Nitrification wastewater treatment device for nitrobenzene production line

Abstract

The invention discloses a nitration wastewater treatment device for a nitrobenzene production line, and belongs to the technical field of wastewater treatment. A nitration wastewater treatment device for a nitrobenzene production line comprises a treatment box with a feeding pipe and a discharging pipe and further comprises a storage box with a first material pipe arranged at the bottom, the storage box is fixedly installed on the treatment box, the lower end of the first material pipe extends into the treatment box, a liquid storage box is fixedly installed on the treatment box, and the lower end of the first material pipe extends into the liquid storage box. A second material pipe communicating with the treatment box is fixedly connected to the bottom of the liquid storage box, and a first light bar is fixedly mounted on the inner wall of the treatment box; the transverse shaft is transversely and rotationally connected to the inner wall of the treatment box, a stirring pipe is mounted on the outer wall of the transverse shaft, and a driving part for driving the transverse shaft to rotate in a reciprocating manner is arranged on the outer wall of the treatment box; the purification efficiency can be effectively improved, energy consumption can be effectively reduced, and due to the fact that other chemical agents are basically not needed to be added in the whole process, the environmental protection property is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly relates to a nitrification wastewater treatment device for a nitrobenzene production line. Background Art

[0002] A nitro toluene production line is a chemical production facility for producing nitro toluene, where nitrobenzene includes mono-nitrobenzene, mono-nitro toluene, and dinitro toluene (2,3-dinitro toluene, 2,4-dinitro toluene, 2,6-dinitro toluene), all of which are important intermediates for plastics, dyes, coatings, pharmaceuticals, pesticides, and fragrances, etc., and have a wide range of uses. In the production of nitro toluene, a large amount of nitrification wastewater will inevitably be generated, and these wastewaters are generally purified through precipitation, adsorption, or membrane separation technology, etc.

[0003] However, in the prior art, whether it is the precipitation method or the adsorption method, the efficiency of treating nitrification wastewater is limited, and a large amount of chemical agents may need to be added during the treatment process, which poses a high risk to environmental pollution. At the same time, the energy consumption during the treatment process is relatively large, such as the high cost of using membranes. Therefore, it is necessary to design a nitrification wastewater treatment device with high efficiency, high environmental protection, and low pollution risk. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of low efficiency and insufficient environmental protection in the prior art for treating nitrification wastewater, and to propose a nitrification wastewater treatment device for a nitrobenzene production line.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A nitrification wastewater treatment device for a nitrobenzene production line, including a treatment tank with a feed pipe and a discharge pipe, and further including: a storage tank with a first material pipe at the bottom, fixedly installed on the treatment tank, wherein the lower end of the first material pipe extends into the treatment tank, a liquid storage tank is fixedly installed on the treatment tank, the bottom of the liquid storage tank is fixedly connected with a second material pipe communicating with the treatment tank, and a first light strip is fixedly installed on the inner wall of the treatment tank; a horizontal shaft, horizontally rotatably connected to the inner wall of the treatment tank, wherein a stirring pipe is installed on the outer wall of the horizontal shaft, and a driving part for driving the horizontal shaft to rotate reciprocally is provided on the outer wall of the treatment tank.

[0006] To make the stirring pipe swing reciprocally in the treatment tank, preferably, the driving part includes a driving motor fixedly installed on the outer wall of the treatment tank, a reciprocating lead screw is fixedly installed on the output shaft of the driving motor, wherein a slide table that is threadedly connected to the outer wall of the reciprocating lead screw and slidably connected to the outer wall of the treatment tank is provided, a rack is fixedly installed on the slide table, and a driven gear that is meshed with the rack is fixedly installed at one end of the horizontal shaft.

[0007] In order to improve the purification efficiency of wastewater, further, a device hole is provided at the end of the horizontal axis, the stirring tube is rotatably connected to the horizontal axis, and one end of the stirring tube extends into the device hole. The open end of the horizontal axis is rotatably connected with an end cover, the end of the second material tube extends into the end cover, and a spray head and a second light strip are fixedly installed on the outer wall of the stirring tube.

