A wastewater biofilm reactor based on a packing cylinder

Abstract

The present invention discloses a wastewater biofilm reactor based on a packing cylinder, which includes a packing cylinder, a diversion component and a diversion plate. The packing cylinder is honeycomb-shaped; the diversion component is arranged on the lower side of the packing cylinder; the diversion plate is fixed in the packing cylinder along the length direction of the packing cylinder; wherein, the diversion plate is a hollow frustum of a cone, and the upper bottom surface of the diversion plate faces the diversion component. The technical solution of the present invention forms an air-lift effect by introducing air into the packing cylinder through the diversion component arranged at the bottom of the packing cylinder, so that the sewage forms an upward flow state in the packing cylinder. Under the action of the diversion plate inside the packing cylinder, the sewage in the packing cylinder is discharged out of the packing cylinder through the surface of the packing cylinder at intervals, so that the sewage forms a cycle inside and outside the packing cylinder, increasing the contact between the sewage and the biofilm, improving the mass transfer efficiency, enhancing the utilization rate of dissolved oxygen and improving the sewage treatment effect. It is applicable to the existing process of efficiently treating urban domestic sewage and achieves the effect of ultra-low ammonia nitrogen emission.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a wastewater biofilm reactor based on a packing cylinder. Background Art

[0002] In recent years, in order to improve the water quality of the receiving water body and reduce the impact of the drainage of sewage treatment plants on the environment, some regions have begun to restrict the drainage water quality indicators of sewage treatment facilities by using the surface water level IV standard (except TN). Excess sludge is the main by-product in the sewage treatment process. The traditional activated sludge method is prone to problems such as sludge bulking and sludge floating. The biofilm method is a relatively green sewage treatment process, which can not only replace the activated sludge method, but also has the advantages of low sludge production and stable operation.

[0003] The packing cylinder is the core part of the sewage treatment by the biofilm method. The sewage treatment by the packing cylinder is mainly through the biofilm method. The biofilm method is a relatively green sewage treatment process, which can not only replace the activated sludge method, but also has the advantages of low sludge production and stable operation. So far, most of the relevant research has focused on the influence of activated sludge extracellular polymer (EPS) on the distribution of the properties of activated sludge itself and the adhesion behavior and fixation mechanism on the carrier surface, which has restricted the optimization and development of biofilm carriers in the field of sewage treatment to a certain extent. And limited by the material, structure and process, the currently used packing cylinders still have problems such as packing cylinder blockage and uneven aeration during operation.

[0004] In summary, how to solve the problems of easy packing blockage and uneven aeration of the traditional packing cylinder during operation is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] The main purpose of the embodiment of the present invention is to provide a wastewater biofilm reactor based on a packing cylinder, aiming to provide a wastewater biofilm reactor that can increase the utilization rate of dissolved oxygen, reduce the sludge production rate and improve the mass transfer efficiency.

[0006] The technical solution for the present invention to solve the above technical problems is to provide a wastewater biofilm reactor based on a packing cylinder, including a packing cylinder, a diversion component and a diversion plate. The packing cylinder is in a honeycomb shape; the diversion component is arranged on the lower side of the packing cylinder; the diversion plate is fixed in the packing cylinder along the length direction of the packing cylinder; wherein, the diversion plate is in a hollow frustum shape, and the upper bottom surface of the diversion plate faces the diversion component.

[0007] Further, the wastewater biofilm reactor based on a packing cylinder includes a plurality of the diversion plates, and the plurality of the diversion plates are sequentially arranged in the packing cylinder along the length direction of the packing cylinder.

[0008] Further, any two adjacent ones of the flow guiding plates are arranged at an interval of 0.3 m - 1 m.

[0009] Further, microorganisms adhere to the surface of the packing cylinder.

[0010] Further, the packing cylinder is made of polypropylene multifilament yarn and is formed after polypropylene air treatment and heating and compression deformation.

[0011] Further, the angle of the hypotenuse of the flow guiding plate is 60°.

[0012] Further, the flow guiding assembly is an aeration device, and the aeration head of the aeration device faces the bottom of the packing cylinder.

[0013] Further, the wastewater biofilm reactor based on the packing cylinder further includes a bracket, and the packing cylinder is fixed on the bracket.

