CN115159659A - Arsenic removal device and method for ozone treatment of waste acid stock solution - Google Patents
Arsenic removal device and method for ozone treatment of waste acid stock solution Download PDFInfo
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- CN115159659A CN115159659A CN202210794399.XA CN202210794399A CN115159659A CN 115159659 A CN115159659 A CN 115159659A CN 202210794399 A CN202210794399 A CN 202210794399A CN 115159659 A CN115159659 A CN 115159659A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to the technical field of waste liquid treatment devices, and particularly discloses an arsenic removal device and method for treating waste acid stock solution by ozone, wherein the device comprises a reaction kettle, an aerating device and an air discharging device, and the reaction kettle is provided with an inlet and an outlet; a stirring structure is arranged in the reaction kettle, the stirring structure comprises a power source, a rotating shaft, a first gear and a second gear, the first gear and the second gear are coaxially connected with the rotating shaft, and the diameter of the first gear is larger than that of the second gear; the lower part of the rotating shaft is provided with a connecting rod, and two ends of the connecting rod are respectively provided with a stirring unit; two ends of the connecting rod are respectively and rotatably connected with the rotating shaft and the connecting block; the third gear and the fourth gear are respectively connected with the connecting block in a rotating mode, the third gear and the fourth gear are coaxial, the diameter of the third gear is smaller than that of the fourth gear, and the stirring rod is connected with the lower end of the rotating shaft; the first gear and the second gear can slide along the rotating shaft. The invention solves the problems of troublesome operation and high cost of the prior art for treating the waste acid stock solution.
Description
Technical Field
The invention belongs to the technical field of waste liquid treatment devices, and particularly discloses an arsenic removal device and method for treating waste acid stock solution by ozone.
Background
As the smelting plant contains arsenic pyrite in the process of roasting gold concentrate, arsenic-containing waste acid stock solution can be generated, the problems of high cost, difficult standard reaching and the like exist in the treatment process, even the situation of repeated indexes occurs, and the national emission index requirement is met only by increasing the medicament dosage or diluting and other means.
Disclosure of Invention
The invention aims to provide an arsenic removal device for treating waste acid stock solution by ozone, which solves the problems of troublesome operation and high cost of the prior art for treating the waste acid stock solution.
In order to achieve the above purpose, the basic scheme of the invention is as follows: the arsenic removal device for treating the waste acid stock solution by using ozone comprises a reaction kettle, an inflation device and an air release device, wherein air outlet ends of the inflation device and the air release device are respectively positioned in the reaction kettle, and the reaction kettle is provided with an inlet and an outlet; a stirring structure is arranged in the reaction kettle, the stirring structure comprises a power source, a rotating shaft, a first gear and a second gear, the first gear and the second gear are coaxially connected with the rotating shaft, and the diameter of the first gear is larger than that of the second gear; the rotating shaft is driven by a power source to rotate, a connecting rod is arranged at the lower part of the rotating shaft, stirring units are respectively arranged at two ends of the connecting rod, and each stirring unit respectively comprises a third gear, a fourth gear, a connecting block, a rotating shaft and a stirring rod; two ends of the connecting rod are respectively and rotatably connected with the rotating shaft and the connecting block; the third gear and the fourth gear are respectively in rotary connection with the connecting block, the third gear and the fourth gear are coaxial, the diameter of the third gear is smaller than that of the fourth gear, and the stirring rod is connected with the lower end of the rotary shaft; the first gear and the second gear can slide along the rotating shaft.
The working principle and the beneficial effects of the basic scheme are as follows: when the arsenic removal device for treating the waste acid stock solution is adopted, the waste acid stock solution to be treated is discharged into the reaction kettle through the inlet. Then starting the air charging device, opening the placing opening, and placing the catalyst through the placing opening after opening the placing opening. The aerating device is used for aerating air into the reaction kettle. Then start agitating unit, the power supply is started first when agitating unit starts, drives the pivot rotation after the power supply starts. The connecting rod coaxially connected to the rotating shaft also starts to rotate around the rotating shaft, and the stirring units located at both ends of the connecting rod also start to operate. That is, when the connecting rod rotates, the fourth gear and the third gear at the two ends of the connecting rod also revolve around the rotating shaft. And the fourth gear is meshed with the second gear, so that the fourth gear is meshed with the second gear to rotate when revolving around the rotating shaft, and the stirring rod is driven to rotate through the rotating shaft, so that the stirring rod rotates while revolving, and the waste acid stock solution is stirred to be fully mixed with air. Because first gear and second gear can be followed the pivot and vertically slided, can slide first gear and second gear, thereby make the rotational speed of first gear and the meshing of point gear change the axis of rotation to change the rotational speed of puddler, make air and the more even of spent acid stoste mixture.
