Phenol-containing sodium sulfate wastewater treatment equipment

Abstract

The present application relates to wastewater treatment technical field, and discloses a kind of phenolic sodium sulphate wastewater treatment equipment, including treatment pool, oil separation tank is installed on the upper side of the inner wall of treatment pool, the cavity in treatment pool is divided into air floatation chamber and acidification chamber along left and right direction, and the lower end of oil separation tank is located in the cavity, and oil removal part is arranged on treatment pool and oil separation tank, and the upper air floatation chamber is provided with slag removal part.The phenolic sodium sulphate wastewater treatment equipment can effectively solve the problem in the prior art that the pretreatment equipment for phenolic sodium sulphate wastewater is dispersedly arranged, the processes of oil separation, acidification, air floatation and the like are independently arranged, resulting in large floor area, complex pipeline connection, complicated operation control, and it is difficult to realize integrated continuous treatment;Moreover, the removal operation of floating oil and floating slag in conventional pretreatment equipment is complex, the oil and slag scraping components do not cooperate well with the wastewater level, the cleaning effect is poor, frequent manual intervention is required, and the oil and slag removal method is not convenient and thorough.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device containing sodium sulfate containing phenol. Background Technology

[0002] Phenolic sodium sulfate wastewater mainly originates from processes such as sulfonation, alkali fusion, and acidification in fine chemical industries, as well as coal chemical and pharmaceutical industries. It often contains phenolic substances such as phenol, cresol, nitrophenol, and naphthol, along with dissolved sodium sulfate. It is characterized by high salinity, high chemical oxygen demand (COD), deep color, poor biodegradability, and strong biological toxicity. Treatment processes for phenolic sodium sulfate wastewater are typically designed based on the principle of "resource recovery first, graded treatment," and mainly include: pretreatment, phenol removal, desalination and evaporation crystallization, and advanced treatment.

[0003] In response to this, this application designs a treatment device for sodium sulfate containing phenol. Existing pretreatment equipment for sodium sulfate containing phenol is characterized by dispersed treatment units, with independent processes such as oil separation, acidification, and flotation. This results in a large footprint, complex pipeline connections, and cumbersome operation and control, making it difficult to achieve integrated continuous treatment. Furthermore, the removal of floating oil and scum in conventional pretreatment equipment is complex, the oil and scum scraping components do not coordinate well with the wastewater level, resulting in poor cleaning effect and requiring frequent manual intervention. The oil and scum removal methods are not convenient or thorough enough. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a treatment device for sodium sulfate-containing phenolate wastewater. This device effectively solves the problems of existing pretreatment equipment where the various treatment units are dispersed, and processes such as oil separation, acidification, and flotation are independently set up. This results in large floor space, complex piping connections, and cumbersome operation and control, making integrated continuous treatment difficult. Furthermore, conventional pretreatment equipment involves complex operations for removing floating oil and scum, poor coordination between the oil and scum scraping components and the wastewater level, poor cleaning effect, frequent manual intervention, and inconvenient and incomplete oil and scum removal methods.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a wastewater treatment device for sodium sulfate containing phenol, comprising: The treatment tank has an oil separator installed on the upper side of its inner wall. The cavity at the lower end of the oil separator in the treatment tank is divided into an air flotation chamber and an acidification chamber in the left and right directions. The treatment tank and the oil separator are both equipped with an oil cleaning section, and the air flotation chamber is equipped with a sludge cleaning section. The inner wall of the oil separator is provided with two sets of baffles evenly distributed on the left and right. Each set of baffles consists of two baffles arranged alternately on the left and right. A porous baffle is slidably installed in the middle of the inner wall of the oil separator. The oil cleaning section includes two upper baffles with limiting sliding holes on the lower side. A guide oblique hole is provided in the middle of the left end of the multi-porous baffle. A connecting bracket is slidably installed on the inner wall of the limiting sliding hole and the guide oblique hole. The connecting bracket consists of two left and right connecting rods and a U-shaped sliding sleeve. The U-shaped sliding sleeve is slidably sleeved on the corresponding baffle. A U-shaped push plate is fixedly sleeved on the outer wall of the connecting bracket on the left and right sides of the multi-porous baffle. The left and right ends of the U-shaped push plate are slidably attached to the multi-porous baffle or the corresponding baffle. A drive assembly is provided on both the treatment tank and the multi-porous baffle. An opening and closing assembly is provided on the oil discharge pipe.

[0006] Furthermore, an inlet is provided at the left end of the oil separator, and an outlet connected to the acidification chamber is provided at the lower right end of the oil separator. A cover plate is detachably installed at the upper end of the oil separator. A filter basket is placed on the inner wall of the left end of the oil separator and on the baffle plate on the left side through a rectangular strip. A second porous baffle plate is installed on the right side of the inner wall of the oil separator. An oil discharge pipe is connected to the position at the rear end of the treatment tank corresponding to the upper side of the left baffle plate and the first porous baffle plate.

[0007] Furthermore, the drive assembly includes a rectangular sliding hole at the lower end of the oil separator corresponding to the porous baffle plate. The inner wall of the treatment tank and the rectangular sliding hole at the lower end of the oil separator are symmetrically equipped with baffles. The outer wall of the porous baffle plate slides against the inner wall of the rectangular sliding hole and the opposite end faces of the two baffles. A sealing plate is slidably installed between the two baffles on the lower side. The sealing plate has a T-shaped structure. A connecting plate fixedly connected to the porous baffle plate is installed at the upper end of the sealing plate. Guide slide rods with limit plates at the lower end are symmetrically installed at the front and rear of the sealing plate. The guide slide rods slide through the treatment tank. A pneumatic push rod is also installed at the lower end of the treatment tank. The telescopic end of the pneumatic push rod slides through the treatment tank and is fixedly connected to the sealing plate.

