A treatment process for phenolic resin industrial wastewater

Abstract

The present invention belongs to the technical field of wastewater treatment, and in particular, relates to a treatment process for phenolic resin industrial wastewater, which comprises the following steps: S1: pretreatment: the collected industrial wastewater is introduced into a grid pool, and then a flocculant is added into a coagulation sedimentation device to promote the coagulation of suspended matter and form particles that are easy to precipitate for precipitation; S2: multi-stage biological enhancement treatment; S3: membrane separation deep treatment; S4: reuse and discharge; wherein, the coagulation sedimentation device in step S1 comprises a flocculation tank and a sedimentation tank body, the sedimentation tank body is provided with a plurality of inclined plate bodies, the plurality of inclined plate bodies are movably installed in the sedimentation tank body through a swing adjustment mechanism, a sewage tank is provided at the bottom of the sedimentation tank body, an overflow weir is provided in the sedimentation tank body, and the overflow weir is located above the inclined plate body, a drainage trough is provided on one side of the sedimentation tank body, and the drainage trough is connected with the overflow weir; the present invention can improve the precipitation treatment effect of colloids and suspended matter after flocculation in wastewater.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment process for phenolic resin industrial wastewater. Background Art

[0002] Phenolic resin is synthesized from phenols and aldehydes under the catalytic action of acid or alkali. The phenolic resin synthesized by the reaction contains a large amount of water after its generation and needs to be dehydrated. Its wastewater cannot be directly sent to the sewage treatment plant for treatment and needs to be pre-treated before entering the sewage treatment plant. If these wastewaters are discharged directly without treatment, it will cause serious environmental problems.

[0003] When treating the industrial wastewater generated by the existing phenolic resin processing, it is mostly necessary to pre-treat and chemically treat the industrial wastewater first, so that the colloids and suspended matter in the industrial wastewater can be flocculated and precipitated, so as to effectively remove some of the suspended matter and colloids in the industrial wastewater. The flocculation and sedimentation equipment used in the chemical treatment step in the existing industrial wastewater treatment process mostly connects the inclined plate sedimentation tank on one side of the flocculation tank. Since the inclined plate bodies in the inclined plate sedimentation tank are mostly fixed, it will not only have a certain impact on the sludge precipitation in the sedimentation tank, but also several inclined plates are mostly fixed in the inclined plate sedimentation tank. Therefore, it is difficult to disassemble and replace the damaged inclined plate bodies, which will further affect the rapid sedimentation effect of the inclined plate sedimentation tank on the flocculated wastewater. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention is a process for treating phenolic resin industrial wastewater, which comprises the following steps:

[0006] S1: Pretreatment: the collected phenolic resin industrial wastewater is passed into the grid pool to remove large particles of debris in the wastewater; alkaline substances are added to adjust the pH to neutral or slightly acidic, and then flocculants are added to the coagulation and sedimentation equipment to promote the coagulation of suspended matter and form particles that are easy to precipitate for precipitation;

[0007] S2: Multi-stage bio-enhanced treatment, using the first-stage anaerobic reactor, the second-stage anaerobic reactor and the aerobic bio-enhanced reactor to treat the precipitated wastewater in multi-stage bio-enhanced treatment;

[0008] S3: Membrane separation deep treatment, the discharged water is sent to the ultrafiltration membrane system, the membrane pore size is 0.01-0.1μm, and the ultrafiltration effluent is sent to the reverse osmosis membrane system;

[0009] S4: Reuse and discharge. Treated water can be used as cooling water or cleaning water in the production process; wastewater that meets the discharge standards can be safely discharged;

[0010] Among them, the coagulation and sedimentation equipment in step S1 includes a flocculation tank and a sedimentation tank body, a plurality of inclined plate bodies are provided in the sedimentation tank body, and the plurality of inclined plate bodies are movably installed in the sedimentation tank body through a swing adjustment mechanism, a sewage tank is provided at the bottom of the sedimentation tank body, an overflow weir is provided in the sedimentation tank body, and the overflow weir is located above the inclined plate body, a drainage trough is provided on one side of the sedimentation tank body, and the drainage trough is connected to the overflow weir.

