Feed production system

Abstract

The utility model discloses a feed production system which comprises a plurality of granulation units connected in parallel, and each granulation unit at least comprises a circular mold granulator, heat preservation equipment and cooling equipment which are connected in sequence; the plurality of material lifting and conveying units are arranged corresponding to the granulation units and are used for receiving abnormal materials discharged from the circular mold granulator, and the abnormal materials are treated and then are conveyed into the circular mold granulator again for granulation operation; the hot air unit is connected with the material lifting and conveying unit through an air conveying pipe; the hot air unit comprises an air blower and a heat exchanger and is used for dehumidifying abnormal materials in the material lifting and conveying unit. According to the scheme, the hot air unit can dehumidify the abnormal materials in the material lifting and conveying unit, and therefore the problem that the abnormal materials are condensed to be hung on the wall or go mouldy is avoided. In addition, according to the scheme, a plurality of granulation units can be controlled in a centralized and efficient mode, and then the granulation efficiency is improved.

Description

Technical Field

[0001] This disclosure generally relates to the field of feed production technology. More specifically, this disclosure relates to a feed production system. Background Technology

[0002] In the feed processing industry, sterilization is a crucial step. Currently, moist heat sterilization is a commonly used method in feed processing, which achieves sterilization by introducing steam into the powdered feed. However, moist heat sterilization faces several technical bottlenecks and problems that urgently need to be addressed.

[0003] First, during the start-up phase of feed processing, the temperature of the powdered feed often fails to reach the minimum temperature required for moist heat sterilization. In this case, the powdered feed needs to be removed from the pelleting system for additional processing before being returned to the machine. This not only increases the complexity of the production process but may also lead to a decrease in production efficiency.

[0004] Secondly, during the production process, the temperature of the powder may drop due to unstable steam quality or equipment malfunctions, a phenomenon known as "temperature drop." The material that has cooled down also needs to be processed through the granulation system before it can be returned to the machine, further increasing the difficulty and cost of material handling during production.

[0005] Currently, there are three main methods for handling the aforementioned materials. The first is to cool and dehumidify the material using a cooler before transporting it back to the pelleting system. While this method effectively handles dehumidified materials, it requires dedicated cooling equipment, resulting in high investment costs. The second method involves directly returning the hot, wet material to the mixer or pelleting silo in the feed production line. Although this method saves on additional equipment investment, the steam emitted by the hot, wet material condenses inside the equipment, causing material to adhere to the walls. This not only requires regular equipment cleaning but also easily leads to mold growth, affecting feed quality and safety. The third method involves drying the hot, wet material using dedicated drying equipment before transporting it back to the pelleting system. While this method effectively solves the problem of hot, wet materials, it typically only works with one pelleting machine or requires multiple conveyor systems to share the drying equipment. This method not only has high investment costs but also results in material adhering to the walls of the conveyor or storage silo due to condensation, further increasing maintenance and cleaning workload during production.

[0006] In view of this, there is an urgent need to provide a feed production system that can efficiently and economically solve the problem of recycling and disposing of abnormal materials. Utility Model Content

[0007] In order to at least address one or more of the technical problems mentioned above, this disclosure proposes a feed production system in several aspects that can efficiently and economically solve the problems of condensation and mold growth encountered during the recovery of abnormal materials.

[0008] In a first aspect, this disclosure provides a feed production system, comprising: a plurality of pelleting units connected in parallel, each pelleting unit including at least a ring die pellet mill, a heat preservation device, and a cooling device connected in sequence; a plurality of material conveying units corresponding to the pelleting units, which are used to receive abnormal material discharged from the ring die pellet mill, the abnormal material being processed and then re-conveyed to the ring die pellet mill for pelleting; and a hot air unit connected to the material conveying units via air ducts; the hot air unit including a blower and a heat exchanger, and used to dehumidify the abnormal material in the material conveying units.

[0009] In some embodiments, the material conveying unit includes at least a material feeder, an air supply pipe, a cyclone separator, and a shut-off fan; the material feeder is connected to the outlet of the ring die pellet mill via a buffer pipe, and the shut-off fan is connected to the inlet of the ring die pellet mill.