[0008] In order to make the stirring tube rotate back and forth and rotate itself, further, an inner shaft extending into the device hole is fixedly connected in the treatment tank, a fixed gear is fixedly installed on the outer wall of the inner shaft, and a passive gear meshing with the fixed gear is fixedly installed on the outer wall of the stirring tube.

[0009] In order to clean the dirt on the outer wall of the second light strip, further, a vertical rod is arranged on the outer wall of the horizontal axis, a first scraping plate fitting the outer wall of the stirring tube is fixedly installed on the outer wall of the vertical rod, a plurality of branch rods arranged at equal intervals are fixedly connected to the outer wall of the vertical rod, and a reciprocating part for driving the vertical rod to slide back and forth is arranged on the stirring tube.

[0010] In order to make the first scraping plate approach the stirring tube intermittently, further, a strip-shaped groove is arranged on the outer wall of the horizontal axis, a slider is slidably installed in the strip-shaped groove, a spring is installed between the slider and the inner wall of the strip-shaped groove. Among them, an arc-shaped plate covering the upper port of the strip-shaped groove is fixedly connected to the slider, and a convex block is fixedly connected to the outer wall of the stirring tube. When the stirring tube rotates, the convex block intermittently presses the arc-shaped plate.

[0011] In order to enable the first scraping plate to be rinsed by the spray head, further, the spray head is vertically arranged with respect to the orientation of the second light strip, and the convex block has the same orientation as the spray head.

[0012] In order to clean part of the dirt on the first light strip, further, the end of the vertical rod is fixedly connected with a second scraping plate, and the second scraping plate fits on the inner wall of the treatment tank.

[0013] In order to aerate the mixed liquid, further, a telescopic air bag is installed between the sliding table and the bottom of the liquid storage tank. An air suction pipe and an exhaust pipe communicated with the telescopic air bag are fixedly connected to the telescopic air bag. The end of the exhaust pipe extends into the end cover, and a one-way valve is fixedly installed in the second material tube.

[0014] In order to facilitate the temporary storage of nitrification wastewater, preferably, a temporary storage bucket is fixedly installed on the top of the treatment tank. The upper end of the feed pipe extends to the inner bottom of the temporary storage bucket, and a valve is fixedly installed on the feed pipe.

[0015] Compared with the prior art, the present invention provides a nitrification wastewater treatment device for a nitrobenzene production line, which has the following beneficial effects: 1. The nitrification wastewater treatment device for the nitrobenzene production line irradiates the liquid in the treatment tank through the first light strip. The nitrification wastewater is purified under the action of the solution, catalyst, and light. The purification principle refers to the solution phosgene method, which can effectively improve the purification efficiency and reduce energy consumption. Since basically no other chemical agents need to be added during the whole process, the environmental protection performance is higher.

[0016] 2. The nitrification wastewater treatment device for the nitrobenzene production line drives the reciprocating lead screw to rotate through the drive motor, and the horizontal axis drives the stirring pipe to swing reciprocally in the treatment tank, so as to stir the mixed liquid in the treatment tank and improve the treatment efficiency of the nitrification wastewater.

[0017] 3. The nitrification wastewater treatment device for the nitrobenzene production line makes the second light strip swing reciprocally in the treatment tank through the reciprocally swinging stirring pipe, which can further improve the irradiation effect on the mixed liquid and significantly improve the purification efficiency of the nitrification wastewater.

[0018] 4. The nitrification wastewater treatment device for the nitrobenzene production line makes the stirring pipe swing reciprocally in the treatment tank, so that the solution can be more efficiently mixed into the nitrification wastewater, further improving the purification efficiency of the nitrification wastewater. And the reciprocally swinging stirring pipe makes the internal solution spray out from the nozzle under the action of centrifugal force, thereby improving the efficiency of the solution discharged into the nitrification wastewater.

