Reaction waste liquid sterilization type treatment equipment for naphthalene sulfonic acid production

Abstract

The invention discloses reaction waste liquid sterilization type treatment equipment for naphthalene sulfonic acid production, and belongs to the technical field of naphthalene sulfonic acid reaction liquid treatment. The reaction waste liquid sterilization type treatment equipment for naphthalene sulfonic acid production comprises a multi-stage sterilization cabin, the multi-stage sterilization cabin comprises a microwave cabin, a second buffer box and an ultraviolet cabin, microwave heating, ozone oxidation and ultraviolet sterilization are sequentially completed, a pretreatment box is arranged at an inlet of the microwave cabin, and an arc-shaped screen and an overturning plate are arranged in the pretreatment box. According to the reaction waste liquid sterilization type treatment equipment for naphthalene sulfonic acid production, microwave-ozone-ultraviolet three-stage synergistic sterilization is adopted, the sterilization efficiency is high, the sterilization efficiency is far better than the single technical effect, the overturning plate is in linkage with the cleaning brush and the spiral conveying rod, impurities on the screen are removed in real time, blockage is avoided, the supporting spring structure of the annular brush enhances the cleaning flexibility, and the cleaning effect is good. The temperature of the ozone sterilization section is accurately controlled by the heat exchanger, so that the ozone decomposition failure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of naphthalenesulfonic acid reaction liquid treatment, in particular to sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production. Background Art

[0002] The reaction waste liquid generated during the production of naphthalenesulfonic acid contains high concentrations of organic matter, acidic components and microbial contaminants. Traditional treatment methods (such as chemical neutralization and biodegradation) have the risk of incomplete sterilization, low reaction efficiency or secondary pollution. In the prior art, microwave and ultraviolet sterilization equipment usually operate independently and fail to work together effectively. In addition, the pretreatment link is prone to system shutdown due to clogging of suspended matter. In addition, the connection between ozone oxidation and ultraviolet sterilization lacks temperature control, resulting in unstable oxidation efficiency. Therefore, there is an urgent need for an integrated and automated waste liquid treatment equipment to achieve efficient sterilization, organic matter degradation and continuous operation. Summary of the Invention

[0003] The object of the present invention is to provide a sterilization treatment device for reaction waste liquid in naphthalenesulfonic acid production, thereby solving the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a sterilization treatment device for reaction waste liquid in naphthalenesulfonic acid production, comprising a multi-stage sterilization chamber, wherein the multi-stage sterilization chamber comprises a microwave chamber, a second buffer chamber and a UV chamber, which sequentially complete microwave heating, ozone oxidation and UV sterilization; a pretreatment box is provided at the entrance of the microwave chamber, wherein an arc-shaped screen and a flip plate are provided in the pretreatment box; a collection barrel is provided on the outside of the pretreatment box, wherein a spiral conveying rod is provided in the collection barrel; the spiral conveying rod and the flip plate are linked by a belt to realize automatic slag cleaning; the output end of the UV chamber is connected to an oxidation reaction tower, which is used to receive the liquid output from the UV chamber and degrade organic matter in stages.

[0005] Preferably, the end of the flip plate is connected to a cleaning brush, and the cleaning brush fits against the concave surface of the arc-shaped screen.

[0006] Preferably, the microwave cabin includes a resonant cavity, a serpentine quartz glass tube, a microwave input component and a safety protective cover. The serpentine quartz glass tube is arranged in the resonant cavity, the microwave input component is arranged on the top of the resonant cavity, and the outer cover of the resonant cavity and the microwave input component is provided with a safety protective cover, which is made of copper mesh.

[0007] Preferably, the microwave input component includes a microwave magnetron, a waveguide tube and a stirrer. The waveguide tube is connected to the microwave cabin. The waveguide tube transmits microwaves from the microwave magnetron to the resonant cavity to reduce energy loss. The stirrer is distributed at the four corners of the resonant cavity to make the microwaves evenly distributed in the resonant cavity and avoid hot spots.

[0008] Preferably, a first buffer tank is provided at the bottom of the pretreatment tank, an acid-resistant booster pump is provided in the first buffer tank, and the output end of the acid-resistant booster pump is connected to the inlet of the serpentine quartz glass tube.

