Refuse incinerator ash removal and catalyst deactivation prevention mechanism and denitration device

Abstract

The invention relates to the technical field of flue gas purification, in particular to an ash removal and catalyst deactivation prevention mechanism for a garbage incinerator and a denitration device.The deactivation mechanism comprises a filter cartridge, a partition plate is arranged in the filter cartridge, a plurality of filter mechanisms are distributed on the partition plate, each filter mechanism comprises an outer bag, an inner bag and a cleaning assembly, an isolation assembly is arranged on the inner bag, and the outer bag is provided with a filter element; the isolation assembly comprises a protection cover and an isolation plate, and when the outer bag shrinks, the isolation plate can move to the top end of the inner bag to be in sealing fit with an opening in the top end of the inner bag; after the outer bag is contracted and the inner bag is isolated, pulse cleaning can be performed on the outer bag trustingly, so that the dust cleaning thoroughness of the outer bag is improved by virtue of the powerful cleaning capability of pulses, pulse airflow is prevented from directly acting on a catalyst in the inner bag, and the risk of damaging the catalyst by pulse dust cleaning is thoroughly eliminated; the catalyst is effectively prevented from falling off, powdering or activity reduction due to airflow impact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas purification, in particular to a waste incinerator dust removal and catalyst deactivation prevention mechanism and a denitration device. BACKGROUND

[0002] During the waste incineration process, flue gas containing a large amount of dust and nitrogen oxides is generated, and if it is directly discharged, it will cause serious air pollution. In the prior art, the bag filter of the waste incinerator usually adopts a pulse dust removal method. For example, a waste incinerator dust and nitrogen integrated removal system and method disclosed in Chinese Patent No. CN118022508B intercepts large particle dust in the flue gas through an outer bag, loads a denitration catalyst on the surface of an inner bag to remove nitrogen oxides, and relies on a pulse blowback device to input compressed gas to the blowback gap between the inner and outer bags to make the outer bag vibrate to remove the accumulated dust.

[0003] Such existing systems still have many problems to be solved in actual long-term operation: first, the core of pulse dust removal relies on high-pressure airflow to impact the outer bag, but the blowback gap between the inner and outer bags cannot completely isolate the airflow, and part of the pulse airflow will inevitably act on the surface of the inner bag, causing the catalyst particles loaded on the inner bag to fall off and pulverize due to airflow impact, directly causing the catalyst activity to decrease or even deactivate, which requires frequent shutdown for catalyst replenishment or replacement, increasing maintenance costs and affecting the continuous operation efficiency of the system; second, the outer bag dust removal only relies on the shaking action driven by the airflow, and the cleaning effect is limited for the dust accumulated for a long time and with strong adhesion. SUMMARY

[0004] To solve the above problems, a waste incinerator dust removal and catalyst deactivation prevention mechanism and a denitration device are provided. After the outer bag is contracted and the inner bag is isolated, the outer bag can be safely pulse cleaned, which not only enhances the thoroughness of outer bag dust removal by the strong cleaning ability of the pulse, but also avoids the direct action of pulse airflow on the inner bag catalyst, completely eliminating the risk of catalyst damage by pulse dust removal, and effectively preventing the catalyst from falling off, pulverizing or decreasing in activity due to airflow impact.

[0005] To solve the prior art problems, the application provides a waste incinerator ash removal catalyst deactivation prevention mechanism, which comprises a filter cartridge, a partition plate is arranged in the filter cartridge, a plurality of filter mechanisms are arranged on the partition plate, each filter mechanism comprises an outer bag and an inner bag, the inner bag is fixedly connected with the partition plate and has a surface loaded with a denitration catalyst, the outer bag is sleeved outside the inner bag and has a flexible filter bag structure capable of extending and retracting along the axis direction of the filter cartridge, an isolation assembly is arranged on the inner bag, the isolation assembly comprises a protective cover sleeved on the inner bag and capable of moving synchronously with the outer bag, the protective cover is a flexible cover body capable of being folded, the top end of the protective cover is connected with the bottom of the outer bag, and the bottom end of the protective cover is fixedly connected with the bottom of the inner bag, the isolation assembly further comprises an isolation plate capable of sliding along the axis direction of the filter cartridge, when the outer bag retracts, the isolation plate moves to the top end of the inner bag and forms a sealing fit with the top end opening of the inner bag, and a cleaning assembly for cleaning the surface of the outer bag is arranged on the partition plate at a position corresponding to each filter mechanism.

[0006] Preferably, a cylindrical support frame is arranged in the inner bag, the support frame is coaxial with the inner bag, and the top end of the support frame is fixedly connected with the partition plate; the isolation plate is slidably arranged in the inner part of the support frame, and the top part of the support frame is provided with an abutting ring matched with the isolation plate.

