Environment-friendly waste acid solution treatment equipment

Abstract

The utility model discloses environment-friendly waste acid liquid treatment equipment, and relates to the technical field of waste liquid treatment. The device comprises a base, a neutralization tank, a pretreatment tank and an alkali solution tank, the neutralization tank and the alkali solution tank are respectively fixed at the upper end of the base, the pretreatment tank is fixed at the upper end of the alkali solution tank, a cover plate is arranged at the upper end of the pretreatment tank, and the cover plate is fixed with the pretreatment tank through a rotating buckle. The surface of the lower end of the cover plate is in threaded connection with a first screen drum and a second screen drum respectively, and filter screens used for separating metal particles are arranged on the wall body of the first screen drum and the wall body of the second screen drum. When the acid solution is discharged, the fine-hole filter screen is used for screening again, metal particles are prevented from entering the neutralization tank, and then the device plays a role in timely supplementing the neutralization solution in the neutralization tank through the PH value sensor, the first electromagnetic control valve, the material conveying pump and the alkali solution box.

Description

Technical Field

[0001] This utility model belongs to the field of waste liquid treatment technology, specifically, it relates to an environmentally friendly waste acid liquid treatment device. Background Technology

[0002] Acidic substances are often used in industrial production to remove rust from the surface of steel. The pickling solution after use contains a large number of metallic impurities, and its random discharge will cause serious environmental pollution.

[0003] The most common existing technology is to neutralize the waste pickling solution to make it meet the discharge standards before it is discharged. However, the metal impurities in the pickling waste solution are not recovered, and the existing equipment cannot replenish the neutralizing solution in a timely manner, which can easily lead to a decrease in the neutralization efficiency of the acidic waste solution. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide an environmentally friendly waste acid treatment equipment.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] An environmentally friendly waste acid treatment device includes a base, a neutralization tank, a pretreatment tank, and an alkaline solution tank. The neutralization tank and the alkaline solution tank are fixed to the upper end of the base. The pretreatment tank is fixed to the upper end of the alkaline solution tank. The upper end of the pretreatment tank is provided with a cover plate, which is fixed to the pretreatment tank by a rotating buckle. The lower end surface of the cover plate is threaded with a first screen and a second screen. The walls of the first screen and the second screen are provided with filter screens for separating metal particles. The pore size of the filter screen of the first screen is larger than that of the filter screen of the second screen. One side of the pretreatment tank is connected to the negative pressure end of a liquid pump through a liquid guide pipe. The liquid pump is installed on the top of the tank cover of the neutralization tank. One end of the liquid guide pipe extends to the middle of the mounting sleeve inside the pretreatment tank. The outside of the mounting sleeve is threaded with an isolation cover. A fine-pore filter screen is installed in the middle of the isolation cover to prevent metal particles from entering the liquid guide pipe.

[0007] The lid is connected to the neutralization tank by screws. A neutralizing agent tube for supplying alkaline solution is connected to the front end of the neutralization tank. A pH sensor is installed on one side of the neutralization tank. The detection end of the pH sensor extends into the interior of the neutralization tank. An annular tube is installed inside the neutralization tank. One end of the annular tube passes through the neutralization tank through a connecting tube and is connected to the outlet of the liquid pump. A drain valve is installed at the lower end of one side of the neutralization tank.

[0008] One end of the neutralizing agent tube extends into the interior of the alkaline solution tank and is connected to the first electromagnetic control valve. The other end of the first electromagnetic control valve is connected to the outlet of the feed pump. The other end of the feed pump passes through the partition in the middle of the alkaline solution tank through a pipe and extends into the alkaline solution.

[0009] Optionally, a first liquid level sensor is also installed on the upper part of the partition of the alkaline solution tank. The detection end of the first liquid level sensor extends through to the bottom of the partition. The interior of the alkaline solution tank is provided with a cavity for placing alkaline solution. One side of the cavity is connected to a replenishment pipe, and the port of the replenishment pipe is provided with a sealing plug.

[0010] Optionally, a plurality of atomizing nozzles are installed on the inner surface of the annular tube.

