JPS6178497A - Method for purifying stagnated water in lakes and marshes by inflow of river water by siphon - Google Patents

Abstract

PURPOSE:To attain to purify water quality, by injecting water saturated with oxygen in lakes and marshes by a siphon. CONSTITUTION:Water 1 stored in a dam is sent to the bottoms of lakes and marshes by a syphon and thrown up toward the surface of water from jet orifices of the pipe 3 set to the bottoms of lakes and marshes. By this method, a convection is generated in water and water sent out from the siphon 2 is further moved to the bottoms of lakes and marshes because of the low temp. of water. As a result, the convection of water is performed in lakes and marshes and the purification of water quality advances.

Description

[Detailed Description of the Invention] In recent years, the water quality of rivers, swamps (including dams) and the sea has deteriorated significantly due to industrial wastewater and domestic water, causing bad odors to appear in the raw water and making it impossible for fish and shellfish to live there. It is in a state where there is no.

The reason for this is that in the case of rivers, the BOD is high mainly due to industrial wastewater, and when the water flow is low, almost stagnant, there is a lack of oxygen supply, resulting in an oxygen deficiency state.

At that point, methane gas (
CH4).

Ammonia (NH4+), sulfurized water sac (H7R) mercaptan, etc. are generated, producing a foul odor. In other words, it becomes a river of death. (2) The inflow of organic (N, P, etc.) domestic wastewater consumes dissolved oxygen in the water.

This also results in an anaerobic state.

In addition, in the case of stagnant lakes and sea areas, it is the same as in 11i11 rivers (inflow of natural or domestic wastewater containing a lot of organic matter such as N and P causes an oxygen deficiency state and generates a bad odor, but the decomposition of organic matter This state of high nutrient content is called eutrophication.

Nutrient salts cause abnormal growth of algae and algae (this is when sea red M occurs). Oxygen consumption in the water increases, resulting in an oxygen-deficient state, and tap water becomes foul-smelling, and seafood The kind will die.

(2) From autumn to winter, the water temperature near the surface of lakes and marshes cools due to the low temperature of the outside air.

Displacement with the warm water temperature part of the lake bottom, ie, a convection phenomenon (cooled, high-density water sinks, and warm, low-density water rises), equalizes dissolved IW elements in lake water, etc. However, from spring to summer, the water temperature near the water surface is higher than the water temperature at the lake bottom, so the phenomenon of displacement (convection) within the lake water does not occur. Therefore, water in the middle to lower layers, such as lake water, becomes oxygen-deficient. Even under this situation, CH4, N
H4+, H2S, etc. are generated and a bad odor is generated.

As can be seen from the above, the cause of deteriorating water quality in lakes and marshes is the lack of oxygen in the water caused by industrial wastewater, domestic wastewater, etc. Therefore.

Increasing the Do (dissolved amount of oxygen) in water in some way will lead to a solution to the problem.

Conventionally, the following methods have been implemented or planned in order to increase or equalize the Do (dissolved oxygen).

(1) Simple air lay-in method: This method involves arranging air tubes with air outlets installed at equal intervals on the bottom of a lake or marsh, and then using a compressor to release air through the air tubes and into the water from the air outlets. This is a method of measuring convection in lakes and marshes by forcibly increasing DO in the water or by using flow energy due to the density difference between air and water.

However, in this method, it is necessary to constantly send air at a pressure equivalent to the water pressure at the air outlet. Therefore, sending air requires a large amount of energy, which is uneconomical.

(2) Method of temporarily storing air in a container and releasing it all at once: This method involves installing a container as needed at the bottom of a lake or pond, attaching an air pipe, and then filling the container with air. .

Next, the mouth of the container is opened all at once to attempt to replace the water in lakes and marshes by convection. However, this method also requires a large amount of air and pressure to completely replace the water in lakes and marshes, and is very uneconomical. If a large amount of air is released into the water all at once, the water in lakes, marshes, etc. may be blown up several tens of meters above the surface of the water, or there may be a very loud explosion sound and vibration, causing great damage to the surrounding area. I can think of giving.

(3) Replacement method by pumping up pots: In this method, pots are lowered to near the bottom of a lake or pond.

This method involves pumping up water and discharging it onto the water surface to replace water in lakes, marshes, etc. In this case, a large number of pumps are required, and the equipment costs are high and the power source for operating the pumps is also large, making it uneconomical.

(4) Mechanical stirring method: There are generally two types of stirring methods. This method homogenizes water by stirring. [One method] is to homogenize the water quality by rotating a stirrer with the power of a motor or the like.

