阅读说明：本技术 一种用于制备轻质白油的双层精馏塔 (Double-layer rectifying tower for preparing light white oil ) 是由 孟永飞 赵磊 胡波 于 2020-06-01 设计创作，主要内容包括：一种用于制备轻质白油的双层精馏塔,涉及一种精馏装置,在内塔(8)的上部罩有外塔(3),在内塔(8)的中心部位设有加热棒(20),在腔体A(19)内间隔设有外缘面和外塔(3)内壁固接的环形塔板A(11)、内缘面和内塔(8)外壁固接的环形塔板B(13),在腔体B(22)内间隔设有外缘面和内塔(8)内壁固接的环形塔板C(15)、内缘面和加热棒(20)外壁固接的环形塔板D(17)；本发明通过在制备轻质白油的精馏阶段增加利用热辐射原理将除杂后的加氢基础油先粗分为几个馏程混合油的双层精馏塔,实现了节省精馏塔数量、节能降耗的目的。(A double-layer rectifying tower for preparing light white oil relates to a rectifying device, an outer tower (3) is covered on the upper part of an inner tower (8), a heating rod (20) is arranged at the central part of the inner tower (8), annular tower plates A (11) fixedly connected with the outer edge surface and the inner wall of the outer tower (3) and annular tower plates B (13) fixedly connected with the inner edge surface and the outer wall of the inner tower (8) are arranged in a cavity A (19) at intervals, annular tower plates C (15) fixedly connected with the outer edge surface and the inner wall of the inner tower (8) and annular tower plates D (17) fixedly connected with the inner edge surface and the outer wall of the heating rod (20) are arranged in a cavity B (22) at intervals; the invention realizes the purposes of saving the number of the rectifying towers, saving energy and reducing consumption by adding the double-layer rectifying tower which roughly divides the hydrogenated base oil after impurity removal into a plurality of mixed oil with distillation ranges by utilizing the thermal radiation principle in the rectifying stage for preparing the light white oil.)

1. A double-layer rectifying tower for preparing light white oil is characterized in that: comprises an inner tower (8), a cavity B (22) is arranged in the inner tower (8), an outer tower (3) is covered on the upper part of the inner tower (8), a cavity A (19) is arranged between the outer tower (3) and the inner tower (8), the opposite two sides of the bottom of the outer tower (3) are respectively provided with a convex plate (5) which extends downwards and the bottom of which is connected with the inner tower (8), a connecting oil pipe (7) which runs through the cavity A (19) and the cavity B (22) is respectively arranged between the end part of the two convex plates (5) and the inner tower (8), annular tower plates A (11) of which the outer edge surfaces are fixedly connected with the inner wall of the outer tower (3) and annular tower plates B (13) of which the inner edge surfaces are fixedly connected with the outer wall of the inner tower (8) are arranged in the cavity A (19) at intervals, annular tower plates B (13) of which are fixedly connected with the outer edge surfaces and the outer wall of the inner tower (8) and annular tower plates B (13) and the inner wall of the outer tower (, annular column plate C (15) of outer fringe face and inner tower (8) inner wall rigid coupling is equipped with at the interval in cavity B (22), annular column plate D (17) of inner fringe face and heating rod (20) outer wall rigid coupling, at annular column plate C (15) and heating rod (20) outer wall, also be equipped with the gap between annular column plate D (17) and inner tower (8) inner wall respectively, the middle part of outer tower (3) is equipped with hydrogenation base oil and advances oil pipe (4), top at outer tower (3) is equipped with low boiling point and mixes hydrogenation base oil outlet pipe (1), top at inner tower (8) is equipped with and passes cavity A (19) and extends to outer tower (3) outside well low to well boiling point and mixes hydrogenation base oil outlet pipe (2), bottom at inner tower (8) is equipped with high boiling point and mixes hydrogenation base oil outlet pipe (9).

2. The double-layer rectifying tower for preparing light white oil as set forth in claim 1, wherein: the lower ends of the two convex plates (5) are respectively provided with a hemispherical head (6), and a connecting oil pipe (7) which runs through the cavity A (19) and the cavity B (22) is respectively arranged between the lower ends of the two hemispherical heads (6) and the inner tower (8).

