Freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes

Abstract

The utility model discloses a freezing crystallization and recovery device for waste sulfuric acid after steel pipe pickling, which relates to the technical field of waste acid treatment after steel pipe pickling and comprises a recovery box, a settling box is rotatably connected to the upper side in the recovery box, a screen basket is arranged in the settling box, first rotating plates are fixed to the front side and the rear side of the settling box, and second rotating plates are fixed to the left side and the right side of the settling box. The left side and the right side of the first rotating plate are rotationally connected with linkage plates, and a triangular cam is arranged at the lower end between the two linkage plates. The double-shaft driving device drives the triangular cams on the two sides to rotate and is matched with the left and right corresponding linkage plates on the upper side to extrude the settling box in the recycling box on the upper side, so that the settling box rotates left and right in the recycling box, and waste sulfuric acid subjected to internal treatment settling is shaken out of the recycling box and then flows into the crystallization tank on the lower side to be quickly separated out and crystallized; and through lasting and stable shaking, a small amount of treated waste sulfuric acid in the settling tank continuously flows into the lower side crystallization tank, so that the continuous crystallization recovery process of the waste sulfuric acid is ensured, and the waste sulfuric acid treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste acid treatment after steel pipe pickling, in particular to a freezing crystallization and recovery device for waste sulfuric acid after steel pipe pickling. Background Art

[0002] Steel pipe pickling is a commonly used surface treatment process, which is mainly used to remove scale, rust and pollutants on the surface of steel pipes to improve the surface quality and corrosion resistance of steel pipes. Freezing and crystallizing waste sulfuric acid is a method for recycling waste sulfuric acid. The recovery step of waste sulfuric acid from steel pipe pickling is generally precipitation treatment, cooling and crystallization recovery after cooling, but the internal precipitation needs to be frequently treated, and the waste sulfuric acid cannot be continuously treated and crystallized and recovered, resulting in low recovery efficiency, and the general recovery device is more complicated, and the equipment investment and operation cost are high. Therefore, the utility model proposes a freezing crystallization and recovery device for waste sulfuric acid after steel pipe pickling to solve the problems mentioned in the above background technology. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes, comprising a recovery box, a sedimentation box rotatably connected to the upper side of the recovery box, a screen basket is arranged inside the sedimentation box, a rotating plate 1 is fixed to the front and rear sides of the sedimentation box, the left and right sides of the rotating plate 1 are rotatably connected to linkage plates, a triangular cam is arranged at the lower end between the two linkage plates, crystallization grooves are arranged on the left and right lower sides of the recovery box, and a precipitation rod that slides left and right is arranged inside the crystallization groove.

[0006] Preferably, sliding rods are fixed on the front, back, left and right sides of the recovery box, the sliding rods pass through the outer end of the corresponding rotating plate one, and springs are sleeved around the sliding rods. The springs act on the sedimentation box connected to the rotating plate one to keep the sedimentation box balanced.

[0007] Preferably, a dual-axis driving device is fixedly installed on the lower side of the center of the recovery box, and the output shafts at both ends of the dual-axis driving device are fixedly connected to the front and rear triangular cams respectively, and the triangular cams abut against the corresponding linkage plates.

[0008] Preferably, the recycling box is fixed with limiting shafts on the front, back, left and right sides, the limiting shafts are located on the lower side of the rotating plate, and the centers of the left and right linkage plates are provided with limiting grooves corresponding to the limiting shafts, and the limiting shafts limit the movement of the linkage plates.

[0009] Preferably, one end of the two precipitation rods is rotatably connected to a connecting rod, and two rotating plates are fixed to the outer ends of the two output shafts of the dual-axis driving device, and the outer ends of the two rotating plates are rotatably connected to the outer ends of the two connecting rods respectively.

[0010] Preferably, support shafts are fixed on the left and right upper sides of the screen basket, and slots corresponding to the support shafts are opened on the left and right upper sides of the sedimentation box.