[0007] Preferably, a plurality of mounting rings are arranged in the inner part of the outer bag at intervals along the axis direction of the outer bag, and the mounting rings are fixedly connected with the outer bag; the bottom of the outer bag is provided with a driving ring, the driving ring is connected with a first steel wire rope, and the top part of the partition plate is provided with a winding mechanism capable of driving the first steel wire rope.

[0008] Preferably, the protective cover comprises a flexible telescopic pipe, the top end of the telescopic pipe is fixedly connected with a connecting ring in a coaxial manner, and the bottom end of the telescopic pipe is fixedly connected with a mounting disc in a coaxial manner, and the mounting disc is fixedly connected with the bottom of the support frame.

[0009] Preferably, the bottom of the outer bag is provided with a fixed ring matched with the connecting ring, a sealing ring is arranged between the fixed ring and the connecting ring, and the fixed ring and the connecting ring are connected through bolts.

[0010] Preferably, the winding mechanism comprises a driving shaft arranged on the top part of the support frame, the top part of the support frame is provided with a guide wheel for guiding the first steel wire rope, and the top part of the isolation plate is provided with a second steel wire rope in transmission connection with the driving shaft.

[0011] Preferably, the cleaning assembly comprises an annular driving member rotatably arranged below the partition plate, the annular driving member is coaxial with the corresponding outer bag, the inner wall of the annular driving member is provided with a plurality of elastic scrapers equidistantly arranged around the axis and arranged in an inclined manner.

[0012] Preferably, the outer side of the annular driving member is fixedly connected with a gear ring, the side of the gear ring is provided with a gear meshing connected therewith, the partition plate is provided with a first rotary driving motor for driving the gear, and a dust cover capable of protecting the gear ring and the gear is further arranged below the partition plate.

[0013] Preferably, the top of the support frame is provided with a sensor for monitoring the working condition of the filtering mechanism.

[0014] A denitration device comprises the ash removal catalyst deactivation prevention mechanism of the garbage incinerator.

[0015] The beneficial effects of the present application compared with the prior art are: 1. The present application realizes the cleaning of the accumulated ash on the outer bag surface through the cooperation of the stretching action of the outer bag and the cleaning assembly, reduces the use frequency of the traditional pulse ash removal, and reduces the conventional impact of the pulse airflow on the catalyst; after the outer bag is contracted and the inner bag is isolated, the outer bag can be safely pulse cleaned, which not only improves the thoroughness of the outer bag cleaning by means of the strong cleaning ability of the pulse, but also avoids the direct action of the pulse airflow on the inner bag catalyst, completely eliminates the damage risk of the pulse ash removal to the catalyst, effectively prevents the catalyst from falling off, pulverizing or activity decreasing due to the airflow impact, thereby reducing the direct impact of the pulse airflow on the inner bag catalyst and avoiding the falling off or pulverizing phenomenon of the catalyst due to the frequent impact of the airflow.

[0016] 2. The present application can stabilize the shape of the outer bag when it is expanded through the multiple installation rings arranged at intervals, ensure the filtering efficiency, and make the outer bag uniformly stressed through the cooperative movement when it is contracted, so as to avoid the damage caused by local excessive stretching or folding and prolong the service life of the outer bag; the cooperation of the driving ring, the first steel wire rope and the winding mechanism provides stable driving force for the contraction of the outer bag, ensures the accurate controllability of the contraction action of the outer bag, can be synchronized with the expansion of the protective cover, the sliding of the closing plate and other actions, and guarantees the timeliness and reliability of the isolation of the inner bag.

[0017] 3. The present application can make the scraper uniformly clean and cover the outer periphery of the outer bag through the coaxial arrangement of the annular driving member and the outer bag and the equidistant distribution of the elastic scraper on the inner wall, avoid the occurrence of the cleaning blind area, and ensure that the accumulated ash in each region of the outer bag surface can be effectively removed; the inclined arrangement of the elastic scraper can optimize the ash scraping angle, reduce the accumulation of the accumulated ash at the front end of the scraper, and improve the scraping efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective structural schematic view of the ash removal catalyst deactivation prevention mechanism of the garbage incinerator.

[0019] Figure 2 It is a sectional structural schematic view of the ash removal catalyst deactivation prevention mechanism of the garbage incinerator.

[0020] Figure 3 It is a perspective sectional structure schematic diagram of a waste incinerator ash removal catalyst deactivation prevention mechanism.

[0021] Figure 4 It is Figure 3 The enlarged view at A in the figure.

[0022] Figure 5 It is Figure 3 The enlarged view at B in the figure.

[0023] Figure 6 It is Figure 3 The enlarged view at C in the figure.