And then starting the air bleeder, filling ozone into the reaction kettle through the air bleeder, and contacting and reacting the ozone with the aerated waste acid stock solution. In the waste acid stock solution, arsenic exists mainly in the form of 3-valent arsenic trioxide, and some arsenic exists in the form of particles in the solution and is not dissolved; this all causes great difficulty in environmental compliance of the neutralized slag. The ozone oxidation is used for oxidizing 3-valent arsenic trioxide into 5-valent arsenic pentoxide by utilizing the super-strong oxidizability of the ozone oxidation, and then the arsenic trioxide reacts with ferrous sulfate or lime to produce ferric arsenate (common name scorodite) and calcium arsenate existing in the nature, so that the national environmental protection index requirement is met.
And the connecting sleeve is sleeved outside the rotating shaft and is in vertical sliding fit with the rotating shaft, and the connecting sleeve is fixedly connected with the first gear and the second gear.
Further, the device also comprises a driving part for driving the connecting sleeve to vertically slide.
Further, the driving portion comprises a fixing block, a connecting rod and a driving block, a connecting plate is arranged at the upper end of the connecting sleeve, a sliding groove is formed in the driving block and is in horizontal sliding fit with the connecting plate, one end of the connecting rod is connected with the fixing block, and the other end of the connecting rod is hinged to the driving block.
Furthermore, the device also comprises a driving rod, and one end of the driving rod is connected with one end of the connecting rod.
Further, gas bleeder includes connecting pipe and bleeder, the connecting pipe is connected with the bleeder, still include the pivot, driving motor and arc-shaped fixed plate, pivot and driving motor's output shaft, pivot coaxial coupling has the swivel becket, the coaxial fixed block that is equipped with of swivel becket, fixed block circumference is equipped with a plurality of recesses, the swivel becket still is equipped with connecting sleeve, be equipped with actuating lever and pressure spring in the connecting sleeve, the pressure spring both ends are connected with adapter sleeve bottom portion and actuating lever respectively, the actuating lever tip can pass connecting sleeve and enter into in the recess, connecting block coaxial coupling has the axis of rotation, the axis of rotation connection has the swivel, the tip of bleeder is connected with swivel one end.
The invention aims to provide an arsenic removal method for treating waste acid stock solution by ozone, which comprises the following steps:
(1) Discharging the waste acid stock solution into a reaction kettle;
(2) Filling air into the reaction kettle, adding a catalyst, and stirring; the time for charging air is 20-40h;
(3) Filling ozone into the reaction kettle for 0.5-3h;
(4) And (4) adding ferrous sulfate or lime into the waste acid stock solution obtained in the step (3).
Further, the mass of the catalyst in the step (2) is 1/70-1/50 of the arsenic content in the waste acid stock solution.
Drawings
FIG. 1 is a schematic structural diagram of an arsenic removal device for treating waste acid stock solution with ozone according to a fifth embodiment of the invention;
FIG. 2 is a schematic structural diagram of a fifth embodiment of the arsenic removal device for ozone treatment of waste acid stock solution according to the invention;
FIG. 3 is another schematic structural diagram of an arsenic removal device for treating waste acid stock solution with ozone according to the embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: reaction kettle 1, aerating device 2, air bleeder 3, export 4, import 5, place mouth 6, rotate motor 7, spliced pole 8, first annular half groove 9, second annular half groove 10, spread groove 11, telescopic link 12, connecting rod 13, connecting rod 14, driving block 15, connecting plate 16, connecting sleeve 17, third gear 18, fourth gear 19, second gear 20, first gear 21, connecting rod 22, puddler 23, swivel ring 24, rotate piece 25, recess 26, arc fixed plate 27, actuating lever 28, connecting cylinder 29, pressure spring 30, solid fixed ring 31, arc 32, passageway 33.
