CN109847675B - Plasma powder preparation device - Google Patents
Plasma powder preparation device Download PDFInfo
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- CN109847675B CN109847675B CN201910330154.XA CN201910330154A CN109847675B CN 109847675 B CN109847675 B CN 109847675B CN 201910330154 A CN201910330154 A CN 201910330154A CN 109847675 B CN109847675 B CN 109847675B
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- 239000000843 powder Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000010438 heat treatment Methods 0.000 claims abstract description 69
- 238000010791 quenching Methods 0.000 claims abstract description 41
- 230000000171 quenching effect Effects 0.000 claims abstract description 25
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims description 26
- 239000000498 cooling water Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 4
- 210000002381 plasma Anatomy 0.000 abstract description 66
- 239000000428 dust Substances 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
Abstract
The invention provides a plasma powder preparation device, which comprises a quenching tower, a heating chamber and a plasma torch, wherein the plasma torch is arranged at the upper end of the heating chamber, the upper end of the heating chamber is also provided with a feeding pipe, and the lower end of the heating chamber is connected with the quenching tower, and the plasma powder preparation device is characterized in that: the lower extreme of quench tower is equipped with powder collection device, and powder collection device's bin outlet sets up the sack and filters the separator, and powder collection device lower extreme is equipped with feed bin plugging device. According to the invention, the cloth bag filter separator and the bin plugging device are adopted to collect the plasmas, the cloth bag filter separator is convenient for collecting dust, and the bin plugging device is arranged, so that the scattering of the dust is effectively reduced, the pollution to the environment is reduced, and the collection efficiency of the plasmas is improved; the bin plugging device is provided with the collecting bin and the water tank, so that the scattering of dust is further reduced, the collection rate is conveniently improved, and meanwhile, the influence of pressure difference inside and outside the quenching tower on the collection of plasma powder is effectively solved.
Description
Technical Field
The invention relates to a technology for preparing powder by plasma, in particular to a plasma powder preparation device.
Background
A plasma torch is a device that converts electrical energy directly into plasma. The catalyst has the characteristics of high energy density and high activity, the center temperature is extremely high to tens of thousands of ℃, the average temperature can reach 5000 ℃, no combustion or oxidation reaction exists, the high temperature is realized by directly using electric energy, and the reaction process can be accelerated. The principle of preparing powder by using plasma is that the powder raw material fed into the powder raw material is quickly heated, melted or gasified by using high-temperature flame generated by thermal plasma, or the melted powder particles are quickly contracted into spherical particles under the action of surface tension and quick cooling along with chemical reaction along with the powder material being brought out of a plasma high-temperature area by airflow, and the principle can be used for the reaction of the powder material, the preparation of spheroidization and the like, however, in the preparation process, the plasma is collected by adopting a plurality of layers of cyclones, so that the powder is often not ideal in effect, more in dust and has environmental influence.
Disclosure of Invention
The object of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide a plasma powder preparation device which facilitates plasma collection, improves collection rate and is environmentally friendly.
The technical scheme of the invention is as follows: the utility model provides a plasma powder preparation facilities, includes quench tower, heating chamber and plasma torch, and the upper end of heating chamber is located to the plasma torch, and the heating chamber upper end still is equipped with the inlet pipe, and the quench tower is connected to the lower extreme of heating chamber, and the lower extreme of quench tower is equipped with powder collection device, and powder collection device's bin outlet sets up sack filtration separator, and powder collection device lower extreme is equipped with feed bin plugging device.
Further, feed bin plugging device is including the aggregate bin that is used for shutoff bin outlet and the water tank that is used for settling aggregate bin overflow water, and the aggregate bin up end is higher than the position of the terminal surface under the bin outlet, and the aggregate bin passes through the mount to be fixed in the water tank.
Further, the lower end of the water tank is provided with a drain pipe, the upper end of the water tank is provided with an overflow pipe, and valves are arranged on the drain pipe and the overflow pipe.