[0010] In some embodiments, the hot air unit includes a main connecting pipe and a plurality of connecting branch pipes connected to the main connecting pipe, and each connecting branch pipe is provided with a valve for opening or closing the main connecting pipe and the connecting branch pipe; the main connecting pipe is connected to the heat exchanger, and the plurality of connecting branch pipes are respectively connected to the feeders on a plurality of feeding and conveying units.

[0011] In some embodiments, the feed production system further includes an induced draft fan that provides power to the feeding and conveying unit, wherein the air volume of the induced draft fan is greater than that of the blower; and both the connecting branch pipe and the buffer pipe are provided with air supply ports.

[0012] In some embodiments, a plurality of spaced pulse tubes are connected to the air supply duct between the feeder and the cyclone separator.

[0013] In some embodiments, the feed production system further includes a ring die flushing unit for automatically flushing the ring dies on the ring die pellet mill; the ring die flushing unit includes a buffer hopper and a screw conveyor, wherein the screw conveyor is used to transport oil stored in the buffer hopper to the ring die pellet mill to flush the ring dies.

[0014] In some embodiments, the oil from the ring die flushing unit is flushed out of the ring die pellet mill and then enters the material conveying unit through the buffer pipe for recycling.

[0015] In some embodiments, the feed production system further includes a negative pressure cleaning unit and an exhaust gas dust removal unit connected in sequence; the dust suction head in the negative pressure cleaning unit is located at the position of the ring die pellet mill, and is used to adsorb the dust generated during the pelleting process of the ring die pellet mill into the exhaust gas dust removal unit.

[0016] In some embodiments, the negative pressure cleaning unit includes at least one main dust removal pipe and a plurality of dust removal branch pipes connected to the main dust removal pipe. Each dust removal branch pipe is provided with a valve for opening or closing the main dust removal pipe and the dust removal branch pipe. The main dust removal pipe is connected to the exhaust gas dust removal unit, and the dust removal branch pipe is connected to the suction head.

[0017] In some embodiments, the exhaust gas dust removal unit includes a pulse bag filter and a collection device connected thereto. The pulse bag filter is used to purify dust, and the collection device is used to collect the separated dust.

[0018] The feed production system described above, in this embodiment, employs a material conveying unit to collect non-compliant materials from the pelleting unit. These materials are then processed by a hot air unit, which dehumidifies them before returning them directly to the pelleting unit for re-granulation. Throughout this process, the non-compliant materials do not require temporary storage or additional mechanical conveying, effectively avoiding potential problems such as condensation, wall adhesion, and mold growth that can occur during material storage and mechanical conveying. This solution ensures that non-compliant materials are dried immediately, reducing equipment maintenance costs while also achieving centralized and efficient control of multiple pelleting units, thus improving pelleting efficiency. Attached Figure Description

[0019] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 A schematic diagram of a feed production system according to an embodiment of this disclosure is shown;

[0021] Figure 2 for Figure 1 Enlarged view at point X;

[0022] Figure 3 for Figure 1 Enlarged view of point Y in the middle;

[0023] Figure 4 for Figure 1 Enlarged view at point Z;

[0024] Figure 5 for Figure 1 A magnified view of point H in the middle.

[0025] In the diagram: 100, Feed production system;

[0026] 101. Granulation unit; 102. Material conveying unit; 103. Hot air unit; 104. Ring die rinsing unit; 105. Negative pressure cleaning unit; 106. Exhaust gas dust removal unit; 107. Exhaust fan;

[0027] 1011. Ring die pellet mill; 1012. Insulation equipment; 1013. Cooling equipment; 1014. Silo;

[0028] 1021. Feeder; 1022. Airlock; 1023. Pulse tube; 1024. Buffer tube; 1025. Air supply port; 1026. Air supply port;

[0029] 1031. Blower; 1032. Heat exchanger; 1033. Main connecting pipe; 1034. Branch connecting pipe;

[0030] 1051. Main dust collector pipe; 1052. Branch dust collector pipe;

[0031] 1041. Screw conveyor;

[0032] 1061. Pulse jet bag filter. Detailed Implementation

[0033] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0034] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0035] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0036] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0037] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0038] like Figure 1 - Figure 3 As shown, this disclosure provides a feed production system 100, including: a plurality of pelleting units 101 connected in parallel, each pelleting unit 101 including at least a ring die pellet mill 1011, a heat preservation device 1012, and a cooling device 1013 connected in sequence; a plurality of material conveying units 102 corresponding to the pelleting units 101, which are used to receive abnormal materials discharged from the ring die pellet mill 1011, the abnormal materials being processed and then re-conveyed to the ring die pellet mill 1011 for pelleting; and a hot air unit 103, which is connected to the material conveying units 102 through an air duct; the hot air unit 103 includes a blower 1031 and a heat exchanger 1032, and is used to dehumidify the abnormal materials in the material conveying units 102.