[0011] The cam is provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels respectively.

[0012] Furthermore, the swing adjustment mechanism also includes gears, racks and hydraulic cylinders. Gears are sleeved on the outside of several positioning columns rotatably installed on the other side wall of the sedimentation tank body. Several gears are meshed with the same rack. A hydraulic cylinder is vertically fixed on the other side wall of the sedimentation tank body, and the piston rod of the hydraulic cylinder is connected to the rack.

[0013] Furthermore, a driving screw is connected between the two rotating shaft rods, and a screw slider is sleeved on the driving screw, and the two rotating shaft rods are rotatably connected to the two ends of the sleeve, the screw slider is located in the sleeve, the inner wall of the sleeve is insulated and provided with an electromagnetic suction strip, the outer ring surface of the screw slider is insulated and provided with a metal ring, the metal ring is in contact with the electromagnetic suction strip, the sleeve is provided with a through slide groove along its length direction, a support slider is slidably provided in the through slide groove, an elastic scraper is provided between the two adjacent inclined plate bodies, and the side wall of the elastic scraper is connected to the support slider.

[0014] Furthermore, the sewage tank is designed as a wave-shaped structure, and sewage discharge mechanisms are provided in multiple troughs of the sewage tank. The sewage discharge mechanism includes a drive shaft, a spiral blade, a synchronous pulley assembly and a sewage pipe. A drive shaft is rotatably installed in each trough of the sewage tank through a bearing, and a spiral blade is sleeved on each drive shaft. The outer ends of multiple drive shafts extend out of the sewage tank and are connected to each other through a synchronous pulley assembly. The ends of multiple troughs of the sewage tank are connected to sewage pipes.

[0015] Furthermore, the sewage discharge mechanism also includes an elastic net, a protrusion and a drain pipe. An elastic net is suspended in each trough of the sewage discharge pool. The sewage discharge pipe is located above the elastic net. A plurality of protrusions are fixed on the spiral ring surface of the spiral blade. The plurality of protrusions are in rotational and extrusion contact with the elastic net. The bottom of the trough end surface of the sewage discharge pool is connected to a drain pipe.

[0016] Furthermore, the outer side surfaces of the inclined plate bodies close to the two side walls of the sedimentation tank body are provided with cavity bladder plates, and the cavity bladder plates are connected to the tank walls of the sedimentation tank body.

[0017] Furthermore, each of the through-slide grooves is provided with a segmented elastic sealing membrane, and two ends of each segment of the elastic sealing membrane are respectively connected to the supporting sliding block and the groove wall of the through-slide groove.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention movably installs a plurality of inclined plates in a sedimentation tank body through a swing adjustment mechanism. The swing adjustment mechanism can synchronously adjust the plurality of inclined plates to swing at an optimal tilt angle in the sedimentation tank body, thereby increasing the sedimentation area of ​​the plurality of inclined plates for wastewater without affecting the sludge discharge of the plurality of inclined plates, thereby improving the sedimentation treatment effect of colloids and suspended matter after flocculation in wastewater.

[0020] 2. Since several inclined plates are movably installed in the sedimentation tank body through a swing adjustment mechanism, several inclined plates can be taken out of the sedimentation tank body for maintenance regularly to prevent the inclined plates from being damaged and affecting the sedimentation treatment effect of the wastewater in the sedimentation tank body. The swing adjustment mechanism can adjust several inclined plates to a vertical state, which is convenient for cleaning the sediment adhered to the inclined plates and prevents a large amount of sediment adhered to the inclined plates, which will cause the flow gap between the two inclined plates to be reduced or blocked, which will further affect the rapid sedimentation effect of the inclined plate sedimentation tank on wastewater.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a coagulation and sedimentation device in an embodiment disclosed in the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of the sedimentation tank body in the disclosed embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of several inclined plate bodies in the disclosed embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the missing oral cavity in the disclosed embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the elastic scraper in the disclosed embodiment of the present invention;

[0028] Figure 6 A cross-sectional view of an elastic scraper in an embodiment disclosed in the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the sewage tank in the disclosed embodiment of the present invention.

