Device and method for treating high-concentration organic wastewater from production of tribasic acid rust inhibitor

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a high-concentration organic wastewater treatment device and a treatment method for tribasic acid rust inhibitor production. The device comprises a base plate, a driving motor is provided at the lower end of the base plate, an aeration pipe is rotatably installed at the upper end of the base plate, a horizontal exhaust hole is provided on the outer upper half of the aeration pipe, an inclined exhaust hole is provided on the outer lower half of the aeration pipe, a connecting shell is provided at the lower end of the aeration pipe, a one-way valve is provided at the upper end of the connecting shell, two groups of slide grooves are provided on the inner wall of the aeration pipe, a flow limiting component is provided for sliding inside the aeration pipe, the base plate is driven to rotate by the driving motor, so that the isolation plate and the flow groove form a timed air supply, and the shower-like spray of the aeration pipe is coordinated, the 30-degree inclined exhaust hole in the lower half is used to impact the deposited sludge on the bottom of the pool, the horizontal exhaust hole in the upper half is used to diffuse flocs, and at the same time, the flow limiting component is dynamically adjusted to form pulsed aeration, thereby improving the uniformity of dissolved oxygen and the sludge suspension rate.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a device and a method for treating high-concentration organic wastewater produced by the production of a tribasic acid rust inhibitor. Background Art

[0002] During the production process of tribasic acid rust inhibitors, a large amount of high-concentration organic wastewater is generated. This type of wastewater has the characteristics of complex composition, high organic matter content, and high toxicity, making it extremely difficult to treat. Traditional wastewater treatment methods, such as biological methods, are mature in technology and have stable treatment effects. However, for high-concentration organic wastewater produced by tribasic acid rust inhibitors, since it contains substances that inhibit the growth of microorganisms, it may lead to reduced microbial activity, thereby affecting the treatment effect. Some processes in physical and chemical methods, such as adsorption methods, can effectively remove some organic matter, but there are problems such as frequent replacement of adsorbents after saturation and high operating costs. The ozone oxidation method in the chemical oxidation method has the disadvantages of high ozone generation cost, low utilization rate, and low COD removal rate; the photochemical oxidation method faces the problems of high operating costs and small treatment volume; the activated sludge method, as an efficient aerobic biological treatment method for sewage, has been widely used worldwide since its invention in the early 20th century.

[0003] For example, the existing Chinese patent with publication number CN216918957U discloses a high-efficiency activated sludge method sewage treatment system. When in use, the sewage collected in the collection tank is initially filtered through the grid net and then enters several treatment chambers in the treatment tank. The motor drives the rotating rod to rotate, and the rotation of the rotating rod drives the fixedly connected first bevel gear to rotate. The first bevel gear drives the meshed second bevel gear to rotate, and the second bevel gear drives the stirring shaft to rotate, thereby achieving mixing and stirring of the internal sewage and sludge. The air compressor is used to supply air to the cavities in the stirring shaft and the stirring rod, and the air enters the treatment tank through the exhaust hole on the stirring rod. The input amount of the air compressor is controlled by the control device to prevent the activated sludge from expanding and entering the sedimentation tank in large quantities when the oxygen content is too high. The treated water is precipitated in the sedimentation tank and then enters the water storage tank for storage and recycling.

[0004] With respect to the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: in the prior art, the method of introducing gas into the aeration tank is to aerate from bottom to top. This method cannot fully suspend the sludge flocs and easily causes sludge deposition. On the one hand, the deposited sludge flocs are more easily broken by the impact of gas; on the other hand, the flocs accumulate at the bottom of the tank, occupying the growth space of microorganisms, affecting the full contact between microorganisms and pollutants in the sewage, and further affecting the formation of activated sludge flocs by microorganisms through adsorption and coagulation, which is not conducive to subsequent sedimentation and separation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology has the disadvantage that the deposited sludge flocs are easily broken by gas impact, and the flocs accumulate at the bottom of the pool, occupying the growth space of microorganisms and affecting the full contact between microorganisms and pollutants in the sewage. For this reason, we propose a high-concentration organic wastewater treatment device and treatment method for the production of tribasic acid rust inhibitors.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a high-concentration organic wastewater treatment device and treatment method for tribasic acid rust inhibitor production, comprising a regulating tank, a control reactor is provided on one side of the regulating tank, an aerobic reaction tank is provided at the output end of the control reactor, and a deep treatment tower is provided at the output end of the aerobic reaction tank 1. The wastewater produced by the tribasic acid rust inhibitor is collected in the regulating tank, and the pH value of the wastewater is adjusted to between 6 and 9 by stirring and adding reagents. The wastewater is then sent to an iron-carbon micro-electrolysis reactor for a reaction time of 1 to 2 hours, and then enters a Fenton oxidation device, and an appropriate amount of Fenton reagent reacts for 30 to 60 minutes to initially degrade and transform the organic matter in the wastewater. The pretreated wastewater enters the UASB reactor, and the temperature in the reactor is controlled at 35-38°C. The hydraulic retention time is 8 to 12 hours. Under the action of anaerobic microorganisms, most of the organic matter in the wastewater is decomposed into biogas and carbon dioxide, and the COD removal rate can reach 70% to 80%. The wastewater after anaerobic treatment enters the aerobic reaction tank. When using the activated sludge method, the sludge concentration is controlled at 3 to 5 g / L, and the aeration time is 8 to 12 hours, so that the organic matter in the wastewater is further decomposed by aerobic microorganisms.

