Mixed reaction kettle for hot galvanizing waste acid treatment

Abstract

The invention discloses a mixed reaction kettle for hot galvanizing waste acid treatment, and relates to the technical field of reaction kettles. Comprising a reaction kettle, a stirring rod and a slag discharge port, an electric push rod is mounted at the bottom end of the stirring rod, a compensation rod is connected to the end of the electric push rod, a pressure sensor for controlling the compensation rod is mounted at the bottom of the inner wall of the reaction kettle, a squeezing head is fixed to the bottom end of the compensation rod, a filter screen is arranged at the tail end of a cavity in the squeezing head, and a one-way valve is mounted in the cavity; a residue discharging opening is formed in the inner wall of the reaction kettle, a sealing blade and a residue discharging blade are installed on the inner wall of the residue discharging opening, the sealing blade and the residue discharging blade are connected with a sealing assembly and a residue discharging assembly respectively, and a residue scraping assembly is installed on the inner wall of the reaction kettle. The complex process of transferring the precipitate to the filter press for secondary dehydration in the traditional process is avoided, so that the pressed precipitate can be directly discharged by the reaction kettle, the working process is shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of reaction kettles, and particularly to a mixing reaction kettle for treating waste acid from hot-dip galvanizing. Background Art

[0002] A reaction kettle is a closed container used for physical or chemical reactions, and is widely used in fields such as chemical industry, pharmaceuticals, metallurgy, and environmental protection. Its main structure consists of a reaction kettle body, a stirring device, a heating / cooling system, a sealing device, and a control system. The materials are mostly stainless steel, titanium alloy, or glass-lined enamel, and can withstand high temperatures, high pressures, and strongly corrosive media. By precisely controlling the temperature, pressure, and stirring speed, the reaction kettle can efficiently complete processes such as synthesis, polymerization, neutralization, and crystallization. According to requirements, functions such as multi-stage stirring, on-line monitoring, and automatic feeding can also be configured to ensure the safety and stability of the reaction process. It is an indispensable core equipment in modern industry.

[0003] In the hot-dip galvanizing industry, the application of a mixing reaction kettle is particularly crucial. The waste acid generated during the hot-dip galvanizing process contains high concentrations of zinc ions, iron ions, and free acid. The process requires steps such as neutralization precipitation and redox in the mixing reaction kettle to achieve heavy metal recovery and acid liquor regeneration. After the reaction is completed in the existing reaction kettle, the precipitate is collected through the bottom slag discharge valve. However, due to the absence of a dehydration device, the water content in the discharged precipitate is relatively high, and it needs to be additionally transported to a filter press or drying equipment for secondary dehydration, which increases the workload and working cost and reduces the overall process efficiency.

[0004] In view of the above problems, there is an urgent need for innovative design on the original basis. Summary of the Invention

[0005] The purpose of the present invention is to provide a mixing reaction kettle for treating waste acid from hot-dip galvanizing, so as to solve the problem proposed in the above background art that the precipitate needs to be transported to a filter press for secondary dehydration. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A mixing reaction kettle for treating waste acid from hot-dip galvanizing, including a reaction kettle, a stirring rod, and a slag discharge port. An electric push rod is installed at the bottom end of the stirring rod, and the extending end of the electric push rod is connected to a compensation rod. A pressure sensor for controlling the compensation rod is installed at the bottom of the inner wall of the reaction kettle. A pressing head is fixed at the bottom end of the compensation rod. A filter screen is arranged at the end of the inner cavity of the pressing head, and a one-way valve is installed in the cavity. A sealing blade is installed in the upper region of the inner wall of the slag discharge port through a sealing component, and a slag discharge component is installed in the lower region of the inner wall of the slag discharge port through a slag discharge component. A slag scraping component is installed on the inner wall of the reaction kettle; The sealing assembly includes a sealing driven gear mounted on the outer wall of the sealing blade, and a sealing driving ring rotatably mounted on the inner wall of the slag discharge port. The inner wall of the sealing driving ring is provided with teeth meshing with the sealing driven gear. It also includes a sealing driving shaft rotatably mounted on the inner wall of the slag discharge port. A sealing driving gear meshing with the teeth on the outer wall of the sealing driving ring is mounted at the bottom end of the sealing driving shaft. First and second racks are oppositely meshed and mounted on both sides of the sealing driving shaft.

