Aluminum fluoride mother liquor fine material recovery device

Abstract

The utility model belongs to the technical field of aluminum fluoride production, and particularly relates to an aluminum fluoride mother liquor fine material recovery device. Comprising a settling tank, a settling tank pit and a tank rake stirring device, a bridge is arranged at the top of the settling tank, the settling tank pit is arranged at the bottom of the settling tank and communicated with the settling tank, overflow pipes and a feeding pipe are arranged on the upper portion of the side wall of the settling tank, the number of the overflow pipes is two, settling liquid waste conveying pumps are arranged on the two overflow pipes, and a discharging valve is arranged on the discharging pipe. A pit conveying pump is arranged on the discharging pipe, a groove rake stirring device is arranged in a space formed by the settling tank and the settling tank pit, the groove rake stirring device penetrates through the bridge frame to be connected with a transmission device, and the transmission device is connected with an electric cabinet and a hydraulic station; the residual fine materials in the aluminum fluoride mother liquor can be settled and recycled, the yield of products can be improved, and the content of aluminum fluoride in waste water is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum fluoride production, especially an aluminum fluoride mother liquor fine material recovery device. Background Art

[0002] In the existing industrial production of aluminum fluoride, reaction occurs between fluosilicic acid and aluminum hydroxide as raw materials to produce aluminum fluoride, and the obtained product contains silica gel, which mostly needs to be subjected to subsequent crystallization, filtration, separation, and sedimentation treatments to obtain aluminum fluoride trihydrate crystals.

[0003] Currently, the aluminum fluoride wastewater has not been fully sedimented, and the content of aluminum fluoride in the wastewater is relatively high. If it is not treated and discharged, on the one hand, it will cause waste of materials, and on the other hand, the pollution is relatively serious.

[0004] Therefore, this application proposes an aluminum fluoride mother liquor fine material recovery device. Content of the Utility Model

[0005] The purpose of the utility model is to propose an aluminum fluoride mother liquor fine material recovery device, which can sediment and recover the remaining fine materials in the aluminum fluoride mother liquor, can improve the product yield, and reduce the content of aluminum fluoride in the wastewater.

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

[0007] The aluminum fluoride mother liquor fine material recovery device includes a sedimentation tank, a sedimentation tank pit, and a tank rake stirring device. A bridge is arranged on the top of the sedimentation tank. The sedimentation tank pit is arranged at the bottom of the sedimentation tank and is connected to the sedimentation tank. An overflow pipe and a feed pipe are arranged on the upper part of the side wall of the sedimentation tank. There are two overflow pipes, and sedimented clear liquid waste conveying pumps are arranged on both overflow pipes. The Q of the sedimented clear liquid waste conveying pump is 65m 3 / h, H = 45m. A discharge pipe is arranged at the bottom of the sedimentation tank pit. A discharge valve is arranged on the discharge pipe. A pit conveying pump is arranged on the discharge pipe. The Q of the pit conveying pump is 30m 3 / h, H = 40m, frequency conversion, and corresponding drinking water tanks and flow meters are configured. The sedimentation tank is of a steel-concrete structure, and the inner wall of the sedimentation tank is lined with rubber, and the bottom is lined with bricks;

[0008] A tank rake stirring device is arranged in the space formed by the sedimentation tank and the sedimentation tank pit. The tank rake stirring device passes through the bridge and is connected to a transmission device, and the transmission device is connected to an electric control box and a hydraulic station.

[0009] Further, the sedimentation tank pit is arranged in a funnel shape with a wider top and a narrower bottom, and a liquid level gauge is arranged inside.

[0010] Furthermore, the trough rake stirring device includes a shaft, a long rake frame, a short rake frame and a secondary rake. The shaft is connected to the transmission device. The long rake frame, the short rake frame and the secondary rake are arranged on the shaft. The secondary rake is arranged at the bottom of the sump of the settling tank. The long rake frame and the short rake frame are arranged alternately, and the long rake frame and the short rake frame are arranged in a triangular structure. The bottom inclination angles of the long rake frame and the short rake frame are the same as the lower inclination angle of the sump of the settling tank.

[0011] Furthermore, the long rake frame and the short rake frame include a flanged channel steel and a steel pipe. The flanged channel steel is arranged obliquely, the steel pipe is arranged horizontally, and the flanged channel steel and the steel pipe are connected by a connecting rod.

[0012] Furthermore, a flow stabilizing barrel is arranged on the upper part of the shaft. The flow stabilizing barrel is connected to the side wall of the settling tank. The flow stabilizing barrel is connected to the liquid outlet end of the feed pipe. The liquid inlet end of the feed pipe extends out of the side wall of the settling tank. A liquid outlet is arranged at the lower part of the flow stabilizing barrel.

