Falling film type indirect evaporative condenser

Abstract

The utility model discloses a falling film type indirect evaporative condenser, which relates to a condenser and comprises a pipe fitting, the pipe fitting is composed of an inner pipe arranged at the axis of an outer pipe, the inner pipe is provided with connecting parts arranged in a circumferential array, and each connecting part comprises a first fin connected with the inner wall of the outer pipe; a kidney-shaped groove is formed in the outer wall of the outer pipe, and spiral grooves communicated with the two ends of the kidney-shaped groove respectively are formed in the outer pipe. According to the falling film type indirect evaporative condenser, flowing liquid in the inner pipe is heated, and therefore the heat energy utilization rate of steam is further increased.

Description

Technical Field

[0001] The utility model relates to a condenser, in particular to a falling film type indirect evaporation condenser. Background Art

[0002] The falling film condenser uses a cooling medium (usually water or coolant) to make the gaseous fluid form a thin film inside the device, and then condense into a liquid on the cooling surface.

[0003] Reference publication (announcement) number: CN113494856A, publication (announcement) date: 2021-10-12, the disclosure refers to a vertical falling film evaporative condenser, including a box body, in which a vertical falling film high-efficiency condensing device, a spray system and a water collecting tray are arranged; the vertical falling film high-efficiency condensing device includes a first inlet header, a first outlet header and a plurality of vertical condensing devices, and the plurality of vertical condensing devices are vertically placed between the first inlet header and the first outlet header; the vertical condensing device includes a second inlet header, a second outlet header and a vertical condensing heat exchange tube, and the vertical condensing heat exchange tube is vertically placed between the second inlet header and the second outlet header. Compared with the horizontal coil or the coil arranged in a regular triangle cross-row manner in the prior art, the present invention forms a descending water film on the outer surface of the vertical condensing heat exchange tube from top to bottom by spraying water; under the action of the spraying water, under the condition of the same amount of water, the flow rate of the spraying water forming the water film can be accelerated, and the condensation effect can be achieved more efficiently.

[0004] In the prior art including the above patents, the original evaporation chamber is realized by heating the pipes arranged in a circumferential array, but the heat exchange efficiency of this pipe structure is relatively general. Utility Model Content

[0005] The utility model aims to provide a falling film indirect evaporative condenser to solve the above problems.

[0006] In order to achieve the above-mentioned object, the utility model provides the following technical solution: a falling film indirect evaporative condenser, comprising a pipe fitting, which is composed of an inner tube arranged on the axis of an outer tube, the inner tube is provided with a connecting portion arranged in a circumferential array, and the connecting portion includes a first fin connected to the inner wall of the outer tube;

[0007] The outer wall of the outer tube is provided with a waist groove, and the outer tube is provided with a spiral groove which is respectively connected with two ends of the waist groove.

[0008] As a preferred embodiment, it also includes a body, which is divided into a liquid inlet chamber, an evaporation chamber and a liquid outlet chamber according to the structure;

[0009] The pipe member is arranged in the evaporation chamber, and the inner pipe is used to connect the liquid inlet chamber and the liquid outlet chamber;

[0010] The main body comprises a steam inlet, and the center of the waist groove faces the steam inlet.

[0011] Preferably, a membrane tube rack is provided in the evaporation chamber, and the tubes are in a plurality and arranged on the membrane tube rack in a circular array, and each of the tubes maintains a predetermined spacing.

[0012] Preferably, the connecting portion comprises plate-type intercepting members, which are located inside the inner tube and are arranged in an equidistant array along the radial direction of the connecting portion.

[0013] Preferably, the inner tube is a copper tube fitting.

[0014] Preferably, the outer tube is an aluminum alloy plate.

[0015] In the above technical scheme, the utility model provides a falling film indirect evaporative condenser, which has the following beneficial effects: steam is directly blown into the waist groove, and then introduced into the spiral groove from the waist groove, so that the hot gas flows around the outer tube body, thereby the outer tube absorbs the heat energy, and secondly, the inner tube uses the first fin to absorb the temperature inside the outer tube, thereby heating the flowing liquid in the inner tube, thereby further improving the thermal energy utilization rate of the steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0018] Figure 2 A schematic diagram of a cross-sectional structure provided for an embodiment of the utility model;

