Tail gas treatment system

Abstract

The invention relates to the field of tail gas treatment, and discloses a tail gas treatment system. The device comprises an absorption tower and a purification device, two opposite side walls of the absorption tower are respectively and correspondingly provided with a first inlet-outlet and a second inlet-outlet, and the absorption tower is provided with a guide rail assembly which extends from one side outside the absorption tower, penetrates through the first inlet-outlet and the second inlet-outlet to the other side outside the absorption tower; the purification device is slidably arranged on the guide rail assembly and can be detachably installed between a first inlet and outlet and a second inlet and outlet of the absorption tower in a sealed mode, and the length of the guide rail assembly is set to enable the purification device located in the absorption tower to be detached from the first inlet and outlet or the second inlet and outlet in a sliding mode. Another purification device which is slidably mounted on the guide rail assembly and positioned outside the absorption tower can be slidably mounted in the absorption tower through the second inlet / outlet or the first inlet / outlet. By means of the scheme, the tail gas treatment system does not need to be shut down, replacement and installation of the purification device can be achieved, and continuity of tail gas treatment is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of tail gas treatment, and in particular to a tail gas treatment system. Background Art

[0002] During the industrial production process, a large amount of exhaust gas will be generated. If this exhaust gas is not properly treated, it may cause serious pollution to the environment and even endanger human health.

[0003] A negative pressure system is an effective exhaust gas treatment system. It operates by creating an environment below atmospheric pressure, drawing exhaust gas into the system. A purification device then separates impurities from the exhaust gas, ensuring that the exhaust gas discharged into the atmosphere meets environmental standards. During the exhaust gas treatment process, large amounts of particulate matter, soot, and other impurities contained in the exhaust gas can be deposited in the purification device, potentially causing blockage. Therefore, to ensure efficient operation of the purification device, it must be regularly cleaned and maintained.

[0004] However, the existing method for cleaning and repairing the purification device usually involves shutting down the negative pressure system and having maintenance personnel enter the negative pressure system to clean and repair the purification device, which not only reduces the exhaust gas treatment efficiency but also increases the safety risks of manual operation. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problem that the negative pressure system needs to be shut down for processing during the cleaning and maintenance of the purification device, which leads to reduced exhaust gas treatment efficiency and increased safety risks of manual operation. The present invention provides an exhaust gas treatment system that can clean and repair the purification device without shutting down, which can effectively improve the exhaust gas treatment efficiency and reduce the safety risks of manual operation.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an exhaust gas treatment system, comprising: an absorption tower, wherein the opposite side walls of the absorption tower are respectively provided with a first inlet and a second inlet, the absorption tower is provided with a guide rail assembly, and the guide rail assembly extends from one side of the outside of the absorption tower through the first inlet and the second inlet to the other side of the outside of the absorption tower; and a purification device, the purification device is slidably arranged on the guide rail assembly, and can be detachably and sealedly installed between the first inlet and the second inlet of the absorption tower, wherein the length of the guide rail assembly is set so that when the purification device located in the absorption tower is slid and removed from the first inlet and the second inlet, another purification device slidably installed on the guide rail assembly and located outside the absorption tower can be slid into the absorption tower via the second inlet and the first inlet.

[0007] Preferably, the guide rail assembly includes: a first guide rail, which is configured to extend horizontally outward from the first inlet and outlet; a second guide rail, which is installed between the first inlet and outlet and the second inlet and outlet, and is docked with the first guide rail; and a third guide rail, which is configured to extend horizontally outward from the second inlet and outlet, and is docked with the second guide rail, wherein the lengths of the first guide rail and the third guide rail are configured to be greater than or equal to the length of the purification device.

[0008] Preferably, the guide rail assembly further comprises a limiting member, which is installed at both ends of the guide rail assembly away from the absorption tower and is configured to limit the purification device from detaching from the guide rail assembly along the extension direction of the guide rail assembly.

[0009] Preferably, one of the guide rail assembly and the purification device is provided with a slider, and the other of the guide rail assembly and the purification device is provided with a slide groove, and the slider and the slide groove are slidably matched.

