阅读说明：本技术 射流气浮装置 (Jet flow air floating device ) 是由 程晓东 马和旭 王雪清 马传军 陈天佐 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种射流气浮装置,其包括：气浮室,其侧壁上部设有排油口,下部设有出液口；搅拌腔,其设置在气浮室内,搅拌腔的上端设有进液口；搅拌装置,其设置在搅拌腔内,搅拌装置包括：旋转轴,其为空心轴,该旋转轴与气体源相连通；多个管状搅拌桨,其由旋转轴呈放射状向外延伸；以及多个一级射流器,其吸气口与管状搅拌桨的端部相连通；以及多个二级射流器,其均匀分布在搅拌腔的外侧,二级射流器将搅拌腔与气浮室连通,二级射流器的吸气口与气体源相连通。本发明的射流气浮装置通过内外两级射流,兼有射流气浮、叶轮气浮和溶气气浮的特点,增加了液体流速和气浮气体量,从而强化了装置的气浮能力。(The invention discloses a jet flow air flotation device, which comprises: the upper part of the side wall of the air floating chamber is provided with an oil discharge port, and the lower part of the side wall of the air floating chamber is provided with a liquid outlet; the stirring cavity is arranged in the air floatation chamber, and the upper end of the stirring cavity is provided with a liquid inlet; agitating unit, its setting is in the stirring intracavity, and agitating unit includes: the rotating shaft is a hollow shaft and communicated with a gas source; a plurality of tubular paddles extending radially outward from the rotating shaft; and a plurality of first-stage ejectors, wherein air suction ports of the first-stage ejectors are communicated with the end part of the tubular stirring paddle; and the secondary ejectors are uniformly distributed on the outer side of the stirring cavity, the stirring cavity is communicated with the air floatation chamber by the secondary ejectors, and an air suction port of each secondary ejector is communicated with the gas source. The jet flow air floatation device has the characteristics of jet flow air floatation, impeller air floatation and dissolved air floatation through the inner and outer two-stage jet flow, and increases the liquid flow rate and the air floatation gas quantity, thereby strengthening the air floatation capacity of the device.)

1. A jet air flotation device, comprising:

the upper part of the side wall of the air floating chamber is provided with an oil discharge port, and the lower part of the side wall of the air floating chamber is provided with a liquid outlet;

the stirring cavity is arranged in the air floatation chamber, and a liquid inlet is formed in the upper end of the stirring cavity;

agitating unit, its setting is in the stirring intracavity, agitating unit includes:

the rotating shaft is a hollow shaft and communicated with a gas source;

a plurality of tubular paddles extending radially outward from the rotating shaft; and

the air suction ports of the primary ejectors are communicated with the end parts of the tubular stirring paddles; and

and the plurality of secondary ejectors are uniformly distributed on the outer side of the stirring cavity, the stirring cavity is communicated with the air flotation chamber by the secondary ejectors, and an air suction port of each secondary ejector is communicated with the gas source.

2. The jet air flotation device according to claim 1, wherein the primary jet device has an axial direction perpendicular to the rotating shaft and the tubular stirring paddle.

3. The jet air flotation device according to claim 2, wherein the end face of the nozzle of the primary ejector is inclined inward; the end surface of the diffusion pipe of the primary ejector inclines outwards.

4. The jet air-flotation device as claimed in claim 1, wherein the axial direction of the primary ejector is perpendicular to the rotation axis, and the end of the primary ejector where the nozzle is located is inclined toward the rotation axis.

5. The jet air flotation device according to claim 1, wherein the number of the primary ejectors is less than or equal to the number of the tubular paddles.

6. The jet air flotation device according to claim 5, wherein the number of the plurality of tubular stirring paddles is 2-6; the number of the secondary ejectors is 2-6.

7. The jet air flotation device according to claim 1, wherein the stirring chamber is conical, and the liquid inlet is arranged at the vertex of the conical shape.

8. The jet air flotation device according to claim 1, wherein the air flotation chamber is cylindrical, and the stirring cavity is coaxial with the air flotation chamber.

9. The jet air flotation device according to claim 8, wherein the oil discharge port is multiple and evenly distributed along the circumference of the air flotation chamber.

