TW201538709A - Method and system for producing renewable heavy oil - Google Patents

Abstract

A method for producing renewable heavy oil, during the processing of renewable heavy oil containing water-containing waste oil and the content of water is less than 1 wt%, comprises: a float separation process, in which the waste oil is heated to a temperature of 40 DEG C ~ 60 DEG C to extract the upper layer of liquid that was separated into two layers; a first solid-liquid separation process to obtain liquid by removing solid components of more than 0.8mm from the liquid obtained from the float separation process; a second solid-liquid separation process to obtain liquid by removing solid components of more than 5 micrometers from the liquid obtained from the first solid-liquid separation process; a heating and a three-phase centrifugation separation process, wherein the liquid obtained from the second solid-liquid separation process is heated to the temperature range of 80 DEG C~100 DEG C, followed by subjecting to a three-phase centrifugation separation machine for separation into a light liquid, heavy liquid and sludge; and a water evaporation process, wherein the light liquid obtained from the heating and three-phase centrifugation separation process is heated to a temperature range of 100 DEG C~110 DEG C, and stirred for evaporating water to make the residual liquid form renewable heavy oil. By the treatment of water-containing waste oil, a high-purity renewable heavy oil almost completely free of water can be obtained.

Description

Recycled heavy oil manufacturing method and manufacturing system

The present invention relates to a method and a manufacturing system for regenerating heavy oil which is used to regenerate waste oil to produce heavy oil for regenerating heavy oil.

Most of the waste oil can be recycled. For example, engine oil, gear oil, automatic transmission fluid (Automatic Transmission Fluid), mandrel oil and other lubricating oils, hydraulic oil and cutting oil, as well as processing oils from cleaning oils, mineral oils, and discarded heavy oils. Wait. In the state of being recovered and stored in the waste oil tank, a plurality of types of oil are usually mixed, and foreign matter and moisture of the solid component are contained.

There have been several disclosures of techniques for recycling such waste oil. For example, Japanese Patent Laid-Open Publication No. 2003-306682 (cited reference 1), JP-A-2006-104233 (cited reference 2), JP-A-2013 -60573 (cited document 3).

Citation 1 discloses a waste oil recovery and regeneration treatment system comprising a process for removing impurities from waste oil by centrifugal separation; and a process of heating the waste oil to evaporate the impurities.

Citation 2 discloses a method for treating waste oil, which is a method in which three-phase centrifugal separation is carried out after heating waste oil, and then the light liquid is heated to take the upper layer oil as a regenerated oil.

Citation 3 discloses a reclaimed oil producing apparatus for producing reclaimed oil from waste oil, and a water separator including a centrifugal separator, a water separator which is at least two stages which are allowed to stand for oil-water separation, and pulverized by A fuel reformer containing the sludge in the separated oil to reconstitute the oil.

As disclosed in the above cited documents 1 to 3, in the conventional technique for regenerating waste oil, various methods of heating, centrifuging, filtering, distillation, and the like are combined. However, in order to remove water almost completely from waste oil containing moisture, large-scale equipment and the like are required; in the present state, it is difficult to obtain high-purity reclaimed oil by a simple apparatus, particularly a moisture content system. Recycled heavy oil with less than 1% by weight.

It is an object of embodiments of the present invention to provide a method and a manufacturing system for regenerating heavy oil by treating waste oil containing moisture to obtain a high-purity reclaimed heavy oil that almost completely removes moisture.

