阅读说明：本技术 适用于污水处理的强化生物脱氮装置及方法 (Enhanced biological denitrification device and method suitable for sewage treatment ) 是由 曹效鑫 庞洪涛 侯锋 张婷 邵彦青 陈铭 卢先春 于 2021-08-24 设计创作，主要内容包括：本发明提供了一种适用于污水处理的强化生物脱氮装置及方法,强化生物脱氮装置包括控制系统以及混合动力系统,所述混合动力系统包括一个或多个搅动流化单元,所述搅动流化单元用于缺氧池内污泥的搅动；所述控制系统能够控制所述搅动流化单元以预设时间间歇运行进而能够使所述污泥在均匀混合状态和沉降状态之间进行切换,本发明突破现有技术中惯常做法,在不增加设备的前提下,仅仅通过间歇搅拌的方式在不损坏搅动流化单元的同时,既可以保证污泥不会完全沉入池底,又促进污泥释放内碳源,强化脱氮除磷过程,降低污水污染物浓度,减少搅拌能耗,整体上降低了污水处理成本,尤其适合于高标准下沉式污水处理厂。(The invention provides an enhanced biological denitrification device and method suitable for sewage treatment, wherein the enhanced biological denitrification device comprises a control system and a hybrid power system, the hybrid power system comprises one or more stirring fluidization units, and the stirring fluidization units are used for stirring sludge in an anoxic tank; the control system can control the stirring fluidization unit to intermittently operate for a preset time so as to switch the sludge between a uniform mixing state and a settling state.)

1. The enhanced biological denitrification device suitable for sewage treatment is characterized by comprising a control system (1) and a hybrid power system;

the hybrid power system comprises one or more stirring fluidization units (2), and the stirring fluidization units (2) are used for stirring the sludge in the anoxic tank;

the control system (1) can control the stirring fluidization unit (2) to operate intermittently for a preset time so as to switch the sludge between a uniform mixing state and a settling state.

2. An enhanced biological denitrification method suitable for sewage treatment is characterized by comprising the following steps:

s1, inputting the preset time for starting and stopping the stirring fluidization unit (2) into the control system (1);

and S2, the control system (1) controls the stirring fluidization unit (2) to operate in the anoxic pond intermittently at preset time.

3. The apparatus according to claim 1 or the method according to claim 2, wherein the agitated fluidization unit (2) comprises a support frame and an agitation device mounted on the support frame; the sludge in the anoxic tank can be agitated when the agitation equipment is operated.

4. The device according to claim 1 or the method according to claim 2, characterized in that the control system (1) comprises an input unit by means of which the preset times for starting and stopping the agitated fluidization unit (2) can be input separately.

5. The device or the method according to claim 4, wherein an operation interface is arranged on the input unit, and the operation interface can be used for inputting the preset starting and stopping time through manual adjustment.

6. The apparatus or method according to claim 5, wherein the predetermined time for starting and stopping is 10-60 minutes.

7. The apparatus or method according to claim 6, wherein the preset time for starting and stopping is 20-40 minutes.

8. The apparatus according to claim 1 or the method according to claim 2, characterized in that the time from the start to the stop and the time from the stop to the start of the agitation fluidisation unit (2) are each a respective preset time.

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a reinforced biological denitrification device and method suitable for sewage treatment.

Background

The excessive discharge of nitrogen-containing pollutants is the main reason for causing the eutrophication problem of water bodies, in recent years, the urban sewage treatment industry in China is rapidly developed, the sewage treatment capacity is rapidly increased, and increasingly strict discharge standards also have higher and higher requirements on the sewage treatment degree.

The biochemical pool is used as the most main treatment unit of a sewage treatment plant, and the principle of removing pollutants is as follows: c, N, P element in sewage is removed from water by biochemical metabolism of microorganisms in specific environments (anaerobic pond, anoxic pond, aerobic pond). At present, the operation cost of a sewage treatment plant is high, which mainly shows that the electricity cost is high, and the electricity consumption for aeration and stirring is one of the main reasons for high electricity consumption. In addition, because the carbon source in the raw sewage is limited, an external carbon source needs to be added in the existing method in the sewage denitrification process, the cost for purchasing the carbon source is increased, and the cost for sewage treatment is increased by electricity charge and carbon source purchase. In order to utilize the carbon source in the sludge, equipment is often added to achieve the purpose of utilizing the carbon source in the sludge, so that the equipment cost and the electricity utilization cost are still high.

