Flue waste gas treatment system and waste gas treatment system having the same

Abstract

The present invention provides a flue gas treatment system and a flue gas treatment system having the same. The flue gas treatment system includes: a flue for communicating with a kiln so that exhaust gas from the kiln flows into the flue; a cooling pack, which is disposed through the flue and at least partially located within the flue. The cooling pack has a cooling cavity for admitting a cooling medium to cool the walls of the cooling pack, thereby cooling the exhaust gas in the flue. The present invention solves the problem of poor cooling effect of the prior art flue cooling method.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a flue waste gas treatment system and a waste gas treatment system having the same. Background Art

[0002] During the production of materials like glass fiber, cement, and glass, the mineral raw materials are melted and burned in kilns, generating large amounts of waste gas. These gases are extremely hot, typically exceeding 1000°C, and sometimes even 1500°C. These gases are typically channeled through a refractory flue to cool to around 800°C before entering a waste heat boiler (HRSG), where they are recovered through heat exchange to produce steam. After absorbing heat in the HRSG, the waste gas reaches a temperature between 200°C and 400°C. The waste gas then enters an exhaust gas treatment system for dust and toxicity removal to meet environmental standards before being released into the atmosphere.

[0003] In the above-mentioned waste gas treatment process, in order to reduce the waste gas temperature, the existing technology generally uses a method of directly cooling the exhaust gas by passing cold air into the flue. This cooling method has poor cooling effect. Moreover, the mixing of air and exhaust gas in the flue leads to a sharp increase in exhaust gas emissions, resulting in a significant increase in subsequent exhaust gas treatment volume and treatment costs, and also results in a large amount of heat loss. In addition, for glass fiber kilns, the production raw materials are mainly powder raw materials. The melting process generates a large amount of fluid waste. This fluid waste flows into the flue with the exhaust gas. Due to the different composition of the waste, the waste will fly in different states in the exhaust gas, such as pure solid powder, partially liquid-encapsulated dust, and pure liquid condensed matter. Because the cooling effect of the above-mentioned flue cooling method is poor, these wastes are in a complex state and will be deposited in different locations in the flue. The deposition form also has significant differences. This makes flue cleaning and maintenance extremely difficult, shortening the useful life of the flue. In severe cases, it may even lead to shutdown and production, resulting in inevitable economic losses. Summary of the Invention

[0004] The main purpose of the present invention is to provide a flue waste gas treatment system and a waste gas treatment system having the same, so as to solve the problem of poor cooling effect of the flue cooling method in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a flue exhaust gas treatment system is provided, comprising: a flue for communicating with a kiln so that the exhaust gas in the kiln flows into the flue; a cooling bag, the cooling bag being passed through the flue, at least part of which is located in the flue, the cooling bag having a cooling cavity, the cooling cavity being used to pass a cooling medium to cool the wall surface of the cooling bag, so that the wall surface of the cooling bag can cool the exhaust gas in the flue.

[0006] Furthermore, there are multiple cooling packs, which are evenly distributed on the flue.

[0007] Furthermore, a plurality of cooling packs are arranged in parallel; and / or a plurality of cooling packs are arranged in series.

[0008] Furthermore, the flue gas treatment system includes a water inlet pipe and a steam pipe, the flue gas treatment system includes a parallel main road and multiple parallel branches connected to each other, multiple cooling packs are respectively arranged on the corresponding parallel branches, and the two ends of the parallel main road are respectively connected to the water inlet pipe and the steam pipe, so that the multiple cooling packs are arranged in parallel; or the flue gas treatment system includes a series pipeline, multiple cooling packs are all arranged on the series pipeline, and the two ends of the series pipeline are respectively connected to the water inlet pipe and the steam pipe, so that the multiple cooling packs are arranged in series.

[0009] Furthermore, multiple cooling packs are divided into multiple cooling groups, and the multiple cooling groups are arranged at intervals along the gas flow direction of the flue. A water inlet pipe and a steam pipe form a group of circulation pipe groups, and there are multiple groups of circulation pipe groups, each group of circulation pipe groups is respectively arranged between two adjacent cooling groups in the multiple cooling groups; wherein, each cooling group includes at least one cooling pack.