[0030] In the figure: 1. Flocculation tank;

[0031] 2. Sedimentation tank body;

[0032] 3. Oblique plate body; 31. Cavity cyst plate;

[0033] 4. Swing adjustment mechanism; 41. Positioning column; 411. Lack cavity; 42. Sleeve; 421. Electromagnetic suction strip; 422. Through slide groove; 43. Rotating shaft rod; 44. Bolt; 45. Guide sleeve; 46. Elastic rod; 47. Gear; 48. Rack; 49. Hydraulic cylinder; 491. Drive screw; 492. Screw slider; 493. Metal ring; 494. Support slider;

[0034] 5. Elastic scraper;

[0035] 6. Sewage tank;

[0036] 7. Overflow weir; 71. Drainage trough;

[0037] 8. sewage discharge mechanism; 81. driving shaft; 82. spiral blade; 83. synchronous pulley assembly; 84. sewage discharge pipe; 85. elastic net; 86. bump; 87. drainage pipe. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] See also Figure 1-Figure 7 As shown, the present invention is a process for treating phenolic resin industrial wastewater, which comprises the following steps:

[0041] S1: Pretreatment: the collected phenolic resin industrial wastewater is passed into the grid pool to remove large particles of debris in the wastewater; alkaline substances are added to adjust the pH to neutral or slightly acidic, and then flocculants are added to the coagulation and sedimentation equipment to promote the coagulation of suspended matter and form particles that are easy to precipitate for precipitation;

[0042] S2: Multi-stage bio-enhanced treatment, using the first-stage anaerobic reactor, the second-stage anaerobic reactor and the aerobic bio-enhanced reactor to treat the precipitated wastewater in multi-stage bio-enhanced treatment;

[0043] S3: Membrane separation deep treatment, the discharged water is sent to the ultrafiltration membrane system, the membrane pore size is 0.01-0.1μm, and the ultrafiltration effluent is sent to the reverse osmosis membrane system;

[0044] S4: Reuse and discharge. Treated water can be used as cooling water or cleaning water in the production process; wastewater that meets the discharge standards can be safely discharged;

[0045] The coagulation sedimentation equipment includes a flocculation tank 1 and a sedimentation tank body 2, wherein a plurality of inclined plate bodies 3 are arranged in the sedimentation tank body 2, and the plurality of inclined plate bodies 3 are movably installed in the sedimentation tank body 2 through a swing adjustment mechanism 4, a sewage tank 6 is arranged at the bottom of the sedimentation tank body 2, an overflow weir 7 is arranged in the sedimentation tank body 2, and the overflow weir 7 is located above the inclined plate body 3, a drainage groove 71 is arranged on one side of the sedimentation tank body 2, and the drainage groove 71 is connected to the overflow weir 7;

[0046] Specifically, the present invention movably installs a plurality of inclined plate bodies 3 in the sedimentation tank body 2 through a swing adjustment mechanism 4. The wastewater filtered by the grid tank will first enter the flocculation tank 1, and a certain amount of flocculant will be added to the flocculation tank 1, and then mixed through the internal stirring mechanism. Then, according to the type of colloid or flocculated suspended matter to be precipitated as needed, the inclination angle of the plurality of inclined plate bodies 3 in the sedimentation tank body 2 is adjusted by the swing adjustment mechanism 4, so that the plurality of inclined plate bodies 3 are synchronously adjusted to swing to the optimal inclination angle in the sedimentation tank body 2. For example, at the beginning of wastewater sedimentation, the inclination angle of the plurality of inclined plate bodies 3 can be adjusted between 35° and 50°. At this time, the inclination angle of the inclined plate body 3 is small, the sedimentation area is increased, and the sedimentation efficiency is also improved. As the sedimentation time increases, in order to improve the smoothness of sludge discharge, the inclination angle of the plurality of inclined plate bodies 3 can be adjusted to about 60° to achieve It is now found that most of the inclined plate bodies 3 have good sedimentation efficiency, and then the mixed wastewater will flow into the sedimentation tank body 2, and the colloid and flocculated suspended matter will be precipitated by the swing-adjusted inclined plate body 3 and fall into the sedimentation tank body 2 below, while the clean water will flow into the drainage trough 71 through multiple overflow weirs 7. Since the several inclined plate bodies 3 are movably installed in the sedimentation tank body 2 through the swing adjustment mechanism 4, the several inclined plate bodies 3 can be regularly taken out of the sedimentation tank body 2 for maintenance to prevent the inclined plate body 3 from being damaged and affecting the sedimentation treatment effect of the wastewater in the sedimentation tank body 2. At the same time, the swing adjustment mechanism 4 can adjust the several inclined plate bodies 3 to a vertical state, which is convenient for cleaning the sediment adhered to the inclined plate body 3, and prevent the sediment adhered to the inclined plate body 3 from being too much, which will cause the flow gap between the two inclined plate bodies 3 to be reduced or blocked, which will further affect the rapid sedimentation effect of the inclined plate sedimentation tank on wastewater.

