CN215491001U - Roasting reaction generator for producing nano alumina - Google Patents
Roasting reaction generator for producing nano alumina Download PDFInfo
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- CN215491001U CN215491001U CN202121928798.8U CN202121928798U CN215491001U CN 215491001 U CN215491001 U CN 215491001U CN 202121928798 U CN202121928798 U CN 202121928798U CN 215491001 U CN215491001 U CN 215491001U
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- spray gun
- oxidizing atmosphere
- temperature furnace
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- natural gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
A roasting reaction generator for producing nano-alumina, aiming at saving energy, protecting environment and having high production efficiency; the utility model comprises a high-temperature furnace with strong oxidizing atmosphere, a high-pressure suction fan, a premixed natural gas spray gun, an oxygen generator and an infrared thermometer; the premixing natural gas spray gun is matched with a spray gun electromagnetic valve; the power supply of the spray gun electromagnetic valve is connected with the corresponding safety and the common zero line; the internal cavity of the strong oxidizing atmosphere high-temperature furnace is of a spherical structure, the inner layer of the cavity is made of a zirconia-corundum refractory material, the outer layer of the cavity is wrapped with alumina fiber cotton, and the outermost layer of the cavity is a metal shell; an electric actuator for controlling the flow of the mixed gas is arranged at the front end of the combustion chamber of the spray gun; one pipeline of the oxygen generator is connected with the premixed natural gas spray gun, and the other pipeline of the oxygen generator is communicated with a discharge hole of the strong oxidizing atmosphere high-temperature furnace; the infrared thermometer is a portable infrared thermometer and is arranged at a fire observation hole on a metal shell of the high-temperature furnace in the strong oxidizing atmosphere; the high-pressure suction fan is connected to the feed inlet of the high-temperature furnace in the strong oxidizing atmosphere.
Description
Technical Field
The utility model relates to a roasting reaction generator for producing nano-alumina.
Background
The roasting process for producing gamma crystal form and alpha crystal form aluminum oxide at home and abroad at present comprises the following steps: tunnel kiln and rotary kiln, the product burns the time long, the energy consumption is high, the environmental pollution is serious, the alumina crystal grain thickness is uneven, the grain size can not be controlled, can not produce the nanometer alumina. When the alumina is roasted in the tunnel kiln, only the alpha crystal form alumina can be produced. Industrial beta alumina powder is filled into sagger, stacked on kiln car, queued into kiln, and calcined at high temperature over 1400 deg.c to form the sagger, and sagger core material is burnt to be heat conductive by alumina, so that the grain size inside and outside and conversion rate are different. Generally, the average conversion rate of alpha crystal form alumina is more than 95%, the higher the conversion rate of alpha crystal form alumina is, the more sufficient the calcination is, the higher the calcination temperature is, the conversion rate is easy to achieve, but the calcined alumina powder needs to be subjected to fine grinding treatment to reach the micro powder level and used as a ceramic or refractory material, and the reaction activity of alumina is poor. The quality of the alumina powder surface and the quality of the alumina powder inner core of each sagger are different, the quality of the sagger is different from inside to outside and from top to bottom, the thermal efficiency is low, the loss is large, the pollution is serious, the sagger consumption is large, and the alumina crystal particles cannot be controlled. When the alumina is roasted in the rotary kiln, cleaned wet alumina hydroxide is fed into one end of the kiln, heavy oil or fuel gas is sprayed from the other end of the kiln, reaction processes such as drying, crystal water removal, crystal form conversion and the like are completed in the kiln, the roasting process of the alumina is not uniformly heated, the raw materials close to the cylinder wall often cannot be discharged for a long time or simultaneously are discharged in large blocks, and the quality depends on the homogenization treatment in the later stage, so that high-grade nano alumina cannot be produced. The heat energy of the fuel gas is discharged from the other end of the rotary kiln after passing through the rotary kiln, and simultaneously, partial alumina is taken away, so that the heat efficiency is low, the loss is large, the pollution is serious, and the alumina crystal particles cannot be controlled.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide the roasting reaction generator for producing the nano alumina, which is energy-saving, environment-friendly and high in production efficiency.
