KR20220022938A - Water quality improvement system and control method of water quality improvement system - Google Patents

Abstract

A water quality improving system and a method for controlling a water quality improving system according to the present invention relate to technology for directly converting wind energy into pneumatic energy without converting the wind energy into electrical energy and aerating the same in water. Since wind power is converted into kinetic energy of a blade (107) and is converted into the pneumatic energy through an air pump (105) to be aerated in the water, there is no need to separately have a generator for generating electricity and a motor for generating rotational force according to background art. Therefore, the present invention is easily installed and reduces installation costs compared to the background art. In addition, since a simple structure is possible compared to the background art equipped with the generator and the motor, maintenance is simple and failure frequency is reduced. In addition, since the present invention directly and rapidly converts the wind energy into the pneumatic energy, the present invention immediately aerates the wind power when the wind power is generated. That is, rapid driving is facilitated compared to aerating after charging the wind power in a battery for a long time like the background art. In addition, since the present invention is controlled to maintain rated rotation of the air pump and rated pressure inside the system by a controlling unit, a cycle life of the present invention is extended and failure is prevented. In addition, when a screen of an aeration device is damaged by the pneumatic pressure, the aeration device can be raised to a surface by buoyancy of an air tank. Therefore, since a worker can visually check an abnormal condition of a screen, and rapidly and easily repair the abnormal condition, the worker can repair the aeration device without diving.

Description

Water quality improvement system and control method of water quality improvement system

The present invention relates to 'a water quality improvement system and a control method of a water quality improvement system', and more specifically, because wind power is converted into pneumatic pressure instead of converted into electricity to supply air into the water, water quality can be improved only with wind power without electrical energy. It relates to a 'water quality improvement system and a control method for a water quality improvement system', characterized in that it was invented so that operating costs are not required.

In general, sewage treatment plants, aquaculture farms, ponds, reservoirs, lakes, and rivers with a slow flow rate do not flow smoothly, so organic matter and nutrients flow in, resulting in eutrophication, which increases nutrients in the water. When such eutrophication occurs, the amount of producer organisms that perform photosynthesis increases rapidly, resulting in green algae and red algae.

The green algae and red algae are a phenomenon in which floating algae proliferate in large quantities in eutrophic water and accumulate on the water surface to change the water color to green and red, respectively. These green and red algae are a kind of algal bloom. Eutrophication is caused by the accumulation of substances that will be nutrients for the reproduction of plankton, such as carbon, nitrogen (N) and phosphorus (P) in water. These substances are mainly contained in factory wastewater or domestic sewage, and proceed at a faster rate in stagnant water like a pond.

Algae greatly reproduced by the green algae and red algae consume a lot of oxygen while rotting and consequently reduce the dissolved oxygen amount (DO) of water, which is a major cause of threatening aquatic life.

Accordingly, the technology to improve water quality by lowering the biochemical oxygen demand (BOD) by continuously supplying oxygen to water has recently been in the spotlight. It has been suggested in the literature.

Looking at the configuration of the prior art, a wind power generator for generating electricity is configured because the blades are rotated by wind power, a motor rotating by receiving power from the wind generator, and an air pump connected to the motor to generate pneumatic pressure are configured do. In addition, a pipe that is connected to the water from the air pump and serves as a passage for air supplied pneumatically is configured, and an aeration device that is connected to the pipe to generate bubbles in water is configured. In the aeration device, a screen having a plurality of through holes in the casing opened to one side is closed on the open side, and the air concentrated in the casing becomes bubbles while passing through the through holes.

However, such a water quality improvement device has the following problems.

Since it is driven by electric power, a generator and a motor are required, which increases the installation cost, and there is a hassle of maintaining the generator and the motor.

In addition, there is a problem in that it is impossible to rapidly generate pneumatic pressure due to a process of generating pneumatic energy with the electric energy after converting wind energy into electric energy. If the wind energy is converted directly into pneumatic energy and the bubbles are supplied to the water, it would be efficient, but in the prior art, it takes time to convert the wind energy into electrical energy and charge the storage battery. There is no problem.

In addition, since the screen of the aerator is exposed to pneumatic pressure for a long time, it is easy to be dispatched. However, if it is damaged, a worker has to submerge to replace the screen or raise the aerator to the surface of the water and then replace it. There was a problem that it is difficult to repair.