A method for removing arsenic from ozone treatment waste acid stock solution comprises the following steps:
(1) Discharging the waste acid stock solution into a reaction kettle;
(2) Filling air into the reaction kettle, adding a catalyst, and stirring; the time for charging air is 20-40h;
(3) Filling ozone into the reaction kettle for 0.5-3h, wherein the mass of the ozone filled in each hour is 1/10000-1/1000 of the arsenic content in the waste acid stock solution;
(4) And (4) adding ferrous sulfate or lime into the waste acid stock solution obtained in the step (3), measuring Ph, and stopping adding the ferrous sulfate or lime until the Ph in the reaction kettle is more than 12.3.
Wherein the mass of the catalyst in the step (2) is 1/70-1/50 of the arsenic content in the waste acid stock solution.
The arsenic content, amount of catalyst added, aeration time and heavy ozone time of spent acid stock solutions in examples one to four, respectively, are shown in table 1:
TABLE 1
| Arsenic content (mg/L) | Amount of catalyst added (m: as) | Time (minute) for charging ozone | |
| Example one | 11814 | 1:50 | 40 |
| Example two | 13668 | 1:50 | 60 |
| EXAMPLE III | 9052 | 1:50 | 70 |
| Example four | 10906 | 1:50 | 120 |
The filtrate contents and the toxicity of the neutralized slag of the first to fourth examples were measured, and the results are shown in table 2:
TABLE 2
| Arsenic content (mg/L) | Amount of catalyst added (m: as) | Time (minute) for charging ozone | |
| Example one | The content of filtrate is mg/L | Neutralizing slag toxicity mg/L | Toxicity mg/L after several days |
| Example two | 3.39 | 1.45 | |
| EXAMPLE III | 3.13 | 1.31 | 1.23 |
| Example four | 5.75 | 1.45 | 1.66 |
As can be seen from Table 2, with the scheme of this example, arsenic is present in the spent acid stock solution mainly in the form of 3-valent arsenic trioxide, and some is present in the solution in the form of particles. The ozone oxidation is used for oxidizing 3-valent arsenic trioxide into 5-valent arsenic pentoxide by utilizing the super-strong oxidizability of the ozone oxidation, and then the arsenic trioxide reacts with ferrous sulfate or lime to produce ferric arsenate (common name of scorodite) and calcium arsenate existing in the nature. The toxicity of the slag can be completely controlled below the national environmental protection standard of 2.5mg/L, and the toxicity of the neutralized slag after several days is also relatively stable and has a descending trend.
EXAMPLE five
Referring to fig. 1-3, the present embodiment discloses an arsenic removal device for ozone treatment of waste acid stock solution, which includes a reaction kettle 1, an inflation device 2, and an air release device 3, wherein air outlet ends of the inflation device 2 and the air release device 3 are respectively located in the reaction kettle 1, the reaction kettle 1 is provided with an inlet 5 and an outlet 4, and the inlet 5 and the outlet 4 of the reaction kettle 1 are respectively in threaded connection with a sealing cover. The upper end of the reaction kettle 1 is also provided with a placing opening 6, and the place of the placing opening 6 is connected with a cover plate for sealing the placing opening 6 in a sliding way. A stirring structure is arranged in the reaction kettle 1, the stirring structure comprises a power source, a rotating shaft, a first gear 21 and a second gear 20, and the power source in the embodiment adopts a rotating motor 7. The arsenic removal device in the embodiment further comprises a connecting sleeve 17 and a connecting column 8, and the connecting column 8 is coaxially connected with the rotating shaft. The 8 circumference of spliced pole is equipped with annular chute, and annular chute includes first annular half groove 9, second annular half groove 10 and two spread grooves 11, and first annular half groove 9 is located second annular half groove 10 upper end. Two ends of the two connecting grooves 11 are respectively connected with two ends of the first annular half groove 9 and the second annular half groove 10. The connecting sleeve 17 is sleeved outside the rotating shaft and is in vertical sliding fit with the rotating shaft, the connecting sleeve 17 is fixedly connected with the first gear 21 and the second gear 20, and the first gear 21 and the second gear 20 are coaxially arranged. The first gear 21 has a larger diameter than the second gear 20.
