Wastewater treatment device and treatment process for water-based ink

Abstract

The present invention relates to the field of wastewater treatment, and specifically to a wastewater treatment device and treatment process for water-based ink, comprising a treatment tank; a separation unit is provided at the bottom of the treatment tank, the separation unit comprising a filter chamber and a collection chamber arranged vertically from top to bottom, the separation unit further comprising a lifting shell arranged in the treatment tank along the axis of the treatment tank, an annular groove is provided on the peripheral wall of the lifting shell around the axis of the lifting shell, the annular groove has three states: collection, filtration, and discharge. When the annular groove is in the collection state, the bottom end face of the annular groove is coplanar with the lowest point of the bottom end face of the treatment tank; when the annular groove is in the filtration state, the annular groove is located in the filter chamber and the lifting shell rotates around its own axis. The present invention not only prevents the wastewater from lifting up excessive sediment accumulated at the bottom of the treatment tank during stirring, but also ensures that the sediment can be automatically dehydrated when discharged, thereby improving the treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the field of wastewater treatment, and in particular to a wastewater treatment device and treatment process for water-based ink. Background Art

[0002] During the production process of water-based ink, it is often necessary to treat the water-based ink wastewater through a wastewater treatment device. The structure of common water-based ink wastewater treatment devices is not compact enough and takes up a lot of space. In addition, common water-based ink wastewater treatment devices mostly use a motor-driven stirring rod to stir the wastewater, which has a slow stirring speed and is inconvenient to install the stirring rod.

[0003] Chinese patent announcement number CN214106717U discloses a water-based ink wastewater treatment device, including a water tank and a water bucket, the interior of the water tank is divided into a pretreatment chamber, a purification chamber and an adsorption chamber in sequence by two partitions, a filter is fixedly provided inside the pretreatment chamber, a reverse osmosis filter element is provided inside the purification chamber, brackets are fixedly provided on both sides of the bottom end of the reverse osmosis filter element, the bottom ends of the two brackets are fixedly connected to the inner wall of the bottom end of the water tank by bolts, an activated carbon adsorption plate is fixedly provided inside the adsorption chamber, a first electric butterfly valve is fixedly provided at the bottom of one side of the water tank, and a filter screen is fixedly provided inside the pretreatment chamber. A conduit is fixedly provided on the top of one side, and both sides of the top of the water tank are fixedly connected to the two sides of the bottom of the bucket through supports. A second electric butterfly valve is fixedly provided on the bottom of one side of the water bucket, and one end of the second electric butterfly valve is fixedly connected to one end of the conduit. A feed pipe is fixedly provided on one side of the top of the water bucket, and an air pump is fixedly provided on the other side of the top of the water bucket. An air distribution pipe is fixedly provided at the air outlet end of the air pump, and a number of diversion pipes are fixedly provided at the bottom end of the air distribution pipe. A number of pipe openings are opened at the top of the water bucket, and one ends of a number of the diversion pipes respectively pass through a number of pipe openings and are placed inside the water tank.

[0004] The above scheme provides a device for treating wastewater generated during the preparation of water-based ink. By injecting gas into the water bucket, the gas disturbs the wastewater in the water bucket. Although it can accelerate the flocculation of the wastewater, the solid suspended matter after flocculation is difficult to settle under the disturbance of the airflow. At the same time, the gas that comes into contact with the wastewater needs to be filtered after being discharged. Even if solid impurities are precipitated at the bottom of the water tank, the impurities at the bottom of the water tank cannot be discharged. When the wastewater is discharged through the conduit, the solid suspended matter and impurities at the bottom of the water tank will flow into the conduit together with the wastewater, causing the conduit to be blocked. Summary of the Invention

[0005] In response to the above problems, a wastewater treatment device and treatment process for water-based ink are provided, which comprises a filter chamber and a collection chamber provided at the lower part of a treatment tank, and a lifting shell provided in the treatment tank for movement along the axis of the treatment tank. During the process of the treatment tank treating the wastewater, the lifting shell moves back and forth in the vertical direction, and the lifting shell has a highest position and a lowest position in the lifting path. When the lifting shell starts to descend from the highest position, the annular groove provided on the lifting shell passes through three states of collection, filtration and discharge in sequence. When the annular groove is in the collection state, the annular groove is communicated with the treatment tank, and the sediment in the treatment tank falls into the annular groove. Then the lifting shell descends, and the lifting shell drives the annular groove to descend synchronously. When the annular groove completely enters the filter chamber, the lifting shell starts to rotate around its own axis. The solid-liquid mixture in the annular groove undergoes solid-liquid separation under the action of centrifugal force, and the solid matter remains in the annular groove. When the lifting shell continues to descend and causes the annular groove to enter the collection chamber, the solid matter in the annular groove is thrown out. At this time, the annular groove is in the discharge state. Then the lifting shell is reset to the highest position and the above steps are repeated.

