Coal gas water heavy aromatic hydrocarbon separation device and method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XINJIANG UNIVERSITY
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-23
AI Technical Summary
Existing technologies are insufficient for efficiently separating heavy aromatics from coal gas water, resulting in their inability to be utilized on a large scale, high separation costs, and low product purity, thus failing to meet the goal of efficient utilization of heavy aromatic resources.
The separation process employs a series of steps, including vacuum filtration, centrifugal extraction, and column chromatography. It utilizes a vacuum pump, a centrifugal motor, and multiple chromatography columns for separation, combined with extraction and elution processes using different solvents, to achieve efficient separation of heavy aromatic hydrocarbons.
By employing a step-by-step separation method, energy consumption is significantly reduced, the purity and separation efficiency of heavy aromatics are improved, and the relative content of heavy aromatics is increased, thus achieving efficient separation and enrichment of heavy aromatics.
Smart Images
Figure CN120423742B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coal gas water treatment, specifically to a device and method for separating heavy aromatic hydrocarbons from coal gas water. Background Technology
[0002] Coal gasification is a clean and efficient technology that converts coal into syngas, primarily used in the fuel and chemical industries. The gasification process produces a coal gas-water mixture, and the coal gas-water separation process, as a core technology, is crucial for the efficient conversion of coal resources. This process first separates tar, dust, phenols, ammonia, and other substances from the water. On the one hand, it recovers valuable substances from the wastewater, such as heavy aromatics, generating certain economic benefits; on the other hand, it ensures that the wastewater meets discharge standards or can be reused.
[0003] Heavy aromatics are a class of hydrocarbons composed of monocyclic, bicyclic, and polycyclic aromatic hydrocarbons, with C9, C1, and C2 as their main components. 10 Heavy aromatics, primarily composed of aromatic compounds, have boiling points between 150-250℃. Heavy aromatics separated by gas-water separation units are crucial raw materials for the chemical industry. However, due to the relatively similar boiling points of their basic components and high separation costs, large-scale development and utilization are difficult to achieve, failing to meet the goal of efficiently utilizing the ever-growing demand for heavy aromatic resources.
[0004] Therefore, we propose a device and method for separating heavy aromatics from coal gas and water. Summary of the Invention
[0005] To address the aforementioned shortcomings of the prior art, this invention provides a device and method for separating heavy aromatic hydrocarbons from coal gas and water.
[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:
[0007] A coal gas-water heavy aromatics separation device includes: a vacuum filtration assembly with a top opening for vacuum filtration of heavy aromatics feedstock; a centrifugal extraction assembly with its feed end connected to the discharge end of the vacuum filtration assembly for centrifugal extraction of the extract after filtration; and a chromatography assembly connected to the discharge end of the centrifugal extraction assembly via a feeding assembly, wherein the feeding assembly feeds the fluid extracted by the centrifugal extraction assembly into the chromatography assembly, and the chromatography assembly performs column chromatography on the fluid extracted by the centrifugal extraction assembly.
[0008] The heavy aromatic hydrocarbons are separated in stages by vacuum filtration, centrifugal extraction and chromatography. From simple extraction to subsequent column chromatography, different valuable compounds in heavy aromatic hydrocarbons are separated and enriched. Compared with the separation of heavy aromatic hydrocarbons by fractionation tower, the energy consumption is lower and the purity of the separated target product is higher.
[0009] Further defining the vacuum filtration assembly, it includes a filter cylinder, a vacuum tube, a filter cover, and a vacuum pump. The filter cylinder is a cylindrical shape with an open top. The filter cover is fixedly mounted on the feed end of the vacuum tube. The feed end of the vacuum tube is vertically located at the bottom of the filter cylinder, so that the filter cover contacts the bottom of the filter cylinder. The discharge end of the vacuum tube is connected to the feed end of the vacuum pump. By adding heavy aromatic raw materials and corresponding extraction solvents into the filter cylinder, the vacuum pump is started. The vacuum pump draws the liquid from the heavy aromatic raw materials from the filter cover into the vacuum tube, and then sends it to the next device, achieving preliminary vacuum filtration. The structure is simple and the effect is good.
