Heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger which comprises a main pipeline, a gas-liquid phase homogenizing device and a flow dividing device are installed in the inlet end of the main pipeline, the flow dividing device is arranged behind the gas-liquid phase homogenizing device, and the gas-liquid phase homogenizing device is used for conducting gas-liquid homogenizing treatment on fluid entering the main pipeline; the interior of the main pipeline is divided into a plurality of independent fluid channels by the flow dividing device, a plurality of outlets are formed in the side wall of the main pipeline, and each outlet is communicated with one fluid channel; and the multiple branch pipelines are arranged, and all the branch pipelines are connected to the outlets correspondingly. Uniform distribution of gas and liquid is achieved through the gas-liquid phase homogenizing device, then homogenized fluid is evenly distributed into all the fluid channels to flow out through the flow dividing device, in this way, the flow speed of the fluid in all the branch pipelines can be uniform, and the problem that the heat transfer efficiency of all the branch pipelines of the heat exchanger is different due to uneven liquid dividing is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange, in particular to a heat exchanger. BACKGROUND

[0002] With the continuous improvement of industrial production and energy saving and emission reduction requirements, heat exchangers as important heat exchange equipment are widely used in chemical industry, metallurgy, energy and other fields. Multi-branch heat exchanger has been widely used in industrial production due to its compact structure and large heat exchange area.

[0003] However, in the multi-branch heat exchanger of the prior art, the flow distribution of the working medium in the header is often uneven. This uneven distribution can cause obvious differences in the heat transfer efficiency of each branch of the heat exchanger, and some branches may be overheated or insufficient. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides a heat exchanger which can realize uniform flow rate of fluid in each branch pipe and prevent the problem of uneven distribution of heat transfer efficiency of each branch pipe of the heat exchanger.

[0005] A heat exchanger, comprising

[0006] A main pipe, a gas-liquid homogenization device and a flow dividing device are installed inside the inlet end of the main pipe, and the flow dividing device is arranged behind the gas-liquid homogenization device along the overall water flow direction in the main pipe. The gas-liquid homogenization device is used for homogenizing the fluid entering the main pipe, and the flow dividing device divides the main pipe into a plurality of separate fluid channels. A plurality of outlets are arranged on the side wall of the main pipe, and each outlet is connected to one fluid channel.

[0007] A plurality of branch pipes are arranged, and each branch pipe is connected to the outlet.

[0008] In an optional or preferred embodiment, the gas-liquid homogenization device is a capillary tube group.

[0009] In an optional or preferred embodiment, the gas-liquid homogenization device is a nozzle.

[0010] In an optional or preferred embodiment, the gas-liquid homogenization device is a defoaming device, which comprises three layers of defoaming screens, and the density of the three layers of defoaming screens gradually increases along the overall water flow direction in the main pipe.

[0011] In an optional or preferred embodiment, the gas-liquid homogenization device is a spiral impeller.

[0012] In optional or preferred embodiments, the flow splitting device divides the inner portion of the main pipe into four separate fluid passages, and the outlet is provided with four.

[0013] Based on the technical solution, the application has at least the following beneficial effects: the application realizes uniform distribution of gas and liquid through the gas-liquid homogenization device, and then evenly distributes the homogenized fluid into each fluid passage through the flow splitting device, so that the flow rate of the fluid in each branch pipe is uniform, and the problem of heat transfer efficiency difference of each branch pipe of the heat exchanger due to uneven distribution of liquid is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0014] The application will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 is a structural schematic diagram of a heat exchanger of the application embodiment;

[0016] Figure 2 is Figure 1 a structural schematic diagram of a capillary tube group provided in the main pipe of the embodiment shown;

[0017] Figure 3 is Figure 2 a side view of the capillary tube group in the embodiment;

[0018] Figure 4 is Figure 1 a structural schematic diagram of a nozzle provided in the main pipe of the embodiment shown;

[0019] Figure 5 is Figure 1 a structural schematic diagram of a defoaming device provided in the main pipe of the embodiment shown;

[0020] Figure 6 is Figure 1 a structural schematic diagram of a spiral impeller provided in the main pipe of the embodiment shown;

[0021] Figure 7 is Figure 1 a structural schematic diagram of a flow splitting device provided in the main pipe of the embodiment shown. DETAILED DESCRIPTION

[0022] In order for those skilled in the art to better understand the technical solutions in the application, the technical solutions in the application embodiments will be described clearly and completely below in conjunction with the drawings in the application embodiments. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the application.

