CN113582227A - Preparation device and method of composite titanium dioxide - Google Patents
Preparation device and method of composite titanium dioxide Download PDFInfo
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- CN113582227A CN113582227A CN202110886937.3A CN202110886937A CN113582227A CN 113582227 A CN113582227 A CN 113582227A CN 202110886937 A CN202110886937 A CN 202110886937A CN 113582227 A CN113582227 A CN 113582227A
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- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/022—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electronic means
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Abstract
The invention discloses a preparation device of composite titanium dioxide, which comprises an outer shell and a tank body; the tank body is arranged in the outer shell, the bottom of the outer shell is provided with supporting legs, a multilayer structure is arranged between the outer shell and the tank body, one side close to the outer shell is provided with a cooling pipe, the cooling pipe is uniformly distributed on the inner wall of the outer shell, one side of the cooling pipe close to the tank body is provided with a volatilization branch passage, a plurality of layers of combustion passages are arranged between the volatilization branch passage and the tank body, each layer of combustion passage is paved with a gas pipe, and a calcining chamber is arranged in the tank body; the rotation of the wind turbine is pushed by the smoke airflow, the auxiliary motor is turned off at the moment, and the cam is driven to rotate by the rotation of the wind turbine, so that the piston plate of the air supply mechanism is driven to reciprocate, sufficient air is fed into the combustion channel, the coal gas is sufficiently combusted, the coal gas combustion rate is improved, and the calcining efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a preparation device and method of composite titanium dioxide.
Background
Titanium dioxide (TiO2) is an important inorganic chemical product and has important application in the industries of paint, printing ink, paper making, plastic rubber, chemical fiber, ceramic and the like. Titanium dioxide (English name: titanium dioxide), a white pigment whose main component is titanium dioxide (TiO 2). The chemical name is titanium dioxide (titanium dioxide), the molecular formula is TiO2, a polycrystalline compound, the mass points of which are regularly arranged and have a lattice structure. The relative density of titanium dioxide is minimal. The production process of titanium dioxide comprises two process routes of a sulfuric acid method and a chlorination method.
At present, in the production process of a sulfuric acid method, ferrotitanium powder and concentrated sulfuric acid react to generate ferric sulfite, ferric sulfite is hydrolyzed into ferrate, the ferrate is calcined and crushed to generate titanium dioxide, however, in the existing calcination process, a heating method of gas combustion is generally adopted, a self-absorption mode is generally adopted to supply gas and oxygen while the gas is combusted, the oxygen supply efficiency is low, the gas cannot be fully combusted, the calcination temperature is low, the temperature is unstable, the produced solid titanium has more impurities, the purity is poor, the calcination quality cannot be guaranteed, an air blower is adopted to supply gas, a large amount of electric energy needs to be consumed for continuous gas supply in the continuous forging process, and the energy saving effect is poor; in the calcining process, because the temperature control error of the existing calcining furnace is large, the purity of the generated solid titanium is low, the calcining quality is seriously influenced, and the quality of the generated and produced titanium is influenced.
Chinese patent application No. 201420507466.6 discloses a temperature measuring device for a titanium dioxide calcining kiln, wherein the titanium dioxide calcining kiln comprises a kiln head, a kiln middle part and a kiln tail; a kiln head cover which is connected with the kiln head and fixed outside the calcining kiln is arranged outside the kiln head; the temperature measuring device for the titanium dioxide calcining kiln comprises a kiln head temperature measuring element fixedly arranged on a kiln head sleeve; according to the temperature measuring device for the titanium dioxide calcining kiln, the temperature measuring element at the kiln head is fixedly placed and does not rotate along with the kiln body, so that the temperature measuring element at the kiln head can be always immersed in the titanium dioxide pile for the titanium dioxide staying at the bottom of the calcining kiln under the influence of self weight in the rotation process of the calcining kiln. The technical scheme is not easy to operate, and the measurement accuracy of the temperature needs to be improved.
Chinese patent application No. 201922468321.5 discloses an energy-saving titanium white powder calcining equipment, including calcining the case, calcining the top of case and being equipped with the feed inlet, calcining the top surface of case and being located feed inlet top fixedly connected with compressor, calcining two swash plates of top end fixedly connected with of case, two swash plate cross distribution, the utility model discloses an external control equipment starts compressor, air heater, a motor, No. two motors and No. three motors, utilizes the compressor to compress into the pie with the titanium white powder raw materials, falls into calcining the case along the feed inlet to enlarge the area of contact of titanium white powder and steam and air conditioning, open the slide at last, can by the discharge opening discharge. Among the above-mentioned technical scheme, the calcination scheme of adoption adopts the mode oxygen suppliment of admitting air from inhaling, and the oxygen suppliment is efficient, leads to the coal gas not fully burning, leads to calcining the temperature low simultaneously, and the temperature is unstable leads to the solid-state titanium of production to have impurity more, and the purity is relatively poor, calcines the quality and can not obtain the assurance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation device and a preparation method of composite titanium dioxide, wherein a flue gas flow is used for pushing a wind turbine to rotate, an auxiliary motor is turned off at the moment, and a cam is driven to rotate by means of the rotation of the wind turbine, so that a piston plate of an air supply mechanism is driven to reciprocate, sufficient air is fed into a combustion channel for sufficient combustion of coal gas, the combustion rate of the coal gas is improved, and the calcination efficiency is improved; redundant gas generated in the tank body enters the volatilization branch channel through a vent hole arranged at the top, the volatilization branch channel is communicated with the combustion channel, and the gas is combusted, so that the pollution emission is effectively reduced; set up temperature monitoring system, constantly monitor the temperature in the burning way, guarantee the calcination temperature, improve the accuracy nature of calcination temperature, improve and calcine the quality, promote the production efficiency of titanium white powder.