[0010] Further defining the centrifugal extraction assembly, it includes a rotating drum, a centrifugal motor, a first feed inlet, a second feed inlet, a heavy phase outlet, and a light phase outlet. The centrifugal motor is fixedly mounted on the top of the rotating drum and drives the drum inside the rotating drum. The first feed inlet and the second feed inlet are located opposite each other on the left and right sides of the lower part of the rotating drum. Both the first feed inlet and the second feed inlet are connected to the turbine disk inside the rotating drum. The heavy phase outlet and the light phase outlet are also located opposite each other on the left and right sides of the upper part of the rotating drum. The height of the heavy phase outlet is lower than the height of the light phase outlet.
[0011] The discharge end of the vacuum pump is connected to the first inlet, and the second inlet is connected to the main feed pipe. The main feed pipe is vertically spaced with the first feed branch pipe and the second feed branch pipe. The first feed branch pipe and the second feed branch pipe are each equipped with an on / off valve, and their bottom ends are respectively placed in the first storage cylinder and the second storage cylinder. A three-way valve is connected to the heavy phase outlet. The inlet end of the three-way valve is connected to the light phase outlet, the outlet end is connected to the feed end of the feeding assembly, and the reversing end is connected to the return pipe. The end of the return pipe is placed in the second storage cylinder.
[0012] By setting a three-way valve and a return pipe at the light phase outlet, and setting a first feed branch pipe and a second feed branch pipe, the first storage cylinder serves as a container for the extraction solvent of the first centrifugal extraction. By storing the light phase mixture extracted in the first centrifugal extraction in the second storage cylinder, the light phase mixture in the second storage cylinder can be centrifuged again by switching the on and off valves, which can make the mixture extraction and separation more refined and thorough.
[0013] Further defining the feeding assembly, it includes a feeding pipe, a feeding auger, and a feeding motor; the outlet end of the three-way valve is connected to the inlet end of the feeding pipe, the feeding auger is located inside the feeding pipe, and the feeding motor is located at one end of the feeding pipe, with its output shaft extending into the feeding pipe and fixedly connected to the feeding auger.
[0014] Further defining the chromatography assembly, it includes multiple chromatography columns, a feed pipe, a main discharge pipe, a first discharge branch pipe, a second discharge branch pipe, a first collection cylinder, and a second collection cylinder. The multiple chromatography columns are arranged in parallel, with adjacent columns connected end to end. The feed end of the first chromatography column is connected to the discharge end of the feed pipe, and the main discharge pipe is connected to the discharge end of the last chromatography column. The first and second discharge branch pipes are vertically spaced on the main discharge pipe, and their ends are located in the first and second collection cylinders, respectively. Both the first and second discharge branch pipes are equipped with discharge valves for controlling their opening and closing.
[0015] The extract fed from the feed tube is subjected to column chromatography using multiple chromatography columns. Multiple chromatography columns can achieve more thorough chromatography and higher product purity. Setting up a first and a second discharge branch makes it easier to collect two different chromatographic products.
[0016] Furthermore, the feeding pipe is set at an angle of 15°-30° along the feeding direction; the angled feeding pipe can prevent material blockage or stratification.
[0017] A separation method for separating heavy aromatics using the aforementioned coal gas-water heavy aromatics separation device includes the following steps:
[0018] S1. Mix the heavy aromatic fluid with carbon disulfide at a mass ratio of 1:10, add the mixture into the filter cartridge, turn on the vacuum pump to filter the mixture, and the filtered extract B enters the vacuum tube from the filter cover. The vacuum pump delivers the extract B to the centrifugal extraction assembly. The pore size of the filter cover is 0.45μm.
[0019] S2. Before extractant B enters the drum from the first inlet, extractant B: petroleum ether: methanol are mixed in the first storage tank at a mass ratio of 1:8:4. The on / off valve on the first feed branch is opened, extractant B enters the drum from the first inlet, and the mixture of petroleum ether and methanol enters the drum from the second inlet for initial centrifugal extraction. The petroleum ether phase C extracted in the first extraction is discharged from the light phase outlet as the light phase and stored. The methanol phase D and carbon disulfide phase E are discharged from the heavy phase outlet. At this time, the three-way valve is adjusted to connect the heavy phase outlet and the return pipe, and the mixture of methanol phase D and carbon disulfide phase E enters the second storage tank.
