CN113041986A - Titanium dioxide oxidation reactor by chlorination process - Google Patents
Titanium dioxide oxidation reactor by chlorination process Download PDFInfo
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- CN113041986A CN113041986A CN202110289503.5A CN202110289503A CN113041986A CN 113041986 A CN113041986 A CN 113041986A CN 202110289503 A CN202110289503 A CN 202110289503A CN 113041986 A CN113041986 A CN 113041986A
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 23
- 230000003647 oxidation Effects 0.000 title claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 20
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 18
- 238000005660 chlorination reaction Methods 0.000 title claims abstract description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 117
- 238000010438 heat treatment Methods 0.000 claims abstract description 82
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000001301 oxygen Substances 0.000 claims abstract description 49
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000000171 quenching effect Effects 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 30
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 239000011819 refractory material Substances 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000001012 protector Effects 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 7
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 17
- 235000010215 titanium dioxide Nutrition 0.000 description 12
- 230000009471 action Effects 0.000 description 10
- 229910003074 TiCl4 Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- BOKGTLAJQHTOKE-UHFFFAOYSA-N 1,5-dihydroxynaphthalene Chemical compound C1=CC=C2C(O)=CC=CC2=C1O BOKGTLAJQHTOKE-UHFFFAOYSA-N 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/07—Producing by vapour phase processes, e.g. halide oxidation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a titanium dioxide oxidation reactor by a chlorination process, which comprises a heating section, a reaction section and a quenching section, wherein the heating section is integrally divided into a left section, a middle section and a right section, and the three sections are fixed together through flange plates to form a furnace body; the heating section left end middle part is provided with toluene rifle interface, is provided with one to four hot oxygen inlet pipe mouths on the external diameter face of heating section left end, and hot oxygen inlet pipe mouth uses the heating section centre of a circle as central annular array and distributes on the heating section, and the axial lead of hot oxygen inlet pipe mouth and heating section is 60 to 85 degrees contained angles. According to the invention, by utilizing the reasonable layout of the hot oxygen inlet pipe orifices, the hot oxygen enters the heating section and then spirally flows forwards along the axial direction of the inner wall of the heating section, so that the inner wall of the equipment is prevented from being directly burnt by flame, and the service life of the equipment is prolonged; the titanium tetrachloride air chamber adopting the volute shape design can effectively ensure the stable flow pressure of titanium tetrachloride, so that the hot oxygen and the titanium tetrachloride are fully mixed and reacted, and the quality of the semi-finished base material generated by the reaction is improved.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a chlorination-process titanium dioxide oxidation reactor.
Background
The oxidation reactor is a core device in the production process of titanium white by a chlorination process, and is a key factor influencing whether the whole device for titanium white by a chlorination process can normally operate and whether a high-quality product can be produced. In the industrialized chlorination-process titanium dioxide production process, TiCl4 and O2 are reacted in a very short time under the conditions of high temperature and pressure, and micron-sized TiO2 particles are generated. In the reaction process, the problem of (1) reasonable reactor structure is to ensure that the particle size distribution of the product reaches the requirement of pigment grade TiO 2. (2) The reasonable structural design of the heating section enables O2 to be heated uniformly from 900 ℃ to about 1600 ℃ in a short time. (3) The temperature of the heating section is very high, the highest temperature of a toluene combustion area reaches 3000 ℃, and a reasonable equipment structure is selected to ensure that the flow field is reasonable and the service life of the equipment is ensured. (4) The corrosion resistance of TiCl4 and the high-speed gas stream erosion at the TiCl4 feeding ring outlet are all properly selected. (5) The method comprises the following steps of (1) adopting a specially designed TiCl4 feeding ring to ensure that radial TiCl4 gas is fed in a pressure-equalizing and flow-stabilizing manner, so that the product is uniform in particle size, (6) protecting the TiCl4 feeding ring in a reasonable cooling manner, and (7) ensuring that fine TiO2 particles are very easy to stick to the wall, wherein reliable 'scar prevention' and 'scar removal' measures are required.
