Multilayer classified filtration type sewage impurity separation equipment

Abstract

The invention discloses multi-layer classified filtering type sewage impurity separation equipment, and belongs to the technical field of impurity separation, the multi-layer classified filtering type sewage impurity separation equipment comprises a rotary impurity classified filtering assembly and a rotary driving mechanism, the upper end and the lower end of the rotary impurity classified filtering assembly are rotatably installed on a first sewage flow channel and a second sewage flow channel which are placed in a fall mode respectively; the rotary driving mechanism is fixedly mounted at the bottom of the sewage flow channel I located at the upper part and drives the rotary impurity classifying and filtering assembly to rotate at a constant speed; sewage in the equipment can enter an annular inlet cavity I, an annular inlet cavity II and an annular inlet cavity III in a layered manner, and various floating, suspending and sinking and floating impurities in the sewage can be sequentially separated through an annular impurity removal cavity I, an annular impurity removal cavity II and an annular impurity removal cavity III, so that different impurities in the sewage can be conveniently classified, detected and analyzed in the later stage; and secondly, by continuously rotating the filtering drum, the accumulation of impurities at a single position of the filtering drum is avoided, and a better filtering and separating effect can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of impurity separation, and in particular to a multi-layer classification filtering type sewage impurity separation device. Background Art

[0002] Sewage filtration and separation equipment is a type of environmental protection equipment in the field of water pollution control. It treats sewage by filtering to remove impurities.

[0003] At present, since impurities in sewage are divided into floating matter, suspended matter and sinking and floating matter, when the impurities are detected and analyzed later, they are usually classified and detected according to whether the impurities are floating matter, suspended matter or sinking and floating matter in the sewage. The existing sewage filtration and separation equipment can separate impurities in sewage by intercepting multiple fixed filters inside it; however, the impurities after filtration will be concentrated in one body, which is not conducive to the subsequent classification of impurities; secondly, impurities are easily accumulated on the surface of the filter, thereby affecting the filtering effect of the filter. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multi-layer classification filtering sewage impurity separation equipment. The sewage in the equipment will enter the annular entrance chamber one, the annular entrance chamber two and the annular entrance chamber three in layers. The various impurities floating, suspended and sinking in the sewage can be separated in turn through the annular impurity removal chamber one, the annular impurity removal chamber two and the annular impurity removal chamber three, which is convenient for the later classification detection and analysis of different impurities in the sewage; secondly, by continuously rotating the filter drum, the accumulation of impurities at a single position of the filter drum is avoided, and a better filtering and separation effect can be achieved.

[0005] To solve the above technical problems, the technical solution of the present invention is achieved as follows:

[0006] A multi-layer classification filtering sewage impurity separation device comprises a rotary impurity classification filtering assembly and a rotary drive mechanism, wherein the upper and lower ends of the rotary impurity classification filtering assembly are respectively rotatably mounted on a sewage flow channel 1 and a sewage flow channel 2 which are placed at a height difference, and the rotary drive mechanism is fixedly mounted on the bottom of the sewage flow channel 1 located above and drives the rotary impurity classification filtering assembly to rotate at a constant speed;

[0007] The rotary impurity classification filter assembly comprises a filter drum 1, a filter drum 2 and a filter drum 3 which are evenly arranged from the inside to the outside, and a vertically arranged annular impurity removal chamber 1, annular impurity removal chamber 2 and annular impurity removal chamber 3 are evenly spaced from the inside to the outside between each two adjacent filter drums, and an annular impurity removal chamber 1, annular impurity removal chamber 2 and annular impurity removal chamber 3 are horizontally arranged above the annular impurity removal chamber 1, annular impurity removal chamber 2 and annular impurity removal chamber 3 which are connected to each other; a sewage outlet is opened at the inner bottom of the annular impurity removal chamber 1, annular impurity removal chamber 2 and annular impurity removal chamber 3, and a clean impurity sealing mechanism is installed at each sewage outlet;

[0008] The annular inlet chamber 1, the annular inlet chamber 2 and the annular inlet chamber 3 are arranged equidistantly from top to bottom, and the total height of the three is equal to the flow channel height in the sewage flow channel 1.

