A drying machine for the harmless treatment of animal carcasses

Abstract

This invention provides a drying machine for the harmless treatment of animal carcasses, belonging to the field of drying technology. It includes a heating chamber, heating channels, a circulating heating layer, a covered heat-conducting oil layer, a covered heat-conducting smoke layer, and an internal heat-conducting structure. This drying machine for the harmless treatment of animal carcasses, in conjunction with the covered heat-conducting oil layer and the internal heat-conducting structure, forms a dual heating system based on circulating heat-conducting oil heating. A covered heat-conducting smoke layer is set within the covered heat-conducting oil layer. The smoke channels within the covered heat-conducting smoke layer are arranged symmetrically and directly connected to the heating channels. Combined with the heating channels, the heat-conducting oil within the covered heat-conducting oil layer is reheated from the center, significantly improving the preheating speed of the heating chamber and the overall heating uniformity. This effectively improves the uniformity and efficiency of drying, reduces heat loss and its impact on drying uniformity and efficiency, and facilitates more precise temperature control, thereby enhancing the drying capacity.

Description

Technical Field

[0001] This invention relates to the field of drying technology, specifically to a drying machine for the harmless treatment of animal carcasses. Background Technology

[0002] The harmless disposal of animal carcasses is a crucial link in livestock and poultry farming and public health control. Its core purpose is to achieve resource utilization through industrialized, large-scale processing, preventing environmental pollution and the spread of animal diseases. In the entire process, drying is a core step, primarily involving high-temperature sterilization and dehydration of animal carcasses in a sealed container to kill pathogens and effectively reduce moisture content. The efficiency and effectiveness of drying not only affect the overall operational efficiency of the harmless disposal system but also decisively impact the environmental quality of subsequent processes such as crushing, oil separation, and organic fertilizer preparation.

[0003] Currently, existing drying equipment still has significant limitations in terms of drying efficiency, effectiveness, and heat energy utilization, making it difficult to further improve overall processing capacity. Specifically: 1. Bottom-heated drying equipment has a single heating path, resulting in significant spatial temperature differences during heat conduction. This leads to uneven heating of the material, easily causing localized overheating and undried areas. Furthermore, the preheating time and overall drying cycle of bottom-heated equipment are relatively long, reducing processing efficiency and accelerating thermal fatigue of equipment components due to excessively high localized temperatures, thus shortening the equipment's lifespan.

[0004] 2. Covered circulating heating equipment (such as heat transfer oil or high-temperature steam circulating heating systems) can achieve overall heating of the processing chamber and improve heating efficiency to a certain extent. However, there is significant heat loss during the circulation process, especially in large drying equipment where the circulation path is long and the heat loss is more severe. This further weakens the uniformity of heat transfer, resulting in uneven temperature field distribution of the overall equipment. Consequently, the material is heated unevenly, and the actual temperature field distribution is difficult to keep in line with the set parameters, making it difficult to effectively achieve temperature control accuracy.

[0005] In summary, existing animal carcass drying technologies generally suffer from problems such as insufficient heating uniformity, significant heat loss, and difficulty in achieving precise temperature control, which hinders further improvements in drying capacity. Summary of the Invention

[0006] This invention provides a drying machine for the harmless treatment of animal carcasses, comprising a heating chamber, a heating flue, a covered heat-conducting oil layer, a covered heat-conducting smoke layer, and an internal heat-conducting structure. The heating flue is axially arranged at the bottom of the heating chamber and covered with a circulating heating layer. The covered heat-conducting oil layer includes a heat-conducting oil cavity with an oil inlet and an oil outlet. The heat-conducting oil cavity covers the outside of the heating chamber, and its bottom area is located between the heating flue and the heating chamber. The heating flue provides secondary heating to the heating oil as it circulates through the middle of the heat-conducting oil cavity. The covered heat-conducting smoke layer includes several flues laid on the heating chamber and located within the heat-conducting oil cavity, with each flue being evenly distributed. The system consists of two groups, symmetrically arranged on the heating chamber with the heating flue as the center of symmetry. The flue inlet of each flue is connected to the heating flue. The internal heat-conducting structure includes a main shaft with a central flow channel, a double-channel rotary joint connected to the main shaft, and a heat-conducting pipe between the double-channel rotary joint and the main shaft. The heat-conducting pipes are arranged in a spiral pattern in the heating chamber. The circulation path of the heat-conducting oil is as follows: double-channel rotary joint, main shaft, heat-conducting pipe, double-channel rotary joint, oil inlet, heat-conducting oil chamber, oil outlet, and circulating heating layer. The heat-conducting pipes are equipped with deflectors, which are spirally distributed and used to rotate and turn the material in coordination with the internal heat-conducting structure.

