CN112279390A - Municipal sewage treatment process - Google Patents

Abstract

The invention discloses a municipal sewage treatment process, which comprises the following steps: carrying out residue crushing treatment on the introduced sewage to obtain sewage with crushed residues; primarily filtering the sewage with the broken residues, and separating the broken residues from the sewage to obtain primarily filtered sewage; and performing multi-stage fine filtration on the primarily filtered sewage to obtain sewage reaching the discharge standard. This municipal sewage treatment process degree of automation is high, has from the cleaning function, and the treatment effeciency is high, and the treatment effect is good, can carry out effective treatment to municipal sewage.

Description

Municipal sewage treatment process

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a municipal sewage treatment process.

Background

The prior art discloses a municipal sewage treatment device that application number is CN201910070548.6, including handling case, blow off pipe and delivery port, it is connected with outside sewage to handle one side top of case the blow off pipe, it has seted up to handle case opposite side bottom the delivery port, install adjusting valve on the delivery port, wherein, it has filter plate, coarse strainer and fine filter screen to handle incasement upper portion from the top down fixed mounting in proper order, it is equipped with the slope mesa to handle incasement bottom one side, it is equipped with the filter chamber to handle incasement bottom opposite side, wherein, from left to right install first filter screen, second filter screen and third filter screen in proper order in the filter chamber, it just is located to handle incasement upper portion smash the structure to install in the top of filter plate.

When utilizing above-mentioned public municipal sewage treatment device to carry out sewage treatment, inconvenient clear up broken residue, if clear up then need stop the processing to sewage, so can greatly reduced to sewage treatment's efficiency.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a municipal sewage treatment process.

In order to achieve the purpose, the invention adopts the following technical scheme:

according to the present invention there is provided a municipal sewage treatment process comprising:

carrying out residue crushing treatment on the introduced sewage to obtain sewage with crushed residues;

primarily filtering the sewage with the broken residues, and separating the broken residues from the sewage to obtain primarily filtered sewage;

and performing multi-stage fine filtration on the primarily filtered sewage to obtain sewage reaching the discharge standard.

Preferably, the step of subjecting the introduced sewage to a residue crushing treatment to obtain sewage with crushed residues comprises:

the introduced sewage flows to the residue crushing mechanism, the residue crushing mechanism comprises a U-shaped plate and a sliding plate matched with the U-shaped plate, one opposite surface of the sliding plate and the U-shaped plate is fixedly connected with a plurality of crushing blocks, and the U-shaped plate moves up and down relative to the sliding plate continuously, so that the residue in the sewage is crushed and leaks downwards to obtain the sewage with the crushed residue.

Preferably, the sliding plate is fixed on the inner wall of the treatment box, and the U-shaped plate is arranged in the treatment box in a vertically sliding manner.

Preferably, the preliminary filtering the sewage with the crushed residue to separate the crushed residue from the sewage, and the obtaining of the preliminary filtered sewage includes:

sewage with broken residue gets into and filters the storehouse assembly, and broken residue wherein filters to filtering on the filter screen of storehouse assembly, sewage leaks down to the realization is with broken residue and sewage separation, obtains prefiltering sewage.

Preferably, the filter screen is the disc structure, the filter screen rotates in the preliminary filtration in-process in succession, and the great residue of particle diameter is thrown outward to the periphery edge of disc filter screen in the broken residue under the centrifugal force effect.

Preferably, the filter screen continuously vibrates in the primary filtering process.

Preferably, the filter screen is made of a metal material.

Preferably, the multi-stage fine filtering of the preliminary filtered sewage comprises:

the sewage of preliminary filtration passes through multistage filter screen according to different filtration grades and arranges in proper order to the realization filters the layering of sewage step by step.

Preferably, the multistage filtration is followed by membrane filtration.

Compared with the prior art, the invention has the beneficial effects that:

this municipal sewage treatment process degree of automation is high, has from the cleaning function, and the treatment effeciency is high, and the treatment effect is good, can carry out effective treatment to municipal sewage.

Drawings

FIG. 1 shows a flow diagram of the steps of a municipal wastewater treatment process according to an embodiment of the invention.

FIG. 2 is a cross-sectional view of a municipal sewage treatment apparatus according to an embodiment of the invention.

