Dearomatization device for n-heptane solvent oil

Abstract

The utility model relates to a dearomatization device for n-heptane solvent naphtha, which comprises a dearomatization tower, a ceramic ball filler and an adsorbent assembly, and is technically characterized in that the adsorbent assembly comprises a flat column-shaped frame, a filter screen and an aromatic hydrocarbon adsorbent, an upper limiting ring and a lower limiting ring are arranged in the middle of the inner wall of the dearomatization tower, and the adsorbent assembly is clamped between the upper limiting ring and the lower limiting ring; the outer wall of the dearomatization tower is provided with a U-shaped pick-and-place port corresponding to the adsorbent assembly, the outer end of the U-shaped pick-and-place port is provided with a sealing cover, the inner side face of the sealing cover is fixedly provided with a heat preservation block, the inner side face of the heat preservation block is a semicircular arc face, a steel plate is fixed to the semicircular arc face, and the steel plate and the inner wall of the dearomatization tower are buckled to form a circular containing area corresponding to the adsorbent assembly. The upper part of the dearomatization tower is filled with one part of the ceramic ball filler, the lower part of the dearomatization tower is filled with the other part of the ceramic ball filler, and a plurality of heating rod positioning cavities are uniformly formed in the upper part and the lower part of the dearomatization tower respectively. The device solves the problem that the existing aromatic hydrocarbon adsorbent is inconvenient to replace, and is convenient to operate and convenient to regenerate.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a dearomatization device for n-heptane solvent oil. Background Art

[0002] When dearomatizing n-heptane solvent oil, n-heptane solvent oil enters from the bottom of the dearomatizing tower (filled with porcelain balls and adsorbents), so that n-heptane is evenly distributed through the aromatic adsorbent, and the dearomatized n-heptane flows out from the top of the dearomatizing tower. When the adsorbent is saturated, it is regenerated with hot nitrogen at a temperature of 150°C, and the adsorbent can be recycled.

[0003] CN 209210726 U discloses a dearomatization device for n-heptane solvent oil, which includes a dearomatization tower, a raw material inlet, a n-heptane outlet, porcelain balls and an adsorbent. A raw material inlet is provided at the lower end of the dearomatization tower, a n-heptane outlet is provided at the top of the dearomatization tower, the inner side of the dearomatization tower is filled with porcelain balls and an adsorbent, and a filling material outlet is provided through the other side of the bottom end of the dearomatization tower; the device is provided with a transition pipeline at the upper end of the dearomatization tower, which leads to two different filter tanks respectively, and the multi-layer filter layers provided in the filter tank, when replacing, the upper filter layer is placed at the bottom layer, which can increase the utilization rate of the filter layer, and when replacing the filter device, the two filter devices will not affect the normal progress of the reaction, and a primary screen is provided at the bottom of the device to perform primary screening of the dearomatization filler, and the filler inside can be preliminarily screened, which is convenient for operation. However, there are still the following problems during use: it is inconvenient to replace the adsorbent that cannot be reused. Utility Model Content

[0004] The utility model aims to provide a dearomatization device for n-heptane solvent oil with reasonable structure and reliable use, so as to solve the problem of inconvenient replacement of existing aromatic adsorbents, facilitate operation and also facilitate the regeneration of the adsorbent.

[0005] The technical solution of the utility model is:

[0006] A dearomatization device for n-heptane solvent oil comprises a dearomatization tower, a ceramic ball filler and an adsorbent assembly arranged in the dearomatization tower, the dearomatization tower is provided with a raw material inlet at the bottom and an n-heptane outlet at the top, and the technical key points are: the adsorbent assembly comprises a flat column frame, a filter screen arranged outside the flat column frame, and an aromatic adsorbent arranged in a cavity of the filter screen, an upper limit ring and a lower limit ring are arranged in the middle of the inner wall of the dearomatization tower, the adsorbent assembly is clamped between the upper and lower limit rings, and the dearomatization tower A U-shaped access opening corresponding to the adsorbent assembly is provided on the outer wall, a sealing cover is provided at the outer end of the U-shaped access opening, an insulation block is fixed on the inner side surface of the sealing cover, the inner side surface of the insulation block is a semicircular arc surface and a steel plate is fixed on the semicircular arc surface, the steel plate is buckled with the inner wall of the dearomatization tower to form a circular containing area corresponding to the adsorbent assembly, a part of the ceramic ball filler is filled in the upper part of the dearomatization tower, and the other part is filled in the lower part of the dearomatization tower, and a plurality of heating rod positioning cavities are evenly built in the upper and lower parts of the dearomatization tower.

