Energy-saving solvent oil heavy component removal double-effect tower

Abstract

The utility model discloses an energy-saving solvent oil heavy component removal double-effect tower which comprises an atmospheric tower and a pressurizing tower, the upper end of the atmospheric tower is fixedly connected with an oil inlet pipe, the lower end of the atmospheric tower is provided with a first reboiling assembly, the bottom end of the atmospheric tower is fixedly connected with a discharge pipe, the discharge pipe is fixedly connected to the upper end of the pressurizing tower, and the upper end of the atmospheric tower is provided with a first condensation assembly. An oil-water separator is arranged below the first condensation assembly, the bottom end of the oil-water separator is fixedly connected with a return pipe, the return pipe is fixedly connected to the upper end of the atmospheric tower, the lower end of the pressurizing tower is provided with a second reboiling assembly, the bottom end of the pressurizing tower is provided with a second condensation assembly, the top end of the pressurizing tower is fixedly connected with a heat transfer pipe, and the heat transfer pipe is connected with the first reboiling assembly. The device has the advantages that a traditional single-tower process is divided into two towers, a single tower is changed into two towers, one tower is an atmospheric tower, and the other tower is a pressurized tower, so that a gas-phase material of the pressurized tower is used as a heat source of the first tower to heat the first tower, the utilization rate of steam is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of deweighting towers, in particular to an energy-saving solvent oil deweighting double-effect tower. Background Art

[0002] The deweighting tower is a common industrial equipment, which is mainly used to remove impurities in gas or liquid to reduce its density, so as to achieve the purpose of separation and purification. Its principle is based on the combination of gravity separation and resistance separation. Publication No.: CN201626925U proposes a debenzene tower device that can directly and continuously remove heavy benzene and naphthalene oil. It is based on the traditional bubble-cap debenzene tower, and two broken tower plates are added at the bottom of the heavy benzene removal section and the naphthalene oil removal section, respectively, to introduce the liquid in the tower into two benzene, heavy benzene separators and benzene, naphthalene oil separators. After clarification and separation in the two separators, the benzene with lower density returns to the lower tower plate, and the heavy benzene and naphthalene oil with higher density are extracted from the lower part of the two separators through two "∪-shaped" water seals, and the water is discharged from the bottom through two "∪-shaped" water seals. The ability to continuously remove heavy benzene and naphthalene oil from the tower is an innovation in debenzene processing equipment. This technology can be used to transform the debenzene tower currently in use. By adding two manholes, two tower break plates, two separators and four "∪-shaped" water seals to the debenzene tower, the debenzene tower currently in use can be transformed into a debenzene tower device that can directly and continuously remove heavy benzene and naphthalene oil.

[0003] However, there are some problems with the existing technology: the existing solvent oil deweighting tower adopts a single-tower process, and the heat at the top of the tower is cooled by air cooling plus circulating water cooling, which results in high steam consumption, and large amounts of electricity and circulating water. Therefore, we propose an energy-saving solvent oil deweighting double-effect tower. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide an energy-saving solvent oil deweighting double-effect tower, by dividing the traditional single-tower process into two, the single tower is changed into a double tower, one tower is a normal pressure tower, and the second tower is a pressurized tower, so that the gas phase material of the pressurized tower is used as the heat source of the first tower to heat the first tower, thereby improving the utilization rate of steam.

[0005] The utility model is implemented as follows: an energy-saving solvent oil deweighting double-effect tower comprises an atmospheric pressure tower and a pressurized tower, wherein an oil inlet pipe is fixedly connected to the upper end of the atmospheric pressure tower, a first reboiling assembly is arranged at the lower end of the atmospheric pressure tower, a discharge pipe is fixedly connected to the bottom end of the atmospheric pressure tower, the discharge pipe is fixedly connected to the upper end of the pressurized tower, a first condensation assembly is arranged at the upper end of the atmospheric pressure tower, an oil-water separation assembly is arranged below the first condensation assembly, a second reboiling assembly is arranged at the lower end of the pressurized tower, a second condensation assembly is arranged at the bottom end of the pressurized tower, a heat transfer pipe is fixedly connected to the top end of the pressurized tower, and the heat transfer pipe is connected to the first reboiling assembly.

