A high-quality iron oxide pigment preparation granulation device

Abstract

The application relates to the field of particle pigment preparation equipment, in particular to high-quality iron oxide pigment preparation granulating equipment, which comprises a granulating tower, a cloth bag dust removal tower, a vacuum pumping device, a material spraying device, a blowing device, a power device and a screening device; the inside of the granulating tower is provided with rotating main blowing rods and auxiliary blowing rods; the main blowing rods continuously blow towards the inner wall of the granulating tower; meanwhile, a control assembly can make the main blowing rods and the auxiliary blowing rods alternately blow air to an atomization area and a granulating area; the main blowing rods blowing air to the atomization area can make atomized raw materials gather in the middle, thereby reducing the adhesion of the atomized raw materials on the inner wall of the granulating tower; the auxiliary blowing rods blowing air to the granulating area can make the formed pigment particles disperse in the granulating area, thereby preventing the formed pigment particles from agglomerating and improving product quality, and meeting the existing iron oxide pigment production demand.

Description

Technical Field

[0001] This invention relates to the field of pigment particle production equipment, and in particular to a high-quality iron oxide pigment preparation and granulation equipment. Background Technology

[0002] Iron oxide pigments are pigments with good dispersibility, excellent lightfastness, and weather resistance. Iron oxide pigments mainly refer to four categories of coloring pigments based on iron oxides: iron oxide red, iron oxide yellow, iron oxide black, and iron oxide brown, with iron oxide red being the most common. Mica iron oxide, used as an anti-rust pigment, and magnetic iron oxide, used as a magnetic recording material, also fall under the category of iron oxide pigments. Iron oxide is the second largest inorganic pigment after titanium dioxide, and the largest colored inorganic pigment overall. Of all consumed iron oxide pigments, over 70% are prepared through chemical synthesis, and are called synthetic iron oxide. Synthetic iron oxide is widely used in building materials, coatings, plastics, electronics, tobacco, pharmaceuticals, rubber, ceramics, inks, magnetic materials, and papermaking due to its high purity, uniform particle size, broad color spectrum, diverse colors, low cost, non-toxicity, excellent coloring and application properties, and ultraviolet absorption properties. However, in the current granulation equipment, when the raw material is atomized and enters the granulation tower, it is easy to adhere to the inner wall of the granulation tower, and the formed iron oxide pigment particles are not easy to disperse. The above two reasons will affect and thus affect the granulation efficiency.

[0003] Chinese patent application CN2023104130253 discloses a spray dryer and its air-sweeping device. The air-sweeping rod is fitted with a water-blocking sleeve in the discharge section of the drying tower. The downward-extending end of the air-sweeping rod, after passing through a sealing structure, is connected to a high-pressure blower. An interface is provided on the side of the extended end. An air-sealing inlet is opened on the side of the sealing structure. The interface and the air-sealing inlet are connected through a pipeline. The top of the sealing structure is connected to the lower opening of the first baffle sleeve. The rolling structure includes a fixed shaft, bearings, and a roller assembly. An air passage is opened inside the fixed shaft. There is an installation gap between the fixed shaft and the roller assembly. The installation gap is connected to the interior of the air-sweeping rod through the air passage. The spray dryer of this invention includes an air-sweeping device. The air-sweeping rod of this invention introduces airflow between the water-blocking sleeve and the air-sweeping rod, preventing fine powder from entering the gap and the transmission box in the drying tower. By setting an air passage, the internal space of the air-sweeping rod is connected to the installation gap of the roller assembly, preventing fine powder from entering the installation gap and jamming the roller assembly.

[0004] However, this equipment can only purge and clean the inner wall of the granulation tower and does not have the function of dispersing the formed particles, so it cannot meet the current production requirements. Summary of the Invention

[0005] To address the above problems, this invention provides a high-quality iron oxide pigment preparation and granulation equipment. By installing rotating main and auxiliary blow rods inside the granulation tower, the main blow rod continuously blows air onto the inner wall of the granulation tower. Simultaneously, a control component allows the main and auxiliary blow rods to alternately blow air into the atomization zone and the granulation zone. The main blow rod blowing air into the atomization zone causes the atomized raw material to converge towards the center, thus reducing adhesion of the atomized raw material to the inner wall of the granulation tower. The auxiliary blow rod blowing air into the granulation zone disperses the formed pigment particles within the granulation zone, preventing agglomeration and improving product quality, thus meeting the current requirements for iron oxide pigment production.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A high-quality iron oxide pigment preparation and granulation device, comprising: The granulation tower is internally heated and includes, from top to bottom, an atomization zone, a granulation zone, and a discharge section. A discharge port is provided on one side of the discharge section. A bag filter tower, which is connected to the top of the granulation tower, is used to collect dust inside the granulation tower; A vacuum pumping device is connected to the top of the granulation tower and is used to extract air from the granulation tower. A spraying device is connected to the top of the granulation tower. The spraying device sprays atomized pigment raw materials into the atomization zone. The pigment raw materials move into the granulation zone and are heated and dehydrated to form hollow pigment particles. A purging device includes a vertically arranged air inlet rod, several sets of main purging rods extending from top to bottom along the inner wall of the granulation tower and communicating with the air inlet rod and arranged in a circumferential array inside the granulation tower, auxiliary purging rods communicating with the main purging rods and extending into the granulation zone, a control component correspondingly arranged in the main purging rods and the auxiliary purging rods and controlling them to alternately blow air onto the atomization zone and the auxiliary purging rods, a support component correspondingly arranged at the top of the main purging rods and contacting the inner wall of the granulation tower, and a blowing component communicating with the bottom of the air inlet rods through a rotary air connector. The main purging rods blow air toward the inner wall of the granulation tower and the atomization zone, and the auxiliary purging rods blow air toward the interior of the granulation zone. The system includes a power unit located at the bottom of the discharge section and driving the air intake rod to rotate. The main purging rod continuously purges the inner wall of the granulation tower.

