A device for recovering waste heat in pet food puffing process

Abstract

The present invention relates to the technical field of waste heat recovery devices, and specifically discloses a waste heat recovery device in a pet food puffing process, including a puffing drying device and a waste heat recovery device, wherein the puffing drying device is fixedly connected to the top of the waste heat recovery device, and the doors of the puffing drying device and the waste heat recovery device are arranged on the same side; the waste heat recovery device includes a transmission component, a heat exchange component and an inlet and outlet pipe component, and the transmission component includes a fixed ring, a first gear, a second gear and a motor, the fixed ring is fixedly sleeved on the heat exchange component, the first gear is fixedly sleeved on the fixed ring, the second gear is fixedly connected to one side of the motor, and the first gear meshes with the second gear. The present invention can realize that the heat energy recovered by the device can heat water and raw materials at the same time, and the heat energy forms a cycle between the puffing drying device and the waste heat recovery device, which reduces the heating time of raw materials in the puffing process, improves production efficiency, improves heat energy utilization, and improves process sustainability.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery devices, and in particular to a waste heat recovery and utilization device in a pet food puffing process. Background Art

[0002] The puffing process usually involves heating and high-pressure treatment of raw materials to produce the puffing effect. This process consumes a lot of energy and also generates a lot of heat. In the traditional puffed grain drying process, a large amount of heat is directly discharged into the environment after drying, resulting in energy waste. With the continuous rise in energy costs and the increase in environmental awareness, the development of effective waste heat recovery technology is of great significance to improving the energy efficiency and sustainability of the puffing process.

[0003] At present, the existing technology still has the following areas for improvement: most of the waste heat recovery devices on the market are only used to heat water after recovering heat energy, which is used in the process of food puffing process that requires hot water. The utilization method of heat energy is single, and the recovered heat energy will still be directly discharged into the environment after use. Part of the heat energy is not fully utilized, resulting in energy waste. When carrying out the puffing process, the raw materials need to be heated from the beginning, which increases the production time and reduces the production efficiency. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a waste heat recovery device in the pet food puffing process, which can realize that the heat energy recovered by the device can heat water and raw materials at the same time, and the heat energy is circulated between the puffing and drying device and the waste heat recovery device, thereby reducing the heating time of the raw materials in the puffing process, improving production efficiency, improving heat energy utilization, and improving process sustainability.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A waste heat recovery device in a pet food puffing process, comprising a puffing and drying device and a waste heat recovery device, wherein the puffing and drying device is fixedly connected above the waste heat recovery device, and the doors of the puffing and drying device and the waste heat recovery device are arranged on the same side;

[0007] The waste heat recovery device comprises a transmission assembly, a heat exchange assembly and an inlet and outlet pipe assembly, the transmission assembly comprises a fixed ring, a first gear, a second gear and a motor, the fixed ring is fixedly sleeved on the heat exchange assembly, the first gear is fixedly sleeved on the fixed ring, the second gear is fixedly connected to one side of the motor, and the first gear meshes with the second gear;

[0008] The heat exchange assembly includes a first heat exchange tube, a water tube, a feeding tube, a heat preservation cover, a bearing, a bracket, and a second heat exchange tube. The first heat exchange tube is rotatably connected to the second heat exchange tube, the water tube is fixedly sleeved on the second heat exchange tube, the first heat exchange tube is rotatably sleeved on the feeding tube through the bearing, the heat preservation cover is arranged between the water tube and the feeding tube, and the bracket is fixedly connected below the water tube and the feeding tube.

[0009] Preferably, the inlet and outlet pipe assembly includes a feed pipe, a discharge pipe, a water inlet pipe, a water outlet pipe, an air pump, a solenoid valve, an air inlet pipe and an air supply pipe. The feed pipe is fixedly connected to the top of one side of the feed pipe, the discharge pipe is fixedly connected to the bottom of the other side of the feed pipe, the water inlet pipe is fixedly connected to the top of one side of the water pipe, and the water outlet pipe is fixedly connected to the bottom of the other side of the water pipe.

