Powder humidifying device

Abstract

The utility model relates to a powder humidifying device and relates to the technical field of industrial powder humidifying, in order to solve the problems that a traditional humidifier is high in energy consumption and the like, the powder humidifying device comprises a mixing chamber and a diffusion homogenizing chamber, the mixing chamber communicates with the top of the diffusion homogenizing chamber, and the bottom of the diffusion homogenizing chamber communicates with a separation shaftless screw conveyor; the top of the mixing chamber is sequentially provided with a powder connector, a dispersing nozzle and an atomizing spray gun, one side of the mixing chamber is provided with a compressed air pipeline and an industrial water pipeline, the compressed air pipeline is communicated with the industrial water pipeline, the compressed air pipeline is communicated with three connecting hoses, the first connecting hose is connected to the dispersing nozzle, and the second connecting hose is connected to the atomizing spray gun. The second connecting hose is connected to an atomizing spray gun, an electric diaphragm metering pump, a pulse damper and a back pressure valve are sequentially arranged on the second connecting hose, and the third connecting hose is communicated into the diffusion homogenizing chamber. The method has the effects that the operation energy consumption of the whole system is reduced, and the method is suitable for small-flow powder humidification scenes.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of industrial powder humidification, and in particular to a powder humidification device. BACKGROUND

[0002] In the industrial field, powder humidification is a crucial link; most traditional humidification methods rely on a double-shaft stirring structure humidifier, which stirs the powder and water through the rotation of the double shaft to achieve the purpose of humidification; as the mainstream equipment in the industry, the double-shaft stirring humidifier plays an important role in various industrial scenarios.

[0003] In the related art, since the traditional double-shaft stirring structure humidifier has high energy consumption and high operation cost, it is not conducive to energy saving and consumption reduction of enterprises, and the overall equipment is bulky, not only has a large floor area, but also is relatively difficult to maintain, and in addition, the range control interval of the water content is relatively narrow, and it is difficult to meet the diversified needs of different users for the humidity of the powder, therefore, there are few application products for small-output powder humidification in the industry, and thus there is room for improvement. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem of high energy consumption of the traditional humidifier, the application provides a powder humidification device.

[0005] The powder humidification device provided by the application adopts the following technical scheme:

[0006] A powder humidification device comprises a mixing chamber and a diffusion homogenization chamber, the mixing chamber is communicated at the top of the diffusion homogenization chamber, a separation shaftless screw machine is communicated at the bottom of the diffusion homogenization chamber, a powder interface, a dispersion nozzle and an atomizing spray gun are sequentially arranged at the top of the mixing chamber, a compressed air pipeline and an industrial water pipeline are arranged on one side of the mixing chamber, the compressed air pipeline is communicated with the industrial water pipeline, three connecting hoses are communicated on the compressed air pipeline, a first connecting hose is connected to the dispersion nozzle, a second connecting hose is connected to the atomizing spray gun, an electric diaphragm metering pump, a pulse damper and a back pressure valve are sequentially arranged on the second connecting hose, and a third connecting hose is communicated into the diffusion homogenization chamber.

[0007] Since the traditional double-shaft stirring structure humidifier has high energy consumption and high operation cost, it is not conducive to energy saving and consumption reduction of enterprises, and the overall equipment is bulky, not only has a large floor area, but also is relatively difficult to maintain, and in addition, the range control interval of the water content is relatively narrow, and it is difficult to meet the diversified needs of different users for the humidity of the powder, therefore, there are few application products for small-output powder humidification in the industry; by adopting the above technical scheme, the mixing chamber, the diffusion homogenization chamber and the separation shaftless screw machine are arranged, the compressed air pipeline and the industrial water pipeline are arranged on one side of the mixing chamber, and three connecting hoses are arranged on the compressed air pipeline;