[0024] Figure 7 It is a perspective structure schematic diagram of the inside of the outer bag in the waste incinerator ash removal catalyst deactivation prevention mechanism.

[0025] Figure 8 It is a perspective structure schematic diagram of the waste incinerator ash removal catalyst deactivation prevention mechanism when the outer bag is unfolded.

[0026] Figure 9 It is a perspective structure schematic diagram of the waste incinerator ash removal catalyst deactivation prevention mechanism when the outer bag is retracted.

[0027] Figure 10 It is a perspective structure schematic diagram of the local cleaning assembly in the waste incinerator ash removal catalyst deactivation prevention mechanism.

[0028] The figure is marked: 1-filter cylinder; 11-baffle; 12-gas outlet; 13-gas inlet; 2-filter mechanism; 21-outer bag; 211-mounting ring; 212-driving ring; 2121-first steel wire rope; 213-rolling mechanism; 2131-driving shaft; 214-fixing ring; 22-inner bag; 221-support frame; 2211-abutment ring; 2212-guide wheel; 222-sensor; 23-isolation assembly; 231-protection cover; 2311-elastic tube; 2312-connection ring; 2313-mounting disc; 232-isolation plate; 2321-second steel wire rope; 24-cleaning assembly; 241-annular driving piece; 2411-elastic scraper; 242-gear ring; 243-gear; 244-first rotary driving motor. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in combination with the drawings and specific embodiments.

[0030] As Figures 1 to 9The utility model discloses a kind of ash removal catalyst deactivation mechanisms of waste incinerator, including filter cartridge 1, filter cartridge 1 is provided with baffle 11, baffle 11 is distributed with multiple filter mechanism 2, each filter mechanism 2 includes outer bag 21 and inner bag 22, inner bag 22 is fixedly connected with baffle 11 and its surface is loaded with denitration catalyst;Outer bag 21 is set on the outside of inner bag 22, and outer bag 21 is flexible filter bag structure that can stretch along the axis direction of filter cartridge 1;Inner bag 22 is provided with isolation assembly 23, isolation assembly 23 includes protective cover 231 that is set on inner bag 22 and can move synchronously with outer bag 21, protective cover 231 is flexible cover body that can be folded, the top end of protective cover 231 is connected with outer bag 21 bottom, and the bottom of protective cover 231 is fixedly connected with the bottom of inner bag 22;Isolation assembly 23 also includes isolation plate 232 that can slide along the axis direction of filter cartridge 1, when outer bag 21 contracts, isolation plate 232 will move to the top end of inner bag 22 and form sealing cooperation with the top end opening of inner bag 22. Baffle 11 is equipped with cleaning assembly 24 for cleaning the surface of outer bag 21 at the position corresponding to each filter mechanism 2.

[0031] Filter cartridge 1 top is equipped with gas outlet 12, bottom side wall is equipped with gas inlet 13, and baffle 11 is located between gas outlet 12 and gas inlet 13.After the flue gas generated by waste incinerator enters from the lower gas inlet 13 of filter cartridge 1, it will flow through outer bag 21 and inner bag 22 in turn, and outer bag 21 is used as a primary filter structure to intercept large particles in the flue gas first, and inner bag 22 is used to denitrate the flue gas by the denitration catalyst loaded on its surface, and the purified flue gas finally enters the upper side of baffle 11 in filter cartridge 1 through the top end of inner bag 22, and is discharged from the top gas outlet 12.

[0032] When ash needs to be cleaned, outer bag 21 contracts along the axis direction of filter cartridge 1, at which time the originally contracted protective cover 231 will expand synchronously with the stretching and contracting action of outer bag 21, and isolation plate 232 will also slide along the axis direction of filter cartridge 1, with the continuous contraction of outer bag 21, protective cover 231 gradually expands and completely covers the outer periphery of inner bag 22, and isolation plate 232 moves to the top end of inner bag 22, and isolation plate 232 forms sealing cooperation with the opening at the top of inner bag 22, so as to realize the overall isolation of inner bag 22, in the process, cleaning assembly 24 on baffle 11 synchronously cleans the accumulated ash adhered to the surface of outer bag 21, and the deformation of outer bag 21 due to stretching and contracting cooperates with the action of cleaning assembly 24, so that the accumulated ash is difficult to adhere to the surface of outer bag 21 and finally falls off, after outer bag 21 is completely contracted and inner bag 22 is isolated in place, pulse cleaning can be performed on outer bag 21 to further remove the residual accumulated ash on the surface of outer bag 21, and because inner bag 22 has been isolated by protective cover 231 and isolation plate 232, the pulse airflow will not contact the catalyst on the surface of inner bag 22.

