Spiral feeding mechanism and aluminum hydroxide gaseous suspension roasting device comprising same

Abstract

The utility model discloses a spiral feeding mechanism and an aluminum hydroxide gaseous suspension roasting device including the same, a spiral feeder comprises a feeding cylinder and a feeding screw accommodated in the feeding cylinder, the discharge end of the feeding cylinder protrudes into a chamber of a blender, the upper side of the discharge end of the feeding cylinder is provided with a first discharge port, and a second discharge port is formed in the lower side of the discharge end of the blender. The feeding spiral part is located under the first discharging opening, and the end opening, formed in the mixer, of the feeding barrel is a second discharging opening. Compared with the prior art, upward escape discharging or falling discharging is bidirectionally coordinated, the dispersity of aluminum hydroxide at the discharging end of the screw feeder is enhanced, the actual feeding amount of aluminum hydroxide powder is increased, and the air volume and the linear change length of the feeding amount are optimized.

Description

Technical Field

[0001] This utility model relates to the gaseous suspension roasting of aluminum hydroxide, and more particularly to a screw feeding mechanism and an aluminum hydroxide gaseous suspension roasting apparatus including the screw feeding mechanism. Background Technology

[0002] In the gaseous suspension roasting of aluminum hydroxide, hot air flows from bottom to top in the mixer. The aluminum hydroxide powder discharged by the screw feeder is carried away by the hot air. The hot air mixes the aluminum hydroxide powder and introduces it into the roasting furnace. Further air is introduced into the bottom of the roasting furnace, so that the aluminum hydroxide powder is roasted in a gaseous and suspended form.

[0003] Therefore, once the roasting furnace is determined, the main task for increasing production in the later stages is to increase the air volume, that is, to increase the airflow in the mixer.

[0004] For prior art, see CN220765615U, or see the appendix. Figure 7 The structure shown and its appendix Figure 8 The aluminum hydroxide powder feed direction V is shown. 23 In existing screw feeders, aluminum hydroxide powder is extruded through a port-feeding method. Some even have a scraper connected to the screw at the feed cylinder port, accelerating the collapse of the powder at the discharge end of the cylinder through scraping. Specifically, there is a buffer gap / buffer space / buffer interval between the screw and the discharge port of the feed cylinder. The screw is designed to continuously add aluminum hydroxide powder into this buffer gap, causing each clump / strand of powder to continuously collapse into the mixer. Although the upward flow of hot air in the mixer has increased, the actual feed rate of aluminum hydroxide powder (actual mixing air volume / actual powder mixed into the hot air) by the screw feeder mechanism still cannot be ideally improved. For the existing screw feeder mechanism, increasing the air volume can increase the actual feed amount of aluminum hydroxide powder (actual mixed air volume) to a certain extent. However, when the air volume is gradually increased, the actual feed amount of aluminum hydroxide powder does not have a long linear increase compared with the air volume. That is, the feed amount of aluminum hydroxide powder is not ideally increased. Each clump / strand of aluminum hydroxide powder is not fully mixed with hot air, and the amount of aluminum hydroxide powder settling is relatively large. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems mentioned above, and provides a screw feeding mechanism and an aluminum hydroxide gas suspension calcination device including the screw feeder, thereby enhancing the dispersion of aluminum hydroxide at the discharge end of the screw feeder and increasing the actual feed rate of aluminum hydroxide powder.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A screw feeding mechanism includes a mixer and a screw feeder. The screw feeder includes a feeding cylinder and a feeding screw housed in the feeding cylinder. The discharge end of the feeding cylinder protrudes into the cavity of the mixer, and a first discharge port is opened on the upper side of the discharge end of the feeding cylinder. The feeding screw is located directly below the first discharge port, and the port of the feeding cylinder in the mixer is configured as a second discharge port.