[0014] According to the technical solution of the present invention, by arranging a flow guiding assembly at the bottom of the packing cylinder to introduce air into the packing cylinder to form an air-lift effect, the sewage forms an upward flow state in the packing cylinder, and under the action of the flow guiding plates inside the packing cylinder, the sewage in the packing cylinder is discharged out of the packing cylinder through the surface of the packing cylinder at regular intervals, so that the sewage forms a cycle inside and outside the packing cylinder, increasing the contact between the sewage and the biofilm, improving the mass transfer efficiency, enhancing the utilization rate of dissolved oxygen and improving the sewage treatment effect. It is applicable to the existing processes for efficient treatment of urban domestic sewage and achieves the effect of ultra-low ammonia nitrogen emission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of the wastewater biofilm reactor based on the packing cylinder according to the present invention;

[0017] Figure 2 It is a schematic diagram of the sewage flow of the wastewater biofilm reactor based on the packing cylinder according to the present invention.

[0018] Explanation of the reference numerals in the drawings:

[0019] Label Name Label Name 1 Packing cylinder 3 Flow deflector 2 Flow guiding assembly 4 Bracket DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the specification of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meanings of "several" and "multiple" are at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The present invention provides a wastewater biofilm reactor based on a packing cylinder, aiming to provide a wastewater biofilm reactor that can increase the utilization rate of dissolved oxygen, reduce the sludge production rate, and improve the mass transfer efficiency.

[0026] The following will illustrate the wastewater biofilm reactor based on a packing cylinder proposed by the present invention in specific embodiments:

[0027] In the technical solution of this embodiment, as Figure 1As shown in the figure, a wastewater biofilm reactor based on a packing cylinder includes a packing cylinder 1, a flow guiding component 2 and a flow guiding plate 3. The packing cylinder 1 is honeycomb-shaped; the flow guiding component 2 is arranged on the lower side of the packing cylinder 1; the flow guiding plate 3 is fixed in the packing cylinder 1 along the length direction of the packing cylinder 1; wherein, the flow guiding plate 3 is in the shape of a hollow frustum of a cone, and the upper bottom surface of the flow guiding plate 3 faces the flow guiding component 2.

[0028] It can be understood that by arranging the flow guiding component 2 at the bottom of the packing cylinder 1, air is introduced into the packing cylinder 1 to form an air-lift effect, so that the sewage forms a flow state from bottom to top in the packing cylinder 1, and under the action of the flow guiding plate 3 inside the packing cylinder 1, the sewage in the packing cylinder 1 is discharged out of the packing cylinder 1 through the surface of the packing cylinder 1 at regular intervals, so that the sewage forms a cycle inside and outside the packing cylinder 1, increasing the contact between the sewage and the biofilm, improving the mass transfer efficiency, enhancing the utilization rate of dissolved oxygen and improving the sewage treatment effect. It is applicable to the existing process of efficiently treating urban domestic sewage to achieve the effect of ultra-low ammonia nitrogen emission.

[0029] In a feasible way, the wastewater biofilm reactor based on the packing cylinder is placed in a reaction tank, as Figure 2 shown. The wastewater enters from the bottom of the reaction tank and is aerated into the packing cylinder 1 through the aeration device of the flow guiding component 2. The wastewater flows upward in the packing cylinder 1 along the length direction of the packing cylinder 1 (i.e., the arrangement direction of the flow guiding plate 3). When it reaches the first flow guiding plate 3, part of the water flow is led out of the packing cylinder 1 along the arc hypotenuse of the first flow guiding plate 3 and circulates downward, and then flows into the bottom of the packing cylinder 1 again; another part of the water flow flows through the middle of the first flow guiding plate 3 and flows in the packing cylinder 1 to the second flow guiding plate 3. Part of the water flow is led out of the packing cylinder 1 along the arc hypotenuse of the second flow guiding plate 3 and circulates downward, and another part of the water flow flows through the middle of the second flow guiding plate 3 and flows in the packing cylinder 1 to the third flow guiding plate 3, forming a water flow cycle.

[0030] Furthermore, the wastewater biofilm reactor based on the packing cylinder 1 includes a plurality of flow guiding plates 3, and the plurality of flow guiding plates 3 are sequentially arranged in the packing cylinder 1 along the length direction of the packing cylinder 1.

[0031] Furthermore, any two adjacent flow guiding plates 3 are arranged at an interval of 0.3 m - 1 m.

