Printing wastewater treatment device

Abstract

The present invention relates to the field of wastewater treatment technology, and in particular to an environmentally friendly printing wastewater treatment device. It includes an inlet pipe and a suction pipe installed on a box body, and a scraping assembly arranged on the box body, the box body is provided with a reaction pool, and the reaction pool is provided with a shell and a sliding cylinder; the shell is provided with a first hole and a second hole, the shell is provided with a symmetrically distributed partition, and the shell divides the reaction pool into two cavities; the sliding cylinder is provided with a third hole and a fourth hole, and the sliding cylinder slides in the shell. The present invention allows the wastewater to be discharged through the second hole and the fourth hole only after flocculation treatment. When there is untreated wastewater in the sliding cylinder, the second hole and the fourth hole are not connected, and the wastewater containing impurities will not be discharged, thereby reducing the impurity content in the discharged wastewater, thereby ensuring the quality of the wastewater extracted by the suction pipe, and thus ensuring the effect of wastewater treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to an environmentally friendly printing wastewater treatment device. Background Art

[0002] Printing wastewater treatment is an indispensable part of water pollution control and management. The management of printing wastewater is directly related to the improvement of water environment quality and the sustainable development of enterprises. Printing wastewater treatment equipment is an important environmental protection equipment in the printing process. The wastewater generated during the printing process contains a large amount of pollutants such as ink particles, heavy metal ions, organic solvents and suspended impurities. Its composition is complex and the COD and chroma content are high. If it is discharged directly without effective treatment, it will cause serious harm to the ecological environment. Traditional printing wastewater treatment mostly adopts filtration, flocculation and sedimentation processes, but there are still many technical bottlenecks in actual application.

[0003] Currently, common treatment devices mostly use static reaction tanks to flocculate wastewater. It is necessary to inject wastewater and flocculant into the reaction tank, wait for the wastewater reaction to be completed, extract the reacted wastewater, and then clean the reaction tank before the next wave of wastewater can be treated. This makes the existing wastewater treatment steps cumbersome. However, wastewater will be continuously produced during the printing process, and the existing static reaction tank cannot continuously treat the wastewater. If the wastewater is injected into the reaction tank and the treated wastewater is extracted from the reaction tank at the same time, some of the newly injected wastewater will be extracted without being treated, resulting in a high level of impurities in the wastewater, affecting the effect of wastewater treatment. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides an environmentally friendly printing wastewater treatment device.

[0005] The technical solution is: an environmentally friendly printing wastewater treatment device, comprising a water inlet pipe and a water extraction pipe installed in a box body, and a scraping assembly provided on the box body for scraping impurities therein, the box body is provided with a reaction pool, and the reaction pool is provided with a shell and a sliding cylinder;

[0006] The shell is provided with a first hole and a second hole, and the shell is provided with symmetrically distributed partitions, the shell divides the reaction tank into two cavities, the water inlet pipe and the first hole are both connected to the same cavity of the reaction tank, and the water withdrawal pipe and the second hole are both connected to the other cavity of the reaction tank;

[0007] The sliding cylinder is provided with a third hole and a fourth hole, and the sliding cylinder slides in the outer shell to control the communication state between the third hole and the first hole and the communication state between the fourth hole and the second hole. The vertical distance between the third hole and the fourth hole is greater than the vertical distance between the second hole and the first hole.

[0008] Furthermore, the scraping assembly includes a power part, which is installed on the box body. The box body is rotatably connected to the scraping part near the reaction tank. The scraping part is located above the reaction tank. The power part is used to drive the scraping part to rotate. The box body is provided with a guide surface located below the scraping part. The height of the upper part of the shell near the scraping part is lower than the height near the water pump pipe.

[0009] Furthermore, the sliding cylinder is rotatably connected to a filter plate, which is provided with a plurality of filter holes. A retaining frame is provided in the outer shell and is located under the filter plate. The retaining frame is used to block the filter plate. The filter plate is located between the fourth hole and the third hole.