The invention provides the following technical scheme:
a preparation device of composite titanium dioxide comprises an outer shell and a tank body; the tank body is arranged in the outer shell, the bottom of the outer shell is provided with supporting legs, a multilayer structure is arranged between the outer shell and the tank body, one side close to the outer shell is provided with a cooling pipe, the cooling pipe is uniformly distributed on the inner wall of the outer shell, one side of the cooling pipe close to the tank body is provided with a volatilization branch passage, a plurality of layers of combustion passages are arranged between the volatilization branch passage and the tank body, each layer of combustion passage is paved with a gas pipe, and a calcining chamber is arranged in the tank body;
the top of the tank body is provided with a plurality of air vents, the air vents are communicated with the tops of the volatilization branch channels, and the volatilization branch channels and each combustion channel are provided with communicated ports; the top of the tank body is provided with a feeding port, and the bottom of the tank body is provided with a discharging port; the top of the combustion channel is provided with a discharge channel, an air supply mechanism is arranged below the discharge channel, and the air supply mechanism is provided with an air supply pipe which supplies air into the combustion channel in an accelerated manner.
Preferably, the combustion channels are arranged on two sides of the tank body, the combustion channels on two sides are communicated with the top of the outer shell, the gas pipes arranged in the discharge channels on two sides are communicated with gas transmission ports, and the gas pipes supply combustion gas through the gas transmission ports.
Preferably, a filter is arranged in the discharge flue, and a first box body is arranged on one side far away from the filter, is of a cylindrical structure and is arranged along the axial direction of the discharge flue; a wind turbine is arranged in the first box body, an output shaft of the wind turbine is connected with a cam, the other side of the cam deviates from the circle center and is rotatably connected with a connecting rod, and the other end of the connecting rod penetrates through the first box body; and an auxiliary motor is arranged on one side of the wind turbine close to the cam, and the auxiliary motor and the wind turbine can drive the cam to run together.
Preferably, the air supply mechanism includes the second box body, the second box body is sealed cuboid structure, be provided with the piston board in the second box body, one side of piston board is connected with the telescopic link, the other end of telescopic link runs through the second box body wall and is connected with the connecting rod rotation, and constitutes clearance sliding connection with the second box body wall.
Preferably, the side walls of the two ends of the second box body are both provided with air inlets, one side close to the telescopic rod is provided with a first air inlet, the other side is provided with a second air inlet, and the first air inlet is arranged below the telescopic rod; one side of the second box body, which is close to the outer shell, is provided with a first air supply outlet and a second air supply outlet, the first air supply outlet is connected with a first air supply pipe, the second air supply outlet is connected with a second air supply pipe, and the first air supply pipe and the second air supply pipe are both connected with a combustion channel in the outer shell.
Preferably, the periphery of the piston plate is provided with a rubber ring, and the rubber ring is connected with the inner side wall of the second box body in a sealing and sliding manner.
Preferably, the first air inlet and the second air inlet are provided with first air doors, the first air doors and the second air doors are both arranged on the inner side of the second box body, and the first air doors and the second air doors are rotatably connected with the inner side wall of the second box body through arranged hinges; the outer sides of the second air supply outlets of the first air supply outlets are provided with third box bodies, the third box bodies are of sealing structures, the first air supply pipes and the third box bodies are nested, and the second air supply pipes and the third box bodies are nested; and a second air door is arranged in the third box body, the second air door is arranged on the outer side of the second box body, and the second air door is rotatably connected with the outer side wall of the second box body through a set hinge.
Preferably, in the calcining process, the working process of the air supply mechanism is that when the calcining is started initially, the auxiliary motor is started to work, the auxiliary motor drives the cam and the connecting rod to rotate, so that the telescopic rod and the piston plate are driven to do reciprocating motion in the second box body, and compressed air enters the combustion channel in the reciprocating motion process to supply coal gas to complete sufficient combustion. After the gas is combusted, the auxiliary motor is turned off, and because the flow velocity of the flue gas is high in the process of being discharged from the discharge flue, the wind turbine is arranged in the first box body of the discharge flue, the flue gas flowing fast drives the wind turbine to rotate, so that the cam and the connecting rod are driven to rotate, and the air supply mechanism is driven to complete air supply. In the combustion process, if the calcining temperature is kept stable, the wind turbine is always adopted to drive the air supply mechanism to supply air to the combustion channel, if the calcining temperature needs to be adjusted, the auxiliary motor is started, and when the temperature needs to be increased, the auxiliary motor is controlled to rotate in the positive direction, the auxiliary motor and the wind turbine synchronously do work, the reciprocating motion rate of a piston plate in the air supply mechanism is accelerated, and the air supply rate of the first air supply pipe and the second air supply pipe is increased; if the calcining temperature needs to be reduced, the auxiliary motor is controlled to rotate reversely, and the wind turbine drive is reducedThe rotating speed of the movable cam reduces the reciprocating motion rate of a piston plate in the air supply mechanism, reduces the air supply rates of the first air supply pipe and the second air supply pipe, and has insufficient combustion and reduced calcination temperature. The auxiliary motor is connected with a driving shaft of the wind turbine by arranging a speed reducer. In order to further ensure that the coal gas is fully combusted, the combustion efficiency is improved, the calcination temperature is stable, and the yield of generated solid titanium is improved, the air inflow in the combustion channel is Q, when the wind turbine and the auxiliary motor synchronously do work, the rotating speed of the wind turbine is n1, the rotating speed of the auxiliary motor is n2, when the wind turbine pushes the piston plate to work, the air flow rates of the first air supply pipe and the second air supply pipe are v1, when the auxiliary motor pushes the piston plate to work, the air flow rates of the first air supply pipe and the second air supply pipe are v2, and then the air inflow Q in the combustion channel meets the following formula in unit time t: q δ ((n1+ n2)/(v 1)2+v22))1/2t; when the temperature needs to be reduced, the auxiliary motor rotates reversely to do reverse work with the wind turbine, and Q is delta ((n1-n2)/(v 1)2-v22))1/2t，n1>n 2; in the above formula, delta is the air inflow coefficient, and the value range is 0.322-6.88; n1, n1 units rad, v1, v2 units m3Min; q is given in g, t units of seconds.
