A device and method for treating waste liquid formaldehyde

Abstract

The present invention relates to the technical field of formaldehyde waste liquid treatment, and specifically discloses a formaldehyde waste liquid treatment device and method, comprising: a filter box, a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are arranged at intervals up and down, and are located on a side close to the filter box, a nozzle is installed on one side of the liquid inlet channel, and at least two filter cartridges are also included, the filter cartridge is a frustum structure, and its cross-section is a regular polygon structure, and multiple filter cartridges are coaxially arranged and horizontally rotatably installed on the inner side of the filter box. The beneficial effects of the present invention are as follows: since the accommodating chamber is in an inclined state, the filler will reciprocate on both sides of the accommodating chamber, and when the filler is located below the liquid inlet channel, the waste liquid is filtered, and when it is located on the other side, the nozzle flushes the filler, and in this cycle, the filler is constantly alternating between filtering the waste liquid and being flushed, so as to achieve the cleaning of the filler, and can be disassembled without stopping the machine, without manual intervention, so as to achieve the continuous cleaning of the filler.

Description

Technical Field

[0001] The invention relates to the technical field of formaldehyde waste liquid treatment, and in particular to a formaldehyde waste liquid treatment device and method. Background Art

[0002] Formaldehyde is an important industrial raw material, widely used in the production of chemical, pharmaceutical, wood preservatives and adhesives. A certain amount of high-concentration formaldehyde wastewater is often produced during the production process. Since formaldehyde is highly toxic to humans and other organisms, if it is not handled properly, this formaldehyde wastewater will seriously pollute the environment, destroy the ecology and endanger human health.

[0003] At present, high-concentration formaldehyde wastewater is first filtered through quartz sand to remove solid impurities in the wastewater, then filtered through activated carbon to adsorb organic impurities in the wastewater, and then distilled into gas and stored in a storage tank. Finally, the formaldehyde wastewater treatment device (i.e., formaldehyde absorption tower) uses water to absorb the gas in the storage tank to produce formaldehyde liquid of the required concentration.

[0004] The Chinese patent with the authorization announcement number CN114873667B discloses a formaldehyde wastewater treatment device, which relates to the field of formaldehyde wastewater treatment technology. Its technical solution mainly includes a tower body, at least one packing group is arranged in the tower body, a support plate for supporting the packing group is arranged in the tower body, an opening for the packing group to pass through is opened on the tower body, a switch assembly for opening or closing the opening is arranged at the opening of the tower body, a feeding assembly for unloading and loading the packing group is arranged on the opposite side of the opening of the tower body, and a material replacement assembly for replacing the packing group is arranged on the side of the opening of the tower body. This solution has the effect of improving the working efficiency of the formaldehyde wastewater treatment device.

[0005] In the above technical solution, when the filler is blocked and needs to be cleaned, the filler group needs to be unloaded into the feeding assembly, and the feeding assembly transports the filler group close to the ground. The staff replaces the new filler group. At the same time, the replaced filler group needs to be cleaned, and the filler needs to be cleaned and disassembled manually, which greatly increases the workload of the workers and also affects the work efficiency. Summary of the invention

[0006] The present invention provides a formaldehyde waste liquid treatment device and method, aiming to solve the technical problem that when a filler is clogged and needs to be cleaned, the filler group needs to be unloaded into a feeding assembly, the feeding assembly transports the filler group close to the ground, and a worker replaces a new filler group. At the same time, the replaced filler group needs to be cleaned, and the filler needs to be cleaned and disassembled manually, which greatly increases the workload of the workers and also affects the work efficiency.

[0007] The formaldehyde waste liquid treatment device of the present invention comprises: a filter box, a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are arranged at intervals up and down and are located on a side close to the filter box, a nozzle is installed on one side of the liquid inlet channel, and at least two filter cartridges are also included, the filter cartridge is a frustum structure, and its cross section is a regular polygon structure, multiple filter cartridges are coaxially arranged and horizontally rotated and installed on the inner side of the filter box, the end with the smaller end face of the filter cartridge is located at the liquid inlet channel, an annular cavity is provided between adjacent filter cartridges, and baffles are provided at adjacent corners of two filter cartridges, thereby evenly dividing the annular cavity into a plurality of accommodating cavities, fillers are provided in the accommodating cavities, and the fillers can move in the accommodating cavities during the rotation of the filter cartridge, and the fillers have two relative movement positions, when located in the first position, the fillers are located below the liquid inlet channel and located near the top of the filter cartridge, filtering the falling waste liquid, and when located in the second position, the fillers are located on the side away from the liquid inlet channel and located near the bottom of the filter cartridge, and the nozzle can wash the fillers.

