KR100718730B1 - Apparatus and method for producing refined oil from garbage waste water - Google Patents

Abstract

Disclosed is a method for extracting refined oil from wastewater of food waste which can extract refined oil which can be recycled from wastewater generated in the processing of various food wastes.

Such a method of extracting refined oil from wastewater of food waste includes a first heating step of heating the wastewater of food waste with steam heat, and separating the large particles of solid sludge contained in the wastewater to remove large particles of solid sludge from the wastewater. A first purifying step of obtaining a first purifying liquid, a second heating step of heating the first purifying liquid with steam heat, and solid sludge of the fine particles contained in the first purifying liquid to separate from the first purifying liquid A second purifying step of obtaining a second purifying liquid from which solid sludge of the fine particles is removed, a third heating step of heating the second purifying liquid with steam heat, and separating an oily substance contained in the second purifying liquid A third purifying step of obtaining a third purifying liquid of an oily substance from the purifying liquid; and precipitating and separating the remaining waste water contained in the third purifying liquid into the third purifying liquid From the fourth purification step of extracting the refined oil of the oily substance.

Food waste wastewater, hardly degradable oily substances, extraction of refined oil from wastewater, additives for heating oil and detergent manufacturing, additional benefits from recycling, improved wastewater treatment efficiency, prevention of environmental pollution

Description

Apparatus and method for producing refined oil from garbage waste water}

1 is a view schematically showing the overall structure of an apparatus for extracting refined oil from wastewater of food waste according to an embodiment of the present invention.

2 is a process chart showing step by step the operation process of the method for extracting refined oil from waste water of food waste according to an embodiment of the present invention.

The present invention relates to an apparatus and a method for extracting refined oil from wastewater of food waste, and more particularly, to waste food wastewater capable of extracting refinable oil that can be recycled from wastewater generated during processing of food waste. An apparatus and method for extracting refined oil from

In general, the food waste collected from each home or business is recycled as organic fertilizer or compost by incineration, landfilling, drying and fermentation in the state of removing moisture contained in the solid after a predetermined treatment process.

In addition, as a method of treating wastewater generated in the process of treating food waste as described above, a method of purifying the wastewater by removing the sludge from the ocean dumping directly on the high seas using a vessel or using a conventional wastewater treatment facility. This is known.

However, the waste water of food waste contains a large amount of oil components generated from fish, meat, and various emulsions, and if the oil dumping or purification treatment is carried out as described above without removing the oil components, May cause

First, the oily substances contained in the waste water dumped on the high seas can cause a serious problem of causing various environmental pollution and destroying the ecosystem of the sea.

In particular, since the oily substance contained in the waste water is composed of hardly decomposed components, it is not easily decomposed, and thus, it is difficult to obtain satisfactory purity when the wastewater treatment facility is used for purification.

In addition, the oily substance has a high viscosity, which can easily stick to inner walls of various tanks or pipes of the wastewater treatment plant and cause a load during wastewater treatment, thereby reducing the treatment capacity of the wastewater and the efficiency of the plant. It can be a factor.

In addition, if the oily substance clings to the fluid tank or the tubular body during the wastewater treatment, it is necessary to periodically remove it, which requires excessive cost and time for maintenance.

Therefore, if the oily substance contained in the wastewater is not removed prior to the wastewater treatment, the above problems are caused, resulting in many difficulties in the wastewater treatment.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to easily separate the oily substances contained in the wastewater before the water treatment of wastewater generated from food waste, in particular separated oily substances The present invention provides an apparatus and method for extracting refined oil from wastewater of food waste which can extract refined oil which can be recycled from.