[0010] Preferably, the purification device comprises: a box body, the bottom of the box body is set as a screen, the top of the box body is set as an opening; and a filler, the filler is set inside the box body.

[0011] Preferably, the contours of the opposite side walls of the box body are adapted to the contours of the first inlet and the second inlet, so that the opposite side walls of the purification device located in the absorption tower can seal the first inlet and the second inlet.

[0012] Preferably, the box body also includes a first connecting plate, which is arranged on the outer wall of the box body, and a second connecting plate is provided on the outer wall of the first inlet and / or the second inlet and outlet of the absorption tower, and the first connecting plate and the second connecting plate are detachably connected.

[0013] Preferably, the purification device located in the absorption tower is detachably connected to another purification device that is slidably mounted on the guide rail assembly and located outside the absorption tower, so that when the purification device located in the absorption tower is slidably removed from the first inlet and outlet or the second inlet and outlet, the other purification device that is slidably mounted on the guide rail assembly and located outside the absorption tower can be slidably installed into the absorption tower via the second inlet and outlet or the first inlet and outlet.

[0014] Preferably, an inspection platform is provided on the outer wall of the absorption tower.

[0015] Preferably, the maintenance platform includes a platform and a guardrail installed on the platform.

[0016] Through the above technical solution, the guide rail assembly is arranged inside and outside the absorption tower, so that the purification device can enter the absorption tower and slide out of the absorption tower from the first inlet and the second inlet, so that the purification device only needs to slide the purification device during the installation and disassembly process, which improves the convenience and efficiency of the installation and disassembly of the purification device; the purification device can seal the setting of the first inlet and the second inlet, thereby ensuring the sealing of the absorption tower, so that the exhaust gas treatment system will not leak exhaust gas during the exhaust gas treatment process, thereby improving the safety of the exhaust gas treatment system; the length of the guide rail assembly is set, so that when the purification device in the absorption tower is moved out, the purification device located outside the absorption tower and slidingly arranged on the guide rail assembly can enter the absorption tower accordingly, and there is no need to shut down the exhaust gas treatment system. Only the fan frequency of the system needs to be reduced to achieve the replacement and installation of the purification device, thereby ensuring the continuity of exhaust gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 2. It is a schematic structural diagram of the tail gas treatment system of the present invention, in which the purification device is slidably mounted on a guide rail assembly and is located outside the absorption tower;

[0018] Figure 2 Schematic diagram of the structure of the tail gas treatment system of the present invention in which one purification device is located inside the absorption tower and the other purification device is located outside the absorption tower;

[0019] Figure 3 This is a structural schematic diagram of the exhaust gas treatment system of the present invention, in which when the purification device located in the absorption tower is slidably removed from the second inlet and outlet, another purification device slidably mounted on the guide rail assembly and located outside the absorption tower is slidably installed into the absorption tower through the first inlet and outlet;

[0020] Figure 4 It is a schematic structural diagram of the tail gas treatment system of the present invention excluding the purification device;

[0021] Figure 5 yes Figure 4 Side view at mid-AA;

[0022] Figure 6 is a schematic structural diagram of a box body of a purification device of an exhaust gas treatment system of the present invention; and

[0023] Figure 7 It is a schematic structural diagram of the purification device of the tail gas treatment system of the present invention.

[0024] Description of Reference Numerals

[0025] 1. Absorption tower; 11. First inlet and outlet; 12. Second inlet and outlet; 13. Guide rail assembly; 131. First guide rail; 132. Second guide rail; 133. Third guide rail; 134. Limiting member; 14. Second connecting plate; 2. Purification device; 21. Box; 211. Screen; 212. First connecting plate; 22. Filler; 3. Inspection platform; 31. Platform; 32. Guardrail. DETAILED DESCRIPTION