[0019] 5. The nitrification wastewater treatment device for the nitrobenzene production line drives the passive gear to roll reciprocally on the fixed gear through the stirring pipe, which can drive the nozzle and the second light strip on the outer wall to revolve reciprocally around the axis of the stirring pipe, thus significantly increasing the irradiation area of the second light strip and the spraying area of the nozzle at the same time, making the solution mix with the nitrification wastewater more efficiently and significantly improving the treatment efficiency of the nitrification wastewater.

[0020] 6. The nitrification wastewater treatment device for the nitrobenzene production line scrapes the surface of the stirring pipe reciprocally through the first scraper, which can clean the impurities adhering to the outer wall of the second light strip, making the second light strip have good irradiation performance, and thus maintaining the effect of purifying the nitrification wastewater. Description of the Drawings

[0021] Figure 1 It is the first perspective axonometric structure schematic diagram of a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention; Figure 2 It is the second perspective axonometric structure schematic diagram of a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention; Figure 3 It is the sectional structure schematic diagram of the treatment tank of a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention; Figure 4Partial sectional structure schematic diagram of a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention; Figure 5 Axonometric structure schematic diagram of a liquid storage tank of a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention; Figure 6 Horizontal sectional structure schematic diagram of a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention; Figure 7 Axonometric structure schematic diagram of a stirring pipe of a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention; Figure 8 For a nitrification wastewater treatment device for a nitrobenzene production line proposed by the present invention Figure 6 Schematic diagram of part A structure.

[0022] In the figure: 1, treatment tank; 2, feed pipe; 3, first light bar; 4, storage tank; 5, first material pipe; 6, liquid storage tank; 7, second material pipe; 8, horizontal axis; 9, stirring pipe; 10, second light bar; 11, driving motor; 12, reciprocating lead screw; 13, sliding table; 14, rack; 15, driven gear; 16, passive gear; 17, inner shaft; 18, fixed gear; 19, vertical rod; 20, first scraper; 21, strip groove; 22, slider; 23, spring; 24, arc plate; 25, convex block; 26, branch rod; 27, end cover; 28, nozzle; 29, device hole; 30, telescopic airbag; 31, exhaust pipe; 32, suction pipe; 33, second scraper; 34, temporary storage bucket. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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.

[0025] Example 1: Refer to Figures 1-8, A nitrification wastewater treatment device for a nitrobenzene production line, including a treatment tank 1 with a feed pipe 2 and a discharge pipe. Valves are installed on both the feed pipe 2 and the discharge pipe. It also includes: A storage tank 4 with a first material pipe 5 at the bottom, fixedly installed on the treatment tank 1. The storage tank 4 is used to store a solution, which can be hydrogen peroxide or phosphoric acid. Among them, the lower end of the first material pipe 5 extends into the treatment tank 1. A liquid storage tank 6 is fixedly installed on the treatment tank 1. The liquid storage tank 6 is used to store a catalyst, which can be a metal-free powder catalyst or a metal oxide semiconductor material. The bottom of the liquid storage tank 6 is fixedly connected to a second material pipe 7 communicating with the treatment tank 1. A valve is also installed on the second material pipe 7. A first lamp strip 3 is fixedly installed on the inner wall of the treatment tank 1. The first lamp strip 3 is an ultraviolet lamp or a visible light lamp; A horizontal shaft 8, horizontally rotatably connected to the inner wall of the treatment tank 1. Among them, a stirring pipe 9 is installed on the outer wall of the horizontal shaft 8. A driving part for driving the horizontal shaft 8 to reciprocate and rotate is provided on the outer wall of the treatment tank 1.