Fig. 3 is an enlarged view of a portion a of fig. 2.

FIG. 4 is a side view of a municipal sewage treatment apparatus according to an embodiment of the invention.

FIG. 5 is a top view of a cross plate in a municipal sewage treatment apparatus according to an embodiment of the invention.

FIG. 6 is a top view of a matching structure of a U-shaped plate and a sliding plate in the municipal sewage treatment equipment according to an embodiment of the invention.

Figures 7-8 show schematic perspective views of a cleaning pan in a municipal sewage treatment apparatus according to an embodiment of the invention from different perspectives.

FIG. 9 shows a front view of a cleaning pan in a municipal sewage treatment apparatus according to an embodiment of the invention.

Fig. 10 is a sectional view a-a in fig. 9.

In the figure: 1 treatment box, 2 water inlet pipe, 3 box body, 4U-shaped plate, 5 sliding plate, 6 connecting plate, 7 fixing block, 8 vertical rod, 9 spring, 10 cross plate, 11 first arc wedge block, 12 second arc wedge block, 13 filter screen, 131 first grinding bulge, 14 filter bin, 141 annular groove, 142 limit groove, 15 horizontal pipe, 16 adjusting spring, 17 protective box, 18 rotating rod, limit bulge 181, 19 first bevel gear, 20 second bevel gear, 21 shaft rod, 22 driving motor, 23 filter box, 24 manual valve, 25 mounting block, 26 negative pressure fan, 27 air inlet pipe, 28 conveying pipe, 29 collecting box, 30 broken block, 31 water outlet pipe, 32 cleaning disc, 321 conical lower leakage cavity, 322 annular lower leakage part, 323 second grinding bulge, 324 rotating shaft hole, 325 limit lug, 33 adjusting arm, 34 supporting rod, 35 adjusting rope, 36 acting rod and 37 counterweight.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present application relates to a municipal sewage treatment process using a municipal sewage treatment apparatus for treatment, which will be described first.

Referring to fig. 2-10, a municipal sewage treatment device comprises a treatment box 1, a water inlet mechanism is installed at the upper end of the treatment box 1, a residue crushing mechanism is arranged below the water inlet mechanism in the treatment box 1 and comprises a U-shaped plate 4 and a sliding plate 5, the residue crushing mechanism is used for receiving sewage from the water inlet mechanism and crushing residues in the sewage, the U-shaped plate 4 is arranged in the treatment box 1, the sliding plate 5 matched with the U-shaped plate 4 is arranged on the inner wall of the treatment box 1, the U-shaped plate 4 can slide up and down relative to the sliding plate 5, a plurality of crushing blocks 30 are fixedly connected to one opposite side of the sliding plate 5 and the U-shaped plate 4, the sliding plate 5 is fixedly connected with the inner wall of the treatment box 1 through two connecting plates 6, and larger residues can be crushed through the crushing blocks 30.

The U-shaped plate 4 slides in the treatment box 1 through two limiting mechanisms, each limiting mechanism comprises two fixed blocks 7 fixedly connected with the inner wall of the treatment box 1, a vertical rod 8 is fixedly connected between the two fixed blocks 7, a sliding block is fixedly connected to the U-shaped plate 4, and the vertical rod 8 penetrates through the sliding block and is in sliding connection with the sliding block; equal fixedly connected with spring 9 between sliding block and two fixed blocks 7, two springs 9 all overlap on montant 8, and through the cooperation of fixed block 7 and montant 8, can be spacing to U template 4, make it only can reciprocate along montant 8.

The mechanism of intaking is including running through 1 upper end of processing case and rather than fixed connection's inlet tube 2, and the bottom fixedly connected with box 3 of inlet tube 2, and the bottom of box 3 is equipped with the opening, and the bottom opening of box 3 is just relative with broken piece 30, so can just be with sewage to carrying between U template 4 and the sliding plate 5, and U template 4 has certain guide ability for sewage can not the sinuous flow.

