CN111186913A

CN111186913A - Sewage treatment equipment

Info

Publication number: CN111186913A
Application number: CN201910838956.1A
Authority: CN
Inventors: 浠绘尝; 任波
Original assignee: Shandong Zehui Environmental Protection Equipment Co Ltd
Current assignee: Shandong Zehui Environmental Protection Equipment Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-05-22

Abstract

The embodiment of the invention discloses a sewage treatment device, which comprises: an anoxic tank; a water inlet pipe for flowing sewage into the anoxic tank; an aerobic tank communicated with the anoxic tank; the SBR reaction tank is communicated with the aerobic tank and is provided with a water outlet pipe; one end of the decanter is arranged at the communication position between the aerobic tank and the SBR treatment tank, and the other end is arranged at the communication position between the SBR reaction tank and the water outlet pipe; one end of the sludge return pipe is arranged in the SBR reaction tank, and the other end of the sludge return pipe is arranged in the anoxic tank; the sludge return valve is arranged at the communication part of the sludge return pipe and the SBR reaction tank; and the oxygen supply device is used for supplying oxygen to the anoxic tank and the SBR reaction tank. The invention has the following advantages: the investment is saved; the control is flexible, and various processing requirements can be met; the activated sludge has good properties and low sludge yield; the denitrification effect is good.

Description

Sewage treatment equipment

Technical Field

The embodiment of the invention relates to the technical field of sewage treatment, in particular to sewage treatment equipment.

Background

Initially, the activated sludge process employed intermittent water feed at the beginning of production. The drainage mode is operated, but because the operation is complicated, automatic control equipment and technology are lacked at that time, the drainage mode is quickly replaced by a continuous activated sludge method and is almost eliminated and forgotten.

Later, the rapid development of hardware devices and software technologies for automatic monitoring and control, especially electronic computers, has brought new vitality to the application and development of the SBR (Sequencing Batch Reactor Activated Sludge Process).

At present, the process has the advantages of simple process flow, high treatment efficiency, flexible operation mode, difficult sludge expansion and the like, is a preferred process of small and medium-sized sewage treatment plants, and is widely applied all over the world.

In recent years, with the strictness of discharge standards of urban sewage treatment plants, higher requirements on discharge of nitrogen and phosphorus in effluent are put forward. How to improve the nitrogen and phosphorus removal efficiency of the SBR process and save energy and reduce consumption on the basis has important significance for the application and development of the process.

Disclosure of Invention

Therefore, the embodiment of the invention provides sewage treatment equipment to solve the problem of low nitrogen and phosphorus removal efficiency of the SBR process in the prior art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

the embodiment of the invention discloses a sewage treatment device, which comprises: an anoxic tank; the water inlet pipe is used for flowing sewage into the anoxic tank; the aerobic tank is communicated with the anoxic tank; the Sequencing Batch Reactor (SBR) reaction tank is communicated with the aerobic tank and is provided with a water outlet pipe; one end of the decanter is arranged at the communication position between the aerobic tank and the SBR treatment tank, and the other end of the decanter is arranged at the communication position between the SBR reaction tank and the water outlet pipe; a sludge return pipe, one end of which is arranged in the SBR reaction tank and the other end of which is arranged in the anoxic tank; the sludge return valve is arranged at the communication position of the sludge return pipe and the SBR reaction tank; the oxygen supply device is used for supplying oxygen to the aerobic tank and the SBR reaction tank; and the controller is used for controlling the oxygen supply condition of the oxygen supply device.

Further, the oxygen supply apparatus includes: the first fan is used for providing air for the aerobic tank through a first aeration pipe; the second fan is used for providing air for the SBR reaction tank through a second aeration pipe; the controller is respectively connected with the motor controller of the first fan and the motor controller of the second fan so as to control working parameters of the first fan and the second fan.

Further, still include: the water inlet pump is arranged on the water inlet pipe; and the water inlet floating ball is arranged in the water inlet pipe.

Furthermore, the controller is connected with the water inlet pump through a first automatic switch, a floating ball switch of the water inlet floating ball, a first contactor and a first relay so as to automatically control the water inlet pump; the controller is also connected with the water inlet pump through a first manual switch, the first contactor and the first relay so as to manually control the water inlet pump.

Further, the controller is connected with the first fan through a first time control switch, a second automatic switch, a second contactor and a second relay so as to automatically control the first fan; the controller is further connected with the first fan through a second manual switch, the second contactor and the second relay so as to manually control the first fan.

Further, the controller is connected with the second fan through a second time control switch, a third automatic switch, a third contactor and a third relay so as to automatically control the second fan; the controller is also connected with the second fan through a third manual switch, a third contactor and a third relay so as to manually control the second fan.

