JP2009018254A - Gas dissolving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas dissolving apparatus which removes clogging floating materials not manually but automatically and which can restart after sucking the floating materials into a water intake part. <P>SOLUTION: The gas dissolving apparatus sucks up, by a pump, water existing in the environment including the sea, a lake, a river, a dam and a canal, charges the sucked up water to a dissolving tank after mixing with a gas such as oxygen for dissolving the gas in the dissolving tank, and discharges the gas dissolved water into water. The gas dissolving apparatus consists of: the water intake part taking in water from an arbitrary water area through a first water intake pipe; a discharge part discharging the gas dissolved water to an arbitrary water area through a first water discharge pipe; a second water intake pipe connecting the discharge part with the suction side of the pump; a second water discharge pipe connecting the discharge part of the dissolving tank with the water intake part; and a piping passage switching means selectively communicating the first water intake pipe and the first discharge pipe to the second water intake pipe and the second discharge pipe, and is so constituted that the floating materials are eliminated by switching a valve in the pipe. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gas dissolving device that pumps up water such as lakes, dissolves a gas such as oxygen in the water, and then returns it to the original water area. The present invention relates to a gas dissolving device that can automatically eliminate the blockage even when the operation is stopped due to the suction of an object and the pipeline is blocked.

Domestic wastewater and industrial wastewater flow into the sea (ports), lakes, rivers, dams, moats, etc., and these wastewater contains organic substances and nutrient salts. Some of these settle to the bottom of the water and become organic sludge.
Since the microorganisms in the water consume dissolved oxygen in the water in order to decompose them, if the oxygen supply to the water in the bottom layer is less than the consumption, it becomes in an oxygen-poor state.

When bottom water falls into an anoxic state, organic matter in the bottom mud is anaerobically decomposed, and substances harmful to organisms such as sulfides and methane gas are generated.
In addition, when the bottom mud becomes deficient in oxygen, nutrients in the bottom mud are likely to elute, increasing the concentration of nutrients in the water and causing the occurrence of red sea urchins and red tides.

  FIG. 3 is a configuration diagram showing an example of a conventional gas dissolving apparatus. The gas dissolver pumps water from the bottom of lakes, rivers, etc. that are in anoxic state in order to improve the poor oxygen state of the bottom of the sea (ports), lakes, rivers, dams, moats, etc. A gas such as oxygen is dissolved in the solution to increase the dissolved oxygen concentration, and the oxygen-dissolved water is returned to the original water area having the same density (water temperature and salinity).

In the figure, the gas dissolving apparatus has a configuration including a pump 3 that sucks up water in the bottom layer, and a dissolution tank 1 that mixes the water and gas to promote gas dissolution.

  In addition, the discharge side of the pump 3 is provided with a gas control valve 23 for injecting a gas such as air, oxygen, ozone or the like into the pumped water, and controls the amount of gas mixed into the water. An upper part of the dissolution tank 1 is provided with an atmosphere release valve 24 for discharging a gas that has not been dissolved in water into the atmosphere.

  In the gas dissolving apparatus having such a configuration, first, water is sucked by the pump 3 through the check valve 21 and at the same time, a gas such as oxygen is injected through the gas regulating valve 23 provided on the discharge side of the pump 3. Further, this water is jetted into the dissolution tank 1. In the dissolution tank 1, gas dissolution is promoted. Dissolved water (gas-dissolved water) is discharged from the discharge unit 52 to the original water bottom via the control valve 22 provided at the lower part of the dissolution tank 1.

JP 2005-161174 A JP 2004-188263 A

  However, in the gas dissolving apparatus as described above, when floating matter such as a plastic bag is sucked into the water intake unit, the water intake unit becomes entangled and causes a shutdown. Occluded suspended solids may leave the water intake when the device stops, and the device may become operational.In many cases, however, the floating floating material will not leave the water intake and must be removed manually. There is a problem of not becoming.

