JP4420750B2 - Oil-containing wastewater purification equipment - Google Patents

Description

The present invention relates to a simple device that efficiently purifies wastewater containing oil and solids.

Kitchen wastewater in small-scale establishments such as restaurants, fast food restaurants, restaurants, hotels, and food processing plants contain various water pollutants. If such wastewater is drained without any treatment, not only oil in the wastewater adheres to the drainage pipes, but also clogs and clogs, and it is difficult to purify water in the combined treatment tank and sewage treatment plant. In addition, it can adversely affect the environment and be subject to legal regulations, making it impossible to continue business.
Therefore, various methods and apparatuses for treating waste water containing solids such as oil, precipitates and suspended solids in units of discharge establishments have been proposed, and these techniques are roughly classified into two groups.
That is, the first group is a method and apparatus for decomposing oil in wastewater with microorganisms. However, in this method and apparatus, the oil decomposition rate is slow, so the decomposition efficiency is poor, and management of microorganisms must be taken into consideration, and complicated equipment is required.
The second group is a method and apparatus for physically removing oil in waste water by pooling waste water and pumping floating upper oil, or adsorbing and passing through an adsorbent. However, in this method and apparatus, malodors are generated from the waste water (pool), and the separation and removal of the oil are likely to be incomplete, and a large system and equipment are required.

  In response to the recent trend of society for environmental problems, there is a demand for an efficient and economical treatment technology that can be adopted in each of the small-scale establishments that drain oil-containing wastewater.

  The present invention provides a small-sized apparatus with a simple structure capable of efficiently transferring, removing, and purifying oil and precipitated waste from wastewater at a small-scale establishment that discharges oil-containing wastewater. Objective.

In order to achieve the above-mentioned object, the present invention is located at the bottom of the oil-containing wastewater storage tank, the sediment waste inlet and the water surface of the oil-containing wastewater storage tank with the opening surface positioned perpendicular to the bottom of the oil-containing wastewater storage tank. A suction pipe with a floating waste oil inlet with a baffle plate, an adsorption tank for floating waste oil and sediment waste, a pump, and an opening surface of the discharge port on the water surface in the oil-containing waste water storage tank is positioned perpendicular to the water surface Connecting the discharge pipe in this order, sucking the sediment waste in the oil-containing wastewater from the sediment waste inlet, sucking the floating waste oil in the oil-containing wastewater from the floating waste oil inlet, and passing through the suction pipe, the floating waste oil And an oil-containing wastewater purification device configured to adsorb sediment waste in an adsorption tank and discharge the wastewater through a pump and a discharge pipe through a discharge port, wherein the adsorption tank introduces the oil-containing wastewater. An oil-containing wastewater passage is provided in a covered container with a mouth and a discharge port. The sediment waste storage tank, the water flow adjustment cylinder disposed inside the precipitation waste storage tank, and the oil-containing waste water passage disposed above the water flow adjustment cylinder, the oil permeate but the oil adsorbent is The oil-containing wastewater purifier is an adsorption tank comprising an oil adsorption tank that is an oil adsorbent storage tank formed of a non-permeating wall surface .

Further, the present invention provides an oil-containing wastewater inlet and an oil-impregnated wastewater storage tank in which the opening surface is located directly opposite to the bottom surface of the oil-containing wastewater storage tank, and the oil-impregnated wastewater storage tank and the opening surface are diagonally opposed to the bottom surface of the oil-containing wastewater storage tank. A suction pipe with a waste water inlet, an adsorption tank for floating waste oil and precipitated waste, a pump, and a discharge pipe whose outlet surface is positioned perpendicular to the water surface in the oil-containing waste water storage tank. By connecting in this order, the floating waste oil and precipitated waste in the oil-containing wastewater are sucked from the oil-containing wastewater suction port, the floating waste oil and precipitated waste are adsorbed in the adsorption tank through the suction pipe, and the drainage is pumped and discharged from the pipe. The oil-containing wastewater purifying device is configured to be discharged from the discharge port, and the adsorption tank includes an oil-containing wastewater passage in a container with a lid having an oil-containing wastewater introduction port and a discharge port. Precipitation waste storage tank equipped with An oil adsorbent containing tank formed by a wall surface formed with a water flow adjusting cylinder and an oil-containing wastewater passage disposed on the upper side of the water flow adjusting cylinder. The oil-containing wastewater purifier is an adsorption tank comprising a tank .