[0032] Furthermore, the angle of the hypotenuse of the flow guiding plate 3 is 60°.

[0033] It can be understood that the sizes, shapes and spacings of the flow guiding plates 3 are equal. Under the action of the flow guiding plates 3, the sewage in the packing cylinder 1 is discharged out of the packing cylinder 1 through the surface of the packing cylinder 1 at regular intervals, so that the sewage forms a cycle inside and outside the packing cylinder 1, increasing the contact between the sewage and the biofilm; the angle between the flow guiding plate 3 and the packing cylinder 1 and the spacing between the flow guiding plates 3 can be converted according to the actual situation.

[0034] Furthermore, microorganisms adhere to the surface of the packing cylinder 1.

[0035] It can be understood that the inside of the packing cylinder 1 is covered by a layer of biological sludge rich in micro-animals such as protozoa and metazoans. When the sewage flows through the packing cylinder 1, the dissolved organic pollutants in the sewage are captured by the microorganisms, and the sewage is purified.

[0036] Furthermore, the packing cylinder 1 is made of polypropylene multifilament yarn, and the packing cylinder 1 is made after the polypropylene multifilament yarn is subjected to air treatment, heating, and compression deformation.

[0037] It can be understood that the packing cylinder 1 is made of polypropylene multifilament yarn. First, the polypropylene multifilament yarn is subjected to air treatment (heating and compression) to improve its adsorption capacity and facilitate repeated use. The specially treated polypropylene multifilament yarn after air treatment is woven into a honeycomb mesh planar structure and made into a long cylindrical shape to prepare the circulating flow hanging film packing cylinder 1.

[0038] Furthermore, the diversion component 2 is an aeration device, and the aeration head of the aeration device faces the bottom of the packing cylinder 1.

[0039] It can be understood that the aeration device introduces air into the packing cylinder 1 to form a gas-lift effect, so that the sewage forms an upward flow state in the packing cylinder 1, forming a reverse flow structure.

[0040] Furthermore, the wastewater biofilm reactor based on the packing cylinder further includes a bracket 4, and the packing cylinder 1 is fixed on the bracket 4.

[0041] It can be understood that the packing cylinder 1 is fixed on the bracket 4 to make the packing cylinder 1 cylindrical, and the bracket 4 mainly plays a supporting role.

[0042] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A wastewater biofilm reactor based on a packing cylinder, characterized in that Comprising: A stuffing cylinder, the stuffing cylinder being honeycomb-shaped; A flow guiding assembly, the flow guiding assembly being arranged on the lower side of the stuffing cylinder; A flow guiding plate, the flow guiding plate being fixed in the stuffing cylinder along the length direction of the stuffing cylinder; Wherein, the flow guiding plate is in a hollow frustum shape, and the upper bottom surface of the flow guiding plate faces the flow guiding assembly.

2. The wastewater biofilm reactor based on a packing cylinder according to claim 1, wherein The wastewater biofilm reactor based on the stuffing cylinder comprises a plurality of the flow guiding plates, and the plurality of flow guiding plates are sequentially arranged in the stuffing cylinder along the length direction of the stuffing cylinder.

3. The wastewater biofilm reactor based on a packing cylinder according to claim 2, wherein, Any two adjacent flow guiding plates are arranged at an interval of 0.3 m - 1 m.

4. The wastewater biofilm reactor based on a packing cylinder according to claim 1, wherein Microorganisms are adhered to the surface of the stuffing cylinder.

5. The wastewater biofilm reactor based on a packing cylinder according to claim 1, characterized in that, The stuffing cylinder is made of polypropylene multifilament yarn, and the stuffing cylinder is made after polypropylene air treatment and heat compression deformation.

6. The wastewater biofilm reactor based on a packing cylinder according to claim 1, characterized in that, The angle of the hypotenuse of the flow guiding plate is 60°.

7. The wastewater biofilm reactor based on a packing cylinder according to claim 1, wherein The flow guiding assembly is an aeration device, and the aeration head of the aeration device faces the bottom of the stuffing cylinder.

8. The wastewater biofilm reactor based on a packing cylinder according to claim 1, characterized in that, The wastewater biofilm reactor based on the stuffing cylinder further comprises a bracket, and the stuffing cylinder is fixed on the bracket.

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