[0026] Specifically, during use, the wastewater to be treated is injected into the treatment tank 1 through the feed pipe 2. Then, the electromagnetic valves in the second material pipe 7 and the first material pipe 5 are opened. At this time, the solution in the liquid storage tank 6 will enter the treatment tank 1 through the second material pipe 7, and the catalyst in the storage tank 4 will enter the treatment tank 1 through the first material pipe 5. At the same time, the driving motor 11 and the first lamp strip 3 are started. The first lamp strip 3 will irradiate the liquid in the treatment tank 1. The nitrification wastewater will be purified under the action of the solution, the catalyst, and light. The purification principle refers to the solution phosgene method, which can effectively improve the purification efficiency and reduce energy consumption. Since basically no other chemical agents need to be added during the whole process, the environmental protection performance is higher. During this period, the driving part will drive the horizontal shaft 8 to reciprocate and rotate forward and backward in the treatment tank 1, and the horizontal shaft 8 will drive the stirring pipe 9 to swing back and forth in the treatment tank 1, so as to stir the mixed liquid in the treatment tank 1 and improve the treatment efficiency of the nitrification wastewater.

[0027] A temporary storage bucket 34 is fixedly installed on the top of the above-mentioned treatment tank 1. The upper end of the feed pipe 2 extends to the inner bottom of the temporary storage bucket 34, and a valve is fixedly installed on the feed pipe 2; The temporary storage bucket 34 is used to temporarily store the nitrification wastewater generated by the dinitrotoluene production line. When it is necessary to make the nitrification wastewater enter the treatment tank 1, just open the valve on the feed pipe 2. In order to improve the speed of the wastewater entering the treatment tank 1, in practice, a breather pipe for exhaust and suction can be installed on the top of the treatment tank 1.

[0028] Among them, the solution phosgene method is a new environmental protection technology for treating wastewater and waste gas through photochemical reactions. It mainly utilizes the characteristics of chemical substances reacting under light to convert harmful substances into harmless substances, thereby achieving the purpose of purifying the environment. The principle of this technology is to dissolve the wastewater or waste gas to be treated in a specific solution, and then add a photocatalyst under light to trigger a chemical reaction. This photocatalyst can absorb light energy and generate active free radicals, which in turn initiate oxidation, reduction and other reactions, decomposing pollutants such as organic matter and heavy metals in the wastewater into harmless substances or converting them into recyclable products; compared with traditional wastewater treatment technologies, the solution phosgene method has the advantages of not producing secondary pollution, fast reaction speed, good treatment effect, etc. At the same time, this technology can also convert harmful substances in organic waste gas into carbon dioxide and water, reducing air pollution.

[0029] Example Two: Refer to Figure 1 、 Figure 4 and Figure 5 , which is basically the same as Example One. Furthermore, the specific implementation scheme of the driving part is specifically disclosed.

[0030] The above-mentioned driving part includes a driving motor 11 fixedly installed on the outer wall of the treatment tank 1. A reciprocating lead screw 12 is fixedly installed on the output shaft of the driving motor 11. Among them, a slide table 13 that is threadedly connected to the outer wall of the reciprocating lead screw 12 and slidably connected to the outer wall of the treatment tank 1 is provided. A rack 14 is fixedly installed on the slide table 13. One end of a cross shaft 8 is fixedly installed with a driven gear 15 that meshes with the rack 14.

[0031] Specifically, during the operation of the driving motor 11, the driving motor 11 will drive the reciprocating lead screw 12 to rotate. The reciprocating lead screw 12 will drive the slide table 13 to reciprocate along the outer wall of the treatment tank 1, thereby driving the rack 14 to reciprocate. The rack 14 will drive the driven gear 15 to reciprocate forward and backward. The driven gear 15 will drive the cross shaft 8 to reciprocate forward and backward in the treatment tank 1. The cross shaft 8 will drive the stirring tube 9 to reciprocate in the treatment tank 1, so as to stir the mixed liquid in the treatment tank 1 and improve the treatment efficiency of nitrification wastewater.

[0032] Example Three: Refer to Figures 4-8 , which is basically the same as Example Two. Furthermore, the specific implementation scheme for improving the wastewater treatment efficiency is specifically added.

[0033] A device hole 29 is provided at the end of the horizontal shaft 8. The stirring tube 9 is rotatably connected to the horizontal shaft 8, and one end of the stirring tube 9 extends into the device hole 29. The open end of the horizontal shaft 8 is rotatably connected with an end cover 27. The end of the second material pipe 7 extends into the end cover 27. A spray head 28 and a second light bar 10 are fixedly installed on the outer wall of the stirring tube 9. The second light bar 10 has the same function as the first light bar 3.

