CN117983527A - Dry-type fly ash recovery treatment device and method - Google Patents

Abstract

The invention relates to the technical field of waste recycling, and particularly provides a dry fly ash recycling device and method; the device comprises a vibrating screen body, wherein the vibrating screen body comprises a screen bed which is arranged in an inclined manner; a transverse pushing and disturbing mechanism is arranged above the bed surface of the sieve bed, and an intermittent material blocking mechanism is arranged on the transverse pushing and disturbing mechanism in a matched mode; the device provided by the invention adopts a sieve bed structural design with single sieve plate and multiple sieve areas, and through the matched arrangement of the assembled horizontal pushing material disturbing mechanism and the intermittent material blocking mechanism, in the sieving process, not only can the fly ash be fully disturbed and dispersed, so that the materials are dispersed and tiled, local accumulation is avoided, the aggregation effect of the fly ash is greatly weakened, the sieve holes can be synchronously cleaned, the materials can be promoted to quickly pass through the sieve holes, in addition, the stay sieving time of the fly ash in the single sieve area is prolonged, the sieving sufficiency is improved, the repeated sieving of the materials is avoided, and the treatment efficiency of the sieving and recycling of the fly ash is greatly improved.

Description

Dry-type fly ash recovery treatment device and method

Technical Field

The invention relates to the technical field of waste recycling, and particularly provides a dry fly ash recycling device and method.

Background

Fly ash generally refers to fine ash collected from flue gas after coal combustion, and is the main solid waste discharged from coal-fired power plants. The great amount of electricity is required, so that a great amount of fly ash is generated in the coal-fired thermal power generation process, if the great amount of fly ash is not treated, dust is generated, the atmosphere is polluted, and if the fly ash is discharged into a water system, river siltation is caused, and the fly ash possibly damages human bodies and organisms due to toxic chemical substances in the fly ash. Therefore, it is necessary to recycle the fly ash to realize the recycling. The particle size of the fly ash formed by natural combustion of the coal is inconsistent, and the fly ash can be correspondingly and widely applied to various fields of concrete, cement, building materials, chemical industry, agriculture and the like after being subjected to screening classification treatment in the recovery process.

The fly ash can be screened and classified through screening equipment, the screening equipment is various, the most common and most widely applied vibrating screen is specifically classified into a disc type vibrating screen and a plate type vibrating screen, the plate type vibrating screen is more common, and the screening equipment is also applicable to screening of the fly ash. According to the screening stage number of the fly ash, a plate type vibrating screen with a single-layer screen plate structure or a multi-layer screen plate structure can be correspondingly selected, but the existing plate type vibrating screen is relatively simple in structure, and basically only depends on mechanical vibration to screen materials, and the fly ash is different from general materials, so that the following problems exist: 1) The screen plate sieve holes of the plate type vibrating screen with the single-layer screen plate structure are only one size, so that the plate type vibrating screen is only suitable for two-stage screening and has lower classification precision.

2) The plate-type vibrating screen with the multi-layer screen plate structure is provided with the multi-layer screen plates, so that the requirement of multi-stage screening is met, but fly ash is fine powder material, dust raising is serious in the process of layer-by-layer blanking through the multi-layer screen plates, heavy pollution exists to the working environment, and excessive fly ash with slight quality floats easily along with air, so that the fly ash cannot effectively and rapidly pass through screen holes of the screen plates, and the screening effect is influenced.

3) Whether it is a single-layer or multi-layer plate type vibrating screen, the materials are randomly put in during screening, and the materials are randomly spread on the screen plate along with the vibrating process, in order to ensure the screening effect, the put rate and the put amount of the materials generally need to be controlled in principle, but when a large amount of materials are put in for screening, it is obvious that the materials are unevenly dispersed and have thicker and piled conditions locally, so that the screening effect and the screening efficiency are affected.

4) As for the self characteristics of the fly ash, the fly ash is more difficult to screen compared with larger particle materials; firstly, the fly ash has small volume and light weight, is easily interfered by factors such as air flow, vibration and the like in the vibration screening process, and is difficult to stably pass through a screen in the screening process, so that the fly ash is unevenly distributed on the screen, and the screening efficiency is reduced; in addition, the adhesiveness and the cohesive force between the fly ash are strong, agglomerates are easy to form, the effective diameter of the particles is increased by the agglomerates, the particles are difficult to pass through the sieve holes, the blocking of the sieve holes can be caused, and the sieving difficulty is further increased.

Disclosure of Invention

In order to solve the above problems, the present invention provides a dry fly ash recycling device and method for solving the problems mentioned in the background art.

In order to achieve the above purpose, the present invention is implemented by adopting the following technical scheme: the dry-type fly ash recovery treatment device comprises a vibrating screen body, wherein the vibrating screen body comprises a screen bed which is obliquely arranged and installed; the upper part of the bed surface of the sieve bed is provided with a transverse pushing and disturbing mechanism, and the transverse pushing and disturbing mechanism is provided with an intermittent material blocking mechanism in a matched mode.

