CN217511425U - High temperature resistant superfine powder collection device - Google Patents

Abstract

The utility model discloses a high temperature resistant superfine powder collection device, a baffle divides the casing inner chamber into the working gas room on the upper portion and the powder gas mixing chamber on the lower portion, there are many high temperature resistant filter tubes used for filtering gas in the superfine powder discharge gate powder gas mixing chamber that is equipped with the valve bottom the powder gas mixing chamber, there are a plurality of through-holes on the baffle, each through-hole corresponds a filter tube, the working gas room has the jetting pipe that corresponds with the filter tube, the bottom of each jetting pipe is connected with the open top of each filter tube so that the working gas blows towards the inner hole of filter tube or the working gas that the powder gas mixing chamber filters through the filter tube enters the working gas room from the inner hole of filter tube; the extension line of the inner top wall of the feeding pipe of the powder-gas mixing chamber is positioned below the filter pipe; the center hole of the top plate of the shell and the center hole of the clapboard are hermetically connected with a rotatable powder stirring rod, and a powder stirring plate for stirring powder is fixed on the powder stirring rod. The collecting device can collect the ultrafine powder with good particle dispersibility in a high-temperature environment.

Description

High temperature resistant superfine powder collection device

Technical Field

The utility model relates to a technical field is collected to superfine powder, concretely relates to high temperature resistance superfine powder collection device.

Background

In the process of preparing the powder by the gas phase method, the powder needs to be subjected to gas-solid separation and then collected. The conventional method is carried out by using a bag-type dust collector or an electric dust collector, but the bag-type dust collector is limited in use because the bag-type dust collector cannot resist high temperature under a high-temperature operation environment. The electric dust removal has a limited effect on removing or collecting ultrafine powder or ultrafine powder with the diameter of less than 2 microns, and meanwhile, the requirements of the properties of the ultrafine powder prepared by a gas phase method or the self characteristics of the gas phase atmosphere chemical properties such as explosion prevention and safety are not suitable for electric dust removal.

In the prior art, powder is collected in a high-temperature environment, and is also collected by using a metal powder sintering filter, but for ultrafine powder, such as powder with the diameter of less than 2 microns, the ultrafine powder is collected by using the metal powder sintering filter in a working environment of 50-800 ℃, and powder oxidation prevention needs to be considered, because in this case, the powder is easy to be subjected to conjoined agglomeration or commonly called agglomeration due to oxidation, so that the aim of collecting ultrafine powder with good particle dispersibility in the high-temperature environment cannot be achieved, and improvement is urgently needed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a high temperature resistant superfine powder collection device of the good superfine powder of granule dispersibility under high temperature environment.

The utility model provides a high temperature resistant superfine powder collecting device, which comprises a shell provided with a coolant jacket, a clapboard divides the inner cavity of the shell into an upper working gas chamber and a lower powder gas mixing chamber, the air inlet and the air outlet of the working gas are both communicated with the working gas chamber, the bottom end of the powder gas mixing chamber is provided with a superfine powder discharge port provided with a valve, a plurality of high temperature resistant filter pipes used for filtering the gas are arranged in the powder gas mixing chamber, a plurality of through holes are arranged on the clapboard, each through hole is corresponding to one filter pipe one by one, each filter pipe is fixed and sealed with each through hole wall, the working gas chamber is provided with a spray blow pipe corresponding to each filter pipe one by one, the bottom end of each blowing pipe is connected with the top opening of each filter pipe so that working gas is blown to the inner hole of each filter pipe or the working gas filtered by the filter pipes in the powder gas mixing chamber enters the working gas chamber from the inner hole of each filter pipe; the extension line of the inner top wall of the feeding pipe of the powder-gas mixing chamber is positioned below the filter pipe; the center hole of the top plate of the shell and the center hole of the clapboard are hermetically connected with a rotatable powder stirring rod, and a powder stirring plate for stirring powder is fixed on the powder stirring rod.

After the structure more than adopting, the utility model relates to a high temperature resistant superfine powder collection device has following advantage:

the high-temperature ultrafine powder entering the powder-gas mixing chamber along with working gas in the system is separated in the powder-gas mixing chamber by the filter pipe, the gas is filtered by the filter pipe and then enters the working gas chamber through the inner hole of the filter pipe, when the ultrafine powder needs to be collected, the working gas of the injection pipe is used for injecting the working gas into the inner hole of the filter pipe so as to inject the ultrafine powder adhered to the outer wall of the filter pipe to separate from the filter pipe, and the powder stirring rod is rotated to drive the powder stirring plate to discharge the ultrafine powder from the ultrafine powder discharge hole at the bottom end. The collecting device enables the ultrafine powder to be continuously subjected to gas-solid separation and collection in a high-temperature environment.