Korean Patent Registration No. 10-1168372 (July 18, 2012)

The problems to be solved through the 'water quality improvement system and the control method of the water quality improvement system' according to the present invention are as follows.

First, since it is driven by electric power, a generator and a motor are required, which increases the installation cost and solves the inconvenience of maintaining the generator and the motor.

Second, an attempt is made to solve the problem that pneumatic pressure cannot be rapidly generated due to the process of converting wind energy into electrical energy and then generating pneumatic energy with electrical energy. If the wind energy is converted directly into pneumatic energy and the bubbles are supplied to the water, it would be efficient, but in the prior art, it takes time to convert the wind energy into electrical energy and charge the storage battery. We want to solve problems that do not exist.

Third, when the screen of the aeration device is damaged, it is intended to solve the problem of difficult repair, such as the operator having to submerge to replace the screen or to replace the screen after lifting the aeration device to the surface of the water.

The water quality improvement system according to the present invention is configured as follows to solve the above problems.

A tower having a supporting function, an air pump mounted on the upper end of the tower, a blade having a main shaft connected to rotate to the air pump and having a pitch angle adjusted, an exhaust pipe connected to the air pump and extending to the water; An aeration device connected to the end of the exhaust pipe to be submerged in water, a flow meter connected to the exhaust pipe to sense a flow rate of exhausted air, and a pressure gauge connected to the exhaust pipe to sense the pneumatic pressure of exhausted air; A control valve that is connected and opened and closed by an electric signal, an accumulator connected to the control valve, receives data values from the velocity gauge and a pressure gauge, sends an electric signal to the control valve, opens and closes, and controls the pitch angle of the blade includes a control unit.

The aeration device is

A casing open to one side as air is concentrated, a screen closed on the open side of the casing and having a plurality of through holes for generating air bubbles while passing air, an air tank mounted on the upper portion of the casing, and the It is connected to the exhaust pipe and the air tank and includes a control valve in which the flow path is changed by the control unit.

In addition, when a data value greater than the rated flow rate is received from the flow meter, the control unit controls the pitch angle to be a normal flow rate, and when a data value greater than the rated pressure is received from the pressure gauge, the control valve is opened to the accumulator. Controls so that the normal pressure is maintained by storing air, and when a data value greater than the stop pressure is received from the pressure gauge, the pitch angle is adjusted to stop the rotation of the blade, and the flow speed of the flow meter is greater than or equal to the prescribed flow speed and the pressure is prescribed If the pressure is below the pressure, the control valve is driven to block the flow path connected to the casing, and the flow path is opened to the air tank to allow air to flow in.

In addition, the control method of the water quality improvement system consists of the following processors in order to solve the above problems.

Since the blade is rotated by the wind power, the air pump is operated to pressurize air to the exhaust pipe, and thereby a driving step of generating air bubbles in the aeration device is performed,

After the driving step, the control unit receives the data value from the velocimeter, so that the pitch value of the blade is maintained at the rated flow rate, and if it is less than the rated flow rate, the pitch value is adjusted to increase the rotation speed of the blade, and , If it is greater than the rated flow rate, the pitch value is adjusted to reduce the number of revolutions, and then the flow rate sensing step of repeating the above step of receiving the data value from the velocity meter and comparing it with the rated flow rate;

After the driving step, the control unit receives the data value from the pressure gauge, closes the control valve when the rated pressure is less than the rated pressure, and opens the control valve when the pressure is smaller than the stop pressure when the rated pressure is greater than the rated pressure to open the accumulator. A pressure sensing step of storing air in the air and, if it is greater than the stopping pressure, adjusting the pitch value to stop the rotation of the blade and stopping all processes, then repeating the driving step and starting all processes;

After the driving step, the control unit receives the data value from the pressure gauge, opens the control valve if the pressure is less than the minimum pressure, supplies air, and repeats the process of comparing the data value with the minimum pressure again, and a pressure supplementing step of closing the control valve when the data value is greater than the minimum pressure.

After the driving step, when the flow rate of the flow meter is greater than or equal to the prescribed flow rate and the pressure is less than or equal to the prescribed pressure, the control unit operates the control valve to block the flow path connected to the casing and open the flow path to the air tank to allow air to flow in It includes an aeration anomaly detection step.

