Multifunctional integrated heat exchanger based on sound elimination principle

Abstract

The application discloses a multifunctional integrated heat exchanger based on the sound elimination principle, which comprises a heat exchanger, one end of the heat exchanger is provided with an inlet end head, and the other end of the heat exchanger is provided with an outlet end head; an inlet pipe connection for the entry of seawater is arranged on the inlet end head, the outlet end head is connected with a pump, and the outlet of the pump is provided with an outlet pipe for the discharge of seawater; a filter is arranged between the heat exchanger and the inlet end head, a cavity is reserved between the filter and the heat exchanger, and a gas bag sound elimination assembly is arranged on the inner wall of the outlet end head. According to the sound elimination principle, the multifunctional integrated heat exchanger based on the sound elimination principle realizes the organic unification of the sound elimination, filtration, heat exchange and pumping functions through the integration of the filter, the heat exchanger, the sound eliminator and the pump.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat exchangers, and particularly relates to a multifunctional integrated heat exchanger based on a sound elimination principle. BACKGROUND

[0002] With the continuous development of equipment technology, the vibration and noise reduction technology is paid more and more attention as a key indicator for improving the sound stealth performance of a ship. The seawater pipeline is an important seawater pipeline system of a ship, and is an important aspect of the ship to generate underwater noise. The flow noise in the pipeline can be radiated outward through the pipeline wall or directly radiated into the water at the inlet and outlet, so that the entire ship forms a large radiator, which greatly reduces the stealth performance and safety of the ship. The most commonly used method for controlling pressure pulsation in the seawater pipeline is to install a seawater silencer in the pipeline to attenuate the pressure pulsation and thus control the pipe outlet radiation noise. Therefore, the control of the pipe outlet radiation noise of the seawater pipeline is particularly important. In addition, with the improvement of the function and performance requirements of the ship, the integration of the ship equipment has gradually become the focus of attention of equipment manufacturers.

[0003] At present, the silencers can be divided into resistive silencers, reactive silencers, impedance composite silencers and air bag type silencers. The seawater silencer of the seawater pipeline mainly adopts the annular air bag type seawater silencer. This type of seawater silencer has the advantages of compact structure, good silencing effect and wide spectrum, and can be installed before and after the seawater pump to control the propagation of the pressure pulsation caused by the seawater pump and the valve along the upstream and downstream. In order to achieve good silencing effect, the reactive or resistive silencer needs a larger size or a larger resistance, so in general, the pure reactive or resistive silencer is not suitable for the space-constrained ship environment.

[0004] The equipment of the ship seawater pipeline from the side inlet to the side outlet is in turn a side valve, a ball valve, a silencer, a seawater filter, a seawater pump, a silencer, a heat exchanger, other equipment, a ball valve and a side valve. These devices occupy a large amount of space on the ship, which causes great problems in cabin arrangement and subsequent operation and maintenance. The ship heat exchanger generally adopts a shell-and-tube heat exchanger, which has a head with a large cavity and has the ability to integrate other equipment. The seawater filter has a certain requirement for the expansion ratio of the shell, which is basically consistent with 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, the pressure pulsation magnitude of the seawater is reduced due to the resistive effect of the heat exchange tube, which has a certain silencing effect. Moreover, when the shell-and-tube heat exchanger is located at the inlet of the pump, the pressure pulsation magnitude of the inlet seawater is reduced, and the corresponding pressure pulsation magnitude after the pump is also reduced. However, the existing seawater pipeline system has each device performing its own function, and the functions of the system devices are independent of each other, which occupies a large amount of cabin space, causes high radiation noise, and causes performance indicators to be offset and wasted. SUMMARY

[0005] The present application aims to solve the above-mentioned problems in the background art, and provides a multifunctional integrated heat exchanger based on the principle of sound elimination.

[0006] To achieve the above-mentioned purposes, the present application provides a multifunctional integrated heat exchanger based on the principle of sound elimination, which comprises 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; an inlet pipe connection for the entry of seawater is arranged on the inlet head, the outlet head is connected with a pump, and the outlet of the pump is provided with an outlet pipe for the discharge of seawater; a filter is arranged between the heat exchanger and the inlet head, and a cavity is reserved between the filter and the heat exchanger; a gas bag sound elimination assembly is arranged on the inner wall of the outlet head.