[0007] Preferably, a sealing rubber pad is mounted on the side wall of the squeezing head, and the diameter of the squeezing head is equal to the diameter of the slag discharge port.

[0008] Preferably, the slag discharge assembly includes a slag discharge driven gear mounted on the outer wall of the slag discharge blade, and a slag discharge rotating ring rotatably mounted on the inner wall of the slag discharge port. The inner wall of the slag discharge rotating ring is provided with teeth meshing with the slag discharge driven gear. It also includes a slag discharge driving shaft rotatably mounted on the inner wall of the slag discharge port. A slag discharge driving gear meshing with the teeth on the outer wall of the slag discharge rotating ring is mounted at the bottom end of the slag discharge driving shaft. Third and fourth racks are oppositely meshed and mounted on both sides of the slag discharge driving shaft.

[0009] Preferably, four sealing blades and slag discharge blades are respectively mounted on the inner wall of the slag discharge port. The sealing blades are located above the slag discharge blades. After the four sealing blades and the slag discharge blades rotate and close, they are in a tightly attached and sealed state.

[0010] Preferably, the first rack, the third rack, the second rack and the fourth rack are vertically arranged in sequence, and the racks are all located above the sealing blade.

[0011] Preferably, the distance between the first rack and the second rack, and between the third rack and the fourth rack is greater than the thickness of the squeezing head.

[0012] Preferably, the end parts of the first rack and the second rack, and the third rack and the fourth rack close to the sealing blade are respectively designed to be oppositely inclined.

[0013] Preferably, the slag scraping assembly includes a transmission gear rotatably mounted at the top end of the slag discharge driving shaft. A rotating piece is rotatably mounted on the inner wall of the bottom cavity of the transmission gear. A ratchet corresponding to the rotating piece is mounted on the outer wall of the top end of the slag discharge driving shaft. It also includes a rotating bracket rotatably mounted on the inner wall of the bottom of the reaction kettle. A scraping plate is fixed on the outer wall of the rotating bracket.

[0014] Preferably, the outer wall of the rotating bracket is provided with teeth meshing with the transmission gear. Multiple groups of scraping plates are fixed on the outer wall of the rotating bracket, and the outer wall of the scraping plate is in close contact with the inner wall of the bottom of the reaction kettle.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, through the electric push rod, pressing head, sealing assembly and slag discharging assembly provided, the cumbersome process of transferring the sediment to a filter press for secondary dehydration in the traditional process is avoided. The reaction kettle can directly discharge the sediment after pressing. The electric push rod is used to drive the pressing head into the slag discharging port. During the movement of the pressing head, it cooperates with the third rack and the first rack to open the sealing blade and close the slag discharging blade. The pressing head, through its cooperation with the slag discharging blade, squeezes the sediment on the inner wall of the slag discharging port. The water in the sediment will re-enter the interior of the reaction kettle through the one-way valve to complete the pressing work. During the process of the pressing head retracting and resetting, it cooperates with the fourth rack and the second rack to open the slag discharging blade and close the sealing blade. The pressed sediment will be discharged from the reaction kettle through the gap after the slag discharging blade is opened, shortening the working process and improving the working efficiency.