[0009] Preferably, an aeration pipe and a heat exchanger are provided in the second buffer tank, the heat medium inlet of the heat exchanger is connected to the outlet of the serpentine quartz glass tube, the heat medium outlet of the heat exchanger is connected to the second buffer tank, and the aeration pipe is placed above the heat exchanger.

[0010] Preferably, vertically distributed ultraviolet sterilization lamps are provided in the ultraviolet chamber, a partition is sleeved on the ultraviolet sterilization lamp, and a lead screw for driving the partition to move up and down is provided on one side of the ultraviolet chamber.

[0011] Preferably, the ultraviolet sterilization lamp is externally sheathed with a quartz sleeve, both ends of the quartz sleeve are sealedly connected to the upper and lower side walls of the ultraviolet chamber, and the quartz sleeve passes through the partition.

[0012] Preferably, a mounting hole is provided on the partition, an annular brush is provided in the mounting hole, and the annular brush is sleeved with the quartz sleeve.

[0013] Preferably, the outer ring of the annular brush is provided with a double-conical structure, support springs are provided at equal distances on the side walls of the double-conical structure, a deepening structure is provided in the middle position of the mounting hole, the deepening structure is sleeved with the double-conical structure, and the support spring is fixedly connected to the side wall of the deepening structure, which is adapted to the deformation cleaning requirements of the quartz sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The sterilization treatment equipment for reaction waste liquid used in naphthalenesulfonic acid production adopts microwave-ozone-UV three-stage synergistic sterilization, with high sterilization efficiency, far exceeding the effect of a single technology. The flip plate is linked to the cleaning brush and spiral conveyor rod to remove impurities from the screen in real time to avoid clogging. The supporting spring structure of the annular brush enhances cleaning flexibility, protects the quartz sleeve and improves durability. The heat exchanger accurately controls the temperature of the ozone sterilization section to avoid ozone decomposition failure, while reducing the temperature of the waste liquid entering the UV chamber to avoid damage to the UV sterilization lamp. The pretreatment, sterilization and oxidation segmented design facilitates maintenance and expansion, and is suitable for wastewater treatment of different scales. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall structural diagram of the sterilization treatment equipment for reaction waste liquid used in naphthalenesulfonic acid production according to the present invention;

[0017] Figure 2 This is a diagram showing the internal structure of the multi-stage sterilization cabin of the present invention;

[0018] Figure 3 This is a front view of the multi-stage sterilization cabin of the present invention;

[0019] Figure 4 This is a diagram of the internal structure of the UV cabin of the present invention;

[0020] Figure 5 This is a structural diagram of the partition of the present invention;

[0021] Figure 6 This is a structural diagram of the annular brush installation of the present invention.

[0022] In the figure: 1, pretreatment box; 11, curved screen; 12, flip plate; 121, cleaning brush; 13, liquid inlet; 14, collecting cylinder; 141, screw conveying rod; 15, first buffer box; 16, acid-resistant booster pump; 2, microwave chamber; 21, resonant cavity; 22, serpentine quartz glass tube; 23, microwave input assembly; 231, microwave magnetron; 232, waveguide; 233, stirrer; 24, Full protective cover; 3. Second buffer tank; 31. Aeration tube; 32. Heat exchanger; 4. UV chamber; 41. UV sterilization lamp; 411. Quartz sleeve; 42. Liquid outlet pipe; 43. Partition; 431. Mounting hole; 4311. Deepened structure; 432. Annular brush; 4321. Double cone structure; 4322. Support spring; 433. Slide; 44. Slide bar; 45. Screw; 5. Oxidation reaction tower. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In order to solve the problems of incomplete sterilization, low reaction efficiency or secondary contamination risk in traditional treatment methods, please refer to Figures 1-6 , this embodiment provides the following technical solutions:

[0025] The sterilization treatment equipment for reaction waste liquid from naphthalenesulfonic acid production includes a pretreatment box 1, a multi-stage sterilization chamber, and an oxidation reaction tower 5. After the pretreatment box 1 filters the reaction waste liquid from naphthalenesulfonic acid production, the multi-stage sterilization chamber is used to perform at least three-stage sterilization treatment on the reaction waste liquid from naphthalenesulfonic acid production. The sterilized reaction waste liquid from naphthalenesulfonic acid production is then passed into the oxidation reaction tower 5 to degrade organic matter in stages and destroy residual sulfonic acid groups, thereby achieving harmless treatment.

