Device for improving flash point of oil product by combination of equipment of climbing membrane evaporation and fractionation
Patent Information
- Application Number
- CN202522684929.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-18
AI Technical Summary
[0003]而国内目前大部分导热油的开口闪点在180～220℃之间，而广大用户则要求闪点在240℃以上，从而产生了供需矛盾
本实用新型将预热后的油品泵入升膜沸腾器的底部，用导热油或过热蒸汽将升膜管内的油品加热至300℃，同时导入0.1MPa的氮气作为沸腾气源，整个工艺系统采用抽真空（真空度为5KPa）系统，升膜沸腾器上部为两端填料作为分馏柱，并以回流作为提纯的手段，经过反复试验，取得了十分理想的效果，不仅闪点超过了240℃，而且初馏点也相应得到了提高，设计合理，实用性强，可快速有效提高开口闪点和初馏点，达到了预期目标，可为客户提供高闪点、高初馏点的产品。
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Figure CN224901217U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of oil flash point enhancement devices, specifically a device for enhancing the flash point of oil using a combination of rising film evaporation and fractionation equipment. Background Technology
[0002] The flash point of heat transfer oil is not a fixed value; it is affected by the specific type and formulation of the heat transfer oil. However, in general, the flash point of common heat transfer oils is usually between 200℃ and 300℃. With the advancement of domestic technology and for the sake of production safety, enterprises have put forward strict requirements on the flash point of heat transfer oil products.
[0003] Currently, most heat transfer oils in China have an open flash point between 180 and 220°C, while users require a flash point above 240°C, thus creating a supply-demand imbalance. Utility Model Content
[0004] The purpose of this invention is to provide a device for improving the flash point of oil products by combining rising film evaporation and fractionation, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for improving the flash point of oil products using a combination of rising film evaporation and fractionation equipment, comprising: a shell and fractionation columns, a bottom shell being sealed to the lower end of the shell via a flange, two fractionation columns being fixedly installed at the upper end, a feed pipe being fixedly installed at the lower end of the bottom shell, a plurality of rising film tubes being installed inside the shell via fixed components, and a distribution plate being provided at the bottom end of the shell; An inlet pipe is fixedly installed on the upper side of one end of the shell, and an outlet pipe is fixedly installed on the lower side of the other end; The upper ends of the two fractionation columns are respectively fixedly installed with a return oil pipe and a sucker oil pipe, and an oil outlet pipe is fixedly installed at one end of the return oil pipe.
[0006] Preferably, the fixing component includes a fixing plate one and a fixing plate two. The fixing plate one is fixed to the upper inner wall of the shell, and the fixing plate two is fixed to the lower inner wall of the shell by bolts. Both the fixing plate one and the fixing plate two have a number of insertion holes corresponding to the rising film tube on their side walls.
[0007] Preferably, retaining rings are fixedly installed on the outer walls of both the upper and lower ends of the rising film tube. The upper end of the rising film tube is inserted into the insertion hole of the first fixing plate, and the lower end passes through the insertion hole on the second fixing plate. The two retaining rings abut against the inner side walls of the first fixing plate and the second fixing plate, respectively.
[0008] Preferably, the outer end of the rising film tube is fitted with a heat-conducting fin and fixed between two retaining rings by bolts.
[0009] Preferably, an ammonia inlet pipe is fixedly installed on the lower outer wall of the shell, the inner end of the ammonia inlet pipe is inserted into the shell and fixedly connected to one end of the distribution coil, and a plurality of gas outlet holes are evenly opened on the upper end of the distribution coil.
[0010] Preferably, a sealing plate is fixedly installed on the upper inner wall of the bottom shell, and a plurality of sealing holes corresponding to the rising film tube are evenly opened on the sealing plate. A sealing ring is fixedly installed on the inner end of the sealing hole, and the cross-section of the sealing hole and the sealing ring are both convex.
[0011] Preferably, when the bottom shell is fixed at the lower end of the housing, the lower end of the rising film tube is inserted into the sealing hole by squeezing the sealing ring and closely abutting against the inner wall of the bottom end of the sealing ring.
[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention pumps preheated oil into the bottom of a rising film boiler, using heat transfer oil or superheated steam to heat the oil in the rising film tube to 300°C. Simultaneously, 0.1 MPa nitrogen is introduced as the boiling gas source. The entire process system employs a vacuum system (5 kPa). The upper part of the rising film boiler uses two-end packing as a fractionating column, and reflux is used as a purification method. After repeated experiments, very ideal results have been achieved. Not only has the flash point exceeded 240°C, but the initial boiling point has also been correspondingly improved. The design is reasonable and highly practical, quickly and effectively increasing the open flash point and initial boiling point, achieving the expected goals and providing customers with products with high flash points and high initial boiling points. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the open bottom shell structure of this utility model; Figure 3 This is a schematic diagram of the unfolded shell and rising film tube of this utility model; Figure 4 This is a schematic diagram showing the connection between the heat-conducting fins and the rising film tube of this utility model; Figure 5 This is a top view of the bottom shell structure of this utility model; Figure 6 This is a flowchart illustrating the process of this utility model.