Every jetting pipe and every uncovered connection structure of filter tube can be in order to guarantee that working gas gets into the filter tube hole with higher stamping state and to call the inner chamber to accomplish the blowback and take off the powder process, also can guarantee to get into the working gas room smoothly along with the powder that the powder called the powder got into the powder gas mixing chamber among the gas-solid separation process, and simple structure is reliable.

The powder stirring rod drives the powder stirring plate to rotate so as to stir while discharging ultrafine powder from the discharge port at the bottom end, so that the discharging is quicker and smoother, the ultrafine powder can be continuously subjected to gas-solid separation and collection in a high-temperature, oxygen-free or low-oxygen environment, and the realization of the target of collecting the ultrafine powder with good particle dispersibility in the high-temperature environment is well ensured.

The extension line of the inner top wall of the feeding pipe of the powder-gas mixing chamber is positioned below the filter pipe, so that the filter pipe which is high-temperature resistant and used for filtering gas can be prevented from being damaged when the feeding pipe is cleaned, and particularly, the powder-gas mixed feeding can not directly collide the side surface of the filter pipe to cause local overheating or excessive local powder aggregation, so that the technical effect of collecting super powder with good particle dispersibility at high temperature is further ensured.

Further, the filter pipe is a metal powder sintered filter pipe. After the structure more than adopting, this collection device's high temperature resistant characteristics are more outstanding, and gas filtration effect is better, and can prolong the life of this device.

Furthermore, the outer diameter of the filter pipe is 5-100mm, and the height of the filter pipe is 10-1000 mm. After adopting above structure, the filter area of filter tube is reasonable, can satisfy the demand of collecting superfine powder in the production process.

Further, the radial distance between any two filter pipes is larger than 5 mm. After the structure is adopted, the space in the shell is not excessively occupied, and the situation that powder on the outer walls of adjacent filter pipes is mutually stacked to influence normal gas passing through the pipe wall of the filter can be guaranteed.

Furthermore, the through hole is a circular through hole, the filtering pipe is a circular pipe, the injection pipe is coaxial with the circular through hole and the filtering pipe, the outer diameter of the injection pipe is smaller than the inner diameter of the filtering pipe, the bottom end of the injection pipe is higher than the top end of the filtering pipe, or the bottom end of the injection pipe and the top end of the filtering pipe are on the same horizontal plane, or the bottom end of the injection pipe extends into a hole below the top end of the filtering pipe. After the structure more than adopting, provide a class of concrete structure of jetting pipe and the uncovered connection of filter tube, can further guarantee that working gas gets into the filter tube hole or calls the inner chamber with higher stamping state in order to accomplish the blowback and take off the powder process, also can further guarantee to get into the working gas room smoothly along with the powder of powder entering powder gas mixing chamber among the gas-solid separation process, and simple structure is reliable.

Furthermore, the through hole is a circular through hole, the filtering pipe is a circular pipe, the jetting pipe is coaxial with the circular through hole and the filtering pipe, the bottom end of the jetting pipe is connected and sealed with the top end of the filtering pipe, at least one horizontal vent pipe is arranged on the jetting pipe, or at least one inclined vent pipe from bottom to top is arranged on the jetting pipe, or at least one vent hole is arranged on the jetting pipe. After the structure is adopted, another type of specific structure that the injection pipe is connected with the opening of the filter pipe is provided, so that the working gas can be further ensured to enter an inner hole or an inner cavity of the filter pipe in a higher stamping state to complete a back flushing and powder removing process, the working gas entering the powder-gas mixing chamber along with powder in the gas-solid separation process can be further ensured to smoothly enter the working gas chamber, and the structure is simple and reliable.

Furthermore, the shape of the powder stirring plate is similar to that of the bottom plate of the powder-gas mixing chamber, the bottom end of the powder stirring rod is fixed with the powder stirring plate, the width dimension of the powder stirring plate is smaller than the diameter dimension of the superfine powder discharge port, the powder stirring plate is in contact with the bottom plate of the powder-gas mixing chamber, the part of the powder stirring rod extending out of the top plate of the shell is connected with a rotation driving mechanism, the sealing is realized by arranging a sealing ring between the powder stirring rod and the central hole of the top plate of the shell, and a sealing ring is also arranged between the powder stirring rod and the central hole of the partition plate. After the structure is adopted, the powder stirring structure is more reasonable and labor-saving, the discharging is quicker and smoother, and the collecting effect of the superfine powder in a high-temperature, oxygen-free or low-oxygen environment and the good particle dispersibility of the superfine powder are further ensured.