[0039] The feed production system 100 in this solution aims to handle abnormal materials during the feed production process, preventing mold growth or condensation on the walls due to moisture and heat. The system mainly includes multiple parallel-connected pelleting units 101, multiple feeding and conveying units 102 corresponding to the pelleting units 101, and a hot air unit 103. Each pelleting unit 101 includes a ring die pellet mill 1011, a heat preservation device 1012, and a cooling device 1013 connected sequentially via pipelines. The ring die pellet mill 1011 is used to form powder into granules. The material then passes through pipelines into the heat preservation device 1012 for heat preservation and storage, then into the cooling device 1013 for cooling, and finally exits the pelleting unit 101 via a fan. This solution also includes multiple feeding and conveying units 102, with each feeding and conveying unit 102 corresponding to a pelleting unit 101. That is, the number of pelleting units 101 in this solution is the same as the number of feeding and conveying units 102. In use, the material conveying unit 102 receives abnormal material discharged from the corresponding ring die pellet mill 1011. This abnormal material is processed in the material conveying unit 102 and then re-conveyed back to the ring die pellet mill 1011 for pelletizing. The hot air unit 103 in this design includes a blower 1031 and a heat exchanger 1032, wherein the heat exchanger 1032 is connected to the material conveying unit 102 via an air duct. In use, the hot air generated by the hot air unit 103 can directly act on the material in the material conveying unit 102 through the air duct, absorbing moisture from the material and thus achieving dehumidification.

[0040] It is worth noting that the abnormal materials mentioned above include both machine head materials that do not meet the requirements during the production process and materials whose temperature does not meet the requirements during the production process.

[0041] Those skilled in the art will understand that although the feed production system 100 provided in this solution includes multiple pelleting units 101, these pelleting units 101 are isolated from each other by butterfly valves. In actual use, users can flexibly decide which pelleting units 101 to operate for pelleting operations by controlling the opening and closing of the butterfly valves according to specific needs. At the same time, users can also control the operation of the feeding and conveying units 102 corresponding to the pelleting units 101 through the butterfly valves. In this way, the system can achieve precise control of the production process, improving production efficiency and flexibility.

[0042] The feed production system 100 disclosed herein uses a hot air unit 103 to dehumidify the hot and humid abnormal material in the feeding and conveying unit 102, thereby preventing the abnormal material from becoming moldy, deteriorating, or adhering to the walls inside the equipment. Furthermore, because this solution incorporates multiple pelleting units 101 and multiple feeding and conveying units 102, it can simultaneously control multiple pelleting units 101 to perform pelleting operations, thus improving pelleting efficiency.

[0043] In one specific implementation scheme, the temperature of the room where the production system is located needs to be detected before the hot air unit 103 is turned on. When the room temperature is greater than or equal to the first preset temperature, it indicates that the ambient temperature is high enough to prevent water vapor condensation, so the hot air unit 103 is not turned on. When the room temperature is greater than the second preset temperature but less than the first preset temperature, only one set of heat exchangers 1032 is turned on for heat exchange, and this set of heat exchangers 1032 exchanges heat through condensate. When the room temperature is less than the second preset temperature, both sets of heat exchangers 1032 are turned on simultaneously for heat exchange, one set of heat exchangers 1032 exchanges heat through steam, and the other set of heat exchangers 1032 exchanges heat through condensate, to ensure that the air temperature reaches the target requirement. The solution provided by this scheme can flexibly adjust the operating mode of the hot air unit 103 according to different production environments and material characteristics to achieve the best dehumidification effect and energy utilization efficiency.

[0044] Those skilled in the art will understand that this solution does not specifically limit the first preset temperature and the second preset temperature. In actual operation, users can set the values ​​of the first preset temperature and the second preset temperature according to specific needs. For example, in a specific implementation, the first preset temperature is set to 15℃, and the second preset temperature is set to 0℃.

