Waste acid solution treatment device

Abstract

The invention relates to the technical field of reaction kettles, and particularly discloses a waste acid solution treatment device which comprises a reaction kettle, a stirring mechanism and a heating mechanism are arranged in the reaction kettle, the stirring mechanism comprises a stirring shaft, stirring blades and a partition plate group, and the partition plate group comprises a fan-shaped partition plate I and a fan-shaped partition plate II; the first partition plate and the second partition plate are in sliding fit so that the interior of the reaction kettle can be divided into an upper cavity and a lower cavity, the upper cavity and the lower cavity are subjected to heat insulation, and the lifting mechanism is used for controlling lifting of the partition plate set. The valve is installed on the first partition plate or the second partition plate and used for communicating the upper cavity with the lower cavity. The reaction kettle has the beneficial effects that the energy consumption can be reduced, and the reaction kettle is prevented from overflowing.

Description

Technical Field

[0001] The invention relates to the technical field of reactors, and in particular to a waste acid solution treatment device. Background Art

[0002] When treating the waste acid generated by the panel industry, the waste acid is first transferred from the ton barrel to the reactor, and an alkaline solution is added while stirring. After a period of reaction, steam heating is started. When the temperature of the waste acid solution in the reactor rises to 50°C, the heating is turned off, and the hydrogen peroxide begins to decompose. Sampling and analysis are performed. When the concentration of hydrogen peroxide is less than 0.3%, the reaction is completed. After that, the reaction liquid enters the displacement column through a circulation pump, and the copper in the reaction liquid is replaced by iron powder to recover the sponge copper. Finally, it undergoes four-effect evaporation and concentration to effectively reduce COD, ammonia nitrogen and other pollution factors in the liquid. Then it enters the waste liquid center for biochemical degradation treatment, the wastewater is discharged in compliance with the standards, and the residual liquid is evaporated to achieve harmless disposal of the waste acid.

[0003] The Chinese patent document with announcement number CN216172331U discloses a reaction kettle for preventing overflow, comprising a kettle body, a stirring rod is arranged in the kettle body, the upper end of the stirring rod penetrates the top of the kettle body and is connected with the output shaft of the reduction motor, the bottom of the kettle body is provided with a discharge port, the side wall of the kettle body is provided with a feed port, the upper end of the stirring rod is connected with a bubble scraping component, a plurality of bubble scraping holes are opened in the bubble scraping component, a bubble suction cover is arranged above the bubble scraping component, a bubble suction cover is connected with a bubble suction pipe component, the bubble suction pipe component penetrates the top wall of the kettle body and is connected with a defoaming pool through an air suction pump, during the rotation of the stirring rod, the bubble scraping component connected to the stirring rod is driven to rotate, the bubble scraping component contacts with the generated bubbles during the rotation and scrapes the bubbles, so as to avoid the waste of raw materials and the occurrence of safety accidents caused by the overflow of bubbles, and the bubbles not scraped by the bubble scraping component enter the bubble suction cover under the action of the air suction pump, and enter the defoaming pool through the bubble suction pipe component for defoaming treatment.

[0004] In the prior art, since the waste acid solution generated by the panel industry contains hydrogen peroxide, the waste liquid in the reactor needs to be heated as a whole in the initial stage of hydrogen peroxide decomposition. The decomposition of hydrogen peroxide will release heat, resulting in high energy consumption in the initial stage. In the later stage, the waste liquid temperature is too high, causing the hydrogen peroxide to decompose too quickly and easily overflow the tank. Summary of the invention

[0005] The present invention provides a waste acid solution treatment device, aiming to solve the problems in the related art of high initial energy consumption and excessively high waste liquid temperature in the later stage, which leads to excessively rapid decomposition of hydrogen peroxide and easy overflow of the tank.