The arsenic removal device in this embodiment further comprises a driving part for driving the connecting sleeve 17 to slide vertically. The driving part comprises a fixed block, a connecting rod 13, a connecting support rod 14 and a driving block 15, and the fixed block is fixedly connected with the inner wall of the reaction kettle 1. The upper end of the connecting sleeve 17 is provided with a connecting plate 16, the driving block 15 is provided with a sliding groove, the sliding groove is in horizontal sliding fit with the connecting plate 16, one end of the connecting support rod 14 penetrates through the fixing block and is connected with one end of the connecting rod 13, and the other end of the connecting support rod 14 is hinged with the driving block 15. The end part of the connecting rod 13 is also provided with an expansion link 12, and the end part of the expansion link 12 is positioned in the annular chute and is in sliding fit with the annular chute.
The lower part of the rotating shaft is provided with a connecting rod 22, two ends of the connecting rod 22 are respectively provided with a stirring unit, and each stirring unit respectively comprises a third gear 18, a fourth gear 19, a connecting block, a rotating shaft and a stirring rod 23; the two ends of the connecting rod 22 are respectively connected with the connecting blocks, and the connecting blocks are rotatably connected with the rotating shaft. The third gear 18 and the fourth gear 19 are respectively and coaxially fixedly connected with the rotating shaft, the diameter of the third gear 18 is smaller than that of the fourth gear 19, the stirring rod 23 is connected with the lower end of the rotating shaft, the third gear 18 can be meshed with the first gear 21, and the fourth gear 19 can be meshed with the second gear 20.
The inflating device 2 comprises a connecting pipe, an air discharging pipe, a connecting shaft, a driving motor, a rotating ring 24 and an arc-shaped fixing plate 27, wherein the connecting pipe is connected with the air discharging pipe, the connecting shaft is connected with an output shaft of the driving motor, and the connecting shaft drives the rotating ring 24 to rotate. A connecting cylinder 29 is further arranged on the side portion of the rotating ring 24, a driving rod 28 and a pressure spring 30 are arranged in the connecting cylinder 29, and two ends of the pressure spring 30 are connected with the bottom of the connecting sleeve 17 and the driving rod 28 respectively. The rotating ring 24 is coaxially connected with a rotating member 25, the rotating member 25 is circumferentially provided with a plurality of grooves 26, and the end of a driving rod 28 can pass through a connecting cylinder 29 and enter the grooves 26. The connecting piece coaxial coupling has the axis of rotation, and the rotation axis coupling has the rotary rod, and the tip and the rotary rod one end of gas release pipe are connected.
The arsenic removal device in the embodiment further comprises a connecting frame, and the connecting frame is shaped like a triangle. The two ends of the connecting frame are respectively connected with the air release pipe, and the lower end of the connecting frame is connected with the free end of the rotating rod. Still be equipped with solid fixed ring 31 in reation kettle 1, gu fixed ring 31 inside circumference evenly is equipped with a plurality of arcs 32, and arcs 32 and solid fixed ring 31 form passageway 33, and the width in passageway 33 middle section is less than both ends and is less than the diameter of gas release pipe. The air release pipe in the embodiment adopts a hose, the number of the arc-shaped plates 32 and the grooves 26 is more than 2, and the number of the arc-shaped plates 32 is different from that of the grooves 26.
The specific implementation mode is as follows: when the arsenic removal device for treating the waste acid stock solution is adopted, the waste acid stock solution to be treated is discharged into the reaction kettle 1 through the inlet 5, and then the inlet 5 is sealed by the cover body. The inflator 2 is started, the placing port 6 is opened, and the catalyst is placed through the placing port 6 after the placing port 6 is opened. The aerating device 2 is used for aerating air into the reaction kettle 1. Air enters the air release pipe through the connecting pipe and enters the reaction kettle 1 through the air release pipe. The driving motor is started, the driving motor drives the rotating ring 24 to rotate after being started, and the connecting cylinder 29 connected with the rotating ring 24 revolves along with the connecting ring. When the connecting cylinder 29 rotates, the driving rod 28 connected to the connecting cylinder 29 revolves together with the connecting cylinder 29, and at this time, the end of the driving rod 28 is away from the middle of the rotating ring 24 by the action of the pressure spring 30 and the centrifugal force, and the driving rod 28 does not contact the rotating member 25. When the driving rod 28 rotates to the arc-shaped fixing plate 27, the end of the driving rod 28 contacts with the arc-shaped valley plate and moves towards the connecting cylinder 29 under the action of the arc-shaped fixing plate 27, and the driving rod 28 enters the groove 26 and drives the rotating piece 25 to rotate for a certain angle. The rotating member 25 rotates to drive the rotating shaft to rotate, and the rotating rod connected with the rotating shaft drives the air discharging pipe to rotate by a certain angle. When the driving rod 28 is not in contact with the arc fixing plate 27 any more along with the rotation of the driving rod 28, the driving rod 28 slides outwards under the action of the compression spring 30, and the rotating part 25 is not driven to rotate any more. At this time, drive rod 28 is also stationary. When the driving rod 28 contacts the arc-shaped fixing plate 27, the driving rod 28 drives the rotating member 25 to rotate, so that the rotating rod drives the air release pipe to rotate.
