Multifunctional integrated heat exchanger based on silencing principle

Abstract

The multifunctional integrated heat exchanger based on the silencing principle comprises a heat exchanger body, an inlet end socket is arranged at one end of the heat exchanger body, and an outlet end socket is arranged at the other end of the heat exchanger body; the inlet seal head is provided with an inlet pipe for seawater to enter, the outlet seal head is connected with a pump, and an outlet of the pump is provided with an outlet pipe for seawater to be discharged; a filter is arranged between the heat exchanger and the inlet seal head, and a cavity is reserved between the filter and the heat exchanger; an air bag silencing assembly is arranged on the inner wall of the outlet end socket. According to the multifunctional integrated heat exchanger based on the noise elimination principle, organic unification of multiple functions of noise elimination, filtering, heat exchange and pumping is achieved through the integrated filter, the heat exchanger, the silencer and the pump according to the impedance compounding and air bag noise elimination principle.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchangers, and in particular relates to a multifunctional integrated heat exchanger based on the muffler principle. Background Art

[0002] With the continuous development of equipment technology, vibration reduction and noise reduction technology has received more and more attention as a key indicator for improving the acoustic stealth performance of ships. As an important sea-going pipeline system for ships, seawater pipelines are an important aspect of underwater noise generated by ships. The flow noise in the pipeline can radiate outward through the pipe wall or even directly into the water at the inlet and outlet, making the entire ship a large radiator, which greatly reduces the stealth performance and safety of the ship. The most common method for controlling pressure pulsation in seawater pipelines is to install seawater silencers in the pipelines to attenuate the pressure pulsation and thus control the radiated noise from the pipe mouth. Therefore, it is particularly important to control the radiated noise from the pipe mouth of the sea-going pipeline. In addition, with the improvement of ship functions and performance requirements, the integration of ship equipment has gradually become a focus of attention for various equipment manufacturers.

[0003] At present, silencers can be divided into resistive silencers, reactive silencers, impedance composite silencers and airbag silencers. At present, the silencers for sea-going pipelines mainly adopt annular airbag water silencers. This type of seawater silencer has the advantages of compact structure, good noise reduction effect and broad spectrum. It can be installed before and after the seawater pump to control the propagation of pressure pulsation caused by the seawater pump and valve along the upstream and downstream. However, in order to achieve a good noise reduction effect, the reactive or resistive silencer needs to be larger in size or have greater resistance. Therefore, in general, a simple reactive or resistive silencer is not suitable for use in a ship environment with tight space.

[0004] The equipment of the ship's sea-going pipeline from the side inlet to the side outlet is the side valve, ball valve, muffler, seawater filter, seawater pump, muffler, heat exchanger, other equipment, ball valve, and side valve. These equipment occupy a lot of space on the ship, resulting in major problems in cabin layout and subsequent operation and maintenance. Marine heat exchangers generally use shell and tube heat exchangers, which have heads with large cavities and have the ability to integrate the functions of other equipment. The seawater filter has certain requirements for the expansion ratio of the shell, which is basically the same as the expansion ratio of the head of the shell and tube heat exchanger. In addition, when seawater flows in the heat exchange tube of the shell and tube heat exchanger, due to the resistance of the heat exchange tube, the pressure pulsation level of seawater is reduced, which has a certain muffler effect. Moreover, when the shell and tube heat exchanger is located at the inlet of the pump, due to the reduction of the pressure pulsation level of the inlet seawater, the corresponding pressure pulsation level after the pump will also be reduced. However, in the existing sea-going pipeline system, each device performs its own function, and the functions of the system equipment are independent of each other, which occupies a large amount of cabin space, resulting in high radiation noise and performance indicators being offset and wasted. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a multifunctional integrated heat exchanger based on the silencer principle. The present invention saves a lot of space and weight of the sea pipeline system by integrating pumps, silencers, filters and other equipment, and the performance indicators of each device promote each other, reducing the noise source level of the equipment, facilitating equipment layout and subsequent maintenance.

[0006] To achieve the above-mentioned purpose, the present invention provides a multifunctional integrated heat exchanger based on the muffler principle, comprising a heat exchanger, one end of the heat exchanger is provided with an inlet head, and the other end of the heat exchanger is provided with an outlet head; the inlet head is provided with an inlet pipe connection for seawater to enter, the outlet head is connected to a pump, and the outlet of the pump is provided with an outlet pipe for seawater to discharge; a filter is provided between the heat exchanger and the inlet head, and a cavity is reserved between the filter and the heat exchanger; an airbag muffler assembly is provided on the inner wall of the outlet head;

[0007] After the pump is started, the seawater enters the inlet head through the inlet pipe and undergoes the first silencing expansion; then, the seawater enters the cavity through the filter and undergoes the second silencing expansion; finally, the seawater enters the outlet head through the heat exchanger and undergoes the third silencing expansion, and after the pressure pulsation is eliminated by the airbag silencing component, it is pressurized by the pump and discharged from the outlet pipe.

