Adsorber for waste gas desorption treatment

Abstract

The present invention relates to an adsorber for waste gas desorption treatment, the adsorber for waste gas desorption treatment comprises a shell and a filter cartridge, the shell is provided with an air inlet and an air outlet; the filter cartridge is detachably connected to the shell, the filter cartridge can rotate in the shell, the filter cartridge comprises an inner cylinder and an outer cylinder, an annular space filled with adsorption medium is formed between the inner cylinder and the outer cylinder, an air inlet space connected to the air inlet is formed between the shell and the outer cylinder, and an air outlet space connected to the air outlet is surrounded by the inner side of the inner cylinder. The filter cartridge is configured to be detachable, which is convenient for replacing activated carbon; the filter cartridge can rotate in the shell, which is conducive to uniformly utilizing activated carbon to filter waste gas, and effectively avoiding the occurrence of short-flow phenomenon of compacted and compacted gas; desorption and adsorption share the air inlet and air outlet, that is, they can share a set of air inlet and outlet pipelines, the equipment has high integration and small footprint.

Description

Technical Field

[0001] The invention relates to the field of organic waste gas treatment, and in particular to an adsorber for waste gas desorption treatment. Background Art

[0002] As we all know, the adsorption concentration + catalytic combustion VOC treatment process has been widely used in the treatment of low-concentration, high-volume organic waste gas due to its simple technology and low operating costs. At present, its adsorption concentration unit mainly uses activated carbon adsorption.

[0003] There are three main forms of activated carbon used for adsorption: activated carbon granules, honeycomb activated carbon, and activated carbon fiber. Although honeycomb activated carbon and activated carbon fiber have many advantages, they are still not widely used at present, mainly because of their high prices. For the same adsorption performance, the price of honeycomb activated carbon is generally 2 to 3 times that of granular activated carbon, while the price of activated carbon fiber is generally 7 to 10 times that of granular activated carbon.

[0004] There are two types of absorbers: drawer type and cylinder type. Due to its structural limitations, the drawer type activated carbon absorber occupies a large space and is generally used in conditions with low air volume. If the air volume exceeds 10,000 m 3 / h, to ensure sufficient filling volume, the volume will be too large, the economy will be greatly reduced, and in this case, short-flow is likely to occur, resulting in uneven saturation of the activated carbon layer and reduced absorption efficiency. Later, a vertical cylindrical activated carbon adsorption tower appeared. It draws on the structural form of the traditional packed tower and adopts a structure in which multiple layers of activated carbon fillers are connected in series. Although it partially solves the problem of large floor space, it has the disadvantages of large resistance loss and difficult replacement of activated carbon particles. At the same time, a cylindrical vertical adsorber structure adopts a cylindrical filter layer with an annular cross-section. Although this structural form partially solves the problem of large resistance loss, when the filling volume is large, the activated carbon particles will accumulate in the filter cylinder, which is easy to cause compaction of the bottom activated carbon, and will also cause uneven saturation of the activated carbon adsorption layer. It also has the disadvantage of not being easy to replace the activated carbon.

[0005] The adsorption / desorption unit of the adsorption concentration + catalytic combustion VOC treatment device adopts several (generally 3 to 6) activated carbon adsorption boxes in parallel to meet the needs of online desorption. In this case, the above-mentioned structure generally adopts an independent desorption pipeline, and the desorption air pipeline is parallel to the adsorption air pipeline, which makes the process structure more complicated and inconvenient to operate and maintain. In addition, the structure of several parallel units makes the disadvantages of the above-mentioned structure larger in floor space and higher in cost more prominent. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the present invention provides an adsorber for waste gas desorption treatment, so as to at least solve or alleviate one or more technical problems in the prior art, or at least provide a beneficial choice.

[0007] An adsorber for waste gas desorption treatment, comprising a shell and a filter cartridge, wherein the shell is provided with an air inlet and an air outlet; the filter cartridge is detachably connected to the shell, and the filter cartridge can rotate within the shell, the filter cartridge comprises an inner cylinder and an outer cylinder, an annular space filled with an adsorption medium is formed between the inner cylinder and the outer cylinder, an air inlet space connected to the air inlet is formed between the shell and the outer cylinder, and an air outlet space connected to the air outlet is surrounded by the inner side of the inner cylinder. When in use, a blower is connected to the air inlet or an exhaust fan is connected to the air outlet, and the latter is safer because of its low pressure. The filter cartridge may adopt a grid cylinder structure, or may adopt other structures with a filtering effect such as a hole-type cylinder. The adsorption medium may adopt adsorption media such as activated particles and honeycomb activated carbon.

