CN110563129A

CN110563129A - activated sludge biological sewage treatment device

Info

Publication number: CN110563129A
Application number: CN201910631706.0A
Authority: CN
Inventors: 席旭龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2019-12-13

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses an activated sludge biological sewage treatment device which comprises an aeration tank, wherein the aeration tank is used for carrying out aerobic treatment on sewage by using activated sludge, the aeration tank is communicated with a sedimentation tank through a water outlet mechanism, and a clean water tank is fixed on the right side of the sedimentation tank; a primary filtering mechanism is connected below a sewage port formed in the top end of the aeration tank; the sedimentation tank and the sludge tank are separated by an arc-shaped bottom plate, a stirring mechanism is arranged in the sludge tank, and a backflow mechanism is arranged between the sedimentation tank and the aeration tank. The invention is different from the existing sewage treatment device, the sludge is treated by an activated sludge biological method, the sewage is firstly filtered layer by a primary filtering mechanism, and the sludge precipitated after the activated sludge treatment enters an aeration tank by a backflow mechanism or enters a sludge tank by an arc-shaped bottom plate.

Description

Activated sludge biological sewage treatment device

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device by an activated sludge biological method.

background

Water resources are of great importance to people, however, with the increase of human activities and the development of industrial technologies, the water pollution condition is increased continuously, water resources available to human beings and natural environment face huge threats, and in order to prevent the increased damage to the environment and simultaneously recycle sewage, sewage treatment is a problem which people pay attention to at present.

The sewage treatment is generally divided into a physical method, a biological method and a chemical method, wherein the activated sludge method is an aerobic biological treatment method for sewage, can remove soluble and colloidal biochemical organic matters, suspended solids and other substances which can be adsorbed by the activated sludge from the sewage, and has good sewage purification effect, but the existing activated sludge method generally directly mixes the sewage with the activated sludge and then carries out precipitation, has limited purification effect, and does not consider how to treat the precipitated sludge.

Disclosure of Invention

The invention aims to provide an activated sludge biological sewage treatment device to solve the problems in the background technology.

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

an activated sludge biological method sewage treatment device comprises an aeration tank for carrying out aerobic treatment on sewage by using activated sludge, wherein the aeration tank is communicated with a sedimentation tank through a water outlet mechanism, and a clean water tank is fixed on the right side of the sedimentation tank;

A primary filtering mechanism is connected below a sewage port formed in the top end of the aeration tank;

The sedimentation tank and the sludge tank are separated by an arc-shaped bottom plate, a stirring mechanism is arranged in the sludge tank, and a backflow mechanism is arranged between the sedimentation tank and the aeration tank.

As a further scheme of the invention: the primary filtering mechanism comprises a filtering frame which is communicated up and down, an open slot is formed in the side wall, connected with the aeration tank, of the filtering frame, and a scraping plate is arranged on the outer side of the open slot;

three groups of sliding rails are arranged on the front side wall and the rear side wall of the filter frame, three groups of clamping blocks with the same height as the sliding rails are fixed on the inner wall of the filter frame far away from the aeration tank, and the sliding rails and the clamping blocks are connected with a filter plate assembly in a sliding manner.

As a further scheme of the invention: the filter plate assembly comprises three groups of filter plates, and the sizes of filter holes formed in the three groups of filter plates are reduced in sequence;

Sliding blocks corresponding to the sliding rails are fixed on two sides of the filter plate, and clamping grooves corresponding to the clamping blocks are formed in the bottom end of the filter plate;

the front end of filter is fixed with the push pedal, the cover is equipped with the sealing washer on the push pedal.

As a further scheme of the invention: the size of the push plate is matched with that of the opening groove.

As a further scheme of the invention: the top of aeration tank is equipped with the aeration machine, the gas outlet of aeration machine is equipped with the aeration pipe, the export of aeration pipe runs through the top of aeration tank extends to the inside of aeration tank.

as a further scheme of the invention: the water outlet mechanism comprises a water baffle, a second rotating shaft is fixed at the edge of the water baffle, and the water baffle is rotatably arranged on the surface of a mixed liquid outlet formed in the side wall of the aeration tank by the second rotating shaft;

The top of second pivot is fixed with the second gear, the second gear passes through the chain and is connected with first gear drive, be fixed with first pivot on the first gear, first pivot and the output drive of first motor are connected.