[0010] Preferably, the first heat exchange tube is rotatably connected to the air intake pipe, and an air extraction pump is fixedly connected to the air intake pipe.

[0011] Preferably, the second heat exchange tube is fixedly connected to the air supply pipe, and the solenoid valve is fixedly connected to the air supply pipe.

[0012] Preferably, the first heat exchange tube is provided with a stirring blade, and the stirring blade is located inside the material placing tube.

[0013] Preferably, the diameters of the first gear and the second gear are the same.

[0014] Preferably, a through hole is provided in the middle of the second gear, and the output shaft of the motor passes through the through hole of the second gear.

[0015] Preferably, a sealing ring is provided at a connecting portion between the water pipe and the second heat exchange tube and a connecting portion between the bearing and the first heat exchange tube.

[0016] Preferably, the feed pipe and the discharge pipe are arranged in an L shape, and the feed port of the feed pipe and the discharge port of the discharge pipe are arranged toward the door side of the waste heat recovery device.

[0017] Preferably, the water inlet pipe and the water outlet pipe are arranged in an L shape, and the water inlet of the water inlet pipe and the water outlet of the water outlet pipe are arranged in a direction toward the air supply pipe side of the waste heat recovery device.

[0018] The beneficial effects of the present invention are:

[0019] (1) By setting up a heat exchange component, the technical effect that can be achieved is that the heat energy recovered by the device can be used to heat water and raw materials at the same time, thereby improving the utilization rate of heat energy and allowing the raw materials to be preheated before puffing and drying, thereby reducing the heating time of the raw materials in the puffing process and improving production efficiency.

[0020] (2) By setting up the heat exchange component, the technical effect that can be achieved is that the heat preservation cover is set between the water pipe and the material pipe to prevent heat loss and ensure that the recovered heat energy can be utilized to the maximum extent. The bracket is fixedly connected to the bottom of the water pipe and the material pipe to ensure that when the first heat exchange pipe rotates, the water pipe and the material pipe will not be affected and produce obvious shaking, thereby improving the stability of the device. The first heat exchange pipe is provided with a stirring blade, and the stirring blade is located inside the material pipe, which is convenient for stirring and mixing the raw materials, so that the raw materials are heated evenly, the efficiency of raw material heating is improved, the time required for heating the raw materials in the subsequent puffing and drying is reduced, and the production efficiency is improved. The connecting part between the water pipe and the second heat exchange pipe and the connecting part between the bearing and the first heat exchange pipe are both provided with sealing rings to ensure the air tightness of the device.

[0021] (3) By setting up a transmission assembly, the technical effect that can be achieved is that the first gear is meshed with the second gear, the diameters of the first gear and the second gear are the same, a through hole is opened in the middle of the second gear, and the output shaft of the motor passes through the through hole of the second gear, so that the motor can drive the first heat exchange tube to rotate through the cooperation of the second gear and the first gear, thereby facilitating the stirring and mixing of the raw materials.

[0022] (4) By setting the inlet and outlet pipe components, the technical effect that can be achieved is that an air pump is fixedly connected to the air inlet pipe, which is convenient for controlling the waste heat gas to be transported into the waste heat recovery device. When the puffing and drying device is working, the air pump can be turned off to prevent the hot air from leaking out; the second heat exchange pipe is fixedly connected to the air supply pipe, and an electromagnetic valve is fixedly connected to the air supply pipe, which is convenient for controlling the waste heat gas to be transported back to the puffing and drying device.

