Roller kiln waste heat utilization device and heat exchange system

Abstract

The utility model discloses a roller kiln waste heat utilization device and a heat exchange system, and relates to the field of roller kiln equipment, and the roller kiln waste heat utilization device comprises a main pipeline for providing an air source for equipment to be heated and / or insulated of a roller kiln; the jacket sleeves the outer side wall of the main pipeline, and the inner side wall of the jacket and the outer side wall of the main pipeline form a flowing channel; one end of the high-temperature waste gas pipe is connected with the jacket, the high-temperature waste gas pipe is communicated with the flowing channel, and the high-temperature waste gas pipe is used for conveying high-temperature waste gas into the flowing channel to preheat a gas source in the main pipeline. The jacket is arranged on the outer side wall of the main pipeline to form the flowing channel, and high-temperature waste gas is conveyed into the flowing channel through the high-temperature waste gas pipe to preheat a gas source in front of equipment to be heated and / or insulated and entering the roller kiln, so that the aim of utilizing waste heat of the kiln without modifying the structure of the kiln is fulfilled.

Description

Technical Field

[0001] The utility model relates to the field of roller kiln equipment, in particular to a roller kiln waste heat utilization device and a heat exchange system. Background Art

[0002] The energy consumption cost of the positive electrode material roller kiln is relatively high. When the roller kiln burns the positive electrode material products, a large amount of heat is generated. Part of the heat will be discharged into the atmosphere with the flue gas, resulting in a large amount of heat being wasted and increasing production costs. CN217330756U discloses a kiln air intake preheating system, which contains a heating section and a cooling section kiln, and also includes an air pipe for conveying the gas that has undergone heat exchange with the furnace of the cooling section to the heating section. The middle section of the air pipe is connected to a device for heat exchange with the cooling section, and the tail end of the air pipe is connected to the furnace of the heating section. The residual temperature in the cooling section is still high, and the air pipe passes through the furnace of the cooling section. The furnace temperature is higher than the temperature of the gas in the air pipe. The gas in the air pipe heats up after heat exchange to achieve a preheating effect, and then passes out of the cooling section and conveys gas to the heating section. CN208520219U invention discloses a kiln air intake cooling and heat energy recovery system, which is provided with a heating zone, a heat preservation zone and a cooling zone in sequence from the furnace head. The discharge end of the kiln is a cooling zone, and the cooling zone is a double-layer jacket structure. An air intake main is provided above the cooling zone, and a number of air pipelines are provided between the air intake main and the cooling zone. The air intake pipeline is connected to the double-layer jacket structure of the cooling zone, and the cooling gas is directly ejected toward the inner wall of the jacket. An air outlet is provided in the double-layer jacket in the cooling zone, and the air outlet is connected to the waste heat recovery main. A number of return pipes are led out from the waste heat recovery main to the heating zone and the insulation zone of the kiln. CN214095570U discloses a roller kiln waste heat recovery system, which relates to the technical field of roller kilns. The roller kiln waste heat recovery system comprises: a roller kiln, the roller kiln comprises a heating section, a constant temperature section and a cooling section along the conveying direction; and a process gas supply pipeline, the process gas supply pipeline comprises a preheating pipe section located in the cooling section, and the outlet end of the preheating pipe section supplies gas toward the heating section and / or the constant temperature section. The cooling section may include an interlayer wall spaced apart from the kiln wall of the cooling section, with the preheating pipe section arranged in an interlayer cavity between the kiln wall and the interlayer wall. The preheating pipe section arranged in the interlayer cavity may be a finned tube. However, this existing technology requires significant modification to the existing kiln in the workshop, increasing equipment modification costs.

[0003] In view of this, this application is hereby filed. Utility Model Content

[0004] The purpose of the utility model is to provide a roller kiln waste heat utilization device and a heat exchange system, by arranging a jacket on the outer side wall of the main pipeline to form a flow channel, and transporting high-temperature exhaust gas into the flow channel through the high-temperature exhaust gas pipe to preheat the gas source before entering the roller kiln to be heated and / or insulated equipment, so as to solve the problem in the prior art that the heat utilization device has a great impact on the kiln modification and the modification cost is high.

