Environment-friendly and energy-saving mirabilite removal equipment for recycling chromium liquid

Abstract

The invention relates to environment-friendly and energy-saving recycling mirabilite removal equipment in chromium liquid, which comprises an enamel tank, a feeding hole is formed in the upper end of the enamel tank, a material external connecting pipe is arranged in the feeding hole, and a driving mechanism is arranged in the enamel tank; the method is particularly suitable for being used and has a relatively high commercial prospect; according to the chromium liquid recovery device, existing chromium liquid recovery equipment is improved and modified, in the mirabilite removal process, the material external connection pipe can be unblocked, mirabilite crystals are prevented from being deposited at a discharging port of the material external connection pipe, and therefore the situation that the material external connection pipe is blocked is avoided, and the service life of the material external connection pipe is prolonged. Therefore, the equipment does not need to be unblocked and cleaned, so that the production efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the technical field, specifically to an environmentally friendly and energy-saving device for removing sodium sulfate from recycled chromium solutions. Background Technology

[0002] In order to comply with the concept of energy conservation and environmental protection, the sodium sulfate solution needs to be removed during the recycling and reuse process.

[0003] Methods for removing sodium sulfate generally fall into two categories: cold methods and hot methods. Cold methods typically involve concentrating sodium sulfate at low temperatures and repeating the process to separate it. These methods generally utilize the different solubilities of sodium sulfate and other components in the chromium solution within a temperature range of 0-30°C to remove sodium sulfate. Specifically, during the separation process, sodium sulfate adheres to the inner wall of the material outlet. As the reaction continues, this can block the outlet of the material outlet, requiring regular cleaning of the equipment to prevent blockage. However, cleaning necessitates machine shutdown, thus reducing production efficiency. To address these issues, this invention proposes an environmentally friendly and energy-saving sodium sulfate removal device for recycling chromium solution. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide an environmentally friendly and energy-saving device for removing sodium sulfate from recycled chromium solutions, so as to solve the above-mentioned technical problems.

[0006] (2) Technical solution

[0007] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0008] An environmentally friendly and energy-saving device for removing sodium sulfate from chromium molten metal includes an enamel tank. The upper end of the enamel tank has a feed hole, and an external material pipe is installed inside the feed hole. A drive mechanism is installed inside the enamel tank.

[0009] Furthermore, the driving mechanism includes a cleaning section, which includes a connecting ring and an inclined connecting rod. The connecting ring is movably disposed inside the enamel tank. One end of the inclined connecting rod is fixedly connected to the upper surface of the connecting ring, and the other end of the inclined connecting rod is fixedly connected to a vertical cleaning rod. The vertical cleaning rod is disposed directly below the material external pipe, and a cleaning cap is fixedly connected to the upper end of the vertical cleaning rod.

[0010] Furthermore, the driving mechanism includes a driving unit, which includes a driving cylinder and a cylinder arm. One end of the cylinder arm is fixedly connected to the upper end face of the connecting ring, and the other end of the cylinder arm is fixedly connected to the driving end of the driving cylinder. The driving cylinder is fixedly connected to the outer wall of the enamel tank.

[0011] Furthermore, the vertical cleaning rod includes a first cleaning rod, a spiral rod, and a second cleaning rod, which are arranged sequentially from bottom to top. The first cleaning rod and the spiral rod are fixedly connected, and the spiral rod and the second cleaning rod are rotatably connected.

[0012] Furthermore, the enamel tank is equipped with an extension mechanism, which includes a first moving ring and a guide telescopic assembly. The first moving ring is movably sleeved on the outside of the spiral rod, and a spiral groove is formed on the inner ring wall of the first moving ring. The spiral groove is spirally connected to the spiral rod. The lower end of the guide telescopic assembly is fixedly connected to the upper end face of the first moving ring, and one end of a push-pull hinge rod is hinged to the upper end of the guide telescopic assembly. The other end of the push-pull hinge rod is hinged to the side wall of the telescopic claw, and the telescopic claw is hinged to the lower end face of the cleaning cap. One end of a first support spring is fixedly connected to the side wall of the telescopic claw, and the other end of the first support spring is fixedly connected to the second cleaning rod.

