Large-elevation-angle spiral-flow aerator

Abstract

The utility model discloses a large-elevation-angle spiral-flow aerator which comprises a flange fixed air inlet, an air inlet pipe in an aeration cylinder, a cyclone and a large-elevation-angle cutter, the cutter comprises inclined mushroom-head-shaped cutting column heads which are arranged in a staggered manner, and the cutting column heads have the same elevation angle and different sizes; the axial surface of the cutting column head has an elevation angle in the airflow facing direction; the air inlet end of the air inlet pipe is connected with the flange fixing air inlet, the exhaust end of the air inlet pipe is located under the swirler, and the large-elevation-angle cutter is located over the swirler. Annular mixed rotational flow generated by the swirler can interact with the cutter more efficiently, so that the aeration efficiency and the utilization rate of raw materials are improved; the large-elevation cutter can generate a large number of tiny bubbles which are difficult to obtain by a common spiral-flow aerator, and can effectively retain the tiny bubbles and form a strong bubble column to be sprayed into a reaction tank, so that the oxygenation efficiency of the aerator and the oxygenation upper limit of the aerator under continuous work are improved; and the aerator can generate higher negative pressure to stir sludge in a larger drainage basin.

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment equipment, and mainly relates to a large elevation angle cyclone aerator. Background Art

[0002] In order to solve the problems of easy clogging and short service life of tubular or microporous aerators in sewage treatment, the Chinese utility model patent with patent number CN211813655U discloses a cyclone aerator, whose structure includes an air inlet elbow, a cyclone and a cutter. Different from traditional tubular or microporous aerators, the cyclone aerator generates bubbles by means of the rotation and collision between the airflow and solids and liquids, and at the same time fully mixes the bubbles with the sewage to achieve the effect of increasing the oxygen capacity in the reaction tank. In addition, the strong negative pressure generated by the rapid upward movement of the airflow can suck the sludge deposited at the bottom of the pool into the aerator for stirring and breaking up the condensate. This working mode avoids the clogging problem of traditional aerators, and the aeration performance will not decrease significantly with the increase of usage time. However, since the head of the cutter is close to the wall, most of the gas is directly ejected from the aerator outlet without the action of the cutter, and the diameter of the bubbles generated is generally large and the raw material utilization rate is low;

[0003] Moreover, the cutters of the aerator are arranged densely, which will cause great obstruction to the flow of sewage in this area, resulting in reduced suction and stirring effects of the cyclone aerator. At the same time, the accumulation of sludge in this part will also hinder the action of the airflow and the cutters, correspondingly reducing the efficiency of bubble generation.

[0004] The intake pipe nozzle is facing upwards, but the gas enters the pipe laterally from the side, which causes the gas to lose some speed when passing through the elbow due to obstruction of the pipe and obstruction of boundary layer flow, which undoubtedly increases energy consumption. At the same time, the collision of high-speed gas also increases the risk of damage to the intake pipe.

[0005] The above reasons also jointly lead to the aerator's inability to produce a sufficient number of tiny bubbles to increase the dissolved oxygen rate, making the cyclone aerator slightly inferior to the traditional aerator in aeration capacity. Utility Model Content

[0006] To solve the above problems, this application adopts the following technical solutions:

[0007] The present application provides a large-angle cyclone aerator, comprising a flange-fixed air inlet, an air inlet pipe, a cyclone and a large-angle cutter arranged inside an aeration cylinder, wherein the large-angle cutter comprises two staggered inclined mushroom-head-shaped cutting column heads, the two inclined mushroom-head-shaped cutting column heads have the same elevation angle and different sizes; an axial surface of the cutting column head is provided with an elevation angle in the direction of incident airflow; the air inlet end of the air inlet pipe is connected to the flange-fixed air inlet, the exhaust end of the air inlet pipe is located directly below the cyclone, and the large-angle cutter is located directly above the cyclone.

[0008] Through the above technical scheme, the shape of the mushroom head can make the airflow and large bubbles form a large speed difference when passing through its surface under the premise of less speed loss, so that they are broken into smaller bubbles. The axial surface of the cutting column head is provided with a large elevation angle in the direction of the incoming airflow, so that when it collides with the bubble, the bubble forms a large speed difference on its upper and lower surfaces and the front and rear ends, so that a bubble group with a smaller diameter can be generated in this process, and due to the existence of the speed difference, they can be quickly dispersed and difficult to merge after the collision; the staggered arrangement of large and small columns in the axial and radial directions makes the cutter cover a wider range, and at the same time, the larger gap also avoids the large loss of flow rate and the large accumulation of sludge, ensuring the continuous operation efficiency of the aerator; the large elevation angle cutter enables the aerator to produce a large number of tiny bubbles that are difficult to obtain with ordinary cyclone aerators, and can effectively retain these tiny bubbles and form a strong bubble column to spray it into the reaction tank, thereby improving the oxygenation efficiency of the aerator and improving the upper limit of oxygenation of the cyclone aerator under continuous operation.