[0007] Preferably, the aerobic reaction tank comprises a reaction shell 1, an aeration tank is provided inside the reaction shell 1, and a secondary sedimentation tank is provided inside the reaction shell 1.

[0008] Preferably, the aeration tank includes an aerator, model RB-52S-1 three-kilowatt double-impeller vortex air pump, the output end of the aerator is fixedly installed with a fixed shell, the upper end of the fixed shell is fixedly installed with a reaction shell 2, the upper end of the reaction shell 2 is provided with a circular groove, the side surface of the circular groove is fixedly installed with a planetary gear, the upper end of the reaction shell 2 is provided with a liquid inlet pipe, the lower end of the liquid inlet pipe is rotatably installed with a connecting disk, the connecting disk is located inside the reaction shell 2 and is rotatably connected thereto, the upper end of the connecting disk is provided with multiple sets of rotating gears, the rotating gears are meshed with the planetary gears, and the lower end of the rotating gear is penetrated by an aeration pipe. When the device needs to be used to degrade organic matter in wastewater, the waste liquid is discharged into the interior of the reaction shell 2 through the liquid inlet pipe, and oxygen is discharged into the interior of the reaction shell 2 through the aerator. The oxygen is discharged into the mixed liquid through the aeration pipe, so that the mixed liquid remains in an aerobic state, and the dissolved oxygen DO ≥ 2 mg / L, heterotrophic bacteria decompose organic matter into CO2 and water, and synthesize new cells at the same time. Microorganisms form activated sludge flocs through adsorption and coagulation. The activated sludge flocs have a huge surface area and rich microbial communities. They quickly capture organic matter, heavy metal ions and colloidal particles in sewage through physical adsorption and biological adsorption, which is convenient for subsequent precipitation and separation. The waste liquid treated by microbial adsorption is sucked into the secondary sedimentation tank through a pump. The activated sludge settles to the bottom of the tank due to gravity, the supernatant is discharged, and part of the settled sludge is returned to the aeration tank through the return pump. The specific model of the return pump is QJB-W submersible return pump to maintain the microbial concentration in the aeration tank.

[0009] Preferably, a bottom plate is rotatably installed inside the fixed shell, a driving motor is provided at the lower end of the bottom plate, the lower end of the driving motor is fixedly connected to the inner wall of the fixed shell, the outer shell of the driving motor is rotatably connected to the bottom plate, the driving end of the driving motor is fixedly connected to the bottom plate, and the upper end of the bottom plate is rotatably connected to the aeration pipe. When oxygen is discharged into the aeration pipe through the aerator, the bottom plate is driven to rotate by starting the driving motor, and the bottom plate drives the aeration pipe to rotate. At the same time, the rotating gear fixedly installed at the upper end of the aeration pipe drives the connecting disk to rotate along the planetary gear, driving the aeration pipe to rotate along the axis of the connecting disk while rotating, thereby improving the uniformity of contact between oxygen inside the aeration pipe and microorganisms in the mixed liquid, improving the anabolism of microorganisms, and promoting their decomposition of organic matter. The aerobic decomposition equation of microorganisms is:

[0010] .

[0011] Preferably, a cavity is formed between the fixed shell and the bottom plate, and three groups of isolation plates are arranged inside the cavity. The isolation plates are fixedly connected to the outer wall of the bottom plate and are slidably connected to the inner wall of the fixed shell. The output end of the aerator passes through the fixed shell and is connected to the cavity.

