Heat energy recovery device for agricultural product processing

Abstract

The utility model belongs to the field of agricultural product processing, and particularly relates to a heat energy recovery device for agricultural product processing. Comprising an outer shell, a first-stage heat exchange device, a second-stage heat exchange device and a third-stage heat exchange device. A first-stage heat exchange device, a second-stage heat exchange device and a third-stage heat exchange device are sequentially and fixedly arranged in the outer shell from top to bottom. The first-stage heat exchange device comprises a first-stage outer shell, and a first-stage inner shell is fixedly arranged in the first-stage outer shell. The second-stage heat exchange device comprises a second-stage outer shell, and a second-stage inner shell set is arranged in the second-stage outer shell. The third-stage heat exchange device comprises an outer coil pipe, and an inner coil pipe is arranged in the outer coil pipe; the first-stage outer shell, the second-stage outer shell and the outer coil pipe are sequentially communicated, and the first-stage inner shell, the second-stage inner shell and the inner coil pipe are sequentially communicated; hot waste water sequentially flows through the first-stage outer shell, the second-stage outer shell and the outer coil pipe, cold water sequentially flows through the inner coil pipe, the second-stage inner shell set and the first-stage inner shell, and heat exchange is completed in the circulation process of the cold water and the hot waste water.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural product processing, and in particular relates to a heat energy recovery device for agricultural product processing. Background Technology

[0002] Quick-freezing of agricultural products is a modern food processing method that involves rapidly freezing fresh agricultural products to preserve their original nutritional components and flavor. This method is widely used for various agricultural products, such as vegetables, fruits, meats, and seafood. For example, the quick-freezing process for corn typically includes cleaning and processing, steaming, rapid freezing, packaging, and storage. During steaming, steam boilers are usually used to provide steam, and quick-freezing typically uses a blast freezer. To promote energy conservation and emission reduction, electric steam boilers are usually chosen. However, while electric steam boilers have no environmental impact, their high electricity consumption undoubtedly increases the operating costs for businesses.

[0003] In response to these problems, the inventors considered that there is a lot of heat loss in the entire production line, such as the heat released by the refrigerant in the quick-freezing machine, the hot wastewater generated when cooling corn, and the hot wastewater generated during preheating. If this heat can be recovered and reused, it will definitely reduce the production costs for enterprises and be more in line with the concept of energy conservation and environmental protection. Utility Model Content

[0004] The purpose of this invention is to provide a heat recovery device for agricultural product processing to solve the problems existing in the prior art. To achieve the above-mentioned objective, the technical solution adopted by this invention is as follows:

[0005] A heat recovery device for agricultural product processing includes an outer shell, a primary heat exchanger, a secondary heat exchanger, and a tertiary heat exchanger. The primary heat exchanger, the secondary heat exchanger, and the tertiary heat exchanger are fixedly arranged sequentially from top to bottom within the outer shell. The primary heat exchanger includes a primary outer shell, within which a primary inner shell is fixedly arranged. The secondary heat exchanger includes a secondary outer shell, within which a secondary inner shell assembly is arranged. The tertiary heat exchanger includes an outer coil, within which an inner coil is arranged. The primary outer shell, the secondary outer shell, and the outer coil are sequentially connected, as are the primary inner shell, the secondary inner shell assembly, and the inner coil.

[0006] Furthermore, the first-stage inner shell is connected to a first-stage water outlet pipe, the first-stage outer shell is connected to a first-stage water inlet pipe, the first-stage water outlet pipe and the first-stage water inlet pipe pass through the outer shell, and the output end of the first-stage water outlet pipe is equipped with a first-stage pump, which is electrically connected to the control unit.

[0007] Furthermore, the secondary inner shell assembly includes multiple vertically arranged secondary inner shells, each secondary inner shell is connected to a secondary water outlet pipe, the secondary water outlet pipe penetrates the secondary outer shell, the output end of the secondary water outlet pipe is connected to a secondary pump, the output end of the secondary pump is connected to the primary inner shell, a first solenoid valve is provided on the secondary water outlet pipe, a temperature detector is provided inside the secondary inner shell, and the temperature detector and the first solenoid valve are electrically connected to a control unit.

