in abutment with the support 4. Preferably, the distance from the support 4 to the bottom wall 121 of the cover 12 is equal to the length of the heat insulation structure 3, i.e. the heat insulation structure 3 abuts between the cover 12 and the support 4. In some embodiments, the top wall 122 of the cover 12 is further provided with a feeding unit 51 and a discharging unit 52 which are independent from each other, the feeding unit 51 is communicated with the first feeding port 123, in some embodiments, the feeding unit 51 is further provided with a second feeding port 511, that is, the first fluid a can be stored in the feeding unit 51 through the second feeding port 511, and when a heat exchange operation is required, the first fluid a enters the heat exchange channel 2 through the first feeding port 123; the discharging unit 52 is connected to the first discharging port 124, and in some embodiments, the discharging unit 52 is further provided with a second discharging port 521, so that the heat-exchanged first fluid a can be extracted through the third discharging port 112.

In the present invention, the above-mentioned first fluid a and second fluid B can be both gas or liquid, and in the fields of nuclear power, petrochemical industry, etc., the second fluid B is usually a liquid medium, and in some embodiments, has a certain corrosivity. Conventional heat preservation cotton can dissolve in this liquid medium, pollutes this liquid medium even, so can't be as the thermal-insulated structure 3 in the utility model discloses. In the present invention, the heat insulating structure 3 is a heat insulating structure 3 that can be immersed in a liquid medium.

As a first embodiment of the present invention, referring to fig. 2, the heat insulation structure 3 is a heat insulation pipe provided with a heat insulation passage 31, and the inner diameter of the heat insulation pipe is larger than or equal to the outer diameter of the heat exchange passage 2 so as to be sleeved outside the heat exchange passage 2. In this embodiment, the heat insulation pipes may be made of Polyimide (PI) or Polyetheretherketone (PEEK) or other heat insulation materials with low thermal conductivity, high temperature resistance, good stability and less corrosion by liquid according to the working conditions in the container 1, each heat exchange channel 2 corresponds to one heat insulation structure 3, in this embodiment, each heat insulation pipe may correspond to one support 4, the support 4 may also be a whole, and the plurality of heat insulation pipes are all fixed in abutment with the whole support 4.

As a second embodiment of the present invention, referring to fig. 3 and 4, on the basis of the first embodiment, the heat insulation pipe includes a plurality of heat insulation channels 31 arranged in parallel, specifically, a honeycomb briquette structure, and a plurality of heat exchange channels 2 are inserted into the heat insulation pipe, in this embodiment, the heat insulation pipe can also select Polyimide (PI) material or Polyetheretherketone (PEEK) material according to the working condition in the container 1, or other heat insulation materials with low thermal conductivity and high temperature resistance, good stability and difficult corrosion by liquid, and a plurality of heat exchange channels 2 are inserted into the same heat insulation pipe.