[0008] Beneficial effect: waste liquid enters from the liquid inlet channel, is filtered by the filler in the accommodating chamber, and is discharged from the liquid outlet channel. When the filler is located at the top, since the accommodating chamber is in an inclined state and is located on a lower side of the liquid inlet channel, the filler is gathered on this side to ensure that the passing waste liquid is filtered. As the filter cartridge rotates, when the filler in the accommodating chamber rotates to the bottom, the filler will move along the inclined surface of the accommodating chamber to the side away from the liquid inlet channel, and the nozzle sprays water downward to rinse the filler at the bottom of this side. As the filter cartridge rotates again, the rinsed filler rotates to the top and will roll back to the side close to the liquid inlet channel to filter the waste liquid again. In this cycle, the filler is constantly alternating between filtering the waste liquid and being rinsed, thereby realizing the cleaning of the filler. It can be disassembled without manual intervention without stopping the machine, thereby realizing continuous cleaning of the filler, effectively saving manpower and improving work efficiency.

[0009] Preferably, the liquid inlet channel and the liquid outlet channel are both isosceles trapezoidal structures, and correspond to the accommodating cavity that the filter cartridge rotates to the top.

[0010] The effect is that: since the structure of the filter cartridge is a frustum structure and its cross-section is a polygonal structure, the upper and lower surfaces of each accommodating cavity are also isosceles trapezoidal structures, and the upper liquid inlet channel is set to have the same structure as the lower accommodating cavity and a corresponding isosceles trapezoidal structure, which can enable the waste liquid falling from the liquid inlet channel to fully contact with the filler in the accommodating cavity, avoiding the situation where the falling waste liquid has insufficient contact with the filler, thereby improving the filtering effect.

[0011] Preferably, nozzles are installed on both the front and rear sides of the liquid inlet channel, and the nozzles on both sides are distributed in an eight-shaped shape.

[0012] The effect is that when the filler in the accommodating chamber moves to the other end, impurities filtered out of the waste liquid will inevitably remain on the side wall of the accommodating chamber. When the filter cartridge rotates, if a part of the filter cartridge with residual impurities rotates to the bottom of the liquid inlet channel, that is, corresponding to the upper and lower accommodating chamber being filtered above, the impurities will be brought back into the filtered liquid, affecting the filtering effect. Therefore, the nozzles on the front and rear sides of the liquid inlet channel can continuously flush the outermost parts of the front and rear of the filter cartridge to flush away the impurities attached to the filter cartridge to ensure the filtering effect.

[0013] Preferably, two retractable movable plates are slidably installed in the accommodating chamber, the movable plates are arranged at intervals, the filler is located between the two movable plates, and a driving assembly that cooperates with the movable plates is also provided on the filter cartridge. When the filter cartridge rotates, the two movable plates can be driven to reciprocate along the accommodating chamber through the driving assembly.

[0014] The effect is that the two moving plates can drive the fillers to move, so as to avoid the large friction between the fillers when the fillers move in the accommodating cavity, and fail to realize that all the fillers can move completely to the other side, resulting in part of the material remaining on that side.

[0015] Preferably, telescopic plates are slidably mounted on both sides of the movable plate, one end of the telescopic plate located inside the movable plate is provided with a spring, and the other end of the telescopic plate is slidably matched with the baffle.

[0016] The effect is that since the accommodating cavity is a trapezoidal structure, the telescopic plate keeps in contact with the baffle plate, thereby preventing the filler from leaking out.

[0017] Preferably, the driving assembly includes a driving rod rotatably installed in each accommodating cavity, and a gear is fixedly installed on the end of the driving rod, two movable plates are threadedly engaged with the driving rod, two coaxially arranged outer rings and inner rings are fixedly installed on the side wall of the filter box, and a first rack is provided on the front part of the inner wall of the outer ring, and a second rack is provided on the rear part of the outer peripheral wall of the inner ring, and the gear is located between the outer ring and the inner ring.

[0018] Preferably, a partition is provided in the filter box, and the nozzle is fixedly mounted on the partition.

[0019] Preferably, a formaldehyde waste liquid treatment method, using the formaldehyde waste liquid treatment device described above, comprises the following steps:

[0020] Step 1: waste liquid enters the filter box through the liquid inlet channel;

[0021] Step 2: The filter cartridge rotates, and the filler moves back and forth in the accommodating chamber. When the filler moves to the bottom of the liquid inlet channel, it is just located near the top of the filter cartridge. When the filler moves to the other end, it is just located near the bottom of the filter cartridge.