[0045] like Figure 1 and Figure 4 As shown, in a specific embodiment, the material conveying unit 102 includes at least a material feeder 1021, an air supply pipe, a cyclone separator (not shown in the figure), and a shut-off fan 1022; the material feeder 1021 is connected to the outlet of the ring die pellet mill 1011 through a buffer pipe 1024, and the shut-off fan 1022 is connected to the inlet of the ring die pellet mill 1011.

[0046] In this design, the material conveying unit 102 includes a material conveyor 1021, a cyclone separator, and a shut-off fan 1022 arranged sequentially, all connected by an air supply duct. Specifically, the material conveyor 1021 is connected to the outlet of the ring die pellet mill 1011 in the pelletizing unit 101 via a buffer pipe 1024, while the shut-off fan 1022 is connected to the inlet of the ring die pellet mill 1011. During operation, abnormal material in the pelletizing unit 101 enters the material conveyor 1021 through the buffer pipe 1024. The negative pressure generated in the air supply duct transports the material from the material conveyor 1021 to the cyclone separator, then through the shut-off fan 1022, and finally back to the ring die pellet mill 1011 for pelletizing. During this process, the hot air unit 103 dehumidifies the abnormal material in the material conveying unit to prevent it from adhering to the walls or becoming moldy.

[0047] In one specific implementation, the hot air unit 103 includes a main connecting pipe 1033 and a plurality of connecting branch pipes 1034 connected to the main connecting pipe 1033, and each of the connecting branch pipes 1034 is provided with a valve for opening or closing the main connecting pipe 1033 and the connecting branch pipes 1034; the main connecting pipe 1033 is connected to the heat exchanger 1032, and the plurality of connecting branch pipes are respectively connected to the feeders 1021 on the plurality of feeding and conveying units 102.

[0048] In the feed production system 100 of this scheme, only one hot air unit 103 is provided, but this hot air unit 103 can simultaneously dehumidify the materials in one or more feeding and conveying units 102 according to usage requirements. Specifically, the hot air unit 103 includes a main connecting pipe 1033 and several connecting branch pipes 1034 connected to the main connecting pipe 1033. Each connecting branch pipe 1034 is equipped with a valve to control the opening or closing of the connection between the main connecting pipe 1033 and the connecting branch pipe 1034. The main connecting pipe 1033 is connected to the heat exchanger 1032, while each connecting branch pipe 1034 is connected to the feeder 1021 on the feeding and conveying unit 102. The number of connecting branch pipes 1034 is the same as the number of feeding and conveying units 102, ensuring that each feeding and conveying unit 102 can independently receive a hot air supply.

[0049] like Figure 1 and Figure 5 As shown, in a specific embodiment, the feed production system 100 further includes an induced draft fan 107 that provides power to the feeding and conveying unit 102, the air volume of the induced draft fan 107 being greater than the air volume of the blower 1031; and both the connecting branch pipe 1034 and the buffer pipe 1024 are provided with air supply ports 1025.

[0050] In this design, the feed production system 100 also includes an induced draft fan 107 that powers the material conveying unit 102. The air volume of the induced draft fan 107 is greater than that of the blower 1031 in the hot air unit 103, ensuring that the feeder 1021 is under negative pressure and preventing dust from escaping the system. Additionally, this design includes make-up air inlets 1025 on the connecting branch pipe 1034 and the buffer pipe 1024 to balance the pressure within the system and ensure the stability and efficiency of material conveying.

[0051] like Figure 1 As shown, in a specific embodiment, a plurality of pulse tubes 1023 are connected to the air supply pipe between the feeder 1021 and the cyclone separator.

[0052] In this design, multiple spaced pulse tubes 1023 are connected to the air supply pipe between the feeder 1021 and the cyclone separator in the material conveying unit 102. The diameter of the pulse tubes 1023 is larger than that of the air supply pipe; that is, the pulse tubes 1023 are thicker than the air supply pipe. During operation, the abnormal material is mixed with air and accelerated by the feeder 1021. During acceleration, moisture in the abnormal material is transferred into the air, causing a decrease in the moisture content and temperature of the abnormal material. When the abnormal material passes through the pulse tubes 1023, the air velocity decreases due to the increased diameter of the pulse tubes, and the material speed also decreases accordingly. After passing through the pulse tubes 1023, the abnormal material is accelerated again. Subsequently, the abnormal material is conveyed to the cyclone separator through the air supply pipe, where it is separated from the air. The separated material is discharged from the air supply pipe by the airlock and introduced into the hopper 1014 through a pneumatic tee, finally re-entering the ring die pellet mill through the feed inlet for pelleting.