[0008] Furthermore, the opening and closing assembly includes several connecting ports located at the rear end of the oil separator, corresponding to both the left-side baffle and the porous flow barrier. These ports are linearly and evenly distributed and connected to the oil drain pipe. A receiving groove is provided on the upper inner wall of the connecting port, and an electromagnet is embedded in the upper inner wall of the receiving groove. A magnetic sealing strip is also slidably installed on the inner wall of the receiving groove via a buffer spring. A flow-blocking weir is installed on the lower inner wall of the connecting port corresponding to the magnetic sealing strip. The opposite ends of the magnetic sealing strip and the flow-blocking weir have a concave-convex fit structure design.

[0009] Furthermore, a microbubble generator is installed on the inner wall at the bottom of the flotation chamber, and a conveying pipe is installed through the rear end of the treatment tank, which is connected to the microbubble generator. Ultrasonic transducers are symmetrically installed at the left end of the treatment tank corresponding to the front and rear of the flotation chamber. A slag discharge pipe is connected to the upper side of the flotation chamber at the rear end of the treatment tank, and a drain pipe is connected to the lower side of the flotation chamber at the rear end of the treatment tank. An extension plate structure is integrally installed at the upper end of the drain pipe.

[0010] Furthermore, the slag removal section includes a load-bearing plate installed on the left end of the partition on the right side and on the inner wall of the flotation chamber. Several load-bearing plates are installed, and the load-bearing plates are evenly distributed in a rectangular shape. U-shaped push plates are slidably installed on the opposite ends of the upper and lower load-bearing plates. A drive group 2 is set on the treatment tank and the U-shaped push plate 2. An opening and closing group 2 is set on the drain pipe.

[0011] Furthermore, the drive assembly two includes a mounting base installed on the upper end of the U-shaped push plate two. Limiting slide rods are symmetrically installed on the inner walls of the front and rear ends of the air flotation chamber. A lead screw is rotatably installed through the front end of the treatment tank. The rear end of the lead screw is rotatably connected to the inner wall of the treatment tank. A servo motor two for driving the lead screw to rotate is installed at the front end of the treatment tank. The mounting base is threaded to the lead screw and simultaneously slides on the outer walls of the two limiting slide rods.

[0012] Furthermore, the second opening and closing assembly includes a receiving groove two located on the inner wall of the upper end of the slag discharge pipe. An electromagnet two is embedded in the inner wall of the upper end of the receiving groove two. A magnetic sealing strip two is also slidably installed on the receiving groove two through a buffer spring. A flow-blocking weir strip two is installed on the inner wall of the lower end of the slag discharge pipe corresponding to the magnetic sealing strip two. The opposite ends of the magnetic sealing strip two and the flow-blocking weir strip two are designed with a concave-convex fit structure.

[0013] Furthermore, the inner walls of the U-shaped openings of several U-shaped push plates are each equipped with several sets of linearly and evenly distributed air holes. Each set of air holes consists of several circumferentially distributed air holes. The front end of the left-side U-shaped push plate is connected to a telescopic hose. The head and tail ends of the telescopic hose are fixed through the oil separator and the treatment tank by sealing rings, respectively. Several air holes and the telescopic hose are connected to the internal air passages of the U-shaped push plate. Connecting air holes are provided at the opposite ends of two adjacent U-shaped push plates. A docking plate with docking vents is also installed between the push plates. The docking vents on the U-shaped push plate and the docking plate are interconnected. The inner wall of the U-shaped push plate also has several sets of linearly and evenly distributed vents. Each set of vents consists of several vents that are evenly distributed in a circle. The front end of the U-shaped push plate is connected to a telescopic hose. The head and tail ends of the telescopic hose are fixed through the oil separator and the treatment tank by sealing rings, respectively. Several vents and the telescopic hose are connected to the internal air passage of the U-shaped push plate.

[0014] Furthermore, a drive shaft is rotatably installed on the inner wall of the bottom of the acidification chamber and the lower end of the oil separator. A turbine agitator and a slanted wing agitator are fixedly fitted on the upper and lower sides of the outer wall of the drive shaft, respectively. A support frame is installed on the right end of the partition plate and the inner wall of the acidification chamber. The support frame consists of an annular plate and several rectangular connecting plates evenly distributed around the circumference. A flow guide plate is installed on the inner wall of the annular plate. Both the upper and lower ends of the flow guide plate are flared structures. A servo motor for driving the drive shaft to rotate is also installed at the lower end of the treatment tank. An acid replenishment pipe is also connected to the front end of the treatment tank corresponding to the upper side of the acidification chamber.

[0015] The technical solution provided by this invention has the following advantages compared with the prior art: This invention provides a wastewater treatment device for sodium sulfate containing phenolate. During the acidification and simultaneous oil removal stages, the pneumatic push rod extends upwards, driving the sealing plate to move upwards between the two partitions on the left and right sides. Its lower end gradually detaches from the inner wall of the bottom of the treatment tank, opening the channel between the acidification chamber and the flotation chamber. The acidified wastewater enters the flotation chamber under gravity. Simultaneously, the sealing plate, through a connecting plate, drives a porous flow-blocking plate to rise synchronously along the inner wall of a rectangular sliding hole. The guide oblique hole on the porous flow-blocking plate has a front-high, rear-low structure. During the rise of the porous flow-blocking plate, it pushes the connecting bracket to slide backwards along the limiting sliding hole, driving the U-shaped push plate to move backwards synchronously. This scrapes the floating oil on the surface of the oil separator towards the oil discharge pipe. The electromagnet is energized, causing the magnetic sealing strip to retract into the receiving tank, disengaging from the flow-blocking weir strip. The connecting port opens, allowing the floating oil to enter the oil discharge pipe. Gas is introduced through the air hole on the U-shaped push plate via a telescopic hose to form an air curtain, promoting the demulsification and aggregation of the floating oil. By using a pneumatic pusher to open the sealing plate and move the U-shaped pusher plate backward, acidification and oil removal can be carried out simultaneously, shortening the batch processing cycle. The inclined design of the guide hole, which is higher at the front and lower at the back, reliably converts the vertical lifting motion into a horizontal oil scraping motion. The air curtain further improves the oil removal efficiency and effectively prevents oil from entering the air flotation chamber and causing secondary pollution.

