Multi-heat source automatic distribution device and heat exchange system

Abstract

This utility model discloses an automatic distribution device for multiple heat sources, comprising: a vapor-liquid mixing outer cavity with a steam inlet pipe on its outer wall; a water distribution mechanism including a water inlet cover and a water distribution plate; a vapor-liquid mixing floating mechanism including a mixing channel and a steam regulating plate movably mounted on its top; several steam holes are provided on the mixing channel; heat sources entering from the water inlet cover can drive the steam regulating plate downward under pressure, and heat sources entering from the steam inlet pipe can drive the steam regulating plate upward under pressure; and a water distribution mechanism installed inside the vapor-liquid mixing outer cavity and directly below the mixing channel. This utility model utilizes the water inlet cover to enter the liquid, which then reduces the flow rate and is automatically and evenly distributed by the water distribution plate; steam enters from the steam inlet pipe, and the steam regulating plate floats according to the kinetic energy of the steam, thereby controlling the fluid volume and achieving liquid-steam mixing ratio control, thus realizing the automatic distribution of multiple waste heat sources.

Description

Technical Field

[0001] This utility model relates to the field of steam heat pump energy recovery and utilization technology, specifically to an automatic distribution device for multiple heat sources and a heat exchange system. Background Technology

[0002] In industrial production, a large amount of waste heat is emitted without being effectively recovered and utilized. This not only causes a huge waste of energy, but also runs counter to the environmental protection concepts of energy conservation, emission reduction, and green development.

[0003] Currently, various industries are vigorously promoting heat recovery and reuse technologies, but industrial waste heat utilization still faces many challenges. On the one hand, the various types of waste heat generated at different working hours are often handled by configuring separate heat exchangers, which is inefficient. On the other hand, when a single heat source cannot meet the demand, heat exchangers need to be configured separately for multiple heat sources, which undoubtedly increases equipment costs and installation space significantly. Furthermore, there is the problem of insufficient utilization of heat sources, making it difficult to improve energy efficiency and exacerbating energy waste.

[0004] For example, in the prior art of patent number CN215984038U, entitled "Horizontal Shell and Tube Heat Exchanger," it is specifically disclosed that "the shell and tube heat exchanger is provided with flanges at both ends, and the shell and tube heat exchanger is provided with an interface and a liquid outlet. The flange at the interface is connected to the gas phase outlet of the distillation column by bolts, and a gasket is provided at the connection. The liquid outlet is close to the lowest point of the lower head, and the liquid outlet C is connected to an external collector. A first base and a second base are connected to the lower side of the shell and tube heat exchanger. The size of the second base is larger than that of the first base to ensure that the shell and tube heat exchanger has an inclination angle." The above-mentioned heat exchanger can only perform heat exchange for a single heat source at a time, which is inefficient. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to solve the problem of high cost and low heat source recovery efficiency caused by configuring heat exchangers separately for multiple heat sources.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] An automatic heat source distribution device includes:

[0008] The outer wall of the vapor-liquid mixing chamber is provided with a vapor inlet pipe;

[0009] The water inlet distribution mechanism includes a water inlet cover located at the top of the vapor-liquid mixing outer cavity, and a water inlet distribution plate located directly below the water inlet cover;

[0010] A vapor-liquid mixing floating mechanism is installed inside the vapor-liquid mixing outer cavity, specifically including a mixing flow channel and a steam regulating plate movably mounted on its top; several steam holes are opened on the mixing flow channel; a heat source entering from the water inlet cover can drive the steam regulating plate to move downward under pressure, and a heat source entering from the steam inlet pipe can drive the steam regulating plate to float upward under pressure;

[0011] The water flow equalization mechanism is installed inside the vapor-liquid mixing chamber and directly below the mixing channel.

[0012] This invention involves the liquid entering through an inlet cover, which then reduces the flow rate. The liquid is automatically and evenly distributed by an inlet distribution plate, and the reduced flow rate serves as a buffer to prevent the fluid from directly entering the steam-liquid mixing chamber, thus avoiding insufficient mixing with steam and resulting in uneven steam-liquid conditions or large temperature differences. The amount of steam entering is then regulated. Steam enters through an inlet pipe, and a steam regulating plate adjusts the distance between the distribution plate and the steam regulating plate based on the kinetic energy of the steam. This allows for dynamic changes in the fluid within the cavity formed by the inlet distribution plate, the steam regulating plate, and the steam-liquid mixing chamber, enabling control of the fluid volume and achieving precise control of the liquid-steam mixing ratio. This facilitates the automatic distribution of various waste heat sources. Compared to existing technologies, this invention significantly improves waste heat recovery efficiency, reduces energy consumption and carbon emissions, and offers significant environmental and economic benefits.

