CN214829779U - Sewage treatment equipment with backwashing device - Google Patents

Abstract

The utility model relates to a sewage treatment device with back flush unit, including installing the membrane filtering mechanism who is used for separating mud in the membrane cisterna, membrane filtering mechanism top is equipped with the backwash water tank, membrane filtering mechanism connects through filtration pipeline and flushing line respectively the backwash water tank, install the pump machine on the filtration pipeline for in sucking the water in the membrane filtering mechanism to the high-order water tank, the flushing line passes through membrane filtering mechanism with high low level drop between the backwash water tank is right membrane filtering mechanism erodees. The utility model discloses can reduce the required cost of cleaning equipment.

Description

Sewage treatment equipment with backwashing device

Technical Field

The utility model relates to a sewage treatment device, in particular to a sewage treatment device with a back washing device.

Background

At present, MAO is commonly used in a sewage treatment system as a conventional dephosphorization and denitrification process method; MBR, a membrane bioreactor, is a novel water treatment technology combining an activated sludge process and a membrane separation technology.

Chinese patent publication No. CN208829370U discloses a membrane bioreaction sewage treatment device, which comprises a DMBR integrated device and a backwashing water tank; an anoxic tank, an aerobic tank and a DMBR membrane tank are arranged in the DMBR integrated device, a sewage input pipeline is arranged at the upper part of the anoxic tank, the bottom of the anoxic tank is communicated with the bottom of the aerobic tank, and the upper part of the aerobic tank is communicated with the upper part of the DMBR membrane tank; a micropore aeration device is arranged in the aerobic tank, and a jet aeration device is arranged in the DMBR membrane tank; and the top of the DMBR membrane pool is provided with a water inlet and outlet pipeline, the water inlet and outlet pipeline is connected with a water production pump, and the water inlet and outlet pipeline is provided with a water production electric valve. The bottom of the backwashing water tank is provided with a circulating pipeline which is connected with a backwashing pipeline, and a backwashing pump is arranged on the circulating pipeline. When handling sewage, produce the water pump and start, sewage passes through business turn over water pipeline and gets into the DMBR membrane pond, handles sewage, and large granule mud is stayed in the DMBR membrane pond, but mud can the adhesion at the equipment surface in DMBR membrane pond, reduces separation efficiency. When the DMBR membrane tank is cleaned, the back flush pump injects water into the equipment of the DMBR membrane tank through the back flush pipeline and the circulating pipeline to realize back flush.

The prior art has the following problems that when sludge on the surface of the DMBR membrane pool equipment is cleaned, a back washing pump is required to be arranged for sucking water and back washing the equipment, so that the required cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem of higher cost in the prior art and provides a sewage treatment device with a backwashing device.

In order to solve the technical problem, the utility model discloses the purpose of the aforesaid utility model, the utility model provides a sewage treatment device with back flush unit, including installing the membrane filtering mechanism who is used for separating mud in the membrane cisterna, membrane filtering mechanism top is equipped with the back flush tank, membrane filtering mechanism is connected through filter tube and flushing line respectively the back flush tank, the last pump machine of installing of filter tube for with the water suction in the membrane filtering mechanism to the back flush tank in, the flushing line passes through membrane filtering mechanism with high low level drop between the back flush tank is right membrane filtering mechanism erodees.

In one implementation mode, the backwashing water tank comprises an outer tank body and an inner tank body, an overflow cavity is formed in the outer tank body, the inner tank body is wrapped in the overflow cavity, a water outlet cavity is formed in the inner tank body, a through hole is formed in the top of the inner tank body, the water outlet cavity is communicated with the overflow cavity through the through hole, the filtering pipeline is communicated with the outer tank body, and the flushing pipeline is communicated with the inner tank body.

In one embodiment, the filter duct communicates with the side wall of the outer box.

In one embodiment, the flushing pipe is communicated with the bottom of the water outlet cavity.

In one embodiment, valves are installed on both the filter line and the flushing line.

In one embodiment, a meter is mounted on the flush line.

In an implementation manner, the membrane filtering mechanism includes a support and a plurality of flexible pipes mounted on the support, a plurality of filtering holes are formed on the surface of each flexible pipe, and the filtering pipeline is communicated with all the flexible pipes.

In one embodiment, an oxygen supply assembly is connected to the bottom of the membrane filtration mechanism, and the oxygen supply assembly is communicated with all the flexible tubes and is used for supplying oxygen to the flexible tubes.