[0016] During the flotation sludge removal stage, after the acidified wastewater enters the flotation chamber, the microbubble generator produces a large number of microbubbles, which combine with free phenol, residual floating oil, and fine suspended solids in the wastewater and are carried to the liquid surface to form sludge. The ultrasonic transducer applies ultrasonic waves to the wastewater to break up the oil-water emulsion film. After the sludge floats to the surface in the flotation chamber, the servo motor drives the lead screw to rotate, and the mounting base slides backward along the two limit slides on the left and right sides. The U-shaped push plate slides between the upper and lower load-bearing plates, pushing the sludge towards the sludge discharge pipe. The air hole on the U-shaped push plate introduces gas through the telescopic hose, forming an air curtain in the U-shaped opening to assist in the aggregation and scraping of sludge. The synergistic effect of microbubble flotation and ultrasonic waves effectively removes residual free phenol and suspended solids in the acidified wastewater, reducing the load of subsequent phenol removal treatment. The combination of mechanical sludge removal and air curtain assistance improves the sludge removal efficiency and prevents sludge from accumulating in the flotation chamber and affecting the quality of the effluent. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a first-view three-dimensional structural diagram in an embodiment of the present invention; Figure 2 This is a schematic diagram of the second-view three-dimensional structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of a partial three-dimensional cross-section of the treatment tank, oil separator, and oil cleaning section in an embodiment of the present invention; Figure 4 This is a schematic diagram of a partial three-dimensional cross-section of the treatment tank, oil separator, and slag removal section in an embodiment of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of section X in the middle; Figure 6 This is a schematic diagram of the three-dimensional separation of the oil separator and the opening / closing assembly in an embodiment of the present invention; Figure 7 This is a schematic diagram of the three-dimensional separation of the oil separator and the oil cleaning section in an embodiment of the present invention; Figure 8 This is a schematic diagram of a partial three-dimensional cross-section of the oil separator and the oil cleaning section in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram of the U-shaped push plate in an embodiment of the present invention; Figure 10 This is a schematic diagram of a partial three-dimensional cross-section of the treatment tank and acidification chamber in an embodiment of the present invention; Figure 11 This is a schematic diagram of a partial three-dimensional cross-section of the treatment tank, flotation chamber, and sludge removal section in an embodiment of the present invention; Figure 12 This is a three-dimensional structural diagram of the U-shaped push plate and the mounting base in an embodiment of the present invention.

[0019] The labels in the diagram represent: 1. Treatment tank; 11. Acidification chamber; 111. Drive shaft; 112. Turbine agitator; 113. Slanted airfoil agitator; 114. Support frame; 115. Flow guide plate; 116. Servo motor one; 117. Acid replenishment pipe; 12. Air flotation chamber; 121. Microbubble generator; 122. Ultrasonic transducer; 123. Slag discharge pipe; 124. Drainage pipe; 2. Oil separator; 21. Cover plate; 22. Baffle plate; 23. Filter basket; 24. Porous baffle plate one; 25. Porous baffle plate two; 26. Oil discharge pipe; 3. Oil cleaning section; 31. Limiting sliding hole; 32. Guide inclined hole; 33. Connecting bracket; 34. U-shaped push plate one; 341. Air hole one; 342. Telescopic hose one; 343. Docking plate; 35. Drive assembly 1; 351. Rectangular sliding hole; 352. Partition plate; 353. Sealing plate; 354. Connecting plate; 355. Guide slide rod; 356. Pneumatic push rod; 36. Opening and closing assembly 1; 361. Receiving groove 1; 362. Electromagnet 1; 363. Magnetic sealing strip 1; 364. Flow-blocking weir strip 1; 4. Slag removal section; 41. Load-bearing plate; 42. U-shaped push plate 2; 421. Air hole 2; 422. Telescopic hose 2; 43. Drive assembly 2; 431. Mounting base; 432. Limiting slide rod; 433. Lead screw; 434. Servo motor 2; 44. Opening and closing assembly 2; 441. Receiving groove 2; 442. Electromagnet 2; 443. Magnetic sealing strip 2; 444. Flow-blocking weir strip 2. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Example: Please see Figures 1-12 This invention provides a technical solution: a wastewater treatment device for sodium sulfate containing phenol, comprising: Treatment tank 1, with an oil separator 2 installed on the upper side of the inner wall of treatment tank 1. The cavity located at the lower end of the oil separator 2 in treatment tank 1 is divided into an air flotation chamber 12 and an acidification chamber 11 in the left and right directions. An oil cleaning section 3 is provided on both treatment tank 1 and oil separator 2, and a slag cleaning section 4 is provided on the air flotation chamber 12. Among them, the inner wall of the oil separator 2 is provided with two sets of baffles 22 that are evenly distributed from left to right. Each set of baffles 22 consists of two baffles 22 that are staggered from left to right. A porous baffle plate 24 is slidably installed in the middle of the inner wall of the oil separator 2. The cleaning section 3 includes two upper baffles 22 with limiting sliding holes 31 on the lower side. A guide oblique hole 32 is provided in the middle of the left end of the porous baffle 24. The guide oblique hole 32 is designed to be higher in the front and lower in the back. A connecting bracket 33 is slidably installed on the inner wall of the limiting sliding hole 31 and the guide oblique hole 32. The connecting bracket 33 consists of two connecting rods on the left and right sides and a U-shaped sliding sleeve. The U-shaped sliding sleeve is slidably fitted on the corresponding baffle 22. U-shaped push plates 34 are fixedly fitted on the outer wall of the connecting bracket 33 on the left and right sides of the porous baffle 24. The left and right ends of the U-shaped push plates 34 are slidably attached to the porous baffle 24 or the corresponding baffle 22. A drive group 35 is provided on the treatment tank 1 and the porous baffle 24. An opening and closing group 36 is provided on the oil discharge pipe 26.