[0006] In order to solve the problems of the prior art, the present invention provides a wastewater treatment device for water-based ink, comprising a treatment tank; a separation unit is provided at the bottom of the treatment tank, the separation unit comprising a filter chamber and a collection chamber arranged from top to bottom in a vertical direction, the separation unit also comprising a lifting shell arranged in the treatment tank along the axis of the treatment tank, an annular groove is provided on the peripheral wall of the lifting shell around the axis of the lifting shell, the annular groove has three states: collection, filtering and discharge, and when the annular groove is in the collection state, the bottom end face of the annular groove is coplanar with the lowest point of the bottom end face of the treatment tank; when the annular groove is in the filtering state, the annular groove is located in the filter chamber and the lifting shell rotates around its own axis; when the annular groove is in the discharge state, the annular groove is located in the collection chamber and the lifting shell rotates around its own axis, and when the treatment tank treats the wastewater, the lifting shell moves back and forth in the vertical direction.

[0007] Preferably, the bottom of the processing tank is a funnel-shaped structure.

[0008] Preferably, a plurality of guide blocks are fixedly provided on both the upper end surface and the lower end surface of the annular groove around the axis of the lifting shell, and the extending direction of the guide blocks is parallel to the radial direction of the annular groove.

[0009] Preferably, a blocking disk is provided on the upper part of the lifting shell. When the upper end surface of the lifting shell is higher than the lowest point of the bottom end surface of the processing tank, the bottom of the blocking disk contacts the lifting shell, and the blocking disk rises and falls synchronously with the lifting shell. When the upper end surface of the lifting shell is lower than the lowest point of the bottom end surface of the processing tank, the blocking disk contacts the lowest point of the bottom end surface of the processing tank, and as the lifting shell descends, a debris removal cavity is formed between the blocking disk and the lifting shell.

[0010] Preferably, the filter chamber includes a filter screen fixedly arranged at the bottom of the processing tank. The filter screen is an annular structure. An annular fan is provided on the outer periphery of the filter screen. When the annular groove is in the discharge state, the fan starts and the air blown out by the fan flows through the filter screen from outside to inside.

[0011] Preferably, a slag discharge groove is vertically opened on the lifting shell, and when the impurity removal cavity is formed, the slag discharge groove and the impurity removal cavity are communicated with each other.

[0012] Preferably, a stirring unit is provided in the processing tank, and the stirring unit comprises a stirring shaft fixedly provided on the upper part of the blocking disk along the axis of the processing tank, and the blocking disk rotates synchronously with the stirring shaft.

[0013] Preferably, a lifting unit capable of driving the lifting shell to rise and fall is provided at the bottom of the lifting shell, the lifting unit includes a hoist arranged at the lower part of the collecting chamber, a traction rope is wound inside the hoist, a lifting disk is fixedly provided at the end of the traction rope, an extension sleeve is vertically fixed at the bottom of the lifting shell, the bottom of the extension sleeve contacts and rotates with the upper part of the lifting disk, when the lifting disk is raised and lowered, the extension sleeve rises and falls synchronously with the lifting disk, and a driving unit for driving the extension sleeve to rotate around its own axis is provided on one side of the extension sleeve.

[0014] Preferably, a discharge port is provided at the bottom of the collecting chamber, and a scraper is provided in the collecting chamber to rotate synchronously with the extension sleeve, and the scraper and the extension sleeve are slidably matched in the vertical direction.

[0015] The present invention also relates to a wastewater treatment process for water-based ink, which uses a wastewater treatment device for water-based ink, and the specific steps are as follows:

[0016] S1. Wastewater and flocculant are added to the treatment tank and stirred. The suspended solids and colloids captured by the flocculant are deposited at the bottom of the treatment tank. At this time, the lifting shell is at the highest position and the annular groove is in the collection state. The suspended solids and colloids deposited at the bottom of the treatment tank are received by the annular groove.

[0017] S2. The lifting shell drives the annular groove to descend in the vertical direction. When the annular groove completely enters the filter chamber, the lifting shell rotates around the axis. The liquid in the annular groove passes through the side wall of the filter chamber under the action of centrifugal force. The solid matter is intercepted by the side wall of the filter chamber and descends synchronously with the lifting shell. When the lower part of the lifting shell is about to enter the collection chamber, the solid-liquid separation process is completed;

[0018] S3. When the annular groove descends into the collecting chamber, the lifting shell continues to rotate, and the solid matter in the annular chamber is thrown into the collecting chamber under the action of centrifugal force.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the lifting shell continues to descend and causes the annular groove to enter the collecting chamber, the solid matter in the annular groove is thrown out, and the annular groove is in the discharge state, and then the lifting shell is reset to the highest position and the above steps are repeated. It not only avoids the excessive sediment accumulated at the bottom of the treatment tank from being lifted up when the wastewater is stirred, but also ensures that the sediment can be automatically dehydrated when discharged, thereby improving the treatment efficiency.