The utility model relates to a roasting reaction generator for producing nano-alumina, which comprises a strong oxidizing atmosphere high-temperature furnace, a high-pressure suction fan, a premixed natural gas spray gun, an oxygen generator and an infrared thermometer; the premixing natural gas spray gun is provided with a spray gun electromagnetic valve which plays a role of safety protection; the power supply of the spray gun electromagnetic valve is connected with the corresponding safety and the common zero line; the internal cavity of the strong oxidizing atmosphere high-temperature furnace is of a spherical structure, the inner layer of the cavity is made of a zirconia-corundum refractory material, the outer layer of the cavity is wrapped with alumina fiber cotton, and the outermost layer of the cavity is a metal shell; an electric actuator for controlling the flow of the mixed gas is arranged at the front end of the combustion chamber of the spray gun; one pipeline of the oxygen generator is connected with the premixed natural gas spray gun, and the other pipeline of the oxygen generator is communicated with a discharge hole of the strong oxidizing atmosphere high-temperature furnace; the infrared thermometer is a portable infrared thermometer and is arranged at a fire observation hole on a metal shell of the high-temperature furnace in the strong oxidizing atmosphere; the high-pressure suction fan is connected to the feed inlet of the high-temperature furnace in the strong oxidizing atmosphere.
The inner diameter of the high-temperature furnace chamber with the strong oxidizing atmosphere is 1 m. The high-pressure suction fan is provided with a fan frequency converter capable of controlling flow. And a flame monitor for observing the flame of the spray gun and an igniter for ignition are arranged on the spray gun. The power of the premixed natural gas spray gun is 50-200 KW.
The utility model is suitable for the production of nano alumina, can produce high-quality nano alumina, is energy-saving and environment-friendly, has high production efficiency, low production cost, controllable particle size of alumina products, very wide application range and no pollutant emission, fully utilizes the waste heat of fuel gas, and produces products with vigorous market demand.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. the device comprises a natural gas intelligent turbine flowmeter, 2 a spray gun electromagnetic valve, 3 an electric actuator, 4 a flame monitor, 5 a premixed natural gas spray gun, 6 an oxygen generator, 7 an oxygen gas intelligent turbine flowmeter, 8 an igniter, 9 a refractory material, 10 alumina fiber cotton, 11 a strong oxidizing atmosphere high-temperature furnace metal shell, 12 a B-type thermocouple, 13 a strong oxidizing atmosphere high-temperature furnace cavity, 14 a fire observation hole, 15 a pressure transmitter, 16 a discharge hole, 17 a high-pressure suction and delivery fan connecting port and 18 an oxygen content detector.
Detailed Description
A spray gun electromagnetic valve 2 with a safety protection function is matched and arranged on the premixed natural gas spray gun 5; the power supply of the spray gun electromagnetic valve 2 is connected with the corresponding safety and the common zero line; the oxygen gas intelligent turbine flowmeter 7 is connected with the natural gas intelligent turbine flowmeter 1; the cavity 13 of the high-temperature furnace with strong oxidizing atmosphere is of a spherical structure, the inner layer of the cavity is made of a zirconia-corundum refractory material 9, the outer layer of the cavity is wrapped by alumina fiber cotton 10, and the outermost layer of the cavity is a metal shell 11; an electric actuator 3 for controlling the flow of the mixed gas is arranged between the spray gun electromagnetic valve 2 and the premixed natural gas spray gun 5; the pressure transmitter 15 is arranged on a discharge hole of the strong oxidizing atmosphere high-temperature furnace chamber 13, and the oxygen content detector 18 and the high-pressure suction blower connector 17 are arranged on a feed hole of the strong oxidizing atmosphere high-temperature furnace chamber 13; the oxygen generator 6 is arranged at the front end of the intelligent oxygen gas turbine flowmeter 7; the other outlet pipeline of the oxygen generator 6 is communicated with a discharge hole of a chamber 13 of the high-temperature furnace with strong oxidizing atmosphere; the infrared thermometer adopts a portable infrared thermometer and is arranged at a fire observation hole 14 on a metal shell of the high-temperature furnace in the strong oxidizing atmosphere for measuring temperature.
A feeding hole of the strong oxidizing atmosphere high-temperature furnace chamber 13 is arranged along the tangential direction of the circular chamber 13; the premixed natural gas spray gun 5 and the feeding hole form an angle of 90 degrees along the tangential direction of the circular chamber 13; the discharge port 16 is parallel to the feed port and forms an angle relation of 90 degrees with the premixed natural gas spray gun 5; the type B thermocouple 12 is installed directly opposite the premixed natural gas injection lance 5 and is opened in a diameter direction. The pressure transmitter 15 is installed on the discharge hole cylinder wall.