[0009] By adopting the above scheme, the sewage in the equipment will enter the annular entrance chamber one, the annular entrance chamber two and the annular entrance chamber three in layers. Through the annular impurity removal chamber one, the annular impurity removal chamber two and the annular impurity removal chamber three, various floating, suspended and sinking impurities in the sewage can be separated in turn, which is convenient for the later classification detection and analysis of different impurities in the sewage; secondly, by continuously rotating the filter drum, the accumulation of impurities at a single position of the filter drum is avoided, and a better filtering and separation effect can be achieved.

[0010] As a preferred embodiment of a multi-layer classification filtration sewage impurity separation device, the upper and lower ends of the rotary impurity classification filtration component are respectively installed in a sealed rotation manner with sewage flow channel one and sewage flow channel two through at least two sets of mutually parallel annular slide rails.

[0011] By adopting the above scheme, in order to ensure good sealing during rotation, at least two sets of mutually parallel annular slide rails are used for rotation, which also avoids leakage of sewage during rotation.

[0012] As a preferred embodiment of a multi-layer classification filtering sewage impurity separation device, a plurality of connecting plates vertically arranged and distributed in a circumferential array are fixed between the annular inlet chamber one, the annular inlet chamber two and the annular inlet chamber three.

[0013] By adopting the above scheme, in order to enhance the overall stability of the rotary impurity classification and filtering assembly, the rigidity and strength of the connection can be improved through the connecting plate, thereby enhancing the overall stability of the rotary impurity classification and filtering assembly.

[0014] As a preferred embodiment of a multi-layer classification filtration sewage impurity separation device, the clean impurity sealing mechanism includes a sealing seat, which is located at the bottom of the annular impurity removal chamber and matches the shape of the bottom of the annular impurity removal chamber; the sealing seat is mounted on a cleaning brush which is vertically arranged and always fits the surface of the filter drum, and one side of the cleaning brush is fixed to a guide shaft parallel to the cleaning brush through a connecting rib, and the sealing seat can slide up and down along the cleaning brush and the guide shaft; a spring is mounted on the guide shaft to push the sealing seat downward, and the sealing seat can completely block the sewage outlet under the elastic push of the spring.

[0015] By adopting the above scheme, in order to realize the sealing function of the clean impurity sealing mechanism, the sealing seat can completely seal the sewage outlet under the elastic push of the spring 1, thereby avoiding the leakage of sewage.

[0016] As a preferred embodiment of a multi-layer classification filtering sewage impurity separation device, the clean impurity sealing mechanism also includes an elastic airbag fixed below the sealing seat, a built-in air injection nozzle is installed at the bottom of the elastic airbag, and an air injection port is opened on the air injection nozzle; an air core is installed at the air injection port, and the air core is slidably installed on a guide shaft 2 fixed inside the elastic airbag, and a spring 2 is installed on the guide shaft 2 to push the air core to slide toward the location of the air injection port, and the air core can completely block the air injection port under the elastic push of the spring 2;

[0017] The elastic airbag is filled with an inert gas such as nitrogen through an air injection nozzle, and the volume of the elastic airbag expands as the air pressure increases; wherein the diameter of the elastic airbag after being filled with the inert gas is equal to the diameter of the sewage outlet and the width of the annular impurity removal cavity;

[0018] Annular slideways are fixed to the outer bottoms of the annular impurity removal chambers 1, 2 and 3, and the annular slideways are disconnected at the sewage outlet; a strong magnet block is slidably installed inside the annular slideway, a handle is fixed to the bottom of the strong magnet block, and a strong magnet ring that can be magnetically attracted to the strong magnet block is placed inside the elastic airbag 1; when the strong magnet block is moved along the annular slideway, the elastic airbag and the cleaning brush can move along the annular impurity removal chamber under the action of magnetic attraction.

[0019] By adopting the above scheme, in order to realize the function of cleaning impurities and brushing the filter screen of the cleaning impurity sealing mechanism, the elastic airbag is inflated so that the diameter of the elastic airbag after being filled with inert gas is equal to the diameter of the sewage outlet and the width of the annular impurity removal cavity, the elastic airbag is pressed upward and the spring 1 is compressed so that the elastic gas as a whole completely enters the annular impurity removal cavity; then the strong magnet block is matched with the strong magnet ring, and when the strong magnet block is moved along the annular slide, the elastic airbag and the cleaning brush can move along the annular impurity removal cavity under the action of magnetic attraction, and after the elastic airbag and the cleaning brush have circled the annular impurity removal cavity, all the impurities on the surface of the filter screen are brushed and fall, and all the impurities are discharged from the sewage outlet.