[0021] 2. A blocking disk is provided on the upper part of the lifting shell. When the upper end surface of the lifting shell is higher than the lowest point of the bottom end surface of the treatment tank, the bottom of the blocking disk contacts the lifting shell, and the blocking disk rises and falls synchronously with the lifting shell. When the upper end surface of the lifting shell is lower than the lowest point of the bottom end surface of the treatment tank, the blocking disk contacts the lowest point of the bottom end surface of the treatment tank, and as the lifting shell descends, a debris removal chamber is formed between the blocking disk and the lifting shell. At the same time, the filter chamber includes a filter screen and a fan. The fan can blow solid impurities stuck on the filter screen into the debris removal chamber and discharge them from the slag discharge trough. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of a wastewater treatment device for water-based ink according to the present invention.

[0023] Figure 2 The present invention is a side view of a wastewater treatment device for water-based ink.

[0024] Figure 3 The present invention is a wastewater treatment device for water-based ink Figure 2 Schematic cross-sectional view at AA in the middle.

[0025] Figure 4 It is a cutaway perspective schematic diagram of a wastewater treatment device for water-based ink according to the present invention when an annular groove is in a collecting state.

[0026] Figure 5 The present invention is a wastewater treatment device for water-based ink Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0027] Figure 6 It is a cutaway perspective schematic diagram of a wastewater treatment device for water-based ink according to the present invention when an annular groove is in a filtering state.

[0028] Figure 7 The present invention is a wastewater treatment device for water-based ink Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0029] Figure 8 It is a cutaway perspective schematic diagram of a wastewater treatment device for water-based ink according to the present invention when the middle annular groove is in a discharge state.

[0030] Figure 9 The present invention is a wastewater treatment device for water-based ink Figure 8 A local enlarged schematic diagram of point D in the middle.

[0031] Figure 10 The present invention is a wastewater treatment device for water-based ink Figure 8 A partial enlarged schematic diagram of point E in the middle.

[0032] Figure 11 It is a three-dimensional schematic diagram of a wastewater treatment device for water-based ink of the present invention with the treatment tank removed.

[0033] The numbers in the figure are:

[0034] 1. Processing tank; 2. Separation unit; 21. Filter chamber; 211. Filter screen; 212. Fan; 213. Drain trough; 22. Collecting chamber; 221. Discharge port; 222. Scraper; 23. Lifting shell; 231. Annular groove; 232. Guide block; 233. Slag trough; 24. Blocking disk; 241. Extension rod; 3. Stirring unit; 31. Stirring shaft; 32. Stirring rod; 33. First gear; 34. First gear ring; 35. Rotary drive; 4. Lifting unit; 41. Hoist; 42. Extension sleeve; 43. Traction rope; 44. Lifting disk; 45. Drive unit; 451. Second gear ring; 452. Second gear; 453. Second rotary drive. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 1-Figure 3: A wastewater treatment device for water-based ink, comprising a treatment tank 1; a separation unit 2 is provided at the bottom of the treatment tank 1, the separation unit 2 comprising a filter chamber 21 and a collection chamber 22 arranged from top to bottom in the vertical direction, the separation unit 2 also comprising a lifting shell 23 arranged in the treatment tank 1 and movable along the axis of the treatment tank 1, an annular groove 231 is provided on the peripheral wall of the lifting shell 23 around the axis of the lifting shell 23, the annular groove 231 has three states: collecting, filtering and discharging. When the annular groove 231 is in the collecting state, the bottom end face of the annular groove 231 is coplanar with the lowest point of the bottom end face of the treatment tank 1; when the annular groove 231 is in the filtering state, the annular groove 231 is located in the filter chamber 21 and the lifting shell 23 rotates around its own axis; when the annular groove 231 is in the discharging state, the annular groove 231 is located in the collecting chamber 22 and the lifting shell 23 rotates around its own axis. When the treatment tank 1 treats the wastewater, the lifting shell 23 moves back and forth in the vertical direction.