[0016] 2. In the present invention, through the compensation rod, pressure sensor and slag scraping assembly provided, the efficiency of pressing the sediment is further improved. By real-time monitoring the remaining amount of sediment, the compensation rod can compensate for the extension length of the electric push rod and work together with the electric push rod to provide an additional stroke for the pressing head, ensuring that when the amount of sediment gradually decreases, the pressing head can fully squeeze the sediment and squeeze out as much water as possible from it, improving the sediment treatment effect and dehydration rate. And as the pressing head reciprocates, the slag discharging blade will perform continuous reciprocating closing actions. The slag discharging driving shaft and the transmission gear cooperate closely in this process to drive the rotating bracket to rotate. The rotating bracket will drive the scraping plate to sort out the sediment inside the reaction kettle, guiding the more dispersed and disorderly sediment into the slag discharging port, which is beneficial to the subsequent pressing work, avoiding sediment accumulation and improving the pressing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a partial sectional structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the slag scraping assembly of the present invention; Figure 4 For the present invention Figure 3 is an enlarged structural schematic diagram at position A in; Figure 5 For the present invention Figure 3 is an enlarged bottom sectional structural schematic diagram at position A in; Figure 6 is a sectional structural schematic diagram of the electric push rod, compensation rod and pressing head of the present invention; Figure 7 is a structural schematic diagram of the sealing assembly and slag discharging assembly of the present invention; Figure 8 is a front view structural schematic diagram of the sealing assembly and slag discharging assembly of the present invention.

[0018] In the figure: 1. Reaction kettle; 11. Stirring rod; 12. Slag discharge port; 2. Electric push rod; 201. Compensation rod; 202. Pressure sensor; 3. Pressing head; 301. Filter screen; 302. Check valve; 4. Sealing drive ring; 401. Sealing driven gear; 402. Sealing blade; 403. Sealing driving shaft; 404. Sealing driving gear; 405. First rack; 406. Second rack; 5. Slag discharge rotating ring; 501. Slag discharge driven gear; 502. Slag discharge blade; 503. Slag discharge driving shaft; 504. Slag discharge driving gear; 505. Third rack; 506. Fourth rack; 6. Transmission gear; 601. Rotating piece; 602. Ratchet; 7. Rotating bracket; 701. Scraping plate. Specific implementation mode

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 - 8 , the present invention provides a technical solution: a mixing reaction kettle for treating hot-dip galvanized waste acid, including a reaction kettle 1, a stirring rod 11 and a slag discharge port 12. An electric push rod 2 is installed at the bottom end of the stirring rod 11. The extending end of the electric push rod 2 is connected with a compensation rod 201. A pressure sensor 202 for controlling the compensation rod 201 is installed at the bottom of the inner wall of the reaction kettle 1. The bottom end of the compensation rod 201 is fixed with a pressing head 3. A filter screen 301 is arranged at the end of the inner cavity of the pressing head 3, and a check valve 302 is installed in the cavity. A sealing blade 402 is installed in the upper area of the inner wall of the slag discharge port 12 through a sealing assembly, and a slag discharge assembly is installed in the lower area of the inner wall of the slag discharge port 12 through a slag discharge assembly. A slag scraping assembly is installed on the inner wall of the reaction kettle 1. The electric push rod 2 is installed at the bottom end of the stirring rod 11, so that the pressing head 3 can flexibly adjust its position. The pressure sensor 202 is installed at the bottom of the inner wall of the reaction kettle 1, which can monitor the remaining amount of sediment in real time, adjust the extending length of the compensation rod 201, and cooperate with the electric push rod 2 to provide an additional stroke for the pressing head 3, ensuring that the pressing head 3 can fully squeeze the sediment under different sediment amounts, squeeze out as much water as possible from it, improve the treatment effect and dehydration rate of the sediment. The filter screen 301 can intercept impurities in the sediment and prevent them from entering the inner wall of the reaction kettle 1. The check valve 302 ensures that the squeezed water can only flow back into the reaction kettle 1 unidirectionally, without affecting the pressing quality of the pressed sediment; The sealing assembly includes a sealing driven gear 401 installed on the outer side wall of the sealing blade 402, and a sealing driving ring 4 rotatably installed on the inner wall of the slag discharge port 12. The inner wall of the sealing driving ring 4 is provided with teeth that mesh with the sealing driven gear 401. It also includes a sealing driving shaft 403 rotatably installed on the inner wall of the slag discharge port 12. A sealing driving gear 404 that meshes with the teeth on the outer side wall of the sealing driving ring 4 is installed at the bottom end of the sealing driving shaft 403. First and second racks 405 and 406 are installed on both sides of the sealing driving shaft 403 in an oppositely meshing manner. Through gear transmission, the sealing blade 402 can be closely attached to form a reliable sealing state, preventing the liquid and sediment in the reaction kettle 1 from leaking, maintaining the pressure stability in the reaction kettle 1, ensuring the normal progress of the reaction. At the same time, during the movement of the pressing head 3, the opening and closing of the sealing blade 402 can be easily achieved through cooperation with the first and second racks 405 and 406, meeting the requirements of different working stages.

