CN115325816A - High-purity titanium dioxide production equipment and process thereof - Google Patents

Abstract

The invention provides high-purity titanium dioxide production equipment and a process thereof in the technical field of titanium dioxide preparation, and the equipment comprises a rotary kiln assembly, wherein the rotary kiln assembly comprises a dehydration calcination area, a desulfurization calcination area and a transformation calcination area; it is characterized by also comprising: the feeding assembly is used for feeding the hydrated titanium dioxide into the rotary kiln assembly and is arranged at one end of the tail of the rotary kiln assembly; the air exhaust component is used for exhausting dehydrated and desulfurized gas to carry out isolated heat supply on the hydrated titanium dioxide conveyed by the feeding component and is arranged on the rotary kiln component; and the cleaning assembly is arranged in the rotary kiln assembly and is used for rolling titanium dioxide and rotationally separating sintered materials along the rotary conveying direction of the rotary kiln assembly. The invention has the advantages of separating and preheating input materials, quickly removing sintered particles and the like during the calcination of the hydrated titanium dioxide.

Description

A kind of high-purity titanium dioxide production equipment and its process

technical field

The invention relates to the technical field of titanium dioxide preparation, in particular to high-purity titanium dioxide production equipment and a process thereof.

Background technique

When preparing titanium dioxide by the sulfuric acid method, sulfuric acid is used to hydrolyze titanium-containing minerals to obtain a titanyl sulfate solution, which is purified and hydrolyzed to obtain metatitanic acid precipitation, and then roasted in a rotary kiln to produce titanium dioxide pigment products. This is a discontinuous production process with complicated processes. It needs about 20 steps, more wastes are discharged, more operation steps are required for crystal transformation, and the incineration process used consumes a lot of energy. The sulfuric acid process mainly includes the following steps:

1) Impurity removal: FQ6+3H2SCH=Fe2(SO4)3+3H2O, TiO2+2H2SO4=Ti (SO4)2+2HzO;

2) Then: Fe+F& (SO4) 3=3Fe2SO4;

3) Adjust the pH to 5-6 to hydrolyze Ti (SO4)2: Ti (SO4)2+3H2O=H2TiO3J +2H2SO4;

4) Filtrate the precipitate and heat to obtain TiO2: H2TiO3=TQ2+H2OT.

Generally, hydrated titanium dioxide (meta-titanic acid) is a process of removing free water and crystal water between 150 and 300 °C, and a desulfurization process at around 650 °C, and begins to transform from anatase to rutile at 700 to 950 °C. In the presence of a metal catalyst (salt treatment agent), the conversion temperature can be reduced and the conversion rate can be accelerated; during the calcination process, the relative density of titanium dioxide changes with the change of the product structure, from 3.92 at 600 ° C (anatase type) 4.25 to 1000~1200°C rutile type, the conversion temperature of rutile type can be reduced to 850~900°C after adding accelerator.

Chinese patent CN109850941B discloses a method for preparing high-purity titanium dioxide by hydrolysis of industrial titanium sulfate solution, which belongs to the field of chemical technology. The method for preparing high-purity titanium dioxide by hydrolysis of industrial titanium sulfate solution includes: freezing the titanium sulfate solution to precipitate ferrous sulfate crystals, filtering to obtain filtrate A; taking 1 volume of filtrate A and 0.20-1.00 volume of water and preheating to 90-98 ° C; Then add the filtrate A to the water under stirring conditions, reheat to maintain a slight boiling state for 20-40 minutes, stop heating and stirring and aging for 20-40 minutes; reheat and maintain a slight boiling state for 120-240 minutes, cool to 60-70°C, and Filtrate, wash the filtered solid to obtain purified metatitanic acid; raise the temperature of the purified metatitanic acid to 750-850°C at a rate of 10-15°C/min, keep it warm for 100-150min, and cool to obtain high-purity metatitanic acid Titanium dioxide.

However, in this technical solution, although the sulfuric acid method can be used to obtain titanium dioxide, when the obtained metatitanic acid (hydrated titanium dioxide) is calcined in a rotary kiln, the hydrated titanium dioxide input into the kiln is directly pre-calcined due to dehydration and desulfurization gas. Heat treatment makes the hydrated titanium dioxide exposed to the preheating gas aggravate the pollution, thereby reducing the efficiency of dehydration and desulfurization, and when calcined at high temperature, the sintered particles formed are not only inconvenient to separate from the titanium dioxide powder in the kiln, but also exist in the titanium dioxide powder At the same time, it is also easy to affect the calcination uniformity of titanium dioxide due to the inhomogeneity of particle size.

Contents of the invention

The purpose of the present invention is to address the deficiencies of the prior art and provide a high-purity titanium dioxide production equipment. The dehydration and desulfurization gas in the rotary kiln assembly is extracted through the reciprocating action of the air extraction assembly along the upward direction of the air flow, and is isolated and transported to the The feeding component of the conveying material conducts heat evenly along the inner and outer spiral channels to the titanium dioxide being transported for isolation and preheating. The cleaning component performs roll pressing on the continuous high-temperature calcined titanium dioxide after dehydration and desulfurization. The filter element picks up the sintered material and rotates the centrifuge until the sintered material rotates to the center of the vortex and is blown to the exhaust channel to be sent out, so as to realize the isolation and preheating of the input material in the kiln for the hydrated titanium dioxide and the separation and preheating of the sintered material from the kiln and the sintered material during the calcination process. Continuous separation and discharge treatment of titanium dioxide powder.

