Oxygen injection calcining equipment for zinc oxide production

Abstract

The utility model discloses an oxygen injection calcining equipment of zinc oxide production relates to the technical field of zinc oxide production, the utility model discloses a furnace body is provided with the baffle in the inside fixed setting of furnace body, and the sidewall of furnace body is fixed with first air inlet pipe on the baffle top and is passed through, the utility model discloses a mixing cavity is arranged between the inner tube and the outer tube, so that the air of multiple air outlet holes release can with multiple guide gas hole release zinc vapour, realize the efficient preparation of zinc oxide in mixing cavity realizes sufficient mixing, and through the heating of the inside of mixing cavity that electric heating ring can be set up, prevents the temperature reduction influence preparation effect, and the arc cover is set up and is set up exhaust port on the arc cover, so that the zinc vapour of a small amount of unoxidized can be in through the narrow exhaust port, and the oxygen in the air contacts and oxidizes, and the rotating fan blade promotes the further mixing of mixed gas in the arc cover inside, can further improve the preparation efficiency of zinc oxide.

Description

Technical Field

[0001] This utility model belongs to the field of zinc oxide production technology, and in particular relates to an oxygen injection calcination device for zinc oxide production. Background Technology

[0002] Zinc oxide is produced by heating zinc ingots obtained through electrolysis to 600–700°C until molten, then placing them in a high-temperature resistant crucible and allowing them to melt and vaporize at 1250–1300°C. Hot air is then introduced for oxidation. The resulting zinc oxide is cooled, separated by cyclone separation, and the fine particles are collected using a cloth bag to obtain the finished zinc oxide product. Zinc oxide is a commonly used chemical additive, widely used in the manufacture of plastics, silicate products, synthetic rubber, lubricants, paints, coatings, ointments, adhesives, food, batteries, flame retardants, and other products. Zinc oxide has a large band gap and exciton binding energy, high transparency, and excellent room-temperature luminescence properties, and is used in semiconductor products such as liquid crystal displays, thin-film transistors, and light-emitting diodes. A search revealed that patent CN215766470U discloses an oxygen injection calcination device for zinc oxide production. This device overcomes the shortcomings of small contact area between steam zinc and oxygen, hindering rapid and effective reaction; temperature differences within the reaction chamber affecting reaction efficiency; and insufficient oxygen content in the air limiting the reaction. The device includes an oxygen injection chamber with a booster pump installed on its bottom inner side. A three-way pipe is connected to the inlet end of the booster pump, and a heater is installed on top of the booster pump. An insulated reaction chamber is installed on top of the oxygen injection chamber, with an inlet pipe welded to its bottom inner side. A clamp is screwed into the inner side of the insulated reaction chamber, and a feed pipe is clamped to the inner side of the clamp. A heating pipe is also installed on the bottom inner side of the insulated reaction chamber.

[0003] However, during actual use, the applicant found that the zinc vapor released from the vent at the top of the feed pipe would directly enter the collection hood and be discharged under the influence of the upward airflow inside the heat-insulating reaction chamber, thus failing to achieve an effective oxidation reaction and reducing the production efficiency of zinc oxide. In view of this, we propose an oxygen injection calcination device for zinc oxide production. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to an oxygen injection calcination device for zinc oxide production, comprising a furnace body. A partition is fixedly installed inside the furnace body. A first air inlet pipe is fixedly installed through the side wall of the furnace body above the partition, and a second air inlet pipe is fixedly installed through the side wall of the furnace body below the partition. An electric heating box is fixedly installed at the bottom inside the furnace body. One end of the second air inlet pipe, located inside the furnace body, is fixedly connected to the air inlet end of the electric heating box. An inner cylinder is fixedly connected to the top of the partition. The air outlet end of the electric heating box communicates with the interior of the inner cylinder through a connecting pipe. The upper peripheral wall of the inner cylinder... An air outlet is provided at the top of the inner cylinder, and an outer cylinder is fitted around the outer cylinder. The first air inlet pipe is located inside the furnace body and is connected to the interior of the outer cylinder. A mixing chamber and a gas passage are provided between the inner cylinder and the outer cylinder. Air guide holes are provided on the inner walls of the outer cylinder on both the upper and lower sides of the mixing chamber. An electric heating ring is fixedly connected to the inner side wall of the outer cylinder. An arc-shaped cover is provided at the top of the outer cylinder, and an exhaust hole is provided on the arc-shaped cover. A rotating shaft is rotatably connected to the top of the inner cylinder, and a fan blade is fitted and fixed at the upper end of the rotating shaft. An air guide pipe is fixedly provided at the top of the furnace body.

[0005] Preferably, the arc-shaped cover has a plurality of evenly spaced exhaust holes.

[0006] Preferably, the fan blades are disposed on the inner side of the arc-shaped cover.

[0007] Preferably, the bottom of the outer cylinder is fixedly connected to the top of the partition.

