A wastewater treatment system based on production of aromatic hydrocarbon oil

Abstract

The application discloses a kind of wastewater treatment systems based on aromatic oil production, including warehouse body, warehouse body side is equipped with air pump, warehouse body is sequentially arranged with liquid inlet area, bubble mixing area, floating area, separation zone and liquid discharge area from near to far relative to air pump, further include: first rolling component, it is set in floating area upper side, and it is equipped with multiple scrapers on it;Second rolling component, it is set in separation zone, and height is across liquid level in separation zone setting, and it is equipped with multiple trays on it.The application is driven by setting second rolling component tray in separation zone and across liquid level and rolls, so that the liquid flow that enters separation zone from floating area is cut off, and in the position close to the inner wall of separation zone, tray rolls downward, and the liquid flow that may impact the inner wall of separation zone near this position is driven downward, so it is not easy to occur backflow, thereby avoid the phenomenon that upper layer liquid flow of separation zone liquid level collides, improve the efficiency of separation zone introduction floating liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aromatic oil production, and particularly relates to a wastewater treatment system based on aromatic oil production. BACKGROUND

[0002] Aromatic oil is also called aromatic hydrocarbon or aromatic, which refers to a carbon hydrogen compound containing benzene ring structure in the molecule, and is one of basic products and basic raw materials in petroleum chemical industry, mainly including benzene, toluene and xylene, ethylbenzene, etc. The production of aromatic oil will produce harmful wastewater, which needs to be properly treated before being safely discharged. The existing wastewater treatment system basically meets the daily use requirements, but still has some deficiencies to be improved.

[0003] Patent document CN104556284A discloses a gas floatation machine on April 29, 2015, which comprises a floatation chamber, a contact chamber, a partition plate and a gas floatation port. The floatation chamber and the contact chamber are arranged adjacent to each other. The partition plate is arranged between the floatation chamber and the contact chamber for separating the floatation chamber and the contact chamber. The gas floatation port is arranged on the plane of the partition plate. The partition plate is bent towards the floatation chamber at one end close to the gas floatation port, and the number of bending is not less than one. The present application improves the original gas floatation machine, has simple structure, helps to speed up the gas floatation time, indirectly increases the operation load of the gas floatation machine, and greatly improves the water discharge effect.

[0004] In the prior art as described above, the gas floatation technology can effectively remove the light floating matter in the aromatic oil production wastewater, but the way of scraping the upper layer of the liquid surface drives the liquid-liquid separation, so that when the upper floating liquid enters the specified direction of the separation warehouse or the separation area, it will collide with the inner wall of the separation warehouse to produce backflow, and then collide with the subsequent floating liquid flow, which affects the separation efficiency. Therefore, there is an urgent need for a wastewater treatment system based on aromatic oil production to solve the above problems. SUMMARY

[0005] The present application provides a wastewater treatment system based on aromatic oil production to solve the above problems in the prior art.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] The application discloses a wastewater treatment system based on aromatic oil production, which comprises a warehouse body, a gas pump arranged on one side of the warehouse body, an inlet liquid area, a bubble mixing area, a floating area, a separation area and a liquid discharge area arranged in the warehouse body from near to far relative to the gas pump, and a first rolling assembly arranged on the upper side of the floating area and provided with a plurality of scrapers, wherein the lower end of the scraper continuously scrapes the uppermost layer of the liquid surface of the floating area to the separation area when passing through the lower side of the first rolling assembly; and a second rolling assembly arranged in the separation area and provided with a plurality of trays, wherein the trays roll upwards on the side close to the floating area and roll downwards on the side away from the floating area.

[0008] Preferably, the first rolling assembly comprises two first rolling shafts rotatably arranged at the upper end of the warehouse body, first sprockets coaxially connected to the two ends of each first rolling shaft, and a first chain connecting the two first sprockets of the two first rolling shafts, and the scraper is fixedly arranged on the first chain.