[0047] In the scheme designed by the present invention, the swing adjustment mechanism 4 includes a positioning column 41, a sleeve 42, a rotating shaft rod 43, a bolt 44, a guide sleeve 45 and an elastic rod 46. A plurality of the positioning columns 41 are rotatably installed on the two side walls of the sedimentation tank body 2 through a rotating sleeve. A notch cavity 411 is opened at the end of the positioning column 41 located inside the sedimentation tank body 2. A plurality of the bottom ends of the inclined plate bodies 3 are fixed with a sleeve 42, and a rotating shaft rod 43 is arranged in the sleeve 42. The two ends of the rotating shaft rod 43 extend out of the sleeve 42 and engage with the notch cavity 411. The two ends of the rotating shaft rod 43 A threaded hole is formed in each of the positioning columns 41. A threaded hole is also formed inside the positioning column 41. A bolt 44 is threadedly connected to the outer end of the positioning column 41, and the tail end of the bolt 44 is connected to the threaded hole formed on the rotating shaft rod 43. The positioning columns 41 rotatably mounted on one side wall of the sedimentation tank body 2 are connected by an external synchronous pulley assembly 83. The upper ends of the inclined plate bodies 3 are provided with guide sleeves 45. The same elastic rod 46 is inserted into the guide sleeves 45 on the same axis, and nuts are connected to the two ends of the elastic rod 46.

[0048] Specifically, when it is necessary to install several inclined plate bodies 3 into the sedimentation tank body 2, the elastic rods 46 are first inserted into several guide sleeves 45 located on the same axis in sequence, and then the two ends of the elastic rods 46 are fixed by nuts, and then several vertical inclined plate bodies 3 are inserted into the sedimentation tank body 2, so that the rotating shaft rods 43 on both sides of the bottom end of the inclined plate body 3 are aligned with the notch 411 opened on the positioning columns 41 inside the pool wall on the front and rear sides of the sedimentation tank body 2. When the inclined plate body 3 is lowered to the specified position, the rotating shaft rod 43 will be inserted into the notch 411. After the bodies 3 are inserted into the notches 411 opened on the multiple sets of symmetrical positioning columns 41 through the multiple sets of symmetrical rotating shaft rods 43, the operator then turns the bolts 44 at the outer ends of the positioning columns 41 in sequence, so that the inner ends of the bolts 44 are threadedly connected to the threaded holes opened on the rotating shaft rods 43, and then the multiple inclined plate bodies 3 can be suspended and installed in the sedimentation tank body 2. When it is necessary to adjust the inclination angles of several inclined plate bodies 3, the servo motor fixed on the rear side of the sedimentation tank body 2 is controlled to work, so that it drives the synchronous pulley assembly 83 to rotate through the output shaft, and then drives the multiple positioning columns 41 to rotate synchronously Since the plurality of positioning posts 41 are sealed and rotatably mounted on the wall of the sedimentation tank body 2, they will drive the plurality of vertical inclined plate bodies 3 to swing to an inclined state, thereby facilitating the sedimentation treatment of the wastewater flowing into the sedimentation tank body 2. When the plurality of inclined plate bodies 3 tilt and swing, since the plurality of inclined plate bodies 3 are interconnected by elastic rods 46, the normal tilt and swing adjustment of the inclined plate bodies 3 will not be affected. When the inclined plate bodies 3 need to be disassembled for maintenance, the output shaft of the servo motor will drive the plurality of positioning posts 41 to rotate synchronously in the forward and reverse directions through the synchronous pulley assembly 83, so that the plurality of inclined plate bodies 3 can be adjusted in the forward and reverse directions. The inclined plate bodies 3 are tilted and swung back and forth in the sedimentation tank body 2, and the sediment adhered to the surface thereof can be swung away. Then, several inclined plate bodies 3 are controlled to rotate to a vertical state, and the bolts 44 outside the plurality of positioning columns 41 are twisted in reverse to disengage them from the threaded holes at the ends of the rotating shaft rods 43, so that the plurality of inclined plate bodies 3 can be synchronously and quickly pulled out of the sedimentation tank body 2 for maintenance or replacement, thereby speeding up the installation, disassembly and replacement efficiency of the plurality of inclined plate bodies 3, thereby further improving the rapid precipitation effect of the inclined plate sedimentation tank on colloids and suspended matter in industrial wastewater in the industrial wastewater treatment process.

