A drying system that uses incinerator exhaust gas to preheat the air intake of the drying equipment.

Abstract

This application relates to the field of drying equipment technology, and discloses a drying system that uses incinerator exhaust gas to preheat the inlet air of a drying device. The drying system includes: an incinerator with an exhaust gas outlet; a heat exchanger including an exhaust gas conveying chamber and a gas conveying chamber, the exhaust gas conveying chamber having a first inlet and a first outlet, the first inlet being connected to the exhaust gas outlet; the gas conveying chamber having a second inlet and a second outlet, the second inlet being used to input air; the heat exchanger being used to exchange heat between the exhaust gas and air; a heater having a first inlet and a first outlet, the first inlet being connected to the second outlet of the heat exchanger; the heater being used to reheat the air; and a drying tower having a first inlet connected to its inner cavity; the first inlet of the drying tower is connected to the first outlet of the heater, for drying the material in the inner cavity of the drying tower using air. This drying system can effectively utilize the energy within the system, improving resource utilization.

Description

Technical Field

[0001] This application relates to the field of drying equipment technology, and in particular to a drying system that uses incinerator exhaust gas to preheat the air intake of the drying equipment. Background Technology

[0002] The current method of preheating the intake air in spray drying utilizes the waste heat from the exhaust of the spray dryer itself. However, the exhaust temperature of spray drying is not high, only about 90°C. This results in the effect of using exhaust to preheat the intake air not being very good. The temperature of the preheated intake air is less than 40°C, and the amount of heat that can be recovered is limited, making it impossible to achieve efficient energy saving and consumption reduction. Utility Model Content

[0003] This application discloses a drying system that uses incinerator exhaust gas to preheat the air intake of a drying device. This drying system can effectively utilize the internal energy of the system, improve resource utilization, and save energy and reduce consumption.

[0004] To achieve the above objectives, this application provides the following technical solution: This application provides a drying system that uses incinerator exhaust gas to preheat the inlet air of a drying device, comprising: An incinerator, wherein the incinerator has an exhaust gas outlet; A heat exchanger includes an independent exhaust gas delivery chamber and a gas delivery chamber. The exhaust gas delivery chamber has a first inlet and a first outlet. The first inlet of the heat exchanger is connected to the exhaust gas outlet, and the first outlet of the heat exchanger is used to discharge the exhaust gas to the outside of the heat exchanger. The gas delivery chamber has a second inlet and a second outlet. The second inlet of the heat exchanger is used to input air, and the second outlet of the heat exchanger is used to output air. The heat exchanger is configured to exchange heat between the exhaust gas located in the exhaust gas delivery chamber and the air located in the gas delivery chamber, thereby heating the air. A heater having a first air inlet and a first air outlet, the first air inlet of the heater being connected to a second air outlet of the heat exchanger; the heater is used to reheat the air. A drying tower having a first air inlet connected to an inner cavity; the first air inlet of the drying tower is connected to a first exhaust port of the heater, for drying the material in the inner cavity of the drying tower by means of the air.

[0005] In some embodiments, the drying tower further includes a feed inlet and a discharge outlet, the feed inlet being located at the top of the drying tower and the discharge outlet being located at the bottom of the drying tower for discharging dried material and air; along the direction from the top to the bottom of the drying tower, the first air inlet of the drying tower is located on the side of the feed inlet facing the discharge outlet and is located on the side wall of the drying tower.

[0006] In some embodiments, the drying system further includes an air inlet assembly, which includes an air inlet duct, a filter, and a blower. One end of the air inlet duct is connected to the filter, and the other end is connected to the second air inlet of the heat exchanger. The blower is installed inside the air inlet duct.