Regarding the former, since the released energy is used, it is very economical when considering the rotational energy of the turbine alone.

No effect of reducing the air supply force of the energy source can be expected. For the latter.

The energy needed to rotate the stirrer is necessary for art schools and is extremely wasteful.

The present invention applies to relatively small-scale lakes and marshes (including artificial lakes) and rivers with steep terrain and fast flow.

This is a method of purifying the water quality of lakes and marshes by injecting water saturated with oxygen from streams using a siphon.

In general, this is a very economical method of removing the sediment accumulated in the siphon pipe by operating the eductor pump with water introduced from the same water intake. . The present invention will be explained below with reference to the figures.

FIG. 1 is a conceptual diagram of this device. FIG. 2 is a sectional view of the water outlet and nib lid mechanism. FIG. 3 is a sectional view seen from the discharge port side.

fll dam izlb siphon pipe.

(3) is the discharge port, (4) is the water intake port and pump for the eductor, and (5) is the pipe for the eductor pump.

(6) is a part of the eductor, and (7) is the base or ground surface.

(8) is lake water, (9) the dam body (6-a) is the injection nozzle of the nib lid.

Lake water from dams, etc., especially in the summer, is helped by the influx of organic (N, P, etc.) domestic wastewater, and convection between the water surface and the lake bottom disappears, causing eutrophication.The main cause of this is oxygen in the water. consumption, i.e. lack of oxygen in the water. The water purification method of the present invention aims to purify water in lakes and marshes by sending the convection and oxygen-rich water through natural flow.

First, the water flowing down the rapid riverbed is Do (dissolved oxygen ff
1) is also common. Store that water in the dam in (1), and (2)
The water is sent to the lake bottom using a siphon and spouted up toward the water surface from the spout (3) of the pipe set on the lake bottom. In that case, the water sent from the siphon needs to have enough pressure and volume to reach the water surface. When this happens, convection occurs in the water due to the water spouted up from the lake bottom, and the temperature of the water sent out from the siphon (3) is low because it is water that has flowed through rapids, and due to the density difference in water temperature, the temperature of the water is low. move to.

Convection, or replacement, of the lake water takes place there as well, further promoting water purification.

Sediment accumulates in the siphon pipe (2), which is installed on the lakebed for a long time, and is pumped out by the eductor pump (6). First, the water accumulated in the dam (1) is sent to a part of the eductor (6) through the pipe (5) using a gravity siphon. In that case, the water pressure sent to the eductor is approximately 8 ky.
/d, so depending on the relative height difference between the dam and the lake water level in (1), it is necessary to use the pump in (4) to send water corresponding to the water pressure. The water sent through the eductor pipe (5) is injected conically from the injection nozzle (6-=) toward (t, -b). At that time, f'i negative pressure part (vacuum) is installed inside the bamboo cone or on the water intake side.
I can do it. Therefore, the force that satisfies the density of @pressure part is (2-
b) and the water in the pipe (2-b) flows at a very high velocity. At the same time, the earth and sand accumulated in the pipe (2-b) are also flowed out due to the flow velocity.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram of the device Figure 2 is a sectional view of the water outlet and eductor mechanism Figure 3 is a sectional view from the eductor outlet side (1) is the dam (2) is for the siphon The pipe (5) is the water intake port for the eductor, the pump (5) is the eductor, and the pump pipe (6) is a part of the eductor. Levee Body Procedure Ura Tadashi Yu Showa Year Month Day 2 Title of Invention: R in a siphon -> Method to dispute the water quality of swamps, etc., which were stagnant due to the inflow of irrigation water 3 Opening the door to the behind-the-scenes incident of stopping the oil Patent applicant Myakike/Isumi 7 nanokokui Su-no 1 main office
Nanko T32-10-42, Izumi-shi, Miyagi Prefecture
, to details 11) ”・
・6 Equivalence of amendment 1 Patent Law Enforcement Regulations Article 24 Form No. 16η11 Inadequate printing of type 4 in consideration 2 IF the brief explanation of the drawing has been clearly stated in the above 1,
The first page with the corrections made in 2 is attached as attached. Print the application and specification type as per the attached sheet. "The l'F surface that accurately describes the brief explanation of the drawing is defective.
1i1- of the drawing.
Please refer to the attached sheet (for further explanation).

Claims (2)

[Claims] (1) A water purification method in which oxygen-saturated water is injected into lakes, etc. using a siphon. (2) Method of discharging sediment accumulated in the siphon pipe using an eductor pump