To achieve the above object, the present invention provides the following technical solutions:

A high-purity titanium dioxide production equipment, including a rotary kiln assembly, the rotary kiln assembly includes a dehydration calcination area, a desulfurization calcination area, and a transformation calcination area; it is characterized in that it also includes: a feeding assembly for sending hydrated titanium dioxide into the The feed assembly of the rotary kiln assembly is arranged at one end of the kiln tail of the rotary kiln assembly; the air extraction assembly is used to extract dehydration and desulfurization gas to isolate and heat the hydrated titanium dioxide transported by the feed assembly The air extraction component is arranged in the rotary kiln component; and the cleaning component is arranged in the rotary kiln component for rolling and compacting titanium dioxide along the rotary conveying direction of the rotary kiln component and for rotating and separating the sintered material The air extraction component is arranged above the dehydration and decalcination area and the desulfurization calcination area in the rotary kiln assembly; the cleaning assembly is located at the end of the desulfurization calcination area of the rotary kiln assembly to the transformation calcination area.

Further, the feeding assembly includes: a shell, the top of the shell is provided with a feed port; a material transfer rotor, which seals and conducts the heat of the dehydrated and desulfurized gas to the feed port of the hydrated titanium dioxide. The swivel is inserted on the housing with the top corresponding to the feed inlet; and a transmission assembly, which is used to drive the feeding swivel to rotate and feed, is installed on the housing.

Further, the conveying swivel includes: a conveying rod, the outer wall of which is provided with an external spiral channel; an air-insulating channel, which is arranged along the circumferential direction of the conveying rod. Annularly opened on one side of the feeding rod; and an exhaust port, which is opened on the feeding rod and arranged on the opposite side of the air isolation channel and the air isolation channel. The passages are connected; the inner wall of the air isolation passage is provided with an inner helical passage corresponding to the outer helical passage.

Further, the air extraction assembly includes: an air extraction pipe, the end of which is linked to the housing and correspondingly communicates with the air isolation channel, and the bottom of the air extraction pipe is uniformly provided with an inlet an air passage; an extracting part, which is used to reciprocally adjust the ventilation volume of the air intake channel to perform an air extraction action, and the extraction part is slidably arranged in the air extraction pipeline; components.

Further, the air extraction pipeline includes: a collection pipeline arranged horizontally; an intermediate pipeline connecting the collection pipeline to the rotation center of the rotary kiln assembly; and a conical arrangement, guiding the gas in the intermediate pipeline to the The guide pipe of the above-mentioned air barrier channel.

Further, the extraction part includes: a drive shaft connected to the power assembly; an air suction assembly mounted on the drive shaft; and a suction assembly installed at the bottom of the air suction assembly and slidingly connected to one side of the air intake The lower baffle; the power assembly makes the drive shaft drive the suction assembly to extract air corresponding to the air inlet, and the power assembly makes the drive shaft move back and forth along the axial direction of the air suction pipe, so that the moving lower baffle changes the air flow of the air inlet .

Further, the cleaning assembly includes: a frame arranged along the axial direction of the rotary kiln assembly, and the two sides of the frame are respectively provided with a gas transmission channel and an exhaust channel; The titanium dioxide in the filter assembly, which rotates to filter out the sintered particles, is installed between the gas delivery channel and the exhaust channel.

Further, the filter assembly includes: a shovel press assembly, the shovel press assembly is arranged in a J shape after shoveling and rolling titanium dioxide for filtration and discharge; a rotating filter assembly is used to rotate and pick up unfiltered materials on the shovel press assembly The rotary filter assembly for separating the sintered particles by rotary sieving is arranged above the shovel press assembly; and the stopper, which is used to block the raised material, is arranged on the top side of the rotary filter assembly ; While the shovel pressing assembly scoops up and rolls the titanium dioxide, it performs preliminary filtration on the sintered particles in the rotating and moving titanium dioxide. The air power is blown into the exhaust channel.

Further, the rotary filter assembly includes: a filter element arranged in a vortex shape; a rotary seat installed on both sides of the filter element and communicated with the air supply channel and the exhaust channel respectively; and driving the rotary seat, A linkage assembly for the rotating action of the filter element; the linkage assembly is driven by a power assembly.

In order to achieve the above object, the present invention also provides a high-purity titanium dioxide production equipment for the process of calcining hydrated titanium dioxide, which is characterized in that it includes the following steps:

Step 1. Isolate the air extraction. When the feeding component feeds the kiln tail of the rotary kiln component, the transmission drive shaft rotates and moves back and forth along the axial direction of the rotary kiln component, so that it is arranged above the dehydration and decalcination area and the desulfurization calcination area. While the air suction component rotates to extract air, adjust the air flow of the intake channel, and reciprocate the adjustment of the extraction intensity from the intake channel to the titanium dioxide;

Step 2. Isolate heat supply and feed materials. The extracted gas enters the gas isolation channel through the air extraction pipe. The hydrated titanium dioxide raw material is fed towards the kiln tail of the rotary kiln assembly through the outer spiral channel, and the extracted gas is evenly isolated and heat-conducted to the other side through the inner spiral channel. Hydrated titanium dioxide raw material being exported;

Step 3, sintering and filtering, the titanium dioxide dehydrated and desulfurized by the rotary kiln assembly reaches the cleaning assembly, the shovel pressing assembly shovels the titanium dioxide along the rotating inner wall of the rotary kiln assembly and rolls it, and the titanium dioxide fine powder is discharged through the shovel pressing assembly and remains in the shovel The sintered particles and a small amount of titanium dioxide fine powder in the pressing assembly are picked up by the rotating filter assembly, and are continuously rotated and separated along the vortex-shaped orbit until the sintered particles rotate to the center of the filter element and are blown out by the air force of the air delivery channel to the exhaust channel.

