Integrated heat exchanger for livestock breeding

Abstract

The utility model discloses an integrated heat exchanger for livestock breeding, and belongs to the field of livestock breeding equipment, the integrated heat exchanger comprises a shell, a liquid storage tank and a tubular heat exchange core are arranged in the shell, an air inlet of the tubular heat exchange core communicates with a fresh air inlet, an air outlet of the tubular heat exchange core communicates with a fresh air outlet, and a liquid inlet of the tubular heat exchange core communicates with a liquid outlet of the liquid storage tank; a waste gas circulation pipeline is arranged in the liquid storage tank, a liquid medium serves as an intermediate medium, dirty air enters the shell through the dirty air inlet and then enters the waste gas circulation pipeline in the liquid storage tank, and when the dirty air flows in the waste gas circulation pipeline, heat carried by the dirty air is transferred to the surrounding liquid medium, so that the liquid medium flows in the waste gas circulation pipeline. Due to the fact that the specific heat capacity of the liquid medium is large, heat in dirty air can be effectively absorbed, the problems of blockage and corrosion caused by harmful gas and particulate matter in the dirty air in an indirect heat exchange mode are solved, energy waste is reduced, and the energy recovery rate and the heat utilization efficiency of the whole system are improved.

Description

Technical Field

[0001] This application belongs to the field of livestock and poultry breeding equipment, and particularly relates to an integrated heat exchanger for livestock and poultry breeding. Background Art

[0002] In recent years, with the rapid development of the livestock and poultry breeding industry, the attention to the control of the indoor environment has been increasing day by day. As a key link in regulating the indoor environment, ventilation not only directly affects the healthy growth of animals and breeding efficiency, but also impacts the working conditions and health of breeders. However, in the cold season, there is a significant contradiction between heat preservation and ventilation in livestock and poultry houses. Against this background, heat recovery technology has emerged. This technology can efficiently recover the heat energy in the exhaust gas on the premise of ensuring that the fresh air and the discharged polluted air do not mix directly, and use it to preheat the fresh air entering the house, thus effectively increasing the temperature of the fresh air.

[0003] Although the principle of heat recovery equipment for livestock and poultry breeding is similar to that in the field of heating, ventilation, and air conditioning, due to differences in application scenarios, such as a very large exhaust volume, high humidity of the exhaust air, containing corrosive gases and a large amount of dust, etc., there are many differences between heat recovery equipment for livestock and poultry breeding and ordinary heat recovery equipment. In order to adapt to the characteristics of livestock and poultry houses, plate-fin heat exchange equipment is more common in the livestock and poultry industry because of its large fin spacing and large ventilation volume. However, in terms of heat exchange mode, it mostly adopts air-air heat exchange and sensible heat recovery mode. Compared with air-liquid heat exchange, the heat exchange efficiency is slightly lower. However, the latter faces higher maintenance costs and potential blockage risks in the livestock and poultry house environment. If it is possible to achieve air-liquid heat exchange, not easily blocked, and achieve higher heat recovery efficiency, it will undoubtedly be an important technical research direction. Thus, the existing technology needs to be further improved and enhanced. Summary of the Utility Model

[0004] The utility model provides an integrated heat exchanger for livestock and poultry breeding to at least solve or alleviate one or more technical problems in the existing technology, or at least provide a beneficial alternative.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An integrated heat exchanger for livestock and poultry breeding, comprising a housing, the housing is provided with a fresh air inlet, a fresh air outlet, a dirty air inlet and a dirty air outlet, a liquid storage tank and a tubular heat exchange core are arranged inside the housing, the air inlet of the tubular heat exchange core is communicated with the fresh air inlet, the air outlet is communicated with the fresh air outlet, the liquid inlet of the tubular heat exchange core is communicated with the liquid discharge port of the liquid storage tank, and the liquid outlet is communicated with the reflux port of the liquid storage tank. The liquid storage tank is used for storing a liquid medium, and an exhaust gas circulation pipeline is arranged inside the liquid storage tank. One end of the exhaust gas circulation pipeline is communicated with the dirty air inlet and the other end is communicated with the housing space; Fresh air flows from the fresh air inlet into the shell side / heat exchange tube of the tubular heat exchange core, exchanges heat with the liquid medium in the liquid storage cavity, realizes preheating of the fresh air, enters the housing space, and the exhaust gas with waste heat heats the housing space and the low-temperature liquid medium after the fresh air heat exchange is completed, so as to improve the heat exchange efficiency.