[0010] Furthermore, the shell is rotatably connected to an elastic telescopic rod, the shell is fixedly connected to a motor, the motor output shaft is fixedly connected to the fixed part of the elastic telescopic rod, the telescopic part and the fixed part of the elastic telescopic rod are both provided with stirring blades, and the telescopic part of the elastic telescopic rod is slidably connected to the filter plate.

[0011] Furthermore, the stirring blade fan of the telescopic part of the elastic telescopic rod is fixed with several collecting shells distributed in the circumferential direction, and the side of the collecting shell away from the rotation axis of the stirring blade fan is in contact with the sliding cylinder. The collecting shell is provided with an opening on the side facing its rotation direction, and the side of the collecting shell away from the upper opening is provided with several through holes. The collecting shell is slidably connected to a sealing plate for sealing its opening, and the filter plate is used to squeeze all the sealing plates so that the sealing plates move upward.

[0012] Furthermore, a plurality of flow guides distributed at intervals are provided on the lower side of the blocking plate.

[0013] Furthermore, a guide surface is provided on the lower side of the collecting shell.

[0014] Furthermore, a scraper is fixedly connected to the upper side of the collecting shell, and the scraper is in contact with the inner wall of the sliding cylinder. The scraper is used to scrape impurities on the inner wall of the sliding cylinder.

[0015] Furthermore, the stirring blade fan of the telescopic part on the elastic telescopic rod slides at its upper limit, the telescopic part of the elastic telescopic rod is slidably connected to the limiting block, an elastic member is fixed between the limiting block and the telescopic part of the elastic telescopic rod, the limiting block is provided with inclined surfaces symmetrically distributed up and down, the filter plate is used to squeeze the limiting block, a limiting groove is provided in the filter plate, the limiting groove is used to limit the limiting block, the limiting groove is provided with inclined surfaces symmetrically distributed up and down, the vertical distance between the filter plate and the collecting shell is X, the vertical distance between the limiting groove and the limiting block is Y, X<Y.

[0016] Furthermore, the filter holes of the filter plate are inclined.

[0017] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The present invention allows wastewater to be discharged through the second and fourth holes only after flocculation treatment. When there is untreated wastewater in the sliding cylinder, the second and fourth holes are disconnected, and wastewater containing impurities is not discharged, thereby reducing the amount of impurities in the discharged wastewater, thereby ensuring the quality of the wastewater extracted by the suction pipe and thus ensuring the effect of wastewater treatment;

[0018] 2. The filter plate is driven to move by the sliding cylinder. When the sliding cylinder moves, the filter plate isolates and gathers the flocculants and suspended impurities on the upper side, thereby reducing the impurity content in the treated wastewater on the lower side of the filter plate, further ensuring the effect of wastewater treatment;

[0019] 3. The limit block is limited by the limit groove to adjust the rotation state of the filter plate. When the filter plate is not rotating, the sediment on the surface of the filter plate is collected by the rotation of the collection shell to reduce the probability of the filter plate being blocked. The collection shell rotates during the up and down movement to collect impurities suspended in the wastewater, reducing the amount of impurities in the wastewater, thereby reducing the blocking effect of impurities in the wastewater on the flocculant to ensure the efficiency of wastewater treatment. When the filter plate rotates, the wastewater on the lower side of the filter plate flows upward relative to its filter hole, and the filter hole of the filter plate is backwashed to reduce the probability of the filter hole on the filter plate being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a three-dimensional structural sectional view of the box body of the present invention;

[0022] Figure 3 is a sectional view of the three-dimensional structure of the housing of the present invention;

[0023] Figure 4 Schematic diagram of the three-dimensional structure of the filter plate of the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the stirring blade fan of the present invention;

[0025] Figure 6 Schematic diagram of the three-dimensional structure of the collecting shell of the present invention;

[0026] Figure 7 Schematic diagram of the three-dimensional structure of the blocking plate of the present invention;

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the limit block of the present invention.