[0037] The wastewater generated during the preparation of water-based inks needs to go through the following steps when it is treated, including pretreatment, biological treatment, deep treatment and disinfection. The pretreatment step includes filtration, water quality adjustment, coagulation and sedimentation, and flotation treatment. In the existing coagulation and sedimentation step, by adding coagulants and flocculants, suspended matter and colloids are precipitated to remove some organic matter and color. In order to improve the effect of coagulation and sedimentation, the wastewater in the coagulation and sedimentation state is usually stirred so that the wastewater and the coagulant and flocculant can mix with each other faster. In the coagulation and sedimentation process, although stirring can improve the effect of wastewater flocculation, it is necessary to precipitate the suspended matter and colloids after flocculation. As the sediment at the bottom of the treatment tank 1 increases, the sediment on the upper layer will be affected by the flowing water when the wastewater is stirred, causing the suspended matter and colloid on the upper layer to be lifted up again. There are two ways to prevent the settled suspended matter and colloids from being stirred up. One is not to stir the wastewater during flocculation, and the other is to discharge the sediment at the bottom of the treatment tank 1 in time to avoid excessive accumulation of sediment at the bottom of the treatment tank 1. However, in the process of discharging the sediment in the existing technology, the sediment and the wastewater are mixed with each other. After the sediment is discharged, the sediment and the wastewater need to be separated. Due to the large content of the sediment, the separation is also very difficult. Direct filtration using the existing filter element is easily blocked by the sediment.

[0038] In order to avoid the above situation, the structure of the existing wastewater treatment device is redesigned so that the treatment tank 1 can discharge the sediment during the flocculation process of the wastewater, and the sediment can be automatically dehydrated during the discharge process. This not only avoids the wastewater from stirring and stirring the excessive sediment at the bottom of the treatment tank 1, but also ensures that the sediment can be automatically dehydrated when discharged, thereby improving the treatment efficiency. The specific structure and working process of the wastewater treatment device of the present invention are as follows:

[0039] A stirring unit 3 is provided in the treatment tank 1, and a feeding port is provided at the upper part of the treatment tank 1. When the wastewater is treated, the wastewater and flocculant are fed into the treatment tank 1 through the feeding port, and then the wastewater and flocculant in the treatment tank 1 are stirred by the stirring unit 3, so that the organic matter and colloid in the wastewater can be quickly mixed. At this time, the lifting shell 23 is in the highest position, and the bottom end face of the annular groove 231 on the lifting shell 23 is coplanar with the bottom end face of the treatment tank 1. The annular groove 231 is in a collecting state, and the suspended matter and colloid are precipitated to the bottom of the treatment tank 1. Since the bottom of the treatment tank 1 is an inclined structure, the precipitated suspended matter and colloid enter the annular groove 231 under the guidance of the bottom of the treatment tank 1, and then the lifting shell 23 descends, and the annular groove 231 descends synchronously with the lifting shell 23. The annular groove 231 and the treatment tank 1 will be disconnected, and at this time the annular groove 231 is full of a solid-liquid mixture, that is, a substance mixed with wastewater and sediment. When the annular groove 231 is disconnected from the treatment tank 1, the suspended matter and colloid settled in the treatment tank 1 can no longer enter the annular groove 231. At this time, the annular groove 231 enters the filter chamber 21, and the annular groove 231 is in a filtering state. At the same time, the lifting shell 23 starts to rotate around its own axis. When the lifting shell 23 rotates, centrifugal force is generated. The solid-liquid mixture in the annular groove 231 begins to separate solid-liquid under the action of centrifugal force. The liquid in the solid-liquid mixture passes through the side wall of the filter chamber 21 under the action of centrifugal force, and the solid matter in the solid-liquid mixture is intercepted by the side wall of the filter chamber 21. When the annular groove 231 completely passes through the filter chamber 21, the solid-liquid mixture completes solid-liquid separation. The annular groove 231 is separated, and only solid matter remains in the annular groove 231. As the lifting shell 23 continues to descend, the annular groove 231 enters the collection chamber 22 and communicates with the collection chamber 22. At this time, the lifting shell 23 is still rotating around its own axis, and the solid matter in the annular groove 231 is thrown into the collection chamber 22 under the action of centrifugal force. When the lifting shell 23 descends to the lowest position, the lifting shell 23 starts to rise, and the lifting shell 23 stops rotating during the rising process, which reduces energy consumption. When the lifting shell 23 rises to the highest position, it stops moving and repeats the above process again, so that the annular groove 231 switches in sequence among the three states of collection, filtration and discharge as the lifting shell 23 descends.