3. The double-layer rectifying tower for preparing light white oil as set forth in claim 1, wherein: the inner edge surface of the annular tower plate A (11) is provided with a flange A (10) extending upwards, and the outer edge surface of the annular tower plate B (13) is provided with a flange B (12) extending upwards.

4. The double-layer rectifying tower for preparing light white oil as set forth in claim 1, wherein: the inner edge surface of the annular tower plate C (15) is provided with a flange C (14) extending upwards, and the outer edge surface of the annular tower plate D (17) is provided with a flange D (16) extending upwards.

5. The double-layer rectifying tower for preparing light white oil as set forth in claim 1, wherein: liquid leakage holes (18) are respectively arranged on the annular tower plate A (11), the annular tower plate B (13), the annular tower plate C (15) and the annular tower plate D (17).

6. The double-layer rectifying tower for preparing light white oil as set forth in claim 1, wherein: a cavity C (23) is arranged in the heating rod (20), and a spiral heating pipe (21) is arranged in the cavity C (23).

7. The double-layer rectifying tower for preparing light white oil as set forth in claim 6, wherein: supporting rods (24) are respectively arranged between the top end of the heating rod (20) and the top end of the cavity B (22) and between the bottom end of the heating rod (20) and the bottom end of the cavity B (22), and a through hole (25) penetrating through the outer part of the inner tower (8) and the cavity C (23) is arranged in one of the supporting rods (24) at the lower end of the inner tower (8).

8. The double-layer rectifying tower for preparing light white oil as set forth in claim 7, wherein: one end of a power wire (26) penetrates into the cavity C (23) from the outside of the through hole (25) and is connected with the spiral heating pipe (21).

Technical Field

The invention relates to a rectifying device, in particular to a double-layer rectifying tower for preparing light white oil.

Background

White oil, also known as white oil or liquid paraffin. A colorless, transparent, odorless, and non-glittering liquid oil. Generally, the lubricating oil is prepared by deep sulfuric acid refining and hydrogenation of lubricating oil fraction with viscosity (40 ℃). The method is widely applied to the fields of daily chemical industry, medicine production, food processing, fiber and textile, polystyrene resin, petrochemical industry, plastic and rubber processing, leather processing, instruments, electric power, agriculture and the like. The light white oil is prepared from petroleum distillate and synthetic oil distillate by hydrofining and precise fractionation, and is suitable for industries such as special equipment calibration, metal processing, daily chemicals and the like, wherein the food-grade white oil has the deepest refining degree and the strictest quality requirement. The existing method for preparing light white oil is generally a white oil production process by a hydrogenation method, and the white oil production process by the hydrogenation method has the advantages of no pollution, high yield, wide raw material source, various product types, high viscosity and the like, and is rapidly developed and widely applied. The device for preparing the light white oil generally needs to use a plurality of rectifying towers to accurately cut the hydrogenated base oil, but under the condition that the environmental protection requirement is higher and higher, the problem that how to effectively simplify the reaction process and achieve the requirement of energy conservation and consumption reduction is to be solved is solved.

Disclosure of Invention

In order to overcome the defects in the background art, the invention discloses a double-layer rectifying tower for preparing light white oil, which is characterized in that the double-layer rectifying tower is additionally arranged in the rectifying stage for preparing the light white oil, and the hydrogenated base oil after impurity removal is firstly roughly divided into mixed oil with a plurality of distillation ranges by utilizing the thermal radiation principle, so that the aims of saving the number of the rectifying towers, saving energy and reducing consumption are fulfilled.

In order to realize the purpose, the invention adopts the following technical scheme:

a double-layer rectifying tower for preparing light white oil is composed of an internal tower with a cavity B, an external tower on the top of internal tower, a cavity A between said internal and external towers, two convex plates extending downward and connected to internal tower, oil tubes between the ends of said convex plates and internal tower, annular tower plates A with external edge surface and internal wall, annular tower plates B with internal edge surface and external wall, and the heating rods between annular tower plates A, external wall and internal wall, heating rods in central position of internal tower, and annular tower plates C with external edge surface and internal wall, internal edge surface and external wall, and annular tower plates D with internal edge surface and external wall, Gaps are also respectively arranged between the annular tower plate D and the inner wall of the inner tower, the middle part of the outer tower is provided with a hydrogenated base oil inlet pipe, the top of the outer tower is provided with a low-boiling-point mixed hydrogenated base oil outlet pipe, the top of the inner tower is provided with a medium-low to medium-high-boiling-point mixed hydrogenated base oil outlet pipe which penetrates through the cavity A and extends to the outside of the outer tower, and the bottom of the inner tower is provided with a high-boiling-point mixed hydrogenated base oil outlet pipe.