The inner wall of the treatment box 1 is fixedly connected with a protective box 17 which can protect a first bevel gear 19 and a second bevel gear 20 from being corroded by sewage; guard box 17 is equipped with rather than the dwang 18 of rotating connection with running through from top to bottom, be equipped with power unit between the outer wall of dwang 18 and processing case 1, power unit includes and handles case 1 outer wall fixed connection's driving motor 22, driving motor 22's output fixedly connected with axostylus axostyle 21, axostylus axostyle 21 runs through in proper order and handles case 1 and guard box 17, and with handling case 1 and guard box 17 rotatable coupling, the first bevel gear 19 of lower extreme fixedly connected with of dwang 18, the other end fixedly connected with second bevel gear 20 of axostylus axostyle 21, first bevel gear 19 and second bevel gear.

The treatment box 1 is also internally provided with a filter bin assembly, and the filter bin assembly is used for performing coarse filtration on sewage after residue crushing, and can also be understood as pre-filtration before fine filtration. The filter bin assembly comprises a filter bin 14 and a filter screen 13, the filter bin 14 is fixedly connected to the inner wall of the treatment box 1, the filter screen 13 is connected to the inner peripheral wall of the filter bin 14 in a vertically sliding manner, the filter screen 13 is arranged at the bottom of the filter bin, the filter screen is connected to a rotating rod 18 in a vertically sliding manner, the filter screen 13 and the rotating rod 18 are coaxially arranged, and the filter screen 13 can be driven by the rotating rod 18 to rotate; the bottom opening of filtration storehouse 14, the cover is equipped with adjusting spring 16 on the dwang 18, and adjusting spring 16's up end top meets in the bottom of filter screen 13, and the lower terminal surface top meets on the roof of protective housing 17, and adjusting spring 16 is used for balancing the weight of the filter residue that bears on the filter screen 13 on the one hand, and on the other hand is used for making the filter screen shake at the pivoted in-process moderate degree under the drive of dwang 18 to the lower hourglass of the sewage of being convenient for. The filter screen 13 can be specifically selected from a metal filter screen

Specifically, an annular groove 141 is formed in the lower portion of the inner peripheral wall of the filtering bin 14, the annular groove 141 extends along the circumferential direction of the filtering bin 14, the filtering net 13 is in a disc-shaped structure, an insertion portion is arranged on the outer edge of the filtering net 13, and the filtering net 13 is inserted into the annular groove 141 through the insertion portion; the axle center position department of filter screen 13 is equipped with the spliced eye that uses with dwang 18 cooperation, the spliced eye is used for passing of dwang 18, two spacing grooves have been seted up on the internal perisporium of spliced eye, two spacing grooves set up relatively, be located the same diameter of spliced eye promptly, the extending direction of two spacing grooves is parallel with the axis of filter screen, be equipped with two spacing protruding 181 on the periphery wall of dwang 18, two spacing protruding 181 set up relatively, and correspond the setting with two spacing grooves, the cooperation is used, dwang 18 is pegged graft in the spliced eye, wherein two spacing protruding 181 cards respectively go into two spacing inslots, thereby make filter screen 13 can slide from top to bottom along dwang 18 and rotate under the drive of dwang 18. Further, a plurality of first grinding protrusions 131 are uniformly distributed on the upper surface of the filter screen. Two limiting grooves 142 are formed in the upper end face of the inner peripheral wall of the filter bin 14, and the two limiting grooves 142 are arranged oppositely and extend along the direction parallel to the axis of the cleaning disc 32.

Furthermore, the sewage treatment equipment also comprises an automatic cleaning device which is used for cleaning the residue which is difficult to discharge outside in the filter bin assembly, the automatic cleaning device comprises a cleaning disc 32, an adjusting arm 33, a supporting rod 34 and an adjusting rope 35, the cleaning disc 32 can be arranged on the inner wall of the filter bin 14 in a vertically sliding manner, and the top of filter screen 13 is located to clearance dish 32, bracing piece 34 is vertical to be located on the inboard diapire of handling case 1, the rotatable bracing piece 34 of locating of regulating arm 33, the first end of regulating arm 33 and the first end of regulation rope 35 are connected, the second end of regulation rope 35 is connected on clearance dish 32, the second of regulating arm 33 is served and is equipped with action bars 36, action bars 36 is towards the top, specifically be the diapire setting towards filter screen 13, the lower extreme of action bars 36 is held with the second of regulating arm 33 and is connected, be equipped with the spheroid on the upper end, the spheroid is used for the diapire apical grafting with filter screen 13.