[0020] As a preferred embodiment of a multi-layer classification filtering sewage impurity separation device, the rotary drive mechanism includes a positioning seat fixed at the bottom of a sewage flow channel, a motor is installed on the positioning seat, a driving gear is concentrically connected to the rotating shaft of the motor, a driven gear is fixed on the outside of the rotary impurity classification filtering component, the driving gear and the driven gear are located on the same horizontal plane and are driven by a gear chain; wherein the diameter of the driven gear is larger than the diameter of the driving gear.

[0021] By adopting the above scheme, in order to realize the rotation of the rotary impurity classification and filtering assembly, the active gear is driven to rotate by the motor, and the driven gear disc is rotated at a uniform speed under the meshing transmission of the tooth chain, thereby driving the rotary impurity classification and filtering assembly to rotate at a uniform speed.

[0022] After adopting the above technical solution, the beneficial effects of the present invention are:

[0023] 1. The sewage in the equipment will enter the annular inlet chamber 1, annular inlet chamber 2 and annular inlet chamber 3 in layers. The floating, suspended and sinking impurities in the sewage can be separated in sequence through the annular impurity removal chamber 1, annular impurity removal chamber 2 and annular impurity removal chamber 3, which is convenient for the later classification detection and analysis of different impurities in the sewage; secondly, by continuously rotating the filter drum, the accumulation of impurities at a single position of the filter drum is avoided, and a better filtering and separation effect can be achieved;

[0024] 2. In order to ensure good sealing during rotation, at least two sets of parallel annular slide rails are used for rotation, which can also avoid leakage of sewage during rotation;

[0025] 3. In order to enhance the overall stability of the rotary impurity classification and filtering assembly, the connection rigidity and strength can be improved through the connection plate, thereby enhancing the overall stability of the rotary impurity classification and filtering assembly;

[0026] 4. In order to realize the function of cleaning impurities and cleaning the filter screen of the clean impurity sealing mechanism, inflate the elastic airbag so that the diameter of the elastic airbag after filling with inert gas is equal to the diameter of the sewage outlet and the width of the annular impurity removal cavity, press the elastic airbag upward and compress the spring 1, so that the elastic gas as a whole completely enters the annular impurity removal cavity; then the strong magnet block is matched with the strong magnet ring, and when the strong magnet block is moved along the annular slideway, the elastic airbag and the cleaning brush can move along the annular impurity removal cavity under the action of magnetic attraction. After the elastic airbag and the cleaning brush go around the annular impurity removal cavity, all the impurities on the surface of the filter screen are cleaned and brushed down, and all the impurities are discharged from the sewage outlet;

[0027] 5. In order to realize the rotation of the rotary impurity classification and filtering component, the active gear is driven to rotate by the motor, and the driven gear disc is driven by the meshing transmission of the tooth chain to realize the uniform rotation of the driven gear disc, thereby driving the rotary impurity classification and filtering component to rotate at a uniform speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 The three-dimensional structure of the present invention applied to the sewage flow channel Figure 1 ;

[0030] Figure 2 The three-dimensional structure of the present invention applied to the sewage flow channel Figure 2 ;

[0031] Figure 3 For display Figure 2 A three-dimensional diagram of the internal structure when sewage flows;

[0032] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0033] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0034] Figure 6 The three-dimensional structure of the present invention Figure 1 ;

[0035] Figure 7 The three-dimensional structure of the present invention Figure 2 ;

[0036] Figure 8 for Figure 6A three-dimensional structural diagram of the rotary impurity classification and filtering component;

[0037] Fig. 9 For display Figure 8 The three-dimensional structure diagram of the interior during sewage filtration;

[0038] Fig.10 for Fig. 9 A local three-dimensional structural diagram;

[0039] Fig.11 for Fig.10 A three-dimensional structural diagram of the medium-clean impurity sealing mechanism;

[0040] Fig.12 For display Fig.11 A three-dimensional structural diagram of the interior;

