CN215782051U

CN215782051U - Concentrated acid recovery equipment for metal surface treatment

Info

Publication number: CN215782051U
Application number: CN202121228138.9U
Authority: CN
Inventors: 张帅
Original assignee: Dalian Baliu Metal Surface Treatment Co ltd
Current assignee: Dalian Baliu Metal Surface Treatment Co ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2022-02-11
Anticipated expiration: 2031-06-02

Abstract

The utility model relates to the technical field of concentrated acid recovery, in particular to concentrated acid recovery equipment for metal surface treatment, which improves the filtration efficiency of sulfuric acid wastewater by arranging a filter screen, drives a sealing plate to move downwards by controlling the contraction length of a plurality of groups of electric telescopic columns, opens the bottom of a cylinder body after the sealing plate moves downwards, so that the sealing plate conveys scraps to the top end of a second partition plate, improves the convenience of discharging the scraps in a cavity, drives a rotating shaft to rotate by opening a first motor, drives a brush to rotate by rotating the rotating shaft, cleans the inner side wall of the filter screen after the brush rotates, reduces the blockage of metal scraps on the filter screen, and improves the practicability of the device; the device comprises a box body, a first partition plate, a barrel body, a supercharging device, a filter screen, a water inlet pipe, a second partition plate, a plurality of groups of electric telescopic columns, a sealing plate, a sealing gasket, a first motor, a rotating shaft, a fixing frame, a brush and a plurality of groups of sealing doors, wherein a cavity is arranged in the box body, and a water outlet and a plurality of groups of material openings are arranged in the cavity.

Description

Concentrated acid recovery equipment for metal surface treatment

Technical Field

The utility model relates to the technical field of concentrated acid recovery, in particular to concentrated acid recovery equipment for metal surface treatment.

Background

A concentrated acid recovery apparatus for metal surface treatment is a concentrated acid recovery auxiliary device for metal surface treatment, which is widely used in the field of concentrated acid recovery; the existing concentrated acid recovery equipment for metal surface treatment is found in use, sulfuric acid is widely applied to industries such as chemical industry and steel, in many production processes, a large amount of sulfuric acid is discharged along with acid-containing waste water, and the waste water is discharged to the environment without being treated, so that not only can water or soil be acidified, but also the ecological environment is damaged, and a large amount of resources are wasted.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides concentrated acid recovery equipment for treating the metal surface, which is provided with a filter screen, improves the filtration efficiency of sulfuric acid wastewater, controls the contraction length of a plurality of groups of electric telescopic columns to drive a sealing plate to move downwards, opens the bottom of a cylinder body after the sealing plate moves downwards, so that the sealing plate conveys scraps to the top end of a second partition plate, improves the convenience of discharging the scraps in a cavity, drives a rotating shaft to rotate by opening a first motor, drives a brush to rotate by rotating the rotating shaft, cleans the inner side wall of the filter screen by the rotating shaft, reduces the blockage of the filter screen by metal scraps, and improves the practicability of the device.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which comprises a box body, a first clapboard, a barrel body, a supercharging device, a filter screen, a water inlet pipe, a second clapboard, a plurality of groups of electric telescopic columns, a sealing plate, a sealing gasket, a first motor, a rotating shaft, a fixing frame, a brush and a plurality of groups of sealing doors, wherein a cavity is arranged in the box body, a water outlet and a plurality of groups of material ports are arranged in the cavity, the water outlet and the plurality of groups of material outlets are communicated with the cavity, the extension of the first clapboard is connected with the inner side wall of the box body and arranged in the cavity, the lower part of the barrel body is fixedly arranged on the inner side wall of the first clapboard, the bottom end of the barrel body is provided with an opening communicated with the barrel body, the top end of the barrel body is connected with the inner side wall of the box body, the supercharging device is arranged at the top end of the box body and communicated with the barrel body, the filter screen is arranged on the outer side wall of the barrel body, and the interior of the barrel body is communicated with the cavity through the filter screen, the water inlet pipe is arranged on the outer side wall of the box body, the output end of the water inlet pipe is communicated with the interior of the box body, the extension of the second partition board is connected with the inner side wall of the box body and is arranged in the cavity, the second partition board is arranged below the first partition board, the bottoms of the multiple groups of electric telescopic columns are all connected with the inner side wall of the box body, the upper parts of the multiple groups of electric telescopic columns can slide up and down to pass through the interior of the second partition board, the top ends of the multiple groups of electric telescopic columns are all connected with the bottom end of the sealing plate, the top end of the sealing plate is tightly attached to the bottom end opening of the box body, the sealing gasket is arranged at the top end of the sealing plate and is embedded in the sealing plate, the bottom end of the first motor is connected with the inner side wall of the box body, the bottom end of the rotating shaft is connected with the output end of the top end of the first motor, the upper part of the rotating shaft can respectively rotatably pass through the interiors of the second partition board and the sealing plate, the sealing plate can slide up and down on the outer side wall of the rotating shaft, the extension of the fixing frame is connected with the inner side wall of the box body, the top of pivot and the bottom swivelling joint of mount, brush fixed mounting are on the lateral wall of pivot to the extension of brush pastes tightly with the inside wall of filter screen, and the multiunit is closed the door and is communicate the multiunit discharge opening department that sets up at the cavity respectively.

