JPS63151707A - Interruption of floating substance in intake port - Google Patents

Abstract

PURPOSE:To prevent the inflow of floating substances into intake port by a method in which vertical streams are forcibly generated from the bottom under water at a given interval in front of the intake port. CONSTITUTION:An intake port 3 is provided in water in a revetment 1, and intermittent-type pneumatic water cylinders 4 are set vertically in front of the intake port 3. Air is supplied to the cylinders 4 from a compressor on the ground's surface and the air is intermittently discharged, where water convection R are generated in water by the jet energy of the air to prevent the inflow of floating substances into the intake port 3.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention mainly relates to cooling water intake at nuclear power plants, etc.
The present invention relates to a method for blocking suspended solids at a water intake, which prevents suspended solids such as jellyfish, seafood, and garbage in seawater from flowing into the water intake.

[Prior art]

At water intake facilities such as nuclear power plants installed on the coast, jellyfish, fish and shellfish, garbage, etc. floating in the intake water area pass through the water intake and are taken into the cooling water, causing problems that reduce power generation output. There are many places.

In addition to taking useful seafood eggs and fry into the water intake,
In rare cases, it may affect seafood.゛Therefore, in order to prevent the above-mentioned suspended solids from flowing into the water intake, from the bottom of the water on the slope extension of the umbrella-shaped cover attached to the upper end of the water intake pipe connected to equipment on land via the bottom pipe, JP-A-57-1655 relates to a water intake device that injects water toward the vicinity of the upper surface of an umbrella slope from injection nozzles provided at equal intervals on a circle surrounding a water intake pipe
No. 14 inventions have been made, but in this case, there was a problem in that a considerable amount of suspended solids passed between each injection nozzle and flowed into the water intake.

On the other hand, it relates to an air jet type sewage purification device in which an air chamber shaped like an inverted container is provided at the bottom of a hollow cylinder installed almost vertically in water, and the air in the air chamber is explosively injected upward intermittently by siphon action. Tokuko Showa 42-5795
The invention was made by focusing on the principle of intermittent air pumping, which aims to purify water by generating convection in the water by injecting air jets intermittently. is the present invention.

[Purpose of the invention]

The present invention was made in order to solve the above-mentioned conventional problems, and by installing intermittent air pumping cylinders at predetermined intervals in front of the water intake and generating a forced vertical flow, floating The purpose is to prevent substances from flowing into the water intake.

[Structure of the invention]

In order to achieve the above object, the method of blocking suspended solids at a water intake according to the present invention is to prevent suspended solids from entering the water from the bottom of the water at predetermined intervals in front of the water intake connected to equipment on land via pipes installed at the bottom of the water. It is constructed by installing a device such as an intermittent air pump that can generate a forced vertical flow intermittently. It is characterized by generating convection to prevent suspended solids from flowing into the water intake, and in this case, a horizontal water jet flow or air jet flow is also generated in front of the water intake. is the preferred configuration.

〔Example〕

Examples to which the method of the present invention is applied will be described below with reference to the drawings, and in each example, the same parts are indicated by the same part numbers.

First, in Embodiment 1 of FIG. 1, a water intake 3 is provided to supply cooling water to a cooling device on land (not shown) connected from a seawall 1 via a waterway or the like provided underwater. In front of the water intake port 3, a plurality of intermittent air water pumps 4 are vertically installed at predetermined intervals.

In this way, air is sent from an air supply source such as a ground-based compressor to the intermittent air pumping tubes 4 provided at predetermined intervals, and the air is accumulated therein, and the air is intermittently pushed out. The air rapidly rises to the surface, and the ejected energy causes a vertical jet action to generate convection in the water.
It is also possible to use an air jet type sewage purification device as shown in the invention of .

That is, convection R is generated in front of the water intake port 3 due to the vertical jet flow accompanying the operation of the intermittent air pumping cylinder,
A flow as shown by arrow F in Figure 1 is formed, and the water intake 3
The inflow of suspended solids into the interior is prevented.

Next, in the second embodiment shown in FIGS. 2-A and 2-B, intermittent air pumping tubes 4 are installed at predetermined distances in front of the water intake 3, which has the same shape as the first embodiment shown in FIG. In addition to this, a water jet device 5 that generates a water jet flow J in the horizontal direction is also provided in combination.
It is possible to more completely prevent floating substances from flowing into the water intake port 3 from the lower layer provided with the structure.

Note that this water jet device 5 uses a water jet flow J
In addition to those that generate air jets, a device that can generate air jets may also be installed horizontally.

Furthermore, in Embodiment 3 shown in Figures 3-A and 3-B, the present invention is applied when the water intake 3 is located on the circumferential surface of a cylinder. Intermittent air pumping tubes 4 are provided vertically on the circumferential surface at predetermined intervals, and a horizontal water jet generator 5 is also provided in combination.
It has the same functions as the second embodiment.

[Effects of the Invention] As explained above, if the method for blocking suspended solids in a water intake according to the present invention is adopted, the suspended solids that were conventionally taken into the water intake can be removed by the vertical flow caused by the operation of the intermittent air pump. Inflow can be prevented, and conventional water intake facilities can be simplified as a result of this inflow prevention.

Furthermore, if the above-mentioned intermittent air pumping tube is used in combination with a device capable of generating a horizontal water jet flow or an air jet flow, it is possible to more completely prevent suspended solids from flowing into the water intake.

[Brief explanation of the drawing]

Each drawing shows an embodiment of a water intake using the suspended solids blocking method for a water intake according to the present invention, and FIG. The figure is a schematic perspective view of Embodiment 2, 2-B is a plan view of 2-A, 3-A is a side view of Embodiment 3, and 3-B is 3-A. FIG. 3...Water intake, 4...Intermittent air pumping cylinder, 5...
water jet device.

Claims (1)

[Claims] 1. A method for blocking suspended solids at a water intake, which intermittently generates a forced vertical flow from the bottom of the water at predetermined intervals in front of the water intake connected to equipment on land. 2. A system according to claim 1, in which a horizontal water jet flow or air jet flow is generated in front of the water intake port, which intermittently generates a forced vertical flow from the bottom of the water at regular intervals. How to cut off suspended solids at a water intake.