JP2023178930A - Waste water purification apparatus - Google Patents

Abstract

To provide a waste water purification apparatus where waste water in an oil/water tank can be efficiently agitated, noise is suppressed more than a conventional air blow type waste water purification apparatus and running cost can be drastically reduced in comparison with a waste water purification apparatus using an agent and the like.SOLUTION: In a waste water purification apparatus,: the end part of a metal pipe 7 in a water purification apparatus is connected to an air pump 600 installed at the outside of a waste water tank 700 with an air supply pipe 610; and air supplied from the air pump 600 is ejected in parallel with a side surface wall facing two nozzles at both of a side surface wall S1 and a side surface wall S2 so that air is ejected from each nozzle connected to the water purification apparatus toward only a pair of side surface walls (S1 and S2) facing the waste water tank 700.SELECTED DRAWING: Figure 4

Description

The present invention relates to a sewage purification device that utilizes air discharged from a plurality of pipes branched from an air blower.

The Water Pollution Control Law enacted in 1971 required certain workplaces to install grease traps, and in 1976 the Sewerage Law effectively required all commercial cooking facilities to install grease traps. A grease trap is a device that temporarily dams up and collects wastewater containing oil and fat from the kitchen.It is structurally divided into several blocks and is a device that gradually separates the oil and fat.

This management method requires either daily or periodic pumping out of the trapped oil or fat, or periodic cleaning by a professional, making maintenance difficult or requiring high maintenance costs.

Patent Document 1 discloses a wastewater treatment method in which wastewater from a grease trap is turned into a soapy liquid, in which the wastewater in the grease trap is pumped into the pump through a pumping hose connected to the pump by rotation of the pump. a step of sucking a liquid saponifying agent into the pump by rotating the pump while pumping up the waste liquid; and a step of pumping the waste liquid and the liquid saponifier by rotating the pump. The step of turning the waste liquid into a soapy liquid by stirring (stirring and mixing) in a pump, and the soapy liquid is pumped up by rotation of the pump, and is then passed through a discharge hose into the inside of the grease trap or into the grease trap. A grease trap wastewater treatment method has been proposed, which is characterized by comprising the steps of: discharging the wastewater to the outside of the grease trap;

Patent Document 2 discloses a grease trap purification device that uses ozone to decompose dirt accumulated in a grease trap and purify wastewater in the grease trap, and includes an air pump that sends air into the grease trap, and this air pump. an air supply pipe that is connected to the grease trap, is arranged along the inner peripheral edge of the bottom of the grease trap, and has a plurality of supply holes opened in the longitudinal direction; an ozone generator that sends ozone into the grease trap; an aeration pipe connected to the grease trap and surrounded by the air supply pipe; - the air supplied from the plurality of supply holes of the air supply pipe to the wastewater in the grease trap is connected to the grease trap; A sewage purification device, characterized in that the aeration pipe floats along the inner surface of the strap, supplies the ozone into the wastewater, and aerates the waste collected at the center of the upper surface of the wastewater with the air.

Patent Document 3 discloses that in a drainage basin in a grease trap, one or more aeration pipes are provided at a depth of approximately 10 cm from the liquid level, a plurality of air supply holes are provided in the pipes, and these aeration pipes are provided with a plurality of air supply holes. is an air supply device for a drainage puddle in a grease trap, which is characterized by supplying air from an external air pump and supplying air from the air supply hole into the liquid in the drainage puddle, or a drainage puddle in a grease trap. In the reservoir, a support is provided approximately in the center of the drainage reservoir, and a flow pipe is provided in the horizontal direction below the support at a depth of approximately 10 cm from the liquid level, with one end of the flow pipe extending upward. The other end is provided to open laterally, and an air pipe is disposed within the flow pipe, and air is supplied to the air pipe from an air pump, and the liquid is discharged from the mouth end of the air pipe. This is an air supply device for a drainage puddle in a grease trap, characterized in that the air supply hole of the aeration pipe is provided in a direction horizontal to the liquid level in both air supply devices. A sewage purification device for a sump in a strap has been proposed.