[0040] By setting a filtering chamber 21 and a collecting chamber 22 at the lower part of the treatment tank 1, and setting a lifting shell 23 in the treatment tank 1 along the axial movement of the treatment tank 1, the lifting shell 23 moves back and forth in the vertical direction during the treatment of the wastewater by the treatment tank 1. The lifting shell 23 has a highest position and a lowest position in the lifting path. When the lifting shell 23 starts to descend from the highest position, the annular groove 231 set on the lifting shell 23 passes through the three states of collection, filtration and discharge in sequence. When the annular groove 231 is in the collection state, the annular groove 231 is connected to the treatment tank 1, and the sediment in the treatment tank 1 falls into The annular groove 231 is then lowered, and the lifting shell 23 drives the annular groove 231 to descend synchronously. When the annular groove 231 completely enters the filter chamber 21, the lifting shell 23 begins to rotate around its own axis. The solid-liquid mixture in the annular groove 231 undergoes solid-liquid separation under the action of centrifugal force, and the solid matter remains in the annular groove 231. When the lifting shell 23 continues to descend and the annular groove 231 enters the collection chamber 22, the solid matter in the annular groove 231 is thrown out. At this time, the annular groove 231 is in a discharge state. The lifting shell 23 then returns to the highest position and repeats the above steps. This not only prevents the wastewater from lifting up the excessive sediment accumulated at the bottom of the treatment tank 1 during stirring, but also ensures that the sediment can be automatically dehydrated when discharged, thereby improving the treatment efficiency.

[0041] Reference Figure 3 : The bottom of the processing tank 1 is a funnel-shaped structure.

[0042] Since the suspended matter and colloid in the treatment tank 1 will settle to the bottom of the treatment tank 1, in order to allow the precipitated suspended matter and colloid to smoothly enter the annular cavity of the lifting shell 23, a funnel-shaped structure is provided at the bottom of the treatment tank 1. Under the guidance of the inclined end surface of the bottom of the treatment tank 1, the precipitated suspended matter and colloid can smoothly enter the annular cavity of the lifting shell 23.

[0043] Reference Figure 5 : A plurality of guide blocks 232 are fixedly provided on the upper and lower end surfaces of the annular groove 231 around the axis of the lifting shell 23, and the extension direction of the guide blocks 232 is parallel to the radial direction of the annular groove 231.

[0044] By arranging guide blocks 232 on both the upper and lower end surfaces of the annular groove 231, when the lifting shell 23 rotates around its own axis, the guide blocks 232 arranged on the upper and lower end surfaces of the annular groove 231 can provide a driving force to the solid-liquid mixture, so that when the lifting shell 23 rotates, the solid-liquid mixture will not slip in the annular groove 231, so that the solid-liquid mixture can be better separated from the liquid under the action of centrifugal force.

[0045] Reference Figure 5-Figure 7 and Figure 9: A blocking disk 24 is provided on the upper part of the lifting shell 23. When the upper end surface of the lifting shell 23 is higher than the lowest point of the bottom end surface of the processing tank 1, the bottom of the blocking disk 24 contacts the lifting shell 23, and the blocking disk 24 rises and falls synchronously with the lifting shell 23. When the upper end surface of the lifting shell 23 is lower than the lowest point of the end surface of the bottom of the processing tank 1, the blocking disk 24 contacts the lowest point of the bottom end surface of the processing tank 1, and as the lifting shell 23 descends, a debris removal cavity is formed between the blocking disk 24 and the lifting shell 23.

[0046] Reference Figure 7 : The filter chamber 21 includes a filter screen 211 fixedly arranged at the bottom of the treatment tank 1. The filter screen 211 is an annular structure. An annular fan 212 is provided on the outer periphery of the filter screen 211. When the annular groove 231 is in the discharge state, the fan 212 starts, and the air blown out by the fan 212 flows through the filter screen 211 from the outside to the inside.

[0047] A drain trough 213 is provided below the fan 212 for discharging the filtered liquid.

[0048] Reference Figure 7 and Figure 9 A slag discharge groove 233 is vertically provided on the lifting shell 23. When the impurity removal cavity is formed, the slag discharge groove 233 and the impurity removal cavity are communicated with each other.

[0049] When the annular groove 231 receives the sediment in the processing tank 1 and descends with the lifting shell 23, the solid-liquid mixture in the annular groove 231 will block the filter screen 211 when the lifting shell 23 rotates. Although the lifting shell 23 can scrape off some of the solid impurities blocked on the filter screen 211 during the descent process, there are still some solid impurities that cannot be scraped off by the lifting shell 23. In order to prevent the filter screen 211 from being gradually blocked as it is used, a fan 212 is provided on the periphery of the filter screen 211. When the annular groove 231 is in the discharge state, that is, the annular groove 231 is in the collecting chamber 22, the fan 212 is started, and the fan 212 blows the airflow from the outside to the inside toward the filter screen 211. The solid matter stuck on the filter screen 211 can be blown off under the action of the airflow, and the blown solid impurities fall into the impurity removal cavity and are discharged through the slag discharge groove 233. When the lifting shell 23 rises from the lowest position to the highest position, the lifting shell 23 gradually approaches the blocking disk 24. At this time, the blocking disk 24 is at the lowest point of the bottom end surface of the processing tank 1. When the lifting shell 23 contacts the blocking disk 24, the lifting shell 23 drives the blocking disk 24 to rise synchronously until the lifting shell 23 reaches the highest position and stops rising. A plurality of extension rods 241 are evenly fixed around the axis of the blocking disk 24 at the bottom of the blocking disk 24. The axis of the blocking disk 24 is colinear with the axis of the processing tank 1. The extension rods 241 extend into the slag discharge groove 233 and slide with the slag discharge groove 233. The outer diameter of the circular structure formed by the extension rods 241 is the same as the inner diameter of the slag discharge groove 233. During the lifting and lowering process of the lifting shell 23, the extension rods 241 always slide with the slag discharge groove 233, thereby preventing the blocking disk 24 from slipping off the lifting shell 23 during the lifting or lowering process of the lifting shell 23.