[0006] Optionally, the first reboiler assembly includes a first exhaust pipe, the first exhaust pipe is fixedly connected to the first reboiler, the heat transfer pipe is fixedly connected to the upper end of the first reboiler, the lower end of the first reboiler is fixedly connected to a condensate discharge pipe, the condensate discharge pipe is fixedly connected to the upper end of the pressurized tower, the bottom end of the first reboiler is connected to a first liquid discharge pipe, and the first liquid discharge pipe is fixedly connected to the bottom end of the atmospheric pressure tower.

[0007] Optionally, the first condensation component includes a first steam pipe, the first steam pipe is fixedly connected to the first condenser, the upper end of the first condenser is fixedly connected to the first circulating water return pipe, the lower end of the first condenser is fixedly connected to the first circulating water upper pipe, and the middle part of the lower end of the first condenser is fixedly connected to the drain pipe.

[0008] Optionally, the oil-water separation assembly includes an oil-water separator, which is fixedly connected to a drain pipe, a return pipe is fixedly connected to the bottom of the oil-water separator, the return pipe is fixedly connected to the upper end of the atmospheric pressure tower, and an oil outlet pipe is fixedly connected to one side of the oil-water separator.

[0009] Optionally, the second reboiler assembly includes a second exhaust pipe, the second exhaust pipe is fixedly connected to a second reboiler, the upper end of the second reboiler is fixedly connected to a steam main pipe, the lower end of the second reboiler is fixedly connected to a steam condensate outlet pipe, the bottom end of the second reboiler is connected to a second drain pipe, and the second drain pipe is fixedly connected to the bottom end of the pressurized tower.

[0010] Optionally, the second condensing component includes a second steam pipe, the second steam pipe is fixedly connected to a second condenser, the upper end of the second condenser is fixedly connected to a second circulating water return pipe, the lower end of the second condenser is fixedly connected to a second circulating water upper pipe, and a weight drain pipe is arranged in the middle of the lower end of the second condenser.

[0011] Optionally, a filter is provided on the condensed water discharge pipe, and the filter is used to filter the condensed water.

[0012] Optionally, valves are provided on the oil inlet pipe, the heat transfer pipe, the first exhaust pipe, the condensate discharge pipe, the first steam pipe, the drain pipe, the second exhaust pipe, the steam main pipe, the steam condensate outlet pipe, the second steam pipe and the weight discharge pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model divides the traditional single-tower process into two, and the single tower becomes a double tower, one tower is a normal pressure tower, and the other tower is a pressure tower. The gas phase material of the pressure tower is used as the heat source of the first tower to heat the first tower, thereby improving the utilization rate of steam.

[0015] 2. The utility model is provided with a condensation reflux device to condense the steam and recycle it for reuse, thus saving water resources.

[0016] 3. The utility model adopts circulating water for condensation on the condenser, which saves water resources and reduces costs.

[0017] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram provided by the utility model;

[0019] Figure 2 It is a schematic diagram of the atmospheric pressure tower provided by the utility model;

[0020] Figure 3 It is a schematic diagram of a pressurized tower provided by the utility model.

[0021] In the figure: 1, atmospheric tower; 2, oil inlet pipe; 3, first reboiler assembly; 301, first exhaust pipe; 302, first reboiler; 303, condensate discharge pipe; 304, first liquid discharge pipe; 4, discharge pipe; 5, pressurized tower; 6, first condensation assembly; 601, first steam pipe; 602, first condenser; 603, first circulating water return pipe; 604, first circulating water supply pipe; 605, drain pipe; 7, oil-water separation assembly; 701, oil-water Separator; 702, reflux pipe; 8, filter; 9, second reboiler assembly; 901, second exhaust pipe; 902, second reboiler; 903, steam main pipe; 904, steam condensate outlet pipe; 905, second drain pipe; 10, second condensation assembly; 101, second steam pipe; 102, second condenser; 103, second circulating water return pipe; 104, second circulating water upper pipe; 105, weight drain pipe; 11, heat transfer pipe; 12, oil outlet pipe. DETAILED DESCRIPTION