[0026] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0027] like Figures 1 to 4 As shown, the present invention provides an exhaust gas treatment system, including an absorption tower 1 and a purification device 2, wherein the opposite side walls of the absorption tower 1 are respectively provided with a first inlet and outlet 11 and a second inlet and outlet 12, and the absorption tower 1 is provided with a guide rail assembly 13, which extends from one side of the outside of the absorption tower 1 through the first inlet and outlet 11 and the second inlet and outlet 12 to the other side of the outside of the absorption tower 1; the purification device 2 is slidably arranged on the guide rail assembly 13, and can be detachably and sealedly installed between the first inlet and outlet 11 and the second inlet and outlet 12 of the absorption tower 1, wherein the length of the guide rail assembly 13 is set so that when the purification device 2 located in the absorption tower 1 is slidably removed from the first inlet and outlet 11 or the second inlet and outlet 12, another purification device 2 slidably mounted on the guide rail assembly 13 and located outside the absorption tower 1 can be slid into the absorption tower 1 via the second inlet and outlet 12 or the first inlet and outlet 11. By means of the guide rail assembly 13 arranged inside and outside the absorption tower 1, the purification device 2 can enter and slide out of the absorption tower 1 from the first inlet and outlet 11 and the second inlet and outlet 12, so that the purification device 2 only needs to slide the purification device 2 during the installation and disassembly process, thereby improving the convenience and efficiency of the installation and disassembly of the purification device 2; the purification device 2 can seal the setting of the first inlet and outlet 11 and the second inlet and outlet 12, thereby ensuring the sealing of the absorption tower 1, so that the exhaust gas treatment system will not leak exhaust gas during the exhaust gas treatment process, thereby improving the safety of the exhaust gas treatment system; the length of the guide rail assembly 13 is set, so that when the purification device 2 in the absorption tower 1 is replaced, the purification device 2 located outside the absorption tower 1 and slidingly arranged on the guide rail assembly 13 can continuously enter the absorption tower 1, and there is no need to shut down the exhaust gas treatment system. Only the fan frequency of the system needs to be reduced to achieve the replacement and installation of the purification device 2, thereby ensuring the continuity of exhaust gas treatment.

[0028] like Figures 1 to 2When the tail gas treatment system is required to treat the tail gas, the purification device 2 is placed on the guide rail assembly 13 outside the absorption tower 1 and moved from the first inlet and outlet 11 to the inside of the absorption tower 1 along the extension direction of the guide rail assembly 13. The purification device 2 can seal the first inlet and outlet 11 and the second inlet and outlet 12 to install the purification device 2 in the absorption tower 1. The tail gas treatment system can be turned on to treat the tail gas; Figures 2 to 3 When the purification device 2 in the absorption tower 1 needs to be cleaned or repaired, the purification device 2 installed in the absorption tower 1 is moved from the second inlet and outlet 12 along the extension direction of the guide rail assembly 13 to the guide rail assembly 13 on the other side of the outside of the absorption tower 1. While the purification device 2 in the absorption tower 1 is moved out of the absorption tower 1, the other purification device 2 located outside the absorption tower 1 can also slide into the absorption tower 1 from the first inlet and outlet 11, which not only improves the replacement efficiency of the purification device 2, but also ensures the continuity of the operation of the exhaust gas treatment system, improves the exhaust gas treatment efficiency of the system, and does not require personnel to enter the absorption tower 1 to operate, effectively reducing the safety risks of manual operation.

[0029] In order to improve the smoothness of the purification device 2 on the guide rail assembly 13 , lubricating oil may be applied to the bottom of the purification device 2 or the guide rail assembly 13 .

[0030] In order to conveniently move the purification device 2 to or away from the guide rail assembly 13 , the purification device 2 may be hung by a crane.

