CN215924451U

CN215924451U - Dissolved air tank

Info

Publication number: CN215924451U
Application number: CN202121976920.9U
Authority: CN
Inventors: 邓舟; 连红民; 彭冲; 范永信; 毛智博; 阮锦涛; 刘锦伦; 肖建强
Original assignee: Shenzhen Lisai Environmental Protection Technology Co ltd
Current assignee: Shenzhen Lisai Environmental Protection Technology Co ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-03-01
Anticipated expiration: 2031-08-20

Abstract

The application is suitable for the technical field of wastewater treatment, and particularly provides a dissolved air tank which comprises a tank body, at least two baffle plates and a stirring mechanism; the tank body is provided with a containing cavity, the top of the tank body is provided with an air inlet and a water inlet, the bottom of the tank body is provided with a water outlet, and the air inlet direction of the air inlet is vertical to the water inlet direction of the water inlet, so that air and liquid entering the containing cavity are intersected at a preset position; the baffle plates are arranged in the tank body and are distributed in the vertical direction, the preset position is positioned at the upper side of the baffle plate at the top, the baffle plates are provided with water passing ports, and the water passing ports corresponding to two adjacent baffle plates are respectively arranged in a staggered manner in the vertical direction; the stirring mechanism is arranged between two adjacent baffle plates, the stirring mechanism comprises a stirring shaft, and a fixed stirring sheet and a movable stirring sheet which are rotated by the stirring shaft, and the movable stirring sheet can move along the length direction of the stirring shaft. The gas tank aims at solving the technical problem that high-efficiency gas dissolution cannot be realized because a filler type gas tank is not used in the prior art.

Description

Dissolved air tank

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a dissolved air tank.

Background

The air floatation method is to introduce air into the wastewater and separate out the air in the form of micro-bubbles from the water to form a carrier, so that pollutants such as emulsified oil, micro suspended particles and the like in the wastewater are adhered to the bubbles and float to the water surface along with the bubbles to form a three-phase mixture of foam, air, water and particles (oil), and the purposes of separating impurities and purifying the wastewater are achieved by collecting the foam or scum. At present, the pressure dissolved air float method is most widely applied, and the core equipment of the method comprises a pressure dissolved air system consisting of a water pump, an air compressor and a pressure dissolved air tank. Water and air are respectively conveyed into a dissolved air tank through a water pump and an air compressor, air-water fusion is carried out under certain pressure (0.4-0.6MPa), and then dissolved air water is released in wastewater through a releaser to form micro bubbles, so that the adhesion to pollutants is realized. The dissolved air tank is usually absorbed by filler, the dissolved air efficiency can reach more than 80 percent, and the dissolved air tank is the most widely applied dissolved air tank type at present. However, most sewage plants adopt return water as water inlet of the dissolved air tank, the return water contains certain suspended matters, and the problem of filler blockage can be caused by long-time operation, so that the operation failure rate of air floatation and the maintenance frequency of the dissolved air tank are high, and if the filler type dissolved air tank is not used, the dissolved air efficiency is not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a dissolved air tank, and aims to solve the technical problem that high-efficiency air dissolution cannot be realized because a filler-free dissolved air tank in the prior art is not used.

In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a dissolved air tank comprising:

the tank body is provided with a containing cavity, the top of the tank body is provided with an air inlet and a water inlet, the bottom of the tank body is provided with a water outlet, and the air inlet direction of the air inlet is vertical to the water inlet direction of the water inlet, so that gas and liquid entering the containing cavity are intersected at a preset position;

the baffle plates are arranged in the tank body and are distributed in the vertical direction, the preset positions are positioned on the upper sides of the baffle plates at the tops, the baffle plates are provided with water passing ports, and the water passing ports corresponding to the two adjacent baffle plates are arranged in a staggered mode in the vertical direction; and

the stirring mechanism comprises a stirring shaft capable of rotating around the axis of the stirring mechanism, and a fixed stirring sheet and a movable stirring sheet which rotate by means of the rotation of the stirring shaft, wherein the movable stirring sheet can move along the axis direction of the stirring shaft, and the fixed stirring sheet and the movable stirring sheet are positioned between two adjacent baffle plates.