[0008] When the powder is humidified, the powder interface receives a large amount of powder flow into the mixing chamber, the compressed air pipeline and the industrial water pipeline start to supply compressed air and water, the compressed air enters the dispersion nozzle through the first connecting hose, the dispersion nozzle uses the kinetic energy of the compressed air to preliminarily disperse the added powder material in the mixing chamber, the industrial water of the atomizing gun is provided by the frequency conversion of the electric diaphragm metering pump, the pump outlet is provided with a back pressure valve and a pulse damper for stabilizing the pulse pressure of the output of the atomizing gun, the industrial water for humidification is stabilized, the water is further atomized into small water droplets by the atomizing gun, according to the amount of powder, the atomizing gun of the C interface adjusts the gas consumption and the flow of industrial water, in order to stabilize the water content, when the powder is more, the flow of industrial water and the gas supply pressure are increased at the same time, the powder is wetted and continues to flow downward to the diffusion homogenizing chamber, at the same time, the third connecting hose sends air into the diffusion homogenizing chamber to form an air wall to prevent the powder from sticking to the wall, under the guidance of the air wall, the gas-powder mixture flows down gently, the diffusion homogenizing chamber can ensure a short stay to make the water mist and the powder adsorb more uniformly, and finally all pass through the bottom separation shaftless screw machine to be stirred and mixed again and then discharged, and the finally output powder can obtain the desired water content;

[0009] By the settings of the mixing chamber, the diffusion homogenizing chamber and the separation shaftless screw machine, compressed air is used as the main mixing power source, the secondary stirring effect of the shaftless screw machine is adopted, the running energy consumption of the whole system can be reduced, the humidification efficiency is improved, the weight of the equipment itself is greatly reduced, the equipment structure is simple and stable. When the amount of the entering powder is stable, the final discharge can obtain a precisely controllable water content, and the single-layer nozzle humidification is suitable for small-flow powder humidification scenes.

[0010] Optionally, the industrial water pipeline and the compressed air pipeline are both provided with a ball valve for controlling the on-off.

[0011] By adopting the above technical scheme, the ball valve is installed on the industrial water pipeline and the compressed air pipeline; by the setting of the ball valve, the on-off of the industrial water and the compressed air is effectively controlled, the fluid flow in the pipeline can be conveniently opened or closed, and the precise control of the water and the gas in the humidification device is realized.

[0012] Optionally, a pressure reducing valve for controlling the pressure is arranged between any connecting hose and the industrial water pipeline.

[0013] By adopting the above technical scheme, the pressure reducing valve is installed on the three connecting hoses; by the setting of the pressure reducing valve, the pressure of the industrial water entering the connecting hose can be accurately controlled, the stability of the water flow is ensured, the flexibility is high, a variety of powder humidification scenes can be adapted, the possibility of damage to the connecting hose, the atomizing gun and other components caused by too high water pressure is reduced, the service life of the equipment is prolonged, and the downtime caused by equipment failure is reduced.

[0014] Optionally, a plurality of auxiliary branch pipes are communicated on the third connecting hose, and the plurality of auxiliary branch pipes are all communicated into the diffusion homogenizing chamber.

[0015] By adopting the above technical scheme, the plurality of auxiliary branch pipes are communicated on the third connecting hose; through the arrangement of the plurality of auxiliary branch pipes, the compressed air can be more evenly distributed into the diffusion homogenizing chamber, a more uniform air wall is formed, which helps to reduce the wall hanging of the powder, and ensures the sufficient mixing and homogenization of the powder and the atomized water in the homogenizing chamber.

[0016] Optionally, the plurality of auxiliary branch pipes are arranged in sequence and at intervals along the height direction of the diffusion homogenizing chamber.

[0017] By adopting the above technical scheme, the plurality of auxiliary branch pipes are arranged in sequence and at intervals along the height direction of the diffusion homogenizing chamber; through the arrangement mode of the auxiliary branch pipes, the uniform distribution of the compressed air in the three-dimensional space can be realized, which helps to ensure that the powder can be fully contacted and mixed with the atomized water at each height, improve the uniformity of the humidification effect, and at the same time, through the reasonable arrangement of the height and the interval of the auxiliary branch pipes, the flow path of the air in the diffusion homogenizing chamber can be optimized. This helps to further reduce the possibility of wall hanging of the powder.

[0018] Optionally, a stainless steel mesh plate for isolating the powder to prevent wall hanging is arranged in the diffusion homogenizing chamber, and the stainless steel mesh plate is connected to the inner wall of the diffusion homogenizing chamber.

[0019] By adopting the above technical scheme, the stainless steel mesh plate is installed on the inner wall of the diffusion homogenizing chamber; through the arrangement of the stainless steel mesh plate, the stainless steel mesh plate can be closely attached to the inner wall of the diffusion homogenizing chamber, forming an effective barrier to prevent the powder from directly contacting the chamber wall, reducing the adhesion and accumulation of the powder on the chamber wall, and thus reducing the occurrence of wall hanging.

