JP2003103160A - Material recycle system of waste oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material recycle system of waste oil which efficiently regenerates a wide variety of waste oil by using a regeneration method fitting properties of the waste oil. SOLUTION: This material recycle system of waste oil contains the following respective processes; A) assorted investigation of waste oil and the investigation of the properties including composition analysis, B) the investigation of the properties required for a regenerated goods, C) a selection of the regeneration method containing at least one kind of treatment operation selected from distillation, filtration, extraction, adsorption, neutralization and reaction in accordance with the result of the investigation of the properties of the waste oil and the investigation of the properties required for the regenerated goods, D) preliminary regeneration by means of the regeneration method and determination of treatment conditions of the regeneration method, E) the execution of a preliminary test for confirming whether the regenerated goods obtained by the preliminary regeneration satisfies the requisites of the process B, F) a request of estimation of the regenerated goods which passes the preliminary test to a recipient, etc., G) the repetition of processes after the process C when the estimation of the preliminary test or recipient, etc., is rejection and H) the execution of a commercial regeneration and the delivery of the generated goods to the recipient when the estimation of the recipient, etc., is acceptance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material recycling system that recycles waste oil generated at home or collected from customers to a reusable quality.

[0002]

2. Description of the Related Art The total demand for organic solvents in Japan is 1
The amount in 1999 was about 2.5 million tons, less than 10% of which was refined and recycled, and most of them are burned as waste oil. On the other hand, there is a strong demand for environmental efforts, and in May 2000, the "Basic Law for Promoting the Formation of a Recycling Society" was enacted with the aim of creating a recycling society.

In the waste treatment method, so-called waste oil is classified as industrial waste. Further, waste oils having a flash point of less than 70 ° C., such as volatile oils, kerosene, and light oils, require more strict management as specially controlled industrial waste. Specific examples of waste oil include waste lubricating oils, waste cleaning oils, waste fuel oils, waste solvents, and the like, and their properties and generation amounts are various. If the generated amount is large, the content rate of useful components is high, and it is easy to recycle, it is possible to regenerate it by installing a special regenerating equipment. Is normal. And, it is usual for the recovery processing company to incinerate it with the waste oil combustion equipment.

However, it is desired to material-recycle various kinds of waste oil that have been incinerated in the past. When reprocessing at the source of waste oil, there is an advantage that you are familiar with the properties of waste oil and the properties required for recycled products, but recovery equipment, recovery technology is required, and by-product sludge, etc. Residue processing issues remain.
When a recovery processing company recycles the waste, it has general-purpose recovery equipment and recovery technology, and it is easy to treat the residual sludge produced as a by-product. Furthermore, when similar waste oils are generated from a plurality of waste oil generation sources, there is an advantage that they can be collectively processed. Therefore, it can be said that treating a plurality of waste oils at one place has a great advantage. However, it is difficult to understand the properties of waste oil and the properties required for recycled products, and in many cases it is difficult to recover with general-purpose recovery equipment and recovery technology alone. There is a need to.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to efficiently regenerate a wide variety of waste oils by a regenerating method suitable for the properties thereof and to realize an optimum material recycling system.

[0006]

[Means for Solving the Problems] That is, according to the present invention, in material recycling the collected waste oil, A) a property investigation including type investigation and composition analysis of the waste oil B) property investigation required for regenerated products C) A regeneration method including at least one treatment operation selected from distillation, filtration, extraction, adsorption, neutralization and reaction, based on the results of the above-mentioned property investigation of waste oil and property investigation required for regenerated products. D) Perform preliminary regeneration by the regeneration method and determine the processing conditions of the regeneration method E) Perform a preliminary test whether the regenerated product obtained by the preliminary regeneration satisfies the requirements of step B F) Preliminary Request the evaluation of the remanufactured products for those that have passed the test G) If the preliminary test or the evaluation of the supplier is unsuccessful, repeat the process after process C H) Evaluation of the supplier Is In the case of the case, the waste oil material recycling system is characterized by including each step of carrying out commercial recycling and delivering recycled products to the customer.