Under such harsh process conditions, the current domestic oxidation reactor has many defects:
1. the heating section directly runs at the high temperature of the mixture of hot oxygen and toluene flame, the service life of the equipment lining is quite short, and the refractory material needs to be replaced regularly;
2. the adding flow and pressure of the titanium tetrachloride at the mixing section are not uniform enough due to the structure of the equipment, so that the quality and the operation effect of the oxidation base material product are influenced;
3. when a toluene gun is inserted into the heating section through a toluene gun interface to provide a burning sintering beam, and the toluene gun is taken out, the heat mass in the heating section is easy to flow reversely;
4. when gas is burnt in the heating section, the heating section is easily damaged due to the action of high temperature and high pressure easily generated at the moment of burning.
Therefore, it is necessary to invent a chlorination process titanium dioxide oxidation reactor to solve the above problems.
Disclosure of Invention
In view of the above problems, the present invention provides a titanium dioxide oxidation reactor by chlorination process to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the chlorination process titanium dioxide oxidation reactor comprises a heating section, a reaction section and a quenching section, wherein the heating section is integrally divided into a left section, a middle section and a right section, and the three sections are fixed together through flange plates to form a furnace body; a toluene gun interface is arranged in the middle of the left end of the heating section, one to four hot oxygen inlet nozzles are arranged on the outer diameter surface of the left end of the heating section, the hot oxygen inlet nozzles are distributed on the heating section in an annular array by taking the center of a circle of the heating section as a center, and an included angle of 60 to 85 degrees is formed between the hot oxygen inlet nozzles and the axial lead of the heating section;
the right end of the heating section is communicated with the reaction section, the reaction section is composed of an air inlet chamber and feeding rings, the air inlet chamber is of a volute annular structure, a plurality of feeding rings are fixed on the inner wall of the air inlet chamber, a pipe channel is formed between every two adjacent feeding rings, a high-temperature-resistant variable-diameter ceramic pipe is fixed on the inner wall of the pipe channel, and the variable-diameter ceramic pipe is a ceramic pipe with the diameter gradually reduced from outside to inside;
the air inlet chamber is provided with a titanium tetrachloride air inlet, the air inlet chamber is provided with a reaction section air inlet and a reaction section air outlet along the axial direction of the hot section, the reaction section air inlet is communicated with the right end of the heating section, the reaction section air outlet is communicated with the left end of the quenching section, the quenching section is a gas-liquid heat exchanger, and the base material coming out of the reaction section enters the gas-liquid heat exchanger for heat exchange and cooling.
Furthermore, the number of the tube channels is four to twelve, the body of the heating section is composed of a shell and a refractory heat-insulating material, the material of the shell is nickel-based alloy material, and the inner lining of the refractory heat-insulating material is fixed on the inner wall of the shell.
Further, hot oxygen inlet pipe mouth and heating section still can be for perpendicular tangential setting, and the inside lining refractory material of hot oxygen inlet pipe mouth, the oblique cut hole has been seted up to the heating section inside lining, and oxygen inlet pipe mouth passageway links to each other with the oblique cut hole, the oblique cut hole sets up through pouring refractory material integrated into one piece with hot oxygen inlet pipe mouth passageway, the oblique cut is 45 to 75 degrees settings with heating section axial contained angle.
Furthermore, the inner diameter of a cavity structure in the volute annular structure of the air inlet chamber can be reduced in a spiral manner from large to small, and the shell of the air inlet chamber is made of a nickel-based alloy steel plate; the feeding ring in the air inlet chamber is of an annular solid structure and is made of nickel-based alloy forging materials, 8-16 pipe channels are uniformly distributed on the periphery of the feeding ring, the pipe channels are gradually reduced from outside to inside in diameter, and the inside of each pipe channel is tightly lined with a variable-diameter high-temperature-resistant ceramic pipe.