[0011] Optionally, a stirring motor for mixing alkaline solution and acidic waste liquid is installed at the upper end of the tank cover. The auger of the stirring motor extends into the interior of the neutralization tank. A second liquid level sensor and an infrared temperature sensor are also installed on both sides of the upper end of the tank cover. The detection ends of the second liquid level sensor and the infrared temperature sensor extend to the bottom of the tank cover.

[0012] Optionally, the neutralization tank has an electric heating wire inside its wall, and a base pad is installed on the outside of the neutralization tank by a fixing hoop, with insulation cotton in contact with the surface of the neutralization tank on the inside of the base pad.

[0013] Optionally, the cover plate has a recessed groove in the middle for mounting the rotating disk. The recessed groove is provided with a first ball bearing that contacts the rotating disk. A rotary joint is installed in the middle of the upper end of the rotating disk. The upper end of the rotary joint is connected to a second electromagnetic control valve, and the upper end of the second electromagnetic control valve is connected to an acid waste liquid pipe.

[0014] Optionally, a driven gear ring is fixed to the outer side of the upper end of the rotating disk. The outer side of the driven gear ring meshes with the drive gear, and the drive gear is fixedly installed outside the output shaft of the stepper motor. The stepper motor is fixed to the upper end of the sealing cover by a chassis and bracket. An L-shaped pressure plate is fixed to the other side of the upper end of the sealing cover by screws, and the lower end surface of the L-shaped pressure plate is provided with a second ball that contacts the upper surface of the rotating disk.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0016] 1. This utility model uses a pretreatment box to screen out metal impurity particles in the neutralized acidic waste liquid, thereby avoiding direct discharge of metal particles that pollute the environment and hinder the recycling of metal resources. The metal particles in the acidic waste liquid are screened sequentially using the filter screens of the first and second sieve cylinders. When the acid solution is discharged, it is screened again using a fine-mesh filter to prevent metal particles from entering the neutralization tank. Secondly, the device uses a pH sensor, a first electromagnetic control valve, a feed pump, and an alkaline solution tank to replenish the neutralized liquid in the neutralization tank in a timely manner. The pH sensor can monitor the pH value of the mixture of acidic waste liquid and alkaline solution. When the pH value is still acidic, it indicates that alkaline solution needs to be added. At this time, the first electromagnetic control valve and the feed pump are turned on to transport the alkaline solution in the alkaline solution tank into the neutralization tank.

[0017] 2. This utility model takes into account that when using the first and second screen cylinders to filter metal particles in acidic waste liquid, some metal particles may clog the filter screen. Therefore, a structure is designed in which a stepper motor drives a gear and a driven gear ring to rotate the rotating disk. When the rotating disk rotates, the second and first screen cylinders will rotate synchronously. The motor driver of the drive motor can be programmed as needed, that is, the rotation direction can be changed every hour, so that the metal particles attached to the surface of the filter screen can be loosened and fallen off by changing the rotation direction.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0021] Figure 2 This is a structural diagram of the combined pretreatment box, the first sieve cylinder, and the second sieve cylinder in this utility model;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure of part A in the diagram;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure of part B in the diagram;

[0024] Figure 5 for Figure 2 A schematic diagram of the structure of part C in the diagram;

[0025] Figure 6 for Figure 2 A schematic diagram of the structure of part D in the diagram;

[0026] Figure 7 for Figure 2 A schematic diagram of the structure of part E in the diagram.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Base; 2. Alkaline solution tank; 3. Pretreatment tank; 4. Cover plate; 5. Rotary buckle; 6. First sieve cylinder; 7. Second sieve cylinder; 8. Filter screen; 9. Liquid guide pipe; 10. Liquid pump; 11. Tank lid; 12. Neutralization tank; 13. Mounting sleeve; 14. Isolation cover; 15. Fine pore filter screen; 16. Neutralizing agent pipe; 17. pH sensor; 18. Ring pipe; 19. Drain valve; 20. First solenoid control valve; 21. Feed pump; 22. First liquid level sensor; 23. 24. Liquid replenishment pipe; 25. Atomizing nozzle; 26. Stirring motor; 27. Second liquid level sensor; 28. Infrared temperature sensor; 29. ​​Electric heating wire; 30. Fixing clamp; 31. Base pad; 32. Insulation cotton; 33. Rotating disk; 34. First ball bearing; 35. Rotary joint; 36. Second electromagnetic control valve; 37. Acid waste liquid pipe; 38. Driven gear ring; 39. Stepper motor; 40. Chassis; 41. L-shaped pressure plate; 42. Second ball bearing.