In addition, in the air supply process of the air supply mechanism, when the telescopic rod drives the piston plate to press down, the first air door of the first air inlet is in an open state under the action of negative pressure, and the first air door of the second air inlet is in a closed state under the action of pressure in the second box body; meanwhile, a second air door at the first air supply opening is in a closed state under the action of negative pressure, a second air door arranged at the second air supply opening is in an open state under the action of pressure in the second box body, and air in the second box body is accelerated to enter the combustion channel from the second air supply pipe under the action of downward pressure of the piston plate, so that the sufficient oxygen content in the combustion channel is ensured, the coal gas is completely combusted, and the combustion efficiency is improved; when the piston plate moves upwards, the first air door of the first air inlet is closed under the action of pressure, the first air door of the second air inlet is opened under the action of negative pressure, the second air door of the first air supply outlet is opened under the action of pressure, the second air door of the second air supply outlet is closed under the action of negative pressure, and air in the second box body is closed under the action of the upward pressure of the piston plate and enters the combustion channel from the first air supply pipe in an accelerating manner. The fresh air can flow into the combustion channel continuously and rapidly by the mode, so that the media can be completely and fully combusted, the combustion efficiency is improved, the stability of the calcination temperature is ensured, the generation of byproducts in the calcination process is reduced, and the calcination quality and the yield are improved. In order to improve the accuracy of temperature control, the air quantity entering a combustion passage is controlled to ensure that the coal gas is fully combusted, and the temperature T of the fully combusted coal gas meets the air inlet quantity Q in the combustion passage in unit time T1, wherein T is phi (2Q/T1), phi is a temperature relation coefficient and has a value range of 1.5-4.88; t unit is; in the actual calcination, the temperature in the tank body is at least 1300 ℃, the above formula shows that the unit time is 100 seconds, the temperature relation coefficient is constant 2, if the air input Q is 2000g, the calcination temperature T is 800, if the air input Q is 3000g, the calcination temperature T is 1200, if the air input Q is 3500g, the calcination temperature T is 1400, the above formula shows that when phi is constant 2, the experimental data shows that the calcination temperature can be reached by introducing 3500g of air into the combustion channel within 100 seconds, and the above formula can control the temperature in the combustion channel according to the rotating speed of the wind turbine and the rotating speed of the auxiliary motor. And contributes to improving the control accuracy of the combustion temperature.
Preferably, the preparation method of the preparation device for the composite titanium dioxide comprises the following steps:
s1, titanium iron powder reacts with concentrated sulfuric acid to generate titanium sulfite, metatitanic acid is generated after hydrolysis, and the metatitanic acid is added into the tank body through a feed inlet and calcined;
s2, introducing coal gas into the coal gas pipe, simultaneously starting the auxiliary motor to drive the air supply mechanism to supply air into the combustion channel, and igniting through an igniter arranged at the bottom of the combustion channel;
s3, after ignition, combustion is carried out in the combustion channel, combustion smoke is discharged outwards along the discharge channel, smoke airflow filtered by the filter pushes the wind turbine to rotate, at the moment, the auxiliary motor is turned off, the cam is driven to rotate by the rotation of the wind turbine, so that the piston plate of the air supply mechanism is driven to reciprocate, sufficient air is supplied to the combustion channel, coal gas is fully combusted, the coal gas combustion rate is improved, and the calcination efficiency is improved;
s4, in the combustion process, redundant gas generated in the tank body enters the volatilization branch channel through a vent hole arranged at the top, the volatilization branch channel is communicated with the combustion channel, and the gas is combusted, so that the pollution emission is effectively reduced;
and S4, discharging from a discharge opening after the calcination is finished, and crushing by a crusher and grinding by a grinder to obtain the titanium dioxide.
Preferably, in step S3, the plurality of temperature sensors are disposed at the top of the combustion channel, the temperature in the combustion channel is collected, the temperature monitoring system is disposed, the temperature in the combustion channel is constantly monitored, the calcination temperature is ensured, the accuracy of the calcination temperature is improved, the calcination quality is improved, and the production efficiency of titanium dioxide is improved.
Preferably, the temperature detection system comprises a single chip microcomputer, a control module, a display module, a temperature measurement module, an air supply mechanism and a communication system; the temperature measuring module comprises a plurality of temperature sensors and a data acquisition card; the temperature sensor collects the temperature in the combustion channel, the temperature is transmitted into the single chip microcomputer through the data acquisition card, the single chip microcomputer eliminates temperature data with large errors through data processing and analysis, accurate temperature data are obtained, then the rotating speed of the auxiliary motor is controlled through the control module, and further the air supply quantity of the air supply mechanism is controlled, so that the combustion degree of coal gas is controlled, the calcination temperature is controlled in real time, and the calcination temperature is displayed through a display screen of the display module in real time.
Preferably, the temperature measuring module comprises a temperature sensor and a data acquisition card, the data acquisition card acquires temperature data and then transmits the temperature data to the control module through serial communication, and the communication system adopts I2And C, a communication protocol, wherein after the control module receives the temperature data information, the control module analyzes and processes the temperature data, eliminates data with larger errors, extracts required data fragments, and increases the accuracy of temperature monitoring after analysis and processing.
In addition, when the data acquisition card of the temperature measurement module acquires the temperature through the temperature sensor, the method comprises the steps that A, the sampling frequency is 1Hz, and 200 effective temperature values are continuously read by the MCU through the data acquisition card every 1 millisecond; b, eliminating the maximum value and the minimum value in the collected effective temperature values, and taking the average value of the remaining data to store the average value in a corresponding array S; c, using a fourth-order wavelet decomposition array S to obtain corresponding detail wavelet coefficient sequences S1, S2, S3, S4 and S5, and performing filtering processing with a certain threshold value on each detail wavelet coefficient sequence to obtain S11, S22, S33, S44 and S55; and D, performing wavelet inverse transformation on the new data set obtained in the step C, and filtering to obtain a pure temperature signal. The collected temperature signals are processed by the method, the temperature accuracy reaches within 0.1 ℃, the interference resistance of external noise is reduced, the accuracy of temperature monitoring in a combustion channel is improved, the calcination efficiency is improved, and the generation quality of solid titanium is improved.