[0010] Furthermore, the flue exhaust gas treatment system also includes: a first control valve, which is arranged on the water inlet pipe to control the water inlet opening of the water inlet pipe; a first detection component, which is used to detect the temperature in the flue, and the first detection component is connected to the control valve to control the opening of the control valve according to the detection result of the first detection component.

[0011] Furthermore, there are multiple cooling packs, and the flue includes: multiple flue segments connected in sequence, with a preset angle between two adjacent flue segments, and at least one of the multiple flue segments is provided with at least one cooling pack.

[0012] Furthermore, there are multiple cooling packs on the flue section; the multiple cooling packs are arranged at intervals around the circumference of the flue section; and / or the multiple cooling packs are arranged at intervals along the gas flow direction of the flue section.

[0013] Furthermore, the gas flow cross-section of the flue section is rectangular, and the flue section has two oppositely arranged first walls and two oppositely arranged second walls; wherein, the two first walls are each provided with a plurality of cooling packs, and along the gas flow direction of the flue section, the plurality of cooling packs on the two first walls are arranged alternately in sequence; and / or, the two second walls are each provided with a plurality of cooling packs, and along the gas flow direction of the flue section, the plurality of cooling packs on the two second walls are arranged alternately in sequence.

[0014] Furthermore, the multiple flue sections include: a first flue section, a second flue section and a third flue section connected in sequence, the first flue section is used to be connected to the kiln, the third flue section is used to be connected to the exhaust gas treatment device, the first flue section and the third flue section are arranged opposite to each other, and the first flue section, the second flue section and the third flue section all have multiple cooling bags; wherein, a cleaning hole is provided at the bottom of the second flue section to process the sediment in the flue through the cleaning hole.

[0015] Furthermore, the cooling pack is a cylindrical structure, and the outer diameter of the cooling pack ranges from 30 mm to 200 mm; and / or the length of the cooling pack in the flue ranges from 100 mm to 1000 mm.

[0016] Furthermore, the flue exhaust gas treatment system also includes: a driving component, which is connected to the cooling pack to drive the cooling pack to be movably arranged on the flue; a second detection component, which is used to detect the temperature in the flue, and the second detection component is connected to the driving component to control the start-up of the driving component according to the detection result of the second detection component.

[0017] According to another aspect of the present invention, there is provided an exhaust gas treatment system, comprising: the above-mentioned flue exhaust gas treatment system; a kiln and an exhaust gas treatment device, wherein the kiln is connected to the inlet of the flue exhaust gas treatment system, and the exhaust gas treatment device is connected to the outlet of the flue exhaust gas treatment system.

[0018] Applying the technical solution of the present invention, the present invention provides a flue waste gas treatment system, comprising: a flue for communicating with a kiln so that the waste gas in the kiln flows into the flue; a cooling bag, the cooling bag is passed through the flue, at least part of the cooling bag is located in the flue, the cooling bag has a cooling cavity, the cooling cavity is used to pass a cooling medium to cool the wall surface of the cooling bag, so that the wall surface of the cooling bag cools the waste gas in the flue. Through the above arrangement, the cooling medium will not directly mix with the waste gas in the flue, thereby not increasing the waste gas volume and reducing heat loss (i.e., volatilization and loss of cooling volume). In this way, the cooling effect achieved by the above cooling method is better, and the waste gas in the waste gas can be quickly deposited to the bottom of the flue, which is convenient for subsequent cleaning and maintenance of the flue. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 A schematic structural diagram of an embodiment of a flue gas exhaust system according to the present invention is shown;

[0021] Figure 2It shows a schematic structural diagram of a plurality of cooling packs connected in parallel in a flue gas exhaust system according to the present invention;

[0022] Figure 3 A schematic structural diagram of a flue gas exhaust system according to the present invention is shown with multiple cooling packages connected in series.

[0023] The above drawings include the following reference numerals:

[0024] 1. Flue; 20. Cooling package; 101. Water inlet pipe; 102. Steam pipe; 110. Parallel main line; 111. Parallel branch line; 120. Series pipe; 2. Cooling group; 103. Circulation pipe group; 10. Flue section; 11. First flue section; 12. Second flue section; 13. Third flue section; 14. Cleaning holes; 3. Metal pipe. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Please refer to Figures 1 to 3 The present invention provides a flue waste gas treatment system, comprising: a flue 1 for communicating with a kiln so that the waste gas in the kiln flows into the flue 1; a cooling bag 20, the cooling bag 20 is provided on the flue 1, at least part of the cooling bag 20 is located in the flue 1, the cooling bag 20 has a cooling cavity, the cooling cavity is used to pass a cooling medium to cool the wall surface of the cooling bag 20, so that the wall surface of the cooling bag 20 cools the waste gas in the flue 1. Through the above arrangement, the cooling medium will not directly mix with the waste gas in the flue, thereby not increasing the waste gas volume and reducing heat loss (i.e., volatilization and loss of cooling volume). In this way, the cooling effect achieved by the above cooling method is better, and the waste gas in the waste gas can be quickly deposited to the bottom of the flue, which is convenient for subsequent cleaning and maintenance of the flue.

[0027] Preferably, there are multiple cooling packs 20, and the multiple cooling packs 20 are evenly distributed on the flue 1 to further improve the cooling effect of the flue.

[0028] Optionally, a plurality of cooling packs 20 are arranged in parallel; and / or, a plurality of cooling packs 20 are arranged in series.

[0029] In order to realize the parallel and series connection of multiple cooling packs 20, in the present application, the cooling medium is liquid, which can be optionally cooling water. The flue gas treatment system includes a water inlet pipe 101 and a steam pipe 102. The flue gas treatment system includes a parallel main road 110 and a plurality of parallel branches 111 connected to each other. The multiple cooling packs 20 are respectively arranged on the corresponding parallel branches 111, and the two ends of the parallel main road 110 are respectively connected to the water inlet pipe 101 and the steam pipe 102, so that the multiple cooling packs 20 are arranged in parallel; or the flue gas treatment system includes a series pipeline 120, and the multiple cooling packs 20 are all arranged on the series pipeline 120, and the two ends of the series pipeline 120 are respectively connected to the water inlet pipe 101 and the steam pipe 102, so that the multiple cooling packs 20 are arranged in series.

[0030] Specifically, the arrangement of the plurality of cooling packs 20 has the following scheme:

[0031] (1) multiple cooling packs (20) are connected in parallel; or,

[0032] (2) multiple cooling packs 20 are arranged in series; or,

[0033] (3) A plurality of cooling packs 20 are arranged both in parallel and in series.

[0034] Among them, if the exhaust gas temperature is too high, or the size of the cooling pack (including outer diameter and / or length) is small, then the multiple cooling packs 20 need to be quickly in and out to achieve a better cooling effect, so this parallel connection method is more suitable (such as Figure 2 As shown in FIG, there are two groups of cooling packs 20 connected in parallel, each group includes two cooling packs 20 arranged in parallel, and then the water inlet end of the parallel main path 110 of each group is connected to the water inlet pipe 101, and the water outlet end of the parallel main path 110 of each group is connected to the steam pipe 102. When the temperature of the exhaust gas is low, or the size design of the cooling pack 20 is also large (that is, the outer diameter and / or length is large), the series connection method (such as FIG) is suitable. Figure 3 As shown), the four cooling packages 20 are connected in series in sequence, the water inlet end of the series pipeline 120 is connected to the water inlet pipe 101, and the water outlet end of the series pipeline 120 is connected to the steam pipe 102.

[0035] Specifically, the multiple cooling packs 20 are divided into multiple cooling groups 2, which are spaced apart along the gas flow direction of the flue 1. A water inlet pipe 101 and a steam pipe 102 form a circulation pipe group 103. There are multiple circulation pipe groups 103, each of which is located between two adjacent cooling groups 2. Each cooling group 2 includes at least one cooling pack 20. This arrangement ensures a reasonable layout of the water inlet pipes and steam pipes, ensuring sufficient cooling water in each cooling pack 20.

[0036] Each water inlet pipe 101 is connected to a softened water network or a tap water network, and each steam pipe 102 is connected to a steam network, so that steam flows to the steam network.

[0037] During the cooling process of the present application, the cooling pack 20 will absorb a large amount of heat carried by the flue gas / waste gas, thereby achieving cooling and cooling of the waste gas, causing the smoke and volatile substances in the waste gas to quickly condense and settle at the bottom of the flue, making it easier to clean up later and avoiding difficulties in handling sediments in the flue in the subsequent processes. At the same time, after the cooling water absorbs the heat carried by the waste gas, the water flow inside it forms high-temperature water vapor due to rapid heating, which is transported to the subsequent production process (steam pipe network) through the steam pipe 102 to achieve heat recovery and utilization. The above solution effectively solves the problem of a sharp increase in waste gas treatment volume and a large amount of waste of heat energy carried by the waste gas caused by directly introducing air to cool the waste gas in the prior art.