[0009] Preferably, the second rolling assembly comprises a second rolling shaft rotatably arranged in the separation area, second sprockets coaxially connected to the two ends of the second rolling shaft, a third sprocket connected to the second sprocket through a second chain, and the third sprocket is rotatably connected to the inner wall of the warehouse body and arranged above the liquid surface of the separation area, and the tray is fixedly arranged on the second chain.

[0010] Preferably, the tray is provided with an opening, and the opening faces upwards when the tray rolls upwards, and the bottom is provided with an inclined surface facing upwards and towards the floating area.

[0011] Preferably, one side of the tray facing the inner side of the rolling track is provided with a closable blocking assembly, and the blocking assembly only blocks the one side of the tray facing the inner side of the rolling track in the process of the tray rising and crossing the liquid surface of the separation area.

[0012] Preferably, the blocking assembly comprises a first baffle elastically connected to the tray, a second baffle hingedly connected to the free end of the first baffle, and the free end of the second baffle is movably connected to the tray, and the first baffle and the second baffle have a common plane in the movable range to form a first state in which the one side of the tray facing the inner side of the rolling track is closed and a second state in which the first baffle and the second baffle are folded into a V shape to form a second state in which the one side of the tray facing the inner side of the rolling track is opened.

[0013] Preferably, the free end of the second baffle is provided with a sliding pin, and the tray is provided with a sliding groove matched with the sliding pin.

[0014] Preferably, the inner wall of the separation area is provided with a guide plate vertically crossing the liquid surface in the separation area, and the rotating shaft of the first baffle penetrates the tray and is fixedly provided with a torsion block matched with the guide plate.

[0015] Preferably, the inner wall of the separation zone is provided with a separation port below the liquid surface and inside the rolling track of the tray.

[0016] Preferably, the tray is provided with a screen on the side facing the inside of the rolling track and corresponding to the opening and closing position of the blocking assembly.

[0017] In the above technical solution, the present application has the following advantages:

[0018] The wastewater treatment system based on aromatic oil production is provided with a second rolling assembly to drive the tray to roll across the liquid surface in the separation zone, so that the liquid flow entering the separation zone from the floating zone under the driving of the first rolling assembly and the scraper is cut off, and at the position close to the inner wall of the separation zone, the tray rolls downward, so that the liquid flow near the position that may impact the inner wall of the separation zone is driven downward, and backflow is not easy to occur, thereby avoiding the phenomenon of liquid flow impact on the upper layer of the liquid surface of the separation zone, and improving the efficiency of introducing the floating liquid into the separation zone.

[0019] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the present disclosure.

[0020] The present application file provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0022] Figure 1 The overall structure schematic diagram provided for the embodiments of the present application;

[0023] Figure 2 The side view cross-sectional structure schematic diagram provided for the embodiments of the present application;

[0024] Figure 3 The side view cross-sectional structure schematic diagram provided for the embodiments of the present application; Figure 2 The enlarged structure schematic diagram at A in FIG. 5;

[0025] Figure 4 The enlarged structure schematic diagram at B in FIG. 5; Figure 2 The enlarged structure schematic diagram at B in FIG. 5;

[0026] Figure 5 The arrangement schematic diagram of the tray provided for the embodiments of the present application.

[0027] Explanation of reference signs:

[0028] 1, warehouse body; 2, air pump; 3, scraper; 4, tray; 5, first roller; 6, first sprocket; 7, first chain; 8, second roller; 9, second sprocket; 10, second chain; 11, third sprocket; 12, first baffle; 13, second baffle; 14, sliding pin; 15, sliding groove; 16, guide plate; 17, torsion block; 18, separation port; 19, blocking net; 20, support; 21, spray pipe; 22, nozzle; 23, arc plate. DETAILED DESCRIPTION

[0029] To make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the scope of protection of the present disclosure.

