CN112247155A - Gas preheating device for metal powder atomization preparation - Google Patents

Gas preheating device for metal powder atomization preparation Download PDF

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Publication number
CN112247155A
CN112247155A CN202010892537.9A CN202010892537A CN112247155A CN 112247155 A CN112247155 A CN 112247155A CN 202010892537 A CN202010892537 A CN 202010892537A CN 112247155 A CN112247155 A CN 112247155A
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heat exchange
box body
gas
threshold value
metal powder
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CN202010892537.9A
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Chinese (zh)
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聂浩静
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Individual
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Priority to CN202010892537.9A priority Critical patent/CN112247155A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0832—Handling of atomising fluid, e.g. heating, cooling, cleaning, recirculating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0888—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid casting construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control

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Abstract

The invention discloses a gas preheating device for atomization preparation of metal powder, and belongs to the technical field of preparation of metal powder. The technical scheme of the invention is as follows: the air with heat discharged by the prepared metal powder is recycled, and the heat is recycled, so that the energy loss is reduced, the heat utilization rate is improved, and the production cost is favorably reduced; the gas entering in the heat exchange process is fully contacted with the rotary heat exchange body, so that the heat of the rotary heat exchange body can be taken away by the gas in a short time, and the heat exchange efficiency is improved; on one hand, the temperature control unit can control the flow of gas, so that the temperature of the gas discharged from the heat exchange box body is stabilized in a preset threshold value, the heat exchange efficiency with tail gas is ensured, the heat is fully absorbed, the heat loss is avoided, and the conversion rate is improved; on the other hand, the control unit also adjusts the power of the heating element according to the temperature change in the heating box body, so that the internal constant temperature is kept, the system construction is safer and more stable, and a sufficient temperature environment is provided for the metal powder production.

Description

Gas preheating device for metal powder atomization preparation
Technical Field
The invention belongs to the technical field related to metal powder preparation, and particularly relates to a gas preheating device for metal powder atomization preparation.
Background
Powder metallurgy is a process technology for manufacturing metal materials, composite materials and various products by preparing metal powder or using metal powder as a raw material and forming and sintering the metal powder, becomes a key for solving the problem of new materials, and plays a very important role in the development of the new materials.
At present, a high-pressure gas atomization method with a crucible is mainly adopted for preparing metal powder at home and abroad. However, the gas used by the existing metal powder gas atomization equipment is inert gas with higher cost, and if the gas can be heated and the constant temperature can be controlled, the gas consumption of the atomization gas can be saved, and the stability of the production process can also be ensured; in addition, the heat of molten steel absorbed by the atomized gas at present is changed into high-temperature gas, and then the high-temperature gas is directly discharged to the outside air, so that a large amount of energy is lost and wasted.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention aims to provide a gas preheating device for metal powder atomization preparation, so that gas can be heated and the constant temperature can be controlled, the gas consumption of the atomized gas is saved, and the stability of the production process can be ensured; and the problem that a large amount of energy is lost and wasted because the heat of molten steel is absorbed after atomization of the existing atomization gas and is directly discharged to the outside air after the heat is changed into high-temperature gas is solved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a gas preheating device for metal powder atomization preparation comprises a heat exchange box body, a gas inlet pipe, a hot gas outlet pipe and a heating box body; the gas inlet pipe is communicated with the side wall of the heat exchange box body, the inner end of the gas inlet pipe in the heat exchange box body faces to the horizontal direction, the heat exchange box body is communicated with the heating box body through a pipeline, the other side of the heating box body is communicated with a hot gas outlet pipe, and a heating element is arranged in the heating box body and is used for heating gas entering the heating box body, so that the temperature of the gas meets the preparation requirement of metal powder; the heat exchange box body is internally provided with a vertical rotary heat exchange body which rotates around the central shaft of the heat exchange box body, the rotary heat exchange body is of a hollow structure, the upper end of the rotary heat exchange body is communicated with a tail gas inlet pipe, the lower end of the rotary heat exchange body is communicated with a tail gas outlet pipe, and the tail gas inlet pipe and the tail gas outlet pipe are both rotatably connected to the heat exchange box body through bearings;
a circle of inwards-sunken blowing grooves are formed in the outer side wall of the rotary heat exchange body horizontally corresponding to the air inlet pipe, and gas blown into the heat exchange box body by the air inlet pipe is directly blown into the blowing grooves;
the lateral wall of the air blowing groove is communicated with a plurality of shunting grooves distributed along the lateral wall of the rotary heat exchange body, the other end of each shunting groove penetrates out from the upper end and the lower end of the corresponding rotary heat exchange body, the shunting grooves are obliquely arranged and incline along the rotating direction of the rotary heat exchange body, the gas flowability in the shunting grooves is ensured, and gas blown in through the shunting grooves is drained to two sides, so that the contact time of the gas and the rotary heat exchange body is long, and the heat on the rotary heat exchange body is convenient to absorb.