[0007] The integrated heat exchanger for livestock and poultry breeding of the present application uses a liquid medium as an intermediate medium. Dirty air enters the housing through the dirty air inlet and then enters the exhaust gas circulation pipeline in the liquid storage tank. When the dirty air flows in the exhaust gas circulation pipeline, the heat it carries is transferred to the surrounding liquid medium. Since the specific heat capacity of the liquid medium is relatively large, it can effectively absorb the heat in the dirty air. The indirect heat exchange method avoids the problems of blockage and corrosion caused by harmful gases and particulate matter in the dirty air. Fresh air enters the shell side or heat exchange tube of the tubular heat exchange core through the fresh air inlet. After the dirty air exchanges heat with the liquid medium, its temperature decreases but still carries a certain amount of waste heat. These dirty airs then enter the housing space. In the housing space, the waste heat of the dirty air heats the surrounding environment, which helps to reduce the impact of the cold environment on the heat recovery equipment. In addition, a primary purification device, such as adsorption carbon, can be set in the housing space to purify the dirty air preliminarily. The housing space needs to ensure airtightness to prevent the leakage of dirty air. At the same time, this part of the waste heat is also used to preliminarily heat the liquid medium that has cooled down after exchanging heat with the fresh air, so that it has a certain initial temperature before entering the liquid storage tank, reducing energy waste. This way of using waste heat improves the energy recovery rate and heat utilization efficiency of the whole system.

[0008] In a preferred implementation scheme, the exhaust gas circulation pipeline is spirally arranged on the inner wall of the liquid storage tank or arranged in a serpentine shape at the bottom of the liquid storage tank.

[0009] By setting the exhaust gas circulation pipeline with a spiral or serpentine layout, the flow path of the dirty air in the liquid storage tank is extended, and the contact area and time between the dirty air and the liquid medium are increased, thereby improving the heat transfer efficiency.

[0010] In a preferred implementation scheme, a blower is arranged at the position of the fresh air outlet, and an exhaust fan is arranged at the position of the dirty air outlet.

[0011] In a preferred implementation scheme, filter elements are arranged at the positions of the fresh air inlet and the dirty air inlet to block the entry of particulate dust.

[0012] In a preferred implementation, a pump body and a temperature sensor are provided in the liquid storage tank. The temperature sensor detects the temperature of the liquid in the liquid storage tank and transmits a signal to the controller, and the controller controls the pump body to work to send the liquid medium into the tubular heat exchange core.

[0013] Precisely control the circulation of the liquid medium and the preheating temperature of the fresh air to ensure the stability of the living environment of livestock and poultry. A pump body and a temperature sensor are provided in the liquid storage tank. The temperature sensor detects the temperature of the liquid in the liquid storage tank and transmits a signal to the controller, and the controller controls the pump body to work to send the liquid medium into the tubular heat exchange core.

[0014] In a preferred implementation, sterilization lamps are also provided at the positions of the fresh air outlet and the fresh air inlet to sterilize the fresh air.

[0015] In a preferred implementation, the liquid outlet of the tubular heat exchange core is connected to the return port of the liquid storage tank through a return pipe, and the exhaust gas circulation pipeline outside the liquid storage tank is wound around the outside of the return pipe.

[0016] The exhaust gas circulation pipeline is wound around the outside of the return pipe, and the waste heat in the exhaust gas is used to preheat the cooled liquid medium. When the exhaust gas flows in the pipeline, the heat it carries will be transferred to the liquid medium in the return pipe in contact with it through the pipe wall, so that the liquid medium is preheated before returning to the liquid storage tank. The utilization efficiency of energy is improved. The preheated liquid medium has a higher temperature when entering the liquid storage tank, which helps to shorten the time for subsequent heating to the target temperature and improves the overall efficiency of the heat exchange system.

[0017] In a preferred implementation, the tubular heat exchange core is installed inside the housing through a suspension bracket and is located above the liquid storage tank.

[0018] In a preferred implementation, baffle plates are further provided in the tubular heat exchange core.