[0020] S3. After the initial extraction is complete, close the on / off valve on the first feed branch pipe, open the on / off valve on the second feed branch pipe, and adjust the three-way valve to connect the heavy phase outlet and the feed end of the feed pipe. The mixture of methanol phase D and carbon disulfide phase E enters the drum from the second inlet for a second centrifugal extraction. Methanol phase D, as the light phase, is discharged from the light phase outlet for storage, while carbon disulfide phase E, as the heavy phase, enters the feed pipe. The feeding auger sends carbon disulfide phase E into the chromatography assembly for column chromatography. During both extraction processes, the extraction motor speed is 3000 rpm and the drum separation factor is 2000 g.
[0021] S4. Before the carbon disulfide phase E enters the chromatography column, pre-dried 400-mesh silica gel is packed into the column at a density of 0.45 g / cm³. 3 After the carbon disulfide phase E enters the chromatography column, petroleum ether is added through the feed tube on the first chromatography column to elute the carbon disulfide phase E. At the same time, the discharge valve on the first discharge branch pipe located at the far end of the discharge main pipe is opened to collect the eluted alkane compound F into the first collection cylinder.
[0022] S5. After observing that the alkane compound F discharged from the first discharge branch pipe becomes colorless, add petroleum ether and ethyl acetate in a mass ratio of 10:1 through the feed pipe for elution again. When the colored eluent is observed to be discharged, close the discharge valve on the first discharge branch pipe and open the discharge valve on the second discharge branch pipe to collect the colored polycyclic aromatic hydrocarbon compound G. When the discharged eluent is observed to become colorless, close the chromatography unit to complete the separation of heavy aromatic hydrocarbons.
[0023] This separation method first uses a vacuum filtration assembly to preliminarily extract heavy aromatics, achieving an aromatic content of over 50% in extract B. Then, extract B undergoes dual-solvent extraction using petroleum ether and methanol via a centrifugal extraction assembly. After the two extractions, the relative content of aromatics in the carbon disulfide phase E is further increased, while the relative content of alkanes and other heteroatom-containing compounds is further reduced. Using carbon disulfide phase E as the raw material for column chromatography, continuous multiple column chromatography is performed, achieving a relative aromatic content of over 80% in the polycyclic aromatic hydrocarbon compound G. This stepwise separation and enrichment method significantly improves the relative aromatic content and purity of the products obtained from the separation of heavy aromatics.
[0024] The beneficial effects of this invention are as follows: by setting up a vacuum filtration component, a centrifugal extraction component, and a chromatography component, heavy aromatics are extracted layer by layer. Compared with the separation of heavy aromatics in existing fractionation towers, the energy consumption is lower and the separated products are of higher precision. Attached Figure Description
[0025] Figure 1 This is a simplified schematic diagram showing the connection relationship of the various devices in this invention;
[0026] Figure 2 A bar chart showing the content of each substance in extract B;
[0027] Figure 3 Bar chart showing the content of each substance in petroleum ether phase C, methanol phase D, and carbon disulfide phase E;
[0028] Figure 4 This is a bar chart showing the content of each substance in alkane compound F and polycyclic aromatic hydrocarbon compound G.
[0029] The symbols for each component are as follows:
[0030] Vacuum filtration assembly 1, filter cylinder 11, vacuum tube 12, filter cover 13, vacuum pump 14, centrifugal extraction assembly 2, drum 21, centrifugal motor 22, first feed inlet 23, second feed inlet 24, heavy phase outlet 25, light phase outlet 26, main feed pipe 27, first feed branch pipe 28, second feed branch pipe 29, on / off valve 210, first storage cylinder 211, second storage cylinder 212, three-way valve 213, return pipe 214, feeding assembly 3, feeding pipe 31, feeding auger 32, feeding motor 33, chromatography assembly 4, chromatography column 41, feeding pipe 42, main discharge pipe 43, first discharge branch pipe 44, second discharge branch pipe 45, first collection cylinder 46, second collection cylinder 47, discharge valve 48. Detailed Implementation
[0031] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.