The oxygen flow is sent to oxygen gas intelligence turbine flowmeter 7 according to setting for the proportional value, and the frequency of control converter adjusts the supply for oxygenerator 6, and electric actuator 3 carries out the electron ignition for installing the high-pressure package in the front of premixing natural gas spray gun 5 and igniter 8 through the instruction, catches fire the back, and flame monitor 4 judges to there being the firing signal, and control spray gun solenoid valve 2 is normally opened or is closed rapidly. The spray gun electromagnetic valve 2 is cut off when the premixed natural gas spray gun 5 is flamed out, thereby playing the role of safety and explosion prevention.
The natural gas intelligent turbine flowmeter 1 and the oxygen gas intelligent turbine flowmeter 7 on the gas pipeline measure the instantaneous flow of gas, and the combustion-supporting oxygen flow is automatically regulated at a high temperature stage according to the set air-gas ratio and the ratio coefficient multiplied by the measured gas flow value to form closed-loop control. All links are mutually matched so as to realize the automatic control of the ignition, temperature rise, transverse temperature, flameout and action of the automatic roasting generator.
The premixed natural gas spray gun 5 requires 50-200KW of power and is arranged on a metal shell 11 of the high-temperature furnace in the strong oxidizing atmosphere; the oxygen generator 6 adopts XSO-60, and the oxygen output is 60m3The purity of oxygen is larger than or equal to 90%, one pipeline of the oxygen generator 6 is connected with the premixed natural gas spray gun 5, and the other pipeline of the oxygen generator 6 is communicated with a discharge hole of the strong oxidizing atmosphere high-temperature furnace 13; the internal diameter of the chamber of the strong oxidizing atmosphere high-temperature furnace 13 is 1m, and the volume is about 0.523m3(ii) a Suction and discharge maximum flow rate of 500m of high-pressure suction fan3/h，380V,5.5KW。
Claims (5)
1. A roasting reaction generator for producing nano alumina is characterized by comprising a strong oxidizing atmosphere high-temperature furnace, a high-pressure suction fan, a premixed natural gas spray gun, an oxygen generator and an infrared thermometer; the premixing natural gas spray gun is provided with a spray gun electromagnetic valve which plays a role of safety protection; the power supply of the spray gun electromagnetic valve is connected with the corresponding safety and the common zero line; the internal cavity of the strong oxidizing atmosphere high-temperature furnace is of a spherical structure, the inner layer of the cavity is made of a zirconia-corundum refractory material, the outer layer of the cavity is wrapped with alumina fiber cotton, and the outermost layer of the cavity is a metal shell; an electric actuator for controlling the flow of the mixed gas is arranged at the front end of the combustion chamber of the spray gun; one pipeline of the oxygen generator is connected with the premixed natural gas spray gun, and the other pipeline of the oxygen generator is communicated with a discharge hole of the strong oxidizing atmosphere high-temperature furnace; the infrared thermometer is a portable infrared thermometer and is arranged at a fire observation hole on a metal shell of the high-temperature furnace in the strong oxidizing atmosphere; the high-pressure suction fan is connected to the feed inlet of the high-temperature furnace in the strong oxidizing atmosphere.
2. The roasting reaction generator for producing nano alumina as claimed in claim 1, wherein the inside diameter of the high temperature furnace chamber of the strong oxidizing atmosphere is 1 m.
3. The roasting reaction generator for producing nano alumina as claimed in claim 1 or 2, wherein the high pressure suction blower is provided with a blower frequency converter capable of controlling flow rate.
4. The calcination reaction generator for producing nano-alumina according to claim 1 or 2, wherein the lance is provided with a flame monitor for observing the flame of the lance and an igniter for igniting.
5. The roasting reaction generator for producing nano alumina according to claim 1 or 2, wherein the premixed natural gas spray gun has a power of 50 to 200 KW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121928798.8U CN215491001U (en) | 2021-08-17 | 2021-08-17 | Roasting reaction generator for producing nano alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121928798.8U CN215491001U (en) | 2021-08-17 | 2021-08-17 | Roasting reaction generator for producing nano alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215491001U true CN215491001U (en) | 2022-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121928798.8U Active CN215491001U (en) | 2021-08-17 | 2021-08-17 | Roasting reaction generator for producing nano alumina |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215491001U (en) |
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2021
- 2021-08-17 CN CN202121928798.8U patent/CN215491001U/en active Active
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