The invention has the following advantages:

investment is saved: the AO + SBR system adopts the structure of the aeration tank and the sedimentation tank, thereby saving a secondary sedimentation tank, integrating the main body in place and saving the total investment.

The control is flexible, and various processing requirements can be met: when the AO + SBR is operated, the operation time, the total retention time and the air supply quantity of each stage in a period can be adjusted according to the water quality of inlet water and the water outlet requirement.

The activated sludge has good properties and low sludge yield: the AO + SBR has high organic matter concentration in the initial stage of water inlet, and zoogloea bacteria in sludge flocs can obtain sufficient nutrition, so that the AO + SBR is favorable for the growth of the zoogloea bacteria, the sludge has a compact structure and good sedimentation performance, an idle period exists in the operation period of the AO + SBR, and the sludge is in an endogenous respiration stage, so that the sludge yield is lower.

The denitrification effect is good: the AO + SBR system can create proper aerobic, anoxic and denitrification conditions for nitrifying bacteria and denitrifying bacteria by adjusting proper aeration amount, and in addition, the denitrifying bacteria can also carry out endogenous denitrification in the idle period, so the denitrification effect is good. The removal rate of CODcr can reach 75-90%, and the removal rate of ammonia nitrogen can reach 70-85%.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.

FIG. 1 is a schematic view showing the construction of a sewage treatment apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic circuit diagram of a control circuit of a sewage treatment apparatus according to an embodiment of the present invention.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "inside" and "outside", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; 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.

FIG. 1 is a schematic view showing the construction of a sewage treatment apparatus according to an embodiment of the present invention. As shown in fig. 1, the sewage treatment apparatus according to the embodiment of the present invention includes: an anoxic tank 1, a water inlet pipe 2, an aerobic tank 3, an SBR reaction tank 4, a water outlet pipe 5, a decanter 6, a sludge return pipe 7, a sludge return valve 8, an oxygen supply device and a controller (not shown in the figure).

Wherein, the water outlet of the water inlet pipe 2 is aligned with the anoxic tank 1. The water inlet pipe 2 is used for providing sewage for the anoxic tank 1, and the sewage is subjected to nitrogen and phosphorus removal through the anoxic tank 1. In one embodiment of the present invention, the sewage treatment apparatus further comprises: a water inlet pump 13 arranged on the water inlet pipe 2 and a water inlet floating ball 14 arranged in the water inlet pipe 2. The water inlet pump 14 is used for providing sewage transmission power for the water inlet pipe 13, and the water inlet floating ball 14 is used for controlling the water level.

The aerobic tank 3 is communicated with the anoxic tank 1 and is used for removing organic matters in the sewage. The anoxic tank 1 and the aerobic tank 3 adopt an Anaerobic-aerobic process (AO).

The SBR reaction tank 4 is communicated with the aerobic tank 3, the water outlet pipe 5 is arranged on the aerobic tank 3, one end of the decanter 6 is arranged at the communication position between the aerobic tank 3 and the SBR treatment tank 4, and the other end of the decanter 6 is arranged at the communication position between the SBR reaction tank 4 and the water outlet pipe 5. The SBR reaction tank 4 is a biochemical tank and replaces a secondary sedimentation tank, and the three types of tanks respectively play their own roles and are organically combined to play the roles of aerobic nitrification, anoxic denitrification, pre-sedimentation and sedimentation. The water decanter 6 made of stainless steel plates or glass fiber reinforced plastics is used for draining, the drainage mode is also changed from intermittent drainage of water level rising and falling into continuous overflow with constant water level height (full tank operation), the effective volume of the SBR reaction tank 4 is fully utilized, and the water level is not higher or lower than that of the conventional SBR, so that the effective volume is wasted.

One end of the sludge return pipe 7 is arranged in the SBR reaction tank 4, and the other end is arranged in the anoxic tank 1 for sludge return. The sludge return valve 8 is arranged at the communication position of the sludge return pipe 7 and the SBR reaction tank 4.

The oxygen supply device is used for supplying oxygen to the anoxic tank 1 and the SBR reaction tank 4. In one embodiment of the present invention, the oxygen supply apparatus includes a first blower 9, a first aeration pipe 10, a second blower 11, and a second aeration pipe 12. Wherein, the first fan 9 is used for providing air to the aerobic tank 3 through the first aeration pipe 10 so as to carry out facultative hydrolysis and denitrification on the sewage in the aerobic tank 3. The second fan 11 is used for supplying air to the SBR reaction tank 4 through the second aeration pipe 12 for pre-settling and settling the sewage.