The water quality improvement system and the control method of the water quality improvement system according to the present invention can exhibit the following effects by the above solution.

First, since wind power is converted into kinetic energy of the blade and then converted into pneumatic energy through the air pump and aerated in water, a generator that generates electricity and a motor that generates rotational force are separately provided as in the background art no need. Accordingly, there is an advantage that the installation is easy and the installation cost can be reduced compared to the background art. In addition, since a simple structure is possible compared to the background technology in which a generator and a motor are mounted, maintenance is simple and the frequency of failures can be reduced.

Second, since the present invention can rapidly convert wind energy directly into pneumatic energy, there is an effect that aeration can be performed immediately when wind power is generated. In other words, as in the background art, the battery can be driven quickly compared to the battery that can be aerated after being charged for a long time.

Third, since the present invention can be controlled so that the rated rotation of the air pump and the rated pressure inside the system are maintained by the controller, the life of the present invention can be extended and failure can be prevented.

Fourth, when the screen of the aeration device is damaged by pneumatic pressure, the aeration device can be floated above the water surface by the buoyancy of the air tank. Therefore, since the operator can visually check the abnormal state of the screen and repair it quickly and easily, there is an effect that the operator can repair the aeration device without submerging.

1 is a schematic diagram showing a water quality improvement system according to the present invention.
Figure 2 is a block diagram showing a water quality improvement system according to the present invention.
3 is a cross-sectional view showing an aeration device configured in the water quality improvement system according to the present invention.
4 is a cross-sectional view showing a state in which air is injected into the air tank of the aeration device configured in the water quality improvement system according to the present invention;
5 is a flowchart showing a control method of the water quality improvement system according to the present invention.

Hereinafter, various embodiments of the present document will be described with reference to the accompanying drawings. However, this is not intended to limit the technology described in this document to specific embodiments, and it should be understood that the present document includes various modifications, equivalents, and/or alternatives of the embodiments of the present document. In connection with the description of the drawings, like reference numerals may be used for like components.

In addition, expressions such as "first," "second," used in this document may modify various elements regardless of order and/or importance, and in order to distinguish one element from another element, It is used only and does not limit the corresponding components. For example, 'first part' and 'second part' may represent different parts regardless of order or importance. For example, without departing from the scope of the rights described in this document, a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.

In addition, terms used in this document are used only to describe specific embodiments, and may not be intended to limit the scope of other embodiments. The singular expression may include the plural expression unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meanings as commonly understood by one of ordinary skill in the art described in this document. Among terms used in this document, terms defined in a general dictionary may be interpreted with the same or similar meaning as the meaning in the context of the related art, and unless explicitly defined in this document, ideal or excessively formal meanings is not interpreted as In some cases, even terms defined in this document cannot be construed to exclude embodiments of the present document.

Hereinafter, the present invention for solving the above problems in conjunction with the accompanying drawings, the water quality improvement system 100 is configured as follows.

1 is a schematic diagram showing a water quality improvement system according to the present invention, Figure 2 is a block diagram showing a water quality improvement system according to the present invention. In addition, FIG. 3 is a cross-sectional view showing the aeration device configured in the water quality improvement system according to the present invention, and FIG. 4 shows a state in which air is being injected into the air tank of the aeration device configured in the water quality improvement system according to the present invention. It is one cross section.

A tower 101 having a supporting function is configured, and an air pump 105 mounted to rotate on the top of the tower 101 is configured, and accommodated in the housing 103 mounted on the top of the tower 101 . is made up of In addition, the main shaft is connected to the air pump 105 to rotate and the blade 107 having a pitch angle adjusted is configured, and power is transmitted to the air pump 105 while being rotatably supported by the housing 103 . is configured to This configuration can be fully understood as a configuration in which the generator is replaced with the air pump 105 in the configuration of a general wind power generator. In addition, the blade 107 can adjust the magnitude of the resistance to wind power by adjusting the pitch angle by itself. That is, when the pitch angle is adjusted to receive a lot of wind, the rotation speed is increased, and when the pitch angle is adjusted to receive less wind, the rotation speed is slow. Since these matters are known to any person skilled in the art, detailed descriptions thereof will be omitted.

