CN109665645B

CN109665645B - Wastewater treatment system

Info

Publication number: CN109665645B
Application number: CN201910070292.9A
Authority: CN
Inventors: 郭水忠; 王霞
Original assignee: Hangzhou Dadi Haiyang Environmental Protection Co ltd
Current assignee: Hangzhou Dadi Haiyang Environmental Protection Co ltd
Priority date: 2019-01-24
Filing date: 2019-01-24
Publication date: 2021-11-09
Anticipated expiration: 2039-01-24
Also published as: CN109665645A

Abstract

The invention relates to a wastewater treatment system, which comprises a water storage barrel, a primary filtering device, a secondary filtering device and a membrane shell filter; secondary filter equipment includes upper end open-ended casing, open and close casing open-ended filter cap, set up the filter bag in the casing, the intercommunication has inlet tube and outlet pipe on the casing, the filter bag open end is fixed with the round spacing ring, casing inside is fixed with the support ring of round and spacing ring lower extreme butt, the inlet tube is provided with the filter screen along inlet tube axial displacement in casing one end, the fixed slot has been seted up to filter screen outer wall downside, the mounting groove with the fixed slot intercommunication is seted up to inlet tube and casing downside, sliding connection has the slider of pegging graft in the fixed slot in the mounting groove, displacement in-process orders about the spacing ring part pegs graft in the fixed slot or hide in the mounting groove completely. The invention has the advantages that when the filter bag is replaced, the filter screen can continue to filter water, so that the whole water treatment system can continue to work normally, and the wastewater treatment efficiency is ensured.

Description

Wastewater treatment system

Technical Field

The invention relates to the technical field of waste emulsion tail water treatment, in particular to a wastewater treatment system.

Background

At present, the emulsion is a complex mixture composed of oil, water, surfactant, electrolyte and the like. The waste emulsion is an emulsion which has no use value in production and use, has very high emulsion stability, oil content, COD value, chroma and the like, and simultaneously contains a large amount of surfactant.

The tail water that produces after generally handling useless emulsion still need carry on again to handle the back just can discharge, and the processing procedure generally is for filtering the back through active carbon processing apparatus, carries again to carry out secondary treatment in the membrane shell, adds medicine neutralization according to the interior quality of water requirement of membrane shell simultaneously, makes its tail water reach direct discharge standard.

Because the tail water contains a large amount of silt, the wastewater treated by the active carbon treatment device is generally filtered by a filter device and then conveyed into the membrane shell for treatment, so that the damage of the silt to the inner membrane of the membrane shell is reduced; in the prior art, as shown in fig. 1, a filtering device includes a housing 41 and a filter bag 42 that can be detached from the housing 41, a water inlet pipe 45 is communicated with a position of an outer wall of the housing 41 above the filter bag 42, a water outlet pipe 46 is communicated with a lower end of the housing 41, and wastewater treated by an activated carbon treatment device is introduced into the housing 41 through the water inlet pipe 45, filtered by the filter bag 42, and then conveyed into a membrane shell from the water outlet pipe 46 for further treatment.

The above prior art solutions have the following drawbacks: when utilizing filter bag 42 to filter waste water, waste water is at the in-process that passes filter bag 42, and tiny silt causes the jam to the filtration pore of filter bag 42 easily, need change filter bag 42 when filter bag 42 blocks up, and when changing filter bag 42, need close whole water treatment system, prevent that unfiltered water from directly letting in the membrane shell and causing the damage to the membrane to the treatment effeciency of influence to waste water.

Disclosure of Invention

The invention aims to provide a wastewater treatment system, which has the advantages that when a filter bag is replaced, a filter screen can continue to filter water, so that the whole water treatment system can continue to work normally, and the wastewater treatment efficiency is guaranteed.