[0008] Furthermore, the heat exchanger comprises a heat exchanger shell and a heat exchange tube bundle, the heat exchange tube bundle is arranged in the inner cavity of the heat exchanger shell, and a heat exchanger end plate is arranged at the end of the heat exchanger shell.

[0009] Furthermore, a heat exchange tube support plate for supporting the heat exchange tube bundle is provided in the inner cavity of the heat exchanger shell, and a heat exchanger base is provided at the bottom of the heat exchanger shell.

[0010] Furthermore, a plurality of guide tubes are arranged above the heat exchanger shell, a hot fluid inlet is arranged above the guide tube, and a hot fluid outlet is arranged below the heat exchanger shell.

[0011] Furthermore, a pressure measuring device is arranged on the cavity between the filter and the heat exchanger; and a filter cover is arranged above the filter.

[0012] Furthermore, a perforated mesh plate is arranged in the outlet seal head, and the airbag silencer assembly is arranged in a space formed between the inner wall of the outlet seal head and the perforated mesh plate.

[0013] Furthermore, the airbag silencer assembly includes an annular airbag, and an airbag inflation port is provided on the annular airbag.

[0014] Furthermore, the pump is a positive displacement pump or a centrifugal pump.

[0015] Furthermore, the filter is a wedge-shaped basket filter.

[0016] Furthermore, the water outlet height of the outlet pipe is greater than the water inlet height of the inlet pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Firstly, the multifunctional integrated heat exchanger based on the muffler principle of the present invention realizes the organic unity of muffler, filtration, heat exchange and pumping by integrating a filter, a heat exchanger, a muffler and a pump according to the impedance composite and airbag muffler principles.

[0019] Secondly, the multifunctional integrated heat exchanger based on the muffler principle of the present invention has the characteristics of high integration, and can replace a plurality of bulky split devices, thereby reducing space occupancy. It is of great significance for ship cabins with relatively tight space, and helps to save energy and reduce vibration and noise.

[0020] Thirdly, the multifunctional integrated heat exchanger based on the muffler principle of the present invention forms a plurality of impedance complex and muffler units by reasonably arranging filters, heat exchangers and mufflers, and has a good muffler effect.

[0021] Fourthly, the present invention arranges the filter at the inlet head of the heat exchanger, so that the seawater entering the heat exchanger can be further filtered, thereby ensuring the cleanliness of the heat exchange tube bundle and facilitating improving the heat exchange efficiency.

[0022] Fifthly, in order to prevent excessive resistance before the pump, the present invention, in addition to adopting a wedge-shaped basket filter with low noise and pressure loss, is also equipped with a pressure detection device. After the pressure exceeds the set value, maintenance and cleaning are performed to ensure the dynamic performance of the pump.

[0023] Sixthly, the functions of the various modules of the present invention promote each other, forming an organic unity, thereby increasing the service life of the equipment. At the same time, the pressure pulsation level of the equipment is greatly reduced, thereby greatly improving the acoustic stealth performance of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a multifunctional integrated heat exchanger based on the principle of silencing;

[0025] Figure 2 Schematic diagram of the effect of expansion ratio on transmission loss;

[0026] In the figure, heat exchanger 1, heat exchanger shell 101, heat exchange tube bundle 102, heat exchanger end plate 103, heat exchange tube support plate 104, heat exchanger base 105, inlet head 2, outlet head 3, inlet pipe 4, pump 5, outlet pipe 6, filter 7, cavity 8, airbag silencer assembly 9, annular airbag 901, airbag inflation port 902, guide tube 10, hot fluid inlet 11, hot fluid outlet 12, pressure gauge 13, filter cover 14, and perforated mesh plate 15. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention, and is only used as an example. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. At the same time, the advantages of the present invention will become clearer and easier to understand by explaining.

