JPH0732842B2 - Water tank sediment removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a device for automatically removing sand, mud, etc. accumulated in a water tank, particularly a water tower, a cooling tower for an air conditioner, and a lower water tank of a heat exchange tower. It is about.

<Prior Art> In this type of water tank, water is contaminated by dust and the like contained in the outside air, accumulates in the water tank, accumulates as mud, flows into the water circulation circuit, and damages these circulating devices. Reduce the heat exchange rate. This tendency is remarkable in volcanic ash soil areas and desert areas.

The applicant company developed a cooling tower in which such mud was once settled in a water tank and prevented from flowing into the circulation circuit, and the application was made in Japanese Patent Application No. 55-23636 (No. 59-32879). However, when cleaning and removing mud attached to the inclined bottom plate that receives the water flowing down from the filler, the operation of the cooling tower is temporarily stopped and the slanted bottom plate is blocked. Drain the water in the falling water tank connected via a plate, open the mud outlet provided on the inclined bottom plate near the weir, discharge the sludge that has settled, and then supply the cleaning liquid to the inclined bottom plate from the cleaning water supply port to clean it. It requires time and effort, the cooling tower has to be stopped during the cleaning period, which reduces operating efficiency, and it is necessary to change the structure of the existing pushing water tank due to the arrangement of the dam. Yes, easily removes mud, etc. from the existing push-in tank It is not possible to add a function.

<Problems to be Solved by the Invention> The present invention solves the above-described problems and provides a cooling tank with a function of removing deposits such as mud from the water tank without modifying the bottom surface of the existing water tank or with a slight modification. An object of the present invention is to provide to the market an apparatus for removing deposits in a water tank, which is capable of efficiently cleaning the bottom surface of the water tank without stopping the operation of the above.

<Means for Solving the Problem> In order to solve this problem, the present invention provides a cooling tower for air conditioning,
The sand mud suction part, which is parallel to one side of the lower rectangular water tank used for one of the heating towers and has a length corresponding to the entire length of this side, is provided on the bottom surface of the water tank. The bottom surface of the suction cover plate to be formed is parallel to the bottom surface of the water tank, and the suction port is provided at the center of the suction cover plate, and the suction pipe or hose connected to this suction port extends from the liquid in the tank to above the liquid surface. Further, it is connected to the primary side of the suction-type solid-liquid separator outside the water tank, and a plurality of short, equal-height ridges are provided on the bottom surface of the suction cover plate toward the suction port. In the gap between the bottoms of the water tank and the bottom surface of the suction cover plate between these ridges, several suction guide paths are formed, and the suction ports of these suction conductive paths are distributed over the entire length of one side of the water tank. As a deposit removing device in a water tank characterized by being formed A.

<Example> A typical example of the present invention will be described.

In FIG. 1 to FIG. 5, 10 is a lower water tank for a cooling tower, the plan shape of this water tank 10 is rectangular, and the bottom surface of this water tank 10 is such that the central part thereof becomes higher toward one short side. 11 is formed and the remaining bottom surface 11 is horizontal.

In the central portion of the bottom surface 11, a sand-mud suction section 12 for sucking out sediment such as mud is provided in parallel with the short side of the water tank 10, and the length of the suction section 12 is the same as the length of the short side. They are the same. A plurality of (8 in the figure) cleaning liquid discharge pipes 13 are arranged in parallel to each other on both sides of this central portion at a position slightly separated from the bottom surface 11 of the water tank 10 below the liquid surface of the water tank 10. It is laid horizontally across the bottom of the tank. The direction of the plurality of discharge holes 14 formed in each discharge pipe 13 at equal pitches is toward the sand and mud suction portion 12 downward with respect to the horizontal direction, and the upstream ends of these discharge pipes 13 are Each is connected to a common header extending along one long side of the water tank 10 and communicates with a cleaning liquid supply source (not shown).

The direction of the discharge holes 14 is preferably at an angle at which the liquid flow ejected from these passes below the adjacent cleaning liquid discharge pipe 13.

