A rare earth acid-dissolved waste gas dust recovery device

Abstract

The utility model discloses a kind of rare earth acid solution waste gas dust recovery devices;Belong to waste gas treatment technical field;Its technical key points include tank body, air inlet pipe and air outlet pipe are equipped on the tank body, the air inlet pipe mouth is located below air outlet pipe mouth;Spray water pipe is equipped in air inlet pipe, and several spray holes are distributed on the spray water pipe wall;Overflow plate is equipped in the bottom of tank body, and the tank body is divided into sediment cavity and clean water cavity by overflow plate;Water circulation assembly is connected on the tank body on the side of overflow plate away from air inlet pipe, and the water circulation assembly is connected with spray water pipe;Extraction assembly is connected on the tank body on the side of overflow plate close to air inlet pipe for discharging solution dissolved with rare earth dust;The utility model aims at providing a kind of rare earth acid solution waste gas dust recovery device with simple structure, effectively recover dust, reduce rare earth loss;For the separation and recovery of rare earth dust in rare earth acid solution waste gas.

Description

Technical Field

[0001] This utility model relates to a dust recovery device, and more specifically, to a rare earth acid-soluble waste gas dust recovery device. Background Technology

[0002] The acid dissolution process of rare earth elements generates acid dissolution waste gas and a small amount of rare earth dust. The acid dissolution waste gas is acidic, and direct emission will pollute the environment, so it needs to be treated.

[0003] In current production, acid mist purification towers are commonly used to treat acid-soluble waste gases using the principle of "acid-base neutralization." The upper part of the acid mist purification tower is equipped with liquid alkali delivery pipes, nozzles, and packing material. When rare earth elements dissolve in the acid reaction tank, an exhaust fan draws the acid-soluble waste gas to the lower part of the acid mist purification tower. The waste gas moves upwards into the packing material, where it undergoes a thorough reaction under alkali spray before being discharged at high altitude through an exhaust stack. An alkali recovery device is located at the bottom of the purification tower; the alkali solution can be recycled via pipeline and replaced when the pH value reaches approximately 9.5.

[0004] This treatment method has the following drawbacks: rare earth dust will enter the acid mist purification tower along with the acid-dissolving waste gas, causing blockage of the nozzles and packing material, thus affecting the waste gas treatment effect. Furthermore, the rare earth dust in the waste gas is difficult to recover and reuse, resulting in a waste of rare earth resources. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the prior art by providing a rare earth acid-soluble waste gas dust recovery device that is simple in structure, effectively recovers dust, and reduces rare earth loss.

[0006] The technical solution of this utility model is implemented as follows: a rare earth acid-soluble waste gas dust recovery device includes a tank body, on which an air inlet pipe and an air outlet pipe are provided, with the air inlet pipe opening located below the air outlet pipe opening; a spray water pipe is provided inside the air inlet pipe, and a plurality of spray holes are distributed on the pipe wall of the spray water pipe; an overflow plate is provided at the bottom of the tank body, and the tank body is divided into a sedimentation chamber and a clean water chamber through the overflow plate.

[0007] A water circulation assembly is connected to the tank body on the side of the overflow plate away from the air inlet pipe, and the water circulation assembly is connected to the spray water pipe; a material extraction assembly is connected to the tank body on the side of the overflow plate near the air inlet pipe for discharging the solution containing dissolved rare earth dust.

[0008] In the above-mentioned rare earth acid-soluble waste gas dust recovery device, a filter screen is provided in the tank between the outlet pipe and the inlet pipe, and a guide plate is provided in the tank above the overflow plate; the droplets condensed on the filter screen are guided by the guide plate to the side near the material extraction component.

[0009] In the above-mentioned rare earth acid-soluble waste gas dust recovery device, a first vertical plate is provided at the front end of the guide plate, and a second vertical plate is provided at the bottom of the guide plate between the first vertical plate and the overflow plate, with the bottom end of the second vertical plate located below the bottom end of the first vertical plate.

[0010] In the above-mentioned rare earth acid-soluble waste gas dust recovery device, the water circulation component includes a liquid extraction pipe installed on a tank on the side away from the air inlet pipe, and a first water pump installed on the liquid extraction pipe; a water tank connected to the liquid extraction pipe is provided on one side of the tank, and a water supply pipe connected to the spray water pipe is provided on the water tank, and a second water pump is provided on the water supply pipe.

[0011] In the above-mentioned rare earth acid-soluble waste gas dust recovery device, a flushing pipe is provided on the side wall of the tank on one side of the material extraction component, and the flushing pipe is inclined; when the material extraction component extracts rare earth dust solution, the water flow input into the flushing pipe impacts the rare earth dust that has settled at the bottom of the tank.

[0012] In the above-mentioned rare earth acid-soluble waste gas dust recovery device, the water circulation component is equipped with a three-way pipe, and the two output ends of the three-way pipe are respectively connected to a spray water pipe and a flushing water pipe, and valves are provided at both output ends of the three-way pipe.