[0053] Those skilled in the art will understand that, according to drying theory, the moisture transfer efficiency of materials is highest during the acceleration process. Therefore, this solution increases the contact time and contact area between the abnormal material and air by setting the pulse tube 1023, thereby improving the drying efficiency.

[0054] like Figure 1 and Figure 2 As shown, in one specific embodiment, the feed production system 100 further includes a ring die flushing unit 104 for automatically flushing the ring dies on the ring die pellet mill 1011; the ring die flushing unit 104 includes a buffer hopper and a screw conveyor 1041, wherein the screw conveyor 1041 is used to transport oil stored in the buffer hopper to the ring die pellet mill 1011 to flush the ring dies.

[0055] In this scheme, the feed production system 100 also includes multiple ring die flushing units 104 for automatically flushing the ring dies on the ring die pellet mill 1011. The main function of this unit is to flush the ring die pellet mill 1011 with a specific oil to keep the ring die pellet mill 1011 clean and operate efficiently, thereby extending its service life and ensuring the quality of feed production.

[0056] Specifically, the ring die rinsing unit 104 includes a buffer hopper (not shown in the figure) and a screw conveyor 1041. The buffer hopper stores the oil required for rinsing the ring die, while the screw conveyor 1041 is responsible for quantitatively and evenly pushing the oil from the buffer hopper to the ring die pellet mill 1011, thereby achieving effective rinsing of the ring die. In this solution, the screw conveyor 1041 adopts variable frequency speed control technology, allowing users to set the feeding speed, single feeding time, and total feeding time according to actual needs, ensuring precise control and efficient operation of the rinsing process. Furthermore, a level sensor is installed in the buffer hopper to display the amount of oil in real time. When the oil is insufficient, the level sensor will automatically remind the user to replenish the oil in time, thereby ensuring the normal operation of the ring die rinsing unit 104 and avoiding rinsing interruptions due to oil shortage.

[0057] It is worth noting that the number of ring die rinsing units 104 in this scheme is the same as the number of ring die pellet mills 1011 in the pelletizing unit 101, and the two are set up in a one-to-one correspondence.

[0058] In one specific embodiment, the ring die flushing unit 104 also includes a material shut-off gate (not shown in the figure). Those skilled in the art will understand that the ring die flushing operation is performed after each pelleting cycle, and the ring die flushing unit 104 is not operational during pelleting. However, during pelleting, steam is generated in the system to heat the material. To prevent steam from entering the screw conveyor 1041 from the ring die pellet mill and causing the oil to become wet, a material shut-off gate is provided. By providing the material shut-off gate, this solution ensures good sealing between the screw conveyor 1041 and the pellet mill housing during pelleting, effectively preventing steam from contacting the oil, thereby ensuring the smooth operation of the automatic ring die flushing process.

[0059] In one specific implementation, the oil from the ring die flushing unit 104 is flushed out of the ring die pellet mill 1011 and then enters the material conveying unit 102 through the buffer pipe 1024 for recycling.

[0060] In this scheme, when the ring die rinsing unit 104 is working, oil is conveyed to the ring die pellet mill 1011 to rinse away residues on the surface of the ring die. After rinsing, the oil is discharged from the ring die pellet mill 1011, enters the feeder 1021 of the feeding and conveying unit 102 through the buffer pipe 1024, and then flows back to the ring die rinsing unit 104 to perform automatic ring die rinsing operation. Those skilled in the art will understand that when the oil enters the feeding and conveying unit 102, its movement process is the same as that of abnormal materials. Since the above scheme describes the movement process of abnormal materials in detail, it will not be repeated here.