The utility model discloses concentrated acid recovery equipment for metal surface treatment, which comprises a support frame, a slide rail, a piston plate, a threaded sleeve and a second motor, wherein the bottom end of the support frame is connected with the top end of a box body, the slide rail is arranged on the inner side wall of a barrel body, the piston plate can be arranged on the inner side wall of the slide rail in a vertically sliding mode, the piston plate can be arranged in the barrel body in a vertically sliding mode, the bottom end of the threaded sleeve is connected with the top end of the piston plate, an opening is formed in the top end of the threaded sleeve, the second motor is arranged at the top end of the support frame, a rotatable stud is longitudinally arranged at the output end of the bottom end of the second motor, and the bottom of the stud can rotate and extend into the threaded sleeve through the opening.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which further comprises a water storage tank, a water pump, a drain pipe and an activated carbon layer, wherein a cavity is arranged in the water storage tank, a discharge port and an exhaust port are arranged in the cavity, the discharge port and the exhaust port are communicated with the cavity, the water pump is arranged on the outer side wall of the box body and communicated with the drain port of the cavity, the input end of the drain pipe is communicated with the output end of the water pump, the output end of the water pump is communicated with the interior of the cavity, and the extension of the activated carbon layer is connected with the inner side wall of the box body and communicated with the exhaust port of the cavity.

The concentrated acid recovery equipment for metal surface treatment further comprises two groups of sealing rings, wherein the two groups of sealing rings are respectively arranged at the bottom ends of the second partition plate and the sealing plate, and are sleeved on the outer side wall of the rotating shaft.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which further comprises an observation window, wherein the observation window is arranged on the outer side wall of the box body and communicated with the inside of the cavity.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which further comprises a liquid level sensor, wherein the liquid level sensor is arranged on the outer side wall of a water storage tank and is communicated with the cavity.

According to the concentrated acid recovery device for metal surface treatment, the top end of the second partition plate is provided with the groove, and the size of the groove is matched with that of the sealing plate.

Compared with the prior art, the utility model has the beneficial effects that: firstly, sulfuric acid wastewater to be treated is discharged into a barrel through a water inlet pipe, the sulfuric acid wastewater is filtered through a filter screen, the filtered sulfuric acid wastewater enters a cavity, filtered metal residues are deposited at the bottom of the barrel, the filter screen is arranged, the filtering efficiency of the sulfuric acid wastewater is improved, when debris in the barrel needs to be cleaned, a sealing plate is driven to move downwards by controlling the contraction length of a plurality of groups of electric telescopic columns, the bottom of the barrel is opened after the sealing plate moves downwards, the debris is conveyed to the top end of a second partition plate by the sealing plate, the debris on the upper portion of a sliding rail is cleaned by opening a plurality of groups of sealing doors, the convenience of debris discharge in the cavity is improved, a rotating shaft is driven to rotate by opening a first motor, the rotating shaft rotates to drive a brush, so that the inner side wall of the filter screen is cleaned after the brush rotates, and the blockage of the metal debris to the filter screen is reduced, the filtering speed of the filter screen is improved, and the practicability of the device is improved.