[0005] The utility model discloses an embodiment provides a roller kiln waste heat utilization device, including:

[0006] The main pipeline provides gas source for the temperature rising and / or heat preservation equipment of roller kiln;

[0007] The jacket is sleeved on the outer side wall of the main pipeline, and the inner side wall thereof forms a flow channel with the outer side wall of the main pipeline;

[0008] The high-temperature waste gas pipe is connected with the jacket at one end and communicates with the flow channel, and the high-temperature waste gas pipe is used for conveying high-temperature waste gas into the flow channel to preheat the gas source in the main pipeline.

[0009] Preferably, the main pipeline is a cylindrical pipe, the jacket is a cylindrical hollow structure, and a gap exists between the inner wall of the jacket and the outer wall of the main pipeline, and the width of the gap is constant.

[0010] Preferably, the jacket comprises oppositely arranged inlet end and outlet end, the inlet end communicates with the high-temperature waste gas pipe, and the outlet end communicates with the workshop through the pipeline system.

[0011] The inlet end is arranged to convey the high-temperature waste gas in the high-temperature waste gas pipe into the flow channel, and the high-temperature waste gas flows along the flow channel and exchanges heat with the gas source in the main pipeline to be cooled before being discharged from the outlet end into the workshop.

[0012] Preferably, the jacket and the high-temperature waste gas pipe are detachably connected through threads.

[0013] Preferably, the high-temperature waste gas pipe is of L-shaped structure and comprises a connecting section and a flow-through section, the connecting section is perpendicularly connected with the flow-through section, and the inner wall of the connecting section is provided with internal threads.

[0014] The first connecting port is provided on the inlet end, the gas flow direction of the first connecting port is consistent with the axial direction of the main pipeline, the first connecting port is provided with external threads, and the connecting section is threadedly connected with the first connecting port.

[0015] Preferably, the second connecting port is provided on the side wall of the inlet end, the gas flow direction of the second connecting port is perpendicular to the axial direction of the main pipeline, the second connecting port is provided with internal threads, the high-temperature waste gas pipe is provided with external threads, and the second connecting port is threadedly connected with the high-temperature waste gas pipe.

[0016] In order to better solve the above problems, a heat exchange system is also provided, comprising the above roller kiln waste heat utilization device and roller kiln, the roller kiln comprising a temperature rising zone and a temperature dropping zone, a first branch pipe is connected to the main pipeline, the first branch pipe communicates with the temperature rising zone, and the first branch pipe is used for conveying the gas source in the main pipeline to the temperature rising zone.

[0017] One end of the high-temperature exhaust pipe is connected with the jacket, and the other end is connected with the exhaust port of the cooling zone.

[0018] Preferably, the roller kiln further comprises a heat preservation zone, and a second branch pipe is further connected with the main pipe, and the second branch pipe is communicated with the heat preservation zone, and the second branch pipe is used for conveying the gas source in the main pipe to the heat preservation zone.

[0019] Preferably, the inlet end of the jacket is arranged at one side of the heat preservation zone, and the outlet end of the jacket is arranged at one side of the heating zone.

[0020] Preferably, the gas source in the main pipe is arranged to flow from one side of the outlet end of the jacket to one side of the inlet end of the jacket.

[0021] Compared with the prior art, the embodiment of the utility model has the following advantages and beneficial effects:

[0022] 1. The roller kiln waste heat utilization device provided by the embodiment of the utility model forms a flow channel by the gap between the inner side wall of the jacket and the outer side wall of the main pipe, so that the high-temperature exhaust gas can be conveyed into the flow channel formed by the jacket and the main pipe by cooperation with the high-temperature exhaust pipe, the gas source in the main pipe is preheated by the high-temperature exhaust gas discharged by the kiln, and thus the energy consumption and cost are reduced. The structure only adds a jacket outside the main pipe to realize heat exchange between the high-temperature exhaust gas and the gas source, the gas source in the main pipe is heated by the high-temperature exhaust gas containing heat, the modification of the equipment is relatively small, and the modification cost of the equipment is reduced.

[0023] 2. The gap width between the inner wall of the jacket and the outer wall of the main pipe is constant in the embodiment of the utility model, so that the high-temperature exhaust gas can flow through the main pipe uniformly, that is, the gas source in the main pipe is uniformly preheated, and the temperature uniformity of the gas source can be improved.