[0041] Fig.13 for Fig.12 A partial enlarged view of point C in the middle;

[0042] Fig.14 For display Figure 8 The three-dimensional structure of the interior when cleaning impurities Figure 1 ;

[0043] Fig.15 for Fig.14 A local three-dimensional structural diagram;

[0044] Fig.16 For display Figure 8 The three-dimensional structure of the interior when cleaning impurities Figure 2 ;

[0045] Fig.17 for Fig.16 A partial enlarged view of point D in the middle;

[0046] Fig.18 for Figure 6 A three-dimensional structural diagram of the rotary drive mechanism;

[0047] Markings in the figure: 1-sewage flow channel one; 2-sewage flow channel two; 3-filter drum one; 4-filter drum two; 5-filter drum three; 6-annular impurity removal chamber one; 7-annular impurity removal chamber two; 8-annular impurity removal chamber three; 9-annular entry chamber one; 10-annular entry chamber two; 11-annular entry chamber three; 12-drainage outlet; 13-annular slide rail; 14-connecting plate; 15-sealing seat; 16-cleaning brush; 17-connecting rib; 18-guide shaft one; 19-spring one; 20-elastic airbag; 21-air injection nozzle; 22-air injection port; 23-air core; 24-guide shaft two; 25-spring two; 26-annular slide rail; 27-strong magnet block; 28-handle; 29-strong magnet ring; 30-positioning seat; 31-motor; 32-driving gear; 33-driven gear disc; 34-tooth chain. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figures 1 to 9 As shown, a multi-layer classification filtering sewage impurity separation device comprises a rotary impurity classification filtering assembly and a rotary drive mechanism, wherein the upper and lower ends of the rotary impurity classification filtering assembly are respectively rotatably mounted on a sewage flow channel 1 and a sewage flow channel 2 which are placed at a height difference, and the rotary drive mechanism is fixedly mounted on the bottom of the sewage flow channel 1 located above and drives the rotary impurity classification filtering assembly to rotate at a constant speed;

[0050] The rotary impurity classification filter assembly comprises a filter drum 1 3, a filter drum 2 4 and a filter drum 3 5 which are evenly arranged from the inside to the outside, and between each two adjacent filter drums, there are vertically arranged annular impurity removal chamber 1 6, annular impurity removal chamber 2 7 and annular impurity removal chamber 3 8 which are evenly spaced from the inside to the outside, and annular impurity removal chamber 1 9, annular impurity removal chamber 2 7 and annular impurity removal chamber 3 8 are horizontally arranged above the annular impurity removal chamber 1 6, the annular impurity removal chamber 2 7 and the annular impurity removal chamber 3 8, which are connected to each other; a sewage outlet 12 is opened at the inner bottom of the annular impurity removal chamber 1 6, the annular impurity removal chamber 2 7 and the annular impurity removal chamber 3 8, and a clean impurity sealing mechanism is installed at each sewage outlet 12;

[0051] The annular inlet chamber 1 9 , the annular inlet chamber 2 10 and the annular inlet chamber 3 11 are arranged equidistantly from top to bottom, and the total height of the three is equal to the flow channel height in the sewage flow channel 1 .

[0052] The sewage in the equipment will enter the annular inlet chamber 1 9, the annular inlet chamber 2 10 and the annular inlet chamber 3 11 in layers, and various impurities floating, suspended and sinking in the sewage can be separated in turn through the annular impurity removal chamber 1 6, the annular impurity removal chamber 2 7 and the annular impurity removal chamber 3 8, which is convenient for the later separation, detection and analysis of different impurities in the sewage; secondly, by continuously rotating the filter drum, the accumulation of impurities at a single position of the filter drum is avoided, and a better filtering and separation effect can be achieved.

[0053] like Figures 4 to 5As shown, the upper and lower ends of the rotary impurity classification filter assembly are respectively installed in a sealed manner with the sewage flow channel 1 1 and the sewage flow channel 2 2 through at least two sets of mutually parallel annular slide rails 13. In order to ensure good sealing while rotating, at least two sets of mutually parallel annular slide rails 13 are used for rotation, which also prevents sewage leakage while rotating.