As a further scheme of the invention: the top of sedimentation tank is fixed with the water pump, the water inlet of water pump is equipped with the inlet tube, the inlet tube runs through the top of sedimentation tank extends to the inside of sedimentation tank, the delivery port of water pump is equipped with the outlet pipe, the outlet pipe runs through the top of clean water basin extends to the inside of clean water basin.

As a further scheme of the invention: the backflow mechanism comprises a backflow pipe connected with a backflow lifting device, a feed inlet of the backflow pipe penetrates through the arc-shaped bottom plate and extends to the bottom end inside the sedimentation tank, and a discharge outlet of the backflow pipe penetrates through the bottom end of the aeration tank and extends to the inside of the aeration tank.

as a further scheme of the invention: the bottom of arc bottom plate is equipped with the mud export, be equipped with the check valve on the mud export.

As a further scheme of the invention: a feeding hole is formed in the side wall of the sludge tank;

the stirring mechanism comprises a second motor fixed on the outer side of the sludge tank, the output end of the second motor is in driving connection with a third rotating shaft through a coupler, and a stirring paddle is fixed on the third rotating shaft.

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

1. The three groups of filter plates are arranged in the filter frame in sequence from large to small according to the sizes of the filter holes, sewage enters the primary filter mechanism through the sewage port, passes through the three groups of filter plates in sequence, impurity particles in the sewage are removed layer by utilizing the continuously reduced filter holes, the sewage after primary filtration flows into the aeration tank, and when the filter plates are drawn out, the impurity on the filter plates can be scraped to the outside by the scraping plate outside the open slot, so that the filter plates are convenient to clean;

2. By starting the aerator, fresh air is continuously conveyed to the interior of the aeration tank by utilizing the aeration pipe, so that oxygen required by growth of microorganisms and decomposition of organic matters is provided, the mixing effect of sewage and activated sludge can be improved, and the activated sludge and the sewage can be fully reacted and contacted;

3. The first motor is started, the first gear is driven to rotate through the first rotating shaft, the rotating first gear drives the second gear to rotate through the chain, so that the second rotating shaft is driven to rotate, the water baffle is driven to do eccentric circular motion in the rotating process of the second rotating shaft, so that the water baffle is rotated away from the surface of the mixed liquid outlet, and the mixed liquid enters the interior of the sedimentation tank for sedimentation;

4. After the sewage treatment is finished, detecting the concentration of the activated sludge in the aeration tank, starting the gas stripping reflux device, extracting the activated sludge from the bottom end of the sedimentation tank by the gas stripping reflux device, and refluxing the activated sludge into the aeration tank through a reflux pipe, so that the concentration of suspended solids and the concentration of microorganisms in the aeration tank are ensured, and the sewage treatment process can be continuously carried out;

4. Through opening the check valve on the sludge outlet, the sludge impoundment is directly discharged to the surplus sludge of bottom in the sedimentation tank, recycles the feed inlet and drops into the required medicament of processing surplus sludge to the inside of sludge impoundment, starts the second motor and drives the rotation of third pivot to utilize the stirring rake to carry out abundant mixed stirring to the surplus sludge and the medicament inside the sludge impoundment, handle the microorganism in the surplus sludge, prevent direct emission polluted environment.

Drawings

in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

FIG. 1 is a schematic structural view of an activated sludge biological sewage treatment apparatus.

FIG. 2 is a bottom view of a filter frame of the sewage treatment apparatus by activated sludge biological method.

FIG. 3 is a schematic view showing the internal structure of a filtration frame in the sewage treatment apparatus using activated sludge biological method.

FIG. 4 is a schematic structural diagram of a filter plate assembly in an activated sludge biological sewage treatment plant.

FIG. 5 is a schematic view of the structure of a water baffle in the sewage treatment plant by activated sludge biological process.

in the figure: 1-an aeration tank, 2-a sedimentation tank, 3-a clean water tank, 4-a sludge tank, 5-a sewage port, 6-a filter frame, 7-an open slot, 8-a scraper plate, 9-a slide rail, 10-a clamping block, 11-a filter plate, 12-a sliding block, 13-a clamping slot, 14-a filter hole, 15-a push plate, 16-a sealing ring, 17-an aerator, 18-an aeration pipe, 19-activated sludge, 20-a water baffle, 21-a second rotating shaft, 22-a second gear, 23-a chain, 24-a first gear, 25-a first rotating shaft, 26-a first motor, 27-an outlet, 28-a water pump, 29-a water inlet pipe, 30-a water outlet pipe, 31-an arc bottom plate and 32-a sludge outlet, 33-a return pipe, 34-a gas stripping reflux device, 35-a feed inlet, 36-a second motor, 37-a third rotating shaft and 38-a stirring paddle.