[0033] The cleaning of the surface dust of the outer bag 21 is realized through the cooperation of the telescopic action of the outer bag 21 and the cleaning assembly 24, the frequency of using the traditional pulse dust cleaning is reduced, and the conventional impact of the pulse air flow on the catalyst is reduced; after the outer bag 21 is contracted and the inner bag 22 is isolated, the outer bag 21 can be cleaned by pulse cleaning, which not only improves the thoroughness of the outer bag 21 cleaning by the strong cleaning ability of the pulse, but also avoids the direct action of the pulse air flow on the catalyst of the inner bag 22, completely eliminates the damage risk of the pulse dust cleaning to the catalyst, effectively prevents the catalyst from falling off, pulverizing or activity decreasing due to the impact of the air flow, thereby reducing the direct impact of the pulse air flow on the catalyst of the inner bag 22, avoiding the falling or pulverizing phenomenon of the catalyst due to the frequent impact of the air flow; at the same time, the cooperation of the telescopic deformation of the outer bag 21, the cleaning assembly 24 and the pulse cleaning can more comprehensively remove the surface dust of the outer bag 21, reduce the influence of the residual dust on the filtration efficiency and the smoothness of the air flow, and the service life of the catalyst of the inner bag 22 is prolonged under the double isolation protection, which greatly reduces the catalyst supplement frequency and equipment maintenance cost.

[0034] As shown in Figures 3 to 9 The inner bag 22 is internally provided with a cylindrical support frame 221, the support frame 221 is coaxial with the inner bag 22, and the top end of the support frame 221 is fixedly connected with the partition plate 11; the isolation plate 232 is slidably arranged in the inside of the support frame 221, and the top of the support frame 221 is provided with an abutting ring 2211 matched with the isolation plate 232.

[0035] The cylindrical support frame 221 in the inner bag 22 can provide stable support for the inner bag 22 to maintain its shape, and also provides a guide structure for the sliding of the isolation plate 232; when dust cleaning is needed, the isolation plate 232 can slide along the axis direction of the support frame 221 until it matches and fits with the abutting ring 2211 at the top of the support frame 221, and a seal is formed by the cooperation of the abutting ring 2211 and the isolation plate 232, at this time the inner bag 22 is divided into a top area and a bottom area loaded with catalyst, at this time the area in the inner bag 22 located at the top area can be used as a channel for the pulse air flow when cleaning the outer bag 21, so that the pulse air flow can pass through this area and impact the outer bag 21 through the support frame 221, realizing efficient cleaning of the outer bag 21.

[0036] The cylindrical support frame 221 can provide stable support for the inner bag 22 on the one hand, effectively avoiding the deformation of the inner bag 22 due to air flow impact, self-weight and other factors during the flue gas flow or dust removal process, ensuring the full contact of the catalyst on the surface of the inner bag 22 with the flue gas, maintaining the stable efficiency of the denitration reaction, and providing a precise guide structure for the sliding of the isolation plate 232, ensuring that the isolation plate 232 can move along the fixed axis, avoiding sealing failure or cleaning misalignment caused by deviation; on the other hand, the sealing structure formed after the isolation plate 232 slides to the abutting ring 2211 on the top of the support frame 221 can separate the inner bag 22 into a pulse channel and a catalyst area, which can block the pulse airflow from entering the area of the catalyst loaded at the bottom of the inner bag 22, completely avoiding the direct impact of the pulse airflow on the catalyst, preventing the catalyst from falling off, pulverizing or reducing activity, effectively protecting the catalyst performance and prolonging its service life.

[0037] In addition, the pulse channel formed at the top of the inner bag 22 can provide a smooth path for the airflow, so that the pulse airflow can be concentrated to impact the outer bag 21 outward through the support frame 221, ensuring that the airflow impact force is uniformly applied to the surface of the outer bag 21, improving the cleaning effect of the accumulated dust on the outer bag 21, reducing the influence of the accumulated dust on the filtration efficiency, and at the same time, without worrying about the damage of the pulse airflow to the catalyst, the dust cleaning efficiency and catalyst protection are considered, and the equipment maintenance cost and catalyst replenishment frequency are reduced.

[0038] As shown in Figures 3 to 9 The bottom of the outer bag 21 is provided with a driving ring 212, the driving ring 212 is connected with a first steel wire rope 2121, and the top of the partition plate 11 is provided with a winding mechanism 213 capable of driving the first steel wire rope 2121.