[0006] A waste acid solution treatment device comprises a reactor, wherein a stirring mechanism and a heating mechanism are arranged in the reactor, wherein the stirring mechanism comprises a stirring shaft and a stirring blade, and further comprises: A partition plate group, the partition plate group includes a fan-shaped partition plate 1 and a partition plate 2, the partition plate 1 and the partition plate 2 are slidably matched to separate the reactor into two upper and lower chambers, and the upper and lower chambers are insulated; A lifting mechanism, used to control the lifting of the partition plate group; A valve, installed on the first partition plate or the second partition plate, for connecting the upper and lower chambers; The method for treating the waste acid solution comprises the following steps: S1, the lifting mechanism first controls the partition plate group to descend a certain distance below the liquid surface, and then the partition plate 1 and the partition plate 2 slide and unfold to separate the reactor into two upper and lower chambers; S2, after the heating mechanism heats the waste liquid in the upper chamber to 50° to 60°, the hydrogen peroxide in the waste liquid begins to decompose rapidly to release heat, and at the same time the heating is stopped and the lifting mechanism is started to control the partition plate group to descend, so that the waste liquid in the lower chamber is gradually transported to the upper chamber, so that the temperature in the upper chamber is maintained at 50° to 60°; S3, after the partition plate group contacts the stirring blade, the partition plate 1 and the partition plate 2 are first contracted to connect the upper and lower chambers, and then the lifting mechanism controls the partition plate group to rise and reset.

[0007] When dehydrogen peroxide is removed from the waste acid solution, the reactor is divided into two upper and lower chambers by a partition plate group, and then only the waste acid solution in the upper chamber is heated, so that the hydrogen peroxide in the waste acid solution in the upper chamber begins to decompose and release heat, and then moves downward through the partition plate group, and the waste acid solution with a lower temperature in the lower chamber enters the upper chamber through a valve, and the temperature of the solution in the upper chamber is maintained at 50° to 60°, thereby preventing the hydrogen peroxide from decomposing too quickly due to excessive temperature, thereby preventing the reactor from overflowing.

[0008] Preferably, a cavity for heat insulation is provided in both the first partition plate and the second partition plate.

[0009] Reduce the influence of heating the waste acid solution in the upper chamber on the temperature of the waste acid solution in the lower chamber.

[0010] Preferably, the lifting mechanism includes a sleeve rotatably mounted on the partition plate 1 and a connecting assembly for connecting the sleeve and the partition plate 1. The sleeve is sleeved on the stirring shaft and is threadedly engaged with the stirring shaft. A limit rod extending in the up and down directions is fixedly installed in the reactor, and the limit rod is passed through the partition plate 1. In S1, the connecting assembly fixedly connects the partition plate 1 and the sleeve together.

[0011] Preferably, the connecting assembly includes a slider disposed on a partition plate and a driving source for driving the slider to move, and a snap-in groove cooperating with the slider is provided on the outer ring of the sleeve.

[0012] Preferably, a pressure switch is installed on the partition plate group, and the pressure switch is triggered when the partition plate group moves downward and abuts against the stirring blade, at which time the stirring shaft reverses. A travel switch is installed on the reactor, and the partition plate group stops moving when it moves upward to trigger the travel switch.

[0013] Preferably, the partition plate 1 is provided with a driving source 2 for driving the partition plate 2 and for expanding the partition plate 1.

[0014] Spread out the partition plate 2 and the partition plate 1, thereby dividing the reactor into two upper and lower chambers.

[0015] Preferably, the outer circumferential surfaces of the partition plate 1 and the partition plate 2 are both provided with sealing strips that abut against the inner wall of the reaction kettle.

[0016] Improve the sealing between the partition plate 1 and the partition plate 2 and the inner wall of the reactor.

[0017] Preferably, a liquid outlet pipe connected to the valve liquid outlet is arranged above the valve, the liquid outlet pipe is provided with blades for stirring the liquid and a driving source three for driving the liquid outlet pipe to rotate, and a plurality of liquid spray holes connected to the liquid outlet pipe are opened on the blades.

[0018] The waste acid solution in the lower chamber is dispersed more evenly in the upper chamber after entering the upper chamber.