The sieve bed is provided with a plurality of sections of sieve areas with sieve pore sizes from small to large along the inclined direction from top to bottom.

The transverse pushing and disturbing mechanism comprises a reciprocating transverse pushing assembly assembled on the sieve bed, the reciprocating transverse pushing assembly comprises a transverse pushing frame which is arranged in a horizontal reciprocating sliding driving manner in the direction perpendicular to the width direction of the sieve bed, and the frame surface of the transverse pushing frame is arranged in parallel relative to the bed surface of the sieve bed; the bottom end of the transverse pushing frame is fixed with a plurality of material disturbing plates which are sequentially and uniformly distributed along the moving direction of the transverse pushing frame, and the material disturbing plates are arranged in an extending way along the whole section of the inclined direction of the sieve bed; two adjacent material disturbing plates are separated to form a screening channel which flows along the inclined direction of the screening bed and dynamically changes along with the movement of the transverse pushing frame.

The intermittent stock stop comprises a reciprocating movement assembly fixedly assembled at the top end of the transverse pushing frame, and the reciprocating movement assembly comprises a movement frame which is arranged in a reciprocating manner along the inclined direction of the sieve bed; a plurality of material blocking parts which are all fixed between two material disturbing plates are arranged in the screening channel, the material blocking parts are distributed at the separation boundary line of the multi-section screening areas in a one-to-one correspondence mode, the screening areas are separated from the material blocking parts adjacent to the lower part in the screening channel to form a plurality of screening spaces, the material blocking parts adjacent to the lower part in each screening space are matched with the material disturbing parts, and the material blocking parts are fixed at the bottom end of the movable frame; in the process that the moving frame drives the bulk material component to move, when the bulk material component is not contacted with the material blocking component, the material blocking component is in a closed state to the screening channel, and when the bulk material component moves to be contacted with the material blocking component and is nearest to the material blocking component, the material blocking component is in an open state.

Preferably, the material disturbing plate comprises an air chamber beam which is fixed at the bottom end of the transverse pushing frame and is in a cavity structure, a plug-in bin which is in a cavity structure is fixedly arranged at the bottom end of the air chamber beam in a plug-in fit manner, and the cavities of the plug-in bin and the air chamber beam are in a communication state; a plurality of groups of material disturbing brushes are fixed at the bottom end of the plug-in bin and are distributed at intervals along the length direction, and the material disturbing brushes are contacted with the sieve bed surface; and air injection holes are formed in the bottom end of the plug-in bin at intervals between any two adjacent clusters of winding brushes.

Preferably, the material blocking component comprises a main material blocking plate fixed between two adjacent air chamber beams, wherein a plurality of material blocking strips are arranged at the lower end of the main material blocking plate, and a material passing opening is formed between the two adjacent material blocking strips at intervals; the main material baffle is in sliding connection with a secondary material baffle which is arranged vertically relative to the bed surface of the sieve bed, and at least one reset spring is connected between the secondary material baffle and the main material baffle; a plurality of sealing laths which are inserted in a plurality of material through holes in a one-to-one correspondence manner to form a closed state are arranged below the auxiliary baffle plate.

Preferably, the bulk cargo part comprises a matched supporting block fixed at the bottom end of the movable frame, a rotary supporting plate which is parallel to the surface of the sieve bed is fixed at the bottom end of the matched supporting block, and a plurality of bulk cargo paddles are rotatably arranged on the rotary supporting plate.

Preferably, the top end of the auxiliary baffle plate is horizontally rotatably provided with a roller; the supporting block is provided with a supporting groove which is contacted with the roller when moving close to the supporting block; the lifting groove comprises a parallel surface which is parallel to the sieve bed surface and an inclined surface which is arranged at an obtuse angle with the parallel surface, and the inclined surface and the parallel surface are distributed up and down and are in arc transition at the boundary; when the bulk material component approaches the material blocking component, the lifting groove extends to the lower side of the roller.

Preferably, when the material blocking component is in a closed state, the lower ends of the sealing laths are aligned with the lower ends of the material blocking laths and are contacted with the sieve bed surface.

Preferably, the bottom end of the air chamber beam is provided with a plugging groove extending to two ends along the length direction of the air chamber beam, and a plugging air port is arranged in the plugging groove; the top end of the plug-in bin is plugged in the plug-in groove, a butt-joint air port is formed in the top end of the plug-in bin, and the butt-joint air port and the plug-in air port are in a plug-in conduction state.

Preferably, the main baffle plate is provided with a through slot, and the main baffle plate is provided with two guide grooves; the sealing lath penetrates and is inserted into the penetrating slot, two sliding blocks in one-to-one sliding fit with the two guide grooves are arranged on the auxiliary striker plate, and the idler wheels are rotatably arranged between the top ends of the two sliding blocks.

Preferably, the bottom end of the sieve bed is fixed with a blanking collection bin, and the separation positions of a plurality of sieve areas in the blanking collection bin are correspondingly arranged at intervals.