In order to achieve the above object, the present invention provides a constitution in which a waste oil containing moisture is treated and a moisture content is a method for producing a regenerated heavy oil having a weight percentage of less than 1% by weight. , comprising: a floating separation process, heating the waste oil to a temperature of 40 ° C to 60 ° C to take out the liquid separated into the upper layer portion of the second layer; the first solid-liquid separation process, in the liquid obtained by the floating separation process, Removing the solid component exceeding 0.8 mm to take out the liquid; the second solid-liquid separation process, removing the solid component exceeding 5 μm from the liquid obtained by the first solid-liquid separation process to take out the liquid; heating and three-phase centrifugation The process, the liquid obtained by the second solid-liquid separation process is heated to a temperature in the range of 80 ° C to 100 ° C, and then separated into a light liquid, a heavy liquid and a sludge by a three-phase centrifugal separator; In the evaporation process, the light liquid obtained by the heating and three-phase centrifugal separation process is heated to a temperature in the range of 100 ° C to 110 ° C, and the water is evaporated by stirring to make the residual liquid form Renewable heavy oil.

In the first aspect, the floating separation process, the heating centrifugation process, and the heating of the moisture evaporation process are performed by heat exchange with water vapor.

In a second aspect of the present invention, in a reclaimed heavy oil manufacturing system for treating waste oil containing moisture and having a moisture content of less than 1% by weight, comprising: a heating device, heating the waste oil to a temperature of 40 ° C to 60 ° C, separating the waste oil into two layers to take out the liquid of the upper layer; the first solid-liquid separation device, the liquid obtained by the first heating device Removing a solid component exceeding 0.8 mm to take out the liquid; and a second solid-liquid separation device for removing a solid component exceeding 5 μm from the liquid obtained by the first solid-liquid separation device to take out the liquid; and a second heating device The liquid obtained by the second solid-liquid separation device is heated to a temperature in the range of 80 ° C to 100 ° C; the three-phase centrifugal separator separates the liquid obtained by the second heating device into a light liquid and a heavy substance. Liquid and sludge; a third heating device, heating the light liquid obtained by the three-phase centrifugal separator to a temperature in the range of 100 ° C to 110 ° C, and evaporating water by stirring to form a residual liquid Regenerate heavy oil.

In the second aspect, the first heating device, the second heating device, and the third heating device are heating devices that exchange heat with water vapor.

According to the method and system for producing a regenerated heavy oil of the present invention, it is possible to produce a regenerated heavy oil having a moisture content of less than 1% by weight at a low cost.

〔this invention〕

T1, T2, T3, T4, T5, T6, T7, T8, T9‧‧ oil tanks

P1, P2, P3, P4, P5, P6, P7‧‧ ‧ pump

S1‧‧‧ filter

S2‧‧‧ centrifugal separator

S3‧‧‧Three-phase centrifugal separator

H1, H2, H3‧‧‧ heating device

Fig. 1 is a flow chart showing a method and a manufacturing system for producing a regenerated heavy oil of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt; Flow chart of heavy oil manufacturing method and manufacturing system.

First, various waste oils are recovered and stored in the oil tank T1. The waste oil to be treated according to the present invention corresponds to a material which can be used as a regenerated heavy oil from the A heavy oil to the B heavy oil in the JIS standard. As such heavy oils, there are engine oils, gear oils, automatic transmission fluids, oils such as mandrel oils, hydraulic oils and cutting oils, as well as processing oils derived from cleaning oils and mineral oils. Discarded heavy oils, etc. These waste oils usually contain a considerable amount of water (about 6 to 16% by weight on average). In addition, it also contains various sizes. Foreign matter of solid components.

In the conventional reclaimed heavy oil treatment method, in order to remove moisture, heating or centrifugation is performed. However, in order to make the moisture content less than 1% by weight, a large-scale distillation apparatus or the like is required, resulting in an increase in cost. The present invention provides a method and apparatus for regenerating heavy oil that is as simple as possible and that can produce less than 1% by weight of moisture.

<Floating Separation Process> The waste oil stored in the oil tank T1 is sent to the first heating device H1 by pumping. In the first heating device, a heat exchange tube is provided in the oil tank container, and the heat exchange tube has a structure connected to a water vapor generating device outside the oil tank container. The waste oil filled in the oil tank to which the heat exchanger is attached is heated to a suitable temperature in the range of 40 ° C to 60 ° C, preferably about 50 ° C. In the heated state, wait for a certain period of time until the waste oil is separated into two layers. After the waste oil is separated into two layers, only the upper layer portion has been taken out and sent to the next process. The portion of the lower layer removed in the floating separation process is almost all moisture.