[0034] Specifically, since the second light bar 10 is installed on the outer wall of the stirring tube 9, the reciprocally swinging stirring tube 9 will cause the second light bar 10 to reciprocally swing in the treatment tank 1, which can further improve the irradiation effect on the mixed liquid and significantly improve the purification efficiency of the nitrification wastewater.

[0035] When the solution is discharged from the second material pipe 7, the solution will enter the device hole 29 from the end cover 27, then enter the stirring tube 9 from the device hole 29, and finally be sprayed into the treatment tank 1 from the spray head 28 on the outer wall of the stirring tube 9. Since the stirring tube 9 will reciprocally swing in the treatment tank 1, the solution can be more efficiently mixed into the nitrification wastewater, further improving the purification efficiency of the nitrification wastewater. And the reciprocally swinging stirring tube 9 will cause the internal solution to be ejected from the spray head 28 under the action of centrifugal force, thereby improving the efficiency of the solution discharged into the nitrification wastewater.

[0036] An inner shaft 17 extending into the device hole 29 is fixedly connected in the treatment tank 1. A fixed gear 18 is fixedly installed on the outer wall of the inner shaft 17. A driven gear 16 meshing with the fixed gear 18 is fixedly installed on the outer wall of the stirring tube 9.

[0037] Specifically, when the stirring tube 9 reciprocally swings, the stirring tube 9 will drive the driven gear 16 to reciprocally roll on the fixed gear 18. The driven gear 16 will drive the stirring tube 9 to reciprocally rotate, and then drive the spray head 28 and the second light bar 10 on the outer wall to reciprocally revolve around the axis of the stirring tube 9, thereby significantly increasing the irradiation area of the second light bar 10 and at the same time increasing the spraying area of the spray head 28, making the solution mix with the nitrification wastewater more efficiently and significantly improving the treatment efficiency of the nitrification wastewater.

[0038] Example 4: Refer to Figures 4-8 , which is basically the same as Example 3. Further, a specific implementation scheme for improving the liquid mixing efficiency in the treatment tank 1 is specifically added.

[0039] A vertical rod 19 is provided on the outer wall of the above-mentioned horizontal axis 8. A first scraper 20 that fits against the outer wall of the stirring tube 9 is fixedly installed on the outer wall of the vertical rod 19. A plurality of branch rods 26 arranged at equal intervals are fixedly connected to the outer wall of the vertical rod 19. The number of branch rods 26 is 3 to 8. The preferred number in this application is 3. A reciprocating part for driving the vertical rod 19 to slide reciprocally is provided on the stirring tube 9. The reciprocating part includes a strip-shaped groove 21 provided on the outer wall of the horizontal axis 8. A slider 22 is slidably installed in the strip-shaped groove 21. A spring 23 is installed between the slider 22 and the inner wall of the strip-shaped groove 21. Among them, an arc-shaped plate 24 that covers the upper port of the strip-shaped groove 21 is fixedly connected to the slider 22. A convex block 25 is fixedly connected to the outer wall of the stirring tube 9. When the stirring tube 9 rotates, the convex block 25 intermittently presses against the arc-shaped plate 24.

[0040] Specifically, when the horizontal axis 8 reciprocally rotates, the horizontal axis 8 will also drive the vertical rod 19 and the branch rods 26 to reciprocally swing, so as to improve the stirring efficiency of the mixed liquid. When the stirring tube 9 reciprocally rotates on its own axis, the first scraper 20 will reciprocally scrape on the surface of the stirring tube 9, so that the impurities adhering to the outer wall of the second light bar 10 can be cleaned, enabling the second light bar 10 to have good irradiation performance, and further maintaining the effect of purifying nitrified wastewater.

[0041] The above-mentioned nozzle 28 is arranged perpendicular to the orientation of the second light bar 10, and the convex block 25 has the same orientation as the nozzle 28.