In Patent Document 1, the waste liquid from the grease trap is collected by a waste liquid pump, and at the same time, it is saponified in liquid form using a chemical injection device, which not only increases the cost of the device and causes problems in installation space, but also causes problems in running costs due to the chemical injection cost. be. The same applies to Patent Document 2, which requires an ozone generator in addition to an air pump, which not only increases the cost of introduction but also raises the problem of the running cost of the ozone generator. On the other hand, Patent Document 3 is a simple device that supplies air into the sewage tank using an air pump, so it is possible to reduce the cost of installing the device, but the direction in which air is supplied into the tank is parallel to the liquid level. Therefore, in order to efficiently separate oil and water from wastewater containing a large amount of oil and fat, it is necessary to increase the displacement of the air pump, which increases costs and causes problems with noise during pump operation.

In view of the above problems, the inventor made a sincere effort to ventilate the air supplied from the air delivery device to the main pipe, branch the main pipe into a plurality of pipes in the water tank, and connect a pair of facing pipes in the water tank. We propose a sewage purification device that discharges air perpendicularly or diagonally upward to the side wall surface.

A sewage purification device characterized in that waves are generated between a pair of facing side walls in the water tank, and the waves traveling from both wall sides between the pair of side walls collide at the center of the water surface in the water tank. be.

According to the sewage purification device of the present invention, it is possible to efficiently agitate the sewage in the oil water tank, and the air pump can be made smaller than the conventional air blowing type sewage purification device, which reduces noise. Running costs can be significantly reduced compared to sewage purification equipment that uses

It is a basic structure of the sewage purification apparatus which is this invention, and (a) shows a top view. (b) Shows an external view seen from direction A. (c) Shows an external view seen from direction B. It is a basic structure of the sewage purification apparatus by other embodiment which is this invention, and shows a top view. (b) Shows an external view seen from direction B. A top view showing the basic configuration of the sewage purification device of the present invention is shown. This is a wave collision phenomenon between a pair of facing side walls in the sewage purification apparatus of the present invention, and (a) shows a situation where the waves reach their maximum height near the side walls. (b) Shows the collision of waves at the center of the sewage tank.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1(a) is a top view of a sewage purification device (500) that is an embodiment of the present invention. A metal T-shaped joint (1) connects metal piping (50) cut to a predetermined length in a straight line, and the other end of the piping (50) is connected to a metal T-shaped joint. It is connected to the joint port corresponding to the vertical part of (10). A T-shaped joint (11) is linearly connected to the remaining two joint ports of the T-shaped joint (10) via metal piping cut to a predetermined length. One joint opening of the T-shaped joint (11) is connected via a metal pipe to an L-shaped joint (20) having a metal nozzle (100) on one side, and the T-shaped joint (11) The other joint opening of the joint (11) has an L-shaped joint (22) with a metal nozzle (101) at its tip and an L-shaped joint (21) connected via metal piping. Connected to the joint port.

FIG. 1(b) shows the external structure of the sewage purification device (500) observed from direction A in FIG. 1(a), and FIG. 1(C) shows the external structure of the sewage purification device (500) observed from direction B. shows. The metal nozzle (100) is installed at the bottom of the sewage purification device (500), and the metal nozzle (101) is installed at a higher position than the metal nozzle (100). Each nozzle is installed in such a way that air is ejected horizontally or slightly tilted upward relative to the bottom surface of the sewage tank when installed in the sewage tank.

FIG. 2(a) is a top view showing another embodiment, in which a metal nozzle (102) is installed at the tip instead of the L-shaped joint (21) in the sewage purification apparatus (500) shown in FIG. ) The exterior structure of the sewage purification device (510) is shown connected to the joint port of the T-shaped joint (12) which is connected via metal piping to the L-shaped joint (23). FIG. 2(b) shows the external structure of the sewage purification device (510) observed from direction B.