In this embodiment, the adjusting rope 35 is wound around the outer wall of the filter cartridge 14, and the second end of the adjusting rope is connected to the upper surface of the cleaning disc 32 at a position close to the axis of the filter cartridge.

Referring to fig. 7 to 10, the cleaning disc 32 is provided with a through rotating shaft hole 324 along the axial direction, and the rotating rod 18 passes through the rotating shaft hole 324, so that the rotating rod 18 can rotate relative to the cleaning disc 32; around having seted up annular lower hourglass portion 322 around pivot hole 324, annular lower hourglass portion 322 includes a plurality of lower orifices along circumference interval distribution, and lower orifices link up the thickness direction of cleaning disc 32, and the quantity of lower orifices is four, can certainly select as a plurality ofly according to specific need. A conical lower leakage cavity 321 is arranged on the first surface of the cleaning disc 32, wherein the large end of the conical lower leakage cavity 321 is arranged at the upper end and the lower end, the bottom of the conical lower leakage cavity 321 is communicated with the annular lower leakage part 322, the conical lower leakage cavity 321 is used for receiving municipal sewage after residue crushing treatment, and then the sewage is drained downwards to the filter screen 13 of the filter bin assembly through the cleaning disc 32; a plurality of second grinding protrusions 323 are arranged on the second surface, i.e. the downward surface, of the cleaning disc 32, and the second grinding protrusions 323 are used in cooperation with the first grinding protrusions 131 to grind the residue and sundries on the filter screen 13 which are difficult to clean and suck away. Two limiting lugs 325 which are oppositely arranged are arranged on the peripheral wall of the cleaning disc 32, the limiting lugs 325 are matched with the upper limiting grooves 142 of the filter bin 14 for use, and the cleaning disc 32 is clamped in the two limiting grooves 142 through the two limiting lugs 325, so that the cleaning disc 32 can only move up and down relative to the filter bin 14.

Further, a row of adjusting holes are formed in the adjusting arm 33 along the extending direction of the adjusting arm 33, and are used for adjusting the hinged position of the adjusting arm 33 and the supporting rod 34, so that the up-and-down moving range of the cleaning disc 32 can be adjusted, and the optimal residue grinding effect can be achieved.

In this embodiment, a portion of the hinge shaft of the adjustment arm 33 between the first end thereof and the hinge shaft of the adjustment arm 33 between the second end thereof is a first arm, a length of the first arm is greater than a length of the second arm, and the length of the first arm is 1.5 to 3 times the length of the second arm, so that, when the filter net 13 is used for a long time, because the residues with larger grain diameters and the like can not be discharged out of the treatment box 1 in time, the filter screen 13 sinks when more residues are accumulated on the filter screen 13, when the second arm is pressed down by the filter 13 by a small amount, the cleaning disc 32 can move down by a large amount relative to the filter 13, the cleaning disc 32 and the filter screen are close to each other, a grinding space is formed between the cleaning disc and the filter screen, and the filter screen 13 rotates to further grind the residues in the grinding space, so that the residues which are difficult to treat on the filter screen 13 can be effectively and timely discharged; on the contrary, when the residue accumulated on the filter screen 13 is discharged and reduced, the filter screen 13 is lifted in a small range, the cleaning disc 32 is lifted in a large range, and the space between the cleaning disc 32 and the filter screen 13 is enlarged so as to recover the normal filtering function, so that the structure arrangement realizes the effect of the micro-motion of the filter screen 13 forming the large-motion feedback of the cleaning disc 32, realizes the automatic cleaning of the filter bin 14 and prevents the excessive accumulation of the residue and the sundries on the filter screen 13.

Further, a counterweight is hung on the first arm of the adjusting arm 33, so that the ball of the action rod 36 always abuts against the bottom wall of the filter screen 13.