[0023] The oil separator 2 has an inlet at the left end and an outlet at the lower right end that connects to the acidification chamber 11. The upper end of the oil separator 2 is detachably fitted with a cover plate 21. A filter basket 23 is placed on the inner wall of the left end of the oil separator 2 and the baffle plate 22 on the left side through a rectangular strip. A porous baffle plate 25 is installed on the right side of the inner wall of the oil separator 2. An oil drain pipe 26 is connected to the upper side of the baffle plate 22 and the porous baffle plate 24 on the left side at the rear end of the treatment tank 1.

[0024] Drive assembly 35 includes a rectangular sliding hole 351 located at the lower end of the oil separator 2, corresponding to the porous baffle plate 24. Baffle plates 352 are symmetrically installed on both the inner wall of the treatment tank 1 and the lower end of the oil separator 2, corresponding to the rectangular sliding hole 351. The outer wall of the porous baffle plate 24 simultaneously slides against the inner wall of the rectangular sliding hole 351 and the opposite end faces of the two baffle plates 352. A sealing plate 353 is slidably installed between the two baffle plates 352 on the lower side. The blocking plate 353 has a T-shaped structure. The upper end of the blocking plate 353 is equipped with a connecting plate 354 that is fixedly connected to the porous baffle plate 24. The lower end of the blocking plate 353 is symmetrically equipped with guide slide rods 355 with limit plates at the lower end. The guide slide rods 355 slide through the treatment tank 1. The lower end of the treatment tank 1 is also equipped with a pneumatic push rod 356. The telescopic end of the pneumatic push rod 356 slides through the treatment tank 1 and is fixedly connected to the blocking plate 353.

[0025] The opening and closing assembly 36 includes a connecting port located at the rear end of the oil separator 2, corresponding to the left side baffle 22 and the porous flow barrier 24. Several connecting ports are provided, and the ports are linearly and evenly distributed. The connecting ports are connected to the oil drain pipe 26. A receiving groove 361 is provided on the upper inner wall of the connecting port. An electromagnet 362 is embedded on the upper inner wall of the receiving groove 361. A magnetic sealing strip 363 is also slidably installed on the inner wall of the receiving groove 361 through a buffer spring. A flow-blocking weir 364 is installed on the lower inner wall of the connecting port corresponding to the magnetic sealing strip 363. The opposite ends of the magnetic sealing strip 363 and the flow-blocking weir 364 are designed with a concave-convex fit structure.

[0026] A microbubble generator 121 is installed on the inner wall of the bottom end of the air flotation chamber 12. A conveying pipe is installed through the rear end of the treatment tank 1 and is connected to the microbubble generator 121. An ultrasonic transducer 122 is symmetrically installed at the left end of the treatment tank 1 corresponding to the front and rear of the air flotation chamber 12. A slag discharge pipe 123 is connected to the upper side of the rear end of the treatment tank 1 corresponding to the air flotation chamber 12. A drain pipe 124 is connected to the lower side of the rear end of the treatment tank 1 corresponding to the air flotation chamber 12. An extension plate structure is integrally installed at the upper end of the drain pipe 124.

[0027] The slag removal section 4 includes a load-bearing plate 41 installed on the left end of the partition 352 on the right side and on the inner wall of the air flotation chamber 12. Several load-bearing plates 41 are installed, and the load-bearing plates 41 are evenly distributed in a rectangular shape. U-shaped push plates 42 are slidably installed on the opposite ends of the upper and lower load-bearing plates 41. A drive assembly 43 is provided on the treatment tank 1 and the U-shaped push plate 42. An opening and closing assembly 44 is provided on the drain pipe 124.

[0028] The drive assembly 43 includes a mounting base 431 installed on the upper end of the U-shaped push plate 42. Limiting slide rods 432 are symmetrically installed on the inner walls of the front and rear ends of the air flotation chamber 12. A lead screw 433 is rotatably installed through the front end of the treatment tank 1. The rear end of the lead screw 433 is rotatably connected to the inner wall of the treatment tank 1. A servo motor 434 for driving the lead screw 433 to rotate is installed at the front end of the treatment tank 1. The mounting base 431 is threaded to the lead screw 433 and simultaneously slides on the outer walls of the two limiting slide rods 432.

[0029] The second opening and closing assembly 44 includes a receiving groove 441 opened on the inner wall of the upper end of the slag discharge pipe 123. An electromagnet 442 is embedded in the inner wall of the upper end of the receiving groove 441. A magnetic sealing strip 443 is also slidably installed on the receiving groove 441 through a buffer spring. A flow-blocking weir 444 is installed on the inner wall of the lower end of the slag discharge pipe 123 corresponding to the magnetic sealing strip 443. The opposite ends of the magnetic sealing strip 443 and the flow-blocking weir 444 are designed with a concave-convex fit structure.