In some embodiments of the utility model, one end of the baffle plate adjacent to the water gap extends obliquely upwards.

In some embodiments of the present invention, the stirring mechanism further includes a motor, a power output end of the motor is connected to the stirring shaft, and the stirring shaft sequentially passes through the plurality of baffles.

In some embodiments of the present invention, the number of the fixed stirring blades is two, the stirring shaft extends in the up-down direction and penetrates through the center of the fixed stirring blades, the two fixed stirring blades are arranged in the up-down direction, and the movable stirring blade is located between the two fixed stirring blades.

In some embodiments of the utility model, at least two connecting rods are arranged between two fixed stirring pieces, the movable stirring piece slides through the connecting rods and the stirring shaft through a through hole, a floating body is arranged on the movable stirring piece, and the movable stirring piece can move in the length direction of the stirring shaft by virtue of the buoyancy borne by the floating body in liquid and the liquid impact force borne by the movable stirring piece.

In some embodiments of the present invention, the floating body is provided in a plurality, the floating body is provided on the upper surface of the movable stirring blade, the floating body is cylindrical, and a plurality of spaced blades are provided around the floating body.

In some embodiments of the present invention, a spring is sleeved on the connecting rod, the spring is located between the upper fixed stirring blade and the upper movable stirring blade, and two ends of the spring are respectively connected to the upper fixed stirring blade and the upper movable stirring blade.

In some embodiments of the utility model, the fixed stirring sheet is provided with protrusions for stirring water flow on the upper and lower surfaces, and the protrusions extend outwards along a spiral line away from the stirring shaft.

In some embodiments of the utility model, a hanging ring is further provided on the tank body.

In some embodiments of the utility model, the tank body is further provided with a manhole.

The dissolved air tank provided by the utility model has the beneficial effects that: compared with the prior art, this dissolve gas pitcher does not adopt the form of filler, the jam of waste material to filler has been avoided like this, and in order to make it dissolve the gas effect and not reduce, this dissolve gas pitcher has adopted the stirring and has increased the means of gas and water contact effect, air inlet and water inlet direction are perpendicular and intersect, make area of contact increase, and baffling board has still been adopted, increase the route length of flow, still adopt rabbling mechanism, fixed stirring piece and removal stirring piece can both stir the water among the rabbling mechanism, and remove the stirring piece and can also remove along the length direction of (mixing) shaft, make the stirring effect better, above-mentioned means homoenergetic enough increases the gas effect of dissolving like this, enlarge the liquid phase interface, reduce the liquid film thickness, the collision of gas molecule and hydrone with higher speed, and then improve mass transfer efficiency, avoid appearing the jam problem in the jar.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a dissolved air tank according to an embodiment of the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a tank body; 2. a baffle plate; 3. a water outlet; 4. a water inlet; 5. an air inlet; 6. a water outlet; 7. a stirring shaft; 8. a motor; 9. fixing the stirring sheet; 10. moving the stirring sheet; 11. a connecting rod; 12. a spring; 13. a float; 14. a blade; 15. a protrusion; 16. a hoisting ring; 17. and (6) overhauling holes.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-2, an embodiment of a dissolved air tank according to the present invention includes a tank body 1, at least two baffles 2, and a stirring mechanism; the tank body 1 is provided with a containing cavity, the top of the tank body is provided with an air inlet 5 and a water inlet 4, the bottom of the tank body is provided with a water outlet 6, the air inlet direction of the air inlet 5 is perpendicular to the water inlet direction of the water inlet 4, so that air and liquid entering the containing cavity are intersected at a preset position; the baffle plates 2 are arranged in the tank body 1 and are distributed in the vertical direction, the preset position is positioned at the upper side of the baffle plate 2 at the top, water passing ports 3 are arranged at the end parts of the baffle plates 2, and the water passing ports 3 corresponding to two adjacent baffle plates 2 are respectively arranged in a staggered manner in the vertical direction; the stirring mechanism comprises a stirring shaft 7 capable of rotating around the axis of the stirring mechanism, and a fixed stirring sheet 9 and a movable stirring sheet 10 which rotate by means of the rotation of the stirring shaft 7, wherein the movable stirring sheet 10 can move along the axis direction of the stirring shaft 7, and the fixed stirring sheet 9 and the movable stirring sheet 10 are positioned between two adjacent baffle plates 2.

