CN114634256A - Coalescence-separation device and separation method for treating oily sewage - Google Patents
Coalescence-separation device and separation method for treating oily sewage Download PDFInfo
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- CN114634256A CN114634256A CN202210355148.1A CN202210355148A CN114634256A CN 114634256 A CN114634256 A CN 114634256A CN 202210355148 A CN202210355148 A CN 202210355148A CN 114634256 A CN114634256 A CN 114634256A
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- 238000000926 separation method Methods 0.000 title claims abstract description 66
- 239000010865 sewage Substances 0.000 title claims abstract description 27
- 238000005273 aeration Methods 0.000 claims abstract description 65
- 238000012856 packing Methods 0.000 claims abstract description 44
- 239000000945 filler Substances 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 238000005191 phase separation Methods 0.000 claims abstract description 18
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 8
- 239000012071 phase Substances 0.000 claims description 52
- 230000005540 biological transmission Effects 0.000 claims description 31
- 238000009826 distribution Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 15
- 239000007791 liquid phase Substances 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 9
- -1 polypropylene Polymers 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 8
- 238000004581 coalescence Methods 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 2
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- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
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- 238000000034 method Methods 0.000 description 11
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- 238000005516 engineering process Methods 0.000 description 6
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- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a coalescence-separation device and a separation method for treating oily sewage, wherein the coalescence-separation device comprises: the main shell is internally divided into an inlet rectifying area, a plate type packing area, a fiber packing area, a heavy phase settling area and a light phase separation area from left to right in sequence; be located be equipped with centrifugal rectification component in the main casing body in entry rectification district, be located the main casing internal corrugated plate support in board-like filler district, be located the main casing internal of fibre filler district and be equipped with in proper order by a left side to the right side and enclose oleophylic hydrophobic packing layer, the oleophobic packing layer of hydrophile that keeps off through the packing baffle, be located the main internal aeration equipment who is used for the aeration that is equipped with of main casing in heavy phase settlement district. The device has the advantages of simple operation and maintenance, high integration level, no secondary pollution, simple operation and maintenance, high comprehensive efficiency of the system and excellent separation effect on the dispersed oil and the non-surfactant emulsified oil.
Description
Technical Field
The invention relates to the technical field of oily sewage separation treatment, in particular to a coalescence-separation device and a coalescence-separation method for treating oily sewage.
Background
Generally, oil is mainly distributed in five states of floatable oil, dispersed oil, emulsified oil, dissolved oil and solid attached oil in water, and a coalescence method has the advantages of no need of additional chemical reagents, no secondary pollution, high efficiency and large treatment capacity when treating the dispersed oil and the non-surfactant emulsified oil, and simultaneously, oil drops are coalesced and enlarged to meet the requirement of earlier water outlet.
The coalescence-separation is used as the pretreatment of oil-water separation in the processes of petroleum exploitation and chemical production, and is widely applied inside and outside the industry, and the traditional single oil-water separation technology is as follows: the centrifugal method, the gravity separation method, the air flotation method, the membrane separation method, the electric flocculation method and the agglomeration method (coarse granulation method) have respective advantages, disadvantages and application range.
Along with the characteristics of complex components, concentration fluctuation, variable flow and the like of the treated oily sewage, the single technology has limitation, so that the system has poor stability and can not meet the requirement of water outlet; therefore, in actual treatment, a plurality of technologies are commonly used, and a plurality of separation technologies are integrated in one set of equipment, so that the synergistic effect of the combined process is exerted to a greater extent, and the requirement of high-quality production is met.
Disclosure of Invention
Aiming at the defects of the prior art, complex and variable components for treating the oily sewage and improvement of treatment requirements, the invention aims to provide a coalescence-separation device and a separation method for treating the oily sewage, which highly integrate multiple separation technologies such as gravity settling separation, coalescence-separation, air floatation, filtration and the like into one set of equipment, reduce the floor area of the equipment, overcome the defects of a single separation technology and play the synergistic effect of a coupling process to a greater extent.