[0007] In one possible implementation, both the oil inlet and the oil outlet are located at the top of the heating chamber. After the heat transfer oil enters the heat transfer oil chamber through the oil inlet, it first flows downward along the circumference of the heating chamber, then flows upward and finally flows out through the oil outlet. The oil inlet and the oil outlet are respectively close to both ends of the heating chamber.

[0008] In one possible implementation, the heat transfer oil cavity includes an intermediate cavity and side cavities symmetrically distributed around the intermediate cavity as the center of symmetry. The intermediate cavity is located between the heating fire channel and the heating chamber. The oil inlet is connected to one of the side cavities, and the oil outlet is connected to the other side cavity. Each side cavity is provided with several baffles. The baffles divide the space within the side cavities, causing the flow path of the heat transfer oil to be reciprocating and bending.

[0009] In one possible implementation, the dual-channel rotary joint includes a connection structure with a flow channel one and a flow channel two. The heat transfer oil enters the central flow channel from the flow channel two, and then enters the heat transfer pipes from the central flow channel. After that, the heat transfer oil in the heat transfer pipes enters the flow channel one.

[0010] In one possible implementation, the heating chamber is provided with a centralized transfer area, which is provided with an exhaust port. The exhaust ports of the flue are all connected to the centralized transfer area, and the centralized transfer area and the exhaust port are both close to the same end of the heating chamber.

[0011] One possible implementation method also includes a negative pressure system, which extracts the high-temperature steam in the heating chamber and sends it to the exhaust gas treatment system. The treated exhaust gas is then sent to the heating flue for combustion, and then the gas in the heating flue is extracted and sent to the exhaust gas treatment system after passing through a covered heat-conducting smoke layer.

[0012] In one possible implementation, an insulation layer is provided over the covering heat-conducting oil layer and the circulating heating layer.

[0013] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: According to the animal carcass harmless treatment drying machine provided in the embodiments of the present invention, a covered heat-conducting oil layer and an internal heat-conducting structure cooperate to form an internal and external dual heating system based on heat-conducting oil circulation heating. A covered heat-conducting smoke layer is set inside the covered heat-conducting oil layer. The covered heat-conducting smoke layer heats the heating chamber and the covered heat-conducting oil layer by utilizing and guiding the exhaust gas in the heating flue. On the one hand, this compensates for the heat loss of the entire heating system and improves the thermal efficiency; on the other hand, the symmetrically arranged flue and the covered heat-conducting oil layer can significantly improve the heating chamber... The preheating speed is high, and the flues, which are symmetrically arranged and directly connected to the heating flues, combine with the heating flues to perform secondary heating of the heat transfer oil in the covered heat transfer oil layer from the middle. This not only reduces heat loss but also further compensates for heat loss, significantly improving the overall heating uniformity. This effectively improves the uniformity and efficiency of drying, reduces heat loss and its impact on drying uniformity and efficiency, and facilitates more precise temperature control, enhancing the drying capacity. At the same time, the internal heat transfer structure uses multiple heat transfer pipes arranged in a spiral pattern for heating, combined with a stirring and pushing plate to further improve the heating uniformity and efficiency of the heating chamber. Attached Figure Description

[0014] Figure 1 This is a first-view overall structural schematic diagram of an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0015] Figure 2 This is a second-view overall structural schematic diagram of an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0016] Figure 3 This is a partial structural schematic diagram from a first-view perspective of an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of a centralized transfer area of ​​an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0018] Figure 5This is a schematic diagram of the heating chamber, heating channel, circulating heating layer, and heat-conducting oil cavity of an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0019] Figure 6 This is a schematic diagram of the flue structure of an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0020] Figure 7 This is a schematic diagram of the heat conduction pipe of a drying machine for harmless treatment of animal carcasses provided in an embodiment of the present invention.

[0021] Figure 8 This is a schematic diagram of the flow channel one, flow channel two and central flow channel of an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0022] Figure 9 This is a schematic diagram of the flow path of heat transfer oil in the side cavity of an animal carcass harmless treatment drying machine provided in an embodiment of the present invention.

