CN221452518U - Aluminum ash feeding and dust disposal device - Google Patents

Abstract

The utility model discloses an aluminum ash feeding and dust-raising treatment device, which belongs to the technical field of solid waste recycling, and the technical scheme is characterized by comprising a screening box, wherein a feeding hole is formed in the top of the screening box, a coarse screening component and a middle screening component are respectively arranged at the top and the bottom of the inside of the screening box, a coarse blanking pipe is communicated with the top of the left side of the screening box, and the screened coarse material and the medium material are discharged through the coarse blanking pipe and the medium blanking pipe by arranging the screening box, the coarse screening component, the medium blanking pipe, the powder suction component, the dust treatment component, the coarse scraping component and the medium scraping component.

Description

Aluminum ash feeding and dust disposal device

Technical Field

The utility model relates to the technical field of solid waste recycling, in particular to an aluminum ash feeding and dust disposal device.

Background

The technology for preparing polyaluminium chloride from aluminum ash uses aluminum ash and industrial hydrochloric acid as main raw materials to make dissolution reaction, uses quick lime, calcium aluminate or aluminum ash as regulator to regulate liquid basicity so as to obtain the invented qualified polyaluminium chloride product.

In the existing process of preparing polyaluminium chloride from aluminum ash, as the aluminum ash is defined widely, aluminum ash produced by enterprises in various solid wastes is not finely classified, various different materials exist in the aluminum ash, wherein the difference of active ingredients is large, the materials are required to be further screened, the smooth progress of the reaction is ensured, a single-layer small-aperture filter screen is arranged above a reaction kettle for filtering, the materials are not finely divided, the large-block materials are generally primary aluminum ash with high aluminum content, the polyaluminium chloride is prepared relatively wastefully, and the silicon-calcium inorganic components in the fine materials are high, the aluminum content is low, and the reactivity is poor.

Disclosure of utility model

The utility model provides an aluminum ash feeding and dust disposal device, which aims to solve the problems that in the existing aluminum ash preparation process, aluminum ash definition is relatively wide, aluminum ash generated by enterprises does not finely classify various solid wastes, various different materials exist in the aluminum ash, wherein the difference of active ingredients is large, the materials are required to be further screened to ensure smooth reaction, a single-layer small-aperture filter screen is arranged above a reaction kettle for filtering, the material is not finely divided, the larger massive materials are generally primary aluminum ash with higher aluminum content, the prepared aluminum polychloride is relatively wasted, the silicon-calcium inorganic components in the thinner materials are higher, the aluminum content is lower, and the reactivity is poor, so the aluminum ash feeding and dust disposal device is provided to solve the problems.

The utility model discloses an aluminum ash feeding and dust disposal device, which comprises a screening box, wherein a feeding hole is formed in the top of the screening box, a coarse screen component and a middle screen component are respectively arranged at the top and the bottom of the inside of the screening box, a coarse blanking pipe is communicated with the top of the left side of the screening box, a middle blanking pipe is communicated with the bottom of the right side of the screening box, a powder suction component is arranged on the right side of the screening box, a dust disposal component is arranged on the right side of the powder suction component, a coarse scraping component and a middle scraping component are respectively arranged on the left side and the right side of the inside of the screening box, the coarse scraping component and the middle scraping component are respectively positioned on the surfaces of the coarse screen component and the middle screen component, and a vibrating pump is connected to both sides of the screening box in a bolting mode;

The dust treatment assembly comprises a bag-type dust collector, a discharge plate and a cloth bag, wherein the left side of the bag-type dust collector is communicated with the right side of the dust suction assembly, the discharge plate is arranged at the top of the inside of the bag-type dust collector, the right side of the discharge plate penetrates through the right side of the inside of the bag-type dust collector, and the cloth bag is arranged at the bottom of the discharge plate and is communicated with the bottom of the discharge plate.

In order to achieve the effect of carrying out coarse screening on the aluminum ash raw material, the aluminum ash feeding and dust-raising treatment device is preferably adopted, the coarse screening assembly comprises a first fixed plate, first spring columns and a coarse screen, wherein the first fixed plate is respectively bolted to two sides of the inside of the screening box, the first spring columns are respectively bolted to the front side and the rear side of the top of the first fixed plate, and the coarse screen is bolted to the top of the first spring columns.