Drawings

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

FIG. 2 is an enlarged schematic view of the connection between the cylinder and the filter net;

FIG. 3 is an enlarged view of the structure of the sealing plate connected to the rotary shaft;

FIG. 4 is an enlarged view of the structure of the connection of the shaft to the brush or the like;

FIG. 5 is an enlarged schematic view of the piston plate in connection with a threaded bushing or the like;

in the drawings, the reference numbers: 1. a box body; 2. a first separator; 3. a barrel; 4. a filter screen; 5. a water inlet pipe; 6. a second separator; 7. an electric telescopic column; 8. a sealing plate; 9. a gasket; 10. a first motor; 11. a rotating shaft; 12. a fixed mount; 13. a brush; 14. a closing door; 15. a support frame; 16. a slide rail; 17. a piston plate; 18. a threaded bushing; 19. a second motor; 20. a stud; 21. a water storage tank; 22. a water pump; 23. a drain pipe; 24. an activated carbon layer; 25. a seal ring; 26. an observation window; 27. a liquid level sensor.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

As shown in fig. 1 to 5, the concentrated acid recovery device for metal surface treatment of the present invention comprises a box body 1, a first partition plate 2, a cylinder body 3, a pressurizing device, a filter screen 4, a water inlet pipe 5, a second partition plate 6, a plurality of sets of electric telescopic columns 7, a sealing plate 8, a sealing gasket 9, a first motor 10, a rotating shaft 11, a fixing frame 12, a brush 13 and a plurality of sets of closing doors 14, wherein a chamber is arranged in the box body 1, a water outlet and a plurality of sets of material ports are arranged in the chamber, the extension of the first partition plate 2 is connected with the inner side wall of the box body 1 and arranged in the chamber, the lower part of the cylinder body 3 is fixedly arranged on the inner side wall of the first partition plate 2, the bottom end of the cylinder body 3 is provided with an opening communicated with the interior of the cylinder body 3, the top end of the cylinder body 3 is connected with the inner side wall of the box body 1, the pressurizing device is arranged at the top end of the box body 1 and communicated with the interior of the cylinder body 3, the filter screen 4 is arranged on the outer side wall of the barrel 3, the interior of the barrel 3 is communicated with the cavity through the filter screen 4, the water inlet pipe 5 is arranged on the outer side wall of the box body 1, the output end of the water inlet pipe 5 is communicated with the interior of the barrel 3, the extension of the second partition board 6 is connected with the inner side wall of the box body 1 and is arranged in the cavity, the second partition board 6 is arranged below the first partition board 2, the bottom ends of a plurality of groups of electric telescopic columns 7 are all connected with the inner side wall of the box body 1, the upper parts of the plurality of groups of electric telescopic columns 7 can vertically slide through the interior of the second partition board 6, the top ends of the plurality of groups of electric telescopic columns 7 are all connected with the bottom end of the sealing plate 8, the top end of the sealing plate 8 is tightly attached to the bottom end opening of the barrel 3, the sealing gasket 9 is arranged at the top end of the sealing plate 8 and is embedded into the sealing plate 8, the bottom end of the first motor 10 is connected with the inner side wall of the box body 1, the bottom end of the rotating shaft 11 is connected with the output end of the first motor 10, the upper part of the rotating shaft 11 can respectively and rotatably penetrate through the second partition plate 6 and the inside of the sealing plate 8, the sealing plate 8 can slide up and down on the outer side wall of the rotating shaft 11, the extension of the fixing frame 12 is connected with the inner side wall of the barrel 3, the top end of the rotating shaft 11 is rotatably connected with the bottom end of the fixing frame 12, the brush 13 is fixedly arranged on the outer side wall of the rotating shaft 11, the extension of the brush 13 is tightly attached to the inner side wall of the filter screen 4, and a plurality of groups of closed doors 14 are respectively communicated and arranged at a plurality of groups of discharge openings of the chamber; firstly, sulfuric acid wastewater to be treated is discharged into a barrel 3 through a water inlet pipe 5, the sulfuric acid wastewater is filtered through a filter screen 4, the filtered sulfuric acid wastewater enters a cavity, filtered metal residues are deposited at the bottom of the barrel 