In addition, an exhaust pipe 111 that is connected to the air pump 105 and extends to the water is configured, and an aeration device 125 that is connected to the end of the exhaust pipe 111 and is submerged in water is configured.

In addition, the flow rate meter 133 is configured to be connected to the exhaust pipe 111 to sense the flow rate of the exhausted air. The flow rate of air is sensed through the flow meter 133 , and since the flow rate is proportional to the rotation speed of the air pump 105 , the rated rotation speed of the air pump 105 can be detected. Accordingly, it is possible to prevent in advance a phenomenon in which the air pump 105 increases the rated speed to shorten the lifespan and cause a failure.

In addition, the pressure gauge 145 for sensing the pneumatic pressure of the exhaust air is connected to the exhaust pipe 111 is configured. Via the pressure gauge 145, the exhaust pipe 111 and the aeration device 125 can sense an energetic pressure that can be endured.

In addition, a control valve 157 connected to the exhaust pipe 111 to be opened and closed by an electric signal is configured, and a pressure accumulator 163 connected to the control valve 157 and filled with air is configured. In addition, the exhaust valve 171 is configured to be connected to the control valve 157 to bypass the residual air that increases the air pressure when the air filling in the accumulator 163 is completed. The exhaust valve 171 is configured to automatically exhaust by sensing the maximum pressure inside the accumulator 163 while being connected to the control valve 157 .

In addition, a control unit 185 for receiving data values from the velocity gauge 133 and the pressure gauge 145 and sending an electrical signal to the control valve 157 to open and close and control the pitch angle of the blade 107 is configured. .

Looking at the configuration of the aeration device 125, a casing 127 that is opened to one side as air is concentrated is configured. And the screen 122, which is finished on the open side of the casing 127, is formed with a plurality of holes through which air bubbles are generated while passing through it. For example, a large number of fine holes are formed in a plate material such as stone or wood. There is, in general, it is preferable to use the same material as the air stone used in the water tank. As such, it is possible to effectively prevent eutrophication by improving the solubility of coral in water by forming fine air bubbles through the screen 122 .

In addition, the air tank 129 is mounted on the upper part of the casing 127, and is connected to the exhaust pipe 111 and the air tank 129, and the control valve 124 in which the flow path is changed by the control unit 185. is composed A check valve 126 is interposed between the air tank 129 and the control valve 124 so that the introduced air is not exhausted.

In addition, the exhaust pipe 111 is preferably a hose made of a flexible material. Accordingly, when the aeration device 125 floats to the surface by the buoyancy of the air tank 129, the exhaust pipe 111 is configured to move easily along it.

When a data value greater than the rated flow rate is received from the flow meter 133, the control unit 185 controls the pitch angle to become a normal flow speed, so that the rotation speed of the air pump 105 becomes the rated speed, thereby shortening the lifespan and failure can be prevented. The rated flow rate corresponds to the rated speed of the air pump 105 and serves as an index enabling the air pump 105 to rotate in an optimal state without failure.

In addition, when a data value greater than the rated pressure is received from the pressure gauge 145, the control valve 157 is opened to store air in the accumulator 163, so that the normal pressure is maintained, and the pressure gauge 145 When a data value greater than the stop pressure is received from the system, since the rotation of the blade 107 is stopped by adjusting the pitch angle, the system is programmed to shorten the life of the system due to excessive pressure and to prevent failure. The rated pressure refers to an optimal pressure that the system can withstand, and the stop pressure is a limit pressure that the system can withstand and is an index indicating when to stop driving.

In addition, the control unit 185 operates the control valve 124 to block the flow path connected to the casing 127 when the flow rate of the flow rate meter 133 is greater than or equal to the prescribed flow rate and the pressure is less than or equal to the prescribed pressure, and the air tank 129 ) to open the flow path and allow air to flow in. That is, when the flow velocity is a normal flow velocity as a specified flow velocity, but the pressure is an abnormally small pressure below the specified pressure, it can be seen that the screen 122 is damaged and no air pressure is formed. Accordingly, the control unit 185 determines that the screen 122 is damaged and allows air to be injected into the air tank 129 through the control valve 124 . Then, by the buoyancy of the air tank 129, the width device 125 floats above the water surface. Accordingly, the operator can visually check the abnormal state of the screen 122 and repair it quickly and easily. After repair, the aeration device 125 is submerged into water by its own weight by evacuating the air from the air tank 129 . As such, there is an advantage that the operator can repair the aeration device 125 without submerging.