[0011] Preferably, a refrigeration element is installed on the lower side of the crystallization tank, and the refrigeration element is powered on to cool down the crystallization tank, and cooperates with the movable upper precipitation rod to precipitate and crush the crystallized sulfuric acid crystals.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model drives the triangular cams on both sides to rotate through a double-axis driving device, cooperates with the corresponding linkage plates on the upper side, squeezes the sedimentation box in the upper recovery box, and makes the sedimentation box rotate left and right in the recovery box, shakes the waste sulfuric acid after the internal treatment and precipitation out of the recovery box, and then flows to the lower crystallization tank for rapid precipitation and crystallization, and shakes steadily and persistently, so that the waste sulfuric acid after treatment in the sedimentation box flows continuously and in small quantities into the lower crystallization tank, ensuring the continuous crystallization recovery process of the waste sulfuric acid and improving the waste sulfuric acid treatment efficiency;

[0014] 2. The utility model is provided with a precipitation rod structure in the crystallization tank. When the double-axis driving device drives the upper sedimentation box to shake, the precipitation rod structures on both sides are simultaneously linked to move left and right, and cooperate with the powered cooling element in the tank to accelerate the cooling and precipitation of the treated waste sulfuric acid, and break the crystallized sulfuric acid to facilitate the recovery of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes proposed by the utility model Figure 1 ;

[0016] Figure 2 This is a front cross-sectional structural schematic diagram of a freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes proposed by the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of a freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes proposed by the utility model Figure 2 ;

[0018] Figure 4 The utility model provides a structural schematic diagram of a screen basket in a freezing crystallization and recovery device for waste sulfuric acid after pickling of a steel pipe.

[0019] In the figure: 1. Recovery box; 2. Sedimentation box; 3. Screen basket; 4. Support shaft; 5. Crystallization tank; 6. Rotating plate 1; 7. Linking plate; 8. Linking rod; 9. Separation rod; 10. Triangular cam; 11. Rotating plate 2; 12. Slot; 13. Slide rod; 14. Spring; 15. Limiting shaft. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 A freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes, comprising a recovery box 1, a sedimentation box 2 is rotatably connected to the upper side of the recovery box 1, a screen basket 3 is arranged inside the sedimentation box 2, waste sulfuric acid and reaction chemicals (such as limestone or ammonium sulfate, etc.) are continuously and in small amounts injected into the sedimentation box 2, the chemicals react with the waste sulfuric acid, and solid precipitation is retained in the screen basket 3;

[0022] Furthermore, a rotating plate 6 is fixed to the front and rear sides of the sedimentation box 2, and the left and right sides of the rotating plate 6 are rotatably connected to the linkage plate 7, and a triangular cam 10 is arranged at the lower end between the two linkage plates 7. Slide rods 13 are fixed to the front and rear sides of the recovery box 1, and the slide rods 13 pass through the outer ends of the corresponding rotating plates 6, and the slide rods 13 are sleeved with springs 14 around the sides. The springs 14 act on the sedimentation box 2 connected to the rotating plate 6 to keep the sedimentation box 2 balanced. A dual-axis drive device is fixedly installed on the lower center of the recovery box 1. The dual-axis drive device The output shafts at both ends are fixedly connected to the front and rear triangular cams 10 respectively, and the triangular cams 10 abut against the corresponding linkage plates 7, so that the linkage plates 7 move up and down. The limiting shafts 15 are fixed to the front and rear sides and left and right sides of the recovery box 1. The limiting shafts 15 are located at the lower side of the rotating plate 6, and the centers of the left and right linkage plates 7 are provided with limiting grooves corresponding to the limiting shafts 15. The limiting shafts 15 limit the movement of the linkage plates 7. With the setting of the limiting shafts 15, the rotating plate 6 links the sedimentation box 2 fixed inside to shake left and right, and the sulfuric acid after the reaction is shaken into the recovery box 1;