[0039] The plurality of mounting rings 211 spaced apart along the axis direction inside the outer bag 21 are fixedly connected with the outer bag 21, which can provide support for the outer bag 21 when the flue gas flows, maintain the unfolded form of the outer bag 21, and ensure that the outer bag 21 has sufficient filtration area to efficiently intercept large particle dust; when dust needs to be removed, the winding mechanism 213 at the top of the partition plate 11 is started and a driving force is generated on the first steel wire rope 2121, the first steel wire rope 2121 drives the driving ring 212 at the bottom of the outer bag 21 to rise along the axis direction of the filter cartridge 1, and the driving ring 212 rises to drive the adjacent mounting ring 211 to move synchronously, and then the plurality of mounting rings 211 are linked in sequence, and the outer bag 21 is collectively pulled to shrink along the axis direction, realizing the stretching and contracting action of the outer bag 21.

[0040] The plurality of installation rings 211 arranged at intervals can stabilize the shape of the outer bag 21 when the outer bag 21 is expanded, ensure the filtering efficiency, and can make the outer bag 21 bear force uniformly through cooperative movement when the outer bag 21 is contracted, so as to avoid damage caused by local excessive stretching or folding and prolong the service life of the outer bag 21; the cooperation of the driving ring 212, the first steel wire rope 2121 and the winding mechanism 213 provides stable driving force for the contraction of the outer bag 21, ensures the precise controllability of the contraction action of the outer bag 21, can be synchronized with the expansion of the protective cover 231, the sliding of the closing plate and other actions, and guarantees the timeliness and reliability of the isolation of the inner bag 22; at the same time, the outer bag 21 is driven by the installation ring 211 and the driving ring 212 to realize regular contraction, the surface deformation is more uniform, can form more effective cooperation with the cleaning assembly 24, improve the dust cleaning effect, and the driving mode of the winding mechanism 213 is convenient for adjusting the contraction amplitude and speed according to the dust accumulation of the outer bag 21, further optimizing the dust cleaning efficiency.

[0041] In order to facilitate the connection of the driving ring 212 and the installation ring 211 with the first steel wire rope 2121 and optimize the transmission of driving force, a plurality of connecting ears can be arranged symmetrically on the outer periphery of the driving ring 212 and each installation ring 211, and a hole for the first steel wire rope 2121 to pass through or be fixed is arranged on the connecting ear; the first steel wire rope 2121 is connected with the driving ring 212 and the installation ring 211 by passing through the hole of the connecting ear, the connecting ear not only provides a stable connecting fulcrum for the first steel wire rope 2121, but also can guide the direction of the first steel wire rope 2121, avoid friction or winding of the first steel wire rope 2121 with the inner wall of the outer bag 21 during winding or releasing, ensure that the driving force can be stably transmitted to the driving ring 212 and each installation ring 211 along the axis direction of the filter cartridge 1, make the outer bag 21 bear force more uniformly when contracting, and further guarantee the smoothness and synchronization of the extension and contraction action of the outer bag 21.

[0042] As shown in Figures 3 to 9 The protective cover 231 includes a flexible telescopic tube 2311, a connecting ring 2312 is coaxially and fixedly connected to the top end of the telescopic tube 2311, an installation disc 2313 is coaxially and fixedly connected to the bottom end of the telescopic tube 2311, and the installation disc 2313 is fixedly connected with the bottom of the support frame 221.

[0043] The telescopic tube 2311 is connected with the bottom of the outer bag 21 through the connecting ring 2312 at the top end, and the bottom end of the telescopic tube 2311 is fixed to the bottom of the support frame 221 through the mounting disc 2313, so that the telescopic tube 2311 can form a protective structure coaxial with the inner bag 22. When the outer bag 21 is contracted along the axis of the filter cartridge 1, the connecting ring 2312 moves upward synchronously with the outer bag 21, thereby driving the telescopic tube 2311 to gradually expand along the outer periphery of the inner bag 22, and the inner wall of the telescopic tube 2311 and the outer wall of the inner bag 22 always maintain a certain gap during the process, avoiding contact and friction between the telescopic tube 2311 and the catalyst on the surface of the inner bag 22 when the telescopic tube 2311 expands, thereby preventing the catalyst from being damaged; when the outer bag 21 is expanded and reset along the axis of the filter cartridge 1, the connecting ring 2312 moves downward synchronously with the outer bag 21, and the telescopic tube 2311 is folded and retracted at the bottom of the inner bag 22. Among them, the fixed connection of the mounting disc 2313 and the bottom of the support frame 221 provides a stable support base point for the telescopic tube 2311, ensuring that the telescopic tube 2311 always maintains a coaxial state with the inner bag 22 and the support frame 221 during the whole process of expansion and contraction, effectively avoiding wrinkles or blind areas caused by deviation. At the same time, the flexible telescopic tube 2311 can deform flexibly with the action of the outer bag 21, and is retracted and stored at the bottom of the inner bag 22 when contracted, without occupying the flue gas flow space and affecting the normal denitration reaction and flue gas filtration efficiency of the inner bag 22. While achieving effective protection of the catalyst, the normal operation performance of the equipment is also taken into account.

