JP6801559B2 - Sludge discharge method and equipment from cooling tower pit - Google Patents

Description

The present invention relates to a method and an apparatus for discharging sludge from a cooling tower pit.

Conventionally, in order to discharge sludge accumulated in the cooling tower pit (water tank) in the cooling water system during continuous operation, it is necessary to stop the operation and drain the water from the water system for cleaning. For this reason, cleaning was carried out only during holidays such as the year-end holidays and Obon holidays when business establishments are closed.

In Patent Document 1, as a method of removing sludge accumulated in the cooling tower pit, the cooling water in the cooling tower pit is sent to a filtration device (side filter) by using a pump, and the filtered treated water is re-used. , The processing method of returning to the cooling tower pit is described.

Japanese Unexamined Patent Publication No. 2004-188270

In the method of Patent Document 1, the apparatus is expensive and a power supply work is required because a pump is used. The present invention provides a sludge discharge method and an apparatus from a cooling tower pit, which enables cleaning at any time while operating without draining water in the cooling tower pit and can be performed without a power source. The purpose is.

The sludge discharge method from the cooling tower pit of the present invention is a sludge discharge method in which the sludge deposited at the bottom of the cooling tower pit is discharged to the outside of the system by discharging the cooling water in the cooling tower pit by a siphon pipe. One end of the pipe is immersed in a cooling tower pit to suck cooling water, and the cooling water flowing out of the siphon pipe is made to flow into a solid-liquid separator for solid-liquid separation.

The sludge discharge device from the cooling tower pit of the present invention has a siphon pipe whose one end is inserted into the cooling tower pit, and a solid-liquid separator that receives cooling water flowing out from the other end of the siphon pipe.

In one aspect of the present invention, the solid-liquid separator is provided with a container, the inside of the container is divided into a plurality of solid-liquid separation chambers by a partition plate, and cooling water is separated into a first solid-liquid separation in the solid-liquid separation container. After being introduced into the chamber, the partition plate overflows and moves to the adjacent solid-liquid separation chamber, and sludge in the cooling water settles in each solid-liquid separation chamber to separate the solid-liquid, and the final solid-liquid separation chamber. The treated water is discharged from the solid-liquid separator.

In one aspect of the present invention, the inside of the solid-liquid separator is partitioned into 2 to 4 solid-liquid separation chambers by a partition plate. In one aspect of the invention, at least one of the dividers has holes.

In one aspect of the present invention, the siphon tube is provided with a valve for blocking the flow of cooling water.

According to the sludge discharge method and apparatus from the cooling tower pit of the present invention, it is possible to perform cleaning at any time while operating without draining the water in the cooling tower pit. In addition, because it uses a siphon system, it can be cleaned without a power supply. Further, the configuration of the device is simple, the cost is low, and the device is easy to carry.

In the present invention, since the cooling water in the cooling tower pit is passed through the solid-liquid separator, the sludge recovery work is easy.

It is a schematic diagram of the circulation cooling water system cleaned by the sludge discharge method from the cooling tower pit and the apparatus which concerns on embodiment. It is a perspective view which shows another example of a solid-liquid separator.

Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of the present invention.

In the cooling tower 1, the cooling water sprinkled from the sprinkler pipe 1a is cooled in contact with the air introduced from the louver 1c while flowing down the filler layer 1b, and is cooled in the cooling tower pit (lower water tank) 1d. Is stored as. The air containing steam is exhausted to the atmosphere by the fan 1e.

The cooling water in the cooling tower pit 1d is extracted by the pump P and supplied to the heat exchanger 3 from the cooling water supply pipe 2. The water heated by heat exchange in the heat exchanger 3 is returned from the return pipe 4 to the sprinkler pipe 1a of the cooling tower 1, cooled, and circulated for use. The cooling tower 1 is provided with a pipe 5 for introducing make-up water into the cooling water system, and water is supplied by a ball tap (not shown) so that the water level in the cooling tower pit 1d is localized. A blow pipe (not shown) is provided in the cooling tower pit 1d.

In this embodiment, a discharge device for discharging sludge accumulated in the cooling tower pit 1d is provided. This discharge device has a siphon pipe 10 and a solid-liquid separator 20 into which effluent is introduced from the siphon pipe 10. An on-off valve may be provided on the siphon tube 10. Further, the siphon pipe 10 may be provided with a manual pump capable of sucking water in the cooling tower pit 1d to activate the siphon.

