CN219907216U - Adjustable efficient gas stripping reflux device - Google Patents

Abstract

The utility model provides an adjustable high-efficiency stripping reflux device, which comprises: the air pipe and the mixed liquid pipe, one end of the air pipe is an air inlet end, the other end of the air pipe is an air outlet end, the air pipe further comprises a signal controller, the air inlet end is sequentially provided with an electric regulating valve and a flowmeter, the electric regulating valve and the flowmeter are respectively and electrically connected with the signal controller, the bottom end of the mixed liquid pipe is vertical, the bottom end of the mixed liquid pipe is provided with a horn mouth, and the air outlet end penetrates through the horn mouth to extend into the mixed liquid pipe and is connected with a micropore releaser. The microporous releaser is arranged in the mixed liquid pipe, so that dense micro bubbles can be formed, gas and water are uniformly mixed, pulse water outlet and stable outflow are eliminated, the air demand is reduced, and the energy consumption is reduced; through installing flowmeter and electric control valve additional at the inlet end of air tube, can accurate control air output to through signal controller control mud or mixed liquid reflux ratio, can reduce the working costs moreover, improve gas stripping efficiency.

Description

Adjustable efficient gas stripping reflux device

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to an adjustable efficient stripping reflux device.

Background

At present, the traditional activated sludge method in the sewage treatment process is still a mainstream process, and most processes need sludge or mixed liquor to flow back or both to flow back simultaneously in order to ensure the amount of activated sludge or achieve the effect of denitrification and dephosphorization. The method for refluxing is divided into three main methods according to refluxing power equipment: pump lift, impeller agitation lift, and air lift (i.e., stripping). In a medium-and large-sized sewage treatment plant, because of more equipment, more process structures and professional operation teams, a pump lifting and impeller stirring lifting method is used as a reflux means of an activated sludge method, so that the method is a method with higher cost performance. In small sewage treatment plants, the operation is simpler and better because of the small scale and the required operation equipment, so that the small scale sewage treatment plant is generally designed into an intensive treatment device or a built structure. The gas stripping method has the characteristics of less equipment, low manufacturing cost, convenient maintenance and management, low operation energy consumption and the like, and is a reflux method which is more and more commonly accepted by the current small sewage treatment plants.

The air stripping method is that air is directly connected to the lower part of the mud-water mixing pipe, because air and mud cannot be completely mixed in the pipe, the efficiency of larger bubbles in the air stripping process is low, and pulse water outlet and water outlet are unstable and the reflux quantity cannot be controlled, so that improvement is needed urgently.

Disclosure of Invention

In order to solve the problems that air and muddy water in the prior art cannot be completely mixed in a pipe, the efficiency of larger bubbles is low in the air stripping process, pulse water outlet is unstable, the water outlet quantity cannot be controlled, and the like, the utility model provides an adjustable efficient air stripping reflux device.

The technical scheme of the utility model is realized as follows:

an adjustable high efficiency stripper reflux unit comprising: the air pipe and the mixed liquid pipe, one end of the air pipe is an air inlet end, the other end of the air pipe is an air outlet end, the air pipe further comprises a signal controller, the air inlet end is sequentially provided with an electric regulating valve and a flowmeter, the electric regulating valve and the flowmeter are respectively and electrically connected with the signal controller, the bottom end of the mixed liquid pipe is vertical, the bottom end of the mixed liquid pipe is provided with a horn mouth, and the air outlet end penetrates through the horn mouth to extend into the mixed liquid pipe and is connected with a micropore releaser.

Preferably, the micropore releaser is provided with micropores with the pore diameter of 0.5-2 mm.

Further preferably, the bottom end is submerged, and the submerged depth is h ₁ The sum of the submerging depth and the lifting height is h ₂ ，h ₁ /h ₂ ≥0.5。

Compared with the prior art, the micro-pore releaser is arranged in the mixed liquid pipe, so that compact micro-bubbles are formed, gas and water are uniformly mixed, pulse water outlet is eliminated, outflow is stabilized, air demand is reduced, and energy consumption is reduced; the flow meter and the electric regulating valve are additionally arranged at the air inlet end of the air pipe, so that the air outlet quantity can be accurately controlled, and the reflux ratio of the sludge or the mixed liquid is controlled by the signal controller; the technical characteristics cooperate to solve the problems of unstable water outlet and incapability of controlling reflux quantity in the prior art, reduce the operation cost and improve the stripping efficiency.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

1. An air tube; 2. an electric control valve; 3. a flow meter; 4. a microporous releaser; 5. a horn mouth; 6. a mixed liquid pipe; 7. and a signal controller.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1: an adjustable high efficiency stripper reflux unit comprising: the air pipe 1, the mixed liquid pipe 6 and the signal controller 7, one end of the air pipe 1 is an air inlet end, the other end is an air outlet end, the air inlet end is sequentially provided with an electric regulating valve 2 and a flowmeter 3, the electric regulating valve 2 and the flowmeter 3 are respectively and electrically connected with the signal controller 7, the bottom end of the mixed liquid pipe 6 is vertical, the bottom end is provided with a horn mouth 5 which is convenient for mixed liquid to enter, the bottom of the horn mouth 5 is wide, the top is narrow, and the air outlet end penetrates through the horn mouth 5 to extend into the mixed liquid pipe 6 and is connected with a micropore releaser 4.