The metal nozzle (102) is installed at the same height as the metal nozzle (100), and when installed in the sewage tank, it is horizontal or slightly tilted upward with respect to the bottom of the sewage tank. The metal nozzle (100) and the metal nozzle (101) are installed in a direction perpendicular to the air jet direction.

When the water depth of the sewage tank is deep, as shown in FIG. It is connected to the sewage purification apparatus (500) in which a cross-shaped joint (30) is used instead of the letter-shaped joint (1).

FIG. 4 shows a state in which the water purification device (510) of the present invention is installed in a sewage tank (700) and covered with a lid (710). The end of the metal pipe (7) of the water purification device (510) is connected to an air pump (600) installed outside the sewage tank (700) through an air supply pipe (610). The air supplied from the air pump (600) is directed from each nozzle connected to the water purification device (510) only toward the pair of facing side walls (S1 and S2) of the sewage tank (700). gush out. Although not shown, two nozzles (102) face both the side wall (S1) and the side wall (S2) and eject air in parallel to the side wall.

The sewage in the sewage tank (700) is pushed out toward the side walls (S1 and S2) by the air ejected from each nozzle, so that the side wall (S1) and the side wall (S2) The water level on the surface of the wastewater rises. Thereafter, as shown in FIG. 4(b), the raised sewage forms waves, which advance toward the center of the sewage surface of the sewage tank (700) and collide with each other.

In reality, we installed it in a grease trap tank where grease had accumulated, adjusted the nozzle angle and air supply amount to create the conditions that would cause the waving phenomenon, and checked the oil situation. I checked the situation as it was being disassembled.

The water swept away by the air ejected from the nozzle (101) collides with the side wall, and in addition to the water flow that rises against the side wall, the water flow is also dispersed in the horizontal direction. The water collides with the air ejected from the nozzle (102) and causes the water flow to rise along the side wall, so the lateral water flow dispersion by the nozzle (101) is suppressed, and as a result, the water flow rises and pushes up the water surface. It is presumed that waves are generated more efficiently.

Note that the specific configuration of the metal tube according to the present invention is not limited to that described in the embodiments, and can be changed without departing from the gist of the invention. For example, the number of nozzles and the length of piping may be changed depending on the volume (size) of the sewage tank to find the conditions that cause the waving phenomenon. Further, in the case of a cylindrical water tank, it is possible to have a polygonal structure of pentagon or more so that a plurality of nozzles blow out air perpendicularly or obliquely upward to the cylindrical side surface.

The sewage purification device of the present invention can be installed not only in a grease trap tank but also in an underground water storage pit.

1 Metal T-shaped joint 7 Metal piping 10 Metal T-shaped joint 11 Metal T-shaped joint 20 Metal L-shaped joint 21 Metal L-shaped joint 22 Metal L Shape joint 23 Metal L-shape joint 30 Metal cross-shape joint 50 Metal piping 100 Metal nozzle 101 Metal nozzle 102 Metal nozzle 600 Air pump 610 Air supply pipe 700 Sewage tank 710 Lid of the sewage tank S1 One of the pair of facing side walls of the sewage tank S2 The other side of the pair of facing side walls of the sewage tank W1 Situation where waves of maximum height occur near the side walls W2 Waves at the center of the water surface in the sewage tank situation where there was a collision

Claims (4)

It consists of an air sending device, a main pipe that ventilates the air supplied from the air sending device, and a plurality of pipes branched from the main pipe, and the plurality of branched pipes are installed in an aquarium and are arranged on opposite sides of the water tank. A sewage purification device that blows air from the plurality of branched pipes in the direction of a pair of side walls. The sewage purification device according to claim 1, wherein the plurality of branched pipes are attached to a pair of opposing side wall surfaces in the water tank so as to blow out air vertically or diagonally upward. The sewage purification device according to claim 1, wherein a part of the plurality of branched pipes is installed horizontally to the side wall surface so that the air outlet of the pipe faces the side wall surface. The sewage purification device according to claim 1, wherein waves are generated between a pair of facing side walls in the water tank, and waves traveling from both sides of the matching side walls collide at the center of the water surface in the water tank.