In addition, after a pure temperature signal is obtained, time domain, frequency domain and time-frequency domain data characteristics of the temperature signal are extracted through matlab, the data characteristic signals are layered according to different calcining temperature gradients, a clustering center is found out for each layer of temperature data by using a clustering algorithm, a few data sets are obtained, a classifier is trained on the data sets, and good classification and training results are extracted to form a new database; re-layering the new data set, firstly calculating the center of each cluster of data through clustering, then calculating Euclidean distance with the clustering center of each layer of the new database, then adding the distances between the new data set and the clustering centers, and classifying the new data set with the minimum distance into one class, so as to realize layering on the new temperature data set; and judging whether the new temperature data after layering belongs to a smaller set or not until the lowest layer, wherein the mode of judging whether the new temperature data belongs to the smaller set is that whether the new data can be classified and trained to form a new database or not. And finally, outputting the trained classified output temperature, and displaying the temperature through a display of the single chip microcomputer. The accuracy of temperature monitoring is further improved through the method.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention relates to a preparation device and a preparation method of composite titanium dioxide, wherein a wind turbine is pushed to rotate by flue gas flow, an auxiliary motor is turned off at the moment, and a cam is driven to rotate by the rotation of the wind turbine, so that a piston plate of an air supply mechanism is driven to reciprocate, sufficient air is fed into a combustion passage for full combustion of coal gas, the combustion rate of the coal gas is improved, and the calcination efficiency is improved.
(2) According to the device and the method for preparing the composite titanium dioxide, redundant gas generated in the tank body enters the volatilization branch channel through the vent hole arranged at the top, the volatilization branch channel is communicated with the combustion channel, the gas is combusted, and the pollution emission is effectively reduced.
(3) According to the preparation device and method of the composite titanium dioxide, the temperature monitoring system is arranged to monitor the temperature in the combustion channel constantly, so that the calcination temperature is guaranteed, the accuracy of the calcination temperature is improved, the calcination quality is improved, and the production efficiency of the titanium dioxide is improved.
(4) According to the device and the method for preparing the composite titanium dioxide, provided by the invention, the fresh air can continuously and rapidly flow into the combustion channel through the arranged air supply mechanism, so that the media can be completely and fully combusted, the combustion efficiency is improved, the stability of the calcination temperature is ensured, the generation of byproducts in the calcination process is reduced, and the calcination quality and the yield are improved. In order to improve the accuracy of temperature control, the air quantity entering the combustion channel is controlled to ensure that the coal gas is fully combusted; and the effect of saving electric power energy is played, and the energy utilization rate of waste gas is improved.
(5) According to the preparation device and method of the composite titanium dioxide, the acquired temperature signals are processed, so that the temperature accuracy reaches within 0.1 ℃, the interference resistance of external noise is reduced, the accuracy of temperature monitoring in a combustion channel is improved, the calcination efficiency is improved, and the generation quality of solid titanium is improved.
(6) According to the preparation device and method of the composite titanium dioxide, the accuracy of temperature monitoring is further improved and the calcination quality is further improved through the classification training processing of the temperature data.
(7) According to the preparation device and method of the composite titanium dioxide, the relationship between the temperature T of full combustion of coal gas and the air inflow Q in the combustion channel in unit time T1 is limited, so that the accuracy of temperature control is improved, the air quantity entering the combustion channel is controlled to ensure full combustion of the coal gas, the temperature in the combustion channel is judged according to the rotating speed of a wind turbine and the rotating speed of an auxiliary motor, and the control accuracy of the combustion temperature is improved.
(8) The invention relates to a preparation device and a preparation method of composite titanium dioxide, which further ensure that coal gas is fully combusted, improve the combustion efficiency, ensure the calcination temperature to be stable and improve the yield of generated solid titanium by limiting the air inflow Q in a combustion channel, the rotating speed of a wind turbine and the rotating speed of an auxiliary motor, the air flow rates of a first air supply pipe and a second air supply pipe when the wind turbine pushes a piston plate to work, and the relationship between the air flow rates of the first air supply pipe and the second air supply pipe and the air inflow in the combustion channel when the auxiliary motor pushes the piston plate to work.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of the combustion duct structure of the present invention.
Fig. 3 is a schematic view of the internal structure of the first container of the present invention.
Fig. 4 is a schematic structural diagram of the air blowing mechanism of the present invention.
Fig. 5 is a schematic view of a first air inlet of the air blowing mechanism of the present invention.
Fig. 6 is a schematic view of the piston plate structure of the present invention.
FIG. 7 is a schematic view of a first damper construction of the present invention.
FIG. 8 is a schematic view of a second damper construction of the present invention.
FIG. 9 is a block diagram of the control system of the present invention.
FIG. 10 is a block diagram of a thermometry module system of the present invention.