  The present invention eliminates the drawbacks of the conventional apparatus as described above, and even when the suspended matter is sucked into the water intake section, the gas dissolving apparatus can automatically remove the blocked suspended matter and restart the apparatus instead of manual operation. The purpose is to realize.

In order to achieve the above object, in claim 1 of the present invention, water existing in the environment including the sea, lakes, rivers, dams, moats is pumped, and the pumped water and gases such as oxygen are used. In a gas dissolution apparatus that mixes and injects into a dissolution tank, performs gas dissolution in the dissolution tank, and discharges the gas dissolved water into the water, a water intake section that takes in water from an arbitrary water area via the first water intake pipe; A discharge part that discharges the gas-dissolved water to an arbitrary water area through the first discharge pipe, a second intake pipe that connects the discharge part and the pump, and the dissolution tank and the intake part are connected. The second discharge pipe, the first intake pipe and the first discharge pipe, and the pipe switching means for selectively conducting the second intake pipe and the second discharge pipe, To do.

  According to a second aspect of the present invention, in the gas dissolving apparatus of the first aspect, the pipe switching means is a valve inserted into each pipe.

  According to a third aspect of the present invention, in the gas dissolving device of the first or second aspect, the water intake section and the discharge section have the same shape.

  According to a fourth aspect of the present invention, in the gas dissolving apparatus according to any one of the first to third aspects, the pipe switching is performed by monitoring an operating state of the gas dissolving apparatus.

  According to claim 5, in the gas dissolving apparatus according to claim 4, the operating status of the gas dissolving apparatus is a suction pressure (negative pressure) and / or a discharge flow rate of the pump and / or a pressure in the dissolution tank. It is characterized by.

  According to a sixth aspect of the present invention, in the gas dissolving apparatus according to the first to third aspects, the pipe line switching is periodically performed.

  According to a seventh aspect of the present invention, in the gas dissolving apparatus according to any one of the first to sixth aspects, the pipe switching is performed every time the apparatus is started.

  As described above, the gas dissolving device of the present invention can selectively switch the pipes to reverse the flow of water in the water intake part and the discharge part, so that even when floating matter is sucked into the water intake part, By switching the path, water can be discharged from the intake section, and suspended matter clinging to the intake section can be removed by the water force.

  Hereinafter, the gas dissolving apparatus of this invention is demonstrated using drawing.

FIG. 1 is a block diagram showing an embodiment of the gas dissolving apparatus of the present invention. In the figure, the same components as those shown in FIG.
As shown in FIG. 1, in the gas dissolving device, first, the piping of the gas dissolving device is connected to the suction side of the pump 3 and the water intake part 51 to take in water from an arbitrary water area, and discharge. 1st discharge piping which connects the discharge part and discharge part 52 from the 2nd water intake piping 5 which connects the part 52 and the suction side of the pump 3, and the dissolution tank 1, and discharges | dissolves gaseous dissolved water to arbitrary water areas 6 and the second discharge pipe 7 that connects the discharge portion from the dissolution tank 1 and the water intake portion 51.
Further, as shown in FIG. 1, a valve 26 is inserted into the first intake pipe 4, a valve 27 is inserted into the first discharge pipe 6, and a valve 28 is inserted into the second intake pipe 5. A valve 29 is inserted into the second discharge pipe 7.

Valves 26 to 29 inserted in the respective pipes are conduits that selectively connect the first intake pipe 4 and the first discharge pipe 6 to the second intake pipe 5 and the second discharge pipe 7. It constitutes switching means.

In the gas dissolving apparatus, a gas regulating valve 23 is provided on the discharge side of the pump 3 so that the amount of gas fed into the dissolving tank 1 can be controlled.
When the pump 3 is on the water surface, when the pump 3 is stopped, water in the pump 3 is drained by gravity, and a priming operation is required at the next startup. The check valve 21 provided on the suction side of the pump 3 is for preventing the water in the pump 3 from escaping.
In addition, a control valve 22 for discharging the dissolved water is provided at the lower position of the dissolution tank 1 so that the amount of the dissolved gas dissolved water can be controlled. Furthermore, an atmospheric release valve 24 that opens undissolved gas to the atmosphere is provided at an upper position where the gas in the dissolution tank 1 is accumulated, so that the amount of gas to be opened can be controlled.