[0050] Reference Figure 3 and Figure 4 : A stirring unit 3 is provided in the processing tank 1. The stirring unit 3 includes a stirring shaft 31 fixedly provided on the upper part of the blocking disk 24 along the axis of the processing tank 1. The blocking disk 24 rotates synchronously with the stirring shaft 31.

[0051] By fixing the stirring shaft 31 on the upper part of the blocking disk 24, when the lifting shell 23 drives the blocking disk 24 to rise and fall, the blocking disk 24 has sufficient gravity to press on the lifting shell 23, thereby preventing the wastewater in the treatment tank 1 from flowing into the slag discharge trough 233 through the gap between the blocking disk 24 and the lifting shell 23. The stirring unit 3 also includes a stirring rod 32, a first gear 33, a first gear ring 34 and a first rotation driver 35. A plurality of stirring rods 32 are fixedly arranged on the side wall of the stirring shaft 31. The stirring shaft 31 extends to the upper part of the processing tank 1 and penetrates the upper part of the processing tank 1. The stirring shaft 31 can slide with the processing tank 1 in the vertical direction. The first gear ring 34 is arranged on the upper part of the processing tank 1 and is sleeved on the stirring shaft 31. The stirring shaft 31 rotates synchronously with the first gear ring 34, and the stirring shaft 31 slides with the first gear ring 34 in the vertical direction. The first gear 33 rotates and engages on one side of the first gear ring 34. A first rotation driver 35 is arranged on the upper part of the first gear 33. The output end of the first rotation driver 35 is fixedly connected to the first gear 33. The first rotation driver 35 is preferably a servo motor.

[0052] Reference Figure 6 、 Figure 8 and Figure 11 : A lifting unit 4 that can drive the lifting shell 23 to rise and fall is provided at the bottom of the lifting shell 23. The lifting unit 4 includes a hoist 41 arranged at the lower part of the collecting chamber 22. A traction rope 43 is wound around the hoist 41. A lifting disk 44 is fixedly provided at the end of the traction rope 43. An extension sleeve 42 is vertically fixed at the bottom of the lifting shell 23. The bottom of the extension sleeve 42 contacts and rotates with the upper part of the lifting disk 44. When the lifting disk 44 is raised or lowered, the extension sleeve 42 rises and falls synchronously with the lifting disk 44. A driving unit 45 for driving the extension sleeve 42 to rotate around its own axis is provided on one side of the extension sleeve 42.

[0053] When the hoist 41 reels in the traction rope 43, the lifting disc 44 drives the extension disc to rise synchronously. When the hoist 41 releases the traction rope 43, the lifting disc 44 drives the extension disc to descend synchronously. The driving unit 45 includes a second gear ring 451, a second gear 452 and a second rotation driver 45335. The second gear ring 451 is sleeved on the periphery of the extension sleeve 42. The second gear 452 is arranged on one side of the second gear ring 451 and is rotatably engaged with the second gear ring 451. A second rotation driver 45335 for driving the second gear 452 to rotate is provided at the end of the second gear 452. The second rotation driver 45335 is preferably a servo motor.

[0054] Reference Figure 10 : A discharge port 221 is provided at the bottom of the collecting chamber 22, and a scraper 222 is provided in the collecting chamber 22 to rotate synchronously with the extension sleeve 42, and the scraper 222 and the extension sleeve 42 slide in cooperation in the vertical direction.

[0055] When the extension sleeve 42 drives the lifting shell 23 to rotate synchronously, the scraper 222 rotates synchronously with the extension sleeve 42. However, since the scraper 222 and the extension sleeve 42 slide together in the vertical direction, when the extension sleeve 42 moves in the vertical direction, the scraper 222 will not move synchronously with the extension sleeve 42. When the scraper 222 rotates synchronously with the extension sleeve 42, it scrapes the solid matter inside the collecting chamber to the discharge outlet 221 for discharge.