[0023] In the diagram: 1. Heating chamber; 2. Heating flue; 3. Circulating heating layer; 4. Oil inlet; 5. Oil outlet; 6. Heat-conducting oil chamber; 61. Intermediate cavity; 62. Side cavity; 63. Partition; 64. Flow port; 7. Flue; 8. Smoke inlet; 9. Dual-channel rotary joint; 91. Flow channel one; 92. Flow channel two; 93. Connecting structure; 10. Main shaft; 11. Heat-conducting pipe; 12. Baffle plate; 13. Central transfer area; 14. Discharge outlet; 15. Smoke outlet; 16. Central flow channel; 17. Insulation layer. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 A drying machine for the harmless treatment of animal carcasses includes a heating chamber 1 and a heating channel 2. The heating channel 2 is arranged along the axial direction of the heating chamber 1 at the bottom of the heating chamber 1, and a circulating heating layer 3 (such as...) is provided on the heating channel 2. Figure 5As shown), the heat transfer oil is rapidly heated through the circulating heating layer 3. The heating chamber 1 is equipped with a covered heat transfer smoke layer and a covered heat transfer oil layer. The covered heat transfer smoke layer is located within the covered heat transfer oil layer, combined with... Figure 5 and Figure 6 As shown, the covered heat-conducting fume layer includes several flues 7, which are divided into two groups and symmetrically distributed on the left and right sides, covering the heating chamber 1. The inlets 8 of the flues 7 are directly connected to the heating flue 2, allowing the exhaust gas in the heating flue 2 to be discharged from the equipment through the flues 7 and subsequently treated by the exhaust gas treatment system to meet emission standards. During the exhaust gas discharge through the flues 7, the heating chamber 1 and the covered heat-conducting oil layer are heated, enabling rapid heating of the heating chamber 1 and significantly shortening the preheating time. The covered heat-conducting oil layer includes a heat-conducting oil cavity 6 (e.g., with an oil inlet 4 and an oil outlet 5). Figure 3 As shown), the heat-conducting oil cavity 6 includes a central cavity 61 and side cavities 62 symmetrically distributed on the left and right sides (as shown). Figure 5 As shown in the diagram, the left flue 7 is located within the left side cavity 62, and the right flue 7 is located within the right side cavity 62. The intermediate cavity 61 connects the left and right side cavities 62. The oil inlet 4 connects to the right side cavity 62, and the oil outlet 5 connects to the left side cavity 62. Heat transfer oil enters the right side cavity 62 through the oil inlet 4, then passes through the intermediate cavity 61 and enters the left side cavity 62, before flowing out through the oil outlet 5. The intermediate cavity 61 is located between the heating flue 2 and the heating chamber 1. On one hand, it separates the heating flue 2 from the heating chamber 1, preventing the heating flue 2 from directly heating the heating chamber 1, which would affect the heating uniformity and service life of the heating chamber 1. On the other hand, the heating flue 2... The heat transfer oil in the covered heat transfer oil layer is reheated from the middle to compensate for the heat loss during the circulation process and improve the uniformity of heating. The covered heat transfer smoke layer and the covered heat transfer oil layer work together to heat the heating chamber 1 and the covered heat transfer oil layer. The covered heat transfer smoke layer is used to rapidly heat the heating chamber 1 and the covered heat transfer oil layer. At the same time, the covered heat transfer oil layer is used to effectively reduce the heat loss of the covered heat transfer smoke layer during the heat transfer process. Overall, the heating chamber 1 is significantly improved in terms of preheating speed, heating uniformity and stability, and heat loss and its impact on heating uniformity are effectively reduced. This improves the drying efficiency, optimizes the drying effect, achieves more precise temperature control, and enhances the overall ability of harmless treatment of animal carcasses.