[0022] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0023] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0024] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0025] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0026] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0027] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 3 As shown, an energy-saving solvent oil deweighting double-effect tower provided by an embodiment of the utility model includes a normal pressure tower 1 and a pressurized tower 5. The normal pressure tower 1 is a cylindrical round tower, and is filled with fillers. After the crude solvent oil is added into the normal pressure tower 1 through the oil inlet pipe 2, it will pass through the fillers, and the heavy objects will flow downward through the gaps in the fillers. The essential oil is adsorbed in the fillers. With the inflow of hot steam, the essential oil will be mixed with the hot steam and discharged from the first steam pipe 601.

[0029] The pressure tower 5 is also a cylindrical round tower. The waste flowing out of the atmospheric tower 1 will flow into the pressure tower 5 through the discharge pipe 4, and the pressure tower 5 will be filtered after being processed.

[0030] An oil inlet pipe 2 is fixedly connected to the upper end of the atmospheric tower 1. The oil inlet pipe 2 is a feed inlet. The crude solvent oil that needs to be deweighted enters the atmospheric tower 1 through the oil inlet pipe 2 for deweighting.

[0031] A first reboiler assembly 3 is provided at the lower end of the atmospheric tower 1, and the first reboiler assembly 3 includes a first exhaust pipe 301, the first exhaust pipe 301 is fixedly connected to the first reboiler 302, the heat transfer pipe 11 is fixedly connected to the upper end of the first reboiler 302, the lower end of the first reboiler 302 is fixedly connected to a condensate discharge pipe 303, and the condensate discharge pipe 303 is fixedly connected to the upper end of the pressurized tower 5. The liquid flowing out of the atmospheric tower 1 flows into the first reboiler 302 through the first drain pipe 304. The first reboiler 302 heats the inflowing liquid to vaporize it, and the vaporized liquid is re-added to the atmospheric tower 1 through the first exhaust pipe 301. The condensate generated by the first reboiler 302 flows into the pressurized tower 5 through the condensate discharge pipe 303.

[0032] The condensate discharge pipe 303 is provided with a filter 8, which performs preliminary filtering on the condensate flowing through to remove impurities therein.

[0033] A discharge pipe 4 is fixedly connected to the bottom end of the atmospheric tower 1, and the discharge pipe 4 is fixedly connected to the upper end of the pressurized tower 5. A first condensation component 6 is arranged at the upper end of the atmospheric tower 1, and the first condensation component 6 includes a first steam pipe 601, and the first steam pipe 601 is fixedly connected to the first condenser 602. The upper end of the first condenser 602 is fixedly connected to the first circulating water return pipe 603, and the lower end of the first condenser 602 is fixedly connected to the first circulating water upper water pipe 604. A drain pipe 605 is fixedly connected to the middle part of the lower end of the first condenser 602. The refined solvent oil absorbed by the hot steam flows out of the first steam pipe 601 along with the hot steam, and then flows into the first condenser 602. At this time, the water in the first circulating water upper water pipe 604 and the first circulating water return pipe 603 circulates to condense and liquefy the hot steam, and the liquefied liquid flows out through the drain pipe 605.

[0034] An oil-water separation component 7 is arranged below the first condensation component 6, and the oil-water separation component 7 includes an oil-water separator 701, and the oil-water separator 701 is fixedly connected to the drain pipe 605. The bottom of the oil-water separator 701 is fixedly connected to a reflux pipe 702, and the reflux pipe 702 is fixedly connected to the upper end of the atmospheric pressure tower 1. One side of the oil-water separator 701 is fixedly connected to an oil outlet pipe 12. The liquid flowing out of the drain pipe 605 flows into the oil-water separator 701, and the oil-water separator 701 separates the refined solvent oil therein and flows out from the oil outlet pipe 12. The separated water is re-added to the atmospheric pressure tower 1 for use through the reflux pipe 702.