Further, the fixed cover that widens that has cup jointed of toluene rifle interface one end, widen the cover and set up for integrated into one piece with toluene rifle interface, the toluene rifle interface is located one section of widening the cover inside and has seted up the widening hole, the cross sectional shape in widening the hole is the rectangle setting, and interior roof and interior bottom wall all articulate there is the baffle, baffle surface through connection has the arc pole, arc pole one end with widen downthehole wall fixed connection, and the surface cup joints first spring, widen the cover and be located the one end of heating section inside and evenly seted up a plurality of guard slot, the inside protector that is provided with of guard slot.
Further, protector includes plunger and buffer spring, the plunger is the setting that slides of precision fit idol with the protection groove inner wall, the buffer spring both ends all are provided with the spring holder, and protection groove one end and widen and set up the bleeder vent between the outside, one of them the spring holder is located the setting of bleeder vent position for the through-hole, two be provided with hydraulic buffer between the spring holder.
Further, hydraulic buffer includes a hydraulic cylinder and a push rod, push rod one end is pegged graft with the inside slip of a hydraulic cylinder and is had the setting, and fixedly connected with piston, the inside hydraulic oil that is provided with of a hydraulic cylinder, and the volume of hydraulic oil is less than half of a hydraulic cylinder volume and sets up, link up between the piston both sides and be provided with a plurality of inlet means and go out the liquid device, and inlet means's quantity is less than the quantity of going out the liquid device.
Further, inlet means and play liquid device all include worker's shape passageway, the inside one end of worker's shape passageway is provided with the sealing plug, sealing plug surface activity through connection has T shape pole, the second spring has been cup jointed on T shape pole surface, T shape pole one end fixedly connected with filter plate, the filter plate surface is even poroid setting, and with worker's shape passageway inner wall fixed connection, inlet means and the inside sealing plug direction of play liquid device set up for opposite.
The invention has the technical effects and advantages that:
1. according to the invention, by utilizing the reasonable layout of the hot oxygen inlet pipe orifices, the hot oxygen enters the heating section and then spirally flows forwards along the axial direction of the inner wall of the heating section, so that the inner wall of the equipment is prevented from being directly burnt by the flame of a toluene gun, and the service life of the equipment is prolonged; the titanium tetrachloride air chamber adopting the volute shape design can effectively ensure the stable flow pressure of titanium tetrachloride, so that the hot oxygen and the titanium tetrachloride are fully mixed and reacted, and the quality of the semi-finished base material generated by the reaction is improved.
2. The widened sleeve is arranged, the widened sleeve is pushed open by the two baffle plates, and the baffle plates recover the closing device under the action of the first spring, so that the backflow of the hot medium in the heating section is effectively prevented.
3. According to the invention, the protection device is arranged, so that the plunger inside the protection groove is compressed, the plunger compresses the buffer spring, the space inside the heating section is increased, and high-pressure gas exerts pressure on the inside of the protection groove, thereby preventing the damage caused by instantaneous high pressure inside the heating section.
4. According to the invention, the hydraulic buffer device is arranged, the plunger piston slowly restores to the original position under the action of the buffer spring, and the process is that the sealing plug in the liquid inlet device is pushed open, so that gas and hydraulic oil slowly flow to one side of the piston, and the phenomenon that the plunger piston quickly restores to the original position under the action of the buffer spring to generate inertia force, so that the buffer spring and the plunger piston fall off and are damaged is prevented.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows an overall structural schematic of an embodiment of the present invention;
FIG. 2 shows a cross-sectional view A-A of FIG. 1 of the present invention;
FIG. 3 illustrates a cross-sectional view B-B of FIG. 1 in accordance with the present invention;
FIG. 4 shows a cross-sectional view of the overall structure of an embodiment of the present invention;
FIG. 5 shows a left side view of the overall structure of an embodiment of the present invention;
FIG. 6 shows a left side view of the structure of the reaction section of an embodiment of the present invention;
