CN219136874U - Wet recovery device for three-way catalyst - Google Patents
Wet recovery device for three-way catalyst Download PDFInfo
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- CN219136874U CN219136874U CN202320212764.1U CN202320212764U CN219136874U CN 219136874 U CN219136874 U CN 219136874U CN 202320212764 U CN202320212764 U CN 202320212764U CN 219136874 U CN219136874 U CN 219136874U
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Abstract
The application discloses wet recovery device of three-way catalyst, it includes grinding machine, reduction tank, first filter, impregnating vessel and second filter, the second feed inlet of reduction tank is connected to the first discharge gate of grinding machine, the second discharge gate of reduction tank communicates the third feed inlet of first filter through the first material pump, the impregnating vessel is located one side of first filter, the fourth discharge gate of impregnating vessel communicates the fifth feed inlet of second filter through the second material pump; the first inlet of the first circulating pump is communicated with the first circulating outlet of the reduction tank, and the first outlet of the first circulating pump is communicated with the second discharge port of the reduction tank; the second inlet of the second circulating pump is communicated with the second circulating outlet of the impregnating tank, and the second outlet of the second circulating pump is communicated with the fourth discharge port of the impregnating tank; the stirrer is arranged in the reduction tank and the dipping tank. The method can avoid the formation of sediment of materials in the tank, and is favorable for reduction and leaching of the catalyst.
Description
Technical Field
The utility model relates to a wet method recovery device of a three-way catalyst.
Background
At present, when the waste three-way catalyst of the automobile is recovered, two processes of a smelting method and a wet method are generally adopted, wherein the smelting method comprises smelting enrichment, chlorination carbonization and the like, and alloy is formed by a platinum group metal trapping agent and platinum group metal, so that the aim of separation and extraction is fulfilled. The smelting process has the disadvantages of large investment, high production energy consumption and reduced recovery economic benefit. The wet recovery technology has the advantages of low equipment requirement, easy operation, low energy consumption, short process flow and the like, but has the disadvantages of high content of platinum group metals in residues, unstable leaching rate and the like in the treatment process, so that the recovery rate of the platinum group metals is reduced.
Disclosure of Invention
In order to solve the problems, the utility model provides a wet recovery device of a three-way catalyst, which comprises a grinder, a reduction tank, a first filter, an impregnation tank and a second filter, wherein a first discharge port of the grinder is connected with a second feed port of the reduction tank, a second discharge port at the bottom of the reduction tank is communicated with a third feed port of a first filter through a first material pump, the impregnation tank is positioned at one side of the first filter, filter residues discharged from the first filter can be fed into the impregnation tank, and a fourth discharge port at the bottom of the impregnation tank is communicated with a fifth feed port of the second filter through a second material pump;
the first inlet of the first circulating pump is communicated with a first circulating outlet of the reduction tank, the first circulating outlet is positioned at the upper part of the reduction tank, and in the height direction, the first circulating outlet is lower than a set liquid level line in the reduction tank, and the first outlet of the first circulating pump is communicated with a second discharge port of the reduction tank;
the second inlet of the second circulating pump is communicated with the second circulating outlet of the impregnating tank, the second circulating outlet is positioned at the upper part of the impregnating tank, and in the height direction, the second circulating outlet is lower than a set liquid level line in the impregnating tank, and the second outlet of the second circulating pump is communicated with the fourth discharge port of the impregnating tank;
the stirrer is arranged in the reduction tank and the dipping tank.
When wet recovery unit in this application operates, firstly throw into the grinding machine with useless three way catalyst, grind into powder, then send into the reducing tank with the powder in, the splendid attire has as the reductant in the reducing tank, reduces the dead catalyst, makes platinum group metal activity obtain reinforcing, improves the leaching rate of platinum group metal in the dipping process of next step. When the reduction reaction is carried out, the first circulating pump is started to circulate the materials in the reduction tank, and the materials in the reduction tank can be impacted due to the fact that the materials enter the reduction tank from the second discharging hole at the bottom of the reduction tank, so that the materials are kept in a boiling state, the three-way catalyst powder is prevented from being deposited at the bottom of the reduction tank, and meanwhile the first stirrer is started to stir the materials.