[0020] Optionally, the angle of the feed inlet of the mixing chamber is greater than the repose angle of the powder, the top of the mixing chamber is in a horn shape, the horn mouth expansion angle of the mixing chamber is greater than the atomization angle of the atomizing lance, and the height of the mixing chamber is not less than the atomization distance of the atomizing lance.

[0021] By adopting the technical scheme, the feeding port angle of the mixing chamber is greater than the repose angle of the powder, the horn port expansion angle of the mixing chamber is greater than the atomization angle of the atomizing lance, and the height of the mixing chamber is not less than the atomization distance of the atomizing lance; through the setting of the mixing chamber structure, the feeding port angle of the mixing chamber is designed to be greater than the repose angle of the powder, which helps the powder to smoothly slide into the mixing chamber under the action of gravity and its own characteristics, the repose angle is the maximum angle formed when the material is in a stable state when freely piled up, and the feeding port angle greater than the repose angle can prevent the powder from piling up or forming an arch effect at the inlet, ensuring that the powder can continuously and stably enter the mixing chamber, the horn port expansion angle of the mixing chamber is greater than the atomization angle of the atomizing lance, which helps to enhance the mixing effect of the powder and the dispersed air, improve the humidification efficiency and mixing uniformity, and the height of the mixing chamber is designed to be not less than the atomization distance of the atomizing lance, which helps to prevent the powder from being hardened on the wall of the mixing chamber, and a suitable size can also reduce the possibility of dry powder escaping.

[0022] Optionally, the inner diameter of the outlet of the mixing chamber is the same as the inner diameter of the diffusion homogenizing chamber, and a flange piece for connection is arranged between the mixing chamber and the diffusion homogenizing chamber.

[0023] By adopting the technical scheme, the mixing chamber and the diffusion homogenizing chamber are connected through the flange piece; through the setting of the flange piece, the flange piece is a commonly used connecting piece, which has the characteristics of simple structure, reliable connection and good sealing performance, and the mixing chamber and the diffusion homogenizing chamber are connected through the flange piece, ensuring that the connection between the two is tight and leak-free, and reducing the possibility of water and powder leakage during the humidification process.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] Through the setting of the mixing chamber, the diffusion homogenizing chamber and the separation shaftless screw machine, compressed air is used as the main mixing power source, and the secondary stirring effect of the shaftless screw machine is used, which can reduce the operating energy consumption of the whole system, improve the humidification efficiency, greatly reduce the weight of the equipment, and the equipment structure is simple and stable. When the entering powder is quantified and stable, the final discharge can obtain a precise and controllable water content, and the single-layer nozzle humidification is suitable for small-flow powder humidification scenes;

[0026] The stainless steel mesh plate is installed on the inner wall of the diffusion homogenizing chamber; through the setting of the stainless steel mesh plate, the stainless steel mesh plate can be closely attached to the inner wall of the diffusion homogenizing chamber to form an effective barrier to prevent the powder from directly contacting the chamber wall, reduce the adhesion and accumulation of the powder on the chamber wall, and thus reduce the occurrence of the wall sticking phenomenon;

[0027] By setting the mixing chamber structure, the feeding port angle of the mixing chamber is designed to be greater than the repose angle of the powder, which helps the powder to smoothly slide into the mixing chamber under the action of gravity and its own characteristics. The repose angle is the maximum angle formed when the material is in a stable state when it is freely piled up. The feeding port angle greater than the repose angle can prevent the powder from piling up or forming an arch bridge effect at the inlet, ensuring that the powder can continuously and stably enter the mixing chamber. The horn mouth expansion angle of the mixing chamber is greater than the atomization angle of the atomizing lance, which helps to enhance the mixing effect of the powder and the dispersed air, improve the humidification efficiency and mixing uniformity, and the height of the mixing chamber is designed to be not less than the atomization distance of the atomizing lance, which helps to prevent the powder from hardening on the wall of the mixing chamber, and the appropriate size can also reduce the possibility of dry powder escaping. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a powder humidification device in the embodiment of the present application.