Working principle: the compressed air is regulated in size by the electric regulating valve 2, is metered by the flowmeter 3, enters the mixed liquid pipe 6 from the air pipe 1 by the microporous releaser 4, and the muddy water enters the mixed liquid pipe 6 through the horn mouth 5 and is mixed with the air in the mixed liquid pipe 6 to be lifted to a subsequent processing unit. In the process, the signal of the flowmeter 3 is transmitted into the signal controller 7, the signal controller 7 calculates the corresponding reflux quantity through henry's law, and feeds back signals to the electric regulating valve 2 to regulate the opening degree according to the required reflux quantity, so that the aim of accurately controlling the reflux quantity is finally achieved.

Stripping is a physical process whose principle is to decrease the partial pressure of one phase by increasing it, according to henry's law. The principle formula is ρ ₁ h ₁ ＝ρ ₂ h ₂ +1/2ρ ₂ v ₂ ² +Σh _f (ρ ₁ Is the density of the muddy water, h ₁ For the submerged depth ρ of the mixed liquor pipe ₂ Is the density of the gas-mud water mixed solution, h ₂ 1/2 ρ for the sum of the submerging depth and the lifting height ₂ v ₂ ² Sigma h is the kinetic energy of gas-mud mixture liquid _f Loss of resistance to the pipe), wherein the air density is negligible relative to the mud density, thus ρ _2＝ Q _{Water and its preparation method} ρ ₁ /(Q _{Water and its preparation method} +Q _{Air flow} )(Q _{Water and its preparation method} Is the return flow of muddy water, Q _{Air flow} Air stripping air demand), the minimum air demand Q can be calculated according to the two types _{Air flow} . Under the condition that the mixed liquor air inlet is not provided with any adjusting measures, the improved efficiency coefficient is generally 0.35-0.45 because the gas and the mud cannot be completely mixed; after the microporous releaser is arranged, the utility model has good gas-water mixing effect, compact bubbles and efficiency coefficient which can be improved to more than 0.7, is beneficial to saving air consumption, improves gas stripping efficiency and can reduce energy consumption.

As a preferable technical scheme, in the utility model, the micropore releaser 4 is provided with micropores with the aperture of 0.5-2mm, and dense micro bubbles with the aperture of 0.5-2mm can be formed after air passes through the micropore releaser 4, so that the uniform mixing of air and water is facilitated, the pulse water outlet is eliminated, the outflow is stabilized, and the air efficiency is improved.

As a preferred technical proposal, in another embodiment of the utility model, air enters from the bottom end of the mixed liquor pipe 6, the bottom end of the mixed liquor pipe 6 is submerged, and the mixed liquor pipe 6 needs to have a certain submerged depth h in water ₁ The sum of the submerging depth and the lifting height is h ₂ ，h ₁ /h ₂ ≥0.5。

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model, and the components and the connection manners thereof not described in detail in the present utility model are all prior art; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model. The components or connections not specifically described in the present utility model are all of the prior art.

Claims (3)

1. An adjustable high efficiency stripper reflux unit comprising: the air pipe (1) and mixed liquid pipe (6), the one end of air pipe (1) is the inlet end, the other end is the end of giving vent to anger, its characterized in that: still include signal controller (7), the inlet end is provided with electric control valve (2) and flowmeter (3) in succession, and electric control valve (2) and flowmeter (3) are connected with signal controller (7) electricity respectively, and the bottom of mixing liquid pipe (6) is perpendicular, the bottom is provided with horn mouth (5), the end of giving vent to anger stretches into in mixing liquid pipe (6) and is connected with micropore releaser (4) through horn mouth (5).

2. The adjustable high efficiency stripper reflux apparatus of claim 1, wherein: the micropore releaser (4) is provided with micropores with the aperture of 0.5-2 mm.

3. An adjustable high efficiency stripper reflux apparatus according to claim 1 or 2, wherein: the bottom end of the mixed liquid pipe (6) is submerged, and the submerged depth is h ₁ The sum of the submerging depth and the lifting height is h ₂ ，h ₁ /h ₂ ≥0.5。