[0028] like Figure 1 As shown, a multifunctional integrated heat exchanger based on the muffler principle of the present invention comprises a heat exchanger 1, one end of the heat exchanger 1 is provided with an inlet head 2, and the other end of the heat exchanger 1 is provided with an outlet head 3; the inlet head 2 is provided with an inlet pipe 4 for seawater to enter, the outlet head 3 is connected to a pump 5, and the outlet of the pump 5 is provided with an outlet pipe 6 for seawater to discharge; a filter 7 is provided between the heat exchanger 1 and the inlet head 2, and a cavity 8 is reserved between the filter 7 and the heat exchanger 1; an airbag muffler assembly 9 is provided on the inner wall of the outlet head 3; the water outlet height of the outlet pipe 6 is greater than the water inlet height of the inlet pipe 4, and the seawater enters at a low level and exits at a high level, thereby preventing cavitation of the integrated pump unit.

[0029] When the pump 5 is started, the space of the seawater after entering the inlet head 2 from the inlet pipe 4 suddenly expands for the first time to eliminate some pressure pulsation; then, the seawater enters the cavity 8 for the second silencing expansion after being rectified by the filter 7, further eliminating the magnitude of the pressure pulsation; finally, the seawater enters the outlet head 3 for the third silencing expansion after further rectification by the heat exchanger 1, again eliminating some of the magnitude of the pressure pulsation, and after the pressure pulsation is eliminated by the airbag silencing component 9, it is pressurized by the pump 5 and discharged from the outlet pipe 6. The pump 5 adopts a positive displacement pump or a centrifugal pump, and the pump adopts a positive displacement pump or a centrifugal pump with a large suction range, so as to prevent cavitation and further improve the reliability of the equipment.

[0030] The heat exchanger 1 includes a heat exchanger shell 101 and a heat exchange tube bundle 102. The heat exchange tube bundle 102 is arranged in the inner cavity of the heat exchanger shell 101, and a heat exchanger end plate 103 is arranged at the end of the heat exchanger shell 101. The inner cavity of the heat exchanger shell 101 is provided with a heat exchange tube support plate 104 for supporting the heat exchange tube bundle 102, and the bottom of the heat exchanger shell 101 is provided with a heat exchanger base 105. A plurality of guide tubes 10 are arranged above the heat exchanger shell 101, and a hot fluid inlet 11 is arranged above the guide tube 10, and a hot fluid outlet 12 is arranged below the heat exchanger shell 101. The hot fluid inlet of the heat exchanger is equipped with a guide tube to ensure heat exchange while avoiding fatigue fracture of the heat exchange tube due to excessive vibration.

[0031] A pressure gauge 13 is provided on the cavity 8 between the filter 7 and the heat exchanger 1, and the cleaning cycle of the filter can be determined by observing whether the pressure value exceeds the set pressure; a filter cover 14 is provided above the filter 7. The filter is a grid structure, and the heat exchange tube bundle is similar to a honeycomb structure, both of which have a certain resistive noise reduction effect. In this embodiment, the filter 7 adopts a wedge-shaped basket filter to reduce pressure loss and facilitate maintenance.

[0032] A perforated mesh plate 15 is provided in the outlet end cap 3, and the airbag muffler assembly 9 is provided in the space formed between the inner wall of the outlet end cap 3 and the perforated mesh plate 15. The airbag muffler assembly 9 includes an annular airbag 901, and an airbag inflation port 902 is provided on the annular airbag 901.

[0033] The method for using the multifunctional integrated heat exchanger based on the muffler principle of the present invention is as follows:

[0034] Seawater enters the inlet head 2 through the inlet pipe 4, and then enters the filter 7 after passing through the inlet head 2. Since the heat exchanger end plate 103 separates the cold and hot fluids, seawater can only enter the outlet head 3 through the heat exchange tube bundle 102 of the heat exchanger 1, and enters the inlet pipe section of the pump 5 after further eliminating the pressure pulsation through the airbag silencer component 9, and then passes through the discharge outlet pipe after being pressurized by the pump 5. The hot fluid enters the heat exchanger through the hot fluid inlet 11, and after being guided by the guide tube 10, it evenly impacts the heat exchange tube bundle, and after fully exchanging heat with the cold fluid seawater, it is discharged through the hot fluid outlet 12.

[0035] The reactive muffler uses the structures of sudden expansion and contraction, side branch pipes, perforated pipes, etc. at the pipe cross section to produce the mismatch of cross-sectional impedance and reflect the sound waves back, thereby achieving the effect of reducing the output noise. The transfer loss of the expansion chamber muffler is derived by the transfer matrix method as follows:

[0036]

[0037] Where m is the expansion ratio, l is the effective length of the expansion cavity, and k is the wave number. Figure 2The figure shows the effect of expansion ratio on transmission loss. It can be seen that the larger the expansion ratio, the better the silencing effect. Anti-type silencers generally perform better in low frequency bands and the silencing frequency band is not wide. Resistive silencers have good silencing effects in wider medium and high frequency bands.

