JPH04211494A - Method and apparatus for final treatment of various waste oil - Google Patents

Abstract

PURPOSE: To provide a method for finally treating waste oil of every kind by surely separating various waste oils composed of a mixture of water, a crude oil precipitate, a sandbank and filth into waste and a mixture (water + oil) and an apparatus therefor.

CONSTITUTION: Waste oil of every kind is charged in a heating tank having the piping of a heating medium boiler provided thereto and heated under stirring to be charged in a centrifugal separator and separated into water and oil while passed through the rotary body of the centrifugal separator to be allowed to flow in a mixed oil storage tank while the residue of the waste oil is passed through the discharge port of the rotary body to be accumulated in a waste tank in a state almost free from an oil component and the mixed oil stored in the mixed oil storage tank is allowed to flow in a stirring tank and a catalyst agent is added to this tank to continuously stirr the mixed oil by a stirrer and this mixed oil is passed through the high capacity liquid mixer provided to one place of the outside circulating pipe of the stirring tank several times to be allowed to flow in a purified oil storage tank to obtain purified oil capable of being reused as fuel.

COPYRIGHT: (C)1992,JPO

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for the final treatment of various waste oils.

0002

[Prior Art] Traditionally, a large amount of various types of waste oil is disposed of after use in various industries, oil refineries, various ships, service factories, etc., reaching tens of thousands of drums every day. It is being disposed of by a contractor, and the remaining amount is being disposed of illegally. Therefore, the resulting environmental pollution, that is, air and soil pollution, has become a serious social problem.

[0003] One example is (1) After storing waste crude oil generated during cleaning of a crude oil transport ship, that is, sediment containing a mixture of sandbar, water, crude oil, and other contaminants, in a storage tank, After this is boiled and cooled for oil-water separation work, the crude oil that floats to the top is sold as recycled oil, and the remaining oil-containing water is disposed of as is. are also being processed illegally.

(2) Waste oil that is by-produced by various industrial entities is also disposed of by industrial waste disposal companies, but part of the collected waste oil is incinerated themselves, and the rest is sent to waste oil refiners. After boiling and cooling in a pot using primitive methods, the waste oil that floats to the surface is sold, and the waste that settles at the bottom is illegally disposed of.

(3) Some of the waste engine oil is purchased and refined by refiners, but the remaining refined oil is mixed with flammable materials such as sawdust and used as fuel for direct-fired furnaces. be.

[0006]

[Problem to be Solved by the Invention] Various methods have been tried to solve the above-mentioned serious problems, but it has not been possible to reliably separate various waste oils into waste and mixed oil (water and oil). No possible method has been suggested.

The present invention is intended to solve the above-mentioned conventional problems.

The purpose of the present invention is to convert various waste oils mixed with water, crude oil sediments, sandbars, filth, etc. into waste and mixed oil (water + oil).
The present invention provides a final treatment method and apparatus that can reliably separate the two.

Another object of the present invention is to prevent serious pollution caused by illegal disposal of waste oil by ensuring that the waste is in a state in which almost no oil is attached, that is, in a state sufficient for legal landfilling. Can solve problems. The present invention provides a method and device for the final treatment of waste oil.

Still another object of the present invention is to provide a method and apparatus for the final treatment of waste oil, in which the mixed oil can be further refined and reused as fuel.

[0011]

[Means for Achieving the Object] In order to achieve the above object, the final treatment method for various waste oils according to the present invention includes charging various waste oils into a heating tank equipped with piping of a heat medium boiler, After heating with gradual stirring for ~30 minutes, the waste oil is put into a centrifuge, and as the waste oil passes through the rotating body of the centrifuge, water and oil are separated and flow into the mixed oil storage tank. On the other hand, the waste oil residue is accumulated in the waste tank with almost no oil content through the discharge port of the rotating body, and the mixed oil stored in the mixed oil storage tank is allowed to flow into the stirring tank. Add the catalyst agent and continue stirring with a stirrer, but the 6,000 ~
After several passes through a high performance liquid mixer operated at 8,000 rpm, the refined oil is obtained which can be flowed into a refined oil storage tank and reused as fuel.

[0012] Furthermore, the final treatment device for various types of waste oil according to the present invention includes a heating tank in which piping for a heat medium boiler is installed and a large number of agitators for stirring the various types of waste oils that have been input, and a waste oil tank. , the mixture (water +
a mixed oil storage tank for temporarily storing oil); a stirring tank having a catalyst inlet and an external circulation pipe provided with a stirrer for stirring the mixed oil that has flowed in; , a high-performance liquid mixer that operates at 6,000 to 8,000 rpm and is installed at one location of the external circulation pipe of the stirring tank; and a refined oil storage tank into which the refined oil stored in the stirring tank is fed. It consists of

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus of the present invention for the above purpose will be described in detail with reference to the accompanying drawings.