[0013] Furthermore, the guide telescopic assembly includes a guide telescopic cylinder, a guide telescopic rod, and a guide telescopic spring. The guide telescopic rod is movably inserted into the guide telescopic cylinder, and the guide telescopic spring is wound around the outside of the guide telescopic rod. The two ends of the guide telescopic spring are respectively fixedly connected to the outer side wall of the guide telescopic cylinder and the side wall of the guide telescopic rod.

[0014] Furthermore, the first moving ring includes a fixed part and a rotating part. The rotating part is rotatably disposed on the upper end surface of the fixed part, and a guide telescopic component is fixedly connected to the upper end surface of the rotating part.

[0015] Furthermore, the cleaning cap includes a support block, a fixing cover, and a return spring. The support block is hinged to the telescopic claw and is movably inserted into the fixing cover. One end of the return spring is fixedly connected to the inner side wall of the fixing cover, and the other end of the return spring is fixedly connected to the upper end surface of the support block.

[0016] Furthermore, a cutting mechanism is provided inside the enamel can.

[0017] Furthermore, the cutting mechanism includes a fixed contact ball and a vertical fixing rod. The fixed contact ball is disposed inside the fixed cover, and a vertical fixing rod is fixedly connected to the lower end face of the fixed contact ball. The lower end of the vertical fixing rod is fixedly connected to the upper end face of the support block. Two arc-shaped cleaning rods are symmetrically arranged below the fixed contact ball, and a rotating support rod is provided on the arc-shaped cleaning rod. The rotating support rod is rotatably disposed inside the fixed cover. The end of the arc-shaped cleaning rod away from the fixed contact ball extends into the support through hole, and the support through hole is opened on the fixed cover. One end of a No. 3 support spring is fixedly connected to the side wall of the arc-shaped cleaning rod, and the other end of the No. 3 support spring is fixedly connected to the inner side wall of the fixed cover.

[0018] (3) Beneficial effects:

[0019] This invention improves existing chromium liquid recovery equipment. The modified chromium liquid recovery equipment can unclog the external material inlet during the removal of sodium sulfate, preventing sodium sulfate crystals from depositing at the material outlet and thus avoiding blockage. This eliminates the need for equipment cleaning and effectively improves production efficiency.

[0020] In this invention, a driving mechanism is installed inside the enamel tank. The driving mechanism can unclog the material external pipe. Specifically, the combination of the cylinder arm and the driving cylinder allows the connecting ring to move up and down in a cyclical motion. The movement of the connecting ring can agitate the liquid in the enamel tank, accelerating the crystallization process. At the same time, the movement of the connecting ring, through the inclined connecting rod and the vertical cleaning rod, causes the cleaning cap to circulate in and out of the material external pipe, thereby achieving the effect of unclogging.

[0021] In this invention, an extension mechanism is installed inside the enamel tank. This extension mechanism can accelerate the unblocking process and improve the unblocking effect. Specifically, as the cylinder arm continues to move upward, the second moving ring is pressed against the inner wall of the enamel tank and moves downward relative to the cylinder arm. During this movement, the horizontal connecting rod and the first moving ring pull the push-pull hinge rod downward, which in turn pulls the telescopic claw towards the vertical cleaning rod. At this time, the telescopic claw can retract, preventing the crystals from moving upward with the vertical cleaning rod. As the enamel tank presses against the second moving ring, the second moving ring will return to its original position under the action of the second support spring. This, along with the first moving ring, the guide telescopic component, the push-pull hinge rod, and the first support spring, resets the telescopic claw. As the vertical cleaning rod moves downward, the extension of the telescopic claw allows for a larger area of ​​crystal cleaning inside the material outer pipe, thereby improving the cleaning efficiency.