In addition, the invention also provides a dry fly ash recovery treatment method, which specifically comprises the following steps: s1, starting the processing device provided by the invention to enable the processing device to be in a working state.

S2, conveying and throwing dry fly ash into the device through external conveying equipment.

S3, the fly ash is dispersed into a screening channel, and is screened step by step in a plurality of screening spaces of the screening channel.

S4, respectively transferring and conveying the multi-stage dry fly ash obtained by screening, and independently stacking and storing.

The technical scheme has the following advantages or beneficial effects: the invention provides a dry-type fly ash recovery processing device and a dry-type fly ash recovery processing method, which adopt the sieve bed structural design of single sieve plate and multiple sieve areas, the device is more compact, the multi-stage sieving requirement is met, and meanwhile, the problem of a large amount of dust emission in the process of sieving and layer-by-layer blanking of the fly ash by a plate-type vibrating sieve with a multi-layer sieve plate structure is greatly avoided; through the cooperation setting of horizontal pushing disturbance material mechanism and intermittent type stock stop of assembly, further separate the screening space that forms dynamic movement thereupon on separating the basis that forms the screening passageway, in screening process, can carry out abundant disturbance dispersion to the fly ash for the material disperses tiling, avoids local piling up, also weakens the agglomeration effect of fly ash greatly, can clear up the sieve mesh in step, and promote the material to pass through the sieve mesh fast, in addition, prolonged the stay screening time of fly ash in single screening subregion, improved the sufficiency of screening, avoided the repeated screening of material, improved the treatment effeciency that the fly ash was retrieved in the screening greatly.

Drawings

The invention and its features, aspects and advantages will become more apparent from the detailed description of non-limiting embodiments with reference to the following drawings. Like numbers refer to like parts throughout the several views, and are not intended to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic perspective view of a dry fly ash recovery treatment device provided by the invention.

Fig. 2 is a plan view of a dry fly ash recovery treatment device provided by the invention.

Fig. 3 is a side view of a dry fly ash recovery processing device provided by the invention.

Fig. 4 is a front view of a dry fly ash recovery treatment device provided by the invention.

Fig. 5 is a perspective view of the vibrating screen body without the material blocking side plate.

Fig. 6 is a perspective view of the horizontal pushing and disturbing mechanism.

Fig. 7 is a perspective view of the intermittent dam mechanism.

Fig. 8 is a perspective view of a blanking plate.

Fig. 9 is a perspective view of the air chamber beam.

Fig. 10 is a perspective view of the docking pod.

Fig. 11 is a schematic diagram of the cooperation of the baffle member and the bulk material member.

Fig. 12 is a perspective view of a main dam plate.

Fig. 13 is a perspective view of the secondary dam plate.

Fig. 14 is a perspective view of the bulk material member.

Fig. 15 is a flow chart of a method for recycling and treating dry fly ash provided by the invention.

In the figure: 1. a vibrating screen body; 11. a vibration support; 12. a sieve bed; 13. a feed hopper; 14. a material blocking side plate; 15. a blanking and collecting bin; 2. a horizontal pushing and disturbing mechanism; 21. a reciprocating transverse pushing assembly; 211. a transverse pushing frame; 212. a guide rod is horizontally arranged; 22. a material disturbing plate; 221. an air chamber beam; 2211. a plug-in groove; 2212. an air port is inserted; 2213. an air inlet; 222. a plug-in bin; 2221. a butt joint gas port; 2222. a material disturbing brush; 2223. a gas injection hole; 3. an intermittent material blocking mechanism; 31. a reciprocating assembly; 311. a guide frame; 3111. a bearing seat plate; 3112. connecting a guide rod in series; 312. a driving motor; 313. a screw rod; 314. a moving frame; 32. a material blocking component; 321. a main baffle plate; 3211. penetrating the slot; 3212. a material blocking slat; 3213. a guide groove; 322. a return spring; 323. an auxiliary baffle plate; 3231. sealing the slat; 3232. a slide block; 3233. a roller; 33. a bulk material component; 331. matching with a supporting block; 3311. a lifting groove; 332. rotating the support plate; 333. a material dispersing paddle; 3331. bottoming ball.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order that those skilled in the art will better understand the present invention, the following description will be given in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1,2 and 3, a dry fly ash recovery treatment device comprises a vibrating screen body 1, wherein the vibrating screen body 1 comprises a screen bed 12 arranged in an inclined manner and a vibrating support 11 supported and installed at the bottom end of the screen bed 12, the vibrating screen body 1 is a main body structure of an existing plate-type vibrating screen and can perform vibrating screening, and the specific structure of the vibrating screen is not described herein; a transverse pushing and disturbing mechanism 2 is arranged above the bed surface of the sieve bed 12, and an intermittent material blocking mechanism 3 is arranged on the transverse pushing and disturbing mechanism 2 in a matched mode. In the embodiment, the device provided by the invention can be used for carrying out four-stage classification screening on dry fly ash, and then realizing classification recovery, so that the fly ash can be classified and applied to the corresponding fields. The dry fly ash is dry fly ash, so that the influence of moisture possibly remained in the fly ash on screening is not considered in the screening process.

