CN218686431U - Pressure reduction distillation device for regeneration of waste lubricating oil - Google Patents

Abstract

The utility model relates to a chemical device, in particular to a reduced pressure distillation device for regeneration of waste lubricating oil, which comprises a tank body, wherein the upper part of the tank body is provided with a tank top gas phase discharging pipe and a feeding pipe in sequence from top to bottom, and the top of the tank body is provided with a stirring motor; a feeding distribution disc, a stirring shaft, a stirring paddle and a stirring rod are arranged in the tank body, the stirring motor is connected with the stirring shaft, the stirring paddle is installed at the lower part of the stirring shaft, the stirring rod is arranged at the bottom of the stirring paddle, the feeding distribution disc is arranged on the stirring shaft and is arranged below the feeding pipe, and the feeding distribution disc is a conical feeding distribution disc; the bottom of the tank body is provided with a sedimentation pipe, and a discharge pipe is arranged on the sedimentation pipe. The utility model discloses can prevent that the impurity deposit from blockking up, improve the pull-out rate of decompression distillation.

Description

Pressure reduction distillation device for regeneration of waste lubricating oil

Technical Field

The utility model relates to a chemical industry device, concretely relates to a vacuum distillation device for useless lubricating oil is regenerated.

Background

In the using process of the lubricating oil, the lubricating oil is affected by high-temperature catalytic oxidation and pollution impurities such as metal powder, moisture, dust and the like brought by external environment and mechanical abrasion, so that the lubricating oil has the effects of gradually reducing lubrication, auxiliary cooling, rust prevention, cleaning, sealing, buffering and the like, and finally becomes waste lubricating oil which cannot be used continuously. The waste lubricating oil contains various substances harmful to human bodies, such as polycyclic aromatic hydrocarbon, polychlorinated biphenyl, heavy metal ultrafine particles and the like, and if the waste lubricating oil is incinerated or discarded, serious pollution to water sources, soil and air is caused. However, the vast majority of the most valuable lubricant base oil components of the spent lubricant can be refined by suitable processes for reuse. The waste lubricating oil is recycled, so that the method is beneficial to saving resources, changing waste into valuable, preventing environmental pollution and having considerable economic and social benefits.

In the recycling of the waste lubricating oil, distillation is an important unit process, which can be used for separating light and heavy fractions and removing impurity components in the waste lubricating oil, and asphaltene, colloid, additives, heavy metal inorganic salts and the like in the waste lubricating oil are remained in distillation residues and separated from distillate oil, however, in the separation process, if the substances remained in the distillation residues cannot be discharged in time, the problems of corrosion and deposition blockage are caused to distillation equipment, and the continuous operation of a distillation device is influenced.

The existing vacuum distillation device for the waste lubricating oil adopts the same device as the conventional petroleum refining process, but the impurities in the waste lubricating oil are not existed in the petroleum refining process, so the device design adopting the same device is not applicable, and the device is also one of the reasons that the vacuum distillation device for the waste lubricating oil is easy to generate impurity deposition and blockage, therefore, the vacuum distillation device for the waste lubricating oil regeneration is needed to be designed to solve the problems.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the reduced pressure distillation device for regenerating the waste lubricating oil can prevent impurity deposition and blockage and improve the extraction rate of reduced pressure distillation.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model discloses a vacuum distillation device for regeneration of waste lubricating oil, which comprises a tank body, wherein a tank top gas phase discharging pipe and a feeding pipe are sequentially arranged on the upper part of the tank body from top to bottom, and a stirring motor is arranged on the top of the tank body; a feeding distribution disc, a stirring shaft, a stirring paddle and a stirring rod are arranged in the tank body, the stirring motor is connected with the stirring shaft, the stirring paddle is installed at the lower part of the stirring shaft, the stirring rod is arranged at the bottom of the stirring paddle, the feeding distribution disc is arranged on the stirring shaft and is arranged below the feeding pipe, and the feeding distribution disc is a conical feeding distribution disc; the bottom of the tank body is provided with a sedimentation pipe, and a discharge pipe is arranged on the sedimentation pipe.

The feeding distribution disc comprises a distribution table and a conical distribution disc, the conical distribution disc surrounds the distribution table, and the conical distribution disc is arranged at the bottom of the distribution table.

The distribution table is provided with mounting holes.

The conical distribution disc is provided with small holes.

The included angle between the conical surface of the conical distribution disc and the horizontal plane is 5-15 degrees, and preferably 15 degrees.

The stirring paddle is a propelling stirring paddle.

The stirring rod is an eccentric stirring rod.

The sedimentation pipe is provided with a first valve, a discharge pipe and a second valve from top to bottom in sequence.