[0049] In the solution designed by the present invention, the swing adjustment mechanism 4 also includes a gear 47, a rack 48 and a hydraulic cylinder 49. The outer parts of the plurality of positioning columns 41 rotatably mounted on the other side wall of the sedimentation tank body 2 are sleeved with gears 47, and the plurality of gears 47 are meshed with the same rack 48. The other side wall of the sedimentation tank body 2 is vertically fixed with a hydraulic cylinder 49, and the piston rod of the hydraulic cylinder 49 is connected to the rack 48.

[0050] Specifically, when the plurality of inclined plate bodies 3 to be installed are swung, it is necessary to control the piston rod of the hydraulic cylinder 49 to be retracted, so that it drives the rack 48 to slide downward and disengage from the meshing with the plurality of gears 47, thereby facilitating the plurality of positioning columns 41 to drive the plurality of inclined plate bodies 3 to swing at a certain angle in the sedimentation tank body 2, and then control the piston rod of the hydraulic cylinder 49 to extend, so that it drives the rack 48 to move up and down and mesh synchronously with the plurality of gears 47, thereby meshing and fixing the plurality of gears 47, and preventing the plurality of inclined plate bodies 3 after the swing adjustment from shaking or tilting under the impact of wastewater. Phenomenon, thereby affecting the rapid sedimentation effect of the several inclined plate bodies 3 on the sediment in the wastewater after the angle adjustment. At the same time, when it is necessary to rotate multiple bolts 44 to make them disengage from the threaded holes at the ends of the rotating shaft rod 43, the piston rod of the hydraulic cylinder 49 can be driven to extend to push the rack 48 to engage with multiple gears 47, so as to fix the multiple positioning columns 41, and then the positioning columns 41 will not rotate on the torsion bolts 44, and the rotating shaft rod 43 can be quickly disconnected from the positioning columns 41, so that the several inclined plate bodies 3 can be quickly disassembled and repaired from the sedimentation tank body 2.

[0051] In the scheme designed by the present invention, a driving screw 491 is connected between the two rotating shaft rods 43, and a screw slider 492 is sleeved on the driving screw 491, and the two rotating shaft rods 43 are rotatably connected with the two ends of the sleeve 42, the screw slider 492 is located in the sleeve 42, the inner wall of the sleeve 42 is insulated and provided with an electromagnetic suction strip 421, the outer ring surface of the screw slider 492 is insulated and provided with a metal ring 493, the metal ring 493 is in contact with the electromagnetic suction strip 421, the sleeve 42 is provided with a through slide groove 422 along its length direction, a support slider 494 is slidably provided in the through slide groove 422, an elastic scraper 5 is provided between the two adjacent inclined plate bodies 3, and the side wall of the elastic scraper 5 is connected to the support slider 494;