[0021] As an implementation manner of the present invention, a sealing rubber pad is installed on the side wall of the pressing head 3, and the diameter of the pressing head 3 is equal to the diameter of the slag discharge port 12. The sealing rubber pad has good elasticity and flexibility. When the pressing head 3 enters the slag discharge port 12, the rubber pad can closely fit the inner wall of the slag discharge port 12 to form a sealed environment, effectively preventing sediment and moisture from leaking out from the gap between the pressing head 3 and the slag discharge port 12 during the pressing process, thereby affecting the pressing effect, enabling the sediment to be more fully squeezed, and improving the dehydration efficiency.

[0022] As an implementation manner of the present invention, the slag discharge assembly includes a slag discharge driven gear 501 installed on the outer side wall of the slag discharge blade 502, and a slag discharge rotating ring 5 rotatably installed on the inner wall of the slag discharge port 12. The inner wall of the slag discharge rotating ring 5 is provided with teeth that mesh with the slag discharge driven gear 501. It also includes a slag discharge driving shaft 503 rotatably installed on the inner wall of the slag discharge port 12. A slag discharge driving gear 504 that meshes with the teeth on the outer side wall of the slag discharge rotating ring 5 is installed at the bottom end of the slag discharge driving shaft 503. Third and fourth racks 505 and 506 are installed on both sides of the slag discharge driving shaft 503 in an oppositely meshing manner. The gear meshing transmission method has the characteristic of high stability. By controlling the rotation of the slag discharge rotating ring 5, the opening and closing states of the slag discharge blade 502 can be accurately controlled, avoiding the abnormal opening and closing of the slag discharge blade 502 caused by unstable transmission, and improving the service life of the slag discharge assembly and the overall reliability of the equipment.

[0023] As an implementation manner of the present invention, four sealing blades 402 and slag discharging blades 502 are respectively installed on the inner wall of the slag discharging port 12, and the sealing blades 402 are located above the slag discharging blades 502. After the four sealing blades 402 and the slag discharging blades 502 are rotationally closed, they are in a tightly attached closed state, which can effectively prevent the precipitates and liquid in the reaction kettle 1 from leaking out of the slag discharging port 12. The good sealing design avoids leakage problems and material losses, which is beneficial to the smooth progress of the work. The four sealing blades 402 and the slag discharging blades 502 are tightly attached to each other, making the force between the blades more uniform and extending the service life of the blades.

[0024] As an implementation manner of the present invention, the first rack 405, the third rack 505, the second rack 406 and the fourth rack 506 are vertically arranged in sequence, and the racks are all located above the sealing blade 402. The vertical arrangement allows each rack to have a clear and orderly structural layout, making the power transmission more direct, enabling the efficient switching between the slag discharging and sealing functions, and improving the reliability and service life of the equipment.

[0025] As an implementation manner of the present invention, the distances between the first rack 405 and the second rack 406, and between the third rack 505 and the fourth rack 506 are greater than the thickness of the pressing head 3, providing enough movement space for the pressing head 3 so that it can move reciprocally smoothly without being restricted by the racks, ensuring the continuity of the entire slag discharging and pressing processes.

