Rapid cooling device for high-concentration zinc oxide dust

Abstract

The utility model discloses a high-concentration zinc oxide dust rapid cooling device. Relates to the field of zinc oxide production equipment. Comprising a first cooling tank and a second cooling tank, a feeding pipe is arranged at the top of the first cooling tank, a discharging pipe is arranged in the second cooling tank, and the bottom of the first cooling tank is communicated with the bottom of the second cooling tank through a pipeline; the top of the first cooling tank is further provided with a first cold air pipe, the lower portion of the second cooling tank is provided with a second cold air pipe, the first cold air pipe is used for conveying cold air downwards, and the second cold air pipe is used for conveying cold air upwards. The inner diameter of the first cooling tank is larger than that of the second cooling tank. According to the method, the cooling uniformity of the zinc oxide powder can be improved, so that the cooling effect is effectively improved.

Description

Technical Field

[0001] This application relates to the field of zinc oxide production equipment, specifically to a rapid cooling device for high-concentration zinc oxide dust. Background Technology

[0002] The dry process for preparing zinc oxide involves directly feeding zinc blocks into a furnace and heating them to melt and vaporize them. Air is then introduced into the upper part of the furnace to react with oxygen in the air to produce zinc oxide. The high-temperature flue gas containing zinc oxide is then cooled down through pipes.

[0003] Chinese patent document CN213657549U discloses a zinc oxide cooler, specifically disclosing a first housing, a first pipeline, and a second pipeline. The first pipeline is symmetrically installed on both sides of the first housing. An air inlet is located at the top of the first housing, and air outlets are symmetrically located at the bottom. Multiple fins are evenly distributed on the first housing. The first pipeline includes a main pipeline and an outer pipeline. One end of the main pipeline is connected to the air outlet by screws, and multiple grooves are evenly distributed on the inner wall of the main pipeline. The outer pipeline is welded to the main pipeline, and reinforcing plates are symmetrically arranged at both ends of the outer pipeline, which are welded to the main pipeline. One end of the outer pipeline has a water inlet, and the other end has a water outlet. This patent employs simultaneous cooling with dual pipelines, improving cooling efficiency and reducing space occupation.

[0004] However, the rapid flow of zinc oxide in the pipeline results in poor cooling effect. Furthermore, the zinc oxide in contact with the inner wall of the pipeline cools faster, while the zinc oxide in the center of the pipeline cools slower, leading to poor temperature uniformity. Utility Model Content

[0005] To overcome the problem of poor cooling effect of zinc oxide in the prior art, this application provides a rapid cooling device for high-concentration zinc oxide dust.

[0006] This application adopts the following technical solution: a rapid cooling device for high-concentration zinc oxide dust, including a first cooling tank and a second cooling tank, wherein the top of the first cooling tank is provided with a feed pipe, the second cooling tank is provided with a discharge pipe, and the bottom of the first cooling tank and the bottom of the second cooling tank are connected by a pipe.

[0007] The top of the first cooling tank is also provided with a first cold air pipe, and the bottom of the second cooling tank is provided with a second cold air pipe. The first cold air pipe is used to deliver cold air downwards, and the second cold air pipe is used to deliver cold air upwards.

[0008] The inner diameter of the first cooling tank is larger than the inner diameter of the second cooling tank.

[0009] Optionally, both the bottom of the first cooling tank and the bottom of the second cooling tank are provided with support legs.

[0010] Optionally, a baffle is provided on the upper inner side of the first cooling tank. The baffle is in the shape of a downwardly concave arc. One end of the feed pipe inside the first cooling tank is located below the baffle, and the outlet of the first cold air pipe is located above the baffle.

[0011] A plurality of first air distribution pipes are provided through the partition plate, with one end of the first air distribution pipe located above the partition plate and the other end of the first air distribution pipe located below the partition plate.

[0012] Optionally, the first air distribution pipe near the feed pipe extends along the axial direction of the first cooling tank, while the first air distribution pipe away from the feed pipe is inclined in the direction pointing towards the inner wall of the first cooling tank.

[0013] Optionally, a gas collecting ring is provided on the lower inner side of the second cooling tank. The outer wall of the gas collecting ring is in contact with the inner wall of the second cooling tank and is connected to the second cooling pipe. A plurality of second air distribution pipes are provided on the inner wall of the gas collecting ring.

[0014] Optionally, one end of the second air distribution pipe is connected to the air collection ring, and the other end of the second air distribution pipe extends toward the top of the second cooling tank;

[0015] Several of the second air distribution pipes point to the axis of the second cooling tank, and the angles between several of the second air distribution pipes and the horizontal plane are the same.