[0052] Specifically, when it is necessary to regularly scrape and clean the sediment accumulated and adhered on the surfaces of several inclined plate bodies 3, at this time, several inclined plate bodies 3 are controlled to swing to a vertical state, and then the electromagnetic suction strip 421 in the sleeve 42 is controlled to be powered off, so that it loses its magnetic adsorption force and breaks away from the adsorption and fixation of the metal ring 493, so that the sleeve 42 is separated from the fixed connection with the shaft rod 43, and then the continued rotation of the positioning column 41 will drive the driving screw 491 to rotate through the shaft rod 43, so that the screw slider 492 will drive the elastic scraper 5 to slide horizontally back and forth between two adjacent vertical inclined plate bodies 3 through the supporting slider 494, so as to facilitate the rapid scraping and cleaning of the sediment adhered to the surface of the inclined plate body 3, and prevent the excessive sediment adhered to the inclined plate body 3 from causing blockage. When the inclined plate body 3 continues to be in an inclined state for wastewater sedimentation, The elastic scraper 5 moves to the side wall close to the sedimentation tank body 2 so that it will not interfere with the flow path between the inclined plate bodies 3, and then the electromagnetic suction strip 421 is controlled to be energized so that it has a magnetic adsorption force to adsorb and fix the insulated metal ring 493, and then the rotation of the positioning column 41 will drive the adsorption and fixing sleeve 42 to rotate synchronously through the rotating shaft rod 43, so as to facilitate the adjustment of the inclination angle of several inclined plate bodies 3. Since the elastic scraper 5 is located between two adjacent inclined plate bodies 3, it will not interfere with the normal swinging adjustment of the inclined plate body 3 in the sedimentation tank body 2; and when several inclined plate bodies 3 are rotated to a vertical state and multiple bolts 44 are disengaged from the threaded holes of the rotating shaft rod 43, at this time, several inclined plate bodies 3 are pulled out from the sedimentation tank body 2, which will drive multiple elastic scrapers 5 to be pulled out synchronously, and will not affect the normal disassembly and installation of multiple inclined plate bodies 3.

[0053] In the scheme designed by the present invention, the sewage tank 6 is designed as a wave-shaped structure, and a sewage discharge mechanism 8 is provided in multiple troughs of the sewage tank 6. The sewage discharge mechanism 8 includes a drive shaft 81, a spiral blade 82, a synchronous pulley assembly 83 and a sewage discharge pipe 84. A drive shaft 81 is rotatably installed in each trough of the sewage tank 6 through a bearing, and a spiral blade 82 is sleeved on each drive shaft 81. The outer ends of multiple drive shafts 81 extend out of the sewage tank 6 and are mutually connected through the synchronous pulley assembly 83. The ends of multiple troughs of the sewage tank 6 are connected to the sewage discharge pipe 84;

[0054] Specifically, when it is necessary to discharge the sludge accumulated at the bottom of the sewage tank 6, the servo motor on the back of the sewage tank 6 is started to drive one of the drive shafts 81 to rotate through the output shaft, and then the synchronous pulley assembly 83 will drive multiple drive shafts 81 to rotate synchronously, and the spiral blades 82 rotate in the trough of the wave-shaped sewage tank 6, and the sludge accumulated in the trough will be quickly discharged through the open connected sewage pipe 84. The sewage tank 6 adopts a wavy structure design, which can make the sludge falling into the sewage tank 6 accurately and quickly slide into the trough. At the same time, the sewage discharge mechanism 8 is horizontally arranged in the sewage tank 6, so that it will not interfere with the normal tilt adjustment of several inclined plates 3, and can speed up the discharge efficiency of the sludge collected in the sewage tank 6 of the wavy line.

[0055] In the scheme designed by the present invention, the sewage discharge mechanism 8 also includes an elastic net 85, a protrusion 86 and a drain pipe 87. An elastic net 85 is suspended in each trough of the sewage discharge tank 6. The sewage discharge pipe 84 is located above the elastic net 85. A plurality of protrusions 86 are fixed on the spiral ring surface of the spiral blade 82. The plurality of protrusions 86 are in rotational and extrusion contact with the elastic net 85. The bottom of the trough end surface of the sewage discharge tank 6 is connected to the drain pipe 87. Specifically, when the sludge in the trough needs to be discharged, the sewage discharge tank 6 enters the drain pipe 87. A small amount of wastewater mixed with the sludge in the trough will be filtered by the elastic net 85 to the bottom of the trough of the sewage tank 6, and discharged through the drain pipe 87, so that the small amount of wastewater mixed in the sludge can be preliminarily dehydrated. As the spiral blade 82 continues to rotate, the protrusion 86 on its outer ring surface will squeeze the elastic net 85, causing the elastic net 85 to vibrate, which can not only accelerate the separation of wastewater in the sludge, but also can vibrate and separate the sludge adhered to the surface of the elastic net 85, so that the sludge can be quickly transported and discharged through the spiral blade 82.