  The flow rate of the water in which the gas is dissolved in the dissolution tank 1 is controlled by the control valve 22 and returned to the original water area via the first discharge pipe 6 and the discharge unit 52.

  The first intake pipe 4 and the first discharge pipe 6 are selected as pipes in a normal state (when water is sucked from the intake part 51) and no floating matter is entangled in the intake part 51. The state of each valve in accordance with the selection of piping closes the valve 28 and the valve 29 and opens the valve 26 and the valve 27.

  That is, water from a river or the like is pumped up by the pump 3 via the intake 51 and the first intake pipe 4, and the gas dissolved water obtained from the dissolution tank 1 passes through the first discharge pipe 6 and the discharge part 52. Returned to original waters.

  Next, in the gas dissolving apparatus, when a floating substance is entangled in the water intake 51, the second water intake pipe 5 and the second discharge pipe are used instead of the first water intake pipe 4 and the first discharge pipe 6. 7 is selected.

  In the state of each valve, the valve 26 and the valve 27 are closed, and the valve 28 and the valve 29 are opened.

  That is, water from a river or the like is pumped up by the pump 3 via the discharge part 52 and the second intake pipe 5, and the gas dissolved water obtained from the dissolution tank 1 is passed through the second discharge pipe 7 and the intake part 51. Returned to original waters. By performing such an operation, the gas-dissolved water can be discharged from the water intake 51 and the suspended matter entangled in the water intake 51 can be removed by the water force.

After removing the suspended matter entangled in the water intake 51, the gas dissolving device moves the pipe from the second water intake pipe 5 to the first water intake pipe 4 and from the second discharge pipe 7 to the first discharge pipe 6. To return to the normal state.

  Here, for the sake of safety of the gas dissolving apparatus, when switching the pipes, all the valves are first opened, and then the valves in the pipes to be shut off are closed. For example, in the above case, the valves 28 and 29 are opened, and then the valves 26 and 27 are closed.

In the gas dissolving apparatus, at least the pressure (negative pressure) on the suction side of the pump 3 increases, the discharge amount decreases from the discharge unit 52, or the pressure in the dissolution tank 1 decreases. If one state is detected, it is possible to detect that the suspended matter is tangled in the water intake 51. That is, the pipeline switching is performed by monitoring the operating state of the gas dissolving apparatus.

Further, in the gas dissolving device, the check valve 21 is inserted on the suction side of the pump 3, but when the pump 3 is installed in water, air is not taken into the suction side of the pump 3, The check valve 21 is not necessary.

  FIG. 2 is a block diagram showing another embodiment of the gas dissolving apparatus of the present invention. In the figure, the same components as those in FIGS. 1 and 3 are denoted by the same reference numerals. In the example shown in the figure, the water intake part 51 and the discharge part 52 in FIG. 1 are configured by the access parts 53a and 53b having the same shape.

  In the normal state (when water is sucked from the inlet / outlet portion 53a) and the suspended matter is entangled in the inlet / outlet portion 53a, the second intake pipe 5 is used to exchange the functions of the inlet / outlet portion 53a and the inlet / outlet portion 53b. And the second discharge pipe 7 is selected. The setting of each valve accompanying the setting of piping closes the valve 26 and the valve 27 and opens the valve 28 and the valve 29.

That is, water in a river or the like is pumped up by the pump 3 through the inlet / outlet portion 53b and the second intake pipe 5, and the gas dissolved water obtained from the dissolution tank 1 passes through the second discharge pipe 7 and the inlet / outlet portion 53a. Returned to original waters.

Furthermore, the mouth of the entrance / exit part 53a and the entrance / exit part 53b is a shape which can discharge | release gas dissolved water freely in the range of 360 degree | times.