The waste oil to be treated in the present invention includes waste lubricating oils, waste cutting oils, waste polishing oils, waste lubricating oils such as waste hydraulic oils, waste solvents discharged from chemical product manufacturing processes, etc. Waste cleaning oil discharged from processes and equipment cleaning processes,
There is waste fuel oil and the like discharged from fuel tanks and the like. Also,
The waste oil may contain water, a pigment, a resin component and the like in addition to the oil component. It is advantageous that the waste oil comes from one place, but it may be waste lubricant oil collected from various automobiles or the like, or waste solvent collected from many cleaning shops. The regenerated product from waste oil has a quality that can be used for its original purpose as it is or by adding necessary additives.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of an embodiment of the present invention will be described step by step. The steps A to H are preferably performed according to the order, but if there is no necessity for that, the order is arbitrary. Further, in this example, a plurality of waste oils are treated, and at least a part of the equipment used for the treatment is shared with other uses.

Process A In the property investigation including type investigation and composition analysis of waste oil, composition analysis such as original use, main component, impurities such as solid content, ratio of oil to be recovered and properties such as viscosity and freezing point are investigated. To do. These are divided into surveys that include items necessary to obtain recycled products for their intended use, and surveys that include items that they consider necessary for recycling. If the information from the source of the waste oil is sufficient, this property survey only needs to be obtained, but the latter survey is often insufficient, and it is necessary to add composition analysis by various analytical instruments, boiling range survey, etc. is there. When similar waste oils are generated from multiple sources, it is often advantageous to treat them collectively, but in such a case, this survey is particularly important.

Process B In the property survey required for recycled products, waste oil delivery destinations (sources of waste oil, use destinations of recycled products,
It is to investigate the quality and specifications (specs) defined by the delivery destination of recycled products. This depends on the information from the above-mentioned delivery destinations, etc., but it may be inconclusive because it is finally determined by the evaluation of the delivery destinations and the like and the cost of reproduction.

Step C: Selection of a regeneration method including at least one treatment operation selected from distillation, filtration, extraction, adsorption, neutralization and reaction based on the results of the above waste oil investigation and property investigation required for regenerated products. Then, at least one regenerating method judged to be suitable for regenerating waste oil should be selected. When there are a plurality of recycling methods, priorities are set in order of predicted costs within a range that satisfies the quality of recycled products. Ultimately, it is desirable to prepare some recycling methods, because there may be changes due to cost factors such as evaluation by the source of the recycled products and recovery yield. When selecting a recycling method, priority will be given to the method that makes the best use of the equipment and technology possessed. At that time, it is preferable to utilize a process simulator such as distillation calculation.

As a method for regenerating waste oil, at least one treatment operation selected from distillation, filtration, extraction, adsorption, neutralization and reaction is required. The filtration includes centrifugation, membrane separation, filtration after crystallization or precipitate formation, and the reaction includes oxidation, reduction, polymerization and the like. Other physical treatment operations include crystallization such as recrystallization, washing, heating, cooling and drying. These treatment operations are used alone or in combination, but preferably, at least one physical treatment operation selected from distillation, filtration, extraction and adsorption, and other physical treatment operations and neutralization. , A combination of at least one treatment operation selected from chemical treatment operations such as reaction. Distillation residue,
Residues such as filtration residue are by-produced.

Step D Performing preliminary regeneration by the regeneration method means performing experimental regeneration by the selected regeneration method. In this preliminary regeneration, the operating conditions are changed to find the optimum conditions, and the data for setting the conditions for the commercial operation are simultaneously collected. A cost estimate is also made in this preliminary regeneration, and if it is not satisfied, another regeneration method will be considered. In this case, since the recovery rate of the recycled product is important, it is desirable that the recovery rate of the recycled component components contained in the waste oil be 80% or more of the theoretical value.

Step E The preliminary test of whether the recycled product obtained by the preliminary recycling satisfies the requirements of the step B is a test which is preliminarily performed at the recycling source.

Process F Requesting a delivery destination or the like to evaluate a remanufactured product that has passed the preliminary test is to actually confirm whether it can be used commercially.

Process G If the preliminary test or the evaluation of the delivery destination is unsuccessful, the process after the process C is repeated, so that another regeneration method is selected, and the preliminary regeneration, the preliminary test, the delivery destination, etc. are selected. Is to be evaluated twice or more.

