CN217202434U

CN217202434U - Sewage pretreatment device

Info

Publication number: CN217202434U
Application number: CN202220365053.3U
Authority: CN
Inventors: 陈正军; 柯云; 余奕飞; 宗琪
Original assignee: Huazhong Agricultural University
Current assignee: Huazhong Agricultural University
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-08-16
Anticipated expiration: 2032-02-17

Abstract

The utility model provides a sewage pretreatment device, which comprises a water inlet grille, a grit chamber, an adjusting tank and a sludge filtering device, wherein the water inlet grille is positioned above the grit chamber, the water inlet grille is provided with a water inlet and an overflow port, the water inlet is higher than the overflow port, the water inlet grille is communicated with the grit chamber through the overflow port, the grit chamber is provided with a water outlet, the overflow port is higher than the water outlet, the grit chamber is communicated with the adjusting tank through the water outlet, and the sludge filtering device is arranged above the adjusting tank; wherein, the water inlet grille comprises a grille pool and a grille machine. The utility model discloses a loop through into water grid, grit chamber and equalizing basin with sewage, can get rid of impurity in the sewage to reach the purpose of sewage homogeneity and equal volume, and sludge filtering device can filter the solid matter in the detached active sludge, reduce the pipe network and block up the risk, reduce sewage treatment system's fault rate.

Description

Sewage pretreatment device

Technical Field

The utility model relates to a sewage treatment technical field particularly, relates to a sewage pretreatment device.

Background

Generally, sewage treatment is performed continuously, but since the quality and quantity of sewage vary and contain a large amount of impurities at different time intervals, the sewage needs to be pretreated, impurities in the sewage are removed, and the quality and quantity of the sewage are adjusted before entering a sewage treatment system. Among the prior art, can add the activated sludge that the sewage treatment later stage produced in pending sewage, carry out water quality control, because contain active material in the activated sludge, can play the effect of adjusting quality of water, nevertheless because contain a large amount of solid matter in the mud, also can lead to the increase of suspended solid in the sewage, cause the difficulty to subsequent processing, and increased the risk of pipe blockage and equipment trouble, lead to sewage treatment system to break down easily.

SUMMERY OF THE UTILITY MODEL

The utility model solves the problem of how to prevent the sewage treatment pipe network from being blocked and reduce the fault rate of the sewage treatment system.

In order to solve at least one aspect of the problems, the utility model provides a sewage pretreatment device, including water inlet grille, grit chamber, equalizing basin and sludge filtration device, the water inlet grille is located above the grit chamber, be provided with water inlet and overflow mouth on the water inlet grille, the water inlet is higher than the overflow mouth, the water inlet grille passes through the overflow mouth and communicates with the grit chamber, be provided with the delivery port on the grit chamber, the overflow mouth is higher than the delivery port, the grit chamber passes through the delivery port and communicates with the equalizing basin, sludge filtration device sets up in above the equalizing basin, sludge filtration device is suitable for dewatering the activated sludge who is used for adjusting water quality; the water inlet grille comprises a grille pool and a grille machine, wherein grille holes formed in the grille machine are suitable for blocking suspended or floating impurities in sewage.

Preferably, the sludge filtering device is a swinging filtering basket, the swinging filtering basket comprises a filtering basket and a first motor connected with the filtering basket, and the first motor is suitable for driving the filtering basket to swing.

Preferably, the first motor is connected with the filter basket through an eccentric wheel, and when the first motor works, the first motor is suitable for driving the filter basket to swing up and down.

Preferably, the grate machine is a rotary mechanical grate machine.

Preferably, still include filter residue transfer device, filter residue transfer device is located grid machine below, filter residue transfer device be suitable for with the filter residue that the grid produced of intaking is transported away.

Preferably, the adjusting tank further comprises a stirring device, and the stirring device is positioned at the bottom of the adjusting tank.

Preferably, the stirring device is a submersible stirrer.

Preferably, the adjusting tank further comprises an aeration device, and the aeration device is positioned at the bottom of the adjusting tank.

Preferably, the regulating tank further comprises a water distribution device, the water distribution device is connected with the water outlet, the water distribution device comprises a plurality of water distribution pipes, and water distribution holes which are uniformly distributed are formed in the water distribution pipes.

Preferably, a filler layer is arranged in the middle of the regulating tank, and active microorganisms are loaded on the filler layer.

