阅读说明：本技术 一种废旧汽车尾气催化剂中贵金属高效提纯装置及方法 (Device and method for efficiently purifying precious metals in waste automobile exhaust catalyst ) 是由 不公告发明人 于 2021-01-13 设计创作，主要内容包括：本发明提供一种废旧汽车尾气催化剂中贵金属高效提纯装置及方法,包括支撑台,支撑台的底端固定连接有若干支撑腿,支撑腿的底端固定连接有橡胶垫,支撑台的顶部一端固定安装有研磨机构,研磨机构的一侧固定安装有焙烧机构,焙烧机构的一侧固定安装有洗涤机构,洗涤机构的有一固定安装有提取机构,本发明：通过设有的研磨机构,将三元催化剂固体进行研磨,在高温焙烧的作用下,可以将三元催化剂中存有的硫元素和碳元素进行去除,把贵金属与不需要的废料进行分隔,设有的洗涤机构,减少了研磨、研磨和焙烧过程中产生的废弃催化剂,提高了剩余贵金属的活性。(The invention provides a device and a method for efficiently purifying noble metals in waste automobile exhaust catalysts, which comprises a supporting table, wherein the bottom end of the supporting table is fixedly connected with a plurality of supporting legs, the bottom ends of the supporting legs are fixedly connected with rubber pads, one end of the top of the supporting table is fixedly provided with a grinding mechanism, one side of the grinding mechanism is fixedly provided with a roasting mechanism, one side of the roasting mechanism is fixedly provided with a washing mechanism, and one side of the washing mechanism is fixedly provided with an extraction mechanism, the device and the method comprise the following steps: the grinding mechanism grinds the three-way catalyst solid, under the action of high-temperature roasting, sulfur elements and carbon elements existing in the three-way catalyst can be removed, precious metals are separated from unnecessary waste materials, and the washing mechanism is arranged, so that waste catalysts generated in the grinding, grinding and roasting processes are reduced, and the activity of the residual precious metals is improved.)

1. The utility model provides a high-efficient purification device of noble metal among old and useless automobile exhaust catalyst, includes brace table (1), its characterized in that: the supporting device is characterized in that the supporting platform (1) is fixedly connected with a plurality of supporting legs (2) at the bottom end, the supporting legs (2) are fixedly connected with rubber pads (3), a grinding mechanism (4) is fixedly mounted at one end of the top of the supporting platform (1), a roasting mechanism (5) is fixedly mounted at one side of the grinding mechanism (4), a washing mechanism (6) is fixedly mounted at one side of the roasting mechanism (5), and an extracting mechanism (7) is fixedly mounted at one side of the washing mechanism (6).

2. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 1 is characterized in that: the grinding mechanism (4) comprises a plurality of support rods which are fixedly arranged at the top of the support table (1), the top end of the supporting rod is fixedly connected with a grinding box (41), the bottom of the grinding box (41) is fixedly connected with a discharging funnel (42), two grinding rods are inserted and connected in the grinding box (41), a plurality of grinding teeth (43) are fixedly connected on the surface of each grinding rod, one end surface of one of the grinding rods is sleeved with a first gear, one end of the other grinding rod is fixedly connected with a second gear (44), the first gear is meshed with the second gear (44), one side of the first gear is fixedly connected with a flywheel (45), the flywheel (45) is in transmission connection with the output end of a driving motor (47) through a belt (46), one side fixedly connected with backup pad of brace table (1), driving motor (47) fixed mounting is at the backup pad top.

3. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 1 is characterized in that: roasting mechanism (5) are including two dead levers (51) of fixed mounting at brace table (1) top, the fixed surface of dead lever (51) is connected with two bow-shaped framves (52), the top of bow-shaped frame (52) is seted up flutedly, the top of bow-shaped frame (52) is equipped with rotary kiln (53), the fixed surface of rotary kiln (53) overlaps and is equipped with annular rail (54), annular rail (54) rotate with the recess and are connected, the surface of rotary kiln (53) is located one side of annular rail (54) and is fixed and be equipped with driven ring gear (55), one side meshing of driven ring gear (55) is connected with driving gear (56), one side fixed connection of driving gear (56) is in the output of rotating motor (57), rotating motor (57) is through supporting seat fixed connection in one of them dead lever (51) surface.

4. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 3 is characterized in that: a filtering tank (8) is fixedly arranged on one side, located on the two fixing rods (51), of the top of the supporting table (1), and a water outlet is formed in one side of the filtering tank (8).

5. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 4 is characterized in that: the washing mechanism (6) comprises a plurality of round rods (61) which are fixedly arranged in the filtering tank (8), the top end of the round rod (61) is fixedly connected with a cleaning barrel (62), the bottom end of the cleaning barrel (62) is communicated with a water outlet pipe, the surface of the water outlet pipe is fixedly connected with a manual valve (63), one side of the top of the cleaning barrel (62) is movably connected with a barrel cover (64), the middle part of the barrel cover (64) is connected with a stirring rod (65) in a penetrating way, one end of the stirring rod (65) is connected with a stirring motor (66) through a transmission belt, the surface of the stirring motor (66) is fixedly connected with a mounting rack (67), one end of the mounting rack (67) is movably hinged on the surface of the cleaning barrel (62) through a hinge, the other end of the mounting rack (67) is movably hinged with a pneumatic rod (68), and one end of the pneumatic rod (68) is movably hinged on one side of the bottom of the cleaning barrel (62).

6. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 5 is characterized in that: the inner wall of the cleaning barrel (62) is embedded with a heating ring (621), one end of the heating ring (621) is fixedly connected with a heater, an inner container (622) is fixedly connected inside the cleaning barrel (62), the surface of the barrel cover (64) is fixedly connected with a temperature sensor (641), one side of the temperature sensor (641) is fixedly connected with a pressure sensor (642), and one side of the pressure sensor (642) is provided with a pressure release valve (643).

7. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 1 is characterized in that: draw mechanism (7) including square pole (71) of fixed mounting at brace table (1) top, the top fixedly connected with support frame (72) of square pole (71), a plurality of holes have been seted up on the surface of support frame (72), downthehole one-level extraction bucket (73), second grade extraction bucket (74) and tertiary extraction bucket (75) of inlaying respectively, through closed pipe (76) UNICOM between the adjacent extraction bucket.

8. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 5 is characterized in that: the surfaces of the round rods (61) are made of anti-corrosion materials.

9. The device for efficiently purifying the noble metals in the waste automobile exhaust catalyst according to claim 1 is characterized in that: the utility model discloses a temperature control device, including a support table (1), heater, driving motor (47), rotating motor (57), agitator motor (66), temperature sensor (641), pressure sensor (642), the opposite side fixed mounting of brace table (1) has the PLC controller, heating ring (621) and heater electric connection, heater, driving motor (47), rotating motor (57), agitator motor (66), temperature sensor (641) and pressure sensor (642) all with PLC controller electric connection, the PLC controller is connected with external power supply.

10. A method for efficiently purifying precious metals in waste automobile exhaust catalysts comprises the device and the method for efficiently purifying the precious metals in the waste automobile exhaust catalysts, which are disclosed in claims 1-9, and is characterized in that: the method also comprises the following operation steps:

s1, crushing and grinding the waste automobile exhaust catalyst to 180-200 meshes;

s2, mixing the waste automobile exhaust catalyst grinding powder with sodium formate, and roasting at 350-550 ℃ for 2-3.5 hours;

s3, adding clear water into the inner container (622) to heat to 85-95 ℃, putting the roasted material into the inner container (622), adding a sodium borohydride solution accounting for 2-4% of the material by mass, heating together, stirring and washing simultaneously, filtering the obtained reducing solution, mixing the reducing solution with sodium chloride and sodium chlorite acid solution, uniformly mixing, and transferring to a leaching device;

s4: and (3) putting the leaching solution into an extraction mechanism (7), and then separating and purifying to obtain the noble metal.

Technical Field

The invention relates to the technical field of purification of noble metals in catalysts, in particular to a high-efficiency purification device for noble metals in waste automobile exhaust catalysts.