Detailed Description

in order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

Referring to fig. 1, in an embodiment of the present invention, an activated sludge biological sewage treatment apparatus includes an aeration tank 1 for performing aerobic treatment on sewage by using activated sludge 19, the aeration tank 1 is communicated with a sedimentation tank 2 through a water outlet mechanism, and a clean water tank 3 is fixed on the right side of the sedimentation tank 2; a primary filtering mechanism is connected below a sewage port 5 formed in the top end of the aeration tank 1; the sedimentation tank 2 and the sludge tank 4 are separated by an arc-shaped bottom plate 31, a stirring mechanism is arranged in the sludge tank 4, and a backflow mechanism is arranged between the sedimentation tank 2 and the aeration tank 1.

The sewage treatment device by the activated sludge biological method is different from the existing sewage treatment device, the sludge is treated by the activated sludge biological method, and simultaneously, the sludge precipitated after the activated sludge 19 is mixed with sewage is treated by different treatment processes, thereby being beneficial to the continuous operation of sewage treatment;

In getting into aeration tank 1 with sewage through sewage mouth 5, at first filter the mechanism through elementary filtration layer upon layer to sewage, carry out intensive mixing with activated sludge 19 in aeration tank 1 again, activated sludge 19 and the organic pollutant material intensive mixing contact in the sewage, and then the degradation is absorbed and is decomposed, thereby carry out purification treatment to sewage, mixed liquid deposits in flowing into sedimentation tank 2 through water outlet mechanism, the clear water of upper strata is carried to clear water tank 3 after the sediment, the mud of lower floor is selected to utilize in the backward flow mechanism gets into aeration tank 1 or utilizes arc bottom plate 31 to get into sludge impoundment 4, reuse rabbling mechanism handles the surplus mud in the sludge impoundment 4, prevent the microbial contamination environment in the surplus mud.

As shown in fig. 2 to 4, in this embodiment, the primary filtering mechanism includes a filtering frame 6 that is through from top to bottom, an open slot 7 is formed in a side wall of the filtering frame 6 connected to the aeration tank 1, and a scraper plate 8 is disposed outside the open slot 7; three sets of slide rails 9 are arranged on the front and rear side walls of the filter frame 6, three sets of fixture blocks 10 with the same height as the slide rails 9 are fixed on the inner wall of the filter frame 6 far away from the aeration tank 1, and the slide rails 9 and the fixture blocks 10 are connected with a filter plate assembly in a sliding manner.

Specifically, the filter plate assembly comprises three groups of filter plates 11, and the sizes of filter holes 14 formed in the three groups of filter plates 11 are sequentially reduced; the two sides of the filter plate 11 are fixed with sliding blocks 12 corresponding to the sliding rails 9, and the bottom end of the filter plate 11 is provided with clamping grooves 13 corresponding to the clamping blocks 10; the front end of the filter plate 11 is fixed with a push plate 15, and a sealing ring 16 is sleeved on the push plate 15.

Specifically, the size of the push plate 15 is matched with that of the opening groove 7.

After the three groups of filter plates 11 are sequentially arranged from large to small according to the sizes of the filter holes 14, the push plate 15 is held by hands, the filter plates 11 are sent into the open slot 7, the sliding blocks 12 on the side walls of the filter plates 11 are installed in the sliding rails 9 and slide inwards until the clamping grooves 13 at the bottom ends of the filter plates 11 are clamped with the clamping blocks 10, the installation of the filter plate assembly can be completed, and then the seal rings 16 are sleeved on the push plate 15 to ensure the sealing performance of the open slot 7;

During sewage passes through sewage mouth 5 entering primary filter mechanism, through three filter 11 of group in proper order, utilize the filtration pore 14 that constantly reduces to get rid of the foreign particle in the sewage layer upon layer, accomplish primary filterable sewage and flow into aeration tank 1's inside, handheld push pedal 15 can take filter 11 out again, when taking out, the flitch 8 of scraping in the open slot 7 outside can strike off the outside with the impurity on the filter 11, and the convenience is cleaned filter 11.

Further, an aerator 17 is arranged at the top end of the aeration tank 1, an aerator pipe 18 is arranged at an air outlet of the aerator 17, and an outlet of the aerator pipe 18 extends to the inside of the aeration tank 1 through the top end of the aeration tank 1.