[0024] 3. The high-temperature exhaust gas containing heat after cooling is directly discharged to the outdoor environment in the prior art, but in the embodiment of the utility model, the high-temperature exhaust gas is directly discharged into the workshop after cooling through the flow channel, the air pressure in the workshop is increased, the positive air pressure in the workshop is ensured, the outdoor humid air is prevented from entering the indoor environment, the reaction between the humid air and the surface of the positive electrode material is avoided, and the performance of the positive electrode material is improved. Meanwhile, the dry gas can be reduced into the workshop by the fresh air machine, the use or power of the fresh air machine is reduced, and the energy consumption is reduced. In addition, the gas temperature is higher when entering the furnace by heating the main air inlet pipe, the absorption of the furnace temperature is reduced, the energy consumption is reduced, and the positive electrode material is more uniform when the hot air enters the furnace compared with when the cold air enters the furnace.

[0025] Overall, the roll kiln waste heat utilization device and heat exchange system provided by the embodiment of the present application, by setting the jacket on the outer wall of the main pipeline, forming a flow channel, the high temperature waste gas is transported into the flow channel through the high temperature waste gas pipe to preheat the gas source before entering the roll kiln and / or the temperature maintaining equipment, so as to achieve the purpose of not reforming the kiln structure and realizing the utilization of kiln waste heat. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiment, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation to the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained according to these drawings.

[0027] Figure 1 The roll kiln structure schematic diagram provided by the embodiment of the present application;

[0028] Figure 2 The roll kiln waste heat utilization device structure schematic diagram provided by the embodiment of the present application;

[0029] Figure 3 The jacket and high temperature waste gas pipe connecting structure schematic diagram provided by the embodiment 1 of the present application;

[0030] Figure 4 The jacket and high temperature waste gas pipe connecting structure schematic diagram provided by the embodiment 2 of the present application.

[0031] Markings in the drawings and corresponding component names:

[0032] 1-main pipeline, 2-jacket, 3-high temperature waste gas pipe, 4-inlet end, 5-outlet end, 6-connection section, 7-flow section, 8-first connecting port, 9-second connecting port, 10-warming zone, 11-cooling zone, 12-first branch pipe, 13-exhaust port, 14-temperature maintaining zone, 15-second branch pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the following will combine the drawings in the embodiment of the present application, the technical scheme in the embodiment of the present application is described clearly and completely, obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. The components of the embodiment of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0035] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the application, it should be noted that the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] Embodiments

[0038] Figure 1 For the arrangement structure diagram of the roller kiln in the prior art, the embodiment of the application provides a roller kiln waste heat utilization device, which is used for the roller kiln structure in the Figure 1 , specifically as shown in Figure 2 , comprising: a main pipeline 1, which provides a gas source for a to-be-heated and / or heat-preserving equipment of the roller kiln; a jacket 2, which is sleeved on the outer side wall of the main pipeline 1, and the inner side wall of the jacket 2 and the outer side wall of the main pipeline 1 form a flow channel; a high-temperature waste gas pipe 3, which is connected with the jacket 2 at one end and communicates with the flow channel, and the high-temperature waste gas pipe 3 is used for conveying high-temperature waste gas into the flow channel to preheat the gas source in the main pipeline 1. Through the above structure, the high-temperature waste gas is conveyed into the flow channel formed by the jacket 2 and the main pipeline 1 through the high-temperature waste gas pipe 3, and the gas source in the main pipeline 1 is preheated by using the high-temperature waste gas discharged by the kiln, so as to reduce energy consumption and cost. The structure not only utilizes the high-temperature waste gas discharged by the kiln, reduces energy waste, and reduces production cost, but also reduces direct discharge of waste gas, reduces the influence on the environment, reduces energy consumption through waste heat recovery, reduces operating cost, and improves the economic benefit of enterprises. The key of the embodiment of the application lies in that the waste heat of the roller kiln is effectively utilized without large-scale modification, energy consumption and production cost are reduced, and the influence on the environment is reduced.