Further, be equipped with cooling system in the quench tower, cooling system is including locating at least two-layer annular pipeline in the quench tower and locating the nozzle that is used for cooling plasma on the annular pipeline, and every layer of annular pipeline sets up at least three atomizing nozzle, and annular pipeline and cooling water inlet tube connect.
Further, be equipped with the blast pipe on the quench tower, the blast pipe passes through flange fixed connection with the flue, and the draught fan is connected to the flue, still is equipped with the observation window on the quench tower.
Further, the quench tower is fixed above the water tank through a support frame.
Further, the plasma torch is provided with a plasma channel communicated with the inside of the heating chamber, and an insulating ring is arranged at the connecting part.
Further, a cooling system is arranged on the heating chamber; the heating chamber is of a double-layer hollow structure, a heating chamber water inlet pipe and a heating chamber water outlet pipe which are communicated with the hollow structure are arranged in the heating chamber, and the heating chamber water outlet pipe is positioned above the heating chamber water outlet pipe.
Further, the upper end of the heating chamber is provided with a feeding pipe, the lower end of the heating chamber is of a conical structure, the lower end of the conical structure is in sealing connection with the quenching tower through a connecting flange, and a gasket is arranged at the joint.
The invention has the following characteristics:
1. The invention adopts the cloth bag filter separator and the bin plugging device to collect the plasmas, the cloth bag filter separator is convenient for collecting the dust, and the bin plugging device effectively reduces the scattering of the dust, reduces the pollution to the environment and improves the collection efficiency of the plasmas.
2. The bin plugging device is provided with the collecting bin and the water tank, so that the scattering of dust is further reduced, the collection rate is conveniently improved, and meanwhile, the influence of pressure difference inside and outside the quenching tower on the collection of plasma powder is effectively solved.
3. The multilayer annular pipeline is arranged in the quenching tower, and the nozzle for cooling the plasma is arranged on the pipeline, so that all angles of the plasma powder can be cooled, and meanwhile, the plasma powder is continuously cooled in the falling process, so that the cooling effect is more sufficient, and the cooling effect is effectively improved.
4. The heating chamber is provided with a cooling system for reducing the temperature of the heating chamber and preventing the influence of overhigh temperature on other equipment outside the heating chamber.
5. The invention has simple structure, is suitable for the production and manufacture of other plasma metal powder, and is convenient for the collection and utilization of the plasma powder.
The detailed structure of the present invention is further described below with reference to the accompanying drawings and detailed description.
Drawings
FIG. 1 is a schematic diagram showing the structure of a plasma powder preparing apparatus according to the present invention;
FIG. 2 is a cross-sectional view of the plasma powder preparing apparatus of FIG. 1;
FIG. 3 is a right side view of the plasma powder preparing apparatus of FIG. 2;
1-quench tower, 2-gasket, 3-toper structure, 4-heating chamber, 5-insulating ring, 6-plasma channel, 7-first plasma torch, 8-second plasma torch, 9-inlet pipe, 10-heating chamber outlet pipe, 11-heating chamber inlet pipe, 12-annular pipeline, 13-observation window, 14-atomizing nozzle, 15-water tank, 16-discharge opening, 17-collecting bin, 18-mount, 19-drain pipe, 20-overflow pipe, 21-blast pipe, 22-flange, 23-flue, 24-cooling water inlet pipe, 25-filter cloth bag.
Detailed Description
As shown in fig. 1-3: the utility model provides a plasma powder preparation facilities, includes quench tower 1, heating chamber 4 and plasma torch, and the upper end of heating chamber 4 is located to the plasma torch, and heating chamber 4 upper end still is equipped with inlet pipe 9, and quench tower 1 is connected to the lower extreme of heating chamber 4, and quench tower 1's lower extreme is equipped with powder collection device, and powder collection device's bin outlet 16 sets up the sack and filters the separator, and powder collection device lower extreme is equipped with feed bin plugging device.