Patent document CN211946463U discloses a novel sewage treatment denitrification device, which has the following technical scheme: the utility model provides a novel sewage treatment denitrogenation device, includes anaerobism pond, oxygen deficiency pond and aerobic tank, anaerobism pond, oxygen deficiency pond and aerobic tank communicate in proper order, aerobic tank passes through pipeline II and connects in two heavy ponds, two heavy ponds pass through pipeline V and connect in the anaerobism pond, aerobic tank still connects in endogenous denitrification pond through pipeline III, endogenous denitrification pond is connected with the storage mud pond. The return sludge of the system fully uses the self-carried carbon source in the internal source denitrification tank to carry out denitrification process, thereby achieving the purpose of removing the total nitrogen. However, the above design still needs an endogenous denitrification tank, which increases the occupied area, and in addition, the technology still needs larger stirring energy consumption, which cannot meet the requirements of the current sewage treatment plant on land saving and energy saving.

In view of the defects in the prior art, it is very important to reduce energy consumption such as stirring and enhance the denitrification effect of the system by effective control measures under the condition of ensuring the quality of the effluent water, which is of great significance to energy conservation and consumption reduction of sewage plants, especially to high-standard sinking type sewage treatment plants.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an enhanced biological denitrification device and method suitable for sewage treatment.

The invention provides an enhanced biological denitrification device suitable for sewage treatment, which comprises a control system and a hybrid power system, wherein the control system comprises a control system and a control system;

the hybrid power system comprises one or more stirring fluidization units, wherein the stirring fluidization units are used for stirring sludge in the sewage tank;

the control system can control the agitation fluidization unit to intermittently operate for a preset time so as to switch the sludge between a uniform mixing state and a settling state.

The invention provides an enhanced biological denitrification method suitable for sewage treatment, which comprises the following steps:

s1, inputting the preset time for starting and stopping the stirring fluidization unit into the control system;

and S2, the control system controls the stirring fluidization unit to intermittently operate in the sewage tank at preset time intervals.

Preferably, the agitation fluidization unit includes a support frame and an agitation device mounted on the support frame;

the sludge in the sewage tank can be stirred when the stirring device is operated.

Preferably, the control system includes an input unit through which preset times for starting and stopping the agitation fluidization unit can be input, respectively.

Preferably, an operation interface is arranged on the input unit, and the operation interface can input the preset starting and stopping time through manual adjustment.

Preferably, the preset time for starting and stopping is 10-60 minutes.

Preferably, the preset time for starting and stopping is 20-40 minutes.

Preferably, the time from starting to stopping and the time from stopping to starting of the stirring fluidization unit are respectively preset time

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

1. the invention breaks through the conventional method in the prior art, overcomes the bias existing in the prior art, can ensure that the sludge cannot be completely sunk into the bottom of the tank, promotes the sludge to release an internal carbon source, strengthens the nitrogen and phosphorus removal process, reduces the concentration of sewage pollutants, reduces the stirring energy consumption, integrally reduces the sewage treatment cost on the premise of not increasing equipment and only by an intermittent stirring mode without damaging a stirring fluidization unit, and is particularly suitable for a high-standard sunk sewage treatment plant.

2. The stirring fluidization units can be flexibly arranged according to the size and the depth of the anoxic tank, so that the optimal stirring effect is obtained, the structure is flexible, and the universality is good.

3. The method is simple and feasible, reduces the energy consumption of a sewage treatment plant, improves the pollutant removal efficiency, can save the stirring energy consumption by an intermittent stirring mode, improves the pollutant removal efficiency and reduces the sludge generation.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view showing the structure of an enhanced biological denitrification apparatus according to the present invention;

FIG. 2 is a schematic structural view of sludge in a homogeneously mixed state;

FIG. 3 is a schematic structural view of sludge in a settled state;

FIG. 4 is a schematic diagram of the steps of the agitated fluidization unit control.

The figures show that:

control system 1

Agitated fluidization unit 2

Anoxic tank 3

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1:

the invention provides an enhanced biological denitrification device suitable for sewage treatment, which comprises a control system 1 and a hybrid power system as shown in figures 1, 2 and 3, the hybrid power system comprises one or more stirring fluidization units 2, the stirring fluidization units 2 are used for stirring the sludge in the anoxic pond 3, the agitation fluidization unit 2 includes a support frame, and an agitation device installed on the support frame, when the stirring device runs, the sludge in the sewage tank can be stirred, the support frame is used for supporting and fixing the stirring device, the stirring device comprises a motor and a stirring structure, the motor is in driving connection with the stirring structure, the motor drives the stirring structure to move when the stirring structure operates, further, the sludge can not be completely sunk to the bottom of the tank for accumulation, and the sludge releases an internal carbon source after being stirred, so that the effects of nitrogen and phosphorus removal are enhanced.