The utility model has the advantages that: the utility model discloses a pass through into water grid, grit chamber and equalizing basin with sewage, the grid that intakes includes grid pond and grid machine, and be provided with evenly distributed's grid hole on the grid machine, sewage is when through the grid that intakes, the grid machine can block the impurity of big granule in the sewage from passing through, then in the grit chamber, impurity such as grit, inorganic granule that the proportion is great deposits to the bottom of grit chamber under the influence of gravity, avoid entering subsequent technology, lead to equipment wearing and tearing and pipeline jam, the equalizing basin can keep in the regulating pondage to the sewage that gets into, and mix sewage and activated sludge and adjust quality of water, guarantee that quality of water quantity is even; through set up sludge filtration apparatus above the equalizing basin, can filter the solid impurity who gets rid of among the activated sludge, only make the liquid among the activated sludge get into the equalizing basin, when guaranteeing that active material gets into the equalizing basin, also avoid too much solid matter to get into the equalizing basin, can not lead to the improvement of suspended solid content in the equalizing basin, reduce the risk that the pipe network blockked up, and reduce sewage treatment system's fault rate.

Drawings

Fig. 1 is a sectional view of a sewage pretreatment device in an embodiment of the present invention;

fig. 2 is a top view of a sewage pretreatment device in an embodiment of the present invention;

FIG. 3 is a top view of a swinging filter basket according to an embodiment of the present invention;

FIG. 4 is a left side view of a swinging filter basket in an embodiment of the present invention;

fig. 5 is a schematic structural view of a water distribution device in the embodiment of the present invention.

Description of reference numerals:

1-a water inlet grille; 11-a grid pond; 12-a grating machine; 2-a grit chamber; 3-a regulating reservoir; 31-rocking the filter basket; 311-a filter basket; 312 — a first motor; 313-eccentric wheel; 314-a pin; 32-a stirring device; 33-an aeration device; 34-a water distribution device; 341-water distribution pipe; 35-a filler layer; 4-a residue transfer device; 41-a hopper; 42-a packing auger; 43-a second motor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the coordinate system XYZ provided herein, the forward direction of the X axis represents the left direction, the reverse direction of the X axis represents the right direction, the forward direction of the Y axis represents the rear direction, the reverse direction of the Y axis represents the front direction, the forward direction of the Z axis represents the upper direction, and the reverse direction of the Z axis represents the lower direction. Also, it is noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

Before the biochemical treatment of sewage, it is necessary to remove floating and suspended impurities in the sewage and to adjust the quality and quantity of the sewage. In order to adjust the quality of sewage and reduce the loss of active substances in the biochemical treatment process, activated sludge generated in the biochemical treatment process is generally used for adjusting the quality of water. However, when the quality of the sewage is adjusted by the activated sludge, a large amount of solid suspended matters are brought, so that too many solid suspended matters in the sewage are easily caused, the sewage treatment effect is influenced, and the problem of pipeline blockage is caused.

As shown in fig. 1 and 2, an embodiment of the present invention provides a sewage pretreatment device, including a water inlet grille 1, a grit chamber 2, a regulating reservoir 3 and a sludge filtering device, wherein the water inlet grille 1 is located above the grit chamber 2, the water inlet grille 1 is provided with a water inlet and an overflow port, the water inlet is higher than the overflow port, the water inlet grille 1 is communicated with the grit chamber 2 through the overflow port, the grit chamber 2 is provided with a water outlet, the overflow port is higher than the water outlet, the grit chamber 2 is communicated with the regulating reservoir 3 through the water outlet, the sludge filtering device is arranged above the regulating reservoir 3, and the sludge filtering device is suitable for dewatering activated sludge for regulating water quality; the water inlet grille 1 comprises a grille pool 11 and a grille machine 12, and grille holes arranged on the grille machine 12 are suitable for blocking suspended or floating impurities in sewage.