Furthermore, cooling water interlayers are arranged on the powder stirring rod and the powder stirring plate. After the structure more than adopting, both having stirred the powder pole and having stirred the powder board and cool off the protection, connect the powder gas mixture in the cooling powder gas mixing chamber through stirring the powder pole and stirring the powder board simultaneously to further guaranteed the collection effect of superfine powder under high temperature, anaerobic or low oxygen environment and the good granule dispersibility of superfine powder, further prolonged the life of this device.

Furthermore, the outer wall of the powder-gas mixing chamber is provided with a knocking device. A hammering device such as a hand hammer, a driving hammer or an electric hammer. After the structure is adopted, the discharging is faster and smoother, and the collecting effect of the ultrafine powder in a high-temperature, oxygen-free or low-oxygen environment and the good particle dispersibility of the ultrafine powder are further ensured.

Further, the utility model relates to a high temperature resistant superfine powder collection device still includes a powder transfer room, powder transfer room with the bottom discharge mouth sealing connection of powder gas mixing chamber, the bottom of powder transfer room is equipped with valve control's row powder mouth. After adopting above structure, the anaerobic or hypoxic environment in the powder mixing chamber is better, has further guaranteed the collection effect and the good granule dispersibility of superfine powder under high temperature, anaerobic or hypoxic environment of superfine powder.

Drawings

Fig. 1 is a front cross-sectional structural schematic diagram of the high temperature resistant ultrafine powder collecting device of the utility model.

Fig. 2 is the utility model discloses a super fine powder collection device's of high temperature resistance sectional structure sketch map that bows.

Fig. 3 is a schematic structural view of the first embodiment of the present invention in which the bottom end of the middle injection tube is connected to the top end of the filter tube.

Fig. 4 is a schematic structural view of a second embodiment of the present invention, in which the bottom end of the middle blowing pipe is connected with the top end of the filtering pipe in an open manner.

Fig. 5 is a schematic structural view of a third embodiment of the present invention, in which the bottom end of the middle blowing pipe is connected with the top end of the filtering pipe.

Fig. 6 is a schematic structural view of a fourth embodiment of the present invention, in which the bottom end of the middle blowing pipe is connected to the top end of the filtering pipe.

Fig. 7 is a schematic structural view of a fifth embodiment of the present invention, in which the bottom end of the middle blowing pipe is connected to the top end of the filtering pipe.

Fig. 8 is a schematic structural view of a sixth embodiment of the present invention, in which the bottom end of the middle blowing pipe is connected with the top end of the filtering pipe.

Shown in the figure: 1. the device comprises a valve, 2, a discharge hole, 3, a cooling water interlayer, 4, a feed pipe, 5, a powder-gas mixing chamber, 6, a partition plate, 7, a cooling water jacket, 8, a shell, 9, a water outlet, 10, a working gas input pipe, 11, a working gas source, 12, a sealing ring, 13, a powder stirring rod, 14, a gas inlet, 15, a shell top plate, 16, a gas outlet, 17, a working gas chamber, 18, a blowing pipe, 19, a filtering pipe, 20, a powder stirring plate, 21, a water inlet, 22, a powder transfer chamber, 23, a powder discharge hole, 24, a horizontal vent pipe, 25, an oblique vent pipe, 26 and a vent hole.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding the present invention, but the present invention is not limited thereto. Furthermore, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 3, 4, 5, 6, 7 and 8.