Background

The three-way catalytic converter for automobile is one of the most important external purifier installed in exhaust system of automobile and can convert harmful gas, such as CO, HC and NOX, exhausted from tail gas of automobile into harmless carbon dioxide, water and nitrogen through oxidation and reduction. Because the catalyst can simultaneously convert three main harmful substances in the waste gas into harmless substances, the catalyst is called as a three-way catalyst, and more kinds of rare precious metals are added into the three-way catalyst, and a large number of researches prove that: the three-way catalyst containing noble metal palladium, platinum and rhodium can simultaneously purify carbon monoxide, hydrocarbon and oxynitride in automobile exhaust, and plays an important role in reducing automobile exhaust pollution. The unique catalytic activity, selectivity and stability of the precious metal enable the precious metal to be widely applied to the industry of three-way catalysts, however, with the rapid development of the automobile industry, the demand for precious metal for manufacturing three-way catalysts is increased, for China with scarce precious metal resources, consciousness is weak in the aspect of precious metal extraction of waste three-way catalysts, objective precious metal exists in the tail gas pipe of a large number of waste automobiles every year, effective utilization and extraction cannot be carried out, import precious metal has to be relied on, part of industries develop and extract precious metal in waste three-way catalysts at present, but no professional extraction equipment or method exists, and the extraction rate in the extraction process is low.

Disclosure of Invention

The invention aims to provide a device and a method for efficiently purifying precious metals in waste automobile exhaust catalysts, and aims to solve the problem of low utilization rate of the conventional waste ternary catalytic extraction.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high-efficient purification device of noble metal in old and useless automobile exhaust catalyst, includes a supporting bench, a plurality of supporting legs of the bottom fixedly connected with of a supporting bench, the bottom fixedly connected with rubber pad of supporting leg, the top one end fixed mounting of a supporting bench has grinding mechanism, one side fixed mounting who grinds mechanism has calcination mechanism, one side fixed mounting of calcination mechanism has washing mechanism, there is a fixed mounting that washing mechanism draws the mechanism.

In order to facilitate the grinding of the catalyst, as a preferred embodiment of the present invention: the grinding mechanism comprises a plurality of supporting rods fixedly mounted at the top of a supporting table, a grinding box is fixedly connected to the top ends of the supporting rods, a discharging hopper is fixedly connected to the bottom of the grinding box, two grinding rods are connected to the inside of the grinding box in an inserting mode, a plurality of grinding teeth are fixedly connected to the surfaces of the grinding rods, a first gear is sleeved on one end surface of one of the grinding rods, a second gear is fixedly connected to one end of the other grinding rod, the first gear is meshed with the second gear and is connected with the flywheel, one side of the first gear is fixedly connected with a flywheel, the flywheel is connected to the output end of a driving motor through belt transmission, a supporting plate is fixedly connected to one side of the supporting table, and the driving motor is fixedly mounted at the.

In order to remove impurity elements such as sulfur and carbon from the ground catalyst, a preferred embodiment of the present invention is: the roasting mechanism comprises two fixed rods fixedly mounted at the top of a supporting table, the fixed surfaces of the fixed rods are fixedly connected with two arc-shaped frames, the tops of the arc-shaped frames are provided with grooves, the tops of the arc-shaped frames are provided with rotary kilns, the surface of each rotary kiln is sleeved with an annular rail, the annular rails are rotatably connected with the grooves, one side of the surface of each rotary kiln, which is located on the annular rail, is fixedly provided with a driven gear ring, one side of the driven gear ring is meshed with a driving gear, one side of the driving gear is fixedly connected to the output end of a rotating motor, and the rotating motor is fixedly connected to the surface of one of the.

In order to filter the reducing solution after washing, as a preferred embodiment of the present invention: a filtering tank is fixedly arranged on one side, located on the two fixing rods, of the top of the supporting table, and a water outlet is formed in one side of the filtering tank.

In order to clean the calcined catalyst, a preferable embodiment of the present invention is: washing mechanism includes a plurality of round bars of fixed mounting inside the filtering ponds, the top fixedly connected with of round bar washs the bucket, the bottom UNICOM of wasing the bucket is equipped with the outlet pipe, the fixed surface of outlet pipe is connected with manual valve, top one side swing joint who washs the bucket has the bung, the middle part through connection of bung has the stirring rod, the one end of stirring rod is connected with agitator motor through the drive belt transmission, agitator motor's fixed surface is connected with the mounting bracket, the one end of mounting bracket passes through hinge swing joint on the washing bucket surface, the other end swing joint of mounting bracket has the pneumatic stem, the one end activity of pneumatic stem articulates in washing bottom half portion one side.