[0012] Preferably, multiple groups of flow slots are provided inside the bottom plate, and flow slots are provided between adjacent isolation plates. The upper ends of the flow slots are connected to the aeration pipe, and the lower ends of the flow slots are connected to the cavity. When the inside of the aeration pipe is aerated by the aerator, oxygen flows into the flow slots between the two adjacent isolation plates through the cavity and is discharged into the aeration pipe. Since flow slots are provided between the two adjacent isolation plates, when the driving motor drives the bottom plate to rotate, the three groups of isolation plates and the flow slots therebetween take in air in sequence, and the aeration pipes provided at the upper ends of the flow slots are also aerated in sequence. When the bottom plate rotates, the three groups of isolation plates divide the cavity into independent air chambers, and supply air to the aeration pipes in sequence through the flow slots. This sequential aeration avoids the common short circuits in traditional aeration systems. Flow or dead zone problems are solved to make the dissolved oxygen more evenly distributed in the aeration tank. When the aeration pipe is blocked due to sludge adhesion, impurity accumulation, etc., the gas cannot be discharged normally during the aeration process, resulting in a sharp increase in pressure in the cavity and the flow groove. When the pressure-increased gas cannot be discharged through the aeration pipe, it will exert a force on the isolation plate. The isolation plate is connected to the rotatable bottom plate. Under the continuous push of the high-pressure gas, the isolation plate drives the bottom plate to rotate. This rotation changes the connection position between the originally blocked flow groove and the aeration pipe, and guides the gas to other unblocked aeration pipe areas to form a new exhaust channel, thereby releasing internal pressure. At the same time, the mechanical force generated during the rotation process also helps to shake off impurities attached to the inner wall of the aeration pipe, alleviating the blockage problem.

[0013] Preferably, a horizontal exhaust hole is provided on the upper half of the outer side of the aeration tube, and an inclined exhaust hole is provided on the lower half of the outer side of the aeration tube. The inclination angle of the inclined exhaust hole is 30 degrees. A connecting shell is provided at the lower end of the aeration tube. The lower end of the connecting shell is rotatably connected to the bottom plate. The lower end of the connecting shell is connected to the flow groove. A one-way valve is provided at the upper end of the connecting shell. Two sets of slide grooves are provided on the inner wall of the aeration tube. A flow limiting component is provided for sliding inside the aeration tube. When the gas enters the aeration tube through the flow groove, it squeezes the flow limiting component at the bottom, so that the flow limiting component remains sealed and moves upward. When the flow limiting component moves upward, it squeezes the water flow inside the aeration tube, and rushes the water flow inside the lower half of the aeration tube upward at an inclination angle of 30 degrees, and the activated sludge flocs deposited at the lower end of the second reaction shell are gradually discharged under the impact of the water flow. It flows toward the upper end of the mixed solution inside the second reaction shell, and at the same time, the water flow inside the upper half of the aeration pipe pushes the water flow horizontally, diffusing the activated sludge flocs that gradually flow upward outward, thereby improving the mixing uniformity of the activated sludge flocs and the organic matter in the mixed solution and improving the decomposition efficiency of microorganisms. At the same time, as the flow-limiting component moves upward, the gas inside the aeration pipe will be gradually discharged along the aeration pipe exhaust hole at the lower end of the flow-limiting component, and undergo aerobic decomposition reaction with the microorganisms in the mixed liquid. Since the aeration pipe rotates along the axis of the connecting disk during the air jet process, the liquid and gas in the aeration pipe are sprayed out in a shower shape when discharged, so that the bubbles form a spiral trajectory in the water, prolonging the residence time of the gas in the mixed solution, and greatly improving the contact and mixing of the microorganisms and the organic matter in the mixed solution.

[0014] Preferably, the flow limiting component includes a limiting shell, the outer wall of the limiting shell is fixedly installed with two groups of sliders, the sliders match the slide grooves, the interior of the limiting shell is provided with four groups of square grooves, the interior of the square grooves is fixedly installed with connecting blocks, and the two ends of the connecting blocks are rotatably installed with limiting disks through torsion springs. The four groups of limiting disks constitute a disc. After the gas passes through the flow groove and enters the aeration pipe, it squeezes the four groups of limiting disks inside the limiting shell and squeezes the four groups of limiting disks from the open and closed state to the closed state. At this time, the limiting shell as a whole moves upward along the slide groove with the impact of the airflow, squeezing the liquid at the upper end of the aeration pipe, and the gas is squeezed out with the flow groove. The air is discharged from the squeezed exhaust holes to supply oxygen to the microorganisms in the mixed solution. At the same time, when the driving motor drives the bottom plate to rotate, the three groups of isolation plates and the flow slots in between are sequentially aerated, and the aeration pipes arranged at the upper ends of the flow slots are also aerated in sequence. After the aeration of the aeration pipes is completed, the restriction disk inside the aeration pipes gradually opens downward under the action of the torsion spring, so that the restriction shell gradually moves downward under the action of gravity to reset. When the restriction shell returns to its original position, the driving motor drives the corresponding flow slots to intake air, thereby realizing the removal of organic matter from the mixed solution inside the aeration tank.