[0038] In an embodiment of the present application, there are multiple cooling packs 20, and the flue 1 includes: multiple flue sections 10 connected in sequence, with a preset angle between two adjacent flue sections 10, and at least one flue section 10 among the multiple flue sections 10 is provided with at least one cooling pack 20.

[0039] In order to achieve a better cooling effect, there are multiple cooling packs 20 on the flue section 10; multiple cooling packs 20 are arranged at intervals around the circumference of the flue section 10; and / or, multiple cooling packs 20 are arranged at intervals along the gas flow direction of the flue section 10.

[0040] Specifically, the flue section 10 has a rectangular gas flow cross-section and comprises two opposing first walls and two opposing second walls. Multiple cooling packs 20 are disposed on each of the two first walls, with the cooling packs 20 arranged alternately along the gas flow direction of the flue section 10. Alternatively, multiple cooling packs 20 are disposed on each of the two second walls, with the cooling packs 20 arranged alternately along the gas flow direction of the flue section 10. These arrangements achieve a better cooling effect.

[0041] Optionally, each cooling group 2 includes a plurality of cooling packs 20 , and the plurality of cooling packs 20 of each cooling group 2 are arranged at intervals along the width direction of the corresponding outer wall of the flue 1 .

[0042] like Figure 1As shown, the multiple flue segments 10 include: a first flue segment 11, a second flue segment 12 and a third flue segment 13 connected in sequence, the first flue segment 11 is used to be connected to the kiln, and the third flue segment 13 is used to be connected to the exhaust gas treatment device. The first flue segment 11 and the third flue segment 13 are arranged opposite to each other, and the first flue segment 11, the second flue segment 12 and the third flue segment 13 all have multiple cooling bags 20 to achieve better cooling effect; wherein, a cleaning hole 14 is provided at the bottom of the second flue segment 12 to process the sediment in the flue 1 through the cleaning hole 14, so as to clean the sediment in the flue in time to avoid blockage or damage of the flue 1.

[0043] Specifically, the cooling pack 20 is a cylindrical structure, and the outer diameter of the cooling pack 20 ranges from 30 mm to 200 mm; and / or the length of the cooling pack 20 in the flue 1 ranges from 100 mm to 1000 mm.

[0044] The flue 1 has a plurality of wall holes, and the cooling pack 20 is passed through the wall holes. The diameter of the wall holes is 6 mm to 60 mm larger than the outer diameter of the cooling pack 20. The cooling pack 20 is a hollow columnar structure.

[0045] Specifically, along the extension direction of the corresponding flue section 10 , the distance between two adjacent cooling packs 20 ranges from 500 mm to 1000 mm.

[0046] In actual implementation, the cooling packs 20 are arranged according to the actual heat / cooling requirements of the flue gas, and the arrangement density and insertion depth of the cooling packs 20 are adjusted.

[0047] During the specific implementation of the embodiments of the present application, the arrangement of the cooling water bags can be set according to the kiln production capacity and the exhaust gas temperature. Taking glass fiber production as an example, for a kiln with an annual output of more than 100,000 tons, due to the large amount of exhaust gas and the large amount of heat energy carried, the cooling bags 20 are arranged in multiple rows in a regular or staggered manner on the periphery of the flue 1. This can maximize the cooling effect and realize the sedimentation of smoke in the exhaust gas to achieve better cooling and energy recovery effects.

[0048] In one embodiment of the present application, the flue gas and exhaust gas treatment system further includes a detection component and a control valve. The control valve is disposed on the water inlet pipe 101. The detection component is used to detect the flue gas temperature within the flue. The detection component is connected to the control valve to control the opening of the control valve based on the detection result of the detection component to adjust the flow rate of cooling water. This arrangement can achieve energy conservation and emission reduction, thereby reducing energy consumption.

[0049] Specifically, there are multiple control valves, and the multiple control valves are set in a one-to-one correspondence with the multiple water inlet pipes 101. The detection component is connected to the multiple water inlet pipes 101 to control the opening of the multiple control valves respectively according to the detection results of the detection component.