[0022] In this invention, the vertical cleaning rod includes a first cleaning rod, a spiral rod, and a second cleaning rod; the first moving ring includes a fixed part and a rotating part; and a spiral groove is provided on the inner ring wall of the first moving ring, specifically the spiral groove is located on the rotating part. With this configuration, when the first moving ring moves up and down relative to the vertical cleaning rod, the mutual meshing of the spiral groove and the spiral rod causes the cleaning cap with the telescopic claw to rotate. By providing rotational force, it cuts the crystals, thereby preventing the equipment from getting stuck and improving the production efficiency of the equipment.

[0023] In this invention, a cutting mechanism is installed inside the enamel tank, and the cleaning cap includes a support block, a fixed cover, and a return spring. Through the above structure, a cutting force can be applied during the upward movement of the cleaning cap to cut off the adhered crystals and prevent the equipment from getting stuck. Specifically, during the downward movement of the second moving ring relative to the cylinder arm, the support block is pulled downward relative to the fixed cover by the first moving ring, the guide telescopic component, the push-pull hinge, and the telescopic claw. During this movement, the arc-shaped cleaning rod rotates by contacting the fixed contact ball, causing the free end of the arc-shaped cleaning rod to extend outside the fixed cover. Thus, when the cleaning cap rotates upward, it achieves the cutting effect on the crystals. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the environmentally friendly and energy-saving chromium solution recycling equipment for removing sodium sulfate in Embodiment 1 of the present invention;

[0025] Figure 2 This invention relates to an environmentally friendly and energy-saving device for removing sodium sulfate from recycled chromium solutions. Figure 1 Enlarged schematic diagram of structure A in the middle;

[0026] Figure 3 This invention relates to an environmentally friendly and energy-saving device for removing sodium sulfate from recycled chromium solutions. Figure 2 A magnified schematic diagram of the central part of the structure;

[0027] Figure 4 This invention relates to an environmentally friendly and energy-saving device for removing sodium sulfate from recycled chromium solutions. Figure 3 A magnified schematic diagram of the central part of the structure;

[0028] Figure 5 This is a schematic diagram of the internal structure of the enamel can in Embodiment 2 of the present invention.

[0029] The attached figures are labeled as follows:

[0030] Enameled tank 1, drive mechanism 2, connecting ring 21, cylinder arm 22, drive cylinder 23, inclined connecting rod 24, vertical cleaning rod 25, first cleaning rod 251, spiral rod 252, second cleaning rod 253, cleaning cap 26, support block 261, fixing cover 262, return spring 263, extension mechanism 3, first moving ring 31, fixing part 311, rotating part 312, guide telescopic assembly 32, guide telescopic cylinder 321, guide telescopic rod 322, guide telescopic spring 323, push-pull hinge rod 33, telescopic claw 34, first support spring 35, horizontal connecting rod 36, second moving ring 37, second support spring 38, cutting mechanism 4, fixed contact ball 41, vertical fixing rod 42, arc-shaped cleaning rod 43, support through hole 44, rotating support rod 45, third support spring 46. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 The present invention is further illustrated by the embodiments:

[0032] Example 1:

[0033] An environmentally friendly and energy-saving device for removing sodium sulfate from chromium liquor includes an enamel tank 1. The upper end of the enamel tank 1 has a feed hole, and an external material inlet pipe is installed inside the feed hole. A drive mechanism 2 is installed inside the enamel tank 1. This invention improves upon existing chromium liquor recovery equipment. The modified chromium liquor recovery equipment, during the removal of sodium sulfate, can effectively unclog the external material inlet pipe, preventing sodium sulfate crystals from depositing at the outlet of the external material inlet pipe. This avoids blockage of the external material inlet pipe, eliminating the need for equipment cleaning and thus effectively improving production efficiency.

[0034] In this embodiment, the drive mechanism 2 includes a cleaning section, which includes a connecting ring 21 and an inclined connecting rod 24. The connecting ring 21 is movably disposed inside the enamel tank 1. One end of the inclined connecting rod 24 is fixedly connected to the upper end surface of the connecting ring 21, and the other end of the inclined connecting rod 24 is fixedly connected to the vertical cleaning rod 25. The vertical cleaning rod 25 is disposed directly below the material external pipe, and a cleaning cap 26 is fixedly connected to the upper end of the vertical cleaning rod 25.