[0007] As an improvement, the control assembly includes a sealing mechanism a rotatably disposed within the main purge bar and extending upward through the main purge bar; a sealing mechanism b disposed within the auxiliary purge bar and linked to the sealing mechanism a via a bevel gear transmission unit; a drive mechanism disposed at the top of the sealing mechanism a and driving the sealing mechanism a to rotate; an air seal unit a disposed at the point where the sealing mechanism a and the main purge bar pass through; and a self-cleaning mechanism disposed above the drive mechanism and communicating with the air seal unit a.

[0008] As an improvement, both the sealing mechanism a and the sealing mechanism b include a rotating shaft installed inside the bushing and rotatably disposed thereon, and an adhesive layer covering the outside of the rotating shaft and capable of sealing the air outlet. In the sealing mechanism a, the rotating shaft is eccentrically disposed inside the main purge rod and the corresponding adhesive layer has a four-lobed cross section; in the sealing mechanism b, the rotating shaft is coaxially disposed inside the auxiliary purge rod and the corresponding adhesive layer has a two-lobed cross section.

[0009] As an improvement, the drive mechanism includes a mounting ring surrounding the top of the granulation tower, a gear ring disposed on the mounting ring, and a gear mounted above the rotating shaft corresponding to the sealing mechanism a and meshing with the gear ring.

[0010] As an improvement, the gas sealing unit a includes a sealing ring at the connection between the main purge rod and the bushing, an oil seal a disposed inside the bushing and rotating and sealing with the shaft, an installation gap a located above the oil seal a between the bushing and the shaft, and a gas channel connecting the interior of the main purge rod and the installation gap a.

[0011] As an improvement, the self-cleaning mechanism includes a guide plate coaxially mounted on the top of the rotating shaft and in the shape of an umbrella, and several sets of air guide holes communicating with the gas channel; the receiving side of the guide plate faces the air guide holes, and the exhaust side of the guide plate faces the meshing point of the gear ring and the gear.

[0012] As an improvement, the support assembly includes a bearing with its inner ring mounted on the main purge rod, a bearing bracket sleeved below the outer ring of the bearing, an oil seal b disposed between the bearing bracket and the bearing and in sealing contact with the main purge rod, an installation gap b formed between the bearing bracket, the main purge rod, and the oil seal b and inside the main purge rod, a locking nut a threadedly mounted on the main purge rod and in contact with the inner ring of the bearing, a roller frame disposed on the bearing bracket and covering the bearing and the locking nut a, an oil seal c disposed on the roller frame facing the main purge rod, and an installation gap c formed between the roller frame, the main purge rod, and the oil seal c and communicating with the inside of the main purge rod, wherein the outer edge of the roller frame contacts the inner wall of the granulation tower.

[0013] As an improvement, the power unit includes a power box installed below the discharge section, two sets of tapered roller bearings coaxially arranged on the upper and lower sides of the power box, a bearing cap installed on the power box and correspondingly abutting the outer ring of the tapered roller bearing, a hollow main shaft passing between the two sets of tapered roller bearings and abutting the inner ring of the upper tapered roller bearing, two sets of locking nuts b threadedly arranged on the outside of the hollow main shaft and abutting the inner ring of the lower tapered roller bearing, a motor located on one side of the power box, and a synchronous pulley transmission unit that powerly connects the motor and the hollow main shaft; the main purging rod passes through the interior of the hollow main shaft.

[0014] As an improvement, a screening device is also included, which includes a screen that is inclinedly disposed in the discharge section and rotates with the air inlet rod, a mounting platform disposed below the screen, a spring disposed below the mounting platform, a vibrating block disposed at the bottom of the spring, a fixing block that is circumferentially arrayed at the bottom of the discharge section and can abut against the vibrating block, an air inlet that is connected to the air blowing assembly through a pipe and disposed on the other side below the discharge section relative to the discharge port, a waste outlet disposed below the discharge section, and an air seal unit b disposed between the bottom of the discharge section and the air inlet rod.