[0007] In some embodiments, the drying system further includes a receiving tower and a waste heat recovery unit, wherein: The receiving tower has a feed inlet, a discharge outlet, and an exhaust outlet. The feed inlet of the receiving tower is connected to the discharge outlet of the drying tower. The discharge outlet of the receiving tower is used to output the material, and the exhaust outlet of the receiving tower is used to discharge air. The waste heat recovery unit includes a first gas delivery chamber and a second gas delivery chamber that are independent of each other. The first gas delivery chamber has a first air inlet and a first exhaust outlet. The first air inlet of the waste heat recovery unit is connected to the exhaust outlet of the receiving tower, and the first exhaust outlet of the waste heat recovery unit is used to discharge air to the outside of the waste heat recovery unit. The second gas delivery chamber has a second air inlet and a second exhaust outlet. The second air inlet of the waste heat recovery unit is connected to the air inlet assembly, and the second exhaust outlet of the waste heat recovery unit is connected to the second air inlet of the heat exchanger. The waste heat recovery unit is configured to exchange heat between the air located in the first gas delivery chamber and the air located in the second gas delivery chamber, thereby initially heating the air.

[0008] In some embodiments, the heat exchanger includes a housing, a second air inlet of the heat exchanger is located at the bottom of the housing, and a second air outlet of the heat exchanger is located at the top of the housing; a first air inlet of the heat exchanger is located on the side wall of the housing near the top, and a first air outlet of the heat exchanger is located on the side wall of the housing near the bottom.

[0009] In some embodiments, the heat exchanger further includes multiple partition plates, which are arranged sequentially at intervals along the top to bottom direction of the housing; along the top to bottom direction of the housing, in every two adjacent partition plates, one partition plate is fixed to at least one inner wall of the housing and spaced apart from the opposite inner wall, and the other partition plate is fixed to at least the opposite inner wall of the housing and spaced apart from one inner wall of the housing; and along the top to bottom direction of the housing, in every two adjacent partition plates, the orthographic projection of one partition plate on the bottom of the housing and the orthographic projection of the other partition plate on the bottom of the housing have an overlapping area.

[0010] In some embodiments, the heat exchanger further includes a plurality of delivery pipes, which are spaced apart; each delivery pipe passes through the partition, and one end of each delivery pipe is connected to the second air inlet of the heat exchanger, and the other end is connected to the second exhaust port of the heat exchanger.

[0011] In some embodiments, the heat exchanger is a tubular heat exchanger; the second air inlet of the heat exchanger is located at one end of the heat exchanger in the length direction, and the second exhaust port of the heat exchanger is located at the other end of the heat exchanger in the length direction.

[0012] In some embodiments, the housing includes a main body section and port sections located on both sides of the main body section, the second air inlet and the second exhaust port of the heat exchanger are located in the port sections, the main body section includes a first part and a second part, the first part has an opening on the side, and the second part can selectively block the opening.

[0013] In some embodiments, the drying system further includes a kiln having an exhaust port; the incinerator also has an air inlet connected to the exhaust port of the kiln.

[0014] One embodiment of this application described above has at least the following advantages or beneficial effects: It should be noted that the drying system provided in this application increases the initial temperature of the air before it enters the heater by using the exhaust gas from the incinerator. This structural design can, on the one hand, reduce the energy consumption generated by the heater during the heating process and improve the air intake heating efficiency in the drying tower; on the other hand, it can reduce the exhaust temperature of the incinerator, which facilitates subsequent treatment of the exhaust gas from the incinerator and enhances the heat recovery and utilization of the exhaust gas from the incinerator.