[0026] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8The heating chamber 1 is equipped with an internal heat-conducting structure. This internal structure utilizes heat-conducting oil to heat the interior of the heating chamber 1, combining with the external covering layer of heat-conducting oil and the covering layer of heat-conducting smoke to form a dual-heating system that significantly improves the efficiency and effectiveness of drying. Figure 7 and Figure 8 As shown, the internal heat-conducting structure includes a main shaft 10 with an internal central flow channel 16. The main shaft 10 is rotatably mounted on the heating chamber 1, and a dual-channel rotary joint 9 is connected to the front end of the main shaft 10. A heat-conducting pipe 11 is connected between the dual-channel rotary joint 9 and the main shaft 10. There are three heat-conducting pipes 11 arranged in a spiral pattern inside the heating chamber 1. Figure 8 As shown, the dual-channel rotary joint 9 includes a connecting structure 93 with a first flow channel 91 and a second flow channel 92. The first flow channel 91 and the second flow channel 92 are independent of each other, and the second flow channel 92 is connected to the central flow channel 16 through an oil pipe (not shown in the figure) to form an oil inlet path. The first flow channel 91 is directly connected to the front end of the heat-conducting pipe 11 to form an oil outlet path. The oil inlet path and the oil outlet path are independent of each other and do not interfere with each other. The specific circulation path is as follows: hot oil enters the central flow channel 16 from the front end through the second flow channel 92, and then enters the heat-conducting pipe 11 from the rear end of the central flow channel 16. Heat is transferred through the heat-conducting pipe 11 in a spiral direction, further improving the heating uniformity of the heating chamber 1. After that, the heat-conducting oil uniformly enters the first flow channel 91, and the first flow channel 91 is connected to the oil inlet 4 through a connecting pipe (e.g., Figure 4 As shown), the heat transfer oil enters the right-side side cavity 62 through the oil inlet 4, then passes through the middle cavity 61 and enters the left-side side cavity 62 (as shown). Figure 5 As shown), the oil then flows out from outlet 5 into the circulating heating layer 3 for heating (as shown). Figure 2 As shown in the figure), it then passes through the circulating oil pump (not shown in the figure), the oil tank (not shown in the figure), and then enters the flow channel 2 92 again, and continues to circulate in this order. This completes a complete oil circuit circulation heating system.

[0027] See Figure 5 and Figure 7 A baffle plate 12 is welded onto the heat conduction pipe 11. The baffle plate 12 is spirally distributed. During the drying process, as the main shaft 10 rotates, the baffle plate 12 moves and flips the material, further improving the drying efficiency and uniformity of the material. As the main shaft 10 rotates forward, the material gathers at one end of the heating chamber 1 to produce a squeezing effect, which improves the drying efficiency in the early stage of drying. As the main shaft 10 rotates in reverse, the material moves and gathers at the other end. This process is repeated to further improve the drying efficiency. During the discharge process, the material can be discharged from the main unit by reversing the rotation, which improves the discharge efficiency and the efficiency of continuous drying.

[0028] See Figure 5 and Figure 9Each side cavity 62 is provided with several baffles 63. The baffles 63 divide the space inside the side cavity 62, causing the flow path of the heat transfer oil to be reciprocated in a tortuous shape. Taking the right side cavity 62 as an example, for example... Figure 9 As shown, the heating oil enters the side cavity 62 through the upper oil inlet 4 and flows back and forth along the path line as indicated by the arrow in the figure, which helps to further improve the uniformity of heating. The middle cavity 61 has flow ports 64 on both the right front and left rear sides. The heating oil in the right side cavity 62 flows through the flow port 64 on the right front side (e.g., ...). Figure 5 (As shown) After entering the middle cavity 61, it enters the left side cavity 62 through the left rear flow port 64.

[0029] See Figure 1 and Figure 5 The circulating heating layer 3 and the covered heat-conducting oil layer are covered with an insulation layer 17, which reduces heat loss on the one hand and prevents high-temperature burns on the other.

[0030] See Figure 3 , Figure 4 , Figure 5 and Figure 6 The heating chamber 1 is equipped with a centralized transfer zone 13, which has an exhaust port 14. The exhaust ports 15 of each flue 7 are connected to the centralized transfer zone 13, facilitating the centralized discharge of exhaust gas. The centralized transfer zone 13 and the exhaust ports 8 are both located near the same end of the heating chamber 1, making the exhaust gas flow path more compact and efficient. By symmetrically arranging multiple flues 7 on both sides of the heating chamber 1, the flow path of the exhaust gas is effectively shortened while maintaining the same installation area, significantly reducing the impact of heat loss on heating speed and effect, and improving heating efficiency. Figure 5 and Figure 6 As shown, the flues 7 are laid in a bent manner on the outer wall of the heating chamber 1. Each flue 7 is directly connected to the heating flue 2, allowing the exhaust gas in the heating flue 2 to be discharged through each flue 7. Compared with the single bent flue 7, this symmetrical arrangement of multiple flues 7 not only significantly improves the uniformity of heating but also effectively reduces the impact of heat loss on the heating speed and heating effect, thereby improving the overall heating efficiency and heating effect of the system. The heating chamber 1 is equipped with a negative pressure system (using existing technology). The negative pressure system extracts the high-temperature steam from the heating chamber 1 and sends it to the waste treatment system. The treated exhaust gas is then sent to the heating flue 2 for secondary combustion to thoroughly remove harmful substances. The combustion exhaust gas is then extracted from the heating flue and passed through a covered heat-conducting smoke layer before entering the subsequent exhaust gas treatment system for further treatment. The high-temperature exhaust gas is used to transfer heat to the heat transfer oil, improving thermal efficiency.