[0032] Example:
[0033] like Figure 1As shown, a heavy aromatics separation device for coal gas and water includes a vacuum filtration assembly 1, a centrifugal extraction assembly 2, a feeding assembly 3, and a chromatography assembly 4. The vacuum filtration assembly 1 has an open top for vacuum filtration of the heavy aromatics feedstock. The vacuum filtration assembly 1 includes a filter cylinder 11, a vacuum tube 12, a filter cover 13, and a vacuum pump 14. The filter cylinder 11 is a cylindrical shape with an open top. The filter cover 13 is fixedly mounted at the feed end of the vacuum tube 12. The feed end of the vacuum tube 12 is vertically located at the bottom of the filter cylinder 11, so that the filter cover 13 contacts the bottom of the filter cylinder 11. The discharge end of the vacuum tube 12 is connected to the feed end of the vacuum pump 14. The centrifugal extraction assembly 2 is used to filter the heavy aromatics feedstock from the vacuum filtration assembly 1. The filtered extract is centrifuged for extraction. The centrifugal extraction assembly 2 includes a drum 21, a centrifugal motor 22, a first inlet 23, a second inlet 24, a heavy phase outlet 25, and a light phase outlet 26. The centrifugal motor 22 is fixedly mounted on the top of the drum 21 and drives the drum inside the drum 21. The first inlet 23 and the second inlet 24 are located opposite each other on the left and right sides of the lower part of the drum 21, and both the first inlet 23 and the second inlet 24 are connected to the turbine disk inside the drum 21. The heavy phase outlet 25 and the light phase outlet 26 are also located opposite each other on the left and right sides of the upper part of the drum 21, with the height of the heavy phase outlet 25 lower than the height of the light phase outlet 26. A vacuum pump 14 is also included. The discharge end of the feed assembly 4 is connected to the first feed inlet 23. The second feed inlet 24 is connected to the feed main pipe 27. The feed main pipe 27 is vertically spaced with a first feed branch pipe 28 and a second feed branch pipe 29. The first feed branch pipe 28 and the second feed branch pipe 29 are each equipped with an on / off valve 210, and their bottom ends are respectively placed in the first storage cylinder 211 and the second storage cylinder 212. The heavy phase outlet 25 is connected to a three-way valve 213. The inlet end of the three-way valve 213 is connected to the light phase outlet 26, the outlet end is connected to the feed end of the feed assembly 3, and the reversing end is connected to a return pipe 214. The end of the return pipe 214 is placed in the second storage cylinder 212. The chromatography assembly 4 is connected to the feed assembly 3 and the centrifugal extraction assembly. The discharge end of component 2 is connected to the feeding assembly 3, which includes a feeding pipe 31, a feeding auger 32, and a feeding motor 33. The outlet end of the three-way valve 213 is connected to the inlet end of the feeding pipe 31. The feeding auger 32 is located inside the feeding pipe 31. The feeding motor 33 is located at one end of the feeding pipe 31, and its output shaft extends into the feeding pipe 31 and is fixedly connected to the feeding auger 32. The feeding pipe 31 is inclined at 20° along the feeding direction. The chromatography assembly 4 is used to perform column chromatography on the fluid extracted by the centrifugal extraction assembly 2. The chromatography assembly 4 includes multiple chromatography columns 41, a feeding pipe 42, a discharge main pipe 43, a first discharge branch pipe 44, a second discharge branch pipe 45, a first collection cylinder 46, and a second collection cylinder 47.Multiple chromatography columns 41 are arranged in parallel, with adjacent columns 41 connected end-to-end. The feed end of the first column 41 is connected to the discharge end of the feed pipe 31. The main discharge pipe 43 is connected to the discharge end of the last column 41. A first discharge branch pipe 44 and a second discharge branch pipe 45 are vertically spaced on the main discharge pipe 43. The ends of the first discharge branch pipe 44 and the second discharge branch pipe 45 are located in the first collection cylinder 46 and the second collection cylinder 47, respectively. Each of the first discharge branch pipe 44 and the second discharge branch pipe 45 is equipped with a discharge valve 48 for controlling opening and closing.