[0015] Preferably, the method comprises the following steps:

[0016] Technical effects and advantages of the present invention:

[0017] In the present invention, the bottom plate is driven to rotate by a driving motor, so that the isolation plate and the circulation groove form a timed air supply. In conjunction with the shower-like spray of the aeration pipe, the 30° inclined exhaust holes in the lower half are used to impact the deposited sludge on the bottom of the pool, and the horizontal exhaust holes in the upper half are used to diffuse flocs. At the same time, the flow limiting component is dynamically adjusted to form pulsed aeration, which not only improves the uniformity of dissolved oxygen and the sludge suspension rate, but also avoids excessive floc fragmentation through the control of rotational shear force, realizes efficient mixing of sludge and full contact with microorganisms, and fundamentally solves the sedimentation and fragmentation problems of traditional aeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components:

[0019] Figure 1 Schematic diagram of the overall structure of the aerobic reaction tank of the present invention;

[0020] Figure 2 Schematic diagram of the internal structure of the aerobic reaction tank of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall structure of the aeration tank and the secondary sedimentation tank of the present invention;

[0022] Figure 4 Schematic diagram of the internal structure of the aeration tank of the present invention;

[0023] Figure 5 Schematic diagram of the internal structure of the aeration tank of the present invention Figure 1 ;

[0024] Figure 6 Schematic diagram of the internal structure of the aeration tank of the present invention Figure 2 ;

[0025] Figure 7 Schematic diagram of the overall structure of the aeration tube of the present invention;

[0026] Figure 8 Schematic diagram of the internal structure of the aeration tube of the present invention;

[0027] Figure 9 Schematic diagram of the current limiting component structure of the present invention Figure 1 ;

[0028] Figure 10 Schematic diagram of the current limiting component structure of the present invention Figure 2 ;

[0029] Figure 11 It is a schematic diagram of the overall structure of the device of the present invention.

[0030] Legend: 1. Aerobic reaction tank; 11. Reaction shell 1; 12. Aeration tank; 121. Aerator; 122. Fixed shell; 1221. Cavity; 1222. Isolation plate; 123. Reaction shell 2; 1231. Circular groove; 1232. Planetary gear; 124. Liquid inlet pipe; 1241. Connecting plate; 1242. Rotating gear; 125. Bottom plate; 1251. Drive motor; 1252. Circulation slot; 126. Aeration pipe; 1261. Horizontal exhaust hole; 1262. Inclined exhaust hole; 1263. Connecting shell; 1264. One-way valve; 1265. Chute; 127. Flow limiting assembly; 1271. Restriction shell; 1272. Square groove; 1273. Connecting block; 1274. Restriction plate; 1275. Torsion spring; 1276. Slider; 13. Secondary sedimentation tank. DETAILED DESCRIPTION

[0031] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0032] Reference Figure 1 、 Figure 11 As shown, the present invention provides a technical solution: a high-concentration organic wastewater treatment device and treatment method for tribasic acid rust inhibitor production, comprising a regulating tank, a control reactor is provided on one side of the regulating tank, an aerobic reaction tank 1 is provided at the output end of the control reactor, and a deep treatment tower is provided at the output end of the aerobic reaction tank 1. The wastewater produced by the tribasic acid rust inhibitor is collected in the regulating tank, and the pH value of the wastewater is adjusted to between 6 and 9 by stirring and adding reagents. The wastewater is then sent to an iron-carbon micro-electrolysis reactor for a reaction time of 1 to 2 hours, and then enters a Fenton oxidation device, and an appropriate amount of Fenton test is added according to the COD concentration of the wastewater. The agent is reacted for 30 to 60 minutes to initially degrade and transform the organic matter in the wastewater. The pretreated wastewater enters the UASB reactor, and the temperature in the reactor is controlled at 35-38°C. The hydraulic retention time is 8 to 12 hours. Under the action of anaerobic microorganisms, most of the organic matter in the wastewater is decomposed into biogas and carbon dioxide, and the COD removal rate can reach 70% to 80%. The wastewater after anaerobic treatment enters the aerobic reaction tank. When using the activated sludge method, the sludge concentration is controlled at 3 to 5 g / L and the aeration time is 8 to 12 hours, so that the organic matter in the wastewater is further decomposed by aerobic microorganisms.

[0033] Reference Figure 1-2As shown, in this embodiment: the aerobic reaction tank 1 includes a reaction shell 11, an aeration tank 12 is provided inside the reaction shell 11, and a secondary sedimentation tank 13 is provided inside the reaction shell 11.