FIG. 7 shows an enlarged view of section A of FIG. 4 in accordance with an embodiment of the present invention;
FIG. 8 shows an enlarged view of section B of FIG. 7 in accordance with an embodiment of the present invention;
FIG. 9 shows an enlarged view of section C of FIG. 8 of an embodiment of the present invention;
in the figure: 1. a heating section; 2. a reaction section; 2a, a reaction section air inlet; 2b, a gas outlet of the reaction section; 3. a quenching section; 4. a hot oxygen inlet pipe orifice; 401. a bevel notch; 5. a flange plate; 6. a refractory heat insulating material; 7. a toluene gun interface; 701. widening the sleeve; 702. widening the hole; 703. a baffle plate; 704. an arcuate bar; 705. a first spring; 706. a protective bath; 707. a plunger; 708. a buffer spring; 709. a spring seat; 710. air holes are formed; 711. a hydraulic cylinder; 712. a push rod; 713. a piston; 714. an I-shaped channel; 715. a sealing plug; 716. a T-shaped rod; 717. a second spring; 718. filtering the plate; 8. a titanium tetrachloride gas inlet; 9. a tube passageway; 10. an air intake chamber; 11. and (4) feeding a ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a titanium dioxide oxidation reactor by a chlorination process, which comprises a heating section 1, a reaction section 2 and a quenching section 3, wherein the heating section 1 is integrally divided into a left section, a middle section and a right section, and the three sections are fixed together through a flange 5 to form a furnace body; a toluene gun interface 7 is arranged in the middle of the left end of the heating section 1, one to four hot oxygen inlet nozzles 4 are arranged on the outer diameter surface of the left end of the heating section 1, the hot oxygen inlet nozzles 4 are distributed on the heating section 1 in an annular array by taking the circle center of the heating section 1 as the center, and an included angle of 60 to 85 degrees is formed between the hot oxygen inlet nozzles 4 and the axial lead of the heating section 1;
the right end of the heating section 1 is communicated with the reaction section 2, the reaction section 2 is composed of an air inlet chamber 10 and feeding rings 11, the air inlet chamber 10 is of a volute annular structure, a plurality of feeding rings 11 are fixed on the inner wall of the air inlet chamber 10, a pipe channel 9 is formed between every two adjacent feeding rings 11, a high-temperature-resistant variable-diameter ceramic pipe is fixed on the inner wall of the pipe channel 9, and the variable-diameter ceramic pipe is a ceramic pipe with the diameter gradually reduced from outside to inside;
the air inlet chamber 10 is provided with a titanium tetrachloride air inlet 8, the air inlet chamber 10 is provided with a reaction section air inlet 2a and a reaction section air outlet 2b along the axial direction of the hot section, the reaction section air inlet 2a is communicated with the right end of the heating section 1, the reaction section air outlet 2b is communicated with the left end of the quenching section 3, the quenching section 3 is a gas-liquid heat exchanger, the base material from the reaction section 2 enters the gas-liquid heat exchanger for heat exchange and cooling, and the reasonable layout of hot oxygen inlet pipe orifices 4 is utilized to enable the hot oxygen to flow forwards spirally along the axial direction of the inner wall of the heating section 1 after entering the heating section, so that the inner wall of the equipment is prevented from being directly; the titanium tetrachloride air chamber adopting the volute shape design can effectively ensure the stable flow pressure of titanium tetrachloride, so that the hot oxygen and the titanium tetrachloride are fully mixed and reacted, and the quality of the semi-finished base material generated by the reaction is improved.
In one embodiment of the present invention, the number of the tube passages 9 is four to twelve, the body of the heating section 1 is composed of a shell made of a nickel-based alloy material and a refractory heat insulating material 6 lining and fixed on the inner wall of the shell.
The hot oxygen inlet pipe orifice 4 and the heating section 1 can also be arranged in a vertical tangential manner, the hot oxygen inlet pipe orifice 4 is internally lined with refractory materials, the heating section 1 is internally lined with an oblique cutting hole 401, a channel of the oxygen inlet pipe orifice 4 is connected with the oblique cutting hole 401, the oblique cutting hole 401 and the channel of the hot oxygen inlet pipe orifice 4 are integrally formed by pouring the refractory materials, an axial included angle between the oblique cutting hole 401 and the heating section 1 is set to be 45-75 degrees, and the hot oxygen inlet pipe orifice 4 and the outer surface of the heating section 1 are arranged vertically, so that the shear stress of the hot poplar inlet pipe orifice 4 is effectively reduced, and the service life of the hot oxygen inlet pipe orifice 4 is prolonged.