As shown in fig. 1, 3,4 and 5, in the invention, a single sieve plate structure is adopted, but three sections of sieve sections with sieve pore sizes being arranged from small to large are distributed on the sieve bed 12 from top to bottom in sequence along the inclined direction, and in particular, the three sections of sieve sections are formed by splicing sieve plates with the three sieve pore sizes, so that the whole structure of the device is more compact, the occupied space is smaller, the requirement of multi-stage sieving is met, and meanwhile, the problem of a large amount of dust in the process of sieving and layer-by-layer blanking of the fly ash by the plate type vibrating sieve with the multi-layer sieve plate structure is avoided. For the convenience of guiding feeding, a feeding hopper 13 directly used for feeding materials is welded and assembled at the inclined upper end position of the sieve bed 12; in order to guide the blanking collection in a grading way, a blanking collection bin 15 is welded at the bottom end of a sieve bed 12, and the separation positions of three sieving areas in the blanking collection bin 15 are correspondingly and separately arranged, namely, three independent collection spaces corresponding to the three sieving areas one by one are separated in the blanking collection bin 15, and the bottom ends of the three independent collection spaces are correspondingly provided with discharge holes, and the sieved materials can be conveyed and transferred at the discharge holes through a material conveyor, so that in the device provided by the invention, four-level fine sieving can be performed on the fly ash, three particle grades can be sequentially and independently collected and discharged from the three independent collection spaces distributed downwards in an inclined way from small to large, and the fly ash with the largest particle grade left can finally slide down the sieve bed 12 from the lower end; in addition, the material blocking side plates 14 are correspondingly welded at the positions of the two sides of the upper end of the sieve bed 12.

As shown in fig. 1,4 and 6, the horizontal pushing and disturbing mechanism 2 comprises a reciprocating horizontal pushing assembly 21 assembled on the sieve bed 12, the reciprocating horizontal pushing assembly 21 comprises a horizontal pushing frame 211 which is horizontally and reciprocally driven along the width direction of the sieve bed 12, two horizontal guide rods 212 are welded on two side walls of the horizontal pushing frame 211 facing to two material blocking side plates 14, the horizontal guide rods 212 are horizontally and slidably installed on the material blocking side plates 14 on the adjacent side, and in the prior art, the horizontal pushing frame 211 can realize reciprocating movement in various manners, for example, an existing reciprocating straight cylinder can be assembled on one material blocking side plate 14, and the horizontal pushing frame 211 is fixed at the output end of the reciprocating straight cylinder. The frame surface of the transverse pushing frame 211 is arranged in parallel relative to the bed surface of the sieve bed 12. In the present embodiment, five material disturbing plates 22 are fixed at the bottom end of the horizontal pushing frame 211, and the material disturbing plates 22 are uniformly distributed in sequence along the moving direction, and the material disturbing plates 22 are arranged in a whole section extending along the inclined direction of the sieve bed 12; adjacent two of the material disturbing plates 22 are separated to form sieving passages which circulate along the inclined direction of the sieve bed 12 and dynamically change along with the movement of the transverse pushing frame 211.

As shown in fig. 6,8, 9 and 10, the material disturbing plate 22 comprises an air chamber beam 221 which is fixed at the bottom end of the transverse pushing frame 211 through bolts and is in a cavity structure, the air chamber beam 221 is in a long rod shape, the length direction of the air chamber beam 221 is arranged along the inclined direction of the sieve bed 12, two air inlets 2213 are arranged at the top end of the air chamber beam 221, the two air inlets 2213 are arranged near the two ends of the length of the air chamber beam 221 in a one-to-one correspondence manner, the air inlets 2213 can be communicated with an external air pipe for introducing pressurized air flow, the bottom end of the air chamber beam 221 is provided with inserting grooves 2211 extending to the two ends along the length direction of the air chamber beam, and inserting air ports 2212 are arranged in the inserting grooves 2211; the bottom end of the air chamber beam 221 is provided with a plug-in bin 222 with a cavity structure, the top end of the plug-in bin 222 is slidably plugged and installed in a plug-in groove 2211 in a matched manner and can be fixed by bolts, the top end of the plug-in bin 222 is provided with a butt-joint air port 2221, the butt-joint air port 2221 and the plug-in air port 2212 are in a plug-in conducting state, the bottom end of the plug-in bin 222 is fixedly provided with a plurality of clusters of material disturbing brushes 2222 which are uniformly distributed at intervals along the length direction, the material disturbing brushes 2222 can be made of hard nylon materials, and the material disturbing brushes 2222 are contacted with the bed surface of the sieve bed 12; the bottom end of the plugging bin 222 is provided with air holes 2223 at the interval between any two adjacent clusters of material winding brushes.