[0031] like Figure 4 As shown, the guide rail assembly 13 includes a first guide rail 131, a second guide rail 132 and a third guide rail 133, the first guide rail 131 is configured to extend horizontally outward from the first inlet and outlet 11; the second guide rail 132 is installed between the first inlet and outlet 11 and the second inlet and outlet 12, and is docked with the first guide rail 131; the third guide rail 133 is configured to extend horizontally outward from the second inlet and outlet 12, and is docked with the second guide rail 132, wherein the lengths of the first guide rail 131 and the third guide rail 133 are configured to be greater than or equal to the length of the purification device 2. The docking arrangement between the first guide rail 131, the second guide rail 132 and the third guide rail 133 enables the guide rail assembly 13 to form a continuous and smooth sliding path inside and outside the absorption tower 1, so that the purification device 2 can slide smoothly inside or outside the absorption tower 1 on the guide rail assembly 13; the length setting of the first guide rail 131 and the third guide rail 133 enables the purification device 2 to be placed on the first guide rail 131 and the third guide rail 133 outside the absorption tower 1, so that the purification device 2 can be placed on the guide rail assembly 13 before entering the absorption tower 1, and can be placed on the guide rail assembly 13 after moving out of the absorption tower 1, providing effective support for the purification device 2, so as to achieve uninterrupted replacement of the purification device 2 in the absorption tower 1.

[0032] Optionally, the second guide rail 132 is made of channel steel or section steel and is fixed in the absorption tower 1 by welding.

[0033] Furthermore, the guide rail assembly 13 also includes a limiter 134, which is installed at both ends of the guide rail assembly 13 away from the absorption tower 1 and is configured to limit the purification device 2 from detaching from the guide rail assembly 13 along the extension direction of the guide rail assembly 13. When the purification device 2 is located on the first guide rail 131 or the third guide rail 133, the limiter 134 can prevent the purification device 2 from falling off the guide rail assembly 13 due to movement of the purification device 2, external collision, or vibration of the exhaust gas treatment system, thereby ensuring the safety of the purification device 2 when it is moved along the guide rail assembly 13 or placed on the guide rail assembly 13.

[0034] As an embodiment, the limiting member 134 can be a baffle provided on the guide rail assembly 13. The baffle can be detachably connected to the guide rail assembly 13 or fixedly connected by welding.

[0035] As an embodiment, the limiting member 134 can be made of iron materials such as angle iron, channel steel or section steel.

[0036] Furthermore, one of the guide rail assembly 13 and the purification device 2 is provided with a slider, and the other of the guide rail assembly 13 and the purification device 2 is provided with a slide groove, and the slider and the slide groove are slidably engaged. The engagement of the slider and the slide groove not only enables the purification device 2 to slide stably on the guide rail assembly 13, but also prevents the purification device 2 from falling in a direction that deviates from the extension direction of the guide rail assembly 13 or from shaking during the sliding process, thereby ensuring the stable sliding of the purification device 2 on the guide rail assembly 13.

[0037] As an embodiment, a slider is provided at the bottom of the purification device 2, and a slide groove is provided on the guide rail assembly 13, and the slider and the slide groove are slidably matched.

[0038] As an alternative embodiment, a slide groove is provided at the bottom of the purification device 2, and a slider is provided on the guide rail assembly 13, and the slider and the slide groove are slidably matched.

[0039] like Figure 5 and Figure 6As shown, the purification device 2 includes a box body 21 and a filler 22 . The bottom of the box body 21 is provided with a screen 211 , and the top of the box body 21 is provided with an opening. The filler 22 is provided inside the box body 21 . The screen 211 at the bottom of the box 21 not only provides support for the filler 22, but also enables the exhaust gas to flow from the bottom of the absorption tower 1 through the box 21 to the top of the absorption tower 1, thereby ensuring the circulation of the exhaust gas; the filler 22 can block the solid particles in the exhaust gas flowing from the bottom of the absorption tower 1 to the top of the absorption tower 1, and the liquid is sprayed from the top of the absorption tower 1 onto the filler 22 in the box 21 and flows down along the surface of the filler 22, while the exhaust gas is fed into the bottom of the absorption tower 1 and passes through the gaps of the filler 22 in the box 21 in countercurrent with the liquid. On the surface of the filler 22, the exhaust gas is in close contact with the liquid for absorption and reaction. The setting of the filler 22 increases the contact area between the exhaust gas and the liquid, so that the harmful substances in the exhaust gas are fully in contact with the liquid and react, thereby improving the exhaust gas treatment efficiency; when the exhaust gas passes through the filler 22, the flow rate will be slowed down, which is conducive to full contact and reaction between the exhaust gas and the liquid; the opening of the box 21 is set so that the purified exhaust gas can enter the top of the absorption tower 1 after passing through the filler 22, and it is convenient to replace and clean the filler 22. The liquid is selected according to the harmful substances to be absorbed in the tail gas, for example, it can be water or a solution containing a specific chemical agent, such as sodium hydroxide absorption liquid.