The upper end of dwang 18 and the bottom of U template 4 are equipped with reciprocating mechanism, reciprocating mechanism include with 18 upper end fixed connection's of dwang crosspiece 10, the upper end fixedly connected with of crosspiece 10 is a plurality of, for example, be four first arc wedge 11, specifically be equipped with a first arc wedge 11 on two respective ends of crosspiece respectively, the bottom fixedly connected with second arc wedge 12 of U template 4, first arc wedge 11 and second arc wedge 12 phase-match, and second arc wedge 12 is located first arc wedge 11 pivoted circumference. In this embodiment, the number of the second arc-shaped wedge blocks 12 is one, but is not limited to one, and a plurality of second arc-shaped wedge blocks may be provided as needed. The first arc-shaped wedge blocks 11 and the second arc-shaped wedge blocks 12 are used in cooperation, wherein arcs in the first arc-shaped wedge blocks 11 are arc-shaped extensions, specifically referring to fig. 3, the four first arc-shaped wedge blocks 11 are arc-shaped extensions respectively, the four first arc-shaped wedge blocks 11 are distributed on the same circumference, each first arc-shaped wedge block 11 can be regarded as an arc section as seen from top in fig. 3, the wedge shape means that two ends of the arc section are provided with a big end and a small end, and the big end and the small end are in smooth transition.

Two deslagging mechanisms which are arranged in the front and back are arranged between the filter bin 14 and the treatment box 1, each deslagging mechanism comprises a mounting block 25 fixed on the outer wall of the treatment box 1, a negative pressure fan 26 is mounted on each mounting block 25, an air inlet end of each negative pressure fan 26 is fixedly connected with an air inlet pipe 27, each air inlet pipe 27 penetrates through the treatment box 1 and is fixedly connected with the same, and the other end of each air inlet pipe 27 is fixedly connected with a transverse pipe 15; the first end of the transverse pipe 15 is connected with the air inlet pipe 27, the end head of the second end is inserted on the outer wall of the filtering bin 14, and the transverse pipe 15 penetrates through the outer wall of the filtering bin 14, so that the transverse pipe 15 is communicated with the filtering bin 14, and residues on the filter screen 13 can be sucked out and discharged through the transverse pipe 15; violently the pipe 15 front and back relative sets up two, under the normal use state of filter bin assembly, violently the pipe 15 is located between filter bin 14 and the filter screen 13, because the more filter bin of being difficult to outer row large-particle diameter residue that stores up on the filter screen 13 when can not normally use, the clearance dish of filter bin assembly is stopped up two violently pipes 15 when moving down for violently pipe 15 pauses to absorb the large granule residue on the filter screen 13, thereby prevents that the large granule residue from plugging up violently pipe 15. The outer wall of the treatment box 1 is fixedly connected with a collection box 29, and the air outlet end of the negative pressure fan 26 is communicated with the collection box 29 through a delivery pipe 28.

The bottom of the collecting tank 29 is provided with a drain pipe 31 fixedly connected with the collecting tank, the drain pipe 31 penetrates through the treatment tank 1 and is connected with the treatment tank 1 in a sealing way, and the drain pipe 31 is provided with a filter screen which can discharge the sewage in the collecting tank 29 into the treatment tank 1 again.

One side of handling case 1 is equipped with rose box 23, and rose box 23 is installed manual valve 24 with the one side that handles the case 1 mutually back of the body, installs filtering mechanism in rose box 23, and filtering mechanism comprises the processing filter screen of three differences, comes to carry out the meticulous filtration to municipal sewage.

When the invention is used, the water inlet pipe 2 is connected with a sewage conveying pipeline, when sewage is cleaned, the driving motor 22 is started, the driving motor 22 rotates to drive the shaft lever 21 to rotate, the second bevel gear 20 and the first bevel gear 19 rotate, the rotating lever 18 rotates to drive the filter screen cross plate 10 to rotate, the first arc-shaped wedge block 11 rotates, the first arc-shaped wedge block 11 intermittently abuts against and limits the second arc-shaped wedge block 12, when the first arc-shaped wedge block 11 abuts against the second arc-shaped wedge block 12, the U-shaped plate 4 moves upwards under the limitation of the first arc-shaped wedge block 11, namely the first arc-shaped wedge block 11 is gradually cut into the second arc-shaped wedge block 12 from the small end to the large end in the rotating process, so that the second arc-shaped wedge block 12 is gradually jacked to realize the upward movement of the U4, at this time, the spring 9 is deformed; when the first arc wedge-shaped block 11 is not abutted against the second arc wedge-shaped block 12, the U-shaped plate 4 falls and resets under the action of the spring 9, so that the U-shaped plate 4 can continuously move up and down, and larger residues are crushed through the crushing blocks 30 through the continuous up-and-down movement of the U-shaped plate 4 relative to the sliding plate 5.