The technical scheme of the invention is as follows: a coalescing separation apparatus for treating oil-contaminated water, comprising: the top of the main shell is provided with a detachable cover plate, and the main shell is internally divided into an inlet rectifying area, a plate type packing area, a fiber packing area, a heavy phase settling area and a light phase separating area from left to right in turn;
a baffle plate is arranged between the inlet rectifying area and the plate type packing area, a weir plate is arranged between the plate type packing area and the fiber packing area, and an oil separation plate is arranged between the heavy phase settling area and the light phase separation area;
a centrifugal rectifying component is arranged in the main shell positioned in the inlet rectifying area, the side wall of the main shell is provided with a liquid inlet to be separated and connected with the centrifugal rectifying component,
a corrugated plate support is arranged in the main shell positioned in the plate type packing area, two ends of the corrugated plate support are correspondingly connected with the baffle plate and the weir plate, a sludge discharge port is arranged at the bottom of the main shell positioned in the plate type packing area,
an oleophylic hydrophobic filler layer and a hydrophilic oleophobic filler layer which are enclosed and blocked by a filler partition plate are sequentially arranged from left to right in the main shell positioned in the fiber filler area,
an aeration device for aeration is arranged in the main shell positioned in the heavy phase settling zone, a detachable cover plate positioned in the heavy phase settling zone is provided with an exhaust port, the bottom of the main shell positioned in the heavy phase settling zone is provided with a heavy phase outlet,
the side wall of the main shell body positioned in the light phase separation area is provided with an oil discharge port, and the bottom of the main shell body positioned in the light phase separation area is provided with a light phase outlet.
Further, coalescence-separation device is horizontal square structure, can dismantle the apron all fixed with the main casing body with the bolt all around, through dismantling apron detachable design, be convenient for carry out inside inspection and maintenance to coalescence-separation device.
Furthermore, the centrifugal inlet component is cylindrical, the centrifugal inlet component is tangent to the liquid inlet to be separated, certain spaces are reserved between the centrifugal inlet component and the inner top surface and the inner bottom surface of the main shell, and the centrifugal inlet component is tangent to the liquid inlet to be separated and reserves certain spaces, so that the efficiency of processing the fluid in a laminar state by the centrifugal inlet component can be improved.
Further, the buckled plate support is field word check type, the packing in board-like filler district is the slant buckled plate, there are crest and trough on the slant buckled plate, specifically be ceramic buckled plate or stainless steel buckled plate, adopt above-mentioned design can improve the gravity settling separation effect of oily waste water.
Furthermore, the shape of the weir plate is a zigzag effluent weir, a certain space is reserved between the weir plate and the top in the main shell, and the oily wastewater flows to the fiber filler area from the upper part of the weir plate for subsequent treatment by reserving the certain space.
Furthermore, the filler partition plate is of a pore plate type structure with uniform pore size and uniform distribution; the filler in the oleophylic and hydrophobic filler layer is polypropylene fiber, polytetrafluoroethylene fiber or polyester fiber, and the filler in the hydrophilic and oleophobic filler layer is polypropylene fiber.
Furthermore, the bottom of the main shell body positioned in the plate type packing area and the heavy phase settling area is provided with a mud storage area and a heavy phase storage area, and the mud storage area and the heavy phase storage area are both designed into W-shaped areas.
Furthermore, an oil skimming pipe is arranged at the oil outlet, and the oil skimming pipe and the oil baffle plate are at the same height; and a transparent liquid level window is arranged beside the oil discharge port, so that the observation in the light phase separation area is facilitated.