[0030] Please refer to Figures 1-5 The embodiment of the present application provides a wastewater treatment system based on aromatic oil production, which comprises a warehouse body 1, one side of the warehouse body 1 is provided with an air pump 2, the warehouse body 1 is sequentially provided with a liquid inlet area, a bubble mixing area, a floating area, a separation area and a liquid outlet area from near to far relative to the air pump 2, and further comprises: a first rolling assembly arranged on the upper side of the floating area, a plurality of scrapers 3 are arranged on the first rolling assembly, and when the scraper 3 passes through the lower side of the first rolling assembly, the lower end of the scraper 3 continuously scrapes the uppermost layer of the liquid surface of the floating area to the separation area; a second rolling assembly arranged in the separation area and having a height across the liquid surface in the separation area, a plurality of trays 4 are arranged on the second rolling assembly, and the trays 4 are arranged to roll upward near the floating area and to roll downward away from the floating area.

[0031] Specifically, the bin body 1 is in a rectangular box shape, and the inside is separated into a liquid inlet area, a bubble mixing area, a floating area, a separation area and a liquid outlet area by fixed partitions; the liquid inlet area is used for inputting wastewater to be treated and adding PAC (polyaluminum chloride) and PAM (polyacrylamide) to better capture floating objects; the liquid inlet area and the bubble mixing area are connected through the bottom; a bubble generator such as a bubble nozzle is arranged at the bottom of the bubble mixing area, and a gas pump 2 is connected to the bubble generator through a conduit; the bubble mixing area and the floating area are connected through the top; the floating area is used to provide sufficient separation space for floating liquid and other liquids, and the floating liquid is kept near the liquid surface of the floating area; the floating area and the separation area are connected through the top, and the floating liquid at the liquid surface of the floating area flows from the position of the bubble mixing area to the position of the separation area; the separation area is used to concentrate the floating liquid, and other liquids flow from the floating area below the separation area to the liquid outlet area; a liquid outlet is arranged at a position corresponding to the liquid surface height in the liquid outlet area, and the separated other liquids flow to the next treatment process from the liquid outlet. The first rolling assembly is arranged transversely and above the liquid surface of the floating area, and covers the floating area transversely, and the rolling track below is parallel to the liquid surface of the floating area; when the scraper 3 passes below the first rolling assembly, the end of the scraper 3 is deep into the liquid surface of the floating area by a certain depth, so as to drive the floating liquid at the liquid surface of the floating area to flow in the driving direction; the second rolling assembly is arranged vertically, and a part is below the liquid surface of the separation area, and another part is above the liquid surface of the separation area; the tray 4 rolls upward near the floating area side, thereby cutting off the water flow, and the tray 4 rolls downward away from the floating area side, thereby driving the liquid flow near the inner wall of the separation area away from the floating area side downward; the first rolling assembly and the second rolling assembly can be driven by the same driving unit and controlled by a servo system. In actual use, the first rolling assembly and the second rolling assembly roll at the same time, wherein the first rolling assembly drives the scraper 3 to make the floating liquid on the upper layer of the liquid surface of the floating area flow to the separation area, and the floating liquid still flows on the liquid surface after entering the separation area, so as to be first intercepted by the upward rolling multiple trays 4, and at the position of the liquid flow near the inner wall of the separation area in the continuous flowing direction, the tray 4 rolls downward, so that the liquid flow near the position that may impact the inner wall of the separation area is driven downward, and backflow is not easy to occur, thereby avoiding the phenomenon of liquid flow collision on the upper layer of the liquid surface of the separation area, and improving the efficiency of introducing the floating liquid into the separation area.

[0032] Compared with the prior art, the wastewater treatment system based on aromatic oil production provided by the embodiment of the application drives the tray 4 to roll across the liquid surface in the separation area through the second rolling assembly, so that the liquid flow entering the separation area from the floating area under the driving of the first rolling assembly and the scraper 3 is intercepted, and at the position near the inner wall of the separation area, the tray 4 rolls downward, so that the liquid flow near the position that may impact the inner wall of the separation area is driven downward, and backflow is not easy to occur, thereby avoiding the phenomenon of liquid flow collision on the upper layer of the liquid surface of the separation area, and improving the efficiency of introducing the floating liquid into the separation area.

