CN219273696U - Air supply system for powder tail separation - Google Patents

Abstract

The application relates to an air supply system of powder tail selection relates to the technical field of cement production, including frame and selection powder machine, offered coarse powder discharge gate and fine powder discharge gate on the selection powder machine, be provided with air supply mechanism in the frame, air supply mechanism includes air supply case, blast pipe and heating element. The suction pump starts in pumping air to the bellows, heating element starts heats the air, open the blast gate, the gaseous air of heating gets into the selection powder machine through the blast pipe in, add the selection powder machine with the material in, adjust the size of blast gate and screen the material, the gaseous stoving of material that heats simultaneously, the coarse powder discharge gate after the screening is discharged, fine powder and heating gas are discharged from the fine powder discharge gate, through drying and preheating in the selection by winnowing, need not to establish preheating device in addition, thereby the process time of cement manufacture has been practiced thrift, therefore, cement manufacture's efficiency has been improved.

Description

Air supply system for powder tail separation

Technical Field

The application relates to the technical field of cement production, in particular to an air supply system for powder tail selection.

Background

The cement is a powder hydraulic, which is made up by adding water, can be hardened in air or water, and can firmly combine sand, stone and other materials together.

In the powder sorting stage, screening is usually carried out by means of a powder sorter and an air sorting mode, a plurality of inclined sorting plates are arranged in the powder sorter, powder falls on the sorting plates from a feeding hole, air is supplied to the interior of the powder sorter, materials with large particle sizes are selected by the aid of the size of wind force, the materials with large particle sizes fall out from an outlet below the powder sorter, and the gas mixed with fine powder is discharged from an air outlet of the powder sorter for secondary sorting, so that tail sorting of the powder is realized.

The selected powder firstly needs to remove water through a preheating device and enter a kiln for calcination after being preheated, so that the calcination effect is improved; but the separate arrangement of the preheating device prolongs the working procedure time of cement production, thereby reducing the efficiency of cement production.

Disclosure of Invention

In order to improve the efficiency of cement manufacture, this application provides the air supply system of powder tail selection.

The application provides an air supply system of powder tail selection adopts following technical scheme:

the utility model provides an air supply system that powder tail was selected, includes the frame and sets up the selection powder machine in the frame, coarse powder discharge gate and fine powder discharge gate have been seted up on the selection powder machine, be provided with air supply mechanism in the frame, air supply mechanism includes:

the air supply box is arranged on the rack and used for temporarily storing air, and a suction pump used for sucking air is arranged on the air supply box;

the air supply pipe is arranged on the air supply box, is communicated with the powder selecting machine and is used for conveying gas, and an air supply valve for controlling opening and closing is arranged on the air supply pipe;

and the heating assembly is arranged on the air feeding box and is used for heating air.

Through adopting above-mentioned technical scheme, suction pump starts in air suction to the air-feeding case, heating element starts heats air, open the air supply valve, the gaseous selection powder machine that gets into of heating passes through the blast pipe, add the material to the selection powder machine in, adjust the size of air supply valve and screen the material, the gaseous stoving of material is carried out to the while heating, coarse powder discharge gate discharge after the screening, fine powder and heating gas are discharged from the fine powder discharge gate, through drying and preheating in the selection by winnowing, need not to establish preheating device in addition, thereby the process time of cement manufacture has been practiced thrift, therefore, cement manufacture's efficiency has been improved.

Optionally, the heating assembly includes:

the heating plate is arranged on the air supply box, and an air supply space through which air passes is formed between the heating plate and the air supply box;

the electric heating tube is arranged on the heating plate and used for heating air;

and the temperature sensor is arranged on the air feeding box and is used for detecting the air temperature.