[0039] In order to improve the uniformity of preheating, the main pipeline 1 can be provided as a cylindrical pipe, the jacket 2 is a cylindrical hollow structure, there is a gap between the inner wall of the jacket 2 and the outer wall of the main pipeline 1, and the width of the gap is constant, so that the flow rate and flow of high-temperature waste gas outside the main pipeline 1 are more uniform, which facilitates overall control, so as to ensure the heat exchange efficiency and pressure stability. Of course, in other embodiments, the main pipeline 1 and the jacket 2 can also be prismatic structures and the like, which are not limited here, as long as the purpose of not affecting the transportation of the gas source and the uniform flow and heat exchange of the high-temperature waste gas in the flow channel can be achieved.

[0040] Further, the jacket 2 includes an inlet end 4 and an outlet end 5 arranged oppositely, the inlet end 4 is communicated with the high-temperature waste gas pipe 3, and the outlet end 5 is communicated with the workshop through a pipeline system; the inlet end 4 is arranged to transport the high-temperature waste gas in the high-temperature waste gas pipe 3 into the flow channel, and flow along the flow channel and exchange heat with the gas source in the main pipeline 1 to be cooled and then discharged into the workshop from the outlet end 5. Specifically, the inlet end 4 of the jacket 2 is directly connected with the high-temperature waste gas pipe 3, so as to ensure that the high-temperature waste gas can smoothly enter the flow channel, and the outlet end 5 of the jacket 2 is connected with the pipeline system of the workshop to form a channel for discharging the waste gas. The high-temperature waste gas enters the flow channel at the inlet end 4 of the jacket 2, exchanges heat with the gas source in the main pipeline 1 along the inner wall of the jacket 2, preheats the gas source in the main pipeline 1, and at the same time, the waste gas is cooled. The cooled waste gas enters the pipeline system through the outlet end 5 of the jacket 2 and is finally discharged into the workshop. Increasing the air pressure in the workshop ensures the positive air pressure in the workshop, avoids the entry of outdoor humid air into the room, avoids the reaction of humid air with the surface of the positive electrode material, and improves the performance of the positive electrode material. At the same time, the dry gas blown into the workshop by the fresh air machine can be reduced, the use or power of the fresh air machine can be reduced, and the energy consumption can be reduced.

[0041] As a preferred embodiment of the present application, the jacket 2 is detachably connected with the high-temperature waste gas pipe 3 through threads, the connection mode allows the jacket 2 and the high-temperature waste gas pipe 3 to be quickly disassembled and assembled, which is convenient for maintenance and cleaning. Through the threaded connection, good sealing performance can be achieved, the leakage of high-temperature waste gas is prevented, and the safety and environmental protection of the system are improved. For the specific connection structure, two structures of embodiment 1 and embodiment 2 will be described below.

[0042] Embodiment 1: as Figure 3As shown, the high-temperature exhaust gas pipe 3 is an L-shaped structure and includes a connecting section 6 and a flow section 7. The connecting section 6 is vertically connected to the flow section 7, and the inner wall of the connecting section 6 is provided with an internal thread; a first connecting port 8 is provided on the inlet end 4, and the gas flow direction of the first connecting port 8 is consistent with the axial direction of the main pipeline 1. The first connecting port 8 is provided with an external thread, and the connecting section 6 is threadedly connected to the first connecting port 8. Specifically, by setting up an L-shaped high-temperature exhaust gas pipe 3, the direction of the high-temperature exhaust gas flow can be changed to adapt to the preferred direction of high-temperature exhaust gas transportation at the inlet end 4 of the jacket 2. The gas flow direction of the connecting port is consistent with the axial direction of the main pipe 1 to ensure smooth gas flow. In this structure, the flow direction of the high-temperature gas changes vertically at the connection between the connecting section 6 and the flow section 7, and the changed flow direction is consistent with the axial direction of the main pipe 1, which helps to improve the flow uniformity of the high-temperature exhaust gas when entering the flow channel of the jacket 2, avoid the gas flow speed in local areas being too fast or too slow, thereby affecting the heat exchange effect, and at the same time avoid the high-temperature exhaust gas directly impacting the outer wall of the main pipe 1, reducing thermal stress concentration, and thus reducing the risk of damage to the main pipe 1 due to thermal shock.