The beneficial effects of the present invention are:

(1) Through the mutual cooperation between the feeding component and the air extraction component, the present invention can realize the extraction of the calcining heat provided by the kiln head to the feeding component that is feeding, and at the same time realize the isolation and heat conduction of the air flow, In this way, the preheating of the hydrated titanium dioxide transported to the kiln tail is ensured, and at the same time, the pollution caused by the evaporated water and sulfur carried by the airflow and the direct contact with the hydrated titanium dioxide is solved;

(2) The present invention can ensure that the heat is evenly sent to the outer wall of the delivery rod along the inner side of the air separation channel during the process of transporting hydrated titanium dioxide through the design of the double helix channel structure on the outside of the delivery rod and the inside of the air isolation channel. Thus ensuring the heating uniformity of hydrated titanium dioxide;

(3) Through the cooperative design between the air extraction pipe and the extraction part, the present invention can change the flow of the air intake channel reciprocatingly, so as to realize the rapid extraction of evaporated gas along the direction of the rising height of the air flow;

(4) Through the mutual cooperation between the air extraction component and the cleaning component, the present invention can realize the rotary filtration and removal of the sintered particles when the titanium dioxide after dehydration and desulfurization is continuously transformed into the rutile type , so as to solve the problem of cleaning the sintered particles when the titanium dioxide is calcined, and also solve the technical problem that the heating uniformity of the titanium dioxide powder is affected by the existence of the sintered particles in the titanium dioxide powder;

(5) Through the mutual cooperation between the shovel pressure assembly and the rotary filter assembly and the vortex-shaped filtration design of the rotary filter assembly, the present invention can not only scoop out the sintered particles and filter them, but also pick up the sintered material that has been initially filtered. The method of rotary filtration quickly removes the titanium dioxide adsorbed on the surface of the sintered particles, and simultaneously completes the continuous discharge of the cleaned sintered particles;

To sum up, the present invention has the advantages of isolating and preheating input materials during calcination of hydrated titanium dioxide, and quickly removing sintered particles.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is the sectional view of Fig. 1 of the present invention;

Fig. 3 is a schematic diagram of the internal structure of the rotary kiln assembly of the present invention;

Fig. 4 is the structural representation of cleaning assembly of the present invention;

Fig. 5 is the sectional view of Fig. 4 of the present invention;

Figure 6 is a cross-sectional view of the filter assembly of the present invention;

Fig. 7 is a partial structural schematic diagram of the linkage assembly of the present invention;

Fig. 8 is a schematic structural view of the air extraction assembly of the present invention;

Fig. 9 is an enlarged view of place A in Fig. 8 of the present invention;

Fig. 10 is a schematic view of the structure of the bottom side of the air extraction pipeline of the present invention;

Fig. 11 is the structural representation of the end section of the air extraction pipeline of the present invention;

Fig. 12 is a schematic structural view of the feeding assembly of the present invention;

Figure 13 is a sectional view of Figure 12 of the present invention;

Fig. 14 is an enlarged view of place B in Fig. 13 of the present invention;

Fig. 15 is a flow chart of the production process of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

Embodiment one

As shown in Figure 1, a high-purity titanium dioxide production equipment includes a rotary kiln assembly 1, which includes a dehydration calcination area, a desulfurization calcination area, and a transformation calcination area; it also includes: a feed assembly 2 for The feed assembly 2 that hydrated titanium dioxide is sent into the rotary kiln assembly 1 is arranged at one end of the kiln tail of the rotary kiln assembly 1; the air extraction assembly 3 is used to extract dehydration and desulfurization gas to the feed assembly 3 The air extraction component 2 for the isolated heat supply of the transported hydrated titanium dioxide is arranged on the rotary kiln component 1; and the cleaning component 4 is used to roll and compact the titanium dioxide along the rotary conveying direction of the rotary kiln component 1 and rotate the sintered material The separated cleaning assembly 4 is arranged in the rotary kiln assembly 1; the air extraction assembly 3 is arranged above the dehydration and decalcination area and the desulfurization calcination area in the rotary kiln assembly 1; the cleaning assembly 4 is arranged in the The end of the desulfurization calcination area of the rotary kiln assembly 1 is to the transformation calcination area.