<First Solid-Liquid Separation Process> The liquid obtained by the floating separation process passes through the sieve S1 of the separation device of the first solid-liquid separation process. In the first solid-liquid separation process, foreign matter exceeding a solid content of about 0.8 mm is removed. The liquid that has passed through the screen S1 is recovered to the oil tank T2.

<Second Solid-Liquid Separation Process> The liquid recovered to the oil tank T2 is passed through the centrifugal separation device S2 of the separation device of the second solid-liquid separation process by the pump P2. The centrifugal separator S2 is, for example, a micro separator CF150 manufactured by Dongdu Separator Co., Ltd. In the second solid-liquid separation process, foreign matter exceeding a solid content of about 5 μm is removed. The liquid that has passed through the micro separator S2 is recovered to the oil tank T3.

<Heating and Three-Phase Centrifugation Process> The liquid recovered to the oil tank T3 is sent to the second heating device H2 in the preceding stage of the heating and three-phase centrifugal separation process by the pump P3. The second heating device H2 is constituted by an oil tank container that exchanges heat with steam, similarly to the first heating device H1. Filling the waste oil in the oil tank to which the heat exchanger is attached, It is heated to a suitable temperature in the range of 80 ° C to 100 ° C, preferably about 90 ° C. The heated liquid is introduced into the three-stage centrifugal separator S3 in the latter stage.

The three-phase centrifugal separator S3 in the latter stage is, for example, a centrifugal separator type oil cleaner SJ150J manufactured by Mitsubishi Chemical Corporation. The three-phase centrifugal separator S3 separates the liquid of the waste oil into a light liquid, a heavy liquid, and a sludge. Thereby, the oil is used as a light liquid, and the water is used as a heavy liquid, and the solid content in the range of 0.1 to 5 μm is separated as sludge (also water content). The light liquid, heavy liquid and sludge are recovered in oil tanks T4, T5 and T6, respectively. Further, the heavy liquid is sent to the oil tank T8 by the pump P5 and processed in the incinerator. The sludge is sent to the oil tank T9 by the pump P6 and processed in the incinerator.

<Moisture Evaporation Process> Obtained in the heating and three-phase centrifugation process, and the light liquid in the oil tank T4 is recovered, which is sent to the third heating device H3 by the pump P4. Similarly to the first heating device H1 and the second heating device H2, the third heating device H3 is constituted by an oil tank container that exchanges heat with steam. The light liquid filled in the oil bath in which the heat exchanger is attached is heated to a temperature in the range of 100 ° C to 110 ° C, preferably in the range of 103 ° C to 105 ° C. In the oil tank container, stirring is performed in the circumferential direction by a stirrer, and a stirring pump is provided below the oil tank container to stir in the vertical direction. Thereby, the light liquid in the oil tank container can be uniformly heated, and the water can be evaporated without any omission in the entire light liquid. Further, it is preferable to suppress the intrusion of air by adjusting the pressure in the oil tank container to a positive pressure. Thereby, even if the low volatile oil evaporates, the ignition or the fire can be suppressed.

When the temperature of the third heating device H3 is large and the amount of processing of the light liquid is large, it can be set to be high. In addition, in the case where the oil and water are separated from the difficult waste oil, the treatment amount can be reduced once, or the temperature can be set high, or the treatment time can be increased, or the stirring force can be strengthened, and one or a plurality of them can be appropriately combined to Improve water evaporation capacity.

For the light liquid, by performing the treatment of the process, the water can be evaporated, and the moisture content of the residual liquid can be formed to a weight percentage of less than 1%. Water evaporation process The liquid is sent to the oil tank T7 by the pump P7 and stored as regenerated heavy oil.