After the reduction time is reached, the first circulating pump is closed, the first material pump is started, materials in the reduction tank are fed into the first filter, centrifugal filtration is carried out, after filtration is completed, filter residues in the first filter are fed into the impregnation tank, acid liquor is contained in the impregnation tank, the second stirrer is started, and meanwhile, the second circulating pump is started to circulate the materials in the impregnation tank. The material in the impregnation tank is circulated, and the material is added dropwise into the impregnation tank as an oxidizing agent solution. After the reaction is completed, the second circulating pump is closed, the second material pump is started, the materials in the impregnating tank are sent into the second filter, centrifugal filtration is carried out, and filtrate is recovered and used for extracting platinum, rhodium and palladium metals in the filtrate.
In this application, can utilize first circulating pump and second circulating pump to circulate the material in reduction jar and the flooding jar respectively, improve the reaction and also to the contact efficiency of powder, avoid the material in the jar to form the sediment, be favorable to reducing and leaching to the catalyst, adopt this application back, can make the leaching rate of platinum group metal improve 8-15%.
Further, the device also comprises a powder tank, wherein the powder tank is positioned below the first discharge hole of the grinder, a powder outlet is arranged at the bottom of the powder tank, and the powder outlet is communicated with the second feed hole of the reduction tank through an air flow conveying pump. Partial catalyst powder can be temporarily stored by using the powder tank so as to ensure the production stability.
Further, in order to collect the produced filtrate of first filter and second filter, still include a liquid storage pot, the first filtrate mouth of first filter and the second filtrate mouth of second filter all communicate the liquid storage pot.
Further, in order to reduce equipment cost, the top of the liquid storage tank is lower than the first filtrate port and the second filtrate port, and filtrate in the first filter and the second filter can enter the liquid storage tank through self-flowing.
Specifically, for ease of operation, the first filter and the second filter are both centrifugal filters.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model.
Detailed Description
Referring to fig. 1, a wet recycling apparatus of a three-way catalyst includes a grinder 10, a reduction tank 20, a first filter 30, an impregnation tank 40, and a second filter 50. In this embodiment, the grinding machine 10 is a horizontal dry grinding machine, and the grinding machine 10 includes a support table 14 and a housing 11 mounted on the support table 14, two support rings 12 are fixedly mounted on an outer peripheral surface of the housing, a support 15 is fixedly mounted on an upper surface of the support table 14 corresponding to each support ring, the support 15 has a downwardly protruding support surface having an arc shape, a rotor is rotatably mounted on the support surface, and the support rings are rotatably supported on the rotor. A gear ring 13 is fixedly arranged on the outer peripheral surface of one end of the machine shell, a motor 16 is fixedly arranged on the supporting table, a driving wheel 17 is arranged on the output shaft of the motor, the gear ring is meshed with the driving wheel, and grinding balls are filled in the machine shell. A first feed inlet 18 and a first discharge outlet 19 are respectively arranged at two opposite ends of the casing.
A powder tank 70 is mounted directly below the first outlet 19 of the mill, the bottom of which is provided with a powder outlet 71, the powder outlet 71 being in communication with the second inlet 26 of the reduction tank 20 via an air flow transfer pump 76. The reduction tank is a vertical tank with a conical bottom, and the second feeding hole is positioned on the top cover of the reduction tank. I.e. the first outlet of the mill is connected to the second inlet of the reduction tank.
The bottom of the reduction tank is provided with a second discharge hole 21, two paths of first branch pipes are led out from the second discharge hole 21, the two paths of first branch pipes are a first circulating pipe 22 and a first slurry discharging pipe 23 respectively, a first inlet of a first circulating pump 24 is communicated with a first circulating outlet 25 of the reduction tank, the first circulating outlet is positioned at the upper part of the reduction tank, and in the height direction, the first circulating outlet is lower than a set liquid level line in the reduction tank. The first outlet of the first circulation pump 24 is communicated with the first circulation pipe 22, i.e., the first outlet of the first circulation pump is communicated with the second discharge port of the reduction tank. Namely, the second discharging hole is used as a discharging hole and a circulating liquid inlet at the same time. A first stirrer 27 is installed in the reduction tank, and a first liquid inlet 29 is installed at the top of the reduction tank. The first liquid inlet is used for adding liquid materials into the reduction tank.