As an alternative of the invention, the aeration device is erected on a heavy phase storage area of the heavy phase settling area,
the aeration device comprises an aeration bracket, one side of the aeration bracket is provided with an air distribution pipe for guiding air, the aeration bracket is provided with a plurality of groups of aeration pipes which are communicated with the air distribution pipe, each aeration pipe is sleeved with a blockage removal sleeve for preventing the blockage of an aeration hole,
each blockage removing sleeve is connected through a transmission bracket, the transmission bracket is connected with a transmission mechanism on the gas distribution pipe through a connecting rod, the transmission bracket is rotationally connected with the connecting rod through a rotating shaft,
the transmission mechanism comprises two groups of fan blades arranged in pipe orifices at two ends of the air distribution pipe, transmission gears positioned on the outer walls of the pipe orifices at the two ends of the air distribution pipe and driven gears respectively engaged with the corresponding transmission gears in a transmission way, a screw rod is connected between the two groups of driven gears, a nut is arranged on the screw rod, a rotatable sliding sleeve is arranged on the nut, the sliding sleeve is connected with the air distribution pipe in a sliding way, the sliding sleeve is rotationally connected with the connecting rod through a rotating shaft,
the outer walls of pipe orifices at two ends of the gas distribution pipe are respectively provided with an air inlet connected with the gas inlet pipe, and the two groups of gas inlet pipes are connected with the air pump through a two-way valve for controlling the gas inlet direction;
through above-mentioned aeration equipment's structure setting, can guarantee handling oily waste water in-process, avoid taking place the aeration pipe because of heavier liquid phase deposit on the aeration pipe and block up, drive power through utilizing the injection gas effect, ventilate in turn to two sets of intake pipes to utilize actuating mechanism and connecting rod to carry out transmission support and clear sheathed tube drive of blocking up, thereby make the aeration pipe clear stifled operation at any time, thereby avoid blockking up the aeration efficiency that influences aeration equipment because of the aeration pipe.
As another alternative of the invention, the aeration device is a commercially available aeration pipe.
The invention also provides a separation method for treating oily sewage by using the coalescence-separation device, which comprises the following steps:
s101, leading the oily sewage to enter a centrifugal rectifying member from a liquid inlet to be separated along the flowing direction from left to right in the coalescence-separation device to obtain laminar flow state fluid,
s102, then entering a plate type packing area for gravity settling separation, then overflowing from a serrated weir plate to enter a fiber packing area for coalescence, demulsification and separation,
s103, immediately entering a heavy phase settling area, discharging a heavier liquid phase at the bottom of the heavy phase settling area, and discharging an oil phase and a lighter liquid phase through a light phase separation area.
The invention has the beneficial effects that:
(1) the coalescence-separation device has the advantages of simple operation and maintenance, high integration level, no secondary pollution, simple operation and maintenance, high comprehensive efficiency of the system and excellent separation effect on the dispersed oil and the non-surfactant emulsified oil.
(2) The coalescence-separation device of the invention sequentially distributes an inlet rectifying area, a plate-type packing area, a fiber packing area, a heavy phase settling area and a light phase separation area along the preset direction in the space, oil drops of oily sewage are coalesced and enlarged under the actions of gravity settling, fiber demulsification coalescence and air flotation, and are separated from a liquid phase, thus the coalescence-separation device can be used for treating different types of oily sewage (heavy oil and light oil).
(3) The aeration device can effectively ensure that the aeration pipe is prevented from being blocked due to the deposition of a heavier liquid phase on the aeration pipe in the process of treating the oily wastewater, and the aeration pipe can be cleaned at any time by utilizing the driving force of the action of injected gas, so that the aeration efficiency of the aeration device is prevented from being influenced by the blockage of the aeration pipe.
(4) The separation method for treating the oily sewage utilizes the coalescence-separation device to effectively treat the oily sewage, has high comprehensive efficiency of the system, and has excellent separation effect on dispersed oil and non-surfactant emulsified oil.
Drawings
FIG. 1 is a schematic view of the overall construction of a coalescence-separation apparatus according to the invention;
FIG. 2 is a schematic view of the structure of an aeration apparatus according to the present invention;
wherein, 1-an inlet of a liquid to be separated; 2-a centrifugal inlet member; 3-inlet rectifying section; 4-a baffle plate; 5-corrugated plate support; 6-a sludge discharge port; 7-a weir plate; 8-a filler spacer; 9-oleophylic and hydrophobic filler layer; 10-hydrophilic oleophobic packing layer; 11-a heavy phase outlet; 12-an aeration device, 121-an aeration bracket, 122-an air distribution pipe, 123-an aeration pipe, 124-a blockage removal sleeve, 125-a transmission bracket, 126-a connecting rod and 127-an air inlet; 13-an exhaust port; 14-heavy phase settling zone; 15-light phase outlet; 16-oil drain port; 17-a light phase separation zone; 18-a main housing; 19-a plate packing zone; 20-a fibrous filler zone; 21-a removable cover plate; 22-oil baffle; 23-transmission mechanism, 231-fan blade, 232-transmission gear, 233-driven gear, 234-screw rod, 235-nut and 236-sliding sleeve.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments thereof for better understanding the advantages of the invention.
