Decrystallized anthracene oil production system

Abstract

The utility model belongs to the technical field of deep processing of coal tar, and particularly relates to a decrystallized anthracene oil production system which comprises a main decrystallized anthracene oil tank, and a main feeding pipe, a main discharging pipe and a main discharging pump which are arranged on the main decrystallized anthracene oil tank, the auxiliary feeding pipe, the auxiliary discharging pipe and the auxiliary discharging pump are arranged on the auxiliary anthracene removal tank; and the mixing tank is connected with outlets of the main feeding pipe and the auxiliary discharging pipe. Cooling, crystallizing and centrifugally separating anthracene oil extracted from the bottom of the tar rectifying tower to obtain decrystallized anthracene oil and crude anthracene; and removing anthracene, phenanthrene, carbazole and the like in the crude anthracene through subsequent refining to obtain heteroanthracene-removed oil. Generally, the viscosity of impurity-removed anthracene oil is large, the viscosity of de-crystallized anthracene oil is small, the impurity-removed anthracene oil and the de-crystallized anthracene oil are conveyed into a mixing tank through a main discharging pipe and an auxiliary discharging pipe respectively and mixed in the mixing tank, and the feeding amount of the impurity-removed anthracene oil and the feeding amount of the de-crystallized anthracene oil are adjusted by adjusting the flow of a main discharging pump and the flow of an auxiliary discharging pump, so that the viscosity of mixed liquid (mixed anthracene oil) in the mixing tank is adjusted; therefore, the viscosity requirements for different purposes can be met.

Description

Technical Field

[0001] This utility model belongs to the field of coal tar deep processing technology, specifically relating to a decrystalline anthracene oil production system. Background Technology

[0002] The production process of decrystalline anthracene oil mainly involves extracting anthracene oil from tar, then removing crude anthracene through steps such as cooling crystallization and filtration, ultimately obtaining decrystalline anthracene oil. The detailed production process principle is as follows:

[0003] Raw material preparation: Anthracene oil is extracted from the tar distillation system. Anthracene oil is taken from the bottom of the tar distillation tower and is the raw material for processing and producing anthracene, phenanthrene, and carbazole. Cooling and crystallization: Anthracene oil is pumped to a crystallizer through anthracene oil feedstock and undergoes cooling and crystallization in the crystallizer. During the cooling and crystallization process, the crude anthracene in the anthracene oil will form crystals.

[0004] Centrifugal Separation: The cooled and crystallized slurry flows by gravity to a centrifuge, where crude anthracene is separated from the liquid. The crude anthracene is then packaged by packaging workers and used as raw material for the production of anthracene, phenanthrene, and carbazole. Decrystalline Anthracene Oil Collection: After centrifugal separation, the remaining liquid is the decrystalline anthracene oil, which enters the decrystalline anthracene oil tank. The decrystalline anthracene oil flows by gravity into the intermediate decrystalline anthracene oil tank and then is poured into the large decrystalline anthracene oil tank. Subsequent Processing: Decrystalline anthracene oil is a major component in the formulation of wood preservative oils and a raw material for carbon black production. Its high aromatic content, moderate viscosity, and low asphaltenes and impurities make it an ideal raw material for producing mid-to-high-end carbon black products. The viscosity requirements of decrystalline anthracene oil vary depending on its intended use, but the viscosity of decrystalline anthracene oil produced using existing technologies is usually fixed and cannot be adjusted according to its intended application. Summary of the Invention

[0005] Based on this, this application provides a decrystalline anthracene oil production system to solve the technical problem that the decrystalline anthracene oil produced in the prior art usually has a fixed viscosity and cannot be adjusted according to its use.

[0006] The technical solution to the above-mentioned technical problems in this application is as follows:

[0007] A decrystalline anthracene oil production system, comprising:

[0008] The main decrystalline anthracene oil tank is equipped with a main discharge pipe and a main discharge pump located on the main discharge pipe.

[0009] An auxiliary decrystalline anthracene oil tank, wherein an auxiliary discharge pipe and an auxiliary discharge pump are provided on the auxiliary discharge pipe;

[0010] The mixing tank is connected to the outlets of both the main feed pipe and the auxiliary discharge pipe.

[0011] Preferably, the above-mentioned decrystalline anthracene oil production system further includes a secondary decrystalline tank, the outlet of the main discharge pump is connected to a secondary decrystalline material pipe, the other end of the secondary decrystalline material pipe is connected to the inlet of the secondary decrystalline tank, the upper outlet of the secondary decrystalline tank is provided with a secondary discharge pipe, and the other end of the secondary discharge pipe is connected to the mixing tank.