The utility model relates to a high temperature resistance superfine powder collection device, the name also can be understood as collecting superfine powder's collection device in high temperature environment. Comprising a housing 8 provided with a coolant jacket, or coolant jacket or cooling jacket. A coolant jacket such as a cooling water jacket or a cooling gas jacket. Generally, a cooling water jacket 7, also called a cooling water channel, or called a cooling water cavity, or called a cooling water jacket, is used. The water inlet 21 of the cooling water jacket 7 can be arranged at the bottom of the cooling water jacket 7, and the water outlet 9 of the cooling water jacket 7 can be arranged at the top of the cooling water jacket 7. It will be understood that the water inlet 21 of the cooling jacket 7 can be connected to a cooling water source such as a tap water pipe via a valve and a pipe, and the water outlet 9 of the cooling jacket 7 can be connected to a subsequent reuse device via a valve and a pipe. A partition plate 6 divides the inner cavity of the shell into an upper working gas chamber 17 and a lower powder-gas mixing chamber 5, a working gas inlet 14 and a working gas outlet 16 are both communicated with the working gas chamber 17 through pipelines, and an ultrafine powder discharge port 2 provided with a valve 1 is arranged at the bottom end of the powder-gas mixing chamber 5. The working gas, also called working medium gas, also called high-pressure gas, generally adopts one of nitrogen, argon, helium and hydrogen, in other words, can be at least one of nitrogen, argon, helium and hydrogen. It will be appreciated that the working fluid gas circulation system is a closed system, schematically indicated as working gas source 11 in fig. 1, the equipment of which includes, but is not limited to, an air compressor or pump and a working gas cylinder. The valve 1 may use an automatically controlled electric valve or a solenoid valve. The pressure of working gas or working medium gas in the system is generally 0.5-3 MPa. The valve 1 is a general term and includes a valve for controlling cooling water, a valve for controlling gas, a valve for controlling powder, and the like. The above is the prior art and will not be described further.

The utility model relates to a high temperature resistant superfine powder collection device's invention point lies in:

as shown in fig. 1 and 2.

The powder-air mixing chamber 5 is internally provided with a plurality of high-temperature-resistant filtering pipes 19 for filtering air, the partition plate 6 is provided with a plurality of through holes (not shown in the figure), each through hole corresponds to one filtering pipe 19, each filtering pipe 19 is fixed and sealed with the wall of each through hole, the working air chamber 17 is provided with an injection pipe 18 corresponding to each filtering pipe 19, the bottom end of each injection pipe 18 is connected with the top end opening of each filtering pipe 19 so that the working air can be injected into the inner holes of the filtering pipes 19 or the working air filtered by the powder-air mixing chamber 5 through the filtering pipes 19 can enter the working air chamber 17 from the inner holes of the filtering pipes 19. The working gas in the powder-gas mixing chamber 5 enters the working gas chamber 17 and can be called as forward entering, and the blowing of the gas to the inner hole of the high-temperature-resistant filter tube 19 by the blowing tube 18 can be called as reverse blowing. The extension line of the inner top wall of the feeding pipe 4 of the powder-gas mixing chamber 5 is positioned below the filter pipe 19, and the feeding pipe 4 can be communicated with the powder making equipment of the previous working procedure through a valve. The center hole of the top plate 15 of the shell and the center hole of the clapboard 6 are connected with a rotatable powder stirring rod 13 in a sealing way, and a powder stirring plate 20 for stirring powder is fixed on the powder stirring rod 13. The powder stirring rod 13 can be called a cleaning rod, and the powder stirring plate 20 can be called a scraper. The working gas source 11 or high-pressure gas source is connected with the injection tube 18 through a working gas input tube 10 which is described below and is provided with a valve 1.

The high temperature resistant filter tube 19 is preferably a metal powder sintered filter tube because of its high temperature resistance. The utility model provides a temperature of working gas in the inlet pipe 4 of powder gas mixing chamber 5 is between 50 ℃ -800 ℃, so, in the occasion that part temperature requirement is not high, also can use metal fiber sintering filter tube, high temperature stainless steel filter tube or high temperature ceramic filter tube below 200 ℃.

The filter tube 19 preferably has an outer diameter of 5 to 100mm and a height of 10 to 1000mm, height also being understood as length. The number of the filter pipes 19 in the high temperature resistant superfine powder collecting device of the utility model is generally 10-500, which can be adjusted according to the actual working condition. The radial spacing of any two filter tubes 19 is preferably greater than 5 mm. As shown in fig. 2, a plurality of groups of filtering pipes 19 can be uniformly arranged along concentric circles with the center of the partition plate 6 as the center, and each group generally does not exceed 8 or 8. The blowing pipes 18 corresponding to the filtering pipes 19 one by one are also provided in plural groups, each group does not exceed 8, and the blowing pipes 18 may be distributed in a Y-shape as shown in fig. 2, or may be distributed in a star-shape or a quincunx shape according to the number. Each set of blowing pipes 18 can be connected to a common working gas supply line 10 and can be connected to a source of working gas 11 via a control valve 1.