Specifically, the liquid can be water, in order to realize the gas dissolving efficiency of water, the gas inlet 5 and the water inlet 4 on the top of the tank body 1 are arranged in a state of vertical directions, so that the gas inlet 5 and the water inlet 4 are inevitably intersected when the gas and the water are respectively introduced, a turbulent flow state is formed on a gas-water contact surface, the mass transfer between gas and water is facilitated, the water inlet 4 can be specifically arranged on the side part of the tank body 1, and the gas inlet 5 is arranged on the top of the tank body 1. The tank body 1 is a cylindrical hollow container and is vertically installed, a support is arranged at the bottom, the baffle plates 2 are provided with at least two baffle plates, the baffle plates are arranged in an up-down mode, a certain distance is reserved between every two adjacent baffle plates 2, the baffle plates 2 are arranged in a relatively sealed mode with the inner wall of the tank body 1, a water passing opening 3 is reserved between one end of each baffle plate 2 and the inner wall, upper-layer water can only flow to the lower portion of each baffle plate 2 through the water passing opening 3, the water passing openings 3 of every two adjacent baffle plates 2 are staggered, the staggered distance is the largest, namely, the staggered distance is located at different ends of the two baffle plates 2 respectively, the tank body 1 is divided into a plurality of areas, and a Z-shaped circulation channel is formed, so that water flow can increase a flowing path in the tank body 1, and the gas dissolving effect is improved.

Still set up rabbling mechanism in the gas dissolving tank in this embodiment, rabbling mechanism includes fixed stirring piece 9 and removal stirring piece 10, and both all stir 7 rotations with the help of the (mixing) shaft, and both all perpendicular to (mixing) shaft 7 settings stir the water simultaneously to remove stirring piece 10 and can also remove along the length direction of (mixing) shaft 7, adjust the position of stirring, make more thorough of stirring. The jar is interior to be lasted high-pressure rivers and air and erode, and through lasting stirring, avoids impurity to produce the deposit in the cavity inside, appears blockking up. After being fully mixed in the cavity, the air water is discharged from the water outlet 6 and enters the dissolved air release system. Water flow flows to the water outlet 6 along a Z-shaped channel formed by the inner wall of the tank body 1 and the baffle plate 2, and is disturbed by the stirring effect of the stirring mechanism, so that collision of gas molecules and water molecules is accelerated, and the gas dissolving efficiency is improved.

According to the double-membrane theory, the main resistance of the gas-liquid mixed mass transfer process comes from the liquid membrane, and the key point is to enlarge the liquid phase interface or reduce the thickness of the liquid membrane in order to strengthen the gas dissolving process except for having enough mass transfer driving force. By adopting the dissolved air tank of the embodiment, the Z-shaped circulation channel and the stirring mechanism increase the turbulent state of water flow on one hand, and accelerate the collision of gas molecules and water molecules on the other hand, thereby improving the mass transfer efficiency. Meanwhile, the aperture of the Z-shaped circulation channel is far larger than that of a water flow channel of the filler type dissolved air tank, and the problem of blockage in the tank is avoided due to the stirring effect of the stirring mechanism.