[0019] Preferably, the driving source three includes a gear ring slidably mounted on the stirring shaft and a gear mounted on the liquid outlet pipe for meshing with the gear ring.

[0020] By adopting the above technical solution, the beneficial effects of the present invention are as follows: The reactor is divided into two upper and lower chambers by a partition mechanism, and only the upper chamber is heated, so there is no need to heat the solution in the entire reactor, which reduces the heating time and reduces the energy consumption. By moving the expanded partition plate group downward, the waste acid solution in the lower chamber gradually enters the upper chamber through the one-way valve, so that the waste acid solution in the lower chamber is raised to 50° to 60° with the help of the temperature of the waste acid solution in the upper chamber, and the temperature of the waste acid solution in the upper chamber is maintained at 50° to 60°, thereby avoiding the decomposition rate of hydrogen peroxide in the upper chamber being too fast to cause the reactor to overflow, and the waste acid solution in the lower chamber does not need to consume additional energy for heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the reactor of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the liquid mixing mechanism of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the partition plate group of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the second driving source of the present invention.

[0026] Figure 6 It is a schematic structural diagram of the mounting ring of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the connecting ring of the present invention.

[0028] Figure 8 It is a schematic structural diagram of the stirring shaft of the present invention.

[0029] Fig. 9 It is a schematic structural diagram of the sleeve of the present invention.

[0030] Fig.10 It is a cross-sectional view of the reactor of the present invention.

[0031] Reference numerals: 1. Reactor; 11. Travel switch 1; 12. Travel switch 2; 2. Stirring mechanism; 21. Stirring shaft; 22. Stirring blade; 23. Annular stop; 3. Partitioning mechanism; 31. Partitioning plate group; 311. Partitioning plate 1; 312. Partitioning plate 2; 313. Through hole; 314. Connecting ring; 32. Limit rod; 33. Mounting ring; 34. Motor 1; 35. Arc rack; 4. Lifting mechanism; 41. Sleeve; 42. Sliding block; 43. Snap-in groove; 44. Elastic expansion block; 45. Motor 2; 5. Liquid mixing mechanism; 51. Valve; 52. Liquid outlet pipe; 53. Gear 2; 54. Gear 3; 55. Blade. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] like Figure 1-Figure 4 As shown, a waste acid solution treatment device of the present invention includes a reactor 1, a stirring mechanism 2, a heating mechanism, a partition mechanism 3, a lifting mechanism 4 and a liquid mixing mechanism 5. The stirring mechanism 2 is arranged in the reactor 1 for stirring the waste liquid. The partition mechanism 3 is arranged in the reactor 1 for dividing the reactor 1 into two upper and lower chambers. The heating mechanism is arranged in the reactor 1 for heating the waste liquid in the upper chamber. The lifting mechanism 4 is used to control the lifting of the partition mechanism 3 in the reactor 1. The liquid mixing mechanism 5 is used to transport the waste liquid in the lower chamber to the upper chamber and stir the waste liquid in the upper chamber.

[0034] like Figure 1-Figure 3 As shown, the stirring mechanism 2 includes a stirring motor, a stirring shaft 21 and a stirring blade 22. The stirring motor is installed at the upper end of the reactor 1. The stirring shaft 21 is passed through the top cover of the reactor 1, and the stirring shaft 21 is connected to the output end of the stirring motor. The stirring blade 22 is installed on the stirring shaft 21 near the bottom, and is used to stir the waste liquid in the reactor 1.