[0056] In the scheme designed by the present invention, the outer side surfaces of the inclined plate body 3 close to the two side walls of the sedimentation tank body 2 are provided with cavity bladder plates 31, and the cavity bladder plates 31 are connected to the tank wall of the sedimentation tank body 2; specifically, the cavity bladder plates 31 provided on the inclined plate bodies 3 on the left and right sides are connected to the left and right tank walls of the sedimentation tank body 2, which can seal the gaps generated between the inclined plate strips at both ends and the sedimentation tank body 2, and prevent the wastewater flowing into the bottom of the sedimentation tank body 2 from directly flowing upward through the cavity between the inner wall of the sedimentation tank body 2 and the inclined plate body 3, thereby affecting the sedimentation effect of colloids and flocculated suspended matter in the wastewater.

[0057] In the design of the present invention, each of the through-slots 422 is provided with a segmented elastic sealing membrane, and the two ends of each segment of the elastic sealing membrane are respectively connected to the supporting slider 494 and the groove wall of the through-slot 422; specifically, the setting of the elastic sealing membrane can prevent wastewater or precipitated sludge from entering the sleeve 42 through the through-slots 422, thereby affecting the normal sliding of the screw slider in the sleeve 42.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A process for treating phenolic resin industrial wastewater, characterized in that: The process includes the following steps: S1: Pretreatment: the collected phenolic resin industrial wastewater is passed into the grid pool to remove large particles of debris in the wastewater; alkaline substances are added to adjust the pH to neutral or slightly acidic, and then flocculants are added to the coagulation and sedimentation equipment to promote the coagulation of suspended matter and form particles that are easy to precipitate for precipitation; S2: Multi-stage bio-enhanced treatment, using the first-stage anaerobic reactor, the second-stage anaerobic reactor and the aerobic bio-enhanced reactor to treat the precipitated wastewater in multi-stage bio-enhanced treatment; S3: Membrane separation deep treatment, the discharged water is sent to the ultrafiltration membrane system, the membrane pore size is 0.01-0.1μm, and the ultrafiltration effluent is sent to the reverse osmosis membrane system; S4: Reuse and discharge. Treated water can be used as cooling water or cleaning water in the production process. Wastewater that meets the discharge standards can be discharged safely. The coagulation and sedimentation equipment in step S1 comprises a flocculation tank (1) and a sedimentation tank body (2), a plurality of inclined plate bodies (3) are provided in the sedimentation tank body (2), the plurality of inclined plate bodies (3) are movably installed in the sedimentation tank body (2) through a swing adjustment mechanism (4), a sewage discharge tank (6) is provided at the bottom of the sedimentation tank body (2), an overflow weir (7) is provided in the sedimentation tank body (2), and the overflow weir (7) is located above the inclined plate body (3), a drainage trough (71) is provided on one side of the sedimentation tank body (2), and the drainage trough (71) is connected to the overflow weir (7); The swing adjustment mechanism (4) comprises a positioning column (41), a sleeve (42), a rotating shaft rod (43), a bolt (44), a guide sleeve (45) and an elastic rod (46). A plurality of the positioning columns (41) are rotatably mounted on the two side walls of the sedimentation tank body (2) via a rotating sleeve. A notch cavity (411) is provided at the end of the positioning column (41) located inside the sedimentation tank body (2). A sleeve (42) is fixedly provided at the bottom end of a plurality of the inclined plate bodies (3). A rotating shaft rod (43) is provided in the sleeve (42). Both ends of the rotating shaft rod (43) extend out of the sleeve (42) and engage with the notch cavity (411). Both ends of the rotating shaft rod (43) are The outer end of each of the plurality of inclined plate bodies (3) is provided with a threaded hole, and the interior of the positioning column (41) is also provided with a threaded hole. The outer end of the positioning column (41) is threadedly connected with a bolt (44), and the tail end of the bolt (44) is connected to the threaded hole formed on the rotating shaft rod (43). The plurality of positioning columns (41) rotatably mounted on a side wall of the sedimentation tank body (2) are connected by transmission via an external synchronous pulley assembly (83). The upper ends of the plurality of inclined plate bodies (3) are provided with guide sleeves (45), and the same elastic rod (46) is inserted into the plurality of guide sleeves (45) located on the same axis, and nuts are connected to both ends of the elastic rod (46); A driving screw (491) is connected between the two rotating shaft rods (43), and a screw slider (492) is sleeved on the driving screw (491), and the two rotating shaft rods (43) are rotatably connected to the two ends of the sleeve (42), the screw slider (492) is located in the sleeve (42), the inner wall of the sleeve (42) is insulated and provided with an electromagnetic suction strip (421), the outer ring surface of the screw slider (492) is insulated and provided with a metal ring (493), the metal ring (493) is in contact with the electromagnetic suction strip (421), the sleeve (42) is provided with a through slide groove (422) along its length direction, and a support slider (494) is slidably provided in the through slide groove (422), and an elastic scraper (5) is provided between two adjacent inclined plate bodies (3), and the side wall of the elastic scraper (5) is connected to the support slider (494).