  For the first time according to the present invention, it is possible to provide a small apparatus with a simple structure that efficiently transports, removes and purifies oil and precipitated waste from wastewater at a small-scale establishment that discharges oil-containing wastewater. became.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partially cutaway perspective view of an oil-containing wastewater purification device including an oil-containing wastewater transfer device according to a first embodiment of the present invention. FIG. 2 is a side sectional view of the adsorption tank in the first embodiment of the present invention. FIG. 3 is a perspective view of an oil adsorption tank in the adsorption tank of FIG. FIG. 4 is a perspective view of a water flow adjusting cylinder in the adsorption tank of FIG. FIG. 5 is a perspective view of a sediment waste storage tank in the adsorption tank of FIG.

  The oil-containing wastewater purification device including the oil-containing wastewater transfer device according to the first embodiment of the present invention shown in FIG. 1 includes a suction pipe 52 having a sediment waste inlet 56 and a floating waste oil inlet 57 with a baffle plate 58, This is a basic configuration in which an adsorption tank 53, a pump 54, and a discharge pipe 51 having a discharge port 55 are connected in this order to circulate and purify oil-containing wastewater. The oil-containing wastewater purification device including the oil-containing wastewater transfer device of the first embodiment is efficient and preferably used in the tank 200 in which the oil-containing wastewater having a deep water depth is stored.

The suction port 56 of the suction pipe 52 is a port for sucking the precipitated waste located at the bottom in the oil-containing wastewater storage tank 200, and the tip is a T-shaped both-end opening. The opening surface is perpendicular to the bottom surface.
The suction port 57 of the suction pipe 52 is a port for mainly sucking the waste oil floating on the water surface in the oil-containing wastewater storage tank 200, and the tip thereof is horizontally and directly above the water surface in the water surface of the oil-containing wastewater. A plate-shaped baffle plate 58 whose side surface is curved outwardly projects from a part of the upper end of the opening. The suction port 57 with the baffle plate 58 protrudes (in communication) with the side surface above the suction port 56 of the suction pipe 52.

  The discharge port 51 of the discharge pipe 51 is for pressurizing and discharging the drainage obtained by adsorbing and removing floating waste oil and precipitated waste from the oil-containing wastewater into the oil-containing wastewater storage tank 200. It is located near the water surface inside and has a T-shaped opening at both ends. The opening surface is perpendicular to the water surface.

  Therefore, the drainage discharged from the discharge port 55 through the discharge pipe 51 goes around the water surface in the oil-containing wastewater storage tank 200, hits a baffle plate 58 near the suction port 57, vortexes, and efficiently releases the floating waste oil from the suction port 57. And flows into the adsorption tank 53 through the suction pipe 52. At the same time, a rotating flow of the water surface of the drainage discharged from the discharge port 55 also generates a rotating flow in the bottom of the oil-containing wastewater storage tank 200, and flows around the bottom in the oil-containing wastewater storage tank 200 by this rotating flow. The sediment waste is efficiently sucked from the suction port 56 and flows into the adsorption tank 53 through the suction pipe 52.

The adsorption tank 53 is for adsorbing and removing floating waste oil and precipitation waste from waste water containing a large amount of floating waste oil and precipitation waste flowing in from the suction pipe 52.
The adsorption tank 53 has a basic structure in which an oil adsorption tank 2, a precipitation waste (solid content) storage tank 3, and a water flow adjusting cylinder 4 are arranged in a container 1 with a lid 5.