[0023] (5) Through the coordination of the air inlet pipe, the air delivery pipe, the first heat exchange pipe, the second heat exchange pipe, the air extraction pump and the solenoid valve, the hot air is circulated between the expansion and drying device and the waste heat recovery device, thereby improving the utilization rate of thermal energy and the sustainability of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2 It is a front view of the present invention;

[0027] Figure 3 It is a right side view of the present invention;

[0028] Figure 4 is a first cross-sectional view of the waste heat recovery device in the present invention;

[0029] Figure 5 is a second cross-sectional view of the waste heat recovery device in the present invention;

[0030] Figure 6 is a third cross-sectional view of the waste heat recovery device in the present invention;

[0031] Figure 7 is an internal structure diagram of the waste heat recovery device in the present invention;

[0032] Figure 8 It is a first cross-sectional view of the feeding tube in the present invention;

[0033] Fig. 9 is a second cross-sectional view of the feeding tube in the present invention;

[0034] Fig.10 is a perspective view of a portion of the waste heat recovery device in the present invention;

[0035] Fig.11 It is a structural diagram of the fixing ring, the first gear and the second gear in the present invention;

[0036] Description of main component symbols:

[0037] In the figure: 1. expansion and drying device; 2. waste heat recovery device; 201. first heat exchange tube; 202. water pipe; 203. material pipe; 2031. stirring blade; 204. heat preservation cover; 205. fixing ring; 206. first gear; 207. second gear; 208. motor; 209. material feed pipe; 210. material discharge pipe; 211. water inlet pipe; 212. water outlet pipe; 213. bearing; 214. bracket; 215. second heat exchange tube; 3. vacuum pump; 4. solenoid valve; 5. air inlet pipe; 6. air supply pipe. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside" or "outside" is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0040] Reference Figures 1 to 11 The present invention discloses a waste heat recovery device in a pet food puffing process, comprising a puffing and drying device 1 and a waste heat recovery device 2, wherein the puffing and drying device 1 is fixedly connected to the top of the waste heat recovery device 2, and the doors of the puffing and drying device 1 and the waste heat recovery device 2 are arranged on the same side;

[0041] The waste heat recovery device 2 includes a transmission assembly, a heat exchange assembly and an inlet and outlet pipe assembly. The transmission assembly includes a fixed ring 205, a first gear 206, a second gear 207 and a motor 208. The fixed ring 205 is fixedly sleeved on the heat exchange assembly, the first gear 206 is fixedly sleeved on the fixed ring 205, the second gear 207 is fixedly connected to one side of the motor 208, and the first gear 206 meshes with the second gear 207;

[0042] The heat exchange assembly includes a first heat exchange tube 201, a water tube 202, a feeding tube 203, a heat preservation cover 204, a bearing 213, a bracket 214 and a second heat exchange tube 215. The first heat exchange tube 201 is rotatably connected to the second heat exchange tube 215, the water tube 202 is fixedly sleeved on the second heat exchange tube 215, the first heat exchange tube 201 is rotatably sleeved on the feeding tube 203 through the bearing 213, the heat preservation cover 204 is arranged between the water tube 202 and the feeding tube 203 to prevent heat loss and ensure that the recovered heat energy can be utilized to the maximum extent. The bracket 214 is fixedly connected under the water tube 202 and the feeding tube 203 to ensure that when the first heat exchange tube 201 rotates, the water tube 202 and the feeding tube 203 will not be affected and produce obvious shaking, thereby improving the stability of the device.

[0043] The setting of the heat exchange component can realize that the heat energy recovered by the device can heat water and raw materials at the same time, thereby improving the utilization rate of heat energy and allowing the raw materials to be preheated before puffing and drying, thereby reducing the heating time of the raw materials in the puffing process and improving production efficiency.

[0044] Reference Figures 4 to 7 The inlet and outlet pipe assembly includes a feed pipe 209, a discharge pipe 210, a water inlet pipe 211, a water outlet pipe 212, an air pump 3, an electromagnetic valve 4, an air inlet pipe 5 and an air supply pipe 6. The feed pipe 209 is fixedly connected to the top of one side of the feed pipe 203, the discharge pipe 210 is fixedly connected to the bottom of the other side of the feed pipe 203, the water inlet pipe 211 is fixedly connected to the top of one side of the water pipe 202, and the water outlet pipe 212 is fixedly connected to the bottom of the other side of the water pipe 202.