The utility model discloses an impulse type stirring rake to set up eccentric stirring rod in the bottom of stirring rake, be used for playing the effect of carrying out the supplementary stirring to decompression distillation plant bottom blind spot. When the eccentric stirring rod is installed, the central position of the stirring paddle is avoided.

The feeding distribution disc is fixed on the stirring shaft.

The discharge pipe is used for extracting materials at the bottom of the tank; the sedimentation pipe is used for discharging excessive sedimentation impurities in the tank smoothly, and the discharge pipe is prevented from being blocked.

The first valve is used for cutting off the discharge of the reduced pressure distillation device when the settling tube discharges impurities.

The lower part of the settling pipe is provided with a second valve for cutting off the connection between the reduced pressure distillation device and the outside during operation, and the vacuum state of the reduced pressure distillation device during operation is prevented from being damaged.

The working principle and the process are as follows:

waste lubricating oil materials enter a tank body from a feeding pipe, a stirring shaft is driven by a stirring motor to rotate, so that a feeding distribution disc, a stirring paddle and a stirring rod are driven to rotate, the waste lubricating oil entering the tank body is stirred, the stirring paddle can reciprocate up and down under the rotation of the stirring shaft, the waste lubricating oil in the tank body is distilled, distilled gas phase components are discharged from a gas phase discharging pipe at the top of the tank, viscous residual oil and solid impurity materials at the bottom of the tank body enter a settling pipe to be separated and settled, and residual oil components are discharged from a discharging pipe; when the solid impurities in the settling tube need to be discharged, the first valve can be temporarily closed, and the second valve is opened to discharge the solid impurities in the settling tube; and after the impurities are discharged, closing the second valve and opening the first valve, thereby recovering the normal operation of the reduced pressure distillation device.

The utility model discloses the beneficial effect who has is:

1. the utility model discloses set up toper feeding distribution dish on the central (mixing) shaft in the jar to adjusted the contained angle of the distribution dish conical surface and horizontal plane, the inlet pipe is located the top of feeding distribution dish, can evenly distributed on rotatory feeding distribution dish when the material feeding, improves the mass transfer heat transfer effect of material in the vacuum distillation process, improves the pull-out rate of vacuum distillation.

2. The utility model discloses a impulse type stirring rake to set up eccentric stirring rod below the (mixing) shaft, can better the sticky material of bottom in the hybrid tank, prevent when reinforcing tank bottoms heat transfer effect that the impurity that produces from stopping up the ejection of compact pipeline of tank bottoms in the vacuum distillation process. The eccentric stirring rod arranged at the bottom of the stirring paddle can assist in stirring the place which cannot be contacted by the stirring paddle, and further prevents impurities at the bottom of the tank from blocking a discharging pipeline.

3. The utility model discloses set up discharging pipe and sedimentation pipe in the tank bottoms portion to and corresponding connection valve. The liquid phase at the bottom of the tank is discharged through the discharge pipe, solid particle impurities carried in the liquid phase material can be settled and separated in the settling pipe, and the discharge pipeline is prevented from being blocked; when the impurities in the settling tube need to be discharged regularly, the first valve can be closed, and the second valve is opened to discharge the impurities deposited in the settling tube.

4. The utility model discloses a set up the mode that feeding distribution dish, impulse type stirring rake, eccentric stirring rod, discharging pipe and settling leg combined together, not only strengthened the mass transfer heat transfer effect of vacuum distillation, can prevent moreover that vacuum residue oil and impurity from causing the problem of vacuum distillation device ejection of compact jam in vacuum distillation device bottom deposit, and then improved useless lubricating oil vacuum distillation device's continuous operation cycle.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of a feed distribution tray;

in the figure: 1. a tank body; 2. a feed pipe; 3. a stirring motor; 4. a feed distribution tray; 5. a stirring shaft; 6. a stirring paddle; 7. a stirring rod; 8. a discharge pipe; 9. a settling tube; 10. a first valve; 11. a second valve; 12. a tank top gas phase discharge pipe; 13. a distribution table; 14. a conical distribution disk; 15. mounting holes; 16. and (4) a small hole.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings:

as shown in figure 1, the utility model comprises a tank body 1, a tank top gas phase discharging pipe 12 and a feeding pipe 2 are sequentially arranged on the upper part of the tank body 1 from top to bottom, and a stirring motor 3 is arranged on the top of the tank body 1; a feeding distribution disc 4, a stirring shaft 5, a stirring paddle 6 and a stirring rod 7 are arranged in the tank body 1, the stirring motor 3 is connected with the stirring shaft 5, the stirring paddle 6 is arranged at the lower part of the stirring shaft 5, the stirring rod 7 is arranged at the bottom of the stirring paddle 6, the feeding distribution disc 4 is arranged on the stirring shaft 5, the feeding distribution disc 4 is arranged below the feeding pipe 2, and the feeding distribution disc 4 is a conical feeding distribution disc; the bottom of the tank body 1 is provided with a sedimentation pipe 9, and the sedimentation pipe 9 is provided with a discharge pipe 8.