[0042] Specifically, during the reciprocal rotation of the stirring tube 9 on its own axis, the stirring tube 9 will also drive the convex block 25 to reciprocally swing. When the convex block 25 faces the arc-shaped plate 24, the arc-shaped plate 24 will be pressed by the convex block 25. The arc-shaped plate 24 will drive the slider 22 and the vertical rod 19 to translate in a direction away from the stirring tube 9. The vertical rod 19 will drive the first scraper 20 and the branch rods 26 to translate synchronously. On the one hand, it can make the branch rods 26 have a larger stirring range, thus improving the stirring efficiency of the nitrified wastewater. On the other hand, after the first scraper 20 passes over the second light bar 10, the first scraper 20 will move away from the outer wall of the stirring tube 9 under the action of the convex block 25, so that the cleaning surface of the first scraper 20 is exposed to the flowing mixed liquid in the treatment tank 1 and the spraying direction of the nozzle 28. The flowing mixed liquid in the treatment tank 1 and the solution sprayed by the nozzle 28 will wash the first scraper 20, enabling the first scraper 20 to maintain the effect of cleaning the second light bar 10, indirectly ensuring the treatment efficiency of the nitrified wastewater. When the convex block 25 moves away from the arc-shaped plate 24, the spring 23 will drive the slider 22, the vertical rod 19, the first scraper 20 and the branch rods 26 to slide back in the reverse direction. The first scraper 20 will clean the second light bar 10 again. Therefore, the reciprocally swinging convex block 25 will also drive the vertical rod 19, the first scraper 20 and the branch rods 26 to reciprocally swing, significantly improving the stirring effect of the vertical rod 19 and the branch rods 26 on the mixed liquid. The end of the above-mentioned vertical rod 19 is fixedly connected with a second scraper 33, and the second scraper 33 fits against the inner wall of the treatment tank 1.

[0043] Specifically, when the vertical rod 19 swings back and forth, the vertical rod 19 will also drive the second scraper 33 to scrape back and forth on the inner wall of the treatment tank 1, so that the dirt adhering to the first light strip 3 can be scraped off, improving the irradiation effect of the first light strip 3.

[0044] Embodiment 5: Refer to Figure 1 And Figure 5 , which is basically the same as Embodiment 4. Further, a specific implementation plan for aerating the wastewater is specifically added.

[0045] An expansion airbag 30 is installed between the sliding table 13 and the bottom of the liquid storage tank 6. An air suction pipe 32 and an exhaust pipe 31 communicated with the expansion airbag 30 are fixedly connected to the expansion airbag 30. Check valves are fixedly installed in both the air suction pipe 32 and the exhaust pipe 31. The end of the exhaust pipe 31 extends into the end cover 27, and a check valve is fixedly installed in the second material pipe 7.

[0046] Specifically, when the sliding table 13 slides up and down reciprocally, the sliding table 13 will also indirectly stretch and compress the expansion airbag 30. When the expansion airbag 30 is squeezed, the air inside will be transported into the end cover 27 through the exhaust pipe 31, so as to be mixed with the solution in the device hole 29, improving the pressure of the solution sprayed out from the nozzle 28. At the same time, the solution and the mixed liquid in the treatment tank 1 are aerated, significantly improving the purification efficiency of the nitrification wastewater. When the solution is no longer needed, the solenoid valve in the second material pipe 7 is closed, and the nozzle 28 will only spray air into the treatment tank 1 to maintain the aeration effect. When the expansion airbag 30 is stretched, the expansion airbag 30 will suck in external air through the air suction pipe 32.