[0015] Accordingly, the drying system provided in this application, which uses incinerator exhaust gas to preheat the air intake of the drying equipment, can effectively utilize the internal energy of the system, improve resource utilization, and save energy and reduce consumption. Attached Figure Description

[0016] Figure 1 A schematic diagram of a drying system that uses incinerator exhaust gas to preheat the air intake of the drying equipment, provided in an embodiment of this application; Figure 2 for Figure 1 Schematic diagram of the structure of the heat exchanger; Figure 3 for Figure 2 Cross-sectional view of the heat exchanger. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can represent: A alone, A and B at the same time, and B alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0018] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0019] This application provides a drying system that uses the exhaust gas from an incinerator 1 to preheat the air intake of a drying device. Figure 1 This is a schematic diagram of a drying system that uses the exhaust gas from an incinerator 1 to preheat the inlet air of a drying device, as provided in an embodiment of this application. Figure 1As shown, the drying system includes: an incinerator 1, a heat exchanger 2, a heater 3, and a drying tower 4. The incinerator 1 has a tail gas discharge port 101b. The heat exchanger 2 includes an independent tail gas conveying chamber and a gas conveying chamber. The tail gas conveying chamber has a first inlet 201a and a first outlet 201b. The first inlet 201a of the heat exchanger 2 is connected to the tail gas discharge port 101b, and the first outlet 201b of the heat exchanger 2 is used to discharge tail gas to the outside of the heat exchanger 2. The gas conveying chamber has a second inlet 202a and a second outlet 202b. The second inlet 202a of the heat exchanger 2 is used to input air. The second exhaust port 202b is used to output air; the heat exchanger 2 is configured to exchange heat between the exhaust gas in the exhaust gas delivery chamber and the air in the gas delivery chamber to heat the air; the heater 3 has a first air inlet 301a and a first exhaust port 301b, the first air inlet 301a of the heater 3 is connected to the second exhaust port 202b of the heat exchanger 2; the heater 3 is used to reheat the air; the drying tower 4 has a first air inlet 401a connected to the inner cavity; the first air inlet 401a of the drying tower 4 is connected to the first exhaust port 301b of the heater 3 for drying the material in the inner cavity of the drying tower 4 by means of air.

[0020] It should be understood that the exhaust gas delivery chamber and the gas delivery chamber in heat exchanger 2 are independent of each other. During the heat exchange process between the exhaust gas and the air, there is no risk of mixing between the two, so as to ensure the safety of the air input into the drying tower 4 for the drying operation of the material.

[0021] When using the drying system provided in this application embodiment, the high-temperature exhaust gas in the incinerator 1 enters the first inlet 201a of the heat exchanger 2 connected thereto through the exhaust gas outlet 101b, and is then introduced into the exhaust gas conveying chamber through the first inlet 201a of the heat exchanger 2, thereby raising the temperature of the heat exchanger 2. It should be understood that the exhaust gas flowing through the exhaust gas conveying chamber can eventually be discharged through the first exhaust outlet 201b of the heat exchanger 2. Air can enter the gas conveying chamber through the second inlet 202a of the heat exchanger 2 to exchange heat with the exhaust gas located in the exhaust gas conveying chamber. Specifically, the heat of the exhaust gas can be transferred to the air to heat the air. The heated air can be delivered through the second exhaust port 202b of the heat exchanger 2 to the first air inlet 301a of the heater 3 connected thereto and enter the interior of the heater 3; the heater 3 reheats the air; then, the air reheated by the heater 3 can be delivered through the first exhaust port 301b of the heater 3 to the first air inlet 401a of the heating tower connected to the heater 3 to dry the material in the inner cavity of the drying tower 4.

[0022] It should be noted that the drying system provided in this application embodiment increases the initial temperature of the air before it enters the heater 3 by using the exhaust gas from the incinerator 1. This structural configuration can, on the one hand, reduce the energy consumption generated by the heater 3 during the heating process and improve the air intake heating efficiency in the drying tower 4; on the other hand, it can reduce the exhaust temperature of the incinerator 1, which facilitates subsequent treatment of the exhaust gas from the incinerator 1 and enhances the heat recovery and utilization of the exhaust gas from the incinerator 1.

[0023] Accordingly, the drying system provided in this application, which uses the exhaust gas from the incinerator 1 to preheat the air intake of the drying equipment, can effectively utilize the internal energy of the system, improve resource utilization, and save energy and reduce consumption.