3, the filter screen 4 is arranged, the filtering efficiency of the sulfuric acid wastewater is improved, when debris in the barrel 3 needs to be cleaned, a sealing plate 8 is driven to move downwards by controlling the contraction length of a plurality of groups of electric telescopic columns 7, the bottom of the barrel 3 is opened after the sealing plate 8 moves downwards, so that the debris is conveyed to the top end of a second partition plate 6 by the sealing plate 8, the debris at the upper part of a sliding rail 16 is cleaned by opening a plurality of groups of sealing doors 14, the convenience of debris discharge in the cavity is improved, a rotating shaft 11 is driven to rotate by opening a first motor 10, the rotating shaft 11 rotates to drive a brush 13 to rotate, so that the inner side wall of the filter screen 4 is cleaned after the brush 13 rotates, reduce the jam of metal debris to filter screen 4, improve the filter speed of filter screen 4, improve the practicality of device.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which comprises a support frame 15, a slide rail 16, a piston plate 17, a threaded sleeve 18 and a second motor 19, wherein the bottom end of the support frame 15 is connected with the top end of a box body 1, the slide rail 16 is installed on the inner side wall of a cylinder body 3, the piston plate 17 can be installed on the inner side wall of the slide rail 16 in a vertical sliding manner, the piston plate 17 can be arranged in the cylinder body 3 in a vertical sliding manner, the bottom end of the threaded sleeve 18 is connected with the top end of the piston plate 17, the top end of the threaded sleeve 18 is provided with an opening, the second motor 19 is installed at the top end of the support frame 15, the output end of the bottom end of the second motor 19 is longitudinally provided with a rotatable stud 20, and the bottom of the stud 20 can rotate to extend into the interior of the threaded sleeve 18 through the opening; it is rotatory to drive double-screw bolt 20 through opening second motor 19, double-screw bolt 20 is rotatory to make threaded sleeve 18 downstream, threaded sleeve 18 promotes piston plate 17 and slides downwards after the downstream, thereby make piston plate 17 extrude the inside air of barrel 3, the flow velocity that the inside sulphuric acid waste water of barrel 3 passed filter screen 4 is accelerated to the extruded air, thereby improve the filter speed of filter screen 4 to sulphuric acid waste water, reduce the jam condition of filter screen 4, the treatment effeciency of the device to sulphuric acid waste water is improved, the practicality of the device is improved.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which further comprises a water storage tank 21, a water pump 22, a water drainage pipe 23 and an activated carbon layer 24, wherein a cavity is arranged in the water storage tank 21, a discharge port and an exhaust port are arranged in the cavity, the discharge port and the exhaust port are communicated with the cavity, the water pump 22 is arranged on the outer side wall of the box body 1 and communicated with the water drainage port arranged in the cavity, the input end of the water drainage pipe 23 is communicated with the output end of the water pump 22, the output end of the water pump 22 is communicated with the inside of the cavity, and the extension of the activated carbon layer 24 is connected with the inner side wall of the box body 1 and communicated with the exhaust port arranged in the cavity; extract the sulphuric acid waste water after filtering in to the cavity through opening water pump 22, make the waste water after the extraction discharge to water storage tank 21 inside through the transport of drain pipe 23, improve the convenience of concentrated treatment after sulphuric acid waste water stores, through setting up activated carbon layer 24, volatile gas filter effect when improving waste water discharge reduces the sulphuric acid waste water volatile gas to the pollution of environment, improves the environmental protection effect of device.

The concentrated acid recovery equipment for metal surface treatment further comprises two groups of sealing rings 25, wherein the two groups of sealing rings 25 are respectively arranged at the bottom ends of the second partition plate 6 and the sealing plate 8, and the two groups of sealing rings 25 are sleeved on the outer side wall of the rotating shaft 11; through setting up two sets of sealing washer 25, improve the sealed effect of second baffle 6 and closing plate 8 to pivot 11, prevent that sulphuric acid waste water from revealing, improve the safety in utilization of device, improve the practicality.

