KR102406985B1 - waste water neutralization treatment - Google Patents

Abstract

An object of the present invention is to provide an apparatus for neutralizing wastewater using carbon dioxide that can uniformly distribute properties and temperature by controlling the flow rate and movement distance of influent water in a tank.
Accordingly, in the present invention, in the wastewater neutralization treatment apparatus comprising a tank into which the influent is introduced and a stirrer for stirring the influent in the tank, it is mounted to accelerate the reaction by disturbing the flow of the influent in the tank, Disclosed is an apparatus for neutralizing wastewater using carbon dioxide, which further includes a plurality of stand pipes in which a plurality of air nozzles for receiving compressed air from an external air compressor and spraying the inflow water into the tank are arranged at regular intervals.

Description

Waste water neutralization treatment device using carbon dioxide

The present invention relates to a neutralization treatment apparatus in tunnel wastewater treatment, and more particularly, to a wastewater neutralization treatment apparatus using carbon dioxide that can make uniform properties and temperature distribution by controlling the flow rate and moving distance of influent water through the neutralization treatment apparatus is about

If you look at the wastewater generated during tunnel excavation at the construction site, it contains a large amount of cement, and the main components of the above-mentioned cement are lime, silica, alumina, iron oxide, etc. The main source of wastewater generated during construction is a large amount of lime in the form of fine particles.

Such tunnel wastewater has a strong alkalinity with a pH of 11 or more, and the concentration of suspended substances is also very high, requiring appropriate treatment. The method of neutralizing tunnel wastewater using ferrous chloride has a problem with limited use due to high risk.

In this way, wastewater generated at a construction site cannot be directly discharged into the nearby water system, and by operating a tunnel wastewater treatment system directly at each site, pollutants are reduced below the standard of effluent water quality under the Water Environment Conservation Act and discharged into public waters. have.

As a general process for treating excavation wastewater in the prior art, alkaline wastewater is neutralized, and a large amount of suspended matter is removed by gravity precipitation using chemicals or the like.

In the past, sulfuric acid was generally used to neutralize wastewater, but when a strong acid such as sulfuric acid is used, there has been a problem that equipment is corroded and there is a risk of handling. There was a problem in that it was necessary to secure a site for the wastewater treatment facility as much as the corresponding area.

On the other hand, the tunnel wastewater treatment system for the above-mentioned tunnel wastewater treatment includes a sedimentation and flow rate control tank that removes suspended substances from the tunnel wastewater and adjusts the flow rate to be constant, a neutralization reaction tank that adjusts the pH of pollutants by injecting a neutralizing agent, a polymer A coagulation tank that changes to floc by injecting chemicals such as polymer (coagulant), and influent water that has undergone neutralization and flocculation reaction is allowed to stand for a certain period of time to settle the aggregated particles (separation of sedimentation) It includes a settling tank that overflows and discharges the removed effluent (sedimentation treated water), and a dehydrator that collects the sediment (sludge) accumulated at the bottom of the settling tank with a drawing pump, concentrates it below a certain moisture content, and then discharges it.

In particular, since the reaction tank directly affects the water quality of the effluent, a structure that can make the properties of the influent and the hydrogen ion concentration (pH) uniform and a design that can safely withstand the head and agitation are required.

However, the conventional reaction tank has a structure in which liquid influent and a gaseous neutralizer are stirred. Therefore, due to the structural characteristics of installing an agitator in the tank to agitate the influent, the air supply is not smooth, and it sticks to the impeller of the agitator and sticks to it. There are problems that cause it.

In addition, there is a problem in that the flow and properties of the influent in the reaction tank are not sufficiently uniformed and flowed into the coagulation tank.

The background or prior art described herein is information possessed by the inventor or acquired in the process of deriving the present invention, and is only intended to help in understanding the technical meaning of the present invention, and prior to the filing of the present invention, the technology to which this invention belongs It does not mean that the technology is widely known in the field.

KR Patent Registration No. 10-0639266 Registration Date 2006.10.20 KR Patent Registration No. 10-1943451 Registration Date 2019.01.23 KR Patent Registration No. 10-0808289 Registration Date 2008.02.22 KR Patent Publication No. 10-2010-0122271 Publication Date 2010.11.22

Accordingly, the inventor of the present invention comprehensively considers all of the above and at the same time solves the technical limitations and problems of the reactor technology of the existing tunnel wastewater treatment system. A device that can neutralize and increase the reaction time of carbon dioxide and tunnel wastewater to increase the neutralization effect of tunnel wastewater, that is, it prevents agglomerates from sticking to the stirring blades of the stirrer, and also reduces the flow rate and movement distance of influent water. The present invention was created as a result of continuous research by making great efforts to develop a reaction tank of a strong alkaline wastewater neutralization treatment device of a new structure that can be controlled to make the properties and temperature distribution uniform.