10. The jet air flotation device according to claim 9, wherein the number of oil discharge ports is the same as the number of secondary ejectors.

11. The jet air flotation device according to claim 10, wherein the oil discharge ports correspond to the secondary ejectors one-to-one in the vertical direction.

12. The jet air flotation device according to claim 1, wherein a baffle is disposed between the liquid outlet and the secondary ejector.

13. The jet air flotation device according to claim 1, wherein the top end of the air flotation chamber is provided with an exhaust port.

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a jet flow air flotation device.

Background

In the water treatment industry, air floatation equipment is generally used for separating oil or light suspended substances from water. The air flotation treatment technology can be classified into electrolytic coagulation air flotation, dissolved air flotation, impeller type air flotation, jet flow air flotation, and the like according to the method of generating bubbles. The jet flow air floating method is to utilize the principle of jet pump, adopt sewage or purified water as jet liquid, when the liquid is sprayed out from the nozzle at high speed, form negative pressure in the suction chamber of the nozzle, the gas is sucked into the suction chamber, when the liquid passes through the mixing section at high speed, the carried gas is sheared into fine bubbles, in the air floating chamber, the bubbles float upwards, and adhere to oil globules or solid particles, bring them to the water surface. However, the existing jet flow air floatation equipment has small air floatation gas amount, needs high liquid flow rate, is not easy to separate oil and suspended matters in the liquid, and is not thorough in treatment.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

One of the objectives of the present invention is to provide a jet air floating device, so as to solve the problems of high liquid flow rate and small air floating gas amount required by jet air floating equipment in the prior art.

In order to achieve the above object, the present invention provides a jet air floating device, comprising: the upper part of the side wall of the air floating chamber is provided with an oil discharge port, and the lower part of the side wall of the air floating chamber is provided with a liquid outlet; the stirring cavity is arranged in the air floatation chamber, and the upper end of the stirring cavity is provided with a liquid inlet; agitating unit, its setting is in the stirring intracavity, and agitating unit includes: the rotating shaft is a hollow shaft and communicated with a gas source; a plurality of tubular paddles extending radially outward from the rotating shaft; and a plurality of first-stage ejectors, wherein air suction ports of the first-stage ejectors are communicated with the end part of the tubular stirring paddle; and the secondary ejectors are uniformly distributed on the outer side of the stirring cavity, the stirring cavity is communicated with the air floatation chamber by the secondary ejectors, and an air suction port of each secondary ejector is communicated with the gas source.

Further, in the above technical scheme, the axial direction of the first-stage ejector is respectively perpendicular to the rotating shaft and the tubular stirring paddle.

Further, in the above technical scheme, the end face of the nozzle of the first-stage ejector is inclined inwards; the end surface of the diffusion pipe of the first-stage jet device inclines outwards.

Further, in the above technical scheme, the axial direction of the first-stage ejector is perpendicular to the rotating shaft, and one end of the first-stage ejector where the nozzle is located is inclined to the rotating shaft.

Further, in the above technical scheme, the number of the first-stage ejectors is less than or equal to the number of the tubular stirring paddles.

Further, in the technical scheme, the number of the plurality of tubular stirring paddles is 2-6; the number of the secondary ejectors is 2-6.

Furthermore, in the above technical scheme, the stirring cavity is conical, and the liquid inlet is arranged at the vertex of the conical.

Further, among the above-mentioned technical scheme, the air supporting chamber is cylindric structure, and the stirring chamber sets up with the air supporting chamber is coaxial.

Further, among the above-mentioned technical scheme, the oil drain port is a plurality of to along the even distribution of air supporting chamber circumference.

Further, in the above technical scheme, the number of the oil discharge ports is the same as the number of the secondary ejectors.

Further, among the above-mentioned technical scheme, oil drain port and second grade ejector are in vertical direction one-to-one correspondence.

Further, in the above technical scheme, a baffle is arranged between the liquid outlet and the secondary ejector.

Furthermore, in the above technical scheme, the top end of the air flotation chamber is provided with an exhaust port.