[0035] In this embodiment, the drive mechanism 2 includes a drive unit, which includes a drive cylinder 23 and a cylinder arm 22. One end of the cylinder arm 22 is fixedly connected to the upper end face of the connecting ring 21, and the other end of the cylinder arm 22 is fixedly connected to the drive end of the drive cylinder 23. The drive cylinder 23 is fixedly connected to the outer wall of the enamel tank 1.

[0036] In this invention, a drive mechanism 2 is provided inside the enamel tank 1. The drive mechanism 2 can unclog the material external pipe. Specifically, the combination structure of the cylinder arm 22 and the drive cylinder 23 allows the connecting ring 21 to move up and down in a cyclical motion. The movement of the connecting ring 21 can agitate the liquid in the enamel tank 1, accelerating the crystallization process. At the same time, the movement of the connecting ring 21 will cause the cleaning cap 26 to move in and out of the material external pipe through the inclined connecting rod 24 and the vertical cleaning rod 25, thereby achieving the effect of unblocking.

[0037] In this embodiment, the vertical cleaning rod 25 includes a first cleaning rod 251, a spiral rod 252, and a second cleaning rod 253, arranged sequentially from bottom to top. The first cleaning rod 251 and the spiral rod 252 are fixedly connected, while the spiral rod 252 and the second cleaning rod 253 are rotatably connected. The first moving ring 31 includes a fixed part 311 and a rotating part 312. A spiral groove is provided on the inner ring wall of the first moving ring 31, specifically on the rotating part 312. This arrangement allows the first moving ring 31 to move up and down relative to the vertical cleaning rod 25 through the meshing of the spiral groove and the spiral rod 252, causing the cleaning cap 26 to rotate with the telescopic claw 34. By providing rotational force, the crystals are cut, thus preventing the equipment from jamming and improving the equipment's production efficiency.

[0038] In this embodiment, an extension mechanism 3 is provided inside the enamel tank 1. The extension mechanism 3 includes a first moving ring 31 and a guide telescopic assembly 32. The first moving ring 31 is movably sleeved outside the spiral rod 252, and a spiral groove is provided on the inner ring wall of the first moving ring 31. The spiral groove is spirally connected to the spiral rod 252. The lower end of the guide telescopic assembly 32 is fixedly connected to the upper end surface of the first moving ring 31, and one end of the push-pull hinge rod 33 is hinged to the upper end of the guide telescopic assembly 32. The other end of the push-pull hinge rod 33 is hinged to the side wall of the telescopic claw 34, and the telescopic claw 34 is hinged to the lower end surface of the cleaning cap 26. One end of the first support spring 35 is fixedly connected to the side wall of the telescopic claw 34, and the other end of the first support spring 35 is fixedly connected to the second cleaning rod 253.

[0039] In this invention, an extension mechanism 3 is provided inside the enamel tank 1. The extension mechanism 3 can accelerate the unblocking speed and improve the unblocking effect. Specifically, as the cylinder arm 22 continues to move upward, the second moving ring 37 will be pressed against the inner wall of the enamel tank 1 and move downward relative to the cylinder arm 22. During this movement, the horizontal connecting rod 36 and the first moving ring 31 pull the push-pull hinge rod 33 downward, thereby pulling the telescopic claw 34 towards the vertical cleaning rod 25 through the push-pull hinge rod 33. At this time, the telescopic claw 34 can be retracted, avoiding When the vertical cleaning rod 25 moves upward, it carries the crystals upward. As the enamel tank 1 comes into contact with the second moving ring 37, the second moving ring 37 will be reset under the action of the second support spring 38. This resets the telescopic claw 34 through the first moving ring 31, the guide telescopic assembly 32, the push-pull hinge rod 33, and the first support spring 35. As the vertical cleaning rod 25 moves downward, the telescopic claw 34 unfolds, allowing for a larger area of ​​crystal cleaning inside the material outer pipe, thus improving cleaning efficiency.