The above object of the present invention is achieved by the following technical solutions:

a wastewater treatment system comprises a water storage barrel for storing wastewater, a primary filtering device communicated with the water storage barrel, a secondary filtering device communicated with the primary filtering device and a membrane shell filter communicated with the secondary filtering device, wherein high-pressure pumps are respectively arranged between the water storage barrel and the primary filtering device and between the secondary filtering device and the membrane shell filter; the secondary filter equipment includes upper end open-ended casing, opens and close casing open-ended filter lid, sets up the filter bag in the casing, the intercommunication have with primary filter equipment intercommunication and be in the inlet tube of filter bag top and with the outlet pipe of membrane shell filter intercommunication on the casing, the filter bag open end is fixed with the round spacing ring, casing inside is fixed with the support ring of round and spacing ring lower extreme butt, the inlet tube is in casing one end and is provided with the filter screen along the inlet tube axle linear displacement, the fixed slot has been seted up to filter screen outer wall downside, the mounting groove with the fixed slot intercommunication is seted up to inlet tube and casing downside, sliding connection has the slider of pegging graft in the fixed slot in the mounting groove, displacement in-process orders about the slider part to peg graft in the fixed slot or hide completely in the mounting groove about the spacing ring.

By adopting the technical scheme, the wastewater to be treated is temporarily stored in the water storage barrel, then the wastewater in the water storage barrel is subjected to primary filtration through the primary filtration device and secondary filtration through the secondary filtration device under the driving action of the high-pressure pump, and finally the wastewater is subjected to tertiary filtration through the membrane shell filter, so that the wastewater reaches the discharge standard and can be directly discharged. When the filter bag in the shell is blocked, the filter bag can be taken out for replacement by opening the filter cover, the filter screen can be driven to be inserted in the water inlet pipe and then inserted in the fixed groove through the sliding block part in the process of taking out the filter bag, so that the limiting work of the filter screen is realized, the filter screen can temporarily filter the wastewater, and when the filter bag is replaced, the water treatment system can still treat the wastewater; and then when placing new filter bag in the casing, spacing ring and slider butt on the filter bag order about the slider and slide down, remove the limiting displacement to the filter screen, its filter screen under the impact of waste water, the roll-off is outside the inlet tube, makes in its waste water can directly let in the filter bag, carries out normal filtration work to waste water.

The invention is further configured to: the filter screen lateral wall is fixed with at least two sets of stoppers that are provided with inlet tube axis parallel, the stopper cross-section sets up to the L type, the limiting groove that supplies stopper grafting and linear displacement is seted up along its axis to the stopper that the inlet tube inner wall corresponds.

By adopting the technical scheme, the L-shaped limiting block on the filter screen is matched with the limiting groove in an inserting manner, so that the filter screen can only work along the axis of the water inlet pipe in a displacement manner, and the filter screen can be conveniently inserted into the water inlet pipe or extend to the outer side of the water inlet pipe.

The invention is further configured to: be provided with between mounting groove and the slider and order about the compression spring of slider displacement up, slider lower extreme vertical fixation has one to extend to the inboard gag lever post of casing, set up the sliding tray that supplies the gag lever post displacement from top to bottom and communicate with the mounting groove on the casing, correspond on the support ring and set up the holding tank that supplies the gag lever post grafting.

By adopting the technical scheme, the upper end of the sliding block is driven to extend into the water inlet pipe under the initial state of the compression spring by utilizing the elastic acting force of the compression spring, so that the upper end of the sliding block can be driven to be inserted into the fixed groove of the filter screen without the action of external force, and the limiting work of the filter screen is realized; and then through the fixed gag lever post of slider lower extreme, make its filter bag in-process of displacement down, the gag lever post displacement down is ordered about to the gag lever post lower extreme to order about the slider and hide totally in the mounting groove, remove the spacing work to the filter screen, when making its filter bag install in the casing, the filter screen is in and keeps away from the inlet tube state, and when the filter bag broke away from the casing, the slider restricted filter screen was in the state in the inlet tube, makes its filter work to waste water that keeps all the time.

The invention is further configured to: the slider extends to the inside part of inlet tube and sets up to the direction inclined plane towards one side in the casing.