The double-layer rectifying tower for preparing the light white oil is characterized in that the lower ends of the two protruding plates are respectively provided with a hemispherical head, and a connecting oil pipe penetrating through the cavity A and the cavity B is respectively arranged between the lower ends of the two hemispherical heads and the inner tower.

The double-layer rectifying tower for preparing the light white oil is characterized in that a flange A extending upwards is arranged on the inner edge surface of the annular tower plate A, and a flange B extending upwards is arranged on the outer edge surface of the annular tower plate B.

The double-layer rectifying tower for preparing the light white oil is characterized in that a flange C extending upwards is arranged on the inner edge surface of the annular tower plate C, and a flange D extending upwards is arranged on the outer edge surface of the annular tower plate D.

The double-layer rectifying tower for preparing the light white oil is characterized in that the annular tower plate A, the annular tower plate B, the annular tower plate C and the annular tower plate D are respectively provided with a liquid leakage hole.

The double-layer rectifying tower for preparing the light white oil is characterized in that a cavity C is arranged in the heating rod, and a spiral heating pipe is arranged in the cavity C.

The double-layer rectifying tower for preparing the light white oil is characterized in that supporting rods are respectively arranged between the top end of the heating rod and the top end of the cavity B and between the bottom end of the heating rod and the bottom end of the cavity B, and a through hole penetrating through the outer part of the inner tower and the cavity C is arranged in one of the supporting rods at the lower end of the inner tower.

One end of a power cord penetrates into the cavity C from the outside of the through hole and is connected with the spiral heating pipe.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

according to the double-layer rectifying tower for preparing the light white oil, the double-layer rectifying tower which roughly divides the hydrogenated base oil after impurity removal into a plurality of distillation range mixed oil by using the thermal radiation principle is additionally arranged in the rectifying stage for preparing the light white oil, so that the aims of saving the number of the rectifying towers, saving energy and reducing consumption are fulfilled; the invention has novel structure, obvious energy saving and consumption reduction and good use effect, fully utilizes the principle of heat radiation and is suitable for large-scale popularization.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of a ring tray A of the present invention;

FIG. 4 is a schematic structural view of a ring tray B of the present invention.

In the figure: 1. a low-distillation-point mixed hydrogenated base oil outlet pipe; 2. a mixed hydrogenated base oil outlet pipe with medium-low to medium-high boiling points; 3. an outer tower; 4. a hydrogenated base oil inlet pipe; 5. a protruding plate; 6. a hemispherical head; 7. connecting an oil pipe; 8. an inner tower; 9. a high-distillation-point mixed hydrogenated base oil outlet pipe; 10. flanging A; 11. an annular tower plate A; 12. flanging B; 13. an annular tower plate B; 14. flanging C; 15. an annular column plate C; 16. flanging D; 17. an annular column plate D; 18. a weep hole; 19. a cavity A; 20. a heating rod; 21. a spiral heating pipe; 22. a cavity B; 23. a cavity C; 24. a support bar; 25. perforating; 26. a power line.

Detailed Description

The present invention will be explained in more detail by the following examples, which are not intended to limit the present invention, and all changes and modifications within the scope of the present invention are intended to be protected by the disclosure of the present invention;