[0022] Step 3: the waste liquid passes through the filter cartridge located below the liquid inlet channel, the filler in the filter cartridge filters the waste liquid, and the filtered waste liquid is discharged from the liquid outlet channel;

[0023] Step 4: The nozzle continuously sprays water downward to flush the filler below the nozzle.

[0024] The effect is as follows: during operation, waste liquid enters from the liquid inlet channel, is filtered by the filler in the accommodating chamber, and is discharged from the liquid outlet channel. When the filler is located at the top, since the accommodating chamber is in an inclined state, the side of the liquid inlet channel is lower, so the filler is gathered on this side to ensure the filtration of the passing waste liquid. As the filter cartridge rotates, when the filler in the accommodating chamber rotates to the bottom, at this time, the side of the liquid inlet channel is higher, and the filler will move along the inclined surface of the accommodating chamber to the lower side. A plurality of nozzles are provided on one side of the liquid inlet channel along the axial direction of the filter cartridge. The nozzles spray water downward to flush the filler at the bottom of this side. As the filter cartridge rotates again, the flushed filler rotates to the top and will roll back to the side close to the liquid inlet channel to filter the waste liquid again. In this cycle, the filler is constantly alternating between filtering the waste liquid and being flushed, thereby achieving the cleaning of the filler.

[0025] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: waste liquid enters from the liquid inlet channel, is filtered by the filler installed in the accommodating chamber, and is discharged from the liquid outlet channel. Since the accommodating chamber is in an inclined state, the filler will reciprocate on both sides of the accommodating chamber. When the filler is located below the liquid inlet channel, the waste liquid is filtered. When it is located on the other side, the nozzle flushes the filler. In this cycle, the filler continuously alternates between filtering the waste liquid and being flushed, thereby achieving cleaning of the filler. It can be disassembled without stopping the machine and does not require manual intervention, thereby achieving continuous cleaning of the filler, effectively saving manpower and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a stereogram of the present invention.

[0027] Figure 2 It is a front cross-sectional view of the present invention.

[0028] Figure 3 It is a left sectional view of the present invention.

[0029] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0030] Figure 5 It is a schematic structural diagram of the filter cartridge of the present invention.

[0031] Figure 6 It is a cross-sectional view of the filter cartridge of the present invention.

[0032] Figure 7 It is a schematic structural diagram of the driving rod of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the movable plate of the present invention.

[0034] Fig. 9 It is a schematic diagram of the outer ring and the inner ring of the present invention.

[0035] Reference numerals:

[0036] 10. Filter box; 11. Partition; 12. Liquid inlet channel; 13. Liquid outlet channel; 14. Water pump; 15. Nozzle; 16. Drain pipe; 17. Upper chamber; 18. Lower chamber; 20. Left side plate; 21. Right side plate; 22. Filter cartridge; 23. Baffle; 24. Accommodating chamber; 30. Drive rod; 31. Moving plate; 32. Telescopic plate; 33. Gear; 34. Outer ring; 35. Inner ring; 36. First rack; 37. Second rack. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] like Figures 1 to 9 As shown, a specific embodiment of a formaldehyde waste liquid treatment device and method of the present invention includes a filter box 10, a liquid inlet channel 12, a liquid outlet channel 13, a partition 11, a nozzle 15, a filter cartridge 22 and a baffle 23;

[0039] A liquid inlet channel 12 and a liquid outlet channel 13 are vertically arranged near one side of the filter box 10 . Waste liquid can be added through the liquid inlet channel 12 and discharged from the liquid outlet channel 13 .

[0040] The partition 11 is fixedly installed in the filter box 10 . A plurality of nozzles 15 are installed on the partition 11 . The nozzles 15 are distributed around the liquid inlet channel 12 .

[0041] Two filter cartridges 22 are rotatably installed between the liquid inlet channel 12 and the liquid outlet channel 13, and the filter cartridges 22 are arranged horizontally, and the two ends of the filter cartridges 22 are respectively rotatably matched with the two opposite side walls of the filter box 10. Both filter cartridges 22 are frustum structures, and the cross-section is a regular polygon.

[0042] There is an annular cavity between the two filter cartridges 22 , and baffles 23 are provided at the adjacent corners of the two filter cartridges 22 , thereby evenly dividing the annular cavity into a plurality of accommodating cavities 24 , in which fillers are loaded.