[0013] With the above-mentioned structure, the acid-soluble waste gas carrying rare earth dust is sprayed through the spray pipe as it enters the tank through the air inlet pipe. This effectively reduces the amount of dust entering the acid mist purification tower, prevents the acid mist purification tower from becoming clogged, improves the treatment effect of the acid mist purification tower, and reduces environmental pollution.

[0014] After the rare earth dust dissolves in the spray water, it flows into the tank for collection. The solution overflows through the overflow plate, causing the rare earth to precipitate in the sedimentation chamber, which facilitates the recovery of rare earth, avoids loss and waste of rare earth, improves economic efficiency, and prevents rare earth dust from entering the water circulation components and causing blockage. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings, but this does not constitute any limitation on the present invention.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the tank body of this utility model.

[0018] In the diagram: 1. Tank; 2. Air inlet pipe; 3. Air outlet pipe; 4. Spray water pipe; 5. Overflow plate; 6. Water circulation assembly; 6a. Liquid extraction pipe; 6b. First water pump; 6c. Water tank; 6d. Water supply pipe; 6e. Second water pump; 7. Material extraction assembly; 8. Filter screen; 9. Guide plate; 10. First vertical plate; 11. Second vertical plate; 12. Flushing pipe; 13. T-joint pipe; 14. Valve. Detailed Implementation

[0019] See Figure 1-2 As shown, this utility model discloses a rare earth acid-soluble waste gas dust recovery device, comprising a tank 1, an inlet pipe 2 and an outlet pipe 3, with the inlet of the inlet pipe 2 located below the outlet of the outlet pipe 3; a spray water pipe 4 is installed inside the inlet pipe 2, with several spray holes distributed on the pipe wall of the spray water pipe 4; an overflow plate 5 is installed at the bottom of the tank 1, dividing the tank into a sedimentation chamber and a clean water chamber through the overflow plate. The inlet pipe is connected to the acid-soluble equipment, and the outlet pipe is connected to an acid mist purification tower. During the process of the acid-soluble waste gas carrying rare earth dust entering the tank through the inlet pipe, it is sprayed through the spray water pipe, which can effectively reduce the amount of dust entering the acid mist purification tower, prevent the acid mist purification tower from becoming clogged, improve the treatment effect of the acid mist purification tower, and reduce environmental pollution.

[0020] A water circulation assembly 6 is connected to the tank 1 on the side of the overflow plate 5 away from the air inlet pipe 2, and the water circulation assembly 6 is connected to the spray water pipe 4. A material extraction assembly 7 is connected to the tank 1 on the side of the overflow plate 5 closer to the air inlet pipe 2 to discharge the solution containing dissolved rare earth dust. When the rare earth dust dissolves in the spray water, it flows into the tank for collection. The overflow plate overflows the solution, causing the rare earth to precipitate in the sedimentation chamber, facilitating rare earth recovery and preventing rare earth dust from entering the water circulation assembly and causing blockage. The rare earth solution in the sedimentation chamber is extracted by the material extraction assembly and returned to the acid dissolution production line for reuse, avoiding rare earth loss and waste and improving economic efficiency.

[0021] In this embodiment, preferably, a filter screen 8 is provided inside the tank 1 between the outlet of the air pipe 3 and the inlet of the air pipe 2, and a guide plate 9 is provided inside the tank 1 above the overflow plate 5; the droplets condensed on the filter screen 8 are guided by the guide plate 9 to the side near the suction assembly 7. After the acid-dissolving waste gas comes out of the outlet of the air pipe, it will inevitably carry a small amount of dust and water vapor. By setting the filter screen, the dust and water vapor are blocked as much as possible. When the water vapor condenses, it falls back into the lower tank for collection. The guide plate prevents water droplets carrying dust from falling into the clean water chamber.

[0022] More preferably, the guide plate 9 has a first vertical plate 10 at its front end, and a second vertical plate 11 at the bottom of the guide plate 9 between the first vertical plate 10 and the overflow plate 5, with the bottom end of the second vertical plate 11 located below the bottom end of the first vertical plate 10. When the solution falls into the tank, it first enters the sedimentation chamber, and is guided downwards step by step by the first and second vertical plates to near the bottom of the overflow plate, and then flows upwards through the overflow plate into the clean water chamber. This allows the rare earth dust carried in the solution to move towards the bottom of the sedimentation chamber, minimizing the possibility of rare earth entering the clean water chamber and reducing the possibility of rare earth dust entering the water circulation assembly and causing blockage.

[0023] In this embodiment, the water circulation assembly 6 includes a liquid extraction pipe 6a disposed on a tank 1 away from the air inlet pipe 2, and a first water pump 6b mounted on the liquid extraction pipe 6a; a water tank 6c connected to the liquid extraction pipe 6a is disposed on one side of the tank 1, and a water supply pipe 6d connected to the spray water pipe 4 is disposed on the water tank 6c, with a second water pump 6e mounted on the water supply pipe 6d. The water tank is also connected to an external water source to replenish the water volume after the pumping assembly discharges and recycles the solution containing rare earth elements.