[0034] Reference Figure 2-3 As shown, in this embodiment: the aeration tank 12 includes an aerator 121, model RB-52S-1 3 kW double impeller vortex air pump, the output end of the aerator 121 is fixedly installed with a fixed shell 122, the upper end of the fixed shell 122 is fixedly installed with a second reaction shell 123, the upper end of the second reaction shell 123 is provided with a circular groove 1231, the side surface of the circular groove 1231 is fixedly installed with a planetary gear 1232, the upper end of the second reaction shell 123 is provided with a liquid inlet pipe 124, the lower end of the liquid inlet pipe 124 is rotatably installed with a connecting disk 1241, and the connecting disk 1241 is located at the reaction The interior of the second shell 123 is connected to the shell 123 in rotation. The upper end of the connecting disk 1241 is equipped with multiple sets of rotating gears 1242, which are meshed with the planetary gears 1232. The lower end of the rotating gear 1242 is penetrated by an aeration pipe 126. When the device is needed to degrade organic matter in wastewater, the waste liquid is discharged into the interior of the second reaction shell 123 through the liquid inlet pipe 124, and oxygen is discharged into the interior of the second reaction shell 123 through the aerator 121. The oxygen is discharged into the mixed liquid through the aeration pipe 126, so that the mixed liquid remains in an aerobic state, and the dissolved oxygen DO ≥ 2 mg / L, heterotrophic bacteria decompose organic matter into CO2 and water, and synthesize new cells at the same time. Microorganisms form activated sludge flocs through adsorption and coagulation. The activated sludge flocs have a huge surface area and rich microbial communities. They quickly capture organic matter, heavy metal ions and colloidal particles in sewage through physical adsorption and biological adsorption, which is convenient for subsequent precipitation and separation. The waste liquid treated by microbial adsorption is sucked into the secondary sedimentation tank 13 through a pump. The activated sludge settles to the bottom of the tank due to gravity, and the supernatant is discharged. Part of the settled sludge is returned to the aeration tank 12 through a reflux pump. The specific model of the reflux pump is a QJB-W submersible reflux pump to maintain the microbial concentration in the aeration tank 12.

[0035] Reference Figure 2-5As shown, in this embodiment: a bottom plate 125 is rotatably mounted inside the fixed shell 122, a driving motor 1251 is provided at the lower end of the bottom plate 125, the lower end of the driving motor 1251 is fixedly connected to the inner wall of the fixed shell 122, the outer shell of the driving motor 1251 is rotatably connected to the bottom plate 125, the driving end of the driving motor 1251 is fixedly connected to the bottom plate 125, the upper end of the bottom plate 125 is rotatably connected to the aeration pipe 126, and when oxygen is discharged into the aeration pipe 126 through the aerator 121, the driving motor 1251 is started. 1251 drives the bottom plate 125 to rotate, and the bottom plate 125 drives the aeration tube 126 to rotate. At the same time, the rotating gear 1242 fixed on the upper end of the aeration tube 126 drives the connecting plate 1241 to rotate along the planetary gear 1232, driving the aeration tube 126 to rotate along the axis of the connecting plate 1241 while rotating on its own, thereby improving the uniformity of contact between oxygen inside the aeration tube 126 and the microorganisms in the mixed liquid, improving the anabolism of the microorganisms, and promoting their decomposition of organic matter. The aerobic decomposition equation of the microorganisms is:

[0036] .

[0037] Reference Figure 5-6 As shown, in this embodiment: a cavity 1221 is formed between the fixed shell 122 and the bottom plate 125, and three groups of isolation plates 1222 are arranged inside the cavity 1221. The isolation plates 1222 are fixedly connected to the outer wall of the bottom plate 125, and the isolation plates 1222 are slidably connected to the inner wall of the fixed shell 122. The output end of the aerator 121 passes through the fixed shell 122 and is connected to the cavity 1221.

[0038] Reference Figure 5-6As shown, in this embodiment: the interior of the bottom plate 125 is provided with multiple groups of flow slots 1252, and a flow slot 1252 is provided between adjacent isolation plates 1222. The upper end of the flow slot 1252 is connected to the aeration pipe 126, and the lower end of the flow slot 1252 is connected to the cavity 1221. When the interior of the aeration pipe 126 is aerated by the aerator 121, oxygen flows into the flow slot 1252 between two adjacent isolation plates 1222 through the cavity 1221. The air is discharged from the aeration pipe 126. Since a flow slot 1252 is provided between two adjacent isolation plates 1222, when the driving motor 1251 drives the bottom plate 125 to rotate, the three groups of isolation plates 1222 and the flow slot 1252 therebetween take in air in sequence, and the aeration pipe 126 provided at the upper end of the flow slot 1252 also performs aeration in sequence. When the bottom plate 125 rotates, the three groups of isolation plates 1222 separate the cavity 1221 into independent air chambers, and the air is discharged from the cavity 1221 through the flow slot 1252. Air is supplied to the aeration pipe 126 at a time. This timed aeration avoids the short-flow or dead zone problems common in traditional aeration systems, making the dissolved oxygen more evenly distributed in the aeration tank. When the aeration pipe 126 is blocked due to sludge adhesion, impurity accumulation, etc., the gas cannot be discharged normally during the aeration process, causing the pressure in the cavity 1221 and the flow groove 1252 to rise sharply. When the pressure-increasing gas cannot be discharged through the aeration pipe, it exerts a force on the isolation plate 1222. The isolation plate 1222 is connected to the rotatable bottom plate 125. Under the continuous push of the high-pressure gas, the isolation plate 1222 drives the bottom plate 125 to rotate. This rotation changes the connection position between the originally blocked flow groove 1252 and the aeration pipe 126, directing the gas to other unblocked areas of the aeration pipe 126, forming a new exhaust channel, thereby releasing internal pressure. At the same time, the mechanical force generated during the rotation also helps to shake off impurities attached to the inner wall of the aeration pipe 126, alleviating the blockage problem.