[0026] As an implementation manner of the present invention, the end parts of the first rack 405 and the second rack 406, and the third rack 505 and the fourth rack 506 close to the sealing blade 402 are respectively designed to be inclined in opposite directions. The inclined design makes the contact process with the pressing head 3 smoother, avoiding sudden rigid collisions, providing stable power for the structure, and reducing the risk of component damage.

[0027] As an implementation manner of the present invention, the slag scraping assembly includes a transmission gear 6 rotatably installed at the top end of the slag discharging driving shaft 503. A rotating piece 601 is rotatably installed on the inner wall of the bottom cavity of the transmission gear 6. A ratchet wheel 602 corresponding to the rotating piece 601 is installed on the outer wall of the top end of the slag discharging driving shaft 503. It also includes a rotating bracket 7 rotatably installed on the inner wall of the bottom of the reaction kettle 1. A scraping plate 701 is fixed on the outer wall of the rotating bracket 7. The cooperation between the rotating piece 601 and the ratchet wheel 602 enables the rotation of the slag discharging driving shaft 503 to be transmitted to the transmission gear 6 in a specific manner. When the slag discharging driving shaft 503 rotates in one direction, the rotating piece 601 cooperates with the ratchet wheel 602 to drive the transmission gear 6 to rotate; when the slag discharging driving shaft 503 rotates in the reverse direction, the rotating piece 601 is separated from the ratchet wheel 602, and the transmission gear 6 does not rotate accordingly, realizing that the scraping plate 701 can rotate to effectively sort out the precipitates inside the reaction kettle 1 instead of swinging in place, improving the flexibility and efficiency of the work.

[0028] As an implementation manner of the present invention, the outer wall of the rotating bracket 7 is provided with teeth that mesh with the transmission gear 6, and multiple sets of scraping plates 701 are fixed on the outer wall of the rotating bracket 7, and the outer wall of the scraping plate 701 is in close contact with the inner wall of the bottom of the reaction kettle 1, which is beneficial to the rotating bracket 7 being able to rotate smoothly following the transmission gear 6. The multiple sets of scraping plates 701 move cooperatively, improving the comprehensiveness and efficiency of slag scraping, and avoiding the problem of incomplete cleaning caused by the limited coverage range of a single scraping plate 701.