The three screening areas on the screening bed 12 are equally divided into four slender screening channels by five evenly distributed material disturbing plates 22, and it is to be noted that the material disturbing plates 22 on the screening bed 12, which are positioned at two sides close to the two material blocking side plates 14, have a space which is relatively smaller when the material disturbing plates 22 move transversely along with the transverse pushing frame 211, and in the actual screening process, the material entering the space is negligible, but the screening is completed through the three sections of screening areas; when the device is started for actual screening operation of dry fly ash, the vibrating screen body 1 is in a vibrating state, the fly ash to be screened can be put in from the feed hopper 13, in order to avoid excessive accumulation of materials on the screen bed 12, which is close to the feed hopper 13, the materials can be put in a feeding manner by adopting external conveying equipment, the feeding frequency and the feeding amount can be adjusted according to the actual treatment condition, the screen bed 12 can be fully utilized, and the materials can be put in a continuous feeding manner; under the action of vibration, the fly ash in the feed hopper 13 automatically slides onto the sieve bed 12 and randomly enters each sieving channel, after the reciprocating transverse pushing assembly 21 is started, the transverse pushing frame 211 moves at a constant speed in a direction which is horizontally perpendicular to the material sliding direction in a reciprocating manner and drives the five material disturbing plates 22 to move in a reciprocating manner synchronously, so that the sieving channels move dynamically in the transverse direction, the randomly-thrown fly ash materials can be well separated, the local accumulation of the materials is avoided, and on one hand, the materials can be uniformly spread and spread in the transverse direction of the sieve bed 12 under the reciprocating transverse movement pushing of the material disturbing plates 22; on the other hand, the material can be disturbed and dispersed by the material disturbing plate 22 through the material disturbing brushes 2222, specifically, the fly ash can pass through the bristle gaps of the material disturbing brushes 2222 and can also pass through the separation gaps between the material disturbing brushes 2222, so that the fly ash aggregation is effectively reduced, the fly ash with corresponding particle size can be promoted to pass through the sieve holes rapidly by the material disturbed in a reciprocating manner, and the brush of the material disturbing brushes 2222 brushes the net surface of the sieve bed 12, so that the sieve holes can be cleaned, the blocking of the sieve holes is avoided, and the sieving passing efficiency is improved. It should be noted that, since the fly ash does not contact or collide with the material disturbing brush 2222 on the material disturbing plate 22 in a large area during the downward sliding process, a large amount of dust is not generated, and in addition, the generation of dust can be further reduced by controlling the moving speed of the material disturbing plate 22.

In the material disturbing plate 22, the air chamber beam 221 and the inserting bin 222 are of a detachable rapid dismounting structure, the material disturbing brush 2222 is a consumable material, and when the material disturbing brush 2222 needs to be replaced, the inserting bin 222 can be dismounted and pulled out, so that the new material disturbing brush 2222 is convenient to bond and replace; in addition, after long-time screening work, more fly ash is mixed in the bristle gaps, and the disturbance dispersion effect on the fly ash is naturally affected, so that screening can be suspended, the material disturbing plate 22 is cleaned in time, specifically, the air valve of an external pipeline is opened, pressurized air is introduced into the air chamber beam 221 and the plug-in bin 222, and then the pressurized air is sprayed out of each air spraying hole 2223, so that the material disturbing brushes 2222 on two sides can be automatically sprayed and cleaned by the sprayed pressurized air; accordingly, in this embodiment, if the fly ash is dry and contains a small amount of moisture due to improper storage and transportation, non-pressurized heated dry air may be continuously introduced into the material disturbing plate 22 during the sieving process, so that the hot air flow can be substantially uniformly dispersed on the sieve bed 12, and the fly ash is synchronously dried while the dispersed material is disturbed, so that the problems of material agglomeration, difficulty in passing through sieve holes and blocking of the sieve holes due to moisture inclusion are avoided.

As shown in fig. 1,4, 6 and 7, the intermittent stock stop 3 comprises a reciprocating assembly 31 fixedly assembled at the top end of a transverse pushing frame 211, the reciprocating assembly 31 comprises a guide frame 311, the guide frame 311 comprises two bearing seat plates 3111 welded at the upper end of the transverse pushing frame 211, the two bearing seat plates 3111 are close to two end positions arranged on the transverse pushing frame 211 in the inclined direction of the sieve bed 12 in a one-to-one correspondence manner, two serial guide rods 3112 are welded between the two bearing seat plates 3111, and the serial guide rods 3112 are axially arranged along the inclined direction of the sieve bed 12; the bearing seat plates 3111 near the lower ends are fixedly provided with driving motors 312 through bolts, the driving motors 312 are conventional forward and reverse rotation motors, a lead screw 313 is rotatably arranged between the two bearing seat plates 3111 through bearings, one end of the lead screw 313 is fixed on an output shaft of the driving motor 312, a movable frame 314 is slidably arranged between the two serial guide rods 3112, the movable frame 314 is positioned above the transverse pushing frame 211, and the movable frame 314 is in threaded connection with the lead screw 313. Three material blocking parts 32 which are all fixed between two material disturbing plates 22 are arranged in the screening passage, the three material blocking parts 32 are distributed at the separation boundary line of three screening areas in a one-to-one correspondence mode, and the three screening areas are separated from the material blocking parts 32 adjacent below in the screening passage to form three screening spaces, so that each material blocking part 32 plays a role in blocking materials in the screening area at the corresponding position, and therefore, the material blocking part 32 is specifically located at the position above the separation boundary of the screening areas, and the material blocking part 32 located at the most obliquely lower position is close to the lower end position of the screening bed 12.

