Carbazole secondary mother liquor carbolic oil washing system
By using a carbazole secondary mother liquor phenol oil washing system in the carbazole production process, the carbazole secondary mother liquor and phenol oil secondary filtrate are mixed and washed and filtered, the problem of repeated circulation of high boiling substances in the carbazole secondary mother liquor is solved, and energy consumption is reduced and carbazole production is improved.
Patent Information
- Application Number
- CN202422051940.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-23
AI Technical Summary
In the existing carbazole production process, carbazole secondary mother liquor still contains a high carbazole, resulting in repeated circulation of high boiling substances in the material, increasing energy consumption and insufficient finished product output.
The carbazole secondary mother liquor phenol oil washing system is used, and the carbazole secondary mother liquor and phenol oil secondary filtrate are mixed at high temperature. The carbazole secondary mother liquor is washed twice and centrifugal filtration is finally entered into the carbazole crystallizer to extract carbazole to avoid entering the system cycle again.
The circulation of high boiling substances in the system is reduced, energy consumption is reduced, the distillation content and yield of carbazole is increased, and the utilization rate of crude anthracene crystallizer and the processing volume of the distillation column is increased.
Smart Images
Figure CN222942976U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical production equipment, in particular to a carbazole secondary mother liquor phenol oil washing system. Background Art
[0002] The traditional carbazole production process is to separate anthracene and carbazole by distilling crude anthracene, and then crystallize the carbazole fraction to obtain a carbazole semi-finished product and a carbazole primary mother liquor; wherein, the carbazole semi-finished product is crystallized to produce a carbazole finished product; the carbazole primary mother liquor is crystallized to obtain a carbazole secondary mother liquor, which still contains carbazole at a high content of up to 43%, and the carbazole yield in the finished product cannot be improved. The obtained carbazole secondary mother liquor is usually directly returned to the crude anthracene semi-finished product tank, enters the system cycle to re-crystallize the crude anthracene, and then is further utilized as a carbazole raw material for tower distillation. However, this method causes high-boiling substances in the material to circulate repeatedly in the system and cannot be removed from the system, and continuously circulates and accumulates, increasing energy consumption. Summary of the invention
[0003] The utility model aims to solve the problems that in the current carbazole production process, the carbazole secondary mother liquor obtained after the carbazole mother liquor is crystallized contains more carbazole. The prior art adopts a method of returning the crude anthracene to the circulation system to crystallize the crude anthracene and using the crude anthracene as a raw material to enter the distillation, so that the high-boiling substances in the material are repeatedly circulated in the system, which increases energy consumption and has the problem of low finished product output. A carbazole secondary mother liquor phenol oil washing system is provided.
[0004] The utility model is implemented by the following technical solutions:
[0005] A carbazole secondary mother liquid phenol oil washing system comprises a carbazole secondary mother liquid tank and a phenol oil secondary filtrate tank, wherein the carbazole secondary mother liquid tank and the phenol oil secondary filtrate tank are connected to the inlet of a primary mixed oil tank through a carbazole inlet pipe and a phenol oil inlet pipe respectively, the outlet of the primary mixed oil tank is connected to the primary mixed oil transfer tank through a primary mixed oil pipe, the outlet of the primary mixed oil transfer tank is connected to the inlet of a primary filter press, the filtrate outlet of the primary filter press is connected to the filter press filtrate tank, the filter cake outlet of the primary filter press is connected to the primary filter cake silo through a transmission device, the primary filter cake silo is connected to the mixed silo through a hoist, and the outlet of the mixed silo is connected to the inlet of the secondary mixed oil tank through a conveyor belt;
[0006] The inlet of the secondary mixed oil tank is connected to a phenol oil tank, the outlet of the secondary mixed oil tank is connected to a secondary mixed oil transfer tank through a secondary mixed oil pipe, the outlet of the secondary mixed oil transfer tank is connected to the inlet of a secondary filter press, the filtrate outlet of the secondary filter press is connected to the inlet of a phenol oil secondary filtrate tank, the filter cake outlet of the secondary filter press is connected to a secondary filter cake silo through a transmission device, and the outlet of the secondary filter cake silo is connected to a carbazole silo.