[0038] The multifunctional integrated heat exchanger based on the silencer principle of the present invention integrates the functions of a pump, a heat exchanger, a silencer and a filter at the same time. Its silencer performance is improved not only by the silencer assembly, but also by arranging a plurality of silencer expansion chambers in series to form an anti-silencer unit and arranging a filter and a heat exchanger rectifier between the plurality of silencer expansion chambers to assist in noise reduction. At the same time, it can greatly reduce space occupancy, reduce fluid noise, and ensure the stealth performance of the ship.

[0039] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field.

Claims

1. A multifunctional integrated heat exchanger based on the principle of silencing, characterized in that: The invention comprises a heat exchanger (1), wherein one end of the heat exchanger (1) is provided with an inlet head (2), and the other end of the heat exchanger (1) is provided with an outlet head (3); the inlet head (2) is provided with an inlet pipe (4) for seawater to enter, the outlet head (3) is connected to a pump (5), and the outlet of the pump (5) is provided with an outlet pipe (6) for seawater to be discharged; a filter (7) is provided between the heat exchanger (1) and the inlet head (2), and a cavity (8) is reserved between the filter (7) and the heat exchanger (1); an airbag silencer assembly (9) is provided on the inner wall of the outlet head (3); After the pump (5) is started, the seawater enters the inlet head (2) through the inlet pipe (4) and undergoes a first noise reduction expansion; subsequently, the seawater passes through the filter (7) and enters the cavity (8) and undergoes a second noise reduction expansion; finally, the seawater passes through the heat exchanger (1) and enters the outlet head (3) and undergoes a third noise reduction expansion, and after the pressure pulsation is eliminated by the airbag noise reduction component (9), the seawater is pressurized by the pump (5) and discharged from the outlet pipe (6).

2. The multifunctional integrated heat exchanger based on the muffler principle according to claim 1 is characterized in that: The heat exchanger (1) comprises a heat exchanger shell (101) and a heat exchange tube bundle (102); the heat exchange tube bundle (102) is arranged in the inner cavity of the heat exchanger shell (101); and a heat exchanger end plate (103) is arranged at the end of the heat exchanger shell (101).

3. The multifunctional integrated heat exchanger based on the muffler principle according to claim 2 is characterized in that: The inner cavity of the heat exchanger shell (101) is provided with a heat exchange tube support plate (104) for supporting the heat exchange tube bundle (102), and the bottom of the heat exchanger shell (101) is provided with a heat exchanger base (105).

4. The multifunctional integrated heat exchanger based on the muffler principle according to claim 3 is characterized in that: A plurality of flow guide cylinders (10) are arranged above the heat exchanger shell (101), a hot fluid inlet (11) is arranged above the flow guide cylinder (10), and a hot fluid outlet (12) is arranged below the heat exchanger shell (101).

5. The multifunctional integrated heat exchanger based on the muffler principle according to any one of claims 1 to 4, characterized in that: A pressure measuring device (13) is arranged on the cavity (8) between the filter (7) and the heat exchanger (1); and a filter cover (14) is arranged above the filter (7).

6. The multifunctional integrated heat exchanger based on the muffler principle according to any one of claims 1 to 4, characterized in that: A perforated mesh plate (15) is arranged inside the outlet seal head (3), and the airbag silencer assembly (9) is arranged in a space formed between the inner wall of the outlet seal head (3) and the perforated mesh plate (15).

7. The multifunctional integrated heat exchanger based on the muffler principle according to any one of claims 1 to 4, characterized in that: The airbag silencer assembly (9) comprises an annular airbag (901), and an airbag inflation port (902) is provided on the annular airbag (901).

8. The multifunctional integrated heat exchanger based on the muffler principle according to any one of claims 1 to 4, characterized in that: The pump (5) is a positive displacement pump or a centrifugal pump.

9. The multifunctional integrated heat exchanger based on the muffler principle according to any one of claims 1 to 4, characterized in that: The filter (7) is a wedge-shaped basket filter.

10. The multifunctional integrated heat exchanger based on the muffler principle according to any one of claims 1 to 4, characterized in that: The water outlet height of the outlet pipe (6) is greater than the water inlet height of the inlet pipe (4).

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