[0029] The reference signs are explained as follows: 1, mixing chamber; 2, diffusion homogenization chamber; 3, separation shaftless screw machine; 4, powder interface; 5, dispersion nozzle; 6, atomizing lance; 7, compressed air pipeline; 8, industrial water pipeline; 9, connecting hose; 10, electric diaphragm metering pump; 11, pulse damper; 12, back pressure valve; 13, ball valve; 14, pressure reducing valve; 15, auxiliary branch pipe; 16, stainless steel mesh plate; 17, flange. DETAILED DESCRIPTION

[0030] The following will be described in detail with reference to the accompanying drawings Figure 1 The present application is further described in detail.

[0031] The embodiment of the present application discloses a powder humidification device. Referring to Figure 1 , the powder humidification device comprises a mixing chamber 1 and a diffusion homogenization chamber 2, the mixing chamber 1 is communicated at the top of the diffusion homogenization chamber 2, and the bottom of the diffusion homogenization chamber 2 is communicated with a separation shaftless screw machine 3, the separation shaftless screw machine 3 is in a groove type structure, the top is a flat surface sealed by bolts, equipped with two observation ports, the internal structure considers the discharge of excess gas, and the internal volume is sufficient to ensure that the deposited powder is subjected to secondary homogenization mixing. In the embodiment, the whole humidification device can be equipped with two groups of mixing chambers 1 and diffusion homogenization chambers 2, and the combination functions of the two groups of mixing chambers 1 and diffusion homogenization chambers 2 are the same, and standby can be performed.

[0032] Referring to Figure 1, the outlet inner diameter of the mixing chamber 1 in the embodiment is the same as the inner diameter of the diffusion homogenizing chamber 2, flange pieces 17 are installed between the mixing chamber 1 and the diffusion homogenizing chamber 2, and the diffusion homogenizing chamber 2 and the separation shaftless spiral machine 3 are also equipped with flange pieces 17, the flange pieces 17 are commonly used connecting pieces, have the characteristics of simple structure, reliable connection and good sealing performance, the mixing chamber 1 and the diffusion homogenizing chamber 2, the diffusion homogenizing chamber and the separation shaftless spiral machine 3 are connected through the flange pieces 17, ensuring that the connection between the two is tight and leak-free, and reducing the possibility of water and powder leakage during humidification.

[0033] With reference to Figure 1 , the mixing chamber 1 is provided with a powder interface 4, a dispersion nozzle 5 and an atomizing spray gun 6 in sequence at the top, the powder interface 4 corresponds to the A interface of the mixing chamber 1, the dispersion nozzle 5 corresponds to the B interface of the mixing chamber 1, the atomizing spray gun 6 corresponds to the C interface of the mixing chamber 1, and the separation shaftless spiral machine 3 is equipped with a D interface; the powder interface 4 is used to receive a large amount of powder, the dispersion nozzle 5 is used to preliminarily disperse the added powder material in the mixing chamber 1 by using the kinetic energy of compressed air, and the atomizing spray gun 6 is used to wet the powder by using industrial water.

[0034] With reference to Figure 1 , the feeding port angle of the mixing chamber 1 is greater than the repose angle of the powder, which helps the powder to smoothly slide into the mixing chamber 1 under the action of gravity and its own characteristics. The repose angle is the maximum angle formed when the material is in a stable state when it is freely piled up. The feeding port angle greater than the repose angle can prevent the powder from accumulating or forming an arch bridge effect at the inlet, ensuring that the powder can continuously and stably enter the mixing chamber 1.

[0035] With reference to Figure 1 , the top of the mixing chamber 1 is trumpet-shaped, the trumpet opening expansion angle of the mixing chamber 1 is greater than the atomizing angle of the atomizing spray gun 6, and at the same time, the height of the mixing chamber 1 is not less than the atomizing distance of the atomizing spray gun 6; which helps to enhance the mixing effect of the powder and the dispersion air, improve the humidification efficiency and mixing uniformity, and the height of the mixing chamber 1 is designed to be not less than the atomizing distance of the atomizing spray gun 6, which helps to prevent the powder from hardening on the wall of the mixing chamber 1, and at the same time, the appropriate size can also reduce the possibility of dry powder escaping.