[0028] Markings in the accompanying drawings: 1: box body, 101: water inlet pipe, 102: water suction pipe, 103: scraper assembly, 1031: power part, 1032: scraper part, 1033: guide surface, 104: reaction tank, 2: shell, 201: first hole, 202: second hole, 203: partition, 3: sliding cylinder, 31: electric control push rod, 32: connecting frame, 301: third hole, 302: fourth hole, 4: filter plate, 401: baffle, 5: elastic telescopic rod, 51: motor, 6: stirring blade fan, 7: collecting shell, 8: sealing plate, 801: guide part, 9: guide surface, 10: scraper, 11: limit block, 12: limit groove. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0030] Example 1

[0031] This embodiment discloses an environmentally friendly printing wastewater treatment device for treating printing wastewater.

[0032] like Figures 1-4As shown, it includes a water inlet pipe 101 and a water extraction pipe 102 installed on the box body 1, and a scraping assembly 103 provided on the box body 1 for scraping impurities therein. The box body 1 is provided with a control terminal, and the box body 1 is provided with a reaction tank 104. The water inlet pipe 101 is connected to a water supply pump, and the water extraction pipe 102 is connected to a water extraction pump. The water supply pump and the water extraction pump are both electrically connected to the control terminal. The water inlet pipe 101 is used to supply printing wastewater to the right part of the reaction tank 104, and the water extraction pipe 102 is used to extract the treated wastewater from the left part of the reaction tank 104. 104 is provided with a shell 2 and a sliding cylinder 3, the box body 1 is fixed with an electric control push rod 31 electrically connected to the control terminal, and the telescopic part of the electric control push rod 31 is fixed with the sliding cylinder 3 through a connecting frame 32; the shell 2 is provided with a first hole 201 and a second hole 202, and the shell 2 is provided with a partition 203 symmetrically distributed front and back. The shell 2 divides the reaction pool 104 into two cavities on the left and right. The water inlet pipe 101 and the first hole 201 are both connected to the right cavity of the reaction pool 104, and the water extraction pipe 102 and the second hole 202 are both connected to the reaction pool 104. The left cavity is connected; the sliding cylinder 3 is provided with a third hole 301 and a fourth hole 302, the third hole 301 is located on the right side of the sliding cylinder 3, and the fourth hole 302 is located on the left side of the sliding cylinder 3. The sliding cylinder 3 slides in the housing 2 to control the communication state of the third hole 301 with the first hole 201 and the communication state of the fourth hole 302 with the second hole 202. The vertical distance between the third hole 301 and the fourth hole 302 is greater than the vertical distance between the second hole 202 and the first hole 201. The second hole 202 and The vertical distance between the fourth holes 302 is greater than the vertical height of the third hole 301. When the lower side of the sliding cylinder 3 is in contact with the lower side of the shell 2, the first hole 201 is connected to the third hole 301. At this time, the second hole 202 is blocked by the sliding cylinder 3, and the fourth hole 302 is blocked by the shell 2. When the sliding cylinder 3 moves upward (the moving distance is the vertical height of the third hole 301), the first hole 201 and the third hole 301 lose communication. After the sliding cylinder 3 continues to move upward, the second hole 202 is connected to the fourth hole 302.

[0033] like Figure 1-Figure 3As shown, the scraper assembly 103 includes a power piece 1031 electrically connected to the control terminal, the power piece 1031 is installed on the housing 1, and the housing 1 is rotatably connected to the position of the reaction tank 104 with a scraper 1032, and the scraper 1032 is located above the reaction tank 104. The power piece 1031 can be an electric motor and a pulley belt, and the scraper 1032 consists of a rotating shaft and a plurality of scraper plates distributed circumferentially. The power piece 1031 is used to drive the scraper 1032 to rotate, and the housing 1 is provided with a guide surface 1033 located below the scraper 1032, and the scraper 1032 is located above the left side of the guide surface 1033. The guide surface 1033 gradually tilts downward from left to right, and the height of the upper right side of the outer shell 2 is lower than the height of the upper left side. The lower side of the scraper 1032 is at the same horizontal height as the upper right side of the outer shell 2.