[0024] Even after sedimentation, the liquid entering the water purification chamber will inevitably contain trace amounts of rare earth elements. To prevent rare earth elements from entering the spray pipe and causing blockage, a corresponding filter component can be added to one of the liquid extraction pipe, water tank, or water supply pipe. This is common knowledge to those skilled in the art and will not be elaborated here.

[0025] In this embodiment, preferably, a flushing pipe 12 is provided on the side wall of the tank 1 on one side of the material extraction component 7, and the flushing pipe 12 is inclined. When the material extraction component 7 extracts the rare earth dust solution, the water flow entering the flushing pipe 12 impacts the rare earth dust that has settled at the bottom of the tank 1. By replenishing water in the sedimentation chamber and impacting the rare earth dust through the flushing pipe, the rare earth dust can diffuse into the solution and be smoothly extracted by the material extraction component. At the same time, the downward impact of the flushing pipe can cause the rare earth dust to tumble, improving the diffusion efficiency.

[0026] Furthermore, the water circulation assembly 6 is equipped with a three-way pipe 13, the two output ends of which are respectively connected to the spray water pipe 4 and the flushing water pipe 12. A valve 14 is provided at each of the two output ends of the three-way pipe 13. The flushing water pipe is connected to the water circulation assembly, utilizing the water in the purification chamber for flushing, thereby reducing water consumption.

[0027] During operation, acid-soluble waste gas carrying rare earth dust is input into the tank through the inlet pipe. During transport, a second water pump delivers water into the spray pipe for spraying. After exiting the inlet pipe, the gas rises, passes through a filter, and enters the outlet pipe at the top of the tank, where it is transported to the acid mist purification tower. The solution carrying rare earth dust falls into the lower sedimentation chamber for sedimentation. After a period of operation, the extraction assembly mixes the rare earth and liquid in the sedimentation chamber and extracts it for recovery.

[0028] The above-described embodiments are preferred embodiments of the present utility model and are only used to facilitate the illustration of the present utility model. They are not intended to limit the present utility model in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present utility model without departing from the scope of the technical features of the present utility model shall still fall within the scope of the technical features of the present utility model.

Claims

1. A rare earth acid-soluble waste gas dust recovery device comprising a tank body (1), characterized in that, The tank (1) is provided with an air inlet pipe (2) and an air outlet pipe (3), with the inlet of the air inlet pipe (2) located below the inlet of the air outlet pipe (3); a spray water pipe (4) is provided inside the air inlet pipe (2), and several spray holes are distributed on the pipe wall of the spray water pipe (4); an overflow plate (5) is provided at the bottom inside the tank (1), and the tank (1) is divided into a sedimentation chamber and a clean water chamber through the overflow plate (5); A water circulation assembly (6) is connected to the tank (1) on the side of the overflow plate (5) away from the air inlet pipe (2), and the water circulation assembly (6) is connected to the spray water pipe (4); a material extraction assembly (7) is connected to the tank (1) on the side of the overflow plate (5) close to the air inlet pipe (2) for discharging the solution containing dissolved rare earth dust.

2. The rare earth acid-soluble waste gas dust recovery device according to claim 1, characterized in that, A filter screen (8) is provided in the tank (1) between the outlet pipe (3) and the inlet pipe (2), and a guide plate (9) is provided in the tank (1) above the overflow plate (5); the droplets condensed on the filter screen (8) are guided by the guide plate (9) to the side near the material extraction component (7).

3. The rare earth acid-soluble waste gas dust recovery device according to claim 2, characterized in that, The guide plate (9) has a first vertical plate (10) at the front end, and a second vertical plate (11) is provided at the bottom of the guide plate (9) between the first vertical plate (10) and the overflow plate (5). The bottom end of the second vertical plate (11) is located below the bottom end of the first vertical plate (10).

4. The rare earth acid-soluble waste gas dust recovery device according to claim 1, characterized in that, The water circulation assembly (6) includes a liquid extraction pipe (6a) disposed on a tank (1) on the side away from the air inlet pipe (2), and a first water pump (6b) disposed on the liquid extraction pipe (6a); a water tank (6c) connected to the liquid extraction pipe (6a) is disposed on one side of the tank (1), and a water supply pipe (6d) connected to the spray water pipe (4) is disposed on the water tank (6c), and a second water pump (6e) is disposed on the water supply pipe (6d).

5. The rare earth acid-soluble waste gas dust recovery device according to claim 1, characterized in that, A flushing pipe (12) is provided on the side wall of the tank (1) on one side of the material extraction component (7). The flushing pipe (12) is inclined. When the material extraction component (7) extracts the rare earth dust solution, the water flow input into the flushing pipe (12) impacts the rare earth dust that has settled at the bottom of the tank (1).

6. The rare earth acid-soluble waste gas dust recovery device according to claim 5, characterized in that, The water circulation component (6) is provided with a three-way pipe (13), and the two output ends of the three-way pipe (13) are respectively connected to the spray water pipe (4) and the flushing water pipe (12). A valve (14) is provided at both output ends of the three-way pipe (13).

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