In the figure: 1. an outer housing; 2. a tank body; 3. volatilizing and separating; 4. a combustion channel; 5. a gas pipe; 6. a gas transmission port; 7. a discharge flue; 8. an air supply mechanism; 9. a filter; 10. a calcination chamber; 11. a feed inlet; 12. a discharge opening; 71. a first case; 72. a wind turbine; 73. an auxiliary motor; 74. a cam; 75. a connecting rod; 81. a second box body; 82. a telescopic rod; 83. a piston plate; 84. a first air inlet; 85. a second air inlet; 86. a first air supply outlet; 87. a second air supply outlet; 88. a first blast pipe; 89. a second blast pipe; 810. a rubber ring; 811. a first damper; 812. a third box body; 813. a second damper.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, a device for preparing composite titanium dioxide comprises an outer shell 1 and a tank body 2; the tank body 2 is arranged in the outer shell 1, the bottom of the outer shell 1 is provided with supporting legs, a multilayer structure is arranged between the outer shell 1 and the tank body 2, one side close to the outer shell 1 is provided with a cooling pipe, the cooling pipe is uniformly distributed on the inner wall of the outer shell 1, one side of the cooling pipe close to the tank body 2 is provided with a volatilization branch passage 3, a plurality of layers of combustion passages 4 are arranged between the volatilization branch passage 3 and the tank body 2, each layer of combustion passage 4 is paved with a gas pipe 5, and a calcining chamber 10 is arranged in the tank body 2;
the top of the tank body 2 is provided with a plurality of air vents which are communicated with the top of the volatilization branch passage 3, and the volatilization branch passage 3 and each combustion passage 4 are provided with a communication port; the top of the tank body 2 is provided with a feeding port 11, and the bottom of the tank body 2 is provided with a discharging port 12; the top of the combustion channel 4 is provided with a discharge channel 7, an air supply mechanism 8 is arranged below the discharge channel 7, the air supply mechanism 8 is provided with an air supply pipe, and air is supplied into the combustion channel 4 in an accelerated manner through the air supply pipe.
The combustion channels 4 are arranged on two sides of the tank body 2, the combustion channels 4 on two sides are communicated with the top of the outer shell 1, the gas pipes 5 arranged in the discharge channels 7 on two sides are communicated with gas transmission ports 6, and the gas pipes 5 supply combustion gas through the gas transmission ports 6.
Example two:
referring to fig. 3-6, on the basis of the first embodiment, a filter 9 is disposed in the discharge flue 7, and a first box 71 is disposed on a side away from the filter 9, wherein the first box 71 is cylindrical and disposed along an axial direction of the discharge flue 7; a wind turbine 72 is arranged in the first box body 71, an output shaft of the wind turbine 72 is connected with a cam 74, the other side of the cam 74 deviating from the center of the circle is rotatably connected with a connecting rod 75, and the other end of the connecting rod 75 penetrates through the first box body 71; an auxiliary motor 73 is arranged on one side of the wind turbine 72 close to the cam 74, and the auxiliary motor 73 and the wind turbine 72 can jointly drive the cam 74 to operate.
Example three:
referring to fig. 7-8, on the basis of the first embodiment, the first air inlet 84 and the second air inlet 85 are provided with a first air door 811, the first air door 811 and a second air door 813 are both arranged on the inner side of the second box 81, and the first air door 811 and the second air door 813 are rotatably connected with the inner side wall of the second box 81 through hinges; a third box body 812 is arranged on the outer side of each second air supply outlet 87 of the first air supply outlet 86, the third box bodies 812 are of sealing structures, a first air supply pipe 88 is nested with the third box bodies 812, and a second air supply pipe 89 is nested with the third box bodies 812; a second air door 813 is arranged in the third box body 812, the second air door 813 is arranged on the outer side of the second box body 81, and the second air door 813 is rotatably connected with the outer side wall of the second box body 81 through a set hinge.
Example four:
a preparation method of a preparation device of composite titanium dioxide comprises the following steps:
s1, titanium iron powder reacts with concentrated sulfuric acid to generate titanium sulfite, metatitanic acid is generated after hydrolysis, and the metatitanic acid is added into the tank body 2 through the feed inlet 11 to be calcined;
s2, introducing coal gas into the coal gas pipe 5, simultaneously starting the auxiliary motor 73 to drive the air supply mechanism 8 to supply air into the combustion channel 4, and igniting through an igniter arranged around the bottom of the combustion channel;
s3, after ignition, the combustion flue gas is combusted in the combustion channel 4, the combustion flue gas is discharged outwards along the discharge channel 7, the flue gas flow filtered by the filter 9 pushes the wind turbine 72 to rotate, at the moment, the auxiliary motor 73 is turned off, the cam 74 is driven to rotate by the rotation of the wind turbine 72, so that the piston plate 83 of the air supply mechanism 8 is driven to reciprocate, sufficient air is fed into the combustion channel 4 for full combustion of the coal gas, the coal gas combustion rate is improved, and the calcination efficiency is improved;
s4, in the combustion process, redundant gas generated in the tank body 2 enters the volatilization branch passage 3 through a vent hole arranged at the top, the volatilization branch passage 3 is communicated with the combustion passage 4, and the gas is combusted, so that the pollution emission is effectively reduced;
and S4, discharging from the discharge opening 12 after the calcination is finished, and crushing by a crusher and grinding by a grinder to obtain the titanium dioxide.
In step S3, the plurality of temperature sensors are disposed at the top of the combustion channel 4, the temperature in the combustion channel 4 is collected, the temperature monitoring system is disposed, the temperature in the combustion channel 4 is constantly monitored, the calcination temperature is ensured, the accuracy of the calcination temperature is improved, the calcination quality is improved, and the production efficiency of titanium dioxide is improved.
Example five:
referring to fig. 9-10, on the basis of the fourth embodiment, the temperature detection system includes a single chip, a control module, a display module, a temperature measurement module, an air supply mechanism 8, and a communication system; the temperature measuring module comprises a plurality of temperature sensors and a data acquisition card; the temperature sensor collects the temperature in the combustion channel 4, the temperature is transmitted to the single chip microcomputer through the data acquisition card, the single chip microcomputer eliminates temperature data with large errors through data processing and analysis, accurate temperature data are obtained, then the rotating speed of the auxiliary motor 73 is controlled through the control module, the air supply quantity of the air supply mechanism 8 is further controlled, the combustion degree of coal gas is controlled, the calcination temperature is controlled in real time, and the calcination temperature is displayed through a display screen of the display module in real time.
The temperature measurement module comprises a temperature sensor and a data acquisition card, the data acquisition card acquires temperature data and transmits the temperature data to the control module through serial communication, and the communication system adopts I2And C, a communication protocol, wherein after the control module receives the temperature data information, the control module analyzes and processes the temperature data, eliminates data with larger errors, extracts required data fragments, and increases the accuracy of temperature monitoring after analysis and processing.