[0030] On the inner wall of the U-shaped opening of several U-shaped push plates 34, there are several sets of linearly and evenly distributed air holes 341. Each set of air holes 341 consists of several circumferentially distributed air holes 341. The front end of the left U-shaped push plate 34 is connected to a telescopic hose 342. The head and tail ends of the telescopic hose 342 are fixed through the oil separator 2 and the treatment tank 1 by sealing rings, respectively. The air holes 341 and the telescopic hose 342 are all connected to the internal air passage of the U-shaped push plate 34. The opposite ends of two adjacent U-shaped push plates 34 are provided with docking air holes, and the two adjacent U-shaped push plates 34 are connected to each other. A docking plate 343 with docking vents is also installed. The docking vents on the U-shaped push plate 34 and the docking plate 343 are interconnected. The inner wall of the U-shaped opening of the U-shaped push plate 42 also has several sets of linearly and evenly distributed vents 421. Each set of vents 421 consists of several circumferentially distributed vents 421. The front end of the U-shaped push plate 42 is connected to a telescopic hose 422. The head end and tail end of the telescopic hose 422 are fixed through the oil separator 2 and the treatment tank 1 by sealing rings, respectively. Several vents 421 and the telescopic hose 422 are connected to the internal air passage of the U-shaped push plate 42.

[0031] A drive shaft 111 is rotatably installed through the inner wall of the bottom of the acidification chamber 11 and the lower end of the oil separator 2. A turbine agitator 112 and a slanted wing agitator 113 are fixedly mounted on the upper and lower sides of the outer wall of the drive shaft 111, respectively. A support frame 114 is installed on the right end of the partition plate 352 and the inner wall of the acidification chamber 11. The support frame 114 is composed of an annular plate and several rectangular connecting plates evenly distributed around the circumference. A flow guide plate 115 is installed on the inner wall of the annular plate. The upper and lower ends of the flow guide plate 115 are both flared structures. A servo motor 116 for driving the drive shaft 111 to rotate is also installed at the lower end of the treatment tank 1. An acid replenishment pipe 117 is also connected to the front end of the treatment tank 1 corresponding to the upper side of the acidification chamber 11.

[0032] In practice: Firstly, this application is used for the pretreatment of phenolic sodium sulfate wastewater. Through the series combination of an oil separator 2, an acidification chamber 11, and an air flotation chamber 12, combined with mechanical stirring and mixing, microbubble flotation to remove suspended solids, and a synergistic cleaning structure of an oil-cleaning section 3 and a sludge-cleaning section 4, the problems of oil emulsification, suspended solids clogging, and uneven acid-base mixing in traditional pretreatment processes are avoided. Specifically, the oil-cleaning section 3, during the effluent stage of the acidification chamber 11, uses the lifting and lowering of the sealing plate 353 to drive the porous flow-blocking plate 24 and the connecting bracket 33, causing the U-shaped pusher plate 34 to scrape the floating oil in the oil separator 2 into the oil discharge pipe. 26. To prevent floating oil from entering the acidification chamber 11 and causing emulsification or affecting the quality of sodium sulfate recovery, the acidification chamber 11 is used to fully convert sodium phenolate into free phenol under the action of the acid replenishment pipe 117, turbine agitator 112, and oblique air-blade agitator 113. The air flotation chamber 12 is used to remove residual suspended solids and free phenol by flotation through microbubble generator 121 and ultrasonic transducer 122, thereby realizing the fully automated operation of the pretreatment process and ensuring that the wastewater retention time in the oil separator 2, acidification chamber 11, and air flotation chamber 12 is unified according to the step with the longest required time, ensuring continuous and stable operation.

[0033] In the initial setup and liquid level alignment of the equipment, the U-shaped opening of U-shaped push plate 34 corresponds to the surface of the floating oil layer in the oil separator 2, and the U-shaped opening of U-shaped push plate 42 corresponds to the surface of the scum layer in the flotation chamber 12. This ensures that the scraping of oil and scum can directly act on the floating oil and scum on the liquid surface, avoiding the scraping of the scraper without working or being submerged too deeply due to liquid level deviation, thus ensuring a stable and reliable removal effect of floating oil and scum.

[0034] In the influent and oil-water separation stage, the phenolic sodium sulfate wastewater first enters through the inlet at the left end of the oil separator 2. It first passes through the filter basket 23, which intercepts tar particles, fibrous debris, and larger suspended solids to prevent clogging by the subsequent porous baffles 24 and 25, and to alleviate the working pressure of the microbubble flotation. After passing through the filter basket 23, the wastewater forms a back-and-forth flow between the two sets of baffles 22, reducing the flow velocity. Oil droplets and suspended solids collide, coalesce, and undergo initial separation on the surface of the baffles 22. Subsequently, the wastewater flows sequentially through the porous baffles 24 and 25. The porous baffles 24 and 25 rectify the water flow, causing the small oil droplets to further coalesce into larger droplets and float to the surface to form a floating oil layer. Below the oil layer is an aqueous phase containing sodium phenolate sulfate. It should be noted that at this time, the lower end of the sealing plate 353 is always tightly attached to the inner wall of the bottom of the treatment tank 1, and the channel between the acidification chamber 11 and the air flotation chamber 12 is sealed. The wastewater in the oil separator 2 continuously enters the acidification chamber 11 through the outlet on the lower right side. The liquid level in the acidification chamber 11 gradually rises. Through the interception of large particles by the filter basket 23, the rectification and aggregation effect of the baffle plate 22 and the porous baffle plate 24 and the porous baffle plate 25, the initial separation of the floating oil and the aqueous phase is achieved, effectively preventing suspended solids from entering the subsequent acidification chamber 11 and clogging the stirring components. At the same time, the normal sealing of the sealing plate 353 ensures that the acidification chamber 11 has sufficient residence time, so that the effluent from the oil separator 2 can be continuously and stably supplied to the acidification chamber 11.