[0029] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Please see Figures 1 to 7This utility model provides a technical solution: an environmentally friendly waste acid treatment device, including a base 1, a neutralization tank 12, a pretreatment tank, and an alkaline solution tank 2. The neutralization tank 12 and the alkaline solution tank 2 are fixed to the upper end of the base 1, and a pretreatment tank 3 is fixed to the upper end of the alkaline solution tank 2. A cover plate 4 is provided at the upper end of the pretreatment tank 3. The cover plate 4 is fixed to the pretreatment tank 3 by a rotating buckle 5. A first screen cylinder 6 and a second screen cylinder 7 are threadedly connected to the lower surface of the cover plate 4, respectively. The walls of the first screen cylinder 6 and the second screen cylinder 7 are... The body is equipped with a filter screen 8 for separating metal particles. The filter screen 8 of the first screen cylinder 6 has a larger aperture than the filter screen 8 of the second screen cylinder 7. One side of the pretreatment tank is connected to the negative pressure end of the liquid pump 10 through the liquid guide pipe 9. The liquid pump 10 is installed on the top of the tank cover 11 of the neutralization tank 12. One end of the liquid guide pipe 9 extends through to the middle of the mounting sleeve 13 inside the pretreatment tank 3. The mounting sleeve 13 is externally threaded with an isolation cover 14. A fine-pore filter screen 15 is installed in the middle of the isolation cover 14 to prevent metal particles from entering the liquid guide pipe 9.

[0032] The lid 11 is connected to the neutralization tank 12 by screws. A neutralizing agent tube 16 for supplying alkaline solution is connected to the front end of the neutralization tank 12. A pH sensor 17 is installed on one side of the neutralization tank 12. The detection end of the pH sensor 17 extends into the interior of the neutralization tank 12. An annular tube 18 is installed inside the neutralization tank 12. One end of the annular tube 18 passes through the neutralization tank 12 through a connecting tube and is connected to the outlet end of the liquid pump 10. A drain valve 19 is installed at the lower end of one side of the neutralization tank 12.

[0033] One end of the neutralizing agent pipe 16 extends into the interior of the alkaline solution tank 2 and is connected to the first electromagnetic control valve 20. The other end of the first electromagnetic control valve 20 is connected to the outlet of the feed pump 21. The other end of the feed pump 21 passes through a pipe through the partition in the middle of the alkaline solution tank 2 and extends into the alkaline solution. Considering that the most common method in the prior art is to neutralize the waste acid pickling liquid to meet the discharge standards before discharge, but without recovering the metal impurities in the acid pickling waste liquid, this device can screen out the metal impurity particles in the neutralized acidic waste liquid through the pretreatment tank 3, thereby avoiding the direct discharge of metal particles that pollutes the environment and is not conducive to the recycling of metal resources. The metal particles are sequentially screened using the filter screens 8 of the first screen cylinder 6 and the second screen cylinder 7. When the acid solution is discharged, it is screened again using the fine-mesh filter screen 15 to prevent metal particles from entering the neutralization tank 12. Secondly, the device uses the pH sensor 17, the first electromagnetic control valve 20, the feed pump 21, and the alkaline solution tank 2 to replenish the neutralization liquid in the neutralization tank 12 in a timely manner. That is, the pH sensor 17 can monitor the pH value of the mixture of acidic waste liquid and alkaline solution. When the pH value is still acidic, it indicates that alkaline solution needs to be added. At this time, the first electromagnetic control valve 20 and the feed pump 21 are opened to transport the alkaline solution in the alkaline solution tank 2 into the interior of the neutralization tank 12.

[0034] The alkaline solution tank 2 is equipped with a first liquid level sensor 22 at the upper part of the partition. The detection end of the first liquid level sensor 22 extends through to the bottom of the partition. The alkaline solution tank 2 has a cavity for placing alkaline solution inside. One side of the cavity is connected to a replenishment pipe 23. The port of the replenishment pipe 23 is equipped with a sealing plug. By setting the first liquid level sensor 22, the user can know the liquid level of the alkaline solution in the alkaline solution tank 2. When the liquid level of the alkaline solution is insufficient, the equipment maintenance personnel can replenish it through the replenishment pipe 23.