Through adopting above-mentioned technical scheme, through the direction inclined plane of seting up on the slider, when slider part cunning shifted to the inlet tube in, also when manual order about the filter screen and slide to the inlet tube in, the filter screen produces the inclined plane transmission with the direction inclined plane, orders about the slider displacement down, when the fixed slot and the mounting groove intercommunication of filter screen, the slider is under compression spring's elastic action, and automatic card is gone into in the fixed slot, realizes the spacing work to the filter screen.

The invention is further configured to: the lower end of the filter cover is fixed with a plurality of fixing rods with lower ends abutted to the upper end of the limiting ring, and when the filter cover closes the opening of the shell, the fixing rods drive the limiting ring to abut to the support ring.

Through adopting above-mentioned technical scheme, through the dead lever that strains the lid lower extreme and set up, when it strains the lid and fits on the casing, the dead lever plays the butt effect to the spacing ring, and with spacing butt of spacing ring on the support ring, carries out stable spacing work to the filter bag.

The invention is further configured to: the filter cover is further coaxially and rotatably connected with a lead screw, a cleaning roller is in threaded connection with the lead screw, the cleaning roller is annularly arranged, the outer wall of the cleaning roller is abutted against the inner side of the filter bag, a guide rod parallel to the lead screw is further fixed at the lower end of the filter cover and penetrates through the cleaning roller, and a motor for driving the lead screw to rotate circumferentially is arranged at the upper end of the filter cover.

Through adopting above-mentioned technical scheme, utilize the guide effect of guide bar to the cleaning roller, when making its motor drive lead screw rotate, with the screw-thread fit effect of lead screw and cleaning roller, trun into the vertical motion of ordering about the cleaning roller along the guide bar to make its cleaning roller displacement in-process from top to bottom, clean the filter bag inner wall, clear up silt on the filter bag inner wall, reduce the probability that silt blockked up the filter bag, can prolong the live time of filter bag, reduce the change number of times to the filter bag.

The invention is further configured to: the lower end of the screw rod is provided with a connecting plate, two groups of fastening bolts penetrate through the connecting plate, and the two fastening bolts are respectively in threaded fit with the lower end axis of the screw rod and the guide rod.

Through adopting above-mentioned technical scheme, utilize fastening bolt to realize the relation of being connected of connecting plate simultaneously and lead screw, guide bar lower extreme, and do not influence the rotation work of the relative connecting plate of lead screw, make its connecting plate can prevent that the cleaning roller from breaking away from out the lead screw on the one hand, on the other hand can strengthen the stability between lead screw and the guide bar.

The invention is further configured to: a sleeve is fixed on an output shaft of the motor, a connecting groove for inserting the upper end of the screw rod is formed in the lower end of the sleeve, and the screw rod and the sleeve are locked by the locking bolt penetrating through the sleeve and matching the screw rod with the locking nut.

By adopting the technical scheme, the screw rod is long, the sleeve fixed on the motor and the locking bolt penetrate through the sleeve and the screw rod to be matched with the locking nut in a threaded manner, so that the coaxial rotation matching work of the screw rod and the motor output shaft is realized, and the assembly work of the screw rod and the motor is facilitated.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the filter screen is driven to be limited in the water inlet pipe through displacement of the filter screen along the axis of the water inlet pipe under the insertion and matching action of the sliding blocks, when the filter bag is replaced, the filter screen can temporarily filter the wastewater, so that the water treatment system can still keep running in a normal state without being closed in the process of replacing the filter bag, and the wastewater treatment efficiency of the water treatment system is ensured;

2. through the pushing action of the compression spring on the sliding block and the limiting rod arranged at the lower end of the sliding block, in the process of up-and-down displacement of the limiting ring, the limiting rod is driven to drive the sliding block to move downwards, so that when the filter bag is installed in the shell, the limiting action of the sliding block on the filter screen is kept released, the filter screen is driven to slide out of the water inlet pipe, and the waste water is directly introduced into the filter bag for filtering; when the filter bag is required to be taken out, the filter screen can be inserted into the water inlet pipe, the limiting effect on the limiting rod is relieved by the limiting ring, the sliding block is driven to be inserted into the fixing groove of the filter screen under the elastic action of the compression spring, the filter screen is limited in the water inlet pipe, waste water is filtered, the filter bag can be continuously filtered, and the continuous filtering work of the secondary filtering device is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of the prior art.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic structural view of the secondary filtering apparatus in fig. 2.