[0036] With reference to Figure 1 , a compressed air pipeline 7 and an industrial water pipeline 8 are installed on one side of the mixing chamber 1, the compressed air pipeline 7 is used to provide compressed air in the embodiment, the industrial water pipeline 8 is used to provide industrial water, the compressed air pipeline 7 is communicated with the industrial water pipeline 8, and ball valves 13 for controlling the on-off are installed on the industrial water pipeline 8 and the compressed air pipeline 7; the ball valves 13 are installed on the industrial water pipeline 8 and the compressed air pipeline 7; the on-off of the industrial water and the compressed air is effectively controlled through the ball valves 13, the fluid flow in the pipeline can be conveniently opened or closed, and accurate control of water and gas in the humidification device is realized.

[0037] With reference to Figure 1 , three connecting hoses 9 are communicated with the compressed air pipeline 7, the first connecting hose 9 is installed on the dispersion nozzle 5, the second connecting hose 9 is installed on the atomizing spray gun 6, and the second connecting hose 9 is sequentially provided with an electric diaphragm metering pump 10, a pulse damper 11 and a back pressure valve 12, the industrial water of the atomizing spray gun 6 is provided by frequency conversion through the electric diaphragm metering pump 10, the back pressure valve 12 and the pulse damper 11 for stabilizing the pulse pressure are installed at the pump outlet, the industrial water for humidification is stably output by the atomizing spray gun 6, the water is further atomized into tiny water droplets by the atomizing spray gun 6, and the third connecting hose 9 is communicated into the diffusion homogenizing chamber 2.

[0038] With reference to Figure 1 , a pressure reducing valve 14 is installed between any connecting hose 9 and the industrial water pipeline 8, in the embodiment, the compressed air pipeline 7, the industrial water pipeline 8, the ball valve 13, the pressure reducing valve 14, the connecting hose 9, the electric diaphragm metering pump 10, the pulse damper 11 and the back pressure valve 12 are connected with each other by a wire head, and the two ends of the connecting hose 9 are provided with a loose joint, so that the pipeline and the main body equipment can be conveniently matched on site; the pressure reducing valve 14 can accurately control the pressure of the industrial water entering the connecting hose 9, ensure the stability of the water flow, has high flexibility, can adapt to various powder humidification scenes, reduce the possibility of damage to the connecting hose 9, the atomizing spray gun 6 and other components caused by excessive water pressure, help to prolong the service life of the equipment, and reduce the downtime caused by equipment failure.

[0039] With reference to Figure 1 , in the embodiment, a plurality of auxiliary branch pipes 15 are communicated with the third connecting hose 9, the plurality of auxiliary branch pipes 15 are communicated into the diffusion homogenizing chamber 2, and the plurality of auxiliary branch pipes 15 are arranged along the height direction of the diffusion homogenizing chamber 2 in sequence, in the embodiment, the third connecting hose 9 and the plurality of auxiliary branch pipes 15 are arranged along the circumferential direction of the outer wall of the diffusion homogenizing chamber 2, so that the compressed air can be more uniformly distributed into the diffusion homogenizing chamber 2, a more uniform air wall is formed, which helps to reduce the wall hanging of the powder, and ensures the full mixing and homogenization of the powder and the atomized water in the homogenizing chamber.

[0040] With reference to Figure 1 , a stainless steel mesh plate 16 is installed inside the diffusion homogenizing chamber 2, in the embodiment, the stainless steel mesh plate 16 is installed on the inner wall of the diffusion homogenizing chamber 2 by welding, the stainless steel mesh plate 16 is arranged along the circumferential direction of the inner wall of the diffusion homogenizing chamber 2, and the stainless steel mesh plate 16 has a plurality of fine holes; the stainless steel mesh plate 16 can be closely attached to the inner wall of the diffusion homogenizing chamber 2 to form an effective barrier, preventing the powder from directly contacting the chamber wall, reducing the adhesion and accumulation of the powder on the chamber wall, and thus reducing the occurrence of wall hanging.