In order to realize the object of the present invention as described above,

A first heating unit for heating waste water of food waste with steam heat in the heating tank;

A first separation part for separating and removing the large particles of solid sludge contained in the wastewater of the first heating part by using a separator to obtain a first purification liquid from which the large particles of solid sludge have been removed from the waste water;

A second heating unit for heating the first purification liquid of the first separation unit with steam heat in a heating tank;

A second separator for separating and removing the solid sludge of the fine particles contained in the first purified liquid of the second heating unit to obtain a second purified liquid from which the solid sludge of the fine particles is removed from the first purified liquid;

A third heating unit for heating the second purification liquid of the second separation unit with steam heat in the heating tank;

A third separation unit for separating the oily substance contained in the second purification liquid of the third heating unit with a separator to obtain a third purification liquid of the oily substance from the second purification liquid;

Precipitating unit for extracting the refined oil of the oil material from the third purification liquid by sedimentation and separation of the remaining waste water contained in the third purification liquid of the third separation unit in the precipitation tank;

It provides an apparatus for extracting refined oil from waste water of food waste comprising a.

And in order to realize the above another object of the present invention,

A first heating step of heating the wastewater of the food waste with steam heat;

A first purifying step of separating the large sludge of solid particles contained in the wastewater to obtain a first purification liquid from which the large sludge of solid particles is removed from the waste water;

A second heating step of heating the first purification liquid with steam heat;

A second purification step of separating the solid sludge of the fine particles contained in the first purification liquid to obtain a second purification liquid from which the solid sludge of the fine particles is removed from the first purification liquid;

A third heating step of heating the second purification liquid with steam heat;

A third purification step of separating the oily substance contained in the second purification liquid to obtain a third purification liquid of the oily substance from the second purification liquid;

A fourth purification step of extracting refined oil of oily substance from the third purification liquid by precipitating and separating the residual wastewater contained in the third purification liquid;

It provides a method for extracting refined oil from waste water of food waste comprising a.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention are described to the extent that those of ordinary skill in the art can practice the present invention.

Therefore, since the embodiments of the present invention can be modified in many different forms, the claims of the present invention are not limited to the embodiments described below.

1 is a view schematically showing the overall structure of an apparatus for extracting refined oil from wastewater of food waste according to an embodiment of the present invention.

And, Figure 2 is a process diagram showing a step-by-step operation process of the method for extracting refined oil from the waste water of food waste according to an embodiment of the present invention, S1 denotes a first heating step.

In order to proceed with the first heating step (S1), first the waste water (W, hereinafter referred to as "waste water") of food waste contained in the waste water storage tank (T1) as shown in Figure 1 first heating tank (T2) To supply.

A wastewater supply pipe L1 is connected between the wastewater storage tank T1 and the first heating tank T2, and the wastewater supply pipe is pumped by a normal fluid pump P1 installed at one side of the wastewater supply pipe L1. Waste water W may be supplied to the first heating tank T2 through L1.

In addition, the wastewater W contained in the wastewater storage tank T1 is generated in a process of treating the collected food waste by a conventional method, and includes hardly degradable oily substances and various solid sludges.

The first heating tank T2 may have a cylindrical or polygonal tank having a heating space therein.

The first heating tank (T2) is connected to a separate steam supply device (M) and the first steam supply pipe (M1) as shown in Figure 1 waste water (heating) by the heating method by the heat of the first steam supply pipe (M1) W) heating is made possible.

The steam supply device (M) is made of a conventional steam boiler structure to generate a high temperature / high pressure steam while heating the water.

The first steam supply pipe M1 is piped in a conventional manner along the inner circumference of the tank although not shown in the drawing so as to heat the inner space of the first heating tank T2. Thus, by heating the outer surface of the tube by steam heat, the temperature of the wastewater W can be heated to 60 degrees Celsius or more.

The heating temperature of the waste water (W) can be appropriately adjusted according to the steam temperature supplied from the steam supply device (M).

When the wastewater (W) is heated in the first heating tank (T2) as described above, the viscosity can be lowered, so that the separation efficiency of the various solid sludges contained in the wastewater (W) during the separation operation described later can be improved.

When the heating operation is completed, the first purification step (S2) proceeds to the next process.