[0019] The baffle plates change the flow direction of the fluid in the pipe, causing the fluid to form vortices and turbulence during the flow process, thereby increasing the contact area and heat transfer time between the fluid and the heat exchange pipe wall and improving the heat transfer efficiency. Brief Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic structural diagram of a schematic implementation state of the integrated heat exchanger for livestock and poultry breeding used in the present application is shown;

[0022] Figure 2Shows a schematic enlarged view of a structural schematic implementation of the integrated heat exchanger for livestock and poultry farming in this application;

[0023] Label description:

[0024] 1 - Housing; 10 - Fresh air inlet; 11 - Fresh air outlet; 12 - Polluted air inlet; 13 - Polluted air outlet; 14 - Suspension bracket; 2 - Liquid storage tank; 20 - Drain port; 21 - Return port; 3 - Tube heat exchange core; 30 - Air inlet; 31 - Air outlet; 32 - Liquid inlet; 33 - Liquid outlet; 4 - Blower; 5 - Exhaust fan; 6 - Filter element; 7 - Pump body; 8 - Temperature sensor; 9 - Return pipe. Specific implementation mode

[0025] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.

[0027] In the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and only a connection structure is used to connect them to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0029] The present utility model will be described below in conjunction with the accompanying drawings of the specification.

[0030] The specific solution adopted is as follows:

[0031] As Figure 1-2 shown, the present utility model provides an integrated heat exchanger for livestock and poultry breeding, including a housing 1. The housing is provided with a fresh air inlet 10, a fresh air outlet 11, a dirty air inlet 12, and a dirty air outlet 13. Inside the housing, there is a liquid storage tank 2 and a tubular heat exchange core 3. The air inlet 30 of the tubular heat exchange core is connected to the fresh air inlet, and the air outlet 31 is connected to the fresh air outlet. The liquid inlet 32 of the tubular heat exchange core is connected to the liquid discharge port 20 of the liquid storage tank, and the liquid outlet 33 is connected to the return port 21 of the liquid storage tank. The liquid storage tank is used to store a liquid medium such as water. An exhaust gas circulation pipeline is arranged inside the liquid storage tank, with one end of the exhaust gas circulation pipeline connected to the dirty air inlet and the other end connected to the housing space. Fresh air flows from the fresh air inlet into the shell side / heat exchange tubes of the tubular heat exchange core, exchanges heat with the liquid medium in the liquid storage cavity, realizes preheating of the fresh air, and the exhaust gas with waste heat in the housing space heats the housing space and the low-temperature liquid medium after the heat exchange of the fresh air is completed, so as to improve the heat exchange efficiency.

[0032] In the integrated heat exchanger for livestock and poultry breeding of the present application, during operation, dirty air enters the housing through the dirty air inlet 12, and then enters the exhaust gas circulation pipeline in the liquid storage tank 2. When the dirty air flows in the exhaust gas circulation pipeline, it transfers the heat carried by it to the surrounding liquid medium. Since the specific heat capacity of the liquid medium is relatively large, it can effectively absorb the heat in the dirty air. Fresh air enters the shell side or heat exchange tubes of the tubular heat exchange core 3 through the fresh air inlet. During the flow of the fresh air, it exchanges heat with the liquid medium that has already absorbed the heat of the dirty air. The liquid medium transfers the heat to the fresh air to realize preheating of the fresh air.

[0033] The dirty air after heat exchange with the liquid medium has a reduced temperature but still carries a certain amount of waste heat. This dirty air then enters the housing space. In the housing space, the waste heat of the dirty air heats the surrounding environment, which helps to reduce the impact of the cold environment on the heat recovery equipment. At the same time, this part of the waste heat is also used to preliminarily heat the liquid medium that has cooled down after heat exchange with the fresh air, so that it has a certain initial temperature before entering the liquid storage tank 2. The liquid medium with the initial temperature flows back to the liquid storage tank through the liquid outlet of the tubular heat exchange core 3. Subsequently, the heated liquid medium enters the liquid inlet of the tubular heat exchange core again through the liquid discharge port of the liquid storage tank, starting a new round of heat exchange cycle.