[0039] Reference Figure 5-8As shown, in this embodiment: a horizontal exhaust hole 1261 is provided on the upper half of the outer side of the aeration tube 126, an inclined exhaust hole 1262 is provided on the lower half of the outer side of the aeration tube 126, and the inclined exhaust hole 1262 has an inclination angle of 30 degrees. A connecting shell 1263 is provided at the lower end of the aeration tube 126, and the lower end of the connecting shell 1263 is rotatably connected to the bottom plate 125, and the lower end of the connecting shell 1263 is connected to the flow groove 1252. A one-way valve 1263 is provided at the upper end of the connecting shell 1263. 64. Two sets of chutes 1265 are provided on the inner wall of the aeration tube 126. A flow limiting assembly 127 is provided for sliding inside the aeration tube 126. When the gas enters the aeration tube 126 through the flow slot 1252, it squeezes the flow limiting assembly 127 at the bottom, causing the flow limiting assembly 127 to move upward while maintaining a sealed state. When the flow limiting assembly 127 moves upward, it squeezes the water flow inside the aeration tube 126, and the water flow inside the lower half of the aeration tube 126 is pushed upward at an angle of 30 degrees. The activated sludge flocs deposited at the lower end of the second reaction shell 123 gradually flow toward the upper end of the mixed solution inside the second reaction shell 123 under the impact of the water flow. At the same time, the water flow inside the upper half of the aeration pipe 126 pushes the water flow horizontally, diffusing the activated sludge flocs gradually flowing upward outward, thereby improving the mixing uniformity of the activated sludge flocs and the organic matter in the mixed solution and improving the decomposition efficiency of the microorganisms. At the same time, as the flow limiting component 127 moves upward, the gas inside the aeration pipe 126 will gradually be discharged along the exhaust hole of the aeration pipe 126 at the lower end of the flow limiting component 127, and undergo aerobic decomposition reaction with the microorganisms in the mixed liquid. Since the aeration pipe 126 rotates along the axis of the connecting disk 1241 during the air jet process, it also rotates on its own. When the liquid and gas in the aeration pipe 126 are discharged, they are sprayed in a shower shape, so that the bubbles form a spiral trajectory in the water, prolonging the residence time of the gas in the mixed solution, and greatly improving the contact and mixing between the microorganisms and the organic matter in the mixed solution.

[0040] Reference Figure 7-10As shown, in this embodiment: the flow limiting component 127 includes a limiting shell 1271, and two groups of sliders 1276 are fixedly installed on the outer wall of the limiting shell 1271. The sliders 1276 match the slide grooves 1265. Four groups of square grooves 1272 are opened inside the limiting shell 1271. The interior of the square grooves 1272 is fixedly installed with connecting blocks 1273. The two ends of the connecting blocks 1273 are rotatably installed with limiting disks 1274 through torsion springs 1275. The four groups of limiting disks 1274 constitute a disc. After the gas passes through the circulation groove 1252 and enters the aeration pipe 126, it squeezes the four groups of limiting disks 1274 inside the limiting shell 1271 and squeezes the four groups of limiting disks 1274 from the open and closed state to the closed state. At this time, the limiting shell 1271 as a whole moves upward along the slide groove 1265 with the impact of the air flow, and the aeration pipe 1 26, and the gas is discharged from the squeezed exhaust holes to supply oxygen to the microorganisms in the mixed solution. At the same time, when the driving motor 1251 drives the bottom plate 125 to rotate, the three groups of isolation plates 1222 and the flow slot 1252 therebetween are sequentially aerated, and the aeration pipe 126 arranged at the upper end of the flow slot 1252 is also aerated in sequence. After the aeration of the aeration pipe 126 is completed, the limiting disk 1274 inside the aeration pipe 126 is gradually opened downward under the action of the torsion spring 1275, so that the limiting shell 1271 gradually moves downward under the action of gravity to reset. When the limiting shell 1271 returns to its original position, the driving motor 1251 drives the corresponding flow slot 1252 to take in air, thereby realizing the removal of organic matter from the mixed solution inside the aeration tank 12.