The feeding pipe 9 is arranged at the upper end of the heating chamber 4; preferably, the feeding pipe 9 is positioned on the central axis of the heating chamber 4, so that the feeding pipe 9 is convenient to feed, powder and high-temperature plasma are convenient to meet, and the production efficiency is improved; and spraying raw material powder into the heating chamber 4 by adopting a pneumatic conveying mode, so that the powder meets high-temperature plasma, rapidly heating the powder, controlling the air flow pressure to be above 50Pa and controlling the feeding air flow speed to be 2-30 m/s.
The plasma torches comprise a first plasma torch 7 and a second plasma torch 8, wherein the first plasma torch 7 and the second plasma torch 8 form a certain angle with the central line of the heating chamber 4, the plasma torches are obliquely downward and symmetrically distributed on two sides of the feeding pipe 9, and the included angle between the plasma torches and the central line is 10-60 degrees; and the plasma torches are arranged in a plurality of ways, so that the production efficiency and the product quality are improved.
The plasma torch is provided with a plasma channel 6 communicated with the inside of the heating chamber 4, and the connecting part is provided with an insulating ring 5; the plasma channel 6 is a channel of high-temperature plasma air flow and is communicated with the inside of the heating chamber 4, the connection part of the plasma torch and the heating chamber 4 is blocked by adopting the insulating ring 5, the influence of high temperature on the heating chamber 4 or the plasma torch is prevented, the connection strength and the service life between the plasma torch and the heating chamber 4 are improved, and the insulating ring 5 is made of insulating materials.
A cooling system is arranged on the heating chamber 4; preferably, the heating chamber 4 is of a double-layer hollow structure, the heating chamber 4 can also be of a built-in spiral circulating cooling pipeline structure, the heating chamber 4 is provided with a heating chamber water inlet pipe 11 and a heating chamber water outlet pipe 10 which are communicated with the hollow structure, and the heating chamber water outlet pipe 10 is positioned above the heating chamber water outlet pipe 10, so that heat transfer between cooling water and the heating chamber 4 is facilitated, and the cooling effect is improved; and (3) pressurizing by adopting a water pump, inputting cooling water into a water inlet pipe 11 of the heating chamber, wherein the water inlet pressure is 0.1-0.9 MPa, and the water cooling speed is controlled to be 10-200L/min.
The upper end of the heating chamber 4 is provided with the feeding pipe 9, the lower end of the heating chamber 4 is in a conical structure 3, the conical structure 3 is in an inverted V shape, and the conical structure 3 is arranged, so that the raw material powder is convenient to plasmatize, and meanwhile, the impact force on the periphery when plasmatize occurs can be buffered, the plasma powder is convenient to fall, and the influence on the production efficiency and quality caused by accumulation is avoided; the lower end of the conical structure 3 is in sealing connection with the quenching tower 1 through a connecting flange, and a gasket 2 is arranged at the joint and used for improving the sealing strength of the joint.
The observation window 13 is arranged on the quenching tower 1, so that the internal condition of the quenching tower 1 can be observed at any time.
The quenching tower 1 is internally provided with a cooling system, the cooling system comprises at least two layers of annular pipelines 12 arranged in the quenching tower 1 and nozzles arranged on the annular pipelines 12 and used for cooling plasma, each layer of annular pipeline 12 is provided with at least three atomizing nozzles 14, the annular pipelines 12 are connected with a cooling water inlet pipe 24, the annular pipelines 12 are 100-800 mm away from the bottom of the heating chamber 4, and the cooling system is of a circular structure, so that the annular pipelines 12 are conveniently protected, and the influence of high temperature on the annular pipelines 12 is prevented; preferably, at least more than three atomizing nozzles 14 are uniformly circumferentially distributed on the annular pipeline 12, the atomizing nozzles 14 on two adjacent layers of annular pipelines 12 are arranged in a staggered mode, the annular pipelines are arranged in a multi-layer mode, continuous cooling in the falling process of plasma powder is facilitated, the atomizing nozzles 14 are arranged in a staggered mode, each angle of the plasma powder can be guaranteed to be in contact with cooling liquid, the cooling effect is convenient to improve, an atomizing range of the atomizing nozzles 14 is in a fan-shaped structure, the angle of the fan-shaped structure is 120 degrees, and the water spraying direction of the atomizing nozzles 14 points to the center of the quenching tower 1 and is used for cooling the plasma powder. The cooling water inlet pipe 24 is connected with a water pump, the water inlet pressure is 0.1-0.9 MPa, and the water cooling speed is controlled to be 1-30L/min.