Example 1
As shown in fig. 1, a coalescing and separating device for treating oily sewage, which is a horizontal square structure, comprises: the top of the main shell 18 is provided with a detachable cover plate 21, the periphery of the detachable cover plate 21 is fixed with the main shell 18 through bolts, and the internal inspection and maintenance of the coalescence-separation device are facilitated through the detachable design of the detachable cover plate 21; the main shell 18 is internally divided into an inlet rectifying area 3, a plate type packing area 19, a fiber packing area 20, a heavy phase settling area 14 and a light phase separation area 17 from left to right in sequence;
as shown in fig. 1, a baffle 4 is arranged between the inlet rectifying section 3 and the plate type packing section 19, a weir plate 7 is arranged between the plate type packing section 19 and the fiber packing section 20, and an oil separation plate 22 is arranged between the heavy phase settling section 14 and the light phase separating section 17;
as shown in fig. 1, a centrifugal flow straightening member 2 is arranged in a main casing 18 located in the inlet flow straightening region 3, an inlet 1 for liquid to be separated is arranged on a side wall of the main casing 18 and connected with the centrifugal flow straightening member 2, the centrifugal flow straightening member 2 is cylindrical, the centrifugal flow straightening member 2 is tangent to the inlet 1 for liquid to be separated, a certain space is reserved between the centrifugal flow straightening member 2 and the inner top surface and the inner bottom surface of the main casing 18, and the centrifugal flow straightening member 2 is tangent to the inlet 1 for liquid to be separated and a certain space is reserved, so that the efficiency of processing the centrifugal flow straightening member 2 to obtain fluid in a laminar state can be improved;
as shown in fig. 1, a corrugated plate support 5 is arranged in a main casing 18 located in a plate-type packing area 19, two ends of the corrugated plate support 5 are correspondingly connected with a baffle 4 and a weir plate 7, a sludge discharge port 6 is arranged at the bottom of the main casing 18 located in the plate-type packing area 19, the corrugated plate support 5 is in a grid shape, packing of the plate-type packing area 19 is an oblique corrugated plate, the oblique corrugated plate is provided with wave crests and wave troughs, and particularly is a ceramic corrugated plate, and the gravity settling separation effect of oily wastewater can be improved by adopting the design; the shape of the weir plate 7 is a zigzag effluent weir, a certain space is reserved between the weir plate 7 and the top of the main shell 18, and the oil-containing wastewater flows to the fiber filler area 20 from the upper part of the weir plate 7 for subsequent treatment by reserving the certain space;
as shown in fig. 1, an oleophylic hydrophobic filler layer 9 and a hydrophilic oleophobic filler layer 10 which are enclosed and blocked by a filler partition plate 8 are sequentially arranged from left to right in a main shell 18 located in a fiber filler area 20, wherein the filler partition plate 8 is of a perforated plate type structure with uniformly distributed holes and consistent size; the filler in the oleophylic and hydrophobic filler layer 9 is polypropylene fiber, and the filler in the hydrophilic and oleophobic filler layer 10 is polypropylene fiber, so that the coalescence, demulsification and separation effects of the fiber filler region 20 can be improved;
as shown in fig. 1, an aeration device 12 for aeration is arranged in a main shell 18 positioned in a heavy phase settling zone 14, a detachable cover plate 21 positioned in the heavy phase settling zone 14 is provided with an exhaust port 13, a heavy phase outlet 11 is arranged at the bottom of the main shell 18 positioned in the heavy phase settling zone 14, and the aeration device 12 is a commercially available aeration pipe;
as shown in fig. 1, an oil discharge port 16 is arranged on the side wall of the main shell 18 positioned in the light phase separation zone 17, a light phase outlet 15 is arranged at the bottom of the main shell 18 positioned in the light phase separation zone 17, an oil skimming pipe is arranged at the oil discharge port 16, and the oil skimming pipe and the oil baffle plate 22 are at the same height; a transparent liquid level window is arranged beside the oil discharge port 16, so that the observation in the light phase separation zone 17 is facilitated;
as shown in fig. 1, a mud storage area and a heavy phase storage area are arranged at the bottom of the main shell 18 located in the plate-type packing area 19 and the heavy phase settling area 14, and both the mud storage area and the heavy phase storage area are designed into W shapes.