[0013] Furthermore, a deflector is arranged on the shaft below the flow stabilizing barrel. The deflector is arranged in a triangular structure.

[0014] Furthermore, the above liquid level gauges, flow meters and equipment monitoring signals are introduced into the DCS operation control system. Corresponding electric wires and cables are configured according to the equipment requirements. The power supply comes from the existing power distribution system. The motor is selected as the latest standard energy-saving motor to meet the saving requirements, and its circuit principle and control relationship are well known in the art.

[0015] The utility model has at least one of the following beneficial effects:

[0016] When using the fine material recovery device for aluminum fluoride mother liquor of the utility model, the aluminum fluoride wastewater coming in through the feed pipe enters the sump of the settling tank after passing through the flow stabilizing barrel and the deflector for sedimentation. After sedimentation for a period of time, the trough rake stirring device is started. The sedimented aluminum fluoride material enters the bottom of the sump of the settling tank under the action of the trough rake stirring device. After a period of time, the discharge valve on the discharge pipe is opened. The precipitated aluminum fluoride is sent to the crystallization tank for recycling under the action of the delivery pump. Through experimental research, after the washing liquid of the washing system and the aluminum fluoride mother liquor are fully sedimented for 2 - 4 hours, about 0.6% of aluminum fluoride crystallization liquid can be recovered, and its water content is about 75%. This crystallization liquid can be returned to the crystallization tank as crystal seeds for recycling and finally become aluminum fluoride products, ultimately improving the recovery rates of fluorine and aluminum in the products and reducing the content of aluminum fluoride in the wastewater; the clarified liquid at a high position in the settling tank is pumped to the three-stage washing tower for circulating washing under the action of the clarified liquid waste conveying pump through the overflow pipe. A small amount of clarified liquid is pumped to the silica belt filter for use as silica washing water, belt filter silica washing, floor washing, etc., which can improve the recovery rate of the product and reduce the content of aluminum fluoride in the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the utility model;

[0018] Figure 2 This is the top view of the utility model;

[0019] Figure 3 This is the schematic structural view of the long rake frame of the utility model.

[0020] In the figure, 1 - transmission device; 2 - bridge; 3 - steady flow barrel; 4 - guide plate; 5 - feed pipe; 6 - shaft; 7 - long rake frame; 8 - short rake frame; 9 - auxiliary rake; 10 - hydraulic station; 11 - electric control box. Specific embodiments

[0021] As Figures 1-3 shown, in order to make the purpose, technical solutions and advantages of the utility model more clear and understandable, the following further details the utility model in conjunction with the accompanying 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

[0022] The aluminum fluoride mother liquor fine material recovery device includes a sedimentation tank, a sedimentation tank pit, and a tank rake stirring device. A bridge 2 is provided at the top of the sedimentation tank. The sedimentation tank pit is arranged at the bottom of the sedimentation tank and is connected to the sedimentation tank. An overflow pipe and a feed pipe 5 are provided at the upper part of the side wall of the sedimentation tank. A discharge pipe is provided at the bottom of the sedimentation tank pit, and a discharge valve is provided on the discharge pipe;

[0023] A tank rake stirring device is arranged in the space formed by the sedimentation tank and the sedimentation tank pit. The tank rake stirring device passes through the bridge 2 and is connected to the transmission device 1. The transmission device 1 is connected to the electric control box 11 and the hydraulic station 10. Through experimental research, the washing liquid of the washing system and the aluminum fluoride mother liquor can be fully sedimented for 2 - 4 hours, and about 0.6% of the aluminum fluoride crystallization liquid can be recovered. Its water content is about 75%. This crystallization liquid can be returned to the crystallization tank for reuse as crystal seeds and finally become aluminum fluoride products, ultimately improving the fluorine and aluminum recovery rates of the products and reducing the content of aluminum fluoride in the wastewater.

[0024] The sedimentation tank pit is arranged in a funnel shape with a wider top and a narrower bottom, which is convenient for collecting sedimented materials.

[0025] The tank rake stirring device includes a shaft 6, a long rake frame 7, a short rake frame 8, and an auxiliary rake 9. The shaft 6 is connected to the transmission device 1. The long rake frame 7, the short rake frame 8, and the auxiliary rake 9 are arranged on the shaft 6. The auxiliary rake 9 is arranged at the bottom of the sedimentation tank pit. The long rake frame 7 and the short rake frame 8 are arranged alternately, and the long rake frame 7 and the short rake frame 8 are arranged in a triangular structure. The bottom inclination angles of the long rake frame 7 and the short rake frame 8 are the same as the lower inclination angle of the sedimentation tank pit, which is convenient for collecting the materials deposited at the bottom to the bottom of the sedimentation tank pit.