In practical application, agitated vessel can realize the effect not hard up and stirring sludge, can adopt multiple structure, for example the stirring structure includes drive shaft and stirring rake, and the one end at the drive shaft is installed to the stirring rake, and the other end at the drive shaft is installed to the motor, and the motor can order about the drive shaft and rotate and then drive the stirring rake and rotate, and the stirring rake can set up multi-disc and multi-disc stirring rake to realize better stirring effect.

When the stirring equipment is designed, the structure of the motor above the water surface or the structure of the motor below the water surface can be adopted, and the stirring effect of the stirring equipment can be realized.

In actual setting, a certain inclination angle can be set between the stirring paddle and the axis to obtain a better stirring effect. Meanwhile, the motor with proper power is required to be matched during configuration, so that a better stirring effect is achieved, and the requirement of stirring load is met.

In the control system 1, the stirring fluidization unit 2 can be controlled by a control program to operate intermittently within the preset time of starting and stopping, so that the sludge can be switched between a uniform mixing state and a sedimentation state, when the stirring fluidization unit 2 is closed and stops operating, the sludge in the anoxic tank 3 gradually sediments, part of the sludge is effectively accumulated to increase the sludge concentration, and the competition among the sludge is large, so that the sludge utilizes an internal carbon source to carry out pollutant metabolism, the pollutant removal is facilitated, the sludge yield is reduced, and the control system has good application value. When the stirring fluidization unit 2 is started to operate, the sludge in the anoxic tank 3 is completely mixed, and when the sludge is uniformly mixed, the microorganisms utilize substances in the sewage to carry out pollutant metabolism.

The control system 1 comprises an input unit, the preset time of starting and stopping can be respectively input through the input unit, the preset time of starting and the preset time of stopping can be the same or different, and the preset time can be adjusted at any time according to the actual situation in the using process, so that a better effect can be obtained.

The intelligent terminal is connected with the control system 1, the intelligent terminal is wirelessly connected with the control system 1, remote control is facilitated, and the intelligent terminal can adopt a mobile phone, a tablet and the like.

The present invention also provides a method of agitation fluidization unit control, as shown in fig. 4, comprising the steps of:

and S1, inputting the preset time for starting and stopping the stirring fluidization unit (2) into the control system 1, wherein the preset time is generally set to be 10-60 minutes, and preferably 20-40 minutes.

S2, the control system 1 controls the stirring fluidization unit 2 to intermittently operate in the anoxic tank for a preset time, so that effective accumulation of sludge is realized, an internal carbon source is released, the nitrogen and phosphorus removal process is enhanced, and the concentration of pollutants in water is effectively reduced.

The time from the start to the stop and the time from the stop to the start of the agitation fluidization unit 2 in the present invention are each a preset time, and in the present embodiment, the time for which the agitation fluidization unit 2 is operated is 35 minutes, and the time for which the agitation fluidization unit is stopped is also set to 35 minutes.

Example 2:

this embodiment is a preferred embodiment of embodiment 1.

In this embodiment, the stirring structure includes drive shaft and stirring rake, and in this embodiment, the stirring rake adopts the stirring frame structure of reinforcing bar or steel sheet preparation, and the stirring frame structure is cylindrical or prismatic stirring frame, forms the stirring to mud during the rotation.

In this embodiment, an operation interface is arranged on the input unit, an operation button and a display screen are arranged on the operation interface, and the operation interface can input the preset time through manual adjustment. In different application scenarios, the operation interface can also adopt a touch screen display, and the input and adjustment of the preset time can be completed by manually touching the display buttons on the display.

In the embodiment, the preset time for starting and stopping the stirring and fluidizing unit 2 is set to be 30 minutes, under the operation of the strategy, the sludge in the anoxic tank 3 can be switched between a uniform mixing state and a sedimentation state, and when the sludge is uniformly mixed, microorganisms utilize substances in the sewage to carry out pollutant metabolism; during sedimentation, partial sludge is effectively accumulated to increase the concentration of the sludge, and the competition among the sludge is large, so that the sludge utilizes an internal carbon source to carry out pollutant metabolism, the pollutant removal is facilitated, and the yield of the sludge is reduced. By the strategy, the stirring energy consumption of the sewage plant can be saved by about 50 percent, and the TN concentration of the effluent is reduced by 2-5mg/L compared with the prior art.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application 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 application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.