Waste SCR honeycomb catalyst recycling and regenerating system

Abstract

The utility model provides a waste SCR (Selective Catalytic Reduction) honeycomb catalyst recycling and regenerating system, which comprises an ash cleaning cabin, an ash cleaning chamber, a waste SCR honeycomb catalyst recycling and regenerating system and a waste SCR honeycomb catalyst recycling and regenerating system, the ash removal assembly comprises a telescopic driving device, a fixing plate and a plurality of ash removal rod brushes, the fixing plate is arranged at the output end of the telescopic driving device and located in the ash removal cavity, the multiple ash removal rod brushes are arranged on the fixing plate in an array mode, and the multiple ash removal rods are used for stretching into corresponding pore channels of a catalyst to conduct ash removal operation; and the dust collection assembly is connected with the dust removal cabin. According to the waste SCR honeycomb catalyst recycling and regenerating system, the defects that only dust on the surface and the end face of a deactivated catalyst can be removed in an existing dust removal mode, and the effect of removing dust in a catalyst pore channel is poor are overcome, the dust in the catalyst pore channel can be effectively removed, and the service life of the catalyst is prolonged. And the ash removal effect on the catalyst is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst recovery, in particular to a recycling and regeneration system for waste SCR honeycomb catalysts. Background Art

[0002] Selective Catalytic Reduction (SCR) technology is one of the most mature and widely used flue gas denitrification technologies at present, and its key lies in the catalyst. During the operation of the flue gas denitrification system, the catalyst is often deactivated due to reasons such as pore blockage and poisoning after being affected by high-concentration dust and harmful substances in the flue gas for a long time, so that the service life of the catalyst is only 2-3 years.

[0003] After the denitrification catalyst has been operating for a long time in coal-fired factories such as thermal power plants, steel mills and cement plants, a large amount of particulate matter such as coal ash or dust will be deposited on the surface and in the pores. Especially for the catalyst used in the cement plant, the amount of dust in the pores is relatively high, which is caused by the production characteristics of the cement industry. The flue gas in the cement industry has a large dust content, the dust has a certain viscosity, and the dust particle size is relatively small. Ash cleaning is a necessary and key step during the catalyst regeneration process, and the effect of ash cleaning will directly affect the performance of the regenerated catalyst. The existing ash removal methods can only remove the dust on the surface and end face of the deactivated catalyst, and the dust removal effect on the dust in the catalyst pores is relatively poor. Summary of the Utility Model

[0004] The utility model provides a recycling and regeneration system for waste SCR honeycomb catalysts, which is used to solve the defect that the existing ash removal methods can only remove the dust on the surface and end face of the deactivated catalyst, and the dust removal effect on the dust in the catalyst pores is relatively poor.

[0005] The utility model provides a recycling and regeneration system for waste SCR honeycomb catalysts, including: an ash cleaning chamber, in which an ash cleaning cavity is formed; an ash cleaning component, which includes a telescopic driving device, a fixing plate and a plurality of ash cleaning rod brushes. The fixing plate is arranged at the output end of the telescopic driving device and is located in the ash cleaning cavity. The plurality of ash cleaning rod brushes are arranged in an array on the fixing plate, and the plurality of ash cleaning rods are used to extend into the corresponding pores of the catalyst for ash cleaning operations; a dust collection component, which is connected to the ash cleaning chamber.

[0006] According to the recycling and regeneration system for waste SCR honeycomb catalysts provided by the utility model, the ash cleaning rod brush includes a main body part, and bristles are arranged on the outer wall of the main body part. The included angle between the bristles and the outer wall of the main body part is an acute angle, and the bristles extend in a direction away from the fixing plate.

[0007] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, the included angle between the bristles and the outer wall of the main body part is 30° to 60°.

[0008] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, the outer contour of the ash cleaning rod brush matches the pore shape of the catalyst.

[0009] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, it further includes a blowing component, the blowing component includes a high-pressure blower and a blowing plate, and the blowing plate is provided with blowing ports; the blowing plate is arranged on the side wall of the ash cleaning chamber, the high-pressure blower is connected to the blowing ports, and the blowing ports are arranged opposite to the fixing plate.

[0010] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, the blowing plate is provided with a plurality of blowing ports that correspond one by one to the pore channels of the catalyst.

[0011] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, a dust collection chamber is arranged at the top of the ash cleaning chamber, a dust collection cavity is formed in the dust collection chamber, the dust collection chamber is connected to the dust collection component, and the cross-sectional area of the dust collection cavity gradually decreases in the direction away from the ash cleaning cavity.

[0012] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, the dust collection component includes a dust collection pipeline and a dust storage chamber, the inlet end of the dust collection pipeline is connected to the top of the dust collection cavity, and the outlet end of the dust collection pipeline is connected to the dust storage chamber.