[0026] The long rake frame 7 and the short rake frame 8 include flanged channel steels and steel pipes. The flanged channel steels are arranged obliquely, the steel pipes are arranged horizontally, and the flanged channel steels and the steel pipes are connected by connecting rods.

[0027] A flow stabilizing bucket 3 is arranged on the upper part of the shaft 6. The flow stabilizing bucket 3 is connected to the side wall of the sedimentation tank. The flow stabilizing bucket 3 is connected to the liquid outlet end of the feed pipe 5. The liquid inlet end of the feed pipe 5 extends out of the side wall of the sedimentation tank. A liquid outlet is arranged at the lower part of the flow stabilizing bucket 3.

[0028] A flow guiding plate 4 is arranged on the shaft 6 below the flow stabilizing bucket 3. The flow guiding plate 4 is arranged in a triangular structure to guide the incoming liquid, so as to better disperse it to the bottom of the pit of the sedimentation tank for sedimentation.

[0029] The working principle of the present utility model is as follows:

[0030] When using the fine material recovery device for aluminum fluoride mother liquor of the present utility model, the aluminum fluoride wastewater coming in through the feed pipe enters the pit of the sedimentation tank through the flow stabilizing bucket and the flow guiding plate for sedimentation. After sedimentation for a period of time, the rake stirring device is started. The sedimented aluminum fluoride material enters the bottom of the pit of the sedimentation tank under the action of the rake stirring device. After a period of time, the discharge valve on the discharge pipe is opened. The precipitated aluminum fluoride is sent to the crystallization tank for recycling under the action of the transfer pump. The clarified liquid at a high position in the sedimentation tank is pumped to the three-stage washing tower for circulating washing under the action of the clarified liquid waste transfer pump through the overflow pipe. A small amount of clarified liquid is pumped to the silica belt filter as silica washing water for silica washing of the belt filter, floor washing, etc. It can improve the product yield and reduce the content of aluminum fluoride in the wastewater.

[0031] Although the present utility model has been described herein with reference to multiple explanatory embodiments of the present utility model, it should be understood that those skilled in the art can design many other modifications and embodiments, which will fall within the scope of the principles and spirit disclosed in this application. More specifically, within the scope of the disclosure, drawings and claims of this application, 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 obvious to those skilled in the art.

Claims

1. Aluminum fluoride mother liquor fine material recovery device, characterized in that: It includes a settling tank, a settling tank pit, and a trough rake stirring device. A bridge (2) is provided at the top of the settling tank. The settling tank pit is arranged at the bottom of the settling tank and is connected to the settling tank. An overflow pipe and a feed pipe (5) are provided at the upper part of the side wall of the settling tank. A discharge pipe is provided at the bottom of the settling tank pit, and a discharge valve is arranged on the discharge pipe. A trough rake stirring device is arranged in the space formed by the settling tank and the settling tank pit. The trough rake stirring device passes through the bridge (2) and is connected to a transmission device (1), and the transmission device (1) is connected to an electric control box (11) and a hydraulic station (10).

2. The aluminum fluoride mother liquor fines recovery device according to claim 1, wherein: The settling tank pit is arranged in a funnel shape with a wider top and a narrower bottom.

3. The aluminum fluoride mother liquor fine material recovery device according to claim 1 or 2, characterized in that: The trough rake stirring device includes a shaft (6), a long rake frame (7), a short rake frame (8), and a secondary rake (9). The shaft (6) is connected to the transmission device (1). The long rake frame (7), the short rake frame (8), and the secondary rake (9) are arranged on the shaft (6). The secondary rake (9) is arranged at the bottom of the settling tank pit. The long rake frame (7) and the short rake frame (8) are arranged alternately, and the long rake frame (7) and the short rake frame (8) are arranged in a triangular structure. The bottom inclination angles of the long rake frame (7) and the short rake frame (8) are the same as the lower inclination angle of the settling tank pit.

4. The aluminum fluoride mother liquor fines recovery device according to claim 3, characterized in that: The long rake frame (7) and the short rake frame (8) include a flanged channel steel and a steel pipe. The flanged channel steel is arranged obliquely, and the steel pipe is arranged horizontally. The flanged channel steel and the steel pipe are connected by a connecting rod.

5. The aluminum fluoride mother liquor fine material recovery device according to claim 3, wherein: A steady flow bucket (3) is arranged at the upper part of the shaft (6). The steady flow bucket (3) is connected to the side wall of the settling tank. The steady flow bucket (3) is connected to the liquid outlet end of the feed pipe (5). The liquid inlet end of the feed pipe (5) extends out of the side wall of the settling tank. A liquid outlet is arranged at the lower part of the steady flow bucket (3).

6. The aluminum fluoride mother liquor fine material recovery device according to claim 4, wherein: A guide vane (4) is arranged on the shaft (6) below the steady flow bucket (3). The guide vane (4) is arranged in a triangular structure.

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