Example 2
The present embodiment is substantially the same as embodiment 1, except that, as shown in fig. 2, the aeration device 12 is erected on the heavy phase storage area of the heavy phase settling area 14, the aeration device 12 includes an aeration support 121, an air distribution pipe 122 for guiding air is disposed on one side of the aeration support 121, eight groups of aeration pipes 123 are disposed on the aeration support 121 and are communicated with the air distribution pipe 122, and each aeration pipe 123 is sleeved with a blockage removal sleeve 124 for preventing blockage of an aeration hole, each blockage removal sleeve 124 is connected through a transmission support 125, the transmission support 125 is connected with a transmission mechanism 23 on the air distribution pipe 122 through a connecting rod 126, the transmission support 125 is rotatably connected with the connecting rod 126 through a rotating shaft, the transmission mechanism 23 includes two groups of blades 231 disposed in pipe orifices at two ends of the air distribution pipe 122, and transmission gears 232 disposed on outer walls of pipe orifices at two ends of the air distribution pipe 122, the air distribution pipe comprises driven gears 233 which are respectively engaged with corresponding transmission gears 232 in a transmission manner, a screw rod 234 is connected between two groups of the driven gears 233, a nut 235 is arranged on the screw rod 234, a rotatable sliding sleeve 236 is arranged on the nut 235, the sliding sleeve 236 is connected with an air distribution pipe 122 in a sliding manner, the sliding sleeve 236 is rotatably connected with a connecting rod 126 through a rotating shaft, air inlets 127 connected with air inlet pipes are respectively arranged on the outer walls of pipe orifices at two ends of the air distribution pipe 122, and the two groups of the air inlet pipes are connected with an air pump through a two-way valve used for controlling the air inlet direction;
through the structural arrangement of the aeration device 12, the blockage of the aeration pipe 123 caused by the deposition of a heavier liquid phase on the aeration pipe 123 can be avoided in the process of treating the oily wastewater, the two groups of air inlet pipes are alternatively ventilated by utilizing the action of the injected gas as driving force, so that the driving mechanism 23 and the connecting rod 126 are utilized to drive the transmission bracket 125 and the blockage removing sleeve 124, the blockage removing operation of the aeration pipe 123 can be carried out at any time, and the influence on the aeration efficiency of the aeration device caused by the blockage of the aeration pipe 123 can be avoided;
the working principle of the aeration device 12 is as follows:
starting the air pump to inject air into the air inlet 127 on one side of the air distribution pipe 122, driving the fan blade 231 corresponding to the side air inlet 127 to rotate under the pushing of air flow, so as to drive the transmission gear 232 corresponding to the side air inlet 127 to rotate under the rotation of the fan blade 231, driving the driven gear 233 to drive the screw rod 234 to rotate under the meshing transmission of the transmission gear 232 and the driven gear 233, and driving each blockage removal sleeve 124 to slide on the aeration pipe 123 through the transmission bracket 125 under the linkage of the connecting rod 126 by matching the sliding sleeve 236 of the screw rod 235 with the sliding connection of the air distribution pipe 122 so as to move the screw rod 235 along the screw rod 234, thereby scraping deposits on the surface of the aeration pipe 123;
the time for moving the nut 235 to one side of the screw 234 under the driving of the ventilation capacity of the one-side air inlet 127 is used as the time for setting the alternate opening of the two-way valve on one side, so that when the nut 235 moves to one side of the screw 234, the two-way valve is switched to the other-side air inlet 127 for air injection, and because the inclination angles of the blades 231 are opposite, the blades 231 corresponding to the one-side air inlet 127 are reversely rotated during air injection, so that the nut 231 moves to the other side of the screw 234, and the reciprocating motion is carried out to enable each blockage removing sleeve 124 to reciprocate on the aeration pipe 123 for blockage removing treatment.