The lower end of the quenching tower 1 is provided with a powder collecting device, the powder collecting device is contracted in a conical structure 3, the lower end of the conical structure 3 is provided with a discharge port 16, and powder treated by high-temperature plasma is discharged from the discharge port 16 under the action of excessive atomized water; the discharge opening 16 is provided with a cloth bag filter separator, the discharge opening 16 is plugged by the cloth bag filter separator, powder is blocked by a filter cloth bag 25 in the cloth bag filter separator and is reserved in the cloth bag, water flows out of the cloth bag, the collection efficiency of the powder is effectively improved, and meanwhile, the scattering of the dust or the occurrence of flying dust is effectively reduced, and the influence on the environment is effectively reduced.
The lower end of the discharge hole 16 is provided with a bin plugging device, the bin plugging device comprises a collecting bin 17 for plugging the discharge hole 16 and a water tank 15 for placing overflowed water of the collecting bin 17, the upper end surface of the collecting bin 17 is higher than the lower end surface of the discharge hole 16, so that the discharge hole 16 can be submerged after the collecting bin 17 is filled with water, the discharge hole 16 is plugged, high-temperature gas is prevented from escaping from the bottom, the pressure balance inside and outside the quenching tower 1 is effectively ensured, and meanwhile, the powder collection efficiency is ensured; the aggregate bin 17 is fixed in the water tank 15 through the mount 18, and the mount 18 is settled in the water tank 15 bottom, and aggregate bin 17 also can take out from the mount 18, and the water tank 15 is used for settling aggregate bin 17 overflowed water.
The quench tower 1 is fixed in water tank 15 top through the support frame, and the support frame is also fixed in the bottom of water tank 15, and water tank 15 water level minimum department sets up drain pipe 19 and valve for the overflow of unnecessary water, and water tank 15 design maximum water level department sets up overflow pipe 20 and valve for the drainage of water is completely spent.
An exhaust pipe 21 is provided on the side surface of the quenching tower 1, and the exhaust pipe 21 and a flue 23 are connected by a flange 22. The flue 23 is connected with a draught fan, the negative pressure of the flue 23 is required to be-50 to-2000 Pa, and the flue gas flow is 100-5000L/min.
The operation mode of the invention is as follows: and starting a water pump for supplying the cooling water inlet pipe 24, controlling the water pressure at the position of the cooling water inlet pipe 24 to be 0.1-0.9 MPa, and controlling the water cooling speed to be 1-30L/min. Starting a water pump for supplying water into the water inlet pipe 11 of the heating chamber, wherein the water inlet pressure is 0.1-0.9 MPa, and the water cooling speed is controlled to be 10-200L/min. The drain pipe 19 of the water tank 15 is closed, and the overflow pipe 20 of the water tank 15 is opened. The filter cloth bag 25 is blocked at the discharge port 16, and after the collecting bin 17 is filled with water, a draught fan connected with the flue 23 is started, the negative pressure is required to be-50 to-2000 Pa, and the flue gas flow is 100-5000L/min, so that the inside of the quenching tower 1 and the inside of the heating chamber 4 are kept in a negative pressure state. Only the air flow of the feed pipe 9 is started, but the raw material powder is not fed into the pipeline, the air flow pressure is above 50Pa, and the feeding air flow speed is controlled to be 2-30 m/s. And starting a plasma torch, starting raw material powder in a feeding pipe 9 after the temperature in the heating chamber 4 is stable, conveying the raw material powder into the heating chamber 4 to meet high-temperature plasma coming out of a plasma torch channel, and rapidly heating, melting and reacting the raw material powder. The powder moves downwards into the quenching tower 1 under the action of air flow and gravity, meets atomized water in the quenching tower 1, is quenched at the same time, high-temperature flue gas is cooled, part of water is evaporated into water vapor, redundant water is adsorbed on the powder and is settled from the discharge port 16 along with the action of gravity, the powder is collected in the filter cloth bag 25, the water enters the collecting bin 17 from the filter cloth bag 25 and overflows to the water tank 15, and the flue gas and the water vapor enter the flue 23 along with the exhaust pipe 21 and are discharged.