FIG. 1 is a process diagram of the treatment method of the present invention, and FIG. 2 is a diagram of the treatment steps and apparatus showing an embodiment of the present invention.

A heating tank 1 for heating and stirring various types of waste oil 13 is provided with piping 12 connected to a heat medium boiler 4 inside, and a large number of agitators 2 are provided, so that the waste oil can be heated and stirred. Stir while heating No. 13. Since the heat medium boiler 4 is used to heat the waste oil, the temperature of the waste oil in the heating tank 1 can be raised to 200° C. or higher.

[0016] The heated and stirred soup-like waste oil is then fed into the centrifuge 3 by the pump 8, but the centrifugal separator 3 is approximately horizontal in shape and has a diameter larger than the waste oil inlet. A rotary body 19 is provided to shake the discharge port, and a considerable number of small holes of 0.5 mm or less are formed throughout the rotary body 19, and water or oil particles can pass through the inner surface of the rotary body 19. However, a filter body with fine pores through which the waste or its particles are not passed is attached.

Therefore, when waste oil is put into the rotary body 19 and rotated at high speed, water and oil pass through the fine pores of the filter body, and then through the small holes of the rotary body 19 to form a mixed oil (water + oil). ) into the storage tank 15.

Incidentally, since waste oil sediments or particles thereof cannot pass through the micropores while passing through the interior of the rotary body 19, the rotary body 19 is not able to pass through the fine holes from the inlet of the rotary body 19 to the discharge port on the opposite side. It is discharged while being rotated and transferred on the inner surface of the waste tank 6.

Next, the mixed oil 14 stored in the mixed oil storage tank 5 flows into the stirring tank 7, which has a catalyst inlet and is equipped with a stirrer 10. An external circulation pipe 16 is connected to the outside of the stirring tank 7 .

Furthermore, a high-performance liquid mixer 11 is provided at one location of the external circulation pipe 16, and the high-performance liquid mixer 1
1 is operated at 6,000 to 8,000 rpm to completely mix water and oil.

Therefore, the mixed oil that has flowed into the stirring tank 7 is stirred with the catalyst 17 added thereto, and passes through the high performance liquid mixer 11 several times, resulting in refined oil that can be reused as fuel. This will flow into the refined oil storage tank 9.

The processing steps and embodiments of the present invention having the above-mentioned total positions will be described in detail.

[0023] First step: The collected various waste oils are put into the heating tank 1 equipped with the piping 12 of the heat medium boiler 4 inside, and heated at 200°C or higher for about 15 to 30 minutes with gradual stirring. . The heated waste oil at this time becomes a soup-like waste oil in which water, oil, sandbars, filth, sediment, etc. are mixed.

Second step: The soup-like waste oil that has been stirred and heated in the heating tank 1 is introduced by a pump into the centrifugal separator 3 designed for the centrifugal separation method described above. At this time, due to the physical action of the high-speed rotation of the rotating body 19, the waste oil put into the centrifugal separator 3 passes through the micropores of the filter attached to the inner surface of the rotating body 19. The mixed oil passes through a small hole bored in the rotating body 19 and flows into the mixed oil storage tank 5 .

On the other hand, sediments such as sandbars and filth, ie, waste, are transferred to the waste tank 6 through the outlet on the opposite side of the input port.

The waste 18 at this time is in such a state that there is hardly any oil or the like attached thereto, and there is no problem at all in burying it in a landfill.

Third step: The mixed oil 14 stored in the mixed oil storage tank 5 is caused to flow into the stirring tank 7. Further, the catalyst agent 17 is added through the catalyst agent inlet and stirred by the stirrer 10, but the water and oil are passed several times through the high-performance liquid mixer 11 provided in the external circulation pipe 16. Make sure to mix thoroughly. Next, when the stirring is completed, the valve is turned on and the refined oil purified by the method described above flows into the refined oil storage tank 9.

[0028] The refined oil thus obtained is SO2
, CO, soot, etc. are reduced by more than half and are reused as fuel.

[0029] Five drums of collected various waste oils were put into a kametsu tank 1 equipped with a piping 12 of a heat medium boiler 4, and heated at 200°C or higher for about 15 to 30 minutes with gradual stirring. At this time, the waste oil heated while being stirred is
It looks like a soup, but it is also made up of water, oil, sandbars, filth,
It was in a state where precipitates etc. were mixed.