[0040] Optionally, the absorption tower 1 is a spray tower.

[0041] Furthermore, the outer shape of the box body 21 of the purification device 2 is consistent with the shape of the absorption tower 1 to ensure that the box body 21 can be installed in the absorption tower 1 and is in sealed contact with the absorption tower 1 .

[0042] like Figures 4 to 7 As shown, the absorption tower 1 is a rectangular parallelepiped, and the housing 21 of the purification device 2 is designed to be a rectangular parallelepiped that matches the absorption tower 1 .

[0043] Optionally, the box body 21 is made of metal materials such as carbon steel, stainless steel or galvanized sheet.

[0044] Optionally, the filler 22 is configured to be spherical. Configuring the filler 22 to be spherical can increase its surface area, thereby increasing the contact area between the exhaust gas and the liquid, thereby improving the treatment efficiency of harmful substances in the exhaust gas.

[0045] As an alternative, the packing 22 may be provided in a spiral shape.

[0046] Optionally, the filler 22 is made of a plastic material. The plastic material may be polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), etc. The plastic material has good chemical stability, can withstand corrosion from a variety of chemical substances, is suitable for treating exhaust containing corrosive components, and has the advantages of high strength and low cost.

[0047] As an alternative, the filler 22 may be made of ceramic material, which has a strong and durable effect.

[0048] As another alternative, the filler 22 may also be made of iron material.

[0049] Optionally, the screen 211 is made of a steel grating plate. The model of the steel grating plate may be G353 / 30 / 50WFU. The dimensions of the steel grating plate may be: the flat steel height is 35 mm, the flat steel thickness is 3 mm, the flat steel spacing, i.e. the longitudinal bar spacing, is 30 mm, and the horizontal bar spacing is 50 mm. The steel grating plate has the characteristics of high strength and light weight, strong load-bearing capacity, easy installation and transportation, and cost savings; and its surface is hot-dip galvanized, has extremely high corrosion resistance, and has a long service life. The material, thickness and other process parameters of the box body 21 can be determined by the process parameters and scenarios of the exhaust gas treatment system.

[0050] Furthermore, the contours of the opposing side walls of the housing 21 are adapted to the contours of the first inlet and outlet 11 and the second inlet and outlet 12, so that the opposing side walls of the purification device 2 located in the absorption tower 1 can seal the first inlet and outlet 11 and the second inlet and outlet 12. The adaptation of the contours of the opposing side walls of the housing 21 to the first inlet and outlet 11 and the second inlet and outlet 12 not only ensures that the purification device 2 is accurately installed in the absorption tower 1, but also achieves effective sealing of the first inlet and outlet 11 and the second inlet and outlet 12 by the purification device 2, thereby preventing exhaust gas leakage in the absorption tower 1 or outside air from entering the absorption tower 1, thereby improving the sealing performance of the exhaust gas treatment system.

[0051] In order to further enhance the sealing effect of the absorption tower 1, a sealing material may be provided between the housing 21 and the first inlet and outlet 11 and between the second inlet and outlet 12 to prevent exhaust gas leakage. The sealing material may be a sealing gasket.

[0052] To further improve the installation stability between the purification device 2 located in the absorption tower 1 and the absorption tower 1, the housing 21 further includes a first connecting plate 212, which is disposed on the outer side wall of the housing 21. The outer wall of the first inlet and outlet 11 and / or the second inlet and outlet 12 of the absorption tower 1 is provided with a second connecting plate 14, and the first connecting plate 212 and the second connecting plate 14 are detachably connected. The detachable connection between the first connecting plate 212 and the second connecting plate 14 significantly improves the installation stability between the purification device 2 and the absorption tower 1, preventing the purification device 2 from loosening due to vibration or long-term operation.