One side of the heat exchange box body corresponding to the heating element is provided with a disperser which uniformly blows gas in the heat exchange box body on the heating element, and the other side of the heat exchange box body is provided with a collector communicated with the hot gas outlet pipe, so that the heated gas is collected and sent out.
The system also comprises a temperature control unit, wherein the temperature control unit comprises a first flow valve arranged on the air inlet pipe, a second flow valve arranged on the tail gas pipe, a third flow valve arranged on the hot gas outlet pipe, a temperature sensor A arranged in the heat exchange box body, a temperature sensor B arranged in the heating box body and a controller electrically connected with the components.
The temperature sensor A acquires temperature information in the heat exchange box body, transmits the temperature information to the controller, and compares and judges the temperature information through a threshold value set by the controller and the temperature information of the temperature sensor A, wherein the threshold values are a highest threshold value of the heat exchange box body and a lowest threshold value of the heat exchange box body; when the temperature information of the temperature sensor A is lower than the lowest threshold value of the heat exchange box body, the controller controls the first flow valve and the third flow valve to reduce the opening to reduce the flow, the second flow valve increases the opening to improve the flow, so that the gas to be preheated entering the interior is reduced, and the entering amount of waste gas is increased; when the temperature information of the temperature sensor A is between the highest threshold value and the lowest threshold value of the heat exchange box body, the first flow valve, the second flow valve and the third flow valve keep the current state unchanged;
the temperature sensor B acquires temperature information in the heating box body, transmits the temperature information to the controller, and compares and judges the temperature information through a threshold value set by the controller and the temperature information of the temperature sensor B, wherein the threshold values are a highest threshold value and a lowest threshold value of the heating box body, and when the temperature information of the temperature sensor B is higher than the highest threshold value of the heating box body, the controller controls the heating element to reduce heating power; when the temperature information of the temperature sensor B is lower than the lowest threshold value of the heating box body, the controller controls the heating element to improve the heating power; when the temperature information of the temperature sensor B is between the highest threshold value and the lowest threshold value of the heating box body, the heating element keeps the existing heating power unchanged.
Each corresponding splitter box in the air blowing groove is fixedly provided with a flow baffle, the side surface of the flow baffle is flush with the rear side surface (the front side along the rotating direction of the rotary heat exchange body) of the splitter box, the top of the flow baffle is higher than the bottom of the corresponding splitter box, and the height of the flow baffle is smaller than that of the air blowing groove, so that air can flow conveniently.
Wherein, be fixed with the round heat conduction ring on the slot position of blowing that corresponds on the inner wall of the rotatory heat transfer body, the heat conductivity of heat conduction ring is greater than the heat conductivity of the rotatory heat transfer body all be provided with the bump on the inner wall of the rotatory heat transfer body and on the inner wall of heat conduction ring, make its and inside tail gas area of contact increase, be convenient for absorb more heats.
The side wall of the tail gas inlet pipe is coaxially fixed with a driven gear, one side of the driven gear is connected with a driving gear in a meshed mode, a central shaft of the driving gear is fixedly connected to an output shaft of a motor, the tail gas inlet pipe is driven to rotate through the motor, and therefore the rotary heat exchange body is rotated to drive the rotary heat exchange body to rotate.
The tail gas inlet box is fixed to the top of the heat exchange box body corresponding to the tail gas inlet pipe, the tail gas inlet pipe extends upwards into the tail gas inlet box, the tail gas pipe is communicated with one side of the tail gas inlet box, the tail gas pipe is communicated with the exhaust pipe of the metal powder preparation device, and the tail gas with heat is sent into the tail gas inlet box to utilize the heat in the tail gas.