[0056] Reference Figures 1-11 The present invention also relates to a wastewater treatment process for water-based ink, which uses a wastewater treatment device for water-based ink, and the specific steps are as follows:

[0057] S1. Wastewater and flocculant are added to the treatment tank 1 and stirred. The suspended matter and colloid captured by the flocculant are deposited at the bottom of the treatment tank 1. At this time, the lifting shell 23 is at the highest position, and the annular groove 231 is in a collecting state. The suspended matter and colloid deposited at the bottom of the treatment tank 1 are received by the annular groove 231.

[0058] S2: The lifting shell 23 drives the annular groove 231 downward in the vertical direction. When the annular groove 231 completely enters the filter chamber 21, the lifting shell 23 rotates around the axis. The liquid in the annular groove 231 passes through the side wall of the filter chamber 21 under the action of centrifugal force. The solid matter is intercepted by the side wall of the filter chamber 21 and descends synchronously with the lifting shell 23. When the lower part of the lifting shell 23 is about to enter the collection chamber 22, the solid-liquid separation process is completed.

[0059] S3. When the annular groove 231 descends into the collecting chamber 22, the lifting shell 23 continues to rotate, and the solid matter in the annular chamber is thrown into the collecting chamber 22 under the action of centrifugal force.

[0060] Working principle: A stirring unit 3 is provided in the treatment tank 1, and a feeding port is provided on the upper part of the treatment tank 1. When the wastewater is treated, the wastewater and flocculant are fed into the treatment tank 1 through the feeding port, and then the wastewater and flocculant in the treatment tank 1 are stirred by the stirring unit 3, so that the organic matter and colloid in the wastewater can be quickly mixed. At this time, the lifting shell 23 is in the highest position, and the bottom end face of the annular groove 231 on the lifting shell 23 is coplanar with the bottom end face of the treatment tank 1. The annular groove 231 is in a collecting state, and the suspended matter and colloid are precipitated to the bottom of the treatment tank 1. Since the bottom of the treatment tank 1 is an inclined structure, the precipitated suspended matter and colloid enter the annular groove 231 under the guidance of the bottom of the treatment tank 1, and then the lifting shell 23 descends, and the annular groove 231 descends synchronously with the lifting shell 23. The annular groove 231 and the treatment tank 1 will be disconnected, and at this time the annular groove 231 is full of a solid-liquid mixture, that is, a substance mixed with wastewater and sediment. When the annular groove 231 is disconnected from the treatment tank 1, the suspended matter and colloid settled in the treatment tank 1 can no longer enter the annular groove 231. At this time, the annular groove 231 enters the filter chamber 21, and the annular groove 231 is in a filtering state. At the same time, the lifting shell 23 starts to rotate around its own axis. When the lifting shell 23 rotates, centrifugal force is generated. The solid-liquid mixture in the annular groove 231 begins to separate solid-liquid under the action of centrifugal force. The liquid in the solid-liquid mixture passes through the side wall of the filter chamber 21 under the action of centrifugal force, and the solid matter in the solid-liquid mixture is intercepted by the side wall of the filter chamber 21. When the annular groove 231 completely passes through the filter chamber 21, the solid-liquid mixture completes solid-liquid separation. The annular groove 231 is separated, and only solid matter remains in the annular groove 231. As the lifting shell 23 continues to descend, the annular groove 231 enters the collection chamber 22 and communicates with the collection chamber 22. At this time, the lifting shell 23 is still rotating around its own axis, and the solid matter in the annular groove 231 is thrown into the collection chamber 22 under the action of centrifugal force. When the lifting shell 23 descends to the lowest position, the lifting shell 23 starts to rise, and the lifting shell 23 stops rotating during the rising process, which reduces energy consumption. When the lifting shell 23 rises to the highest position, it stops moving and repeats the above process again, so that the annular groove 231 switches in sequence among the three states of collection, filtration and discharge as the lifting shell 23 descends.