As shown in fig. 7, 11, 12 and 13, the material blocking member 32 includes a main material blocking plate 321 welded between two adjacent air chamber beams 221, a plurality of material blocking plates 3212 are provided at the lower end of the main material blocking plate 321, and material passing openings are formed between two adjacent material blocking plates 3212 at intervals, so that the plurality of material blocking plates 3212 are in a grid shape; the main baffle plate 321 is provided with a through slot 3211, the main baffle plate 321 is provided with two guide grooves 3213, and the guide direction of the guide grooves 3213 is vertical to the bed surface of the sieve bed 12; the main baffle plate 321 is provided with a secondary baffle plate 323 which is arranged vertically relative to the bed surface of the sieve bed 12 in a sliding and inserting manner, a plurality of sealing laths 3231 which are inserted into a plurality of material through holes in a one-to-one correspondence manner are arranged below the secondary baffle plate 323, the sealing laths 3231 are inserted into the through slots 3211 in a penetrating manner, two sliding blocks 3232 which are in one-to-one sliding fit with the two guide grooves 3213 are arranged on the secondary baffle plate 323, the outer sides of the two guide grooves 3213 are respectively welded with a return spring 322 in a corresponding manner, the other ends of the two return springs 322 are welded at the top ends of the two sliding blocks 3232 in a one-to-one correspondence manner, and a roller 3233 is horizontally and rotatably arranged between the top ends of the two sliding blocks 3232; the two return springs 322 pull the auxiliary baffle plate 323 downwards in a natural state, the sealing lath 3231 is inserted into the material through hole to enable the material blocking part 32 to be in a closed state, and in the closed state, the lower ends of the sealing lath 3231 are aligned with the lower ends of the material blocking laths 3212 and are in contact with the surface of the sieve bed 12.

As shown in fig. 7, 11 and 14, a bulk material part 33 for disturbing materials is arranged in each screening space in a matched manner with the adjacent material blocking part 32 below, and the bulk material part 33 is fixed at the bottom end of the movable frame 314; in the process of moving the bulk material member 33 driven by the moving frame 314, when the bulk material member 33 is not in contact with the material blocking member 32, the material blocking member 32 is in a closed state, and when the bulk material member 33 is moved to be in contact with the material blocking member 32 and is closest to the material blocking member 32, the material blocking member 32 is in an open state. The bulk material part 33 comprises a matched supporting block 331 fixed at the bottom end of the movable frame 314 through bolts, a rotary supporting plate 332 which is arranged parallel to the bed surface of the sieve bed 12 is welded at the bottom end of the matched supporting block 331, a plurality of bulk material paddles 333 are rotatably arranged on the rotary supporting plate 332, paddles are distributed on the bulk material paddles 333, and bottoming balls 3331 which are in rolling contact with the bed surface of the sieve bed 12 are inlaid at the bottom end of the bulk material paddles 333. The supporting block 331 is provided with a supporting groove 3311 which is contacted with the roller 3233 when moving close; the lifting groove 3311 comprises a parallel surface which is parallel to the bed surface of the sieve bed 12 and an inclined surface which is arranged at an obtuse angle with the parallel surface, wherein the inclined surface and the parallel surface are distributed up and down and are in arc transition at the boundary; when the bulk material member 33 approaches the stopper member 32, the lifting groove 3311 extends below the roller 3233.