[0033] As the preferred technical scheme of the embodiment, the first rolling assembly comprises two first rollers 5 rotatably arranged at the upper end of the bin body 1, a first sprocket 6 coaxially connected to each end of the first roller 5, and a first chain 7 connecting the two first sprockets 6 on the two first rollers 5. The scraper 3 is fixedly arranged on the first chain 7. Specifically, the two first rollers 5 are respectively suspended above the floating area close to the bubble mixing area and above the separation area, and are supported and connected by the shaft seat arranged on the bin body 1. The two first sprockets 6 at one end of the two first rollers 5 in the same direction form a group and are connected to the same first chain 7. The scraper 3 is transversely arranged and connected outside the two first chains 7.

[0034] As the preferred technical scheme of the embodiment, the second rolling assembly comprises a second roller 8 rotatably arranged in the separation area, a second sprocket 9 coaxially connected to each end of the second roller 8, a third sprocket 11 connected to the second sprocket 9 through a second chain 10, and the third sprocket 11 rotatably connected to the inner wall of the bin body 1 and arranged above the liquid surface in the separation area. The tray 4 is fixedly arranged on the second chain 10. Specifically, the second roller 8 is arranged below the liquid surface in the separation area. The second sprocket 9 and the third sprocket 11 are arranged one above the other in a one-to-one correspondence. The tray 4 is parallel to the axial direction of the second roller 8 and is fixedly connected to the outside of the two second chains 10.

[0035] In another embodiment of the present application, the tray 4 is provided with an opening. When the tray 4 rolls upward, the opening faces upward, and the bottom is provided with an inclined surface facing upward and toward the floating area. Specifically, the opening and the bottom inclined surface of the tray 4 are arranged so that when the tray 4 moves upward on the side close to the floating area, the opening can obtain a part of the floating liquid rising, and after the opening exceeds the liquid surface, the bottom inclined surface of the tray 4 can guide the floating liquid continuously flowing into the separation area downward, thereby reducing the floating liquid continuously flowing to the inner wall of the separation area and optimizing the backflow phenomenon. In addition, after the tray 4 obtains the floating liquid rising out of the liquid surface of the separation area, the part of the floating liquid contacts with the air, so that the bubbles in the floating liquid accelerate to break, thereby reducing the density of the floating liquid, and then the subsequent floating liquid is more easily sunk in the separation area for discharge.

[0036] As a preferred technical scheme of the embodiment, the tray 4 is provided with a closable blocking assembly on the side facing the inner side of the rolling track. The blocking assembly only blocks the side of the tray 4 facing the inner side of the rolling track during the tray 4 rising and passing through the liquid surface of the separation area. Specifically, the blocking assembly controls the bottom of the tray 4 to be closed during the rising of the tray 4, so as to prevent the floating liquid obtained by the tray 4 from directly leaking out when the tray 4 rises and passes through the liquid surface. After the tray 4 rises and leaves the liquid surface by a certain height, the blocking assembly stops the blocking, so that the floating liquid obtained by the tray 4 is discharged outward and downward. At this time, the discharged floating liquid falls into the separation area and acts on the liquid surface of the corresponding separation area below, so as to make the range of the liquid surface in the separation area far from the floating area have a greater downward flow trend, and the guiding effect of the inclined surface of the bottom of the tray 4 is combined with each other, so as to accelerate the downward flow and sinking of the floating liquid introduced into the separation area, and promote the smooth discharge of the separated floating material.