[0013] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, a placement table for placing the catalyst is arranged in the ash cleaning cavity.

[0014] According to the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, a cabin door is arranged on the side wall of the ash cleaning chamber, and the cabin door faces the placement table.

[0015] The waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, by setting a dust cleaning component, when the catalyst (with intact structure and shape) is subjected to dust cleaning treatment, it is placed in the dust cleaning chamber, the telescopic driving device and the dust collection component are started, and under the driving action of the output end of the telescopic driving device, multiple dust cleaning rod brushes on the fixing plate are driven to reciprocate, so as to respectively perform dust cleaning operations on the corresponding pores of the catalyst, and the dust collection component can collect and process the dust diffused into the dust cleaning chamber by forming a negative pressure. The waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model solves the defect that the existing dust removal method can only remove the dust on the surface and end face of the deactivated catalyst, and has a poor dust removal effect on the dust in the catalyst pores, and can effectively remove the dust in the catalyst pores, greatly improving the dust cleaning effect on the catalyst.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the waste SCR honeycomb catalyst recovery and regeneration system provided by the embodiment of the present utility model.

[0019] Figure 2 It is one of the schematic diagrams of the dust cleaning component in the waste SCR honeycomb catalyst recovery and regeneration system provided by the embodiment of the present utility model.

[0020] Figure 3 It is the second schematic diagram of the dust cleaning component in the waste SCR honeycomb catalyst recovery and regeneration system provided by the embodiment of the present utility model.

[0021] Reference Signs:

[0022] 10, dust cleaning chamber; 110, hatch door; 20, dust cleaning component; 210, telescopic driving device; 220, fixing plate; 230, dust cleaning rod brush; 231, main body part; 232, bristles; 30, dust collection component; 310, dust collection pipeline; 320, dust storage chamber; 40, injection component; 410, high-pressure fan; 420, air supply pipeline; 430, injection plate; 50, dust collection chamber; 60, placement table; 70, bracket. Detailed Embodiments

[0023] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model 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 thus should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0026] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0028] The following combines Figures 1 to 3 to describe the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model.

[0029] See Figures 1 to 3 As shown, the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model includes: a dust cleaning chamber 10, a dust cleaning component 20, and a dust collection component 30.

[0030] Among them, a dust cleaning cavity is formed in the dust cleaning chamber 10; the dust cleaning component 20 includes a telescopic driving device 210, a fixing plate 220, and a plurality of dust cleaning rod brushes 230. The fixing plate 220 is arranged at the output end of the telescopic driving device 210 and is located in the dust cleaning cavity. The plurality of dust cleaning rod brushes 230 are arranged in an array on the fixing plate 220, and the plurality of dust cleaning rods are used to extend into the corresponding pores of the catalyst for dust cleaning operations; the dust collection component 30 is connected to the dust cleaning chamber 10.

[0031] For the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model, by setting the dust cleaning component 20, when the catalyst (with complete structure and shape) is subjected to dust cleaning treatment, it is placed in the dust cleaning cavity, the telescopic driving device 210 and the dust collection component 30 are started. Under the driving action of the output end of the telescopic driving device 210, the plurality of dust cleaning rod brushes 230 on the fixing plate 220 are driven to reciprocate, so as to perform dust cleaning operations on the corresponding pores of the catalyst respectively. The dust collection component 30 can collect and process the dust diffused into the dust cleaning cavity by forming a negative pressure. The waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model solves the defect that the existing dust removal method can only remove the dust on the surface and end face of the deactivated catalyst, and has a poor dust removal effect on the dust in the catalyst pores, and can effectively remove the dust in the catalyst pores, greatly improving the dust cleaning effect on the catalyst.

[0032] See Figure 2 and Figure 3As shown, according to some embodiments of the present utility model, the dust cleaning rod brush 230 includes a main body portion 231. Brush hairs 232 are provided on the outer wall of the main body portion 231. The angle between the brush hairs 232 and the outer wall of the main body portion 231 is an acute angle, and the brush hairs 232 extend in a direction away from the fixing plate 220. By configuring the angle between the brush hairs 232 and the outer wall of the main body portion 231 as an acute angle, when the dust cleaning rod brush 230 moves forward in the catalyst pore channels (at this time, the output end of the telescopic driving device 210 extends outwards), it can effectively sweep away the dust adhering to the inner wall of the catalyst pore channels, improving the cleaning effect.

[0033] Specifically, in this embodiment, the main body portion 231 is a cylindrical rod-shaped structure made of steel, and its diameter is smaller than the inner diameter of the catalyst pore channels. The brush hairs 232 are brush hairs 232 with medium hardness, which can deform during the friction with the catalyst pore channels and can effectively clean the dust on the inner wall.