[0040] In this embodiment, the guide telescopic assembly 32 includes a guide telescopic cylinder 321, a guide telescopic rod 322, and a guide telescopic spring 323. The guide telescopic rod 322 is movably inserted into the guide telescopic cylinder 321, and the guide telescopic spring 323 is wound around the outside of the guide telescopic rod 322. The two ends of the guide telescopic spring 323 are respectively fixedly connected to the outer side wall of the guide telescopic cylinder 321 and the side wall of the guide telescopic rod 322.

[0041] In this embodiment, the first moving ring 31 includes a fixed part 311 and a rotating part 312. The rotating part 312 is rotatably disposed on the upper end surface of the fixed part 311, and a guide telescopic component 32 is fixedly connected to the upper end surface of the rotating part 312.

[0042] In this embodiment, the cleaning cap 26 includes a support block 261, a fixing cover 262, and a return spring 263. The support block 261 is hinged to the telescopic claw 34, and the support block 261 is movably inserted into the fixing cover 262. One end of the return spring 263 is fixedly connected to the inner side wall of the fixing cover 262, and the other end of the return spring 263 is fixedly connected to the upper end surface of the support block 261.

[0043] In this embodiment, a cutting mechanism 4 is provided inside the enamel can 1. The cutting mechanism 4 includes a fixed contact ball 41 and a vertical fixing rod 42. The fixed contact ball 41 is disposed inside the fixed cover 262, and the vertical fixing rod 42 is fixedly connected to the lower end surface of the fixed contact ball 41. The lower end of the vertical fixing rod 42 is fixedly connected to the upper end surface of the support block 261. Two arc-shaped cleaning rods 43 are symmetrically arranged below the fixed contact ball 41, and a rotating support rod 45 is provided on the arc-shaped cleaning rod 43. The rotating support rod 45 is rotatably disposed inside the fixed cover 262. One end of the arc-shaped cleaning rod 43 away from the fixed contact ball 41 extends into the support through hole 44, and the support through hole 44 is opened on the fixed cover 262. One end of a No. 3 support spring 46 is fixedly connected to the side wall of the arc-shaped cleaning rod 43, and the other end of the No. 3 support spring 46 is fixedly connected to the inner side wall of the fixed cover 262.

[0044] In this invention, a cutting mechanism 4 is provided inside the enamel tank 1, and the cleaning cap 26 includes a support block 261, a fixing cover 262, and a return spring 263. Through the above structure, the cleaning cap 26 can exert a cutting force during its upward movement, which can cut off the adhered crystals and prevent the equipment from getting stuck. Specifically, during the downward movement of the second moving ring 37 relative to the cylinder arm 22, the support block 261 is pulled downward partially relative to the fixing cover 262 by the first moving ring 31, the guide telescopic component 32, the push-pull hinge rod 33, and the telescopic claw 34. During this movement, the arc-shaped cleaning rod 43 is rotated by the fixed contact ball 41, so that the free end of the arc-shaped cleaning rod 43 extends outside the fixing cover 262. Thus, when the cleaning cap 26 rotates upward, it can achieve the cutting effect on the crystals.

[0045] Beneficial effects of this invention:

[0046] This invention improves existing chromium liquid recovery equipment. The modified chromium liquid recovery equipment can unclog the external material inlet during the removal of sodium sulfate, preventing sodium sulfate crystals from depositing at the material outlet and thus avoiding blockage. This eliminates the need for equipment cleaning and effectively improves production efficiency.

[0047] In this invention, a drive mechanism 2 is provided inside the enamel tank 1. The drive mechanism 2 can unclog the material external pipe. Specifically, the combination structure of the cylinder arm 22 and the drive cylinder 23 allows the connecting ring 21 to move up and down in a cyclical motion. The movement of the connecting ring 21 can agitate the liquid in the enamel tank 1, accelerating the crystallization process. At the same time, the movement of the connecting ring 21 will cause the cleaning cap 26 to move in and out of the material external pipe through the inclined connecting rod 24 and the vertical cleaning rod 25, thereby achieving the effect of unblocking.