[0026] Specifically, an arc-shaped screen 11 is provided in the pretreatment box 1 for removing suspended particles, and a flip plate 12 is provided above the arc-shaped screen 11. Both ends of the flip plate 12 are movably connected to the inner wall of the pretreatment box 1 through bearings. A liquid inlet 13 is provided at the upper end of the pretreatment box 1. The naphthalenesulfonic acid reaction waste liquid falling from the liquid inlet 13 impacts the flip plate 12, driving the flip plate 12 to rotate. A cleaning brush 121 is provided at the end of the flip plate 12, and the cleaning brush 121 cleans the impurities on the arc-shaped screen 11. A cleaning brush 121 is provided on one side of the pretreatment box 1. The impurities collecting barrel 14 is connected to the pretreatment box 1. When the cleaning brush 121 moves to the connection point between the impurities collecting barrel 14 and the pretreatment box 1, the impurities are swept into the impurities collecting barrel 14. A spiral conveying rod 141 is provided in the impurities collecting barrel 14. One end of the spiral conveying rod 141 is connected to the flip plate 12 through a belt. When the flip plate 12 rotates, the spiral conveying rod 141 is driven synchronously to work, and the impurities are continuously output from the impurities collecting barrel 14, and the surface of the arc screen 11 is automatically cleaned to prevent the surface of the arc screen 11 from being blocked, thereby ensuring the continuous screening ability of the arc screen 11.

[0027] More specifically, the naphthalenesulfonic acid reaction waste liquid falling to the bottom of the pretreatment tank 1 flows into the first buffer tank 15 to buffer the flow. The first buffer tank 15 is provided with an acid-resistant booster pump 16, which pumps the naphthalenesulfonic acid reaction waste liquid in the first buffer tank 15 to the multi-stage sterilization chamber for sterilization treatment.

[0028] In this embodiment, the multi-stage sterilization chamber includes a microwave chamber 2, a second buffer box 3 and a UV chamber 4, wherein an aeration pipe 31 is provided in the second buffer box 3 to input ozone into the naphthalenesulfonic acid reaction waste liquid for sterilization.

[0029] Specifically, the microwave chamber 2 includes a resonant cavity 21, a serpentine quartz glass tube 22, a microwave input component 23, and a safety shield 24. The resonant cavity 21 is provided with a serpentine quartz glass tube 22. One end of the serpentine quartz glass tube 22 is connected to the output end of the acid-resistant booster pump 16, and the other end of the serpentine quartz glass tube 22 is connected to the second buffer tank 3. The top of the resonant cavity 21 is provided with a microwave input component 23. The resonant cavity 21 and the microwave input component 23 are covered with a safety shield 24. The safety shield 24 is made of copper mesh, which covers the resonant cavity 21. The microwave leakage is less than 5mW / cm 2 The resonant cavity 21 is a stainless steel sealed cabin with polished inner wall to enhance microwave reflection.

[0030] More specifically, the microwave input component 23 includes a microwave magnetron 231, a waveguide tube 232 and a stirrer 233. The waveguide tube 232 is connected to the microwave chamber 2. When the microwave magnetron 231 is driven by a high-voltage power supply, the electrons in the magnetic field perform spiral motion, exciting 2450MHz microwaves. The microwaves are transmitted to the resonant cavity 21 through the waveguide tube 232 and couple with the polar molecules in the wastewater. The waveguide tube 232 transmits the microwaves from the microwave magnetron 231 to the resonant cavity 21 to reduce energy loss. The stirrer 233 is distributed at the four corners of the resonant cavity 21 to ensure that the microwaves are evenly distributed in the resonant cavity 21 to avoid hot spots. An infrared thermometer and a directional coupler are provided in the resonant cavity 21. The infrared thermometer monitors the waste liquid temperature in real time and controls the temperature at 80-100°C for high-temperature sterilization. The directional coupler detects the microwave reflection power and matches the impedance.

[0031] It should be noted that the serpentine quartz glass tube 22 is arranged horizontally, about 1 / 3 of the height from the bottom of the resonant cavity 21, and is in the main radiation area of the microwave magnetron 231. The waste liquid passes horizontally through the serpentine quartz glass tube 22, and the microwave magnetron 231 radiates microwaves from the top. A four-blade stirrer 233 is installed in the corner with a rotation speed of 10 rpm to uniformly distribute energy.