[0034] A bracket 70 is provided at the bottom of the dust cleaning chamber 10, and the dust cleaning chamber 10 is supported and fixed by the bracket 70.

[0035] According to some embodiments of the present utility model, the angle between the brush hairs 232 and the outer wall of the main body portion 231 is 30° to 60°. By setting the angle between the brush hairs 232 and the outer wall of the main body portion 231 between 30° and 60°, the brush hairs 232 can deform appropriately during the friction with the catalyst pore channels, thereby improving the cleaning effect on the dust on the inner wall of the catalyst pore channels.

[0036] According to some embodiments of the present utility model, the outer contour of the dust cleaning rod brush 230 matches the shape of the pore channels of the catalyst. By configuring the outer contour of the dust cleaning rod brush 230 to match the shape of the pore channels of the catalyst, the end portions of the brush hairs 232 can be more closely attached to the inner wall of the catalyst pore channels, thereby improving the cleaning effect.

[0037] As an example, the pore channels of existing catalysts are usually square pore channels, and the outer contour of the dust cleaning rod brush 230 can be configured as a square matching the square pore channels.

[0038] See Figure 1 As shown, according to some embodiments of the utility model, the waste SCR honeycomb catalyst recycling and regeneration system further includes a blowing assembly 40. The blowing assembly 40 includes a high-pressure blower 410 and a blowing plate 430. Blowing ports are provided on the blowing plate 430; the blowing plate 430 is provided on the side wall of the dust cleaning chamber 10. The high-pressure blower 410 is connected to the blowing ports, and the blowing ports are arranged opposite to the fixing plate 220. By providing the blowing assembly 40, when the dust cleaning rod brush 230 performs dust cleaning treatment on the catalyst pore channels, the dust remaining in the catalyst pore channels can be blown outwards through the blowing assembly 40, preventing the dust from depositing on the inner wall of the catalyst pore channels again.

[0039] Specifically, the air outlet of the high-pressure blower 410 is communicated with the injection port through the air supply pipeline 420. The high-pressure blower 410 can be selectively turned on for injection according to the amount of dust in the catalyst channels, and the operating frequency of the blower can be adjusted according to the amount of dust in the catalyst channels to control the magnitude of the high-pressure gas pressure generated by the injection.

[0040] Further, referring to Figure 1 As shown, according to some embodiments of the utility model, the injection plate 430 is provided with a plurality of injection ports corresponding one-to-one to the channels of the catalyst. By providing a plurality of injection ports corresponding one-to-one to the channels of the catalyst on the injection plate 430, during the dust cleaning operation, high-pressure gas can be introduced into different catalyst channels through the plurality of injection ports respectively, thereby improving the dust cleaning effect.

[0041] Specifically, a nozzle is connected to each injection port, and the nozzle can extend into the channel of the catalyst so as to introduce high-pressure gas into the channel of the catalyst.

[0042] Referring to Figure 1 As shown, according to some embodiments of the utility model, a dust collection chamber 50 is provided at the top of the dust cleaning chamber 10. A dust collection cavity is formed in the dust collection chamber 50. The dust collection chamber 50 is connected to the dust collection assembly 30, and the cross-sectional area of the dust collection cavity gradually decreases in the direction away from the dust cleaning cavity. By providing the dust collection chamber 50 at the top of the dust cleaning chamber 10, the dust diffused in the dust cleaning chamber 10 can be collected and converged, and enter the dust collection assembly 30 under the action of negative pressure.

[0043] Referring to Figure 1 As shown, according to some embodiments of the utility model, the dust collection assembly 30 includes a dust collection pipeline 310 and a dust storage chamber 320. The inlet end of the dust collection pipeline 310 is connected to the top of the dust collection cavity, and the outlet end of the dust collection pipeline 310 is connected to the dust storage chamber 320. During the dust cleaning process, the dust enters the dust collection pipeline 310 through the top of the dust collection cavity and finally enters the dust storage chamber 320 for temporary storage.

[0044] Specifically, a valve plate can be provided on the dust collection pipe to control the opening and closing of the dust collection pipe.

[0045] Referring to Figure 1 As shown, according to some embodiments of the utility model, a placement table 60 for placing the catalyst is provided in the dust cleaning cavity, and the placement table 60 remains fixed. By providing the placement table 60 in the dust cleaning cavity, during the dust cleaning process, the catalyst can be placed on the placement table 60 so that the catalyst is located at a set position between the dust cleaning assembly 20 and the injection assembly 40, improving the convenience of the system.