[0045] Reference Figures 4 to 11 The first heat exchange tube 201 is rotatably connected to the air inlet pipe 5, and the air inlet pipe 5 is fixedly connected to an air pump 3, which is convenient for controlling the waste heat gas to be transported into the waste heat recovery device 2. When the puffing and drying device 1 is working, the air pump 3 can be turned off to prevent the hot air from leaking out; the second heat exchange tube 215 is fixedly connected to the air supply pipe 6, and the air supply pipe 6 is fixedly connected to an electromagnetic valve 4, which is convenient for controlling the waste heat gas to be transported back to the puffing and drying device 1; the first heat exchange tube 201 is provided with a stirring blade 2031, and the stirring blade 2031 is located inside the material placing tube 203, which is convenient for stirring and mixing the raw materials, so that the raw materials are heated evenly, the efficiency of raw material heating is improved, the time required for heating the raw materials in subsequent puffing and drying is reduced, and the production efficiency is improved.

[0046] Through the cooperation of the air inlet pipe 5, the air delivery pipe 6, the first heat exchange pipe 201, the second heat exchange pipe 215, the air extraction pump 3 and the solenoid valve 4, the hot air is circulated between the puffing and drying device 1 and the waste heat recovery device 2, thereby improving the utilization rate of thermal energy and the sustainability of the process.

[0047] Reference Figures 4 to 11 The diameters of the first gear 206 and the second gear 207 are the same; a through hole is opened in the middle of the second gear 207, and the output shaft of the motor 208 passes through the through hole of the second gear 207, so that the motor 208 can drive the first heat exchange tube 201 to rotate through the cooperation of the second gear 207 and the first gear 206, so as to facilitate the stirring and mixing of the raw materials; the connecting part of the water pipe 202 and the second heat exchange tube 215 and the connecting part of the bearing 213 and the first heat exchange tube 201 are both provided with sealing rings to ensure the air tightness of the device.

[0048] Reference Figures 4 to 7 The feed pipe 209 and the discharge pipe 210 are arranged in an L shape, and the feed port of the feed pipe 209 and the discharge port of the discharge pipe 210 are arranged toward the door side of the waste heat recovery device 2; the water inlet pipe 211 and the water outlet pipe 212 are arranged in an L shape, and the water inlet of the water inlet pipe 211 and the water outlet of the water outlet pipe 212 are arranged toward the air supply pipe 6 side of the waste heat recovery device 2.

[0049] The working principle and use process of the present invention are as follows: the motor 208 is started, the motor 208 drives the second gear 207 to rotate, the second gear 207 drives the first gear 206 to rotate, the first gear 206 drives the first heat exchange tube 201 to rotate, and the vacuum pump 3 is controlled to transport the residual heat in the puffing and drying device 1 to the first heat exchange tube 201 through the air inlet pipe 5. When the puffing and drying device 1 is working, the vacuum pump 3 is controlled to be closed to prevent the hot air from leaking.

[0050] The raw materials that need to be expanded and dried are placed in the placing pipe 203 through the feeding pipe 209. The first heat exchange pipe 201 rotates to drive the stirring blade 2031 to rotate, so as to stir, mix and preheat the raw materials. The preheated raw materials are taken out through the discharging pipe 210 and placed in the expanding and drying device 1.

[0051] While the raw materials are preheated, water is transported to the second heat exchange tube 215 through the water inlet pipe 211 to heat the water, and the hot water is transported to the outside through the water outlet pipe 212 for subsequent work requiring hot water.