[0007] During implementation, the invention comprises a carbazole secondary mother liquor tank and a phenol oil secondary filtrate tank, the inlet of the carbazole secondary mother liquor tank is connected to a secondary mother liquor transfer tank, as the source of the carbazole secondary mother liquor, the carbazole secondary mother liquor tank and the phenol oil secondary filtrate tank are respectively connected to the inlet of a primary mixed oil tank through a carbazole inlet pipe and a phenol oil inlet pipe, the carbazole inlet pipe and the phenol oil inlet pipe are respectively provided with a carbazole inlet pump and a phenol oil inlet pump; the primary mixed oil tank has a high-temperature stirring function, the outlet of the primary mixed oil tank is connected to a primary mixed oil transfer tank through a primary mixed oil pipe, a mixed oil pump is installed on the primary mixed oil pipe, the outlet of the primary mixed oil transfer tank is connected to the inlet of a primary filter press, the outlet of the primary mixed oil transfer tank is connected to the inlet of a primary filter press A filter press pump is installed on the connecting pipeline, the filtrate outlet of the first-level filter press is connected to the filter press filtrate tank, the outlet of the filter press filtrate tank is connected to the carbon black oil system through a pipeline, and the filter cake outlet of the first-level filter press is connected to the first-level filter cake silo through a transmission device. Specifically, the filter cake outlet of the first-level filter press is connected to the first-level heavy-duty feeder, and the outlet end of the first-level heavy-duty feeder is provided with a first-level crusher, and the outlet of the first-level crusher is connected to the input end of the first-level filter cake tube chain machine, and the output end of the first-level filter cake tube chain machine is connected to the first-level filter cake silo, and the end of the first-level filter cake silo is provided with an arch breaking device; the first-level filter cake silo is connected to the mixed silo through a hoist, and the outlet of the mixed silo is connected to the inlet of the second-level mixed oil tank through a conveyor belt;
[0008] The inlet of the secondary mixed oil tank is connected to a phenol oil tank, the outlet of the secondary mixed oil tank is connected to a secondary mixed oil transfer tank through a secondary mixed oil pipe, a mixed oil pump is installed on the secondary mixed oil pipe, the outlet of the secondary mixed oil transfer tank is connected to the inlet of a secondary filter press, a filter press pump is installed on the connecting pipeline between the outlet of the secondary mixed oil transfer tank and the secondary filter press, the filtrate outlet of the secondary filter press is connected to the inlet of the phenol oil secondary filtrate tank, the filter cake outlet of the secondary filter press is connected to the secondary filter cake silo through a transmission device, specifically, the filter cake outlet of the secondary filter press is connected to the secondary heavy-load feeder, the outlet end of the secondary heavy-load feeder is provided with a secondary crusher, the outlet of the secondary crusher is connected to the input end of the secondary filter cake tube chain machine, the output end of the secondary filter cake tube chain machine is connected to the secondary filter cake silo, the end of the secondary filter cake silo is provided with an arch breaking device, and the outlet of the secondary filter cake silo is connected to the carbazole silo.
[0009] When in use, the carbazole secondary mother liquor from the secondary mother liquor transfer tank enters the carbazole secondary mother liquor tank, and the carbazole secondary mother liquor in the carbazole secondary mother liquor tank and the phenol oil secondary filtrate from the phenol oil secondary filtrate tank are stirred and mixed in a high temperature environment in a primary mixed oil tank, so that the carbazole secondary mother liquor and the phenol oil secondary filtrate are fully contacted and mixed, and the carbazole and high boiling substances therein are dissolved in the phenol oil secondary filtrate, and after being fully mixed, they are pumped into the primary mixed oil transfer tank through a mixed oil pump on a primary mixed oil pipe, and the temperature is reduced in the primary mixed oil transfer tank. Since the solubility of carbazole in phenol oil decreases with decreasing temperature, but the solubility of high boiling substances in phenol oil changes little with temperature, the temperature decreases, the solubility of carbazole decreases, and carbazole is precipitated from the phenol oil secondary filtrate, and is pumped into the primary filter press through a filter press pump for filter pressing. After filter pressing, the high boiling substances remain in the filtrate and enter the filter press filtrate tank, and then are sent to the carbon black oil tank for use by the carbon black oil system; the precipitated carbazole remains in the filter cake, and the filter cake is pumped into the primary filter press through a filter press pump. The filter cake outlet of the filter enters the primary heavy-duty feeder, is crushed by the primary crusher at the end of the primary heavy-duty feeder, and is transported to the primary filter cake silo through the primary filter cake tube chain machine. The materials in the primary filter cake silo are crushed by the arch breaking device and then enter the elevator to be transported to the mixing silo. From the outlet of the mixing silo, they enter the secondary mixed oil tank through the conveyor belt, are stirred and mixed with the phenol oil from the phenol oil tank under high temperature, and are fully mixed and dissolved. After being pumped into the secondary mixed oil transfer tank through the mixed oil pump on the secondary mixed oil pipe, the temperature is lowered in the secondary mixed oil transfer tank to precipitate the remaining carbazole from the phenol oil, and are pumped into the secondary filter press through the filter press pump for filtration. After filtration, the filtrate re-enters the phenol oil secondary filtrate tank for mixing with the carbazole secondary mother liquor. The filter cake enters the secondary heavy-duty feeder and is then transported to the secondary filter cake silo through the secondary filter cake tube chain machine. The materials in the secondary filter cake silo enter the carbazole silo through the arch breaking device for subsequent carbazole flakes, packaging, and sales.