[0034] Using a liquid medium as an intermediate medium increases the heat exchange area and heat exchange efficiency. The liquid medium has a large specific heat capacity and can effectively absorb and release heat. The indirect heat exchange method avoids the problems of blockage and corrosion that harmful gases and particulate dust in the polluted air may cause to the heat exchanger, improving the stability and reliability of the system. After the polluted air transfers heat to the liquid medium, the remaining heat is still effectively used to heat the housing space and preliminarily heat the liquid medium, reducing energy waste. This method of waste heat utilization improves the energy recovery rate and heat utilization efficiency of the entire system. This solution is applicable to special environments such as livestock and poultry breeding with large exhaust air volume, high humidity, corrosive gases and dust. By selecting appropriate liquid media and materials, different working conditions can be adapted.

[0035] As a preferred embodiment of the present application, the exhaust gas circulation pipeline is spirally arranged on the inner wall of the liquid storage tank 2 or arranged in a serpentine shape at the bottom of the liquid storage tank. In the first embodiment, the exhaust gas circulation pipeline rises or falls in a spiral shape along the inner wall of the liquid storage tank, forming one or more continuous spiral coils. This not only prolongs the flow path of the polluted air in the liquid storage tank but also increases the contact area and time between the polluted air and the liquid medium, thereby improving the heat transfer efficiency. In the second embodiment, the exhaust gas circulation pipeline is arranged in a serpentine or winding manner at the bottom of the liquid storage tank, forming multiple bending sections, which also prolongs the flow path of the polluted air and causes the polluted air to continuously change direction during the flow, increasing the opportunity for mixing and heat exchange with the liquid medium. The exhaust gas circulation pipelines at the bottom and the side wall can also be set simultaneously to extend the flow path of the polluted air and increase the contact area, enabling the polluted air to more fully transfer the heat it carries to the liquid medium.

[0036] As a preferred embodiment of the present application, a blower 4 is provided at the fresh air outlet position, and an exhaust fan 5 is provided at the polluted air outlet position. When the blower and the exhaust fan work simultaneously, they form a complete air circulation system. The blower sends fresh air into the tubular heat exchange core for preheating, while the exhaust fan discharges the cooled polluted air into the integrated heat exchanger and guides it through the exhaust gas circulation pipeline for heat exchange. By adjusting the operating parameters (such as air volume, air pressure, rotational speed, etc.) of the two fans, precise control of the entire heat exchange process can be achieved, ensuring that the fresh air and the polluted air can flow along the designed path and achieve the best effect during the heat exchange process. It can be understood that at the polluted air outlet, the polluted air needs to be introduced into the purification equipment to complete purification and meet the emission requirements before being discharged into the atmospheric environment.

[0037] As a preferred embodiment of the present application, filter elements 6 are provided at both the fresh air inlet 10 and the polluted air inlet 12 positions to block particulate dust from entering, thereby achieving the cleanliness of the fresh air and the stability of the heat exchange system.

[0038] As a preferred embodiment of the present application, in order to more precisely control the circulation of the liquid medium and the preheating temperature of the fresh air, and ensure the stability of the living environment of livestock and poultry, a pump body 7 and a temperature sensor 8 are provided in the liquid storage tank 2. The temperature sensor detects the temperature of the liquid in the liquid storage tank and transmits the signal to the controller, and the controller controls the pump body to work to send the liquid medium into the tubular heat exchange core. Specifically, the temperature sensor can be installed inside the liquid storage tank or at a position connected to the fresh air outlet, for real-time monitoring of the temperature of the liquid medium or fresh air. The sensor transmits the detected temperature signal to the controller, and the controller controls the pump body or other related equipment according to the preset temperature range and target value, starts, stops or adjusts its working frequency to change the circulation speed and flow rate of the liquid medium, thereby adjusting the preheating temperature of the fresh air, improving the temperature stability and energy efficiency level of the heat exchange system, and also realizing the intelligent management and scalability of the system, providing strong support for the sustainable development of the livestock and poultry breeding industry.

[0039] As a preferred embodiment of the present application, sterilization lamps are also provided at the fresh air outlet and fresh air inlet positions to sterilize the fresh air and ensure the air quality of the fresh air entering the house.