[0024] It is worth noting that the drying system provided in this application embodiment is applicable to situations where an incinerator 1 and drying equipment coexist on the same production line or in the same workshop, so as to combine the heat-generating and heat-consuming equipment on the production line into a system that reduces energy consumption. For example, the drying equipment can be a spray drying equipment.

[0025] Please continue to refer to this. Figure 1 The structure shown, exemplarily, includes a heater 3 that also has a second air inlet 302a for inputting natural gas for the heater 3 to burn and heat the air.

[0026] In some embodiments, please refer to Figure 1 As shown in the diagram, the drying tower 4 also includes a feed inlet 402a and a discharge outlet 402b. The feed inlet 402a is located at the top of the drying tower 4, and the discharge outlet 402b is located at the bottom of the drying tower 4, used to discharge the dried material and air. Along the top to bottom direction of the drying tower 4, the first air inlet 401a is located on the side of the drying tower 4 facing the discharge outlet 402b and is located on the side wall of the drying tower 4. It should be understood that the side of the drying tower 4 closer to the ground is the bottom, and the opposite side is the top. Of course, the bottoms of other structural components in this drying system are also close to the ground, which will not be described in detail here.

[0027] It should be noted that, in this embodiment, the feed inlet 402a is located at the top of the drying tower 4, allowing the material to be dried to fall naturally and disperse. The first air inlet 401a is located on the side wall of the drying tower 4 from the top to the bottom, facing the feed inlet 402a towards the discharge outlet 402b. This design allows the heated air to enter the drying tower 4 from the side and form a full and uniform contact with the falling material, effectively avoiding uneven drying in certain areas and accelerating the drying rate.

[0028] In addition, the discharge port 402b located at the bottom of the drying tower 4 can discharge the dried solid material and the air that participated in the drying process. The solid material naturally settles to the bottom due to gravity, which is convenient for efficient collection. The air is discharged into the drying tower 4 along with the material, so as to reduce maintenance costs and ensure the stability of the drying tower 4.

[0029] It is worth noting that, since there is heat exchange between the air and the material inside the drying tower 4 during the drying process, the temperature of the air that has participated in the drying process and is output from the outlet 402b of the drying tower 4 will be lower than the temperature of the air input from the first inlet 401a of the drying tower 4.

[0030] In some embodiments, such as Figure 1 As shown, the drying system provided in this application embodiment also includes an air inlet assembly 5, which includes an air inlet pipe 51, a filter 52 and a blower 53. One end of the air inlet pipe 51 is connected to the filter 52, and the other end is connected to the second air inlet 202a of the heat exchanger 2. The blower 53 is installed inside the air inlet pipe 51.

[0031] The filter 52 can be configured as needed, for example, it can be a primary filter 52 and / or a secondary filter 52, to filter impurities in the air, improve the stability of the air during operation within the system, and avoid negative effects on the materials other than drying. The blower 53 is used to drive air from the filter 52 side to the heat exchanger 2 side to enhance the airflow rate and improve the overall system performance.

[0032] In some embodiments, such as Figure 1 As shown, the drying system provided in this embodiment of the application also includes a receiving tower 6, wherein: the receiving tower 6 has a feed inlet 601a, a discharge outlet 601b and an exhaust outlet 602b, the feed inlet 601a of the receiving tower 6 is connected to the discharge outlet 402b of the drying tower 4, the discharge outlet 601b of the receiving tower 6 is used for outputting materials, and the exhaust outlet 602b of the receiving tower 6 is used for discharging air.

[0033] Specifically, the inlet 601b of the receiving tower 6 connects to the outlet 402b of the drying tower 4, ensuring that the dried material and air enter the receiving tower 6, preventing material from scattering and being wasted during transfer, and ensuring the continuity of the production process. The outlet 601b at the bottom of the receiving tower 6 is used to output the final solid material, allowing the dried material to be collected quickly, improving the efficiency of subsequent processing or storage. The independent exhaust port 602b can separate and discharge the air entrained in the material in a timely manner, preventing air retention from affecting the purity of material collection and reducing air interference in the receiving process, further optimizing the stability and reliability of the overall material handling.