[0016] Compared with the prior art, this application achieves different flow rates of zinc oxide powder by differentiating the inner diameters of the first cooling tank, the pipe, and the second cooling tank. Furthermore, by using different air supply methods for the first and second cooling pipes, the separation, diffusion, and mixing of zinc oxide powder are achieved, thereby improving the uniformity of cooling the zinc oxide powder and effectively enhancing the cooling effect. Attached Figure Description

[0017] Figure 1 This is a schematic perspective view of this application;

[0018] Figure 2 This is a cross-sectional view of the internal structure of the first cooling tank;

[0019] Figure 3 This is a reference diagram showing the assembly state of the partition and the feed pipe;

[0020] Figure 4 This is a cross-sectional view of the internal structure of the second cooling tank;

[0021] Figure 5 This is a reference diagram showing the assembly state of the gas collecting ring and the second cooling pipe;

[0022] In the diagram: 1. First cooling tank; 11. Feed pipe; 12. First cold air pipe; 13. Support leg; 14. Baffle plate; 15. First air distribution pipe; 2. Second cooling tank; 21. Discharge pipe; 22. Second cold air pipe; 23. Air collecting ring; 24. Second air distribution pipe; 3. Pipeline. Detailed Implementation

[0023] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0024] like Figures 1-5 As shown, a rapid cooling device for high-concentration zinc oxide dust includes a first cooling tank 1 and a second cooling tank 2. Support legs 13 are provided at the bottom of both the first cooling tank 1 and the bottom of the second cooling tank 2 to ensure that both tanks are reliably fixed. A feed pipe 11 is provided at the top of the first cooling tank 1, and a discharge pipe 21 is provided inside the second cooling tank 2. The bottoms of the first cooling tank 1 and the second cooling tank 2 are connected by a pipe 3. A first cold air pipe 12 is also provided at the top of the first cooling tank 1, and a second cold air pipe 22 is provided at the bottom of the second cooling tank 2. The first cold air pipe 12 is used to deliver cold air downwards, and the second cold air pipe 22 is used to deliver cold air upwards. The inner diameter of the first cooling tank 1 is larger than the inner diameter of the second cooling tank 2.

[0025] The cold air blown out by the first cold air pipe 12 moves downward and enters the bottom of the second cooling tank 2 through the pipe 3. After merging with the cold air blown out by the second cold air pipe 22, it moves upward and is discharged outward through the discharge pipe 21. In this way, with the cooperation of the first cold air pipe 12 and the second cold air pipe 22, a cold air flow can be formed in the first cooling tank 1, the pipe 3 and the second cooling tank 2. In this way, zinc oxide dust will be carried by the cold air flow from the first cooling tank 1 into the pipe 3, from the pipe 3 into the second cooling tank 2, from the second cooling tank 2 into the discharge pipe and discharged outward. Specifically, due to the larger inner diameter of the first cooling tank 1, the flow rate of zinc oxide dust decreases after entering the first cooling tank 1, and it diffuses in the second cooling tank 2. When the zinc oxide dust enters the pipe 3, the inner diameter of the pipe 3 is relatively smaller than that of the first cooling tank 1, and the flow rate of the zinc oxide dust increases relatively. The zinc oxide dust will also create a tangling effect during its entry into the pipe 3, that is, a velocity difference will be generated between the zinc oxide powder near the pipe opening and the zinc oxide powder far from the pipe opening, thereby promoting the mixing of zinc oxide powders cooled to different temperatures. At this time, after the zinc oxide powder enters the second cooling tank 2 through the pipe 3, the cold air blown out by the second cold air pipe 22 can cool it a second time. By differentiating the inner diameters of the first cooling tank 1, the pipe 3, and the second cooling tank 2, the flow rate of the zinc oxide powder changes, thereby achieving the separation, diffusion, and mixing of the zinc oxide powder, improving the uniformity of cooling the zinc oxide powder, and effectively improving the cooling effect.

[0026] A baffle 14 is provided on the upper inner side of the first cooling tank 1. The baffle 14 is a downwardly concave arc shape. One end of the feed pipe 11 inside the first cooling tank 1 is located below the baffle 14, and the outlet of the first cooling air pipe 12 is located above the baffle 14. Several first air distribution pipes 15 are passed through the baffle 14. One end of the first air distribution pipe 15 is located above the baffle 14, and the other end of the first air distribution pipe 15 is located below the baffle 14. The first air distribution pipes 15 near the feed pipe 11 extend along the axial direction of the first cooling tank 1, and the first air distribution pipes 15 away from the feed pipe 11 are inclined towards the inner wall of the first cooling tank 1.