Fig. 4 is a schematic cross-sectional view of fig. 3.

Fig. 5 is an enlarged schematic view at a in fig. 4.

Fig. 6 is a schematic cross-sectional view of the filter screen and the water inlet pipe in fig. 2.

In the figure, 1, a water storage barrel; 2. a quartz sand filter; 3. an activated carbon filter; 4. a secondary filtration device; 41. a housing; 42. a filter bag; 43. a filter cover; 44. installing a bolt; 45. a water inlet pipe; 46. a water outlet pipe; 47. a support ring; 5. a membrane shell filter; 6. a high pressure pump; 7. a filter screen; 8. a slider; 9. mounting grooves; 10. fixing grooves; 11. a limiting block; 12. a limiting groove; 13. a compression spring; 14. fixing the rod; 15. a sliding groove; 16. a motor; 17. a sleeve; 18. locking the bolt; 19. a screw rod; 20. a guide bar; 21. a connecting plate; 22. fastening a bolt; 23. a cleaning roller; 24. a limit ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 2 and 3, the wastewater treatment system disclosed by the present invention comprises a water storage tank 1, a primary filtering device, a secondary filtering device 4, a membrane shell filter 5 and a high pressure pump 6; the water storage barrel 1 is provided with two groups which are respectively communicated with the wastewater for storing the wastewater; the primary filtering device comprises a quartz sand filter 2 and an active carbon filter 3; the two water storage barrels 1 are communicated with a quartz sand filter 2 through a pipeline, and the quartz sand filter 2 is communicated with an active carbon filter 3 through a pipeline; the secondary filtering device 4 comprises a shell 41 and a filter bag 42 positioned in the shell 41, the upper end of the shell 41 is communicated with a water inlet pipe 45, the lower end of the shell 41 is communicated with a water outlet pipe 46, the water inlet pipe 45 is communicated with the activated carbon filter 3, and the water outlet pipe 46 is communicated with the membrane shell filter 5. Wherein, be provided with high-pressure pump 6 on pipeline and the inlet tube 45 between water storage bucket 1 and the quartz sand filter 2 respectively, high-pressure pump 6 passes through the electric wire and external power supply intercommunication, and during the circular telegram, high-pressure pump 6 work orders about waste water in the water storage bucket 1 and filters the back through quartz sand filter 2, active carbon filter 3 and filter bag 42 in proper order through the pipeline, carries out final filtration processing after passing through membrane shell filter 5 again, makes its waste water can reach emission standard and directly discharge.

Referring to fig. 3 and 4, the upper end of the casing 41 is open, the opening is opened and closed by the filter cover 43, four mounting bolts 44 are arranged at the upper end of the casing 41 along the circumferential direction, an open slot is respectively formed in the filter cover 43 corresponding to the mounting bolts 44, and the mounting bolts 44 respectively penetrate through the open slot and the casing 41 to be in threaded connection with mounting nuts, so that the filter cover 43 and the casing 41 are detachably fixed.

Referring to fig. 4 and 5, a circle of limiting ring 24 is fixed at the open end of the filter bag 42, and the outer diameter of the limiting ring 24 is equal to the inner diameter of the housing 41; wherein, the inner wall of the casing 41 is located below the water inlet pipe 45 and is further welded and fixed with a circle of support ring 47, and when the lower end of the limit ring 24 is abutted against the upper end of the support ring 47, the upper end of the limit ring 24 is lower than the lower end of the water inlet pipe 45. In this embodiment, four groups of fixing rods 14 are uniformly fixed at the lower end of the filtering cover 43 along the circumferential direction, the fixing rods 14 and the opening of the water inlet pipe 45 are arranged in a staggered manner, and the length of the fixing rods 14 is the distance from the upper end of the limiting ring 24 to the upper end of the housing 41, when the filtering cover 43 is fixed on the housing 41, the fixing rods 14 abut against the upper end of the limiting ring 24, and drive the limiting ring 24 to be stably fixed on the support ring 47.

