CN211713018U - Recovery system of waste mineral oil - Google Patents
Recovery system of waste mineral oil Download PDFInfo
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- CN211713018U CN211713018U CN201922455197.9U CN201922455197U CN211713018U CN 211713018 U CN211713018 U CN 211713018U CN 201922455197 U CN201922455197 U CN 201922455197U CN 211713018 U CN211713018 U CN 211713018U
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Abstract
The utility model discloses a recovery system, which comprises a physical sedimentation tank, a flocculation precipitation unit, a fine filtration unit, a flash evaporation unit, a reduced pressure distillation unit, a carclazyte decolorization unit and a filter pressing unit which are connected in sequence; still include waste mineral oil memory cell, finished product memory cell, incineration plant and waste water tank, waste mineral oil memory cell with the physics sedimentation tank is connected, the finished product memory cell with the vacuum distillation unit with the filter-pressing unit is connected, the waste water tank with the flash distillation unit is connected. The utility model discloses can carry out high-efficient the retrieving to waste mineral oil, the base oil impurity content who obtains is low, and the quality is high, and the quality accords with the national standard requirement, but the range of application is wide. The utility model discloses a receive and strain process and carclazyte decoloration process and can effectively get rid of rotten filth and impurity in the waste mineral oil, promoted the quality of regeneration base oil greatly.
Description
Technical Field
The utility model relates to a waste mineral oil recovery processing technology field especially relates to a recovery system of waste mineral oil.
Background
Mineral oil is the most widely used fossil energy source for human beings at present, but the mineral oil can become waste mineral oil if influenced by some factors in the using process, such as: contaminated by foreign matter, water absorption, thermal decomposition, oxidation or dilution by fuel oil, etc. Besides losing the original excellent working performance, the waste mineral oil is usually in a high-temperature environment for a long time or is subjected to catalytic oxidation of impurities, and a plurality of substances which have harmful effects on human bodies are generated in the waste mineral oil, such as: polycyclic aromatic hydrocarbons such as 3, 4-benzopyrene (PAH) with strong carcinogenic effect, and polycyclic aromatic hydrocarbons containing chlorine such as polychlorinated biphenyl (PCB) with strong toxic effect. The waste mineral oil also contains a plurality of heavy metal additives and organic matters containing chlorine, sulfur and phosphorus which are added for improving the performance of the oil material, and the heavy metal additives and the organic matters are substances which have serious toxicity to the ecological environment and living bodies.
At present, the following methods are mainly used for treating the waste mineral oil: 1. and (4) discarding. For small quantities of waste oil, people often pour it into sewers, open air, rivers or refuse bins, but the harmful substances in the waste oil can cause serious ecological damage. 2. And (5) burning. Generally, the fuel is directly used as fuel, but the combustion tail gas contains a large amount of heavy metal oxide and polycyclic aromatic hydrocarbon oxide generated by incomplete combustion, which can cause serious pollution to air. 3. And (4) recycling. The metamorphic substance and impurities only account for a small part in the waste oil, about 1 to 25 percent, and the rest 75 to 99 percent are useful components. Therefore, the waste mineral oil can be regenerated into useful oil only by certain treatment.
The industrial treatment process for recycling the waste mineral oil generally comprises the following steps: conveying the waste mineral oil into a settling tank, adding a flocculating agent for settling separation, filtering lower-layer water and slag after layering, discharging the wastewater into a wastewater treatment tank, packaging the waste slag, and placing the waste slag in a waste slag area for treatment; and (3) conveying the settled oil layer into a distillation still, carrying out reduced pressure distillation, separating light components and water, layering fractions, cooling the upper oil layer, packaging to obtain a finished product, and discharging the lower water layer to a wastewater treatment tank. The mineral oil recovered by the process has the advantages of complex oil quality, more impurities, poor quality and narrow application range, and the waste mineral oil cannot be effectively recycled.
