JP2007254672A - Apparatus for treatment of waste edible oil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for the treatment of waste edible oil of continuously treating a waste food oil. <P>SOLUTION: The waste oil treating apparatus converts a waste edible oil to glycerol and an ester by transesterification reaction by mixing the waste edible oil with a transesterification agent in an inline mixer 20, alternately introducing the transesterified liquid into a pair of glycerol separation tanks 27a, 27b, burning the separated glycerol with a boiler 70 and using the heat generated by the boiler 70 for the heating of the waste edible oil, the transesterification reaction and the removal of water from the reclaimed oil composed of the ester. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a waste edible oil treatment apparatus capable of continuously treating waste edible oil.

  The treatment of waste edible oil after use of edible oil such as tempura oil is carried out by mixing with methanol using caustic soda as a catalyst and conducting a transesterification reaction, and then separating the reaction product into glycerin and methyl ester in a separator. Attempts have been made to use methyl esters as fuel for diesel engines.

  Edible oil constitutes fats and oils as glycerin ester, and by reacting with methanol by transesterification, methanol and glycerin having high viscosity are replaced to produce methyl ester and glycerin.

  Waste cooking oil is different from freshly squeezed oil, and it contains various foreign substances used in cooking (tempered liquor and moisture) and is oxidized by cooking, so that it can be transesterified. After removing impurities such as impurities, it is necessary to carry out a transesterification reaction.

Japanese Patent Laid-Open No. 10-182518 JP 2000-211988 JP 2004-67937 A

  However, even if the pretreatment step is performed, the transesterification reaction is a treatment by batch operation, and an apparatus for continuously treating waste edible oil has not been developed.

  Then, the objective of this invention is providing the processing apparatus of the waste edible oil which solves the said subject and can process waste edible oil continuously.

  In order to achieve the above object, the invention of claim 1 is directed to a waste edible oil treatment apparatus for converting edible edible oil into glycerin and an ester by carrying out a transesterification reaction. After mixing, the treatment liquid after the transesterification reaction is alternately introduced into a pair of glycerin separation tanks, separated into glycerin and an ester, the separated glycerin is burned in a boiler, and the heat generated in the boiler is generated. An apparatus for treating waste edible oil, characterized by being used for heating and transesterification of waste edible oil, and for removing water in regenerated oil composed of ester.

  The invention of claim 2 includes two or more receiving tanks for receiving waste edible oil, mixing means for mixing the waste edible oil in each receiving tank, a raw material supply tank for storing the mixed waste edible oil, A first in-line mixer that continuously mixes an ester exchange agent comprising an alcohol such as methanol and a catalyst such as caustic soda and waste cooking oil from a raw material supply tank, and a treatment liquid after the ester exchange reaction from the first in-line mixer. A pair of glycerin separation tanks for separating the glycerin and ester crude regenerated oil produced by introducing alternately, a boiler using glycerin settled and separated in the glycerin separation tank, and fresh water, dilute sulfuric acid, and magnesium mixed A second in-line mixer for continuously mixing the neutralized washing water and the crude regenerated oil separated in the glycerin separation tank; and a second in-line mixer A pair of neutralized wash water separation tanks for alternately introducing the wash crude reclaimed oil from the water into the wash water and the reclaimed oil, a third in-line mixer for continuously mixing the separated reclaimed oil with the fresh water, 3 Introducing reclaimed oil mixed with fresh water from an in-line mixer, separating the oil and water to recover reclaimed oil, and introducing the regenerated oil separated in the oil / water separator tank and steam from the boiler The waste edible oil processing apparatus according to claim 1, further comprising a steam heater that heats and separates moisture in the regenerated oil.

  Invention of Claim 3 is a processing apparatus of the waste edible oil of Claim 2 with which a receiving tank, a raw material supply tank, a 1st-3rd in-line mixer, and each separation tank are accommodated in the cabinet surrounding a boiler. .

  In the invention of claim 4, the glycerin separation tank and the neutralization washing water separation tank are provided with an optical liquid level gauge, and the optical liquid level gauge monitors the boundary surface to separate the lower and upper liquids. It is a processing apparatus of the waste edible oil of Claim 2.

  ADVANTAGE OF THE INVENTION According to this invention, the waste edible oil can be processed continuously, and the outstanding effect that glycerin is burned with a boiler and the heat source can be utilized is exhibited.

  A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

  In FIG. 1, a raw material (waste edible oil) is received by a transport drum 11 by a tank car receiving nozzle 10, and from the transport drum 11 (or directly from the tank car), a strainer is passed through a receiving line 12. In FIG. 13, solids and the like are removed, and the receiving pump 14 takes them into the two or more receiving tanks 16 from the discharge side line 15 a.