[0023] Furthermore, crystallization tanks 5 are provided on the left and right lower sides of the recovery box 1, and precipitation rods 9 that slide left and right are provided inside the crystallization tank 5. One end of the two precipitation rods 9 is rotatably connected with the linkage rod 8. The outer ends of the two output shafts of the double-axis driving device are fixed with rotating plates 11. The outer ends of the two rotating plates 11 are respectively rotatably connected with the outer ends of the two linkage rods 8. The outer end linkage plate 7 and the rotating plate 11 link the precipitation rods 9 on both sides to slide back and forth left and right in the corresponding crystallization tank 5. A refrigeration element is installed on the lower side of the crystallization tank 5. The refrigeration element is energized to cool the crystallization tank 5, and the upper precipitation rod 9 cooperates with the movable

[0024] Furthermore, support shafts 4 are fixed on the left and right upper sides of the screen basket 3, and slots 12 corresponding to the support shafts 4 are opened on the left and right upper sides of the sedimentation box 2. The screen basket 3 can be conveniently lifted and transported through the left and right support shafts 4 on the upper side, and the solid precipitate of the reaction can be filtered out through the screen basket 3.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes, comprising a recovery tank (1), characterized in that: The recovery box (1) is rotatably connected to a sedimentation box (2) on its upper side, a screen basket (3) is arranged inside the sedimentation box (2), a rotating plate (6) is fixed to the front and rear sides of the sedimentation box (2), the rotating plate (6) is rotatably connected to linkage plates (7) on both left and right sides, a triangular cam (10) is arranged at the lower end between the two linkage plates (7), the recovery box (1) is provided with crystallization grooves (5) on both left and right lower sides, and a precipitation rod (9) is arranged inside the crystallization groove (5) so as to slide left and right.

2. The freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes according to claim 1, characterized in that: The recovery box (1) is fixed with sliding rods (13) on the front, rear, left and right sides. The sliding rods (13) penetrate the outer end of the corresponding rotating plate (6). A spring (14) is sleeved around the sliding rod (13). The spring acts on the sedimentation box (2) connected to the rotating plate (6) to keep the sedimentation box (2) balanced.

3. The freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipe according to claim 1, characterized in that: A double-shaft drive device is fixedly installed on the lower center side of the recovery box (1), and the output shafts at both ends of the double-shaft drive device are respectively fixedly connected to the front and rear triangular cams (10), and the triangular cams (10) abut against the corresponding linkage plates (7).

4. The freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipes according to claim 1, characterized in that: The recovery box (1) is fixed with a limiting shaft (15) on the front, rear, left and right sides. The limiting shaft (15) is located at the lower side of the rotating plate (6), and the centers of the left and right linkage plates (7) are provided with limiting grooves corresponding to the limiting shaft (15). The limiting shaft (15) limits the movement of the linkage plate (7).

5. The freezing crystallization and recovery device for waste sulfuric acid after pickling of steel pipe according to claim 1, characterized in that: One end of the two precipitation rods (9) is rotatably connected to a connecting rod (8), and the outer ends of the two output shafts of the double-axis driving device are fixed with two rotating plates (11), and the outer ends of the two rotating plates (11) are respectively rotatably connected to the outer ends of the two connecting rods (8).

6. The freezing crystallization and recovery device for waste sulfuric acid after steel pipe pickling according to claim 1 is characterized in that: Support shafts (4) are fixed on the left and right upper sides of the screen basket (3), and clamping grooves (12) corresponding to the support shafts (4) are opened on the left and right upper sides of the sedimentation box (2).

7. The freezing crystallization and recovery device for waste sulfuric acid after steel pipe pickling according to claim 1 is characterized in that: A refrigeration element is installed on the lower side of the crystallization tank (5). The refrigeration element is powered on to cool the crystallization tank (5) and cooperates with the movable upper precipitation rod (9) to precipitate and crush the crystallized sulfuric acid crystals.

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