Through adopting above-mentioned technical scheme, the electrothermal tube starts, and air gets into in the air feed case under the effect of suction pump to get into the blast pipe after passing through the space of supplying air, temperature sensor detects the temperature of air, makes the stoving and the preheating of different materials of air temperature adaptation after the electrothermal tube heating, with this heating of realization to the air, thereby improved the convenience that the air was dried and preheated the material, need not to follow-up preheating device in addition, thereby practiced thrift the process time of cement production, consequently improved cement production's efficiency.

Optionally, be provided with the circulation subassembly that is used for circulating kiln steam in the frame, circulation subassembly includes:

the circulating box is arranged on the rack and is used for temporarily storing hot air generated by the kiln;

the circulating pipe is arranged on the circulating box and connected with the air supply pipe, and a circulating valve for controlling opening and closing is arranged on the circulating pipe.

Through adopting above-mentioned technical scheme, when kiln operation produced hot air, the hot-blast collection of kiln production was carried out to the circulation case, closed air supply valve, opened the circulation valve, and hot-blast entering powder concentrator behind the blast pipe through the circulation pipe is through the kiln hot-blast, carries out selection by winnowing, stoving and preheating the material, has not only practiced thrift the process time of cement production, has improved cement production's efficiency, has practiced thrift the energy simultaneously, has reduced the waste of kiln hot-blast.

Optionally, set up horizontal mounting hole on the circulation case, the last slip of mounting hole is provided with the filtration steamer tray, the filtration steamer tray is located the circulation pipe top and is arranged in filtering the particulate matter in the kiln hot air, be provided with the locating component that is used for carrying out the location to the filtration steamer tray on the circulation case.

Through adopting above-mentioned technical scheme, kiln hot air has partial dust, and the hot-blast of mixed dust filters through filtering the steamer tray, and hot-blast entering circulating pipe behind the filtering steamer tray, and the dust is held back by the filtering steamer tray to reduce the dust and mix the probability that causes the jam to the selection powder machine vent in hot-blast, with this effect that improves selection by winnowing and stoving, open locating component, remove the filtering steamer tray and break away from installation Kong Jineng and concentrate the clearance to the dust, thereby improved hot-blast convenience that utilizes, with this process time of having practiced thrift cement manufacture, consequently improved cement manufacture's efficiency.

Optionally, the positioning assembly includes:

the magnetic plate is arranged on the filter drawer and is adsorbed on the circulation box;

the locating plate is arranged on the filter drawer and is abutted against the mounting hole, and a handle convenient to pull is arranged on the locating plate.

Through adopting above-mentioned technical scheme, pulling handle drives the locating plate and keeps away from the mounting hole, and the magnetic plate breaks away from the circulation case simultaneously, and continuous pulling handle makes the filtration steamer tray break away from the circulation case, then can clear up or change on the filtration steamer tray, and during the installation, promotes the locating plate and makes the magnetic plate adsorb on the circulation case, and the locating plate supports tightly on the mounting hole simultaneously to this clearance that realizes the filtration steamer tray is changed and the installation location, thereby has improved the convenience of filtration steamer tray clearance change and installation location.

Optionally, be provided with exhaust mechanism in the frame, exhaust mechanism includes:

the powder collecting box is arranged on the frame and used for collecting fine powder;

the air outlet pipe is arranged on the powder collecting box and connected with the fine powder discharging hole and used for conveying the air-powder mixture;

the exhaust pipe is arranged on the powder collecting box, is connected with the powder collecting box and is used for exhausting gas;

the separation assembly is arranged on the powder collecting box and used for separating gas from powder.

Through adopting above-mentioned technical scheme, steam and fine powder mixture get into album powder incasement through going out the tuber pipe from the fine powder discharge gate, and separation subassembly starts to separate the mixture, and gas is discharged from the exhaust pipe, and the fine powder remains and remains the follow-up use in album powder incasement to this realizes the separation collection of emission and the fine powder of steam, thereby improves the convenience that emission and the separation collection of fine powder of steam.