[0008] Furthermore, a secondary water inlet pipe is connected to the top of the secondary outer casing, and the secondary water inlet pipe is connected to the primary outer casing. A second solenoid valve is provided on the secondary water inlet pipe, and a second temperature detector is provided inside the secondary outer casing. The second temperature detector and the second solenoid valve are electrically connected to the control unit.

[0009] Furthermore, a storage tank is fixedly provided at the bottom of the secondary outer shell, and the storage tank and the secondary outer shell are connected through a fifth solenoid valve, which is electrically connected to the control unit.

[0010] Furthermore, the input end of the outer coil is connected to the bottom of the storage tank, the output end of the inner coil is provided with a third solenoid valve, the input end of the outer coil is provided with a fourth solenoid valve, the input end of the inner coil and the output end of the outer coil penetrate the side wall of the outer shell, the input end of the inner coil is connected to a three-stage pump, and the three-stage pump, the third solenoid valve and the fourth solenoid valve are electrically connected to the control unit.

[0011] Furthermore, the outer casing is provided with an air inlet that communicates with the interior.

[0012] This invention has the following advantages: the discharged hot wastewater is exchanged with fresh water through a heat exchange device, the heat in the hot water is recovered, and the temperature of the fresh water is increased for use in buffering and heating other agricultural products. This allows the waste hot water to be reused, achieving a more environmentally friendly and energy-saving effect. At the same time, the heat exchange device adopts a three-stage heat exchange method, thereby making full use of the heat in the hot wastewater. Meanwhile, the outside is wrapped with inert gas to prevent heat loss, improving heat utilization. Attached Figure Description

[0013] Figure 1 This is a frontal sectional view of the device. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0015] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] like Figure 1 As shown, a heat recovery device for agricultural product processing includes an outer shell 1, a primary heat exchanger, a secondary heat exchanger, and a tertiary heat exchanger. The primary heat exchanger, secondary heat exchanger, and tertiary heat exchanger are fixedly installed inside the outer shell 1 from top to bottom. The primary heat exchanger includes a primary outer shell 2, within which a primary inner shell 3 is fixedly installed. The secondary heat exchanger includes a secondary outer shell 4, within which a secondary inner shell assembly is installed. The tertiary heat exchanger includes an outer coil 7, within which an inner coil 6 is installed. The primary outer shell 2, secondary outer shell 4, and outer coil 7 are sequentially connected, as are the primary inner shell 3, secondary inner shell assembly, and inner coil 6. High-temperature wastewater flows sequentially through the primary outer shell 2, the secondary outer shell 4, and the outer coil 7, while low-temperature cold water flows sequentially through the inner coil 6, the secondary inner shell group, and the primary inner shell 3. During the flow process, the high-temperature wastewater and the low-temperature cold water are diverted and exchanged in stages through the primary heat exchange device, the secondary heat exchange device, and the tertiary heat exchange device, thereby making full use of the heat in the high-temperature wastewater.