[0032] The naphthalenesulfonic acid production reaction waste liquid flowing out of the serpentine quartz glass tube 22 enters the second buffer tank 3. A heat exchanger 32 is provided at the bottom of the second buffer tank 3. After the high-temperature waste liquid is heated in the heat exchanger 32, it enters the second buffer tank 3. An aeration pipe 31 is provided at the upper position of the second buffer tank 3. The aeration pipe 31 releases ozone into the cooled waste liquid to oxidize part of the naphthalenesulfonic acid and reduce the load of subsequent ultraviolet sterilization.

[0033] The UV chamber 4 is vertically arranged above the second buffer box 3, and a liquid outlet is provided on one side of the upper end of the second buffer box 3, which is connected to the UV chamber 4. A vertically arrayed UV sterilization lamp 41 is provided in the UV chamber 4, and a liquid outlet pipe 42 connected to the oxidation reaction tower 5 is provided on the side of the UV chamber 4 close to the liquid outlet. A partition 43 is provided in the middle position of the UV chamber 4, and one end of the partition 43 close to the liquid outlet pipe 42 is in contact with the inner wall of the UV chamber 4, and a waste liquid flow channel is left between the other end of the partition 43 and the inner wall of the UV chamber 4. The waste liquid bends and rises in the UV chamber 4, extending its residence time in the UV chamber 4 and improving the sterilization effect of the UV sterilization lamp 41. In order to protect the UV sterilization lamp 41 from corrosion, a quartz sleeve 411 is provided on the outside of the UV sterilization lamp 41, and both ends of the quartz sleeve 411 are sealed with the upper and lower side walls of the UV chamber 4, and the quartz sleeve 411 passes through the partition 43.

[0034] Specifically, a mounting hole 431 is provided on the partition 43, and an annular brush 432 is provided in the mounting hole 431. The annular brush 432 is sleeved with the quartz sleeve 411. The annular brush 432 moves up and down with the partition 43 to clean the outer wall of the quartz sleeve 411 to prevent dirt from sticking to the surface of the quartz sleeve 411 and affecting the sterilization effect of the ultraviolet sterilization lamp 41. Slide grooves 433 are provided on both sides of the partition 43, and a slide bar 44 movably connected to the slide groove 433 is provided on the side wall of the ultraviolet chamber 4. Under the guidance of the slider 44, the partition 43 can only move vertically up and down. At the same time, a screw 45 is provided in the UV chamber 4 and passes through the partition 43. The screw 45 is engaged with the partition 43. A drive motor is provided at one end of the screw 45. The drive motor controls the rotation of the screw 45 to drive the partition 43 to move up and down. It should be understood that the screw 45 and the slider 44 are made of anti-corrosion materials. The inner wall of the UV chamber 4 is coated with a TiO2 nano-coating, which generates OH free radicals under ultraviolet light to enhance the degradation of organic matter.

[0035] In order to improve the cleaning effect of the quartz sleeve 411, the outer ring of the annular brush 432 is provided with a double-conical structure 4321, and support springs 4322 are provided at equal distances on the side walls of the double-conical structure 4321. A deepening structure 4311 is provided in the middle position of the mounting hole 431. The deepening structure 4311 is sleeved with the double-conical structure 4321, and the support spring 4322 is fixedly connected to the side wall of the deepening structure 4311. When encountering dirt that is difficult to clean on the quartz sleeve 411, the support spring 4322 will be squeezed by the annular brush 432 and deformed, thereby improving the flexibility of cleaning and avoiding damage to the quartz sleeve 411. When the partition 43 moves, the support spring 4322 will vibrate due to the resistance of the annular brush 432 and its own elastic force, thereby improving the cleaning effect of the annular brush 432.