[0029] Working principle: When the waste acid treatment of hot-dip galvanizing is finished with the mixed reactor waste liquid treatment, the waste acid inside the reactor is neutralized and left to stand for a period of time. After the sediment and the supernatant are separated, the electric push rod 2 can be started to drive the pressing head 3 to move toward the slag discharge port 12. When the pressing head 3 moves to fit the slag discharge port 12, since the diameter of the pressing head 3 is the same as that of the slag discharge port 12, and a sealing rubber pad is installed on the side wall of the pressing head 3, the sealing rubber pad has good elasticity and sealing, which can effectively prevent the sediment and moisture from leaking out during the pressing process. Therefore, the sediment located on the inner wall of the slag discharge port 12 will be in a closed space. With the movement of the pressing head 3, the pressing head 3 will first First, the third rack 505 is contacted and squeezed. Due to the inclined design of the end of the third rack 505, the third rack 505 will be squeezed and pushed and move backward. The third rack 505 is meshed with the slag discharge driving shaft 503. When the third rack 505 moves backward, the slag discharge driving shaft 503 is driven to rotate. The rotation of the slag discharge driving shaft 503 will synchronously drive the fourth rack 506 to move forward to prepare for the subsequent resetting work. When the slag discharge driving shaft 503 rotates, it drives the slag discharge driving gear 504 fixed at its bottom end to rotate. Through the meshing of the slag discharge driving gear 504 and the slag discharge rotating ring 5, the slag discharge rotating ring 5 is driven to rotate. The inner wall teeth mesh with the slag discharge driven gear 501 installed on the outer side wall of the slag discharge blade 502, so the slag discharge blade 502 will be driven to rotate, and finally fit together to form a tightly closed state, effectively preventing the sediment from leaking out from the slag discharge port 12 during the pressing process, ensuring the smooth progress of the pressing work. As the pressing head 3 continues to descend, the pressing head 3 squeezes the first rack 405. Similarly, the first rack 405 will move backward to drive the sealing active shaft 403 to rotate, and drive the second rack 406 to move forward. At the same time, it drives the sealing drive ring 4 to rotate, driving the sealing blade 402 to open, releasing its original closed state, so that the sediment can The precipitate can fall onto the slag discharge blade 502, and the pressing head 3 continues to press down to squeeze the precipitate. In this process, the filter screen 301 and the one-way valve 302 work together. The filter screen 301 can filter the precipitate and prevent larger particles from passing through, thereby ensuring the relative purity of the water entering the inner wall of the reactor 1, while the one-way valve 302 plays a role in controlling the direction of the water flow. It only allows the water in the precipitate to flow toward the inner wall of the reactor 1 when squeezed, and will not allow the water that has entered the inner wall of the reactor 1 to flow back out. The water in the precipitate will be squeezed and re-enter the inner wall of the reactor 1 without affecting the precipitate that has been squeezed, thereby ensuring the squeezing effect of the precipitate. After the pressing work is completed, the electric push rod 2 drives the pressing head 3 to rise and reverse to its original position. The pressing head 3 will first contact and squeeze the second rack 406, driving the sealing drive shaft 403 to rotate in the reverse direction, so that the sealing blades 402 are closed again to form a sealed state, preventing untreated materials from mixing into the precipitates that have been pressed during the subsequent slag discharge process, ensuring the purity of the slag discharge. The pressing head 3 continues to rise, contacts and squeezes the fourth rack 506, driving the slag discharge drive shaft 503 to rotate in the reverse direction, causing the slag discharge blades 502 to open. At this time, the precipitates that have completed the pressing work are discharged from the reaction kettle 1 through the opened slag discharge blades 502. At the same time, the reverse rotation of the slag discharge drive shaft 503, through the cooperation of the ratchet 602 installed at its top and the rotating piece 601, drives the transmission gear 6 to rotate synchronously. Since the transmission gear 6 meshes with the rotating bracket 7, the rotating bracket 7 will rotate, driving the multiple scraping plates 701 installed on its outer wall to rotate, sorting the precipitates inside the reaction kettle 1, guiding the more dispersed and disordered precipitates into the slag discharge port 12, avoiding the accumulation of precipitates, creating good conditions for the subsequent pressing work, and enabling the subsequent pressing work to be carried out more efficiently; When the precipitates inside the reaction kettle 1 gradually decrease, the pressure sensor 202 installed at the bottom of the inner wall of the reaction kettle 1 senses the remaining amount of precipitates in the reaction kettle 1, regulating the moving distance of the compensation rod 201. The compensation rod 201 can provide additional assistance to the electric push rod 2, increasing the stroke of the electric push rod 2, enabling the electric push rod 2 to drive the pressing head 3 to perform a more sufficient pressing action, ensuring that the precipitates in the reaction kettle 1 can be pressed as clean as possible, improving the efficiency and quality of waste acid treatment, reducing the links and time of manual operation, increasing the treatment efficiency, and reducing the production cost.

[0030] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mixing reactor for treating waste acid from hot-dip galvanizing, comprising a reactor (1), a stirring rod (11) and a slag discharge port (12), characterized in that: An electric push rod (2) is installed at the bottom end of the stirring rod (11). The extending end of the electric push rod (2) is connected to a compensation rod (201). A pressure sensor (202) for controlling the compensation rod (201) is installed at the bottom of the inner wall of the reaction kettle (1). A pressing head (3) is fixed at the bottom end of the compensation rod (201). A filter screen (301) is arranged at the end of the inner cavity of the pressing head (3). A one-way valve (302) is installed in the cavity. Above the upper region of the inner wall of the slag discharge port (12), a sealing blade (402) is installed through a sealing component. Below the lower region of the inner wall of the slag discharge port (12), a slag discharge component is installed through a slag discharge component. A slag scraping component is installed on the inner wall of the reaction kettle (1). The sealing component includes a sealing driven gear (401) installed on the outer side wall of the sealing blade (402), and a sealing driving ring (4) rotatably installed on the inner wall of the slag discharge port (12). Teeth meshing with the sealing driven gear (401) are arranged on the inner wall of the sealing driving ring (4). It also includes a sealing driving shaft (403) rotatably installed on the inner wall of the slag discharge port (12). A sealing driving gear (404) meshing with the teeth on the outer side wall of the sealing driving ring (4) is installed at the bottom end of the sealing driving shaft (403). A first rack (405) and a second rack (406) are meshed oppositely on both sides of the sealing driving shaft (403).