From the above, it can be seen that in the process of titanium dioxide processing and production, after the hydrated titanium dioxide is obtained by the sulfuric acid method, it needs to be calcined to complete the removal of free water and crystal water, desulfurization and the conversion of anatase to rutile The conversion of the rotary kiln assembly 1 in the present invention is preferably a rotary kiln in the prior art, that is, by setting the calcination temperature from the kiln tail to the kiln head, there are 150-300 ° C for ① removing free water and crystal water ② desulfurization process ③ 700-950°C during the transformation process from anatase to rutile; Specifically, during the calcination process, the hydrated titanium dioxide is added from the kiln tail of the rotary kiln assembly 1 by using the feeding assembly 2 to continuously transport, and after adding When hydrating titanium dioxide, in order to improve the efficiency of heat utilization, by extracting the evaporated gas after dehydration and desulfurization and calcination, and sending it to the feeding assembly 2 in an isolated state, the hydrated titanium dioxide being input into the rotary kiln 1 is subjected to isolation preheating treatment , so as to realize the removal of water and sulfur by evaporation, and at the same time, it also solves the pollution of input titanium dioxide caused by directly preheating the input hydrated titanium dioxide due to the water and sulfur in the unenclosed state; and in titanium dioxide When calcination realizes the transformation from anatase to rutile, due to the influence of calcination temperature and other factors, it is easy to cause sintering during calcination, and the sintered particles are not only difficult to be directly removed from the rotary kiln component 1, but also easily affect the surrounding environment. Heating uniformity during calcination of titanium dioxide, therefore, by using the cleaning component 4 during the calcination process at 700-950°C, the sintered titanium dioxide can be rolled apart by preliminary rolling of the titanium dioxide, thereby releasing the unsintered titanium dioxide powder , and the preliminary rolled titanium dioxide is separated by rotary filtration, and the filtered titanium dioxide powder is output to the kiln head through the cleaning component 4.

What needs to be added is that, as shown in Figure 1, the rotary kiln assembly 1 includes a kiln 11 with the kiln head at a low position and the kiln tail at a high position, a kiln base 12 arranged below the kiln 11, installed on the The driving assembly 13 on the kiln base 12 and used to drive the rotation of the kiln 11 and the burner 14 arranged at the kiln head, the driving assembly 13 and the burner 14 are existing technologies in the field of rotary kiln There are technologies, so I won’t repeat them here.

As shown in Figure 12, the feeding assembly 2 includes: a housing 21, the top of the housing 21 is provided with a feed inlet 211; a conveying swivel 22, which seals and conducts the heat of the dehydrated and desulfurized gas to the feed inlet 211 The input rotating body 22 of hydrated titanium dioxide is inserted on the housing 21 and the top corresponds to the feed port 211; and a transmission assembly 23 is used to drive the rotating body 22 to rotate The transmission assembly 23 of the material is installed on the housing 21.

In this embodiment, during the feeding process of the feed assembly 2 to the kiln tail of the rotary kiln assembly 1, hydrated titanium dioxide is added to the feed inlet 211 above the shell 21, and then driven by the drive assembly 23, so that Realize the rotation of the feeding rotor 22, so as to realize the continuous addition of the hydrated titanium dioxide material to the rotary kiln component 1. At the same time, in order to realize the preheating treatment of the hydrated titanium dioxide, the heat after dehydration and desulfurization is extracted through the air extraction component 3 The gas flow is closed and preheated to avoid pollution of the hydrated titanium dioxide that is desorbed from the water and sulfur.

It should be noted that, in order to ensure sufficient discharge of the dehydrated gas in the hydrated titanium dioxide, the suction end of the suction component 3 extends to the discharge position of the feeding component 2 .

As shown in Figures 12 and 13, the feeding swivel 22 includes: a feeding rod 221, the outer wall of the feeding rod 221 is provided with an outer spiral channel 2211; an air isolation channel 222, and the air isolation channel 222 Annularly opened on one side of the feeding rod 221 along the circumferential direction of the feeding rod 221; and an exhaust port 223, opened on the feeding rod 221 and arranged in the air isolation channel The exhaust port 223 on the opposite side of 222 communicates with the air isolation channel 222 ; the inner wall of the air isolation channel 222 is provided with an inner spiral channel 2221 corresponding to the outer spiral channel 2211 .

In this embodiment, during the process of feeding and preheating the hydrated titanium dioxide, the conveying swivel 22 draws gas into the gas isolation channel 222 through the air pumping assembly 3, and discharges the gas from the rotary kiln assembly 1 through the exhaust port 223. , and when the gas passes through the gas isolation channel 222, it will pass through the inner spiral channel 2221 arranged correspondingly to the outer spiral channel 2211 for material delivery, which can realize the short stay heat conduction of the hot air flow on the inner wall of the gas isolation channel 222, and can also The uniformity of the distance between the inner wall of the air isolation channel 222 and the outer wall of the feeding rod 221 is realized, thereby ensuring the uniformity of the heat conduction to the outside of the feeding rod 221 and acting on the hydrated titanium dioxide.

It is worth noting that, as shown in FIGS. 12 and 13 , the transmission assembly 23 includes a first transmission gear 231 mounted on the feeding rod 221 , a second transmission gear 231 meshed with the first transmission gear 231 . The gear 232 and the transmission motor 233 installed on the casing 21 and whose power end is connected to the second transmission gear 232, the transmission motor 233 is preferably a servo motor, and the exhaust port 223 passes through the second transmission gear 232 A transmission gear 231 .