[0019] Figure 3 A schematic structural diagram of a pipe fitting provided in an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Main body; 11. Liquid inlet chamber; 12. Evaporation chamber; 13. Liquid outlet chamber; 14. Steam inlet; 15. Condensate outlet; 16. Liquid inlet; 17. Liquid outlet; 2. Membrane tube rack; 3. Pipe fittings; 4. Outer tube; 41. Waist groove; 412. Spiral groove; 5. Inner tube; 51. Connecting part; 511. First fin; 512. Plate interceptor; 6. Separation tank. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-3 As shown, a falling film indirect evaporative condenser includes a pipe member 3, which is composed of an inner pipe 5 arranged axially on an outer pipe 4, and the inner pipe 5 is provided with connecting parts 51 arranged in a circumferential array, and the connecting part 51 includes a first fin 511 connected to the inner wall of the outer pipe 4;

[0024] The outer wall of the outer tube 4 is provided with a waist groove 41 , and the outer tube 4 is provided with a spiral groove 42 which is connected with both ends of the waist groove 41 .

[0025] Specific, combined Figure 1 It can be seen that the pipe fittings 3 in the above technical features are arranged on the membrane tube rack 2 in a circular array, and each pipe fitting 3 maintains a predetermined spacing.

[0026] The falling film condenser comprises a main body 1 and a separation tank 6. A membrane tube rack 2 is installed inside the main body 1 and is divided into a liquid inlet chamber 11, an evaporation chamber 12 and a liquid outlet chamber 13 by the membrane tube rack 2. The membrane tube rack 2 is installed in the evaporation chamber 12.

[0027] The liquid enters the liquid inlet 16 of the body 1 into the liquid inlet chamber 11, then flows down to the liquid outlet chamber 13 through the inner tube 5, and finally flows from the liquid outlet chamber 13 into the separation tank 6 through the liquid outlet 17 of the body 1, and then is discharged.

[0028] Hot steam enters through the steam inlet 14 on the body 1 , and then condensed water in the evaporation chamber 12 is discharged through the condensed water outlet 15 .

[0029] During this period, the steam blows directly into the waist groove 41, and then is introduced into the spiral groove 42 from the waist groove 41, so that the hot gas flows around the outer tube 4 in the direction of the tube body, thereby the outer tube 4 absorbs the heat energy. Secondly, the inner tube 5 uses the first fin 511 to absorb the temperature inside the outer tube 4, thereby heating the flowing liquid in the inner tube 5, thereby further improving the thermal energy utilization rate of the steam.

[0030] As an embodiment further provided by the present invention, the two spiral grooves 412 located on the outer tube 4 have opposite spiral directions.

[0031] As an embodiment further provided by the present invention, the connection part 51 includes plate-type interceptors 512, which are located inside the inner tube 5 and arranged in an equidistant array along the radial direction of the connection part 51. This increases the contact of the liquid when it passes through, thereby increasing the heat absorbed by the liquid in the inner tube 5.

[0032] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A falling film indirect evaporative condenser, characterized in that: The pipe member (3) comprises an inner pipe (5) arranged on the axis of an outer pipe (4), the inner pipe (5) being provided with connecting parts (51) arranged in a circumferential array, the connecting parts (51) comprising a first fin (511) connected to the inner wall of the outer pipe (4); The outer wall of the outer tube (4) is provided with a waist groove (41), and the outer tube (4) is provided with a spiral groove (42) which is respectively connected to both ends of the waist groove (41).

2. A falling film indirect evaporative condenser according to claim 1, characterized in that: It also includes a body (1), which is divided into a liquid inlet chamber (11), an evaporation chamber (12) and a liquid outlet chamber (13) according to its structure; The pipe member (3) is arranged in the evaporation chamber (12), and the inner pipe (5) is used to connect the liquid inlet chamber (11) and the liquid outlet chamber (13); The main body (1) comprises a steam inlet (14), and the center of the waist groove (41) faces the steam inlet (14).

3. A falling film indirect evaporative condenser according to claim 2, characterized in that: A membrane tube rack (2) is arranged in the evaporation chamber (12), and the tubes (3) are multiple in number and arranged on the membrane tube rack (2) in a circular array, and each of the tubes (3) maintains a predetermined spacing.

4. A falling film indirect evaporative condenser according to claim 1, characterized in that: The connecting portion (51) comprises plate-type intercepting members (512), which are located inside the inner tube (5) and are arranged in an array equidistantly along the radial direction of the connecting portion (51).

5. The falling film indirect evaporative condenser according to claim 1, characterized in that: The inner tube (5) is a copper tube fitting.

6. A falling film indirect evaporative condenser according to claim 1, characterized in that: The outer tube (4) is an aluminum alloy plate.

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