[0044] As shown in Figures 3 to 9 The bottom of the outer bag 21 is provided with a fixed ring 214 matched with the connecting ring 2312, a sealing ring is arranged between the fixed ring 214 and the connecting ring 2312, and the fixed ring 214 and the connecting ring 2312 are connected through bolts.

[0045] In assembly, the fixing ring 214 is aligned and attached to the connecting ring 2312, and the fastening connection is achieved by passing the bolt through the corresponding hole positions of the fixing ring 214 and the connecting ring 2312, and at the same time, the sealing ring clamped between the attached surfaces of the fixing ring 214 and the connecting ring 2312 is compressed to form a sealed fit. When the rolling mechanism 213 drives the outer bag 21 to shrink along the axis of the filter cartridge 1, the outer bag 21 drives the fixing ring 214 at the bottom to move upward synchronously, and the fixing ring 214 transmits the driving force to the connecting ring 2312 through the rigid connection of the bolt, and then drives the telescopic pipe 2311 to expand synchronously with the connecting ring 2312; when the outer bag 21 is expanded and reset, the fixing ring 214 moves downward with the outer bag 21, and also drives the telescopic pipe 2311 to contract and be accommodated through the stable connection with the connecting ring 2312; throughout the process, the bolt always maintains the reliable connection of the fixing ring 214 and the connecting ring 2312, and the sealing ring continuously blocks the gap between them to avoid the gap. It effectively avoids the loosening, deviation or even disconnection of the fixing ring 214 and the connecting ring 2312 during the repeated expansion and contraction of the outer bag 21, ensures that the expansion and contraction action of the outer bag 21 can be accurately transmitted to the connecting ring 2312, and then guarantees the synchronization of the expansion and contraction of the telescopic pipe 2311 and the action of the outer bag 21, providing stable cooperation for the isolation and protection of the inner bag 22; the sealing ring between the fixing ring 214 and the connecting ring 2312 can completely block the gap of the connecting part to prevent the accumulated dust or pulse airflow from seeping in from the gap during dust removal, avoiding pollution or impact on the catalyst on the surface of the inner bag 22; at the same time, the detachable setting of the bolt connection facilitates the separate disassembly, maintenance and replacement of the outer bag 21 or the telescopic pipe 2311 in the later period, without the need to disassemble the entire filter mechanism 2, reducing the difficulty of maintenance operation, and the setting of the sealing ring further improves the reliability of the connecting part, reduces the catalyst protection hidden danger caused by sealing failure, and takes into account the structural stability, protection sealing and maintenance convenience.

[0046] As shown in Figures 3 to 9 The rolling mechanism 213 includes a drive shaft 2131 arranged at the top of the support frame 221, and the top of the support frame 221 is provided with a guide wheel 2212 for guiding the first steel wire rope 2121, and the top of the isolation plate 232 is provided with a second steel wire rope 2321 in transmission connection with the drive shaft 2131.

[0047] When the winding mechanism 213 is working, the driving shaft 2131 rotates, and through the winding or releasing action of the first steel wire rope 2121, combined with the guiding of the top guide wheel 2212 of the support frame 221 to the first steel wire rope 2121, the outer bag 21 is driven to stretch or contract along the axis direction of the filter cartridge 1; at the same time, the driving shaft 2131 synchronously winds or releases the second steel wire rope 2321, so that the second steel wire rope 2321 drives the isolation plate 232 to move synchronously. Since the driving shaft 2131 provides unified rotating power for the first steel wire rope 2121 and the second steel wire rope 2321, and the guiding and adjusting of the first steel wire rope 2121 by the guide wheel 2212, the winding and releasing processes of the first steel wire rope 2121 and the second steel wire rope 2321 can be kept in cooperation, so that the synchronous movement of the isolation plate 232 and the outer bag 21 is realized.

[0048] The driving shaft 2131 as a unified power source can ensure that the power transmission of the first steel wire rope 2121 and the second steel wire rope 2321 has synchronism, so that the actions of the isolation plate 232 and the outer bag 21 are always consistent when moving, avoiding problems such as jamming and deviation of the outer bag 21 or the isolation plate 232 caused by asynchronous power, ensuring the coordination of the stretching and contraction of the outer bag 21 and the action of the isolation plate 232, and improving the operation stability of the entire ash removal and catalyst deactivation prevention mechanism. At the same time, the guide wheel 2212 plays a guiding role for the first steel wire rope 2121, optimizes the stress and direction of the first steel wire rope 2121, reduces the friction loss in the movement process, prolongs the service life of the steel wire rope, and also makes the transmission of the first steel wire rope 2121 more smooth, further ensuring the reliability of the synchronous action of the isolation plate 232 and the outer bag 21.