As shown in Figures 8 and 10, the air extraction assembly 3 includes: an air extraction pipe 31, the end of which is linked to the housing 21 and communicates with the air isolation channel 222 correspondingly, so The bottom of the air extraction duct 31 is uniformly provided with an air intake duct 311; an extraction part 32, which is used to reciprocate and adjust the ventilation volume of the air intake duct 311 to perform an air extraction action, is slidably arranged on the air extraction duct 31 inside; and a power assembly 33 that is drivingly connected to the extraction portion 32 and the transmission assembly 23 .

In this embodiment, when the air extraction assembly 3 is performing an air extraction action, the extraction part 32 continuously extracts the gas below the air intake duct 311 at each position, and at the same time changes the gas flux of the air intake duct 311 to extract power. Under the same conditions, it is possible to realize the gas extraction action at different heights below the inlet duct 311 , and realize the efficient discharge of gas at various heights below the inlet duct 311 .

As shown in Figure 12, the air extraction pipeline 31 includes: a collection pipeline 311 arranged horizontally; an intermediate pipeline 312 connecting the collection pipeline 311 to the center of rotation of the rotary kiln assembly 1; The gas in the middle pipe 312 is guided to the guide pipe 313 of the gas isolation channel 222 .

In this embodiment, in order to ensure the corresponding and uniform delivery of the gas extracted through the suction pipe 31 to the gas isolation channel 222, the collected gas from the collection pipe 311 that deviates from the center of the gas isolation channel 222 is introduced into the gas isolation channel 222 by using the guide tube 313 Center, and evenly distributed to the isolation channel 222, thus ensuring the heating uniformity of the hydrated titanium dioxide during preheating.

As shown in Figures 10 and 11, the extraction part 32 includes: a drive shaft 321 connected to the power assembly 33; an air suction assembly 322 mounted on the drive shaft 321; And the lower baffle plate 323 that is slidingly connected to one side of the air inlet 311; the power assembly 33 makes the drive shaft 321 drive the air suction assembly 322 to extract air corresponding to the air inlet 311, and the power assembly 33 makes the drive shaft 321 draw air along the The pipe 31 moves back and forth in the axial direction, so that the moving lower baffle 323 changes the air flow of the air inlet 311 .

In this embodiment, during the extraction process, the extraction part 32 can drive the suction assembly 322 to work through the rotation of the drive shaft 321, so that the suction assembly 322 can generate suction for each air inlet 311, and through the rotation of the drive shaft 321 The movement drives the movement of the suction assembly 322 and the lower baffle 323 , so that the lower baffle 323 can adjust the shielding amount of the air inlet 311 , thereby adjusting the intake flux of the air inlet 311 .

As shown in FIG. 11 , the suction assembly 322 includes a sliding seat 3221 slidably arranged in the collection pipe 311 , an impeller 3222 rotatably installed in the sliding seat 3221 and circumferentially installed on the driving seat 321 .

In this embodiment, the impeller 3222 is a fan impeller that provides suction power, and will not be described in detail here.

As shown in FIG. 13 , the power assembly 33 includes a first power assembly 331 for rotating the drive shaft 321 and a second power assembly 332 for moving the drive shaft 321 back and forth along its axial direction.

As shown in FIG. 14 , the first power assembly 331 includes a first tape reel 3311 that is slidably connected to the drive shaft 321 and is disposed in the intermediate pipe 312 , and the first tape reel 3311 is installed in the intermediate pipe. 312, the first reel seat 3312 on the inner wall, the power rod 3315 located below the first tape reel 3311 and connected to the feeding rod 321, the second tape reel 3316 installed on the power rod 3315 , the first power belt 3314 that connects the first belt reel 3311 to the second belt reel 3316 and the splines that are axially arranged on the drive shaft 321 and slide through both sides of the first belt reel 3311 3313.

In this embodiment, when the feeding rod 221 rotates, the second belt reel 3316 is driven to rotate, thereby transmitting to the first belt reel 3311 through the first power belt 3314, and then driving the drive shaft 321 connected by the spline 3313 to rotate, Thus, the air suction component 322 is driven to perform air suction.

As shown in FIGS. 9 and 12 , the second power assembly 332 includes a guide 3322 mounted on the end of the drive shaft 321 , a guide track 3322 set on the guide 3322 and arranged in a symmetrical S shape, and The guide piece 3323 is connected with the guide pipe 313 and slidably inserted in the guide track 3322 .

In this embodiment, when the drive shaft 321 rotates, it will drive the guide member 3322 to rotate, so that the guide member 3323 moves in the guide track 3322 , so that the guide member 3323 drives the drive shaft 321 to move back and forth along the axial direction of the drive shaft 321 .

Embodiment two

As shown in FIG. 4 , the parts that are the same as or corresponding to those in Embodiment 1 use the corresponding reference numerals as in Embodiment 1. For the sake of brevity, only the differences from Embodiment 1 will be described below. The difference between this embodiment two and embodiment one is:

The cleaning assembly 4 includes: a frame 41 arranged along the axial direction of the rotary kiln assembly 1, the two sides of the frame 41 are respectively provided with a gas delivery channel 411 and an exhaust channel 412; a filter assembly 42, scooped up The filter assembly 42 for rotating and filtering out the sintered particles during the rolling and calcining process of titanium dioxide is installed between the gas delivery channel 411 and the exhaust channel 412 .