[0035] The inner surface of the annular pipe 18 is equipped with multiple atomizing nozzles 24. In order to help the acidic waste liquid and the alkaline solution mix thoroughly, the acidic waste liquid is drawn in by the liquid pump 10 under negative pressure and sent to the annular pipe 18, and then pressurized and sprayed into the alkaline solution inside the neutralization tank 12 through the atomizing nozzles 24.

[0036] The upper end of the tank cover 11 is equipped with a stirring motor 25 to assist in mixing alkaline solution and acidic waste liquid. The auger of the stirring motor 25 extends into the interior of the neutralization tank 12. A second liquid level sensor 26 and an infrared temperature sensor 27 are also installed on both sides of the upper end of the tank cover 11. The detection ends of the second liquid level sensor 26 and the infrared temperature sensor 27 extend to the bottom of the tank cover 11. Considering that temperature can help improve the neutralization efficiency during the acid-base neutralization process, the neutralization tank 12 can be adjusted by the electric heating wire 28 to regulate the reaction temperature of the neutralization tank 12, and the infrared temperature sensor 27 can detect the temperature of the mixed liquid.

[0037] The neutralization tank 12 has an electric heating wire 28 inside its wall. A base pad 30 is installed on the outside of the neutralization tank 12 by a fixing hoop 29. The inner side of the base pad 30 is provided with heat insulation cotton 31 that contacts the surface of the neutralization tank 12. The heat insulation cotton 31 keeps the body of the neutralization tank 12 warm after heating, thus preventing heat loss.

[0038] The cover plate 4 has a groove in the middle for mounting the rotating disk 32. The groove is equipped with a first ball bearing 33 that contacts the rotating disk 32. A rotary joint 34 is installed in the middle of the upper end of the rotating disk 32. The upper end of the rotary joint 34 is connected to a second electromagnetic control valve 35. The upper end of the second electromagnetic control valve 35 is connected to an acid waste liquid pipe 36. By setting the rotary joint 34, the rotation of the rotating disk 32 is not affected while the acid waste liquid pipe 36 injects acidic waste liquid into the pretreatment tank.

[0039] The rotating disk 32 has a driven gear ring 37 fixed to its upper outer side. The outer side of the driven gear ring 37 meshes with the drive gear 38, which is fixedly installed outside the output shaft of the stepper motor 39. The stepper motor 39 is fixed to the upper end of the sealing cover by the housing 40 and the bracket. An L-shaped pressure plate 41 is fixed to the other side of the upper end of the sealing cover by screws. The lower surface of the L-shaped pressure plate 41 is provided with a second ball bearing 42 that contacts the upper surface of the rotating disk 32. Considering that some metal particles may clog the filter screen 8 when filtering metal particles in acidic waste liquid using the first screen cylinder 6 and the second screen cylinder 7, the rotating disk 32 is designed to rotate by the stepper motor 39 through the drive gear 38 and the driven gear ring 37. When the rotating disk 32 rotates, the second screen cylinder 7 and the first screen cylinder 6 will rotate synchronously. The motor driver of the drive motor can be programmed as needed, that is, the rotation direction is changed every hour, so that the metal particles attached to the surface of the filter screen 8 can be loosened and fall off by changing the rotation direction.