[0010] Compared with the prior art, the utility model has the following beneficial effects:
[0011] The utility model provides a carbazole secondary mother liquor phenol oil washing system, which processes the produced carbazole secondary mother liquor through two phenol oil washings and centrifugal filtration, and finally enters the carbazole crystallizer to obtain carbazole, thereby preventing the carbazole secondary mother liquor from entering the system again, reducing the circulation of high-boiling substances in the system, reducing energy consumption, and on the other hand increasing the distillation carbazole content, effectively increasing the output, and increasing the carbazole output; the system improves the utilization rate of the crude anthracene crystallizer, increases the processing capacity of anthracene oil, and simultaneously increases the processing capacity of the distillation tower. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The schematic diagram of the structure of the utility model is shown.
[0013] Figure 2 express Figure 1 A partial enlargement of the left side.
[0014] Figure 3 express Figure 1 A partial enlargement of the right side.
[0015] In the figure: 1-carbazole secondary mother liquor tank, 2-phenol oil secondary filtrate tank, 3-primary mixed oil tank, 4-primary mixed oil transfer tank, 5-primary filter press, 6-filter press filtrate tank, 7-primary heavy-duty feeder, 8-primary crusher, 9-primary filter cake tube chain machine, 10-primary filter cake silo, 11-elevator, 12-mixed silo, 13-conveyor belt, 14-secondary mixed oil tank, 15-phenol oil tank, 16-secondary mixed oil transfer tank, 17-secondary filter press, 18-secondary heavy-duty feeder, 19-secondary crusher, 20-secondary filter cake tube chain machine, 21-secondary filter cake silo, 22-carbazole silo, 23-secondary mother liquor transfer tank, 24-arch breaking device;
[0016] L1-carbazole liquid inlet pipe, L2-phenol oil liquid inlet pipe, L3-first-stage mixing oil pipe, L4-second-stage mixing oil pipe. DETAILED DESCRIPTION
[0017] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.
[0018] A carbazole secondary mother liquor phenol oil washing system, such as Figures 1 to 3As shown: it includes a carbazole secondary mother liquor tank 1 and a phenol oil secondary filtrate tank 2, the inlet of the carbazole secondary mother liquor tank 1 is connected to the secondary mother liquor transfer tank 23, which is the source of the carbazole secondary mother liquor. The carbazole secondary mother liquor tank 1 and the phenol oil secondary filtrate tank 2 are connected to the inlet of a primary mixed oil tank 3 through a carbazole inlet pipe L1 and a phenol oil inlet pipe L2, respectively. The carbazole inlet pipe L1 and the phenol oil inlet pipe L2 are respectively provided with a carbazole inlet pump and a phenol oil inlet pump; the primary mixed oil tank 3 has a high-temperature stirring function, the outlet of the primary mixed oil tank 3 is connected to the primary mixed oil transfer tank 4 through a primary mixed oil pipe L3, a mixed oil pump is installed on the primary mixed oil pipe L3, the outlet of the primary mixed oil transfer tank 4 is connected to the inlet of a primary filter press 5, and the outlet of the primary mixed oil transfer tank 4 is connected to the connection of the primary filter press 5. A filter press pump is installed on the pipe connection line, the filtrate outlet of the first-level filter press 5 is connected to the filter press filtrate tank 6, the outlet of the filter press filtrate tank 6 is connected to the carbon black oil system through a pipeline, and the filter cake outlet of the first-level filter press 5 is connected to the first-level filter cake silo 10 through a transmission device, specifically, the filter cake outlet of the first-level filter press 5 is connected to the first-level heavy-duty feeder 7, the outlet end of the first-level heavy-duty feeder 7 is provided with a first-level crusher 8, the outlet of the first-level crusher 8 is connected to the input end of the first-level filter cake tube chain machine 9, the output end of the first-level filter cake tube chain machine 9 is connected to the first-level filter cake silo 10, and the end of the first-level filter cake silo 10 is provided with an arch breaking device; the first-level filter cake silo 10 is connected to the mixed silo 12 through the elevator 11, and the outlet of the mixed silo 12 is connected to the inlet of the second-level mixed oil tank 14 through the conveyor belt 13;
