Efficient denitrification reactor

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses an efficient denitrification reactor which comprises a reactor body, suspended particle filler for adsorbing strain sludge is arranged in the reactor body, a vertically through lifting barrel is arranged in the reactor body, and stirring blades are arranged in the lifting barrel. And the rotating stirring blades are used for forming a pressure difference inside and outside the lifting barrel. According to the high-efficiency denitrification reactor, wastewater is continuously introduced into the reactor body, the rotating stirring blades enable the flow rate of liquid in the lifting barrel to be increased, the pressure in the barrel to be reduced and form a pressure difference with the outside of the barrel, and the liquid at the bottom and strain sludge adsorbed on suspended particle filler are pressed into the lifting barrel; the lifting barrel is continuously filled with the wastewater and the strain sludge outside the lifting barrel, so that the wastewater and the strain sludge are mixed more uniformly, the concentration of the strain sludge in the wastewater per unit volume is increased, and the biological reaction efficiency between the strain sludge and the wastewater can be improved while the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a high-efficiency denitrification reactor. Background Art

[0002] Nitrogenous wastewater refers to wastewater containing high concentrations of nitrogen compounds, mainly including ammonia nitrogen, nitrates and nitrites. This type of wastewater usually comes from chemical plants, agricultural discharges, urban sewage and other sources. Nitrogenous wastewater contains high levels of nitrate nitrogen, which is an important cause of environmental pollution, especially water pollution.

[0003] The existing wastewater treatment method generally adopts the traditional A / O nitrification and denitrification process. The A / O nitrification and denitrification process is to put bacterial sludge and nitrogen-containing wastewater into the reaction tank, and the bacterial sludge reacts with the nitrate nitrogen in the wastewater to remove the nitrate nitrogen. However, this treatment method occupies a large area, and the concentration of bacterial sludge in the reaction tank is limited, which makes the biological reaction slow and inefficient. If the amount of sludge is increased, a large amount of bacterial sludge will be precipitated at the bottom of the tank. It is difficult to stir the precipitated bacterial sludge evenly in the reaction tank with a large area, which not only increases the cost but also still cannot solve the problem of low reaction efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a high-efficiency denitrification reactor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-efficiency denitrification reactor, comprising: a reactor body, wherein a suspended particle filler for adsorbing bacterial sludge is arranged in the reactor body, a lifting barrel which passes through from top to bottom is arranged in the reactor body, a stirring blade is arranged in the lifting barrel, and the stirring blade is rotated to form a pressure difference inside and outside the lifting barrel.

[0006] Preferably, a motor is fixedly mounted on the reactor body, and a rotating shaft is fixedly mounted on the output end of the motor.

[0007] Preferably, the rotating shaft is rotatably connected to the reactor body via a bearing.

[0008] Preferably, the rotating shaft extends into the lifting barrel, and the stirring blade is fixedly mounted on the rotating shaft.

[0009] Preferably, a solid-liquid separation device is provided above the lifting bucket.

[0010] Preferably, the solid-liquid separation device is fixedly installed in the reactor body.

[0011] Preferably, an overflow weir is arranged above the solid-liquid separation device.

[0012] Preferably, a water outlet cooperating with the overflow weir is opened on one side of the reactor body.

[0013] Preferably, the lifting barrel sleeve is provided with a water distribution pipe.

[0014] Preferably, the liquid inlet end of the water distribution pipe is fixedly installed on the reactor body.

[0015] The high-efficiency denitrification reactor has the following beneficial effects:

[0016] The high-efficiency denitrification reactor continuously passes wastewater into the reactor body, and the rotating stirring blades increase the flow rate of the liquid in the lifting barrel, reduce the pressure in the barrel, and form a pressure difference with the outside of the barrel. The liquid at the bottom and the bacterial sludge adsorbed on the suspended particle filler are pressed into the lifting barrel, and the wastewater and bacterial sludge outside the lifting barrel are continuously filled into the lifting barrel, so that the mixing of the wastewater and bacterial sludge is more uniform, thereby increasing the concentration of bacterial sludge in unit volume of wastewater, reducing costs while also improving the biological reaction efficiency between bacterial sludge and wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of a high-efficiency denitrification reactor provided in an embodiment of the present application;

[0018] Figure 2 A cross-sectional view of a high-efficiency denitrification reactor provided in an embodiment of the present application;

[0019] Figure 3 for Figure 2 Schematic diagram of the water pipe layout.

[0020] In the figure: 1. Motor; 2. Lifting bucket; 3. Stirring blades; 4. Suspended particle filler; 5. Solid-liquid separation device; 6. Overflow weir; 7. Water distribution pipe; 8. Water outlet. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides a high-efficiency denitrification reactor for sewage treatment, especially wastewater with high nitrogen content. In the present application, the wastewater takes landfill leachate as an example. After the initial sand settling and oil removal process, the landfill leachate needs to enter the biological treatment stage for nitrogen removal. At this time, the nitrogen content of the landfill leachate is above 2000 mg / L, which exceeds the treatment limit of the traditional A / O nitrification and denitrification process. Therefore, the high-efficiency denitrification reactor in the present application is used for treatment.

[0023] like Figure 1-Figure 2 As shown, the high-efficiency denitrification reactor comprises: a reactor body, in which a suspended particle filler 4 for adsorbing bacterial strain sludge is arranged.

[0024] Among them, Figure 2-Figure 3 As shown, a lifting barrel 2 is provided in the reactor body which passes through from top to bottom. The lifting barrel 2 is fixed inside the reactor body by installing fixing strips on both sides. A water distribution pipe 7 is provided on the lifting barrel 2. A plurality of nozzles are provided on the water distribution pipe 7. The liquid inlet end of the water distribution pipe 7 is fixedly installed on the reactor body and connected to an external wastewater supply system. Wastewater is continuously sprayed into the reactor body through the water distribution pipe 7.