When sewage passes between the U-shaped plate 4 and the sliding plate 5, the sewage flows into the filtering bin 14 and finally falls down through the filtering screen 13, wherein larger residues carried in the sewage are crushed under the action of the crushing blocks 30 which move relatively and finally fall into the filtering bin 14, so that the residues are crushed.

Two negative-pressure air blowers 26 are also started when the driving motor 22 is started, negative-pressure air blowers 26 can generate negative pressure at the bottom of the short pipe 16 when working, residues on the filter screen 13 can be sucked away through the negative pressure and conveyed into the collecting box 29 through the conveying pipe 28, so that the work of sewage treatment is not required to be stopped, the residues are cleaned, the efficiency of sewage treatment is improved, and meanwhile, the residues can be collected to facilitate treatment.

Municipal sewage filtered by the filter bin assembly enters the filter box 23 for further fine filtering and then is discharged.

Referring to FIG. 1, the municipal sewage treatment process of the present application includes the following steps, specifically referring to the following steps S01) to S03), and is comprehensively understood in conjunction with the above description about the municipal sewage treatment apparatus.

S01) carrying out residue crushing treatment on the introduced sewage to obtain sewage with crushed residues;

in the step, sewage flowing downwards from a box body 3 of the water inlet mechanism flows to the residue crushing mechanism, the residue crushing mechanism comprises a U-shaped plate 4 and a sliding plate 5 matched with the U-shaped plate 4, one opposite side of the sliding plate 5 and the U-shaped plate 4 is fixedly connected with a plurality of crushing blocks 30, and the U-shaped plate moves up and down relative to the sliding plate 5 continuously, so that the residue in the sewage is crushed and leaks downwards to obtain the sewage with the crushed residue.

In addition, because the bottom opening of box 3 is just relative with broken piece 30, so can just be just to carrying sewage to between U template 4 and the sliding plate 5, U template 4 has certain guide ability for sewage can not the sinuous flow.

For more detailed residue crushing treatment, reference is made to the above description of the specific structure of the municipal sewage treatment plant, and the detailed description thereof is omitted.

S02) carrying out primary filtration on the sewage with the broken residues, and separating the broken residues from the sewage to obtain the primary filtered sewage;

in this step, the sewage that has broken residue gets into and filters the storehouse assembly, and broken residue wherein filters to filter on the filter screen 13 of storehouse assembly, sewage leaks down, and broken residue is kept apart on filter screen 13 to the realization is with broken residue and sewage separation, obtains prefilter's sewage.

In the prefiltering process, filter screen 13 rotates in succession, under the centrifugal force effect, with the great residue of particle size in the broken residue get rid of outward to the periphery edge of disk filter screen 13, has realized the separation and distribution of big particle size residue and small particle size residue, has prevented that the residue from piling up in a department for sewage leaks the difficulty down. Because the setting of adjusting spring 16 for filter screen 13 is constantly quivered from top to bottom by a small margin, rotates process to violently managing 15 position department at filter screen 13, and when it quivered upwards to being close to violently the pipe opening part, violently manage 15 and inhale away outer row with the residue that is close to it on filter screen 13 under the negative pressure effect, and this kind of mode has avoided a large amount of residues to be inhaled violently the pipe simultaneously and has caused violently the pipe jam.

After the filter screen 13 is used for a long time, for example, residues with larger particle sizes cannot be discharged out of the processing box 1 in time, so that the filter screen 13 sinks when more residues are stored on the filter screen 13, when the second arm is pressed down by the filter screen 13 in a small amplitude, the cleaning disc 32 can move downwards relatively to the filter screen 13 by a larger amplitude, so that the cleaning disc 32 and the filter screen are close to each other, a grinding space is formed between the cleaning disc and the filter screen, the filter screen 13 rotates to further grind the residues in the grinding space, and the difficult-to-process residues on the filter screen 13 are discharged effectively and timely; on the contrary, when the residue accumulated on the filter screen 13 is discharged and reduced, the filter screen 13 is lifted in a small range, the cleaning disc 32 is lifted in a large range, and the space between the cleaning disc 32 and the filter screen 13 is enlarged so as to recover the normal filtering function, so that the structure arrangement realizes the effect of the micro-motion of the filter screen 13 forming the large-motion feedback of the cleaning disc 32, realizes the automatic cleaning of the filter bin 14 and prevents the excessive accumulation of the residue and the sundries on the filter screen 13.