Compared with other methods, the method has the beneficial technical effects that:
according to the invention, the air with heat discharged by the prepared metal powder is recycled, the heat in the air is absorbed, and the heat is recycled, so that the energy loss is reduced, the heat utilization rate is improved, the effects of energy conservation and emission reduction are achieved, the sustainable development of modern enterprises is met, and the production cost of the enterprises is reduced; the gas entering in the heat exchange process is fully contacted with the rotary heat exchange body, so that the heat on the rotary heat exchange body can be taken away by the gas in a short time, the heat exchange efficiency is improved, and the heat can be reused; on one hand, the temperature control unit can control the flow of gas, so that the temperature of the gas discharged from the heat exchange box body is stabilized in a preset threshold value, the heat exchange efficiency with tail gas is ensured, the heat is fully absorbed, the heat loss is avoided, and the conversion rate is improved; on the other hand, the control unit also adjusts the power of the heating element according to the temperature change in the heating box body, so that the internal constant temperature is kept, the system construction is safer and more stable, and a sufficient temperature environment is provided for the metal powder production.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic view of the structure taken along the line A-A in FIG. 1;
FIG. 3 is a schematic view of the structure taken along the line B-B in FIG. 1;
1. a heat exchange box body; 2. an air inlet pipe; 3. a hot gas outlet pipe; 4. heating the box body; 5. rotating the heat exchange body; 6. a tail gas inlet pipe; 7. a tail gas inlet box; 8. a tail gas pipe; 9. a bearing; 10. a tail gas outlet pipe; 11. a motor; 12. a driving gear; 13. a driven gear; 14. a blowing slot; 15. a flow baffle plate; 16. a shunt slot; 17. a heat conducting ring; 18. salient points; 19. a disperser; 20. a collector; 21. a heating element; 22. a first flow valve; 23. a second flow valve; 24. a third flow valve; 25. a temperature sensor A; 26. a controller; 27. and a temperature sensor B.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The words "upper", "lower", "left" and "right" when used herein are merely intended to designate corresponding upper, lower, left and right directions in the drawings, and do not limit the structure thereof.
The gas preheating device for metal powder atomization preparation shown in fig. 1-3 comprises a heat exchange box body 1, a gas inlet pipe 2, a hot gas outlet pipe 3 and a heating box body 4; the gas inlet pipe 2 is communicated with the side wall of the heat exchange box body 1, the inner end of the gas inlet pipe 2 in the heat exchange box body 1 faces the horizontal direction, so that gas entering the gas inlet pipe 2 is blown out horizontally, the heat exchange box body 1 is communicated with the heating box body 4 through a pipeline, the gas in the heat exchange box body 1 is sent into the heating box body 4, the hot gas outlet pipe 3 is communicated with the other side of the heating box body 4, a heating element 21 is installed in the heating box body 4, the gas entering the heating box body 4 is heated, and the temperature of the gas meets the preparation requirement of metal powder; a vertical rotary heat exchange body 5 rotating around the central shaft of the heat exchange box body 1 is arranged in the heat exchange box body 1, the rotary heat exchange body 5 is of a hollow structure, the upper end of the rotary heat exchange body is communicated with a tail gas inlet pipe 6, the lower end of the rotary heat exchange body is communicated with a tail gas outlet pipe 10, the tail gas inlet pipe 6 and the tail gas outlet pipe 10 are both rotatably connected to the heat exchange box body 1 through bearings 9, and the rotary heat exchange body 5, the tail gas inlet pipe 6 and the tail; a circle of inwards-concave blowing grooves 14 are formed in the outer side wall of the rotary heat exchange body 5 horizontally corresponding to the air inlet pipe 2, the depth of each blowing groove 14 is within the range of 20-40 mm, and gas blown into the heat exchange box body 1 by the air inlet pipe 2 is directly blown into each blowing groove 14; the side wall of the air blowing groove 14 is communicated with a plurality of shunting grooves 16 distributed along the side wall of the rotary heat exchanger 5, the other ends of the shunting grooves 16 penetrate out of the upper end and the lower end of the corresponding rotary heat exchanger 5 to ensure the fluidity of the gas in the shunting grooves 16, and the blown gas is guided to two sides through the shunting grooves 16, so that the contact time of the gas and the rotary heat exchanger 5 is long, and the heat on the rotary heat exchanger 5 is convenient to absorb; the diversion channel 16 is obliquely arranged and is inclined along the rotating direction of the rotary heat exchange body 5, so that the fluidity of the internal gas is improved.