The concentrated acid recovery equipment for metal surface treatment further comprises an observation window 26, wherein the observation window 26 is arranged on the outer side wall of the box body 1 and is communicated with the inside of the cavity; through setting up observation window 26, be convenient for look over the sulphuric acid waste water treatment condition in the chamber, be convenient for in time clear up the inside piece of barrel 3, improve the convenience of using.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which further comprises a liquid level sensor 27, wherein the liquid level sensor 27 is arranged on the outer side wall of the water storage tank 21 and is communicated with the cavity; the water level in the water storage tank 21 is measured by arranging the liquid level sensor 27, so that the sulfuric acid wastewater is prevented from overflowing from the inside of the water storage tank 21, and the use safety of the device is improved.

According to the concentrated acid recovery device for metal surface treatment, the top end of the second partition plate 6 is provided with the groove, and the size of the groove is matched with that of the sealing plate 8; through setting up the recess, make the closing plate 8 descend the back and imbed inside the recess of second baffle 6 to improve the convenience of the metal debris clearance at 6 tops of second baffle, reduce the clearance and hinder, improve the practicality.

The utility model relates to concentrated acid recovery equipment for metal surface treatment, which is operated, sulfuric acid wastewater to be treated is firstly discharged into a cylinder 3 through a water inlet pipe 5, the sulfuric acid wastewater is filtered through a filter screen 4, the filtered sulfuric acid wastewater enters a cavity, filtered metal residues are deposited at the bottom of the cylinder 3, when debris in the cylinder 3 needs to be cleaned, a plurality of groups of electric telescopic columns 7 are controlled to contract to drive a sealing plate 8 to move downwards, the bottom of the cylinder 3 is opened after the sealing plate 8 moves downwards, the debris in the cylinder 3 falls to the top end of a second partition plate 6, the debris at the upper part of a slide rail 16 is cleaned by opening a plurality of groups of sealing doors 14, a rotating shaft 11 is driven to rotate by opening a first motor 10, the rotating shaft 11 rotates to drive a brush 13 to rotate, so that the inner side wall of the filter screen 4 is cleaned after the brush 13 rotates, then, the stud 20 is driven to rotate by turning on the second motor 19, the threaded sleeve 18 moves downwards by rotating the stud 20, the piston plate 17 is pushed to slide downwards by the threaded sleeve 18 after moving downwards, so that the piston plate 17 extrudes air in the cylinder 3, the flow speed of sulfuric acid wastewater in the cylinder 3 passing through the filter screen 4 is accelerated by the extruded air, then the sulfuric acid wastewater filtered in the cavity is extracted by turning on the water pump 22, and the extracted wastewater is discharged into the water storage tank 21 through the delivery of the drain pipe 23.

According to the concentrated acid recovery equipment for metal surface treatment, the installation mode, the connection mode or the arrangement mode are common mechanical modes, and the concentrated acid recovery equipment can be implemented as long as the beneficial effects of the concentrated acid recovery equipment can be achieved; the electric telescopic column 7, the first motor 10, the second motor 19, the water pump 22 and the liquid level sensor 27 of the concentrated acid recovery equipment for metal surface treatment are purchased from the market, and technicians in the industry only need to install and operate according to the attached operating instructions.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A concentrated acid recovery device for metal surface treatment is characterized by comprising a box body (1), a first partition plate (2), a cylinder body (3), a supercharging device, a filter screen (4), a water inlet pipe (5), a second partition plate (6), a plurality of groups of electric telescopic columns (7), a sealing plate (8), a sealing gasket (9), a first motor (10), a rotating shaft (11), a fixing frame (12), a brush (13) and a plurality of groups of sealing doors (14), wherein a cavity is arranged in the box body (1), a water outlet and a plurality of groups of material openings are arranged in the cavity, the water outlet and the plurality of groups of material openings are communicated with the cavity, the extension of the first partition plate (2) is connected with the inner side wall of the box body (1) and is arranged in the cavity, the lower part of the cylinder body (3) is fixedly arranged on the inner side wall of the first partition plate (2), an opening is arranged at the bottom end of the cylinder body (3), and is communicated with the interior of the cylinder body (3), the top end of the cylinder (3) is connected with the inner side wall of the box body (1), the supercharging device is arranged at the top end of the box body (1) and communicated with the inside of the cylinder (3), the filter screen (4) is arranged on the outer side wall of the cylinder (3), the inside of the cylinder (3) is communicated with the inside of the cavity through the filter screen (4), the water inlet pipe (5) is arranged on the outer side wall of the box body (1), the output end of the water inlet pipe (5) is communicated with the inside of the cylinder (3), the extension of the second partition plate (6) is connected with the inner side wall of the box body (1) and arranged inside the cavity, the second partition plate (6) is arranged below the first partition plate (2), the bottom ends of a plurality of groups of electric telescopic columns (7) are all connected with the inner side wall of the box body (1), the upper parts of the plurality of groups of electric telescopic columns (7) can slide up and down through the inside of the second partition plate (6), and the top ends of the plurality of groups of electric telescopic columns (7) are all connected with the bottom ends of the sealing plate (8), the top end of the sealing plate (8) is tightly attached to the bottom opening of the barrel body (3), the sealing gasket (9) is arranged at the top end of the sealing plate (8) and embedded into the sealing plate (8), the bottom end of the first motor (10) is connected with the inner side wall of the box body (1), the bottom end of the rotating shaft (11) is connected with the output end of the top end of the first motor (10), the upper part of the rotating shaft (11) can respectively and rotatably penetrate through the second partition plate (6) and the inside of the sealing plate (8), the sealing plate (8) can slide up and down on the outer side wall of the rotating shaft (11), the extension of the fixed frame (12) is connected with the inner side wall of the cylinder body (3), the top end of the rotating shaft (11) is rotatably connected with the bottom end of the fixed frame (12), the brush (13) is fixedly arranged on the outer side wall of the rotating shaft (11), and the extension of the brush (13) is tightly attached to the inner side wall of the filter screen (4), and a plurality of groups of closed doors (14) are respectively communicated with a plurality of groups of discharge openings of the chamber.