The first slurry discharging pipe 23 is communicated with an inlet of a first material pump 28, and an outlet of the first material pump 28 is communicated with a third feed inlet of a first filter 30. In the present embodiment, the first filter 30 is a centrifugal filter having a first opening 32 in an open shape facing upward, which serves as both a third feed port and a residue outlet, and a first filtrate port 31 is provided at the bottom of the first filter.
The impregnation tank is a vertical tank having a conical bottom, a fourth feed port 46 is provided in a top cover of the impregnation tank, the impregnation tank is provided at one side of the first filter, and filter residues discharged from the first filter can be fed into the impregnation tank 40 through the fourth feed port.
A fourth discharge port 41 is arranged at the bottom of the impregnation tank, two paths of second branch pipes are led out from the fourth discharge port 41, the two paths of second branch pipes are a second circulating pipe 42 and a second slurry discharging pipe 43 respectively, a second inlet of a second circulating pump 44 is communicated with a second circulating outlet 45 of the impregnation tank, the second circulating outlet is positioned at the upper part of the impregnation tank, and in the height direction, the second circulating outlet is lower than a set liquid level line in the impregnation tank. The second outlet of the second circulation pump 44 is communicated with the second circulation pipe 42, i.e. the second outlet of the second circulation pump is communicated with the fourth discharge port of the impregnation tank. Namely, the fourth discharge port is used as a discharge port and a circulating liquid inlet at the same time. A second stirrer 47 is mounted in the impregnation tank, and a second liquid inlet 49 is mounted at the top of the impregnation tank. The second liquid inlet is used for adding liquid materials into the impregnating tank.
The second slurry discharge pipe 43 is communicated with an inlet of a second material pump 48, and an outlet of the second material pump 48 is communicated with a fifth feed inlet of a second filter 50. In this embodiment, the second filter 50 is a centrifugal filter having an upwardly facing second opening 52 in the form of an opening, which serves as both a fifth feed opening and a filter residue outlet. A second filtrate port 51 is provided at the bottom of the second filter.
The first filtrate port of the first filter and the second filtrate port of the second filter are both in communication with the liquid reservoir 60. In this embodiment, the top of the liquid storage tank is lower than the first filtrate port and the second filtrate port, and the filtrate in the first filter and the second filter can enter the liquid storage tank through self-flowing.
The first circulating pump, the second circulating pump, the first material pump and the second material pump are all stainless steel slurry pumps.
When the embodiment is operated, firstly, the waste three-way catalyst is put into the grinder 10 and ground into powder, then the powder is discharged into the powder tank 70, the powder in the powder tank 70 is driven by compressed air to be sent into the reduction tank through the air flow conveying pump 76, hydrazine hydrate serving as a reducing agent is contained in the reduction tank, and the waste catalyst is reduced, so that the activity of platinum group metal is enhanced, and the leaching rate of the platinum group metal in the next dipping process is improved. When the reduction reaction is carried out, the first circulating pump 24 is started to circulate the materials in the reduction tank, and the materials in the reduction tank can be impacted due to the fact that the materials enter the reduction tank from the second discharging hole at the bottom of the reduction tank, so that the materials are kept in a boiling state, the three-way catalyst powder is prevented from being deposited at the bottom of the reduction tank, and meanwhile, the first stirrer is started to stir the materials.