[0034] The discharge port 601b of the receiving tower 6 may be equipped with a valve, such as a star valve, so that the operator can selectively open the discharge port 601b. The specific details will not be elaborated further.

[0035] To better understand the drying system provided in this application embodiment that uses the exhaust gas from the incinerator 1 to preheat the air intake of the drying equipment, a specific operating procedure is provided below.

[0036] Step 1: The exhaust gas from incinerator 1 is discharged at high temperature by a blower and sent to the heat exchanger 2 to raise the temperature of the heat exchanger 2; the heater 3 is heated to the required temperature for the process. Step 2: After passing through the primary and secondary filters 52 and the waste heat recovery unit, the air is sent to the heat exchanger 2 by the blower 53 (such as a blower) for heat exchange. Step 3: The air preheated by heat exchanger 2 enters heater 3 for final heating. After reaching the specified process temperature, it enters drying tower 4, which is expected to reduce the energy consumption of heater 3 by about 15%.

[0037] In some embodiments, such as Figure 1 As shown, the drying system provided in this embodiment of the application also includes a waste heat recovery unit 7. This waste heat recovery unit 7 is used to recover and utilize the heat of the air inside the receiving tower 6. The waste heat recovery unit 7 includes a first gas conveying chamber and a second gas conveying chamber that are independent of each other. The first gas conveying chamber has a first air inlet 701a and a first exhaust port 701b. The first air inlet 701a of the waste heat recovery unit 7 is connected to the exhaust port 602b of the receiving tower 6, and the first exhaust port 701b of the waste heat recovery unit 7 is used to discharge air to the outside of the waste heat recovery unit 7. The second gas conveying chamber has a second air inlet 702a and a second exhaust port 702b. The second air inlet 702a of the waste heat recovery unit 7 is connected to the air inlet assembly 5, and the second exhaust port 702b of the waste heat recovery unit 7 is connected to the second air inlet 202a of the heat exchanger 2. The waste heat recovery unit 7 is configured to exchange heat between the air located in the first gas conveying chamber and the air located in the second gas conveying chamber, thus initially heating the air.

[0038] Before entering the second air inlet 202a of the heat exchanger 2, the air first enters the waste heat recovery unit 7. Specifically, during the flow of air from the second air inlet 702a to the second exhaust port 702b of the waste heat recovery unit 7, the air in the first gas conveying chamber (which has a certain temperature from the receiving tower 6) exchanges heat with the air in the second gas conveying chamber to preliminarily heat the air in the second gas conveying chamber, thereby increasing the temperature of the air entering the heat exchanger 2, further improving the energy utilization rate of the entire system, and effectively saving energy.

[0039] It is worth noting that when the drying system provided in this application embodiment uses a waste heat recovery unit 7, the air is heated three times before entering the drying tower 4, that is, it is heated for the first time at the waste heat recovery unit 7, heated for the second time at the heat exchanger 2, and heated for the third time at the heater 3.

[0040] Of course, since the first gas conveying chamber and the second gas conveying chamber in the waste heat recovery unit 7 are independent of each other, there is no risk of mixing between the two during the heat exchange process between the air and the air, so as to ensure the safety of the air input into the drying tower 4 for the drying operation of the material.

[0041] Figure 2 for Figure 1 A schematic diagram of the structure of heat exchanger 2. Please refer to... Figure 1 refer to Figure 2 In some embodiments of the structure shown, the heat exchanger 2 includes a housing 21, a second air inlet 202a of the heat exchanger 2 located at the bottom of the housing 21, and a second exhaust port 202b of the heat exchanger 2 located at the top of the housing 21; a first air inlet 201a of the heat exchanger 2 is located on the side wall of the housing 21 near the top, and a first exhaust port 201b of the heat exchanger 2 is located on the side wall of the housing 21 near the bottom.