[0047] When the nitrification wastewater treatment device for this nitrobenzene production line is in use, the wastewater to be treated is injected into the treatment tank 1 through the feed pipe 2. Then, the solenoid valves in the second material pipe 7 and the first material pipe 5 are opened. At this time, the solution in the liquid storage tank 6 will enter the treatment tank 1 through the second material pipe 7, and the catalyst in the storage tank 4 will enter the treatment tank 1 through the first material pipe 5. At the same time, the driving motor 11 and the first light strip 3 are started. The first light strip 3 will irradiate the liquid in the treatment tank 1, and the nitrification wastewater will be purified under the action of the solution, the catalyst and the light. The purification principle refers to the solution phosgene method, which can effectively improve the purification efficiency and reduce the energy consumption. Since basically no other chemical agents need to be added during the whole process, the environmental protection performance is higher.

[0048] During the operation of the drive motor 11, the drive motor 11 drives the reciprocating lead screw 12 to rotate. The reciprocating lead screw 12 drives the slide table 13 to reciprocate along the outer wall of the processing tank 1, thereby driving the rack 14 to reciprocate. The rack 14 drives the driven gear 15 to reciprocate forward and backward. The driven gear 15 drives the cross shaft 8 to reciprocate forward and backward in the processing tank 1. The cross shaft 8 drives the stirring pipe 9 to reciprocate and swing in the processing tank 1, so as to stir the mixed liquid in the processing tank 1, improving the treatment efficiency of nitrification wastewater. Since the second lamp strip 10 is installed on the outer wall of the stirring pipe 9, the reciprocating and swinging stirring pipe 9 makes the second lamp strip 10 reciprocate and swing in the processing tank 1, further improving the irradiation effect on the mixed liquid and significantly enhancing the purification efficiency of nitrification wastewater.

[0049] When the second material pipe 7 discharges the solution, the solution enters the device hole 29 from the end cover 27, then enters the stirring pipe 9 from the device hole 29, and finally sprays into the processing tank 1 from the spray head 28 on the outer wall of the stirring pipe 9. Since the stirring pipe 9 reciprocates and swings in the processing tank 1, the solution can be more efficiently mixed into the nitrification wastewater, further improving the purification efficiency of nitrification wastewater. Moreover, the reciprocating and swinging stirring pipe 9 causes the internal solution to spray out from the spray head 28 under the action of centrifugal force, thereby improving the efficiency of the solution discharging into the nitrification wastewater.

[0050] When the stirring pipe 9 reciprocates and swings, the stirring pipe 9 drives the passive gear 16 to roll reciprocally on the fixed gear 18. The passive gear 16 drives the stirring pipe 9 to reciprocally rotate, and then drives the spray head 28 and the second lamp strip 10 on the outer wall to revolve reciprocally around the axis of the stirring pipe 9, significantly increasing the irradiation area of the second lamp strip 10 and the spraying area of the spray head 28 at the same time, making the solution mix with the nitrification wastewater more efficiently and significantly improving the treatment efficiency of nitrification wastewater.

[0051] When the cross shaft 8 reciprocates, the cross shaft 8 also drives the vertical rod 19 and the branch rod 26 to reciprocate and swing to improve the stirring efficiency of the mixed liquid. When the stirring pipe 9 reciprocally rotates, the first scraper 20 reciprocally scrapes on the surface of the stirring pipe 9, thereby cleaning the impurities adhering to the outer wall of the second lamp strip 10, enabling the second lamp strip 10 to have good irradiation performance, and then maintaining the effect of purifying nitrification wastewater.

[0052] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A nitrification wastewater treatment device for a nitrobenzene production line, comprising a treatment tank (1) with a feed pipe (2) and a discharge pipe, characterized in that, Further included are: A storage box (4) with a first material pipe (5) provided at the bottom, which is fixedly installed on the processing box (1). Among them, the lower end of the first material pipe (5) extends into the processing box (1), a liquid storage box (6) is fixedly installed on the processing box (1), the bottom of the liquid storage box (6) is fixedly connected to a second material pipe (7) communicating with the processing box (1), and a first light bar (3) is fixedly installed on the inner wall of the processing box (1). A horizontal shaft (8), which is horizontally rotatably connected to the inner wall of the processing box (1). Among them, a stirring pipe (9) is installed on the outer wall of the horizontal shaft (8), and a driving part for driving the horizontal shaft (8) to rotate reciprocally is provided on the outer wall of the processing box (1).