[0040] As a preferred embodiment of the present application, the liquid outlet of the tubular heat exchange core is connected to the return port of the liquid storage tank through a return pipe 9, forming a closed-loop liquid medium circulation system. When the liquid medium completes the heat exchange with the fresh air in the tubular heat exchange core and cools down, it flows back to the liquid storage tank through the return pipe, ready to be heated again and used for heat exchange. The waste gas circulation pipeline is wound outside the return pipe, and the waste heat in the waste gas is used to preheat the cooled liquid medium. When the waste gas flows in the pipeline, the heat it carries will be transferred to the liquid medium in the return pipe in contact with the pipe wall through the pipe wall, so that the liquid medium is preheated before flowing back to the liquid storage tank. The energy utilization efficiency is improved, and the preheated liquid medium has a higher temperature when entering the liquid storage tank, which helps to shorten the time for subsequent heating to the target temperature and improves the overall efficiency of the heat exchange system.

[0041] As a preferred embodiment of the present application, the tubular heat exchange core is installed inside the housing through a suspension bracket 14, located above the liquid storage tank 2, so as to reasonably layout the internal space of the housing.

[0042] As a preferred embodiment of the present application, a baffle plate is also provided inside the tubular heat exchange core 3.

[0043] The baffle plate changes the flow direction of the fluid in the pipe, causing the fluid to form vortices and turbulence during the flow process, thereby increasing the contact area and heat transfer time between the fluid and the heat exchange pipe wall and improving the heat transfer efficiency.

[0044] What is not described in this utility model can be realized by adopting or referring to the existing technology.

[0045] The above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various changes or substitutions thereof, and these should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An integrated heat exchanger for livestock and poultry breeding, characterized in that, It includes a housing, which is provided with a fresh air inlet, a fresh air outlet, a dirty air inlet and a dirty air outlet. Inside the housing, there is a liquid storage tank and a tubular heat exchange core. The air inlet of the tubular heat exchange core is connected to the fresh air inlet, and the air outlet is connected to the fresh air outlet. The liquid inlet of the tubular heat exchange core is connected to the liquid discharge port of the liquid storage tank, and the liquid outlet is connected to the return port of the liquid storage tank. The liquid storage tank is used to store the liquid medium. An exhaust gas circulation pipeline is arranged inside the liquid storage tank, with one end connected to the dirty air inlet and the other end connected to the housing space. Fresh air flows from the fresh air inlet into the shell side / heat exchange tubes of the tubular heat exchange core, exchanges heat with the liquid medium in the liquid storage cavity to realize preheating of the fresh air, and the exhaust gas with residual heat in the housing space heats the housing space and the low-temperature liquid medium after the fresh air heat exchange is completed, so as to improve the heat exchange efficiency.

2. The integrated heat exchanger for livestock and poultry breeding according to claim 1, characterized in that The exhaust gas circulation pipeline is spirally arranged on the inner wall of the liquid storage tank or arranged in a serpentine shape at the bottom of the liquid storage tank.

3. The integrated heat exchanger for livestock and poultry breeding according to claim 1, characterized in that, A blower is arranged at the position of the fresh air outlet, and an exhaust fan is arranged at the position of the dirty air outlet.

4. An integrated heat exchanger for livestock and poultry farming according to claim 1, characterized in that, Filter elements are provided at the positions of the fresh air inlet and the dirty air inlet to block the entry of particulate dust.

5. An integrated heat exchanger for livestock and poultry breeding according to claim 1, characterized in that, A pump body and a temperature sensor are arranged inside the liquid storage tank. The temperature sensor detects the liquid temperature in the liquid storage tank and transmits the signal to the controller, and the controller controls the pump body to work to send the liquid medium into the tubular heat exchange core.

6. The integrated heat exchanger for livestock and poultry breeding according to claim 1, wherein, Sterilization lamps are also provided at the positions of the fresh air outlet and the fresh air inlet to sterilize the fresh air.

7. The integrated heat exchanger for livestock and poultry breeding according to claim 1, characterized in that, The liquid outlet of the tubular heat exchange core is connected to the return port of the liquid storage tank through a return pipe, and the exhaust gas circulation pipeline outside the liquid storage tank is wound around the outside of the return pipe.

8. The one-piece heat exchanger for livestock and poultry breeding according to claim 1, characterized in that The tubular heat exchange core is installed inside the housing through a suspension bracket and is located above the liquid storage tank.

9. The integrated heat exchanger for livestock and poultry breeding according to claim 1, characterized in that, A baffle is also arranged inside the tubular heat exchange core.

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