[0041] In order to further better explain the above embodiment, the present invention also provides an embodiment, a separation method of a high-concentration organic wastewater treatment device produced by a tribasic acid rust inhibitor, comprising the following steps:

[0042] Step 1: Collect the wastewater from the production of tribasic acid rust inhibitor into a regulating tank. Adjust the pH value of the wastewater to between 6 and 9 by stirring and adding reagents. Then send the wastewater into an iron-carbon micro-electrolysis reactor for a reaction time of 1-2 hours. After that, it enters the Fenton oxidation device. According to the COD concentration of the wastewater, an appropriate amount of Fenton reagent is added. The reaction lasts for 30-60 minutes to achieve preliminary degradation and conversion of organic matter in the wastewater.

[0043] Step 2: The pretreated wastewater enters the UASB reactor. The temperature inside the reactor is controlled at 35-38°C, and the hydraulic retention time is 8-12 hours. Under the action of anaerobic microorganisms, most of the organic matter in the wastewater is decomposed into biogas and carbon dioxide, and the COD removal rate can reach 70%-80%;

[0044] Step 3: The wastewater after anaerobic treatment enters the aerobic reaction tank. When using the activated sludge method, the sludge concentration is controlled at 3-5g / L and the aeration time is 8-12 hours, so that the organic matter in the wastewater is further decomposed by aerobic microorganisms;

[0045] Step 31: The waste liquid is discharged into the interior of the second reaction shell 123 through the liquid inlet pipe 124. The waste liquid initially contacts the activated sludge in the aeration tank 12. The aerator 121 delivers oxygen to the cavity 1221 in the fixed shell 122. The oxygen enters the aeration pipe 126 through the flow groove 1252 of the bottom plate 125. The drive motor 1251 drives the bottom plate 125 to rotate. At the same time, the aeration pipe 126 rotates along the axis of the connecting plate 1241 and rotates on its own through the engagement of the rotating gear 1242 with the planetary gear 1232, thereby initially mixing the waste water and the activated sludge.

[0046] Step 32: When the bottom plate 125 rotates, the three groups of isolation plates 1222 separate the cavity 1221 into independent air chambers. The circulation slots 1252 supply air to the aeration pipes 126 in sequence, forming periodic aeration and ensuring uniform distribution of dissolved oxygen. The 30° inclined exhaust holes 1262 in the lower half of the aeration pipes 126 spray oblique water flow, impacting the activated sludge flocs deposited at the bottom of the tank, causing them to float into the mixed liquid. The horizontal exhaust holes 1261 in the upper half spray horizontal water flow, spreading the floating flocs to the surrounding area, improving the uniformity of the mixing of sludge and organic matter. Heterotrophic bacteria decompose organic matter into CO2 and water in an aerobic environment, while synthesizing new cells. The activated sludge flocs capture pollutants through physical and biological adsorption, preparing for subsequent sedimentation and separation.

[0047] Step 33: After the gas enters the aeration tube 126, it squeezes the flow-limiting component 127, pushing the water out of the exhaust hole. At the same time, the gas is discharged through the exhaust hole at the lower end of the flow-limiting component, forming pulsed aeration to improve oxygen utilization. When the flow-limiting component 127 is reset, it scrapes the inner wall of the aeration tube to help remove sludge.

[0048] Step 34: The mixed liquor degraded by microorganisms is pumped into the secondary sedimentation tank 13, where the activated sludge settles to the bottom of the tank due to gravity, and the supernatant is discharged as treated water;

[0049] Step 4: The wastewater after aerobic treatment enters the deep treatment unit, first passes through the sand filter to remove suspended matter in the wastewater, and then enters the activated carbon filter to adsorb residual organic matter and further reduce the COD and color of the wastewater.

[0050] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A high-concentration organic wastewater treatment device for the production of tribasic acid rust inhibitors, characterized in that: The aerobic reaction tank includes a reaction shell 1, and an aeration tank is provided inside the reaction shell 1; The aeration tank includes an aerator, the output end of the aerator is fixedly mounted with a fixed shell, and the upper end of the fixed shell is fixedly mounted with a second reaction shell; A bottom plate is rotatably mounted inside the fixed shell, a driving motor is provided at the lower end of the bottom plate, the lower end of the driving motor is fixedly connected to the inner wall of the fixed shell, the outer shell of the driving motor is rotatably connected to the bottom plate, the driving end of the driving motor is fixedly connected to the bottom plate, and an aeration pipe is rotatably mounted on the upper end of the bottom plate; A horizontal exhaust hole is provided on the upper half of the outer side of the aeration tube, an inclined exhaust hole is provided on the lower half of the outer side of the aeration tube, a connecting shell is provided at the lower end of the aeration tube, the lower end of the connecting shell is rotatably connected to the bottom plate, the lower end of the connecting shell is communicated with the bottom plate, a one-way valve is provided at the upper end of the connecting shell, two sets of slide grooves are provided on the inner wall of the aeration tube, and a flow limiting component is slidably provided inside the aeration tube; A cavity is formed between the fixed shell and the bottom plate; Three groups of isolation plates are provided inside the cavity. The isolation plates are fixedly connected to the outer wall of the bottom plate and are slidably connected to the inner wall of the fixed shell. The output end of the aerator passes through the fixed shell and is connected to the cavity.