[0007] In the above-mentioned dearomatization device for n-heptane solvent oil, the raw material inlet is connected with the feed pipeline and the nitrogen inlet pipeline by means of a tee.

[0008] In the above-mentioned dearomatization device for n-heptane solvent oil, the n-heptane outlet is connected with the discharge pipeline and the aromatics removal pipeline by means of a tee.

[0009] In the above-mentioned dearomatization device for n-heptane solvent oil, the heating rod positioning cavity is a longitudinal positioning cavity, the heating rod is inserted into the longitudinal positioning cavity from top to bottom or from bottom to top, and a fixing platform corresponding to the end of the heating rod is provided at the top or bottom of the dearomatization tower.

[0010] In the above-mentioned dearomatization device for n-heptane solvent oil, an upper limit plate corresponding to the ceramic ball filler is fixed above the upper limit ring, and a lower baffle plate corresponding to the ceramic ball filler is fixed below the lower limit ring, and flow holes are evenly distributed on the upper limit plate and the lower baffle plate.

[0011] The beneficial effects of the utility model are:

[0012] 1. When the aromatic adsorbent can no longer be used, open the cover and take out the adsorbent assembly through the U-shaped access port, which solves the problem of inconvenient replacement of the existing aromatic adsorbent and is easy to operate.

[0013] 2. When it is necessary to remove the aromatic components in the adsorbent, each heating rod is electrically heated and transfers heat to the ceramic ball filler, thereby heating the adsorbent. After reaching the set temperature, nitrogen is introduced to remove the aromatic components from the adsorbent using nitrogen, which is convenient for regeneration of the adsorbent. There is no need to use heating equipment to heat the nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Middle AA section view;

[0016] Figure 3 yes Figure 1 A partial enlarged view of .

[0017] In the figure: 1. discharge pipeline, 2. aromatics removal pipeline, 3. n-heptane outlet, 4. dearomatization tower, 5. fixed platform, 6. heating rod positioning cavity, 7. heating rod, 8. ceramic ball filler, 9. aromatics adsorbent, 10. raw material inlet, 11. cover, 12. insulation block, 13. steel plate, 14. U-shaped access port, 15. flat column frame, 16. upper limit ring, 17. upper limit plate, 18. lower limit ring, 19. lower baffle, 20. filter screen. DETAILED DESCRIPTION

[0018] The utility model is described in detail according to the accompanying drawings of the specification.

[0019] like Figure 1 to Figure 3 As shown, the dearomatization device of n-heptane solvent oil comprises a dearomatization tower 4, a ceramic ball filler 8 and an adsorbent assembly arranged in the dearomatization tower 4. The dearomatization tower 4 is provided with a raw material inlet 10 at the bottom and an n-heptane outlet 3 at the top.

[0020] The adsorbent assembly includes a flat cylindrical frame 15, a filter screen 20 arranged outside the flat cylindrical frame 15, and an aromatic adsorbent 9 arranged in the containing cavity of the filter screen 20. An upper limit ring 16 and a lower limit ring 18 are provided in the middle of the inner wall of the dearomatization tower 4, and the adsorbent assembly is clamped between the upper and lower limit rings 16, 18. A U-shaped access opening 14 corresponding to the adsorbent assembly is provided on the outer wall of the dearomatization tower 4, and a cover 11 is provided at the outer end of the U-shaped access opening 14. An insulation block 12 is fixed to the inner side surface of the cover 11. The inner side surface of the insulation block 12 is a semicircular arc surface and a steel plate 13 is fixed on the semicircular arc surface. The steel plate 13 is buckled with the inner wall of the dearomatization tower 4 to form a circular containing area corresponding to the adsorbent assembly.