According to this discharge device, cleaning can be performed at any time while operating without draining the water in the cooling tower pit. Moreover, since it is a siphon system, it can be cleaned without a power supply. Further, the configuration of the device is simple, the cost is low, and the device is easy to carry.

The siphon tube 10 may be any one capable of forming a siphon, but a hose-shaped tube 10 is preferably used because it can be easily moved to any place in the cooling tower pit 1d.

One end of the hose-shaped siphon pipe 10 may be directly immersed in the pit in order to discharge the cooling water from the cooling tower pit 1d, but if the hose is too flexible and the discharge position of the cooling tower pit cannot be determined. , It is desirable to connect a straight pipe made of hard pipe such as vinyl chloride to the tip of the hose for easy handling.

In order to configure the cooling water to flow into the solid-liquid separator 20 from the other end of the siphon tube 10, the other end of the siphon tube 10 may be simply inserted into the solid-liquid separator 20, but the solid-liquid separator 20 It is desirable to fix the end of the siphon tube 10 to the siphon tube 10 so that the siphon tube 10 does not come off from the solid-liquid separator 20.

In this embodiment, the solid-liquid separator 20 has a container 21 and one or more (three in this embodiment) partition plates 22, 23, 24 erected in the container 21. Then, the solid-liquid separation chambers 31 to 34 are partitioned by the partition plates 22 to 24. The heights of the partition plates 22, 23, and 24 are sequentially lowered. The cooling water from the siphon pipe 10 enters the solid-liquid separation chamber 31 for solid-liquid separation, then overflows the partition plate 22 and enters the second solid-liquid separation chamber 32 for solid-liquid separation, and further, the partition plate 23 Overflowed into the third solid-liquid separation chamber 33 for solid-liquid separation, and further overflowed the partition plate 24 into the fourth solid-liquid separation chamber 34 for solid-liquid separation, and the clarified water was discharged. Outflow from 35. In the solid-liquid separation chambers 31 to 34, sludge is solid-liquid separated by gravity sedimentation.

As described above, it is not always necessary to make the heights of the plurality of partition plates different, but if necessary, the partition plates 22 to so that water flows smoothly from the first solid-liquid separation chamber 31 to the final solid-liquid separation chamber 34. It is desirable to adjust the height of 24. By allowing the cooling water to sequentially flow to the next solid-liquid separation chamber over the upper portions of the partition plates 22 to 24, sludge contained in the cooling water is settled and separated in each solid-liquid separation chamber 31 to 34. To.

Each partition plate 22 to 24 may be provided with a hole through which water can pass but sludge does not easily pass through. With such a configuration, water flows more smoothly from the solid-liquid separation chamber to the next solid-liquid separation chamber, so that solid-liquid separation can be performed in a short time, which is desirable. The holes in this partition plate may be gradually clogged with sludge, but even in that case, water sequentially flows over the upper part of the partition plate to the next adjacent solid-liquid separation chamber, so solid-liquid separation is performed as it is. It is possible to continue. The size of the holes provided in the partition plate is preferably 3 to 10 mm in diameter, more preferably 5 to 8 mm in diameter. Further, the holes of the partition plate may be provided on the entire surface of the partition plate, but by providing the holes at a position of 10 to 100%, more preferably 30 to 80% from the bottom of the partition plate, sludge can be provided in each solid-liquid separation chamber. This is desirable because it causes sufficient sedimentation and water flows more smoothly from the solid-liquid separation chamber to the next solid-liquid separation chamber.

The number of solid-liquid separation chambers partitioned in the container 21 by the partition plate may be selected appropriately depending on the sedimentation property of sludge and the amount of cooling water for solid-liquid separation, and is usually selected from 2 to 4. preferable.

To select the number of compartments, a solid-liquid separator having a different number of compartments may be prepared in advance, and which solid-liquid separator to be used may be selected by actually passing cooling water. In addition, the same solid-liquid separator is used in common, and only the types of partition plates to be installed in the solid-liquid separator are prepared, and the required number of partition plates are fixed. By inserting it into a liquid separator, a solid-liquid separator having a required number of solid-liquid separation chambers may be configured. It is desirable to be able to remove the partition plate from the solid-liquid separator because sludge can be easily collected after solid-liquid separation.