2. The high-concentration organic wastewater treatment device for the production of tribasic acid rust inhibitor according to claim 1, characterized in that: A secondary sedimentation tank is provided inside the first reaction shell, and the secondary sedimentation tank is connected to the aeration tank.

3. The high-concentration organic wastewater treatment device for the production of tribasic acid rust inhibitor according to claim 1, characterized in that: A circular groove is provided at the upper end of the second reaction housing, and a planetary gear is fixedly mounted on the side surface of the circular groove.

4. The high-concentration organic wastewater treatment device for the production of tribasic acid rust inhibitor according to claim 3, characterized in that: A liquid inlet pipe is provided at the upper end of the reaction shell 2, and a connecting disk is rotatably installed at the lower end of the liquid inlet pipe. The connecting disk is located inside the reaction shell 2 and is rotatably connected thereto. A plurality of sets of rotating gears are installed at the upper end of the connecting disk, and the rotating gears are meshed with the planetary gears. The lower ends of the rotating gears are fixedly connected to the aeration pipe.

5. The high-concentration organic wastewater treatment device for the production of tribasic acid rust inhibitor according to claim 1, characterized in that: A plurality of flow slots are provided inside the bottom plate, and flow slots are provided between adjacent isolation plates. The upper ends of the flow slots are communicated with the aeration pipes, and the lower ends of the flow slots are communicated with the cavity.

6. The high-concentration organic wastewater treatment device for the production of tribasic acid rust inhibitor according to claim 1, characterized in that: The current limiting assembly includes a limiting shell, and two groups of sliding blocks are fixedly installed on the outer wall of the limiting shell, and the sliding blocks match the sliding grooves.

7. The high-concentration organic wastewater treatment device for the production of tribasic acid rust inhibitor according to claim 6, characterized in that: Four groups of square grooves are opened inside the limiting shell, and connecting blocks are fixedly installed inside the square grooves. Torsion springs are fixedly installed at both ends of the connecting block, and limiting disks are rotatably installed at both ends of the connecting block through the torsion springs.

8. The separation method of the high-concentration organic wastewater treatment device produced by the tribasic acid rust inhibitor according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The wastewater from the production of tribasic acid rust inhibitor is collected into a regulating tank. The pH value of the wastewater is adjusted to between 6 and 9 by stirring and adding reagents. The wastewater is then sent to an iron-carbon micro-electrolysis reactor for a reaction time of 1-2 hours. After that, it enters a Fenton oxidation device. An appropriate amount of Fenton reagent is added according to the COD concentration of the wastewater, and the reaction is carried out for 30-60 minutes. S2: The pretreated wastewater enters the UASB reactor, and the temperature inside the reactor is controlled at 35-38°C, and the hydraulic retention time is 8-12 hours; S3: The wastewater after anaerobic treatment enters the aerobic reaction tank. When the activated sludge method is used, the sludge concentration is controlled at 3-5g / L and the aeration time is 8-12 hours; S31: The waste liquid is discharged into the interior of the second reaction shell through the liquid inlet pipe. The waste liquid initially contacts the activated sludge in the aeration tank. The aerator delivers oxygen to the cavity in the fixed shell. The oxygen enters the aeration pipe through the flow groove of the bottom plate. The drive motor drives the bottom plate to rotate. At the same time, the aeration pipe rotates along the axis of the connecting plate and rotates on its own through the meshing of the rotating gear and the planetary gear, thereby initially mixing the wastewater and the activated sludge. S32: When the bottom plate rotates, three sets of isolation plates divide the cavity into independent air chambers. The flow slots supply air to the aeration pipes in turn. The 30° inclined exhaust holes in the lower part of the aeration pipes spray oblique water flow, impacting the activated sludge flocs deposited at the bottom of the tank, causing them to float into the mixed liquid. The horizontal exhaust holes in the upper part spray horizontal water flow, spreading the floating flocs to the surrounding areas. S33: After the gas enters the aeration tube, it squeezes the flow-limiting component, pushing the water out from the exhaust hole. At the same time, the gas is discharged through the exhaust hole at the lower end of the flow-limiting component. When the flow-limiting component resets, it scrapes the inner wall of the aeration tube. S34: The mixed liquor degraded by microorganisms is pumped into the secondary sedimentation tank, where the activated sludge settles to the bottom of the tank due to gravity, and the supernatant is discharged as treated water; S4: The wastewater after aerobic treatment enters the deep treatment unit, first passes through the sand filter to remove suspended matter in the wastewater, and then enters the activated carbon filter tank.

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