Novel distillation retort

Abstract

The utility model discloses a novel distillation retort which comprises a retort body, a buffer retort and a vacuum retort, the inlet end of the buffer retort is connected to the outlet end of the vacuum retort, the outlet end of the buffer retort is connected with the inlet end of the retort body, a first valve body and a solvent pump are installed between the outlet end of the buffer retort and the inlet end of the retort body, and the retort body is connected with a waste discharge pipe and a steam pipe. A first steam valve and a second steam valve are installed on the steam pipe, one end of the steam pipe is connected with a vacuum tank main pipe, one end of the vacuum tank main pipe is connected with the inlet end of the vacuum tank, and a vacuum tank main valve is installed at one end of the vacuum tank main pipe. If the liquid in the buffer tank is completely pumped into the independent distillation retort, a heat conduction oil pipe, a temperature probe, a vacuum pressure probe, an upper liquid level meter, a lower liquid level meter and the like are arranged in the distillation retort to form an independent standing external evaporator, and the standing evaporator has the characteristic that the larger the surface area of the evaporator is, the better the evaporation effect is.

Description

Technical Field

[0001] The utility model relates to the technical field of vapor phase drying systems, in particular to a novel distillation tank. Background Art

[0002] In solvent vapor phase drying systems, it is sometimes necessary to dry the transformer body with oil, or simply to clean the transformer oil from the transformer body with a solvent. During the drying or cleaning process, a large amount of transformer oil is mixed into the solvent solution. Generally, the transformer oil content accounts for 5% to 8% of the weight of the transformer body insulation, which is still a large amount.

[0003] When these transformer oils are mixed with solvents, the solvent vapor pressure will decrease, the temperature of the transformer body will heat up slowly, or even drop. This is the reason why the solvent vapor volume is too low and the transformer oil content is too high. Transformer oil and solvent are mutually soluble and have similar specific gravities and densities, making them impossible to separate by density difference.

[0004] Distillation separation is only achieved through the difference in temperature of the distillation point.

[0005] In a conventional vapor phase drying system, a waterfall evaporator in a tank is used to perform distillation in the early heating stage, and the remaining mixed solution is discharged into a waste oil tank according to the changes in the temperature and pressure of the remaining mixed solvent.

[0006] The disadvantages of this fractionation method are: the equipment is inflexible and can only be used during the heating phase. If a single fraction is planned, the entire vacuum tank must be heated, which is a significant waste of energy. Furthermore, due to the waterfall-like evaporation fractionation method, transformer oil also participates in the flow and sprays onto the bottom of the vacuum tank. Since transformer oil is not very volatile, opening the vacuum tank creates heavy smoke in the workshop and a large amount of oil residue on the tank bottom, which can easily cause the tracks inside the tank to slip. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the utility model provides a new distillation tank, which solves the problem that in the existing solvent vapor phase drying system, when transformer oil is mixed with the solvent, the solvent vapor pressure will be reduced, the temperature of the device body will be heated slowly, or even cooled.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions. The present invention provides a new distillation tank, including a tank body, a buffer tank and a vacuum tank. The inlet end of the buffer tank is connected to the outlet end of the vacuum tank, the outlet end of the buffer tank is connected to the inlet end of the tank body and a first valve body and a solvent pump are installed therebetween. A waste pipe and a steam pipe are connected to the tank body. A first steam valve and a second steam valve are installed on the steam pipe. One end of the steam pipe is connected to the vacuum tank main pipe, one end of the vacuum tank main pipe is connected to the inlet end of the vacuum tank and a vacuum tank main valve is installed. The other end of the vacuum tank main pipe is connected to the main condenser.

[0009] Preferably, an upper liquid level gauge and a lower liquid level gauge are provided on one side of the tank body, a vacuum pressure probe and a temperature probe are provided on the upper end of the tank body, a heat transfer oil pipe is installed inside the tank body, and a waste oil pump and a waste oil valve are installed on the waste pipe.

[0010] Preferably, a tube body is installed on the liquid outlet of the main condenser, and the tube body is provided with a liquid outlet valve, a liquid level observation window and a connecting valve.

[0011] Beneficial effects

[0012] The utility model provides a novel distillation tank, which has the following beneficial effects:

[0013] If the mixed solvent requires fractional distillation, the liquid in the buffer tank is completely pumped into a separate distillation tank. A heat transfer oil pipe, temperature probe, vacuum pressure probe, and upper and lower liquid level gauges are installed in the distillation tank to form an independent, static, external evaporator. The characteristic of a static evaporator is that the larger the evaporator surface area, the better the evaporation effect. Therefore, the evaporator is designed in a semicircular shape, with the arc facing upward. The heat transfer oil pipe is installed at the bottom of the semicircle. After the mixed solution is heated, the solvent first evaporates into solvent vapor as the temperature rises and the pressure decreases, depending on the fractionation point. Under the action of vacuum, the solvent vapor condenses into liquid in the condenser for recycling. When the temperature of the mixed solution rises above 128°C and the pressure in the distillation tank drops below 25 mbar, the distillation process is terminated. The remaining liquid is considered waste and is discharged to the waste oil tank using a waste oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] In the figure: 1. Buffer tank; 2. Solvent pump; 3. First valve body; 4. Upper liquid level gauge; 5. Lower liquid level gauge; 6. Tank body; 7. Waste oil valve; 8. Waste oil pump; 9. Temperature probe; 10. Vacuum pressure probe; 11. First steam valve; 12. Second steam valve; 13. Main condenser; 14. Liquid outlet valve; 15. Liquid level observation window; 16. Connecting valve; 17. Vacuum tank main valve. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1 The utility model provides a technical solution: a new distillation tank, comprising a tank body 6, a buffer tank 1 and a vacuum tank, the inlet end of the buffer tank 1 being connected to the outlet end of the vacuum tank, the outlet end of the buffer tank 1 being connected to the inlet end of the tank body 6 and a first valve body 3 and a solvent pump 2 being installed therebetween, the tank body 6 being connected to a waste pipe and a steam pipe, the steam pipe being installed with a first steam valve 11 and a second steam valve 12, one end of the steam pipe being connected to a vacuum tank main pipe, one end of the vacuum tank main pipe being connected to the inlet end of the vacuum tank and a vacuum tank main valve 17 being installed, the other end of the vacuum tank main pipe being connected to a main condenser 13; a heat transfer oil pipe is provided in the tank body 6, mainly for heating the tank body 6, the use of heat transfer oil belongs to an existing mature technology, so there is no need to describe the heat transfer oil and its filling equipment in detail; the characteristic of the tank body 6 is that the larger the surface area, the better the evaporation effect, therefore, the tank body 6 is designed to be semicircular, with the arc facing upwards and a heat transfer oil pipe installed at the bottom of the semicircle.

[0018] Furthermore, an upper liquid level gauge 4 and a lower liquid level gauge 5 are provided on one side of the tank body 6, a vacuum pressure probe 10 and a temperature probe 9 are provided at the upper end of the tank body 6, a heat transfer oil pipe is installed inside the tank body 6, and a waste oil pump 8 and a waste oil valve 7 are installed on the waste pipe.

[0019] Furthermore, a pipe body is installed on the liquid outlet of the main condenser 13 , and the pipe body is provided with a liquid outlet valve 14 , a liquid level observation window 15 and a connecting valve 16 .

[0020] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process.

[0021] Example: When in use, the solvent in the buffer tank 1 is pumped into the tank body 6 by the solvent pump 2. When the upper liquid level gauge 4 in the tank body 6 lights up, the tank body 6 is heated and the vacuum tank main valve 17 is closed at the same time. Since solvent vapor is generated in the tank body 6, the vacuum pressure probe 10 and the temperature probe 9 begin to rise, and the second steam valve 12 is opened. Under the action of vacuum, the steam passes through the main condenser 13 and is condensed into liquid. It automatically flows into the collection tank along the liquid outlet valve 14, the liquid level observation window 15 and the connecting valve 16 (the collection tank is an existing equipment used to collect liquids and is not the key point of this design, so there is no need to describe its structure and function in detail) for reuse.

[0022] As the steam in the tank body 6 is pumped out, the pressure in the tank body 6 begins to drop, but the temperature of the remaining mixed liquid slowly increases. When the temperature rises to above 128°C and the pressure in the tank body 6 drops below 25mbar, the liquid in the tank body 6 can be discharged into the waste oil tank by the waste oil pump 8 (the waste oil tank is an existing equipment used to collect waste oil and is not a key point of this design, so there is no need to describe its structure and function in detail). When the lower liquid level gauge 5 is lit, the discharge is stopped.

[0023] The above is the entire distillation process, which is also the process of purifying the solvent.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel distillation tank, comprising a tank body (6), a buffer tank (1) and a vacuum tank, wherein the inlet end of the buffer tank (1) is connected to the outlet end of the vacuum tank, characterized in that: The outlet end of the buffer tank (1) is connected to the inlet end of the tank body (6), and a first valve body (3) and a solvent pump (2) are installed therebetween; a waste pipe and a steam pipe are connected to the tank body (6); a first steam valve (11) and a second steam valve (12) are installed on the steam pipe; one end of the steam pipe is connected to a vacuum tank main pipe; one end of the vacuum tank main pipe is connected to the inlet end of the vacuum tank and is installed with a vacuum tank main valve (17); and the other end of the vacuum tank main pipe is connected to a main condenser (13).

2. A novel distillation tank according to claim 1, characterized in that: An upper liquid level gauge (4) and a lower liquid level gauge (5) are provided on one side of the tank body (6), a vacuum pressure probe (10) and a temperature probe (9) are provided at the upper end of the tank body (6), a heat transfer oil pipe is installed inside the tank body (6), and a waste oil pump (8) and a waste oil valve (7) are installed on the waste pipe.

3. A novel distillation tank according to claim 1, characterized in that: A pipe body is installed on the liquid outlet of the main condenser (13), and the pipe body is provided with a liquid outlet valve (14), a liquid level observation window (15) and a connecting valve (16).

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