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

1. the jet flow air floatation device provided by the invention has the characteristics of jet flow air floatation, impeller air floatation and dissolved air floatation through inner and outer two-stage jet flow, and increases the liquid flow rate and the air floatation gas quantity, thereby enhancing the air floatation capacity of the device.

2. The one-level jet device is arranged at the end part of the tubular stirring paddle, gas is sucked into the stirring device through high-speed rotation, liquid with higher pressure is generated in the stirring cavity, and the solubility of the gas is increased.

3. The end surface design of the primary ejector increases the liquid inlet area of the nozzle, and has large liquid inlet amount, high liquid flow rate and better gas-liquid mixing effect; the inclined end face of the diffusion pipe plays a role in guiding flow, so that jet liquid can more easily enter the secondary ejector on the side wall of the stirring cavity to perform secondary jet.

4. The jet flow air flotation device is simple in structure, and can reduce the floor area of the device by adopting the cylindrical air flotation chamber which is coaxially arranged with the stirring cavity.

5. The oil drain port and the two-stage ejector are correspondingly arranged, so that the oil draining efficiency can be improved, and the oil draining is more uniform.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means implementable in accordance with the contents of the description, and to make the above and other objects, technical features, and advantages of the present invention more comprehensible, one or more preferred embodiments are described below in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a jet air flotation device according to an embodiment of the invention.

Fig. 2 is a schematic structural view of a stirring device according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a stirring apparatus according to another embodiment of the present invention.

Description of the main reference numerals:

10-air floating chamber, 11-oil outlet, 12-liquid outlet, 121-baffle, 13-air outlet, 20-stirring chamber, 21-liquid inlet pipe, 211-liquid inlet, 22-air inlet pipe, 30-stirring device, 31-rotating shaft, 32-tubular stirring paddle, 33 a-primary ejector, 331-air suction port, 332 a-nozzle, 3321 a-nozzle end face, 333 a-diffusion pipe, 3331-diffusion end face, 34-motor, 40-secondary ejector and 41-air inlet pipe.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.

As shown in fig. 1 to 2, the jet flow air flotation device according to the embodiment of the invention includes an air flotation chamber 10, an oil discharge port 11 is provided at an upper portion of a sidewall of the air flotation chamber 10, and a liquid outlet 12 is provided at a lower portion thereof. A stirring cavity 20 is arranged in the air floating chamber 10, a liquid inlet 211 is arranged at the upper end of the stirring cavity 20, and the liquid inlet 211 is communicated with a liquid inlet pipe 21. The stirring chamber 20 is provided with a stirring device 30 therein, and the stirring device 30 includes a rotating shaft 31, a tubular stirring paddle 32 and a first-stage ejector 33 at an end thereof. The rotating shaft 31 is a hollow shaft, and the gas source is communicated with the suction port 331 of the primary ejector 33 through the rotating shaft 31 and the tubular stirring paddle 32. When the stirring device 30 is driven by the motor 34 to rotate and stir at a high speed, the primary ejector 33 at the end of the tubular stirring paddle 32 is driven to rotate at a high speed around the rotating shaft 31, and the liquid in the stirring cavity 20 forms a negative pressure, so that the gas is sucked from the gas source through the gas inlet pipe 22. The gas source may be atmospheric air or low pressure air, or nitrogen, in some cases where it is not desirable to introduce oxygen. When the gas source is atmospheric air, one end of the air inlet pipe 22 is communicated with the atmosphere, and an air storage device is not required. The gas enters the first-stage ejector 33 through the gas suction port 331 along the rotating shaft 31 and the tubular stirring paddle 32 in sequence; in the stirring chamber 20, liquid passes through one-level ejector 33 at a high speed and is mixed with gas, and the solubility of gas increases, and the gas-liquid mixture effect is better. The outer side of the stirring cavity 20 of the jet flow air flotation device is also provided with a secondary ejector 40, the stirring cavity 20 is communicated with the air flotation chamber 10 by the secondary ejector 40, and an air suction port of the secondary ejector 40 is communicated with a gas source. Illustratively, the suction port of the secondary ejector 40 may be in communication with a gas source via an inlet tube 41. When the gas source is atmospheric air, one end of the air inlet pipe 41 is communicated with the atmosphere, and an air storage device is not required. The liquid which is stirred and mixed by the stirring device 30 passes through the secondary ejector 40 at a high speed to be mixed with the gas entering the gas suction port again, and then the mixed gas is injected into the air flotation chamber 10. The oil and suspended matters in the air floating chamber 10 are floated to the oil discharge port 11 and discharged, and the liquid after air floating treatment is discharged through the liquid outlet 12. Illustratively, a baffle 121 is disposed between the liquid outlet 12 and the secondary ejector 40 to prevent the secondary ejector 40 from directly jetting to the liquid outlet 12. It should be understood that the baffle 121 may not be provided when the secondary ejector 40 is not disposed opposite the liquid outlet 12. Illustratively, the top end of the air flotation chamber 10 may be provided with an exhaust port 13, and the exhaust gas in the air flotation chamber 10 may be exhausted through the exhaust port 13. The exhaust port 13 may also be connected to a corresponding processing device if the exhaust gas in the air bearing chamber 10 contains pollutants or needs to be recycled, and the invention is not limited thereto.