[0008] Compared with the prior art, the beneficial effects of this application include: bidirectional coordination of upward or downward discharge, enhanced dispersion of aluminum hydroxide at the discharge end of the screw feeder, increased actual feed rate of aluminum hydroxide powder, and optimized linear variation length of air volume and feed rate.

[0009] As an improvement to the above technical solution, the mixer is provided with a diameter reduction and speed increase section, the discharge end of the feed cylinder corresponds to the diameter reduction and speed increase section, and the speed increase air of the diameter reduction and speed increase section is suitable for blowing the discharge end of the feed cylinder.

[0010] As an improvement to the above technical solution, the mixer is provided with a diameter-increasing and supplementary mixing section, which is in the shape of a waist drum. The discharge end of the feed cylinder and the diameter-increasing and supplementary mixing section are arranged sequentially along the airflow direction of the mixer.

[0011] As an improvement to the above technical solution, the feeding screw is connected to a decorative blade, which is suitable for scraping off and / or scattering the material at the second discharge port.

[0012] As an improvement to the above technical solution, the decorative blade is provided with 5 to 8 scraper blades.

[0013] As an improvement to the above technical solution, the decorative blade is adapted to scrape the end face of the discharge end of the feed cylinder.

[0014] As an improvement to the above technical solution, the mixer has a first flange protruding from its peripheral wall, and a second flange is provided in the middle of the feed cylinder. The first flange is adapted to pass through the discharge end of the feed cylinder and the decorative cutter, and the second flange is detachably connected to the first flange.

[0015] As an improvement to the above technical solution, the decorative cutter is detachably connected to the feeding screw, and the second discharge port is suitable for extracting and loading the feeding screw.

[0016] On the other hand, an aluminum hydroxide gaseous suspension roasting apparatus includes a roasting furnace, a first deflector cyclone and the aforementioned screw feeder, wherein the first deflector cyclone is adapted to receive the gas-solid mixture discharged from the roasting furnace, the mixer is adapted to replenish the hot smoke discharged from the first deflector cyclone, and the roasting furnace is adapted to replenish the material discharged from the mixer.

[0017] As an improvement to the above technical solution, a preheating cyclone is also included, wherein the preheating cyclone is adapted to be fed with the hot smoke discharged by the first settling cyclone and the material discharged by the mixer, and the roasting furnace is adapted to be fed with the material settled by the preheating cyclone. Attached Figure Description

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a flowchart of the aluminum hydroxide gaseous suspension calcination apparatus according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the screw feeding mechanism of the aluminum hydroxide gas suspension calcination device is shown.

[0021] Figure 3 for Figure 2 A three-dimensional sectional view of the screw feeder mechanism is shown;

[0022] Figure 4 for Figure 3 A partial structural schematic diagram of the screw feeder mechanism is shown;

[0023] Figure 5 for Figure 3 An exploded view of the screw feeder mechanism is shown;

[0024] Figure 6 for Figure 2 A frontal sectional view of the screw feeder mechanism is shown;

[0025] Figure 7 A three-dimensional sectional view of an existing spiral feeding mechanism;

[0026] Figure 8 This is a frontal sectional view of an existing spiral feeding mechanism.

[0027] The accompanying drawings are only one specific embodiment of this utility model, and the form and structure of this specific embodiment should not limit the extension of other embodiments.

[0028] Mixer 100, diameter reduction and speed increase section 110, diameter increase and supplementary mixing section 120, first flange 130;

[0029] Screw feeder 200, feed cylinder 210, first discharge port 211, second discharge port 212, second flange 213, feed funnel 214, feed screw 220, perforator 230, scraper 231;

[0030] The roasting furnace is P04, the first material-lowering cyclone is P03, the preheating cyclone is P02, and the second material-lowering cyclone is P01. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 2 to 6 This utility model provides a screw feeding mechanism, including a mixer 100 and a screw feeder 200. The screw feeder 200 includes a feeding cylinder 210 and a feeding screw 220 housed in the feeding cylinder 210. The discharge end of the feeding cylinder 210 protrudes into the cavity of the mixer 100, and a first discharge port 211 is opened on the upper side of the discharge end of the feeding cylinder 210. The feeding screw 220 is located directly below the first discharge port 211, and the port of the feeding cylinder 210 is set at the second discharge port 212 of the mixer 100.