Optionally, the separation assembly includes:

the separating plate is arranged on the powder collecting box, is positioned above the air outlet pipe and below the exhaust pipe, and is provided with a plurality of separating holes for gas to pass through at intervals;

the vibration motor is arranged on the powder collecting box and used for driving the powder collecting box to vibrate.

Through adopting above-mentioned technical scheme, steam and fine powder mixture get into album powder incasement from the tuber pipe, and the separator plate blocks the mixture, and the fine powder is kept apart the back by the separator plate and drops in album powder incasement, and gas is discharged from the exhaust pipe after passing through the separating hole, and vibrating motor starts and drives album powder case and produce the vibration, and album powder case vibration drives the separator plate and produces the vibration to make the powder that adheres to on the separator plate fall in album powder incasement, with this realization gas-powder separation, with this convenience that has improved the fine powder and has collected, consequently improved cement production's efficiency.

Optionally, the powder collecting box is inserted and provided with an active carbon plate, and the active carbon plate is positioned above the separation plate and below the exhaust pipe and used for purifying gas.

Through adopting above-mentioned technical scheme, the steam is through the active carbon board behind the separation hole, and the active carbon board adsorbs the purification to remaining dust granule in the steam, and the gas after the purification is directly through exhaust pipe exhaust to reduce the dust along with the probability in the air of the direct emission of steam, with this feature of environmental protection that has improved cement manufacture process, after using one section, stir the active carbon board and break away from the collection powder case and change the active carbon board, with this purification efficiency who improves the active carbon board.

In summary, the present application includes at least one of the following beneficial technical effects:

the suction pump starts in pumping air to the bellows, heating element starts heats the air, open the blast gate, the gaseous air of heating gets into the selection powder machine through the blast pipe in, add the selection powder machine with the material in, adjust the size of blast gate and screen the material, the gaseous stoving of material that heats simultaneously, the coarse powder discharge gate after the screening is discharged, fine powder and heating gas are discharged from the fine powder discharge gate, through drying and preheating in the selection by winnowing, need not to establish preheating device in addition, thereby the process time of cement manufacture has been practiced thrift, therefore, cement manufacture's efficiency has been improved.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a schematic view of a heating assembly of the present application, with the air supply box partially sectioned;

FIG. 3 is a schematic view of the circulation assembly of the present application, with the circulation tank partially sectioned;

fig. 4 is a schematic structural view of the air exhaust mechanism in the present application, wherein the powder collecting box is partially sectioned.

Reference numerals: 1. a frame; 11. a powder selecting machine; 12. a feed pipe; 13. a coarse powder discharge port; 14. a fine powder discharge port; 2. an air supply mechanism; 21. a blow box; 211. a suction pump; 22. an air supply pipe; 221. an air supply valve; 222. an air supply pump; 23. a heating assembly; 231. a heating plate; 232. an electric heating tube; 233. a temperature sensor; 234. an air supply space; 3. a circulation assembly; 31. a circulation box; 311. an air inlet pipe; 32. a circulation pipe; 321. a circulation valve; 33. a mounting hole; 34. a filter drawer; 4. a positioning assembly; 41. a magnetic plate; 42. a positioning plate; 421. a handle; 5. an exhaust mechanism; 51. a powder collecting box; 511. a plug hole; 52. an air outlet pipe; 53. an exhaust pipe; 54. a separation assembly; 541. a separation plate; 542. a vibration motor; 543. a separation hole; 55. an activated carbon plate.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The model number of the temperature sensor 233 in the embodiment of the application is WZP-187-3PBO.

The embodiment of the application discloses an air supply system for powder tail selection.

Referring to fig. 1, an air supply system for powder tail selection comprises a frame 1 and a powder selector 11 fixedly installed on the frame 1, wherein the powder selector 11 is a V-shaped powder selector 11 in the prior art, a feed pipe 12 is fixedly installed at the top end of the powder selector 11, the feed pipe 12 is communicated with the powder selector 11 and is used for adding powder, a coarse powder discharge port 13 and a fine powder discharge port 14 are formed in the bottom end of the powder selector 11, the coarse powder discharge port 13 is positioned on one side of the feed pipe 12 close to the fine powder discharge port 14, the fine powder discharge port 14 is positioned above the coarse powder discharge port 13, the coarse powder discharge port 13 is used for discharging coarse powder, the fine powder discharge port 14 is used for discharging fine powder, and an air supply mechanism 2 is arranged on the frame 1.