According to a specific embodiment of the invention, the inner diameter of the cavity structure inside the volute-type annular structure of the air inlet chamber 10 can be reduced in a spiral manner from large to small, and the shell of the air inlet chamber 10 is made of a nickel-based alloy steel plate; the feeding ring 11 inside the air inlet chamber 10 is of a circular ring type solid structure and is made of a nickel-based alloy forging material, 8-16 tube channels 9 are uniformly distributed on the periphery of the feeding ring 11, the tube channels 9 are gradually reduced from outside to inside in diameter, the inside of each tube channel 9 is tightly lined with a reducing high-temperature resistant ceramic tube, when titanium tetrachloride enters the air inlet chamber 10 through a titanium tetrachloride air inlet 8 and passes through a volute structure of the air inlet chamber 10 to be mixed in the conveying process, then the titanium tetrachloride is mixed with hot oxygen combusted through the tube channels 9, the titanium tetrachloride is discharged into a quenching section 3 through a reaction section air outlet 2b to be cooled, and through the volute structure of the air inlet chamber 10, the gas mixing efficiency is effectively increased, and the reaction effect is.
In order to implement the method, one end of the toluene gun interface 7 is fixedly sleeved with a widening sleeve 701, the widening sleeve 701 and the toluene gun interface 7 are integrally formed, a section of the toluene gun interface 7 located inside the widening sleeve 701 is provided with a widening hole 702, the cross section of the widening hole 702 is rectangular, the inner top wall and the inner bottom wall are hinged with a baffle 703, the surface of the baffle 703 is connected with an arc-shaped rod 704 in a penetrating manner, one end of the arc-shaped rod 704 is fixedly connected with the inner wall of the widening hole 702, the surface of the arc-shaped rod is sleeved with a first spring 705, one end of the widening sleeve 701 located inside the heating section 1 is uniformly provided with a plurality of protective grooves 706, the protective devices are arranged inside the protective grooves 706, and by arranging the protective devices, the plunger 707 inside the protective grooves 706 is compressed, so that the plunger 707 compresses the buffer spring 708, and the space inside the heating section 1 is increased, the high-pressure gas is pressurized to the inside of the shield bath 706, thereby preventing damage due to instantaneous high pressure inside the heating section 1.
As an embodiment of the present invention, the guard comprises a plunger 707 and a buffer spring 708, the plunger 707 and the inner wall of the protection groove 706 are arranged in a sliding way in a precise matching manner, two ends of the buffer spring 708 are provided with spring seats 709, and a vent hole 710 is formed between one end of the protection slot 706 and the outside of the widening sleeve 701, one of the spring seats 709 is arranged at the position of the vent hole 710 and is provided with a through hole, a hydraulic buffer device is arranged between the two spring seats 709, by providing a hydraulic buffer, plunger 707 is slowly returned to its original position by buffer spring 708, the process is that the sealing plug 715 in the liquid inlet device is pushed open, so that the gas and the hydraulic oil slowly flow to one side of the piston 713, thereby preventing the plunger 707 from rapidly restoring to the original position under the action of the buffer spring 708 to generate an inertia force, which causes falling-off damage between the buffer spring 708 and the plunger 707.
As a specific embodiment of the present invention, the hydraulic buffer device includes a hydraulic cylinder 711 and a push rod 712, one end of the push rod 712 is slidably inserted into the hydraulic cylinder 711, and is fixedly connected with a piston 713, hydraulic oil is disposed in the hydraulic cylinder 711, the volume of the hydraulic oil is smaller than half of the volume of the hydraulic cylinder 711, a plurality of liquid inlet devices and liquid outlet devices are disposed between two sides of the piston 713 in a penetrating manner, and the number of the liquid inlet devices is smaller than that of the liquid outlet devices, which is beneficial to preventing the plunger 707 from rapidly restoring to the original position to generate an inertial force under the action of the buffer spring 708, so as to cause the falling damage between the buffer spring 708 and the plunger 707.