[0041] The implementation principle of the powder humidifying device is as follows: when the powder is humidified, the powder interface 4 receives a large amount of powder flowing into the mixing chamber 1, the compressed air pipeline 7 and the industrial water pipeline 8 start to supply compressed air and water, the compressed air enters the dispersion nozzle 5 through the first connecting hose 9, the dispersion nozzle 5 uses the kinetic energy of the compressed air to preliminarily disperse the added powder material in the mixing chamber 1, the industrial water of the atomizing spray gun 6 is provided by the frequency conversion of the electric diaphragm metering pump 10, the pump outlet is provided with a back pressure valve 12 and a pulse damper 11 to stabilize the pulse pressure of the output of the atomizing spray gun 6, the industrial water for humidification is further atomized into small water droplets by the atomizing spray gun 6, according to the amount of the powder, the atomizing spray gun 6 of the C interface adjusts the gas consumption and the industrial water flow, in order to stabilize the water content, when the powder is more, the industrial water flow and the air supply pressure are increased at the same time, the powder is wetted and continues to flow downward to the diffusion homogenizing chamber 2, at the same time, the third connecting hose 9 sends air into the diffusion homogenizing chamber 2 to form an air wall to prevent the powder from sticking to the wall, under the guidance of the air wall, the gas-powder mixture flows down gently, the diffusion homogenizing chamber 2 can ensure a short stay to make the water mist and the powder more uniform, finally all pass through the bottom separation shaftless screw machine 3 to be stirred again and discharged, and the finally output powder can obtain the desired water content.

[0042] By means of the mixing chamber 1, the diffusion homogenizing chamber 2 and the separation shaftless screw machine 3, compressed air is used as the main mixing power source, and the secondary stirring effect of the shaftless screw machine can reduce the operation energy consumption of the whole system, improve the humidifying efficiency, greatly reduce the weight of the device, and the device structure is simple and stable. When the amount of the entering powder is stable, the final discharge can obtain the precise and controllable water content, and the single-layer nozzle humidification is suitable for the scene of small-flow powder humidification.

[0043] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A powder humidifying device, characterized by: Including mixing chamber (1) and diffusion homogenization chamber (2), the mixing chamber (1) is communicated at the top of the diffusion homogenization chamber (2), the bottom of the diffusion homogenization chamber (2) is communicated with the separation shaftless screw machine (3), the top of the mixing chamber (1) is sequentially provided with the powder interface (4), the dispersion nozzle (5) and the atomizing spray gun (6), one side of the mixing chamber (1) is provided with the compressed air pipeline (7) and the industrial water pipeline (8), the compressed air pipeline (7) is communicated with the industrial water pipeline (8), three connecting hoses (9) are communicated on the compressed air pipeline (7), the first connecting hose (9) is connected on the dispersion nozzle (5), the second connecting hose (9) is connected on the atomizing spray gun (6), the second connecting hose (9) is sequentially provided with the electric diaphragm metering pump (10), the pulse damper (11) and the back pressure valve (12), the third connecting hose (9) is communicated into the diffusion homogenization chamber (2).

2. A powder humidifying device according to claim 1, characterized in that: The industrial water pipeline (8) and the compressed air pipeline (7) are both provided with ball valves (13) for controlling on-off.

3. A powder humidifying device according to claim 2, characterized in that: The pressure reducing valve (14) is arranged between any connecting hose (9) and the industrial water pipeline (8) for controlling pressure.

4. A powder humidifying device according to claim 1, characterized in that: The third connecting hose (9) is communicated with a plurality of auxiliary branch pipes (15), and the plurality of auxiliary branch pipes (15) are all communicated into the diffusion homogenization chamber (2).

5. A powder humidifying device according to claim 4, characterized in that: The plurality of auxiliary branch pipes (15) are arranged along the height direction of the diffusion homogenization chamber (2) in sequence.

6. A powder humidifying device according to claim 4, characterized in that: The diffusion homogenization chamber (2) is provided with a stainless steel mesh plate (16) inside for isolating powder to prevent wall hanging, and the stainless steel mesh plate (16) is connected to the inner wall of the diffusion homogenization chamber (2).

7. A powder humidifying device according to claim 1, characterized in that: The angle of the feed inlet of the mixing chamber (1) is greater than the repose angle of the powder, the top of the mixing chamber (1) is trumpet-shaped, the trumpet mouth expansion angle of the mixing chamber (1) is greater than the atomization angle of the atomizing spray gun (6), and the height of the mixing chamber (1) is not less than the atomization distance of the atomizing spray gun (6).

8. A powder humidifying device according to claim 7, characterized in that: The inner diameter of the outlet of the mixing chamber (1) is the same as the inner diameter of the diffusion homogenization chamber (2), and the flange (17) for connection is arranged between the mixing chamber (1) and the diffusion homogenization chamber (2).

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