In the above-described method and system for producing a regenerated heavy oil according to the present invention, each of the water vapor generating devices of the first to third heating devices is not required to be separately provided, and a single steam generating device may be shared. A general steam generating device capable of generating water vapor of 0.1 MPa to 5 MPa and 110 to 250 ° C. As the water vapor generation device (or the steam heat exchange device), for example, a water-water separation device manufactured by Gunto Industries Co., Ltd. can be used.

The method and the manufacturing system for regenerating heavy oil of the present invention are the best combination of a general solid-liquid separation device, a water vapor heating device, and a three-phase centrifugal separator, and can produce a moisture content of less than 1% by weight at a low cost. Percentage of recycled heavy oil.

<Examples> The results of carrying out the above-described embodiments of the present invention in a plurality of times are as follows:

Waste oil: 55~70kL

Recycled heavy oil: 45~60kL

The amount of waste oil before treatment: 6~12% by weight

The amount of water in the regenerated heavy oil after treatment: 0.6~0.8% by weight

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

T1, T2, T3, T4, T5, T6, T7, T8, T9‧‧ oil tanks

P1, P2, P3, P4, P5, P6, P7‧‧ ‧ pump

S1‧‧‧ filter

S2‧‧‧ centrifugal separator

S3‧‧‧Three-phase centrifugal separator

H1, H2, H3‧‧‧ heating device

Claims (4)

The invention relates to a method for manufacturing a regenerative heavy oil, which comprises: a floating upper separation process for heating waste oil containing moisture and having a moisture content of less than 1% by weight, and heating the waste oil to a temperature of 40° C. to 60° C. Taking out the liquid separated into the upper layer portion of the second layer; in the first solid-liquid separation process, the solid component exceeding 0.8 mm is removed from the liquid obtained by the floating separation process to take out the liquid; the second solid-liquid separation process is In the liquid obtained by the first solid-liquid separation process, the solid component exceeding 5 μm is removed to take out the liquid; the heating and the three-phase centrifugal separation process are performed, and the liquid obtained by the second solid-liquid separation process is heated to 80 ° C. After the temperature in the range of 100 ° C, the light liquid, the heavy liquid and the sludge are separated by a three-phase centrifugal separator; and the water evaporation process, the light liquid obtained by the heating and three-phase centrifugal separation process is heated. To a temperature in the range of 100 ° C to 110 ° C, and evaporation of water by stirring, the residual liquid forms a regenerated heavy oil. The method for producing a regenerated heavy oil according to claim 1, wherein the floating separation process, the heating centrifugal separation process, and the heating of the moisture evaporation process are performed by heat exchange with water vapor. A regenerative heavy oil manufacturing system, which comprises: a first heating device for heating waste oil containing moisture and having a moisture content of less than 1% by weight, comprising: a first heating device, heating the waste oil to a temperature of 40 ° C to 60 ° C Separating the waste oil into two layers to take out the liquid of the upper layer; the first solid-liquid separation device removes the solid component exceeding 0.8 mm from the liquid obtained by the first heating device to take out the liquid; a liquid separation device, which is obtained from the liquid obtained by the first solid-liquid separation device Except for the solid component exceeding 5 μm to take out the liquid; the second heating device heats the liquid obtained by the second solid-liquid separation device to a temperature ranging from 80 ° C to 100 ° C; the three-phase centrifugal separator will be The liquid obtained by the heating device is separated into a light liquid, a heavy liquid and a sludge; and the third heating device heats the light liquid obtained by the three-phase centrifugal separator to a range of 100 ° C to 110 ° C. The temperature, and the water is evaporated by stirring, so that the residual liquid forms a regenerated heavy oil. The regenerative heavy oil production system according to claim 3, wherein the first heating device, the second heating device, and the third heating device are heating devices that exchange heat with water vapor.