2. A phenolic resin industrial wastewater treatment process according to claim 1, characterized in that: The swing adjustment mechanism (4) further comprises a gear (47), a rack (48) and a hydraulic cylinder (49); a plurality of the positioning columns (41) rotatably mounted on the other side wall of the sedimentation tank body (2) are sleeved with a gear (47) on the outside; the plurality of the gears (47) are meshed with the same rack (48); a hydraulic cylinder (49) is vertically fixed to the other side wall of the sedimentation tank body (2); a piston rod of the hydraulic cylinder (49) is connected to the rack (48).

3. A phenolic resin industrial wastewater treatment process according to claim 1, characterized in that: The sewage discharge tank (6) is designed as a wave-shaped structure. A sewage discharge mechanism (8) is provided in each of the plurality of wave troughs of the sewage discharge tank (6). The sewage discharge mechanism (8) comprises a drive shaft (81), a spiral blade (82), a synchronous belt pulley assembly (83) and a sewage discharge pipe (84). A drive shaft (81) is rotatably mounted in each of the wave troughs of the sewage discharge tank (6) via a bearing, and each of the drive shafts (81) is sleeved with a spiral blade (82). The outer ends of the plurality of drive shafts (81) extend out of the sewage discharge tank (6) and are mutually transmission-connected via the synchronous belt pulley assembly (83). The ends of the plurality of wave troughs of the sewage discharge tank (6) are all connected to the sewage discharge pipe (84).

4. A phenolic resin industrial wastewater treatment process according to claim 3, characterized in that: The sewage discharge mechanism (8) further comprises an elastic net (85), a protrusion (86) and a drainage pipe (87); an elastic net (85) is suspended in each trough of the sewage discharge pool (6); the sewage discharge pipe (84) is located above the elastic net (85); a plurality of protrusions (86) are fixedly provided on the spiral ring surface of the spiral blade (82); the plurality of protrusions (86) are in rotational compression contact with the elastic net (85); and a drainage pipe (87) is connected to the bottom of the trough end surface of the sewage discharge pool (6).

5. A phenolic resin industrial wastewater treatment process according to claim 1, characterized in that: The outer side surfaces of the inclined plate body (3) close to the two side walls of the sedimentation tank body (2) are both provided with cavity bladder plates (31), and the cavity bladder plates (31) are connected to the tank walls of the sedimentation tank body (2).

6. A phenolic resin industrial wastewater treatment process according to claim 1, characterized in that: Each of the through-slots (422) is provided with a segmented elastic sealing membrane, and the two ends of each segment of the elastic sealing membrane are respectively connected to the supporting sliding block (494) and the groove wall of the through-slot (422).

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