Specifically, sewage to be treated sequentially flows through a water inlet grid 1, a grit chamber 2 and an adjusting tank 3, the water inlet grid 1 is positioned above the grit chamber 2, so that the occupied space of the sewage pretreatment device can be saved, the water inlet grid 1 comprises a grid chamber 11 and a grid machine 12, uniform grid holes are distributed on the grid machine 12, the aperture of each grid hole is 30mm, a water inlet and an overflow port are respectively arranged on two sides of the grid chamber 11, when the sewage passes through the water inlet 1, impurities floating or suspended in the sewage and having the particle size larger than 30mm are blocked on the grid machine 12 and then enter the grit chamber 2 through the overflow ports, in the grit chamber 2, the impurities such as inorganic particles and sand stones with higher specific gravity in the sewage are settled to the bottom of the grit chamber 2, so that the impurities in the sewage can be further reduced, the pipeline or sand stone abrasion pipelines and equipment are avoided from being blocked by the impurities, the sewage after the grit treatment in the grit chamber 2 enters the adjusting tank 3, the quality and quantity of the sewage are regulated. Wherein, 3 tops of equalizing basin set up sludge filtration apparatus, before the activated sludge who is used for adjusting quality of water gets into equalizing basin 3, at first handle through sludge filtration apparatus, the filtrating after the filtration gets into equalizing basin 3, the filter residue is collected and is handled after, contain a large amount of active microorganisms and other materials in the activated sludge, mix the back with the sewage in the equalizing basin 3, can adjust sewage quality of water, and carry out biochemical treatment in advance under active microorganisms's effect, the stability of sewage has been guaranteed, the subsequent processing pressure has been slowed down, the fault rate of sewage treatment system has been reduced. In addition, the adjusting tank 3 can temporarily store sewage, the amount of the sewage can be adjusted according to the amount of the sewage at different time intervals, the purpose of uniform amount is achieved, the sewage enters a subsequent treatment process at a constant speed, the hydraulic retention time of the sewage in the treatment process is ensured, and the stable treatment of the sewage is achieved.

Illustratively, as shown in fig. 2-4, the sludge filtering device is a swinging filter basket 31, the swinging filter basket 31 includes a filter basket 311 and a first motor 312 connected to the filter basket 311, and the first motor 312 is connected to the filter basket 311 via an eccentric 313, and the first motor 312 is adapted to swing the filter basket 311. The filter basket 311 is a hollow semi-cylinder and is provided with uniform filtering holes, the pin shaft 314 penetrates through the circle centers of the left and right bottom surface fan-shaped surfaces of the filter basket 311, and the filter basket 311 can rotate and swing by taking the pin shaft 314 as the circle center; the first motor 312 is connected with the filter basket 311 through an eccentric wheel 313, the eccentric wheel 313 is fixedly arranged on the left bottom surface of the filter basket, when the first motor 312 works, the first motor 312 drives the eccentric wheel 313 to rotate, and the filter basket 311 swings up and down under the action of the eccentric wheel 313. Through the swinging movement of the filter basket 311, sewage in the backflow mixed liquid is filtered out from the filtering holes of the filter basket 311, flows into the regulating reservoir 3 below, and the filter residue is kept in the filter basket 311 for periodic removal, the sewage in the backflow mixed liquid is regulated for the sewage quality in the regulating reservoir 3, and the filter residue is kept in the filter basket 311, so that excessive solid substances in the regulating reservoir 3 cannot be caused, the sewage quality is influenced, and the pipeline is blocked.

The grate 12 of the sewage pretreatment system is a rotary mechanical grate. Grid on grid machine 12 can carry out rotary motion under motor drive, and the large granule impurity that holds back on the grid simultaneously can be taken to the top along with the grid rotation to fall down, filter residue transfer device 4 sets up in grid machine 12 below, therefore impurity on the grid can fall into below filter residue transfer device 4 in, thereby will intake the filter residue that grid 1 produced and transport away. Exemplarily, the filter residue transfer device 4 includes a hopper 41, an auger 42 and a second motor 43, the hopper 41 is located below the grating machine 12, the filter residue can fall into the hopper 41, the second motor 43 is started, the auger 42 can be driven to rotate, and the impurities are conveyed to the outside for disposal. Prefiltering sediment transfer device 4 mutually supports through grid machine 12, can in time transport the filter residue on grid machine 12 outside sewage pretreatment systems, prevents that a large amount of overstocks of filter residue from influencing sewage filter effect, transports to the filter residue of outside and transports after dehydration.

As shown in fig. 1 and 2, the regulating reservoir 3 further includes a stirring device 32, and the stirring device 32 is located at the bottom of the regulating reservoir 3. Specifically, the stirring device 32 is a submersible stirrer, two stirring devices 32 are arranged in the regulating reservoir 3, and the two stirring devices 32 are respectively positioned at two opposite corners of the bottom of the regulating reservoir 3. When agitating unit 32 during operation, make the sewage in the equalizing basin 3 even with the mixed liquid of backward flow, adjust the quality of water of sewage, and agitating unit 32 stirs and can improve the dissolved oxygen volume in the equalizing basin 3, carries out the preliminary treatment to the sewage in the equalizing basin 3, and agitating unit 32 sets up in the 3 bottoms of equalizing basin, can not lead to the fact the interference to the top filler. Through setting up two agitating unit 32 respectively in wherein two diagonal angles departments of equalizing basin 3 bottom, can make the interior sewage of equalizing basin 3 mix the laminar convection current, improve and mix the degree of consistency.