SUMMERY OF THE UTILITY MODEL
For the shortcoming and the deficiency that exist among the above-mentioned prior art of solving, the utility model aims to provide a recovery process and recovery system of waste mineral oil to effectively get rid of rotten filth and impurity in the waste oil, the base oil that the quality accords with the national standard requirement is regenerated to waste mineral oil.
In order to realize the purpose, the utility model discloses the technical scheme who takes includes following two aspects:
in a first aspect, the present invention provides a process for the recovery of waste mineral oil, comprising the steps of:
(1) removing solid impurities from the waste mineral oil through physical sedimentation and flocculation precipitation;
(2) fine filtering: filtering the waste mineral oil by using a precision filter;
(3) flash evaporation: removing water and volatile substances in the waste mineral oil by using a flash evaporator;
(4) and (3) reduced pressure distillation: removing light components in the waste mineral oil by using a vacuum film evaporator;
(5) and (4) nanofiltration: filtering the waste mineral oil after removing the light components by using a nanofiltration membrane, wherein the material penetrating through the nanofiltration membrane is the regenerated base oil;
(6) bleaching with clay: and (4) decoloring the regenerated base oil by using argil, filtering and cooling to obtain the decolored base oil.
Preferably, in the step (1), the specific operation of flocculation and precipitation is as follows: adding flocculant into the physically settled waste mineral oil, heating and stirring, settling and separating, burning the generated precipitate residue, and finely filtering the upper layer liquid. Preferably, the flocculating agent is water glass water solution with the density of 1.2g/mL, or active alkali with the purity of 90-96%, or polyamide resin with the molecular weight of 650, or sulfonic acid with the purity of 92-98%. In the working procedure, the flocculant can be more fully contacted with the waste mineral oil by heating and stirring, so that the flocculant and the solid impurities can be better and more quickly combined.
Preferably, in the step (3), the flash evaporation conditions are as follows: the pressure is-0.8 kpa to-1.0 kpa, the temperature is 110 to 120 ℃, and the flow rate is controlled to be 3000L/h. And (4) burning the waste gas generated by flash evaporation, and enabling the waste water to enter a factory sewage treatment area.
Preferably, in the step (4), the reduced pressure distillation conditions are as follows: the pressure is-0.8 kpa to-1.0 kpa, the temperature is 200 ℃ to 220 ℃, and the flow is controlled to be 2000L/h to 3000L/h. In the step, light components in the waste mineral oil are evaporated, vaporized and condensed into liquid, and then the liquid enters a light component storage tank, and the waste mineral oil after light removal enters a nanofiltration membrane for filtration.
The nanofiltration membrane used in the step (5) has the molecular weight cutoff of 200-1000 Da and has the sieving effect, substances with molecular weight larger than the molecular weight cutoff of the membrane are intercepted by the membrane, and otherwise, the substances permeate the membrane, so that the base oil component in the waste mineral oil is extracted. Meanwhile, the nanofiltration membrane can separate the charged substances by utilizing the charge effect, so that the metal ion additive components in the waste mineral oil can be removed. In the step, the regenerated base oil which permeates through the nanofiltration membrane enters a clay decoloring procedure; the heavy residual oil trapped by the film is incinerated.
Preferably, in the step (6), the clay decoloring operation is as follows: mixing the regenerated base oil to be decolorized with argil, and stirring for 20-40 min at 110-130 ℃; the filtration is carried out by adopting a plate-and-frame filter press to separate the clay residue and the oil.
In a second aspect, the invention provides a recovery system of waste mineral oil, which comprises a physical sedimentation tank, a flocculation precipitation unit, a fine filtration unit, a flash evaporation unit, a reduced pressure distillation unit, a clay decolorization unit and a filter pressing unit which are connected in sequence; still include waste mineral oil memory cell, finished product memory cell, incineration plant and waste water tank, waste mineral oil memory cell with the physics is subsided the unit and is connected, finished product memory cell with the vacuum distillation unit with the filter-pressing unit is connected, waste water tank with the flash distillation unit is connected.
Preferably, the waste mineral oil storage unit includes waste mineral oil storage jar and first charge pump, the bin outlet of waste mineral oil storage jar with the physics is subsided the unit connection, the pump of unloading of waste mineral oil is located on the bin outlet of waste mineral oil storage jar.