[0034] Heavy aromatics are separated in stages using a vacuum filtration assembly 1, a centrifugal extraction assembly 2, and a chromatography assembly 4. This process progresses from simple extraction to subsequent column chromatography, achieving the separation and enrichment of different valuable compounds within the heavy aromatics. Compared to separation via a fractionation column, this method consumes less energy and produces a higher purity of the target product. By adding heavy aromatics feedstock and the corresponding extraction solvent to the filter cartridge 11 and activating the vacuum pump 14, the liquid from the heavy aromatics feedstock is drawn from the filter shroud 13 into the vacuum tube 12, and then pumped into the next stage of the process, achieving preliminary vacuum filtration. This method is simple in structure and effective. A three-way valve 213 and a return pipe 214 are installed at the light phase outlet 26, and further details are provided. The first feed branch pipe 28 and the second feed branch pipe 29, and the first storage cylinder 211 serve as the container for the extraction solvent in the first centrifugal extraction. The light phase mixture extracted in the first centrifugal extraction is stored in the second storage cylinder 212. The light phase mixture in the second storage cylinder 212 can be subjected to a second centrifugal extraction by switching the on / off valve 210, which can make the mixture extraction and separation more refined and thorough. The inclined feed pipe 31 can avoid material blockage or stratification. The extract delivered from the feed pipe 31 is subjected to column chromatography by multiple chromatography columns 41. Multiple chromatography columns 41 can achieve more thorough chromatography and higher product purity. The first discharge branch pipe 44 and the second discharge branch pipe 45 make it easier to collect two different chromatography products.
[0035] A separation method for separating heavy aromatics using the aforementioned coal gas-water heavy aromatics separation device includes the following steps:
[0036] S1. Mix the heavy aromatic fluid with carbon disulfide at a mass ratio of 1:10, add the mixture into the filter cartridge, turn on the vacuum pump 14 to filter the mixture, and the filtered extract B enters the vacuum tube 12 from the filter cover 13. The vacuum pump 14 delivers the extract B to the centrifugal extraction assembly 2. The pore size of the filter cover 13 is 0.45μm.
[0037] S2. Before the extractant B enters the drum 21 from the first inlet, the extractant B: petroleum ether: methanol are mixed in the first storage cylinder 211 at a mass ratio of 1:8:4. The on / off valve 210 on the first feed branch pipe 28 is opened, the extractant B enters the drum 21 from the first inlet, and the mixture of petroleum ether and methanol enters the drum 21 from the second inlet for the first centrifugal extraction. The petroleum ether phase C extracted in the first extraction is discharged from the light phase outlet 26 as the light phase and stored. The methanol phase D and carbon disulfide phase E are discharged from the heavy phase outlet 25. At this time, the three-way valve 213 is adjusted to connect the heavy phase outlet 25 and the return pipe 214, and the mixture of methanol phase D and carbon disulfide phase E enters the second storage cylinder 212.
[0038] S3. After the initial extraction is complete, close the on / off valve 210 on the first feed branch pipe 28, open the on / off valve 210 on the second feed branch pipe 29, and adjust the three-way valve 213 to connect the heavy phase outlet 25 and the feed end of the feed pipe 31. The mixture of methanol phase D and carbon disulfide phase E enters the drum 21 from the second inlet for a second centrifugal extraction. Methanol phase D, as the light phase, is discharged from the light phase outlet 26 for storage, while carbon disulfide phase E, as the heavy phase, enters the feed pipe 31. The feed auger 32 feeds carbon disulfide phase E into the chromatography assembly 4 for column chromatography. During both extraction processes, the speed of the extraction motor is 3000 rpm and the separation factor of the drum in the drum 21 is 2000 g.
[0039] S4. Before the carbon disulfide phase E enters the chromatography column 41, 400-mesh pre-dried silica gel is filled into the chromatography column 41 with a packing density of 0.45 g / cm3. After the carbon disulfide phase E enters the chromatography column 41, petroleum ether is added through the feed pipe 42 on the first chromatography column 41 to elute the carbon disulfide phase E. At the same time, the discharge valve 48 on the first discharge branch pipe 44 located at the far end of the discharge main pipe 43 is opened to collect the eluted alkane compounds F into the first collection cylinder 46.
[0040] S5. When the alkane compound F discharged from the first discharge branch pipe 44 is observed to turn colorless, petroleum ether and ethyl acetate with a mass ratio of 10:1 are added again from the feed pipe 42 for elution. When the colored eluent is observed to be discharged, the discharge valve 48 on the first discharge branch pipe 44 is closed and the discharge valve 48 on the second discharge branch pipe 45 is opened to collect the colored polycyclic aromatic hydrocarbon compound G. When the discharged eluent is observed to turn colorless, the chromatography component 4 is closed to complete the separation of heavy aromatic hydrocarbons.