[0043] Example 2: Figure 4 As described above, the principle is consistent with that of Example 1, except for the connection position and structure. Specifically, a second connection port 9 is provided on the side wall of the inlet end 4. The gas flow direction of the second connection port 9 is perpendicular to the axial direction of the main pipe 1. The second connection port 9 is provided with an internal thread, and the high-temperature exhaust gas pipe 3 is provided with an external thread. The second connection port 9 is threadedly connected to the high-temperature exhaust gas pipe 3. Although Example 2 does not provide an L-shaped high-temperature exhaust gas pipe 3, the second connection port 9 is provided on the side wall of the inlet end 4 so that the gas flow direction of the second connection port 9 is perpendicular to the axial direction of the main pipe 1. That is, the high-temperature exhaust gas will not directly impact the main pipe 1, reducing thermal stress concentration and the risk of damage to the main pipe 1 due to thermal shock. At the same time, it also improves the flow uniformity of the high-temperature exhaust gas when entering the flow channel of the jacket 2. It should be noted that in other embodiments, the structures of Examples 1 and 2 are not limited and are not limited here.

[0044] To better solve the problems mentioned in the background of the embodiments of the present application, the embodiments of the present application also provide a heat exchange system, comprising the roller kiln waste heat utilization device and the roller kiln described above, the roller kiln comprises a heating zone 10 and a cooling zone 11, the main pipeline 1 is connected with a first branch pipe 12, the first branch pipe 12 communicates with the heating zone 10, and the first branch pipe 12 is used for conveying the gas source in the main pipeline 1 to the heating zone 10; one end of the high-temperature waste gas pipe 3 is connected with the jacket 2, and the other end is connected with the exhaust port 13 of the cooling zone 11. Specifically, the heating zone 10 is used for product heating, the cooling zone 11 is used for product cooling, and the first branch pipe 12 is used for conveying the gas source in the main pipeline 1 to the heating zone 10. The system utilizes the high-temperature waste gas discharged by the low-temperature zone of the roller kiln, conveys the high-temperature waste gas into the flow channel through the jacket 2, exchanges heat with the gas source in the main pipeline 1, and the gas source is heated, so that the preheating effect is realized, and the high-temperature waste gas can be discharged to the workshop after being cooled. The preheated gas source enters the heating zone 10 through the first branch pipe 12 to continue heating, the energy required for heating is reduced, the system effectively recovers the waste heat of the roller kiln, reduces heat loss, reduces production cost, and reduces environmental pollution.

[0045] As a preferred embodiment of the present application, the roller kiln further comprises a heat preservation zone 14, and the main pipeline 1 is further connected with a second branch pipe 15, the second branch pipe 15 communicates with the heat preservation zone 14, and the second branch pipe 15 is used for conveying the gas source in the main pipeline 1 to the heat preservation zone 14. The second branch pipe 15 communicates with the heat preservation zone 14 and is used for conveying the gas source in the main pipeline 1 to the heat preservation zone 14, so as to maintain the temperature of the battery positive material in the heat preservation zone 14 and ensure the continuity and uniformity of the firing process. The system can utilize the high-temperature waste gas to simultaneously preheat the gas sources entering the heating zone 10 and the heat preservation zone 14, realizes double effect in the same jacket 2, and improves the efficiency of waste heat recovery and the efficiency of system preheating. More preferably, the inlet end 4 of the jacket 2 is arranged on one side of the heat preservation zone 14, the outlet end 5 of the jacket 2 is arranged on one side of the heating zone 10, and the gas source in the main pipeline 1 is arranged to flow from one side of the outlet end 5 of the jacket 2 to one side of the inlet end 4 of the jacket 2. That is, the high-temperature waste gas in the flow channel of the jacket 2 exchanges heat with the gas source in the main pipeline 1, realizes continuous preheating of the gas sources in the heating zone 10 and the heat preservation zone 14, the flow direction of the gas source in the main pipeline 1 is opposite to that of the high-temperature waste gas outside the main pipeline 1, the heat exchange efficiency can be improved, that is, the utilization efficiency of waste heat is improved, the production cost is further reduced, and environmental pollution is reduced.