[0013] As a further embodiment of this utility model: a settling trough is provided in the middle position of the water inlet distribution plate, which sinks towards the steam regulating plate, and several distribution holes are provided circumferentially on the outer side of the settling trough.

[0014] As a further embodiment of this utility model: a countersunk hole with an opening is provided in the middle position of the steam regulating plate, and the outer side of the countersunk hole is movably connected to the top opening of the mixing channel.

[0015] As a further aspect of this utility model, the inner diameter of the countersunk hole is larger than the inner diameter of the countersunk groove.

[0016] As a further embodiment of this utility model: the mixing channel is an integral structure, which includes a cylindrical part and a conical part, and both the cylindrical part and the conical part are provided with a plurality of steam holes in the circumferential direction; the steam regulating plate is movably installed above the cylindrical part, and the water distribution mechanism is installed directly below the conical part.

[0017] As a further embodiment of this utility model: the steam hole is inclined from the outside to the inside, forming a flared steam hole.

[0018] As a further embodiment of this utility model: a protrusion is provided in the middle of the water distribution plate facing the mixing channel; the water distribution plate is evenly distributed with circular holes of different diameters, and the diameter of the circular holes decreases sequentially from the outer ring to the inner ring.

[0019] As a further embodiment of this utility model: the water inlet cover is designed in a conical shape, with the top being the water inlet with a small diameter and the bottom being the water outlet with a large diameter, and the bottom being detachably connected to the gas-liquid mixing outer cavity.

[0020] This utility model also discloses a heat exchange system, including the aforementioned automatic distribution device for multiple heat sources, and a heat exchanger installed at the bottom of the vapor-liquid mixing chamber.

[0021] This utility model also discloses a heat exchange system, including the aforementioned automatic distribution device for multiple heat sources, and a water outlet cover, which is installed at the bottom of the vapor-liquid mixing chamber.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. In this utility model, liquid enters through the water inlet cover, and then the water inlet cover reduces the flow rate. The water inlet distribution plate automatically distributes the liquid evenly and reduces the flow rate for buffering. The purpose of buffering is to prevent the fluid from directly entering the steam-water mixing chamber and avoid fully mixing with the steam, which could cause uneven steam-liquid state or large temperature differences.

[0024] The amount of steam entering is then adjusted. Steam enters from the steam inlet pipe. The steam regulating disc floats and adjusts the distance between the distribution disc and the steam regulating disc according to the kinetic energy of the steam. This allows the fluid to dynamically change within the cavity formed by the water inlet distribution disc, the steam regulating disc, and the steam-liquid mixing outer cavity. The fluid volume is controlled, achieving liquid-steam mixing ratio control and realizing automatic distribution of multiple waste heat sources.

[0025] Compared with existing technologies, this invention can significantly improve waste heat recovery efficiency, reduce energy consumption and carbon emissions, and has significant environmental and economic benefits.

[0026] 2. The water inlet cover of this utility model is cone-shaped, with a small inlet diameter at the top and a large outlet diameter at the bottom, forming a cone-shaped uniform flow distribution from small to large diameter, which reduces the flow velocity for a limited time and provides a preliminary measure for further uniform flow distribution.

[0027] 3. The water inlet distribution plate of this utility model is stepped in shape, with a settling trough in the middle and several distribution holes on the outer ring. The flow velocity at the bottom is relatively high. The settling trough guides the flow and automatically distributes it evenly, while also reducing the flow velocity buffer. The purpose of buffering is to prevent the fluid from directly entering the steam-water mixing chamber, which would prevent it from mixing fully with the steam and causing uneven steam-liquid state or large temperature differences. Usually, the gas is hotter than the liquid, so the liquid vaporizes and becomes a unified two-phase gas-liquid mixture. After the gas and liquid are fully mixed, the uniform state is conducive to subsequent heat exchange.

[0028] 4. This utility model is designed to work in conjunction with a steam regulating disc and a mixing channel. When the liquid pressure is high, the steam regulating disc is pressed down; when the steam pressure is high, the steam regulating disc is raised. The steam regulating disc adjusts the distance between the distribution disc and the steam regulating disc according to the kinetic energy of the steam and liquid. As a result, the cavity formed by the water inlet distribution disc, the steam regulating disc, and the steam-liquid mixing outer cavity is a dynamically changing water inlet cavity, and the fluid volume can be controlled to achieve the mixing ratio control of water and steam.