[0019] The inlet of the secondary mixed oil tank 14 is connected to a phenol oil tank 15, the outlet of the secondary mixed oil tank 14 is connected to a secondary mixed oil transfer tank 16 through a secondary mixed oil pipe L4, a mixed oil pump is installed on the secondary mixed oil pipe L4, the outlet of the secondary mixed oil transfer tank 16 is connected to the inlet of a secondary filter press 17, a filter press pump is installed on the connecting pipeline between the outlet of the secondary mixed oil transfer tank 16 and the secondary filter press 17, the filtrate outlet of the secondary filter press 17 is connected to the inlet of the phenol oil secondary filtrate tank 2, and the secondary filter press 1 The filter cake outlet of 7 is connected with the secondary filter cake silo 21 through a transmission device. Specifically, the filter cake outlet of the secondary filter press 17 is connected with the secondary heavy-load feeder 18. The outlet end of the secondary heavy-load feeder 18 is provided with a secondary crusher 19. The outlet of the secondary crusher 19 is connected with the input end of the secondary filter cake tube chain machine 20. The output end of the secondary filter cake tube chain machine 20 is connected with the secondary filter cake silo 21. The end of the secondary filter cake silo 21 is provided with an arch breaking device, and the outlet of the secondary filter cake silo 21 is connected with the carbazole silo 22.
[0020] When in use, the carbazole secondary mother liquid from the secondary mother liquid transfer tank 23 enters the carbazole secondary mother liquid tank 1, and the carbazole secondary mother liquid in the carbazole secondary mother liquid tank 1 and the phenol oil secondary filtrate from the phenol oil secondary filtrate tank 2 are stirred and mixed in a high temperature environment in the primary mixed oil tank 3, so that the carbazole secondary mother liquid and the phenol oil secondary filtrate are fully contacted and mixed, and the carbazole and high boiling substances therein are dissolved in the phenol oil secondary filtrate. After being fully mixed, they are pumped into the primary mixed oil transfer tank 4 through the mixed oil pump on the primary mixed oil pipe L3, and in the primary mixed oil tank 3, the carbazole secondary mother liquid and the phenol oil secondary filtrate are fully contacted and mixed, and the carbazole and high boiling substances therein are dissolved in the phenol oil secondary filtrate. The temperature is lowered in the transfer tank 4. Since the solubility of carbazole in phenol oil decreases with decreasing temperature, but the solubility of high-boiling substances in phenol oil changes little with temperature, the temperature decreases, the solubility of carbazole decreases, and carbazole precipitates from the secondary filtrate of phenol oil. The filtrate is pumped into the primary filter press 5 for pressure filtration through the filter press pump. After the pressure filtration, the high-boiling substances remain in the filtrate and enter the filter press filtrate tank 6, and then are sent to the carbon black oil tank for use by the carbon black oil system; the precipitated carbazole remains in the filter cake, and the filter cake passes through the filter cake outlet of the primary filter press 5 and enters the primary heavy-load feeder. The material in the first filter cake silo 10 is crushed by the first crusher 8 at the end of the first heavy-duty feeder 7, and then conveyed to the first filter cake silo 10 by the first filter cake tube chain machine 9. The material in the first filter cake silo 10 is crushed by the arch breaking device 24 and then conveyed to the mixing silo 12 by the elevator 11. From the outlet of the mixing silo 12, it enters the second mixed oil tank 14 through the conveyor belt 13, and is stirred and mixed with the phenol oil from the phenol oil tank 15 under high temperature. After being fully mixed and dissolved, it is pumped into the second mixed oil tank through the mixed oil pump on the second mixed oil pipe L4. The oil transfer tank 16 is cooled in the secondary mixed oil transfer tank 16 to precipitate the remaining carbazole from the phenol oil, and is pumped into the secondary filter press 17 for filtration through a filter press pump. After filtration, the filtrate re-enters the phenol oil secondary filtrate tank 2 for mixing with the carbazole secondary mother liquor. The filter cake enters the secondary heavy-duty feeder 18, and then is transported to the secondary filter cake silo 21 through the secondary filter cake tube chain machine 20. The material in the secondary filter cake silo 21 enters the carbazole silo 22 through the arch breaking device 24 for subsequent carbazole flake formation, packaging, and sale.