Process H When the evaluation at the delivery destination etc. is passed, the product is recycled commercially and the recycled product is delivered to the user.
At least a part of the by-product residue is processed at the reproduction source. By treating at least a part of the oil-containing residue at the recycle source, it is possible to combine the residue generated by other waste oil processing, etc., with a combustion process, etc., which can be used effectively and prevent environmental pollution. Also, there are advantages such as reduction in processing cost.

Next, a method for regenerating waste oil (boiling point of about 110 ° C. or less) made of an organic solvent used for washing manufacturing equipment such as ink and paint will be illustrated. First, high-boiling oil having a sufficiently high boiling point (50 ° C. or higher) is added to the waste oil in an amount of 0.3 to 3 times the weight of the waste oil. This is distilled to recover the oil content in the waste oil as a recycled product. When the oil content distilled from the waste oil is about 80 to 95%, the viscosity may be high and the stirring may be difficult before and after the distillation because of the solid content, but such a problem is caused by adding the high boiling point oil. Is solved. The distillation residue consists of solids and high-boiling oil, which is regenerated or treated by making full use of the equipment and technology possessed.

Next, a method of regenerating waste oil consisting of waste lubricating oil will be illustrated. First, a filter aid is added to waste oil, mixed, and filtered. Here, as a filter aid, an inorganic porous material (activated carbon, diatomaceous earth, white clay, which can also function as an adsorbent,
Alumina, silica alumina, etc.) are preferred. If a substance that can also act as an adsorbent is used as a filter aid, properties such as acid value, viscosity, and coloring are improved. After filtration, microfiltration is performed to further remove fine particles. 1 in this filtration
A reclaimed product from which fine particles up to μm or less are removed can be obtained.
The recovery rate of recycled products from waste oil is approximately 80 to 95%. The filtered solid content is regenerated or processed by making full use of the equipment and technology possessed.

[0020]

EXAMPLES Example 1 Waste oil consisting of a waste ink solvent generated when the equipment was solvent-cleaned by an ink manufacturer was regenerated. The properties of the waste ink solvent, the composition, and the use of the recycled product were obtained from the source of the waste oil, but the boiling point range, the composition, the solid content, etc. required for the recycling were separately measured. Since it was judged that it is advantageous to distill as it is rather than to filter solids such as pigments, the regeneration method by only the distillation operation was selected as the first candidate. Therefore, a preliminary regeneration experiment was conducted in a test distillation pot equipped with a stirrer. From the results of this test, the solvent component can be easily recovered by the distillation operation, but as the solid content concentration in the kettle increases in the latter half of the distillation, the stirring torque increases, and finally the kettle solidifies and the residue It was found that the discharge and cleaning of the pot became difficult. This problem has been solved in advance by adding a high boiling point fuel oil (tar system) to the waste ink solvent as a residual flow regulator. In addition, when the vapor-liquid equilibrium data of the recovered solvent and the high boiling point fuel oil was collected, it was confirmed that the distribution of the fuel oil component to the gas phase side was minute and there was no problem. The recovery yield of the regenerated solvent was 85 to 90% by weight. This regenerated solvent was submitted to the source of waste oil and evaluated, and it passed, so commercial operation was started. Table 1 shows the properties of waste oil, the quality of reclaimed solvent, and the remanufacturing quality standards of customers (the content of components is% by weight).

[0021]

[Table 1]

In the reproduction standard, ethyl acetate, M
EK (methyl ethyl ketone), IPA (isopropyl alcohol), and toluene have no particular required amount regulation, and it is necessary that no pigment be detected (No detect: ND). Regarding the waste oil, the hue (APHA index) was opaque due to the presence of the pigment, but the recycled solvent improved to a level at which the APHA index of transparency was applicable. As a result, it was possible to obtain a recycled product that satisfied all the recycling standards.