[0029] 5. The bottom of the mixing channel of this utility model is conical, and the whole is a multi-hole structure. The steam holes are designed to be inclined from the outside to the inside, which can fully and evenly mix while reducing resistance. As the amount of fluid after mixing increases, the amount of steam entering from the outside decreases, and the lower half of the mixing channel gradually expands to meet the mixing requirements.

[0030] 6. The water distribution plate of this utility model has a stepped structure with circular holes of different diameters evenly distributed on it. The outer circular holes have a larger diameter and the inner circular holes have a smaller diameter. The vapor-liquid mixture flows from top to bottom. The central circular hole has the smallest flow channel and is the easiest to pass through. The surrounding circular holes have long flow channels, and there is energy loss due to diffusion. This structure makes the vapor flow uniform and is conducive to sufficient heat exchange in the lower layer. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the heat exchanger system in Embodiment 3 of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the automatic waste heat distribution device of Embodiment 2 of this utility model;

[0033] Figure 3 This is an exploded view of the heat exchanger system of Embodiment 3 of this utility model;

[0034] Figure 4 This is an exploded view of the automatic waste heat distribution device of Embodiment 2 of this utility model;

[0035] Figure 5 This is a schematic diagram of the water inlet distribution plate according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the steam regulating disc in an embodiment of the present invention;

[0037] Figure 7 This is a cross-sectional view of the automatic waste heat distribution device of Embodiment 2 of this utility model;

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Water inlet cover;

[0040] 2. Inlet water distribution plate; 21. Distribution hole; 22. Settling tank;

[0041] 3. Vapor-liquid mixing chamber; 31. Steam inlet pipe;

[0042] 4. Steam regulating plate; 41. Countersunk hole;

[0043] 5. Mixing channel;

[0044] 6. Water distribution plate;

[0045] 7. Heat exchanger;

[0046] 8. Water outlet cover. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0048] Example 1

[0049] Reference Figure 1 and Figure 3 An automatic distribution device with multiple heat sources includes an inlet cover 1, an inlet distribution plate 2, a vapor-liquid mixing outer cavity 3, a steam regulating plate 4, a mixing channel 5, and an outlet water equalization plate 6. The inlet cover 1 is detachably installed on the top of the vapor-liquid mixing outer cavity 3 by bolts or pins. The inlet distribution plate 2, the vapor-liquid mixing outer cavity 3, the steam regulating plate 4, the mixing channel 5, and the outlet water equalization plate 6 are installed into the vapor-liquid mixing outer cavity 3 in a top-to-bottom order.

[0050] Reference Figure 1 and Figure 3 The inlet cover 1 is cone-shaped, with an inlet at the top and an outlet at the bottom. The inlet diameter is smaller than the outlet diameter. Several mounting holes are provided on the outer bottom ring, allowing for detachable installation to the top of the gas-liquid mixing chamber 3 using bolts or pins. This creates a cone-shaped, uniform flow distribution from a small diameter to a large diameter, temporarily reducing the flow velocity and providing a pre-treatment for further uniform flow distribution. The fluid medium enters the inlet cover 1, where it is dispersed in a funnel shape. It then passes through the distribution holes on the next step, the inlet distribution plate 2, for automatic and uniform distribution.

[0051] It should be noted that this application adopts a vertical water inlet cover 1 for water inlet, which is convenient for processing. Alternatively, a guide can be added for horizontal water inlet. This application only provides one implementation method and does not limit the specific implementation.

[0052] Reference Figure 5The water inlet distribution plate 2 has a stepped design, with a settling trough 22 in the middle that slopes towards the steam regulating plate 4. Several distribution holes 21 are evenly distributed around the outer circumference of the settling trough 22, leading to the steam regulating plate 4. It should be noted that this application… Figure 5 The middle distribution hole 21 is provided with seven holes, which is only one embodiment. This application does not limit the number of distribution holes.

[0053] The flow velocity directly below the inlet distribution plate 2 is relatively high. The settling tank guides the flow, automatically distributes the flow evenly, and reduces the flow velocity buffer. Considering economy and heat exchange effect, the fluid velocity needs to be controlled between 0.5 and 1.5 m / s. The purpose of buffering is to prevent the fluid from directly entering the steam-water mixing chamber 3, which would prevent it from mixing fully with the gas, resulting in uneven steam-liquid state or large temperature difference. Usually, the gas is hotter than the liquid, so the liquid vaporizes and becomes a unified two-phase steam-liquid mixture. After the steam and liquid are fully mixed, the unified state is conducive to subsequent heat exchange.

[0054] Reference Figure 1 and Figure 3 The vapor-liquid mixing outer cavity 3 has a cylindrical structure with flange-type structures at the top and bottom for easy disassembly and connection, and the top can be connected to the water inlet cover 1.