In an embodiment, the flushing pipe is arranged obliquely downwards from the end where it connects to the backwash water tank to the end where it connects to the membrane filtration means.

In one embodiment, the inner diameter of the flushing pipe is gradually reduced from the end connected with the backwashing water tank to the end connected with the membrane filtering mechanism, and the flushing pipe is arranged in a trumpet shape.

Compared with the prior art, the utility model relates to a sewage treatment device with back washing unit has following beneficial effect:

1. the sewage enters an anaerobic tank, an aerobic tank and a membrane tank in turn, organic matters in the sewage are decomposed and metabolized by anaerobic bacteria, so that the content of organic matters in the sewage is greatly reduced, the pump is connected with the membrane filtering mechanism to pump the filtered water into the backwashing water tank, meanwhile, the sludge in the sewage is left on the outer surface of the membrane filtering mechanism, the separation efficiency of the equipment is reduced, because the position of the back flushing water tank is higher than that of the membrane filtering mechanism, under the connection of the flushing pipeline, water in the back flushing water tank can flow into the membrane filtering mechanism through the dead weight, when the water overflows from the membrane filtering mechanism, the washing adhered on the surface of the membrane filtering mechanism is removed, the back washing is realized, compared with the prior art, the method for reversely flushing the membrane filtering mechanism by pumping water by the pump does not need external power drive, and has the effects of saving energy consumption and reducing cost;

2. the pump pumps water to the outer box body to enter the overflow cavity, then the water is gradually accumulated in the overflow cavity, when the height of the water in the overflow cavity reaches a certain value, the water overflows from the overflow cavity and enters the water outlet cavity through the through hole, and finally returns to the membrane separation mechanism, when the water is flushed outwards from the membrane separation mechanism, the sludge adhered to the surface of the membrane separation mechanism is flushed away, and the effect of cleaning the sludge can be synchronously realized while the pump works;

3. after the pump pumps the water into the overflow cavity, the water can be stored in the overflow cavity, the water in the overflow cavity stands for a period of time, the sediment in the water is left at the bottom of the overflow cavity, and partial sediment is screened out from the water overflowing from the top of the overflow cavity, so that the purity of the water is improved;

4. after the water overflows from the outer box body into the inner box body, the water is flushed into the flushing pipeline due to self weight, and when the flushing pipeline is connected with the bottom of the backwashing water tank, the loss of impact force is minimum;

5. the valve is arranged on the flushing pipeline, so that the time and flushing force of the membrane separation mechanism needing to be flushed can be controlled, and the water in the water outlet cavity is stored to a certain amount and then flushed, so that the flushing effect can be improved to a certain extent;

6. when the water producing pump sucks, pressure difference is formed between the inside and the outside of the flexible pipe, water in the membrane tank is pressed into the flexible pipe, solid components in sewage are left outside the filter holes, and the flexible pipe is connected with the oxygen supply assembly;

7. the water in the backwashing water tank flows into the membrane filtering mechanism by self-flowing, and the flushing pipeline is connected with one end of the backwashing water tank and connected with one end of the membrane filtering mechanism and inclines downwards, so that the potential energy of water flow can be fully utilized, and other energy consumption in the backwashing process is reduced;

8. because the internal diameter of the flushing pipeline is gradually reduced from one end of the flushing pipeline connected with the backwashing water tank to one end of the flushing pipeline connected with the membrane filtering mechanism, the water flow speed is gradually increased in the process that water flows from the backwashing water tank to the membrane filtering mechanism, and the flushing effect is better.

Therefore, the utility model has the characteristics of practice thrift energy consumption, reduce cost etc.

Drawings

FIG. 1 is a schematic view of the connection of an internal structure of the present invention;

FIG. 2 is a schematic structural view of a backwash water tank of the present invention;

fig. 3 is a schematic structural diagram of the membrane filtration mechanism of the present invention.

The reference numbers in the figures illustrate: 10. an anaerobic tank; 11. an aerobic tank; 12. a membrane tank; 20. a membrane filtration mechanism; 30. a backwash water tank; 301. an inner box body; 302. an outer case; 31. an overflow chamber; 32. a water outlet cavity; 33. a filtration pipeline; 34. flushing the pipeline; 35. a main conduit; 40. a pump machine; 41. a valve; 42. a meter; 50. a support; 51. a flexible tube; 52. a filtration pore; 53. an oxygen supply assembly; 54. an inflation tube; 55. a gas storage cavity.