[0012] Preferably, in the above-mentioned decrystalline anthracene oil production system, the bottom outlet of the secondary decrystalline tank is provided with a concentrate pipe, and the other end of the concentrate pipe is connected to the auxiliary decrystalline anthracene oil tank.

[0013] Preferably, the above-mentioned decrystalline anthracene oil production system further includes a backflushing device, which is connected to the main discharge pipe and the auxiliary discharge pipe respectively. The outlets of the main discharge pump and the auxiliary discharge pump are each provided with a discharge pipe, and each discharge pipe is provided with an electric valve, which is electrically connected to the backflushing device.

[0014] Preferably, the above-mentioned decrystalline anthracene oil production system further includes a defect tank, and the mixing tank is connected to the defect tank through a defect material discharge pipe.

[0015] Preferably, in the above-mentioned decrystalline anthracene oil production system, the mixing tank includes a finished product discharge pipe for discharging the finished anthracene oil.

[0016] Preferably, in the above-mentioned decrystalline anthracene oil production system, control valves are provided on the main discharge pipe, the auxiliary discharge pipe, and the secondary discharge pipe.

[0017] Preferably, in the above-mentioned decrystalline anthracene oil production system, the mixing tank, the defective tank, the main discharge pipe, and the auxiliary discharge pipe are all equipped with a heat insulation layer.

[0018] Compared with the prior art, this application has at least the following advantages:

[0019] The decrystalline anthracene oil production system disclosed in this application includes: a main decrystalline anthracene oil tank, which is equipped with a main feed pipe, a main discharge pipe, and a main discharge pump located on the main discharge pipe; an auxiliary decrystalline anthracene oil tank, which is equipped with an auxiliary feed pipe, an auxiliary discharge pipe, and an auxiliary discharge pump located on the auxiliary discharge pipe; and a mixing tank, the outlets of the main feed pipe and the auxiliary discharge pipe being connected to the mixing tank. Anthracene oil collected from the bottom of a tar distillation column is cooled, crystallized, and centrifuged to obtain decrystalline anthracene oil and crude anthracene; this portion of the decrystalline anthracene oil enters the main decrystalline anthracene oil tank; while the crude anthracene undergoes subsequent refining to remove anthracene, phenanthrene, carbazole, etc., to obtain purified anthracene oil, which is then sent to the auxiliary decrystalline anthracene oil tank. Typically, de-isocyanate anthracene oil has a higher viscosity, while decrystalline anthracene oil has a lower viscosity. The decrystalline anthracene oil and de-isocyanate anthracene oil are fed into the mixing tank through the main discharge pipe and the auxiliary discharge pipe, respectively. The two are mixed in the mixing tank, and the feed rate of the two is adjusted by adjusting the flow rate of the main discharge pump and the auxiliary discharge pump to adjust the viscosity of the mixture (mixed anthracene oil) in the mixing tank to meet the viscosity requirements of different applications. Attached Figure Description

[0020] Figure 1 This is a system diagram of a decrystalline anthracene oil production system according to a specific embodiment of this application (rotated 90° to the left).

[0021] In the diagram: Main decrystalline anthracene oil tank 100, main feed pipe 110, main discharge pipe 120, main discharge pump 121, auxiliary decrystalline anthracene oil tank 200, auxiliary feed pipe 210, auxiliary discharge pipe 220, auxiliary discharge pump 221, mixing tank 300, finished product discharge pipe 310, secondary decrystalline tank 400, secondary discharge pipe 410, concentrated liquid pipe 420, secondary decrystalline material pipe 430, backflushing device 500, unqualified tank 600, unqualified material discharge pipe 610, control valve 700, unloading pipe 800, electric valve 810. Detailed Implementation

[0022] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0023] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please refer to Figure 1 In one specific embodiment of this application, a decrystalline anthracene oil production system includes: a main decrystalline anthracene oil tank 100, wherein the main decrystalline anthracene oil tank 100 is provided with a main feed pipe 110, a main discharge pipe 120, and a main discharge pump 121 located on the main discharge pipe 120; an auxiliary decrystalline anthracene oil tank 200, wherein the auxiliary decrystalline anthracene oil tank 200 is provided with an auxiliary feed pipe 210, an auxiliary discharge pipe 220, and an auxiliary discharge pump 221 located on the auxiliary discharge pipe 220; and a mixing tank 300, wherein the outlets of the main feed pipe 110 and the auxiliary discharge pipe 220 are both connected to the mixing tank 300.