In this embodiment, when the cleaning component 4 processes the sintered particles during the calcination process in the kiln, the air force is input through the air delivery channel 411 (it should be noted that in order to ensure the atmosphere in the furnace, the input gas is an inert gas), Furthermore, after the filter assembly 42 filters out the sintered particles, the sintered particles will move to the center of rotation of the filter assembly 42, so that the air delivery channel 411 blows the sintered particles out into the exhaust channel 412 arranged obliquely along the center of rotation, and then along the Then the exhaust passage 412 slides out of the kiln head located in the rotary kiln assembly 1 to discharge.

As shown in Figure 4, the filter assembly 42 includes: a shovel press assembly 421, the shovel press assembly 421 is arranged in a J shape after shoveling and rolling titanium dioxide for filtration and discharge; a rotating filter assembly 422 is used to pick up the shovel The rotary filter assembly 422 for rotating the unfiltered material on the pressing assembly 421 to separate the sintered particles is arranged above the shovel pressing assembly 421; 423 is located on the top side of the rotary filter assembly 422; while the shovel press assembly 421 scoops up and rolls the titanium dioxide, it performs preliminary filtration on the sintered particles in the rotating titanium dioxide, and the rotary filter assembly 422 picks up the sintered and rotates to separate the separated particles. The titanium dioxide falls to the shovel pressing assembly 421, and the sintered particles are blown into the exhaust channel 412 through the gas transmission power of the gas transmission channel 411.

In this embodiment, when filtering the sintered particles, the filter assembly 42 uses the shovel pressing assembly 421 to shovel and filter the titanium dioxide powder moving along the conveying direction of the rotary kiln. The titanium dioxide powder can also carry out preliminary rolling treatment on the sintered particles through the shovel pressing assembly 421, and then filter, and when the titanium dioxide powder moves toward the side of the kiln head, it will gradually enter the J-shaped shovel pressing assembly 421, after The sintered particles and the accompanying titanium dioxide powder left by the filtration will be picked up by the rotating filter assembly 422, and will be continuously transferred towards the center of rotation while undergoing centrifugal filtration. The high-efficiency removal of the titanium dioxide powder, and at the same time facilitate the rapid export and discharge of the separated sintered particles; and in order to ensure the powder flying during the filtration process, the stopper 423 set above the rotary filter assembly 422 can play a very good blocking role .

As shown in Figures 5 and 6, the shovel pressing assembly 421 includes a J-shaped bracket 4211 installed on the frame 41, a J-shaped filter screen 4212 installed on the J-shaped bracket 4211, and a J-shaped filter screen 4212 installed on the J-shaped bracket 4211. The pressure roller 4213 above the shape filter screen 4212 and connected to the frame 41, the scraper 4216 arranged on one side of the pressure roller 4213, the fifth tape reel 4214 installed on the pressure roller 4213, the fifth tape reel 4214 installed on the The sixth reel on the rotary filter assembly 422 and the transmission belt 4215 connecting the fifth reel 4214 and the sixth reel; the front section of the J-shaped bracket 4211 is provided with a chamfered shovel head.

In this embodiment, when the rotary filter assembly 422 rotates, the fifth tape reel 4214 is driven to rotate through the sixth tape reel, so that the pressure roller 4213 rolls and crushes the sintered particles with larger particles, and the rotation is realized by the scraper 4212 During the process, the surface of the pressure roller 4213 is cleaned.

It is worth noting that when the rotating filter assembly 422 drives the pressure roller 4213 to rotate, the pressure roller 4213 can also be rotated in the opposite direction by adjusting the structural design, so that the pressure roller 4213 rotates and rolls the sintered particles, so that the sintered particles can pass through the pressure roller quickly. The method at the bottom of the roller 4213 can also realize the present invention. Specifically, the rotating power of the rotating filter assembly 422 can be transmitted to a set of intermediate gears, and then the intermediate gears can be coaxially connected with the fifth belt reel 4214. Rotating rolling can reduce the amount of unrolled sintered particles, and the latter can increase the passing efficiency of sintered particles by reverse rotating rolling, which will not be repeated here.

As shown in Figure 6, the rotary filter assembly 422 includes: a filter element 4221 arranged in a vortex shape; a rotating seat installed on both sides of the filter element 4221 and communicated with the air delivery channel 411 and the exhaust channel 412 respectively 4222 ; and a linkage assembly 4223 that drives the rotary seat 4222 and the filter element 4221 to rotate; the linkage assembly 4223 is driven by the power assembly 33 .

In this embodiment, the power assembly 33 transmits power to the filter element 4221 through the linkage assembly 4223 to rotate, so that the filter element 4221 continuously filters out sintered particles along the vortex-shaped filtering track to the vortex-shaped center, and passes through the air delivery channel 411 The sintered particles are blown out.

It is worth noting that during the rotation and filtration of the filter element 4221, its maximum outer diameter will continuously rotate along the arc-shaped arrangement surface of the J-shaped filter screen 4212 during the rotation process, so that when the inner wall of the J-shaped filter screen 4212 collects When the filtered sintered particles and titanium dioxide powder are obtained, the filter member 4221 can be rotated and scooped into the sintered particles and titanium dioxide powder to carry out the purpose of rotating and filtering along the vortex track.