[0043] During operation, waste liquid enters from the liquid inlet channel 12, is filtered by the filler installed in the accommodating chamber 24, and is discharged from the liquid outlet channel 13. When the filler is located at the top, since the accommodating chamber 24 is in an inclined state, the side of the liquid inlet channel 12 is lower, so the filler is gathered on this side to ensure that the passing waste liquid is filtered. With the rotation of the filter cartridge 22, when the filler in the accommodating chamber 24 rotates to the bottom, at this time, the side of the liquid inlet channel 12 is higher, and the filler will move along the inclined surface of the accommodating chamber 24 to the lower side. A plurality of nozzles 15 are provided on one side of the liquid inlet channel 12 along the axial direction of the filter cartridge 22. The nozzles 15 spray water downward to flush the filler located at the bottom of this side. With the rotation of the filter cartridge 22 again, the flushed filler rotates to the top and will roll down to the side close to the liquid inlet channel 12 again to filter the waste liquid again. In this cycle, the filler is constantly alternating between filtering the waste liquid and being flushed, thereby achieving cleaning of the filler.

[0044] It should be noted that the filler in this embodiment is quartz sand.

[0045] like Figure 1 , Figure 2 and Figure 3 The partition 11 divides the filter box 10 into an upper chamber 17 and a lower chamber 18. The liquid inlet channel 12 and the liquid outlet channel 13 are located at the center of the filter box 10 near the left end. The liquid inlet channel 12 and the liquid outlet channel 13 are arranged at intervals up and down and correspond to each other, so that the waste liquid can only enter and flow out from the left side of the filter box 10.

[0046] The upper end of the liquid inlet channel 12 extends to the outside of the top of the filter box 10, and the lower end passes through the partition 11 and extends to the lower chamber 18. The upper end of the liquid outlet channel 13 is located in the lower chamber 18, and the lower end extends to the outside of the bottom of the filter box 10.

[0047] The liquid inlet channel 12 and the liquid outlet channel 13 are both isosceles trapezoidal structures, so as to correspond to the frustum structure of the filter cartridge 22 , and enable the waste liquid to fully pass through the filter cartridge 22 .

[0048] The filter cartridge 22 is horizontally rotatably installed in the lower chamber 18 and is located between the liquid inlet channel 12 and the liquid outlet channel 13. The waste liquid enters the inner side of the filter box 10 through the liquid inlet channel 12, and then falls through the filter cartridge 22. It is filtered and adsorbed by the filler on the filter cartridge 22, and the larger particles of impurities are filtered out. Finally, it is discharged from the liquid outlet channel 13 (such as Figure 2 solid arrow on the left of the figure).

[0049] Continue back Figures 2 to 4A left plate 20 and a right plate 21 are rotatably mounted on the left and right opposite side walls in the lower chamber 18, respectively, wherein the left plate 20 is driven by a motor, two filter cartridges 22 are coaxially arranged inside and outside, and both ends of the filter cartridge 22 are fixedly mounted on the left plate 20 and the right plate 21, respectively, so that the motor can drive the two filter cartridges 22 to rotate.

[0050] The filter cartridge 22 is a frustum structure, and its cross section is a regular polygon (such as Figure 5 ), in this embodiment, the cross-section of the filter cartridge 22 is a regular octagonal structure. In other embodiments, it can also be a regular hexagon or a square, etc., and the filter cartridge 22 is made of a mesh metal material.

[0051] The filter cartridge 22 is a frustum structure that allows the accommodating chamber 24 to be inclined, which facilitates the movement of the filler. At the same time, when the filler moves to the cleaning area, the area of ​​the accommodating chamber 24 in this area increases, making the filler more dispersed and improving the cleaning effect of the filler.

[0052] like Figure 4 There is an annular cavity between the two filter cartridges 22, and baffles 23 are provided at the adjacent corners of the two filter cartridges 22. The baffles 23 connect the adjacent corners of the two filter cartridges 22, thereby evenly dividing the annular cavity into a plurality of accommodating cavities 24. Each accommodating cavity 24 is loaded with fillers. It should be noted that the fillers only occupy about half of the accommodating cavity 24 to facilitate its flow in the accommodating cavity 24.

[0053] It is particularly noted that the present invention configures the two filter cartridges 22 to have a regular polygonal cross-section. The reason is that the two relative filtering surfaces of the accommodating chamber 24 are both horizontal. Therefore, the filler will be dispersed more evenly when rolling in the accommodating chamber 24. If the cross-section is a circular structure, the filler will accumulate in the depression, resulting in uneven filtration of the wastewater.