Compared with the traditional vertical shaft type stirring device, the submersible type stirring machine is positioned at the bottom of the regulating tank 3, the interference to the upper space can not be caused, the energy consumption is low, and the sewage in different areas can generate mixed layer convection through the relative arrangement of the submersible type stirring machines, so that the mixing effect is better.

As shown in fig. 1, the adjusting tank 3 further comprises an aeration device 33, the aeration device 33 is located at the bottom of the adjusting tank 3, the aeration device 33 comprises a plurality of aeration pipes, and aeration discs are uniformly arranged on the aeration pipes. The mode that equalizing basin 3 adopted bottom aeration improves the dissolved oxygen volume in the sewage, and aeration equipment 33 sets up in equalizing basin 3 bottoms, and aeration equipment 33 includes a plurality of evenly distributed's aeration pipe, evenly is provided with the aeration dish on the aeration pipe, can improve the homogeneity of aeration, carries out biochemical pretreatment to sewage, can alleviate sewage post treatment pressure, improves the treatment effect.

As shown in fig. 1 and 5, the adjusting tank 3 further includes a water distribution device 34, the water distribution pipe 34 is connected to the water outlet of the grit chamber 2, the water distribution device 34 includes a plurality of water distribution pipes 341, and the water distribution pipes 341 are provided with water distribution holes which are uniformly distributed. The sewage treated by the grit chamber 2 is transferred into the regulating tank 3 through the water distribution device 34, and the sewage can be uniformly distributed in the regulating tank 3 by arranging the plurality of water distribution pipes 341 and can be uniformly mixed with the sewage which exists in the regulating tank 3 in the earlier stage, so that the uniformity of the sewage quality is improved.

As shown in figure 1, the middle part of the adjusting tank 3 is provided with a packing layer 35, the packing layer 35 comprises a biological packing, and the biological packing can carry out biochemical pretreatment on the sewage in the adjusting tank 3, so that the sewage treatment effect is improved.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims

1. The sewage pretreatment device is characterized by comprising a water inlet grating (1), a grit chamber (2), an adjusting tank (3) and a sludge filtering device, wherein the water inlet grating (1) is positioned above the grit chamber (2), a water inlet and an overflow port are formed in the water inlet grating (1), the water inlet is higher than the overflow port, the water inlet grating (1) is communicated with the grit chamber (2) through the overflow port, a water outlet is formed in the grit chamber (2), the overflow port is higher than the water outlet, the grit chamber (2) is communicated with the adjusting tank (3) through the water outlet, the sludge filtering device is arranged above the adjusting tank (3), and the sludge filtering device is suitable for dehydrating activated sludge for adjusting water quality;

the water inlet grille (1) comprises a grille pool (11) and a grille machine (12), wherein grille holes formed in the grille machine (12) are suitable for blocking suspended or floating impurities in sewage.

2. The sewage pretreatment device according to claim 1, wherein said sludge filtering device is a swinging filter basket (31), said swinging filter basket (31) comprising a filter basket (311) and a first motor (312) connected to said filter basket (311), said first motor (312) being adapted to swing said filter basket (311).

3. The sewage pretreatment device according to claim 2, wherein said first motor (312) is connected to said filter basket (311) through an eccentric (313), and when said first motor (312) is operated, said first motor (312) is adapted to swing said filter basket (311) up and down.

4. The sewage pretreatment device according to claim 1, wherein the grate machine (12) is a rotary mechanical grate machine.

5. Sewage pretreatment device according to claim 4, characterized by further comprising a filter residue transfer device (4), said filter residue transfer device (4) being located below said grid machine (12), said filter residue transfer device (4) being adapted to transfer out filter residues produced by said water inlet grid (1).

6. The sewage pretreatment device according to claim 1, characterized in that said conditioning tank (3) further comprises a stirring device (32), said stirring device (32) being located at the bottom of said conditioning tank (3).

7. The wastewater pretreatment device according to claim 6, wherein said agitation device (32) is a submersible agitator.

8. The sewage pretreatment device according to claim 1, wherein said conditioning tank (3) further comprises an aeration device (33), said aeration device (33) being located at the bottom of said conditioning tank (3).

9. The sewage pretreatment device according to claim 1, wherein the adjusting tank (3) further comprises a water distribution device (34), the water distribution device (34) is connected with the water outlet, the water distribution device (34) comprises a plurality of water distribution pipes (341), and the water distribution pipes (341) are provided with water distribution holes which are uniformly distributed.

10. The sewage pretreatment device according to claim 1, wherein a packing layer (35) is disposed in the middle of the adjusting tank (3), and the packing layer (35) is loaded with active microorganisms.