[0042] It should be noted that the exhaust gas in heat exchanger 2 is introduced from top to bottom, while the air is introduced from bottom to top. This increases the residence time of the exhaust gas in heat exchanger 2, allowing the high-temperature exhaust gas to flow downwards in the shell 21 and form a counter-current convection with the upward air, maximizing the contact time and contact area between the two and improving the heat transfer efficiency.

[0043] Figure 3 for Figure 2 Cross-sectional view of heat exchanger 2. Please refer to... Figure 2 refer to Figure 3 In some embodiments of the structure shown, the heat exchanger 2 further includes multiple partition plates 22, which are arranged sequentially at intervals along the top to bottom direction of the housing 21. Along the top to bottom direction of the housing 21, in each pair of adjacent partition plates 22, one partition plate 22 is fixed to at least one inner wall of the housing 21 and spaced apart from the opposite inner wall, and the other partition plate 22 is fixed to at least the opposite inner wall of the housing 21 and spaced apart from one inner wall of the housing 21. Furthermore, along the top to bottom direction of the housing 21, in each pair of adjacent partition plates 22, the orthographic projection of one partition plate 22 on the bottom of the housing 21 overlaps with the orthographic projection of the other partition plate 22 on the bottom of the housing 21.

[0044] like Figure 3 As shown, Figure 3The solid line with arrows roughly indicates the direction of exhaust gas flow. As the exhaust gas flows from the first inlet 201a to the first outlet 201b of the heat exchanger 2, it will flow through a curved flow path formed by the adjacent partition plates 22.

[0045] It should be noted that, in this embodiment, the heat exchanger 2, through the specific arrangement of multiple partition plates 22, can extend the flow path and contact time of the exhaust gas inside the shell 21, thereby improving the heat exchange efficiency. Specifically, the multiple partition plates 22 are arranged at intervals along the vertical direction of the shell 21, and adjacent partition plates 22 are respectively fixed to the opposite inner wall of the shell 21 and left open on the other inner wall. This staggered layout forces the exhaust gas to form a "returning" flow inside the shell 21, avoiding direct short-circuiting of the airflow, so as to maximize the extension of the residence time of the exhaust gas inside the shell 21.

[0046] Meanwhile, the overlapping area of ​​the orthographic projection of adjacent partition plates 22 on the bottom of the shell 21 further ensures that the airflow will not pass directly through the gap of the partition plates 22, but must flow through the heat exchange area fully along the path guided by the partition plates 22, effectively reducing heat exchange dead zones. Please continue to combine Figure 2 refer to Figure 3 As shown in some embodiments, the heat exchanger 2 further includes multiple delivery pipes 23, which are spaced apart. Each delivery pipe 23 passes through a partition, and one end of each delivery pipe 23 is connected to the second air inlet 202a of the heat exchanger 2, while the other end is connected to the second exhaust port 202b of the heat exchanger 2. Figure 3 The dashed line with an arrow roughly indicates the direction of air flow.

[0047] It should be noted that, in this embodiment, the heat exchanger 2, through the combined design of multiple conveying pipes 23 and baffles, can further enhance the heat exchange effect, while improving the stability of airflow and the operating efficiency of the equipment. Specifically, the multiple conveying pipes 23 are spaced apart and penetrate the baffles, allowing the air to be heated flowing through the conveying pipes 23 to form a contact structure with the high-temperature exhaust gas inside the shell 21, where heat is exchanged through the pipe walls of the conveying pipes 23. This increases the heat exchange area between the air and the exhaust gas, avoids local heat concentration or waste, and significantly improves the heat exchange rate.