[0050] Specifically, when the cooling pack 20 requires maintenance, the control valve is closed.

[0051] Among them, the detection component is a temperature sensor. When the temperature of the flue gas / exhaust gas in the flue is below the predetermined temperature value, some control valves are controlled to be closed to save energy consumption; when the temperature of the flue gas / exhaust gas in the flue is above the predetermined temperature value, the opening of all control valves is controlled to be at the maximum opening to achieve a better cooling effect.

[0052] In another embodiment of the present application, the flue exhaust gas treatment system also includes: a driving component, which is driven and connected to the cooling bag 20 to drive the cooling bag 20 to be movably arranged on the flue 1; a second detection component, which is used to detect the temperature in the flue 1, and the second detection component is connected to the driving component to control the start-up of the driving component according to the detection result of the second detection component.

[0053] Each cooling pack 20 is movably disposed on the flue 1. The flue gas and exhaust gas treatment system includes a detection component for detecting the temperature within the flue 1. The detection component is connected to each cooling pack 20 to control the movement of each cooling pack 20 based on the detection results of the detection component. This allows the cooling pack 20 to select the length within the flue according to the actual temperature. In this way, part of the cooling section of the cooling pack 20 does not need to be located in the flue for a long time, thereby increasing the service life of the cooling pack 20. The detection component is a temperature sensor.

[0054] In the embodiment of the present application, the cooling pack 20 is made of a high-temperature resistant material. Optionally, the high-temperature resistant material can be a high-temperature resistant alloy, such as a tungsten alloy or a titanium alloy. The high-temperature resistant material can effectively and quickly exchange heat between the cooling pack 20 and the high-temperature flue gas or smoke, while preventing damage to the cooling pack 20 caused by long-term operation under high-temperature conditions. Typical materials for the cooling pack 20 are high-temperature resistant alloys that are resistant to high temperatures and easily conduct heat, such as tungsten alloys.

[0055] The present invention also provides a waste gas treatment system, comprising: the above-mentioned flue waste gas treatment system; a kiln and a waste gas treatment device, the kiln is connected to the inlet of the flue waste gas treatment system, and the waste gas treatment device is connected to the outlet of the flue waste gas treatment system.

[0056] Specifically, the exhaust gas treatment system also includes a waste heat recovery device and a metal pipe 3. The flue section 10 at the tail end is connected to the metal pipe 3, which is in turn connected to the heat exchange device. The flue gas / waste gas treated by the flue gas treatment system is connected to the heat exchange device (waste heat recovery device) via the metal pipe 3, allowing the exchange, recovery, and reuse of residual heat in the exhaust gas. This minimizes energy waste and reduces the difficulty of treating overheated exhaust gas in subsequent processes.

[0057] The flue section 10 at the tail end may also be directly connected to the waste heat recovery device.

[0058] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0059] The present invention provides a flue waste gas treatment system, comprising: a flue 1 for communicating with a kiln so that the waste gas in the kiln flows into the flue 1; a cooling bag 20, the cooling bag 20 being passed through the flue 1, at least part of which is located in the flue 1, the cooling bag 20 having a cooling cavity, the cooling cavity being used to pass a cooling medium to cool the wall surface of the cooling bag 20, so that the wall surface of the cooling bag 20 cools the waste gas in the flue 1. Through the above arrangement, the cooling medium will not directly mix with the waste gas in the flue, thereby not increasing the waste gas volume and reducing heat loss (i.e., volatilization and loss of cooling volume). In this way, the cooling effect achieved by the above cooling method is better, and waste gas substances in the waste gas can be quickly deposited at the bottom of the flue, facilitating subsequent cleaning and maintenance of the flue.