[0034] like Figure 4 and Figure 5 As shown, the sliding cylinder 3 is rotatably connected to the filter plate 4, and the filter plate 4 is provided with a plurality of filter holes. A retaining frame 401 is provided in the outer shell 2 and is located at the lower side of the filter plate 4. The retaining frame 401 is used to block the filter plate 4. The filter plate 4 is located between the fourth hole 302 and the third hole 301. The filter plate 4 is used to filter impurities in the printing wastewater to block the impurities on the upper side of the filter plate 4.

[0035] like Figure 3-Figure 5 As shown, the outer shell 2 is rotatably connected to the elastic telescopic rod 5, and the outer shell 2 is fixed with a motor 51 electrically connected to the control terminal. The output shaft of the motor 51 is fixedly connected to the fixed part of the elastic telescopic rod 5, and the telescopic part and the fixed part of the elastic telescopic rod 5 are both provided with stirring blades 6. During the wastewater treatment process, the output shaft of the motor 51 drives all the stirring blades 6 to rotate through the elastic telescopic rod 5 to stir and mix the wastewater and flocculant, and the telescopic part of the elastic telescopic rod 5 is extended and retracted, so that the stirring blades 6 on the telescopic part of the elastic telescopic rod 5 move up and down to stir each layer of the wastewater, and the telescopic part of the elastic telescopic rod 5 is slidably connected to the filter plate 4.

[0036] The working process of the printing wastewater treatment device in this embodiment is as follows:

[0037] Initially:

[0038] The first hole 201 is connected to the third hole 301 , and the lower side of the filter plate 4 is in contact with the upper side of the retaining frame 401 .

[0039] The process of using this device:

[0040] When it is necessary to use this device to treat wastewater, the operator injects the printing wastewater into the right cavity of the reaction tank 104 through the water supply pump and the water inlet pipe 101. At this time, the operator continues to add flocculant to the wastewater in the right cavity of the reaction tank 104 according to the flow rate of the wastewater. After the horizontal plane of the right cavity in the reaction tank 104 is flush with the first hole 201, the wastewater carries the flocculant through the first hole 201 and the third hole 301 into the sliding cylinder 3. The wastewater is blocked by the filter plate 4 and the baffle 401. The operator turns on the motor 51 through the control terminal. The output shaft of the motor 51 drives all the stirring blades 6 to rotate through the elastic telescopic rod 5 to stir the wastewater and flocculant.

[0041] During the flocculation of wastewater in the sliding cylinder 3, when the water level in the sliding cylinder 3 is higher than the height of the upper right side thereof, the operator turns on the power part 1031 through the control terminal. The power part 1031 drives the scraping part 1032 to rotate. The scraping part 1032 scrapes the impurities on the surface of the wastewater to the guide surface 1033. Part of the wastewater drives the surface impurities to flow from the guide surface 1033 from left to right. The operator collects part of the wastewater and surface impurities flowing to the right side of the guide surface 1033, and injects the collected wastewater into the sliding cylinder 3 again for secondary treatment.

[0042] After the wastewater reacts with the flocculant in the sliding cylinder 3 to cause flocculation, the operator turns on the electric control push rod 31 through the control terminal. The telescopic portion of the electric control push rod 31 drives the sliding cylinder 3 to move upward through the connecting frame 32, and the sliding cylinder 3 drives the filter plate 4 to move upward. When the sliding cylinder 3 moves upward until the first hole 201 and the third hole 301 lose communication, the wastewater in the cavity on the right side of the reaction tank 104 temporarily no longer enters the sliding cylinder 3. After the sliding cylinder 3 continues to move upward, the second hole 202 is connected to the fourth hole 302, the sliding cylinder 3 drives the filter plate 4 to move upward, and the blocking frame 401 no longer blocks the filter plate 4. The operator turns off the electric control push rod 31 through the control terminal. At this time, the sliding cylinder 3 undergoes flocculation reaction. The corresponding wastewater passes through the filter plate 4, the fourth hole 302 and the second hole 202, and the wastewater after flocculation flows into the left cavity of the reaction tank 104. Before the water level in the left cavity of the reaction tank 104 is flush with the water level in the sliding cylinder 3, the operator uses the water pump and the water pipe 102 to extract the treated wastewater in the left cavity of the reaction tank 104. Finally, the control terminal controls the telescopic part of the electric push rod 31 to extend and reset, and the telescopic part of the electric push rod 31 drives the sliding cylinder 3 to move downward through the connecting frame 32, so that the second hole 202 and the fourth hole 302 are no longer connected, and the first hole 201 and the third hole 301 are connected again, and so on. The above steps are repeated continuously to treat the wastewater.