In order to achieve the effect of using the middle screen on the aluminum ash raw material, the aluminum ash feeding and dust-raising treatment device is preferably adopted, the middle screen assembly comprises a second fixed plate, second spring columns and a middle screen, the second fixed plate is respectively bolted to two sides of the inside of the screening box, the second spring columns are respectively bolted to the front side and the rear side of the top of the second fixed plate, and the middle screen is bolted to the top of the second spring columns.

In order to achieve the effect of absorbing scattered dust generated when the aluminum ash raw materials are screened in the screening box, the aluminum ash feeding and dust-raising treatment device is preferably adopted, the dust absorbing assembly comprises a three-way dust absorbing pipe, a dust absorbing fan and a discharge pipe, the top and the bottom of the left side of the three-way dust absorbing pipe are respectively communicated with the top and the bottom of the right side of the screening box, the absorbing end of the dust absorbing fan is communicated with the bottom of the three-way dust absorbing pipe, the left side of the discharge pipe is communicated with the output end of the dust absorbing fan, and the right side of the discharge pipe is communicated with the left side of the bag-type dust collector.

In order to achieve the effect of cleaning and scraping the surface of the coarse screen assembly, the aluminum ash feeding and dust-raising treatment device is preferably adopted, the coarse screen assembly comprises a first electric push rod and a first scraping plate, the first electric push rod is bolted to the top of the right side of the screening box, the telescopic end of the first electric push rod penetrates through the right side of the screening box, the first scraping plate is bolted to the telescopic end of the first electric push rod, and the bottom of the first scraping plate is in contact with the surface of the coarse screen.

In order to achieve the effect of cleaning and scraping the surface of the middle screen assembly, as an aluminum ash feeding and dust-raising treatment device, the middle screen assembly preferably comprises a second electric push rod and a second scraping plate, wherein the second electric push rod is bolted to the bottom of the left side of the screening box, the telescopic end of the second electric push rod penetrates through the left side of the screening box, the second scraping plate is bolted to the telescopic end of the second electric push rod, and the bottom of the second scraping plate is in contact with the surface of the middle screen.

In order to achieve the effect of collecting the falling fine materials after the aluminum ash raw materials are screened, the aluminum ash feeding and dust-raising treatment device is preferably adopted, the bottom of the screening box is communicated with a fine material collecting hopper, and the fine material collecting hopper is in a funnel shape.

In order to achieve the effect of collecting and using the cleaned dust after entering the bag-type dust collector, the aluminum ash feeding and dust-raising treatment device is preferably adopted, dust collection hoppers are communicated with two sides of the bottom of the bag-type dust collector, and the dust collection hoppers are funnel-shaped.

Compared with the prior art, the utility model has the beneficial effects that:

This aluminum ash feeding and raise dust processing apparatus through setting up screening case, coarse screening subassembly, well screening subassembly, thick unloading pipe, well unloading pipe, inhale the powder subassembly, dust handling subassembly, rough scraping subassembly and well scraping subassembly, during the use, the user will need the aluminium ash raw materials of screening processing to add through the feed inlet at screening case top, then open the vibrating pump that is located screening case both sides simultaneously, then the aluminium ash raw materials is accomplished the screening to coarse fodder and well material through the surface of coarse screening subassembly and well screening subassembly in proper order, thereby make the fine material drop to the inside bottom side of screening case, and coarse fodder and well material that is sieved are discharged through coarse unloading pipe and well unloading pipe, and simultaneously start inhaling the powder subassembly and will float the dust of screening incasement portion and adsorb, then discharge to the inside of sack cleaner, and then realize the filtration to the dust through sack cooperation discharge plate, make the dust adsorb at the sack surface, and the wind that blows out is discharged through discharge plate, so as to realize screening filtration and the two aspect functions of aluminium ash raw materials and the processing, and realize the source is complicated, the large content of material is good quality, the difference is carried out in the aluminium ash raw materials and the screen material, and the well has been scraped the coarse screening subassembly and has been realized in the coarse screening subassembly and has been carried out the clean and has been guaranteed the difference when the coarse screening subassembly has been used to the coarse screening subassembly and has been further to the coarse screening.