[0061] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A wastewater treatment device for water-based ink, comprising a treatment tank (1); It is characterized by: A separation unit (2) is provided at the bottom of the treatment tank (1), the separation unit (2) comprising a filter chamber (21) and a collection chamber (22) arranged vertically from top to bottom, the separation unit (2) further comprising a lifting shell (23) arranged in the treatment tank (1) and movable along the axis of the treatment tank (1), an annular groove (231) is provided on the peripheral wall of the lifting shell (23) around the axis of the lifting shell (23), the annular groove (231) having three states of collection, filtration and discharge, and the annular groove (231) is in the collection state. In the state, the bottom end surface of the annular groove (231) is coplanar with the lowest point of the bottom end surface of the treatment tank (1); when the annular groove (231) is in the filtering state, the annular groove (231) is located in the filtering chamber (21) and the lifting shell (23) rotates around its own axis; when the annular groove (231) is in the discharge state, the annular groove (231) is located in the collecting chamber (22) and the lifting shell (23) rotates around its own axis, and when the treatment tank (1) treats wastewater, the lifting shell (23) reciprocates in the vertical direction; A blocking disk (24) is provided on the upper portion of the lifting shell (23). When the upper end surface of the lifting shell (23) is higher than the lowest point of the bottom end surface of the processing tank (1), the bottom of the blocking disk (24) contacts the lifting shell (23), and the blocking disk (24) rises and falls synchronously with the lifting shell (23). When the upper end surface of the lifting shell (23) is lower than the lowest point of the bottom end surface of the processing tank (1), the blocking disk (24) contacts the lowest point of the bottom end surface of the processing tank (1), and as the lifting shell (23) descends, a debris removal cavity is formed between the blocking disk (24) and the lifting shell (23); The filter chamber (21) includes a filter screen (211) fixedly arranged at the bottom of the processing tank (1); the filter screen (211) is an annular structure; an annular fan (212) is provided on the periphery of the filter screen (211); when the annular groove (231) is in a discharge state, the fan (212) is started, and the air blown out by the fan (212) flows from the outside to the inside through the filter screen (211); A lifting unit (4) capable of driving the lifting shell (23) to move up and down is provided at the bottom of the lifting shell (23). The lifting unit (4) includes a hoist (41) provided at the lower part of the collecting chamber (22). A traction rope (43) is wound around the hoist (41). A lifting disc (44) is fixedly provided at the end of the traction rope (43). An extension sleeve (42) is vertically fixedly provided at the bottom of the lifting shell (23). The bottom of the extension sleeve (42) contacts and rotates with the upper part of the lifting disc (44). When the lifting disc (44) moves up and down, the extension sleeve (42) moves up and down synchronously with the lifting disc (44). A driving unit (45) for driving the extension sleeve (42) to rotate around its own axis is provided on one side of the extension sleeve (42).

2. A wastewater treatment device for water-based ink according to claim 1, characterized in that: The bottom of the processing tank (1) is a funnel-shaped structure.

3. A wastewater treatment device for water-based ink according to claim 1, characterized in that: A plurality of guide blocks (232) are fixedly provided on the upper and lower end surfaces of the annular groove (231) around the axis of the lifting shell (23), and the extension direction of the guide blocks (232) is parallel to the radial direction of the annular groove (231).

4. A wastewater treatment device for water-based ink according to claim 1, characterized in that: A slag discharge groove (233) is vertically penetrated on the lifting shell (23); when the impurity removal cavity is formed, the slag discharge groove (233) and the impurity removal cavity are communicated with each other.

5. A wastewater treatment device for water-based ink according to claim 1, characterized in that: A stirring unit (3) is provided in the processing tank (1), and the stirring unit (3) comprises a stirring shaft (31) fixedly provided on the upper part of the blocking disk (24) along the axis of the processing tank (1), and the blocking disk (24) rotates synchronously with the stirring shaft (31).

6. A wastewater treatment device for water-based ink according to claim 1, characterized in that: A discharge port (221) is provided at the bottom of the collecting chamber (22). A scraper (222) that rotates synchronously with the extension sleeve (42) is also provided in the collecting chamber (22). The scraper (222) and the extension sleeve (42) are slidably matched in the vertical direction.

7. A wastewater treatment process for water-based ink, using a wastewater treatment device for water-based ink according to any one of claims 1 to 6, characterized in that: The specific steps are as follows: S1. Wastewater and flocculant are put into the treatment tank (1) and stirred. Suspended matter and colloid captured by the flocculant are deposited at the bottom of the treatment tank (1). At this time, the lifting shell (23) is at the highest position, and the annular groove (231) is in a collecting state. The suspended matter and colloid deposited at the bottom of the treatment tank (1) are received by the annular groove (231); S2, the lifting shell (23) drives the annular groove (231) to descend in the vertical direction. When the annular groove (231) completely enters the filter chamber (21), the lifting shell (23) rotates around the axis. The liquid in the annular groove (231) passes through the side wall of the filter chamber (21) under the action of centrifugal force. The solid matter is intercepted by the side wall of the filter chamber (21) and descends synchronously with the lifting shell (23). When the lower part of the lifting shell (23) is about to enter the collection chamber (22), the solid-liquid separation process is completed; S3. When the annular groove (231) descends into the collecting chamber (22), the lifting shell (23) continues to rotate, and the solid matter in the annular chamber is thrown into the collecting chamber (22) under the action of centrifugal force.

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