[0026] Specifically, the main decrystalline anthracene oil tank 100 is mainly used for the transfer and temporary storage of decrystalline anthracene oil, and the auxiliary decrystalline anthracene oil tank 200 is mainly used for the transfer and temporary storage of de-impure anthracene oil. The sources of the decrystalline anthracene oil and the de-impure anthracene oil are: anthracene oil taken from the bottom of the tar distillation tower is cooled, crystallized, and centrifuged to obtain decrystalline anthracene oil and crude anthracene. This part of the decrystalline anthracene oil enters the decrystalline anthracene oil tank through the main feed pipe 110; while the crude anthracene is subsequently refined to remove phenanthrene, carbazole, etc., to obtain de-impure anthracene oil, which enters the auxiliary anthracene oil tank through the auxiliary feed pipe 210. Typically, de-isolated anthracene oil has a higher viscosity, while decrystalline anthracene oil has a lower viscosity. The decrystalline and deisolated anthracene oils are fed into the mixing tank 300 via the main discharge pipe 120 and auxiliary discharge pipe 220, respectively. They are mixed in the mixing tank 300, and the feed rates of both are adjusted by regulating the flow rates of the main discharge pump 121 and auxiliary discharge pump 221. This allows for adjustment of the viscosity of the mixture (anthracene oil obtained by mixing decrystalline and deisolated anthracene oils) in the mixing tank 300, meeting the viscosity requirements of anthracene oil for different applications. For example, if a higher viscosity of the anthracene oil is required, the flow rate of the auxiliary discharge pump 221 is increased to increase the feed rate of the deisolated anthracene oil, while the flow rate of the main discharge pump 121 is decreased to decrease the feed rate of the decrystalline anthracene oil; the reverse is also true.

[0027] To further and more precisely adjust the viscosity of anthracene oil, in a preferred embodiment, the above-mentioned decrystalline anthracene oil production system further includes a secondary decrystalline tank 400. The outlet of the main discharge pump 121 is connected to a secondary decrystalline material pipe 430, the other end of which is connected to the inlet of the secondary decrystalline tank 400. A secondary discharge pipe 410 is provided at the upper outlet of the secondary decrystalline tank 400, and the other end of which is connected to the mixing tank 300.

[0028] A portion of the decrystalline anthracene oil in the decrystalline anthracene oil tank is transported to the secondary decrystalline tank 400 through the secondary decrystalline feed pipe 430. In the secondary decrystalline tank 400, it undergoes a second decrystalline process to obtain light anthracene oil and concentrated liquid. The viscosity of the light anthracene oil is lower than that of the decrystalline anthracene oil. The light anthracene oil is transported into the mixing tank 300 through the secondary discharge pipe 410, which can dilute the mixture in the mixing tank 300 and play an auxiliary role in adjusting its viscosity, thereby improving the viscosity adjustment accuracy.

[0029] The concentrated liquid separated in the decrystallization tank contains high-viscosity anthracene oil, which can be recycled back into the system. Preferably, the bottom outlet of the secondary decrystallization tank 400 is equipped with a concentrated liquid pipe 420, the other end of which is connected to the auxiliary decrystallization anthracene oil tank 200. The concentrated liquid is sent to the auxiliary decrystallization anthracene oil tank 200 through the concentrated liquid pipe 420 as a supplement to the raw materials. It enters the mixing tank 300 together with the de-impregnated anthracene oil for mixing. This not only helps to adjust the viscosity of the anthracene oil in the mixing tank 300, but also makes full use of the raw materials and avoids waste.

[0030] In other words, the decrystalline anthracene oil undergoes a second decrystallineing process in the decrystalline tank to obtain light anthracene oil and a concentrated liquid. The light anthracene oil is conveyed into the mixing tank 300 through the secondary discharge pipe 410, while the concentrated liquid is sent to the auxiliary decrystalline anthracene oil tank 200 through the concentrated liquid pipe 420 as a supplement to the raw materials. Both are then mixed in the mixing tank 300 along with the de-impregnated anthracene oil. The lower viscosity light anthracene oil and the higher viscosity concentrated liquid both serve to help adjust the viscosity of the anthracene oil in the mixing tank 300, improving the accuracy of viscosity adjustment and making full use of raw materials while avoiding waste.