[0007] After the pump is started, the seawater enters the inlet head for the first time and is expanded for sound elimination; then, the seawater enters the cavity for the second time and is expanded for sound elimination after passing through the filter; finally, the seawater enters the outlet head for the third time and is expanded for sound elimination after passing through the heat exchanger, and the pressure pulsation is eliminated by the gas bag sound elimination assembly, and then the seawater is discharged by the outlet pipe after being pressurized by the pump.

[0008] Further, the heat exchanger comprises a heat exchanger shell and a heat exchanger tube bundle, the heat exchanger tube bundle is arranged in the inner cavity of the heat exchanger shell, and the end of the heat exchanger shell is provided with a heat exchanger end plate.

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

[0010] Further, a plurality of flow guide cylinders are arranged above the heat exchanger shell, a hot fluid inlet is arranged above the flow guide cylinders, and a hot fluid outlet is arranged below the heat exchanger shell.

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

[0012] Further, a perforated mesh plate is arranged in the outlet head, and the gas bag sound elimination assembly is arranged in the space formed between the inner wall of the outlet head and the perforated mesh plate.

[0013] Further, the gas bag sound elimination assembly comprises an annular gas bag, and the annular gas bag is provided with a gas bag inflation port.

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

[0015] Further, the filter adopts a wedge-shaped basket filter.

[0016] Further, 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 application has the following beneficial effects:

[0018] Firstly, the multifunctional integrated heat exchanger based on the sound elimination principle realizes the organic unity of sound elimination, filtration, heat exchange and pumping through the integration of the filter, the heat exchanger, the sound eliminator and the pump according to the impedance complexing and airbag sound elimination principle.

[0019] Secondly, the multifunctional integrated heat exchanger based on the sound elimination principle has the characteristics of high integration degree, can replace multiple cumbersome split devices, reduces the space occupation, has great significance for the ship cabin with relatively tight space, and helps to save energy consumption and reduce vibration and noise.

[0020] Thirdly, the multifunctional integrated heat exchanger based on the sound elimination principle has good sound elimination effect by reasonably arranging the filter, the heat exchanger and the sound eliminator to form multiple impedance complexing and sound elimination units.

[0021] Fourthly, the filter is arranged at the heat exchanger inlet head, so that the seawater entering the heat exchanger is further filtered, the cleanliness of the heat exchange tube bundle is guaranteed, and the heat exchange efficiency is improved.

[0022] Fifthly, in order to prevent the excessive pump front resistance, in addition to the wedge-shaped basket filter with small noise and pressure loss, a pressure detection device is also provided, and after the pressure exceeds the set value, maintenance and cleaning are carried out, so as to guarantee the power performance of the pump.

[0023] Sixthly, the functions of the modules of the application promote each other, form an organic unity, improve the service life of the equipment, and greatly reduce the pressure pulsation level of the equipment, and greatly improve the acoustic stealth performance of the ship. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of a multifunctional integrated heat exchanger based on the sound elimination principle.

[0025] Figure 2 It is a schematic view for expanding the influence of the transmission loss;

[0026] In the figure, heat exchanger 1, heat exchanger shell 101, heat exchanger tube bundle 102, heat exchanger end plate 103, heat exchanger 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, air bag muffling assembly 9, annular air bag 901, air bag inflation port 902, flow guide cylinder 10, hot fluid inlet 11, hot fluid outlet 12, pressure gauge 13, filter cover 14, perforated mesh 15. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation of the present application, and is only exemplary. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. It will become more apparent and easier to understand through the description of the advantages of the present application.

[0028] As shown in Figure 1 A multifunctional integrated heat exchanger based on the principle of muffling according to the present application, comprising a heat exchanger 1, one end of the heat exchanger 1 is provided with an inlet head 2, 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 connected for seawater to enter, the outlet head 3 is connected with a pump 5, 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, a cavity 8 is reserved between the filter 7 and the heat exchanger 1; an air bag muffling 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, the seawater enters low and discharges high, preventing cavitation of the integrated pump unit.

[0029] When the pump 5 is started, the seawater enters the inlet head 2 after the first sudden expansion of the space for the first time, and the first muffling expansion eliminates part of the pressure pulsation; then, the seawater enters the cavity 8 for the second time 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 time after being further rectified by the heat exchanger 1, again eliminating part of the magnitude of the pressure pulsation, and then being eliminated by the air bag muffling assembly 9 before being discharged by the outlet pipe 6 after being pressurized by the pump 5. 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 stroke, thereby preventing cavitation and further improving the reliability of the equipment.