Referring to fig. 4 and 6, the opening end of the water inlet pipe 45 in the casing 41 is further connected with a filter screen 7 in a sliding manner, the outer diameter of the filter screen 7 is equal to the inner diameter of the water inlet pipe 45, the two sides of the filter screen 7 are respectively welded and fixed with a limiting block 11 arranged along the axis of the water inlet pipe 45, the cross section of the limiting block 11 is in an L shape, the side wall of the water inlet pipe 45 is correspondingly provided with a limiting groove 12 for the insertion of one end of the limiting block 11 and the linear displacement, so that the filter screen 7 can be completely inserted in the water inlet pipe 45 or can be far away from the water inlet pipe 45 for sliding. Referring to fig. 5: the mounting groove 9 that communicates each other is radially seted up along inlet tube 45 on 41 lateral walls of casing and the 45 lateral walls of inlet tube, and the fixed slot 10 with the 9 intercommunications of mounting groove is seted up to 7 outer wall lower extremes of filter screen, and it has slider 8 to peg graft in mounting groove 9, and the displacement in-process about the slider 8 hides completely in mounting groove 9 or the part is pegged graft in fixed slot 10 is inside to be left in mounting groove 9, plays limiting displacement to filter screen 7. In this embodiment, when the fixing groove 10 is communicated with the mounting groove 9, the filter screen 7 is completely positioned in the water inlet pipe 45.

Referring to fig. 5, a compression spring 13 is arranged in the mounting groove 9, the upper end and the lower end of the compression spring 13 are respectively fixed with the lower end of the mounting groove 9 and the lower end of the slide block 8, and the slide block 8 is kept to partially slide into the water inlet pipe 45 in an initial state; a limiting rod is vertically fixed at the lower end of the sliding block 8, and one end of the limiting rod extends into the shell 41; the side wall of the shell 41 is correspondingly provided with a sliding groove 15 which is communicated with the mounting groove 9 and is used for the limiting rod to move up and down; in this embodiment, the upper end of the support ring 47 is correspondingly provided with an accommodating groove (not shown) for inserting the limiting rod, and when the limiting ring 24 moves downward, the limiting rod is driven to be inserted into the accommodating groove, and the sliding block 8 is driven to be completely hidden in the mounting groove 9; meanwhile, the lower end of the limiting ring 24 is completely attached and abutted with the upper end of the supporting ring 47.

In this embodiment, one end of the upper end of the sliding block 8 in the water inlet pipe 45 is set to be a guide inclined plane towards one side of the inside of the casing 41, and when the upper end of the limiting rod is abutted against the upper end of the sliding groove 15, the upper end of the sliding block 8 is partially in the water inlet pipe 45 and the lowest point of the guide inclined plane is in the mounting groove 9. When mentioning the spacing ring 24 up, slider 8 displacement up under compression spring 13's effort, and then shifts up the in-process at spacing ring 24, and manual order about filter screen 7 slides to inlet tube 45 in, makes its filter screen 7 and slider 8's direction inclined plane transmission, orders about slider 8 displacement from top to bottom, pegs graft in the fixed slot 10 of filter screen 7, plays limiting displacement to filter screen 7.