As shown in fig. 3, 4 and 5, a specific structure is provided in which the bottom end of each blowing pipe 18 is connected with the top end of each filtering pipe 19 in an open manner: the through hole is preferably a circular through hole, the filtering pipe 19 is preferably a circular pipe, the blowing pipe 18 is coaxial with the circular through hole and the filtering pipe 19, the outer diameter of the blowing pipe 18 is smaller than the inner diameter of the filtering pipe 19, the bottom end of the blowing pipe 18 is higher than the top end of the filtering pipe 19 as shown in fig. 3, or the bottom end of the blowing pipe 18 and the top end of the filtering pipe 19 are on the same horizontal plane as shown in fig. 4, or the bottom end of the blowing pipe 18 extends into the inner hole below the top end of the filtering pipe 19 as shown in fig. 5.

As shown in fig. 6, 7 and 8, another specific structure is provided in which the bottom end of each blowing pipe 18 is connected with the top end of each filtering pipe 19 in an open manner: the through hole is preferably a circular through hole, the filtering pipe 19 is preferably a circular pipe, the injection pipe 18 is coaxial with the circular through hole and the filtering pipe 19, the bottom end of the injection pipe 18 is connected and sealed with the top end of the filtering pipe 19, and at least one horizontal vent pipe 24 is arranged on the injection pipe 18 as shown in fig. 6, or at least one downward-upward oblique vent pipe 25 is arranged on the injection pipe 18 as shown in fig. 7, or at least one vent hole 26 as shown in fig. 8 is arranged on the injection pipe 18. The outer diameter of the blowing pipe 18 may be smaller than the inner diameter of the filtering pipe 19.

As shown in fig. 1, the shape of the powder stirring plate 20 is similar to the shape of the bottom plate of the powder-gas mixing chamber, the bottom end of the powder stirring rod 13 is fixed to the powder stirring plate 20, the width dimension of the powder stirring plate 20 is smaller than the diameter dimension of the ultra-fine powder discharge port 2, the powder stirring plate 20 is in contact with the bottom plate of the powder-gas mixing chamber 5, and the part of the powder stirring rod 13 extending out of the top plate 15 of the housing is connected with a rotation driving mechanism (not shown) such as a rotation driving mechanism driven by a servo motor or a stepping motor. The sealing is that a sealing ring 12 is arranged between the powder stirring rod 13 and the central hole of the top plate 15 of the shell, and a sealing ring 12 is also arranged between the powder stirring rod 13 and the central hole of the clapboard 6. The bottom end of the powder stirring rod 13 can be fixed with the middle of the width and the middle of the length of the powder stirring plate 20, and the fixing effect and the powder stirring effect are better. The powder stirring rod 13 and the powder stirring plate 20 are both provided with cooling water interlayers 3.

Certainly, the powder stirring plate can also be in a quincunx shape, the center is provided with a through hole for discharging, the multiple petals are all fixed with the powder stirring rod through the connecting rod, namely, one end of the connecting rod is fixed with each of the quincunx petals, and the other end of the connecting rod is fixed with the middle lower part of the powder stirring rod, namely, the part of the powder stirring rod, except the bottom end, positioned in the powder-gas mixing chamber.

The outer wall of the powder-gas mixing chamber 5, namely the shell 8, is provided with a knocking device. A hammering device such as a hand hammer, a rubber hammer, a pneumatic hammer or an electric hammer (none of which are shown in the drawings).

The utility model relates to a high temperature resistance superfine powder collection device still includes a powder transfer room 22, powder transfer room 22 with 2 sealing connection of bottom discharge gate of powder gas mixing chamber 5, the bottom of powder transfer room 22 is equipped with row's powder mouth 23 by valve 1 control.

The utility model relates to a high temperature resistance superfine powder collection device working process roughly as follows:

the high-temperature ultrafine powder or called ultrafine powder enters the powder-gas mixing chamber 5 from the feeding pipe 4 along with the working gas, and is filtered by the filter pipe 19 under the pressure of the working gas, the ultrafine powder or called ultrafine powder is deposited on the outer wall of the filter pipe 19, the working gas enters the working gas chamber 17 from the open structure through the inner hole of the filter pipe 19 and is discharged through the gas outlet 16 or called a gas outlet, and the discharged working gas enters the working gas circulating system for recycling. For the ultrafine powder deposited on the outer wall of the filter pipe 19, working gas can be blown into the inner hole of the filter pipe 19 from the working gas source 11 through the blowing pipe 18 in a reverse direction at regular time to form high-pressure reverse air flow in a short time, the high-pressure reverse air flow is blown into the powder-gas mixing chamber 5 through the filter pipe 19, the deposited ultrafine powder is blown down to the wall and the bottom of the powder-gas mixing chamber 5, the powder is stirred by the powder stirring rod 13 and the powder stirring plate 20, and the external knocking device is operated in a matching way, such as hammering through a pneumatic hammer or an electric hammer, so that the ultrafine powder is concentrated into the powder transfer chamber 22 communicated with the discharge port 2 through the discharge port 2, and after the valve 1 at the discharge port 2 is closed, the ultrafine powder in the powder transfer chamber 22 is discharged into a collecting container through the valve 1 and the powder discharge port 23. The discharge port 2 can also be called a powder outlet.