[0040] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. An environmentally friendly waste acid treatment device, comprising a base (1), a neutralization tank (12), a pretreatment tank, and an alkaline solution tank (2), characterized in that, The upper end of the base (1) is fixed with a neutralization tank (12) and an alkaline solution tank (2). A pretreatment tank (3) is fixed to the upper end of the alkaline solution tank (2). A cover plate (4) is provided on the upper end of the pretreatment tank (3). The cover plate (4) is fixed to the pretreatment tank (3) by a rotating buckle (5). A first sieve cylinder (6) and a second sieve cylinder (7) are threaded onto the lower surface of the cover plate (4). Filter screens (8) for separating metal particles are provided on the walls of the first sieve cylinder (6) and the second sieve cylinder (7). The first sieve cylinder (6)... The filter screen (8) has a larger aperture than the filter screen (8) of the second sieve cylinder (7). One side of the pretreatment tank is connected to the negative pressure end of the liquid pump (10) through the liquid guide pipe (9). The liquid pump (10) is installed on the top of the tank cover (11) of the neutralization tank (12). One end of the liquid guide pipe (9) extends through to the middle of the mounting sleeve (13) inside the pretreatment box (3). The external thread of the mounting sleeve (13) is connected to the isolation cover (14). The middle of the isolation cover (14) is equipped with a fine-pore filter screen (15) to prevent metal particles from entering the liquid guide pipe (9). The lid (11) is connected to the neutralization tank (12) by screws. A neutralizing agent tube (16) for supplying alkaline solution is connected to the front end of the neutralization tank (12). A pH sensor (17) is installed on one side of the neutralization tank (12). The detection end of the pH sensor (17) extends into the interior of the neutralization tank (12). An annular tube (18) is installed inside the neutralization tank (12). One end of the annular tube (18) passes through the neutralization tank (12) through a connecting tube and is connected to the outlet end of the liquid pump (10). A drain valve (19) is installed at the lower end of one side of the neutralization tank (12). One end of the neutralizing agent tube (16) extends into the interior of the alkaline solution tank (2) and is connected to the first electromagnetic control valve (20). The other end of the first electromagnetic control valve (20) is connected to the outlet of the feed pump (21). The other end of the feed pump (21) extends into the alkaline solution through a pipe through the partition in the middle of the alkaline solution tank (2).

2. The environmentally friendly waste acid treatment equipment according to claim 1, characterized in that, The upper part of the partition of the alkaline solution tank (2) is also equipped with a first liquid level sensor (22). The detection end of the first liquid level sensor (22) extends through to the bottom of the partition. The interior of the alkaline solution tank (2) is provided with a cavity for placing alkaline solution. One side of the cavity is connected to a replenishment pipe (23). The port of the replenishment pipe (23) is provided with a sealing plug.

3. The environmentally friendly waste acid treatment equipment according to claim 1, characterized in that, Multiple atomizing nozzles (24) are installed on the inner surface of the annular tube (18).

4. The environmentally friendly waste acid treatment equipment according to claim 1, characterized in that, The upper end of the tank cover (11) is equipped with a stirring motor (25) to assist in mixing alkaline solution and acidic waste liquid. The auger of the stirring motor (25) extends into the interior of the neutralization tank (12). A second liquid level sensor (26) and an infrared temperature sensor (27) are also installed on both sides of the upper end of the tank cover (11). The detection ends of the second liquid level sensor (26) and the infrared temperature sensor (27) extend to the bottom of the tank cover (11).

5. The environmentally friendly waste acid treatment equipment according to claim 1, characterized in that, The neutralization tank (12) has an electric heating wire (28) inside its wall. A base pad (30) is installed on the outside of the neutralization tank (12) by a fixing hoop (29), and the inner side of the base pad (30) is provided with heat-insulating cotton (31) that contacts the surface of the neutralization tank (12).

6. The environmentally friendly waste acid treatment equipment according to claim 1, characterized in that, The cover plate (4) has a groove in the middle for mounting the rotating disk (32). The groove is provided with a first ball (33) that contacts the rotating disk (32). A rotary joint (34) is installed in the middle of the upper end of the rotating disk (32). The upper end of the rotary joint (34) is connected to a second electromagnetic control valve (35). The upper end of the second electromagnetic control valve (35) is connected to an acid waste liquid pipe (36).

7. The environmentally friendly waste acid treatment equipment according to claim 6, characterized in that, A driven gear ring (37) is fixed to the outer side of the upper end of the rotating disk (32). The outer side of the driven gear ring (37) meshes with the drive gear (38), and the drive gear (38) is fixedly installed outside the output shaft of the stepper motor (39). The stepper motor (39) is fixed to the upper end of the sealing cover through the housing (40) and the bracket. An L-shaped pressure plate (41) is fixed to the other side of the upper end of the sealing cover by screws. The lower end surface of the L-shaped pressure plate (41) is provided with a second ball (42) that contacts the upper surface of the rotating disk (32).

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