[0053] Optionally, the first connecting plate 212 and the second connecting plate 14 are connected by bolts.

[0054] like Figure 6 and Figure 7As shown, a plurality of first connecting plates 212 and second connecting plates 14 are provided, and the plurality of first connecting plates 212 are respectively provided on the top and bottom opposite side walls of the box body 21, and are detachably connected to the plurality of second connecting plates 14 in a one-to-one correspondence. Such an arrangement can further improve the firmness and stability of the connection between the purification device 2 located in the absorption tower 1 and the absorption tower 1.

[0055] Furthermore, since a guide rail assembly 13 is provided at the bottom of the box body 21, in order to effectively connect the first connecting plate 212 at the bottom of the box body 21 with the second connecting plate 14 of the absorption tower 1 without affecting the movement of the purification device 2, the second connecting plate 14 of the absorption tower 1 located at the bottom of the first inlet and outlet 11 and / or the second inlet and outlet 12 is away from the first guide rail 131 or the third guide rail 133.

[0056] like Figure 2 and Figure 3 As shown, as an embodiment, the purification device 2 located in the absorption tower 1 is detachably connected to another purification device 2 that is slidably mounted on the guide rail assembly 13 and located outside the absorption tower 1, so that when the purification device 2 located in the absorption tower 1 is slidably removed from the first inlet and outlet 11 or the second inlet and outlet 12, the other purification device 2 that is slidably mounted on the guide rail assembly 13 and located outside the absorption tower 1 can be slidably installed into the absorption tower 1 via the second inlet and outlet 12 or the first inlet and outlet 11. Through the detachable connection of the two purification devices 2, when the purification device 2 located in the absorption tower 1 moves, the other purification device 2 located outside the absorption tower 1 will also move with it, thereby improving the replacement speed of the purification device 2 in the absorption tower 1, and when replacing, there is no need to stop the operation of the absorption tower 1, only the efficiency of the fan of the absorption tower 1 needs to be reduced, thereby improving the exhaust gas treatment efficiency of the exhaust gas treatment system; when the purification device 2 located in the absorption tower 1 is moved out of the absorption tower 1, the connection between the purification device 2 and the new purification device 2 entering the absorption tower 1 is removed, and the replaced purification device 2 can be cleaned or repaired.

[0057] As an alternative embodiment, the purification device 2 located in the absorption tower 1 and another purification device 2 slidably mounted on the guide rail assembly 13 and located outside the absorption tower 1 can be connected by a connecting piece, and the connecting piece is fixed to the two purification devices 2 by welding.

[0058] like Figures 1 to 5 As shown, the outer wall of the absorption tower 1 is provided with an inspection platform 3. The inspection platform 3 provides a stable working platform for the staff, ensures the safety of the staff, enables effective inspection and maintenance of the exhaust gas treatment system, and ensures the stable operation of the exhaust gas treatment system.

[0059] like Figure 4As shown, the maintenance platform 3 includes a platform 31 and a guardrail 32 installed on the platform 31. Workers can perform maintenance on the platform 31, and the provision of the guardrail 32 can provide safety protection for the workers.

[0060] Furthermore, to increase the volume of the absorption tower 1, multiple absorption towers 1 can be connected together to improve the exhaust gas treatment efficiency. Optionally, an extension plate is provided protruding from the outer wall of the absorption tower 1, and two absorption towers 1 are detachably connected by connecting the extension plates, thereby connecting the two absorption towers 1 together. Optionally, the extension plates can be connected using a bolt structure.

[0061] Optionally, the absorption tower 1 further includes an inspection port, so that staff can observe the working conditions inside the absorption tower 1 through the inspection port, or the staff can enter the absorption tower 1 through the inspection port for inspection or maintenance.