[0031] Because the viscosity of the de-crystallized anthracene oil and the concentrated liquid produced by the secondary decrystallization tank 400 is high, its flow rate in the pipeline may be low, potentially leading to stagnation and blockage over time. Therefore, the aforementioned de-crystallized anthracene oil production system also includes a backflushing device 500, which is connected to both the main discharge pipe 120 and the auxiliary discharge pipe 220. Both the main discharge pump 121 and the auxiliary discharge pump 221 have discharge pipes 800 at their outlets, each equipped with an electric valve 810 electrically connected to the backflushing device 500. The backflushing device 500 periodically purges the pipeline, and the blown-down blockages are discharged through the discharge pipes 800, effectively preventing pipeline congestion and ensuring normal system operation.

[0032] When the concentration of the mixed liquid in the mixing tank 300 does not meet the actual requirements, it can be collected first. Therefore, the decrystalline anthracene oil production system also includes a defect tank 600. The mixing tank 300 is connected to the defect tank 600 through a defect discharge pipe 610. The defect tank 600 is used to collect defective materials and recycle them to avoid waste.

[0033] Furthermore, the mixing tank 300 is provided with a finished product discharge pipe 310 for the extraction of anthracene oil. When the anthracene oil in the mixing tank 300 is mixed to the required viscosity, it is discharged from the finished product discharge pipe 310 for actual use.

[0034] Furthermore, control valves 700 are installed on the main discharge pipe 120, the auxiliary discharge pipe 220, and the secondary discharge pipe 410. The flow rate of the liquid in the pipeline is adjusted by adjusting the opening of the control valves 700, thereby assisting in the efficient and accurate adjustment of the viscosity of anthracene oil in the mixing tank 300.

[0035] Furthermore, the mixing tank 300, the secondary decrystallization tank 400, the defective tank 600, the main discharge pipe 120, the auxiliary discharge pipe 220, and the secondary discharge pipe 410 are all equipped with insulation layers. The insulation layers ensure that the anthracene oil in the pipelines and equipment maintains good flow conditions, while preventing component eutectic from affecting purity.

[0036] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A system for producing decrystalline anthracene oil, characterized in that, include: The main decrystalline anthracene oil tank is equipped with a main feed pipe, a main discharge pipe and a main discharge pump located on the main discharge pipe; An auxiliary decrystalline anthracene oil tank is provided with an auxiliary feed pipe, an auxiliary discharge pipe and an auxiliary discharge pump located on the auxiliary discharge pipe; The mixing tank is connected to the outlets of both the main feed pipe and the auxiliary discharge pipe.

2. The decrystalline anthracene oil production system as described in claim 1, characterized in that, It also includes a secondary decrystallization tank, the outlet of the main discharge pump is connected to a secondary decrystallization pipe, the other end of the secondary decrystallization pipe is connected to the inlet of the secondary decrystallization tank, the upper outlet of the secondary decrystallization tank is provided with a secondary discharge pipe, and the other end of the secondary discharge pipe is connected to the mixing tank.

3. The decrystalline anthracene oil production system as described in claim 2, characterized in that, The bottom outlet of the secondary crystallizer is equipped with a concentrate pipe, and the other end of the concentrate pipe is connected to the auxiliary crystallizer anthracene oil tank.

4. The decrystalline anthracene oil production system as described in claim 1, characterized in that, It also includes a back-flushing device, which is connected to the main discharge pipe and the auxiliary discharge pipe respectively. The outlets of the main discharge pump and the auxiliary discharge pump are each equipped with a discharge pipe, and each discharge pipe is equipped with an electric valve, which is electrically connected to the back-flushing device.

5. The decrystalline anthracene oil production system as described in claim 1, characterized in that, It also includes a defective tank, and the mixing tank is connected to the defective tank through a defective material discharge pipe.

6. The decrystalline anthracene oil production system as described in claim 1, characterized in that, The mixing tank is equipped with a finished product discharge pipe for discharging the finished product.

7. The decrystalline anthracene oil production system as described in claim 2, characterized in that, Control valves are installed on the main discharge pipe, the auxiliary discharge pipe, and the secondary discharge pipe.

8. The decrystalline anthracene oil production system as described in claim 5, characterized in that, The mixing tank, the defective tank, the main discharge pipe, and the auxiliary discharge pipe are all equipped with insulation layers.

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