The primary side of the solid-liquid separator 15 communicates with the sand-mud suction part 12 via a suction pipe or a hose 16, and the secondary side liquid discharge port thereof is connected to a water discharge part 17 opening on the side wall of the water tank 10. A system path is formed for returning water separated by communication through the pipe 18 to the water tank 10. The position of the sand-mud suction part 12 may be a position along one short side of the water tank 10, and the solid-liquid separator.
The present invention is the same even when the secondary side liquid discharge port of 15 is opened to the outside and the liquid is discharged. Also, the suction port of the sand and mud suction unit 12
12a may be provided by penetrating the side plate or the bottom plate of the water tank 10.

The bottom surface of the suction cover plate 20 forming the sand and mud suction portion 12 is parallel to the bottom surface 11 of the water tank 10.
A suction port 21 which is a suction port 12a of the sand and mud suction unit 12 is bored in the center of the sand mud suction unit 12, and a ridge 22 having a uniform bottom radially extending toward the suction port 21 serves as the suction cover. A plurality of suction guide paths 23 are formed in the bottom surface of the plate 20, and between these ridges 22 in the gap between the bottom surface 11 of the water tank 10 and the bottom of the sand / mud suction cover plate 20. The suction ports 23a of 23 are distributed and formed over the entire length of the short side of the water tank 10.

A pair of left and right inverted U-shaped handles 24 are erected and fixed on the upper surface of the sand / mud suction cover plate 20.
Inward projections 27 and 28 that are inclined by 45 degrees over the entire length are symmetrically arranged on the pair of long sides 25 and 26 of the sand mud suction cover plate 20 with respect to the water tank 10. It is self-standing with the ridge 22 facing downward at the center of the bottom surface 11, and at this time, the long sides 25 and 26 are set parallel to the short sides of the water tank 10.

The sand cutting cover plate 30 placed so as to cover the upper surface of the sand and mud suction cover plate 20 is made of a mold material having a mountain-shaped cross section, and one inverted U-shaped handle 31 is attached to the center of the top. Yes, a pair of left and right inclined surfaces 32 of the sand cover plate 30,
33 is inclined at 45 degrees, and the lower end 32 of each inclined surface 32, 33
Left and right inclined surfaces of a plurality of widthwise and cross-sectional support plates 34 (four in the case shown) at intervals a, 33a in the longitudinal direction.
It is built between 32 and 33.

The width dimension of the sand cover plate 30, that is, the right and left inclined surfaces 32,
The width dimension b between the lower ends 32a and 33a of the 33 is formed so as to match the width dimension b ₀ of the sand-mud suction cover plate 20, and these inclined surfaces 32,
The lower ends 32a, 33a of 33 and the lower surface of the horizontal side 35 of the support plate 34 are located in the same plane, and both end portions 36, 37 of each support plate 34 and the root portions 38 of the inner surfaces of each inclined surface 32, 33, A pair of left and right inward projections 27 and 28 of the sand and mud suction cover plate 20 are freely engageable with 39, and a horizontal side 35 of the support plate 34 is provided at the time of this engagement.
Is placed on the upper surface of the sand / mud suction cover plate 20, and the sand cutting cover plate 30 is separably and integrally arranged on the sand / mud suction cover plate 20 at the center of the bottom surface of the water tank 10.

<Operation> The operation of the present invention of the above configuration will be described below.

First, the suction cover plate 20 is placed on the bottom surface of the water tank 10, and the sand cover plate 30 is placed on the suction cover plate 20, and the upper surface of the suction cover plate 20 is covered with the sand cover plate 30. In this state, the water tank 10 is filled with water, and cooling water or cooled water that has flowed down the cooling tower filling material as in the conventional case is used in the water tank 10.
It is collected inside and circulated in the water tank or the refrigerator above the cooling tower.

During the operation of this cooling tower, the cooling water is contaminated by dust mixed in the outside air and becomes mud, and deposits such as mud accumulated on the bottom surface 11 of the water tank 10 are sucked out from the discharge holes 14 of the discharge pipe 13 through the sand mud. Department
The sand or mud pushed toward the surface 12 by the washing liquid flow A flowing along the bottom surface 11 and gathered to the sand-mud suction part 12 flows to the suction-type solid-liquid separator 15 together with the water flow flowing in the suction guiding path 23. Sucked out.