2. The concentrated acid recovery device for metal surface treatment according to claim 1, wherein the pressurizing device comprises a support frame (15), a slide rail (16), a piston plate (17), a threaded sleeve (18) and a second motor (19), the bottom end of the support frame (15) is connected with the top end of the box body (1), the slide rail (16) is installed on the inner side wall of the cylinder body (3), the piston plate (17) can be installed on the inner side wall of the slide rail (16) in a vertical sliding manner, and the piston plate (17) can be arranged in the cylinder body (3) in a vertically sliding manner, the bottom end of the threaded sleeve (18) is connected with the top end of the piston plate (17), an opening is arranged at the top end of the threaded sleeve (18), a second motor (19) is arranged at the top end of the support frame (15), a rotatable stud (20) is longitudinally arranged at the output end at the bottom end of the second motor (19), and the bottom of the stud (20) is rotatably extended into the interior of the threaded sleeve (18) through the opening.

3. The concentrated acid recovery device for metal surface treatment according to claim 1, further comprising a water storage tank (21), a water pump (22), a water discharge pipe (23) and an activated carbon layer (24), wherein a cavity is arranged in the water storage tank (21), a discharge port and an exhaust port are arranged in the cavity, the discharge port and the exhaust port are communicated with the cavity, the water pump (22) is arranged on the outer side wall of the box body (1) and communicated with the water discharge port arranged in the cavity, the input end of the water discharge pipe (23) is communicated with the output end of the water pump (22), the output end of the water pump (22) is communicated with the inside of the cavity, and the extension of the activated carbon layer (24) is connected with the inner side wall of the box body (1) and communicated with the exhaust port arranged in the cavity.

4. The concentrated acid recovery apparatus for metal surface treatment according to claim 1, further comprising two sets of sealing rings (25), wherein the two sets of sealing rings (25) are respectively installed at the bottom ends of the second partition plate (6) and the sealing plate (8), and the two sets of sealing rings (25) are respectively sleeved on the outer side wall of the rotating shaft (11).

5. A concentrated acid recovery apparatus for metal surface treatment according to claim 1, further comprising a viewing window (26), wherein the viewing window (26) is installed on an outer side wall of the case (1) and communicates with the chamber.

6. A concentrated acid recovery apparatus for metal surface treatment according to claim 3, further comprising a liquid level sensor (27), wherein the liquid level sensor (27) is installed on the outer side wall of the water storage tank (21) and communicates with the cavity.

7. A concentrated acid recovery apparatus for metal surface treatment according to claim 1, characterized in that the top of the second partition plate (6) is provided with a groove, the size of which matches the sealing plate (8).