Fin type heat exchanger capable of automatically descaling

Abstract

The utility model discloses a fin type heat exchanger capable of automatically descaling, which comprises a shell, and a heat exchange liquid inlet pipe and a heat exchange liquid outlet pipe are arranged on one side of the shell. A liquid inlet collecting pipe is arranged at one end of the heat exchange liquid inlet pipe, a heat exchange pipe bundle is arranged behind the liquid inlet collecting pipe, the other end of the heat exchange pipe bundle is connected with a liquid outlet collecting pipe, the liquid outlet collecting pipe is connected to the heat exchange liquid outlet pipe, fins are arranged outside the heat exchange pipe bundle, and descaling mechanisms are arranged in the heat exchange liquid inlet pipe and the heat exchange liquid outlet pipe. The descaling mechanisms are installed in the heat exchange liquid inlet pipe and the heat exchange liquid outlet pipe, the PLC controls the electric control switch A to be communicated with the electrode A and the electrode B to be powered on, incrustation accumulated in the heat exchange liquid inlet pipe and the heat exchange liquid outlet pipe is electrolyzed, after the incrustation is removed, the incrustation is mixed in heat exchange liquid to be discharged, the heat exchanger is kept unblocked, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and specifically relates to a fin heat exchanger capable of automatically removing scale. Background Technology

[0002] The finned tube heat exchanger is a common heat exchange device, which is widely used in many industries, including air conditioning, cooling, heating, chemical industry, and pharmacy. The working principle of the finned tube heat exchanger is that the fluid flows inside the tube bundle, and the heat is transferred from the fluid inside the tube to the fluid outside the tube. The fins can increase the outer surface area of the tube, thereby improving the heat transfer efficiency. The advantages of the finned tube heat exchanger include high heat transfer efficiency, small occupied space, high reliability, and convenient maintenance. However, there are also some disadvantages. The concentration of Ca(HCO3)2 in the circulating cooling water will increase with the increase of the use time of the heat exchanger. When the concentration reaches the saturation state or the water temperature on the surface of the heat exchanger rises, it will decompose into CaCO3 and precipitate in the form of scale on the heat transfer surface of the heat exchanger, forming a dense scale, which reduces the heat transfer efficiency of the heat exchanger. Content of the Utility Model

[0003] (1) Technical Problem to be Solved

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a fin heat exchanger capable of automatically removing scale, so as to solve the problem of removing the scale deposited on the heat transfer surface of the heat exchanger mentioned in the above background technology.

[0005] (2) Technical Solution

[0006] To achieve the above purpose, the utility model provides the following technical solution: a fin heat exchanger capable of automatically removing scale, including a shell, on one side of the shell, there is an inlet heat exchange liquid pipe and an outlet heat exchange liquid pipe; one end of the inlet heat exchange liquid pipe is provided with an inlet liquid collector, behind the inlet liquid collector, there is a heat exchange tube bundle, the other end of the heat exchange tube bundle is connected to an outlet liquid collector, the outlet liquid collector is connected to the outlet heat exchange liquid pipe, fins are arranged outside the heat exchange tube bundle, and a scale removal mechanism is arranged inside the inlet heat exchange liquid pipe and the outlet heat exchange liquid pipe;

[0007] The scale removal mechanism includes a power supply, a PLC controller, an electric control switch A, an electrode A, and an electrode B; the power supply is fixed on the inner wall of the shell, both ends of the power supply are connected with an electrode A and an electrode B through wires, the power supply is connected with the PLC controller, the PLC controller is fixed on the outer wall of the shell, the PLC controller is connected with the electric control switch A, and the electric control switch A is arranged on the wire connecting the power supply with the electrode A and the electrode B.

[0008] Preferably, the output end of the power supply is connected with a current commutator, the current commutator is electrically connected with the PLC controller, and the output end of the current commutator is connected to the electrode A and the electrode B.

[0009] Preferably, in the present utility model, the electrode A is fixed on the inner wall of the inlet heat exchange liquid pipe, and the electrode B is fixed on the inner wall of the outlet heat exchange liquid pipe.

[0010] Preferably, in the present utility model, the current commutator is composed of an electric control switch B, an electric control switch C, an electric control switch D, and an electric control switch E, and the electric control switch B, the electric control switch C, the electric control switch D, and the electric control switch E are electrically connected to the PLC controller. The positive pole of the power supply is connected to the electric control switch B and the electric control switch C, and the negative pole of the power supply is connected to the electric control switch D and the electric control switch E.