Therefore, the technical problem and object to be solved by the present invention is to provide an apparatus for neutralizing wastewater using carbon dioxide that can uniformly shape and temperature distribution by controlling the flow rate and movement distance of influent water.

Another technical problem and object to be solved by the present invention is to provide an apparatus for neutralizing wastewater using carbon dioxide to prevent the agglomerates from adhering to the stirring blade portion of the stirrer.

That is, an object of the present invention is to provide a wastewater neutralization treatment device capable of rapidly treating strongly alkaline wastewater.

Here, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objectives mentioned above, and other technical problems and objects not mentioned above are based on common knowledge in the technical field to which the present invention belongs from the description below. Those who have it will be able to understand clearly.

Specific means according to the implementation of the present invention for effectively achieving a specific technical purpose while embodying a new idea for solving the technical problem of the present invention as described above is a tank into which the influent flows and agitating the influent in the tank. In the tunnel wastewater treatment apparatus comprising a reaction tank including a stirrer, it is mounted to advance the reaction by giving disturbance while causing the flow of influent water inside the tank, and receiving compressed air from an external air compressor in the inflow water in the tank Provided is a wastewater neutralization treatment apparatus characterized in that the air nozzles for spraying further include a plurality of stand pipes arranged at regular intervals.

Accordingly, the present invention can control the flow rate and movement distance of the influent to make the properties and temperature distribution uniform, and prevent the agglomerate from adhering to the stirring blade portion of the stirrer.

In addition, in a preferred embodiment of the present invention, a plurality of the stand pipes are arranged at regular intervals up and down in the tank, and the air nozzles have an annular shape at regular intervals along the circumference so that the angle can be adjusted by the angle adjusting means. By including a nozzle pipe arranged as a , and a plurality of supply pipes connected to the nozzle pipe to supply compressed air of the air compressor, the flow rate and movement distance of the inflow water in the tank can be more effectively controlled.

In addition, in a preferred embodiment of the present invention, the angle adjusting means is a connection hole drilled at regular intervals along the circumference of the nozzle tube, an air tube inserted into the inside of the nozzle tube, and rotatable around the outer circumference of the nozzle tube By comprising a ring-type clamp mounted to the clamp, an electric motor fixed to the clamp and rotating the air nozzle at a predetermined angle to adjust the spray angle, and a flexible tube connecting the air tube and the air nozzle through the connection hole. The influent can be induced to swirl along the inner wall of the tank, creating a vortex.

According to the technical idea and embodiment of the present invention, which is based on a unique solution to solve the above technical problem, compressed air is supplied from an external air compressor and injected into the tank through an air nozzle, so that the inflow water into the tank It is possible to speed up the reaction by giving disturbance while causing the flow of the influent, as well as to control the flow rate and movement distance of the influent to make the properties and temperature distribution uniform.

In addition, it is possible to prevent the agglomerate from adhering to the stirring blades of the stirrer.

In addition, by inducing the influent to vortex along the inner wall of the tank, the properties and temperature distribution can be adjusted more uniformly and quickly.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the description of the claims.

1 is a longitudinal cross-sectional view schematically showing a strong alkaline wastewater neutralization treatment apparatus according to an embodiment of the present invention.
2 is a perspective view schematically showing a stand pipe among the main elements constituting the reaction tank of the wastewater neutralization treatment apparatus using carbon dioxide according to an embodiment of the present invention.
3 is a partial cross-sectional view showing an enlarged local portion of a stand pipe among the main elements constituting the wastewater neutralization treatment apparatus using carbon dioxide according to an embodiment of the present invention.
4 is a partial cross-sectional view showing an enlarged local portion of a stand pipe among the main elements constituting a reaction tank in a wastewater neutralization treatment apparatus using carbon dioxide according to another embodiment of the present invention.

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to this, the terms described below are defined in consideration of the functions in the present invention, which indicate that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly or commonly recognized in the art.

In addition, when it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings may be illustrated by exaggerating or simplifying a part for the explanation of the configuration and operation of the technology and for convenience and clarity of understanding, and it is important that each component in the drawing exactly matches the actual size and shape reveal that it is not

In addition, in this specification, the term and/or is meant to include a combination of a plurality of related described items or any of a plurality of related described items, and when a part includes a certain component, it is a description that is specifically opposite This does not mean that other components are excluded, but other components can be further included.

That is, terms such as 'include' or 'have', 'have' as used in the present specification mean that a feature, number, step, operation, component, part, or combination thereof exists. However, it is to be understood that this does not exclude the possibility of addition or existence of one or more other features or number, step operation components, parts, or combinations thereof.