[0014] In the diagram: 1. Shell; 2. Fixing plate one; 3. Fixing plate two; 4. Rising film tube; 5. Baffle ring; 6. Heat-conducting fin; 7. Inlet pipe; 8. Outlet pipe; 9. Ammonia inlet pipe; 10. Dividing coil; 11. Bottom shell; 12. Feed pipe; 13. Sealing plate; 14. Sealing hole; 15. Sealing ring; 16. Fractionating column; 17. Ammonia outlet pipe; 18. Oil return pipe; 19. Oil extraction pipe; 20. Oil outlet pipe. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.
[0016] Please see Figures 1 to 6 This utility model provides a technical solution: a device for improving the flash point of oil products using a combination of rising film evaporation and fractionation, comprising: a shell 1 and fractionation columns 16. The lower end of the shell 1 is sealed to a bottom shell 11 via a flange, and two fractionation columns 16 are fixedly installed at the upper end. An ammonia outlet pipe 17 is fixedly installed at the end of the fractionation column 16 away from the shell 1. The ammonia outlet pipe 17 is connected to the inner end of the fractionation column 16 and is connected to an external vacuum system for ammonia recovery. A feed pipe 12 is fixedly installed at the lower end of the bottom shell 11. Several rising film tubes 4 are installed inside the shell 1 via fixed components. A distribution coil 10 is provided at the bottom end of the shell 1. The heat transfer oil for which the flash point needs to be improved is fed into the bottom shell 11 through the feed pipe 12 and then enters the rising film tubes 4 inside the shell 1 to improve the flash point.
[0017] An inlet pipe 7 is fixedly installed on the upper side of one end of the shell 1, and an outlet pipe 8 is fixedly installed on the lower side of the other end. The inner ends of both the inlet pipe 7 and the outlet pipe 8 are connected to the interior of the shell 1. An ammonia inlet pipe 9 is fixedly installed on the lower outer wall of the shell 1. The inner end of the ammonia inlet pipe 9 is inserted into the shell 1 and fixedly connected to one end of the distribution coil 10. Several air outlet holes are evenly opened at the upper end of the distribution coil 10. Ammonia is introduced into the ammonia inlet pipe 9. The ammonia enters the distribution coil 10 and is discharged through the air outlet holes. The inlet pipe 7 is connected to heat transfer oil or superheated steam at a temperature of 320 degrees Celsius. The heat transfer oil or superheated steam flows through the shell 1 and is discharged through the outlet pipe 8, heating the oil in the rising film tube 4 to 300 degrees Celsius. At the same time, 0.1 MPa of nitrogen is introduced into the ammonia inlet pipe 9 as a boiling gas source.
[0018] The fixing components include a first fixing plate 2 and a second fixing plate 3. The first fixing plate 2 is fixed to the upper inner wall of the housing 1, and the second fixing plate 3 is fixed to the lower inner wall of the housing 1 by bolts. The side walls of the first fixing plate 2 and the second fixing plate 3 are provided with several insertion holes corresponding to the rising film tube 4. The outer walls of the upper and lower ends of the rising film tube 4 are fixedly installed with retaining rings 5. The upper end of the rising film tube 4 is inserted into the insertion hole of the first fixing plate 2, and the lower end passes through the insertion hole on the second fixing plate 3. The two retaining rings 5 abut against the inner side walls of the first fixing plate 2 and the second fixing plate 3, respectively. First, the upper end of the rising film tube 4 is inserted into the first fixing plate 2. Then, the second fixing plate 3 is fitted onto the lower end of the rising film tube 4. Next, the second fixing plate 3 is pushed into the housing 1, so that the two retaining rings 5 abut against the inner side walls of the first fixing plate 2 and the second fixing plate 3, respectively. The second fixing plate 3 is then fixed with bolts to facilitate the disassembly and assembly of the rising film tube 4.
[0019] A sealing plate 13 is fixedly installed on the upper inner wall of the bottom shell 11. Several sealing holes 14 corresponding to the rising film tube 4 are evenly opened on the sealing plate 13. A sealing ring 15 is fixedly installed on the inner end of the sealing hole 14. The cross-section of the sealing hole 14 and the sealing ring 15 are both convex. When the bottom shell 11 is fixed at the lower end of the shell 1, the lower end of the rising film tube 4 is inserted into the sealing hole 14 by squeezing the sealing ring 15 and closely abutting against the inner wall of the bottom end of the sealing ring 15, thus fixing the bottom shell 11 at the lower end of the shell 1. At the same time, the rising film tube 4 and the sealing plate 13 inside the bottom shell 11 are sealed together. The oil enters the bottom shell 11 through the feed pipe 12 and then enters the rising film tube 4.