[0033] It is understandable that one end of the feed cylinder 210 is the inlet end and the other end is the outlet end, and the inlet end of the feed cylinder 210 is provided with a feed port. Preferably, the feed port of the feed cylinder 210 is set as a feed funnel 214.

[0034] Understandably, manually driving the feed screw 220 is not economical. The feed screw 220 is connected to a feed motor, such as a starter motor (commonly known as an electric motor), pneumatic motor, or hydraulic motor. The feed motor can be detachably connected to the feed screw 220 via flexible couplings, universal couplings, or other similar methods.

[0035] The operation process of this utility model can be as follows: (Refer to...) Figure 6 Aluminum hydroxide powder is poured into feed funnel 214, with the pouring direction being V1;

[0036] Hot air or hot smoke flows through the mixer 100, with the hot air / hot smoke flow direction V3, and an airflow is formed inside the mixer 100.

[0037] The feeding screw 220 rotates continuously, and the feeding funnel 214 continuously pours in aluminum hydroxide powder. The threaded blades of the feeding screw 220 push the aluminum hydroxide powder, causing the aluminum hydroxide powder to be squeezed from the feeding end of the feeding cylinder 210 to the discharge end.

[0038] The aluminum hydroxide powder reaching the discharge end of the feed cylinder 210 is referenced. Figure 6 V is shown 22 Some aluminum hydroxide powder broke off from the second discharge port 212 and dispersed into the airflow, then rose in a gaseous state, as shown in the reference. Figure 6 V is shown 21Some aluminum hydroxide powder is drawn away by the airflow and drifts out from the first discharge port 211, and is mixed with the airflow. The feeding screw 220 continuously stirs the aluminum hydroxide powder at the discharge end and continuously replenishes the aluminum hydroxide powder, which is conducive to the stable discharge of aluminum hydroxide powder from the first discharge port 211.

[0039] The feeding screw 220 continuously replenishes and agitates the material, while the mixer 100 continuously emits hot air or smoke. The upward or downward discharge is coordinated, ensuring a stable discharge volume at the second discharge port 212. This prevents sudden increases or decreases in material volume and avoids material agglomeration and partial settling. This ensures stable discharge from both the first and second discharge ports 211 and 212 of the screw feeder 200, forming a stable discharge end for the screw feeder 200. Figure 6 A schematic diagram of a stable material ramp;

[0040] The discharge end of mixer 100 forms a gas-solid mixed flow. The direction of the gas-solid mixed flow discharged from mixer 100 is shown in [reference needed]. Figure 6 V4 is shown.

[0041] Compared with the prior art, the beneficial effects of this application include: bidirectional coordination of upward or downward discharge, enhanced dispersion of aluminum hydroxide at the discharge end of the screw feeder 200, increased actual feed rate of aluminum hydroxide powder, and optimized linear variation length of air volume and feed rate.

[0042] Reference Figures 3 to 6 In some embodiments of this utility model, the feeding screw 220 is connected to a decorative blade 230, which is suitable for scraping off and / or scattering the material at the second discharge port 212, further ensuring the stable discharge of the second discharge port 212 and ensuring the dispersion of the material at the second discharge port 212.

[0043] The decorative knife 230 is a fan-shaped tool that includes a central rotating block and multiple blades / fans / scrapers 231 distributed around the central brick.

[0044] Reference Figures 3 to 5 Ideally, the decorative blade 230 is equipped with 5 to 8 blades, and the scraper 231 is preferably 6 blades.

[0045] Reference Figures 3 to 6 In some embodiments of this utility model, the scalpel 230 is adapted to scrape the end face of the discharge end of the feed cylinder 210, reduce the material buildup at the second discharge port 212, keep the second discharge port 212 clean, ensure stable material discharge from the second discharge port 212, and ensure that the discharged material can be stably dispersed and mixed by the airflow.