At this time, since the upper surface of the suction cover plate 20 in the sand / mud suction part 12 is covered by the sand cutting cover plate 30, sediments such as sand and mud that are about to accumulate on the sand / mud suction part 12 Are distributed to the left and right sides of the suction cover plate 20 along a pair of right and left slanted sides of the sand cutting cover plate 30, are sand-cut, and concentrate on the outer periphery of the suction port 23a of the suction guide path 23 to concentrate on the sand mud suction portion. 12 Sediment such as sand and mud does not accumulate on the upper part,
The upper part of the sand / mud suction part 12 is always maintained in a clean state.

Then, the sediment such as sand and mud separated from water in the suction-type solid-liquid separator 15 is discharged and removed to the outside, and only water is supplied to the water discharge unit 16 on the side wall of the water tank 10 through the connection pipe 17. The water is returned and supplied again as cooling water from the water tank 10 to a refrigerator or the like for circulation.

When the suction cover plate 20 and the sand-cut cover plate 30 are to be replaced due to dirt or damage due to long-term use, they are taken out of the water tank 10 separately, cleaned, or replaced with new ones.

In the above description of the embodiment, the water tank 10 is the lower water tank of the cooling tower, but the present invention is also the same as a water supply water tank and a lower water tank of the heat exchange tower.

In the above-mentioned embodiment, a mode in which eight cleaning discharge pipes 13 are arranged in parallel has been described. Even a mode in which the reciprocating device is horizontally reciprocated from the side portion to the suction portion 12 position, the discharge pipe 13 is periodically reciprocated, and the entire bottom surface is washed by the discharged washing liquid belongs to the technical scope of the present invention.

Further, even if the sand / mud suction part 12 is moved over the entire bottom surface 11 of the water tank 10 to suck and remove the sand / mud, the present invention is the same.

<Effects of the Invention> The effects of the present invention configured as described above will be described.

By constructing the sand and mud suction part by the suction cover plate, the structure is simplified, and the collection of the sediment and the suction work from the water tank can be performed with almost no trouble.

By forming the ridges of the same height on the bottom surface of this suction cover plate, this suction cover plate can be installed horizontally at the center of the bottom surface of the water tank, and the sand and mud suction part can be easily installed without processing the bottom surface. It can be formed on a part of the bottom surface.

<Effects specific to the embodiment> The suction cover plate 20 installed on a part of the bottom surface 11 of the water tank 10.
In the embodiment in which the upper part of the cover is covered with the sand cutting cover plate 30 having the chevron cross section, it is possible to prevent the deposits from staying on the upper part of the suction cover plate 20, and to prevent the deposits falling on the suction cover plate 20 The sand cover plate 30 allows the suction cover plate
It can be surely distributed to the left and right of 20 and sucked toward the suction port 21 on the bottom surface.

[Brief description of drawings]

FIG. 1 relates to the present invention, FIG. 1 is a schematic plan view showing a typical embodiment of this apparatus, FIG. 2 is a longitudinal side view thereof,
FIG. 3 is an enlarged vertical sectional view showing a typical embodiment of the suction part structure, FIG. 4 is a bottom view of the suction cover plate of FIG. 3, and FIG. 5 is a plan view of the sanding cover plate. is there. Explanation of main symbols in the figure 10 …… Water tank, 12 …… Suction part, 13 …… Cleaning liquid discharge pipe.

Claims (2)

[Claims] 1. A sand mud sucking section having a length corresponding to the entire length of a flat rectangular lower water tank used for one of an air conditioning cooling tower and a heating tower, which is parallel to one side, is provided on the bottom surface of the water tank. The bottom surface of the suction cover plate forming the sand and mud suction part is parallel to the bottom surface of the water tank, the suction port is provided at the center of the suction cover plate, and the suction pipe or hose connected to the suction port is It is connected to the primary side of the suction-type solid-liquid separator outside the water tank, which further extends above the liquid surface from the water tank liquid,
The bottom surface of the suction cover plate is provided with a plurality of short, low-profile projections toward the suction port, and the gap between the projections and the bottom surface of the water tank and the bottom surface of the suction cover plate. In the water tank deposit removing device, a plurality of suction guide paths are formed in a compartment, and the suction ports of these suction conductive paths are distributed over the entire length of one side of the water tank. 2. The apparatus for removing deposits in a water tank according to claim 1, wherein the suction cover plate is a suction cover plate whose upper surface is covered with a sand cutting cover plate having a mountain-shaped cross section.