[0062] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, the technical solution of the present invention may be subjected to a variety of simple modifications, including combining the various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A tail gas treatment system, characterized in that: include: An absorption tower (1), wherein two opposite side walls of the absorption tower (1) are respectively provided with a first inlet and outlet (11) and a second inlet and outlet (12), and the absorption tower (1) is provided with a guide rail assembly (13), wherein the guide rail assembly (13) extends from one side of the outside of the absorption tower (1) through the first inlet and outlet (11) and the second inlet and outlet (12) to the other side of the outside of the absorption tower (1); as well as A purification device (2), the purification device (2) being slidably disposed on the guide rail assembly (13) and being detachably and sealedly mounted between the first inlet and outlet (11) and the second inlet and outlet (12) of the absorption tower (1), The length of the guide rail assembly (13) is set so that when the purification device (2) located in the absorption tower (1) is slidably removed from the first inlet and outlet (11) or the second inlet and outlet (12), another purification device (2) slidably mounted on the guide rail assembly (13) and located outside the absorption tower (1) can be slidably installed into the absorption tower (1) via the second inlet and outlet (12) or the first inlet and outlet (11).

2. The exhaust gas treatment system according to claim 1, characterized in that: The guide rail assembly (13) comprises: a first guide rail (131), the first guide rail (131) being arranged to extend horizontally outward from the first inlet and outlet (11); a second guide rail (132), the second guide rail (132) being installed between the first inlet and outlet (11) and the second inlet and outlet (12), and being butted against the first guide rail (131); and a third guide rail (133), the third guide rail (133) being arranged to extend horizontally outward from the second inlet and outlet (12) and to butt against the second guide rail (132), Wherein, the lengths of the first guide rail (131) and the third guide rail (133) are set to be greater than or equal to the length of the purification device (2).

3. The exhaust gas treatment system according to claim 1, characterized in that: The guide rail assembly (13) further comprises a limiting member (134), wherein the limiting member (134) is installed at two ends of the guide rail assembly (13) away from the absorption tower (1) and is configured to limit the purification device (2) from detaching from the guide rail assembly (13) along the extension direction of the guide rail assembly (13).

4. The exhaust gas treatment system according to claim 1, characterized in that: One of the guide rail assembly (13) and the purification device (2) is provided with a slider, and the other of the guide rail assembly (13) and the purification device (2) is provided with a slide groove, and the slider and the slide groove are slidably matched.

5. The tail gas treatment system according to any one of claims 1 to 4, characterized in that: The purification device (2) comprises: A box body (21), wherein the bottom of the box body (21) is provided with a screen (211), and the top of the box body (21) is provided in an open shape; and A filler (22), wherein the filler (22) is arranged inside the box body (21).

6. The exhaust gas treatment system according to claim 5, characterized in that: The contour shapes of the opposite side walls of the box body (21) are adapted to the contour shapes of the first inlet and outlet (11) and the second inlet and outlet (12), so that the opposite side walls of the purification device (2) located in the absorption tower (1) can seal the first inlet and outlet (11) and the second inlet and outlet (12).

7. The exhaust gas treatment system according to claim 5, characterized in that: The box body (21) further comprises a first connecting plate (212), the first connecting plate (212) being arranged on an outer side wall of the box body (21), and a second connecting plate (14) being arranged on an outer side wall at the first inlet and outlet (11) and / or the second inlet and outlet (12) of the absorption tower (1), and the first connecting plate (212) and the second connecting plate (14) being detachably connected.

8. The tail gas treatment system according to any one of claims 1 to 4, characterized in that: The purification device (2) located in the absorption tower (1) is detachably connected to another purification device (2) slidably mounted on the guide rail assembly (13) and located outside the absorption tower (1), so that when the purification device (2) located in the absorption tower (1) is slidably removed from the first inlet and outlet (11) or the second inlet and outlet (12), the other purification device (2) slidably mounted on the guide rail assembly (13) and located outside the absorption tower (1) can be slidably installed into the absorption tower (1) via the second inlet and outlet (12) or the first inlet and outlet (11).

9. The tail gas treatment system according to any one of claims 1 to 4, characterized in that: The outer wall of the absorption tower (1) is provided with a maintenance platform (3).

10. The exhaust gas treatment system according to claim 9, characterized in that: The maintenance platform (3) comprises a platform (31) and a guardrail (32) installed on the platform (31).

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