[0008] Optionally, the air inlet is arranged on the side wall of the shell, and the air inlet direction is arranged along the tangent direction of the filter cartridge. With this arrangement, the exhaust gas can be filtered through the activated carbon along a spiral trajectory, the exhaust gas contacts the activated carbon more evenly, and the exhaust gas treatment efficiency is high.

[0009] The working principle is as follows: ① Under adsorption conditions, the exhaust gas enters the outer shell tangentially from the air inlet. Due to the existence of the inlet and outlet pressure difference, the exhaust gas fills the entire air inlet space along the spiral line and evenly passes through the activated carbon adsorption layer filled in the annular space; the exhaust gas treated by adsorption enters the inner cylinder, flows axially to the air outlet for discharge, and enters the exhaust fan to meet the emission standards. ② Under desorption conditions, the high-temperature desorption wind enters the outer shell tangentially from the air inlet, and also evenly passes through the activated carbon adsorption layer filled in the annular space; the desorption wind blows off the VOC components enriched in the activated carbon layer, enters the inner cylinder, flows axially to the air outlet for discharge, and is sent to the catalytic combustion chamber by the desorption fan. The above two treatment processes share the air outlet and the air inlet, that is, they can share the air inlet and outlet pipes. This arrangement simplifies the treatment process, and the equipment is highly integrated, reducing the floor space.

[0010] Among them, the filter cartridge adopts a detachable connection method, which makes it convenient to replace the activated carbon by disassembling the filter cartridge after using the activated carbon for a period of time.

[0011] The filter cartridge can be rotated continuously or intermittently, both of which can achieve relatively uniform utilization of activated carbon. During adsorption / desorption, the filter cartridge can be rotated at a certain angle according to the operating conditions to prevent compaction of activated carbon and short-flow of the air duct. The filter cartridge can be rotated automatically or manually; one of the automatic rotation methods is as follows: for example, an annular gear ring is set in the housing, and the filter cartridge is sleeved in the gear ring. The filter cartridge and the gear ring cannot rotate relative to each other but can be relatively withdrawn. The gear ring is meshed with the drive motor gear to realize the rotation of the filter cartridge.

[0012] Optionally, the adsorber is horizontal, and such a configuration can more effectively avoid the occurrence of concentrated compression of activated carbon.

[0013] Optionally, a plurality of partitions for dividing the annular space are provided between the inner cylinder and the outer cylinder. Such an arrangement can effectively disperse the adsorption medium and avoid the concentration of the adsorption medium.

[0014] Optionally, the filter cartridge has a first end and a second end along its axial direction, the first end being an outlet end connected to the outlet, the second end being a closed end fixedly provided with a removable inner end cap, the air inlet being provided on the side wall of the shell near the second end, and a removable support end cap being fixedly provided on the end side of the shell near the second end. When replacing the activated carbon, the support end cap is removed, the filter cartridge is pulled out, and then replaced. Compared with other removal methods, the one-side extraction method is faster and more convenient, saving time for replacing the activated carbon.

[0015] Optionally, an inner shaft is provided in the outer shell, a sleeve is fixed in the filter cartridge and is sleeved with the inner shaft, and the filter cartridge can be withdrawn from the end of the inner shaft away from the air outlet. When the inner shaft and the sleeve are non-rotatably connected, the inner shaft can be driven to rotate the filter cartridge; when the inner shaft and the sleeve are rotatably connected, the filter cartridge itself can be driven to rotate.

[0016] Optionally, a driven part is fixedly provided on the outside of the inner end cover, and the driven part is movably extended out of the supporting end cover and connected to a power-assisting handle. With such a configuration, the filter cartridge can be rotated at a certain angle when needed. It should be noted that the abutment connection between the filter cartridge and the housing is sufficient to ensure that the filter cartridge will not flip back after rotating at a certain angle, and the intake air volume is not sufficient to drive the filter cartridge to rotate.