When the data acquisition card of the temperature measurement module acquires the temperature through the temperature sensor, the method comprises the following steps that A, the sampling frequency is 1Hz, and 200 effective temperature values are continuously read by the MCU through the data acquisition card every 1 millisecond; b, eliminating the maximum value and the minimum value in the collected effective temperature values, and taking the average value of the remaining data to store the average value in a corresponding array S; c, using a fourth-order wavelet decomposition array S to obtain corresponding detail wavelet coefficient sequences S1, S2, S3, S4 and S5, and performing filtering processing with a certain threshold value on each detail wavelet coefficient sequence to obtain S11, S22, S33, S44 and S55; and D, performing wavelet inverse transformation on the new data set obtained in the step C, and filtering to obtain a pure temperature signal. The collected temperature signals are processed by the method, the temperature accuracy reaches within 0.1 ℃, the interference resistance of external noise is reduced, the accuracy of temperature monitoring in the combustion channel 4 is improved, the calcination efficiency is improved, and the generation quality of solid titanium is improved.
After pure temperature signals are obtained, extracting time domain, frequency domain and time-frequency domain data characteristics of the temperature signals through matlab, layering the data characteristic signals according to different calcination temperature gradients, finding out a clustering center for each layer of temperature data by using a clustering algorithm to obtain fewer data sets, carrying out classifier training on the data sets, and extracting better classification and training results to form a new database; re-layering the new data set, firstly calculating the center of each cluster of data through clustering, then calculating Euclidean distance with the clustering center of each layer of the new database, then adding the distances between the new data set and the clustering centers, and classifying the new data set with the minimum distance into one class, so as to realize layering on the new temperature data set; and judging whether the new temperature data after layering belongs to a smaller set or not until the lowest layer, wherein the mode of judging whether the new temperature data belongs to the smaller set is that whether the new data can be classified and trained to form a new database or not. And finally, outputting the trained classified output temperature, and displaying the temperature through a display of the single chip microcomputer. The accuracy of temperature monitoring is further improved through the method.
Example six:
on the basis of the first embodiment, during the calcination process, the operation of the air supply mechanism 8 is that, when the calcination is initially started, the auxiliary motor 73 is started to operate, and the auxiliary motor 73 drives the cam 74 and the connecting rod 75 to rotate, thereby driving the telescopic rod 82 and the piston plate 83 to rotate at the first positionThe two box bodies 81 are internally reciprocated in a memorable manner, and compressed air enters the combustion channel 4 in the reciprocating process to fully combust gas. After the gas is combusted, the auxiliary motor 73 is turned off, and because the flow velocity of the flue gas is high in the process of being discharged from the discharge flue 7, the wind turbine 72 is arranged in the first box body 71 of the discharge flue 7, the fast flowing flue gas drives the wind turbine 72 to rotate, so that the cam 74 and the connecting rod 75 are driven to rotate, and the air supply mechanism 8 is driven to complete air supply. In the combustion process, if the calcining temperature is kept stable, the wind turbine 72 is always adopted to drive the air supply mechanism 8 to supply air into the combustion channel 4, if the calcining temperature needs to be adjusted, the auxiliary motor 73 is started, and when the temperature needs to be increased, the auxiliary motor 73 is controlled to rotate in the positive direction, the auxiliary motor 73 and the wind turbine 72 work synchronously, the reciprocating motion rate of the piston plate 83 in the air supply mechanism 8 is accelerated, and the air supply rate of the first air supply pipe 88 and the second air supply pipe 89 is increased; if the calcination temperature needs to be lowered, the auxiliary motor 73 is controlled to rotate in the reverse direction, the rotational speed of the driving cam 74 of the wind turbine 72 is reduced, the reciprocating speed of the piston plate 83 in the air supply mechanism 8 is reduced, the air supply rates of the first air supply pipe 88 and the second air supply pipe 89 are reduced, the combustion is insufficient, and the calcination temperature is lowered. The auxiliary motor 73 is connected to the drive shaft of the wind turbine 72 by providing a speed reducer. In order to further ensure that the gas is fully combusted, the combustion efficiency is improved, the calcination temperature is stable, and the yield of generated solid titanium is improved, the air inflow in the combustion passage 4 is Q, when the wind turbine 72 and the auxiliary motor 73 synchronously work, the rotating speed of the wind turbine 72 is n1, the rotating speed of the auxiliary motor 73 is n2, when the wind turbine 72 pushes the piston plate 83 to work, the air flow rates of the first air supply pipe 88 and the second air supply pipe 89 are v1, and when the auxiliary motor 73 pushes the piston plate 83 to work, the air flow rates of the first air supply pipe 88 and the second air supply pipe 89 are v2, so that the air inflow Q in the combustion passage 4 in unit time t satisfies the following formula: q δ · n1+ n2/v12+v221/2t; when the temperature needs to be reduced, the auxiliary motor 73 rotates reversely to do reverse work with the wind turbine 72, and then Q is delta-n 1-n2/v12-v221/2t，n1>n 2; in the above formula, delta is the air inflow coefficient, and the value range is 0.322-6.88; n1, n1 units rad, v1, v2 units m3Min; q is given in g, t units of seconds. The above formulaThe method is an empirical formula, only numerical calculation is carried out during calculation, and unit calculation is not included.