[0023] The embodiments of the present application will be further described in details below with reference to the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0024] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0026] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] With the continuous improvement of industrial production and energy saving and emission reduction requirements, heat exchangers, as important heat exchange equipment, are widely used in chemical industry, metallurgy, energy and other fields. Multi-branch heat exchangers are widely used in industrial production due to their compact structure and large heat exchange area.

[0028] However, in the multi-branch heat exchanger of the prior art, the flow distribution of the working medium in the header is often uneven. This uneven distribution will cause obvious differences in heat transfer efficiency of each branch of the heat exchanger, and some branches may be overheated or insufficient.

[0029] Reference Figures 1 to 6The application provides a heat exchanger, which comprises a main pipeline 100 and branch pipelines 200.

[0030] The gas-liquid phase homogenization device 300 and the flow splitting device 400 are internally installed at the inlet end of the main pipeline 100. The flow splitting device 400 is arranged behind the gas-liquid phase homogenization device 300 along the overall water flow direction in the main pipeline 100. The gas-liquid phase homogenization device 300 is used for homogenously processing the fluid entering the main pipeline 100. The flow splitting device 400 divides the inside of the main pipeline 100 into a plurality of separate fluid channels. The side wall of the main pipeline 100 is provided with a plurality of outlets, each of which is communicated with one fluid channel. The branch pipelines 200 are provided in plurality, and each branch pipeline 200 is connected at the outlet 101.

[0031] The gas-liquid mixture enters the main pipeline 100, and then is dispersed by the gas-liquid phase homogenization device 300 to form a homogenously two-phase flow. Then, the homogenously two-phase flow is evenly split into the fluid channels by the flow splitting device 400 and flows out from the branch pipelines 200.

[0032] Because the liquid in the gas-liquid mixture receives a large gravity and the gas receives a small gravity, the gas-liquid mixture is inevitably stratified in the flow. In addition, because the liquid has a certain surface tension, the liquid is more easily attached to the pipe wall, which finally leads to uneven distribution of the gas-liquid phase. In addition, because the liquid and the gas have different momentums, the gas has a smaller momentum and is more easily changed in the moving direction. Therefore, the gas flow is high and the liquid flow is low in the branch pipelines close to the main pipeline inlet and the adjacent branch pipelines. However, the gas flow is low and the liquid flow is high in the branch pipelines far from the main pipeline inlet and the adjacent branch pipelines. The application realizes uniform distribution of the gas-liquid by the gas-liquid phase homogenization device 300 and then evenly distributes the homogenized fluid into the fluid channels by the flow splitting device 400, so that the flow rate of the fluid in each branch pipeline 200 is uniform, and the problem of heat transfer efficiency difference of each branch pipeline 200 of the heat exchanger caused by uneven liquid distribution is prevented.

[0033] Referring to Figure 2 , Figure 3 In some embodiments, the gas-liquid phase homogenization device 300 is a capillary tube group 301. The gas-liquid mixture forms a homogenously two-phase flow when passing through the capillary tube group 301.

[0034] Referring to Figure 4 In some embodiments, the gas-liquid phase homogenization device 300 is a nozzle 302. The nozzle 302 sprays the liquid into small droplets suspended in the gas to form a homogenously two-phase flow.

[0035] Referring toFigure 5 In some embodiments, the gas-liquid homogenization device 300 is a defoaming device 303, which includes three layers of defoaming screens with gradually increasing density along the direction of the overall water flow in the main pipe 100. The gas-liquid homogenization is achieved by the three layers of defoaming screens.

[0036] In some embodiments, the gas-liquid homogenization device 300 is a spiral impeller 304. The spiral impeller 304 allows the liquid to be evenly distributed on the inner wall of the main pipe 100 by rotation, while the gas remains in the middle, forming a two-phase flow distribution of liquid ring and gas core. The liquid ring and gas core are evenly distributed to each fluid channel after passing through the flow distribution device 400.

[0037] In some embodiments, the flow distribution device separates the inside of the main pipe 100 into four separate fluid channels, and the outlet 101 is provided with four.