When the bleed pipe rotated, when the bleed pipe entered into passageway 33 department, the bleed pipe middle part was extruded, and the speed that the air flowed out from the bleed pipe becomes fast, and is more dispersion when flowing out moreover, makes more even that air and spent acid stoste mix.
The stirring device is started, the rotating motor 7 is started firstly when the stirring device is started, and the rotating motor 7 drives the rotating shaft to rotate after being started. The connection plate 16, which is coaxially connected to the rotation shaft, rotates around the rotation shaft, and the stirring units located at both ends of the connection rod 22 also start to operate. That is, when the connecting rod 22 rotates, the fourth gear 19 and the third gear 18 at both ends thereof also revolve around the rotation shaft. And the fourth gear 19 is meshed with the second gear 20, so that the fourth gear 19 is meshed with the second gear 20 to rotate when revolving around the rotating shaft, and the stirring rod 23 is driven to rotate through the rotating shaft, so that the stirring rod 23 rotates while revolving, and the waste acid stock solution is stirred to be fully mixed with air.
The connecting column 8 rotates while the rotating shaft rotates, and the telescopic rod 12 is in sliding fit with the annular chute. When the end of the telescopic rod 12 is inside the first annular half-groove 9, the connecting rod 13 is stationary. With the continuous rotation of the connecting column 8, when the connecting groove 11 of the connecting column 8 rotates to the telescopic rod 12, the telescopic rod 12 enters into the connecting groove 11 and enters into the second annular half groove 10, and at this time, the end of the connecting rod 13 rotates and drives the driving block 15 to move upwards through the connecting support rod 14. The driving block 15 drives the connecting plate 16 and the connecting sleeve 17 to move upwards, the connecting sleeve 17 drives the first gear 21 and the second gear 20 to move upwards, at this time, the first gear 21 is meshed with the third gear 18, the stirring rod 23 rotates under the action of the third gear 18 and the first gear 21, and the rotating speed is changed. This allows for more uniform mixing of the air with the spent acid liquor.
And then starting the air bleeder 3, filling ozone into the reaction kettle 1 through the air bleeder 3, and contacting and reacting the ozone with the aerated waste acid stock solution. In the waste acid stock solution, arsenic exists mainly in the form of 3-valent arsenic trioxide, and some arsenic exists in the form of particles in the solution and is not dissolved; this all causes great difficulty in environmental compliance of the neutralized slag. The ozone oxidation is used for oxidizing 3-valent arsenic trioxide into 5-valent arsenic pentoxide by utilizing the super-strong oxidizability of the ozone oxidation, and then the arsenic trioxide reacts with ferrous sulfate or lime to produce ferric arsenate and calcium arsenate existing in the nature, so that the national environmental protection index requirements are met.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and/or features of the schemes is not described herein in excess. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several variations and modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (8)
1. A remove arsenic device for ozone treatment spent acid stoste, its characterized in that: the device comprises a reaction kettle, an inflation device and a deflation device, wherein the air outlet ends of the inflation device and the deflation device are respectively positioned in the reaction kettle, the reaction kettle is provided with an inlet and an outlet, and the inlet and the outlet are respectively provided with a cover body; a stirring structure is arranged in the reaction kettle, the stirring structure comprises a power source, a rotating shaft, a connecting sleeve, a first gear and a second gear, and the power source is fixedly connected with the inner wall of the reaction kettle; the first gear and the second gear are coaxially arranged, and the diameter of the first gear is larger than that of the second gear; the rotating shaft is driven by a power source to rotate, a connecting rod is arranged at the lower part of the rotating shaft, stirring units are respectively arranged at two ends of the connecting rod, and each stirring unit respectively comprises a third gear, a fourth gear, a connecting block, a rotating shaft and a stirring rod; two ends of the connecting rod are respectively and rotatably connected with the rotating shaft and the connecting block; the third gear and the fourth gear are respectively connected with the connecting block in a rotating mode, the third gear and the fourth gear are coaxially arranged, the diameter of the third gear is smaller than that of the fourth gear, and the stirring rod is connected with the lower end of the rotating shaft; the connecting sleeve is sleeved outside the rotating shaft and is in vertical sliding fit with the rotating shaft, and the connecting sleeve is fixedly connected with the first gear and the second gear.