Example seven:
on the basis of the first embodiment, in the air supply process of the air supply mechanism 8, when the telescopic rod 82 drives the piston plate 83 to press down, the first air door 811 of the first air inlet 84 is in an open state under the action of negative pressure, and the first air door 811 of the second air inlet 85 is in a closed state under the action of pressure in the second box 81; meanwhile, the second air door 813 at the position of the first air supply outlet 86 is in a closed state under the action of negative pressure, the second air door 813 arranged on the second air supply outlet 87 is in an open state under the action of the pressure in the second box body 81, and the air in the second box body 81 is accelerated to enter the combustion passage 4 from the second air supply pipe 89 under the action of the downward pressure of the piston plate 83, so that the sufficient oxygen content in the combustion passage 4 is ensured, the coal gas is completely combusted, and the combustion efficiency is improved; when the piston plate 83 moves upward, the first damper 811 of the first air inlet 84 is closed by pressure, the first damper 811 of the second air inlet 85 is opened by negative pressure, the second damper 813 of the first air supply outlet 86 is opened by pressure, the second damper 813 of the second air supply outlet 87 is closed by negative pressure, and the air in the second casing 81 is accelerated from the first air supply pipe 88 into the combustion path 4 by the upward pressure of the piston plate 83. Through the mode, the fresh air can continuously and rapidly flow into the combustion channel 4, so that the media can be completely and fully combusted, the combustion efficiency is improved, the stability of the calcination temperature is ensured, the generation of byproducts in the calcination process is reduced, and the calcination quality and the yield are improved. In order to improve the accuracy of temperature control, the air quantity entering the combustion channel 4 is controlled to ensure that the gas is fully combusted, the temperature T of the fully combusted gas meets the air inflow Q in the combustion channel 4 within unit time T1, T is phi (2Q/T1), phi is a temperature relation coefficient, and the value range is 1.5-4.88; t unit is; in the actual calcination, the temperature in the tank body 2 is at least 1300 ℃, the above formula shows that the unit time is 100 seconds, the temperature relation coefficient is constant 2, if the air input Q is 2000g, the calcination temperature T is 800, if the air input Q is 3000g, the calcination temperature T is 1200, if the air input Q is 3500g, the calcination temperature T is 1400, the above formula shows that when phi is constant 2, experimental data shows that the calcination temperature can be reached only by introducing 3500g of air into the combustion channel 4 in 100 seconds, and the above formula can control the temperature in the combustion channel 4 according to the rotating speed of the wind turbine 72 and the rotating speed of the auxiliary motor 73. And contributes to improving the control accuracy of the combustion temperature. The above formula is an empirical formula, and only numerical calculation is performed during calculation, and unit calculation is not included.
The device obtained by the technical scheme is a device and a method for preparing the composite titanium dioxide, the rotation of the wind turbine is pushed by flue gas flow, the auxiliary motor is turned off at the moment, the cam is driven to rotate by the rotation of the wind turbine, so that the piston plate of the air supply mechanism is driven to reciprocate, sufficient air is fed into a combustion passage to be fully combusted, the combustion rate of coal gas is improved, and the calcining efficiency is improved. The unnecessary gas that produces in the jar body gets into the volatile minute tunnel through the air vent that the top set up, and volatile minute tunnel and burning way intercommunication, gas burn, effective pollution abatement emission. Set up temperature monitoring system, constantly monitor the temperature in the burning way, guarantee the calcination temperature, improve the accuracy nature of calcination temperature, improve and calcine the quality, promote the production efficiency of titanium white powder. Fresh air can flow into the combustion channel continuously and rapidly through the arranged air supply mechanism, so that media can be completely and fully combusted, the combustion efficiency is improved, the stability of the calcination temperature is ensured, the generation of byproducts in the calcination process is reduced, and the calcination quality and the yield are improved. In order to improve the accuracy of temperature control, the air quantity entering the combustion channel is controlled to ensure that the coal gas is fully combusted; and the effect of saving electric power energy is played, and the energy utilization rate of waste gas is improved. Through processing the acquired temperature signals, the temperature accuracy reaches within 0.1 ℃, the interference resistance of external noise is reduced, the accuracy of temperature monitoring in a combustion channel is improved, the calcination efficiency is improved, and the generation quality of solid titanium is improved. Through the classification training processing of the temperature data, the accuracy of temperature monitoring is further improved, and the calcining quality is further improved. The temperature control accuracy is improved by limiting the relation between the temperature T of the full combustion of the gas and the air inflow Q in the combustion channel in unit time T1, the air amount entering the combustion channel is controlled to ensure the full combustion of the gas, and the temperature in the combustion channel is judged according to the rotating speed of the wind turbine and the rotating speed of the auxiliary motor, so that the control accuracy of the combustion temperature is improved. By limiting the air inflow Q in the combustion channel, the rotating speed of the wind turbine and the rotating speed of the auxiliary motor, when the wind turbine pushes the piston plate to work, the air flow rates of the first air supply pipe and the second air supply pipe, and when the auxiliary motor pushes the piston plate to work, the relationship between the air flow rates of the first air supply pipe and the second air supply pipe and the air inflow in the combustion channel further ensures that coal gas is fully combusted, the combustion efficiency is improved, the calcination temperature is stable, and the yield of generated solid titanium is improved.
Other technical solutions not described in detail in the present invention are prior art in the field, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation device of composite titanium dioxide comprises an outer shell (1) and a tank body (2); the energy-saving gas-fired boiler is characterized in that the tank body (2) is arranged inside the outer shell (1), supporting legs are arranged at the bottom of the outer shell (1), a multilayer structure is arranged between the outer shell (1) and the tank body (2), a cooling pipe is arranged on one side close to the outer shell (1), the cooling pipe is uniformly distributed on the inner wall of the outer shell (1), a volatilization branch passage (3) is arranged on one side close to the tank body (2) of the cooling pipe, a plurality of layers of combustion passages (4) are arranged between the volatilization branch passage (3) and the tank body (2), a gas pipe (5) is laid on each layer of combustion passages (4), and a calcining chamber (10) is arranged inside the tank body (2);
the top of the tank body (2) is provided with a plurality of air vents, the air vents are communicated with the top of the volatilization branch channel (3), and the volatilization branch channel (3) and each combustion channel (4) are provided with communicated ports; the top of the tank body (2) is provided with a feeding port (11), and the bottom of the tank body (2) is provided with a discharging port (12); the top of the combustion channel (4) is provided with a discharge channel (7), an air supply mechanism (8) is arranged below the discharge channel (7), the air supply mechanism (8) is provided with an air supply pipe, and air is supplied into the combustion channel (4) in an accelerated manner through the air supply pipe.