Example 3
This example is substantially the same as example 1, except that the above-described coalescence-separation apparatus is used for a separation method for treating oily sewage, and includes the steps of:
s101, leading the oily sewage to enter a centrifugal rectifying member 2 from a liquid inlet 1 to be separated along the flowing direction from left to right in the coalescence-separation device to obtain laminar flow state fluid,
s102, then entering a plate type packing area 19 for gravity settling separation, then overflowing from a serrated weir plate 7 to enter a fiber packing area 20 for coalescence, demulsification and separation,
s103, the oil phase enters the heavy phase settling zone 14, the heavier liquid phase is discharged from the bottom of the heavy phase settling zone 14, and the oil phase and the lighter liquid phase are discharged through the light phase separation zone 17.
Claims (10)
1. A coalescence-separation apparatus for treating oily sewage, comprising: the device comprises a main shell (18), wherein a detachable cover plate (21) is arranged at the top of the main shell (18), and the main shell (18) is internally divided into an inlet rectifying area (3), a plate type packing area (19), a fiber packing area (20), a heavy phase settling area (14) and a light phase separation area (17) from left to right;
a baffle (4) is arranged between the inlet rectifying area (3) and the plate type packing area (19), a weir plate (7) is arranged between the plate type packing area (19) and the fiber packing area (20), and an oil separation plate (22) is arranged between the heavy phase settling area (14) and the light phase separation area (17);
a centrifugal rectifying component (2) is arranged in a main shell (18) of the inlet rectifying area (3), the side wall of the main shell (18) is provided with an inlet (1) for liquid to be separated and connected with the centrifugal rectifying component (2),
a corrugated plate support (5) is arranged in the main shell (18) of the plate type packing area (19), two ends of the corrugated plate support (5) are correspondingly connected with the baffle plate (4) and the weir plate (7), a sludge discharge port (6) is arranged at the bottom of the main shell (18) of the plate type packing area (19),
an oleophylic hydrophobic filler layer (9) and a hydrophilic oleophobic filler layer (10) which are enclosed and blocked by a filler baffle (8) are sequentially arranged from left to right in a main shell (18) positioned in a fiber filler area (20),
an aeration device (12) for aeration is arranged in the main shell (18) positioned in the heavy phase settling area (14), an exhaust port (13) is arranged on a detachable cover plate (21) positioned in the heavy phase settling area (14), a heavy phase outlet (11) is arranged at the bottom of the main shell (18) positioned in the heavy phase settling area (14),
an oil discharge port (16) is arranged on the side wall of the main shell (18) positioned in the light phase separation area (17), and a light phase outlet (15) is arranged at the bottom of the main shell (18) positioned in the light phase separation area (17).
2. The coalescence-separation device for treating oily sewage according to claim 1, wherein the coalescence-separation device is of a horizontal square structure, and the periphery of the detachable cover plate (21) is fixed with the main shell (18) by bolts.
3. A coalescence-separation apparatus for treating oily sewage according to claim 1, wherein the centrifugal inlet member (2) is cylindrical, the centrifugal inlet member (2) is tangential to the liquid inlet (1) to be separated, and a space is reserved between the centrifugal inlet member (2) and the inner top and bottom surfaces of the main casing (18).
4. A coalescence-separation device according to claim 1, wherein the corrugated plate holder (5) is of a grid type, and the packing of the plate-type packing region (19) is an oblique corrugated plate having peaks and valleys, in particular a ceramic corrugated plate or a stainless steel corrugated plate.