2. The arsenic removal device for ozone treatment of spent acid liquor according to claim 1, wherein: the device also comprises a driving part for driving the connecting sleeve to vertically slide.
3. The arsenic removal device for ozone treatment of spent acid liquor according to claim 2, wherein: the driving part comprises a fixed block, a connecting rod, a connecting support rod and a driving block, and the fixed block is fixedly connected with the inner wall of the reaction kettle; the connecting sleeve upper end is equipped with the connecting plate, and the driving block is equipped with the spout, spout and connecting plate horizontal sliding fit, and connecting rod one end is passed the fixed block and is connected with connecting rod one end, and the connecting rod other end is articulated with the driving block.
4. The arsenic removal device for ozone treatment of spent acid liquor according to claim 3, wherein: the driving part also comprises a connecting column which is coaxially connected with the rotating shaft. The spliced pole circumference is equipped with annular chute, and annular chute includes first annular half groove, second annular half groove and two spread grooves, and first annular half groove is located second annular half groove upper end. Two ends of the two connecting grooves are respectively connected with two ends of the first annular half groove and two ends of the second annular half groove; the end part of the connecting rod is also provided with a telescopic rod, and the end part of the telescopic rod is positioned in the annular chute and is in sliding fit with the annular chute.
5. The arsenic removal device for ozone treatment of spent acid liquor according to claim 4, wherein: the power source is a rotating motor.
6. The arsenic removal device for ozone treatment of spent acid liquor according to claim 5, wherein: the inflating device comprises a connecting pipe, an air discharging pipe, a connecting shaft, a driving motor, a rotating ring and an arc-shaped fixing plate, wherein the connecting pipe is connected with the air discharging pipe, the connecting shaft is connected with an output shaft of the driving motor, and the connecting shaft drives the rotating ring to rotate; a connecting cylinder body is further arranged on the side part of the rotating ring, a driving rod and a pressure spring are arranged in the connecting cylinder body, and two ends of the pressure spring are respectively connected with the bottom of the connecting cylinder body and the driving rod; the rotating ring is coaxially connected with a rotating piece, the rotating piece is circumferentially provided with a plurality of grooves, and the end part of the driving rod can penetrate through the connecting cylinder body and enter the grooves; the connecting piece is coaxially connected with a rotating shaft, the rotating shaft is connected with a rotating rod, and the end part of the air release pipe is connected with one end of the rotating ring.
7. A method for removing arsenic from waste acid stock solution treated by ozone is characterized by comprising the following steps: the method comprises the following steps:
(1) Discharging the waste acid stock solution into a reaction kettle;
(2) Filling air into the reaction kettle, adding a catalyst, and stirring; the time for charging air is 20-40h;
(3) Filling ozone into the reaction kettle for 0.5-3h, wherein the mass of the ozone filled in each hour is 1/10000-1/1000 of the arsenic content in the waste acid stock solution;
(4) And (4) adding ferrous sulfate or lime into the waste acid stock solution obtained in the step (3), and measuring Ph at the same time, wherein the ferrous sulfate or lime is stopped being added until the Ph in the reaction kettle is more than 12.3.
8. A method as claimed in claim 7 for arsenic removal from ozone treatment spent acid liquor, characterized in that: the mass of the catalyst in the step (2) is 1/70-1/50 of the arsenic content in the waste acid stock solution.
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