[0046] Referring to Figure 1As shown, according to some embodiments of the utility model, a cabin door 110 is provided on the side wall of the dust cleaning chamber 10, and the cabin door 110 faces the placement table 60. By providing the cabin door 110 on the side wall of the dust cleaning chamber 10 and making the cabin door 110 face the placement table 60, before the dust cleaning process, the cabin door 110 can be opened to place the catalyst to be cleaned on the placement table 60, and after the dust cleaning process, the catalyst can be taken out through the cabin door 110. In addition, after the dust cleaning chamber 10 has been used for a certain period of time, the cabin door 110 can be opened to clean its interior to prevent dust accumulation.

[0047] The following will specifically describe the dust cleaning process of the waste SCR honeycomb catalyst recovery and regeneration system provided by the present utility model. Please refer to Figures 1 to 3 .

[0048] Manually disassemble the recovered waste SCR catalyst and select the catalyst with a complete structure and shape.

[0049] Open the cabin door 110 of the dust cleaning chamber 10, place the catalyst at a set position on the placement table 60 for fixation, and align the multiple dust cleaning rod brushes 230 on the fixing plate 220 with the pores of the catalyst. At this time, the output end of the telescopic driving device 210 is in the retracted state, and the fixing plate 220 is in the initial position. Close the cabin door 110.

[0050] Open the dust collection assembly 30 and start the telescopic driving device 210 and the high-pressure blower 410. The output end of the telescopic driving device 210 drives the fixing plate 220 and the multiple cleaning rod brushes arranged in an array on the fixing plate 220 to move towards the catalyst. At this time, the output end of the telescopic driving device 210 runs at a constant speed, and the cleaning rod brushes can make the dust attached to the inner wall of the pores fall off. The running speed of the output end of the telescopic driving device 210 can be adjusted up or down by turning the knob. The high-pressure air generated by the high-pressure blower 410 is transported through the air supply pipeline 420 to the blowing plate 430, and enters the corresponding catalyst pores through each sub-blowing port for purging, so that the dust enters the dust cleaning chamber. The dust diffused in the dust cleaning chamber converges in the dust collection chamber under the action of negative pressure and finally enters the dust storage chamber 320 through the dust collection pipeline 310.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A waste SCR honeycomb catalyst recovery and regeneration system, characterized in that: include: A ash cleaning cabin, wherein a ash cleaning cavity is formed in the ash cleaning cabin; A dust cleaning component, the dust cleaning component comprises a telescopic driving device, a fixed plate and a plurality of dust cleaning rod brushes, the fixed plate is arranged at the output end of the telescopic driving device and is located in the dust cleaning cavity, a plurality of dust cleaning rod brush arrays are arranged on the fixed plate, and a plurality of dust cleaning rods are used to extend into corresponding channels of the catalyst for dust cleaning operations; A dust collecting component is connected to the dust cleaning cabin.

2. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 1 is characterized in that: The cleaning rod brush comprises a main body, an outer wall of which is provided with bristles, an acute angle is formed between the bristles and the outer wall of the main body, and the bristles extend in a direction away from the fixing plate.

3. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 2 is characterized in that: The included angle between the bristles and the outer wall of the main body is 30° to 60°.

4. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 1 is characterized in that: The outer contour of the cleaning rod brush matches the pore shape of the catalyst.

5. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 1 is characterized in that: It also includes a blowing assembly, which includes a high-pressure fan and a blowing plate, and the blowing plate is provided with a blowing port; The blowing plate is arranged on the side wall of the dust cleaning chamber, the high-pressure fan is connected to the blowing port, and the blowing port is arranged opposite to the fixing plate.

6. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 5 is characterized in that: The blowing plate is provided with a plurality of blowing ports corresponding one to one with the pores of the catalyst.

7. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 1 is characterized in that: A dust collecting chamber is provided on the top of the dust cleaning chamber, a dust collecting cavity is formed in the dust collecting chamber, the dust collecting chamber is connected to the dust collecting assembly, and the cross-sectional area of ​​the dust collecting cavity gradually decreases in the direction away from the dust cleaning cavity.

8. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 7 is characterized in that: The dust collecting assembly comprises a dust collecting pipeline and a dust storage chamber, the inlet end of the dust collecting pipeline is connected to the top of the dust collecting cavity, and the outlet end of the dust collecting pipeline is connected to the dust storage chamber.

9. The waste SCR honeycomb catalyst recovery and regeneration system according to any one of claims 1 to 8, characterized in that: A placement table for placing the catalyst is arranged in the cleaning chamber.

10. The waste SCR honeycomb catalyst recovery and regeneration system according to claim 9, characterized in that: The side wall of the dust cleaning cabin is provided with a cabin door, and the cabin door faces the placement platform.

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