The feeding distribution disc 4 comprises a distribution table 13 and a conical distribution disc 14, the conical distribution disc 14 is arranged around the distribution table 13, and the conical distribution disc 14 is arranged at the bottom of the distribution table 13.

The distribution table 13 is provided with mounting holes 15.

The conical distribution plate 14 is provided with small holes 16.

The angle between the conical surface of the conical distribution disc 14 and the horizontal plane is 15 degrees.

The stirring paddle 6 is a push type stirring paddle.

The stirring rod 7 is an eccentric stirring rod.

The settling pipe 9 is provided with a first valve 10, a discharge pipe 8 and a second valve 11 from top to bottom in sequence.

Waste lubricating oil materials enter a tank body 1 from a feeding pipe 2 at a flow rate of 20L/h, a stirring shaft 5 is driven by a stirring motor 3 to rotate, so that a feeding distribution disc 4, a stirring paddle 6 and a stirring rod 7 are driven to rotate, the waste lubricating oil entering the tank body 1 is stirred, the stirring paddle 6 can reciprocate up and down under the rotation of the stirring shaft 7, the waste lubricating oil in the tank body 1 is distilled, distilled gas phase components are discharged from a tank top gas phase discharging pipe 12, the distillate oil extraction rate can reach 90%, sticky residual oil and solid impurity materials at the bottom of the tank body 1 enter a settling pipe 9 to be separated and settled, and residual oil components are discharged from a discharging pipe 8; when the solid impurities in the settling tube 9 need to be discharged, the first valve 10 can be temporarily closed, and the second valve 11 is opened to discharge the solid impurities in the settling tube 9; after the impurities are discharged, the second valve 11 is closed, and the first valve 10 is opened, thereby restoring the normal operation of the vacuum distillation apparatus.

The existing waste lubricating oil vacuum distillation device can be continuously operated for 45 days at most and needs to be shut down, cleaned and overhauled once, and the utility model can prolong the continuous operation time to 180 days.

Claims (9)

1. A reduced pressure distillation device for regeneration of waste lubricating oil comprises a tank body (1), and is characterized in that a tank top gas phase discharge pipe (12) and a feed pipe (2) are sequentially arranged on the upper part of the tank body (1) from top to bottom, and a stirring motor (3) is arranged on the top of the tank body (1); a feeding distribution disc (4), a stirring shaft (5), a stirring paddle (6) and a stirring rod (7) are arranged in the tank body (1), a stirring motor (3) is connected with the stirring shaft (5), the stirring paddle (6) is installed on the lower portion of the stirring shaft (5), the stirring rod (7) is arranged at the bottom of the stirring paddle (6), the feeding distribution disc (4) is arranged on the stirring shaft (5), the feeding distribution disc (4) is arranged below the feeding pipe (2), and the feeding distribution disc (4) is a conical feeding distribution disc; a sedimentation pipe (9) is arranged at the bottom of the tank body (1), and a discharge pipe (8) is arranged on the sedimentation pipe (9).

2. A vacuum distillation apparatus for spent lubricating oil regeneration according to claim 1, wherein the feed distribution tray (4) comprises a distribution table (13) and a conical distribution tray (14), the conical distribution tray (14) being arranged around the distribution table (13), the conical distribution tray (14) being arranged at the bottom of the distribution table (13).

3. A vacuum distillation apparatus for spent lubricating oil regeneration according to claim 2, wherein the distribution table (13) is provided with mounting holes (15).

4. A vacuum distillation apparatus for spent lubricating oil regeneration according to claim 2, wherein the conical distribution disc (14) is provided with small holes (16).

5. A vacuum distillation apparatus for spent lubricating oil regeneration according to claim 2, wherein the angle between the conical surface of the conical distribution disc (14) and the horizontal plane is 5-15 °.

6. A vacuum distillation unit for the regeneration of used lubricating oil according to claim 5, characterized in that the angle between the conical surface of the conical distribution plate (14) and the horizontal plane is 15 °.

7. A vacuum distillation unit for the regeneration of spent lubricating oil according to claim 1, wherein the paddles (6) are propeller type paddles.

8. A vacuum distillation apparatus for spent lubricating oil regeneration according to claim 1, wherein the stirring rod (7) is an eccentric stirring rod.

9. A vacuum distillation unit for regeneration of spent lubricating oil according to claim 1, characterised in that the settling leg (9) is provided with a first valve (10), an outlet tube (8) and a second valve (11) in this order from top to bottom.

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