[0021] Part of the ceramic ball filler 8 is filled in the upper part of the dearomatization tower 4, and the other part is filled in the lower part of the dearomatization tower 4. The upper and lower parts of the dearomatization tower 4 are respectively and evenly built with a plurality of heating rod positioning cavities 6. The heating rod positioning cavity 6 is a longitudinal positioning cavity, and the heating rod 7 is inserted into the longitudinal positioning cavity from top to bottom or from bottom to top. A fixing table 5 corresponding to the end of the heating rod 7 is provided at the top or bottom of the dearomatization tower 4. An upper limit plate 17 corresponding to the ceramic ball filler 8 is fixed above the upper limit ring 16, and a lower baffle 19 corresponding to the ceramic ball filler 8 is fixed below the lower limit ring 18. The upper limit plate 17 and the lower baffle 19 are respectively and evenly distributed with flow holes.

[0022] In this embodiment, the raw material inlet 10 is connected to the feed pipeline and the nitrogen inlet pipeline by a tee. The n-heptane outlet 3 is connected to the discharge pipeline 1 and the aromatics removal pipeline 2 by a tee.

[0023] Working principle:

[0024] During normal operation, the material enters the lower part of the dearomatization tower 4 through the raw material inlet 10, and enters the adsorbent assembly after being evenly distributed through the ceramic ball filler 8. The aromatic adsorbent 9 adsorbs the aromatic components in the material, and the n-heptane passes through the ceramic ball filler 8 and is discharged from the n-heptane outlet 3 to the discharge pipeline 1.

[0025] When it is necessary to remove the aromatic components in the aromatic adsorbent 9, each heating rod 7 is electrically heated and transfers heat to the ceramic ball filler 8, thereby also heating the aromatic adsorbent 9. After reaching the set temperature, nitrogen is introduced and the aromatic components are removed from the aromatic adsorbent 9 by nitrogen, which is convenient for the regeneration of the aromatic adsorbent. There is no need to use heating equipment to heat the nitrogen.

[0026] When the aromatic hydrocarbon adsorbent 9 can no longer be used, the cover 11 is opened, the adsorbent assembly is taken out through the U-shaped access opening 14, and a new adsorbent assembly is replaced, which solves the problem of inconvenient replacement of the existing aromatic hydrocarbon adsorbent and is easy to operate.

[0027] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A dearomatization device for n-heptane solvent oil, comprising a dearomatization tower, a ceramic ball filler and an adsorbent assembly arranged in the dearomatization tower, wherein the dearomatization tower is provided with a raw material inlet at the bottom and an n-heptane outlet at the top, characterized in that: The adsorbent assembly includes a flat cylindrical frame, a filter screen arranged outside the flat cylindrical frame, and an aromatic adsorbent arranged in the filter screen containing cavity. An upper limit ring and a lower limit ring are arranged in the middle of the inner wall of the dearomatization tower, and the adsorbent assembly is clamped between the upper and lower limit rings. A U-shaped access opening corresponding to the adsorbent assembly is arranged on the outer wall of the dearomatization tower, and a sealing cover is arranged at the outer end of the U-shaped access opening. An insulation block is fixed on the inner side surface of the sealing cover. The inner side surface of the insulation block is a semicircular arc surface and a steel plate is fixed on the semicircular arc surface. The steel plate is buckled with the inner wall of the dearomatization tower to form a circular containing area corresponding to the adsorbent assembly. A part of the porcelain ball filler is filled in the upper part of the dearomatization tower, and the other part is filled in the lower part of the dearomatization tower. A plurality of heating rod positioning cavities are evenly built in the upper and lower parts of the dearomatization tower.

2. The dearomatization device for n-heptane solvent oil according to claim 1, characterized in that: The raw material inlet is connected with the feed pipeline and the nitrogen inlet pipeline by means of a tee.

3. The dearomatization device of n-heptane solvent oil according to claim 1, characterized in that: The n-heptane outlet is connected with the discharge pipeline and the aromatics removal pipeline by means of a tee.

4. The dearomatization device for n-heptane solvent oil according to claim 1, characterized in that: The heating rod positioning cavity is a longitudinal positioning cavity, and the heating rod is inserted into the longitudinal positioning cavity from top to bottom or from bottom to top. A fixing platform corresponding to the end of the heating rod is provided at the top or bottom of the dearomatization tower.

5. The dearomatization device for n-heptane solvent oil according to claim 1, characterized in that: An upper limit plate corresponding to the ceramic ball filler is fixed above the upper limit ring, and a lower baffle plate corresponding to the ceramic ball filler is fixed below the lower limit ring. The upper limit plate and the lower baffle plate are evenly distributed with flow holes.

Images