[0060] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A flue gas treatment system, characterized in that: include: A flue (1) is used to communicate with the kiln so that the exhaust gas in the kiln flows into the flue (1); A cooling bag (20), the cooling bag (20) being arranged on the flue (1), at least a portion of the cooling bag (20) being located in the flue (1), the cooling bag (20) having a cooling cavity, the cooling cavity being used to pass a cooling medium to cool a wall surface of the cooling bag (20), so that the wall surface of the cooling bag (20) cools the exhaust gas in the flue (1); There are a plurality of cooling packs (20), and the plurality of cooling packs (20) are evenly distributed on the flue (1); A plurality of the cooling packs (20) are arranged in parallel; and / or a plurality of the cooling packs (20) are arranged in series; The flue gas treatment system includes a water inlet pipe (101) and a steam pipe (102); The flue gas treatment system comprises a parallel main path (110) and a plurality of parallel branches (111) connected to each other, a plurality of cooling packs (20) are respectively arranged on the corresponding parallel branches (111), and both ends of the parallel main path (110) are respectively connected to the water inlet pipe (101) and the steam pipe (102), so that the plurality of cooling packs (20) are arranged in parallel; or, The flue gas treatment system comprises a series pipeline (120), a plurality of cooling packs (20) are arranged on the series pipeline (120), and both ends of the series pipeline (120) are respectively connected to the water inlet pipeline (101) and the steam pipeline (102), so that the plurality of cooling packs (20) are arranged in series; The flue (1) comprises: a plurality of flue sections (10) connected in sequence, wherein a preset angle is formed between two adjacent flue sections (10), and at least one of the plurality of flue sections (10) is provided with at least one cooling bag (20); the gas flow cross section of the flue section (10) is rectangular, and the flue section (10) has two first walls arranged opposite to each other and two second walls arranged opposite to each other; wherein, the two first walls are both provided with a plurality of cooling bags (20), and along the gas flow direction of the flue section (10), the plurality of cooling bags (20) on the two first walls are arranged in an interlaced manner; and / or, the two second walls are both provided with a plurality of cooling bags (20), and along the gas flow direction of the flue section (10), the plurality of cooling bags (20) on the two second walls are arranged in an interlaced manner; The flue gas treatment system further comprises: A driving assembly, the driving assembly being connected to the cooling pack (20) to drive the cooling pack (20) to be movably arranged on the flue (1); The second detection component is used to detect the temperature in the flue (1), and the second detection component is connected to the driving component to control the start of the driving component according to the detection result of the second detection component.

2. The flue gas treatment system according to claim 1, characterized in that: The plurality of cooling packs (20) are divided into a plurality of cooling groups (2), the plurality of cooling groups (2) are arranged at intervals along the gas flow direction of the flue (1), one water inlet pipe (101) and one steam pipe (102) form a group of circulation pipe groups (103), the circulation pipe groups (103) are multiple groups, and each group of the circulation pipe groups (103) is respectively arranged between two adjacent cooling groups (2) among the plurality of cooling groups (2); Wherein, each cooling group (2) includes at least one cooling pack (20).

3. The flue gas treatment system according to claim 1, characterized in that: The flue gas treatment system further comprises: a first control valve, the first control valve being arranged on the water inlet pipe (101) to control the water inlet opening of the water inlet pipe (101); The first detection component is used to detect the temperature in the flue (1), and the first detection component is connected to the control valve to control the opening of the control valve according to the detection result of the first detection component.

4. The flue gas treatment system according to claim 1, characterized in that: There are multiple cooling packs (20) on the flue section (10); A plurality of cooling packs (20) are arranged at intervals around the circumference of the flue section (10); and / or, The plurality of cooling packs (20) are arranged at intervals along the gas flow direction of the flue section (10).

5. The flue gas treatment system according to claim 1, characterized in that: The plurality of flue sections (10) include: A first flue section (11), a second flue section (12), and a third flue section (13) are sequentially connected, wherein the first flue section (11) is used to be connected to the kiln, and the third flue section (13) is used to be connected to the exhaust gas treatment device, the first flue section (11) and the third flue section (13) are arranged opposite to each other, and the first flue section (11), the second flue section (12), and the third flue section (13) all have a plurality of cooling packs (20); A cleaning hole (14) is provided at the bottom of the second flue section (12) so as to process sediment in the flue (1) through the cleaning hole (14).

6. The flue gas treatment system according to any one of claims 1 to 5, characterized in that: The cooling pack (20) is a cylindrical structure, and the outer diameter of the cooling pack (20) ranges from 30 mm to 200 mm; and / or, The length of the cooling pack (20) located in the flue (1) ranges from 100 mm to 1000 mm.

7. An exhaust gas treatment system, characterized in that: include: The flue gas treatment system according to any one of claims 1 to 6; A kiln and an exhaust gas treatment device, wherein the kiln is connected to the inlet of the flue exhaust gas treatment system, and the exhaust gas treatment device is connected to the outlet of the flue exhaust gas treatment system.

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