Drawings

FIG. 1 is an overall block diagram of an aluminum ash feed and dust handling apparatus of the present utility model;

FIG. 2 is an exploded view of the screening box of the present utility model;

FIG. 3 is a schematic view of the structure of the coarse screen assembly of the present utility model;

FIG. 4 is a schematic view of the structure of a middle screen assembly of the present utility model;

FIG. 5 is a schematic view of a powder suction assembly according to the present utility model;

FIG. 6 is a schematic view of a dust handling assembly according to the present utility model;

FIG. 7 is a schematic view of a rough scraping assembly according to the present utility model;

fig. 8 is a schematic structural view of the wiper assembly according to the present utility model.

In the figure, 1, a screening box; 2. a feed hole; 3. a coarse screen assembly; 301. a first fixing plate; 302. a first spring post; 303. coarse screen; 4. a middle screen assembly; 401. a second fixing plate; 402. a second spring post; 403. a middle screen; 5. a coarse blanking pipe; 6. a middle blanking pipe; 7. a powder suction component; 701. a three-way dust collection pipe; 702. a dust collection fan; 703. a discharge pipe; 8. a dust handling assembly; 801. a bag-type dust collector; 802. a discharge plate; 803. a cloth bag; 9. a rough scraping assembly; 901. a first electric push rod; 902. a first scraping plate; 10. a middle scraping assembly; 1001. a second electric push rod; 1002. a second scraping plate; 11. a vibration pump; 12. a fines collection hopper; 13. and a dust collection hopper.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify 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 therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1-8, the present utility model provides the following technical solutions: the utility model provides an aluminium ash feeding and raise dust processing apparatus, including screening case 1, feed port 2 has been seted up at screening case 1's top, screening case 1 inside top and bottom are provided with coarse screen subassembly 3 and well screen subassembly 4 respectively, screening case 1 left top intercommunication has coarse blanking pipe 5, screening case 1 right bottom intercommunication has well blanking pipe 6, screening case 1's right side is provided with powder suction subassembly 7, powder suction subassembly 7's right side is provided with dust disposal subassembly 8, screening case 1 inside left side and right side are provided with coarse scraping subassembly 9 and well scraping subassembly 10 respectively, coarse scraping subassembly 9 and well scraping subassembly 10 are located the surface of coarse screen subassembly 3 and well screen subassembly 4 respectively, the both sides of screening case 1 all bolt vibrating pump 11;

The dust handling assembly 8 comprises a bag-type dust collector 801, a discharge plate 802 and a cloth bag 803, wherein the left side of the bag-type dust collector 801 is communicated with the right side of the dust absorbing assembly 7, the discharge plate 802 is arranged at the top of the inside of the bag-type dust collector 801, the right side of the discharge plate 802 penetrates through the right side of the inside of the bag-type dust collector 801, and the cloth bag 803 is arranged at the bottom of the discharge plate 802 and communicated with the bottom of the bag-type dust collector.

In this embodiment: through the arrangement of the screening box 1, the coarse screening component 3, the middle screening component 4, the coarse blanking pipe 5, the middle blanking pipe 6, the powder suction component 7, the dust treatment component 8, the coarse scraping component 9 and the middle scraping component 10, when in use, a user adds the aluminum ash raw materials needing screening treatment through the feeding holes 2 at the top of the screening box 1, then simultaneously starts the vibrating pumps 11 at two sides of the screening box 1, and then sequentially screens coarse materials and middle materials through the surfaces of the coarse screening component 3 and the middle screening component 4, so that fine materials fall to the bottom side inside the screening box 1, the screened coarse materials and middle materials are discharged through the coarse blanking pipe 5 and the middle blanking pipe 6, and at the same time, the powder suction component 7 is started to adsorb dust scattered inside the screening box 1, then arrange to the inside of sack cleaner 801, and then realize the filtration to the dust through sack 803 cooperation drain board 802, make the dust adsorb at sack 803 surface, and the wind that blows out is discharged through drain board 802, so realize sieving filtration to the aluminium ash raw materials and the dust treatment two aspects function of giving off, and realize having very big difference to the source complicacy, material property, ingredient content's aluminium ash filters, guarantee that the reaction goes on smoothly in the reation kettle, the dust dissipation problem has been solved simultaneously, the environmental protection effect is showing, and follow-up still can realize scraping clean to the surface of coarse screen subassembly 3 and well screen subassembly 4 in coarse screen subassembly 9 and well screen subassembly 10, so guarantee the fluxion of coarse screen subassembly 3 and well screen subassembly 4 when using, and then convenient to use's use.