The aerator 17 is started, the aerator 17 utilizes the aerator pipe 18 to continuously convey fresh air to the inside of the aeration tank 1, required oxygen is provided for growth of microorganisms and decomposition of organic matters, simultaneously, the mixing effect of sewage and activated sludge 19 can be improved, and the activated sludge 19 and the sewage can be fully reacted and contacted.

as shown in fig. 5, in this embodiment, the water outlet mechanism includes a water baffle 20, a second rotating shaft 21 is fixed at an edge of the water baffle 20, and the second rotating shaft 21 rotatably mounts the water baffle 20 on a surface of a mixed liquid outlet 27 formed on a side wall of the aeration tank 1; a second gear 22 is fixed at the top end of the second rotating shaft 21, the second gear 22 is in transmission connection with a first gear 24 through a chain 23, a first rotating shaft 25 is fixed on the first gear 24, and the first rotating shaft 25 is in driving connection with the output end of a first motor 26.

the mixed liquid that sewage and activated sludge 19 after fully mixing in aeration tank 1 passes through the inside that goes out water mechanism and mixed liquid export 27 entering sedimentation tank 2, start first motor 26, first motor 26 drives first gear 24 through first pivot 25 and rotates, pivoted first gear 24 passes through chain 23 and drives second gear 22 and rotate, thereby drive second pivot 21 and rotate, because the edge at breakwater 20 is fixed to second pivot 21, second pivot 21 is at the pivoted in-process, it is eccentric circular motion to drive breakwater 20, thereby change breakwater 20 from the surface of mixed liquid export 27, mixed liquid from this gets into the inside of sedimentation tank 2 and deposits.

further, the top of sedimentation tank 2 is fixed with water pump 28, the water inlet of water pump 28 is equipped with inlet tube 29, inlet tube 29 runs through the top of sedimentation tank 2 extends to the inside of sedimentation tank 2, the delivery port of water pump 28 is equipped with delivery port 30, delivery port 30 runs through the top of clean water basin 3 extends to the inside of clean water basin 3.

The mixed liquid is layered after standing and precipitating in the clean water tank 3, the treated sewage clear liquid is deposited at the bottom end of the clean water tank 3 through the precipitated sludge at the upper end, the water pump 28 is started, the clear liquid is pumped out from the upper end of the sedimentation tank 2 through the water inlet pipe 29, and then the clear liquid is discharged into the clean water tank 3 through the water outlet 30.

example 2

Referring to fig. 1, in another embodiment of the present invention, the reflux mechanism includes a reflux pipe 33 connected to an air stripping reflux unit 34, a feeding port of the reflux pipe 33 penetrates through the arc-shaped bottom plate 31 and extends to a bottom end of the interior of the sedimentation tank 2, and a discharging port of the reflux pipe 33 penetrates through a bottom end of the aeration tank 1 and extends to the interior of the aeration tank 1.

After sewage treatment is completed, the concentration of the activated sludge 19 in the aeration tank 1 is detected, in order to ensure the concentration of the activated sludge 19 and ensure that the sewage treatment process can be continuously carried out, the gas stripping return device 34 is started, the gas stripping return device 34 extracts the activated sludge from the bottom end of the sedimentation tank 2 and returns the activated sludge to the interior of the aeration tank 1 through the return pipe 33, and the concentration of suspended solids and the concentration of microorganisms in the aeration tank 1 are ensured.

Example 3

Referring to fig. 1, in another embodiment of the present invention, a sludge outlet 32 is disposed at a bottom end of the arc bottom plate 31, and a check valve is disposed on the sludge outlet 32.

Further, a feeding hole 35 is formed in the side wall of the sludge tank 4; the stirring mechanism comprises a second motor 36 fixed on the outer side of the sludge tank 4, the output end of the second motor 36 is in driving connection with a third rotating shaft 37 through a coupler, and a stirring paddle 38 is fixed on the third rotating shaft 37.

when 19 concentrations of activated sludge in the aeration tank 1 are enough, open the check valve on the sludge outlet 32, the sludge impoundment 4 is directly discharged to the excess sludge of bottom in the sedimentation tank 2, recycle the required medicament of feed inlet 35 to the inside input processing excess sludge of sludge impoundment 4, start second motor 36, second motor 36 drives the rotation of third pivot 37, thereby utilize stirring rake 38 to carry out abundant mixing stirring to the excess sludge and the medicament of sludge impoundment 4 inside, the microorganism to in the excess sludge is handled, prevent direct discharge polluted environment.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The activated sludge biological sewage treatment device is characterized by comprising an aeration tank (1) for carrying out aerobic treatment on sewage by using activated sludge (19), wherein the aeration tank (1) is communicated with a sedimentation tank (2) through a water outlet mechanism, and a clean water tank (3) is fixed on the right side of the sedimentation tank (2);