[0025] Specifically, the reactor body is fixedly installed with a motor 1, and a rotating shaft is fixedly installed at the output end of the motor 1. The rotating shaft is rotatably connected to the reactor body through a bearing. The rotating shaft extends into the lifting barrel 2. A stirring blade 3 is arranged in the lifting barrel 2, and the stirring blade 3 is fixedly installed on the rotating shaft.

[0026] In this embodiment, the motor 1 drives the shaft to rotate, and the shaft drives the stirring blade 3 to rotate. During the rotation of the stirring blade 3, the liquid in the lifting barrel 2 continuously performs a swirling motion upward, and the flow rate increases. The pressure decreases as the flow rate increases, so that a pressure difference is formed inside and outside the lifting barrel 2. The liquid below the lifting barrel 2 and the bacterial sludge adsorbed on the suspended particle filler 4 are pressed into the lifting barrel 2, and the wastewater and bacterial sludge outside the lifting barrel 2 are continuously filled into the lifting barrel 2, so that the suspended particle filler 4 is in a fluidized state, the matrix transmission speed is increased, and the concentration of bacterial sludge in the unit volume of wastewater is increased. The wastewater and bacterial sludge in the reactor body are mixed more evenly, and the biological reaction efficiency between bacterial sludge and wastewater is improved, so that the wastewater treatment effect is increased from 0.2kgTN / m 3 (Traditional A / O nitrification and denitrification process) increased to 2-5kgTN / m 3 That is, for every kilogram of total nitrogen processed, the volume used will be reduced to 1 / 10-1 / 25 of the original, which greatly reduces the processing cost and improves the economic benefits.

[0027] like Figure 2As shown, a solid-liquid separation device 5 is arranged above the lifting bucket 2, and the solid-liquid separation device 5 is fixedly installed in the reactor body. Preferably, the solid-liquid separation device 5 adopts a filter screen, and the rotating shaft passes through the solid-liquid separation device 5. An overflow weir 6 is arranged above the solid-liquid separation device 5, and a water outlet 8 cooperating with the overflow weir 6 is arranged on one side of the reactor body. The overflow weir 6 serves as a structure for controlling the water level and water flow. By setting a weir top with a fixed height, when the water level exceeds the height of the weir top, the excess water will overflow from the weir top.

[0028] In the present application, as the water distribution pipe 7 continuously supplies water, the water level in the reactor body continues to rise, and the wastewater after the biological reaction quickly rises to the solid-liquid separation device 5 under the action of the stirring blade 3. The solid-liquid separation device 5 intercepts the suspended particle filler 4 with bacterial sludge attached. The treated wastewater is collected by the overflow weir 6 and discharged through the outlet 8.

[0029] Working principle: Motor 1 drives the shaft to rotate, and the shaft drives the stirring blade 3 to rotate. During the rotation of the stirring blade 3, wastewater is continuously sprayed into the reactor body through the water distribution pipe 7, and the liquid in the lifting barrel 2 continuously swirls upward, and the flow rate increases. As the flow rate increases, the pressure decreases, so that a pressure difference is formed between the inside and outside of the lifting barrel 2, and the liquid below the lifting barrel 2 and the bacterial sludge adsorbed on the suspended particle filler 4 are pressed into the lifting barrel 2. The wastewater and bacterial sludge outside the lifting barrel 2 are continuously filled into the lifting barrel 2. The wastewater after biological reaction rises rapidly to the solid-liquid separation device 5 under the action of the stirring blade 3. The solid-liquid separation device 5 intercepts the suspended particle filler 4 with bacterial sludge, and the treated wastewater is collected through the overflow weir 6 and discharged to the next treatment process through the outlet 8.

[0030] In summary, although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high efficiency denitrification reactor, characterized in that: include: A reactor body, wherein a suspended particle filler (4) for adsorbing bacterial strain sludge is arranged in the reactor body; A lifting barrel (2) penetrating from top to bottom is arranged in the reactor body, and a stirring blade (3) is arranged in the lifting barrel (2). The stirring blade (3) is rotated to form a pressure difference inside and outside the lifting barrel (2).

2. A high-efficiency denitrification reactor according to claim 1, characterized in that: The reactor body is fixedly mounted with a motor (1), and the output end of the motor (1) is fixedly mounted with a rotating shaft.

3. A high-efficiency denitrification reactor according to claim 2, characterized in that: The rotating shaft is rotatably connected to the reactor body via a bearing.

4. A high-efficiency denitrification reactor according to claim 3, characterized in that: The rotating shaft extends into the lifting barrel (2), and the stirring blade (3) is fixedly mounted on the rotating shaft.

5. The high-efficiency denitrification reactor according to claim 1, characterized in that: A solid-liquid separation device (5) is arranged above the lifting bucket (2).

6. A high-efficiency denitrification reactor according to claim 5, characterized in that: The solid-liquid separation device (5) is fixedly installed in the reactor body.

7. A high-efficiency denitrification reactor according to claim 6, characterized in that: An overflow weir (6) is arranged above the solid-liquid separation device (5).

8. A high-efficiency denitrification reactor according to claim 7, characterized in that: A water outlet (8) cooperating with the overflow weir (6) is provided on one side of the reactor body.

9. The high-efficiency denitrification reactor according to claim 1, characterized in that: The lifting bucket (2) is sleeved with a water distribution pipe (7).

10. A high-efficiency denitrification reactor according to claim 9, characterized in that: The liquid inlet end of the water distribution pipe (7) is fixedly mounted on the reactor body.

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