Next, when the soup-like waste oil was continuously introduced into the rotating body 19 of the centrifugal separator 3, water and oil were absorbed into the pores of the filter attached to the inner surface of the rotating body 19 and the small holes of the rotating body 19. The mixed oil flows through the hole and is stored in the mixed oil storage tank 5. On the other hand, waste 18, which is sediment such as sandbars and filth, from which water and oil have been separated, is deposited in the waste tank 6 through the outlet. It was delayed. The waste 18 that was discharged was about one drum, and the waste at this time had almost no oil, and no oil was attached to it even when touched by hand. waste tank 6
The accumulated waste was later collected and landfilled at a storage site.

Next, the 4 oil stored in the mixed oil storage tank 5
A drum-sized amount of mixed oil 14 is allowed to flow into the stirring tank 7,
Stirring was continued by operating the stirrer 10 while adding the catalyst agent 17. In addition, while stirring, the mixed oil being stirred is passed through a high-performance liquid mixer 11 which is operated at 6,000 to 8,000 rpm and is installed at one location of an external circulation pipe 16 connected to the outside of the stirring tank 7. Several passes were made to ensure that the water and oil were thoroughly mixed.

By the above method, about 4 drams of refined oil, which can be reused as fuel, was obtained with SO2, CO, soot, etc. reduced by more than half.

Further, in this example, approximately 4 drums of refined oil were obtained from 5 drums of waste oil, but it goes without saying that the amount of refined oil obtained varies depending on the quality of the waste oil.

As mentioned above, the present invention is capable of solving the serious environmental pollution problem caused by the treatment of various waste oils, and it is possible to reliably separate the various waste oils into waste and water and oil (mixed oil). The separated waste can be kept in a storage location with almost no oil content in a condition sufficient for landfilling, and the separated mixed oil can be refined and recycled as fuel. The present invention is a new and useful invention that greatly contributes to solving the problem of environmental pollution.

[0035]

[Effects of the Invention] As described above, according to the present invention, water,
It is possible to reliably separate various waste oils consisting of mixtures of crude oil deposits, sandbars, filth, etc. into waste and mixed oil (water + oil). Further, according to the present invention, it is possible to make the waste into a state in which almost no oil adheres to it, thereby solving the serious pollution problem caused by illegal disposal of waste oil. Furthermore, according to the present invention, the above mixture can be further refined and reused as a fuel.

[Brief explanation of the drawing]

FIG. 1 is a process diagram of the treatment method of the present invention.

FIG. 2 is a diagram of processing steps and equipment according to an embodiment of the present invention.

[Explanation of symbols]

1 Heating tank 2 Stirrer 3 Centrifuge 4 Heat medium boiler 5 Mixed oil storage tank 6 Waste tank 7 Stirring tank 8 Pump 9 Refined oil storage tank 10 Stirrer 11 High performance liquid mixer 12 Piping 13 Waste oil 14 Mixed oil 15 Refined oil 16 External circulation pipe 17 Catalyst agent 18 Waste 19 Rotating body

Claims (2)

[Claims] Claim 1: Various kinds of waste oil are put into a heating tank equipped with piping of a heat medium boiler, and heated at 200°C or higher for 15 to 30 minutes.
After heating with gradual stirring for 0 minutes, the waste oil is introduced into a centrifuge, and as the waste oil passes through the rotating body of the centrifuge, water and oil are separated and flow into a mixed oil storage tank; On the other hand, the waste oil residue is accumulated in the waste tank with almost no oil content through the discharge port of the rotating body, and the mixed oil stored in the mixed oil storage tank is allowed to flow into the stirring tank. Add the catalyst and continue stirring with a stirrer, but add several times to a high-performance liquid mixer operated at 6,000 to 8,000 rpm installed in one part of the external circulation pipe of the stirring tank. After making it pass,
A method for final processing of various waste oils, characterized by obtaining refined oil that can be flowed into a refined oil storage tank and reused as fuel. [Claim 2] A heating tank in which piping for a heat medium boiler is installed, a number of agitators are installed to agitate various types of waste oil thrown in, and a rotating body for separating waste, water, and oil. A mixed oil storage tank for temporarily storing the mixture (water + oil) separated from a horizontal centrifuge with a a stirring tank having an external circulation pipe, the stirring tank, a high-performance liquid mixer operated at 6,000 to 8,000 rpm provided at one location of the external circulation pipe of the stirring tank, and the stirring tank; A final processing device for various types of waste oil, comprising a refined oil storage tank into which refined oil stored in the tank flows.