2. The nitrification wastewater treatment device for a nitrobenzene production line according to claim 1, wherein The driving part includes a driving motor (11) fixedly installed on the outer wall of the processing box (1), and a reciprocating lead screw (12) is fixedly installed on the output shaft of the driving motor (11). Among them, a sliding table (13) that is threadedly connected to the outer wall of the reciprocating lead screw (12) and slidably connected to the outer wall of the processing box (1) is provided, a rack (14) is fixedly installed on the sliding table (13), and a driven gear (15) that is meshed with the rack (14) is fixedly installed at one end of the horizontal shaft (8).

3. The nitrification wastewater treatment device for a nitrobenzene production line according to claim 2, characterized in that, A device hole (29) is provided at the shaft end of the horizontal shaft (8), the stirring pipe (9) is rotatably connected to the horizontal shaft (8), and one end of the stirring pipe (9) extends into the device hole (29). An end cover (27) is rotatably connected to the open end of the horizontal shaft (8), the end of the second material pipe (7) extends into the end cover (27), and a spray head (28) and a second light bar (10) are fixedly installed on the outer wall of the stirring pipe (9).

4. A nitrification wastewater treatment device for a nitrobenzene production line according to claim 3, characterized in that, An inner shaft (17) extending into the device hole (29) is fixedly connected in the processing box (1), a fixed gear (18) is fixedly installed on the outer wall of the inner shaft (17), and a passive gear (16) that is meshed with the fixed gear (18) is fixedly installed on the outer wall of the stirring pipe (9).

5. The nitrification wastewater treatment device for a nitrobenzene production line according to claim 4, wherein, A vertical rod (19) is provided on the outer wall of the horizontal shaft (8), a first scraping plate (20) that fits against the outer wall of the stirring pipe (9) is fixedly installed on the outer wall of the vertical rod (19), a plurality of branch rods (26) arranged at equal intervals are fixedly connected to the outer wall of the vertical rod (19), and a reciprocating part for driving the vertical rod (19) to slide reciprocally is provided on the stirring pipe (9).

6. The nitrification wastewater treatment device for a nitrobenzene production line according to claim 5, characterized in that, The reciprocating part includes a strip-shaped groove (21) provided on the outer wall of the horizontal shaft (8), a slider (22) is slidably installed in the strip-shaped groove (21), and a spring (23) is installed between the slider (22) and the inner wall of the strip-shaped groove (21). Among them, an arc-shaped plate (24) covering the upper port of the strip-shaped groove (21) is fixedly connected to the slider (22), a convex block (25) is fixedly connected to the outer wall of the stirring pipe (9), and when the stirring pipe (9) rotates, the convex block (25) intermittently presses against the arc-shaped plate (24).

7. A nitrification wastewater treatment device for a nitrobenzene production line according to claim 6, characterized in that, The spray head (28) and the second light bar (10) are arranged perpendicular to each other, and the convex block (25) has the same orientation as the spray head (28).

8. A nitration wastewater treatment device for a nitrobenzene production line according to claim 5, characterized in that, A second scraper (33) is fixedly connected to the end of the vertical rod (19), and the second scraper (33) is attached to the inner wall of the processing tank (1).

9. The nitrification wastewater treatment device for a nitrobenzene production line according to claim 4, characterized in that, A telescopic airbag (30) is installed between the sliding table (13) and the bottom of the liquid storage tank (6). An air suction pipe (32) and an exhaust pipe (31) that communicate with the telescopic airbag (30) are fixedly connected to the telescopic airbag (30). The end of the exhaust pipe (31) extends into the end cover (27), and a one-way valve is fixedly installed in the second material pipe (7).

10. A nitrification wastewater treatment device for a nitrobenzene production line according to claim 1, characterized in that, A temporary storage bucket (34) is fixedly installed on the top of the processing tank (1). The upper end of the feed pipe (2) extends to the inner bottom of the temporary storage bucket (34), and a valve is fixedly installed on the feed pipe (2).

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