In this refining operation, a first separator T3 connected to the first heating tank T2 and the first supply pipe L2 is used as shown in FIG. 1.

Although not shown in the drawing, the first separator T3 is provided with a conventional screw decanter separator structure capable of filtering various solid sludges contained in the liquid by a pressing force caused by the rotation of the screw. .

The first purification step S2 is performed by filtering solid sludge Q1 having a particle size of 0.1 mm or more among the solid sludge contained in the waste water W by the normal driving of the first separator T3. do.

Thus, by the separation operation using the first separator T3, the first purification liquid W1 from which the large-sized solid sludge Q1 is separated and removed from the wastewater W can be obtained.

The solid sludge Q1 filtered through the separation operation is discharged to the outside of the first separator T3 and is transported along the conveying conveyor C as shown in FIG. 1 while the solid sludge storage tank B is disposed. It is collected at.

The transfer conveyor (C) may be used any one of a conventional belt conveyor or screw conveyor.

When the refining operation is completed, the second heating step S3 is performed by using the second heating tank T4 connected to the first separator T3 and the second supply pipe L3.

A normal fluid pump P2 is installed in the second supply pipe L3 to supply the first purification liquid W1 to the second heating tank T4 by pumping.

This heating operation, the second steam supply pipe (M2) is connected between the second heating tank (T4) and the steam supply device (M), the second steam supply pipe (M2) in the second heating tank (T4). The first purification liquid W1 is heated by heating the outer surface of the substrate.

The second heating tank T4 is operated by the second steam supply pipe M2 to heat the temperature of the first purification liquid W1 to 60 degrees Celsius or more.

When the heating operation is completed, the second purification step S4 is performed by using the second separator T5 connected to the second heating tank T4 and the third supply pipe L4.

The first purification liquid W1 is supplied to the second separator T5 in such a manner as to naturally fall through the third supply pipe L4.

The second separator T5 has a conventional abnormal separator structure. Thus, the second purification step (S4) is performed in a normal abnormal separation method by driving the second separator (T5).

By such an abnormal separation operation, the solid sludge Q2 of the fine particles having a particle size of 0.1 mm or less can be separated from the solid sludge contained in the first purification liquid W1.

The solid sludge Q2 of the fine particles filtered by the refining operation is discharged to the outside and collected in the solid sludge storage tank B while being transported along the conveying conveyor C as shown in FIG. 1.

As described above, the second purification liquid W2 in which the solid sludge Q2 of the fine particles is filtered from the first purification liquid W1 may be obtained while the abnormal separation operation using the second separator T5 is performed.

When the refining operation is completed, a third heating step S5 is performed using the third heating tank T6 connected to the second separator T5 and the fourth supply pipe L5.

A normal fluid pump P3 is installed in the fourth supply pipe L5 to supply the second purification liquid W2 to the third heating tank T6 by pumping.

This heating operation, the third steam supply pipe (M3) is connected between the third heating tank (T6) and the steam supply device (M), the third steam supply pipe (M3) in the third heating tank (T6). The second purification liquid W2 is heated by heating the outer surface of the substrate.

The third heating tank T6 is operated such that the temperature of the second refining liquid W2 is heated to 60 degrees Celsius or more by the third steam supply pipe M3.

When the heating operation is completed as described above, the third purification step (S6) is performed using the third separator (T7).

The second purification liquid W2 is supplied to the third separator T7 side in a natural dropping manner through a fifth supply pipe L6 connected between the third heating tank T6 and the third separator T7. do.

In addition, the third separator T7 has a conventional three-phase separator structure, and the third purification step S6 is performed in a conventional three-phase separation method by driving the third separator T7.

Thus, the third purification liquid W3 of the oily substance is separated from the second purification liquid W2 and the waste water W3-1 containing no oily substance and the solid sludge Q3 of the remaining fine particles are separated. Each can be separated by screening.

The solid sludge (Q3) of the remaining fine particles separated during the purification operation is collected in the solid sludge storage tank (B) by the transfer conveyor (C).