[0008] Preferably, the air outlets on the inner cylinder peripheral sidewall are arranged in a ring array, and the air guide holes on the outer cylinder inner wall are arranged in a ring array.

[0009] Preferably, a furnace door is provided on the outer wall of the front side of the furnace body.

[0010] This utility model has the following beneficial effects: This invention relates to an oxygen injection calcination device for zinc oxide production. A mixing chamber is provided between the inner and outer cylinders, allowing air released from multiple vent holes to fully mix with zinc vapor released from multiple guide holes, achieving efficient zinc oxide production. An electric heating ring heats the interior of the mixing chamber, preventing temperature drops from affecting the production effect. An arc-shaped hood with exhaust holes allows a small amount of unoxidized zinc vapor to oxidize upon contact with oxygen in the air as it passes through the narrow exhaust holes. The mixed gas entering the arc-shaped hood drives fan blades, further promoting mixing and improving zinc oxide production efficiency. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the external structure of an oxygen injection calcination device for zinc oxide production according to this utility model; Figure 2 This is a schematic diagram of the internal structure of an oxygen injection calcination device for zinc oxide production according to this utility model; Figure 3 This utility model relates to an oxygen injection calcination device for zinc oxide production. Figure 2 Enlarged view of the structure at point A in the middle.

[0013] The attached diagram lists the components represented by each number as follows: 1. Furnace body; 11. First air inlet pipe; 12. Second air inlet pipe; 13. Air guide pipe; 14. Furnace door; 15. Partition plate; 2. Heating box; 21. Connecting pipe; 3. Inner cylinder; 31. Air outlet; 4. Outer cylinder; 41. Mixing chamber; 42. Air guide hole; 43. Gas passage; 44. Arc-shaped cover; 441. Exhaust hole; 5. Heating ring; 6. Rotating shaft; 7. Fan blade. Detailed Implementation

[0014] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3 As shown, this utility model provides a technical solution: An oxygen injection calcination device for zinc oxide production includes a furnace body 1. A partition 15 is fixedly installed inside the furnace body 1. A first air inlet pipe 11 is fixedly installed through the side wall of the furnace body 1 above the partition 15. A second air inlet pipe 12 is fixedly installed through the side wall of the furnace body 1 below the partition 15. An electric heating box 2 is fixedly installed at the bottom inside the furnace body 1. The electric heating box 2 contains heating wires to heat the air passing through it. One end of the second air inlet pipe 12, located inside the furnace body 1, is fixedly connected to the air inlet end of the electric heating box 2. The inner cylinder 3 is fixedly connected to the top of the partition 15. The air outlet of the electric heating box 2 is connected to the interior of the inner cylinder 3 through the connecting pipe 21. Air outlet holes 31 are opened on the upper peripheral wall of the inner cylinder 3. Several air outlet holes 31 are arranged in a ring array on the peripheral wall of the inner cylinder 3. An outer cylinder 4 is fitted around the inner cylinder 3. The bottom of the outer cylinder 4 is fixedly connected to the top of the partition 15. One end of the first air inlet pipe 11 located inside the furnace body 1 is connected to the interior of the outer cylinder 4. A mixing chamber 41 and a gas mixing chamber are provided between the inner cylinder 3 and the outer cylinder 4. The mixing chamber 41 has a mixing channel 43. Air guide holes 42 are provided on the inner walls of the outer cylinders 4 on both sides. Several air guide holes 42 are arranged in a ring array on the inner wall of the outer cylinder 4. A heating ring 5 is fixedly connected to the inner wall of the outer cylinder 4. The heating ring 5 contains a heating wire that generates heat to heat the interior of the mixing chamber 41, thus ensuring the preparation temperature of zinc oxide. A gas guide pipe 13 is fixedly installed on the top of the furnace body 1. A furnace door 14 is installed on the outer wall of the front side of the furnace body 1. The furnace door 14 can seal the operating window on the front side of the furnace body 1. By opening the furnace door 14, maintenance operations can be performed on the equipment inside the furnace body 1 through the operating window. Because a mixing chamber 41 is provided between the inner cylinder 3 and the outer cylinder 4, the air released from the multiple air outlets 31 can be fully mixed with the zinc vapor released from the multiple air guide holes 42 in the mixing chamber 41, achieving efficient preparation of zinc oxide. Furthermore, the heating ring 5 can heat the interior of the mixing chamber 41, preventing temperature drops from affecting the preparation effect.

[0016] An arc-shaped cover 44 is provided on the top of the outer cylinder 4, and an exhaust hole 441 is provided on the arc-shaped cover 44. Several exhaust holes 441 are evenly provided on the arc-shaped cover 44. A rotating shaft 6 is rotatably connected to the top of the inner cylinder 3. A fan blade 7 is sleeved and fixed at the upper end of the rotating shaft 6. The fan blade 7 is located inside the arc-shaped cover 44. When the mixed gas enters the inside of the arc-shaped cover 44 from the gas channel 43, it can drive the fan blade 7 to rotate. Through the arc-shaped cover 44 and the exhaust hole 441 provided on the arc-shaped cover 44, a small amount of unoxidized zinc vapor can come into contact with oxygen in the air and undergo an oxidation reaction when passing through the narrow exhaust hole 441. The mixed gas entering the inside of the arc-shaped cover 44 can drive the fan blade 7 to rotate, thereby promoting further mixing of the mixed gas inside the arc-shaped cover 44 through the rotating fan blade 7, which can further improve the preparation efficiency of zinc oxide.