[0049] As shown in Figure 3 , Figure 5 , Figure 6 and Figure 10 : the cleaning assembly 24 includes an annular driving member 241 which is rotatably arranged below the partition plate 11 and coaxially arranged with the corresponding outer bag 21, and a plurality of elastic scrapers 2411 which are equidistantly arranged around the axis of the annular driving member 241 and are arranged in an inclined manner on the inner wall of the annular driving member 241.

[0050] When the cleaning assembly 24 is working, the annular driving member 241 rotates around the axis coaxial with the outer bag 21, and the plurality of elastic scrapers 2411 on the inner wall of the annular driving member 241 rotate synchronously with the annular driving member 241. During the rotation process, the elastic scrapers 2411 can slide along the outer wall of the outer bag 21 to scrape off the accumulated ash on the surface of the outer bag 21; at the same time, in the process of the contraction or expansion of the outer bag 21 along the axis of the filter cartridge 1, the elastic scrapers 2411 can adapt to the morphological changes of the outer bag 21 and always maintain effective contact with the outer wall of the outer bag 21, so as to ensure that the accumulated ash can be cleaned in different states.

[0051] The annular driving member 241 is coaxially arranged with the outer bag 21, cooperates with the elastic scrapers 2411 equidistantly distributed on the inner wall, can make the scrapers form uniform cleaning coverage on the outer periphery of the outer bag 21, avoids the occurrence of a cleaning blind area, ensures that the dust accumulated on each region of the surface of the outer bag 21 can be effectively removed, the inclined arrangement of the elastic scrapers 2411 can optimize the dust scraping angle, reduces the accumulation of dust at the front end of the scraper, improves the scraping efficiency, the selection of the elastic material can ensure the close contact between the scraper and the outer wall of the outer bag 21, and can also avoid damage to the outer bag 21 caused by rigid friction, prolonging the service life of the outer bag 21; in addition, the rotating action of the cleaning assembly 24 can be cooperated with the stretching and contracting action of the outer bag 21, realizes the dynamic cleaning of the dust without additional complex driving structure, reduces the dust residue on the surface of the outer bag 21, protects the filtering efficiency and airflow smoothness of the outer bag 21, and further reduces the maintenance frequency and cost of the equipment.

[0052] As shown in Figure 3 , Figure 5 , Figure 6 and Figure 10 : the outer side of the annular driving member 241 is fixedly connected with a gear ring 242, the side of the gear ring 242 is provided with a gear 243 engagedly connected therewith, the partition plate 11 is provided with a first rotary driving motor 244 for driving the gear 243, and a dust cover capable of protecting the gear ring 242 and the gear 243 is further arranged below the partition plate 11.

[0053] The first rotary driving motor 244 is started, the output shaft of the first rotary driving motor 244 drives the gear 243 to rotate, the gear 243 drives the annular driving member 241 to synchronously rotate through the meshing transmission with the gear ring 242, and then the elastic scrapers 2411 on the inner wall of the annular driving member 241 rotate with it, realizing the cleaning of the surface of the outer bag 21; at the same time, the dust cover always protects the gear ring 242 and the gear 243, blocking the ash and impurities in the flue gas from entering the meshing gap. The meshing transmission of the gear ring 242 and the gear 243 can provide stable rotary power for the annular driving member 241, and in cooperation with the precise control of the first rotary driving motor 244, the rotating speed of the annular driving member 241 can be flexibly adjusted to adapt to the cleaning needs of different dust accumulation degrees, ensuring the cleaning effect of the elastic scrapers 2411; the arrangement of the dust cover can effectively avoid the attachment of dust and impurities on the tooth surface or meshing gap of the gear ring 242 and the gear 243, prevent the transmission from being jammed and the wear from being aggravated due to dust accumulation, prolong the service life of the transmission components, and reduce the maintenance frequency.

[0054] As shown in Figures 1 to 3 and Figure 6 : the top of the support frame 221 is provided with a sensor 222 for monitoring the working condition of the filtering mechanism 2.

[0055] The sensor 222 is arranged corresponding to the filtering mechanism 2, and can detect the running resistance, surface ash state or flue gas flow parameter of the outer bag 21 in real time; the sensor 222 is electrically connected with the control unit, and can transmit the monitoring data to the control unit; the control unit judges the cleaning requirement of the outer bag 21 according to a preset threshold value, and then controls the starting time and operation parameter of the winding mechanism 213, the cleaning assembly 24 and the pulse cleaning.