Preferably, the finished product storage unit comprises a light fuel oil storage tank connected with the reduced pressure distillation unit and a finished product base oil storage tank connected with the filter pressing unit.
And conveying the waste residues generated by physical sedimentation to the incineration workshop for incineration treatment, and allowing the physically sedimentated waste mineral oil to enter a flocculation precipitation unit for flocculation precipitation.
The flocculation precipitation unit comprises a first heating stirring tank, a settling tank and a first steam heat exchanger. The feed inlet of first heating agitator tank with the leakage fluid dram of physics sedimentation tank is connected, the bin outlet of first heating agitator tank with the feed inlet of settling cask is connected, the settling cask be equipped with the leakage fluid dram that the unit is connected is strained to the essence and be used for discharging the row's cinder notch of deposiing the waste residue, first steam heat exchanger with first heating agitator tank connects. Preferably, a slag discharge pump is arranged on a slag discharge port of the settling tank, and waste slag is discharged and then conveyed to the incineration workshop for incineration treatment. Preferably, a transfer pump is arranged between the first heating stirring tank and the physical sedimentation tank. Preferably, the heating mode of the first heating stirring tank is internal coil heating.
The fine filtering unit comprises a fine filter. Preferably, the aperture of the filter screen of the precision filter is 0.05mm, and the filter screen is made of stainless steel. Preferably, a second feeding pump is arranged between the liquid inlet of the precision filter and the liquid outlet of the settling tank.
The flash distillation unit comprises a flash tower, a second steam heat exchanger and a first cooler, wherein a liquid inlet of the flash tower is connected with a filtrate outlet of the precision filter, an air outlet of the flash tower is connected with the first cooler, and the second steam heat exchanger is connected with the flash tower. And after the moisture and volatile organic compounds in the waste mineral oil are evaporated and vaporized in the flash tower, discharging the water and the volatile organic compounds from an exhaust port of the flash tower and entering a first cooler for cooling treatment, discharging the cooled liquid into the waste water tank, and subsequently entering a factory sewage treatment process, wherein the gas which is not cooled enters the incineration workshop for incineration treatment. Preferably, a first elliptic gear flowmeter is arranged on the liquid inlet of the flash tower.
The reduced pressure distillation unit comprises a spiral plate type heat exchanger, a vacuum film evaporator, a nano filter, a second condenser and a semi-finished product cache tank; the inlet of spiral plate heat exchanger with the leakage fluid dram of flash column is connected, spiral plate heat exchanger's leakage fluid dram with vacuum film evaporator's feed inlet is connected, vacuum film evaporator's light component bin outlet with the second condenser is connected, the second condenser with light fuel oil storage jar is connected, vacuum film evaporator's heavy component bin outlet with the nanofiltration ware is connected, receive the filtrating export of filter with semi-manufactured goods buffer tank connects. Preferably, a second elliptic gear flowmeter is arranged on the feed inlet of the vacuum film evaporator. Preferably, the molecular weight cut-off of the nano filter is between 200 and 1000 Da. In the reduced pressure distillation unit, waste mineral oil is heated by a spiral plate type heat exchanger before entering a vacuum film evaporator.
The carclazyte decoloration unit includes second heating agitator tank and third steam heat exchanger, and third steam heat exchanger is connected with the second heating agitator tank, the feed inlet of second heating agitator tank with the leakage fluid dram of semi-manufactured goods buffer memory jar is connected, the bin outlet of second heating agitator tank with the filter-pressing unit is connected. Preferably, the heating mode of the second heating stirring tank is internal coil heating. Preferably, a third feeding pump is arranged on the liquid inlet of the second heating and stirring tank.
The filter pressing unit comprises a filter press, and a liquid inlet of the filter press is connected with a liquid outlet of the second heating stirring tank. Preferably, the filter press is a plate and frame filter press. The invention utilizes a filter press to filter the mixture of the argil and the regenerated base oil so as to separate the argil residues from the regenerated base oil, the separated argil residues enter an incineration workshop to be incinerated, and the separated decolored base oil is stored in the finished base oil storage tank.