As a technical optimization scheme of the utility model, the coarse screen assembly 3 comprises a first fixed plate 301, first spring columns 302 and coarse screen 303, wherein the first fixed plate 301 is respectively bolted to two sides of the interior of the screening box 1, the first spring columns 302 are respectively bolted to the front side and the rear side of the top of the first fixed plate 301, and the coarse screen 303 is bolted to the top of the first spring columns 302.

In this embodiment: through setting up first fixed plate 301, first spring post 302 and coarse screen 303, during the use, the user will need the aluminium ash raw materials of screening processing to add through the feed port 2 at screening case 1 top, then start the vibrating pump 11 that is located screening case 1 both sides simultaneously, then after aluminium ash raw materials is in the surface of coarse screen 303, its coarse screen 303 receives vibrating pump 11 and aluminium ash raw materials impact's production, consequently produce the vibration under the effect of first spring post 302 at first fixed plate 301 top, thereby realize the coarse screen use to aluminium ash raw materials, then coarse fodder that does not pass through coarse screen 303 is discharged through coarse blanking pipe 5.

As a technical optimization scheme of the utility model, the middle screen assembly 4 comprises a second fixed plate 401, second spring columns 402 and a middle screen 403, wherein the second fixed plate 401 is respectively bolted to two sides of the interior of the screening box 1, the second spring columns 402 are respectively bolted to the front side and the rear side of the top of the second fixed plate 401, and the middle screen 403 is bolted to the top of the second spring columns 402.

In this embodiment: by arranging the second fixed plate 401, the second spring column 402 and the middle screen 403, after the aluminum ash raw material passes through the coarse screen 303, the aluminum ash raw material falls onto the surface of the middle screen 403, and then when the screen 403 is impacted by the vibration pump 11 and the aluminum ash raw material, the aluminum ash raw material vibrates under the action of the first spring column 302 at the top of the first fixed plate 301, so that the middle screen of the aluminum ash raw material is used, and then the middle material which does not pass through the coarse screen 303 is discharged through the middle discharging pipe 6.

As a technical optimization scheme of the utility model, the powder suction assembly 7 comprises a three-way dust suction pipe 701, a dust suction fan 702 and a discharge pipe 703, wherein the top and the bottom of the left side of the three-way dust suction pipe 701 are respectively communicated with the top and the bottom of the right side of the screening box 1, the suction end of the dust suction fan 702 is communicated with the bottom of the three-way dust suction pipe 701, the left side of the discharge pipe 703 is communicated with the output end of the dust suction fan 702, and the right side of the discharge pipe 703 is communicated with the left side of the bag-type dust collector 801.

In this embodiment: through setting up tee bend dust absorption pipe 701, dust absorption fan 702 and discharge pipe 703, when coarse screen 303 and well screen 403 carry out screening treatment to the aluminium ash raw materials, the dust that the simultaneous start dust absorption fan 702 cooperation tee bend dust absorption pipe 701 will fly away in screening case 1 inside adsorbs, then carries out subsequent processing to the inside of sack cleaner 801 through discharge pipe 703 row.

As a technical optimization scheme of the utility model, the rough scraping assembly 9 comprises a first electric push rod 901 and a first scraping plate 902, wherein the first electric push rod 901 is bolted to the top of the right side of the screening box 1, the telescopic end of the first electric push rod 901 penetrates through the right side of the screening box 1, the first scraping plate 902 is bolted to the telescopic end of the first electric push rod 901, and the bottom of the first scraping plate 902 is in contact with the surface of the rough screen 303.