[0017] like Figure 1As shown, the first-stage inner shell 3 is connected to a first-stage water outlet pipe 301, which is used to transport the cooled water after heat exchange to the next process. The first-stage outer shell 2 is connected to a first-stage water inlet pipe 201, which is connected to an external high-temperature wastewater outlet and is equipped with a controllable switch. The first-stage water outlet pipe 301 and the first-stage water inlet pipe 201 pass through the outer shell 1. The output end of the first-stage water outlet pipe 301 is equipped with a first-stage pump 9, which is used to extract the cooled water after heat exchange in the inner shell 3. The first-stage pump 9 is electrically connected to the control unit. The secondary inner shell assembly includes multiple vertically arranged secondary inner shells 5, each containing chilled water to be heated. The multiple inner shells 5 increase the heat exchange area and improve heat exchange efficiency. Each secondary inner shell 5 is connected to a secondary outlet pipe 501, which penetrates the secondary outer shell 4. The output end of the secondary outlet pipe 501 is connected to a secondary pump 10, whose output end is connected to the primary inner shell 3. The secondary pump 10 pumps chilled water from the secondary outer shell 4 into the primary inner shell 3. A first solenoid valve 302 is installed on the secondary outlet pipe 501. A temperature detector 502 is installed inside the secondary inner shell 5. The temperature detector 502 and the first solenoid valve 302 are electrically connected to a control unit. The secondary outer shell 4 is connected to a secondary inlet pipe 402, which is connected to the primary outer shell 2. A second solenoid valve 401 is installed on the secondary inlet pipe 402. A second temperature detector 403 is installed inside the secondary outer shell 4. The temperature detector 403 and the second solenoid valve 401 are electrically connected to a control unit. A storage tank 11 is fixedly mounted on the bottom of the secondary outer casing 4. The storage tank 11 and the secondary outer casing 4 are connected by a fifth solenoid valve 1101, which is electrically connected to the control unit. The input end of the outer coil 7 is connected to the bottom of the storage tank 11. The output end of the inner coil 6 is equipped with a third solenoid valve 601, and the input end of the outer coil 7 is equipped with a fourth solenoid valve 701. The input end of the inner coil 6 and the output end of the outer coil 7 penetrate the side wall of the outer casing 1. A three-stage pump 8 is connected to the input end of the inner coil 6. The three-stage pump 8 is used to pump unheated cold water into the inner coil 6. The three-stage pump 8, the third solenoid valve 601, and the fourth solenoid valve 701 are electrically connected to the control unit. The control unit controls the components electrically connected to it.

[0018] In addition, the outer shell 1 is provided with an air inlet 101 that connects to the interior. The external pressure balancing system ensures the insulation of the interior of the outer shell 1 by injecting inert gas into it, preventing heat loss. At the same time, the pressure balancing system ensures the balance of the internal pressure of the outer shell 1 to prevent the tank from deforming. It should also be noted that the outer shell 1 is connected to the internal pressure of the primary outer shell 2, the inner shell 3, and the secondary outer shell 4 (this can be achieved by setting openings on the top of each component) to prevent deformation of each component.

[0019] Working principle: ① At the beginning of operation, cold water flows into the inner coil 6 through the three-stage pump 8, then into the secondary inner shell 5 through the inner coil 6, and finally into the primary inner shell 3 through the secondary pump 10. When the three-stage pump 8 starts working, high-temperature wastewater enters the primary outer shell 2 through the primary inlet pipe 201. The primary inner shell 3 is kept full of cold water, while the secondary inner shell 5 is kept half full. During the above process, the first solenoid valve 302 and the third solenoid valve 601 are open, while the second solenoid valve 401, the fourth solenoid valve 701, and the fifth solenoid valve 1101 are closed. ② After a period of time, the control unit controls the second solenoid valve 401 to open, and the wastewater in the primary outer shell 2 flows into the secondary outer shell 4. After it has completely flowed out, the second solenoid valve 401 closes, and new wastewater is injected into the primary outer shell 2. ③ When the temperature indices of temperature detector 1 (502) and temperature detector 2 (403) are the same, the tertiary pump 8 refills the secondary inner shell 5 with water to fill the secondary outer shell 4 with cold water (during subsequent operation, the wastewater in the storage tank 11 flows out through the outer coil 7, and the cold water and wastewater undergo a final heat exchange in the inner coil 6 and outer coil 7). At the same time, the primary pump 9 removes the cold water from the primary inner shell 3 after heat exchange. ④ When the temperature indices of temperature detector 1 (502) and temperature detector 2 (403) are the same again, the secondary pump 10 pumps the cold water from the secondary inner shell 5 to the primary inner shell 3. At the same time, the wastewater in the secondary outer shell 4 flows into the storage tank 11 through the fifth solenoid valve 1101. After the wastewater in the secondary outer shell 4 is completely discharged (the fifth solenoid valve 1101 is closed), the wastewater in the primary outer shell 2 flows into the secondary outer shell 4. After the wastewater in the primary outer shell 2 is completely discharged, external wastewater is introduced into the primary outer shell 2. ⑤ After the cold water in the secondary inner shell 5 is completely pumped out, the tertiary pump 8 starts working to pump external cold water into the secondary inner shell 5 through the inner coil 6. At the same time, the wastewater in the storage tank 11 flows out through the outer coil 7. The cold water and wastewater undergo a final heat exchange in the inner coil 6 and the outer coil 7 (only half of the wastewater in the storage tank 11 is discharged here; the other half will be discharged during step ③). Then, steps ③, ④, and ⑤ are repeated.