[0009] Preferably, the intersection of the horizontal section and the vertical section of the air inlet pipe includes two 45° elbows connected in series, and the vertical section of the air inlet pipe is coaxial with the aeration cylinder, which reduces the loss of gas flow rate and makes the transition from horizontal speed to vertical speed smoother; the vertical section of the air inlet pipe is coaxial with the aeration cylinder to ensure symmetrical flow of gas in the aerator.

[0010] Preferably, the exhaust end of the air inlet pipe is provided with a constriction, which can increase the flow rate of the gas before entering the cyclone part, which can not only increase the negative pressure and strengthen the extraction of the bottom sludge, but also enable the gas and liquid to be efficiently mixed in the cyclone.

[0011] Preferably, the cyclone is composed of a plurality of cyclone guide plates and cyclone guide columns, wherein the outer sides of the plurality of cyclone guide plates are connected to the aeration cylinder, and the inner sides are connected to the cyclone guide columns. Since the centrifugal force of the cyclone will cause the gas with a lower density to gather toward the center, the guide column plays a role in preventing excessive gas aggregation in the cyclone.

[0012] Preferably, there are two swirl guide plates.

[0013] Preferably, the lower end of the swirl guide column is pointed and the upper end is round. The lower end of the flow column is pointed, which helps the gas ejected from the intake pipe to diffuse to the surroundings while reducing speed loss; the upper end of the guide column is rounded, which slows down the formation of the central airflow column with little effect on the swirl speed.

[0014] Preferably, the flange-fixed air inlet is arranged outside the aeration cylinder by hoisting / bottom mounting.

[0015] Preferably, a pipe opening groove is arranged around the flange fixed air inlet to facilitate the installation of the pipeline and ensure the installation accuracy of the pipeline, while avoiding pipeline separation and gas leakage caused by a large impact.

[0016] Preferably, the axial surface of the cutting column head is provided with an elevation angle of 20° to 60° in the direction of the incoming airflow. The top of the cutting column head is a rotating body, and the angle formed by the plane formed by any point on it rotating around the rotating axis and the airflow direction is the elevation angle of the cutting head. In general designs, this elevation angle is 0° in an ideal state, and is only about 0° to 20° in actual use. The elevation angle of the high-elevation-angle cutting head is about 20° to 60°.

[0017] Preferably, the cutting column head is connected to the wall of the aeration cylinder through a short cylinder.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The guide column enables the annular mixed cyclone generated by the cyclone to interact with the cutter more efficiently, thereby improving the aeration efficiency and raw material utilization rate; the large-angle cutter is set so that the aerator can produce a large number of tiny bubbles that are difficult to obtain with ordinary cyclone aerators, and can effectively retain these tiny bubbles and form a strong bubble column to spray them into the reaction tank, thereby improving the oxygenation efficiency of the aerator and increasing the upper limit of oxygenation of the cyclone aerator under continuous operation; the aerator can generate a larger negative pressure to stir the sludge in a larger basin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the utility model. It will be easy to recognize many expected advantages of other embodiments and embodiments because they become better understood by reference to the following detailed description. The elements of the accompanying drawings are not necessarily in proportion to each other. The same reference numerals refer to corresponding similar parts.

[0021] Figure 1 This is a schematic structural diagram of a large elevation angle cyclone aerator according to an embodiment of the utility model;

[0022] Figure 2This is a structural diagram of the intake pipe nozzle necking according to an embodiment of the utility model;

[0023] Figure 3 is a structural diagram of a cyclone according to an embodiment of the utility model;

[0024] Figure 4 This is a structural diagram of a flange-fixed air inlet according to an embodiment of the utility model;

[0025] Figure 5 is a structural diagram of a cutter according to an embodiment of the utility model;

[0026] The meaning of the numbers in the figure are: 1-flange fixed air inlet, 2-aeration cylinder, 3-inlet pipe, 4-cyclone, 5-high-angle cutter, 6-cutting column head, 7-cyclone guide plate, 8-cyclone guide column. DETAILED DESCRIPTION