[0035] like Figure 2-Figure 7 As shown, the partition mechanism 3 includes two partition plate groups 31, a limit rod 32, a driving source 1 and a mounting ring 33, the mounting ring 33 is sleeved on the stirring shaft 21, one partition plate group 31 includes a partition plate 1 311 and a partition plate 2 312, the two partition plate groups 31 are arranged in a circumferential direction around the mounting ring 33, the partition plate 1 311 and the partition plate 2 312 are both fan-shaped, and the partition plate 1 311 and the partition plate 2 312 are coaxial with the mounting ring 33, and the inner side of the partition plate 1 311 is aligned with the mounting ring 33. The outer side of the partition plate 1 311 abuts against the inner wall of the reactor 1, and the limiting rod 32 extending in the up-down direction is fixedly installed in the reactor 1, and the limiting rod 32 is penetrated on the partition plate 1 311, and a fan-shaped expansion groove for shrinking the partition plate 2 312 is provided in the partition plate 1 311, and the inner and outer sides of the fan-shaped expansion groove are penetrated, so that the inner and outer sides of the partition plate 2 312 abut against the mounting ring 33 and the inner wall of the reactor 1 respectively, and the outer sides of the partition plate 1 311 and the partition plate 2 312 are The circumferential surface is provided with a sealing strip that abuts against the inner wall of the reactor 1. The mounting ring 33 is provided with a ring groove, and a connecting ring 314 is rotatably installed in the ring groove. The connecting ring 314 is fixedly connected to the inner side of the two partition plates 312. The partition plates 312 are provided with a cavity for heat insulation. The driving source 1 is arranged in one of the partition plate groups 31. The driving source 1 includes a motor 1 34 and an arc-shaped rack 35. One end of the arc-shaped rack 35 is installed in the fan-shaped telescopic groove of the partition plate 1 311, and the other end is inserted into the corresponding The motor 1 34 is installed in the cavity of the corresponding partition plate 2 312, and the motor 1 34 is provided with a gear 1 meshing with the arc-shaped rack 35. When the motor 1 34 drives the partition plate 2 312 to extend out from the partition plate 1 311 and abut against the other partition plate 1 311, the projections of the two partition plate groups 31 in the up and down directions form a complete circle, thereby dividing the reactor 1 into two upper and lower chambers. In the initial position, the partition plate group 31 is located above the liquid surface.

[0036] like Figure 4-Figure 10As shown, the lifting mechanism 4 includes a sleeve 41 and a connecting assembly. The sleeve 41 is sleeved on the stirring shaft 21 and is threadedly matched with the stirring shaft 21. The mounting ring 33 is sleeved on the sleeve 41, and the mounting ring 33 is rotatably connected to the sleeve 41. The connecting assembly includes a slider 42 slidably mounted on the mounting ring 33 along the radial direction of the reactor 1 and a driving source 2 for driving the slider 42 to move. The driving source 2 includes a motor 2 45 and a lead screw inserted in the slider 42. The lead screw is connected to the output end of the motor 2 45. The lead screw and the slider 42 are threadedly matched. A plurality of snap-in grooves 43 are provided on the outer ring of the sleeve 41. An elastic telescopic block 44 that matches the snap-in groove 43 is installed on the end of the slider 42 facing the mounting ring 33. When the motor 2 45 drives the slider 42 to move toward the mounting ring 33, when the elastic telescopic block 44 is engaged with the snap-in groove 43, When the telescopic block 44 is not aligned with the snap-in groove 43, the elastic telescopic block 44 first abuts against the mounting ring 33 and gradually shrinks into the slider 42. When the elastic telescopic block 44 is aligned with the snap-in groove 43, the elastic telescopic block 44 pops out and is inserted into the snap-in groove 43, thereby connecting the sleeve 41 with the partition plate 1 311, and thus making the sleeve 41 unable to rotate. At this time, when the stirring shaft 21 rotates, the sleeve 41 is driven downward by the thread, thereby driving the partition plate 1 311 to move downward. A travel switch 11 and a travel switch 2 12 of different heights are installed on the inner wall of the reactor 1. When the partition plate 1 311 moves downward and abuts against the travel switch 11, the travel switch 11 is triggered. At this time, the stirring shaft 21 reverses. When the partition plate group 31 moves upward to the initial position, the travel switch 2 12 is triggered to stop the partition plate group 31 from moving.

