Drying kiln with screening function

Abstract

The utility model belongs to the technical field of aluminum fluoride production, and particularly relates to a drying kiln with a screening function. Comprising a rotary drying kiln body, a discharging cover is arranged at the discharging tail end of the rotary drying kiln body, the discharging tail end, stretching into the discharging cover, of the rotary drying kiln body is connected with a screen drum, the screen drum and the rotary drying kiln body are coaxially and rotatably arranged, and screen holes are formed in the side wall of the screen drum; according to the rotary drying kiln, the screen drum is connected to the discharging tail end of the rotary drying kiln body, aluminum fluoride dried by the rotary drying kiln is screened by the screen drum and then discharged through the discharging cover, large-particle materials are reduced, and the uniformity of output materials is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum fluoride production, in particular to a drying kiln with a screening function. Background Art

[0002] Aluminum fluoride is an inorganic substance with the chemical formula AlF3, which is colorless or white crystalline. It is insoluble in water, acids and alkalis. It has very stable properties and can be hydrolyzed when heated. It is mainly used in aluminum smelting production to reduce the melting point and improve the conductivity of the electrolyte. It is used as an inhibitor for the secondary fermentation in alcohol production. It is also used as a flux for ceramic glazes and enamel glazes and a component of glaze medicines. It can also be used as a flux for smelting non-ferrous metals.

[0003] In industrial production of aluminum fluoride, a neutralization reaction between fluosilicic acid solution and aluminum hydroxide is used to produce aluminum fluoride solution, which is then crystallized and dried to obtain semi-finished or finished products. Hot air generated by natural gas combustion directly or indirectly (a combination of the two methods) contacts the aluminum fluoride paste for drying to ensure that the loose bulk density is greater than 0.7t / m³. In the prior art, the aluminum fluoride after drying in a rotary drying kiln is directly discharged through a discharge hood without screening it as Figure 1-2 shown.

[0004] Therefore, this application proposes a drying kiln with a screening function. Content of the Utility Model

[0005] The purpose of the utility model is to propose a drying kiln with a screening function, which can screen the dried aluminum fluoride, reduce large-particle materials, and increase the uniformity of the output materials.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A drying kiln with a screening function includes a rotary drying kiln body. A discharge hood is arranged at the discharging end of the rotary drying kiln body. The discharging end of the rotary drying kiln body extending into the discharge hood is connected with a screening cylinder. The screening cylinder is coaxially and rotatably arranged with the rotary drying kiln body, and screening holes are formed in the side wall of the screening cylinder.

[0008] Further, the screening cylinder includes an outer baffle, a screening plate and an inner baffle. The screening plate is arranged between the inner baffle and the outer baffle, and the inner baffle is connected with the discharging end of the rotary drying kiln body.

[0009] Further, the rotary drying kiln body and the discharge hood are connected by welding.

[0010] Further, a number of hanging chains are arranged inside the screening plate.

[0011] Further, the width of the screening cylinder is 720mm.

[0012] Furthermore, both the length and width of the sieve cylinder are smaller than those of the discharge hood.

[0013] The utility model has at least one of the following beneficial effects:

[0014] In the utility model, a sieve cylinder is connected and arranged at the discharge end of the rotary drying kiln body. After the aluminum fluoride dried by the rotary drying kiln passes through the sieve cylinder for screening and then discharges through the discharge hood, large particle materials are reduced, and the uniformity of the output materials is increased.

[0015] A number of hanging chains are arranged inside the sieve plate. The number of hanging chains is set according to needs. During the drying process, the hanging chains are used to break up massive materials and improve the thermal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The current situation diagram of the discharge end of the rotary drying kiln in the prior art;

[0017] Figure 2 For Figure 1 the left view;

[0018] Figure 3 is the schematic structural diagram of the sieve cylinder;

[0019] Figure 4 is the schematic structural diagram of the utility model;

[0020] Figure 5 is the left view of the utility model.

[0021] In the figure, 1 - rotary drying kiln body; 2 - discharge hood; 3 - sieve cylinder; 4 - sieve holes; 5 - outer baffle; 6 - sieve plate; 7 - inner baffle; 8 - hanging chain. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] As Figure 1-5 shown, in order to make the purpose, technical solution and advantages of the utility model clearer, the following further details the utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Embodiment

[0023] A drying kiln with a screening function includes a rotary drying kiln body 1. A discharge hood 2 is arranged at the discharge end of the rotary drying kiln 1 body. A sieve cylinder 3 is connected and arranged at the discharge end of the rotary drying kiln body 1 extending into the discharge hood 2. The sieve cylinder 3 is coaxially and rotatably arranged with the rotary drying kiln body 1. Sieve holes 4 are formed on the side wall of the sieve cylinder 3. In the utility model, a sieve cylinder is connected and arranged at the discharge end of the rotary drying kiln body. After the aluminum fluoride dried by the rotary drying kiln passes through the sieve cylinder for screening and then discharges through the discharge hood, large particle materials are reduced, and the uniformity of the output materials is increased.

[0024] Furthermore, the screening cylinder 3 includes an outer baffle 5, a screening plate 6, and an inner baffle 7. The screening plate 6 is arranged between the inner baffle 7 and the outer baffle 5. The inner baffle 7 is connected to the discharging end of the rotary drying kiln body 1, and the screening cylinder 3 rotates together with the rotary drying kiln body 1.

[0025] Furthermore, the rotary drying kiln body 1 and the discharging hood 2 are connected by welding, which is convenient for on-site construction.

[0026] Furthermore, a number of hanging chains 8 are arranged inside the screening plate 6. In this embodiment, 12 hanging chains are provided. During the drying process, the hanging chains are used to break up lumpy materials and improve the thermal efficiency.

[0027] Furthermore, the width of the screening cylinder 3 is 720 mm. The length and width of the screening cylinder 3 are both smaller than the length and width of the discharging hood 2, which is convenient for discharging.

[0028] Although the present invention has been described herein with reference to a number of illustrative embodiments of the present invention, it should be understood that those skilled in the art can design many other modifications and embodiments that will fall within the scope of the principles disclosed in this application. More specifically, within the scope of the disclosure of this application, the drawings, and the claims, various variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A drying kiln with a screening function, comprising a rotary drying kiln body (1), and a discharge hood (2) is arranged at the discharge end of the rotary drying kiln body (1), and is characterized in that: At the discharging end of the rotary drying kiln body (1) extending into the discharging hood (2), a screening cylinder (3) is connected and arranged. The screening cylinder (3) is coaxially rotatably arranged with the rotary drying kiln body (1), and screening holes (4) are formed in the side wall of the screening cylinder (3).

2. The drying kiln with a screening function according to claim 1, characterized in that: The screening cylinder (3) includes an outer baffle (5), a screening plate (6) and an inner baffle (7). The screening plate (6) is arranged between the inner baffle (7) and the outer baffle (5), and the inner baffle (7) is connected to the discharging end of the rotary drying kiln body (1).

3. The drying kiln with a screening function according to claim 1, characterized in that: The rotary drying kiln body (1) and the discharging hood (2) are connected by welding.

4. The drying kiln with a screening function according to claim 2, characterized in that: A number of hanging chains (8) are arranged inside the screening plate (6).

5. The drying kiln with a screening function according to claim 1, characterized in that: The width of the screening cylinder (3) is 720 mm.

6. The drying kiln with a screening function according to claim 1, characterized in that: The length and width of the screening cylinder (3) are both smaller than the length and width of the discharging hood (2).

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