[0015] As an improvement, the air seal unit b includes a retaining ring disposed at the bottom of the discharge section and in clearance fit with the air inlet rod, a guide plate coaxially mounted above the retaining ring and with its edge turned downward, and a plurality of air holes arranged in a circumferential array on the air inlet rod and turned towards the guide plate.

[0016] The beneficial effects of this invention are as follows: (1) In this invention, the control component allows the main purge bar and the auxiliary purge bar to alternately blow air into the atomization zone and the granulation zone. The main purge bar blowing air into the atomization zone can cause the atomized raw material to gather in the middle, thereby reducing the adhesion of the atomized raw material to the inner wall of the granulation tower. The auxiliary purge bar blowing air into the granulation zone can cause the formed pigment particles to disperse in the granulation zone, preventing agglomeration and improving product quality. (2) In this invention, the rotation of the air inlet rod drives the screen in the discharge section to rotate. The vibrating block and the fixed block come into contact. Under the action of the spring, the screen will vibrate, which will improve the screening efficiency of iron oxide pigment particles. The pigment on the screen is blown to the discharge port by the gas in the air inlet, making the pigment particles produced by the equipment more uniform in size and further improving the product quality. (3) In this invention, the roller frame is a PTFE wheel, which has a small coefficient of friction and is non-stick. The material is also relatively soft, making it less prone to sticking. It can also reduce the friction of the entire rolling structure on the inner wall of the drying tower, as well as the instantaneous pressure on the granulation tower when the main purge rod rotates, thereby reducing the deformation of the granulation tower. (4) In this invention, the mounting ring in the drive mechanism is arranged around the top of the granulation tower, and the position is close to the contact position between the roller frame and the granulation tower, which increases the strength of the granulation tower in the rolling support area and further reduces the deformation of the granulation tower. (5) The present invention is provided with installation gap a, installation gap b and installation gap c that are connected to the inside of the main blow bar, thereby forming a gas passage and realizing an air seal, which can effectively prevent dust or raw materials from entering the bearing and improve the rolling efficiency and service life of the bearing. (6) In this invention, the gas sealing unit b solves the sealing problem at the junction of the air inlet rod and the discharge section. Gas flows out through the gap between the guide plate and the retaining ring to form a gas seal, which prevents the smaller finished particles from leaking out from the junction while blowing them toward the waste outlet. (7) In this invention, the guide plate in the self-cleaning mechanism directs the gas in the main blow rod to the meshing point of the gear and the gear ring, thereby cleaning the meshing point of the gear and the gear ring, making the meshing of the gear and the gear ring smoother, and further improving the forming quality and forming efficiency of pigment particles.

[0017] In summary, this invention has the advantages of ingenious structure, low maintenance cost, uniform pigment particle size, and high production efficiency, and is especially suitable for the field of iron oxide pigment particles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the granulation tower. Figure 3 A schematic diagram showing the air output status of the main purge bar and the auxiliary purge bar; Figure 4 for Figure 2 Enlarged view of point A and gas flow diagram; Figure 5 for Figure 2 Enlarged view at point B in the middle; Figure 6 Here is a cross-sectional view of the sealing mechanism a; Figure 7 This is a cross-sectional view of the sealing mechanism b; Figure 8 For alternating airflow logic table; Figure 9 This is a schematic diagram of the self-cleaning mechanism and a gas flow diagram; Figure 10 This is a sectional view of the power unit; Figure 11 This is a schematic diagram of the power unit; Figure 12 for Figure 2 Enlarged view of point C and gas flow diagram; Figure 13 This is a cross-sectional view of the granulation tower.