In the present invention, by providing the siphon pipe 10 with a valve, the sludge discharge work from the cooling tower pit 1d can be easily interrupted. In addition, it is not easy to keep the hose in a bent state by the method of bending the hose to block the flow of cooling water, and if the flow of cooling water is not sufficiently blocked, the water in the hose will flow out. , Since the siphon principle does not work, it was necessary to put water in the hose again to make the siphon state in order to resume the work. If a valve is provided, the flow of cooling water can be reliably blocked, so that such a problem does not occur.

The valve may be installed at any position in the siphon pipe 10, but normally, one end of the siphon pipe is immersed in the cooling tower pit and moved while cleaning, so the valve is installed near the cooling tower pit. It is preferable to be done. If the end of the siphon tube 10 on the solid-liquid separator 20 side is not immersed in the water in the container 21, air enters from the end of the siphon tube on the solid-liquid separator 20 side to allow water in the siphon tube to enter. May come off. If the water in the siphon tube drains, the siphon state cannot be maintained. In this case, it is desirable to provide a valve near the end of the tube on the solid-liquid separator side.

In the present invention, the solid-liquid separator 40 having the structure shown in FIG. 2 may be used as the solid-liquid separator. In this solid-liquid separator 40, the container 41 is a box shape having a substantially square shape. In the plan view of the container 41, four partition plates 42, 43, 44, 45 are provided radially from the center of the container 41 toward the four corners of the container 41. The heights of the partition plates 42, 43, 44, and 45 are sequentially lowered. Solid-liquid separation chambers 51, 52, 53, 54 are formed between the partition plates 42 to 45.

As in the case of FIG. 1, the water from the siphon pipe 10 flows into the first solid-liquid separation chamber 51 and sequentially overflows the partition plates 43, 44, 45, and the solid-liquid separation chambers 52, 53, 54. Flows out from the fourth solid-liquid separation chamber 54 through the outlet 55 (or the notch for overflow).

The above description is an example of the present invention, and the present invention may have a configuration other than the above. For example, the container 41 may have a cylindrical shape instead of a box shape.

1 Cooling tower 1d Cooling tower pit 10 Siphon container 20,40 Solid-liquid separator 21,41 Container 22-24, 42-45 Partition plate 31-34, 51-54 Solid-liquid separation chamber

Claims (5)

This is a sludge discharge method in which sludge deposited on the bottom of the cooling tower pit is discharged to the outside of the system by discharging the cooling water in the cooling tower pit with a siphon pipe. One end of the siphon pipe is immersed in the cooling tower pit for cooling. This is a sludge discharge method that sucks water and allows the cooling water that flows out of the siphon tube to flow into the solid-liquid separator for solid-liquid separation .
The solid-liquid separator is provided with a container, the inside of the container is divided into a plurality of solid-liquid separation chambers by a plurality of partition plates, and cooling water is introduced into a first solid-liquid separation chamber in the solid-liquid separation container. After that, the partition plate overflows and moves to the adjacent solid-liquid separation chambers in sequence, and sludge in the cooling water settles in each solid-liquid separation chamber to separate the solid-liquid, and the treated water is separated from the final solid-liquid separation chamber. A method of discharging sludge from a cooling tower pit , wherein the plurality of partition plates are sequentially lowered in height so that the water is discharged to the outside of the solid-liquid separator . The method for discharging sludge from a cooling tower pit according to claim 1, wherein the inside of the solid-liquid separator is partitioned into 3 or 4 solid-liquid separation chambers. The method for discharging sludge from a cooling tower pit according to claim 1 or 2, wherein at least one of the partition plates has a hole. The method for discharging sludge from a cooling tower pit according to any one of claims 1 to 3 , wherein the siphon pipe is provided with a valve for blocking the flow of cooling water. Possess a siphon tube having one end inserted into the cooling tower pit, and a solid-liquid separator for receiving the cooling water flowing out from the other end of the siphon tube,
The solid-liquid separator includes a container and a plurality of partition plates erected so as to partition a plurality of solid-liquid separation chambers in the container, and water from the siphon pipe is separated into a first solid-liquid separator. is introduced into the chamber, flows into the solid-liquid separation chamber for sequentially adjacent overflows the partition plate, the final solid-liquid height of the partition plate of the plurality of such treated water from the separation chamber flows out it is configured successively lower Sludge discharge device from the cooling tower pit.

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