[0041] like Figures 2-4As shown, this separation method first uses vacuum filtration assembly 1 to perform preliminary extraction of heavy aromatics, achieving an aromatic content of over 50% in extract B. Then, extract B undergoes dual solvent extraction using petroleum ether and methanol via centrifugal extraction assembly 2. After two extractions, the relative content of aromatics in carbon disulfide phase E is further increased, while the relative content of alkanes and other heteroatom-containing compounds is further reduced. Carbon disulfide phase E is selected as the raw material for column chromatography, and continuous multiple column chromatography is performed using chromatography assembly 4. The relative content of aromatics in polycyclic aromatic hydrocarbon compound G can reach over 80%. Through this stepwise separation and enrichment method, the relative content of aromatics in the product obtained from the separation of heavy aromatics is greatly increased, thus improving purity.
Claims
1. A heavy aromatic hydrocarbon separation device for coal gas and water, characterized in that, include: Vacuum filtration assembly (1) with a top opening for vacuum filtration of heavy aromatics feedstock; Centrifugal extraction assembly (2), with its feed end connected to the discharge end of the vacuum filtration assembly (1), is used to centrifuge and extract the extract after filtration by the vacuum filtration assembly (1). The chromatography component (4) is connected to the discharge end of the centrifugal extraction component (2) via the feeding component (3). The feeding component (3) is used to feed the fluid extracted by the centrifugal extraction component (2) into the chromatography component (4). The chromatography component (4) is used to perform column chromatography on the fluid extracted by the centrifugal extraction component (2).
2. The gas-water heavy aromatics separation device according to claim 1, characterized in that, The vacuum filtration assembly (1) includes a filter cylinder (11), a vacuum tube (12), a filter cover (13), and a vacuum pump (14). The filter cylinder (11) is a cylindrical shape with an open top. The filter cover (13) is fixedly installed at the feed end of the vacuum tube (12). The feed end of the vacuum tube (12) is vertically located at the bottom of the filter cylinder (11), so that the filter cover (13) is in contact with the bottom of the filter cylinder (11). The discharge end of the vacuum tube (12) is connected to the feed end of the vacuum pump (14).
3. The gas-water heavy aromatics separation device according to claim 2, characterized in that, The centrifugal extraction assembly (2) includes a drum (21), a centrifugal motor (22), a first feed inlet (23), a second feed inlet (24), a heavy phase outlet (25), and a light phase outlet (26). The centrifugal motor (22) is fixedly mounted on the top of the drum (21) and drives the drum inside the drum (21). The first feed inlet (23) and the second feed inlet (24) are positioned opposite each other on the left and right sides of the lower part of the drum (21). Both the first feed inlet (23) and the second feed inlet (24) are connected to the turbine disk inside the drum (21). The heavy phase outlet (25) and the light phase outlet (26) are also positioned opposite each other on the left and right sides of the upper part of the drum (21). The height of the heavy phase outlet (25) is lower than the height of the light phase outlet (26). The discharge end of the vacuum pump (14) is connected to the first feed port (23). The second feed port (24) is connected to the feed main pipe (27). The feed main pipe (27) is vertically spaced with a first feed branch pipe (28) and a second feed branch pipe (29). The first feed branch pipe (28) and the second feed branch pipe (29) are each equipped with an on / off valve (210), and their bottom ends are respectively placed in the first storage cylinder (211) and the second storage cylinder (212). The heavy phase outlet (25) is connected to a three-way valve (213). The inlet end of the three-way valve (213) is connected to the light phase outlet (26), the outlet end is connected to the feed end of the feeding assembly (3), and the reversing end is connected to a return pipe (214). The end of the return pipe (214) is placed in the second storage cylinder (212).
4. The gas-water heavy aromatics separation device according to claim 3, characterized in that, The feeding assembly (3) includes a feeding pipe (31), a feeding auger (32), and a feeding motor (33); the outlet end of the three-way valve (213) is connected to the inlet end of the feeding pipe (31), the feeding auger (32) is located inside the feeding pipe (31), the feeding motor (33) is located at one end of the feeding pipe (31), and its output shaft extends into the feeding pipe (31) and is fixedly connected to the feeding auger (32).