An oil-containing wastewater inlet 6 is provided at the center of the lid of the container 1 with the lid 5. An electromagnetic valve 13 is attached to the introduction port 6 so that air can be taken in from the outside.
Near the center of the bottom of the container, a discharge port 7 (for the adsorption tank 53) of waste water is provided. A joint 14 connected to the pump 54 by a screw is attached to the discharge port 7 (of the adsorption tank 53). The drainage discharge pipe 51 is connected to a pump 54, and the drainage is returned again to the oil-containing wastewater storage tank 200 by the pump 54.

The oil adsorption tank 2 is a metal mesh tank that contains the oil adsorbent 100, and the oil component passes through the wall surface of the metal mesh tank and is adsorbed by the oil adsorbent 100 in the tank.
Suitable oil adsorbents include, for example, natural fiber oil adsorbent absorbers W and GP (both flakes, pads, etc.) manufactured by Absorption.
A passage 12 having a side wall surface made of a wire mesh (oil-containing wastewater) is formed in a central portion that is perpendicular to the bottom of the oil adsorption tank 2. The oil-containing waste water flowing from the inlet 6 of the lid 5 is formed so that the oil-containing waste water passage 12 passes directly from the top to the bottom of the apparatus so that the oil adsorbent 100 of the oil adsorption tank 2 does not hinder the flow thereof. Has been.

  The sediment waste storage tank 3 is provided with a water flow hole 10 near the bottom center. Further, three legs 11 are provided on the outer bottom surface of the tank 3 in order to ensure stagnation of the water flow in the apparatus and to ensure circulation and circulation.

The water flow adjusting cylinder 4 is cylindrical, and three legs 8 are provided at the lower end thereof. When oil-containing wastewater is placed inside the sediment waste storage tank 3 and passed through the device, the water flow can enter and exit from the gap (between the legs 8) at the bottom of the cylinder, and it is a floating, sedimentary solid. (Precipitation waste) is collected in the precipitation waste storage tank 3 outside the water flow adjusting cylinder 4.
The water flow adjusting cylinder 4 is provided with four support portions 9 for installing the oil adsorption tank 2 on the upper end of the cylinder.

  The pump 54 recirculates the waste water from the waste water containing a large amount of floating waste oil and precipitated waste in the adsorption tank 53 through the discharge pipe 51 into the oil-containing waste water storage tank 200 again. Is for. That is, the pump 54 is connected to the adsorption tank 53 and the discharge pipe 51, and contains a large amount of floating waste oil and precipitated waste from the oil-containing wastewater storage tank 200 by reducing the pressure in the adsorption tank 53 (and the suction pipe 52). Waste water is sucked up, and at the same time, the inside of the discharge pipe 51 is pressurized and the waste water from which the suspended waste oil and the precipitated waste are substantially adsorbed and removed in the adsorption tank 53 is discharged from the discharge port 55 through the discharge pipe 51.

  Reference numeral 59 denotes a drain pipe of the oil-containing wastewater storage tank 200. Reference numeral 60 denotes a lid of the oil-containing wastewater storage tank 200. In order to make the inside of the oil-containing wastewater storage tank 200 easy to see, FIG. This lid is a combination of three lids so that it can be partially opened and closed. Reference numeral 61 denotes a stationary table on which the pump 54 is placed. 62 is a switch valve of the pump 54.

FIG. 6 is a partially cutaway perspective view of an apparatus for transferring oil-containing wastewater in the oil-containing wastewater purification apparatus according to the second embodiment of the present invention.
Apparatus for transferring oil-containing wastewater in the purification system of oil-containing wastewater of the second embodiment of the present invention shown in FIG. 6, adsorption vessel in purification system of oil-containing waste water including an apparatus for transferring the oil-containing wastewater of the first embodiment of FIG. 1 In the configuration excluding 53 and the pump 54, there is only one sediment waste suction port 56 of the suction pipe 52, and a floating waste oil suction port 57 with a baffle plate 58 is connected to this port, and This is a structure communicating with the suction pipe 52 in the middle (near the precipitation waste suction port 56) between the sediment waste suction port 56 and the floating waste oil suction port 57 with the baffle plate 58.
Apparatus for transferring oil-containing wastewater in the purification system of oil-containing wastewater of the second embodiment of the present invention shown in FIG. 6, connects the suction pipe 52 and the suction tank 53 and the pump 54 and the discharge pipe 51 in this order. Purification system of oil-containing wastewater of the second embodiment of the present invention can be used in preferred (efficient) in tank 200 which stores the shallow oil-containing wastewater of depth from purification system of oil-containing wastewater of the first embodiment.