After the reduction time is reached, the first circulating pump 24 is closed, the first material pump 28 is started, the material in the reduction tank is fed into the first filter, centrifugal filtration is carried out, filtrate in the first material pump enters the liquid storage tank 60, filter residues are kept in the first filter, filter residues in the first filter are fed into the dipping tank, hydrochloric acid is contained in the dipping tank, the second stirrer is started, the second circulating pump is started at the same time, the material in the dipping tank is circulated, and the material in the dipping tank can be impacted due to the fact that the material enters the dipping tank from the fourth discharge port at the bottom of the dipping tank, so that the material is kept in a boiling state, and the filter residues are prevented from being deposited at the bottom of the dipping tank. And when the materials in the impregnating tank are circulated, dropwise adding potassium chlorate solution serving as an oxidant into the impregnating tank through the second liquid inlet. After the reaction is completed, the second circulation pump 44 is closed, the second material pump 48 is started, the material in the impregnation tank is sent into the second filter for centrifugal filtration, filtrate in the impregnation tank enters the liquid storage tank 60, filter residues are kept in the second filter, and filter residues in the second filter are treated as waste. And then carrying out distribution precipitation on the solution in the liquid storage tank to extract the platinum, rhodium and palladium metals in the solution. In this embodiment, the leaching rate of the platinum group metal is 95%, and after the test, the leaching rate of the platinum group metal is 84% after the first circulation pump and the second circulation pump are canceled, and by adopting the implementation, the leaching rate of the platinum group metal can be improved by 11%.
Claims (6)
1. The wet method recovery device of the three-way catalyst is characterized by comprising a grinder, a reduction tank, a first filter, an impregnating tank and a second filter, wherein a first discharge port of the grinder is connected with a second feed port of the reduction tank, a second discharge port at the bottom of the reduction tank is communicated with a third feed port of a first filter through a first material pump, the impregnating tank is positioned at one side of the first filter, filter residues discharged from the first filter can be fed into the impregnating tank, and a fourth discharge port at the bottom of the impregnating tank is communicated with a fifth feed port of the second filter through a second material pump;
the first inlet of the first circulating pump is communicated with a first circulating outlet of the reduction tank, the first circulating outlet is positioned at the upper part of the reduction tank, and in the height direction, the first circulating outlet is lower than a set liquid level line in the reduction tank, and the first outlet of the first circulating pump is communicated with a second discharge port of the reduction tank;
the second inlet of the second circulating pump is communicated with the second circulating outlet of the impregnating tank, the second circulating outlet is positioned at the upper part of the impregnating tank, and in the height direction, the second circulating outlet is lower than a set liquid level line in the impregnating tank, and the second outlet of the second circulating pump is communicated with the fourth discharge port of the impregnating tank;
the stirrer is arranged in the reduction tank and the dipping tank.
2. The wet three-way catalyst recycling apparatus according to claim 1, wherein the grinder is a horizontal dry grinder.
3. The wet process recycling device for three-way catalysts according to claim 1, further comprising a powder tank, wherein the powder tank is positioned below the first discharge port of the grinder, a powder outlet is arranged at the bottom of the powder tank, and the powder outlet is communicated with the second feed port of the reduction tank through an air flow conveying pump.
4. The wet three way catalyst recovery apparatus according to claim 1, further comprising a liquid storage tank, wherein the first filtrate port of the first filter and the second filtrate port of the second filter are both in communication with the liquid storage tank.
5. The wet three way catalyst recovery device of claim 4 wherein the top of the liquid storage tank is lower than the first filtrate port and the second filtrate port, and filtrate in the first filter and the second filter is allowed to enter the liquid storage tank by gravity flow.
6. The wet three-way catalyst recycling apparatus according to claim 1, wherein the first filter and the second filter are both centrifugal filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320212764.1U CN219136874U (en) | 2023-02-14 | 2023-02-14 | Wet recovery device for three-way catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320212764.1U CN219136874U (en) | 2023-02-14 | 2023-02-14 | Wet recovery device for three-way catalyst |
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| Publication Number | Publication Date |
|---|---|
| CN219136874U true CN219136874U (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320212764.1U Active CN219136874U (en) | 2023-02-14 | 2023-02-14 | Wet recovery device for three-way catalyst |
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| CN (1) | CN219136874U (en) |
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- 2023-02-14 CN CN202320212764.1U patent/CN219136874U/en active Active
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