Example 2 Waste oil consisting of waste lubricating oil for a vacuum pump was regenerated.
The properties and composition of this waste oil and the use of the recycled product were obtained from the source of the waste oil, but the composition and solid content necessary for the recycling were measured from another viewpoint. Based on the properties shown in Table 2, the causative substances for the kinematic viscosity and the degree of contamination exceeding the reproduction standard were investigated. In the petroleum ether dissolution test (understanding the deterioration state of oil), the petroleum ether insoluble content was 3.0% by weight, of which foreign matter (SS content) was 2.5% by weight and the oil deterioration product was 0.5% by weight. . Further, the elemental analysis of SS shows that Si is 25.5.
% By weight, C was 47.1% by weight, and Fe was 0.4% by weight. The particle size distribution of SS is 0.2% to 0.5 μm, 2%, 0.5
.About.1.0 .mu.m was 74% and 1.0 to 2.0 .mu.m was 24%. From the above results, it was decided that the removal of the SS content was carried out by filtration, and the oil-degraded product was removed by adsorption by the adsorbent. First, S
When the openings of the S-content removing filter and the filtration rate were measured, it was found that when the opening was more than 5 μm, the capture rate decreased sharply, and a precision filter with an opening of 1 μm or less was necessary. On the other hand, if the mesh size is reduced, the filtration rate will decrease. Therefore, a two-stage filtration method was adopted in which relatively large particles of SS were filtered by coarse filtration with a filter having an opening of 5 μm, and then fine filtration was performed with a precision filter having an opening of 1 μm or less. Next, we examined the use of a filter aid, which is an adsorbent that adsorbs oil deterioration products.
A filter aid that is also effective was selected. Silica-alumina type porous adsorbent is effective with the smallest addition amount (N
It was confirmed that there is an AS grade). 3% by weight,
As a result of measuring the filtration amount every hour with the operation temperature set at 80 ° C., no sign of clogging was observed even after 6 hours, and the effect as a filter aid could be confirmed. Table 2 shows the properties and specifications of waste lubricating oil and recycled products.

[0024]

[Table 2]

As a result, it was possible to satisfy the standard values for the items (kinetic viscosity / contamination degree) whose waste oil properties exceeded the standards for recycled products.

[0026]

The above-described material system of the present invention makes it possible to convert waste oil, which has hitherto been incurred at the expense of processing cost, into a recycled product of a valuable value by the most efficient method, and The processing cost is also low. Therefore, the recycling system according to the present invention can make a great contribution to the suppression of waste such as global warming and PRTR, and to the realization of a resource recycling society.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10N 40:08 C10N 40:08 40:22 40:22 (72) Inventor Yasuji Fukuda Tobata-ku, Kitakyushu, Fukuoka Nakahara Masaki no Hama 46-80 F-term in Shin Nikka Environmental Engineering Co., Ltd. (reference) 4G075 AA13 AA37 BA06 BB02 BB03 BB04 BB05 FC02 4H003 DA12 DB03 ED03 ED28 ED30 ED32 FA03 FA45 4H013 AA03 4H104 JA03 PA05 PA22

Claims (5)

[Claims] 1. Material recycling of the collected waste oil, A) performing a property investigation including type investigation and composition analysis of the waste oil B) conducting a property investigation required for a recycled product C) property investigation of the above waste oil And based on the results of the property investigation required for the regenerated product, select a regeneration method including at least one treatment operation selected from distillation, filtration, extraction, adsorption, neutralization and reaction D) According to the regeneration method Preliminary regeneration is performed to determine the processing conditions for the regeneration method E) Whether the regenerated product obtained by preliminary regeneration satisfies the requirements of step B, and a preliminary test is performed F) Evaluation of the regenerated product that has passed the preliminary test G) If the preliminary test or the evaluation of the delivery destination is unsuccessful, repeat the process after the process C. H) If the evaluation of the delivery destination is passed, it is regenerated commercially. Carry out Waste oil material recycling system, which comprises the steps of that delivered to the destination of delivery of raw products. 2. The material recycling system for waste oil according to claim 1, wherein the waste oil is waste lubricating oil, waste cleaning oil or waste solvent. 3. The waste oil material recycling system according to claim 1, wherein in step H, at least a part of the by-product residue is treated at the regeneration source. 4. The waste oil material recycling system according to claim 1, wherein the recovery rate is 80% or more of the theoretical recovery value calculated from the investigation of the steps A and B. 5. Waste oil recovered by the system according to any one of claims 1 to 4.