Referring to fig. 1 and 2, the air supply mechanism 2 includes an air supply box 21, an air supply pipe 22 and a heating assembly 23, the air supply box 21 is fixedly installed on the upper surface of the frame 1 and is used for temporarily storing air, a suction pump 211 for sucking air is fixedly installed on the outer side wall of the air supply box 21 far from the powder concentrator 11, and the suction pump 211 is communicated with the air supply box 21 and is used for sucking air into the air supply box 21; the air supply pipe 22 is fixedly arranged on the outer side wall of the air supply box 21, which is away from the suction pump 211, two ends of the air supply pipe 22 are respectively connected with the air supply box 21 and the powder concentrator 11 and are used for conveying gas, and an air supply valve 221 for controlling opening and closing is arranged on the air supply pipe 22; the blast pipe 22 is provided with a blast pump 222, and the blast pump 222 is positioned on a side of the blast valve 221 away from the blast box 21 and is used for delivering gas to the powder selector 11.

Referring to fig. 1 and 2, the heating assembly 23 is disposed on the air feeding box 21 and is used for heating air, the heating assembly 23 includes two heating plates 231, an electric heating tube 232 and a temperature sensor 233, the two heating plates 231 are respectively fixedly mounted on two opposite inner side walls of the air feeding box 21, the two heating plates 231 are in vertical states, the height of the heating plates 231 is smaller than that of the air feeding box 21, an air feeding space 234 through which air passes is formed between the heating plates 231 and the inner side walls of the air feeding box 21, and two ends of the air feeding space 234 are respectively communicated with the suction pump 211 and the air feeding pipe 22.

Referring to fig. 1 and 2, the electric heating tubes 232 are provided with two groups and correspond to the heating plates 231 one by one, and the electric heating tubes 232 are fixedly installed on the outer side walls of the heating plates 231 and used for heating air; the temperature sensor 233 is fixedly installed on the outer sidewall of the blower box 21, and a detecting element of the temperature sensor 233 extends into the blower box 21 and is used for detecting the air temperature.

Referring to fig. 1 and 2, the suction pump 211 is started to suck air into the air box 21, the electric heating pipe 232 is started, the air enters the air box 21 under the action of the suction pump 211 and enters the air pipe 22 after passing through the air feeding space 234, the temperature sensor 233 detects the temperature of the air, the temperature of the air heated by the electric heating pipe 232 is adapted to the drying and preheating of different materials, thereby realizing the heating of the air, the air feeding valve 221 and the air feeding pump 222 are opened, the heated air enters the powder selecting machine 11 through the air pipe 22, the materials are added into the powder selecting machine 11, the size of the air feeding valve 221 is adjusted to screen the materials, the heated air dries the materials, coarse powder with larger particle size is discharged from the coarse powder discharging hole 13 due to gravity, the fine powder and the heated air are discharged from the fine powder discharging hole 14, and the drying and preheating are carried out while the air is separated by winnowing, and a preheating device is not needed to be additionally arranged, thereby saving the working procedure time of cement production, and improving the efficiency of cement production.

Referring to fig. 1 and 3, a circulation assembly 3 for circulating hot air of a kiln is arranged on a frame 1, the circulation assembly 3 comprises a circulation box 31 and a circulation pipe 32, the circulation box 31 is fixedly arranged on the frame 1, an air inlet pipe 311 connected with the kiln is fixedly arranged on the upper surface of the circulation box 31, and the air inlet pipe 311 is communicated with the circulation box 31 and is used for conveying hot air generated by the kiln into the circulation box 31; the circulation pipe 32 is fixedly installed on the outer side wall of the circulation box 31 and is connected with the circulation box 31, one end of the circulation pipe 32, which is far away from the circulation box 31, is communicated with the air supply pipe 22, the circulation pipe 32 is positioned between the air supply valve 221 and the air supply pump 222, and the circulation valve 321 for controlling opening and closing is installed on the circulation pipe 32.