[0061] like Figure 1 and Figure 5 As shown, in a specific embodiment, the feed production system 100 further includes a negative pressure cleaning unit 105 and an exhaust gas dust removal unit 106 connected in sequence. The dust suction head in the negative pressure cleaning unit 105 is located at the position of the ring die pellet mill 1011, and is used to adsorb the dust generated during the pelleting process of the ring die pellet mill 1011 into the exhaust gas dust removal unit 106. The negative pressure cleaning unit 105 includes at least one main dust removal pipe 1051 and multiple dust removal branch pipes 1052 connected to the main dust removal pipe 1051. Each dust removal branch pipe 1052 is provided with a valve for opening or closing the connection between the main dust removal pipe 1051 and the dust removal branch pipe 1052. The main dust removal pipe 1051 is connected to the exhaust gas dust removal unit 106, and the dust removal branch pipes 1052 are connected to the dust suction head. The exhaust gas dust removal unit 106 includes a pulse bag filter 1061 and a collection device connected thereto. The pulse bag filter 1061 is used to purify dust, and the collection device is used to collect the separated dust.

[0062] In this scheme, the feed production system 100 also includes a negative pressure cleaning unit 105 and an exhaust gas dust removal unit 106 connected in sequence. The negative pressure cleaning unit 105 is used to adsorb the dust generated by the pelleting unit 101 during the pelleting process and collect it into the exhaust gas dust removal unit 106. The exhaust gas dust removal unit 106 is used to purify the dust collected by the negative pressure cleaning unit 105 to ensure that the exhaust gas meets emission standards, and at the same time collects the separated dust to prevent secondary pollution. The negative pressure cleaning unit 105 and the exhaust gas dust removal unit 106 are described in detail below:

[0063] The negative pressure cleaning unit 105 includes a main dust collection pipe 1051 and several branch dust collection pipes 1052 connected to the main dust collection pipe 1051. Each branch dust collection pipe 1052 is equipped with a valve to control the flow direction of dust, enabling independent control of different granulation units 101. In this design, the negative pressure cleaning unit 105 also includes a suction head, which is detachably connected to the branch dust collection pipes 1052 as needed. When performing a cleaning operation, the air network is activated, the "cleaning function" is selected, and the manual valve is opened to initiate negative pressure cleaning. After cleaning is completed, the manual valve and air network are closed.

[0064] It is worth noting that this solution does not limit the number of dust collection main pipes 1051 and dust collection branch pipes 1052. In one specific implementation, two dust collection main pipes 1051 can be set, and each dust collection main pipe 1051 is connected to several dust collection branch pipes 1052. Specifically, one dust collection main pipe 1051 and the multiple dust collection branch pipes 1052 connected to it are located at the hopper 1014 to perform dust collection operations around the hopper 1014. The other dust collection main pipe 1051 and the multiple dust collection branch pipes 1052 connected to it are located at the ring die pellet mill 1011. In other implementations, the multiple dust collection branch pipes 1052 connected to one dust collection main pipe 1051 can be located in different areas. For example, a dust removal branch pipe 1052 is installed in the modulator area of ​​the system (the connection area between the hopper 1014 and the ring die pellet mill 1011) to perform dust removal operation, and a dust removal straight pipe is installed in the pellet mill to perform dust removal operation.

[0065] The exhaust gas dust removal unit 106 includes a pulse jet bag filter 1061 and a collection device (not shown in the figure). The pulse jet bag filter 1061 is responsible for purifying the exhaust gas, and the purified exhaust gas is discharged. The collection device is used to collect the dust separated by the pulse jet bag filter 1061. Specifically, the pulse jet bag filter 1061 includes at least a dust hopper, an upper chamber, a middle chamber, and a lower chamber, wherein the upper chamber, middle chamber, and lower chamber are compartmentalized. During operation, the dust-laden gas enters the dust hopper through a pipe. Coarse dust particles fall directly to the bottom of the dust hopper, while fine dust particles are carried upward by the airflow into the middle and lower chambers. Dust accumulates on the outer surface of the filter bags. The filtered gas enters the upper chamber, passes through the clean gas collection pipe and the exhaust duct, and is then discharged to the atmosphere by the exhaust fan.

[0066] The cleaning process of the pulse jet bag filter 1061 employs a compartment-based, air-stop cleaning method. Specifically, firstly, the clean air outlet duct of the compartment is shut off, leaving the filter bags in a state of no airflow. This step ensures that dust on the filter bags will not re-adhere due to airflow disturbance during the cleaning process. Next, once the filter bags are in a no-airflow state, the pulse valve is opened, and compressed air is used for pulse jet cleaning. The high-pressure airflow generated by the pulse jet effectively removes dust from the filter bags.