[0031] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A drying machine for the harmless treatment of animal carcasses, characterized in that: It includes a heating chamber; a heating channel, which is axially arranged at the bottom of the heating chamber and covered with a circulating heating layer; Covered heat transfer oil layer: includes a heat transfer oil cavity with an oil inlet and an oil outlet. The heat transfer oil cavity covers the heating chamber and the bottom area of ​​the heat transfer oil cavity is located between the heating fire channel and the heating chamber. The heating fire channel heats the heat transfer oil a second time when the heating oil circulates through the middle of the heat transfer oil cavity. Covered heat-conducting smoke layer: including flues laid on the heating chamber and located in the heat-conducting oil cavity. There are several flues, each divided into two groups, and they are symmetrically laid on the heating chamber with the heating fire channel as the center of symmetry. The smoke inlet of each flue is connected to the heating fire channel. The internal heat conduction structure includes a main shaft with an internal central flow channel, a dual-channel rotary joint connected to the main shaft, and a heat conduction pipe between the dual-channel rotary joint and the main shaft. The heat conduction pipes are numerous and arranged in a spiral pattern inside the heating chamber. The circulation path of the heat transfer oil is as follows: dual-channel rotary joint, main shaft, heat transfer pipe, dual-channel rotary joint, oil inlet, heat transfer oil chamber, oil outlet, and circulating heating layer. The heat-conducting pipe is equipped with a baffle plate, which is distributed in a spiral shape and is used to rotate and turn the material in conjunction with the internal heat-conducting structure.

2. The animal carcass drying machine for harmless treatment according to claim 1, characterized in that: Both the oil inlet and the oil outlet are located at the top of the heating chamber. After the heat transfer oil enters the heat transfer oil chamber through the oil inlet, it first flows downward along the circumference of the heating chamber, then flows upward and finally flows out through the oil outlet. The oil inlet and the oil outlet are located near the two ends of the heating chamber, respectively.

3. The animal carcass harmless treatment drying machine according to claim 1 or 2, characterized in that: The heat transfer oil chamber includes an intermediate chamber and side chambers symmetrically distributed around the intermediate chamber. The intermediate chamber is located between the heating fire channel and the heating chamber. The oil inlet is connected to one of the side chambers, and the oil outlet is connected to the other side chamber. Each side chamber is equipped with several baffles. The baffles divide the space within the side chambers, causing the flow path of the heat transfer oil to be reciprocating and bending.

4. The animal carcass drying machine for harmless treatment according to claim 1, characterized in that: The dual-channel rotary joint includes a connection structure with a flow channel one and a flow channel two. The heat transfer oil enters the central flow channel from the flow channel two, and then enters the heat transfer pipes from the central flow channel. After that, the heat transfer oil in the heat transfer pipes enters the flow channel one.

5. The animal carcass harmless treatment drying machine according to claim 1, characterized in that: The heating chamber is equipped with a centralized transfer area, which has an exhaust port. The exhaust port of the flue is connected to the centralized transfer area, and the centralized transfer area and the exhaust port are both close to the same end of the heating chamber.

6. The animal carcass drying machine for harmless treatment according to claim 1, characterized in that: It also includes a negative pressure system, which extracts the high-temperature steam in the heating chamber and sends it to the exhaust gas treatment system. The treated exhaust gas is then sent to the heating flue for combustion. After that, the gas in the heating flue is extracted and sent to the exhaust gas treatment system after passing through the covered heat-conducting smoke layer.

7. The animal carcass harmless treatment drying machine according to claim 1, characterized in that: The heat-conducting oil layer and the circulating heating layer are covered with an insulation layer.

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