[0027] In the following detailed description, reference is made to the accompanying drawings, which form a part of the detailed description and are shown by illustrative specific embodiments in which the present invention can be practiced. In this regard, directional terms, such as "left", "right", "up", "down", etc., are used with reference to the orientation of the figures described. Because the components of the embodiments can be positioned in several different orientations, directional terms are used for the purpose of illustration and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be adopted in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0028] The utility model proposes a large elevation angle cyclone aerator. Figure 1 This is a schematic diagram of the structure of a large elevation angle cyclone aerator according to an embodiment of the utility model, referring to Figure 1 The aerator of the present application includes a flange-fixed air inlet 1 and an air inlet pipe 3, a cyclone 4 and a large-angle cutter 5 arranged inside an aeration cylinder 2. The large-angle cutter 5 includes two inclined mushroom-head-shaped cutting column heads 6 arranged alternately. The two inclined mushroom-head-shaped cutting column heads 6 have the same elevation angle and different sizes; the axial surface of the cutting column head 6 is provided with an elevation angle in the direction of the incoming air flow; the air inlet end of the air inlet pipe 3 is connected to the flange-fixed air inlet 1, the exhaust end of the air inlet pipe 3 is located directly below the cyclone 4, and the large-angle cutter 5 is located directly above the cyclone 4.

[0029] Specifically, the intersection of the horizontal section and the vertical section of the air inlet pipe 3 includes two 45° elbows connected in series, and the vertical section of the air inlet pipe 3 is coaxial with the aeration cylinder. Replacing the 90° elbow with two 45° elbows reduces the loss of gas flow rate and makes the transition from horizontal speed to vertical speed smoother; the vertical section of the air inlet pipe 3 is coaxial with the aeration cylinder 2 to ensure the symmetrical flow of gas in the aerator.

[0030] refer to Figure 2 The exhaust end of the air inlet pipe 3 is provided with a constriction, which can increase the flow rate of the gas before it enters the cyclone part, which can not only increase the negative pressure and strengthen the extraction of the bottom sludge, but also enable the gas and liquid to be efficiently mixed in the cyclone.

[0031] refer to Figure 3 The cyclone 4 is composed of a plurality of cyclone guide plates 7 and cyclone guide columns 8. Since the centrifugal force of the cyclone will cause the gas with lighter density to gather toward the center, the guide column 8 plays a role in preventing excessive gas aggregation in the cyclone; the lower end of the guide column 8 is a pointed head, which helps the gas ejected from the intake pipe to diffuse to the surroundings while reducing the speed loss; the upper end of the guide column 8 is a round head, which slows down the formation of the central air flow column with little effect on the cyclone speed; in this embodiment, two cyclone guide plates 7 are selected, the outer sides of the two cyclone guide plates 7 are directly connected to the aeration cylinder 2, and the inner sides are connected to the guide column 8, which plays a role in generating cyclone.

[0032] refer to Figure 4 The flange fixed air inlet 1 is the part that connects the aerator to the external pipeline and can be hoisted or bottom mounted; Figure 4 The flange-fixed air inlet 1 is provided with pipe opening grooves around it to facilitate the installation of the pipeline and ensure the installation accuracy of the pipeline, while avoiding pipeline separation and gas leakage caused by large impact. The flange-fixed air inlet 1 can be matched with air inlet pipes 3 of multiple sizes. The installation can be completed by simply hoisting the aerator together with the air inlet pipe 3 to the appropriate depth of the aeration tank. It also has engineering advantages such as intermittent operation and low energy consumption. Only one installation is required without subsequent maintenance, and online installation can be achieved without stopping production. The installation structure is compatible with traditional aeration pipes, and the entire aeration system can be replaced without making too many adjustments to the equipment.

[0033] refer to Figure 5 , the high elevation cutter 5 is arranged in a staggered manner as follows Figure 3 Two kinds of inclined mushroom-shaped cutting stigmas 6 with the same elevation angle but different sizes are shown. The cutting stigma 6 is directly connected to the wall of the aeration cylinder 2 through a short cylindrical structure; the shape of the mushroom head can make the airflow and large bubbles form a large speed difference when passing through its surface with less speed loss, so that they are broken into smaller bubbles. The axial surface of the cutting stigma is provided with a large elevation angle in the direction of the incoming airflow, so that when it collides with the bubbles, the bubbles form a large speed difference on their upper and lower surfaces and front and rear ends, so that a smaller diameter bubble group can be generated in this process, and due to the existence of the speed difference, they can be quickly dispersed and difficult to merge after the collision; the staggered arrangement of large and small stigmas in the axial and radial directions makes the cutter cover a wider range, and at the same time, the larger gap also avoids a large loss of flow rate and a large amount of sludge accumulation, ensuring the continuous operation efficiency of the aerator.