Then, the waste water (W3-1) is supplied and stored to the treated water storage tank (T8) through the first drain pipe (L7) connected to the third separator (T7) as shown in FIG.

Meanwhile, the third purification liquid W3 of the oily substance obtained from the second purification liquid W2 is supplied to the precipitation tank T9 to proceed with the fourth purification step S7.

This refining operation is for separating the residual waste water W3-2 contained in the oily substance which is the main component of the third refining liquid W3 by the precipitation method.

The third purification liquid W3 is supplied to the pumping pump P4 through a sixth supply pipe L8 connected between the third separator T7 and the precipitation tank T9.

And, the precipitation tank (T9) is connected to the steam supply device (M) to the fourth steam supply pipe (M4) as shown in FIG. Although not shown in the figure, the fourth steam supply pipe M4 is piped along the inner circumference of the settling tank T9.

The settling tank T9 heats the third refining liquid W3 by heat generation of the outer surface of the fourth steam supply pipe M4 to allow the settling operation in a state where the temperature is 60 degrees Celsius or more.

As such, when the precipitation operation is performed while the third purification liquid W3 is heated to a predetermined temperature or more, the viscosity of the third purification liquid W3 may be lowered, thereby further increasing precipitation efficiency.

Therefore, when the sedimentation operation is performed in the heating atmosphere using the sedimentation tank T9, the oily substance, which is the main component of the third refining liquid W3, is suspended, and the remaining waste water W3-2 is settled downward. Easily separated in a sinking state.

The separated residual waste water (W3-2) is supplied to the treated water storage tank (T8) through the second drain pipe (L9) connected to the settling tank (T9) or stored in addition to any one of the above working steps It can be reprocessed by reloading into.

Therefore, the purified oil W4 of the oily substance may be extracted from the third purification liquid W3 by the precipitation separation method while passing through the fourth purification step S7.

The refined oil W4 contained in the settling tank T9 is supplied and stored in the refined oil storage tank T10 through the seventh supply pipe L10 as shown in FIG. 1.

Therefore, refined oil W4 that can be recycled can be obtained by extracting an oily substance from the wastewater W of food waste while going through each of the above working steps. The refined oil W4 of such an oily substance can be used, for example as a raw material for heating, the additive raw material for various detergent manufacture, etc.

The waste water W3-1 and the remaining waste water W3-2 contained in the treated water storage tank T8 are supplied to be treated in a conventional manner in a wastewater treatment plant of food waste, although not shown in the drawing.

In particular, if the non-degradable oil component is supplied to the wastewater treatment plant in a removed state, it is possible to solve problems that may be caused by the hardly decomposable oil component during the water treatment operation.

In addition, the pipes L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 connected between the devices for performing the respective working steps include a conventional regulating valve ( V) and temporary storage tank (D) can be installed.

The regulating valve (V) and the temporary storage tank (D) serves to control the fluid flow or to allow the temporary storage of the fluid in accordance with the working environment.

In addition, the separators and tanks T1, T2, T3, T4, T5, T6, T7, T8, T9, and T10 for each of the above working steps are adapted to meet the required processing capacity in addition to the structure shown in FIG. Alternatively, a plurality of dogs may be arranged in a pair.

As described above, the present invention extracts the hardly decomposable oily substances contained in the wastewater through various stages of purification such as heating and separating and sedimentation of the wastewater generated in the process of treating food waste, thereby heating raw materials or various The refined oil which can be used as an additive for manufacturing detergent can be obtained.

Therefore, the present invention can extract the refined oil from the waste water of the food waste, thereby creating an additional benefit and energy replacement effect.

In addition, since it is possible to treat the food waste in the state in which the oily substance has been removed, for example, it can contribute to improving the purification power and treatment efficiency during the waste water treatment of the food waste.