2. The mixing reactor for treating waste acid from hot-dip galvanizing according to claim 1, characterized in that: A sealing rubber pad is installed on the side wall of the pressing head (3), and the diameter of the pressing head (3) is equal to the diameter of the slag discharge port (12).

3. The mixed reaction kettle for treating hot-dip galvanized waste acid according to claim 2, characterized in that: The slag discharge component includes a slag discharge driven gear (501) installed on the outer side wall of the slag discharge blade (502), and a slag discharge rotating ring (5) rotatably installed on the inner wall of the slag discharge port (12). Teeth meshing with the slag discharge driven gear (501) are arranged on the inner wall of the slag discharge rotating ring (5). It also includes a slag discharge driving shaft (503) rotatably installed on the inner wall of the slag discharge port (12). A slag discharge driving gear (504) meshing with the teeth on the outer side wall of the slag discharge rotating ring (5) is installed at the bottom end of the slag discharge driving shaft (503). A third rack (505) and a fourth rack (506) are meshed oppositely on both sides of the slag discharge driving shaft (503).

4. A mixing reactor for treating waste acid from hot-dip galvanizing according to claim 3, characterized in that: Four sealing blades (402) and slag discharge blades (502) are respectively installed on the inner wall of the slag discharge port (12). The sealing blades (402) are located above the slag discharge blades (502). After the four sealing blades (402) and the slag discharge blades (502) rotate and close, they are in a tightly attached closed state.

5. A mixing reactor for treating waste acid from hot-dip galvanizing according to claim 4, characterized in that: The first rack (405), the third rack (505), the second rack (406) and the fourth rack (506) are arranged vertically in sequence, and the racks are all located above the sealing blade (402).

6. The mixed reaction kettle for treating hot-dip galvanized waste acid according to claim 5, characterized in that: The distance between the first rack (405) and the second rack (406), and the distance between the third rack (505) and the fourth rack (506) are greater than the thickness of the pressing head (3).

7. A mixing reactor for treating waste acid from hot-dip galvanizing according to claim 6, characterized in that: The end parts of the first rack (405) and the second rack (406), and the third rack (505) and the fourth rack (506) close to the sealing blade (402) are respectively designed to be inclined oppositely.

8. A mixing reactor for treating hot-dip galvanized waste acid according to claim 7, characterized in that: The slag scraping assembly includes a transmission gear (6) rotatably installed at the top end of the slag discharge driving shaft (503). A rotating piece (601) is rotatably installed on the inner wall of the bottom cavity of the transmission gear (6). A ratchet wheel (602) corresponding to the rotating piece (601) is installed on the outer wall of the top end of the slag discharge driving shaft (503). It further includes a rotating bracket (7) rotatably installed on the inner wall of the bottom of the reaction kettle (1), and a scraping plate (701) is fixed to the outer wall of the rotating bracket (7).

9. A mixing reactor for treating waste acid from hot-dip galvanizing according to claim 8, characterized in that: Tooth teeth meshing with the transmission gear (6) are provided on the outer wall of the rotating bracket (7), and multiple groups of scraping plates (701) are fixed to the outer wall of the rotating bracket (7), and the outer wall of the scraping plate (701) is in close contact with the inner wall of the bottom of the reaction kettle (1).

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