[0017] Optionally, a rotation angle scale is provided on the outer side of the support end cover at the periphery of the driven part, and a pointer matching the rotation angle scale is provided on the power assist handle so as to more accurately control the rotation angle of the filter cartridge.

[0018] Optionally, the end of the inner shaft extends to be no shorter than the inner side of the inner end cover. Such an arrangement can better support the filter cartridge temperature in the outer shell.

[0019] Optionally, a supporting base is provided at the bottom of the shell.

[0020] Optionally, a plurality of support bodies are provided between the inner cylinder and the shaft sleeve to ensure the strength of the inner cylinder.

[0021] Optionally, the adsorber also includes a safety interlock assembly, which includes a controller and a temperature sensor and a spray device respectively connected to the controller. The temperature sensor is arranged on the outer shell to measure the temperature inside the outer shell. The spray device is arranged above the adsorber to operate when the temperature sensor measures a temperature exceeding an upper limit so as to achieve a cooling effect.

[0022] The present invention adopts the above structure, and has the advantages of:

[0023] 1. In this application, the filter cartridge is configured to be detachable, which is convenient for replacing activated carbon; the filter cartridge can rotate in the outer shell, which is conducive to uniformly utilizing activated carbon to filter exhaust gas and effectively avoiding the occurrence of compacted gas short-flow phenomenon; desorption and adsorption share a set of inlet and outlet pipelines, and the equipment is highly integrated and occupies a small area.

[0024] 2. In this application, the air intake direction is set along the tangent direction of the filter cartridge, realizing spiral air intake filtration purification and more uniform utilization of activated carbon.

[0025] 3. In the present application, the filter cartridge adopts a pull-out structure in which an inner shaft and a shaft sleeve cooperate, so that the activated carbon in the filter cartridge can be replaced relatively quickly.

[0026] 4. In this application, the setting of the power handle and the rotation angle scale can better control the rotation angle of the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an adsorber in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of radial cross-sectional structure;

[0029] Figure 3 An exploded view of an adsorber in one embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the axial cross-sectional structure of an adsorber in one embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the structure of an adsorber in one embodiment of the present invention.

[0032] 1. Shell, 2. Filter cartridge, 3. Adsorption medium;

[0033] 11. air inlet, 12. air outlet, 13. support end cover, 131. rotation angle scale, 14. inner shaft, 15. support base;

[0034] 21. Inner cylinder, 22. Outer cylinder, 23. Inner end cover, 24. Bushing, 25. Driven part, 26. Power assist handle, 261. Pointing mark, 27. Support body. DETAILED DESCRIPTION

[0035] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0037] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0040] like Figure 1-2 As shown, in this embodiment, the adsorber for waste gas desorption treatment includes a shell 1 and a filter cartridge 2, the shell 1 is provided with an air inlet 11 and an air outlet 12; the filter cartridge 2 is detachably connected to the shell 1, and the filter cartridge 2 can rotate in the shell 1, the filter cartridge 2 includes an inner cylinder 21 and an outer cylinder 22 that are sleeved and connected, and an annular space filled with an adsorption medium 3 is formed between the inner cylinder 21 and the outer cylinder 22, and the adsorption medium 3 can be an adsorbent material such as activated carbon, and an air inlet space connected to the air inlet is formed between the shell 1 and the outer cylinder 22, and the inner side of the inner cylinder 21 is surrounded by an air outlet space connected to the air outlet 12. It can be understood that the ends of the inner cylinder and the outer cylinder close to the air outlet are sealed at the position corresponding to the annular space, and specifically, an annular end plate can be used for sealing, so as to ensure that the waste gas can smoothly enter the air outlet space through the adsorption medium. When in use, a blower is connected to the air inlet 11 or an exhaust fan is connected to the air outlet. The latter is safer because of its low pressure.

[0041] It can be understood that the air inlet 11 is arranged on the side wall of the outer shell 1, and the air inlet direction is arranged along the tangent direction of the filter cartridge 2. Such an arrangement allows the exhaust gas to be filtered through the activated carbon along a spiral trajectory, the exhaust gas contacts the activated carbon more evenly, and the exhaust gas treatment efficiency is high.