[0048] In some embodiments, the heat exchanger 2 is a tubular heat exchanger 2; the second air inlet 202a of the heat exchanger 2 is located at one end of the heat exchanger 2 in the length direction, and the second exhaust port 202b of the heat exchanger 2 is located at the other end of the heat exchanger 2 in the length direction, so as to increase the residence time of the exhaust gas and air in the heat exchanger 2 and enhance the heat exchange effect.

[0049] In some embodiments, the housing 21 includes a main body segment 211 and port segments 212 located on both sides of the main body segment 211. The second air inlet 202a and the second exhaust port 202b of the heat exchanger 2 are disposed in the port segments 212. The main body segment 211 includes a first portion and a second portion. The first portion has an opening on its side, and the second portion can selectively block the opening. It should be understood that the size of the opening can be set according to requirements, and the length of the opening can even be the same as the length of the main body segment 211, so that the side of the entire housing 21 can be fully opened in a local area.

[0050] It should be noted that, in this embodiment, a side-opening inspection door is adopted, which facilitates cleaning and maintenance, improves maintenance efficiency, and reduces maintenance costs.

[0051] In some embodiments, such as Figure 2 As shown, the heat exchanger 2 also includes locking elements for locking the first part and the second part, with multiple locking elements spaced apart along the top to bottom direction of the heat exchanger 2.

[0052] It should be noted that in the drying system provided in this application embodiment, the heat exchanger 2 uses multiple locking members spaced apart along the top to bottom direction to fix the first part and the second part, which can improve the connection stability and sealing performance of the overall structure, while also taking into account the convenience of equipment maintenance.

[0053] In some embodiments, such as Figure 1 As shown, the drying system also includes a kiln 8 with an exhaust port; the incinerator 1 also has an air inlet 101a, which is connected to the exhaust port of the kiln 8. The incinerator 1 is used to incinerate the exhaust gas from the kiln 8.

[0054] It is worth noting that the temperature of the exhaust gas discharged from incinerator 1 is affected by the internal combustion materials and the set parameters. For example, taking the use of incinerator 1 to treat the exhaust gas from lithium iron phosphate sintering kiln 8 as an example, the temperature of the exhaust gas discharged from incinerator 1 is approximately 200℃ to 300℃. Exhaust gas within this temperature range can exchange heat with air to heat the air, effectively utilizing the heat from the exhaust gas of incinerator 1 and reducing heat waste and energy consumption for heating the intake air.

[0055] In addition, please continue to refer to Figure 1 As shown in the structure, a fan 9 can be installed between the incinerator 1 and the first air inlet 201a of the heat exchanger 2 to accelerate the transfer rate of exhaust gas between the two; a fan 10 can be connected to the first exhaust port 701b of the waste heat recovery unit 7 to accelerate air discharge. Of course, in this embodiment, fans can also be installed in the pipes between other structural components to accelerate airflow, which will not be described in detail here.

[0056] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A drying system that utilizes incinerator exhaust gas to preheat the inlet air of a drying device, characterized in that, include: An incinerator, wherein the incinerator has an exhaust gas outlet; A heat exchanger includes an independent exhaust gas delivery chamber and a gas delivery chamber. The exhaust gas delivery chamber has a first inlet and a first outlet. The first inlet of the heat exchanger is connected to the exhaust gas outlet, and the first outlet of the heat exchanger is used to discharge the exhaust gas to the outside of the heat exchanger. The gas delivery chamber has a second inlet and a second outlet. The second inlet of the heat exchanger is used to input air, and the second outlet of the heat exchanger is used to output air. The heat exchanger is configured to exchange heat between the exhaust gas located in the exhaust gas delivery chamber and the air located in the gas delivery chamber, thereby heating the air. A heater having a first air inlet and a first air outlet, the first air inlet of the heater being connected to a second air outlet of the heat exchanger; the heater is used to reheat the air. A drying tower having a first air inlet connected to an inner cavity; the first air inlet of the drying tower is connected to a first exhaust port of the heater, for drying the material in the inner cavity of the drying tower by means of the air.