[0037] like Figure 2-Figure 5 As shown, the liquid mixing mechanism 5 includes a valve 51, a liquid outlet pipe 52 and a driving source 3. A through hole 313 penetrating the partition plate 311 is provided on the partition plate 1 311. The valve 51 is installed in the through hole 313. The valve 51 is a one-way valve. The waste liquid enters the upper chamber from bottom to top through the one-way valve. The liquid outlet pipe 52 is rotatably installed in the through hole 313. A blade 55 for stirring the liquid is installed on the liquid outlet pipe 52. A plurality of liquid spray holes connected to the liquid outlet pipe 52 are provided on the blade 55. The driving source 3 includes a gear 2 53 slidably installed on the stirring shaft 21 along the up-down direction and a gear 53 installed on the stirring shaft 21. The gear three 54, gear two 53 and mounting ring 33 on the liquid outlet pipe 52 are coaxially arranged and connected by a compression spring (not shown in the figure). When the compression spring is in the original length state, the gear two 53 and gear three 54 have the same height. At this time, the gear two 53 and gear three 54 are meshed. An annular baffle 23 is installed on the stirring shaft 21. When the partition plate one 311 is in the initial position, the annular baffle 23 presses the gear two 53 so that the gear two 53 presses the compression spring downward, so that the height of the gear two 53 is lower than the height of the gear three 54, thereby causing the gear two 53 and the gear three 54 to disengage.

[0038] The specific implementation method of the present invention for removing hydrogen peroxide from waste acid solution is as follows: S1, the motor 2 45 first drives the slider 42 to move toward the mounting ring 33, connects the sleeve 41 with the partition plate 1 311, and then the sleeve 41 drives the partition plate group 31 to descend 40 cm to 50 cm below the liquid surface, and the motor 1 34 drives the partition plate 2 312 to extend from the partition plate 1 311 and abut against the other partition plate 1 311, thereby dividing the reactor 1 into two upper and lower chambers, and at this time the stirring shaft 21 stops rotating; S2, the heating mechanism heats the waste liquid in the upper chamber to 50° to 60°, and the hydrogen peroxide in the waste liquid begins to decompose rapidly. Then the heating is stopped and the stirring shaft 21 is controlled to continue to rotate, so that the sleeve 41 continues to drive the partition plate group 31 to descend. At this time, the waste liquid in the lower chamber passes through the one-way valve and then enters the blade 55 through the liquid outlet pipe 52, and finally enters the upper chamber through the liquid injection hole on the blade 55, so that the temperature in the upper chamber is maintained at 50° to 60°; S3. After the partition plate 1 311 contacts the travel switch 11, the partition plate 1 311 and the partition plate 2 312 first contract to connect the upper and lower chambers, and then the stirring shaft 21 reverses and drives the partition plate group 31 to rise and reset through the sleeve 41. When the partition plate 1 311 moves upward and triggers the travel switch 2 12, the motor 2 45 drives the slider 42 to reset, so that the sleeve 41 and the partition plate 1 311 are disconnected.