[0020] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A heat recovery device for agricultural product processing, characterized by: The utility model provides a kind of three-stage heat exchange device, including shell (1), primary heat exchange device, secondary heat exchange device and tertiary heat exchange device;The shell (1) is sequentially fixed with the primary heat exchange device, the secondary heat exchange device and the tertiary heat exchange device from top to bottom;The primary heat exchange device includes primary shell (2), and primary shell (2) is fixed with primary inner shell (3);The secondary heat exchange device includes secondary shell (4), and secondary shell (4) is equipped with secondary inner shell group;The tertiary heat exchange device includes outer coil pipe (7), and outer coil pipe (7) is equipped with inner coil pipe (6);Primary shell (2), secondary shell (4) and outer coil pipe (7) are sequentially communicated, and primary inner shell (3), secondary inner shell group and inner coil pipe (6) are sequentially communicated.

2. The heat recovery device for agricultural product processing according to claim 1, characterized in that: Primary inner shell (3) is communicated with primary water outlet pipe (301), and primary shell (2) is communicated with primary water inlet pipe (201), and primary water outlet pipe (301) and primary water inlet pipe (201) penetrate shell (1), and the output end of primary water outlet pipe (301) is equipped with primary pump (9), and primary pump (9) is electrically connected with control unit.

3. The heat recovery device for agricultural product processing according to claim 1, characterized in that: Secondary inner shell group includes a plurality of vertically arranged secondary inner shells (5), and secondary inner shell (5) is communicated with secondary water outlet pipe (501), and secondary water outlet pipe (501) penetrates secondary shell (4), and the output end of secondary water outlet pipe (501) is connected with secondary pump (10), and the output end of secondary pump (10) is communicated with primary inner shell (3), and first electromagnetic valve (302) is arranged on secondary water outlet pipe (501), and temperature detector one (502) is arranged in secondary inner shell (5), and temperature detector one (502) and first electromagnetic valve (302) are electrically connected with control unit.

4. The heat recovery device for agricultural product processing according to claim 1, characterized in that: Secondary shell (4) is communicated with secondary water inlet pipe (402), and secondary water inlet pipe (402) is communicated with primary shell (2), and second electromagnetic valve (401) is arranged on secondary water inlet pipe (402), and temperature detector two (403) is arranged in secondary shell (4), and temperature detector two (403) and second electromagnetic valve (401) are electrically connected with control unit.

5. The heat recovery device for agricultural product processing according to claim 1, characterized in that: The bottom of secondary shell (4) is fixedly provided with a flow storage tank (11), and the flow storage tank (11) and the secondary shell (4) are communicated through a fifth electromagnetic valve (1101), and the fifth electromagnetic valve (1101) is electrically connected with the control unit.

6. The heat recovery device for agricultural product processing according to claim 5, characterized in that: The input end of outer coil pipe (7) is communicated with the bottom of flow storage tank (11), the output end of inner coil pipe (6) is provided with a third electromagnetic valve (601), the input end of outer coil pipe (7) is provided with a fourth electromagnetic valve (701), the input end of inner coil pipe (6) and the output end of outer coil pipe (7) penetrate the side wall of shell (1), and the input end of inner coil pipe (6) is connected with tertiary pump (8), and tertiary pump (8), third electromagnetic valve (601) and fourth electromagnetic valve (701) are electrically connected with control unit.

7. The heat recovery device for agricultural product processing according to claim 1, characterized in that: The outer shell (1) is provided with an air inlet hole (101) communicating with the inside.

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