In one embodiment, as shown in fig. 1, in order to increase the turbulence effect of the water flow, the flocculation flow is increased, so that a raised portion is further provided on the baffle 2, the raised portion is a part of the plate body of the baffle 2, and the raised portion extends obliquely upward and is specifically arranged at a position close to the water gap 3, so that the flocculation flow can be generated by further disturbance when entering the water gap 3.

The ascending plate body setting of slope has been set up in this embodiment, makes rivers can be in further emergence disturbance of slope department, increases the wadding and flows the effect, increases the collision of gas and water, improves mass transfer efficiency, increases and dissolves the gas effect.

As shown in fig. 1, the stirring mechanism further includes a motor 8, the motor 8 is a power source, and is disposed outside the tank body 1, specifically, on the top of the tank body 1, and is disposed in an inverted manner, a power output end of the motor is connected to a stirring shaft 7, the stirring shaft 7 extends into the tank body 1, and penetrates through each layer of baffle plate 2, and the stirring shaft 7 drives a fixed stirring piece 9 and a movable stirring piece 10 to rotate.

In the embodiment, the operation of the motor 8 has better reliability and stability, can provide continuous power, and ensures the normal operation of the stirring shaft 7.

As shown in fig. 2, the number of the fixed stirring blades 9 may be any number, preferably two fixed stirring blades 9 are provided, both the fixed stirring blades 9 and the stirring shaft 7 are fixedly connected, specifically, the stirring shaft 7 penetrates through the center of the fixed stirring blade 9 and is relatively fixed with the fixed stirring blade 9, both the fixed stirring blade 9 and the movable stirring blade 10 adopt a disc shape, the two fixed stirring blades 9 are arranged in an up-down manner and are aligned and parallel to each other, the movable stirring blade 10 is located between the two fixed stirring blades 9, the stirring shaft 7 also penetrates through the center of the movable stirring blade 10, but slides through, the movable stirring blade 10 can move, and when moving, the distance between the two fixed stirring blades 9 can be changed.

Adopt the form of two fixed stirring pieces 9, be favorable to the stability of structure, increased the dynamics of stirring to remove stirring piece 10 and set up between two fixed stirring pieces 9, fixed stirring piece 9 has produced spacing effect to removing stirring piece 10, guarantees to remove stirring piece 10 and can remove in the within range of predetermineeing.

Further, as shown in fig. 2, two fixed stirring blades 9 are connected by at least two connecting rods 11, so that the overall effect is increased, and the movable stirring blade 10 is arranged in a manner that a through hole is formed in the movable stirring blade 10, the connecting rod 11 passes through the through hole, and the connecting rod 11 is slidably connected with the movable stirring blade 10, so that the movable stirring blade 10 can move between the fixed stirring blades 9, specifically, a floating body 13 is arranged on the movable stirring blade 10, the floating body 13 is made of a material with a density less than that of water, when the movable stirring blade 10 is soaked in water, the movable stirring blade 10 can be moved by the change of water pressure, so that the position of the movable stirring blade 10 is adjustable, namely, the floating force of the liquid on the floating body 13 and the disturbance force or impact force generated by the liquid under the continuous stirring on the movable stirring blade 10 are disturbed and impacted, the moving stirring blade 10 is shaken between the two fixed stirring blades 9.

In this embodiment, connect through connecting rod 11 between two fixed stirring pieces 9, increased the wholeness effect to for removing stirring piece 10 provides the attachment that can remove, played the guide effect to removing stirring piece 10 simultaneously, and at the in-process of stirring, remove stirring piece 10 can be continuous along the orientation of (mixing) shaft 7 take place to remove and the rocking of making a round trip, the vortex effect of increase.

Further, as shown in fig. 2, the floating body 13 is provided in plural, the floating body 13 is provided on the upper surface of the movable stirring blade 10, the floating body 13 is cylindrical, and a plurality of spaced blades 14 are provided on the periphery of the floating body 13.