[0036] Working process: Naphthalenesulfonic acid waste liquid enters the pretreatment box 1 from the liquid inlet 13, impacts the flip plate 12 to make it rotate, drives the cleaning brush 121 to clean the suspended particles on the arc screen 11, and the impurities are automatically discharged through the spiral conveying rod 141 of the collecting cylinder 14. The filtered waste liquid flows into the first buffer box 15 and is pumped into the microwave chamber 2 through the acid-resistant booster pump 16. The waste liquid flows through the serpentine quartz glass tube 22 and is irradiated by 2450MHz microwaves in the resonant cavity 21. The temperature rises to 80-100℃, killing microorganisms. The stirrer 233 ensures that the microwaves are evenly distributed and the high-temperature waste liquid After being cooled to below 40°C in the heat exchanger 32, it enters the second buffer tank 3. Ozone is added to the aeration pipe 31 to further oxidize organic matter and sterilize. The waste liquid bends and rises in the UV chamber 4. The UV sterilization lamp 41 radiates 254nm ultraviolet light, which combines with the OH free radicals generated by the TiO2 coating to completely kill residual pathogens. The annular brush 432 automatically cleans the quartz sleeve 411 to maintain light transmittance. The sterilized waste liquid enters the oxidation reaction tower 5, where ozone, persulfate and other oxidants are added in stages to degrade residual organic matter and destroy sulfonic acid groups, achieving harmless discharge.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0038] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A sterilization treatment device for reaction waste liquid in the production of naphthalenesulfonic acid, comprising a multi-stage sterilization chamber, characterized in that: The multi-stage sterilization chamber comprises a microwave chamber (2), a second buffer chamber (3) and an ultraviolet chamber (4), which sequentially complete microwave heating, ozone oxidation and ultraviolet sterilization. A pretreatment chamber (1) is provided at the entrance of the microwave chamber (2), wherein an arc-shaped screen (11) and a turnover plate (12) are provided in the pretreatment chamber (1), a collection barrel (14) is provided outside the pretreatment chamber (1), and a spiral conveying rod (141) is provided in the collection barrel (14), wherein the spiral conveying rod (141) and the turnover plate (12) are linked by a belt to realize automatic slag removal, and an output end of the ultraviolet chamber (4) is connected to an oxidation reaction tower (5).

2. The sterilization treatment equipment for reaction waste liquid used in naphthalenesulfonic acid production according to claim 1, wherein: The end of the flip plate (12) is connected to a cleaning brush (121), and the cleaning brush (121) is in contact with the concave surface of the arc-shaped screen (11).

3. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 2, wherein: The microwave chamber (2) comprises a resonant cavity (21), a serpentine quartz glass tube (22), a microwave input component (23) and a safety shield (24). The resonant cavity (21) is provided with a serpentine quartz glass tube (22), the top of the resonant cavity (21) is provided with a microwave input component (23), and the resonant cavity (21) and the microwave input component (23) are covered with a safety shield (24) made of a copper mesh.

4. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 3, wherein: The microwave input assembly (23) comprises a microwave magnetron (231), a waveguide tube (232) and a stirrer (233); the waveguide tube (232) is in communication with the microwave chamber (2); and the stirrer (233) is distributed at the four corners of the resonant cavity (21).

5. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 4, characterized in that: A first buffer box (15) is provided at the bottom of the pretreatment box (1), an acid-resistant booster pump (16) is provided in the first buffer box (15), and the output end of the acid-resistant booster pump (16) is connected to the inlet of the serpentine quartz glass tube (22).

6. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 5, characterized in that: The second buffer tank (3) is provided with an aeration pipe (31) and a heat exchanger (32). The heat medium inlet of the heat exchanger (32) is connected to the outlet of the serpentine quartz glass tube (22), and the heat medium outlet of the heat exchanger (32) is communicated with the second buffer tank (3).

7. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 1, characterized in that: Vertically distributed ultraviolet sterilization lamps (41) are arranged in the ultraviolet chamber (4), a partition (43) is sleeved on the ultraviolet sterilization lamp (41), and a lead screw (45) for driving the partition (43) to move up and down is arranged on one side of the ultraviolet chamber (4).

8. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 7, characterized in that: The ultraviolet sterilization lamp (41) is externally sheathed with a quartz sleeve (411), both ends of the quartz sleeve (411) are sealedly connected to the upper and lower side walls of the ultraviolet chamber (4), and the quartz sleeve (411) passes through the partition (43).

9. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 8, characterized in that: The partition (43) is provided with a mounting hole (431), an annular brush (432) is arranged in the mounting hole (431), and the annular brush (432) is sleeved with the quartz sleeve (411).

10. The sterilization treatment equipment for reaction waste liquid in naphthalenesulfonic acid production according to claim 9, characterized in that: The outer ring of the annular brush (432) is provided with a double-conical surface structure (4321), and support springs (4322) are provided at equal distances on the side walls of the double-conical surface structure (4321). A deepening structure (4311) is provided in the middle position of the mounting hole (431), and the deepening structure (4311) is sleeved with the double-conical surface structure (4321), and the support spring (4322) is fixedly connected to the side wall of the deepening structure (4311).

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