[0019] In the diagram: 1. Granulation tower; 11. Atomization zone; 12. Granulation zone; 13. Discharge section; 131. Discharge port; 2. Baghouse dust collector; 3. Vacuum device; 4. Spraying device; 5. Blowing device; 50. Inlet rod; 51. Main blowing rod; 52. Secondary blowing rod; 53. Control components; 530. Conical gear transmission unit; 531. Sealing mechanism a; 5311. Rotating shaft; 5312. Rubber coating layer; 532. Sealing mechanism section; 533. Drive mechanism; 5331. Mounting ring; 5332. Gear ring; 5334. Gear; 534. Air sealing unit a; 5341. Sealing ring; 5342. Oil seal a; 5343. Installation gap a; 5344. Gas passage; 535. Self-cleaning mechanism; 5351. Flow guide. 5352, Air vent, 54, Support assembly, 541, Bearing, 542, Bearing bracket, 543, Oil seal b, 544, Installation clearance b, 545, Locking nut a, 546, Roller frame, 547, Oil seal c, 548, Installation clearance c, 55, Air blowing assembly, 6, Power unit, 61, Power box, 62, Tapered roller bearing, 63, Bearing cover, 64, Hollow spindle, 65, Locking nut b, 66, Motor, 67, Synchronous pulley transmission unit, 7, Screening device, 71, Screen, 72, Mounting platform, 73, Spring, 74, Vibrating block, 75, Fixing block, 76, Air inlet, 78, Waste outlet, 79, Air seal unit b, 791, Retaining ring, 792, Guide plate, 793, Air vent. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example 1: like Figure 1 and Figure 2 As shown, a high-quality iron oxide pigment preparation and granulation device includes: Granulation tower 1, which is internally heated, includes an atomization zone 11, a granulation zone 12 and a discharge section 13 from top to bottom, and a discharge port 131 is provided on one side of the discharge section 13. A bag filter tower 2 is connected to the top of the granulation tower 1 and is used to collect dust inside the granulation tower 1. A vacuum device 3 is connected to the top of the granulation tower 1 and is used to extract air from the granulation tower 1. The spraying device 4 is connected to the top of the granulation tower 1. The spraying device 4 sprays atomized pigment raw material into the atomization zone 11. The pigment raw material moves to the granulation zone 12 and is heated and dehydrated to form hollow pigment particles. The purging device 5 includes a vertically arranged air inlet rod 50, several sets of main purging rods 51 extending from top to bottom along the inner wall contour of the granulation tower 1 and communicating with the air inlet rod 50 and arranged in a circumferential array within the granulation tower 1, auxiliary purging rods 52 communicating with the main purging rods 51 and extending into the granulation zone 12, a control component 53 correspondingly arranged within the main purging rods 51 and the auxiliary purging rods 52 and controlling them to alternately blow air onto the atomization zone 11 and the auxiliary purging rods 52, a support component 54 correspondingly arranged at the top of the main purging rods 51 and in contact with the inner wall of the granulation tower 1, and an air blowing component 55 communicating with the bottom of the air inlet rod 50 through a rotary air connector. The main purging rods 51 blow air toward the inner wall of the granulation tower 1 and the atomization zone 11, and the auxiliary purging rods 52 blow air toward the interior of the granulation zone 12. And a power unit 6, which is located at the bottom of the discharge section 13 and drives the air inlet rod 50 to rotate, and the main purging rod 51 continuously purifies the inner wall of the granulation tower 1.

[0024] It should be noted in detail that before the granulation tower 1 of this application starts working, it first needs to be vacuumed by the vacuuming device 3 to remove oxygen from the granulation tower 1 and avoid unnecessary oxidation during pigment granulation. Then, the vacuuming device 3 introduces heated inert gas into the granulation tower 1, and the granulation tower 1 itself is also heated. After the granulation tower 1 is heated to the working temperature, the spraying device 4 sprays atomized pigment raw material into the granulation tower 1. As the pigment raw material falls into the granulation tower 1, it continuously evaporates moisture and finally forms pigment particles. Due to the influence of gravity during the falling process, hollow gaps are formed inside the pigment particles, which is more conducive to the dispersion and suspension of pigment and will not form agglomeration.

[0025] It should also be noted that the gas supplied by the blowing assembly 55 to the main blowing rod 51 and the auxiliary blowing rod 52 is an inert gas, which can prevent the oxidation of pigments while ensuring the blowing effect.

[0026] It should be further noted that the granulation tower 1, the bag filter tower 2, the vacuum device 3, the spraying device 4, the air blowing assembly 55 and the rotary air connector are all existing technologies, and will not be described in detail here.

[0027] It is worth mentioning that, such as Figure 2 and Figure 13 As shown, in order to achieve better aggregation of atomized raw materials and dispersion of pigment particles, the three sets of main purge rods 51 and auxiliary purge rods 52 are arranged in a circumferential array, and their air outlet state diagram is shown in the figure. Figure 3 As shown, the control component 53 controls the air output state of both the atomizing zone 11 and the granulation zone 12.

[0028] Furthermore, the control component 53 includes a blocking mechanism a531 rotatably disposed within the main purge bar 51 and extending upward through the main purge bar 51; a blocking mechanism b532 disposed within the auxiliary purge bar 52 and linked to the blocking mechanism a531 via a bevel gear transmission unit 530; a drive mechanism 533 disposed at the top of the blocking mechanism a531 and driving the blocking mechanism a531 to rotate; an air seal unit a534 disposed at the point where the blocking mechanism a531 passes through the main purge bar 51; and a self-cleaning mechanism 535 disposed above the drive mechanism 533 and communicating with the air seal unit a534.

[0029] Furthermore, such as Figures 4 to 6As shown, both the sealing mechanism a531 and the sealing mechanism b532 include a rotating shaft 5311 installed inside the bushing and rotatably disposed therein, and an adhesive layer 5312 covering the outside of the rotating shaft 5311 and capable of sealing the air outlet. In the sealing mechanism a531, the rotating shaft 5311 is eccentrically disposed inside the main purge rod 51, and the corresponding adhesive layer 5312 has a four-lobed cross section. In the sealing mechanism b532, the rotating shaft 5311 is coaxially disposed inside the auxiliary purge rod 52, and the corresponding adhesive layer 5312 has a two-lobed cross section.