[0043] During the wastewater treatment process, the wastewater is subjected to flocculation treatment before being discharged to the left cavity of the reaction tank 104 through the second hole 202 and the fourth hole 302. When there is untreated wastewater in the sliding cylinder 3, the second hole 202 and the fourth hole 302 are not connected, and the wastewater containing impurities will not enter the left cavity of the reaction tank 104, thereby reducing the impurity content in the discharged wastewater, thereby ensuring the quality of the wastewater extracted by the pumping pipe 102, thereby ensuring the effect of wastewater treatment, and when the sliding cylinder 3 moves upward, the sliding cylinder 3 drives the filter plate 4 to move upward, and the filter plate 4 blocks the impurities on its upper side. The filter plate 4 isolates the settled flocculants and suspended impurities on the upper side of the filter plate 4 to reduce the impurity content in the treated wastewater on the lower side of the filter plate 4, thereby further ensuring the effect of wastewater treatment.

[0044] During the upward movement of the filter plate 4, the filter plate 4 will drive the telescopic part of the elastic telescopic rod 5 to move upward, and the telescopic part of the elastic telescopic rod 5 will drive the lower stirring blade 6 to move upward. When the filter plate 4 moves downward and resets, the telescopic part of the elastic telescopic rod 5 extends and resets, and the telescopic part of the elastic telescopic rod 5 drives the lower stirring blade 6 to move downward, changing the stirring position of the lower stirring blade 6, and evenly stirring the positions of each layer of the wastewater to improve the efficiency of mixing the wastewater and the flocculant.

[0045] When the operator needs to stop using the device, the operator no longer injects wastewater and flocculant, and then turns off the motor 51 and the power part 1031 through the control terminal, and controls the telescopic part of the electric control push rod 31 to move and reset through the control terminal, and then turns off the electric control push rod 31, and evacuates the wastewater in the sliding cylinder 3 and the reaction tank 104, and finally cleans the device for the next use.

[0046] Example 2

[0047] The environmentally friendly printing wastewater treatment device disclosed in this embodiment, based on the first embodiment, also has the function of collecting sediments and suspended matter in the wastewater.

[0048] like Figure 4-Figure 7 As shown, the stirring blade 6 of the telescopic part of the elastic telescopic rod 5 is fixedly connected with a plurality of collecting shells 7 distributed circumferentially. The side of the collecting shell 7 away from the rotation axis of the stirring blade 6 is in contact with the sliding cylinder 3. The side of the collecting shell 7 facing the rotation direction is provided with an opening to Figure 1The top view is the rotation reference, the stirring impeller 6 rotates clockwise, the opening of the collecting shell 7 is located in its clockwise direction, and several through holes are provided on the counterclockwise side of the collecting shell 7. The collecting shell 7 is slidably connected with a sealing plate 8 for sealing its opening, and the lower side of the sealing plate 8 is provided with several guide parts 801 distributed at intervals. The sealing plate 8 is a heavy block. When the filter plate 4 moves upward, the filter plate 4 squeezes all the sealing plates 8 to make the sealing plates 8 move upward, and the collecting shell 7 is no longer blocked by the sealing plate 8. The wastewater carries impurities on the surface of the filter plate 4 through several guide parts 801 into the collecting shell 7. A guide surface 9 is provided on the lower side of the collecting shell 7. When the lower stirring impeller 6 rotates, the lower stirring impeller 6 drives all the collecting shells 7 to rotate, and the guide surface 9 is used to introduce impurities on the surface of the filter plate 4 into the collecting shell 7.