Detailed Description

To make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

Example (b):

fig. 1 to 3 show an embodiment of a sewage treatment apparatus with a backwashing device according to the present invention. The specific embodiments are described in order according to the sequence of the drawings so as to achieve narrative purposes.

Referring to fig. 1, the sewage treatment equipment with a backwashing device comprises an anaerobic tank 10, an aerobic tank 11 and a membrane tank 12 which are sequentially arranged and communicated, wherein the anaerobic tank 10 is used for carrying out a nitrification reaction, and the aerobic tank 11 and the membrane tank 12 are used for carrying out a denitrification reaction. In order to separate sludge in sewage, a membrane filtering mechanism 20 is installed in the membrane tank 12, the membrane filtering mechanism 20 is connected with a backwashing water tank 30 through a filtering pipeline 33, a pump 40 is installed on the filtering pipeline 33, water in the membrane filtering mechanism 20 is pumped into the backwashing water tank 30 through the pump 40, sludge is left outside the membrane filtering mechanism 20 to realize filtering, and meanwhile, water in the backwashing water tank 30 automatically flows into the membrane filtering mechanism 20 through the flushing pipeline to perform backwashing on the water.

Specifically, referring to fig. 1 and 3, the membrane filtering mechanism 20 includes a support 50 and a flexible tube 51 installed on the support 50, the flexible tube 51 may be an mbr membrane, the flexible tube 51 is arranged at intervals and fixed on the support 50, a plurality of filtering holes 52 are formed in a side wall of the flexible tube 51, and a plurality of filtering holes 52 are uniformly distributed on a side wall of the flexible tube 51. The bottom of the membrane filtering mechanism 20 is connected with an oxygen supply assembly 53, the oxygen supply assembly 53 comprises a shell, an oxygen generator arranged in the shell, and an inflation tube 54 connected with the oxygen generator and used for outputting oxygen, and one end of the inflation tube 54 far away from the oxygen generator is fixedly connected to the bracket 50. The bracket 50 is provided with a closed air storage cavity 55, and the air inflation tube 54 and all the flexible tubes 51 are communicated with the air storage cavity 55.

Referring to fig. 2, the backwashing water tank 30 includes an inner tank 301 and an outer tank 302, the inner tank 301 is disposed in the outer tank 302, an overflow cavity 31 is formed between the outer tank 302 and the inner tank 301, a water outlet cavity 32 is formed in the inner tank 301, a through hole is formed at the top of the inner tank 301, the top of the inner tank 301 is communicated with the overflow cavity 31 through the through hole, and water in the water storage cavity 31 overflows into the water outlet cavity 32 after exceeding the top of the inner tank 301.

Referring to fig. 2 and 3, one end of the filtering conduit 33 is fixedly connected to the side wall of the outer box 302, the filtering conduit 33 is communicated with the overflow cavity 31, the other end of the filtering conduit 33 is connected with the main conduit 35, the main conduit 35 is horizontally arranged in a closed manner, and the upper ends of all the flexible pipes 51 are communicated with the main conduit 35. A valve 41 is mounted on the filter conduit 33 for controlling the flow of water from the membrane filtration unit 20 to the backwash water tank 30. One end of the flushing pipeline 34 is communicated with the bottom of the water outlet cavity 32, the other end of the flushing pipeline is communicated with the main pipeline 35, the backwashing water tank 30 is higher than the membrane filtering mechanism 20, and a high-low fall is formed between the backwashing water tank and the membrane filtering mechanism 20, so that the membrane filtering mechanism 20 is flushed through the flushing pipeline 34.

Referring to fig. 1, in order to reduce the energy loss when the water is discharged, the flush pipe 34 is inclined downward from the end connected to the backwash water tank 30 to the end connected to the membrane filter mechanism 20, and the inner diameter of the flush pipe 34 is gradually reduced from the end connected to the backwash water tank 30 to the end connected to the membrane filter mechanism 20 to form a trumpet shape, so that when the water flows from the backwash water tank 30 to the inside of the membrane filter mechanism 20, the water flow speed is gradually increased, and the flushing effect is better. For controlling and calculating the flushing flow, a valve 41 and a meter 42 are installed on the flushing pipe 34. The meter 42 may be a liquid turbine flow meter model LWGY-SIN.