In order to heat the cleaning liquid, as a preferred embodiment of the present invention: the inner wall of washing bucket inlays and is equipped with the heating ring, the one end fixedly connected with heater of heating ring, the inside fixedly connected with inner bag of washing bucket, the fixed surface of bung is connected with temperature sensor, one side fixedly connected with pressure sensor of temperature sensor, the relief valve has been seted up to one side of pressure sensor.

In order to facilitate the extraction of precious metals, as a preferred embodiment of the present invention: draw the mechanism and include the square pole of fixed mounting at a supporting bench top, the top fixedly connected with support frame of square pole, a plurality of holes have been seted up on the surface of support frame, downthehole one-level extraction bucket, second grade extraction bucket and the tertiary extraction bucket of inlaying respectively, through the UNICOM of communicating pipe between the adjacent extraction bucket.

In order to provide the round bar with the anti-corrosion function, the invention adopts a preferable scheme that: the surfaces of the round rods are made of anti-corrosion materials.

In order to operate the plant, as a preferred embodiment of the present invention: the utility model discloses a heating device, including a support table, a heater, a driving motor, a rotation motor, a stirring motor, a temperature sensor and a pressure sensor, the opposite side fixed mounting of brace table has the PLC controller, heating ring and heater electric connection, heater, driving motor, rotation motor, agitator motor, temperature sensor and pressure sensor all with PLC controller electric connection, the PLC controller is connected with external power.

Meanwhile, the invention also provides a method for efficiently purifying precious metals in the waste automobile exhaust catalyst, which comprises the following operation steps:

s1, crushing and grinding the waste automobile exhaust catalyst to 180-200 meshes;

s2, mixing the waste automobile exhaust catalyst grinding powder with sodium formate, and roasting at 350-550 ℃ for 2-3.5 hours;

s3, adding clear water into the inner container, heating to 85-95 ℃, putting the roasted material into the inner container, adding a sodium borohydride solution accounting for 2-4% of the material by mass, heating, stirring and washing, filtering the obtained reducing solution, mixing with sodium chloride and sodium chlorite acid solutions, uniformly mixing, and transferring to a leaching device;

s4: and (4) putting the leaching solution into an extraction mechanism, and then separating and purifying to obtain the noble metal.

Compared with the prior art, the device and the method for efficiently purifying the noble metals in the waste automobile exhaust catalyst have the following beneficial effects:

1) through the grinding mechanism, when the driving motor rotates, the grinding teeth in the grinding box are driven to grind the three-way catalyst solid in the waste tail gas pipe, so that precious metals in the catalyst can be filtered and reacted with corresponding reagents in later-stage processing conveniently, and the metals can be extracted efficiently and quickly;

2) through the roasting mechanism, under the action of high-temperature roasting, sulfur elements and carbon elements existing in the three-way catalyst can be removed, noble metals and unnecessary waste materials are separated, the existence of the sulfur elements and the carbon elements is prevented, the influence on the later extraction reaction is prevented, and the purification effect is reduced;

3) the washing mechanism reduces the waste catalyst generated in the grinding, grinding and roasting processes, improves the activity of the residual noble metal, and the extraction mechanism can separate and purify the concentrated leachate to obtain the high-purity noble metal.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the grinding mechanism according to the present invention;

FIG. 3 is a schematic structural view of a roasting mechanism according to the present invention;

FIG. 4 is a schematic view of the washing mechanism according to the present invention;

FIG. 5 is a schematic view of the interior of the washing mechanism of the present invention;

FIG. 6 is a schematic view of the inner wall structure of the cleaning barrel according to the present invention;

fig. 7 is a schematic view of the structure of the extraction mechanism of the present invention.