FIG. 7 is a side sectional view of an apparatus for transferring oil-containing wastewater in the oil-containing wastewater purifying apparatus according to the third embodiment of the present invention. FIG. 8 is a plan view of an apparatus for transferring the oil- containing wastewater of FIG.
Apparatus for transferring oil-containing wastewater in the purification system of oil-containing wastewater of the third embodiment of the present invention shown in FIG. 7, adsorption vessel 53 in the purification system of oil-containing waste water comprising a transfer device for oil-containing wastewater of the first embodiment of FIG. 1 In the configuration excluding the pump 54, the suction pipe 52 is positioned at the bottom of the oil-containing wastewater storage tank 200, the oil-containing wastewater suction port 56a whose opening surface is directly opposite to the bottom surface, and the opening surface diagonally opposite the bottom surface. The oil-impregnated waste water suction port 56b is provided and communicates with the suction pipe 52 between the sediment waste suction ports 56a and 56b.
Apparatus for transferring oil-containing wastewater in the purification system of oil-containing wastewater of the third embodiment of the present invention shown in FIG. 7, connects the suction pipe 52 and the suction tank 53 and the pump 54 and the discharge pipe 51 in this order. When water-containing oil waste water reservoir 200 is shallow, so the tube leading from the oil-containing wastewater inlet 56a to the oil-containing wastewater inlet 56b is dam water flow flowing from the water surface near the discharge pipe 51 to the oil-containing wastewater storage tank 200 In addition, since the oil-containing wastewater suction port 56b is an opening surface inclined at an angle of about 60 degrees with respect to the bottom surface in the oil-containing wastewater storage tank 200, the oil-containing wastewater suction port 56a extends from the surface of the oil-containing wastewater storage tank 200. As a result, a vortex is generated toward the oil-containing wastewater suction port 56b, and waste oil and precipitated waste can be entrained and efficiently sucked. Therefore, purification system of oil-containing wastewater of the third embodiment of the present invention can be suitably used in tank 200 which stores further a shallow oil-containing wastewater of depth from purification system of oil-containing wastewater of the second embodiment.

FIG. 9 is a sectional side view of the adsorption tank in the third embodiment of the present invention.
This adsorption tank has a basic structure in which an oil adsorption tank 2 ′, a support member 16, a water flow adjusting cylinder 4 ′, and a sediment waste storage tank 3 are arranged in a container 1 with a lid 5.
In the oil adsorption tank 2 ', the shape of the oil-containing wastewater passage 12' is a wide-mouthed cup shape (with a bottom removed), and all the wall surfaces are provided with a number of holes by punching.
The support member 16 for the oil adsorbing tank 2 'has a structure in which two pipes having the same length are bent into a substantially U-shape, and two parallel ends are fastened with rubber rings. It opens in a V shape starting from both ends that are stopped, and an oil adsorption tank 2 'is placed on and supported by the upper end of the V shape.
The water flow adjusting cylinder 4 ′ is a cylinder having three legs 8 at the lower end, and in this embodiment, the support member 16 is used. Therefore, unlike the first embodiment, the oil adsorption tank 2 is used. The support part 9 for installing 'is not provided.
All other structures are the same as those in the first embodiment.

It is a partially cutaway perspective view of the purification apparatus for oil-containing wastewater according to the first embodiment of the present invention. It is a sectional side view of the adsorption tank in 1st Example of this invention. It is a perspective view of the oil adsorption tank in the adsorption tank of FIG. It is a perspective view of the water flow adjustment cylinder in the adsorption tank of FIG. It is a perspective view of the sediment waste storage tank in the adsorption tank of FIG. It is a partial notch perspective view of the apparatus which transfers the oil-containing wastewater in the purification apparatus of the oil-containing wastewater of 2nd Example of this invention. It is a cross-sectional side view of a device for transferring the oil-containing wastewater in the purification system of oil-containing wastewater of the third embodiment of the present invention. It is a top view of the apparatus which transfers the oil- containing wastewater of FIG. It is a sectional side view of the adsorption tank in 3rd Example of this invention.