A primary filtering mechanism is connected below a sewage port (5) formed in the top end of the aeration tank (1);

the sedimentation tank (2) and the sludge tank (4) are separated by an arc-shaped bottom plate (31), a stirring mechanism is arranged in the sludge tank (4), and a backflow mechanism is arranged between the sedimentation tank (2) and the aeration tank (1).

2. The activated sludge biological sewage treatment plant according to claim 1, wherein the primary filtering mechanism comprises a filtering frame (6) which is through from top to bottom, an open slot (7) is formed in the side wall of the filtering frame (6) connected with the aeration tank (1), and a scraping plate (8) is arranged outside the open slot (7);

three groups of sliding rails (9) are arranged on the front and rear side walls of the filter frame (6), three groups of clamping blocks (10) with the same height as the sliding rails (9) are fixed on the inner wall of the filter frame (6) far away from the aeration tank (1), and the sliding rails (9) and the clamping blocks (10) are connected with a filter plate assembly in a sliding manner.

3. The activated sludge biological sewage treatment plant according to claim 2, wherein the filter plate assembly comprises three groups of filter plates (11), and the size of the filter holes (14) formed on the three groups of filter plates (11) is reduced in sequence;

sliding blocks (12) corresponding to the sliding rails (9) are fixed on two sides of the filter plate (11), and clamping grooves (13) corresponding to the clamping blocks (10) are formed in the bottom end of the filter plate (11);

The front end of the filter plate (11) is fixed with a push plate (15), and a sealing ring (16) is sleeved on the push plate (15).

4. The activated sludge biological wastewater treatment plant according to claim 3, wherein the size of the push plate (15) is identical to that of the open groove (7).

5. The sewage treatment device by the activated sludge biological method according to claim 1, wherein an aerator (17) is arranged at the top end of the aeration tank (1), an aeration pipe (18) is arranged at an air outlet of the aerator (17), and an outlet of the aeration pipe (18) extends to the interior of the aeration tank (1) through the top end of the aeration tank (1).

6. The sewage treatment device by the activated sludge biological method according to claim 1, wherein the water outlet mechanism comprises a water baffle (20), a second rotating shaft (21) is fixed at the edge of the water baffle (20), and the second rotating shaft (21) rotatably mounts the water baffle (20) on the surface of a mixed liquid outlet (27) formed on the side wall of the aeration tank (1);

The top of second pivot (21) is fixed with second gear (22), second gear (22) are connected with first gear (24) transmission through chain (23), be fixed with first pivot (25) on first gear (24), first pivot (25) are connected with the output drive of first motor (26).

7. The activated sludge biological sewage treatment plant according to claim 6, wherein a water pump (28) is fixed at the top end of the sedimentation tank (2), a water inlet pipe (29) is arranged at a water inlet of the water pump (28), the water inlet pipe (29) extends to the inside of the sedimentation tank (2) through the top end of the sedimentation tank (2), a water outlet pipe (30) is arranged at a water outlet of the water pump (28), and the water outlet pipe (30) extends to the inside of the clean water tank (3) through the top end of the clean water tank (3).

8. The activated sludge biological sewage treatment device according to any one of claims 1 to 7, wherein the return mechanism comprises a return pipe (33) connected with an air stripping return device (34), a feed inlet of the return pipe (33) penetrates through the arc-shaped bottom plate (31) and extends to the bottom end inside the sedimentation tank (2), and a discharge outlet of the return pipe (33) penetrates through the bottom end of the aeration tank (1) and extends to the inside of the aeration tank (1).

9. The activated sludge biological sewage treatment plant according to claim 8, wherein the bottom end of the arc-shaped bottom plate (31) is provided with a sludge outlet (32), and the sludge outlet (32) is provided with a one-way valve.

10. The activated sludge biological sewage treatment plant according to claim 9, wherein a feed inlet (35) is provided on the side wall of the sludge tank (4);

The stirring mechanism comprises a second motor (36) fixed on the outer side of the sludge tank (4), the output end of the second motor (36) is in driving connection with a third rotating shaft (37) through a coupler, and a stirring paddle (38) is fixed on the third rotating shaft (37).