[0042] Working principle: ① Under adsorption conditions, the exhaust gas enters the outer shell 1 tangentially from the air inlet 11. Due to the existence of the inlet and outlet pressure difference, the exhaust gas fills the entire air inlet space along the spiral line and evenly passes through the activated carbon adsorption layer filled in the annular space; the exhaust gas treated by adsorption enters the inner cylinder 21, flows axially to the air outlet 12 for discharge, and enters the exhaust fan to meet the emission standards. ② Under desorption conditions, the high-temperature desorption wind enters the outer shell 1 tangentially from the air inlet 11, and also evenly passes through the activated carbon adsorption layer filled in the annular space; the desorption wind blows off the VOC components enriched in the activated carbon layer, enters the inner cylinder 21, flows axially to the air outlet for discharge, and is sent to the catalytic combustion chamber by the desorption fan. The above two treatment processes share the air outlet and the air inlet, that is, they share the air inlet and outlet pipes. Such a setting simplifies the treatment process, has a high degree of equipment integration, and reduces the floor space.

[0043] Among them, the filter cartridge 2 adopts a detachable connection method, which is convenient for replacing the activated carbon by disassembling the filter cartridge 2 after using it for a period of time, and the activated carbon is relatively convenient to replace. The filter cartridge 2 can be rotated continuously or intermittently, both of which can achieve more uniform utilization of the activated carbon. The rotation facilitates the dispersion of the activated carbon and effectively avoids the concentrated compression of the activated carbon. The filter cartridge 2 can be rotated automatically or manually; one of the automatic rotation methods is as follows: for example, an annular gear ring is set in the outer shell, and the filter cartridge is sleeved in the gear ring. The filter cartridge and the gear ring cannot rotate relative to each other but can be relatively withdrawn, and the gear ring is meshed with the drive motor gear to realize the rotation of the filter cartridge.

[0044] like Figure 3 As shown, in one of the embodiments, the adsorber is arranged in a horizontal position. Such an arrangement can more effectively avoid the occurrence of concentrated compression of activated carbon.

[0045] like Figure 3 As shown, in one embodiment, a plurality of partitions are provided between the inner cylinder and the outer cylinder to divide the annular space. If the adsorber is arranged vertically, it is better to arrange the partitions axially, and if the adsorber is arranged horizontally, it is better to arrange them circumferentially. Such an arrangement can effectively disperse the adsorption medium and avoid the concentration of the adsorption medium.

[0046] like Figure 3 As shown, in one embodiment, the filter cartridge 2 has a first end and a second end along its axial direction, the first end is an outlet end connected to the outlet port 11, the second end is a closed end fixedly provided with a removable inner end cap 23, the inlet port 11 is provided on the side wall of the housing 1 near the second end, and a removable support end cap 13 is fixedly provided on the end side of the housing 1 near the second end. When in use, the support end cap 13 is opened to extract the filter cartridge 2; when replacing the activated carbon, the inner end cap 23 is opened to replace the new activated carbon. Compared with other removal methods, the one-side extraction method is faster and more convenient, saving time for replacing the activated carbon.

[0047] like Figure 3-4 As shown, in one embodiment, the filter cartridge 2 can adopt the following rotating structure. Specifically, an inner shaft 14 is provided in the outer shell 1. Specifically, the inner shaft 14 can be fixed to the outer shell by a support body fixed at the outlet. A sleeve 24 that is sleeved with the inner shaft 14 is fixed in the filter cartridge 2. The filter cartridge 2 can be pulled out from the end of the inner shaft 14 away from the air outlet. When the inner shaft 14 and the sleeve 24 are non-rotatably connected, the inner shaft 14 can be driven to rotate the filter cartridge; when the inner shaft 14 and the sleeve 24 are rotatably connected, the filter cartridge 2 itself can be driven to achieve its own rotation.