Next, a control method of the water quality improvement system 100 will be described as follows.

Since the blade 107 is rotated by the wind power, the air pump 105 is operated to pump air into the exhaust pipe 111, thereby generating bubbles in the aerator 125. A driving step (S) ) is done At this time, the pitch angle of the blades 107 may be made to maximize the resistance to wind, or may be made to be less than that. When the air pump 105 is set only to rotate by receiving the resistance of the wind, the pitch value may be automatically reset through the flow velocity sensing step (T) thereafter.

After the driving step (S), the control unit 185 receives the data value from the velocity meter 133, so that the pitch value of the blade 107 is maintained at the rated flow rate, and the pitch is smaller than the rated flow rate. Adjust the value so that the rotation speed of the blade 107 is increased. And if it is greater than the rated flow rate, the pitch value is adjusted to reduce the number of rotations, and then the flow rate sensing step (T) of repeating the above step of receiving the data value from the anemometer 133 and comparing it with the rated flow rate is performed. In this way, since the rated flow rate is maintained, the rated rotation speed of the air pump 105 is maintained, thereby prolonging the life of the air pump 105 and preventing failure.

In addition, after the driving step (S), the control unit 185 receives the data value from the pressure gauge 145 and closes the control valve 157 when the rated pressure is less than the rated pressure, and when the rated pressure is greater than the rated pressure, the stop pressure If it is smaller than , the control valve 157 is opened to store air in the accumulator 163 . At this time, when a pressure greater than the rated pressure is sensed even in a state in which the air filling in the accumulator 163 is completed, the control valve 157 blocks the inlet of the accumulator 163 and maintains an open state while the exhaust valve 171 ) so that the air is bypassed and the pressure is lower than the rated pressure. And when the pressure of the pressure gauge 145 is greater than the stop pressure, the pitch value is adjusted to stop the rotation of the blade 107 and stop all processes, then repeat the driving step (S) and start all processes A detection step (U) is performed.

In addition, after the driving step (S), the control unit 185 receives the data value from the pressure gauge 145 and opens the control valve 157 when the pressure is less than the minimum pressure to supply air to the aeration device ( 125) so that air can be sprayed. The minimum pressure refers to a pressure in which air bubbles cannot be sprayed by the aeration device 125 . Then, the process of comparing the data value with the minimum pressure is repeated again, and when the data value is greater than the minimum pressure, a pressure supplementing step (W) of closing the control valve 157 again is performed.

In addition, after the driving step (S), the control unit 185 drives the control valve 124 if the flow rate of the flow rate meter 133 is greater than or equal to the specified flow rate and the pressure is less than or equal to the specified pressure to the casing 127. The aeration abnormality detection step (K) of blocking the connected flow path and opening the flow path to the air tank 129 to allow air to flow is performed.

According to the present invention as described above, since wind power is converted into kinetic energy of the blade 107 and then converted into pneumatic energy through the air pump 105 and aerated in water, a generator generating electricity as in the background art and There is no need to separately provide a motor for generating rotational force. Accordingly, there is an advantage that the installation is easy and the installation cost can be reduced compared to the background art. In addition, since a simple structure is possible compared to the background technology in which a generator and a motor are mounted, there is an advantage in that maintenance is simple and the frequency of failures can be reduced.

In addition, since the present invention can rapidly convert wind energy directly into pneumatic energy, there is an advantage that aeration can be performed immediately when wind power is generated. In other words, as in the background art, the battery can be driven quickly compared to the battery that can be aerated after being charged for a long time.

In addition, since the present invention can be controlled so that the rated rotation of the air pump and the rated pressure inside the system are maintained by the controller, the life of the present invention can be extended and failure can be prevented.

In addition, when the screen 122 of the aeration device 125 is damaged by the pneumatic force, the aeration device can be floated above the water surface by the buoyancy of the air tank. Therefore, since the operator can visually check the abnormal state of the screen and repair it quickly and easily, the operator can repair the aeration device without submerging.