[0046] Reference Figures 2 to 6In some embodiments of this utility model, the mixer 100 has a first flange 130 protruding from its peripheral wall, and a second flange 213 is provided in the middle of the feed cylinder 210. The first flange 130 is suitable for the discharge end of the feed cylinder 210 and the decorative cutter 230 to pass through. The feed cylinder 210 is inserted into the first flange 130, and the second flange 213 is detachably connected to the first flange 130, such as by screw connection, snap connection, etc. The screw feeder 200 is easy to disassemble and maintain, that is, it is easy to clean the first discharge port 211, the second discharge port 212 and the decorative cutter 230 of the screw feeder 200.

[0047] Reference Figures 3 to 5 In some embodiments of this utility model, the flower knife 230 is detachably connected to the feeding screw 220, and the second discharge port 212 is suitable for pulling out and loading the feeding screw 220. That is, the feeding screw 220 can be loaded into the feeding cylinder 210 through the second discharge port 212 and can be pulled out of the feeding cylinder 210 from the second discharge port 212.

[0048] Reference Figure 5 , Figure 6 In some embodiments of this utility model, the feed end of the feed cylinder 210 is integrally formed with a fixed end cover. One end of the feed screw 220 is adapted to pass through the fixed end cover and connect to a rolling bearing on the outside of the fixed end cover. The fixed end cover is screwed to a bearing cover and is adapted to clamp the rolling bearing together. Therefore, the feed screw 220 is connected to a rolling bearing suitable for stable rotation, and the feed screw 220 and the rolling bearing are easy to assemble and disassemble.

[0049] Reference Figures 2 to 6 In some embodiments of this utility model, the mixer 100 is provided with a diameter reduction and speed-up section 110 (Venturi effect tube), the discharge end of the feed cylinder 210 corresponds to the diameter reduction and speed-up section 110, the speed-up air of the diameter reduction and speed-up section 110 is suitable for blowing on the discharge end of the feed cylinder 210, thereby improving the dispersing effect and gas mixing uniformity of the material falling from the second discharge port 212, and improving the negative pressure of the material escaping from the first discharge port 211.

[0050] Reference Figures 2 to 6 In some embodiments of this invention, the mixer 100 is provided with a diameter-enlarging and supplementary mixing section 120. The diameter-enlarging and supplementary mixing section 120 is waist-shaped, with a rounded transition or a convex transition at the top and bottom. The discharge end of the feed cylinder 210 and the diameter-enlarging and supplementary mixing section 120 are arranged sequentially along the airflow direction of the mixer 100. In this invention, the uniformity of the aluminum hydroxide powder mixing is improved, the gaseous effect of aluminum hydroxide is enhanced, and turbulence of the aluminum hydroxide powder in the diameter-enlarging and supplementary mixing section 120 is avoided.

[0051] Reference Figure 1A gaseous suspension roasting device for aluminum hydroxide includes a roasting furnace P04, a first descending cyclone P03, and the aforementioned screw feeding mechanism. It is understood that the roasting furnace P04 is provided with an air inlet at the bottom and a burner. The first descending cyclone P03 is adapted to receive the gas-solid mixture discharged from the roasting furnace P04. The mixer 100 is adapted to supplement the hot smoke discharged from the first descending cyclone P03. Therefore, the hot smoke is unclean hot air. The roasting furnace P04 is adapted to supplement the material discharged from the mixer 100.

[0052] Reference Figure 1 Preferably, it also includes a preheating cyclone P02, which is suitable for feeding the hot smoke discharged from the first settling cyclone P03 and the material discharged from the mixer 100. That is, the material discharged from the mixer 100 is preheated by the preheating cyclone P02 and then discharged into the roasting furnace P04. The hot smoke discharged from the first settling cyclone P03 is used to preheat the material and then fed into the mixer 100. The roasting furnace P04 is suitable for feeding the material settled by the preheating cyclone P02.