[0049] like Figure 5 and Figure 6 As shown, a scraper 10 is fixed to the upper side of the collecting shell 7, and the scraper 10 is in contact with the inner wall of the sliding cylinder 3. When the collecting shell 7 rotates, the collecting shell 7 drives the scraper 10 to rotate, and the scraper 10 scrapes impurities on the inner wall of the sliding cylinder 3.

[0050] The working process of this embodiment is similar to that of the first embodiment and is described in detail as follows:

[0051] During the rotation of the lower stirring impeller 6, when the filter plate 4 moves upward to fit with the several guide parts 801, as the filter plate 4 moves upward, the several guide parts 801 are pressed upward, causing the blocking plate 8 to move upward, and the collecting shell 7 is no longer blocked by the blocking plate 8. Then the filter plate 4 fits with the collecting shell 7. As the collecting shell 7 rotates, the wastewater carries the impurities on the surface of the filter plate 4 and enters the collecting shell 7 through the guide surface 9. Then the water flow carries the impurities on the surface of the filter plate 4 through between the several guide parts 801 and enters the collecting shell 7. The impurities are trapped in the collecting shell 7. The water flow is discharged from the collecting shell 7 through the several through holes of the collecting shell 7. The sediment on the surface of the filter plate 4 is collected by the collecting shell 7, reducing the probability of the filter plate 4 being blocked.

[0052] During the rotation of the collecting shell 7 , the collecting shell 7 drives the scraper 10 to rotate, and the scraper 10 scrapes impurities on the inner wall of the sliding cylinder 3 to reduce the amount of impurities adhering to the inner wall of the sliding cylinder 3 so as to facilitate subsequent cleaning of the sliding cylinder 3 .

[0053] During the up and down movement of the stirring impeller 6 , the stirring impeller 6 drives the collecting shell 7 to move. The collecting shell 7 rotates during the up and down movement to collect impurities suspended in the wastewater.

[0054] When the filter plate 4 moves downward and resets, the blocking plate 8 moves downward and resets under the influence of its own gravity, and the blocking plate 8 blocks the collection shell 7.

[0055] When the operator needs to stop using the device, the operator resets and cleans the device according to the steps of the above embodiment, and cleans the collection shell 7 and the upper parts newly added in this embodiment.

[0056] Example 3

[0057] This embodiment discloses an environmentally friendly printing wastewater treatment device, which is further improved on the basis of Example 2.

[0058] like Figure 8 As shown, the stirring blade 6 of the telescopic portion of the elastic telescopic rod 5 slides at its upper limit, and the telescopic portion of the elastic telescopic rod 5 is slidably connected to the limit block 11. An elastic member is fixed between the limit block 11 and the telescopic portion of the elastic telescopic rod 5, wherein the elastic member is a compression spring, and the limit block 11 is provided with inclined surfaces symmetrically distributed up and down. The filter plate 4 is used to squeeze the limit block 11, and a limit groove 12 is provided in the filter plate 4. The limit groove 12 is used to limit the limit block 11, and the limit groove 12 is provided with inclined surfaces symmetrically distributed up and down. When the filter plate 4 passes the limit block 11, the filter plate 4 squeezes the limit block 11, so that the elastic member of the limit block 11 is compressed After the limit block 11 is aligned with the limit groove 12, the elastic part of the limit block 11 rebounds, so that the limit block 11 is stuck in the limit groove 12. The telescopic part of the elastic telescopic rod 5 can drive the filter plate 4 to rotate through the limit block 11 when rotating. The vertical distance between the filter plate 4 and the collecting shell 7 is X, and the vertical distance between the limit groove 12 and the limit block 11 is Y. X<Y. After the filter plate 4 moves to fit with the collecting shell 7, the limit block 11 has not yet been inserted into the limit groove 12. Taking the number of collecting shells 7 as an example, the limit block 11 will be inserted into the limit groove 12 only after the collecting shell 7 rotates at least 120° on the surface of the filter plate 4.

