JPH07270094A - Blow-down apparatus for cooling tower - Google Patents

Abstract

PURPOSE:To easily deal merely by replacing a regulating grate in the case of change of a blow-down amount by providing the grate at an upper opening of an over-flow tube in a blow-down apparatus for a cooling tube in which a lower end of a water conducting tube extended from a sprinkling tank of a DC-AC type cooling tower is disposed at the opening of the over-flow tube. CONSTITUTION:A blow-down apparatus for a cooling tower has a water conducting lower end 32 of a water conducting tube 3 connected from a water conducting upper end 31 connected to a bottom of a sprinkling tank 4 of a DC-AC type cooling tower A, and comprises a detachable regulating grate 2 provided at an upper end opening 11 of an over-flow tube 1. The grate 2 has a frame 22 at its peripheral edge in such a manner that a depth side of the frame 22, a diameter of a perforated part 21 formed at a bottom, number of holes are so previously set as to become desired blow-down amount. The grate 2 is selectively used in order to simultaneously hold a circulating water amount (b) constant and to obtain the desired blow-down amount (a) in response to a change of a cooling load or a change of a circulating water amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower blowdown device and, more particularly, to prevent the concentration of circulating water by maintaining the quality of the circulating water by discharging a part of the circulating water of a cross flow type cooling tower. For the device.

[0002]

2. Description of the Related Art The lower end of a water conduit piped from a sprinkler tank of a cross flow type cooling tower is arranged above the overflow pipe, and the upper end of the overflow pipe or the lower end of the water conduit is moved horizontally. Regarding the method of adjusting the blowdown amount that enables the lap range between the lower end of the water pipe and the upper end of the overflow pipe, see Japanese Utility Model Laid-Open No. 62-16648.
No. 6 and Japanese Utility Model Publication No. 62-166487.

However, since the amount of blowdown is adjusted by the degree of deviation between the lower end of the water conduit and the upper opening of the overflow pipe, it is not easy to adjust the water scattering violently. There is.

[0004]

DISCLOSURE OF THE INVENTION The present invention is to solve the above problems, and its gist is to provide a lower end portion of a water conduit pipe connected to a sprinkler tank of a cross flow type cooling tower with an overflow pipe. A blowdown device for a cooling tower, wherein the blowdown device provided at the upper end opening is provided with a detachable adjusting plate at the upper end opening of the overflow pipe.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic side view of a cooling tower incorporating an embodiment of the present invention, FIG. 2 is a side sectional view showing a blowdown state according to the present invention, and FIG. 3 is a side view of another embodiment of the present invention. Shown in cross-section.

According to the present invention, as shown in a schematic side view in FIG. 1, an overflow lower end 32 of a water conduit 3 connected from a water upper end 31 connected to the bottom of a sprinkler tank 4 of a cross flow type cooling tower A is overflowed. A blow-down device for a cooling tower, wherein a blow-down device provided at an upper end opening 11 of a pipe 1 is provided with a removable adjustment plate 2 at an upper end opening 11 of an overflow pipe 1.

The upper end opening 11 of the overflow pipe 1
As shown in the side sectional view of FIG. 2, the adjustment plate 2 which is detachably attached to the rim has a collar portion 22 at the periphery thereof, and the depth dimension and the hole diameter and the number of holes of the hole portion 21 formed at the bottom portion. Etc.
It is preset so that the desired blowdown amount is obtained.
That is, the cooling water sprayed from the water spray tank 4, heat-exchanged by the filler 5, and flowing down to the water receiving tank 6 is supplied from the circulation pipe 7 to the water spray tank 4.
In order to prevent concentration by natural loss of circulating water and to maintain the water quality, it is necessary to make up the amount of make-up water that exceeds the amount of lost water. The above adjustment plate 2 so that the desired blowdown amount a is obtained according to the fluctuation of the cooling load and the change of the circulating water amount.
Select to use.

Further, in the present invention, when the adjusting plate 2 is clogged and the overflow amount cannot be secured, the adjusting plate 2 overflows by the pedestal B or the like, as shown in the side sectional view of FIG. 3, for example. The overflow water c is discharged from the water receiving tank 6 by supporting it on the upper end opening 11 of the pipe 1 with a space therebetween, or by forming an overflow hole at the rising portion of the overflow pipe 1 (not shown). be able to.

[0009]

Since the present invention has the above-mentioned structure, it has the following effects. That is, according to the present invention, it is possible to easily cope with a change in the desired blowdown amount due to a change in the cooling load of the cooling tower, a change in the circulating water amount, or the like, simply by exchanging and adjusting the adjustment plate, which is extremely convenient. is there.

[Brief description of drawings]

FIG. 1 is a schematic side view of a cooling tower incorporating one embodiment of the present invention.

FIG. 2 is a side sectional view showing a blowdown state according to the present invention.

FIG. 3 is a side sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Overflow pipe 11 Upper end opening 2 Adjusting plate 21 Plate hole 22 Tsuba 3 Water conduit 4 Sprinkler tank

Claims (1)

[Claims] 1. In a blowdown device in which a lower end of a water conduit piped from a sprinkler tank of a cross-flow cooling tower is provided at an upper end opening of an overflow pipe, the blowdown device is detachably attached to an upper end opening of the overflow pipe. A blow-down device for a cooling tower, which is provided with an adjustment plate.