In this embodiment: through setting up first electric putter 901 and first scraping plate 902, follow-up suspension or stop use the screening of aluminium ash raw materials, promote first scraping plate 902 through the first electric putter 901 on the start screening case 1 right side and realize scraping the clearance to the coarse screen 303 surface to guarantee the fluxion of coarse screen 303 when using.

As a technical optimization scheme of the utility model, the middle scraping assembly 10 comprises a second electric push rod 1001 and a second scraping plate 1002, wherein the second electric push rod 1001 is bolted to the bottom of the left side of the screening box 1, the telescopic end of the second electric push rod 1001 penetrates through the left side of the screening box 1, the second scraping plate 1002 is bolted to the telescopic end of the second electric push rod 1001, and the bottom of the second scraping plate 1002 is in contact with the surface of the middle screen 403.

In this embodiment: through setting up second electric putter 1001 and second scraper 1002 to and follow-up pause or stop to sieve the use to the aluminium ash raw materials, promote second scraper 1002 through the second electric putter 1001 of starting screening case 1 left side and realize scraping the clearance to the surface of centering screen 403, thereby guarantee the fluxion of well screen 403 when using, and then convenient to use's use.

As the technical optimization scheme of the utility model, the bottom of the screening box 1 is communicated with a fine material collecting hopper 12, and the fine material collecting hopper 12 is funnel-shaped.

In this embodiment: through setting up the fine material and collecting the fill 12, can realize collecting the effect of whereabouts fine material behind the screening of aluminium ash raw materials to increase the practicality.

As a technical optimization scheme of the utility model, two sides of the bottom of the bag-type dust collector 801 are communicated with a dust collection hopper 13, and the dust collection hopper 13 is funnel-shaped.

In this embodiment: through setting up dust collection hopper 13, can realize collecting the effect of use to the dust that gets into the sack cleaner 801 after being cleared up to increase the practicality.

Working principle: firstly, when in use, the aluminum ash raw material to be screened is added through the feeding holes 2 at the top of the screening box 1, then the vibrating pumps 11 at the two sides of the screening box 1 are started simultaneously, then when the aluminum ash raw material is positioned on the surface of the coarse screen 303, the coarse screen 303 is impacted by the vibrating pumps 11 and the aluminum ash raw material, so that vibration is generated under the action of the first spring columns 302 at the top of the first fixed plate 301, the coarse screen of the aluminum ash raw material is used, coarse material which does not pass through the coarse screen 303 is discharged through the coarse blanking pipe 5, the aluminum ash raw material which passes through the coarse screen 303 falls to the surface of the middle screen 403, and then the screen 403 also vibrates under the action of the first spring columns 302 at the top of the first fixed plate 301 when being impacted by the vibrating pumps 11 and the aluminum ash raw material, so that the middle screen of the aluminum ash raw material is used, then the middle material which does not pass through the coarse screen 303 is discharged through the middle blanking pipe 6, meanwhile, when the coarse screen 303 and the middle screen 403 screen aluminum ash raw materials, a dust suction fan 702 is started simultaneously to absorb dust which drifts in the screening box 1 by matching with a three-way dust suction pipe 701, then the dust is discharged into a cloth bag dust remover 801 through a discharge pipe 703, then the dust is filtered by matching with a discharge plate 802 through a cloth bag 803, so that the dust is absorbed on the surface of the cloth bag 803, and blown air is discharged through the discharge plate 802, thereby realizing the functions of screening and filtering aluminum ash raw materials and dust treatment, then the screening of aluminum ash raw materials is stopped or stopped, the first scraping plate 902 is pushed by starting a first electric push rod 901 on the right side of the screening box 1 to realize scraping and cleaning of the surface of the coarse screen 303, and a second electric push rod 1001 at the left side of the screening box 1 is started to push a second scraping plate 1002 to scrape and clean the surface of the middle screen 403, so that the fluidity of the coarse screen 303 and the middle screen 403 in use is ensured.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. The utility model provides an aluminium ash feeding and raise dust processing apparatus, includes screening case (1), its characterized in that: feed port (2) have been seted up at the top of screening case (1), inside top and the bottom of screening case (1) are provided with coarse screen subassembly (3) and well sieve subassembly (4) respectively, the left top intercommunication of screening case (1) has coarse blanking pipe (5), the bottom intercommunication on screening case (1) right side has well blanking pipe (6), the right side of screening case (1) is provided with powder suction subassembly (7), the right side of powder suction subassembly (7) is provided with dust disposal subassembly (8), the inside left side of screening case (1) is provided with coarse scraping subassembly (9) and well scraping subassembly (10) respectively with the right side, coarse scraping subassembly (9) and well scraping subassembly (10) are located the surface of coarse screen subassembly (3) and well sieve subassembly (4) respectively, vibration pump (11) have all been connected to the both sides of screening case (1);