[0030] It should be noted that, as Figure 6 As shown, the coating layer 5312 is made of a flexible material, so the coating layer 5312 can better seal the air outlet when it comes into contact with the inner walls of the main purge bar 51 and the auxiliary purge bar 52.

[0031] It should also be noted that the rotating shaft 5311 is inserted into the bushing, and a stepped surface is provided to contact the bushing for limiting, thereby preventing the rotating shaft 5311 from moving axially. In order to facilitate the installation and subsequent maintenance of the rotating shaft 5311, and to facilitate the processing and production of the main purge rod 51 and the auxiliary purge rod 52, the main purge rod 51 and the auxiliary purge rod 52 are in the form of segmented splicing and assembly. The assembly is achieved by flange docking, positioning key limiting, and sealing strip sealing, which ensures the rigidity of the equipment without affecting its function.

[0032] It is important to note that, as Figures 5 to 7 As shown, the transmission ratio of the conical gear transmission unit 530 is 1:1. Due to the flexible material properties of the rubber coating layer 5312, it can be compressed. The petal-shaped sealing angle of the rubber coating layer 5312 in the main purge rod 51 is 30° when the rotating shaft 5311 rotates, and the petal-shaped sealing angle of the rubber coating layer 5312 in the auxiliary purge rod 52 is 150° when the rotating shaft 5311 rotates. The main purge rod 51 and the auxiliary purge rod 52 are arranged according to... Figure 8 The logic implements alternating air output, with the air blowing time in the granulation zone 12 being shorter than that in the atomization zone 11. This ensures smooth feeding while achieving efficient discharge, and further guarantees that the raw materials in the atomization zone 11 will not adhere to the inner wall of the granulation tower 1.

[0033] More notably, the main purge bar 51 blows air into the atomization zone 11, which minimizes the amount of atomized pigment raw material adhering to the inner wall of the granulation tower 1; the auxiliary purge bar 52 blows air into the granulation zone 12, which makes the formed pigment particles more dispersed and prevents them from agglomerating.

[0034] Furthermore, such as Figure 4As shown, the drive mechanism 533 includes an installation ring 5331 surrounding the top of the granulation tower 1, a gear ring 5332 disposed on the installation ring 5331, and a gear 5333 installed above the rotating shaft 5311 corresponding to the sealing mechanism a531 and meshing with the gear ring 5332.

[0035] It should be noted that the mounting ring 5331 is disposed at the top of the granulation tower 1, thereby increasing the rigidity of the granulation tower 1 and effectively preventing the granulation tower 1 from deforming.

[0036] Furthermore, such as Figure 7 and Figure 9 As shown, the gas sealing unit a534 includes a sealing ring 5341 at the connection between the main purge rod 51 and the bushing, an oil seal a5342 disposed inside the bushing and rotatingly sealing the shaft 5311, an installation gap a5343 located above the oil seal a5342 between the bushing and the shaft 5311, and a gas channel 5344 connecting the interior of the main purge rod 51 and the installation gap a5343.

[0037] It should be noted that the oil seal a5342 provides lubrication for the rotation of the shaft 5311, and at the same time, gas enters the installation gap a5343 from the main blow rod 51 through the gas channel 5344, which can prevent dust and impurities from entering the interior of the main blow rod 51.

[0038] It should also be noted that the sealing ring 5341 further enhances the sealing performance of the bushing installation.

[0039] Furthermore, such as Figure 4 and Figure 7 As shown, the self-cleaning mechanism 535 includes a guide plate 5351 coaxially mounted on the top of the rotating shaft 5311 and in the shape of an umbrella, and a plurality of air guide holes 5352 communicating with the gas channel 5344; the air receiving side of the guide plate 5351 faces the air guide hole 5352, and the exhaust side of the guide plate 5351 faces the meshing point of the gear ring 5332 and the gear 5333.

[0040] It should be noted that the gas enters the receiving side of the guide plate 5351 through the gas channel 5344 and the air guide hole 5352. The gas moves along the lower contour of the guide plate 5351 to its exhaust side and is blown towards the meshing point of the gear 5333 and the gear ring 5332 for cleaning. This can prevent the adhesion of pigment raw materials and dust and improve the stability of the engagement of the gear 5333 and the gear ring 5332.