As a specific embodiment of the present invention, the liquid inlet device and the liquid outlet device both include an i-shaped channel 714, one end inside the i-shaped channel 714 is provided with a sealing plug 715, the surface of the sealing plug 715 is movably connected with a T-shaped rod 716 in a penetrating manner, the surface of the T-shaped rod 716 is sleeved with a second spring 717, one end of the T-shaped rod 716 is fixedly connected with a filter plate 718, the surface of the filter plate 718 is uniformly arranged in a hole shape and is fixedly connected with the inner wall of the i-shaped channel 714, the directions of the sealing plugs 715 inside the liquid inlet device and the liquid outlet device are opposite, the hot oxygen inlet tube opening 4 is rotated through the adjustable setting of the angle of the oxygen inlet tube opening, the sealing ball 401 at one end of the hot oxygen inlet tube opening 4 is rotated inside the ball groove 402, one end of the i-shaped rod 406 is inserted into the corresponding slot 409, so as to change the, the heating efficiency is increased.
The working principle of the invention is as follows:
referring to the attached drawings 1-9 of the specification, preheated high-temperature hot oxygen (950 ℃) enters a heating section 1, flows forwards spirally along the inner wall of equipment through a hot oxygen pipe interface, a toluene gun interface 7 is arranged at the top end of the heating section 1, the hot oxygen at the periphery is further uniformly heated and heated in the central area of the heating section 1 through high-temperature flame (3000 ℃) of toluene combustion, the heated and mixed hot oxygen (1600 ℃) enters the center of a mixing section along the axial direction of the equipment, preheated titanium tetrachloride gas (450 ℃) enters a reaction section 2, the preheated titanium tetrachloride gas is uniformly distributed through a volute chamber and then enters an oxidation furnace center along the radial direction through a titanium tetrachloride reducing pipe channel 9 to be mixed with the hot oxygen, a rapid reaction and quenching section 3 is formed, generated base material particles continuously grow up, cooling water is sleeved outside the reaction section 2 for forced circulation heat exchange, the base material in the reaction section 2 is rapidly cooled, and the particle size distribution are, the hot oxygen entering the heating section 1 can flow forwards and rapidly along the inner wall of the heating section 1 in a spiral manner, so that the hot oxygen can be uniformly heated by toluene combustion flame in the central area of the heating section 1, the equipment body can be prevented from being directly burned by the flame, the service life of the equipment is prolonged, the volute type air inlet chamber 10 can ensure that the pressure and the flow of the titanium tetrachloride entering the reaction section 2 are uniform and stable, the titanium tetrachloride radially enters the oxidation furnace to be vertically and rapidly and uniformly mixed with high-temperature oxygen, and the titanium tetrachloride is prevented from scouring and corroding the feeding ring 11;
when the toluene gun interface 7 provides burning toluene, on one hand, the initial pressure is small when toluene enters, which causes toluene to diffuse, and on the other hand, when toluene stops being provided, a part of toluene is left in the toluene gun interface 7, which still causes a period of burning time, which affects data errors, so the solution provided by the invention is as follows: when toluene enters the widening hole 702 through the toluene gun interface 7, the toluene is temporarily trapped through the baffle 703, when the toluene pressure is higher and higher, the two baffles 703 are opened, so that the toluene is quickly flushed out of the toluene gun interface 7, the toluene diffusion is effectively prevented, and when the toluene supply is stopped, the baffle 703 recovers a closing device under the action of the first spring 705, so that the amount of the toluene communicated with the inside of the heating section 1 is reduced, and the data error is reduced;