[0054] like Figure 8 As shown, a plurality of connecting plates 14 are fixedly arranged vertically and distributed in a circumferential array between the annular inlet chamber 1 9, the annular inlet chamber 2 10 and the annular inlet chamber 3 11. In order to enhance the overall stability of the rotary impurity classification and filtering assembly, the rigidity and strength of the connection can be improved by the connecting plates 14, thereby enhancing the overall stability of the rotary impurity classification and filtering assembly.

[0055] like Figures 10 to 13 As shown, the clean impurity sealing mechanism includes a sealing seat 15, which is located at the bottom of the annular impurity removal chamber and matches the shape of the bottom of the annular impurity removal chamber; the sealing seat 15 is mounted on a cleaning brush 16 which is vertically arranged and always fits the surface of the filter drum, and one side of the cleaning brush 16 is fixed to a guide shaft 18 which is parallel to the cleaning brush 16 through a connecting rib 17, and the sealing seat 15 can slide up and down along the cleaning brush 16 and the guide shaft 18; the guide shaft 18 is mounted with a spring 19 which pushes the sealing seat 15 to move downward, and the sealing seat 15 can completely block the sewage outlet 12 under the elastic push of the spring 19. In order to realize the blocking function of the clean impurity sealing mechanism, the sealing seat 15 can completely block the sewage outlet 12 under the elastic push of the spring 19, thereby avoiding the leakage of sewage.

[0056] like Figures 14 to 17 As shown, the clean impurity sealing mechanism also includes an elastic airbag 20 fixed below the sealing seat 15, a built-in air injection nozzle 21 is installed at the bottom of the elastic airbag 20, and an air injection port 22 is opened on the air injection nozzle 21; an air core 23 is installed at the air injection port 22, and the air core 23 is slidably installed on a guide shaft 24 fixed inside the elastic airbag 20, and a spring 25 is installed on the guide shaft 24 to push the air core 23 to slide toward the location of the air injection port 22, and the air core 23 can completely block the air injection port 22 under the elastic push of the spring 25;

[0057] The elastic airbag 20 is filled with an inert gas such as nitrogen through the air injection nozzle 21, and the volume of the elastic airbag 20 expands with the increase of the air pressure; wherein the diameter of the elastic airbag 20 after being filled with the inert gas is equal to the diameter of the sewage outlet 12 and the width of the annular impurity removal cavity;

[0058] An annular slide 26 is fixed to the outer bottom of the annular impurity removal chamber 1 6, the annular impurity removal chamber 2 7 and the annular impurity removal chamber 3 8, and the annular slide 26 is disconnected at the sewage outlet 12; a strong magnet block 27 is slidably installed inside the annular slide 26, a handle 28 is fixed to the bottom of the strong magnet block 27, and a strong magnet ring 29 that can be magnetically attracted to the strong magnet block 27 is placed inside the elastic air bag 20; when the strong magnet block 27 is moved along the annular slide 26, the elastic air bag 20 and the cleaning brush 16 can move along the annular impurity removal cavity under the action of magnetic attraction.

[0059] In order to realize the function of cleaning impurities and brushing the filter screen of the cleaning impurity sealing mechanism, the elastic airbag 20 is inflated so that the diameter of the elastic airbag 20 after being filled with inert gas is equal to the diameter of the sewage outlet 12 and the width of the annular impurity removal cavity, the elastic airbag 20 is pressed upward and the spring 19 is compressed so that the elastic gas as a whole completely enters the annular impurity removal cavity; then the strong magnet block 27 is matched with the strong magnet ring 29, and when the strong magnet block 27 is moved along the annular slide 26, the elastic airbag 20 and the cleaning brush 16 can move along the annular impurity removal cavity under the action of magnetic attraction, and after the elastic airbag 20 and the cleaning brush 16 go around the annular impurity removal cavity 16 for 6 circles, all the impurities on the surface of the filter screen are brushed and fall, and all the impurities are discharged from the sewage outlet 12.