The meaning of the terms "unit" and "unit" used in the present invention means a module type that processes at least one function or a certain operation desired in the system or a module that plays a role, which is hardware, software, or hardware. And it may be implemented as a device or assembly capable of performing an independent operation or means through a combination of software or the like.

And terms such as upper, lower, upper, lower, upper, lower, upper, lower, front and rear, left and right are used for convenience to distinguish relative positions of each component. For example, the upper side in the drawing may be named or referred to as the upper side and the lower side as the lower side, the longitudinal direction may be named or referred to as the front-back direction, and the width direction may be named or referred to as the left/right direction.

Also, terms such as first, second, etc. may be used to describe various components. That is, terms such as 1st, 2nd, etc. may be used only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component without departing from the protection scope of the present invention, and the second component may also be referred to as a first component.

1 to 3, the reaction tank 100 of the wastewater neutralization treatment apparatus using carbon dioxide according to an embodiment of the present invention is provided with a tank 110 having a predetermined storage space so that the inflow water is introduced and stored.

And a stirrer 120 for agitating the inflow water in the tank 110 is installed in the upper central portion of the tank 110 .

That is, the agitator 120 is erected in the middle of the tank 110 and consists of a rotating shaft (drive shaft) that is rotated by driving a geared motor, and a plurality of agitating blades attached to the rotating shaft in a prefabricated manner.

In addition, a stand pipe 130 is mounted inside the tank 110 to speed up the reaction by giving disturbance while generating the flow of the influent, and to control the flow rate and movement distance of the influent.

That is, in the stand pipe 130 , a plurality of air nozzles 131 that receive high-pressure carbon dioxide from the external air compressor A and spray into the inflow water in the tank 110 are arranged at regular intervals.

At this time, carbon dioxide is mixed with the strongly alkaline liquid in the reaction tank 100 while forming a vortex.

In addition, the stand pipe 130 includes a plurality of nozzle pipes 132 and a supply pipe 133 .

In the nozzle tube 132 , the air nozzles 131 are arranged in an annular shape at regular intervals along the periphery, and a plurality of them are disposed in the tank 110 at regular intervals up and down.

That is, the air nozzle 131 is coupled along the circumference of the nozzle tube 132 so that the angle can be adjusted by the angle adjusting means so as to induce a vortex.

The supply pipe 133 is installed in a plurality in order to supply the compressed air of the air compressor (A) to each nozzle pipe 132 while connecting the plurality of nozzle pipes 132 arranged in the top and bottom.

Here, the air nozzle 131 may be coupled to the nozzle tube 132 so as to be arranged obliquely in either direction so that the inflow water may be induced to rotate around the inner wall of the tank 110 to generate a vortex.

That is, the air nozzle 131 may be disposed so that the inflow water forms a spiral vortex in the direction of the rotation center by centrifugal force and centripetal force action.

On the other hand, in FIG. 1, an inlet pipe for supplying influent water into the tank 110 and a discharge pipe for discharging the treated water to the outside of the tank 110 are not shown and omitted, but a conventional structure can be applied. is of course

The reactor 100 of the wastewater neutralization treatment apparatus using carbon dioxide according to the embodiment of the present invention configured as described above injects liquefied carbon dioxide gas and chemicals (neutralizing agent) such as alum into the tank 110 and operates the stirrer 120 By stirring at a constant speed, a neutralization reaction to primary agglomeration and pH adjustment of the contaminants can occur.

In this process, compressed air is supplied from the external air compressor (A) and sprayed into the tank 110 through the air nozzle 131 that can adjust the angle with respect to the stand pipe 130 to control the flow of the influent water in the tank 110 . By causing disturbance, the reaction can be accelerated, and the flow rate and movement distance of the influent can be controlled.

That is, since the influent does not descend vertically and flows round and round at a constant flow rate, it is possible to greatly improve the treatment performance of the reaction tank 100 by making the properties and temperature distribution uniform, as well as the agglomerates adhering to the stirring blades of the stirrer 120 This phenomenon can be prevented with certainty.

In addition, since no load is applied to the drive shaft (rotation shaft) of the stirrer 120 , the stirring blades can rotate smoothly.

Meanwhile, as shown in FIG. 4 , the air nozzle 131 of the stand pipe 130 among the main elements constituting the reaction tank of the wastewater neutralization treatment apparatus using carbon dioxide according to another embodiment of the present invention is a nozzle by an angle adjusting means. It is mounted so that the angle can be adjusted with respect to the tube (132).