[0034] Specifically, the axial surface of the cutting column head 6 is provided with an elevation angle of 20° to 60° in the direction of the incoming airflow. The top of the cutting column head 6 is a rotating body. The angle formed by the plane formed by any point on it rotating around the rotating axis and the airflow direction is the elevation angle of the cutting head. In general designs, this elevation angle is 0° in an ideal state, and is only about 0° to 20° in actual use. The elevation angle of the large-elevation-angle cutting head is about 20° to 60°.

[0035] Specifically, during use, gas enters the air inlet pipe 3 of the aerator from an external pipeline, completes the conversion from horizontal speed to vertical speed in the air inlet pipe 3, and is accelerated to be ejected after passing through the nozzle of the air inlet pipe 3. Negative pressure is formed to suck the external sludge into the aerator and mix them with each other and enter the cyclone 4. The mixed fluid forms a hollow annular mixed vortex under the joint action of the vortex guide plate 7 and the vortex guide column 8. After the annular mixed vortex enters the large-angle cutter 5, it collides head-on with the cutting column head 6 in the direction of its elevation angle. The violent impact causes a large number of tiny bubbles of different speeds to be generated in the mixed flow. These tiny bubbles gather in the middle in the vortex to form a strong vortex bubble column, which is ejected from the upper outlet of the aerator, decelerated under the action of liquid resistance and diffused to the entire basin. While achieving the aeration effect, the sludge at the bottom follows the mixed flow to be ejected and surges in the basin with less bottom deposition, thereby reducing the maintenance cost of the bottom of the reaction tank.

[0036] The utility model proposes a large-angle cyclone aerator, which achieves the following technical effects: the annular mixed cyclone generated by the cyclone can interact with the cutter more efficiently through the guide column, thereby improving the aeration efficiency and the utilization rate of raw materials; the large-angle cutter is arranged so that the aerator can generate a large number of tiny bubbles that are difficult to obtain with ordinary cyclone aerators, and can effectively retain these tiny bubbles and form a strong bubble column to spray them into a reaction tank, thereby improving the oxygenation efficiency of the aerator and improving the upper limit of oxygenation of the cyclone aerator under continuous operation; the aerator can generate a larger negative pressure to stir the sludge in a larger basin.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The wording 'comprising' does not exclude the presence of elements or steps not listed in the claims. The wording 'one' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The simple fact that certain measures are recorded in mutually different dependent claims does not indicate that a combination of these measures cannot be used for improvement. Any reference symbols in the claims should not be interpreted as limiting the scope.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recorded in mutually different dependent claims does not indicate that the combination of these measures cannot be used to profit. Any figure mark in the claims should not be considered to limit the scope.

Claims

1. A large elevation angle cyclone aerator, characterized in that: It includes a flange-fixed air inlet and an air inlet pipe, a cyclone and a large-angle cutter arranged inside an aeration cylinder. The large-angle cutter includes two staggered inclined mushroom-head-shaped cutting column heads, the two inclined mushroom-head-shaped cutting column heads have the same elevation angle and different sizes; the axial surface of the cutting column head is provided with an elevation angle in the direction of the incoming air flow; the air inlet end of the air inlet pipe is connected to the flange-fixed air inlet, the exhaust end of the air inlet pipe is located directly below the cyclone, and the large-angle cutter is located directly above the cyclone.

2. A large elevation angle cyclone aerator according to claim 1, characterized in that: The intersection of the horizontal section and the vertical section of the air inlet pipe includes two 45° elbows connected in series, and the vertical section of the air inlet pipe is coaxial with the aeration cylinder.

3. A large elevation angle cyclone aerator according to claim 1, characterized in that: The exhaust end of the air inlet pipe is provided with a constriction.

4. A large elevation angle cyclone aerator according to claim 1, characterized in that: The cyclone is composed of a plurality of cyclone guide plates and cyclone guide columns. The outer sides of the plurality of cyclone guide plates are connected to the aeration cylinder, and the inner sides are connected to the cyclone guide columns.

5. A large elevation angle cyclone aerator according to claim 4, characterized in that: The swirl guide plates are two in number.

6. A large elevation angle cyclone aerator according to claim 4, characterized in that: The lower end of the swirl guide column is a pointed head, and the upper end is a round head.

7. A large elevation angle cyclone aerator according to claim 1, characterized in that: The flange fixed air inlet is arranged outside the aeration cylinder by hoisting / bottom mounting.

8. A large elevation angle cyclone aerator according to claim 1, characterized in that: A pipe opening groove is arranged around the flange fixed air inlet.

9. A large elevation angle cyclone aerator according to claim 1, characterized in that: The axial surface of the cutting column head is provided with an elevation angle of 20° to 60° in the direction of the incoming airflow.

10. A large elevation angle cyclone aerator according to claim 1, characterized in that: The cutting column head is connected to the cylinder wall of the aeration cylinder through a short cylinder.

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