The implementation principle of the embodiment is as follows: when the wastewater is filtered, the high-pressure pump 6 works to drive the wastewater in the water storage barrel 1 to pass through the quartz sand filter 2 and the activated carbon filter 3 in sequence through the pipelines for primary filtration, then pass through the filter bag 42 for filtration, finally enter the membrane shell filter 5 for filtration treatment, and directly discharge the wastewater after the wastewater reaches the standard; in this process, when filter bag 42 blockked up and need to change filter bag 42, open filter lid 43, propose spacing ring 24 up, order about filter screen 7 simultaneously and peg graft in inlet tube 45 at slider 8's grafting cooperation limit work, continue filtration treatment to waste water, install new filter screen 7 in casing 41 again, at spacing ring 24 displacement in-process down, order about the gag lever post and drive slider 8 displacement down, make its slider 8 relieve the limit work to filter screen 7, make its filter screen 7 under the impact of waste water, roll-off inlet tube 45, make the waste water of its inlet tube 45 directly filter through filter bag 42.

Example 2: referring to fig. 3 and 4, the difference from embodiment 1 is that a motor 16 is coaxially fixed on the filter cover 43, a sleeve 17 is coaxially fixed on an output shaft of the motor 16, a connecting groove is coaxially formed at the lower end of the sleeve 17, a lead screw 19 is inserted into the connecting groove, the lead screw 19 and the sleeve 17 are coaxially arranged, and a locking bolt 18 passes through the sleeve 17 and the lead screw 19 along the radial direction of the sleeve 17 and then is in threaded fit with a locking nut, so that the coaxial rotation work of the lead screw 19 and the motor 16 is realized; the filter cover 43 is further provided with a guide rod 20, wherein the screw rod 19 and the guide rod 20 are both arranged in parallel along the axial direction of the shell 41 and are respectively inserted into the filter bag 42; a cleaning roller 23 is matched on the screw rod 19 in a threaded manner, the cleaning roller 23 simultaneously penetrates through the guide rod 20, and the outer wall of the cleaning roller 23 is abutted against the inner wall of the filter bag 42; the motor 16 is communicated with an external power supply through an electric wire, when the motor is electrified, the motor 16 drives the screw rod 19 to rotate forwards and backwards, and drives the cleaning roller 23 to only move up and down under the guiding action of the guide rod 20 so as to clean the inner wall of the filter bag 42.

The lower end of the screw rod 19 is provided with a connecting plate 21, the other end of the connecting plate 21 extends to the lower part of the guide rod 20, two groups of fastening bolts 22 which are respectively coaxial with the screw rod 19 and the guide rod 20 penetrate through the connecting plate 21 to be respectively in threaded fit with the lower ends of the screw rod 19 and the guide rod 20, the connecting plate 21 is simultaneously limited on the screw rod 19 and the guide rod 20, and the screw rod 19 can be rotatably connected with the connecting plate 21.

The implementation principle of the embodiment is as follows: when the wastewater is filtered, the motor 16 is electrified to drive the screw rod 19 to rotate forwards and backwards, the cleaning roller 23 is driven to rotate automatically under the guiding action of the guide rod 20 on the cleaning roller 23, the cleaning roller 23 is driven to vertically move up and down under the thread matching action of the screw rod 19, the inner wall of the filter bag 42 is cleaned, the probability that the filter bag 42 is blocked by silt is reduced, and the service life of the filter bag 42 is effectively prolonged.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A wastewater treatment system comprises a water storage barrel (1) for storing wastewater, a primary filtering device communicated with the water storage barrel (1), a secondary filtering device (4) communicated with the primary filtering device and a membrane shell filter (5) communicated with the secondary filtering device (4), wherein high-pressure pumps (6) are respectively arranged between the water storage barrel (1) and the primary filtering device and between the secondary filtering device (4) and the membrane shell filter (5); secondary filter equipment (4) include upper end open-ended casing (41), open and close casing (41) open-ended strain lid (43), set up filter bag (42) in casing (41), the intercommunication has inlet tube (45) and outlet pipe (46) with membrane shell filter (5) intercommunication above with primary filter equipment intercommunication and be in filter bag (42) top on casing (41), its characterized in that: a circle of limiting ring (24) is fixed at the opening end of the filter bag (42), a circle of supporting ring (47) abutted against the lower end of the limiting ring (24) is fixed inside the shell (41), a filter screen (7) which moves along the axis of the water inlet pipe (45) is arranged at one end, located on the shell (41), of the water inlet pipe (45), a fixing groove (10) is formed in the lower side of the outer wall of the filter screen (7), a mounting groove (9) communicated with the fixing groove (10) is formed in the lower sides of the water inlet pipe (45) and the shell (41), a sliding block (8) inserted in the fixing groove (10) is connected in the mounting groove (9) in a sliding mode, and the sliding block (8) is driven to be partially inserted in the fixing groove (10) or completely hidden in the mounting groove (9) in the up-and down moving process of the limiting ring (24); a limiting rod is vertically fixed at the lower end of the sliding block (8), and one end of the limiting rod extends into the shell (41); the side wall of the shell (41) is correspondingly provided with a sliding groove (15) which is communicated with the mounting groove (9) and is used for the limiting rod to move up and down; the upper end of the support ring (47) is correspondingly provided with an accommodating groove for inserting the limiting rod, and when the limiting ring (24) moves downwards and the limiting rod is driven to be inserted into the accommodating groove, the sliding block (8) is driven to be completely hidden in the mounting groove (9); meanwhile, the lower end of the limiting ring (24) is completely attached and abutted to the upper end of the supporting ring (47).