[0017] Working principle: During use, zinc vapor and air are introduced into the first air inlet pipe 11 and the second air inlet pipe 12, respectively. The air entering the second air inlet pipe 12 is heated by the electric heating box 2 and then transported to the inner cylinder 3 through the connecting pipe 21. It is then released into the mixing chamber 41 through multiple air outlets 31. At the same time, the zinc vapor entering the outer cylinder 4 through the first air inlet pipe 11 is released into the mixing chamber 41 through the air guide holes 42 on both sides of the air outlets 31. The gas released from these three points can accelerate the flow of gas inside the mixing chamber 41, enabling the zinc vapor and air to be efficiently mixed in the mixing chamber 41. During this process, the electric heating ring 5 can... The inside of the mixing chamber 41 is heated by electricity to ensure the temperature for zinc vapor oxidation. The mixed gas after the reaction can enter the inside of the arc-shaped cover 44 through the gas channel 43. During this process, the gas can drive the fan blade 7 to rotate. The fan blade 7 can turbulent the gas inside the arc-shaped cover 44, so that the gas can be mixed more evenly. During the process of the gas passing through the exhaust hole 441, a small amount of zinc vapor can react with oxygen in the air to achieve oxidation reaction in the narrow exhaust hole 441. The resulting zinc oxide gas can enter the upper part of the furnace body 1 through the exhaust hole 441, and be discharged through the gas guide pipe 13 and collected after cooling.

[0018] The text shows and describes the basic principles, main features and advantages of this utility model. The standard parts used in this utility model can all be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part can all adopt conventional methods such as bolts, rivets and welding that are mature in the prior art. The machinery, parts and equipment can all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. This part will not be described in detail in the text.

[0019] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0020] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.

Claims

1. An oxygen injection calcination device for zinc oxide production, comprising a furnace body (1), characterized in that: A partition (15) is fixedly installed inside the furnace body (1). A first air inlet pipe (11) is fixedly installed through the side wall of the furnace body (1) above the partition (15). A second air inlet pipe (12) is fixedly installed through the side wall of the furnace body (1) below the partition (15). An electric heating box (2) is fixedly installed at the bottom inside the furnace body (1). One end of the second air inlet pipe (12) inside the furnace body (1) is fixedly connected to the air inlet end of the electric heating box (2). An inner cylinder (3) is fixedly connected to the top of the partition (15). The air outlet end of the electric heating box (2) is connected to the inside of the inner cylinder (3) through a connecting pipe (21). An air outlet hole (31) is opened on the upper peripheral side wall of the inner cylinder (3). The outer sleeve of the inner cylinder (3) An outer cylinder (4) is provided. The first air inlet pipe (11) is located inside the furnace body (1) and is connected to the interior of the outer cylinder (4). A mixing chamber (41) and a gas passage (43) are provided between the inner cylinder (3) and the outer cylinder (4). A gas guide hole (42) is provided on the inner wall of the outer cylinder (4) on both the upper and lower sides of the mixing chamber (41). An electric heating ring (5) is fixedly connected to the inner side wall of the outer cylinder (4). An arc-shaped cover (44) is provided on the top of the outer cylinder (4). An exhaust hole (441) is provided on the arc-shaped cover (44). A rotating shaft (6) is rotatably connected to the top of the inner cylinder (3). A fan blade (7) is sleeved and fixed at the upper end of the rotating shaft (6). A gas guide pipe (13) is fixedly provided on the top of the furnace body (1).

2. The oxygen injection calcination equipment for zinc oxide production according to claim 1, characterized in that, The arc-shaped cover (44) has several evenly spaced exhaust holes (441).

3. The oxygen injection calcination equipment for zinc oxide production according to claim 1, characterized in that, The fan blade (7) is located on the inside of the arc-shaped cover (44).

4. The oxygen injection calcination equipment for zinc oxide production according to claim 1, characterized in that, The bottom of the outer cylinder (4) is fixedly connected to the top of the partition (15).

5. The oxygen injection calcination equipment for zinc oxide production according to claim 1, characterized in that, The inner cylinder (3) has several air outlets (31) arranged in a ring array on its circumferential sidewall, and the outer cylinder (4) has several air guide holes (42) arranged in a ring array on its inner wall.

6. The oxygen injection calcination equipment for zinc oxide production according to claim 1, characterized in that, A furnace door (14) is provided on the outer wall of the front side of the furnace body (1).

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