5. A coalescence-separation apparatus for treating oily sewage according to claim 1, wherein the weir plate (7) is in the form of a serrated effluent weir, and the weir plate (7) is spaced from the top of the interior of the main casing (18).
6. A coalescence-separation device for treating oily sewage according to claim 1, wherein the filler partition (8) is a perforated plate type structure with uniformly distributed holes and uniform sizes; the filler in the oleophylic and hydrophobic filler layer (9) is polypropylene fiber, polytetrafluoroethylene fiber or polyester fiber, the filler in the hydrophilic and oleophobic filler layer (10) is polypropylene fiber, and the filler in the plate-type filler area (19) is a ceramic corrugated plate or a stainless steel corrugated plate.
7. A coalescence-separation apparatus for treating oily sewage according to claim 1, wherein a sludge storage area and a heavy phase storage area are provided at the bottom of the main casing (18) in the plate-type packing area (19) and the heavy phase settling area (14), and both the sludge storage area and the heavy phase storage area are designed in a W shape.
8. A coalescence-separation apparatus for treating oily sewage according to claim 1, wherein the aeration apparatus (12) is installed in a heavy-phase storage region of the heavy-phase settling zone (14),
the aeration device (12) comprises an aeration support (121), an air distribution pipe (122) for guiding air is arranged on one side of the aeration support (121), a plurality of groups of aeration pipes (123) are arranged on the aeration support (121) and communicated with the air distribution pipe (122), a blockage cleaning sleeve (124) for preventing blockage of aeration holes is sleeved on each aeration pipe (123),
each blockage removing sleeve (124) is connected through a transmission bracket (125), the transmission bracket (125) is connected with a transmission mechanism (23) on the gas distribution pipe (122) through a connecting rod (126), the transmission bracket (125) is rotatably connected with the connecting rod (126) through a rotating shaft,
the transmission mechanism (23) comprises two groups of fan blades (231) arranged in pipe orifices at two ends of the air distribution pipe (122), transmission gears (232) positioned on the outer walls of the pipe orifices at two ends of the air distribution pipe (122) and driven gears (233) respectively engaged with the corresponding transmission gears (232) in a transmission way, a screw rod (234) is connected between the two groups of driven gears (233), a nut (235) is arranged on the screw rod (234), a rotatable sliding sleeve (236) is arranged on the nut (235), the sliding sleeve (236) is connected with the air distribution pipe (122) in a sliding way, the sliding sleeve (236) is connected with the connecting rod (126) in a rotating way through a rotating shaft,
the outer walls of the pipe orifices at the two ends of the air distribution pipe (122) are respectively provided with an air inlet (127) connected with the air inlet pipe, and the two groups of air inlet pipes are connected with the air pump through a two-way valve for controlling the air inlet direction.
9. The coalescence-separation device for treating oily sewage according to claim 1, wherein an oil skimming pipe is installed at the oil discharge port (16) and is at the same height as the oil baffle plate (22); and a transparent liquid level window is arranged beside the oil drain port (16).
10. The separation method of a coalescence separation apparatus for treating oily sewage according to claims 1 to 9, characterized by comprising the steps of:
s101, leading the oily sewage to enter a centrifugal rectifying component (2) from a liquid inlet (1) to be separated along the flowing direction from left to right in the coalescence-separation device to obtain laminar flow state fluid,
s102, then the mixture enters a plate type packing area (19) for gravity settling separation, and then overflows from a serrated weir plate (7) to enter a fiber packing area (20) for coalescence, demulsification and separation,
s103, entering a heavy phase settling zone (14) immediately, discharging a heavier liquid phase at the bottom of the heavy phase settling zone (14), and discharging an oil phase and a lighter liquid phase through a light phase separation zone (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210355148.1A CN114634256A (en) | 2022-04-06 | 2022-04-06 | Coalescence-separation device and separation method for treating oily sewage |
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| CN202210355148.1A CN114634256A (en) | 2022-04-06 | 2022-04-06 | Coalescence-separation device and separation method for treating oily sewage |
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