As shown in Figures 5 and 7, the linkage assembly 4223 includes a fixed base 42232 sequentially installed on the frame 41, a rotating shaft 42231 that moves through the fixed base 42232, and is installed on the rotating shaft 42231 And the first helical gear 42233 connected with the rotating base 4222, the seventh gear 42234 installed on the rotating shaft 42231, installed on the frame 1 and arranged between two adjacent groups of seventh gears 42234 between the transmission seat 42235, the transmission shaft 42236 that moves through the transmission seat 42235, and the eighth gear 42237 that is installed at both ends of the transmission shaft 42236 and is in transmission engagement with the adjacent two sets of seventh gears 42234. A second helical gear in drive engagement with the first helical gear 42233 is disposed on one side of the rotating base 4222 .

In this embodiment, when the transmission assembly 33 transmits the rotation of the rotating shaft 42231 correspondingly connected to it, the first helical gear 42233 drives the second helical gear to rotate, and at the same time, the filter element 4221 rotates to filter out sintered particles, and the rotating The rotating shaft 42231 will also pass through the transmission connection between the seventh gear 42234 and the eighth gear 42237, thereby sequentially driving each group of filter elements 4221 arranged along the direction of the frame 41 to rotate and filter the sintered particles, so as to realize the process of calcination along the titanium dioxide Filtration of sintered particles is carried out in the output direction.

As shown in FIGS. 9 and 14 , the power assembly 33 also includes a third power assembly 333 for driving the linkage assembly 4223 , and the third power assembly 333 includes a drive shaft 321 mounted on the outer part of the intermediate pipe 312 . The ninth transmission gear 3332 on the guide pipe 313, the gear bracket 3331 installed on the outside of the guide pipe 313, the tenth transmission gear 3333 installed on the gear bracket 3331 and meshed with the ninth transmission gear 3332, and the tenth transmission gear 3333 The eleventh belt reel 3334 coaxially installed by the transmission gear 3333, the twelfth belt reel 3335 arranged below the eleventh belt reel 3334 and installed on the rotating shaft 42231, and the eleventh belt reel 3335 3334 and the power transmission belt 3336 that is transmission-connected to the twelfth reel 3335 and the support rod 3337 that is installed on the outer wall of the guide pipe 313 and is movably connected with the end of the rotation shaft 42231 .

In this embodiment, when the drive shaft 321 rotates, it will drive the ninth transmission gear 3332 to rotate, and then transmit it to the tenth transmission gear 3333, and at the same time drive the rotation shaft 42231 to rotate through belt and wheel transmission, thereby driving the filter element 4221 to rotate filter.

Embodiment three

As shown in Figure 15, a high-purity titanium dioxide production process includes the following steps:

Step 1. Isolate air extraction. When the feeding assembly 2 feeds the kiln tail of the rotary kiln assembly 1, the transmission drive shaft 321 rotates while moving back and forth along the axial direction of the rotary kiln assembly 1, so that it is arranged in the dehydration and decalcination area, While the suction assembly 322 above the desulfurization and calcination area rotates and pumps air, it adjusts the ventilation volume of the intake channel 311, and reciprocally adjusts the suction intensity from the intake channel 311 to the titanium dioxide;

Step 2: Isolate heat supply and feeding, the extracted gas enters the gas isolation channel 222 through the air extraction pipe 31, the hydrated titanium dioxide raw material is fed towards the kiln tail of the rotary kiln component 1 through the outer spiral channel 2211, and the extracted gas is uniformly isolated through the inner spiral channel 2221 Heat conduction to the output hydrated titanium dioxide raw material on the other side;