[0041] Furthermore, such as Figure 4As shown, the support assembly 54 includes a bearing 541 whose inner ring is mounted on the main purge rod 51; a bearing bracket 542 sleeved below the outer ring of the bearing 541; an oil seal b543 disposed between the bearing bracket 542 and the bearing 541 and in sealing contact with the main purge rod 51; an installation gap b544 formed between the bearing bracket 542, the main purge rod 51 and the oil seal b543 and inside the main purge rod 51; and a threaded mounting on the main purge rod 51 and in contact with the bearing 541. The roller bracket 546 is provided on the bearing support 542 and covers the bearing 541 and the locking nut a545. An oil seal c547 is provided on the roller bracket 546 facing the main purge rod 51. An installation gap c548 is formed between the roller bracket 546, the main purge rod 51 and the oil seal c547 and communicates with the interior of the main purge rod 51. The outer edge of the roller bracket 546 is in contact with the inner wall of the granulation tower 1.

[0042] It should be noted that the roller frame 546 is a PTFE roller, which has a low coefficient of friction and is non-stick. The material is also relatively soft, making it less prone to material sticking, and it can reduce the friction of the entire rolling structure on the inner wall of the drying tower.

[0043] It is worth mentioning that the axial force of the support component 54 is not borne, so the bearing 541 is preferably a deep groove ball bearing, and the locking nut a545 is a precision locking nut with a set screw on the side, which can effectively prevent loosening.

[0044] It should also be noted that the oil seal b543 provides lubrication for the rotation of the bearing 541, and the oil seal c547 provides lubrication for the roller frame 546 and the main blow rod 51; the mounting gaps b544 and c548 are both connected to the main blow rod 51, and gas enters into the mounting gaps b544 and c548, thereby achieving a seal on the bearing 541, preventing dust or raw materials from entering the bearing 541, and improving the rolling efficiency and service life of the bearing 541; Furthermore, such as Figure 10 and Figure 11As shown, the power unit 6 includes a power box 61 installed below the discharge section 13, two sets of tapered roller bearings 62 coaxially arranged on the upper and lower sides of the power box 61, a bearing cap 63 installed on the power box 61 and correspondingly abutting the outer ring of the tapered roller bearings 62, a hollow main shaft 64 passing between the two sets of tapered roller bearings 62 and abutting the inner ring of the upper tapered roller bearing 62, two sets of locking nuts b65 threadedly arranged on the outside of the hollow main shaft 64 and abutting the inner ring of the lower tapered roller bearing 62, a motor 66 arranged on one side of the power box 61, and a synchronous pulley transmission unit 67 that powerly connects the motor 66 and the hollow main shaft 64; the main blowing rod 51 passes through the interior of the hollow main shaft 64.

[0045] It should be noted that the tapered roller bearing 62 increases the rigidity of the power unit 6, thereby preventing the power unit 6 from shaking during the rotation of the intake rod 50 and the main purge rod 51; when the main purge rod 51 passes through the hollow main shaft 64, the two are connected by a flange and positioned by a positioning key to achieve synchronous rotation; the motor 66 is preferably a geared motor, which can increase the torque so that the hollow main shaft 64 and the main purge rod 51 can rotate smoothly; the synchronous pulley transmission unit 67 is preferably a speed reduction transmission setting, thereby improving the stability of the rotation of the main purge rod 51.

[0046] It is worth mentioning that the two sets of locking nuts b65 can further prevent the tapered roller bearing 62 from loosening.

[0047] It is also necessary to explain that, such as Figure 6 As shown, the main purging rod 51 is spaced apart from the inner wall of the granulation tower 1. During its rotation, it continuously purifies the inner wall of the granulation tower 1. The main purging rod 51 has multiple sets of air outlets on the side facing the inner wall of the granulation tower 1, thereby ensuring the purging effect.

[0048] Example 2: like Figure 10 and Figure 12 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: A high-quality iron oxide pigment preparation granulation equipment further includes a screening device 7, which includes a screen 71 inclinedly disposed within the discharge section 13 and rotating with the air inlet rod 50, a mounting platform 72 disposed below the screen 71, a spring 73 disposed below the mounting platform, a vibrating block 74 disposed at the bottom of the spring 73, a fixing block 75 circumferentially distributed at the bottom of the discharge section 13 and capable of abutting against the vibrating block 74, an air inlet 76 communicating with the air blowing assembly 55 through a pipe and disposed on the other side below the discharge section 13 relative to the discharge port 131, a waste outlet 78 disposed below the discharge section 13, and an air seal unit b79 disposed between the bottom of the discharge section 13 and the air inlet rod 50.

[0049] It should be noted that the pipe connected to the air inlet 76 is controlled by a solenoid valve. When the lowest side of the screen 71 rotates to be below the air inlet 76, its highest side is located below the discharge port 131. Air enters through the air inlet 76, thereby blowing the pigment particles toward the discharge port 131.

[0050] It should also be noted that during the rotation of the screen 71 with the main blowing rod 51, the vibrating block 74 abuts against the fixed block 75, thereby causing the spring 73 to shake and transmit the shaking to the screen 71, thus improving the screening efficiency of pigment particles.