Referring to fig. 1 and 3, a horizontal mounting hole 33 is formed in the outer side wall of the circulation box 31, the mounting hole 33 is located above the circulation pipe 32, a filter drawer 34 is horizontally slidably mounted on the inner wall of the mounting hole 33, the filter drawer 34 can be taken down from the mounting hole 33, the filter drawer 34 is located above the circulation pipe 32 and is used for filtering particles in hot air of a kiln, a plurality of filter holes (not shown in the drawing) are formed in the filter drawer 34 at intervals, the filter holes are used for intercepting the particles in the hot air of the kiln, and a positioning assembly 4 used for positioning the filter drawer 34 is arranged on the circulation box 31.

Referring to fig. 1 and 3, the positioning assembly 4 includes a magnetic plate 41 and a positioning plate 42, the magnetic plate 41 being fixedly installed on the filter drawer 34 and adsorbed on the inner sidewall of the circulation box 31 opposite to the installation hole 33; the locating plate 42 is fixedly installed on the outer side wall of the filter drawer 34, which is away from the magnetic plate 41, and the locating plate 42 is abutted against the outer side wall of the installation hole 33, meanwhile, the locating plate 42 is abutted against the outer side wall of the circulation box 31, and a handle 421 which is convenient for force borrowing is fixedly installed on the outer side wall of the locating plate 42.

Referring to fig. 1 and 3, when the kiln is operated to generate hot air, the circulation box 31 collects hot air generated by the kiln, the air supply valve 221 is closed, the circulation valve 321 and the air supply pump 222 are opened, the hot air of the kiln is provided with part of dust, the hot air of mixed dust is filtered through the filter drawer 34, the hot air enters the circulation pipe 32 after passing through the filter drawer 34, the dust is trapped by the filter drawer 34, the hot air enters the powder concentrator 11 after passing through the air supply pipe 22 through the circulation pipe 32 under the action of the air supply pump 222, and the materials are subjected to air separation, drying and preheating through the hot air of the kiln, so that the working procedure time of cement production is saved, the efficiency of cement production is improved, the energy is saved, and the waste of the hot air of the kiln is reduced.

Referring to fig. 1 and 4, an exhaust mechanism 5 is arranged on a frame 1, the exhaust mechanism 5 comprises a powder collecting box 51, an air outlet pipe 52, an exhaust pipe 53 and a separating component 54, and the powder collecting box 51 is fixedly arranged on the upper surface of the frame 1 and is used for collecting fine powder; the air outlet pipe 52 is fixedly arranged on the outer side wall of the powder collecting box 51, two ends of the air outlet pipe 52 are respectively communicated with the powder collecting box 51 and the fine powder discharging hole 14, and the air outlet pipe 52 is used for conveying the gas-powder mixture into the powder collecting box 51; the exhaust pipe 53 is fixedly installed on the upper surface of the powder collecting box 51 and communicated with the interior of the powder collecting box 51, and the exhaust pipe 53 is used for exhausting gas.

Referring to fig. 1 and 4, the separation assembly 54 is disposed on the powder collecting box 51 and is used for separating gas and powder, the separation assembly 54 includes a separation plate 541 and a vibration motor 542, the separation plate 541 is fixedly mounted on the inner wall of the powder collecting box 51, the separation plate 541 is in a horizontal state and is located above the air outlet pipe 52, meanwhile, the separation plate 541 is located below the air outlet pipe 53, a plurality of separation holes 543 used for allowing gas to pass through are spaced apart from the separation plate 541, the aperture of the separation holes 543 is larger than the particle size of fine powder, the hot air is discharged from the air outlet pipe 53 after passing through the separation holes 543, the fine powder is trapped by the separation holes 543 and falls on the inner bottom wall of the powder collecting box 51 under the action of self gravity, and the bottom end of the powder collecting box 51 is connected with subsequent powder conveying equipment (not shown in the drawing), which can be any mode of powder conveying in the prior art.