when gas is combusted in the heating section 1, the heating section 1 is easily damaged due to the action of high temperature and high pressure easily generated at the moment of combustion, so that the solution provided by the invention is as follows: when the internal pressure of the heating section 1 is increased instantly, the plunger 707 in the protection groove 706 is compressed, the plunger 707 compresses the buffer spring 708, the space in the heating section 1 is increased, high-pressure gas is enabled to pressurize the protection groove 706, and damage caused by the instant high pressure in the heating section 1 is prevented, in the process of compressing the plunger 707, the spring seat 709 is enabled to drive the push rod 712 to push the piston 713 to move in the hydraulic cylinder 711, the gas and hydraulic oil in the hydraulic cylinder 711 are compressed, in addition, the sealing plug 715 in the liquid outlet device is pushed open in the compression process, the gas and hydraulic oil are extruded to the other side of the piston 713, so that the buffer effect on the plunger 707 is achieved, after the combustion is completed, the plunger 707 is slowly restored to the original position under the action of the buffer spring 708, in the process of pushing open the sealing plug 715 in the liquid inlet device, so that the gas and hydraulic oil slowly flow to one side of the piston 713, thereby preventing the plunger 707 from rapidly restoring to the original position under the action of the buffer spring 708 to generate an inertia force, which causes falling-off damage between the buffer spring 708 and the plunger 707.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. Chlorination process titanium dioxide oxidation reactor, including heating section (1), reaction section (2) and quench zone (3), its characterized in that: the heating section (1) is integrally divided into a left section, a middle section and a right section which are fixed together through a flange (5) to form a furnace body; a toluene gun connector (7) is arranged in the middle of the left end of the heating section (1), one to four hot oxygen inlet nozzles (4) are arranged on the outer diameter surface of the left end of the heating section (1), the hot oxygen inlet nozzles (4) are distributed on the heating section (1) in an annular array mode by taking the circle center of the heating section (1) as the center, and an included angle of 60-85 degrees is formed between the hot oxygen inlet nozzles (4) and the axial lead of the heating section (1);
the right end of the heating section (1) is communicated with the reaction section (2), the reaction section (2) is composed of an air inlet chamber (10) and feeding rings (11), the air inlet chamber (10) is of a volute annular structure, a plurality of feeding rings (11) are fixed on the inner wall of the air inlet chamber (10), a pipe channel (9) is formed between two adjacent feeding rings (11), a high-temperature-resistant reducing ceramic pipe is fixed on the inner wall of the pipe channel (9), and the reducing ceramic pipe is a ceramic pipe with the diameter gradually reduced from outside to inside;
the air inlet chamber (10) is provided with a titanium tetrachloride air inlet (8), the air inlet chamber (10) is provided with a reaction section air inlet (2 a) and a reaction section air outlet (2 b) along the axial direction of the hot section, the reaction section air inlet (2 a) is communicated and connected with the right end of the heating section (1), the reaction section air outlet (2 b) is communicated and connected with the left end of the quenching section (3), the quenching section (3) is a gas-liquid heat exchanger, and the base material coming out of the reaction section (2) enters the gas-liquid heat exchanger for heat exchange and cooling.
2. The chloride process titanium dioxide oxidation reactor of claim 1, wherein: the number of the pipe channels (9) is four to twelve, the body of the heating section (1) is composed of a shell and a refractory heat-insulating material (6), the material of the shell is nickel-based alloy material, and the inner lining of the refractory heat-insulating material (6) is fixed on the inner wall of the shell.
3. The chloride process titanium dioxide oxidation reactor of claim 1, wherein: hot oxygen inlet pipe mouth (4) and heating section (1) still can be for perpendicular tangential setting, and the inside lining refractory material of hot oxygen inlet pipe mouth (4), oblique cut hole (401) have been seted up to heating section (1) inside lining, and oxygen inlet pipe mouth (4) passageway links to each other with oblique cut hole (401), oblique cut hole (401) and hot oxygen inlet pipe mouth (4) passageway set up through pouring refractory material integrated into one piece, oblique cut (401) are 45 to 75 degrees settings with heating section (1) axial contained angle.