As a third embodiment of the present invention, referring to fig. 5 and fig. 6, the heat insulation structure 3 includes a first heat insulation layer 32 and a second heat insulation layer 33 which are concentrically sleeved, wherein the inner diameter of the second heat insulation layer 33 is greater than or equal to the outer diameter of the heat exchange channel 2, and the heat insulation structure 3 is sleeved with the heat exchange channel 2. The heat insulation structure 3 further comprises a first end cover 34 and a second end cover 35 which are arranged at two ends of the heat insulation structure 3, the first end cover 34, the second end cover 35, the first heat insulation layer 32 and the second heat insulation layer 33 are connected in a sealing mode, a sealed cavity 36 is formed between the first heat insulation layer 32 and the second heat insulation layer 33, a heat insulation medium 37 with low heat conductivity coefficient is arranged in the sealed cavity 36, and the heat insulation medium 37 is arranged in the heat insulation structure 3 in a sealing mode through the first heat insulation layer 32, the second heat insulation layer 33, the first end cover 34 and the second end cover 35 which are arranged in a combined mode. In this embodiment, the insulating medium 37 may be made of any material having excellent heat insulating properties, and is provided in the closed cavity 36 so as not to be affected by the second fluid B or the environment in the container 1. In this embodiment, it is preferable that the first insulating layer 32, the second insulating layer 33, the first end cap 34 and the second end cap 35 are made of a metal material, such as stainless steel, the first insulating layer 32 and the second insulating layer 33 are concentrically arranged, the first end cap 34 and the second end cap 35 are hermetically welded to both ends of the insulating structure 3, respectively, and it is preferable that the insulating medium 37 between the first insulating layer 32 and the second insulating layer 33 is made of insulating cotton or silicate to prevent heat conduction. The heat-insulating material which is easily dissolved by the second fluid B, such as heat-insulating cotton or silicate, is placed in the sealed cavity, and the cavity has stable performance and is not easily dissolved or corroded by the second fluid B, so that the heat-insulating effect can be achieved, and the second fluid B is not polluted.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A heat exchange device is characterized by comprising a container (1) and at least one heat exchange channel (2) arranged in the container (1), wherein a first fluid (A) flows in the heat exchange channel (2), a second fluid (B) with a temperature different from that of the first fluid (A) is contained in the container (1), and the heat exchange channel (2) comprises at least one heat preservation area of which the outer wall is provided with a heat insulation structure (3);

the heat exchange channel (2) is sequentially provided with an inlet section (21), a heat exchange section (22) and an outlet section (23) along the flowing direction of the first fluid (A), the heat preservation area is arranged on the inlet section (21), and the heat insulation structure (3) is fixedly arranged on the outer wall of the inlet section (21).

2. The heat exchange device according to claim 1, wherein the container (1) comprises an open body (11) and a cover (12) covering the open end of the body (11), the cover (12) is detachably connected with the body (11), and the heat exchange channel (2) is fixedly connected with the cover (12).

3. A heat exchange device according to claim 2, wherein the cover body (12) is fixedly connected with the inlet section (21) and the outlet section (23), respectively, and at least one first inlet (123) for the first fluid (a) to enter the heat exchange channel (2) and at least one first outlet (124) for the first fluid (a) to leave the heat exchange channel (2) are provided on the cover body (12).

4. The heat exchange device according to claim 3, further comprising a support (4) for fixing the heat insulation structure (3), wherein the support (4) is fixedly connected with the outer wall of the inlet section (21), and the heat insulation structure (3) is sleeved on the outer wall of the inlet section (21) and is fixedly abutted against the support (4).

5. The heat exchange device according to claim 4, wherein the cover body (12) is further provided with at least two mutually independent feeding units (51) and discharging units (52), the feeding units (51) are communicated with the first feeding port (123), and the discharging units (52) are communicated with the first discharging port (124).

6. The heat exchange device according to claim 5, characterized in that the feed unit (51) further comprises a second feed opening (511) for introducing the first fluid (A) into the feed unit (51) and a second discharge opening (521) for discharging the first fluid (A) after heat exchange out of the discharge unit (52).

7. A heat exchange device according to claim 4, characterised in that the body (11) is provided with a third inlet (111) for the second fluid (B) into the vessel (1) and a third outlet (112) for the second fluid (B) out of the vessel (1).

8. A heat exchange device according to claim 1, characterized in that the heat insulation structure (3) is a heat insulation pipe provided with at least one heat insulation channel (31), the inner diameter of the heat insulation channel (31) being larger than or equal to the outer diameter of the heat exchange channel (2).

9. The heat exchange device according to claim 8, wherein the insulation structure (3) is a polyimide insulation tube or a polyetheretherketone insulation tube.

10. The heat exchange device according to claim 1, wherein the heat insulation structure (3) comprises a first heat insulation layer (32) and a second heat insulation layer (33) which are concentrically sleeved, and further comprises a first end cover (34) and a second end cover (35) which are arranged at two ends of the heat insulation structure (3), the first end cover (34), the second end cover (35), the first heat insulation layer (32) and the second heat insulation layer (33) are hermetically connected to form a closed cavity (36), and a heat insulation medium (37) with a low heat conductivity coefficient is arranged in the closed cavity (36).