[0037] As a preferred technical scheme of the embodiment, the blocking assembly includes a first baffle 12 elastically connected to the tray 4, a second baffle 13 connected to the free end of the first baffle 12, and the free end of the second baffle 13 movably connected to the tray 4. The first baffle 12 and the second baffle 13 have a coplanar first state in which the side of the tray 4 facing the inner side of the rolling track is closed, and a second state in which the first baffle 12 and the second baffle 13 are folded into a V shape so that the side of the tray 4 facing the inner side of the rolling track is opened. Specifically, the rotating shaft of the first baffle 12 is connected to the position of the tray 4 through a torsion spring, and the elastic rotation of the first baffle 12 makes the first baffle 12 and the second baffle 13 remain in the second state without external force. The tray 4 is approximately triangular, one side is open, one side is inclined, and the other side is controlled to be opened and closed by the blocking assembly. In the first state of the first baffle 12 and the second baffle 13, the first baffle 12 and the second baffle 13 are coplanar and attached to the side of the tray 4 facing the inner side of the rolling track, so that only the open side of the tray 4 is open, and liquid leakage does not occur during the rising of the tray 4. In the second state of the first baffle 12 and the second baffle 13, the free end of the first baffle 12 rotates to the inner side of the rolling track of the tray 4, and drives the second baffle 13 to rotate and rise. At this time, the hinged end of the first baffle 12 and the second baffle 13 protrudes to the inner side of the rolling track of the tray 4, so that the side of the tray 4 facing the inner side of the rolling track is not completely blocked. The switching between the first state and the second state of the first baffle 12 and the second baffle 13 is realized by the rotation of the first baffle 12 and the linkage of the rotation and movement of the second baffle 13.

[0038] As a preferred technical solution of the embodiment, the free end of the second baffle 13 is provided with a sliding pin 14, and the tray 4 is provided with a sliding groove 15 matched with the sliding pin 14. Specifically, the sliding pin 14 and the sliding groove 15 limit the free end of the second baffle 13 from moving away from the tray 4 to the side of the rolling track of the tray 4, and meet the activity needs of switching between the two states of the first baffle 12 and the second baffle 13.

[0039] As a preferred technical solution of the embodiment, the inner wall of the separation zone is provided with a guide plate 16 vertically across the liquid surface in the separation zone. The rotating shaft of the first baffle 12 penetrates the tray 4 and is fixedly provided with a torsion block 17 matched with the guide plate 16. Specifically, the guide plate 16 is arranged on the side of the second chain 10 close to the floating zone, and is arranged in a spaced manner with the second chain 10. The lower end of the guide plate 16 is inclined towards the floating zone, and the spacing between the lowermost end and the second chain 10 meets the requirement of the torsion block 17 entering. The torsion block 17 rotates with the rotating shaft of the first baffle 12. When the first baffle 12 is in a free state, i.e. the first baffle 12 and the second baffle 13 are in a second state, the torsion block 17 is tilted towards the direction away from the rolling track of the tray 4. When the tray 4 is in the ascending stroke, the torsion block 17 is tilted upwards and towards the floating zone. When the tray 4 rises to a height range above the liquid surface of the separation zone, the torsion block 17 can abut against the guide plate 16, so that the torsion block 17 is forced to rotate upwards, thereby driving the free end of the first baffle 12 to rotate towards the inner side of the tray 4, so as to realize the switching of the first baffle 12 and the second baffle 13 from the second state to the first state. After the tray 4 rises above the liquid surface of the separation zone by a certain height, the torsion block 17 is separated from the guide plate 16, so that the first baffle 12 can be elastically rotated to recover, i.e. the first baffle 12 and the second baffle 13 are switched from the first state to the second state.

[0040] As a preferred technical solution of the embodiment, the inner wall of the separation zone is provided with a separation port 18 below the liquid surface and inside the rolling track of the tray 4. Specifically, the separation port 18 at this position just corresponds to the guide of the inclined surface at the bottom of the tray 4 and the water flow path in the separation zone generated by the combined action of the tray 4 lifting the floating liquid and then discharging it downwards, which promotes the smooth and rapid separation of the floating objects and discharges them outward.