[0051] Furthermore, the air seal unit b79 includes a retaining ring 791 disposed at the bottom of the discharge section 13 and in clearance fit with the air inlet rod 50, a guide plate 792 coaxially mounted above the retaining ring 791 and with its edge turned downward, and a plurality of air holes 793 arranged in a circumferential array on the air inlet rod 50 and turned towards the guide plate 792.

[0052] It should be noted that the gas is blown through the air hole 793 into the gap formed between the baffle ring 791 and the guide plate 792, thereby achieving gas sealing at the junction of the main blowing rod 51 and the bottom of the discharge section 13. Furthermore, this blowing process can blow smaller finished particles toward the waste outlet 78, which is beneficial for waste collection.

[0053] Work process: The vacuum pumping device 3 performs vacuuming treatment on the interior of the granulation tower 1. Then, the vacuum pumping device 3 introduces heated inert gas into the granulation tower 1, while the granulation tower 1 itself is also heated. After the granulation tower 1 reaches its operating temperature, the spraying device 4 sprays atomized pigment raw material into the granulation tower 1. During the falling process of the pigment raw material, the power device 6 rotates, driving the main blow rod 51 and the auxiliary blow rod 52 to rotate. The main blow rod 51 continuously blows against the inner wall of the granulation tower 1. Simultaneously, under the action of the control component 53, the main blow rod 51 and the auxiliary blow rod 52 alternately blow air into the atomization zone 11 and the granulation zone 12. The main blow rod 51 blows air into the atomization zone 11. This allows the atomized raw materials to converge towards the center, thereby reducing the adhesion of the atomized raw materials to the inner wall of the granulation tower 1; the auxiliary blowing rod 52 blows air into the granulation zone 12, which disperses the formed pigment particles in the granulation zone 12 and prevents them from agglomerating. Finally, the pigment particles fall onto the screen 71. During the rotation of the screen 71, the vibrating block 74 abuts against the fixed block 75, thereby causing the spring 73 to shake and transmit the shaking to the screen 71. Qualified pigment particles are located on the screen 71. Finally, when the lowest side of the screen 71 rotates to below the air inlet 76, its highest side is located below the discharge port 131. Air enters through the air inlet 76, thereby blowing the pigment particles toward the discharge port 131 for collection.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-quality iron oxide pigment preparation and granulation device, characterized in that, include: Granulation tower (1), the granulation tower (1) is internally heated, and from top to bottom it includes an atomization zone (11), a granulation zone (12) and a discharge section (13), and the discharge section (13) is provided with a discharge port (131) on one side. A bag filter tower (2) is connected to the top of the granulation tower (1) and is used to collect dust inside the granulation tower (1); A vacuum pumping device (3) is connected to the top of the granulation tower (1) and is used to extract air from the granulation tower (1). Spraying device (4), the spraying device (4) is connected to the top of the granulation tower (1), the spraying device (4) sprays atomized pigment raw material into the atomization zone (11), the pigment raw material moves to the granulation zone (12) and is heated and dehydrated to form hollow pigment particles. The purging device (5) includes a vertically arranged air inlet rod (50) extending from top to bottom along the inner wall contour of the granulation tower (1) and the air inlet rod (50). The granulation tower (1) is equipped with several sets of main purge rods (51) arranged in a circular array, a secondary purge rod (52) connected to the main purge rods (51) and extending into the granulation zone (12), a control component (53) corresponding to the main purge rods (51) and the secondary purge rods (52) and controlling them to alternately blow air onto the atomization zone (11) and the secondary purge rods (52), a support component (54) corresponding to the top of the main purge rods (51) and in contact with the inner wall of the granulation tower (1), and a blowing component (55) connected to the bottom of the air inlet rod (50) through a rotary air connector. The main purge rods (51) blow air toward the inner wall of the granulation tower (1) and the atomization zone (11), and the secondary purge rods (52) blow air toward the interior of the granulation zone (12). The control component (53) includes a rotatably arranged on the main purge rods (51) and the secondary purge rods (52). 51) A blocking mechanism a (531) that extends upward through the main purge rod (51) and a blocking mechanism b (532) that is located inside the auxiliary purge rod (52) and is linked to the blocking mechanism a (531) via a bevel gear transmission unit (530). Both the blocking mechanism a (531) and the blocking mechanism b (532) include a rotating shaft (5311) that is installed inside the bushing and rotates, and an adhesive layer (5312) that covers the outside of the rotating shaft (5311) and can block the air outlet. The rotating shaft (5311) in the blocking mechanism a (531) is eccentrically located inside the main purge rod (51), and the corresponding adhesive layer (5312) has a four-lobed cross section. The rotating shaft (5311) in the blocking mechanism b (532) is coaxially located inside the auxiliary purge rod (52), and the corresponding adhesive layer (5312) has a two-lobed cross section. as well as The power unit (6) is located at the bottom of the discharge section (13) and drives the air inlet rod (50) to rotate. The main purging rod (51) continuously purges the inner wall of the granulation tower (1).