The controller is used for controlling the oxygen supply condition of the oxygen supply device.

FIG. 2 is a schematic circuit diagram of a control circuit of a sewage treatment apparatus according to an embodiment of the present invention. In one embodiment of the present invention, the controller is connected to the water inlet pump 13 through the first automatic switch SBR1, the float switch K2 of the water inlet float 14, the first contactor KM1 and the first relay FR1 to automatically control the water inlet pump. The controller is also connected to the water inlet pump 13 through a first manual switch, a first contactor KM1 and a first relay FR1 to manually control the water inlet pump 13. When the water inlet pump 13 works, the corresponding indicator light can be lightened.

In an embodiment of the present invention, the controller is connected to the first fan 9 through the first time switch KG1, the second automatic switch SBR2, the second contactor KM2 and the second relay FR2 to automatically control the first fan 9, so as to control the air supply amount of the first fan 9, and further control the oxygen supply amount of the first fan 9. The controller is also connected with the first fan 9 through a second manual switch, a second contactor KM2 and a second relay FR2 to manually control the first fan 9, so that the air supply amount of the first fan 9 can be controlled, and further the oxygen supply amount of the first fan 9 can be controlled.

In an embodiment of the present invention, the controller is connected to the second fan 11 through the second time switch KG2, the third automatic switch, the third contactor KM3 and the third relay FR3 to automatically control the second fan 11, so as to control the air supply amount of the second fan 11, and further control the oxygen supply amount of the second fan 11. The controller is further connected to the second fan 11 through a third manual switch, a third contactor KM3 and a third relay FR3 to manually control the second fan 11, so that the amount of air supplied to the second fan 11 can be controlled, and the amount of oxygen supplied to the second fan 11 can be controlled.

The model of the first time control switch KG1 and the second time control switch KG2 is preferably KG316T time control switches, and can be turned off at regular time according to actual conditions, for example, at night when the amount of sewage is small, the circuit can be turned off at regular time through the time control switches.

The sewage treatment equipment of the embodiment of the invention has the advantages that the investment is saved: the AO + SBR system adopts the structure of the aeration tank and the sedimentation tank, thereby saving a secondary sedimentation tank, integrating the main body in place and saving the total investment.

In addition, other structures and functions of the sewage treatment device of the embodiment of the present invention are known to those skilled in the art, and are not described in detail for reducing redundancy.

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. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. An apparatus for treating wastewater, comprising:

an anoxic tank;

the water inlet pipe is used for flowing sewage into the anoxic tank;

the aerobic tank is communicated with the anoxic tank;

the Sequencing Batch Reactor (SBR) reaction tank is communicated with the aerobic tank and is provided with a water outlet pipe;

one end of the decanter is arranged at the communication position between the aerobic tank and the SBR treatment tank, and the other end of the decanter is arranged at the communication position between the SBR reaction tank and the water outlet pipe;

a sludge return pipe, one end of which is arranged in the SBR reaction tank and the other end of which is arranged in the anoxic tank;

the sludge return valve is arranged at the communication position of the sludge return pipe and the SBR reaction tank;

the oxygen supply device is used for supplying oxygen to the aerobic tank and the SBR reaction tank;

and the controller is used for controlling the oxygen supply condition of the oxygen supply device.

2. The sewage treatment apparatus according to claim 1, wherein the oxygen supply device comprises:

the first fan is used for providing air for the aerobic tank through a first aeration pipe;

the second fan is used for providing air for the SBR reaction tank through a second aeration pipe;

the controller is respectively connected with the motor controller of the first fan and the motor controller of the second fan so as to control working parameters of the first fan and the second fan.

3. The sewage treatment apparatus of claim 1, further comprising:

the water inlet pump is arranged on the water inlet pipe;

and the water inlet floating ball is arranged in the water inlet pipe.

4. The sewage treatment apparatus of claim 3, wherein the controller is connected to the intake pump through a first automatic switch, a float switch of the intake float, a first contactor, and a first relay to automatically control the intake pump; the controller is also connected with the water inlet pump through a first manual switch, the first contactor and the first relay so as to manually control the water inlet pump.

5. The sewage treatment apparatus of claim 2, wherein the controller is connected to the first fan through a first time-controlled switch, a second automatic switch, a second contactor, and a second relay to automatically control the first fan; the controller is further connected with the first fan through a second manual switch, the second contactor and the second relay so as to manually control the first fan.

6. The sewage treatment apparatus of claim 2, wherein the controller is connected to the second fan through a second time-controlled switch, a third automatic switch, a third contactor, and a third relay to automatically control the second fan; the controller is also connected with the second fan through a third manual switch, a third contactor and a third relay so as to manually control the second fan.