[0011] Preferably, in the present utility model, a filter screen is provided at the front end of the inlet heat exchange liquid pipe.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. By installing a descaling mechanism in the inlet heat exchange liquid pipe and the outlet heat exchange liquid pipe, the PLC controller controls the electric control switch A to connect the electrode A and the electrode B to be energized, electrolyze the scale accumulated in the inlet heat exchange liquid pipe and the outlet heat exchange liquid pipe, and discharge the scale mixed in the heat exchange liquid after removal, keeping the inside of the heat exchanger unobstructed and improving the heat exchange efficiency.

[0014] 2. By installing a current commutator at the power output end, the PLC controller 802 controls the electric control switch B and the electric control switch D in the current commutator to be closed, and the electric control switch C and the electric control switch E to be disconnected, so that the scale decomposes and accumulates on the electrode A. After a certain time, the PLC controller controls the electric control switch B and the electric control switch D to be disconnected, and the electric control switch C and the electric control switch E to be closed, reversing the direction of the current output by the power supply, so that the scale accumulated on the electrode A decomposes again and flows to the electrode B. During this process, the scale is mixed in the heat exchange liquid and discharged. Repeating this process multiple times removes the scale in the pipe network of the heat exchanger. Description of the Drawings

[0015] Figure 1 It is a schematic overall planar structure diagram of the present utility model;

[0016] Figure 2 It is a schematic planar structure diagram at the inlet liquid collector of the present utility model;

[0017] Figure 3 It is a schematic structure diagram of the descaling mechanism of the present utility model;

[0018] Figure 4 It is a schematic structure diagram of the current commutator of the present utility model.

[0019] In the figure: 1. housing; 2. inlet heat exchange liquid pipe; 3. outlet heat exchange liquid pipe; 4. inlet liquid header; 5. heat exchange tube bundle; 6. outlet liquid header; 7. fin; 8. descaling mechanism; 801. power supply; 802. PLC controller; 803. electric control switch A; 804. electrode A; 805. electrode B; 806. current commutator; 8061. electric control switch B; 8062. electric control switch C; 8063. electric control switch D; 8064. electric control switch E; 9. filter screen. Specific implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figure 1 As shown in the figure, the present invention provides a finned heat exchanger capable of automatically removing scale, including a housing 1, an inlet heat exchange liquid pipe 2 and an outlet heat exchange liquid pipe 3 are arranged on one side of the housing 1; one end of the inlet heat exchange liquid pipe 2 is provided with an inlet liquid header 4, a heat exchange tube bundle 5 is arranged behind the inlet liquid header 4, the other end of the heat exchange tube bundle 5 is connected to an outlet liquid header 6, the outlet liquid header 6 is connected to the outlet heat exchange liquid pipe 3, fins 7 are arranged outside the heat exchange tube bundle 5, and a descaling mechanism 8 is arranged in the inlet heat exchange liquid pipe 2 and the outlet heat exchange liquid pipe 3.

[0022] Referring to the figure, the descaling mechanism 8 includes a power supply 801, a PLC controller 802, an electric control switch A 803, an electrode A 804 and an electrode B 805; the power supply 801 is fixed on the inner wall of the housing 1, both ends of the power supply 801 are connected with an electrode A 804 and an electrode B 805 through wires, the power supply 801 is connected with a PLC controller 802, the PLC controller 802 is fixed on the outer wall of the housing 1, the PLC controller 802 is connected with an electric control switch A 803, and the electric control switch A 803 is arranged on the wire connecting the power supply 801 with the electrode A 804 and the electrode B 805.

[0023] By installing the descaling mechanism 8 in the inlet heat exchange liquid pipe 2 and the outlet heat exchange liquid pipe 3, the PLC controller 802 controls the electric control switch A 803 to connect the electrode A 804 and the electrode B 805 to be energized, electrolyze the scale accumulated in the inlet heat exchange liquid pipe 2 and the outlet heat exchange liquid pipe 3, discharge the removed scale mixed in the heat exchange liquid, keep the inside of the heat exchanger unblocked, and improve the heat exchange efficiency.

[0024] Referring to the figure, the output terminal of the power supply 801 is connected to a current commutator 806. The current commutator 806 is electrically connected to the PLC controller 802. The output terminal of the current commutator 806 is connected to the electrode A 804 and the electrode B 805. The current commutator 806 is composed of an electric control switch B 8061, an electric control switch C 8062, an electric control switch D 8063, and an electric control switch E 8064. The electric control switch B 8061, the electric control switch C 8062, the electric control switch D 8063, and the electric control switch E 8064 are electrically connected to the PLC controller 802. The positive pole of the power supply 801 is connected to the electric control switch B 8061 and the electric control switch C 8062, and the negative pole of the power supply 801 is connected to the electric control switch D 8063 and the electric control switch E 8064.