The working principle of the recovery system is as follows: the waste mineral oil stored in the waste mineral oil storage unit firstly enters a physical sedimentation tank for physical sedimentation, and part of solid impurities are removed; then entering a flocculation precipitation unit for flocculation precipitation, and further removing solid impurities by virtue of a flocculating agent; then the mixture enters a fine filtration unit for filtration, and impurities with the thickness of more than 0.05mm are removed; then entering a flash evaporation unit to remove moisture and volatile substances; then the light components are separated in a reduced pressure distillation unit, the separated light components are stored in a light fuel oil storage tank, the heavy components flow into the bottom of the tower and enter a nanofiltration device for nanofiltration treatment, and the regenerated base oil passing through the nanofiltration membrane enters a semi-finished product cache tank; the regenerated base oil in the semi-finished product buffer tank enters a clay decoloring unit, and is decolored by using clay; then the obtained product enters a filter pressing unit for solid-liquid separation, and the separated decolorized base oil enters a finished product base oil storage tank, namely the recovery treatment of the waste mineral oil is completed. Solid impurities such as waste residues and filter residues generated by the physical sedimentation tank, the flocculation precipitation unit and the clay decoloration unit are subjected to incineration treatment through an incineration workshop, waste gas generated by the flash evaporation unit is also subjected to incineration treatment through the incineration workshop, and wastewater generated by the flash evaporation unit enters plant sewage treatment.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a recovery process and recovery system can carry out high-efficient the recovery to waste mineral oil, and the base oil impurity content who obtains is low, and the quality is high, and the quality accords with the national standard requirement, but the range of application is wide. The utility model discloses a receive and strain process and carclazyte decoloration process and can effectively get rid of rotten filth and impurity in the waste mineral oil, promoted the quality of regeneration base oil greatly.
Drawings
FIG. 1 is a schematic view of a system for recovering waste mineral oil according to the present invention;
FIG. 2 is a flow chart of the process for recovering waste mineral oil according to the present invention.
In the figure, a waste mineral oil storage unit 1, a physical sedimentation tank 2, a flocculation precipitation unit 3, a fine filtration unit 4, a flash evaporation unit 5, a reduced pressure distillation unit 6, a clay decolorization unit 7, a filter pressing unit 8, an incineration plant 9, a wastewater tank 10, a light fuel oil storage tank 11, a finished base oil storage tank 12, a waste mineral oil storage tank 13, a first feed pump 14, a heating and stirring tank 16, a sedimentation tank 17, a first steam heat exchanger 18, a slag discharge pump 19, a transfer pump 20, a fine filter 21, a second feed pump 22, a flash tower 23, a second steam heat exchanger 24, a first cooler 25, a first elliptic gear flowmeter 26, a spiral plate heat exchanger 27, a vacuum film evaporator 28, a nano filter 29, a second condenser 30, a semi-finished product cache tank 31, a second elliptic gear flowmeter 32, a second heating and stirring tank 33, a third feed pump 34, a filter press 35, A third steam heat exchanger 36.
Detailed Description
To better illustrate the objects, technical solutions and advantages of the present invention, the present invention is further illustrated by the following examples. It is obvious that the following examples are only a part of the embodiments of the present invention, and not all of them. It should be understood that the embodiments of the present invention are only used for illustrating the technical effects of the present invention, and are not used for limiting the protection scope of the present invention.
Example 1
The embodiment provides a recovery system of waste mineral oil, as shown in fig. 1, the recovery system includes a waste mineral oil storage unit 1, a physical sedimentation tank 2, a flocculation precipitation unit 3, a fine filtration unit 4, a flash evaporation unit 5, a reduced pressure distillation unit 6, a clay decolorization unit 7, a filter pressing unit 8, a finished product storage unit, an incineration plant 9 and a waste water tank 10, and the finished product storage unit includes a light fuel oil storage tank 11 and a finished product base oil storage tank 12.