Referring to fig. 1 and 4, a vibration motor 542 is fixedly installed on the outer sidewall of the powder collecting bin 51 and is used to drive the powder collecting bin 51 to vibrate; the outer side wall of the powder collecting box 51 is provided with a horizontal inserting hole 511, the inner bottom wall of the inserting hole 511 is horizontally slidably provided with an active carbon plate 55, and the active carbon plate 55 is inserted and installed on the inner wall of the powder collecting box opposite to the inserting hole 511 and can be taken down from the inserting hole 511; the activated carbon plate 55 is positioned above the separation plate 541 and below the exhaust duct 53 and serves to purify the hot gas.

Referring to fig. 1 and 4, a mixture of hot air and fine powder enters the powder collecting box 51 from the air outlet pipe 52, the separating plate 541 blocks the mixture, fine powder falls into the powder collecting box 51 after being separated by the separating plate 541, the hot air passes through the active carbon plate 55 after passing through the separating holes 543, the active carbon plate 55 adsorbs and purifies dust particles remained in the hot air, and the purified air is directly discharged through the exhaust pipe 53, so that the environmental protection performance of the cement production process is improved, and the active carbon plate 55 can be replaced by pulling the active carbon plate 55 out of the powder collecting box 51, so that the purification efficiency of the active carbon plate 55 is improved; meanwhile, the vibration motor 542 is started to drive the powder collecting box 51 to vibrate, and the powder collecting box 51 vibrates to drive the separating plate 541 to vibrate, so that powder adhered to the separating plate 541 falls into the powder collecting box 51, gas-powder separation is achieved, convenience in collecting fine powder is improved, and therefore cement production efficiency is improved.

The working principle of the embodiment of the application is as follows:

when the kiln is not in operation, the suction pump 211 is started to suck air into the air feeding box 21, the electric heating pipe 232 is started, the air enters the air feeding box 21 under the action of the suction pump 211 and enters the air feeding pipe 22 after passing through the air feeding space 234, the temperature sensor 233 detects the temperature of the air, so that the temperature of the air heated by the electric heating pipe 232 is suitable for drying and preheating different materials, the air is heated, the air supply valve 221 and the air supply pump 222 are opened, and the heated air enters the powder selecting machine 11 through the air feeding pipe 22; the powder selecting machine 11 is added with materials, the size of the air supply valve 221 is adjusted to screen the materials, meanwhile, heated gas is used for drying the materials, coarse powder with larger particle size is discharged from the coarse powder discharging hole 13 due to gravity, fine powder and heated gas are discharged from the fine powder discharging hole 14, drying and preheating are carried out while air separation is carried out, and a subsequent preheating device is not needed, so that the working procedure time of cement production is saved, and the efficiency of cement production is improved.

When the kiln runs to generate hot air, the circulation box 31 collects hot air generated by the kiln, the air supply valve 221 is closed, the circulation valve 321 is opened, the hot air enters the circulation pipe 32 after passing through the filter drawer 34, dust is trapped by the filter drawer 34, the hot air enters the powder concentrator 11 after passing through the air supply pipe 22 through the circulation pipe 32, and the materials are subjected to winnowing, drying and preheating through the hot air of the kiln, so that the working procedure time of cement production is saved, the cement production efficiency is improved, the energy is saved, and the waste of the hot air of the kiln is reduced.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The air supply system for powder tail selection comprises a frame (1) and a powder selecting machine (11) arranged on the frame (1), wherein a coarse powder discharging hole (13) and a fine powder discharging hole (14) are formed in the powder selecting machine (11), and the air supply system is characterized in that: an air supply mechanism (2) is arranged on the frame (1), and the air supply mechanism (2) comprises:

an air supply box (21), wherein the air supply box (21) is arranged on the frame (1) and is used for temporarily storing air, and a suction pump (211) for sucking air is arranged on the air supply box (21);

an air supply pipe (22), wherein the air supply pipe (22) is arranged on the air supply box (21), is communicated with the powder selecting machine (11) and is used for conveying gas, and an air supply valve (221) for controlling the opening and closing is arranged on the air supply pipe (22);

and the heating assembly (23) is arranged on the air supply box (21) and used for heating air.

2. The powder tail selector air supply system of claim 1, wherein: the heating assembly (23) comprises:

a heating plate (231), wherein the heating plate (231) is arranged on the air supply box (21), and an air supply space (234) through which air passes is formed between the heating plate (231) and the air supply box (21);

an electric heating tube (232), wherein the electric heating tube (232) is arranged on the heating plate (231) and is used for heating air;

and a temperature sensor (233), wherein the temperature sensor (233) is arranged on the air supply box (21) and is used for detecting the air temperature.

3. The powder tail air supply system according to claim 2, wherein: be provided with on frame (1) and be used for circulating circulation subassembly (3) to kiln steam, circulation subassembly (3) include:

the circulating box (31) is arranged on the frame (1) and is used for temporarily storing hot air generated by the kiln;

the circulating pipe (32), the circulating pipe (32) is arranged on the circulating box (31) and is connected with the air supply pipe (22), and the circulating pipe (32) is provided with a circulating valve (321) for controlling opening and closing.

4. A powder tail selector air supply system as set forth in claim 3, wherein: the circulating box (31) is provided with a horizontal mounting hole (33), a filter drawer (34) is arranged on the mounting hole (33) in a sliding manner, the filter drawer (34) is located above the circulating pipe (32) and used for filtering particulate matters in hot air of a kiln, and the circulating box (31) is provided with a positioning assembly (4) used for positioning the filter drawer (34).

5. The powder tail selector air supply system of claim 4, wherein: the positioning assembly (4) comprises:

a magnetic plate (41), wherein the magnetic plate (41) is arranged on the filter drawer (34) and is adsorbed on the circulation box (31);

the locating plate (42), locating plate (42) set up on filtering steamer tray (34) and support tightly on mounting hole (33), be provided with handle (421) of being convenient for the pulling on locating plate (42).

6. The powder tail selector air supply system of claim 1, wherein: an exhaust mechanism (5) is arranged on the frame (1), and the exhaust mechanism (5) comprises:

the powder collecting box (51) is arranged on the frame (1) and is used for collecting fine powder;

the air outlet pipe (52) is arranged on the powder collecting box (51) and is connected with the fine powder discharging hole (14) and used for conveying the gas-powder mixture;

the exhaust pipe (53) is arranged on the powder collecting box (51) and is connected with the powder collecting box (51) in an internal mode and used for exhausting gas;

and the separation assembly (54) is arranged on the powder collecting box (51) and is used for separating gas from powder.

7. The powder tail selector air supply system of claim 6, wherein: the separation assembly (54) includes:

the separating plate (541) is arranged on the powder collecting box (51), the separating plate (541) is positioned above the air outlet pipe (52) and below the exhaust pipe (53), and a plurality of separating holes (543) for allowing gas to pass through are formed in the separating plate (541) at intervals;

and the vibration motor (542) is arranged on the powder collecting box (51) and is used for driving the powder collecting box (51) to vibrate.

8. The powder tail selector air supply system of claim 7, wherein: the powder collecting box (51) is inserted and provided with an active carbon plate (55), and the active carbon plate (55) is positioned above the separating plate (541) and below the exhaust pipe (53) and is used for purifying gas.

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