[0021] The scope of protection claimed by the present invention is not limited to the above specific implementation methods. For those skilled in the art, the present invention may have various deformations and changes. Any modification, improvement and equivalent substitution made within the concept and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A carbazole secondary mother liquor phenol oil washing system, characterized in that: The invention comprises a carbazole secondary mother liquid tank (1) and a phenol oil secondary filtrate tank (2), wherein the carbazole secondary mother liquid tank (1) and the phenol oil secondary filtrate tank (2) are connected to the inlet of a primary mixed oil tank (3) through a carbazole inlet pipe (L1) and a phenol oil inlet pipe (L2) respectively, the outlet of the primary mixed oil tank (3) is connected to a primary mixed oil transfer tank (4) through a primary mixed oil pipe (L3), the outlet of the primary mixed oil transfer tank (4) is connected to the inlet of a primary filter press (5), the filtrate outlet of the primary filter press (5) is connected to a filter press filtrate tank (6), the filter cake outlet of the primary filter press (5) is connected to a primary filter cake silo (10) through a transmission device, the primary filter cake silo (10) is connected to a mixed silo (12) through a hoist (11), and the outlet of the mixed silo (12) is connected to the inlet of a secondary mixed oil tank (14) through a conveyor belt (13); The inlet of the secondary mixed oil tank (14) is connected to a phenol oil tank (15); the outlet of the secondary mixed oil tank (14) is connected to a secondary mixed oil transfer tank (16) via a secondary mixed oil pipe (L4); the outlet of the secondary mixed oil transfer tank (16) is connected to the inlet of a secondary filter press (17); the filtrate outlet of the secondary filter press (17) is connected to the inlet of a phenol oil secondary filtrate tank (2); the filter cake outlet of the secondary filter press (17) is connected to a secondary filter cake silo (21) via a transmission device; and the outlet of the secondary filter cake silo (21) is connected to a carbazole silo (22).
2. A carbazole secondary mother liquor phenol oil washing system according to claim 1, characterized in that: The filter cake outlet of the first-stage filter press (5) is connected to a first-stage heavy-load feeder (7), the outlet end of the first-stage heavy-load feeder (7) is provided with a first-stage crusher (8), the outlet of the first-stage crusher (8) is connected to the input end of a first-stage filter cake tube chain machine (9), and the output end of the first-stage filter cake tube chain machine (9) is connected to a first-stage filter cake silo (10).
3. A carbazole secondary mother liquor phenol oil washing system according to claim 1, characterized in that: The filter cake outlet of the secondary filter press (17) is connected to the secondary heavy-load feeder (18), the outlet end of the secondary heavy-load feeder (18) is provided with a secondary crusher (19), the outlet of the secondary crusher (19) is connected to the input end of the secondary filter cake tube chain machine (20), and the output end of the secondary filter cake tube chain machine (20) is connected to the secondary filter cake silo (21).
4. A carbazole secondary mother liquor phenol oil washing system according to claim 1, characterized in that: The inlet of the carbazole secondary mother liquor tank (1) is connected to the secondary mother liquor transfer tank (23).
5. A carbazole secondary mother liquor phenol oil washing system according to claim 1, characterized in that: The carbazole liquid inlet pipe (L1) and the phenol oil liquid inlet pipe (L2) are provided with a carbazole liquid inlet pump and a phenol oil liquid inlet pump respectively; The first-stage mixing oil pipe (L3) and the second-stage mixing oil pipe (L4) are each equipped with a mixing oil pump.
6. A carbazole secondary mother liquor phenol oil washing system according to claim 1, characterized in that: A filter press pump is installed on the connecting pipeline between the outlet of the first-stage mixed oil transfer tank (4) and the first-stage filter press (5), and a filter press pump is installed on the connecting pipeline between the outlet of the second-stage mixed oil transfer tank (16) and the second-stage filter press (17).
7. A carbazole secondary mother liquor phenol oil washing system according to claim 1, characterized in that: The outlet of the filter press filtrate tank (6) is connected to the carbon black oil system via a pipeline.
8. A carbazole secondary mother liquor phenol oil washing system according to claim 1, characterized in that: Arch breaking devices (24) are provided at the ends of the first filter cake silo (10) and the second filter cake silo (21).