2. The high-quality iron oxide pigment preparation and granulation equipment according to claim 1, characterized in that, The control component (53) further includes a drive mechanism (533) disposed at the top of the sealing mechanism a (531) and driving the sealing mechanism a (531) to rotate, an air seal unit a (534) disposed at the point where the sealing mechanism a (531) and the main blow bar (51) pass through, and a self-cleaning mechanism (535) disposed above the drive mechanism (533) and communicating with the air seal unit a (534).

3. The high-quality iron oxide pigment preparation and granulation equipment according to claim 2, characterized in that, The drive mechanism (533) includes an mounting ring (5331) surrounding the top of the granulation tower (1), a gear ring (5332) on the mounting ring (5331), and a gear (5333) mounted above the rotating shaft (5311) corresponding to the sealing mechanism a (531) and meshing with the gear ring (5332).

4. The high-quality iron oxide pigment preparation and granulation equipment according to claim 3, characterized in that, The gas sealing unit a (534) includes a sealing ring (5341) at the connection between the main purge rod (51) and the bushing, an oil seal a (5342) disposed inside the bushing and rotating and sealing the shaft (5311), an installation gap a (5343) located above the oil seal a (5342) between the bushing and the shaft (5311), and a gas channel (5344) connecting the interior of the main purge rod (51) and the installation gap a (5343).

5. The high-quality iron oxide pigment preparation and granulation equipment according to claim 4, characterized in that, The self-cleaning mechanism (535) includes a guide plate (5351) coaxially mounted on the top of the rotating shaft (5311) and in the shape of an umbrella, and a number of air guide holes (5352) communicating with the gas channel (5344); the receiving side of the guide plate (5351) faces the air guide hole (5352), and the exhaust side of the guide plate (5351) faces the meshing point of the gear ring (5332) and the gear (5333).

6. The high-quality iron oxide pigment preparation and granulation equipment according to claim 1, characterized in that, The support assembly (54) includes a bearing (541) with its inner ring mounted on the main purge rod (51), a bearing bracket (542) sleeved below the outer ring of the bearing (541), an oil seal b (543) disposed between the bearing bracket (542) and the bearing (541) and in sealing contact with the main purge rod (51), an installation gap b (544) formed between the bearing bracket (542), the main purge rod (51) and the oil seal b (543) and inside the main purge rod (51), and threadedly mounted on the main purge rod (51) and in contact with the bearing. (541) A locking nut a (545) with inner ring abutting fit, a roller frame (546) disposed on the bearing bracket (542) and covering the bearing (541) and the locking nut a (545), an oil seal c (547) disposed on the roller frame (546) facing the main purge rod (51), and an installation gap c (548) formed between the roller frame (546), the main purge rod (51) and the oil seal c (547) and communicating with the interior of the main purge rod (51), the outer edge of the roller frame (546) is in contact with the inner wall of the granulation tower (1).

7. The high-quality iron oxide pigment preparation and granulation equipment according to claim 1, characterized in that, The power unit (6) includes a power box (61) installed below the discharge section (13), two sets of tapered roller bearings (62) coaxially arranged on the upper and lower sides of the power box (61), a bearing cap (63) installed on the power box (61) and correspondingly abutting the outer ring of the tapered roller bearing (62), a hollow spindle (64) passing between the two sets of tapered roller bearings (62) and abutting the inner ring of the upper tapered roller bearing (62), two sets of locking nuts b (65) threadedly arranged on the outside of the hollow spindle (64) and abutting the inner ring of the lower tapered roller bearing (62), a motor (66) arranged on one side of the power box (61), and a synchronous pulley transmission unit (67) that powerly connects the motor (66) and the hollow spindle (64); the main blowing rod (51) passes through the interior of the hollow spindle (64).

8. The high-quality iron oxide pigment preparation and granulation equipment according to claim 1, characterized in that, It also includes a screening device (7), which includes a screen (71) that is inclinedly disposed in the discharge section (13) and rotates with the air inlet rod (50), a mounting platform (72) disposed below the screen (71), a spring (73) disposed below the mounting platform, a vibrating block (74) disposed at the bottom of the spring (73), a fixing block (75) that is circumferentially distributed at the bottom of the discharge section (13) and can abut against the vibrating block (74), an air inlet (76) that is connected to the air blowing assembly (55) through a pipe and disposed on the other side below the discharge section (13) relative to the discharge port (131), a waste outlet (78) disposed below the discharge section (13), and an air seal unit b (79) disposed between the bottom of the discharge section (13) and the air inlet rod (50).

9. The high-quality iron oxide pigment preparation and granulation equipment according to claim 8, characterized in that, The air seal unit b (79) includes a retaining ring (791) disposed at the bottom of the discharge section (13) and in clearance fit with the air inlet rod (50), a guide plate (792) coaxially mounted above the retaining ring (791) and with its edge turned down, and a number of air holes (793) arranged in a circumferential array on the air inlet rod (50) and turned towards the guide plate (792).

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