Further, in one or more exemplary embodiments of the present invention, the axial direction of the primary ejector 33 is perpendicular to the tubular paddle 32. Illustratively, the nozzle end face 3321 of the nozzle 332 of the primary ejector 33 is inclined inward, i.e., the side of the nozzle 332 close to the rotary shaft 31 is shorter. Therefore, the liquid inlet area of the first-stage ejector 33 is increased, more liquid can enter the nozzle 332 in the rotating process, and the speed of the liquid is higher. The diffusion end surface 3331 of the diffusion tube 333 of the primary ejector 33 is inclined outward, that is, the side of the diffusion tube 333 close to the rotary shaft 31 is long. Thereby, the liquid ejected from the primary ejector 33 is guided to the secondary ejector 40 on the side wall of the agitation chamber 20.

As shown in fig. 3, in one or more exemplary embodiments of the present invention, the axial direction of the primary ejector 33a is perpendicular to the rotation axis 31 and is not perpendicular to the tubular paddle 32, the end of the primary ejector 33a where the nozzle 332a is located is inclined toward the rotation axis 31, and the end of the diffuser 333a where the diffuser 333a is located is away from the rotation axis 31. The design of the primary ejector 33a inclined with respect to the tubular stirring paddle 32 allows the liquid intake of the nozzle 332a to be increased. Preferably, the nozzle end surface 3321a of the nozzle 332a is coplanar with the center line of the rotary shaft 31, to which the present invention is not limited.

Further, in one or more exemplary embodiments of the present invention, the number of the primary ejectors 33 may be smaller than or equal to the number of the tubular paddles 32. Each end of the tubular stirring paddle 32 may be provided with one primary ejector 33, as shown in fig. 2, and the number of the tubular stirring paddle 32 and the primary ejectors 33 is two. In another embodiment, the primary ejectors 33 may be disposed at intervals at the end of the tubular paddle 32, for example, four tubular paddles 32 are provided, and two primary ejectors 33 are disposed at intervals at the end of the tubular paddle 32. It should be understood that the number of the tubular stirring paddles 32 and the primary ejectors 33 is not limited thereto, and those skilled in the art can select them according to the actual requirement, for example, 2 to 6. Preferably, the tubular paddles 32 and the primary ejectors 33 are uniformly distributed around the circumference of the rotating shaft 31. The number of the secondary ejectors 40 can also be selected according to actual needs, for example, 2 to 6, and is preferably uniformly distributed on the side wall of the stirring chamber 20.

Preferably, but not limitatively, in one or more exemplary embodiments of the invention, the stirring chamber 20 is of a conical type, with the liquid inlet 211 being provided at the apex of the conical type. The air flotation chamber 10 can be a cylindrical structure, and the stirring cavity 20 and the air flotation chamber 10 can be coaxially arranged.

Preferably, but not limitatively, in one or more exemplary embodiments of the present invention, the oil discharge port 11 may be provided in plurality and uniformly distributed in the circumferential direction of the air bearing chamber 10. The number of the oil discharge ports 11 may be the same as that of the secondary ejectors 40, one to one in the vertical direction.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.