[0035] During the acidification and conversion stage, when the wastewater in the acidification chamber 11 reaches the set level, the outlet at the lower end of the oil separator 2 is closed by an external valve, stopping the wastewater from entering the acidification chamber 11. Simultaneously, the required standard amount of acid is added to the acidification chamber 11 via the acid replenishment pipe 117. Then, the drive shaft 111 is rotated by the servo motor 116, which in turn drives the turbine agitator 112 and the oblique-blade agitator 113 to rotate synchronously. The guide plate 115 is fixed inside the acidification chamber 11 by the support frame 114. Both ends of the guide plate 115 have a flared structure, allowing the wastewater to circulate forcefully inside and outside the guide plate 115, thus achieving rapid and uniform mixing of the acid and wastewater under acidic conditions. Sodium phenolate in the wastewater is converted into free phenol. At the same time, uniform stirring can prevent local over-acidification and emulsification, and avoid introducing impurities that affect the quality of sodium sulfate recovery. During this process, the sealing plate 353 remains closed. The residence time of wastewater in the acidification chamber 11 is unified with the residence time in the oil separator 2 and the flotation chamber 12 according to the step with the longest required time, to ensure that the acidification reaction is fully completed. Through the circulation guidance of the flow guide plate 115 and the forced mixing of the double-layer stirring paddle, the acid solution and wastewater are in uniform contact, the sodium phenolate is completely converted, and local over-acidification and emulsification are avoided. At the same time, the continuous sealing of the sealing plate 353 ensures the acidification reaction time, provides favorable conditions for subsequent flotation or extraction to remove phenol, and ensures that the quality of sodium sulfate recovery is not affected by impurities.

[0036] During the acidification and simultaneous oil removal stages, once the mixing reaction in the acidification chamber 11 reaches the set time, the telescopic end of the pneumatic push rod 356 extends upwards. The pneumatic push rod 356 drives the sealing plate 353 to move upwards between the two partitions 352. As the lower end of the sealing plate 353 gradually detaches from the inner wall of the bottom of the treatment tank 1, the channel between the acidification chamber 11 and the flotation chamber 12 gradually opens. The acidified wastewater enters the flotation chamber 12 from the acidification chamber 11 under gravity. At the same time, the sealing plate 353 will pass through... The connecting plate 354 drives the porous baffle plate 24 to slide upward synchronously along the inner wall of the rectangular sliding hole 351. Since the guide oblique hole 32 on the porous baffle plate 24 has a front-high and rear-low structure, during the upward movement of the porous baffle plate 24, the guide oblique hole 32 will push the connecting bracket 33 to slide backward along the limiting sliding hole 31. The connecting bracket 33 will simultaneously drive several U-shaped push plates 34 to slide backward synchronously. During this period, several U-shaped push plates 34 can scrape the floating oil on the liquid surface of the corresponding area of ​​the oil separator 2 towards the oil discharge pipe 26.

[0037] At this point, several electromagnets 362 need to be energized to generate magnetic attraction, causing the magnetic sealing strip 363 to slide upwards along the inner wall of the receiving groove 361 until it is fully retracted and magnetically connected to the corresponding electromagnet 362. This disengages the magnetic sealing strip 363 from the flow-blocking weir strip 364, opening the connection port. The floating oil can then enter the drain pipe 26 through the connection port and be discharged uniformly, where it will be received and processed by an external centralized processing device. In addition, the air holes 341 on several U-shaped push plates 34 can all introduce gas through the telescopic hose 342 and the docking plate 343, which will be used for oil scraping. During the process, an air curtain is formed, which promotes the demulsification of floating oil and its aggregation towards the oil discharge pipe 26, thereby improving the oil removal effect. The sealing plate 353 is opened by the pneumatic push rod 356, and the porous baffle plate 24 rises and the connecting bracket 33 moves backward, so as to realize the simultaneous acidification of water and the removal of floating oil in the oil separator 2, shortening the batch processing cycle. The inclined design of the guide hole 32, which is higher at the front and lower at the back, reliably converts the vertical lifting of the porous baffle plate 24 into the horizontal oil scraping motion of the U-shaped push plate 34. The air curtain further improves the efficiency of floating oil removal and effectively prevents floating oil from entering the air flotation chamber 12 and causing secondary pollution.

[0038] It should be noted that after the floating oil on the surface of the oil separator 2 is completely discharged, several electromagnets 362 need to be controlled again to switch the current direction to generate magnetic repulsion force, so that the magnetic sealing strip 363 slides down along the inner wall of the receiving groove 361 until it is fully extended, so that the magnetic sealing strip 363 and the flow-blocking weir strip 364 can resume their concave-convex fit and close the connection port.

[0039] In the flotation sludge removal stage, after the acidified wastewater enters the flotation chamber 12, the microbubble generator 121 needs to be controlled to generate a large number of microbubbles through the delivery pipe. The bubbles combine with free phenols, residual floating oil and fine suspended solids in the wastewater and are carried to the liquid surface to form sludge. At the same time, ultrasonic waves can be applied to the wastewater in the flotation chamber 12 through the ultrasonic transducer 122 to break the oil-water emulsion film and enhance the demulsification and flotation effect. After the wastewater sludge in the flotation chamber 12 floats to the liquid surface, the servo motor 434 continues to drive the lead screw 433 to rotate. The lead screw 433 slides the drive mounting base 431 backward along the outer wall of the left and right limit slide rods 432. The process pushes the scum on the wastewater surface towards the scum discharge pipe 123. During this process, the U-shaped pusher plate 42 slides between the upper and lower load-bearing plates 41 to achieve a limiting and stabilizing effect. Similarly, the air holes 421 on the U-shaped pusher plate 42 can also introduce gas through the telescopic hose 422, forming an air curtain inside the U-shaped opening of the U-shaped pusher plate 42 to assist in the aggregation and scraping of scum. The combined action of microbubble flotation and ultrasonic waves can efficiently remove residual free phenols and suspended solids in the acidified wastewater, reducing the load of subsequent phenol removal treatment. By combining mechanical scum removal with air curtain assistance, the scum removal efficiency is improved, and the accumulation of scum in the flotation chamber 12 is prevented from affecting the quality of the effluent. During the scum discharge and clear water discharge stages, when the scum is pushed to the scum discharge pipe 123, the electromagnet 442 is energized to generate magnetic attraction, causing the magnetic sealing strip 443 to slide upwards along the inner wall of the receiving groove 441 until it is fully retracted and magnetically connected to the corresponding electromagnet 442. This disengages the magnetic sealing strip 443 from the flow-blocking weir strip 444, changing it from a closed state to an open state. The floating oil can then enter the scum discharge pipe 123 for unified discharge and is received and processed by an external centralized treatment device. Next, the drain pipe 124 is opened through the external valve, and the treated clean water can be discharged from the drain pipe 124 on the lower side of the flotation chamber 12. At this point, the phenol-containing sodium sulfate wastewater has completed pretreatment. The effluent enters the subsequent deep treatment processes such as extraction, adsorption or evaporation crystallization. The wastewater retention time in the oil separator 2, acidification chamber 11 and flotation chamber 12 is unified according to the step with the longest required time, ensuring that the liquid level and flow rate of each chamber are matched during continuous operation of the entire pretreatment system, avoiding short-circuiting or overflow. Furthermore, through the sealing and opening of the slag discharge pipe 123 and the extension plate structure of the drain pipe 124, the scum and clean water are completely separated, and the effluent water quality is stable, providing high-quality influent for subsequent phenol removal and sodium sulfate recovery.