[0054] In this embodiment, the width of the liquid inlet channel 12 and the liquid outlet channel 13, that is, the width of the waste liquid falling on the filter cartridge 22, is slightly larger than the width of a corresponding position of one of the planes on the filter cartridge 22 (such as Figure 3 ), it can ensure that most of the waste liquid can pass through one of the accommodating chambers 24 when it falls, and avoid the width of the waste liquid falling from the liquid inlet channel 12 and the liquid outlet channel 13 being too large, resulting in the waste liquid overflowing from the front and rear sides of the filter cartridge 22 without being fully filtered. At the same time, in this embodiment, the filter cartridge 22 is a mesh structure as a whole, so the waste liquid falling from the liquid inlet channel 12 can directly pass through the filter cartridge 22 and then fall, and it can also avoid the waste liquid falling into the lower chamber 18 and mixing with the flushing water during the rotation of the filter cartridge 22.

[0055] It should be noted that the end of the filter cartridge 22 with a smaller area is located on the side close to the liquid inlet channel 12, so that the filler in the accommodating cavity 24 is always located above the filter cartridge 22 when filtering the waste liquid.

[0056] During operation, as the filter cartridge 22 rotates continuously, when the filler is at the top, the accommodating chamber 24 is in an inclined state and is located at a lower side of the liquid inlet channel 12 (such as Figure 2 ), so the fillers are gathered on this side to ensure that the passing waste liquid is filtered. After the waste liquid is filtered, it passes through the filter cartridge 22 and is discharged from the liquid outlet channel 13. As the filter cartridge 22 rotates, when the fillers in the accommodating chamber 24 rotate to the bottom, at this time, the side of the liquid inlet channel 12 is higher, and the fillers will move along the inclined surface of the accommodating chamber 24 to the lower side. All the fillers will move to the side away from the liquid inlet channel 12 for flushing, and the filtered fillers will be flushed in this alternating cycle.

[0057] Continue back Figure 2 and Figure 3 A plurality of nozzles 15 are installed on the partition 11 on the right side of the liquid inlet channel 12 and on both the front and rear sides. A water pump 14 is installed above the filter box 10. The water pump 14 will fill the upper chamber 17 with water and spray the water out from the nozzles 15 to flush the filter cartridge 22.

[0058] Among them, the nozzle 15 (such as Figure 2 ) can flush the right half of the filter cartridge 22, that is, when the filler in the accommodating chamber 24 rotates to the bottom, at this time, the side located at the liquid inlet channel 12 is higher, and the filler will move along the inclined surface of the accommodating chamber 24 to the lower side, and will move to the right side of the filter cartridge 22. The nozzle 15 on the right side of the liquid inlet channel 12 will flush this part of the filler, and the flushing water will fall to the bottom of the lower chamber 18 and finally be discharged from the drain pipe 16. As the filter cartridge 22 rotates again, the flushed filler rotates to the top and will roll down to the side close to the liquid inlet channel 12 again to filter the waste liquid again, thus completing the cycle.

[0059] A row of nozzles 15 (such as Figure 3 ), and the two rows of nozzles 15 are arranged in an eight-shaped pattern, and the positions of the two rows of nozzles 15 are respectively the positions of the front and rear edges of the filter cartridge 22. That is to say, when the filter cartridge 22 rotates, the nozzles 15 on both sides will respectively wash the front and rear outermost parts of the filter cartridge 22 (such as Figure 3 (indicated by the dashed arrow in the middle).

[0060] The reason is that when the filler in the accommodating chamber 24 moves to the other end, it is inevitable that impurities filtered out of the waste liquid will be left on the side wall of the accommodating chamber 24. When the filter cartridge 22 rotates, if a part of the filter cartridge 22 with remaining impurities rotates to the bottom of the liquid inlet channel 12, that is, it corresponds to the upper and lower accommodating chamber 24 being filtered above, it will cause the impurities to be brought back into the filtered liquid, affecting the filtering effect. Therefore, the nozzles 15 on the front and rear sides of the liquid inlet channel 12 can continuously flush the outermost parts of the front and rear of the filter cartridge 22 to flush away the impurities attached to the filter cartridge 22 to ensure the filtering effect. The flushing water will also fall to the bottom of the lower chamber 18 and finally be discharged from the drain pipe 16.

[0061] Of course, the nozzles 15 on the front and rear sides of the liquid inlet channel 12 can also flush the filler passing thereunder. It is emphasized that the nozzle 15 on the right side of the liquid inlet channel 12 is completely capable of flushing the filler thereunder.