100: water quality improvement system 101: tower
103: housing 105: air pump
107: blade 111: exhaust pipe
125: aerator 133: flow meter
145: pressure gauge 157: control valve
163: accumulator 171: exhaust valve
185: control unit S: driving stage
T: Flow rate sensing stage U: Pressure sensing stage
W: pressure replenishment stage

Claims (2)

A tower 101 serving as a supporting function, and
an air pump 105 mounted on the upper end of the tower 101;
A blade 107 having a main shaft connected to the air pump 105 to rotate and having a pitch angle adjusted;
An exhaust pipe 111 connected to the air pump 105 and extending to the water;
an aeration device 125 connected to the end of the exhaust pipe 111 and submerged in water;
a flow meter 133 connected to the exhaust pipe 111 to sense the flow rate of the exhausted air;
a pressure gauge 145 connected to the exhaust pipe 111 to sense the pneumatic pressure of the exhausted air;
a control valve 157 connected to the exhaust pipe 111 and opened and closed by an electric signal;
an accumulator (163) connected to the control valve (157);
and a control unit 185 for receiving data values from the velocity gauge 133 and the pressure gauge 145, sending an electric signal to the control valve 157, opening and closing, and controlling the pitch angle of the blade 107,
The aeration device 125,
The casing 127 opened to one side as the air is concentrated, and
A screen 122 that is closed on the open side of the casing 127 and has a plurality of through holes to generate air bubbles while passing air;
an air tank 129 mounted on the upper part of the casing 127;
and a control valve 124 that is connected to the exhaust pipe 111 and the air tank 129 and whose flow path is changed by the control unit 185,
When a data value greater than the rated flow rate is received from the flow meter 133, the control unit 185 controls the pitch angle to be a normal flow rate, and when a data value greater than the rated pressure is received from the pressure gauge 145, the By opening the control valve 157 to store air in the accumulator 163, it is controlled so that the normal pressure is maintained, and when a data value greater than the stop pressure is received from the pressure gauge 145, the pitch angle is adjusted to adjust the blade Stop the rotation of 107, and when the flow rate of the flow rate meter 133 is greater than or equal to the specified flow rate and the pressure is less than or equal to the specified pressure, the control valve 124 is driven to block the flow path connected to the casing 127 and the air tank A water quality improvement system, characterized in that it is programmed to open the flow path to (129) and let air in.
As a control method of the water quality improvement system according to claim 1,
Since the blade 107 is rotated by the wind power, the air pump 105 is operated to pressurize air to the exhaust pipe 111, thereby generating bubbles in the aerator 125. A driving step ( S) and
After the driving step (S), the control unit 185 receives the data value from the velocity meter 133, so that the pitch value of the blade 107 is maintained at the rated flow rate, and the pitch is smaller than the rated flow rate. Adjust the value so that the rotation speed of the blade 107 is increased, and if it is greater than the rated flow speed, the pitch value is adjusted to decrease the rotation speed, and then the data value is received from the anemometer 133 and compared with the rated flow speed A flow rate sensing step (T) of repeating the above steps,
After the driving step (S), the control unit 185 receives the data value from the pressure gauge 145 and closes the control valve 157 if the rated pressure is less than the rated pressure, and compares it with the stop pressure when the rated pressure is greater than the rated pressure. If it is small, the control valve 157 is opened to store air in the accumulator 163, and if it is greater than the stop pressure, the pitch value is adjusted to stop the rotation of the blade 107 and stop all processes. , a pressure sensing step (U) of repeating the driving step (S) and starting all processes,
After the driving step (S), the control unit 185 receives the data value from the pressure gauge 145, opens the control valve 157 to supply air when the pressure is less than the minimum pressure, and then receives the data value again. A pressure supplement step (W) of repeating the process of comparing with the minimum pressure and closing the control valve 157 when the data value is greater than the minimum pressure;
After the driving step (S), the control unit 185 drives the control valve 124 when the flow rate of the flow rate meter 133 is greater than or equal to the specified flow rate and the pressure is less than or equal to the specified pressure, and the flow path connected to the casing 127 . The control method of the water quality improvement system, characterized in that it comprises the aeration abnormality detection step (K) to block the air flow path to the air tank (129) to allow air to flow in (K).

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