The side wall of the tail gas inlet pipe 6 is coaxially fixed with a driven gear 13, one side of the driven gear 13 is engaged and connected with a driving gear 12, a central shaft of the driving gear 12 is fixedly connected to an output shaft of a motor 11, and the tail gas inlet pipe 6 is driven to rotate through the motor 11, so that the rotary heat exchange body 5 rotates to drive the rotary heat exchange body to rotate.
The heat transfer box 1 top that tail gas intake pipe 6 corresponds is fixed with tail gas inlet box 7, and in tail gas intake pipe 6 upwards stretched into tail gas inlet box 7, tail gas in the tail gas inlet box 7 can enter into tail gas intake pipe 6, intercommunication tail gas pipe 8 on one side of tail gas inlet box 7, and tail gas pipe 8 and metal powder preparation facilities's blast pipe intercommunication will have during thermal tail gas is sent into tail gas inlet box 7, utilizes the heat in the tail gas.
Install heating element 21 in the heating box 4, heating element 21 corresponds heat exchange box 1 one side sets up deconcentrator 19, with the gas in the heat exchange box 1 even blow on heating element 21, be equipped with on one side in addition with the collector 20 of hot gas outlet duct 3 intercommunication, the gas after will heating is collected and is seen off.
The system is provided with a temperature control unit which comprises a first flow valve 22 arranged on an air inlet pipe 2, a second flow valve 23 arranged on an exhaust pipe 8, a third flow valve 24 arranged on a hot air outlet pipe 3, a temperature sensor A25 arranged in a heat exchange box body 1, a temperature sensor B27 arranged in a heating box body 4 and a controller 26 electrically connected with the above components.
The temperature sensor A25 acquires temperature information in the heat exchange box body 1, the temperature information is transmitted to the controller 26, the threshold value set by the controller 26 is compared with the temperature information of the temperature sensor A25 for judgment, the threshold value is the highest threshold value of the heat exchange box body and the lowest threshold value of the heat exchange box body, when the temperature information of the temperature sensor A25 is higher than the highest threshold value of the heat exchange box body, the controller 26 controls the first flow valve 22 and the third flow valve 24 to increase the opening and improve the flow, controls the second flow valve 23 to reduce the opening and reduce the flow, so that gas entering the interior to be preheated is increased, the amount of waste gas is reduced, and more preheated gas is generated; when the temperature information of the temperature sensor A25 is lower than the lowest threshold value of the heat exchange box body, the controller 26 controls the first flow valve 22 and the third flow valve 24 to reduce the opening to reduce the flow, and the second flow valve 23 increases the opening to improve the flow, so that the gas to be preheated entering the interior is reduced, the entering amount of the waste gas is increased, and more heat is provided; when the temperature information of the temperature sensor a25 is between the highest threshold value and the lowest threshold value of the heat exchange box, the first flow valve 22, the second flow valve 23 and the third flow valve 24 are kept unchanged, so that the gas enters the heating box 4 from the heat exchange box 1 at a stable temperature.
The temperature sensor B27 acquires temperature information in the heating box body 4, transmits the temperature information to the controller 26, compares and judges the threshold value set by the controller 26 with the temperature information of the temperature sensor B27, the threshold value is a highest threshold value of the heating box body and a lowest threshold value of the heating box body, the highest threshold value of the heating box body is 100 ℃, the lowest threshold value of the heating box body is 80 ℃, when the temperature information of the temperature sensor B27 is higher than the highest threshold value of the heating box body, the controller 26 controls the heating element 21 to reduce the heating power and reduce the generation of heat, thereby reducing the energy consumption of the heating element 21, when the temperature information of the temperature sensor B27 is lower than the lowest threshold value of the heating box body, the controller 26 controls the heating element 21 to increase the heating power and increase the generation of heat, when the temperature information of the temperature sensor B27 is between the highest threshold value of the heating box body and the lowest threshold, the heating element 21 keeps the existing heating power unchanged, ensures the temperature of the delivered air to be constant and provides stable gas for production.