The dust treatment assembly (8) comprises a bag-type dust collector (801), a discharge plate (802) and a bag (803), wherein the left side of the bag-type dust collector (801) is communicated with the right side of the dust suction assembly (7), the discharge plate (802) is arranged at the top of the inside of the bag-type dust collector (801), the right side of the discharge plate (802) penetrates through the right side of the inside of the bag-type dust collector (801), and the bag (803) is arranged at the bottom of the discharge plate (802) and is communicated with the bottom of the bag-type dust collector.

2. An aluminum ash feed and dust disposal apparatus according to claim 1, wherein: the coarse screen assembly (3) comprises a first fixed plate (301), first spring columns (302) and coarse screens (303), wherein the first fixed plate (301) is respectively bolted to two sides of the inside of the screening box (1), the first spring columns (302) are respectively bolted to the front side and the rear side of the top of the first fixed plate (301), and the coarse screens (303) are bolted to the top of the first spring columns (302).

3. An aluminum ash feed and dust disposal apparatus according to claim 1, wherein: the middle screen assembly (4) comprises a second fixed plate (401), second spring columns (402) and a middle screen (403), wherein the second fixed plate (401) is respectively bolted to two sides of the inside of the screening box (1), the second spring columns (402) are respectively bolted to the front side and the rear side of the top of the second fixed plate (401), and the middle screen (403) is bolted to the top of the second spring columns (402).

4. An aluminum ash feed and dust disposal apparatus according to claim 1, wherein: the dust suction assembly (7) comprises a three-way dust suction pipe (701), a dust suction fan (702) and a discharge pipe (703), wherein the top and the bottom of the left side of the three-way dust suction pipe (701) are respectively communicated with the top and the bottom of the right side of the screening box (1), the suction end of the dust suction fan (702) is communicated with the bottom of the three-way dust suction pipe (701), the left side of the discharge pipe (703) is communicated with the output end of the dust suction fan (702), and the right side of the discharge pipe (703) is communicated with the left side of the bag-type dust collector (801).

5. An aluminum ash feed and dust disposal apparatus according to claim 2, wherein: the rough scraping assembly (9) comprises a first electric push rod (901) and a first scraping plate (902), wherein the first electric push rod (901) is bolted to the top of the right side of the screening box (1), the telescopic end of the first electric push rod (901) penetrates through the right side of the screening box (1), the first scraping plate (902) is bolted to the telescopic end of the first electric push rod (901), and the bottom of the first scraping plate (902) is in contact with the surface of the rough screen (303).

6. An aluminum ash feed and dust disposal apparatus according to claim 3, wherein: the middle scraping assembly (10) comprises a second electric push rod (1001) and a second scraping plate (1002), the second electric push rod (1001) is bolted to the bottom of the left side of the screening box (1), the telescopic end of the second electric push rod (1001) penetrates through the left side of the screening box (1), the second scraping plate (1002) is bolted to the telescopic end of the second electric push rod (1001), and the bottom of the second scraping plate (1002) is in contact with the surface of the middle screen (403).

7. An aluminum ash feed and dust disposal apparatus according to claim 1, wherein: the bottom of the screening box (1) is communicated with a fine material collecting hopper (12), and the fine material collecting hopper (12) is funnel-shaped.

8. An aluminum ash feed and dust disposal apparatus according to claim 1, wherein: both sides of the bottom of the bag-type dust collector (801) are communicated with dust collection hoppers (13), and the dust collection hoppers (13) are funnel-shaped.