[0060] like Fig.18 As shown, the rotary drive mechanism includes a positioning seat 30 fixed at the bottom of the sewage flow channel 1, a motor 31 is installed on the positioning seat 30, a driving gear 32 is coaxially connected to the rotating shaft of the motor 31, a driven toothed disc 33 is fixed on the outside of the rotary impurity classification filter component, the driving gear 32 and the driven toothed disc 33 are located on the same horizontal plane and are meshed and driven by a toothed chain 34; wherein the diameter of the driven toothed disc 33 is larger than the diameter of the driving gear 32. In order to realize the rotation of the rotary impurity classification filter component, the driving gear 32 is driven to rotate by the motor 31, and under the meshing transmission of the toothed chain 34, the driven toothed disc 33 is rotated at a uniform speed, thereby driving the rotary impurity classification filter component to rotate at a uniform speed.

[0061] Working principle of the present invention:

[0062] During application, since the impurities in the sewage in the sewage channel 1 include floating matter, suspended matter and sinking and floating matter, the floating matter, suspended matter and sinking and floating matter impurities will follow the water flow into the annular entry chamber 1 9, the annular entry chamber 2 10 and the annular entry chamber 3 11 in turn, and then fall into the annular impurity removal chamber 1 6, the annular impurity removal chamber 2 7 and the annular impurity removal chamber 3 8. At this time, the floating impurities will remain in the annular impurity removal chamber 1 6, the suspended impurities will remain in the annular impurity removal chamber 2 7, and the sinking and floating impurities will remain in the annular impurity removal chamber 3 8. The filtered water body will enter the sewage channel 2 2 and continue to flow; at this time, all kinds of impurities such as floating matter, suspended matter and sinking and floating matter in the sewage are classified and stored, which is convenient for later classification detection and analysis of different impurities in the sewage.

[0063] During the above-mentioned sewage filtration process, the motor 31 drives the driving gear 32 to rotate, and under the meshing transmission of the toothed chain 34, the driven gear disc 33 rotates at a uniform speed, thereby driving the rotary impurity classification filter assembly to rotate at a uniform speed, thereby avoiding the accumulation of impurities at a single position of the filter drum, and achieving a better filtering and separation effect.

[0064] When the above-mentioned sewage filter is cleaning impurities, air is inflated into the elastic airbag 20 so that the diameter of the elastic airbag 20 after being filled with inert gas is equal to the diameter of the sewage outlet 12 and the width of the annular impurity removal cavity, and then the elastic airbag 20 is pressed upward and the spring 19 is compressed so that the elastic gas as a whole completely enters the annular impurity removal cavity; then, the strong magnet block 27 is matched with the strong magnet ring 29, and when the strong magnet block 27 is moved along the annular slide 26, the elastic airbag 20 and the cleaning brush 16 can move along the annular impurity removal cavity under the action of magnetic attraction. After the elastic airbag 20 and the cleaning brush 16 go around the annular impurity removal cavity for 6 circles, all the impurities on the surface of the filter screen are brushed off and all the impurities are discharged from the sewage outlet 12, which makes it more convenient and quick to clean the impurities.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layer classification filtering sewage impurity separation device, comprising a rotary impurity classification filtering assembly and a rotary drive mechanism, wherein the upper and lower ends of the rotary impurity classification filtering assembly are respectively rotatably mounted on a sewage flow channel 1 (1) and a sewage flow channel 2 (2) which are placed at a height difference, and the rotary drive mechanism is fixedly mounted on the bottom of the sewage flow channel 1 (1) located above and drives the rotary impurity classification filtering assembly to rotate at a constant speed; Features: The rotary impurity classification filter assembly comprises a filter drum 1 (3), a filter drum 2 (4) and a filter drum 3 (5) which are evenly arranged in sequence from the inside to the outside; between each two adjacent filter drums, there are vertically arranged annular impurity removal chamber 1 (6), annular impurity removal chamber 2 (7) and annular impurity removal chamber 3 (8) which are evenly spaced in sequence from the inside to the outside; above the annular impurity removal chamber 1 (6), annular impurity removal chamber 2 (7) and annular impurity removal chamber 3 (8), annular inlet chamber 1 (9), annular inlet chamber 2 (10) and annular inlet chamber 3 (11) which are connected to each other are horizontally arranged; the inner bottom of the annular impurity removal chamber 1 (6), annular impurity removal chamber 2 (7) and annular impurity removal chamber 3 (8) are each provided with a sewage outlet (12), and a clean impurity sealing mechanism is installed at each sewage outlet (12); The annular inlet chamber one (9), the annular inlet chamber two (10) and the annular inlet chamber three (11) are arranged equidistantly from top to bottom, and the total height of the three is equal to the flow channel height in the sewage flow channel one (1).