5. The gas-water heavy aromatics separation device according to claim 4, characterized in that, The chromatography assembly (4) includes multiple chromatography columns (41), a feed pipe (42), a main discharge pipe (43), a first discharge branch pipe (44), a second discharge branch pipe (45), a first collection cylinder (46), and a second collection cylinder (47). The multiple chromatography columns (41) are arranged in parallel, and adjacent chromatography columns (41) are connected end to end. The feed end of the first chromatography column (41) is connected to the discharge end of the feed pipe (31), and the main discharge pipe (43) is connected to the last... The discharge end of the chromatography column (41) is connected to the end of the column. The first discharge branch pipe (44) and the second discharge branch pipe (45) are vertically spaced on the discharge main pipe (43). The ends of the first discharge branch pipe (44) and the second discharge branch pipe (45) are respectively located in the first collection cylinder (46) and the second collection cylinder (47). The first discharge branch pipe (44) and the second discharge branch pipe (45) are each provided with a discharge valve (48) for controlling opening and closing.
6. The gas-water heavy aromatics separation device according to claim 5, characterized in that, The feeding pipe (31) is set at an angle of 15°-30° along the feeding direction.
7. A separation method, comprising separating heavy aromatics using the heavy aromatics separation device for gas-water as described in claim 6, characterized in that, Includes the following steps: S1. Mix the heavy aromatic fluid with carbon disulfide at a mass ratio of 1:10, add the mixture into the filter cartridge, turn on the vacuum pump (14) to filter the mixture, and the filtered extract B enters the vacuum tube (12) from the filter cover (13). The vacuum pump (14) delivers the extract B to the centrifugal extraction assembly (2). The pore size of the filter cover (13) is 0.45μm. S2. Before the extractant B enters the drum (21) from the first inlet, the extractant B: petroleum ether: methanol are mixed in the first storage cylinder (211) at a mass ratio of 1:8:
4. The on / off valve (210) on the first feed branch pipe (28) is opened. The extractant B enters the drum (21) from the first inlet, and the mixture of petroleum ether and methanol enters the drum (21) from the second inlet for the first centrifugal extraction. The petroleum ether phase C extracted in the first extraction is discharged from the light phase outlet (26) as the light phase and stored. The methanol phase D and carbon disulfide phase E are discharged from the heavy phase outlet (25). At this time, the three-way valve (213) is adjusted to connect the heavy phase outlet (25) and the return pipe (214). The mixture of methanol phase D and carbon disulfide phase E enters the second storage cylinder (212). S3. After the first extraction is completed, close the on / off valve (210) on the first feed branch (28), open the on / off valve (210) on the second feed branch (29), and adjust the three-way valve (213) to connect the heavy phase outlet (25) and the feed end of the feed pipe (31). The mixture of methanol phase D and carbon disulfide phase E enters the drum (21) from the second inlet for centrifugal extraction again. Methanol phase D, as the light phase, is discharged from the light phase outlet (26) for storage. Carbon disulfide phase E, as the heavy phase, enters the feed pipe (31). The feed auger (32) sends carbon disulfide phase E into the chromatography assembly (4) for column chromatography. During the two extraction processes, the speed of the extraction motor is 3000 rpm and the separation factor of the drum in the drum (21) is 2000 g. S4. Before the carbon disulfide phase E enters the chromatography column (41), pre-dried 400-mesh silica gel is packed into the chromatography column (41) at a packing density of 0.45 g / cm³. 3 After the carbon disulfide phase E enters the chromatography column (41), petroleum ether is added through the feed pipe (42) on the first chromatography column (41) to elute the carbon disulfide phase E. At the same time, the discharge valve (48) on the first discharge branch pipe (44) located at the far end of the discharge main pipe (43) is opened to collect the eluted alkane compound F into the first collection cylinder (46). S5. When the alkane compound F discharged from the first discharge branch pipe (44) turns colorless, add petroleum ether and ethyl acetate in a mass ratio of 10:1 from the feed pipe (42) for elution again. When the colored eluent is discharged, close the discharge valve (48) on the first discharge branch pipe (44) and open the discharge valve (48) on the second discharge branch pipe (45) to collect the colored polycyclic aromatic hydrocarbon compound G. When the discharged eluent turns colorless, close the chromatography component (4) to complete the separation of heavy aromatic hydrocarbons.