[0046] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the present application omits the description of known components and processing technologies and processes to avoid unnecessary limitation of the present application.

Claims

1. A roller kiln waste heat utilization device, characterized in that: include: The main pipeline (1) provides gas source for the equipment to be heated and / or kept warm in the roller kiln; A jacket (2) is sleeved on the outer wall of the main pipe (1), and the inner wall thereof and the outer wall of the main pipe (1) form a flow channel; A high-temperature exhaust gas pipe (3) has one end connected to the jacket (2) and communicated with the flow channel. The high-temperature exhaust gas pipe (3) is used to transport high-temperature exhaust gas into the flow channel to preheat the gas source in the main pipeline (1).

2. The roller kiln waste heat utilization device according to claim 1, characterized in that: The main pipe (1) is a cylindrical pipe, the jacket (2) is a cylindrical hollow structure, a gap exists between the inner wall of the jacket (2) and the outer wall of the main pipe (1), and the width of the gap is set to be constant.

3. The roller kiln waste heat utilization device according to claim 2, characterized in that: The jacket (2) comprises an inlet end (4) and an outlet end (5) arranged opposite to each other, the inlet end (4) is connected to the high-temperature exhaust gas pipe (3), and the outlet end (5) is connected to the workshop through a pipeline system; The inlet end (4) is configured to transport the high-temperature exhaust gas in the high-temperature exhaust gas pipe (3) into the flow channel, and the high-temperature exhaust gas flows along the flow channel and exchanges heat with the gas source in the main pipeline (1) for cooling before being discharged into the workshop from the outlet end (5).

4. The roller kiln waste heat utilization device according to claim 3, characterized in that: The jacket (2) and the high-temperature exhaust gas pipe (3) are detachably connected via threads.

5. The roller kiln waste heat utilization device according to claim 4, characterized in that: The high-temperature exhaust gas pipe (3) is an L-shaped structure and comprises a connecting section (6) and a flow section (7), wherein the connecting section (6) is vertically connected to the flow section (7), and an inner wall of the connecting section (6) is provided with an internal thread; The inlet end (4) is provided with a first connecting port (8), the gas flow direction of the first connecting port (8) is consistent with the axial direction of the main pipeline (1), the first connecting port (8) is provided with an external thread, and the connecting section (6) is threadedly connected to the first connecting port (8).

6. The roller kiln waste heat utilization device according to claim 4, characterized in that: A second connection port (9) is provided on the side wall of the inlet end (4), the gas flow direction of the second connection port (9) is perpendicular to the axial direction of the main pipeline (1), the second connection port (9) is provided with an internal thread, the high-temperature exhaust gas pipe (3) is provided with an external thread, and the second connection port (9) is threadedly connected to the high-temperature exhaust gas pipe (3).

7. A heat exchange system, characterized in that: The roller hearth kiln waste heat utilization device and the roller hearth kiln comprise the roller hearth kiln according to any one of claims 1 to 6, wherein the roller hearth kiln comprises a temperature rising zone (10) and a temperature falling zone (11), the main pipeline (1) is connected to a first branch pipe (12), the first branch pipe (12) is connected to the temperature rising zone (10), and the first branch pipe (12) is used to transport the gas source in the main pipeline (1) to the temperature rising zone (10); One end of the high-temperature exhaust pipe (3) is connected to the jacket (2), and the other end is connected to the exhaust port (13) of the cooling zone (11).

8. A heat exchange system according to claim 7, characterized in that: The roller kiln further includes a heat preservation zone (14). The main pipeline (1) is further connected to a second branch pipe (15). The second branch pipe (15) is in communication with the heat preservation zone (14). The second branch pipe (15) is used to transport the gas source in the main pipeline (1) to the heat preservation zone (14).

9. A heat exchange system according to claim 8, characterized in that: The inlet end (4) of the jacket (2) is arranged on one side of the heat preservation zone (14), and the outlet end (5) of the jacket (2) is arranged on one side of the temperature rising zone (10).

10. A heat exchange system according to claim 9, characterized in that: The gas source in the main pipeline (1) is configured to flow from the outlet end (5) of the jacket (2) to the inlet end (4) of the jacket (2).

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