[0039] In the prior art, when the waste acid solution is heated to remove hydrogen peroxide, the waste acid solution in the entire reactor 1 needs to be heated to 50° to 60°. Since the hydrogen peroxide releases heat, the overall temperature of the waste acid solution will increase. The temperature increase will accelerate the decomposition rate of hydrogen peroxide, thereby causing the decomposition rate of hydrogen peroxide in the waste acid solution to gradually accelerate, and then cause the reactor 1 to overflow. In the implementation method of removing hydrogen peroxide from the waste acid solution in the present invention, the reactor 1 is divided into two upper and lower chambers by the partition mechanism 3, and only the upper chamber is heated, so there is no need to heat the reactor 1. The solution in the entire reactor 1 needs to be heated, which reduces the heating time and energy consumption. By moving the unfolded partition plate group 31 downward, the waste acid solution in the lower chamber gradually enters the upper chamber through the one-way valve, so that the waste acid solution in the lower chamber is raised to 50° to 60° with the help of the temperature of the waste acid solution in the upper chamber, and the temperature of the waste acid solution in the upper chamber is maintained at 50° to 60°, thereby avoiding the decomposition rate of hydrogen peroxide in the upper chamber being too fast to cause the reactor 1 to overflow, and the waste acid solution in the lower chamber does not need to consume additional energy for heating.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A waste acid solution treatment device, comprising a reactor, wherein a stirring mechanism and a heating mechanism are arranged in the reactor, wherein the stirring mechanism comprises a stirring shaft and a stirring blade, wherein: Also includes: A partition plate group, the partition plate group includes a fan-shaped partition plate 1 and a partition plate 2, the partition plate 1 and the partition plate 2 are slidably matched to separate the reactor into two upper and lower chambers, and the upper and lower chambers are insulated; A lifting mechanism, used for controlling the lifting of the partition plate group; A valve, installed on the first partition plate or the second partition plate, for connecting the upper and lower chambers; The method for treating the waste acid solution comprises the following steps: S1, the lifting mechanism first controls the partition plate group to descend a certain distance below the liquid surface, and then the partition plate 1 and the partition plate 2 slide and unfold to separate the reactor into two upper and lower chambers; S2, after the heating mechanism heats the waste liquid in the upper chamber to 50° to 60°, the hydrogen peroxide in the waste liquid begins to decompose rapidly to release heat, and at the same time the heating is stopped and the lifting mechanism is started to control the partition plate group to descend, so that the waste liquid in the lower chamber is gradually transported to the upper chamber, so that the temperature in the upper chamber is maintained at 50° to 60°; S3, after the partition plate group contacts the stirring blade, the partition plate 1 and the partition plate 2 are first contracted to connect the upper and lower chambers, and then the lifting mechanism controls the partition plate group to rise and reset.

2. A waste acid solution treatment device according to claim 1, characterized in that: The first partition plate and the second partition plate are both provided with cavities for heat insulation.

3. The waste acid solution treatment device according to claim 1, characterized in that: The lifting mechanism includes a sleeve rotatably mounted on the partition plate 1 and a connecting assembly for connecting the sleeve and the partition plate 1. The sleeve is sleeved on the stirring shaft and is threadedly engaged with the stirring shaft. A limit rod extending in the up and down directions is fixedly installed in the reactor, and the limit rod is passed through the partition plate 1. In S1, the connecting assembly fixedly connects the partition plate 1 and the sleeve together.

4. A waste acid solution treatment device according to claim 3, characterized in that: The connecting assembly comprises a slider arranged on a partition plate and a driving source for driving the slider to move. A clamping groove cooperating with the slider is provided on the outer ring of the sleeve.

5. A waste acid solution treatment device according to claim 4, characterized in that: A travel switch 1 and a travel switch 2 of different heights are arranged on the inner wall of the reactor. When the partition plate group moves downward and abuts against the travel switch 1, the travel switch 1 is triggered, and the stirring shaft reverses at this time. When the partition plate group moves upward to trigger the travel switch 2, the partition plate group stops moving.

6. The waste acid solution treatment device according to claim 1, characterized in that: The partition plate 1 is provided with a driving source 2 for driving the partition plate 2 and expanding the partition plate 1.

7. The waste acid solution treatment device according to claim 1, characterized in that: The outer circumferential surfaces of the partition plate 1 and the partition plate 2 are both provided with sealing strips that abut against the inner wall of the reaction kettle.

8. The waste acid solution treatment device according to claim 1, characterized in that: A liquid outlet pipe connected to the valve liquid outlet is arranged above the valve, and a blade for stirring the liquid and a driving source for driving the liquid outlet pipe to rotate are arranged on the liquid outlet pipe, and a plurality of liquid spray holes connected to the liquid outlet pipe are opened on the blade.

9. A waste acid solution treatment device according to claim 8, characterized in that: The driving source three comprises a gear ring slidably mounted on the stirring shaft and a gear mounted on the liquid outlet pipe for meshing with the gear ring.

Images