A flow baffle plate 15 is fixed at each corresponding splitter box 16 in the blowing slot 14, the side surface of the flow baffle plate 15 is flush with the rear side surface (front along the rotation direction of the rotary heat exchange body) of the splitter box 16, and the gas blown on the flow baffle plate 15 is guided into the corresponding splitter box 16 to play a role in guiding the flow and prevent the gas from flowing along the blowing slot 14; the top of the flow baffle 15 is higher than the bottom of the corresponding splitter box 16, and the height of the flow baffle 15 is less than that of the air blowing box 14, so that the air flow is facilitated.
A circle of heat conducting rings 17 are fixed on the positions, corresponding to the air blowing grooves 14, of the inner wall of the rotary heat exchange body 5, the heat conducting rings 17 are higher than the heat conducting rings of the rotary heat exchange body 5 in heat conduction, so that the heat conducting rings 17 absorb heat and send more heat into the air blowing grooves 14, and salient points 18 are arranged on the inner wall of the rotary heat exchange body 5 and the inner wall of the heat conducting rings 17, so that the contact area between the rotary heat exchange body and the tail gas inside the rotary heat exchange body is increased, and more heat can be absorbed conveniently.
Have thermal tail gas discharge with inside in the metal powder atomizing preparation facilities, communicate with tail gas pipe 8 of this system, send into inside with tail gas, tail gas flows in rotatory heat transfer body 5, absorb the heat through rotatory heat transfer body 5, and to diffusion in the heat transfer box 1, rotatory heat transfer body 5 rotates and the gas contact of blowing in, make the quick diffusion of heat to in the surrounding gas, the mobility reinforcing of the gas that the blowpit 14 and the splitter box 16 of seting up made on the rotatory heat transfer body 5 made, contact heat transfer area has been increased simultaneously, be favorable to the gaseous heat absorption that gets into, heat after the heat transfer is sent into and is heated in the heating box 4, make gas temperature accord with the preparation needs.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (9)

1. A gas preheating device for metal powder atomization preparation comprises a heat exchange box body (1), a gas inlet pipe (2), a hot gas outlet pipe (3) and a heating box body (4); the heat exchange device is characterized in that the heat exchange box body (1) is internally provided with a vertical rotary heat exchange body (5) rotating around the central shaft of the heat exchange box body (1), the rotary heat exchange body (5) is internally of a hollow structure, the upper end of the rotary heat exchange body is communicated with a tail gas inlet pipe (6), the lower end of the rotary heat exchange body is communicated with a tail gas outlet pipe (10), and the tail gas inlet pipe (6) and the tail gas outlet pipe (10) are rotatably connected to the heat exchange box body (1) through bearings (9); a circle of inwards concave air blowing grooves (14) are formed in the outer side wall of the rotary heat exchange body (5) which horizontally corresponds to the air inlet pipe (2); the side wall of the air blowing groove (14) is communicated with a plurality of shunting grooves (16) distributed along the side wall of the rotary heat exchange body (5), and the other ends of the shunting grooves (16) penetrate out from the upper end and the lower end of the corresponding rotary heat exchange body (5); the device also comprises a temperature control unit, wherein the temperature control unit comprises a first flow valve (22) arranged on the air inlet pipe (2), a second flow valve (23) arranged on the tail gas pipe (8), a third flow valve (24) arranged on the hot gas outlet pipe (3), a temperature sensor A (25) arranged in the heat exchange box body (1), a temperature sensor B (27) arranged in the heating box body (4) and a controller (26) electrically connected with the above components; the temperature sensor A (25) acquires temperature information in the heat exchange box body (1), the temperature information is transmitted to the controller (26), a threshold value set by the controller (26) is compared with the temperature information of the temperature sensor A (25) to judge, the threshold value is a highest threshold value of the heat exchange box body and a lowest threshold value of the heat exchange box body, when the temperature information of the temperature sensor A (25) is higher than the highest threshold value of the heat exchange box body, the controller (26) controls the first flow valve (22) and the third flow valve (24) to increase openings and increase flow, and controls the second flow valve (23) to reduce the openings and reduce flow, so that gas entering the interior to be preheated is increased, and the waste gas amount is reduced; when the temperature information of the temperature sensor A (25) is