Specifically, the waste mineral oil storage unit 1 includes a waste mineral oil storage tank 13 and a first feed pump 14, a discharge port of the waste mineral oil storage tank 13 is connected with an inlet of the physical sedimentation tank 2, and the first feed pump 14 is provided on the discharge port of the waste mineral oil storage tank.
And conveying the waste residues generated by the physical sedimentation tank 2 to an incineration workshop 9 for incineration treatment, and allowing the physically settled waste mineral oil to enter a flocculation precipitation unit 3 for flocculation precipitation.
The flocculation precipitation unit 3 comprises a first heated stirred tank 16, a settling tank 17 and a first steam heat exchanger 18. The feed inlet of the first heating and stirring tank 16 is connected with the liquid discharge port of the physical sedimentation tank 2, the discharge port of the first heating and stirring tank 16 is connected with the feed inlet of the sedimentation tank 17, the sedimentation tank 17 is provided with the liquid discharge port connected with the fine filtration unit 4 and a slag discharge port for discharging precipitated waste slag, and the first steam heat exchanger 18 is connected with the first heating and stirring tank 16. A slag discharge pump 19 is arranged on a slag discharge port of the settling tank 17, and waste slag is discharged and then conveyed to an incineration workshop 9 for incineration treatment. A transfer pump 20 is arranged between the first heating and stirring tank 16 and the physical sedimentation tank 2, and the heating mode of the first heating and stirring tank 16 is inner coil heating.
The fine filtering unit 4 comprises a fine filter 21, and a liquid inlet of the fine filter 21 is connected with a liquid outlet of the settling tank 17. The aperture of the filter screen of the precision filter 21 is 0.05mm, and the filter screen is made of stainless steel. A second feeding pump 22 is arranged between the liquid inlet of the precision filter 21 and the liquid outlet of the settling tank 17.
The flash evaporation unit 5 comprises a flash evaporation tower 23, a second steam heat exchanger 24 and a first cooler 25, a liquid inlet of the flash evaporation tower 23 is connected with a filtrate outlet of the precision filter 21, an air outlet of the flash evaporation tower 23 is connected with the first cooler 25, the second steam heat exchanger 24 is connected with the flash evaporation tower 23, and a liquid inlet of the flash evaporation tower 23 is provided with a first elliptic gear flow meter 26. After the moisture and volatile organic compounds in the waste mineral oil are evaporated and vaporized in the flash tower 23, the water and the volatile organic compounds are discharged from an exhaust port of the flash tower 23 and enter the first cooler 25 for cooling treatment, the cooled liquid is discharged into the wastewater tank 10 and then enters a plant sewage treatment process, and the gas which is not cooled enters the incineration plant 9 for incineration treatment.
The reduced pressure distillation unit 6 includes a spiral plate heat exchanger 27, a vacuum thin film evaporator 28, a nano-filter 29, a second condenser 30, and a semi-finished product buffer tank 31. A liquid inlet of the spiral plate type heat exchanger 27 is connected with a liquid outlet of the flash tower 23, the liquid outlet of the spiral plate type heat exchanger 27 is connected with a feed inlet of a vacuum thin film evaporator 28, a light component discharge port of the vacuum thin film evaporator 28 is connected with a second condenser 30, and the second condenser 30 is connected with the light fuel oil storage tank 11. The heavy component discharge port of the vacuum film evaporator 28 is connected with a nanofiltration device 29, and the filtrate outlet of the nanofiltration device 29 is connected with a semi-finished product buffer tank 31. The feed inlet of the vacuum thin film evaporator 28 is provided with a second elliptical gear flowmeter 32, and the molecular weight cut-off of the nanofiltration device 29 is between 200 and 1000 Da. The waste mineral oil is heated by a plate coil heat exchanger 27 before entering the vacuum thin film evaporator 28.