[0062] It should be particularly noted that when the filler is located in the uppermost accommodating chamber 24, the waste liquid is filtered, and the impurities filtered out of the waste liquid will remain in the upper layer of the filler. As the filter cartridge 22 rotates, when the impurities originally at the uppermost layer of the filler move to the bottom of the other end of the filter cartridge 22 as the filter cartridge 22 rotates, the impurities originally at the uppermost layer will now be at the bottom of the filler. Just as the water flow sprayed from the multiple nozzles 15 on one side of the liquid inlet channel 12 passes through the upper filter cartridge 22, the water flow will vertically impact the filler. At this time, the impurities at the bottom of the filler can be easily washed away. At the same time, the nozzles 15 on the front and rear sides of the liquid inlet channel 12 will continuously wash the outermost parts of the front and rear of the filter cartridge 22 to wash away the impurities remaining on the filter cartridge 22 after the filler is moved, thereby ensuring the filtering effect.

[0063] In order to further help the filler in the accommodating chamber 24 to achieve precise movement, the present invention further installs a moving plate 31 and a driving assembly in the accommodating chamber 24 to help the filler move, which will be described in detail below.

[0064] like Figures 6 to 9 Two movable plates 31 are installed in each accommodating cavity 24, and telescopic plates 32 (such as Figure 8 ), a spring (not shown in the figure) is provided at one end of the telescopic plate 32 located on the inner side of the movable plate 31 to help it return to its original position, and the other end of the telescopic plate 32 is slidably matched with the baffle 23, so that an independent small chamber is formed between the two movable plates 31, and the filler is located between the two movable plates 31.

[0065] The driving assembly includes a driving rod 30 rotatably installed in each accommodating cavity 24, one end of the driving rod 30 is rotatably matched with the left side plate 20, and the other end passes through the two movable plates 31 and extends to the outside of the right side plate 21, and the end is fixedly installed with a gear 33. In this embodiment, the driving rod 30 is a reciprocating screw, and the two movable plates 31 are threadedly matched with the driving rod 30. When the driving rod 30 rotates, the two movable plates 31 can be driven to drive the inner filler to reciprocate along the accommodating cavity 24. Since the accommodating cavity 24 is an isosceles trapezoidal structure, the telescopic plate 32 can shrink or extend on the movable plate 31. Since the accommodating cavity 24 is an isosceles trapezoidal structure, the front and rear distance of the movable plate 31 gradually increases or decreases during the movement. The telescopic plate 32 can continuously shrink or extend on the movable plate 31, and always conflicts with the baffles 23 on the front and rear sides of the accommodating cavity 24 to prevent the filler between the two movable plates 31 from leaking out.

[0066] The right side wall of the filter box 10 has a groove in which two coaxially arranged outer rings 34 and inner rings 35 are fixedly installed. The inner ring 35 is located on the inner side of the outer ring 34, and a first rack 36 is provided on the front part of the inner wall of the outer ring 34, and a second rack 37 is provided on the rear part of the outer peripheral wall of the inner ring 35.

[0067] It is particularly noted that the two ends of the first rack 36 are close to the top and bottom of the outer ring 34, but do not reach the top and bottom of the outer ring 34. The same is true for the second rack 37 on the inner ring 35, so when the gear 33 rotates to the top and bottom of the inner ring 35 and the outer ring 34, no rotation occurs.

[0068] All the gears 33 are located between the outer ring 34 and the inner ring 35. When the filter cartridge 22 rotates, the gears 33 are driven to rotate circumferentially in the annular channel between the outer ring 34 and the inner ring 35. When the gears 33 move to the first rack 36 and the second rack 37, they mesh with them, thereby forcing the gears 33 to rotate.

[0069] As the filter cartridge 22 rotates, when the gear 33 rotates to the front side and meshes with the first rack 36, the gear 33 rotates, driving the two movable plates 31 to drive the inner filler to move to one side of the liquid inlet channel 12. At this time, the two movable plates 31 are located at the front side of the filter cartridge 22, and continue to move to one side of the liquid inlet channel 12 at the front side. When the gear 33 is disengaged from the first rack 36, the movable plate 31 drives the filler to just move to the bottom of the liquid inlet channel 12, which is also the top position close to the filter cartridge 22, to filter the waste liquid. At this time, the gear 33 rotates to a distance at the top without rotating. This period of time ensures that the filler continues to pass directly below the liquid inlet channel 12 to filter the waste liquid. 2 continues to rotate. When the gear 33 rotates to the rear side, it meshes with the second rack 37, and the gear 33 reverses, driving the two moving plates 31 to move to the side away from the liquid inlet channel 12. In other words, the two moving plates 31 continue to move to the side away from the liquid inlet channel 12 at the rear side of the filter cartridge 22. When the gear 33 is disengaged from the second rack 37, the two moving plates 31 drive the filler to move just below the right nozzle 15, which is also the position close to the bottom of the filter cartridge 22. At this time, the gear 33 rotates to a distance at the bottom without rotating. This period of time ensures that the filler is fully cleaned. As the filter cartridge 22 continues to rotate, all the gears 33 rotate in this way, and this cycle is repeated.