In the figure: 1. a support table; 2. supporting legs; 3. a rubber pad; 4. a grinding mechanism; 41. grinding a box; 42. a discharging hopper; 43. grinding the teeth; 44. a second gear; 45. a flywheel; 46. a belt; 47. a drive motor; 5. a roasting mechanism; 51. fixing the rod; 52. an arched frame; 53. a rotary kiln; 54. an annular rail; 55. a driven gear ring; 56. a driving gear; 57. rotating the motor; 6. a washing mechanism; 61. a round bar; 62. a washing barrel; 621. a heating ring; 622. an inner container; 63. a manual valve; 64. a barrel cover; 641. a temperature sensor; 642. a pressure sensor; 643. a pressure relief valve; 65. a stirring rod; 66. a stirring motor; 67. a mounting frame; 68. a pneumatic rod; 7. an extraction mechanism; 71. a square rod; 72. a support frame; 73. a first-stage extraction barrel; 74. a secondary extraction barrel; 75. a third-stage extraction barrel; 76. a communicating pipe; 8. and (4) a filtering tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-7, the present invention provides the following technical solutions: the utility model provides a high-efficient purification device of noble metal among old and useless automobile exhaust catalyst, includes brace table 1, a plurality of supporting legs of bottom fixedly connected with 2 of brace table 1, the bottom fixedly connected with rubber pad 3 of supporting leg 2, the top one end fixed mounting of brace table 1 has grinding mechanism 4, one side fixed mounting of grinding mechanism 4 has calcination mechanism 5, one side fixed mounting of calcination mechanism 5 has washing mechanism 6, there is a fixed mounting of washing mechanism 6 to draw mechanism 7.

In this embodiment: grinding mechanism 4 includes a plurality of bracing pieces of fixed mounting at brace table 1 top, the top fixedly connected with of bracing piece grinds case 41, the bottom fixedly connected with ejection of compact funnel 42 of grinding case 41, the inside interlude of grinding case 41 is connected with two grinding rods, the fixed surface of grinding rod is connected with a plurality of grinding teeth 43, the end surface cover of one of them grinding rod is equipped with first gear, the one end fixedly connected with second gear 44 of another grinding rod, first gear is connected with the meshing of second gear 44, one side fixedly connected with flywheel 45 of first gear, flywheel 45 passes through belt 46 transmission and connects in driving motor 47's output, one side fixedly connected with backup pad of brace table 1, driving motor 47 fixed mounting is at the backup pad top.

Specifically, put into grinding box 41 inside with the catalyst, it will drive belt 46 through the operation of driving motor 47 and rotate, belt 46 drives flywheel 45, thereby drive the first gear rotation with flywheel 45 fixed connection, first gear drives the second gear 44 that the meshing is connected, thereby drive respective fixed connection's grinding rod, grinding rod rotates the grinding teeth 43 that drives the surface and carries out the breakage grinding with the catalyst, be convenient for the calcination, the catalyst after the grinding flows out through the ejection of compact funnel 42 of grinding box 41 bottom.

In this embodiment: roasting mechanism 5 includes two dead levers 51 of fixed mounting at a supporting bench 1 top, the fixed surface of dead lever 51 is connected with two bow-shaped framves 52, the top of bow-shaped frame 52 is seted up flutedly, the top of bow-shaped frame 52 is equipped with rotary kiln 53, rotary kiln 53's fixed surface overlaps and is equipped with annular rail 54, annular rail 54 rotates with the recess and is connected, rotary kiln 53's surface is located the fixed driven ring gear 55 that is equipped with in one side of annular rail 54, one side meshing of driven ring gear 55 is connected with driving gear 56, one side fixed connection of driving gear 56 is in the output of rotating motor 57, rotating motor 57 passes through supporting seat fixed connection in one of them dead lever.

Specifically, after the ground catalyst is mixed with sodium formate, the mixture is placed into a rotary kiln 53 for roasting, a rotating motor 57 is operated to drive a driving gear 56 to operate, the driving gear 56 drives a driven gear ring 55 connected with the driving gear in a meshed mode, so that the rotary kiln 53 rotates, and an annular rail 54 on the surface of the rotary kiln 53 is arranged at the top of an arch-shaped frame 52 and rotates in a groove.

In this embodiment: a filtering tank 8 is fixedly arranged on one side of the top of the supporting platform 1, which is positioned on the two fixing rods 51, and a water outlet is formed in one side of the filtering tank 8.

Specifically, when the manual valve 63 is opened, the liquid in the inner container 622 flows into the filtering basin 8 through the water outlet pipe penetrating and connecting the cleaning barrel 62 and the inner container 622, and is filtered.