[0035] A second reboiler assembly 9 is provided at the lower end of the pressurizing tower 5, and the second reboiler assembly 9 includes a second exhaust pipe 901, to which a second reboiler 902 is fixedly connected, a steam main pipe 903 is fixedly connected to the upper end of the second reboiler 902, a steam condensate outlet pipe 904 is fixedly connected to the lower end of the second reboiler 902, a second drain pipe 905 is connected to the bottom end of the second reboiler 902, and the second drain pipe 905 is fixedly connected to the bottom end of the pressurizing tower 5. The liquid flowing out of the pressurizing tower 5 flows into the second reboiler 902 through the second drain pipe 905. The second reboiler 902 is heated by the hot steam in the steam main pipe 903, so that the liquid is vaporized and flows back into the pressurizing tower 5 through the second exhaust pipe 901, and the condensed water generated in the process is discharged through the steam condensate outlet pipe 904.

[0036] A second condensing component 10 is provided at the bottom end of the pressure tower 5, and the second condensing component 10 includes a second steam pipe 101. The second steam pipe 101 is fixedly connected to a second condenser 102. The upper end of the second condenser 102 is fixedly connected to a second circulating water return pipe 103, and the lower end of the second condenser 102 is fixedly connected to a second circulating water supply pipe 104. A weight removal pipe 105 is provided in the middle of the lower end of the second condenser 102. The hot liquid flowing out of the pressure tower 5 through the second steam pipe 101 flows into the second condenser 102. The second condenser 102 cools it through the second circulating water supply pipe 104 and the second circulating water return pipe 103, and then discharges it through the weight removal pipe 105.

[0037] A heat transfer pipe 11 is fixedly connected to the top of the pressurizing tower 5 , and the heat transfer pipe 11 is connected to the first reboiler assembly 3 . The hot gas generated in the pressurizing tower 5 is transferred to the first reboiler 302 through the heat transfer pipe 11 to provide heat to the first reboiler 302 .

[0038] Valves are provided on the oil inlet pipe 2, the heat transfer pipe 11, the first exhaust pipe 301, the condensate discharge pipe 303, the first steam pipe 601, the drain pipe 605, the second exhaust pipe 901, the steam main pipe 903, the steam condensate outlet pipe 904, the second steam pipe 101 and the weight discharge pipe 105, and the valves are used to control the flow of gas or liquid in each pipe.

[0039] The working principle of the utility model is as follows:

[0040] After the crude solvent oil flows into the atmospheric tower 1 for deweighting, the refined solvent oil flows into the first condenser 602 through hot steam, and after condensation, it becomes liquid and flows into the oil-water separator 701. The oil-water separator 701 separates the refined solvent oil, and the remaining water is re-added to the atmospheric tower 1. The liquid in the atmospheric tower 1 will flow into the first reboiler 302, which heats it to vaporize it and re-add it to the atmospheric tower 1 to provide hot steam for it, and the extracted heavy objects will flow into the pressurizing tower 5, and after being processed by the pressurizing tower 5, they will flow into the second condenser 102, and the second condenser 102 will cool it and then discharge it, and the water in the pressurizing tower 5 will flow into the second reboiler 902, and it will be heated by the hot steam in the steam main 903, so that the liquid is vaporized and re-added to the pressurizing tower 5, and the hot air generated in the pressurizing tower 5 will flow to the first reboiler 302 to provide heat for it.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving solvent oil deweighting double-effect tower, comprising an atmospheric pressure tower (1) and a pressure tower (5), characterized in that: The upper end of the atmospheric tower (1) is fixedly connected to an oil inlet pipe (2), the lower end of the atmospheric tower (1) is provided with a first reboiling assembly (3), the bottom end of the atmospheric tower (1) is fixedly connected to a discharge pipe (4), the discharge pipe (4) is fixedly connected to the upper end of the pressurized tower (5), the upper end of the atmospheric tower (1) is provided with a first condensation assembly (6), an oil-water separation assembly (7) is provided below the first condensation assembly (6), the lower end of the pressurized tower (5) is provided with a second reboiling assembly (9), the bottom end of the pressurized tower (5) is provided with a second condensation assembly (10), the top end of the pressurized tower (5) is fixedly connected to a heat transfer pipe (11), and the heat transfer pipe (11) is connected to the first reboiling assembly (3).