2. The preparation device of composite titanium dioxide according to claim 1, wherein the combustion channels (4) are arranged on two sides of the tank body (2), the combustion channels (4) on the two sides are communicated with each other at the top of the outer shell (1), the gas pipes (5) arranged in the discharge channels (7) on the two sides are communicated with the gas transfer ports (6), and the gas pipes (5) supply combustion gas through the gas transfer ports (6).
3. The preparation device of composite titanium dioxide according to claim 1, wherein a filter (9) is arranged in the discharge flue (7), a first box body (71) is arranged on the side away from the filter (9), and the first box body (71) is of a cylindrical structure and is arranged along the axial direction of the discharge flue (7); a wind turbine (72) is arranged in the first box body (71), an output shaft of the wind turbine (72) is connected with a cam (74), the other side of the cam (74) deviates from the center of a circle and is rotatably connected with a connecting rod (75), and the other end of the connecting rod (75) penetrates through the first box body (71); an auxiliary motor (73) is arranged on one side of the wind turbine (72) close to the cam (74), and the auxiliary motor (73) and the wind turbine (72) can jointly drive the cam (74) to operate.
4. The preparation device of composite titanium dioxide according to claim 3, wherein the air supply mechanism (8) comprises a second box body (81), the second box body (81) is of a sealed cuboid structure, a piston plate (83) is arranged in the second box body (81), one side of the piston plate (83) is connected with a telescopic rod (82), and the other end of the telescopic rod (82) penetrates through the wall of the second box body (81) to be rotatably connected with the connecting rod (75) and forms a gap sliding connection with the wall of the second box body (81).
5. The preparation device of composite titanium dioxide according to claim 4, wherein the side walls of the two ends of the second box body (81) are provided with air inlets, one side of the second box body close to the telescopic rod (82) is provided with a first air inlet (84), the other side of the second box body is provided with a second air inlet (85), and the first air inlet (84) is arranged below the telescopic rod (82); one side of the second box body (81) close to the outer shell (1) is provided with a first air supply outlet (86) and a second air supply outlet (87), the first air supply outlet (86) is connected with a first air supply pipe (88), the second air supply outlet (87) is connected with a second air supply pipe (89), and the first air supply branch pipe and the second air supply branch pipe are connected with a combustion channel in the outer shell (1) and communicated with each other.
6. The device for preparing the composite titanium dioxide according to claim 4, wherein a rubber ring (810) is arranged on the periphery of the piston plate (83), and the rubber ring (810) is in sealed sliding connection with the inner side wall of the second box body (81).
7. The preparation device of composite titanium dioxide according to claim 5, wherein the first air inlet (84) and the second air inlet (85) are provided with a first air door (811), the first air door (811) and a second air door (813) are both arranged on the inner side of the second box body (81), and the first air door (811) and the second air door (813) are rotatably connected with the inner side wall of the second box body (81) through arranged hinges; a third box body (812) is arranged on the outer side of a second air supply outlet (87) of the first air supply outlet (86), the third box body (812) is of a sealing structure, a first air supply pipe (88) and the third box body (812) are nested, and a second air supply pipe (89) and the third box body (812) are nested; and a second air door (813) is arranged in the third box body (812), the second air door (813) is arranged on the outer side of the second box body (81), and the second air door (813) is rotatably connected with the outer side wall of the second box body (81) through a set hinge.
8. The preparation method of the preparation device of the composite titanium dioxide according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, titanium iron powder reacts with concentrated sulfuric acid to generate titanium sulfite, metatitanic acid is generated after hydrolysis, and the metatitanic acid is added into the tank body through a feed inlet and calcined;
s2, introducing coal gas into the coal gas pipe, simultaneously starting the auxiliary motor to drive the air supply mechanism to supply air into the combustion channel, and igniting through an igniter arranged at the bottom of the combustion channel;
s3, after ignition, combustion is carried out in the combustion channel, combustion smoke is discharged outwards along the discharge channel, smoke airflow filtered by the filter pushes the wind turbine to rotate, at the moment, the auxiliary motor is turned off, the cam is driven to rotate by the rotation of the wind turbine, so that the piston plate of the air supply mechanism is driven to reciprocate, sufficient air is supplied to the combustion channel, coal gas is fully combusted, the coal gas combustion rate is improved, and the calcination efficiency is improved;
s4, in the combustion process, redundant gas generated in the tank body enters the volatilization branch channel through a vent hole arranged at the top, the volatilization branch channel is communicated with the combustion channel, and the gas is combusted, so that the pollution emission is effectively reduced;
and S4, discharging from a discharge opening after the calcination is finished, and crushing by a crusher and grinding by a grinder to obtain the titanium dioxide.
9. The method for preparing the device for preparing composite titanium dioxide according to claim 8, wherein in step S3, the temperature in the combustion channel is collected by arranging a plurality of temperature sensors at the top of the combustion channel, and a temperature monitoring system is arranged to constantly monitor the temperature in the combustion channel, so as to ensure the calcination temperature, improve the accuracy of the calcination temperature, improve the calcination quality, and improve the production efficiency of titanium dioxide.
10. The preparation method of the device for preparing composite titanium dioxide according to claim 9, wherein the temperature detection system comprises a single chip microcomputer, a control module, a display module, a temperature measurement module, an air supply mechanism and a communication system; the temperature measuring module comprises a plurality of temperature sensors and a data acquisition card; the temperature sensor collects the temperature in the combustion channel, the temperature is transmitted into the single chip microcomputer through the data acquisition card, the single chip microcomputer eliminates temperature data with large errors through data processing and analysis, accurate temperature data are obtained, then the rotating speed of the auxiliary motor is controlled through the control module, and further the air supply quantity of the air supply mechanism is controlled, so that the combustion degree of coal gas is controlled, the calcination temperature is controlled in real time, and the calcination temperature is displayed through a display screen of the display module in real time.
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