The clay decoloring unit 7 comprises a second heating stirring tank 33 and a third steam heat exchanger 36, the third steam heat exchanger 36 is connected with the second heating stirring tank 33, a feed inlet of the second heating stirring tank 33 is connected with a liquid outlet of the semi-finished product cache tank 31, and a discharge outlet of the second heating stirring tank 33 is connected with the filter pressing unit 8. The second heating and stirring tank 33 is heated by an inner coil, and a third feeding pump 34 is arranged on a liquid inlet of the second heating and stirring tank 33.
The filter pressing unit 8 comprises a filter press 35, a liquid inlet of the filter press 35 is connected with a liquid outlet of the second heating and stirring tank 33, and the filter press 35 is a plate and frame filter press. The separated clay residue enters an incineration workshop 9 to be incinerated, and the separated decolorized base oil is stored in a finished base oil storage tank 12.
Example 2
The embodiment provides a recovery process of waste mineral oil, in particular to a recovery process by using the recovery system in embodiment 1, which comprises the following steps:
(1) storing the waste mineral oil to be recovered in a waste mineral oil storage tank;
(2) then entering a physical sedimentation tank for physical sedimentation to remove the waste water slag in the waste mineral oil;
(3) then the waste liquid enters a first heating and stirring tank of a flocculation precipitation unit, a flocculating agent is added, the waste liquid is pumped into a settling tank for settling separation after heating and stirring, the generated settling residue enters an incineration workshop for incineration treatment, and the upper-layer liquid enters a fine filtration unit; the flocculating agent can adopt water glass water solution with the density of 1.2g/mL, or active alkali with the purity of 90-96 percent, or polyamide resin with the molecular weight of 650, or sulfonic acid with the purity of 92-98 percent;
(4) after the upper layer liquid enters a fine filtering unit, filtering by a fine filter to remove impurities with the thickness of more than 0.05 mm;
(5) then the waste mineral oil enters a flash evaporation unit, moisture and volatile substances in the waste mineral oil are removed in a flash evaporation tower, the flash evaporation pressure is-0.8 kpa (-0.8kpa to-1.0 kpa), the temperature is 120 ℃ (110-120 ℃), the flow is controlled to be 3000L/h, the moisture and the volatile substances are evaporated and then enter a first condenser for condensation and recovery, the liquid condensed and liquefied is recovered into a waste water tank, and the gas which is not liquefied further enters an incineration workshop for incineration treatment;
(6) then the waste mineral oil enters a reduced pressure distillation unit, light components in the waste mineral oil are removed through a vacuum film evaporator, the pressure of reduced pressure distillation is-0.8 kpa (-0.8kpa to-1.0 kpa), the temperature is 220 ℃ (200 ℃ to 220 ℃), the flow is controlled at 2000L/h (2000L/h to 3000L/h), the light components are condensed and recovered to a light fuel oil storage tank, and heavy components enter a nanofiltration unit;
(7) after the heavy components enter a nanofiltration unit, filtering by a nanofiltration device with the molecular weight cutoff of 200-1000 Da, wherein the materials passing through the nanofiltration membrane are the regenerated base oil;
(8) the regenerated base oil enters a clay decoloring unit, and is mixed and stirred with clay for 30min in a second heating and stirring tank at 120 ℃ (110-130 ℃);
(9) and then the obtained mixture enters a filter pressing unit, solid-liquid separation is carried out through a plate-frame filter press, the separated clay residue enters an incineration workshop for incineration treatment, and the decolorized base oil obtained by separation is cooled and then stored in a finished base oil storage tank.
The results of the tests before and after the recovery of the waste mineral oil by using the recovery system and the recovery method of the present invention are shown in the following table:
from the above table of detection data, most of impurities in the regenerated base oil obtained by the recovery system and the recovery method of the invention are removed, and the quality of the decolorized base oil obtained by further bleaching with clay basically meets the specification of the lubricating oil base oil Q-SY 44-2009 standard, which shows that the recovery process and the recovery system of the invention can be used for efficiently recovering the waste mineral oil, and the obtained base oil has low impurity content and high quality, meets the national standard requirements, and can be directly applied.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A recovery system of waste mineral oil is characterized by comprising a physical sedimentation tank, a flocculation precipitation unit, a fine filtration unit, a flash evaporation unit, a reduced pressure distillation unit, a clay decolorization unit and a filter pressing unit which are connected in sequence; still include waste mineral oil memory cell, finished product memory cell, incineration plant and waste water tank, waste mineral oil memory cell with the physics sedimentation tank is connected, the finished product memory cell with the vacuum distillation unit with the filter-pressing unit is connected, the waste water tank with the flash distillation unit is connected.