The principle of this application is: when sewage is treated, the sewage is firstly pumped into the anaerobic tank 10 for nitration, nitrogen-containing substances (including organic nitrogen and inorganic nitrogen) are converted into nitrate, and then the nitrate enters the aerobic tank 11 to be reduced into gaseous nitrogen. The membrane tank 12 is communicated with the aerobic tank 11, and sludge in the sewage is precipitated and left at the bottoms of the aerobic tank 11 and the membrane tank 12.

After the sewage treatment is finished, the valve 41 on the filtering pipeline 33 is opened, the pump 40 is started, negative pressure is formed in the filtering pipeline 33, water outside the flexible pipe 51 is pressed into the flexible pipe 51, and sludge is left outside the filtering holes 52 and is sucked into the overflow cavity 31 through the filtering pipeline 33. When the overflow cavity 31 is full of water, the water overflows into the water outlet cavity 32 for temporary storage, the valve 41 on the flushing pipeline 34 is opened, and the water in the water outlet cavity 32 automatically flows into the main pipeline 35 and flows into each flexible pipe 51 from the main pipeline 35. Because the inner diameter of the flushing pipeline 34 is gradually reduced, the flow speed is gradually increased when water flow is guided out, and the flushing effect is better. Due to the pressure difference between the inside and the outside of the flexible pipe 51, water rushes out of the filtering holes 52, and the sludge adhered to the filtering holes 52 is rushed into the membrane tank 12, so that the probability of equipment blockage caused by sludge adhesion is reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a sewage treatment device with back flush unit, characterized in that, is used for separating the membrane filtration mechanism (20) of mud including installing in membrane cisterna (12), membrane filtration mechanism (20) top is equipped with back flush tank (30), membrane filtration mechanism (20) are connected through filter tube (33) and flushing pipe (34) respectively back flush tank (30), install pump (40) on filter tube (33) for water in membrane filtration mechanism (20) is sucked to back flush tank (30) in, flushing pipe (34) are passed through membrane filtration mechanism (20) with the high-low head drop between back flush tank (30) is to membrane filtration mechanism (20) erode.

2. The sewage treatment equipment with the backwashing device according to claim 1, wherein the backwashing water tank (30) comprises an outer tank body (302) and an inner tank body (301), an overflow cavity (31) is formed in the outer tank body (302), the inner tank body (301) is wrapped in the overflow cavity (31), a water outlet cavity (32) is formed in the inner tank body (301), a through hole is formed in the top of the inner tank body (301), the water outlet cavity (32) is communicated with the overflow cavity (31) through the through hole, the filtering pipeline (33) is communicated with the outer tank body (302), and the flushing pipeline (34) is communicated with the inner tank body (301).

3. The sewage treatment apparatus with a backwashing device according to claim 2, wherein the filter pipe (33) communicates with a side wall of the outer tank (302).

4. Sewage treatment plant with backwashing means according to claim 2, wherein the flushing pipe (34) communicates with the bottom of the outlet chamber (32).

5. Sewage treatment plant with backwashing means according to claim 3 or 4, wherein valves (41) are installed on both the filter pipe (33) and the flushing pipe (34).

6. Sewage treatment plant with backwashing means according to claim 5, wherein a meter (42) is mounted on the flush line (34).

7. The sewage treatment equipment with the back washing device according to claim 5, wherein the membrane filtering mechanism (20) comprises a bracket (50) and a plurality of flexible pipes (51) arranged on the bracket (50), a plurality of filtering holes (52) are formed on the surface of each flexible pipe (51), and the filtering pipeline (33) is communicated with all the flexible pipes (51).

8. The sewage treatment equipment with the back washing device according to claim 7, wherein an oxygen supply assembly (53) is connected to the bottom of the membrane filtration mechanism (20), and the oxygen supply assembly (53) is communicated with all the flexible pipes (51) and is used for supplying oxygen to the flexible pipes (51).

9. Sewage treatment plant with backwashing apparatus according to claim 7, wherein the flushing pipe (34) is arranged obliquely downwards from its end connected to the backwash water tank (30) to its end connected to the membrane filtration unit (20).

10. Sewage treatment plant with backwashing unit according to claim 9, wherein the inside diameter of the flush pipe (34) tapers from its end connected to the backwash water tank (30) to its end connected to the membrane filtration unit (20) in a trumpet-like arrangement.

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