[0055] A steam inlet pipe 31 is provided at the upper part of the outer ring of the vapor-liquid mixing outer cavity 3 (see reference). Figure 2 The water inlet distribution plate 2 is welded and fixed inside the vapor-liquid mixing outer cavity 3, wherein the horizontal height of the steam inlet pipe 31 is lower than the horizontal height of the steam regulating plate 4.

[0056] Reference Figure 6 The steam regulating plate 4 is floatingly installed inside the vapor-liquid mixing outer cavity 3 and located directly below the water inlet distribution plate 2. A countersunk hole 41 with an opening is provided in the middle of the steam regulating plate 4, and the outer side of the countersunk hole 41 is movably connected to the top opening of the mixing channel 5. The inner diameter of the countersunk hole 41 is larger than the inner diameter of the settling tank 22, so that the liquid coming out of the settling tank 22 can enter the countersunk hole 41 and then enter the mixing channel 5 for the next step of vapor-liquid mixing.

[0057] This application sets up a steam regulating plate 4 to work in conjunction with a mixing channel 5. When the liquid pressure is high, the steam regulating plate 4 is pressed down; when the steam pressure is high, the steam regulating plate 4 is floated up. Steam enters the mixing channel 5 from the gap between the steam regulating plate 4 and the mixing channel 5. The steam regulating plate 4 adjusts the distance between the water inlet distribution plate 2 and the steam regulating plate 4 according to the kinetic energy of the steam and liquid. Thus, the cavity formed by the water inlet distribution plate 2, the steam regulating plate 4, and the steam-liquid mixing outer cavity 3 is a dynamically changing water inlet cavity. The fluid volume in this cavity is controlled to achieve water and steam mixing ratio control.

[0058] Reference Figure 5The mixing channel 5 is installed inside the vapor-liquid mixing outer cavity 3, and the bottom of the mixing channel 5 is fixed to the inner cavity of the vapor-liquid mixing outer cavity 3. The mixing channel 5 is an integral structure, and the whole is funnel-shaped. The mixing channel 5 includes a cylindrical part and a conical part, and several steam holes are circumferentially opened on both the cylindrical part and the conical part. The steam regulating plate 4 is movably installed above the cylindrical part, and the water distribution plate 6 is installed directly below the conical part. It should be noted that each steam hole on the mixing channel 5 is inclined from the outside to the inside, forming a flared steam hole.

[0059] Reference Figure 1 , Figure 3 and Figure 6 The water distribution plate 6 is fixed inside the vapor-liquid mixing outer cavity 3 and below the mixing channel 5. A protrusion is provided in the middle of the water distribution plate 6 facing the mixing channel 5. Different diameter holes are evenly distributed on the water distribution plate 6, and the diameter of the holes gradually decreases from the outer ring to the inner ring.

[0060] The water distribution plate of this invention has a stepped structure with evenly distributed circular holes of different diameters. The outer holes have larger diameters, while the inner holes have smaller diameters. The vapor-liquid mixture flows from top to bottom, with the central holes having the smallest flow channels for the easiest passage. The surrounding holes have longer flow channels, resulting in energy loss through diffusion. This structure ensures uniform vapor flow, which is beneficial for sufficient heat exchange in the lower layer. When the fluid enters the water distribution plate 6, it exits through the holes on the plate. The fluid resistance can be adjusted according to the structure of the water distribution plate 6 to regulate the flow velocity and achieve uniformity.

[0061] After the liquid medium enters through the water inlet cover 1, it forms a bucket-shaped dispersion according to the shape of the water inlet cover 1, and then passes through the water inlet distribution plate 2 for automatic and uniform distribution, and then falls into the mixing channel 5 from the steam regulating plate 4;

[0062] Steam is uniformly diverted into the steam inlet pipe 31 of the steam-liquid mixing outer cavity 3, and then enters through the steam hole of the mixing channel 5 to mix with the liquid medium;

[0063] During the process, the steam regulating plate 4 floats according to the kinetic energy of the steam, adjusting the distance between the water inlet distribution plate 2 and the steam regulating plate 4. Thus, the fluid is dynamically adjusted within the cavity formed by the water inlet distribution plate 2, the steam regulating plate 4, and the steam-liquid mixing outer cavity 3. The amount of fluid after the liquid medium and steam are mixed is controlled, achieving the mixing ratio control of the liquid medium and steam. Finally, the fluid enters the water outlet equalization plate 6, and the fluid resistance is changed through the water outlet equalization plate 6, resulting in uniform flow rate.