The preferred embodiments of the present invention have been described in detail above, but it is apparent that the present invention is not limited to the above-described embodiments. Within the scope of the technical idea of the invention, various equivalent modifications can be made to the technical solution of the invention, which all belong to the protection scope of the invention. In addition, the technical features described in the above-described specific embodiments may be combined separately and independently as long as they are within the technical concept of the present invention.
Claims (5)
1. The utility model provides a plasma powder preparation facilities, includes quench tower, heating chamber and plasma torch, and the upper end of heating chamber is located to the plasma torch, and the heating chamber upper end still is equipped with the inlet pipe, and quench tower, its characterized in that are connected to the lower extreme of heating chamber: the lower end of the quenching tower is provided with a powder collecting device, a discharge hole of the powder collecting device is provided with a cloth bag filter separator, and the lower end of the powder collecting device is provided with a stock bin plugging device;
The bin plugging device comprises a collecting bin for plugging the discharge port and a water tank for placing overflowed water of the collecting bin, wherein the upper end surface of the collecting bin is higher than the lower end surface of the discharge port, the collecting bin is fixed in the water tank through a fixing frame, and the discharge port can be submerged after the collecting bin is filled with water, so that the discharge port is plugged; the lower end of the water tank is provided with a drain pipe, the upper end of the water tank is provided with an overflow pipe, and valves are arranged on the drain pipe and the overflow pipe;
A cooling system is arranged in the quenching tower and comprises at least two layers of annular pipelines arranged in the quenching tower and nozzles arranged on the annular pipelines and used for cooling plasma, each layer of annular pipeline is provided with at least three atomizing nozzles, and the annular pipeline is connected with a cooling water inlet pipe;
The quenching tower is fixed above the water tank through a support frame; the support frame is fixed at the bottom of the water tank.
2. The plasma powder preparing apparatus as recited in claim 1, wherein: the quenching tower is provided with an exhaust pipe, the exhaust pipe is fixedly connected with a flue through a flange, the flue is connected with an induced draft fan, and the quenching tower is also provided with an observation window.
3. The plasma powder preparing apparatus as recited in claim 1, wherein: the plasma torch is provided with a plasma channel communicated with the inside of the heating chamber, and an insulating ring is arranged at the connecting part.
4. The plasma powder preparing apparatus as recited in claim 1, wherein: a cooling system is arranged on the heating chamber; the heating chamber is of a double-layer hollow structure, a heating chamber water inlet pipe and a heating chamber water outlet pipe which are communicated with the hollow structure are arranged in the heating chamber, and the heating chamber water outlet pipe is positioned above the heating chamber water outlet pipe.
5. The plasma powder preparing apparatus as recited in claim 4, wherein: the lower end of the heating chamber is of a conical structure, the lower end of the conical structure is in sealing connection with the quenching tower through a connecting flange, and a gasket is arranged at the joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330154.XA CN109847675B (en) | 2019-04-23 | Plasma powder preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330154.XA CN109847675B (en) | 2019-04-23 | Plasma powder preparation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109847675A CN109847675A (en) | 2019-06-07 |
| CN109847675B true CN109847675B (en) | 2024-05-14 |
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| 急冷水雾化工艺对金属粉末性能的影响;麻洪秋, 贾成厂, 金成海, 鲍雨;粉末冶金技术;20021230(06);全文 * |
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