[0030] The heat exchanger 1 comprises a heat exchanger shell 101 and a heat exchanger tube bundle 102, the heat exchanger tube bundle 102 is arranged in the inner cavity of the heat exchanger shell 101, and the end of the heat exchanger shell 101 is provided with a heat exchanger end plate 103. The inner cavity of the heat exchanger shell 101 is provided with a heat exchanger tube support plate 104 for supporting the heat exchanger tube bundle 102, and the bottom of the heat exchanger shell 101 is provided with a heat exchanger base 105. The upper portion of the heat exchanger shell 101 is provided with a plurality of flow guide cylinders 10, the upper portion of the flow guide cylinder 10 is provided with a hot fluid inlet 11, and the lower portion of the heat exchanger shell 101 is provided with a hot fluid outlet 12. The hot fluid inlet of the heat exchanger is provided with a flow guide cylinder, which can ensure heat exchange while avoiding fatigue fracture of the heat exchanger tube due to excessive vibration.

[0031] The cavity 8 between the filter 7 and the heat exchanger 1 is provided with a pressure gauge 13, and the cleaning period of the filter can be determined according to whether the observed pressure value exceeds the set pressure; the upper portion of the filter 7 is provided with a filter cover 14. The filter is of a grid structure, and the heat exchanger tube bundle is similar to a honeycomb structure, both of which have certain resistance and noise reduction effects. In the embodiment, the filter 7 adopts a wedge-shaped basket filter, which reduces pressure loss and facilitates maintenance.

[0032] The outlet head 3 is provided with a perforated mesh plate 15, and the air bag noise reduction assembly 9 is arranged in the space formed between the inner wall of the outlet head 3 and the perforated mesh plate 15. The air bag noise reduction assembly 9 comprises an annular air bag 901, and the annular air bag 901 is provided with an air bag inflation port 902.

[0033] The use method of the multifunctional integrated heat exchanger based on the noise reduction principle of the application:

[0034] The seawater enters the inlet head 2 through the inlet pipe 4, enters the filter 7 after the inlet head 2, and since the heat exchanger end plate 103 separates the cold and hot fluids, the seawater can only pass through the heat exchanger tube bundle 102 of the heat exchanger 1 to enter the outlet head 3, and further eliminate the pressure pulsation through the air bag noise reduction assembly 9, and then enter the inlet pipe section of the pump 5, and then be pressurized by the pump 5 and discharged through the discharge outlet pipe. The hot fluid enters the heat exchanger through the hot fluid inlet 11, is guided by the flow guide cylinder 10, uniformly impacts the heat exchanger tube bundle, and is fully heat-exchanged with the cold fluid seawater, and is then discharged through the hot fluid outlet 12.

[0035] The resistance muffler utilizes the sudden expansion and sudden contraction, side branch pipe and perforated pipe structure at the pipe cross section to produce the mismatch of cross section impedance, so that the sound wave is reflected back, thereby achieving the effect of reducing the output noise. The transmission loss of the expansion cavity muffler is derived by using the transfer matrix method as follows:

[0036]

[0037] In the formula, m is the expansion ratio, l is the effective length of the expansion cavity, and k is the wave number. For example, Figure 2The influence of expansion ratio on transmission loss is shown, and it can be seen that the greater the expansion ratio, the better the sound attenuation effect. The resistive muffler generally has good performance in the low frequency band, and the sound attenuation band is not wide. The resistive muffler has good sound attenuation effect in a wide middle-high frequency band.

[0038] The multifunctional integrated heat exchanger based on the sound attenuation principle of the application integrates the functions of pump, heat exchanger, muffler and filter. The sound attenuation performance is assisted by the resistive muffling unit formed by the series connection of multiple sound attenuation expansion cavities and the filter and heat exchanger rectification resistive muffling unit in addition to the sound attenuation components. At the same time, the space occupation can be greatly reduced, the fluid noise can be reduced, and the stealth performance of the ship can be ensured.

[0039] The above is only a specific embodiment of the application, but the protection scope of the application is not limited to this. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed by the application should be covered within the protection scope of the application. The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

Claims

1. A multifunctional integrated heat exchanger based on the principle of silencing, characterized by: 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 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 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; then, 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), wherein 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 provided 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 provided above the heat exchanger shell (101), a hot fluid inlet (11) is provided above the flow guide cylinders (10), and a hot fluid outlet (12) is provided 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 provided on the cavity (8) between the filter (7) and the heat exchanger (1); and a filter cover (14) is provided 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 provided in the outlet seal head (3), and the airbag silencer assembly (9) is provided 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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