2. The multi-layer classification filtering sewage impurity separation equipment according to claim 1 is characterized by: The upper and lower ends of the rotary impurity classification filter assembly are respectively installed in a sealed manner in rotation with the sewage flow channel 1 (1) and the sewage flow channel 2 (2) through at least two sets of mutually parallel annular slide rails (13).

3. The multi-layer classification filtering sewage impurity separation equipment according to claim 2 is characterized by: A plurality of connecting plates (14) are fixedly arranged vertically and distributed in a circumferential array at intervals between the annular entry chamber 1 (9), the annular entry chamber 2 (10) and the annular entry chamber 3 (11).

4. The multi-layer classification filtering sewage impurity separation equipment according to claim 1 is characterized in that: The clean impurity sealing mechanism comprises a sealing seat (15), the sealing seat (15) being located at the bottom of the annular impurity removal chamber and matching the shape of the bottom of the annular impurity removal chamber; the sealing seat (15) being mounted on a cleaning brush (16) which is arranged vertically and always in contact with the surface of the filter drum; one side of the cleaning brush (16) is fixed to a guide shaft (18) which is parallel to the cleaning brush (16) through a connecting rib (17); and the sealing seat (15) can slide up and down along the cleaning brush (16) and the guide shaft (18); a spring (19) is mounted on the guide shaft (18) for pushing the sealing seat (15) to move downward; and the sealing seat (15) can completely block the sewage outlet (12) under the elastic push of the spring (19).

5. The multi-layer classification filtering sewage impurity separation equipment according to claim 4 is characterized in that: The clean impurity sealing mechanism also includes an elastic airbag (20) fixed below the sealing seat (15); a built-in air injection nozzle (21) is installed at the bottom of the elastic airbag (20); an air injection port (22) is provided on the air injection nozzle (21); an air core (23) is installed at the air injection port (22); the air core (23) is slidably installed on a second guide shaft (24) fixed inside the elastic airbag (20); a second spring (25) is mounted on the second guide shaft (24) for pushing the air core (23) to slide toward the location of the air injection port (22); the air core (23) can completely block the air injection port (22) under the elastic push of the second spring (25).

6. The multi-layer classification filtering sewage impurity separation equipment according to claim 5 is characterized by: The elastic airbag (20) is filled with inert gas through a gas injection nozzle (21), and the volume of the elastic airbag (20) expands as the gas pressure increases.

7. The multi-layer classification filtering sewage impurity separation equipment according to claim 6 is characterized by: The diameter of the elastic airbag (20) after being filled with inert gas is equal to the diameter of the sewage outlet (12) and the width of the annular impurity removal cavity.

8. The multi-layer classification filtering sewage impurity separation equipment according to claim 7 is characterized by: The outer bottoms of the annular impurity removal chamber 1 (6), the annular impurity removal chamber 2 (7) and the annular impurity removal chamber 3 (8) are all fixed with an annular slideway (26), and the annular slideway (26) is disconnected at the location of the sewage outlet (12); a strong magnet block (27) is slidably installed inside the annular slideway (26), a handle (28) is fixed at the bottom of the strong magnet block (27), and a strong magnet ring (29) capable of magnetic attraction with the strong magnet block (27) is placed inside the elastic airbag (20) 1; when the strong magnet block (27) is moved along the annular slideway (26), the elastic airbag (20) and the cleaning brush (16) can move along the annular impurity removal chamber under the action of magnetic attraction.

9. The multi-layer classification filtering sewage impurity separation equipment according to any one of claims 1 to 8, characterized in that: The rotary drive mechanism comprises a positioning seat (30) fixed at the bottom of a sewage flow channel (1), a motor (31) being mounted on the positioning seat (30), a driving gear (32) being coaxially connected to the rotating shaft of the motor (31), a driven gear disc (33) being fixed on the outer side of the rotary impurity classification filter assembly, the driving gear (32) and the driven gear disc (33) being located on the same horizontal plane and meshingly driven by a toothed chain (34).

10. The multi-layer classification filtering sewage impurity separation equipment according to claim 9 is characterized in that: The diameter of the driven gear plate (33) is greater than the diameter of the driving gear (32).

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