lower than the lowest threshold value of the heat exchange box body, the controller (26) controls the first flow valve (22) and the third flow valve (24) to reduce the opening and reduce the flow, the second flow valve (23) increases the opening and improves the flow, so that the gas to be preheated entering the interior is reduced, and the entering amount of waste gas is increased; when the temperature information of the temperature sensor A (25) is between the highest threshold value and the lowest threshold value of the heat exchange box body, the first flow valve (22), the second flow valve (23) and the third flow valve (24) keep the current states unchanged; the temperature sensor B (27) acquires temperature information in the heating box body (4), the temperature information is transmitted to the controller (26), a threshold value set by the controller (26) is compared with the temperature information of the temperature sensor B (27) to judge, the threshold values are a highest threshold value of the heating box body and a lowest threshold value of the heating box body, and when the temperature information of the temperature sensor B (27) is higher than the highest threshold value of the heating box body, the controller (26) controls the heating element (21) to reduce heating power; when the temperature information of the temperature sensor B (27) is lower than the lowest threshold value of the heating box body, the controller (26) controls the heating element (21) to increase the heating power; when the temperature information of the temperature sensor B (27) is between the highest threshold value and the lowest threshold value of the heating box body, the heating element (21) keeps the existing heating power unchanged.
2. The gas preheating device for atomization production of metal powder according to claim 1, wherein the distribution chute (16) is disposed obliquely and is inclined in the rotating direction of the rotating heat-exchange body (5).
3. The gas preheater for atomization production of metal powder according to claim 2, wherein a baffle plate (15) is fixed to each of the respective splitter grooves (16) in the blowtank (14), and a side surface of the baffle plate (15) is flush with a rear side surface of the splitter groove (16).
4. The gas preheating device for atomization production of metal powder according to claim 3, wherein the top of the baffle plate (15) is higher than the bottom of the corresponding splitter box (16), and the height of the baffle plate (15) is smaller than the height of the blowing box (14).
5. The gas preheating device for preparing atomized metal powder as recited in any one of claims 1 to 4, wherein a ring of heat conducting rings (17) is fixed on the inner wall of the rotary heat exchanger (5) at a position corresponding to the position of the air blowing slot (14), the heat conducting rings (17) have a thermal conductivity greater than that of the rotary heat exchanger (5), and the protrusions (18) are disposed on the inner wall of the rotary heat exchanger (5) and the inner wall of the heat conducting rings (17).
6. The gas preheating device for preparing atomized metal powder as claimed in claim 5, wherein a driven gear (13) is coaxially fixed on the side wall of the tail gas inlet pipe (6), a driving gear (12) is engaged and connected to one side of the driven gear (13), and a central shaft of the driving gear (12) is fixedly connected to an output shaft of the motor (11).
7. The gas preheating device for preparing atomized metal powder as recited in claim 6, wherein a tail gas inlet box (7) is fixed to the top of the heat exchange box body (1) corresponding to the tail gas inlet pipe (6), the tail gas inlet pipe (6) extends upwards into the tail gas inlet box (7), and a tail gas pipe (8) is communicated with one side of the tail gas inlet box (7).
8. The gas preheating device for preparing atomized metal powder as claimed in claim 1, wherein a diffuser (19) is disposed on one side of the heat exchange box (1) corresponding to the heating element (21) to uniformly blow the gas in the heat exchange box (1) onto the heating element (21), and a collector (20) is disposed on the other side and is communicated with the hot gas outlet pipe (3).
9. The gas preheating device for atomization production of metal powder according to claim 1, wherein the maximum threshold value of the heating box is 100 ℃ and the minimum threshold value is 80 ℃.
CN202010892537.9A 2020-08-31 2020-08-31 Gas preheating device for metal powder atomization preparation Pending CN112247155A (en)

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CN202010892537.9A CN112247155A (en) 2020-08-31 2020-08-31 Gas preheating device for metal powder atomization preparation

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Application Number Priority Date Filing Date Title
CN202010892537.9A CN112247155A (en) 2020-08-31 2020-08-31 Gas preheating device for metal powder atomization preparation

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