It should be understood that the drawings are merely schematic representations, to the extent they do not conform to the written description, and are intended to be read in light of the written description.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a high temperature resistant superfine powder collection device, is including the casing that is equipped with the coolant cover, and a baffle divides the casing inner chamber into the working gas room on upper portion and the powder gas mixing chamber of lower part, and working gas's air inlet and gas outlet all communicate with each other with the working gas room, and powder gas mixing chamber bottom has the superfine powder discharge gate that is equipped with the valve, its characterized in that: the powder-gas mixing chamber is internally provided with a plurality of high-temperature-resistant filter pipes for filtering gas, the partition plate is provided with a plurality of through holes, each through hole corresponds to one filter pipe one by one, each filter pipe is fixed and sealed with the wall of each through hole, the working gas chamber is provided with a blowing pipe corresponding to each filter pipe one by one, and the bottom end of each blowing pipe is connected with the top end opening of each filter pipe so that the working gas is blown to the inner hole of each filter pipe or the working gas filtered by the filter pipes in the powder-gas mixing chamber enters the working gas chamber from the inner hole of each filter pipe; the extension line of the inner top wall of the feeding pipe of the powder-gas mixing chamber is positioned below the filter pipe; the center hole of the top plate of the shell and the center hole of the clapboard are hermetically connected with a rotatable powder stirring rod, and a powder stirring plate for stirring powder is fixed on the powder stirring rod.

2. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: the filter pipe is a metal powder sintered filter pipe.

3. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: the outer diameter of the filter pipe is 5-100mm, and the height of the filter pipe is 10-1000 mm.

4. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: the radial distance between any two filter pipes is more than 5 mm.

5. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: the through hole is a circular through hole, the filter pipe is a circular pipe, the injection pipe is coaxial with the circular through hole and the filter pipe, the outer diameter of the injection pipe is smaller than the inner diameter of the filter pipe, the bottom end of the injection pipe is higher than the top end of the filter pipe, or the bottom end of the injection pipe and the top end of the filter pipe are on the same horizontal plane, or the bottom end of the injection pipe extends into a hole below the top end of the filter pipe.

6. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: the through hole is a circular through hole, the filtering pipe is a circular pipe, the injection pipe is coaxial with the circular through hole and the filtering pipe, the bottom end of the injection pipe is connected and sealed with the top end of the filtering pipe, at least one horizontal vent pipe is arranged on the injection pipe, or at least one inclined vent pipe from bottom to top is arranged on the injection pipe, or at least one vent hole is arranged on the injection pipe.

7. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: the shape of the powder stirring plate is similar to that of the bottom plate of the powder-gas mixing chamber, the bottom end of the powder stirring rod is fixed with the powder stirring plate, the width dimension of the powder stirring plate is smaller than the diameter dimension of the discharge port of the ultrafine powder, the powder stirring plate is in contact with the bottom plate of the powder-gas mixing chamber, the part of the powder stirring rod extending out of the top plate of the shell is connected with a rotation driving mechanism, the sealing is realized by arranging a sealing ring between the powder stirring rod and the central hole of the top plate of the shell, and a sealing ring is also arranged between the powder stirring rod and the central hole of the partition plate.

8. A high temperature resistant ultra-fine powder collecting device as claimed in claim 7, wherein: the powder stirring rod and the powder stirring plate are both provided with cooling water interlayers.

9. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: and the outer wall of the powder-gas mixing chamber is provided with a knocking device.

10. A high temperature resistant ultra-fine powder collecting device as claimed in claim 1, wherein: the powder transfer chamber is connected with a bottom discharge hole of the powder-gas mixing chamber in a sealing manner, and a powder discharge hole controlled by a valve is formed in the bottom of the powder transfer chamber.

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