[0056] When the sensor 222 works, the running state of the outer bag 21 in the filtering process is continuously monitored, the parameters such as the resistance change, ash thickness or flue gas flow rate of the outer bag 21 are captured, and the ash deposition degree of the outer bag 21 is reflected in real time; when the monitoring data reaches the preset cleaning threshold value, the sensor 222 transmits a signal to the control unit, the control unit starts the winding mechanism 213 to drive the outer bag 21 to shrink, synchronously triggers the cleaning assembly 24 to work, and starts the pulse cleaning when needed, so as to realize the accurate cleaning of the outer bag 21; when the outer bag 21 is cleaned and the monitoring data returns to the normal range, the sensor 222 feeds back a signal again, and the control unit controls the reset of each mechanism to restore the normal filtering state. The real-time monitoring of the sensor 222 changes the traditional timing cleaning of the outer bag 21 to on-demand cleaning, avoids the over-cleaning or insufficient cleaning caused by the timing cleaning, and significantly improves the accuracy and economy of the cleaning; through the coordinated control of the control unit on each mechanism, it can ensure that the cleaning action matches the actual state of the outer bag 21, which guarantees that the surface ash of the outer bag 21 is completely removed, reduces unnecessary mechanical actions, prolongs the service life of the outer bag 21 and the cleaning assembly 24, and the like; at the same time, the real-time monitoring data can be used as a basis for judging the running state of the equipment, so as to find abnormal conditions in time, reduce hidden troubles, and ensure long-term stable operation of the equipment.

[0057] A denitration device comprising the above-mentioned ash removal catalyst deactivation prevention mechanism for a waste incinerator.

[0058] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A ash removal and catalyst deactivation prevention mechanism for a waste incinerator, comprising a filter cartridge, characterized in that, The filter cartridge is equipped with a baffle plate, on which multiple filtration mechanisms are arranged. Each filtration mechanism includes an outer bag and an inner bag. The inner bag is fixedly connected to the baffle plate and its surface is loaded with a denitrification catalyst. The outer bag is fitted over the inner bag, and the outer bag is a flexible filter bag structure that can stretch and contract along the axis of the filter cartridge. An isolation component is provided on the inner bag. The isolation component includes a protective cover that is fitted onto the inner bag and can move synchronously with the outer bag. The protective cover is a foldable flexible cover. The top of the protective cover is connected to the bottom of the outer bag, and the bottom of the protective cover is fixedly connected to the bottom of the inner bag. The isolation assembly also includes an isolation plate that can slide along the axis of the filter cartridge. When the outer bag contracts, the isolation plate moves to the top of the inner bag and forms a sealing fit with the top opening of the inner bag. Each filter unit on the partition is equipped with a cleaning component to remove dust from the surface of the outer bag.

2. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 1, characterized in that, The inner bag has a cylindrical support frame inside, which is coaxial with the inner bag and the top of the support frame is fixedly connected to the partition. The partition is slidably installed inside the support frame, and the top of the support frame has an abutment ring that matches the partition.

3. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 2, characterized in that, The outer bag has multiple mounting rings spaced apart along its axis inside, and all mounting rings are fixedly connected to the outer bag; a drive ring is provided at the bottom of the outer bag, and a first steel wire rope is connected to the drive ring; a winding mechanism that can drive the first steel wire rope is provided at the top of the partition.

4. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 3, characterized in that, The protective cover includes a flexible telescopic tube, with a connecting ring coaxially fixed to the top end of the telescopic tube and a mounting plate coaxially fixed to the bottom end of the telescopic tube. The mounting plate is fixedly connected to the bottom of the support frame.

5. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 4, characterized in that, The bottom of the outer bag is equipped with a fixing ring that matches the connecting ring. A sealing ring is provided between the fixing ring and the connecting ring, and the fixing ring and the connecting ring are connected by bolts.

6. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 3, characterized in that, The winding mechanism includes a drive shaft located on the top of the support frame, a guide wheel located on the top of the support frame to guide the first wire rope, and a second wire rope located on the top of the isolation plate and connected to the drive shaft.

7. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 1, characterized in that, The cleaning component includes an annular drive unit, which is rotatably disposed below the partition and coaxially disposed with the corresponding outer bag. The inner wall of the annular drive unit is provided with a plurality of elastic scrapers that are equidistantly arranged around its axis and inclined.

8. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 7, characterized in that, A gear ring is fixedly connected to the outer side of the ring drive component, and a gear meshing with it is provided on the side of the gear ring. A first rotary drive motor for driving the gear is provided on the partition plate, and a dust cover for protecting the gear ring and the gear is provided below the partition plate.

9. The ash removal and catalyst deactivation prevention mechanism for a waste incinerator according to claim 2, characterized in that, The top of the support frame is equipped with sensors for monitoring the working status of the filtration mechanism.

10. A denitrification device, comprising a waste incinerator ash removal and catalyst deactivation prevention mechanism as described in any one of claims 1-9.

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