Claims (14)

A first heating step of heating the wastewater of the food waste with steam heat; A first purifying step of separating the large sludge of solid particles contained in the wastewater to obtain a first purification liquid from which the large sludge of solid particles is removed from the waste water; A second heating step of heating the first purification liquid with steam heat; A second purification step of separating the solid sludge of the fine particles contained in the first purification liquid to obtain a second purification liquid from which the solid sludge of the fine particles is removed from the first purification liquid; A third heating step of heating the second purification liquid with steam heat; A third purification step of separating the oily substance contained in the second purification liquid to obtain a third purification liquid of the oily substance from the second purification liquid; A fourth purification step of extracting refined oil of oily substance from the third purification liquid by precipitating and separating the residual wastewater contained in the third purification liquid; Method of extracting refined oil from wastewater of food waste comprising a. The method according to claim 1,  The first heating step, Method for extracting refined oil from the waste water of food waste, characterized in that for heating so that the temperature of the waste water is more than 60 degrees Celsius. The method according to claim 1, The first purification step, A method for extracting refined oil from wastewater of food waste, characterized in that the solid sludge having a particle size of 0.1 mm or more is removed from the wastewater among the solid sludge contained in the wastewater. The method according to claim 1, The second purification step, A method of extracting refined oil from wastewater of food waste, characterized in that the solid sludge having a particle size of 0.1 mm or less is separated from the first purified liquid among the solid sludge contained in the first purified liquid. The method according to claim 1, The second heating step, Method for extracting refined oil from the waste water of food waste, characterized in that the heating of the first purification liquid so that the temperature of 60 degrees Celsius or more. The method according to claim 1, The third heating step, Method for extracting refined oil from the waste water of food waste, characterized in that the heating of the second purification liquid so that the temperature of 60 degrees Celsius or more. The method according to claim 1, The fourth purification step, Refining oil from the waste water of food waste, characterized in that for extracting the refined oil of the oil material while the remaining wastewater contained in the third purification liquid precipitated in the sedimentation tank. The method according to claim 1, The fourth purification step, Process for extracting the refined oil from the waste water of food waste, characterized in that the third purification liquid proceeds in a state of more than 60 degrees Celsius. A first heating unit for heating waste water of food waste with steam heat in the heating tank; A first separation part for separating and removing the large particles of solid sludge contained in the wastewater of the first heating part by using a separator to obtain a first purification liquid from which the large particles of solid sludge have been removed from the waste water; A second heating unit for heating the first purification liquid of the first separation unit by steam heat in a heating tank; A second separator for separating and removing the solid sludge of the fine particles contained in the first purified liquid of the second heating unit to obtain a second purified liquid from which the solid sludge of the fine particles is removed from the first purified liquid; A third heating unit for heating the second purification liquid of the second separation unit with steam heat in the heating tank; A third separation unit for separating the oily substance contained in the second purification liquid of the third heating unit with a separator to obtain a third purification liquid of the oily substance from the second purification liquid; Precipitating unit for extracting the refined oil of the oil material from the third purification liquid by sedimentation and separation of the remaining waste water contained in the third purification liquid of the third separation unit in the precipitation tank; Apparatus for extracting refined oil from wastewater of food waste comprising a. The method according to claim 9, Each said heating part, Apparatus for extracting refined oil from waste water of food waste, characterized in that the pipe for steam is piped inside each of the heating tank is heated by the external surface heat of the steam pipes, the first purification liquid, the second purification liquid . The method according to claim 9, The first separation unit, A device for extracting refined oil from wastewater from food waste in which a screw decanter separator is used. The method according to claim 9, The second separation unit, Apparatus for extracting refined oil from wastewater of food waste in which an ideal separator is used. The method according to claim 9, The third separator, Apparatus for extracting refined oil from wastewater of food waste in which three-phase separators are used. The method according to claim 9, The precipitation portion, Apparatus for extracting refined oil from the waste water of food waste, characterized in that the remaining waste water is separated from the third purified liquid in a state in which the third purified liquid is heated by steam heat in the settling tank.

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