[0027] When the cold air is discharged from the first cold air pipe 12, it first quickly fills the area above the partition 14, and then flows through the first air distribution pipe 15 to the area below the partition 14. Furthermore, the first air distribution pipe 15 near the feed pipe 11 extends along the axis of the first cooling tank 1, meaning that the first air distribution pipe 15 at this position is parallel to the discharge direction of the feed pipe 11. This allows the first air distribution pipe 15 at this position to envelop the zinc oxide powder just discharged from the discharge pipe, achieving rapid initial cooling of the zinc oxide powder. The first air distribution pipe 15 away from the feed pipe 11 is set at an angle. Thus, the cold air discharged through the first air distribution pipe 15 at this position flows downwards and impacts the inner wall of the first cooling tank 1, forming a baffle and ultimately contacting the zinc oxide powder, achieving a dispersing effect. The dispersing direction is from all sides towards the axis of the first cooling tank 1, causing the zinc oxide powder to flow in a turbulent state within the first cooling tank 1, maximizing the cooling effect on the zinc oxide powder.

[0028] A gas collecting ring 23 is provided on the lower inner side of the second cooling tank 2. The outer wall of the gas collecting ring 23 is in contact with the inner wall of the second cooling tank 2 and is connected to the second cooling air pipe 22. Several second air distribution pipes 24 are provided on the inner wall of the gas collecting ring 23. One end of the second air distribution pipe 24 is connected to the gas collecting ring 23, and the other end of the second air distribution pipe 24 extends toward the top of the second cooling tank 2. Several second air distribution pipes 24 all point to the axis of the second cooling tank 2, and the angles between several second air distribution pipes 24 and the horizontal plane are the same.

[0029] When zinc oxide powder enters the second cooling tank 2 from pipe 3, it passes through the gas collecting ring 23. Since the cold air blown out by several second air distribution pipes 24 will converge at the axis of the second cooling tank 2, the zinc oxide powder can be dispersed again during its upward movement. The dispersion direction is from the axis of the second cooling tank 2 outwards. In this way, the zinc oxide powder that is dispersed again can be cooled at the end by the cold air discharged from the second cold air pipe 22, which significantly improves the cooling effect.

[0030] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A rapid cooling device for high-concentration zinc oxide dust, characterized in that, It includes a first cooling tank (1) and a second cooling tank (2). The top of the first cooling tank (1) is provided with a feed pipe (11), and the second cooling tank (2) is provided with a discharge pipe (21). The bottom of the first cooling tank (1) and the bottom of the second cooling tank (2) are connected by a pipe (3). The top of the first cooling tank (1) is also provided with a first cold air pipe (12), and the lower part of the second cooling tank (2) is provided with a second cold air pipe (22). The first cold air pipe (12) is used to deliver cold air downwards, and the second cold air pipe (22) is used to deliver cold air upwards. The inner diameter of the first cooling tank (1) is larger than the inner diameter of the second cooling tank (2).

2. The rapid cooling device for high-concentration zinc oxide dust according to claim 1, characterized in that, Both the bottom of the first cooling tank (1) and the bottom of the second cooling tank (2) are provided with support legs (13).

3. The rapid cooling device for high-concentration zinc oxide dust according to claim 1, characterized in that, The upper inner side of the first cooling tank (1) is provided with a partition (14), the partition (14) is a downward concave arc shape, one end of the feed pipe (11) inside the first cooling tank (1) is located below the partition (14), and the air outlet of the first cold air pipe (12) is located above the partition (14). A plurality of first air distribution pipes (15) are provided on the partition (14), one end of the first air distribution pipe (15) is located above the partition (14), and the other end of the first air distribution pipe (15) is located below the partition (14).

4. The rapid cooling device for high-concentration zinc oxide dust according to claim 3, characterized in that, The first air distribution pipe (15) near the feed pipe (11) extends along the axis of the first cooling tank (1), and the first air distribution pipe (15) away from the feed pipe (11) is inclined in the direction of pointing towards the inner wall of the first cooling tank (1).

5. The rapid cooling device for high-concentration zinc oxide dust according to claim 3, characterized in that, The lower inner side of the second cooling tank (2) is provided with a gas collecting ring (23). The outer wall of the gas collecting ring (23) is in contact with the inner wall of the second cooling tank (2) and is connected to the second cold air pipe (22). A plurality of second air distribution pipes (24) are provided on the inner wall of the gas collecting ring (23).

6. The rapid cooling device for high-concentration zinc oxide dust according to claim 5, characterized in that, One end of the second air distribution pipe (24) is connected to the air collection ring (23), and the other end of the second air distribution pipe (24) extends toward the top of the second cooling tank (2); Several of the second air distribution pipes (24) point to the axis of the second cooling tank (2), and the angles between several of the second air distribution pipes (24) and the horizontal plane are the same.

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