[0025] By installing the current commutator 806 at the output terminal of the power supply 801, the PLC controller 802 controls the electric control switch B 8061 and the electric control switch D 8063 in the current commutator 806 to be closed, and the electric control switch C 8062 and the electric control switch E 8064 to be opened, so that the scale decomposes and accumulates on the electrode A 804. After a certain period of time, the PLC controller 802 controls the electric control switch B 8061 and the electric control switch D 8063 to be opened, and the electric control switch C 8062 and the electric control switch E 8064 to be closed, reversing the direction of the current output by the power supply 801, so that the scale accumulated on the electrode A 804 decomposes again and flows to the electrode B 805. In this process, the scale is mixed in the heat exchange fluid and discharged. Repeating this process multiple times removes the scale in the inner pipe network of the heat exchanger.

[0026] Usage method

[0027] The working principle and usage process of the present utility model: After scale is deposited in the finned heat exchanger, the PLC controller 802 is started. The PLC controller 802 controls the electric control switch A 803, and at the same time controls the electric control switch B 8061 and the electric control switch D 8063 to be closed, and the electric control switch C 8062 and the electric control switch E 8064 to be opened, connecting the electrode A 804 and the electrode B 805 to be energized, electrolyzing the scale accumulated in the inlet heat exchange fluid pipe 2 and the outlet heat exchange fluid pipe 3. After the scale decomposes, it accumulates on the electrode A 804. After electrolyzing for a period of time, the PLC controller 802 controls the electric control switch B 8061 and the electric control switch D 8063 to be opened, and the electric control switch C 8062 and the electric control switch E 8064 to be closed, reversing the direction of the current output by the power supply 801, so that the scale accumulated on the electrode A 804 decomposes again and flows to the electrode B 805. In this process, the scale is mixed in the heat exchange fluid and discharged. Repeating this process multiple times removes the scale in the inner pipe network of the heat exchanger, keeping the inside of the heat exchanger unobstructed and improving the heat exchange efficiency.

[0028] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A finned heat exchanger capable of automatically removing scale, comprising a housing (1), characterized in that: On one side of the housing (1), an inlet heat exchange liquid pipe (2) and an outlet heat exchange liquid pipe (3) are provided; one end of the inlet heat exchange liquid pipe (2) is provided with an inlet liquid header (4), behind the inlet liquid header (4) there is a heat exchange tube bundle (5), the other end of the heat exchange tube bundle (5) is connected to an outlet liquid header (6), the outlet liquid header (6) is connected to the outlet heat exchange liquid pipe (3), fins (7) are arranged outside the heat exchange tube bundle (5), and a descaling mechanism (8) is arranged in the inlet heat exchange liquid pipe (2) and the outlet heat exchange liquid pipe (3); The descaling mechanism (8) includes a power supply (801), a PLC controller (802), an electric control switch A (803), an electrode A (804) and an electrode B (805); the power supply (801) is fixed on the inner wall of the housing (1), both ends of the power supply (801) are connected with the electrode A (804) and the electrode B (805) through wires, the power supply (801) is connected with the PLC controller (802), the PLC controller (802) is fixed on the outer wall of the housing (1), the PLC controller (802) is connected with the electric control switch A (803), and the electric control switch A (803) is arranged on the wire connecting the power supply (801) with the electrode A (804) and the electrode B (805).

2. The finned heat exchanger capable of automatically removing scale according to claim 1, wherein: The output end of the power supply (801) is connected with a current commutator (806), the current commutator (806) is electrically connected with the PLC controller (802), and the output end of the current commutator (806) is connected to the electrode A (804) and the electrode B (805).

3. The finned heat exchanger capable of automatically removing scale according to claim 1, wherein: The electrode A (804) is fixed on the inner wall of the inlet heat exchange liquid pipe (2), and the electrode B (805) is fixed on the inner wall of the outlet heat exchange liquid pipe (3).

4. The finned heat exchanger capable of automatically removing scale according to claim 2, wherein: The current commutator (806) is composed of an electric control switch B (8061), an electric control switch C (8062), an electric control switch D (8063) and an electric control switch E (8064), and the electric control switch B (8061), the electric control switch C (8062), the electric control switch D (8063) and the electric control switch E (8064) are electrically connected with the PLC controller (802), the positive pole of the power supply (801) is connected with the electric control switch B (8061) and the electric control switch C (8062), and the negative pole of the power supply (801) is connected with the electric control switch D (8063) and the electric control switch E (8064).

5. The finned heat exchanger capable of automatically removing scale according to claim 1, wherein: A filter screen (9) is arranged at the front end of the inlet heat exchange liquid pipe (2).

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