[0064] Example 2

[0065] Reference Figure 2 and Figure 4This embodiment discloses a heat exchange system, including a water inlet cover 1, a water inlet distribution plate 2, a vapor-liquid mixing outer cavity 3, a steam regulating plate 4, a mixing channel 5, a water outlet equalization plate 6, and a heat exchanger 7. The heat exchanger 7 is installed at the bottom of the vapor-liquid mixing outer cavity 3. Before entering the heat exchanger 7, the liquid heat source and the steam heat source are mixed in the vapor-liquid mixing outer cavity 3 and automatically distributed. The mixture is discharged from the water outlet equalization plate 6 and enters the heat exchanger 7 to achieve heat exchange, thereby realizing the automatic distribution of waste heat from multiple heat sources.

[0066] The heat exchanger 7 can be any existing coil-type or shell-and-tube heat exchanger to achieve sufficient heat exchange. It should be noted that this application does not limit the specific type of heat exchanger used for 7, but only provides one embodiment. Different heat exchangers 7 are mixed with the upper vapor-liquid fluid and connected via flange matching to achieve the most efficient supply of the required fluid temperature and heat energy.

[0067] Example 3

[0068] A heat exchange system, in this embodiment, differs from embodiment 2 in that the heat exchanger 7 is replaced with an outlet cover 8. The outlet cover 8 has the same structure as the inlet cover 1 and the two are symmetrically designed. The mixed fluid discharged from the outlet flow equalization plate 6 flows out through the outlet cover 8 and into the corresponding equipment.

[0069] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic distribution device for multiple heat sources, characterized in that, include: The outer wall of the vapor-liquid mixing chamber (3) is provided with a steam inlet pipe (31); The water inlet distribution mechanism includes a water inlet cover (1) located at the top of the vapor-liquid mixing outer cavity (3) and a water inlet distribution plate (2) located directly below the water inlet cover (1); The vapor-liquid mixing floating mechanism is installed inside the vapor-liquid mixing outer cavity (3), specifically including a mixing channel (5) and a steam regulating plate (4) movably installed on its top; several steam holes are opened on the mixing channel (5); the heat source entering from the water inlet cover (1) can drive the steam regulating plate (4) to move down under pressure, and the heat source entering from the steam inlet pipe (31) can drive the steam regulating plate (4) to float up under pressure; The water flow equalization mechanism is installed inside the vapor-liquid mixing outer cavity (3) and directly below the mixing channel (5).

2. The automatic distribution device for multiple heat sources according to claim 1, characterized in that: The water inlet distribution plate (2) has a settling trough (22) that sinks toward the steam regulating plate (4) at the middle position, and several distribution holes (21) are opened on the outer circumferential side of the settling trough (22).

3. The automatic distribution device for multiple heat sources according to claim 2, characterized in that: The steam regulating plate (4) is provided with a countersunk hole (41) with an opening at the middle position, and the outer side of the countersunk hole (41) is movably connected to the top opening of the mixing channel (5).

4. The automatic distribution device for multiple heat sources according to claim 3, characterized in that: The inner diameter of the countersink (41) is larger than the inner diameter of the countersink (22).

5. The automatic distribution device for multiple heat sources according to claim 1, characterized in that: The mixing channel (5) is an integral structure, which includes a cylindrical part and a conical part. Both the cylindrical part and the conical part are provided with several steam holes in the circumferential direction. The steam regulating plate (4) is movably installed above the cylindrical part, and the water distribution mechanism is installed directly below the conical part.

6. The automatic distribution device for multiple heat sources according to claim 5, characterized in that: The steam vents are inclined from the outside to the inside, forming flared steam vents.

7. The automatic distribution device for multiple heat sources according to claim 1, characterized in that: The middle of the water distribution plate (6) is provided with a protrusion facing the mixing channel (5); The water distribution plate (6) is evenly distributed with circular holes of different diameters, and the diameter of the circular holes decreases sequentially from the outer ring to the inner ring.

8. The automatic distribution device for multiple heat sources according to claim 1, characterized in that: The water inlet cover (1) is designed in a cone shape, with the top being the water inlet with a small diameter and the bottom being the water outlet with a large diameter. The bottom is detachably connected to the vapor-liquid mixing chamber (3).

9. A heat exchange system, characterized in that: The device includes an automatic distribution device for multiple heat sources as described in any one of claims 1-8, and further includes a heat exchanger (7) installed at the bottom of the vapor-liquid mixing chamber (3).

10. A heat exchange system, characterized in that: The device includes an automatic distribution device for multiple heat sources as described in any one of claims 1-8, and further includes a water outlet cover (8) installed at the bottom of the vapor-liquid mixing chamber (3).

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