In the state where the shape of the entrance / exit part 53a and the entrance / exit part 53b is the same, the gas dissolving device can remove the suspended matter by switching the pipe when the suspended matter is entangled with the entrance / exit part 53a. Even after removing floating matter from the entrance / exit 53a, the entrance / exit 53b functions as a water intake and the entrance / exit 53a functions as a discharge unit, so that the functions of the entrance / exit 53a, 53b can be continuously operated without returning. I can do it.

  In the state where the entrance / exit part 53b functions as the water intake part and the entrance / exit part 53a functions as the discharge part, when the suspended matter is entangled with the entry / exit part 53b again, the suspended matter is entangled with the entry / exit part 53a. Switch the piping in the same way as.

That is, water in a river or the like is pumped up by the pump 3 through the inlet / outlet portion 53a and the first intake pipe 4, and the gas dissolved water obtained from the dissolution tank 1 passes through the first discharge pipe 6 and the inlet / outlet portion 53b. Returned to original waters. The suspended matter entangled in the entrance / exit 53b is removed, and the gas dissolving apparatus can operate continuously without stopping even after the removal.

  In addition, even when floating substances smaller than a plastic bag or the like are entangled with the entrance / exit part 53a and the water is flowing in a state where the entrance / exit part 53a is not completely blocked, the suspended substance can be removed by switching the piping.

In this way, even in the state before the suspended matter is completely clogged in the entrance / exit 53a and the entrance / exit 53b, the suspended matter can be removed, so that the gas dissolution apparatus can be regularly prevented.

In addition, by switching the pipeline every time the gas dissolving device is started, the floating matter can be obtained even in a state where the floating portion 53a and the inlet / outlet portion 53b are filled with floating matter before the starting or in a state before being completely clogged. Therefore, the gas dissolving apparatus can be regularly prevented.
Furthermore, even if there is no mechanism for detecting that the suspended matter is entangled in the entrance / exit parts 53a and 53b, if the suspension is caused by the entanglement of the suspended matter, the suspended matter Can be removed.

FIG. 1 is a block diagram showing an embodiment of the gas dissolving apparatus of the present invention. FIG. 2 is a block diagram showing another embodiment of the gas dissolving apparatus of the present invention. FIG. 3 is a block diagram showing an example of a conventional gas dissolving apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dissolution tank 3 Pump 4 1st intake piping 5 2nd intake piping 6 1st discharge piping 7 2nd discharge piping 21 Check valve 22 Control valve 23 Gas control valve 24 Atmospheric release valve
26 valve 27 valve 28 valve 29 valve 51 intake part 52 discharge part 53a in / out part 53b in / out part

Claims (7)

Pumps up water existing in the environment including the sea, lakes, rivers, dams, moats, mixes the pumped water and gas such as oxygen, and injects them into the dissolution tank. In a gas dissolving device that discharges dissolved water into water,
A water intake section that takes in water from any water area via the first water intake pipe;
A discharge part for discharging the gas-dissolved water to an arbitrary water area via the first discharge pipe;
A second intake pipe connecting the discharge part and the suction side of the pump;
A second discharge pipe connecting the discharge portion from the dissolution tank and the water intake portion;
A gas dissolving apparatus comprising: the first intake pipe and the first discharge pipe; and a pipe switching means for selectively connecting the second intake pipe and the second discharge pipe. 2. The gas dissolving apparatus according to claim 1, wherein the pipe switching means is a valve inserted into each pipe. The gas dissolving device according to claim 1, wherein the water intake unit and the discharge unit have the same shape. 4. The gas dissolving apparatus according to claim 1, wherein the pipe switching is performed by monitoring an operating state of the gas dissolving apparatus. 5. The gas dissolving apparatus according to claim 4, wherein the operating state of the gas dissolving apparatus is a suction pressure (negative pressure) and / or a discharge flow rate of the pump and / or a pressure in the dissolution tank. The gas dissolving apparatus according to any one of claims 1 to 3, wherein the pipe switching is periodically performed. 7. The gas dissolving apparatus according to claim 1, wherein the pipe switching is performed every time the apparatus is started.

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