In the existing vibrating screen, the inclined placement angle of the screen bed 12 can be adjusted only in a certain range, and the length of the screen bed 12 is fixed, so that the material screening time is relatively limited, and the material cannot be sufficiently screened in the limited sliding screening time, and repeated screening is often required. In the device provided by the invention, on the basis of dividing the screening area into four screening channels, the screening channel is further divided into three independent screening spaces by the three material blocking parts 32 in each screening channel, the screening spaces synchronously and dynamically move along with the screening channels, but the three screening spaces are always distributed at the three screening areas in a one-to-one correspondence manner in the transverse reciprocating movement process, and the screening spaces correspond to the screening of the single-particle-grade fly ash; during screening operation, the intermittent material blocking mechanism 3 moves reciprocally along with the horizontal pushing frame 211, meanwhile, on one hand, the reciprocal moving assembly 31 drives all the bulk material components 33 to move reciprocally and uniformly along the inclined direction of the screen bed 12 in the respective screening space, and the effect is the same as that of the material disturbing plate 22, the bulk material paddles 333 perform passive irregular rotation during the process of moving and touching materials, disturbance and dispersion are performed on the materials, and the materials are promoted to pass through the screen holes; on the other hand, in the process that the bulk material part 33 longitudinally moves back and forth in the sieve bed 12 and is not contacted with the material blocking part 32, the material blocking part 32 enables the screening space where the bulk material part is located to be in a closed state, so that the screening time of the fly ash in a single screening area is greatly prolonged, the screening effect of the fly ash corresponding to the particle grade in the screening area is improved, the probability that the fly ash with smaller particle grade slides down to a next screening area is reduced, when the bulk material part 33 moves close to the material blocking part 32, the lifting groove 3311 extends to the lower part of the roller 3233 and gradually lifts the roller 3233 upwards, the auxiliary baffle plate 323 is lifted, the sealing slat 3231 is pulled out from a material passing opening of the material blocking slat 3212, in the open state, the fly ash slides down from the screening area of a previous stage to the next screening area, the fly ash also has the effect of dispersing the material from the material passing opening, when the bulk material part 33 moves away from the material blocking part 32, the lifting groove 3311 is gradually separated from the roller 3233, the auxiliary baffle plate 322 is under the elastic force of the reset spring, and the material blocking plate 323 is required to slide down to the material blocking part 32 again to the uppermost screening area before the material blocking part 32 is required to be closed again.

As shown in fig. 15, the invention further provides a dry fly ash recovery treatment method, which specifically comprises the following steps: s1, starting the processing device provided by the invention to enable the processing device to be in a working state.

S2, conveying and throwing dry fly ash into the device through external conveying equipment.

S3, the fly ash is dispersed into a screening channel, and is screened step by step in a plurality of screening spaces of the screening channel.

S4, respectively transferring and conveying the multi-stage dry fly ash obtained by screening, and independently stacking and storing.

The invention provides a dry-type fly ash recovery processing device, which adopts the structural design of single-screen plate and multiple-screen-area, is more compact, meets the requirement of multi-level screening, and simultaneously greatly avoids the problem of a large amount of dust emission in the process of screening and gradually blanking the fly ash by a plate-type vibrating screen with a multi-layer screen plate structure; through the cooperation setting of horizontal pushing disturbance material mechanism 2 and intermittent type stock stop 3 of assembly, further separate the screening space that forms dynamic movement thereupon on separating the basis that forms the screening passageway, in screening process, can carry out abundant disturbance dispersion to the fly ash for the material dispersion tiling avoids local piling up, also weakens the agglomeration effect of fly ash greatly, can clear up the sieve mesh in step, and promote the material to pass through the sieve mesh fast, in addition, prolonged the screening time of fly ash in single screening subregion, improved the sufficiency of screening, avoided the repeated screening of material, improved the treatment effeciency that the fly ash was retrieved in screening greatly.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The preferred embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, wherein devices and structures not described in detail are to be understood as being implemented in a manner common in the art; any person skilled in the art will make many possible variations and modifications, or adaptations to equivalent embodiments without departing from the technical solution of the present invention, which do not affect the essential content of the present invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A dry-type fly ash recovery processing device is characterized in that: comprising a vibrating screen body (1), the vibrating screen body (1) comprising a screen bed (12) mounted in an inclined arrangement; a transverse pushing and disturbing mechanism (2) is arranged above the bed surface of the sieve bed (12), and an intermittent material blocking mechanism (3) is arranged on the transverse pushing and disturbing mechanism (2) in a matched mode; wherein:

the sieve bed (12) is provided with a plurality of sections of sieve areas with sieve mesh sizes from small to large in sequence from top to bottom along the inclined direction;

The transverse pushing and disturbing mechanism (2) comprises a reciprocating transverse pushing assembly (21), and the reciprocating transverse pushing assembly (21) comprises a transverse pushing frame (211) which is horizontally arranged in a reciprocating sliding driving manner in the width direction of the sieve bed (12); a plurality of material disturbing plates (22) which are sequentially and uniformly distributed along the moving direction of the material disturbing plates are fixed at the bottom end of the transverse pushing frame (211); two adjacent material disturbing plates (22) are separated to form a screening channel which flows along the inclined direction of the screening bed (12) and dynamically changes along with the movement of the transverse pushing frame (211);

The intermittent stock stop (3) comprises a reciprocating assembly (31), and the reciprocating assembly (31) comprises a moving frame (314) which is arranged in a reciprocating manner along the inclination direction of the sieve bed (12); a plurality of material blocking parts (32) which are all fixed between two material disturbing plates (22) are arranged in the screening channel, the material blocking parts (32) are distributed at the separation boundary line of a plurality of sections of screening areas in a one-to-one correspondence manner, the screening areas are separated from the material blocking parts (32) adjacent below in the screening channel to form a plurality of screening spaces, the material blocking parts (32) adjacent below in each screening space are matched with the material scattering parts (33) for disturbing materials, and the material scattering parts (33) are fixed at the bottom end of the movable frame (314); when the bulk material part (33) is not contacted with the material blocking part (32), the material blocking part (32) is in a closed state, and when the bulk material part (33) moves to be contacted with the material blocking part (32) and is nearest to the material blocking part (32), the material blocking part (32) is in an open state.