[0070] The working principle of the present invention is as follows: waste liquid enters the filter box 10 through the liquid inlet channel 12, and the motor drives the two filter cartridges 22 to rotate at the same time. As the filter cartridge 22 rotates, when the gear 33 rotates to the front side and meshes with the first rack 36, the gear 33 rotates, driving the two movable plates 31 to move to one side of the liquid inlet channel 12. When the gear 33 is disengaged from the first rack 36, the movable plate 31 drives the filler to move just below the liquid inlet channel 12, which is also the uppermost position close to the filter cartridge 22, to filter the waste liquid. At this time, the gear 33 rotates to The top section does not rotate, and during this period of time, the filler continues to pass directly below the liquid inlet channel 12 to filter the waste liquid. As the filter cartridge 22 continues to rotate, when the gear 33 rotates to the rear side, it meshes with the second rack 37, and the gear 33 reverses, driving the two moving plates 31 to move to the side away from the liquid inlet channel 12. When the gear 33 disengages from the second rack 37, the two moving plates 31 drive the filler to move just below the right nozzle 15, which is also the position close to the bottom of the filter cartridge 22. At this time, the gear 33 rotates to The bottom section does not rotate, and this period of time ensures that the filler is fully cleaned. As the filter cartridge 22 continues to rotate, all gears 33 rotate in this way, and the cycle continues. When the filler is located in the uppermost accommodating chamber 24, the waste liquid is filtered, and the impurities filtered out of the waste liquid will remain in the upper layer of the filler. As the filter cartridge 22 rotates, when the impurities originally at the top of the filler move to the bottom of the other end of the filter cartridge 22 with the rotation of the filter cartridge 22, that is, the impurities originally located at the top layer, At this time, it will be at the bottom layer of the packing. After the water flow sprayed from the multiple nozzles 15 on one side of the liquid inlet channel 12 passes through the upper filter cartridge 22, the water flow will vertically impact the packing. At this time, the impurities located at the bottom of the packing can be easily washed away. At the same time, the nozzles 15 on the front and rear sides of the liquid inlet channel 12 will continuously wash the front and rear outermost parts of the filter cartridge 22 to wash away the impurities remaining on the filter cartridge 22 after the packing is moved, thereby ensuring the filtering effect. Finally, the water that has washed the packing will also fall to the bottom of the lower chamber 18 and finally be discharged from the drain pipe 16.

[0071] According to a formaldehyde waste liquid treatment device of an embodiment of the present invention, the treatment method thereof comprises the following steps:

[0072] Step 1, the waste liquid enters the filter box 10 through the liquid inlet channel 12;

[0073] Step 2: The motor drives the filter cartridge 22 to rotate. As the filter cartridge 22 rotates, when the gear 33 rotates to the front side and meshes with the first rack 36, the gear 33 rotates, driving the two movable plates 31 to move to one side of the liquid inlet channel 12. When the gear 33 disengages from the first rack 36, the movable plate 31 drives the filler to move just below the liquid inlet channel 12, which is also the uppermost position close to the filter cartridge 22, to filter the waste liquid. At this time, the gear 33 rotates to a distance at the top without rotating. This period of time ensures that the filler continues to pass directly below the liquid inlet channel 12 to filter the waste liquid. The cylinder 22 continues to rotate. When the gear 33 rotates to the rear side, it meshes with the second rack 37, and the gear 33 reverses, driving the two movable plates 31 to move to the side away from the liquid inlet channel 12. When the gear 33 disengages from the second rack 37, the two movable plates 31 drive the filler to move just below the right nozzle 15, which is also the position close to the bottom of the filter cylinder 22. At this time, the gear 33 rotates to a distance at the bottom without rotating. This period of time ensures that the filler is fully cleaned. As the filter cylinder 22 continues to rotate, all the gears 33 rotate in this way, and this cycle continues.

[0074] Step 3: When the filter cartridge 22 rotates, the nozzles 15 on the front and rear sides of the liquid inlet channel 12 will respectively flush the outermost accommodating chambers 24 on the front and rear sides of the filter cartridge 22 to flush away the impurities remaining in the accommodating chambers 24;

[0075] In step 4, the flushing water will also fall to the bottom of the lower chamber 18 and finally be discharged from the drain pipe 16.