Under the normal use state of filter bin assembly, violently pipe 15 is located between filter bin 14 and the filter screen 13, because the more filter bin of being difficult to arrange outside the large granule diameter residue that stores up on the filter screen 13 when can not normally use, the clearance dish of filter bin assembly moves down and blocks up two violently pipes 15 for violently pipe 15 pauses the large granule residue that absorbs on the filter screen 13, thereby prevents that large granule residue from plugging up violently pipe 15.

For more detailed preliminary filtration, reference is made to the above description of the specific structure of the municipal wastewater treatment plant, which is not further described herein.

S03) carrying out multi-stage fine filtration on the primarily filtered sewage to obtain the sewage reaching the discharge standard.

In this step, the preliminarily filtered sewage passes through multiple stages of filter screens arranged in sequence according to different filter grades, so that the sewage is layered and filtered step by step.

Furthermore, membrane filtration is arranged after the multi-stage filtration, so that the required sewage treatment components and effect can be more accurately obtained. The specific type of membrane may be selected as desired and will not be described further herein.

This municipal sewage treatment process degree of automation is high, has from the cleaning function, and the treatment effeciency is high, and the treatment effect is good, can carry out effective treatment to municipal sewage.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (9)

1. A municipal sewage treatment process, which is characterized by comprising the following steps:

carrying out residue crushing treatment on the introduced sewage to obtain sewage with crushed residues;

primarily filtering the sewage with the broken residues, and separating the broken residues from the sewage to obtain primarily filtered sewage;

and performing multi-stage fine filtration on the primarily filtered sewage to obtain sewage reaching the discharge standard.

2. The municipal sewage treatment process according to claim 1, wherein the step of subjecting the introduced sewage to a residue crushing treatment to obtain the sewage with crushed residues comprises:

the introduced sewage flows to the residue crushing mechanism, the residue crushing mechanism comprises a U-shaped plate (4) and a sliding plate (5) matched with the U-shaped plate (4), one opposite side of the sliding plate (5) and the U-shaped plate (4) is fixedly connected with a plurality of crushing blocks (30), and the U-shaped plate (4) moves up and down relative to the sliding plate (5) continuously, so that the residues in the sewage are crushed and leaked downwards to obtain the sewage with the crushed residues.

3. The municipal sewage treatment process according to claim 2, wherein the sliding plate (5) is fixed to the inner wall of the treatment tank (1), and the U-shaped plate (4) is slidably disposed up and down inside the treatment tank (1).

4. The municipal sewage treatment process of claim 1, wherein the step of subjecting the sewage with the crushed residue to preliminary filtration to separate the crushed residue from the sewage to obtain the preliminary filtered sewage comprises:

the sewage with broken residue gets into and filters the storehouse assembly, and broken residue wherein filters to filter on storehouse assembly's filter screen (13), sewage leaks down to the realization is with broken residue and sewage separation, obtains prefilter sewage.

5. The municipal sewage treatment process according to claim 4, wherein the filter screen (13) is of a disc-shaped structure, and the filter screen (13) continuously rotates in the primary filtration process, so that the crushed residues with larger particle sizes are thrown out to the peripheral edge of the disc-shaped filter screen (13) under the action of centrifugal force.

6. The municipal sewage treatment process according to claim 5, wherein the filter screen (13) is vibrated during the preliminary filtration.

7. The municipal sewage treatment process according to any one of claims 4 to 6, wherein the filter screen (13) is made of a metal material.

8. The municipal wastewater treatment process of claim 1, wherein the subjecting of the preliminary filtered wastewater to a plurality of fine filtration stages comprises:

the sewage of preliminary filtration passes through multistage filter screen according to different filtration grades and arranges in proper order to the realization filters the layering of sewage step by step.

9. The municipal sewage treatment process of claim 8, wherein the multistage filtration is followed by membrane filtration.

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