2. The dry fly ash recovery processing device according to claim 1, wherein: the material disturbing plate (22) comprises an air chamber beam (221) which is fixed at the bottom end of the transverse pushing frame (211) and is in a cavity structure, a plug-in bin (222) which is in a cavity structure is fixedly arranged at the bottom end of the air chamber beam (221) in a plug-in fit manner, and the cavities of the plug-in bin (222) and the air chamber beam (221) are in a communication state; a plurality of clusters of material disturbing brushes (2222) are fixed at the bottom end of the plug-in bin (222) and are distributed at intervals along the length direction, and the material disturbing brushes (2222) are contacted with the bed surface of the sieve bed (12); air injection holes (2223) are formed in the bottom end of the inserting bin (222) at intervals of any two adjacent clusters of winding brushes.

3. The dry fly ash recovery processing device according to claim 2, wherein: the material blocking component (32) comprises a main material blocking plate (321) fixed between two adjacent air chamber beams (221), a plurality of material blocking strips (3212) are arranged at the lower end of the main material blocking plate (321), and material passing openings are formed between the two adjacent material blocking strips (3212) at intervals; a secondary baffle plate (323) which is arranged vertically relative to the bed surface of the sieve bed (12) is arranged on the main baffle plate (321) in a sliding insertion manner, and at least one reset spring (322) is connected between the secondary baffle plate (323) and the main baffle plate (321); a plurality of sealing laths (3231) which are inserted in a plurality of material through holes in a one-to-one correspondence manner to form a closed state are arranged below the auxiliary baffle plate (323).

4. A dry fly ash recovery processing apparatus according to claim 3, wherein: the bulk cargo part (33) comprises a matched supporting block (331) fixed at the bottom end of the movable frame (314), a rotary supporting plate (332) which is parallel to the bed surface of the sieve bed (12) is fixed at the bottom end of the matched supporting block (331), and a plurality of bulk cargo paddles (333) are rotatably arranged on the rotary supporting plate (332).

5. The dry fly ash recovery processing device according to claim 4, wherein: the top end of the auxiliary striker plate (323) is horizontally and rotatably provided with a roller (3233); a lifting groove (3311) which is contacted with the roller (3233) when moving close is arranged on the matched supporting block (331); the lifting groove (3311) comprises a parallel surface which is arranged in parallel with the bed surface of the sieve bed (12) and an inclined surface which is arranged at an obtuse angle with the parallel surface, wherein the inclined surface is distributed up and down with the parallel surface and is in arc transition at a demarcation point; when the bulk material part (33) approaches to the material blocking part (32), the lifting groove (3311) extends to the lower part of the roller (3233).

6. A dry fly ash recovery processing apparatus according to claim 3, wherein: when the material blocking part (32) is in a closed state, the lower ends of the sealing laths (3231) are aligned with the lower ends of the material blocking laths (3212) and are in contact with the surface of the sieve bed (12).

7. The dry fly ash recovery processing device according to claim 2, wherein: the bottom end of the air chamber beam (221) is provided with a plug groove (2211) extending to two ends along the length direction of the air chamber beam, and a plug air port (2212) is arranged in the plug groove (2211); the top end of the plug-in bin (222) is plugged in the plug-in groove (2211), a butt-joint air port (2221) is formed in the top end of the plug-in bin (222), and the butt-joint air port (2221) and the plug-in air port (2212) are in a plug-in conduction state.

8. The dry fly ash recovery processing device according to claim 5, wherein: a through slot (3211) is formed in the main striker plate (321), and two guide grooves (3213) are formed in the main striker plate (321); the sealing strip plate (3231) is inserted into the through slot (3211) in a penetrating mode, two sliding blocks (3232) in one-to-one sliding fit with the two guide grooves (3213) are arranged on the auxiliary material blocking plate (323), and the roller (3233) is rotatably arranged between the top ends of the two sliding blocks (3232).

9. The dry fly ash recovery processing device according to claim 1, wherein: the blanking collection bin (15) is fixed at the bottom end of the sieve bed (12), and the separation positions of a plurality of sieve areas in the blanking collection bin (15) are correspondingly arranged at intervals.

10. The dry fly ash recovery processing device according to claim 1, wherein: the process for recycling the dry fly ash by the dry fly ash recycling device specifically comprises the following steps:

S1, starting the dry fly ash recovery treatment device to enable the dry fly ash recovery treatment device to be in a working state;

s2, conveying and throwing dry fly ash into the device through external conveying equipment;

S3, the fly ash is dispersed into a screening channel, and is screened step by step in a plurality of screening spaces of the screening channel;

S4, respectively transferring and conveying the multi-stage dry fly ash obtained by screening, and independently stacking and storing.