2. The waste mineral oil recovery system of claim 1, wherein the flocculation unit comprises a first heated stirred tank, a settling tank, and a first steam heat exchanger; the feed inlet of first heating agitator tank with the leakage fluid dram of physics sedimentation tank is connected, the bin outlet of first heating agitator tank with the feed inlet of settling cask is connected, the settling cask be equipped with the leakage fluid dram that the unit is connected is strained to the essence and be used for discharging the row's cinder notch of deposiing the waste residue, first steam heat exchanger with first heating agitator tank connects.
3. The waste mineral oil recovery system of claim 2, wherein the flash distillation unit comprises a flash column, a second vapor heat exchanger and a first cooler, wherein the liquid inlet of the flash column is connected to the fine filtration unit, the gas outlet of the flash column is connected to the first cooler, and the second vapor heat exchanger is connected to the flash column.
4. The waste mineral oil recovery system of claim 3, wherein the vacuum distillation unit comprises a spiral plate heat exchanger, a vacuum thin film evaporator, a nano filter, a second condenser, and a semi-finished product buffer tank; the inlet of spiral plate heat exchanger with the leakage fluid dram of flash column is connected, spiral plate heat exchanger's leakage fluid dram with vacuum film evaporator's feed inlet is connected, vacuum film evaporator's light component bin outlet with the second condenser is connected, the second condenser is connected with light fuel oil storage jar, vacuum film evaporator's heavy component bin outlet with the nanofiltration ware is connected, receive the filtrating export of filter with semi-manufactured goods buffer tank connects.
5. The waste mineral oil recovery system of claim 4, wherein the clay decoloring unit comprises a second heating stirring tank and a third steam heat exchanger, the third steam heat exchanger is connected with the second heating stirring tank, a feed inlet of the second heating stirring tank is connected with a liquid outlet of the semi-finished product buffer tank, and a discharge outlet of the second heating stirring tank is connected with the filter pressing unit.
6. The waste mineral oil recovery system of claim 5, wherein the pressure filtration unit comprises a filter press having a liquid inlet connected to the liquid outlet of the second heated stirred tank.
7. The waste mineral oil recovery system of claim 1, wherein the waste mineral oil storage unit comprises a waste mineral oil storage tank and a first feed pump, wherein a discharge port of the waste mineral oil storage tank is connected to the physical sedimentation unit, and wherein the waste mineral oil discharge pump is provided at a discharge port of the waste mineral oil storage tank.
8. The waste mineral oil recovery system of claim 1, wherein the finished product storage unit comprises a light fuel oil storage tank connected to the vacuum distillation unit and a finished base oil storage tank connected to the filter press unit.
9. The waste mineral oil recovery system of claim 5 wherein the first heating agitator tank and the second heating agitator tank are heated by internal coil heating.
10. The waste mineral oil recovery system of claim 4, wherein the nanofilter has a molecular weight cut-off of between 200 and 1000 Da.
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| CN201922455197.9U CN211713018U (en) | 2019-12-30 | 2019-12-30 | Recovery system of waste mineral oil |
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| CN201922455197.9U CN211713018U (en) | 2019-12-30 | 2019-12-30 | Recovery system of waste mineral oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114989861A (en) * | 2022-05-18 | 2022-09-02 | 余金珠 | Recycling system of waste mineral oil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114989861A (en) * | 2022-05-18 | 2022-09-02 | 余金珠 | Recycling system of waste mineral oil |
| CN114989861B (en) * | 2022-05-18 | 2024-02-09 | 梁山德润能源有限公司 | Recycling system of waste mineral oil |
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