4. The chloride process titanium dioxide oxidation reactor of claim 1, wherein: the inner diameter of a cavity structure in the volute annular structure of the air inlet chamber (10) can be reduced in a spiral mode from large to small, and a shell of the air inlet chamber (10) is made of a nickel-based alloy steel plate; the feeding ring (11) in the air inlet chamber (10) is of a circular ring type solid structure and is made of nickel-based alloy forging materials, 8-16 pipe channels (9) are uniformly distributed on the periphery of the feeding ring (11), the pipe channels (9) are gradually reduced from outside to inside in diameter, and the inside of each pipe channel (9) is tightly lined with a variable-diameter high-temperature-resistant ceramic pipe.
5. The chloride process titanium dioxide oxidation reactor of claim 1, wherein: toluene gun interface (7) one end can also be fixed to cup joint and widen cover (701), widen cover (701) and toluene gun interface (7) and set up for integrated into one piece, toluene gun interface (7) are located and have been widened one section of cover (701) inside and have been seted up and have been widened hole (702), the cross sectional shape that widens hole (702) is the rectangle setting, and interior roof and interior diapire all articulate has baffle (703), baffle (703) surface through connection has arc pole (704), arc pole (704) one end with widen hole (702) inner wall fixed connection, and the surface has cup jointed first spring (705), widen cover (701) and be located heating section (1) inside one end and evenly seted up a plurality of guard slot (706), the inside protector that is provided with of guard slot (706).
6. The chloride process titanium dioxide oxidation reactor of claim 5, wherein: protector includes plunger (707) and buffer spring (708), plunger (707) are accurate cooperation idol piece slip setting with protection groove (706) inner wall, buffer spring (708) both ends all are provided with spring holder (709), and have seted up bleeder vent (710) between protection groove (706) one end and the widening cover (701) outside, one of them spring holder (709) are located bleeder vent (710) position and set up for the through-hole, two be provided with hydraulic buffer between spring holder (709).
7. The chloride process titanium dioxide oxidation reactor of claim 6, wherein: the hydraulic buffer device comprises a hydraulic cylinder (711) and a push rod (712), one end of the push rod (712) is arranged in the hydraulic cylinder (711) in a sliding and inserting mode, a piston (713) is fixedly connected with the hydraulic cylinder, hydraulic oil is arranged in the hydraulic cylinder (711), the volume of the hydraulic oil is smaller than half of the volume of the hydraulic cylinder (711), a plurality of liquid inlet devices and liquid outlet devices are arranged between two sides of the piston (713) in a penetrating mode, and the number of the liquid inlet devices is smaller than that of the liquid outlet devices.
8. The chloride process titanium dioxide oxidation reactor of claim 7, wherein: liquid inlet means all includes worker shape passageway (714) with play liquid device, the inside one end of worker shape passageway (714) is provided with sealing plug (715), sealing plug (715) surface activity through connection has T shape pole (716), second spring (717) have been cup jointed on T shape pole (716) surface, T shape pole (716) one end fixedly connected with filter plate (718), filter plate (718) surface sets up for even poroid, and with worker shape passageway (714) inner wall fixed connection, liquid inlet means sets up for opposite with play liquid device inside sealing plug (715) direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CNPCT/CN2020/086390 | 2020-04-23 | ||
| PCT/CN2020/086390 WO2021212405A1 (en) | 2020-04-23 | 2020-04-23 | Chlorination process-based titanium dioxide oxidation reactor |
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| CN113041986A true CN113041986A (en) | 2021-06-29 |
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| CN115634623A (en) * | 2022-10-24 | 2023-01-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for adding potassium chloride in titanium white production by chlorination process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021212405A1 (en) * | 2020-04-23 | 2021-10-28 | 东华工程科技股份有限公司 | Chlorination process-based titanium dioxide oxidation reactor |
| CN113845145A (en) * | 2021-11-15 | 2021-12-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Scar-proof device of titanium white chloride oxidation reactor and oxidation reactor |
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| CN201264909Y (en) * | 2008-05-28 | 2009-07-01 | 攀枝花钢铁(集团)公司 | Titanic chloride oxidation reactor |
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- 2020-04-23 WO PCT/CN2020/086390 patent/WO2021212405A1/en active Application Filing
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| CN1277941A (en) * | 2000-06-13 | 2000-12-27 | 华东理工大学 | Titanium white chloride oxidation reactor |
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