51 Discharge pipe 52 Suction pipe 53 Adsorption tank 54 Pump 55 Discharge port 56, 56a, 56b Precipitation waste suction port 57 Floating waste oil suction port 58 Baffle plate 59 Drain pipe of oil-containing waste water storage tank 200 Oil-containing waste water storage tank 1 Container 2, 2 ′ Oil adsorption tank 3 Precipitation waste storage tank 4, 4 ′ Water flow adjustment cylinder 5 Lid 6 Oil-containing wastewater introduction port 7 Waste water discharge port (of oil adsorption tank) 8 Leg of water flow adjustment cylinder 9 Support part of water flow adjustment cylinder DESCRIPTION OF SYMBOLS 10 Flow hole of water flow 11 Leg part of sedimentation waste storage tank 12, 12 'Oil-impregnated waste water passage 13 Electromagnetic valve 14 Connection joint to discharge pipe 16 Support member of oil adsorption tank

Claims (2)

Suction with a sediment waste inlet with an opening at the bottom of the oil-containing wastewater storage tank perpendicular to the bottom of the oil-containing wastewater storage tank and a floating waste oil inlet with a baffle located at the water surface in the oil-containing wastewater storage tank A pipe, an adsorption tank for floating waste oil and sediment waste, a pump, and a discharge pipe in which the opening surface of the discharge port is positioned perpendicular to the water surface in the water surface in the oil-containing waste water storage tank are connected in this order, Precipitated waste in oil-containing wastewater is sucked from the precipitating waste suction port, floating waste oil in oil-containing wastewater is sucked from the floating waste oil suction port, and the waste waste oil and precipitating waste are adsorbed in the adsorption tank through the suction pipe. An oil-containing wastewater purification device configured to discharge wastewater from a discharge port via a pump and a discharge pipe,
The adsorbing tank is a container with a lid provided with an inlet and an outlet for oil-containing wastewater, a precipitation waste storage tank provided with a passage for oil-containing wastewater, and a water flow adjusting cylinder disposed inside the precipitation waste storage tank. And an oil adsorbing tank that is an oil adsorbent storage tank that is formed with a wall surface that includes an oil-containing wastewater passage disposed on the upper side of the water flow adjusting cylinder and that transmits oil but does not transmit oil adsorbent. The apparatus for purifying oil-containing wastewater, which is a tank. The oil-containing wastewater storage tank is equipped with an oil-containing wastewater suction port whose opening surface is located directly opposite to the bottom surface of the oil-containing wastewater storage tank and an oil-containing wastewater suction port whose opening surface is diagonally opposed to the bottom surface of the oil-containing wastewater storage tank. A suction pipe, an adsorbing tank for floating waste oil and sedimented waste, a pump, and a discharge pipe in which the opening surface of the outlet is positioned perpendicular to the water surface in the oil-containing waste water storage tank in this order. Floating waste oil and precipitated waste in the oil-containing wastewater are sucked from the oil-containing wastewater suction port, and the waste oil and precipitated waste are adsorbed in the adsorption tank through the suction pipe, and the wastewater passes through the pump and the discharge pipe. An oil-containing wastewater purification device configured to be discharged from
The adsorbing tank is a container with a lid provided with an inlet and an outlet for oil-containing wastewater, a precipitation waste storage tank provided with a passage for oil-containing wastewater, and a water flow adjusting cylinder disposed inside the precipitation waste storage tank. And an oil adsorbing tank that is an oil adsorbent storage tank that is formed with a wall surface that includes an oil-containing wastewater passage disposed on the upper side of the water flow adjusting cylinder and that transmits oil but does not transmit oil adsorbent. The apparatus for purifying oil-containing wastewater, which is a tank.

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