[0053] Reference Figure 1 Furthermore, it also includes a second material settling cyclone P01, which is suitable for receiving the material discharged from the mixer 100. The preheating cyclone P02 is suitable for supplementing the material settled by the second material settling cyclone P01. That is, the material and airflow discharged from the mixer 100 are separated by the second material settling cyclone P01. The separated material will be preheated by the preheating cyclone P02 and finally discharged into the roasting furnace P04.

[0054] Reference Figure 1 It also includes one or more connected cooling cyclones. The last cooling cyclone is suitable for replenishing fresh air, the middle cooling cyclones are suitable for replenishing the air discharged by the next cooling cyclone and the material settled by the previous cooling cyclone, the first cooling cyclone is suitable for receiving the material settled by the first material dropping cyclone P03, and the first cooling cyclone is suitable for exhausting hot air to the bottom of the roasting furnace P04.

[0055] Reference Figure 1 The aluminum hydroxide gaseous suspension roasting device is equipped with four cooling cyclones, from CO1 to CO4.

[0056] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of the technical solution of this utility model.

Claims

1. A screw feeding mechanism, characterized in that, include: Mixer; A screw feeder includes a feed cylinder and a feeding screw housed in the feed cylinder. The discharge end of the feed cylinder protrudes into the cavity of the mixer, and a first discharge port is opened on the upper side of the discharge end of the feed cylinder. The feeding screw is located directly below the first discharge port, and the feed cylinder is positioned at the port of the mixer as a second discharge port.

2. The screw feeding mechanism according to claim 1, characterized in that, The mixer is provided with a diameter reduction and speed increase section, the discharge end of the feed cylinder corresponds to the diameter reduction and speed increase section, and the speed increase air of the diameter reduction and speed increase section is suitable for blowing the discharge end of the feed cylinder.

3. The screw feeding mechanism according to claim 2, characterized in that, The mixer is equipped with a diameter-increasing and supplementary mixing section, which is shaped like a waist drum. The discharge end of the feed cylinder and the diameter-increasing and supplementary mixing section are arranged sequentially along the airflow direction of the mixer.

4. The screw feeding mechanism according to any one of claims 1 to 3, characterized in that, The feeding auger is connected to a decorative blade, which is adapted to scrape off and / or disperse the material at the second discharge port.

5. The screw feeding mechanism according to claim 4, characterized in that, The decorative blade is equipped with 5 to 8 scraper blades.

6. The screw feeding mechanism according to claim 4, characterized in that, The decorative blade is suitable for scraping the end face of the feed cylinder's discharge end.

7. The screw feeding mechanism according to claim 4, characterized in that, The mixer has a first flange protruding from its peripheral wall, and a second flange is provided in the middle of the feed cylinder. The first flange is adapted to pass through the discharge end of the feed cylinder and the decorative cutter, and the second flange is detachably connected to the first flange.

8. The screw feeding mechanism according to claim 7, characterized in that, The cutting tool is detachably connected to the feeding screw, and the second discharge port is adapted to be pulled out and loaded into the feeding screw.

9. A gaseous suspension roasting apparatus for aluminum hydroxide, characterized in that, The invention includes a roasting furnace, a first deflector cyclone, and a screw feeder as described in any one of claims 1 to 8, wherein the first deflector cyclone is adapted to receive the gas-solid mixture discharged from the roasting furnace, the mixer is adapted to replenish the hot smoke discharged from the first deflector cyclone, and the roasting furnace is adapted to replenish the material discharged from the mixer.

10. The aluminum hydroxide gaseous suspension roasting apparatus according to claim 9, characterized in that, It also includes a preheating cyclone, which is adapted to feed the hot smoke discharged from the first settling cyclone and the material discharged from the mixer, and the roasting furnace is adapted to feed the material settled by the preheating cyclone.

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