[0067] It is worth noting that the shut-off valve in this solution needs to close for a preset duration to ensure that the dust detached from the filter bag has sufficient time to settle into the ash hopper. Furthermore, this solution also prevents dust from re-attaching to adjacent filter bag surfaces after detaching from the filter bag surface, ensuring thorough filter bag cleaning.

[0068] In addition, the pulse dust collector in this solution is equipped with an automatic differential pressure gauge. When the differential pressure on the automatic differential pressure gauge exceeds the operating range, it will remind you to replace the 1061 filter bag of the pulse bag dust collector.

[0069] Through the coordinated operation of the negative pressure cleaning unit 105 and the exhaust gas dust removal unit 106, the feed production system 100 can effectively control dust pollution, improve the quality of the production environment, and ensure the environmental protection and sustainability of the production process.

[0070] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A feed production system, characterized in that, include: Multiple pelletizing units connected in parallel, each pelletizing unit including at least a ring die pellet mill, a heat preservation device and a cooling device connected in sequence; Multiple feeding and conveying units, corresponding to the pelletizing unit, are used to receive abnormal material discharged from the ring die pellet mill. The abnormal material, after processing, is then re-conveyed back to the ring die pellet mill for pelletizing. A hot air unit is connected to the material conveying unit via an air duct; the hot air unit includes a blower and a heat exchanger, and is used to dehumidify abnormal materials in the material conveying unit.

2. The feed production system according to claim 1, characterized in that, The material conveying unit includes at least a material conveyor, an air supply pipe, a cyclone separator, and a shut-off fan; The feeder is connected to the discharge port of the ring die pellet mill via a buffer tube, and the airlock is connected to the feed port of the ring die pellet mill.

3. The feed production system according to claim 2, characterized in that, The hot air unit includes a main connecting pipe and multiple branch connecting pipes connected to the main connecting pipe, and each branch connecting pipe is equipped with a valve for opening or closing the main connecting pipe and the branch connecting pipe. The main connecting pipe is connected to the heat exchanger, and the multiple connecting branch pipes are respectively connected to the feeders on multiple feeding and conveying units.

4. The feed production system according to claim 3, characterized in that, The feed production system also includes an induced draft fan that provides power to the feeding and conveying unit, wherein the air volume of the induced draft fan is greater than that of the blower. Both the connecting branch pipe and the buffer pipe are equipped with air inlets.

5. The feed production system according to any one of claims 2-4, characterized in that, Multiple pulse tubes are connected to the air supply pipe between the feeder and the cyclone separator.

6. The feed production system according to any one of claims 1-4, characterized in that, The feed production system also includes a ring die flushing unit for automatically flushing the ring dies on the ring die pellet mill; The ring die rinsing unit includes a buffer hopper and a screw conveyor, wherein the screw conveyor is used to transport the oil stored in the buffer hopper to the ring die pellet mill to rinse the ring die.

7. The feed production system according to claim 6, characterized in that, The oil from the ring die flushing unit is flushed out of the ring die pellet mill and then enters the material conveying unit through the buffer pipe for recycling.

8. The feed production system according to claim 6, characterized in that, The feed production system also includes a negative pressure cleaning unit and an exhaust gas dust removal unit connected in sequence. The dust suction head in the negative pressure cleaning unit is located at the position of the ring die pellet mill, and is used to adsorb the dust generated during the pelleting process of the ring die pellet mill into the exhaust gas dust removal unit.

9. The feed production system according to claim 8, characterized in that, The negative pressure cleaning unit includes at least one main dust removal pipe and multiple branch dust removal pipes connected to the main dust removal pipe. Each branch dust removal pipe is equipped with a valve for opening or closing the main dust removal pipe and the branch dust removal pipe. The main dust removal pipe is connected to the exhaust gas dust removal unit, and the branch dust removal pipe is connected to the dust suction head.

10. The feed production system according to claim 9, characterized in that, The exhaust gas dust removal unit includes a pulse bag filter and a collection device connected thereto. The pulse bag filter is used to purify the dust, and the collection device is used to collect the separated dust.

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