2. A wastewater treatment system according to claim 1, characterized in that: filter screen (7) lateral wall is fixed with at least two sets ofly and inlet tube (45) axis parallel arrangement have stopper (11), stopper (11) cross-section sets up to the L type, inlet tube (45) inner wall corresponds stopper (11) and sets up spacing groove (12) that supply stopper (11) to peg graft and linear displacement along its axis.

3. A wastewater treatment system according to claim 1, characterized in that: be provided with between mounting groove (9) and slider (8) and order about compression spring (13) of slider (8) displacement up, slider (8) lower extreme vertical fixation has one to extend to the inboard gag lever post of casing (41), set up sliding tray (15) that supply the gag lever post displacement from top to bottom and communicate with mounting groove (9) on casing (41), the holding tank that supplies the gag lever post to peg graft is seted up in the correspondence on support ring (47).

4. A wastewater treatment system according to claim 3, characterized in that: the sliding block (8) extends to the inner part of the water inlet pipe (45) and is provided with a guide inclined surface towards one side in the shell (41).

5. A wastewater treatment system according to claim 1, characterized in that: the lower end of the filter cover (43) is fixedly provided with a plurality of fixing rods (14) with the lower ends abutted to the upper end of the limiting ring (24), and when the filter cover (43) closes the opening of the shell (41), the fixing rods (14) drive the limiting ring (24) to abut to the support ring (47).

6. A wastewater treatment system according to claim 1, characterized in that: the filter cover (43) is coaxially and rotatably connected with a screw rod (19), the screw rod (19) is connected with a cleaning roller (23) in a threaded manner, the cleaning roller (23) is annularly arranged, the outer wall of the cleaning roller is abutted against the inner side of a filter bag (42), the lower end of the filter cover (43) is further fixed with a guide rod (20) which is arranged in parallel with the screw rod (19), the guide rod (20) penetrates through the cleaning roller (23), and a motor (16) driving the screw rod (19) to rotate in the circumferential direction is arranged at the upper end of the filter cover (43).

7. The wastewater treatment system according to claim 6, wherein: the lower end of the screw rod (19) is provided with a connecting plate (21), two groups of fastening bolts (22) penetrate through the connecting plate (21), and the two fastening bolts (22) are respectively in threaded fit with the lower end axis of the screw rod (19) and the guide rod (20).

8. The wastewater treatment system according to claim 6, wherein: a sleeve (17) is fixed on an output shaft of the motor (16), a connecting groove for inserting the upper end of the screw rod (19) is formed in the lower end of the sleeve (17), and a locking bolt (18) penetrates through the sleeve (17), the screw rod (19) and a locking nut to be matched, so that the locking effect of the screw rod (19) and the sleeve (17) is achieved.