In the present embodiment, the floating body 13 is provided in plurality, and when the floating body 13 rotates, the floating body 13 itself can stir water, and in order to increase the stirring effect, the floating body 13 is further provided with a plurality of blades 14 on the surface thereof, thereby increasing the turbulent flow effect.

As shown in fig. 2, in order to further ensure that the movable stirring blade 10 moves within a certain range, i.e. the movable stirring blade is not allowed to sink to the degree of contacting with the lower fixed stirring blade 9, and is not allowed to float to the degree of contacting with the upper fixed stirring blade 9, a spring 12 is sleeved on the connecting rod 11, and due to the elasticity, the movable stirring blade 10 does not sink or float excessively, and can stir water and not contact with the upper fixed stirring blade 9 and the lower fixed stirring blade within a certain range, and if the movable stirring blade contacts with the upper fixed stirring blade 9, the distance is insufficient, so that the disturbance effect is poor.

The beneficial effects of this embodiment lie in, not only stir water through fixed stirring piece 9, stir water through removing stirring piece 10 moreover, remove stirring piece 10 and can also rock from top to bottom at the pivoted in-process, increase the vortex effect.

Further, in order to increase the stirring effect, protrusions 15 for stirring water flow are arranged on the upper surface and the lower surface of the fixed stirring sheet 9, and the protrusions 15 extend outwards away from the stirring shaft 7 along a spiral line. The bulge 15 can increase the disturbance effect in the stirring process, increase the flocculation flow effect of water flow, and accelerate the gas dissolution.

Further, a hanging ring 16 is arranged on the tank body 1. Set up rings 16 and increased jar body 1's hoisting point, made things convenient for and maintained.

Furthermore, the tank body 1 is also provided with an access hole 17. The manhole 17 can be opened to perform maintenance on the inside of the can body 1.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A dissolved air tank, comprising:

2. A dissolved air vessel according to claim 1 wherein the baffle is provided with an end adjacent the water gap extending obliquely upwardly.

3. The dissolved air tank of claim 1, wherein the stirring mechanism further comprises a motor, a power output end of the motor is connected with the stirring shaft, and the stirring shaft sequentially passes through the plurality of baffle plates.

4. The dissolved air tank according to any one of claims 1 to 3, wherein the number of the fixed stirring blades is two, the stirring shaft extends in the up-down direction and penetrates through the center of the fixed stirring blades, the two fixed stirring blades are arranged in the up-down direction, and the movable stirring blade is located between the two fixed stirring blades.

5. A dissolved air tank according to claim 4, wherein at least two connecting rods are provided between the two fixed stirring vanes, the moving stirring vane slides through the connecting rods and the stirring shaft through the through hole, and a float is provided on the moving stirring vane, and the moving stirring vane is movable in the length direction of the stirring shaft by buoyancy received by the float in the liquid and liquid impact force received by the moving stirring vane.

6. The dissolved air tank according to claim 5, wherein the number of the floating bodies is plural, the floating bodies are provided on the upper surface of the movable stirring piece, the floating bodies are cylindrical, and a plurality of spaced blades are provided on the peripheral side of the floating bodies.

7. The dissolved air tank of claim 5, wherein a spring is sleeved on the connecting rod, the spring is positioned between the upper fixed stirring sheet and the upper movable stirring sheet, and two ends of the spring are respectively connected with the upper fixed stirring sheet and the upper movable stirring sheet.

8. A dissolved air tank according to claim 4 wherein projections for stirring water flow are provided on the upper and lower faces of the fixed stirring vane, said projections extending outwardly along a helical line away from the stirring shaft.

9. A dissolved air vessel according to any one of claims 1 to 3 wherein a lifting ring is provided on the vessel.

10. A dissolved air vessel according to any one of claims 1 to 3 wherein a manhole is also provided in the vessel.