2. The drying system according to claim 1, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The drying tower also includes a feed inlet and a discharge outlet. The feed inlet is located at the top of the drying tower, and the discharge outlet is located at the bottom of the drying tower for discharging dried material and air. Along the direction from the top to the bottom of the drying tower, the first air inlet of the drying tower is located on the side of the feed inlet facing the discharge outlet and is located on the side wall of the drying tower.

3. The drying system according to claim 2, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The drying system also includes an air inlet assembly, which includes an air inlet duct, a filter, and a blower. One end of the air inlet duct is connected to the filter, and the other end is connected to the second air inlet of the heat exchanger. The blower is installed inside the air inlet duct.

4. The drying system according to claim 3, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The drying system also includes a receiving tower and a waste heat recovery unit, wherein: The receiving tower has a feed inlet, a discharge outlet, and an exhaust outlet. The feed inlet of the receiving tower is connected to the discharge outlet of the drying tower. The discharge outlet of the receiving tower is used to output the material, and the exhaust outlet of the receiving tower is used to discharge air. The waste heat recovery unit includes a first gas delivery chamber and a second gas delivery chamber that are independent of each other. The first gas delivery chamber has a first air inlet and a first exhaust outlet. The first air inlet of the waste heat recovery unit is connected to the exhaust outlet of the receiving tower, and the first exhaust outlet of the waste heat recovery unit is used to discharge air to the outside of the waste heat recovery unit. The second gas delivery chamber has a second air inlet and a second exhaust outlet. The second air inlet of the waste heat recovery unit is connected to the air inlet assembly, and the second exhaust outlet of the waste heat recovery unit is connected to the second air inlet of the heat exchanger. The waste heat recovery unit is configured to exchange heat between the air located in the first gas delivery chamber and the air located in the second gas delivery chamber, thereby initially heating the air.

5. The drying system according to any one of claims 1-4, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The heat exchanger includes a housing, a second air inlet of the heat exchanger is located at the bottom of the housing, and a second air outlet of the heat exchanger is located at the top of the housing; the first air inlet of the heat exchanger is located on the side wall of the housing near the top, and the first air outlet of the heat exchanger is located on the side wall of the housing near the bottom.

6. The drying system according to claim 5, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The heat exchanger also includes multiple partition plates, which are arranged sequentially at intervals along the top to bottom direction of the shell. Along the top to bottom direction of the shell, in every two adjacent partition plates, one partition plate is fixed to at least one inner wall of the shell and spaced apart from the opposite inner wall, and the other partition plate is fixed to at least the opposite inner wall of the shell and spaced apart from one inner wall of the shell. Furthermore, along the top to bottom direction of the shell, in every two adjacent partition plates, the orthographic projection of one partition plate on the bottom of the shell and the orthographic projection of the other partition plate on the bottom of the shell have an overlapping area.

7. The drying system according to claim 6, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The heat exchanger also includes multiple conveying pipes, which are spaced apart. Each of the multiple conveying pipes passes through the partition plate, and one end of each conveying pipe is connected to the second air inlet of the heat exchanger, and the other end is connected to the second exhaust port of the heat exchanger.

8. The drying system according to claim 7, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The heat exchanger is a tubular heat exchanger; the second air inlet of the heat exchanger is located at one end of the heat exchanger in the length direction, and the second exhaust port of the heat exchanger is located at the other end of the heat exchanger in the length direction.

9. The drying system according to claim 8, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The housing includes a main body section and port sections located on both sides of the main body section. The second air inlet and the second exhaust port of the heat exchanger are located in the port sections. The main body section includes a first part and a second part. The first part has an opening on the side, and the second part can selectively block the opening.

10. The drying system according to any one of claims 1-4, which uses incinerator tail gas to preheat the inlet air of the drying equipment, is characterized in that, The drying system also includes a kiln with an exhaust port; the incinerator also has an air inlet, which is connected to the exhaust port of the kiln.

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