  The quality of the edible edible oil received in the receiving tank 16 varies, and those with extremely poor quality are less likely to undergo transesterification, which will be described later, so a high-quality waste edible oil is stored in one of the receiving tanks 16. In addition, the return line 15b is returned by the strainer 13 and the receiving pump 14, respectively, and is supplied from the discharge side line 15a to the raw material supply tank 17, thereby obtaining a edible edible oil with stable quality. The raw material supply tank 17 has a capacity of approximately 800 L, which can hold a processing amount for one day.

  The raw material from the raw material supply tank 17 is filtered by the double strainer 18 and then sent to the first in-line mixer 20 by the fixed supply pump 19 at, for example, 34 L / h.

  On the other hand, an alcohol 22 such as methanol and a catalyst 23 such as caustic soda are supplied to the transesterification tank 21 and stirred by a stirrer 24 to be used as a transesterification agent. This transesterification agent comprises 0.05 kg of caustic soda per 1 L of methanol, which is sent to the first in-line mixer 20 via a fixed amount (6.8 L / H) strainer pump 25.

  The raw material and the transesterification agent are mixed while flowing in the first in-line mixer 20 to cause a transesterification reaction. As will be described later, the in-line mixer 20 is housed in the cabinet C, the atmospheric temperature is kept at 40 to 60 ° C., and continuous transesterification is possible by mixing the raw material and the transesterification agent in the in-line mixer 20. It becomes.

  The fluid after the transesterification reaction is alternately switched into the first glycerin separation tank 27a and the second glycerin separation tank 27b every 30 minutes by switching the first three-way solenoid valve 26.

  After acceptance, in the glycerin separation tanks 27a, 27b, there is alternate sedimentation separation, and the separation tanks 27a, 27b are monitored by the optical liquid level gauges 28a, 28b at the boundary between the upper crude regenerated oil and the lower glycerin. The glycerin separated and collected in the lower part is extracted and sent to the glycerin storage tank 30 via the switching valves 29a and 29b.

  Thereafter, the switching valves 29a and 29b are closed, and the coarsely regenerated oil made of ester accumulated in the upper part is received in the intermediate tank 32 via the switching valves 31a and 31b. By repeating the above operations alternately, continuous processing becomes possible.

  As will be described later, the glycerin accumulated in the glycerin storage tank 30 is supplied to the boiler 70 by the double strainer 71 and the pump 72.

  The crude reclaimed oil is sent again to the second in-line mixer 35 via the strainer 33 and the pump 34.

  In the neutralized washing water tank 40, fresh water 41, dilute hydrochloric acid 42 and magnesium 43 are mixed by a stirrer 44 to obtain neutralized washing water. This neutralized wash water is prepared by mixing 0.02 L of dilute hydrochloric acid and 0.25 kg of magnesium with 1 L of fresh water.

  This neutralized washing water is supplied to the second in-line mixer 35 at 35 mL / H by the strainer 45 and the fixed amount supply pump 46 and mixed with the crude regenerated oil, and then, via the second three-way switching valve 36, A pair of neutralized washing water separation tanks 37a and 37b are alternately switched and sent. Therefore, by the same operation as the glycerin separation, that is, the separation tanks 37a and 37b are monitored by the optical liquid level gauges 38a and 38b, the boundary surface is settling and separated and the water accumulated in the lower part is passed through the switching valves 39a and 39b. The water is returned from the line 53 to the neutralized washing water tank 40 through the on-off valve 80 by gravity flow, or is supplied from the line 82 to the jacketed evaporator 61 through the line 82 by gravity flow.

  The neutralized washing water tank 40 and the jacketed evaporator 61 are provided in the cabinet C at a position lower than the neutralized washing water separation tanks 37a and 37b, and the neutralized washing water separated by the separation tanks 37a and 37b. However, they flow through the lines 53 and 82 by gravity flow to the neutralized washing water tank 40 or the jacketed evaporator 61, respectively.

  When the concentration of the neutralized washing water is low, when the concentration is low, the opening / closing valve 80 is opened and returned to the neutralization washing water tank 40 from the line 53. When the concentration is high, the opening / closing valve 81 is opened. To the jacketed evaporator 61 from the line 82.

  Thereafter, the switching valves 39a and 39b are closed, and the roughly recycled oil accumulated in the upper part is received in the recycled oil tank 48 via the switching valves 47a and 47b.

  The reclaimed oil is supplied from the reclaimed oil tank 48 to the third in-line mixer 52 by the double strainer 50 and the pump 51, and the fresh water is supplied to the in-line mixer 52 from the fresh water tank 55 storing fresh water 54 by the pump 56, The mixture is continuously mixed by the third in-line mixer 52, and is alternately switched to the pair of oil / water separation tanks 57a and 57b via the third three-way switching valve 56.