[0059] like Figure 6 As shown, the filter holes of the filter plate 4 are inclined, and the inclination direction of the filter holes from top to bottom is the same as the rotation direction of the collection shell 7. During the rotation of the filter plate 4, water flows into the filter holes of the filter plate 4.

[0060] The working process of this embodiment is similar to that of the second embodiment and is described in detail as follows:

[0061] After filter plate 4 is in the process of moving upward, filter plate 4 slides upward relative to the telescopic part of elastic telescopic rod 5, filter plate 4 first squeezes and drives guide part 801 to move upward, and then drives collecting shell 7 to move upward. When filter plate 4 starts to drive collecting shell 7 to move upward, collecting shell 7 rotates relative to filter plate 4. At this time, collecting shell 7 is in contact with filter plate 4, and collecting shell 7 collects impurities deposited on the surface of filter plate 4 through the steps of the above embodiment. When most of the impurities on the upper surface of filter plate 4 are collected by all collecting shells 7, as filter plate 4 continues to move upward, filter plate 4 drives lower stirring impeller 6 to move upward through collecting shell 7. Stirring impeller 6 slides upward relative to the telescopic part of elastic telescopic rod 5, and filter plate 4 continues to move upward until it contacts with limit block 11. Filter plate 4 squeezes the inclined surface on the lower side of limit block 11, so that the elastic part of limit block 11 is compressed. After limit block 11 is aligned with limit groove 12, the elastic part of limit block 11 pops out, and limit block 11 is stuck in limit groove 12.

[0062] When the limiting block 11 is inserted into the limiting groove 12 , the telescopic portion of the elastic telescopic rod 5 drives the filter plate 4 to rotate through the limiting block 11 and the limiting groove 12 during the rotation process.

[0063] When the filter plate 4 moves downward to reset, the telescopic part of the elastic telescopic rod 5 drives the filter plate 4 to rotate through the limit block 11 and the limit groove 12, and the filter plate 4 rotates relative to the sliding cylinder 3. Since the inclination direction of the filter holes of the filter plate 4 from top to bottom is the same as the rotation direction of the collection shell 7, during the process of the filter plate 4 rotating and moving downward, the filter plate 4 squeezes the wastewater on its lower side, so that the wastewater on the lower side of the filter plate 4 flows upward relative to its filter holes, and the filter holes of the filter plate 4 are backwashed to reduce the probability of the filter holes on the filter plate 4 being blocked.

[0064] After the filter plate 4 moves downward and the telescopic part of the elastic telescopic rod 5 extends and resets to the limit state, the filter plate 4 continues to move downward through the inclined surface of the limit groove 12 to squeeze the inclined surface of the limit block 11, so that the limit block 11 moves laterally, the elastic part of the limit block 11 is compressed, and then the limit block 11 disengages from the limit groove 12, the elastic part of the limit block 11 rebounds and drives it to reset, and then the filter plate 4 moves downward until it begins to disengage from the lower collecting shell 7, and the stirring impeller 6 and the collecting shell 7 slide downward and reset under the influence of gravity.

[0065] When the operator needs to stop using the device, the operator resets and cleans the device according to the above steps.