the double-layer rectifying tower for preparing the light white oil comprises an inner tower 8, a cavity B22 is arranged in the inner tower 8, an outer tower 3 is covered on the upper part of the inner tower 8, a cavity A19 is arranged between the outer tower 3 and the inner tower 8, two opposite sides of the bottom of the outer tower 3 are respectively provided with a convex plate 5 which extends downwards and is connected with the bottom of the inner tower 8, the lower ends of the two convex plates 5 are respectively provided with a hemispherical head 6, a connecting oil pipe 7 which penetrates through the cavity A19 and the cavity B22 is respectively arranged between the lower ends of the two hemispherical heads 6 and the inner tower 8, an annular tower plate A11 of which the outer edge surface is fixedly connected with the inner wall of the outer tower 3 and an annular tower plate B13 of which the inner edge surface is fixedly connected with the outer wall of the inner tower 8 are arranged in the cavity A19 at intervals, an upward extending flanging A10 is arranged on the inner edge surface of the annular tower plate A11, an upward extending flanging B12 is arranged on the outer edge surface of the annular tower plate B13 and an upward extending, Gaps are respectively arranged between the annular tower plate B13 and the inner wall of the outer tower 3, a heating rod 20 is arranged at the central part of the inner tower 8, a cavity C23 is arranged in the heating rod 20, a spiral heating pipe 21 is arranged in the cavity C23, annular tower plates C15 of which the outer edge surfaces are fixedly connected with the inner wall of the inner tower 8 and annular tower plates D17 of which the inner edge surfaces are fixedly connected with the outer wall of the heating rod 20 are arranged in the cavity B22 at intervals, upward extending flanges C14 are arranged on the inner edge surfaces of the annular tower plates C15, upward extending flanges D16 are arranged on the outer edge surfaces of the annular tower plates D17, gaps are also respectively arranged between the outer walls of the annular tower plates C15 and the heating rod 20 and between the annular tower plates D17 and the inner wall of the inner tower 8, liquid leakage holes 18 are respectively arranged on the annular tower plates A11, B13, C15 and D17, a hydrogenation base oil inlet pipe 4 is arranged in the middle part of the outer tower 3, and a low-fraction mixed base oil outlet pipe, the top of the inner tower 8 is provided with a medium-low to medium-high boiling point mixed hydrogenation base oil outlet pipe 2 which penetrates through the cavity A19 and extends to the outside of the outer tower 3, the bottom of the inner tower 8 is provided with a high boiling point mixed hydrogenation base oil outlet pipe 9, support rods 24 are respectively arranged between the top end of the heating rod 20 and the top end of the cavity B22 and between the bottom end of the heating rod 20 and the bottom end of the cavity B22, one support rod 24 at the lower end of the inner tower 8 is internally provided with a through hole 25 which penetrates through the outside of the inner tower 8 and the cavity C23, and one end of a power wire 26 penetrates through the cavity C23 from the outside of the through hole 25 and is connected with the.

When the double-layer rectifying tower for preparing the light white oil is used, a power line 26 is connected with a power supply, a spiral heating pipe 21 is started, the spiral heating pipe 21 heats a heating rod 20 to a required temperature, the hydrogenated base oil enters a cavity A19 from a hydrogenated base oil inlet pipe 4 arranged in the middle of an outer tower 3, the heating rod 20 heats a cavity B22 and transfers heat from the tower wall of an inner tower 8 to the cavity A19, the temperature in the cavity A19 is 1/4 to 1/2 of the temperature in the cavity B22, annular trays A11 and annular trays B13 arranged at intervals in the cavity A19 fractionate the hydrogenated base oil, the low-boiling point mixed hydrogenated base oil mixed in the hydrogenated base oil flows out from a low-boiling point mixed hydrogenated base oil outlet pipe 1 arranged at the top of the outer tower 3 after being gasified and is finely cut into a plurality of light white oils with different labels through the required rectifying tower, the rest hydrogenated base oil flows into a cavity B22 from a connecting oil pipe 7 arranged at the bottom of the cavity A19, the rest hydrogenated base oil is fractionated by annular trays C15 and annular trays D17 which are arranged at intervals in the cavity B22, the mixed hydrogenated base oil with the medium-low to medium-high boiling point in the hydrogenated base oil is gasified and then flows out from a mixed hydrogenated base oil outlet pipe 2 with the medium-low to medium-high boiling point arranged at the top of an inner tower 8 and is finely cut into a plurality of light white oils with different labels by a required rectifying tower under the action of high temperature in the cavity B22, the mixed hydrogenated base oil with the high boiling point is not gasified and flows out from a mixed hydrogenated base oil outlet pipe 9 with the high boiling point arranged at the bottom of the inner tower 8 and is finely cut into a plurality of light white oils with different labels by the required rectifying tower.

The present invention is not described in detail in the prior art.