[0041] In still another embodiment of the present application, the tray 4 is provided with a screen 19 on the side facing the inside of the rolling track and corresponding to the opening and closing position of the blocking assembly. Specifically, the screen 19 can block large floating particles, but not small floating particles. Large floating particles are prone to form sludge, and subsequent solid-liquid separation is required. The screen 19 can filter the floating liquid collected by the tray 4 when it is discharged, so as to avoid re-mixing in the separation area. Further, the spray pipe 21 is fixedly arranged on the upper end of the bin body 1 through the support 20, and the third sprocket 11 is rotatably arranged on the spray pipe 21. The upper part of the liquid discharge area in the bin body 1 is provided with a collection area for collecting sludge, and the spray pipe 21 is uniformly provided with a plurality of nozzles 22 spraying towards the collection area. When the tray 4 passes through the water flow path sprayed by the nozzles 22, the screen 19 is washed to discharge the adhered sludge into the collection area, and the tray 4 is provided with an arc-shaped plate 23 for guiding the sludge. In actual use, after the tray 4 filters the floating liquid, the screen 19 adheres sludge. Then, when the screen 19 rolls above the third sprocket 11 to change direction and starts to descend, the blocking assembly remains open. Therefore, the screen 19 will pass through the water flow path sprayed by the nozzles 22, and the screen 19 will be washed to drop the adhered sludge onto the arc-shaped plate 23. Under the action of the water flow, the sludge is discharged above the collection area along the arc-shaped plate 23 and enters the collection area.

[0042] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A wastewater treatment system based on aromatic oil production, comprising a tank (1), an air pump (2) disposed on one side of the tank (1), and, within the tank (1), arranged sequentially from near to far from the air pump (2), an inlet zone, a bubble mixing zone, a flotation zone, a separation zone, and a discharge zone, characterized in that, Also includes: The first rolling component is set on the upper side of the floating zone, and multiple scrapers (3) are set on it. When the scrapers (3) pass the lower side of the first rolling component, the lower end of the scrapers (3) continuously scrapes the uppermost layer of the floating zone liquid surface in the direction of the separation zone. The second rolling assembly is set in the separation zone and its height spans the liquid surface in the separation zone. Multiple trays (4) are set on it. The trays (4) roll upward on the side close to the floating zone and roll downward on the side away from the floating zone. The second rolling assembly includes a second roller (8) rotatably disposed in the separation zone. Both ends of the second roller (8) are coaxially connected to a second sprocket (9). The second sprocket (9) is connected to a third sprocket (11) via a second chain (10). The third sprocket (11) is rotatably connected to the inner wall of the tank body (1) and is disposed above the liquid surface in the separation zone. The tray (4) is fixedly disposed on the second chain (10). The tray (4) is provided with an opening, which faces upward when the tray (4) rolls upward, and the bottom is provided with an upward-facing slope towards the floating area; The tray (4) is provided with an openable sealing component on the side facing the inside of the rolling track. The sealing component only blocks the side of the tray (4) facing the inside of the rolling track during the process of the tray (4) rising and crossing the liquid surface of the separation zone. The sealing assembly includes a first baffle (12) that is elastically hinged on the tray (4), a second baffle (13) that is hinged to the free end of the first baffle (12), and the free end of the second baffle (13) that is movably connected to the tray (4). The first baffle (12) and the second baffle (13) are coplanar in the range of motion, so that the tray (4) is closed on the side facing the inside of the rolling track, and a second state that is folded into a V-shape so that the tray (4) is open on the side facing the inside of the rolling track. The free end of the second baffle (13) is provided with a sliding pin (14), and the tray (4) is provided with a sliding groove (15) that matches the sliding pin (14). The inner wall of the separation zone is provided with a guide plate (16) that spans the liquid surface inside. The rotating shaft of the first baffle (12) rotates through the tray (4) and is fixedly provided with a torsion block (17) that matches the guide plate (16).

2. The wastewater treatment system based on aromatic oil production according to claim 1, characterized in that, The first rolling assembly includes two first rollers (5) rotatably mounted on the upper end of the housing (1). Both ends of the first rollers (5) are coaxially connected to first sprockets (6). The two first sprockets (6) on the two first rollers (5) are connected by a first chain (7). The scraper (3) is fixedly mounted on the first chain (7).

3. The wastewater treatment system based on aromatic oil production according to claim 1, characterized in that, The inner wall of the separation zone is provided with a separation port (18) that is below the liquid surface and inside the rolling trajectory of the tray (4).

4. The wastewater treatment system based on aromatic oil production according to claim 1, characterized in that, The tray (4) is provided with a baffle (19) facing the inner side of the rolling track and corresponding to the opening and closing position of the sealing component.

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