That is, the connection holes 134 are drilled at regular intervals along the circumference of the nozzle tube 132 , and the air tube 135 is inserted into the nozzle tube 132 .

And on the outer circumference of the nozzle tube 132, a ring-shaped clamp 136 is rotatably mounted at a predetermined angle by an external force.

In addition, an electric motor 137 for adjusting the injection angle by rotating the air nozzle 131 at a predetermined angle is fixed to the clamp 136 .

And the air tube 135 and the air nozzle 131 are connected through a flexible tube 138 to move flexibly.

That is, one end of the flexible tube 138 passes through the connection hole 134 and is coupled to the air tube 135 , and the other end is coupled to the air nozzle 131 .

Here, the electric motor 137 converts electrical energy into mechanical energy like a motor drive to obtain rotational power, and it is easy to start (drive) and operate by signal current from the control unit, and it is easy to select a model suitable for the load, noise and A method of driving the machine using an ordinary electric motor (electric motor) with low vibration and no exhaust pollution can be adopted.

For example, a motor drive using an induction motor operating with a rotational force generated by an interaction between a rotating magnetic field generated by an alternating current flowing in the stator winding and an induced current generated in the rotor unit may be employed.

In addition, the motor 137 converts a voltage input according to a control signal of the control unit into a rotation angle to quickly stop and reverse a servo motor, a stepping motor rotating by a certain angle, or a force required for driving by reducing the rotation speed of the motor It is possible to employ a geared motor including a speed reducer that adjusts to output.

Among the main elements constituting the reaction tank of the wastewater neutralization treatment apparatus using carbon dioxide according to another embodiment of the present invention configured as described above, the stand pipe 130 has the clamp 136 rotated at a predetermined angle around the nozzle pipe 132 . The vertical angle of the air nozzle 131 is adjusted, and the horizontal angle of the air nozzle 131 is adjusted by the rotational driving of the electric motor 137, so that the air nozzle 131 is inclined in either direction. You can spray air.

Therefore, the influent can be operated to rotate around the inner wall of the tank 110 to generate a vortex, so that the influent flow in the tank 110 is more effectively caused and disturbed to accelerate the reaction, as well as the flow rate of the influent required for mixing the neutralizer and travel distance can be adjusted.

In addition, it is possible to reliably prevent the agglomerates from adhering to the stirring blades of the stirrer 120 .

In addition, it is possible to induce the influent to cause a vortex along the inner wall of the tank 110, so that the properties and temperature distribution can be more uniformly and quickly adjusted.

Here, among the components related to the reaction tank of the wastewater neutralization treatment apparatus using carbon dioxide according to another embodiment of the present invention, the same reference numerals are used for components having the same or similar effects as those of the above-described embodiment, and repetitive and specific reference numerals are used therefor. A description is omitted.

On the other hand, the present invention is not limited by the above-described embodiment and the accompanying drawings, and can be variously modified and applied in various ways not illustrated within the scope without departing from the technical spirit of the present invention, as well as each It is clear to those of ordinary skill in the art to which the present invention pertains that it can be widely applied by changing the component substitution and other equivalent embodiments.

Therefore, the contents related to the modification and application of the technical features of the present invention should be interpreted as being included within the technical spirit and scope of the present invention.

100: reactor 110: tank
120: agitator 130: stand pipe
131: air nozzle 132: nozzle pipe
133: supply pipe 134: connection hole
135: air pipe 136: clamp
137: electric motor 138: flexible tube

Claims (4)

In the neutralization treatment apparatus comprising a tank (110) into which the influent water flows, and a reactor (100) including a stirrer (120) for stirring the inflow water in the tank (110),
An air nozzle ( 131) includes a plurality of stand pipes 130 arranged at regular intervals;
A plurality of the stand pipes 130 are arranged at regular intervals up and down in the tank 110, and the air nozzles 131 are arranged at regular intervals along the circumference so that the angle can be adjusted by the angle adjusting means. Annular nozzle tube 132; and a plurality of supply pipes 133 connected to the nozzle pipe 132 to supply the compressed air of the air compressor (A);
The angle adjusting means includes a connection hole 134 drilled at regular intervals along the circumference of the nozzle tube 132; an air pipe 135 inserted into the nozzle pipe 132; a ring-shaped clamp 136 rotatably mounted on the outer periphery of the nozzle tube 132; an electric motor 137 fixed to the clamp 136 and rotating the air nozzle 131 at a predetermined angle to adjust the spray angle; and a flexible tube (138) connecting the air pipe (135) and the air nozzle (131) through the connection hole (134).
delete delete The method of claim 1,
Wastewater neutralization treatment apparatus using carbon dioxide, characterized in that the inflow water in the tank 110 contains carbon dioxide.

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