[0020] The outer end of the rising film tube 4 is fitted with heat-conducting fins 6 and fixed between two retaining rings 5 by bolts. The heat-conducting fins 6 increase the contact area between the heat transfer oil or superheated steam and the rising film tube 4, which can quickly heat up the oil in the rising film tube 4.
[0021] The upper ends of the two fractionating columns 16 are respectively fixedly installed with a return oil pipe 18 and a sucker oil pipe 19. One end of the return oil pipe 18 is fixedly installed with an oil outlet pipe 20. The upper part of the shell 1 is filled with packing at both ends to serve as the fractionating columns 16, and reflux is used as a purification method. An oil pump is installed between the return oil pipe 18 and the sucker oil pipe 19. The oil inlet end of the oil pump is connected to the sucker oil pipe 19, and the oil outlet end of the oil pump is connected to the return oil pipe 18 to purify the oil. The purified oil is discharged through the oil outlet pipe 20.
[0022] Experimental data:
[0023] When this device is in operation, the preheated oil is pumped into the bottom of the rising film boiling tank. The oil in the rising film boiling tank is heated to 300°C using heat transfer oil or superheated steam. At the same time, nitrogen gas at 0.1 MPa is introduced as the boiling gas source. The entire process system adopts a vacuum system (vacuum degree of 5 kPa). The upper part of the rising film boiling tank is filled with packing at both ends as a fractionating column, and reflux is used as a purification method. After repeated experiments, very ideal results have been achieved. Not only has the flash point exceeded 240°C, but the initial boiling point has also been correspondingly improved.
[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
Claims
1. A device for improving the flash point of oil products using a combination of rising film evaporation and fractionation, comprising: The shell (1) and the fractionating column (16) are characterized in that: a feed pipe (12) is fixedly installed at the lower end of the shell (1) through a flange, a number of rising film pipes (4) are installed inside the shell (1) through a fixing component, and a dividing plate pipe (10) is provided at the bottom end of the shell (1). An inlet pipe (7) is fixedly installed on the upper side of one end of the shell (1), and an outlet pipe (8) is fixedly installed on the lower side of the other end. The upper ends of the two fractionation columns (16) are respectively fixedly installed with a return oil pipe (18) and a sucker oil pipe (19), and an oil outlet pipe (20) is fixedly installed at one end of the return oil pipe (18).
2. The device for improving the flash point of oil products using a combined rising film evaporation and fractionation system according to claim 1, characterized in that: The fixing components include a fixing plate one (2) and a fixing plate two (3). The fixing plate one (2) is fixed to the upper inner wall of the shell (1), and the fixing plate two (3) is fixed to the lower inner wall of the shell (1) by bolts. Several insertion holes corresponding to the rising film tube (4) are opened on the side walls of the fixing plate one (2) and the fixing plate two (3).
3. The device for improving the flash point of oil products using a combined rising film evaporation and fractionation system according to claim 2, characterized in that: The outer walls of the upper and lower ends of the rising membrane tube (4) are fixedly installed with retaining rings (5). The upper end of the rising membrane tube (4) is inserted into the insertion hole of the first fixing plate (2), and the lower end passes through the insertion hole on the second fixing plate (3). The two retaining rings (5) respectively abut against the inner side walls of the first fixing plate (2) and the second fixing plate (3).
4. The device for improving the flash point of oil products using a combined rising film evaporation and fractionation system according to claim 1, characterized in that: The outer end of the rising film tube (4) is fitted with a heat-conducting fin (6) and fixed between two retaining rings (5) by bolts.
5. The device for improving the flash point of oil products using a combined rising film evaporation and fractionation system according to claim 1, characterized in that: An ammonia inlet pipe (9) is fixedly installed on the lower outer wall of the shell (1). The inner end of the ammonia inlet pipe (9) is inserted into the shell (1) and fixedly connected to one end of the distribution pipe (10). Several gas outlet holes are evenly opened on the upper end of the distribution pipe (10).
6. The device for improving the flash point of oil products using a combined rising film evaporation and fractionation system according to claim 1, characterized in that: A sealing plate (13) is fixedly installed on the upper inner wall of the bottom shell (11). Several sealing holes (14) corresponding to the rising film tube (4) are evenly opened on the sealing plate (13). A sealing ring (15) is fixedly installed on the inner end of the sealing hole (14). The cross-sections of the sealing hole (14) and the sealing ring (15) are both convex.
7. The device for improving the flash point of oil products using a combined rising film evaporation and fractionation system according to claim 1, characterized in that: When the bottom shell (11) is fixed at the lower end of the shell (1), the lower end of the rising film tube (4) is inserted into the sealing hole (14) by squeezing the sealing ring (15) and closely abutting against the inner wall of the bottom end of the sealing ring (15).