In this embodiment: washing mechanism 6 includes a plurality of round bars 61 of fixed mounting in 8 inside filter ponds, the top fixedly connected with of round bar 61 washs bucket 62, the bottom UNICOM of washing bucket 62 is equipped with the outlet pipe, the fixed surface of outlet pipe is connected with manual valve 63, top one side swing joint who washs bucket 62 has bung 64, the middle part through connection of bung 64 has stirring rod 65, the one end of stirring rod 65 is connected with agitator motor 66 through drive belt transmission, agitator motor 66's fixed surface is connected with mounting bracket 67, the one end of mounting bracket 67 is passed through hinge activity and is articulated on washing bucket 62 surfaces, the other end activity of mounting bracket 67 articulates there is pneumatic rod 68, the one end activity of pneumatic rod 68 articulates in washing bucket 62 bottom one side.

Specifically, after the roasted catalyst and the corresponding mixed liquid are mixed and then are placed into the cleaning barrel 62, after the barrel cover 64 is sealed, the stirring rod 65 is driven to stir after the stirring motor 66 is opened, on one hand, the mounting frame 67 provides installation for the stirring motor 66, on the other hand, when the barrel cover 64 is opened, the mounting frame 67 drives the pneumatic rod 68 to operate to play a supporting role,

in this embodiment: the inner wall of washing bucket 62 inlays and is equipped with heating ring 621, and the one end fixedly connected with heater of heating ring 621 washs the inside fixedly connected with inner bag 622 of bucket 62, and the fixed surface of bung 64 is connected with temperature sensor 641, and one side fixedly connected with pressure sensor 642 of temperature sensor 641, pressure release valve 643 has been seted up to one side of pressure sensor 642.

Specifically, when heating is performed, the heater heats the heating ring 621 after being powered on, so as to heat the inner container 622, the liquid inside the inner container 622 is heated along with the liquid, the temperature sensor 641 displays the temperature inside the inner container 622 in the heating process, the pressure sensor 642 simultaneously detects the pressure inside the inner container 622, and when the pressure is set to a large force value, the pressure release valve 643 automatically opens the valve to reduce the pressure, wherein the model of the temperature sensor is "SIN-WZP-Pt 100", and the model of the pressure sensor is "MIK-P300".

In this embodiment: draw mechanism 7 and include the square pole 71 of fixed mounting at a supporting bench 1 top, the top fixedly connected with support frame 72 of square pole 71, a plurality of holes have been seted up on the surface of support frame 72, and downthehole one-level extraction bucket 73, second grade extraction bucket 74 and tertiary extraction bucket 75 of inlaying respectively are equipped with, through the UNICOM of UNICOM 76 between the adjacent extraction bucket.

Specifically, the reducing solution filtered in the filtering tank 8 is placed in the primary extraction barrel 73, the metal is separated out by adding a reagent solution which reacts with the metal to be extracted, the remaining reducing solution flows into the secondary extraction barrel 74 through the communicating pipe 76, the reagent solution is also added to separate out the corresponding metal, and the remaining reducing solution enters the tertiary extraction barrel 75 to be separated out for the last time.

In this embodiment: the surfaces of the round rods 61 are made of corrosion-resistant materials.

Specifically, the round bar 61 made of an anticorrosive material can prevent corrosion by the reducing liquid discharged from the washing mechanism 6.

In this embodiment: the other side of the supporting table 1 is fixedly provided with a PLC controller, the heating ring 621 is electrically connected with the heater, the driving motor 47, the rotating motor 57, the stirring motor 66, the temperature sensor 641 and the pressure sensor 642 are electrically connected with the PLC controller, and the PLC controller is connected with an external power supply.

Specifically, when the PLC controller is connected with an external power supply, the PLC controller controls the electric equipment to work, and when the PLC controller is disconnected with the power supply, the equipment stops running.

Meanwhile, the invention also provides a device for efficiently purifying precious metals in the waste automobile exhaust catalyst, which comprises the following operation steps:

s1, crushing and grinding the waste automobile exhaust catalyst to 180-200 meshes.

And S2, mixing the waste automobile exhaust catalyst grinding powder with sodium formate, and roasting at 350-550 ℃ for 2-3.5 hours.

S3, adding clear water into the inner container 622, heating to 85-95 ℃, putting the roasted material into the inner container 622, simultaneously adding a sodium borohydride solution accounting for 2-4% of the material by mass, heating, stirring and washing, filtering the obtained reducing solution, mixing the reducing solution with sodium chloride and sodium chlorite acid solution, mixing uniformly, and transferring to a leaching device.

S4: and (4) putting the leaching solution into an extraction mechanism 7, and then separating and purifying to obtain the precious metals.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.