[0048] In this invention, an extension mechanism 3 is provided inside the enamel tank 1. The extension mechanism 3 can accelerate the unblocking speed and improve the unblocking effect. Specifically, as the cylinder arm 22 continues to move upward, the second moving ring 37 will be pressed against the inner wall of the enamel tank 1 and move downward relative to the cylinder arm 22. During this movement, the horizontal connecting rod 36 and the first moving ring 31 pull the push-pull hinge rod 33 downward, thereby pulling the telescopic claw 34 towards the vertical cleaning rod 25 through the push-pull hinge rod 33. At this time, the telescopic claw 34 can be retracted, avoiding When the vertical cleaning rod 25 moves upward, it carries the crystals upward. As the enamel tank 1 comes into contact with the second moving ring 37, the second moving ring 37 will be reset under the action of the second support spring 38. This resets the telescopic claw 34 through the first moving ring 31, the guide telescopic assembly 32, the push-pull hinge rod 33, and the first support spring 35. As the vertical cleaning rod 25 moves downward, the telescopic claw 34 unfolds, allowing for a larger area of ​​crystal cleaning inside the material outer pipe, thus improving cleaning efficiency.

[0049] In this invention, the vertical cleaning rod 25 includes a first cleaning rod 251, a spiral rod 252, and a second cleaning rod 253; the first moving ring 31 includes a fixed part 311 and a rotating part 312; and a spiral groove is provided on the inner ring wall of the first moving ring 31, specifically the spiral groove is provided on the rotating part 312. With this configuration, when the first moving ring 31 moves up and down relative to the vertical cleaning rod 25, the mutual meshing of the spiral groove and the spiral rod 252 causes the cleaning cap 26 to rotate with the telescopic claw 34. By providing rotational force, it cuts the crystals, thereby preventing the equipment from getting stuck and improving the production efficiency of the equipment.

[0050] In this invention, a cutting mechanism 4 is provided inside the enamel tank 1, and the cleaning cap 26 includes a support block 261, a fixing cover 262, and a return spring 263. Through the above structure, the cleaning cap 26 can exert a cutting force during its upward movement, which can cut off the adhered crystals and prevent the equipment from getting stuck. Specifically, during the downward movement of the second moving ring 37 relative to the cylinder arm 22, the support block 261 is pulled downward partially relative to the fixing cover 262 by the first moving ring 31, the guide telescopic component 32, the push-pull hinge rod 33, and the telescopic claw 34. During this movement, the arc-shaped cleaning rod 43 is rotated by the fixed contact ball 41, so that the free end of the arc-shaped cleaning rod 43 extends outside the fixing cover 262. Thus, when the cleaning cap 26 rotates upward, it can achieve the cutting effect on the crystals.

[0051] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An environmentally friendly and energy-saving device for removing sodium sulfate from recycled chromium solution, comprising an enamel tank (1), wherein the upper end of the enamel tank (1) is provided with a feed hole, and an external material inlet pipe is provided inside the feed hole, characterized in that, The enamel can (1) is equipped with a drive mechanism (2).

2. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 1, characterized in that: The drive mechanism (2) includes a cleaning section, which includes a connecting ring (21) and an inclined connecting rod (24). The connecting ring (21) is movably disposed inside the enamel tank (1). One end of the inclined connecting rod (24) is fixedly connected to the upper surface of the connecting ring (21), and the other end of the inclined connecting rod (24) is fixedly connected to the vertical cleaning rod (25). The vertical cleaning rod (25) is disposed directly below the material external pipe, and a cleaning cap (26) is fixedly connected to the upper end of the vertical cleaning rod (25).

3. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 2, characterized in that: The drive mechanism (2) includes a drive unit, which includes a drive cylinder (23) and a cylinder arm (22). One end of the cylinder arm (22) is fixedly connected to the upper end face of the connecting ring (21), and the other end of the cylinder arm (22) is fixedly connected to the drive end of the drive cylinder (23). The drive cylinder (23) is fixedly connected to the outer wall of the enamel tank (1).

4. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 3, characterized in that: The vertical cleaning rod (25) includes a first cleaning rod (251), a spiral rod (252), and a second cleaning rod (253). The first cleaning rod (251), the spiral rod (252), and the second cleaning rod (253) are arranged sequentially from bottom to top. The first cleaning rod (251) and the spiral rod (252) are fixedly connected, and the spiral rod (252) and the second cleaning rod (253) are rotatably connected.

5. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 4, characterized in that: The enamel can (1) is provided with an extension mechanism (3). The extension mechanism (3) includes a first moving ring (31) and a guide telescopic assembly (32). The first moving ring (31) is movably sleeved on the outside of the spiral rod (252), and a spiral groove is provided on the inner ring wall of the first moving ring (31). The spiral groove is spirally connected to the spiral rod (252). The lower end of the guide telescopic assembly (32) is fixedly connected to the upper end surface of the first moving ring (31), and one end of the push-pull hinge rod (33) is hinged to the upper end of the guide telescopic assembly (32). The other end of the push-pull hinge rod (33) is hinged to the side wall of the telescopic claw (34), and the telescopic claw (34) is hinged to the lower end surface of the cleaning cap (26). One end of the first support spring (35) is fixedly connected to the side wall of the telescopic claw (34), and the other end of the first support spring (35) is fixedly connected to the second cleaning rod (253).

6. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 5, characterized in that: The guide telescopic assembly (32) includes a guide telescopic cylinder (321), a guide telescopic rod (322), and a guide telescopic spring (323). The guide telescopic rod (322) is movably inserted into the guide telescopic cylinder (321), and the guide telescopic spring (323) is wound around the outside of the guide telescopic rod (322). The two ends of the guide telescopic spring (323) are respectively fixedly connected to the outer side wall of the guide telescopic cylinder (321) and the side wall of the guide telescopic rod (322).

7. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 5, characterized in that: The first moving ring (31) includes a fixed part (311) and a rotating part (312). The rotating part (312) is rotatably disposed on the upper end surface of the fixed part (311), and a guide telescopic component (32) is fixedly connected to the upper end surface of the rotating part (312).

8. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 5, characterized in that: The cleaning cap (26) includes a support block (261), a fixing cover (262), and a return spring (263). The support block (261) is hinged to the telescopic claw (34), and the support block (261) is movably inserted into the fixing cover (262). One end of the return spring (263) is fixedly connected to the inner wall of the fixing cover (262), and the other end of the return spring (263) is fixedly connected to the upper surface of the support block (261).

9. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 8, characterized in that: The enamel can (1) is equipped with a cutting mechanism (4).

10. The environmentally friendly and energy-saving equipment for removing sodium sulfate from recycled chromium solution as described in claim 9, characterized in that: The cutting mechanism (4) includes a fixed contact ball (41) and a vertical fixing rod (42). The fixed contact ball (41) is disposed inside the fixing cover (262), and the vertical fixing rod (42) is fixedly connected to the lower end face of the fixed contact ball (41). The lower end of the vertical fixing rod (42) is fixedly connected to the upper end face of the support block (261). Two arc-shaped cleaning rods (43) are symmetrically arranged below the fixed contact ball (41), and the arc-shaped cleaning rods (43) are provided with... A rotating support rod (45) is rotatably mounted inside a fixed cover (262). The end of the arc-shaped cleaning rod (43) away from the fixed contact ball (41) extends into a support through hole (44), which is located on the fixed cover (262). One end of a No. 3 support spring (46) is fixedly connected to the side wall of the arc-shaped cleaning rod (43), and the other end of the No. 3 support spring (46) is fixedly connected to the inner side wall of the fixed cover (262).

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