[0040] During the continuous operation of the equipment and the batch switching of wastewater, it is worth emphasizing that after the wastewater enters the acidification chamber 11 from the oil separator 2, it continues to carry out residual oil-water separation. When the liquid level in the acidification chamber 11 reaches the set value, the water intake stops. Subsequently, before the wastewater enters the flotation chamber 12 from the acidification chamber 11, the flotation chamber 12 is in an empty state to ensure that the hydraulic residence time of each batch of flotation treatment is consistent and to avoid mixing of different batches of wastewater and affecting the treatment effect.

[0041] In this application, both the oil removal section 3 and the sludge removal section 4 adopt a cleaning method that combines mechanical scrapers and air curtains. The acidification chamber 11 and the flotation chamber 12 achieve batch transfer of wastewater and simultaneous scraping of floating oil through the linkage control of the sealing plate 353. The series layout of the oil separator 2, the acidification chamber 11 and the flotation chamber 12 enables the step-by-step removal of floating oil, suspended solids and phenolic substances. The entire pretreatment process can effectively prevent emulsification, clogging and evaporation coking, and avoid introducing impurities that affect the quality of sodium sulfate recovery. The equipment has a compact structure and can flexibly adjust the retention time and acid dosage according to the water quality and quantity of different phenol-containing sodium sulfate wastewater, and has good versatility and economy.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wastewater treatment device for sodium sulfate containing phenol, characterized in that, include: The treatment tank (1) has an oil separator (2) installed on the upper side of the inner wall of the treatment tank (1). The cavity located at the lower end of the oil separator (2) in the treatment tank (1) is divided into an air flotation chamber (12) and an acidification chamber (11) in the left and right directions. The treatment tank (1) and the oil separator (2) are both equipped with an oil cleaning section (3). The air flotation chamber (12) is equipped with a slag cleaning section (4). The inner wall of the oil separator (2) is provided with two sets of baffles (22) evenly distributed in the left and right. Each set of baffles (22) consists of two baffles (22) arranged alternately in the left and right. A porous baffle plate (24) is slidably installed in the middle of the inner wall of the oil separator (2). The oil cleaning section (3) includes two upper baffles (22) with limiting sliding holes (31) on the lower side. A guide oblique hole (32) is provided in the middle of the left end of the multi-hole baffle (24). A connecting bracket (33) is slidably installed on the inner wall of the limiting sliding hole (31) and the guide oblique hole (32). The connecting bracket (33) is composed of two left and right connecting rods and a U-shaped sliding sleeve. The U-shaped sliding sleeve is slidably fitted on the corresponding baffle (22). On the outer wall of the connecting bracket (33), U-shaped push plates (34) are fixedly fitted on the left and right sides of the multi-hole baffle (24). The left and right ends of the U-shaped push plates (34) are slidably attached to the multi-hole baffle (24) or the corresponding baffle (22). A drive group (35) is provided on the treatment tank (1) and the multi-hole baffle (24). An opening and closing group (36) is provided on the oil discharge pipe (26).

2. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 1, characterized in that: The oil separator (2) has an inlet at the left end and an outlet connected to the acidification chamber (11) at the lower right side. The oil separator (2) has a cover plate (21) that can be detachably installed at the upper end. A filter basket (23) is placed on the inner wall of the left end of the oil separator (2) and the baffle plate (22) on the left side through a rectangular strip. A porous baffle plate (25) is installed on the right side of the inner wall of the oil separator (2). An oil drain pipe (26) is connected to the position of the back end of the treatment tank (1) corresponding to the upper side of the baffle plate (22) and the porous baffle plate (24) on the left side.

3. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 2, characterized in that: The drive assembly (35) includes a rectangular sliding hole (351) located at the lower end of the oil separator (2) corresponding to the porous baffle plate (24). The inner wall of the treatment tank (1) and the lower end of the oil separator (2) corresponding to the rectangular sliding hole (351) are symmetrically installed with baffles (352) on both sides. The outer wall of the porous baffle plate (24) slides against the inner wall of the rectangular sliding hole (351) and the opposite end faces of the two baffles (352). A sealing plate (353) is slidably installed between the two baffles (352) on the lower side. The sealing plate (353) is a T-shaped structure. The upper end of the sealing plate (353) is equipped with a connecting plate (354) that is fixedly connected to the porous baffle plate (24). The lower end of the sealing plate (353) is symmetrically equipped with guide slide rods (355) with limit plates at the lower end. The guide slide rods (355) slide through the treatment pool (1). The lower end of the treatment pool (1) is also equipped with a pneumatic push rod (356). The telescopic end of the pneumatic push rod (356) slides through the treatment pool (1) and is fixedly connected to the sealing plate (353).

4. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 2, characterized in that: The opening and closing assembly (36) includes a connecting port located at the rear end of the oil separator (2) corresponding to the left side baffle (22) and the porous flow barrier (24). There are several connecting ports, which are linearly and evenly distributed. The connecting ports are connected to the oil drain pipe (26). A receiving groove (361) is provided on the inner wall of the upper end of the connecting port. An electromagnet (362) is embedded on the inner wall of the upper end of the receiving groove (361). A magnetic sealing strip (363) is also slidably installed on the inner wall of the receiving groove (361) through a buffer spring. A flow barrier strip (364) is installed on the inner wall of the bottom end of the connecting port corresponding to the magnetic sealing strip (363). The opposite ends of the magnetic sealing strip (363) and the flow barrier strip (364) are designed with a concave-convex fit structure.

5. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 3, characterized in that: A microbubble generator (121) is installed on the inner wall of the bottom end of the air flotation chamber (12). A conveying pipe is installed through the rear end of the treatment tank (1) and is connected to the microbubble generator (121). An ultrasonic transducer (122) is symmetrically installed at the left end of the treatment tank (1) corresponding to the front and rear of the air flotation chamber (12). A slag discharge pipe (123) is connected to the upper side of the rear end of the treatment tank (1) corresponding to the air flotation chamber (12). A drain pipe (124) is connected to the lower side of the rear end of the treatment tank (1) corresponding to the air flotation chamber (12). An extension plate structure is integrally installed at the upper end of the drain pipe (124).

6. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 5, characterized in that: The slag removal section (4) includes a load-bearing plate (41) installed on the left end of the partition (352) on the right side and on the inner wall of the air flotation chamber (12). Several load-bearing plates (41) are installed, and the load-bearing plates (41) are evenly distributed in a rectangular shape. U-shaped push plates (42) are slidably installed on the opposite ends of the upper and lower load-bearing plates (41). A drive group (43) is provided on the treatment tank (1) and the U-shaped push plate (42). An opening and closing group (44) is provided on the drain pipe (124).

7. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 6, characterized in that: The second drive unit (43) includes a mounting base (431) installed on the upper end of the second U-shaped push plate (42). Limiting slide rods (432) are symmetrically installed on the inner walls of the front and rear ends of the air flotation chamber (12). A lead screw (433) is rotatably installed through the front end of the treatment tank (1). The rear end of the lead screw (433) is rotatably connected to the inner wall of the treatment tank (1). A servo motor (434) for driving the lead screw (433) to rotate is installed at the front end of the treatment tank (1). The mounting base (431) is threaded to the lead screw (433) and simultaneously slidably sleeved on the outer walls of the two limiting slide rods (432).

8. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 6, characterized in that: The second opening and closing assembly (44) includes a receiving groove (441) opened on the inner wall of the upper end of the slag discharge pipe (123). An electromagnet (442) is embedded on the inner wall of the upper end of the receiving groove (441). A magnetic sealing strip (443) is also slidably installed on the receiving groove (441) through a buffer spring. A flow-blocking weir (444) is installed on the inner wall of the bottom end of the slag discharge pipe (123) corresponding to the magnetic sealing strip (443). The opposite ends of the magnetic sealing strip (443) and the flow-blocking weir (444) are designed with a concave-convex fit structure.

9. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 5, characterized in that: On the inner wall of the U-shaped opening of each of the U-shaped push plates (34), there are several sets of linearly and evenly distributed air holes (341). Each set of air holes (341) consists of several circumferentially distributed air holes (341). The front end of the left U-shaped push plate (34) is connected to a telescopic hose (342). The head and tail ends of the telescopic hose (342) are fixed through the oil separator (2) and the treatment tank (1) by sealing rings, respectively. Several air holes (341) and telescopic hoses (342) are connected to the internal air passage of the U-shaped push plate (34). The opposite ends of two adjacent U-shaped push plates (34) are provided with connecting air holes, and there are connecting air holes between two adjacent U-shaped push plates (34). A docking plate (343) with docking vents is also installed. The docking vents on the U-shaped push plate (34) and the docking plate (343) are interconnected. The inner wall of the U-shaped opening of the U-shaped push plate (42) also has several sets of linearly and evenly distributed vents (421). Each set of vents (421) consists of several circumferentially distributed vents (421). The front end of the U-shaped push plate (42) is connected to a telescopic hose (422). The head end and tail end of the telescopic hose (422) are fixed through the oil separator (2) and the treatment tank (1) respectively by sealing rings. Several vents (421) and the telescopic hose (422) are all connected to the internal air passage of the U-shaped push plate (42).

10. The phenol-containing sodium sulfate wastewater treatment equipment according to claim 3, characterized in that: The bottom inner wall of the acidification chamber (11) and the lower end of the oil separator (2) are connected to a drive shaft (111) that rotates through the chamber. The upper and lower sides of the outer wall of the drive shaft (111) are respectively fixed with a turbine agitator (112) and a slanted wing agitator (113). The right end of the partition plate (352) on the right side and the inner wall of the acidification chamber (11) are connected to a support frame (114). The support frame (114) is composed of an annular plate and several rectangular connecting plates evenly distributed around the circumference. A flow guide plate (115) is installed on the inner wall of the annular plate. The upper and lower ends of the flow guide plate (115) are both flared structures. A servo motor (116) for driving the drive shaft (111) to rotate is also installed at the lower end of the treatment tank (1). The front end of the treatment tank (1) is connected to the upper side of the acidification chamber (111) via an acid replenishment pipe (117).

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