2. The energy-saving solvent oil deweighting double-effect tower according to claim 1, characterized in that: The first reboiler assembly (3) comprises a first exhaust pipe (301), the first exhaust pipe (301) is fixedly connected to a first reboiler (302), the heat transfer pipe (11) is fixedly connected to the upper end of the first reboiler (302), the lower end of the first reboiler (302) is fixedly connected to a condensate discharge pipe (303), the condensate discharge pipe (303) is fixedly connected to the upper end of a pressurized tower (5), the bottom end of the first reboiler (302) is connected to a first liquid discharge pipe (304), and the first liquid discharge pipe (304) is fixedly connected to the bottom end of an atmospheric tower (1).

3. The energy-saving solvent oil deweighting double-effect tower according to claim 1 is characterized in that: The first condensation component (6) includes a first steam pipe (601), the first steam pipe (601) is fixedly connected to a first condenser (602), the upper end of the first condenser (602) is fixedly connected to a first circulating water return pipe (603), the lower end of the first condenser (602) is fixedly connected to a first circulating water supply pipe (604), and the middle part of the lower end of the first condenser (602) is fixedly connected to a drain pipe (605).

4. The energy-saving solvent oil deweighting double-effect tower according to claim 3 is characterized in that: The oil-water separation component (7) comprises an oil-water separator (701), the oil-water separator (701) is fixedly connected to a drain pipe (605), a return pipe (702) is fixedly connected to the bottom end of the oil-water separator (701), the return pipe (702) is fixedly connected to the upper end of the atmospheric tower (1), and an oil outlet pipe (12) is fixedly connected to one side of the oil-water separator (701).

5. The energy-saving solvent oil deweighting double-effect tower according to claim 1 is characterized in that: The second reboiler assembly (9) comprises a second exhaust pipe (901), the second exhaust pipe (901) is fixedly connected to a second reboiler (902), the upper end of the second reboiler (902) is fixedly connected to a steam main pipe (903), the lower end of the second reboiler (902) is fixedly connected to a steam condensate outlet pipe (904), the bottom end of the second reboiler (902) is connected to a second liquid discharge pipe (905), and the second liquid discharge pipe (905) is fixedly connected to the bottom end of the pressurized tower (5).

6. The energy-saving solvent oil deweighting double-effect tower according to claim 1, characterized in that: The second condensing component (10) includes a second steam pipe (101), the second steam pipe (101) is fixedly connected to a second condenser (102), the upper end of the second condenser (102) is fixedly connected to a second circulating water return pipe (103), the lower end of the second condenser (102) is fixedly connected to a second circulating water supply pipe (104), and a weight removal pipe (105) is provided in the middle of the lower end of the second condenser (102).

7. The energy-saving solvent oil deweighting double-effect tower according to claim 2 is characterized in that: The condensed water discharge pipe (303) is provided with a filter (8), and the filter (8) is used to filter the condensed water.

8. An energy-saving solvent oil deweighting double-effect tower according to claim 1 or 2 or 3 or 5 or 6, characterized in that: Valves are provided on the oil inlet pipe (2), the heat transfer pipe (11), the first exhaust pipe (301), the condensate discharge pipe (303), the first steam pipe (601), the drain pipe (605), the second exhaust pipe (901), the steam main pipe (903), the steam condensate outlet pipe (904), the second steam pipe (101) and the weight discharge pipe (105).

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