[0076] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A formaldehyde waste liquid treatment device, comprising: A filter box (10), a liquid inlet channel (12) and a liquid outlet channel (13); the feature being that the liquid inlet channel (12) and the liquid outlet channel (13) are arranged vertically and spaced apart and are located on a side close to the filter box (10); a nozzle (15) is installed on one side of the liquid inlet channel (12); A partition (11) is provided in the filter box (10), and a nozzle (15) is fixedly mounted on the partition (11). A plurality of nozzles (15) are mounted on the partition (11) on the right side of the liquid inlet channel (12) and on both the front and rear sides. It also comprises at least two filter cartridges (22), the filter cartridges (22) being of a frustum structure and having a cross-section of a regular polygonal structure, the plurality of filter cartridges (22) being coaxially arranged and horizontally rotatably mounted on the inner side of the filter box (10), and the end of the filter cartridge (22) having a smaller end surface is located at the liquid inlet channel (12); An annular cavity is provided between adjacent filter cartridges (22), and baffles (23) are provided at adjacent corners of two filter cartridges (22), thereby evenly dividing the annular cavity into a plurality of accommodating cavities (24). Fillers are provided in the accommodating cavities (24). During the rotation of the filter cartridge (22), the fillers can move in the accommodating cavities (24). The fillers have two relative movement positions. When in the first position, the fillers are located below the liquid inlet channel (12) and near the top of the filter cartridge (22), filtering the falling waste liquid. When in the second position, the fillers are located on a side away from the liquid inlet channel (12) and near the bottom of the filter cartridge (22), and the nozzle (15) can flush the fillers.

2. A formaldehyde waste liquid treatment device according to claim 1, characterized in that: The liquid inlet channel (12) and the liquid outlet channel (13) are both isosceles trapezoidal structures, and correspond to the accommodating cavity (24) at the top of the filter cartridge (22) when it is rotated.

3. A formaldehyde waste liquid treatment device according to claim 1, characterized in that: Nozzles (15) are installed on both the front and rear sides of the liquid inlet channel (12), and the nozzles (15) on both sides are distributed in an eight-shaped pattern.

4. A formaldehyde waste liquid treatment device according to claim 1, characterized in that: Two retractable movable plates (31) are slidably mounted in the accommodating chamber (24). The movable plates (31) are arranged at intervals, and the filler is located between the two movable plates (31). The filter cartridge (22) is also provided with a driving assembly that cooperates with the movable plates (31) in transmission. When the filter cartridge (22) rotates, the driving assembly can drive the two movable plates (31) to reciprocate along the accommodating chamber (24).

5. A formaldehyde waste liquid treatment device according to claim 4, characterized in that: Telescopic plates (32) are slidably mounted on both sides of the movable plate (31); one end of the telescopic plate (32) located inside the movable plate (31) is provided with a spring; the other end of the telescopic plate (32) is slidably matched with the baffle plate (23).

6. A formaldehyde waste liquid treatment device according to claim 4, characterized in that: The driving assembly comprises a driving rod (30) rotatably mounted in each accommodating cavity (24), and a gear (33) is fixedly mounted on the end of the driving rod (30), two movable plates (31) are threadedly engaged with the driving rod (30), two coaxially arranged outer rings (34) and inner rings (35) are fixedly mounted on the side wall of the filter box (10), a first rack (36) is arranged on the front side portion of the inner side wall of the outer ring (34), a second rack (37) is arranged on the rear side portion of the outer peripheral wall of the inner ring (35), and the gear (33) is located between the outer ring (34) and the inner ring (35).

7. A method for treating formaldehyde waste liquid, characterized in that: The formaldehyde waste liquid treatment device according to claim 1 comprises the following steps: Step 1: waste liquid enters the filter box (10) through the liquid inlet channel (12); Step 2: the filter cartridge (22) rotates, and the filler reciprocates in the accommodating chamber (24). When the filler moves to the bottom of the liquid inlet channel (12), it is just located near the top of the filter cartridge (22). When the filler moves to the other end, it is just located near the bottom of the filter cartridge (22); Step 3, the waste liquid passes through the filter cartridge (22) located below the liquid inlet channel (12), the filler in the filter cartridge (22) filters the waste liquid, and the filtered waste liquid is discharged from the liquid outlet channel (13); Step 4: The nozzle (15) continuously sprays water downward to flush the filler below the nozzle (15).

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