[0048] like Figure 3-5 As shown, in one of the embodiments, the filter cartridge 2 adopts a manually driven structure. Specifically, a driven portion 25 is fixedly provided on the outside of the inner end cover 23. The driven portion 25 is movably extended out of the support end cover 13 and connected to a power-assisting handle 26. The power-assisting handle and the driven portion 25 are detachable. With such an arrangement, the filter cartridge 2 can be rotated to a certain angle when necessary. It should be noted that the abutting connection between the filter cartridge 2 and the outer shell 1 is sufficient to ensure that the filter cartridge 2 will not flip back after rotating to a certain angle, and the intake air volume is not sufficient to drive the filter cartridge 2 to rotate. A sealing sheet is provided at the abutting contact point between the outlet end of the filter cartridge and the outer shell to prevent the exhaust gas from flowing directly from here to the outlet without passing through the adsorption medium.

[0049] like Figure 5 As shown, in one of the embodiments, in order to better control the rotation angle of the filter cartridge 2, a rotation angle scale 131 is provided on the outer side of the support end cover 13 on the periphery of the driven portion 25, and a pointer 261 cooperating with the rotation angle scale 131 is provided on the power assist handle 26 to more accurately control the rotation angle of the filter cartridge 2.

[0050] like Figure 4 As shown, in one embodiment, the end of the inner shaft 14 extends to be no shorter than the inner side of the inner end cover 23 . Such a configuration can make the filter cartridge 2 more stably supported in the housing 1 .

[0051] like Figure 3-5 As shown, in one embodiment, a support base 15 is provided at the bottom of the outer shell 1 to support the entire adsorber; a plurality of support bodies 27 are provided between the inner cylinder 21 and the shaft sleeve 24 to better ensure the overall strength of the filter cylinder 2.

[0052] The above specific implementations cannot be used as limitations on the scope of protection of the present invention. For those skilled in the art, any replacement, improvement or change made to the implementations of the present invention falls within the scope of protection of the present invention. The parts not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. An adsorber for waste gas desorption treatment, characterized in that: include: A shell, wherein an air inlet and an air outlet are provided on the shell, and the air inlet and the air outlet are shared by adsorption and desorption; A filter cartridge, the filter cartridge is detachably connected to the shell, the filter cartridge can rotate in the shell, the filter cartridge comprises an inner cylinder and an outer cylinder, an annular space filled with an adsorption medium is formed between the inner cylinder and the outer cylinder, an air inlet space connected to the air inlet is formed between the shell and the outer cylinder, and an air outlet space connected to the air outlet is formed inside the inner cylinder; The filter cartridge has a first end and a second end along its axial direction, the first end being an outlet end connected to the air outlet, the second end being a closed end fixedly provided with a detachable inner end cover, the air inlet being provided on the side wall of the shell near the second end, and a detachable supporting end cover being fixedly provided on the end side of the shell near the second end; The filter cartridge is provided with an inner shaft, and a shaft sleeve which is sleeved with the inner shaft is fixedly provided in the filter cartridge, and the filter cartridge can be withdrawn from the end of the inner shaft which is away from the air outlet; A safety interlock assembly comprises a controller and a temperature sensor and a spray device respectively connected to the controller, wherein the temperature sensor is arranged on the housing, and the spray device is arranged above the adsorber.

2. The adsorber for waste gas desorption treatment according to claim 1, characterized in that: The adsorber is horizontal.

3. The adsorber for waste gas desorption treatment according to claim 1 or 2, characterized in that: A plurality of partitions for dividing the annular space are arranged between the inner cylinder and the outer cylinder.

4. The adsorber for waste gas desorption treatment according to claim 1, characterized in that: The air inlet is arranged on the side wall of the shell, and the air inlet direction is arranged along the tangent direction of the filter cartridge.

5. The adsorber for waste gas desorption treatment according to claim 1, characterized in that: A driven part is fixedly arranged outside the inner end cover, and the driven part is movably extended out of the supporting end cover and connected with a power-assisting handle.

6. The adsorber for waste gas desorption treatment according to claim 1, characterized in that: A rotation angle scale is arranged on the outer side of the support end cover at the outer periphery of the driven part, and a direction mark cooperating with the rotation angle scale is arranged on the power assist handle.

7. The adsorber for waste gas desorption treatment according to claim 6, characterized in that: The end of the inner shaft extends to be no shorter than the inner side of the inner end cover.

8. The adsorber for waste gas desorption treatment according to claim 1, characterized in that: A supporting base is provided at the bottom of the housing; A plurality of supporting bodies are arranged between the inner cylinder and the shaft sleeve.

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