[0066] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A printing wastewater treatment device, comprising a water inlet pipe (101) and a water extraction pipe (102) installed on a box (1), and a scraping assembly (103) provided on the box (1) for scraping impurities therein, wherein the box (1) is provided with a reaction tank (104), characterized in that: The reaction pool (104) is provided with a housing (2) and a sliding cylinder (3); The shell (2) is provided with a first hole (201) and a second hole (202), and the shell (2) is provided with symmetrically distributed partitions (203). The shell (2) divides the reaction pool (104) into two cavities. The water inlet pipe (101) and the first hole (201) are both connected to the same cavity of the reaction pool (104), and the water extraction pipe (102) and the second hole (202) are both connected to the other cavity of the reaction pool (104); The sliding cylinder (3) is provided with a third hole (301) and a fourth hole (302), and the sliding cylinder (3) slides in the housing (2) to control the communication state between the third hole (301) and the first hole (201) and the communication state between the fourth hole (302) and the second hole (202), and the vertical distance between the third hole (301) and the fourth hole (302) is greater than the vertical distance between the second hole (202) and the first hole (201); The sliding cylinder (3) is rotatably connected to a filter plate (4), and the filter plate (4) is provided with a plurality of filter holes. A retaining frame (401) is provided in the housing (2) and is located on the lower side of the filter plate (4). The retaining frame (401) is used to block the filter plate (4), and the filter plate (4) is located between the fourth hole (302) and the third hole (301); The housing (2) is rotatably connected to an elastic telescopic rod (5), the housing (2) is fixedly connected to a motor (51), an output shaft of the motor (51) is fixedly connected to a fixed portion of the elastic telescopic rod (5), both the telescopic portion and the fixed portion of the elastic telescopic rod (5) are provided with stirring blades (6), and the telescopic portion of the elastic telescopic rod (5) is slidably connected to the filter plate (4).

2. A printing wastewater treatment device according to claim 1, characterized in that: The scraping assembly (103) includes a power member (1031), which is installed on the housing (1). The housing (1) is rotatably connected to a scraping member (1032) at a position close to the reaction pool (104). The scraping member (1032) is located above the reaction pool (104). The power member (1031) is used to drive the scraping member (1032) to rotate. The housing (1) is provided with a guide surface (1033) located below the scraping member (1032). The height of the upper portion of the housing (2) close to the scraping member (1032) is lower than the height close to the water pump (102).

3. A printing wastewater treatment device according to claim 1, characterized in that: The stirring blade (6) of the telescopic portion of the elastic telescopic rod (5) is fixedly connected with a plurality of circumferentially distributed collecting shells (7), the side of the collecting shell (7) away from the rotation axis of the stirring blade (6) is in contact with the sliding cylinder (3), the side of the collecting shell (7) facing the rotation direction thereof is provided with an opening, the side of the collecting shell (7) away from the upper opening thereof is provided with a plurality of through holes, the collecting shell (7) is slidably connected with a blocking plate (8) for blocking its opening, and the filter plate (4) is used to squeeze all the blocking plates (8) so that the blocking plates (8) move upward.

4. A printing wastewater treatment device according to claim 3, characterized in that: A plurality of flow guide portions (801) distributed at intervals are provided on the lower side of the blocking plate (8).

5. The printing wastewater treatment device according to claim 3, characterized in that: A flow guide surface (9) is provided on the lower side of the collecting shell (7).

6. A printing wastewater treatment device according to claim 5, characterized in that: A scraper (10) is fixedly connected to the upper side of the collecting shell (7), and the scraper (10) is in contact with the inner wall of the sliding cylinder (3). The scraper (10) is used to scrape impurities on the inner wall of the sliding cylinder (3).

7. A printing wastewater treatment device according to claim 6, characterized in that: The stirring blade (6) of the telescopic portion of the elastic telescopic rod (5) slides at its upper limit position, the telescopic portion of the elastic telescopic rod (5) is slidably connected to a limit block (11), an elastic member is fixedly connected between the limit block (11) and the telescopic portion of the elastic telescopic rod (5), the limit block (11) is provided with inclined surfaces symmetrically distributed up and down, the filter plate (4) is used to squeeze the limit block (11), a limit groove (12) is provided in the filter plate (4), the limit groove (12) is used to limit the limit block (11), the limit groove (12) is provided with inclined surfaces symmetrically distributed up and down, the vertical distance between the filter plate (4) and the collection shell (7) is X, the vertical distance between the limit groove (12) and the limit block (11) is Y, and X<Y.

8. The printing wastewater treatment device according to claim 7, characterized in that: The filter holes of the filter plate (4) are inclined.

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