[0038] Referring to Figure 7In some embodiments, the flow distribution device 400 comprises four layers of cross plates and three layers of transverse plates, the four layers of cross plates are arranged in alignment along the length direction of the main pipe 100, the adjacent two layers of cross plates are connected by the transverse plates, each layer of cross plates divides the main pipe 100 into a first sector-shaped cavity, a second sector-shaped cavity, a third sector-shaped cavity and a fourth sector-shaped cavity, the first sector-shaped cavity, the second sector-shaped cavity, the third sector-shaped cavity and the fourth sector-shaped cavity of each layer of cross plates are aligned along the length direction of the main pipe 100, the first sector-shaped cavity on each layer of cross plates communicates an outlet 101, the first layer of transverse plates 150 is provided with a second through hole 151, a third through hole 152 and a fourth through hole 153, wherein the second through hole 151 communicates the fourth sector-shaped cavity of the first layer of cross plates 110 and the fourth sector-shaped cavity of the second layer of cross plates 120, the third through hole 152 communicates the third sector-shaped cavity of the first layer of cross plates 110 and the third sector-shaped cavity of the second layer of cross plates 120, the fourth through hole 153 communicates the second sector-shaped cavity of the first layer of cross plates 110 and the second sector-shaped cavity of the second layer of cross plates 120, the second layer of cross plates 120 is provided with a fifth through hole 121, the fourth sector-shaped cavity of the second layer of cross plates 120 and the first sector-shaped cavity are communicated through the fifth through hole 121, the second layer of transverse plates 160 is provided with a sixth through hole 162 and a seventh through hole 161, the sixth through hole 162 communicates the second sector-shaped cavity of the second layer of cross plates 120 and the second sector-shaped cavity of the third layer of cross plates 130, the seventh through hole 161 communicates the third sector-shaped cavity of the second layer of cross plates 120 and the third sector-shaped cavity of the third layer of cross plates 130, the third layer of cross plates 130 is provided with an eighth through hole 131 and a ninth through hole 132, the eighth through hole 131 communicates the third sector-shaped cavity and the fourth sector-shaped cavity of the third layer of cross plates 130, the ninth through hole 132 communicates the fourth sector-shaped cavity and the first sector-shaped cavity of the third layer of cross plates 130, the third layer of transverse plates 170 is provided with a tenth through hole 171, the tenth through hole 171 communicates the second sector-shaped cavity of the third layer of cross plates 130 and the second sector-shaped cavity of the fourth layer of cross plates 140, the fourth layer of cross plates 140 is provided with an eleventh through hole 141, the eleventh through hole 141 communicates the first sector-shaped cavity and the second sector-shaped cavity of the fourth layer of cross plates 140.

[0039] The homogenized gas-liquid mixture enters the first layer of cross plates 110 and is evenly distributed to the first sector cavity 111, the second sector cavity 112, the third sector cavity 113 and the fourth sector cavity 114 of the first layer of cross plates 110. The gas-liquid mixture entering the first sector cavity of the first layer of cross plates 110 flows out from the corresponding outlet 101. The gas-liquid mixture entering the second sector cavity of the first layer of cross plates 110 flows out from the corresponding outlet 101 after passing through the fourth through hole 153, the sixth through hole 162, the tenth through hole 171 and the eleventh through hole 141. The gas-liquid mixture entering the third sector cavity of the first layer of cross plates 110 flows out from the corresponding outlet 101 after passing through the third through hole 152, the seventh through hole 161, the eighth through hole 131 and the ninth through hole 132. The gas-liquid mixture entering the fourth sector cavity of the first layer of cross plates 110 flows out from the corresponding outlet 101 after passing through the second through hole 151 and the fifth through hole 121.

[0040] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0041] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A heat exchanger, characterized by: The utility model relates to a kind of gas-liquid homogenization device and shunt device for the gas-liquid homogenization device of main pipeline. The utility model relates to a kind of gas-liquid homogenization device and shunt device for the gas-liquid homogenization device of main pipeline. The utility model relates to a kind of gas-liquid homogenization device and shunt device for the gas-liquid homogenization device of main pipeline.

2. The heat exchanger of claim 1, wherein: The utility model relates to a kind of gas-liquid homogenization device and shunt device for the gas-liquid homogenization device of main pipeline.

3. The heat exchanger of claim 1, wherein: The utility model relates to a kind of gas-liquid homogenization device and shunt device for the gas-liquid homogenization device of main pipeline.

4. The heat exchanger of claim 1, wherein: The utility model relates to a kind of gas-liquid homogenization device and shunt device for the gas-liquid homogenization device of main pipeline.

5. The heat exchanger of claim 1, wherein: ​ 6. The heat exchanger of claim 1, wherein: ​

Images