[0052] The solenoid valve 4 is controlled to transport the waste heat gas used by the waste heat recovery device 2 back to the expansion and drying device 1 through the air supply pipe 6, and then it is continuously used in the expansion and drying process, so that the waste heat gas is recycled.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A device for recovering waste heat in a pet food puffing process, characterized in that: It comprises an expansion drying device (1) and a waste heat recovery device (2), wherein the expansion drying device (1) is fixedly connected to the top of the waste heat recovery device (2), and the doors of the expansion drying device (1) and the waste heat recovery device (2) are arranged on the same side; The waste heat recovery device (2) comprises a transmission component, a heat exchange component and an inlet and outlet pipe component, the transmission component comprises a fixed ring (205), a first gear (206), a second gear (207) and a motor (208), the fixed ring (205) is fixedly sleeved on the heat exchange component, the first gear (206) is fixedly sleeved on the fixed ring (205), the second gear (207) is fixedly connected to one side of the motor (208), and the first gear (206) meshes with the second gear (207); The heat exchange assembly comprises a first heat exchange tube (201), a water tube (202), a material tube (203), a heat preservation cover (204), a bearing (213), a bracket (214), and a second heat exchange tube (215); the first heat exchange tube (201) is rotatably connected to the second heat exchange tube (215); the water tube (202) is fixedly sleeved on the second heat exchange tube (215); the first heat exchange tube (201) is rotatably sleeved on the material tube (203) via the bearing (213); the heat preservation cover (204) is arranged between the water tube (202) and the material tube (203); and the bracket (214) is fixedly connected below the water tube (202) and the material tube (203); The inlet and outlet pipe assembly comprises a feed pipe (209), a discharge pipe (210), a water inlet pipe (211), a water outlet pipe (212), an air pump (3), an electromagnetic valve (4), an air inlet pipe (5) and an air supply pipe (6); the feed pipe (209) is fixedly connected to the upper part of one side of the feed pipe (203); the discharge pipe (210) is fixedly connected to the lower part of the other side of the feed pipe (203); the water inlet pipe (211) is fixedly connected to the upper part of one side of the water pipe (202); and the water outlet pipe (212) is fixedly connected to the lower part of the other side of the water pipe (202).

2. The device for recovering waste heat in a pet food puffing process according to claim 1, characterized in that: The first heat exchange tube (201) is rotatably connected to the air intake pipe (5), and an air extraction pump (3) is fixedly connected to the air intake pipe (5).

3. The device for recovering waste heat in a pet food puffing process according to claim 1, characterized in that: The second heat exchange tube (215) is fixedly connected to the air supply tube (6), and the solenoid valve (4) is fixedly connected to the air supply tube (6).

4. The device for recovering waste heat in a pet food puffing process according to claim 1, characterized in that: The first heat exchange tube (201) is provided with a stirring blade (2031), and the stirring blade (2031) is located inside the material placing tube (203).

5. The device for recovering waste heat in a pet food puffing process according to claim 1, characterized in that: The diameters of the first gear (206) and the second gear (207) are the same.

6. The device for recovering waste heat in a pet food puffing process according to claim 5, characterized in that: A through hole is provided in the middle of the second gear (207), and the output shaft of the motor (208) passes through the through hole of the second gear (207).

7. The device for recovering waste heat in a pet food puffing process according to claim 1, characterized in that: The connection portion between the water pipe (202) and the second heat exchange tube (215) and the connection portion between the bearing (213) and the first heat exchange tube (201) are both provided with sealing rings.

8. The device for recovering waste heat in a pet food puffing process according to claim 1, characterized in that: The feed pipe (209) and the discharge pipe (210) are arranged in an L shape, and the feed port of the feed pipe (209) and the discharge port of the discharge pipe (210) are arranged toward the door side of the waste heat recovery device (2).

9. The device for recovering waste heat in a pet food puffing process according to claim 1, characterized in that: The water inlet pipe (211) and the water outlet pipe (212) are arranged in an L shape, and the water inlet of the water inlet pipe (211) and the water outlet of the water outlet pipe (212) are arranged in a direction toward the air supply pipe (6) side of the waste heat recovery device (2).

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