  In the oil / water separation tanks 57a and 57b, the water is similarly separated, the boundary surface is monitored by the optical liquid level gauges 58a and 58b, and the water accumulated in the lower part by sedimentation is separated via the switching valves 59a and 59b. Feed from line 60 to jacketed evaporator 61.

  Thereafter, the switching valves 59a and 59b are closed, and the regenerated oil accumulated in the upper part is supplied to the steam heater 66 through the switching valves 63a and 63b.

  Steam generated in the boiler 70 is supplied to the steam heater 66, and the regenerated oil is indirectly heated by the steam and heated to about 100 ° C. Thereafter, the reclaimed oil is supplied to the separator 74, the steam in the reclaimed oil is separated, the water concentration is kept within a predetermined value, and stored in the product tank 76 as a final product.

In the boiler 70, as described above, glycerin is sent to the burner 73 and combusted to be used for generation of 1.1 kg / cm ² h saturated steam.

  The waste water separated in the oil / water separation tanks 57a and 57b and the washing water from the line 82 are supplied to the jacketed evaporator 61, and steam from the steam heater 66 is supplied to the jacket of the evaporator 61 so that the waste water is discharged. Is heated by the jacketed evaporator 61, the steam is exhausted by the line 75, and the reduced waste water is drained to the waste water pot 77 and then drained outside the apparatus.

  Condensed water from the jacket is stored in a water tank 78 and circulated and supplied to the boiler 70 by a condensate pump 79.

  As described above, the cabinet C surrounds the boiler 70, and almost all equipment except the transport drum 11, the receiving tank 16, the raw material supply tank 17, and the metering supply pump 19 is accommodated in the cabinet C. Since the inside of C is kept in an atmosphere of 40 to 60 ° C., it is not necessary to heat the raw material for the transesterification reaction or to heat the first in-line mixer 20 separately. In addition, since the second and third in-line mixers 35 and 52 and the separation devices 27, 37 and 57 are also maintained in the range of 40 to 60 ° C., good mixing and separation can be performed.

It is a figure which shows one embodiment of this invention.

Explanation of symbols

16 Receiving tank 17 Raw material supply tank 20 1st in-line mixer 27a, 27b Glycerin separation tank 70 Boiler C Cabinet

Claims (4)

  In a waste edible oil processing apparatus that converts waste edible oil into a glycerin and an ester by performing a transesterification reaction, after mixing the waste edible oil and the transesterification agent with an in-line mixer, the treatment liquid after the transesterification reaction, Introduce alternately into a pair of glycerin separation tanks, separate into glycerin and ester, burn the separated glycerin in a boiler, and heat generated in the boiler from waste cooking oil heating and transesterification, and further from the ester A processing apparatus for waste edible oil, which is used for removing water in the regenerated oil.   Two or more receiving tanks for receiving waste cooking oil, mixing means for mixing the waste cooking oil in each receiving tank, raw material supply tank for storing the mixed waste cooking oil, alcohol such as methanol, caustic soda, etc. The first in-line mixer that continuously mixes the transesterification agent comprising the catalyst and the waste edible oil from the raw material supply tank, and the treatment liquid after the transesterification reaction from the first in-line mixer were alternately introduced and produced. A pair of glycerin separation tanks for separating glycerin and a crude reclaimed oil consisting of esters, a boiler powered by glycerin precipitated and separated in the glycerin separation tank, neutralized washing water mixed with fresh water, dilute sulfuric acid, and magnesium and glycerin separation A second in-line mixer that continuously mixes the roughly regenerated oil separated in the tank, and a cleaning coarse regeneration from the second in-line mixer A pair of neutralized wash water separation tanks for alternately separating the wash water and reclaimed oil, a third in-line mixer for continuously mixing the separated reclaimed oil with fresh water, and fresh water from the third in-line mixer In the regenerated oil, the regenerated oil mixed with the oil and water is separated to recover the regenerated oil by separating the oil and water, and the regenerated oil separated in the oil / water separation tank is introduced and heated by steam from the above boiler. The processing apparatus of the waste edible oil of Claim 1 provided with the steam heater which isolate | separates the water | moisture content.   The processing apparatus of the waste edible oil of Claim 2 with which a receiving tank, a raw material supply tank, a 1st-3rd in-line mixer, and each separation tank are accommodated in the cabinet surrounding a boiler.   The glycerin separation tank and the neutralized washing water separation tank are provided with an optical liquid level gauge, and the optical liquid level gauge monitors the boundary surface to separate the lower and upper liquids. Oil processing equipment.

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