Step 3: Sintering and filtering, the titanium dioxide dehydrated and desulfurized by the rotary kiln component 1 reaches the cleaning component 4, the shovel pressing component 421 scoops up the titanium dioxide along the rotating inner wall of the rotary kiln component 1 and rolls it, and the titanium dioxide fine powder passes through the shovel pressing component 421 The sintered particles and a small amount of titanium dioxide fine powder left in the shovel pressing assembly 421 are picked up by the rotating filter assembly 422, and are continuously rotated and separated along the vortex track until the sintered particles rotate to the center of the filter element 4221 and are compressed by the gas transmission channel 411. The effect is blown out to the exhaust channel 412 for discharge.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. A high-purity titanium dioxide production equipment, comprising a rotary kiln assembly, said rotary kiln assembly including a dehydration calcination area, a desulfurization calcination area and a transformation calcination area; It is characterized in that it also includes: A feed assembly, the feed assembly for feeding hydrated titanium dioxide into the rotary kiln assembly is arranged at the kiln tail end of the rotary kiln assembly; An air extraction component, which is used to extract dehydration and desulfurization gas to isolate and heat the hydrated titanium dioxide transported by the feeding component, is arranged in the rotary kiln component; and A cleaning assembly, the cleaning assembly for rolling and compacting titanium dioxide and rotating and separating the sintered material along the rotary conveying direction of the rotary kiln assembly is arranged in the rotary kiln assembly; The air extraction component is arranged above the dehydration and decalcination area and the desulfurization and calcination area in the rotary kiln assembly; The cleaning component is arranged at the end of the desulfurization calcination area to the transition calcination area of the rotary kiln component. 2. a kind of high-purity titanium dioxide production equipment according to claim 1, is characterized in that, The feed assembly includes: A housing, the top of which is provided with a feeding port; The feeding swivel, which conducts the dehydration and desulfurization gas heat sealing to the hydrated titanium dioxide input from the feed port, is inserted on the shell and the top corresponds to the feed port; and The transmission assembly, which is used to drive the material delivery rotary to rotate the material, is installed on the housing. 3. a kind of high-purity titanium dioxide production equipment according to claim 2, is characterized in that, The transfer body includes: A feeding rod, the outer wall of the feeding rod is provided with an outer spiral channel; An air-isolation channel, the air-isolation channel is annularly opened on one side of the material delivery rod along the circumferential direction of the material delivery rod; and The exhaust port, which is opened on the feeding rod and arranged on the opposite side of the air isolation channel, communicates with the air isolation channel; An inner helical channel corresponding to the outer helical channel is defined on the inner wall of the air isolation channel. 4. a kind of high-purity titanium dioxide production equipment according to claim 3, is characterized in that, The air extraction components include: An air extraction pipe, the end of which is linked to the housing is in communication with the air isolation channel, and the bottom of the air extraction pipe is uniformly provided with an air inlet; an extracting part, which is used to reciprocally adjust the air flow of the intake channel to perform an air extraction action, and is slidably arranged in the air extraction pipe; and A power assembly for drivingly connecting the extracting part with the transmission assembly. 5. a kind of high-purity titanium dioxide production equipment according to claim 4, is characterized in that, The air extraction pipeline includes: Horizontally arranged collection pipes; connecting the collection conduit to an intermediate conduit leading to the center of rotation of the rotary kiln assembly; and A guide pipe arranged in a tapered shape to guide the gas in the middle pipe to the gas isolation channel. 6. A kind of high-purity titanium dioxide production equipment according to claim 4, is characterized in that, The extractor includes: drive shaft connected to the power pack; a suction assembly mounted on said drive shaft; and a lower baffle mounted on the bottom of the suction assembly and slidingly connected to one side of the air intake; The power component drives the drive shaft to drive the suction component to extract air corresponding to the air inlet, and the power component makes the drive shaft move back and forth along the axial direction of the air suction pipe, so that the moving lower baffle changes the air flow of the air intake. 7. according to the arbitrary described a kind of high-purity titanium dioxide production equipment of claim 1-6, it is characterized in that, The cleaning components include: A frame arranged along the axial direction of the rotary kiln assembly, the two sides of the frame are respectively provided with a gas transmission channel and an exhaust channel; The filter assembly, which scoops up the titanium dioxide during the calcination process and rotates to filter out the sintered particles, is installed between the gas delivery channel and the exhaust channel. 8. A kind of high-purity titanium dioxide production equipment according to claim 7, is characterized in that, The filter assembly includes: The shovel pressing assembly, the shovel pressing assembly that scoops up and rolls the titanium dioxide and then filters and discharges it is arranged in a J shape; A rotary filter assembly, the rotary filter assembly that picks up the unfiltered material on the shovel pressing assembly and performs rotary sieving to separate the sintered particles is arranged above the shovel pressing assembly; and A baffle, the baffle for blocking the raised material is provided on the top side of the rotary filter assembly; While the shovel press assembly scoops up and rolls the titanium dioxide, it preliminarily filters the sintered particles in the rotating and moving titanium dioxide. Pneumatic force blows into the exhaust channel. 9. A kind of high-purity titanium dioxide production equipment according to claim 8, is characterized in that, The rotary filter assembly includes: Swirly arranged filter elements; A rotating seat installed on both sides of the filter element and connected to the gas delivery channel and the exhaust channel respectively; and A linkage assembly that drives the rotation of the rotating seat and the filter element; The linkage assembly is driven by a power assembly. 10. A kind of high-purity titanium dioxide production equipment according to claim 9 is used for the technique of calcining hydrated titanium dioxide, is characterized in that, comprises the following steps: Step 1. Isolate the air extraction. When the feeding component feeds the kiln tail of the rotary kiln component, the transmission drive shaft rotates and moves back and forth along the axial direction of the rotary kiln component, so that it is arranged above the dehydration and decalcination area and the desulfurization calcination area. While the air suction component rotates to extract air, adjust the air flow of the intake channel, and reciprocate the adjustment of the extraction intensity from the intake channel to the titanium dioxide; Step 2. Isolate heat supply and feed materials. The extracted gas enters the gas isolation channel through the air extraction pipe. The hydrated titanium dioxide raw material is fed towards the kiln tail of the rotary kiln assembly through the outer spiral channel, and the extracted gas is evenly isolated and heat-conducted to the other side through the inner spiral channel. Hydrated titanium dioxide raw material being exported; Step 3, sintering and filtering, the titanium dioxide dehydrated and desulfurized by the rotary kiln assembly reaches the cleaning assembly, the shovel pressing assembly shovels the titanium dioxide along the rotating inner wall of the rotary kiln assembly and rolls it, and the titanium dioxide fine powder is discharged through the shovel pressing assembly and remains in the shovel The sintered particles and a small amount of titanium dioxide fine powder in the pressing assembly are picked up by the rotating filter assembly, and are continuously rotated and separated along the vortex-shaped orbit until the sintered particles rotate to the center of the filter element and are blown out by the air force of the air delivery channel to the exhaust channel.

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