CN112209530A - Oily wastewater treatment system - Google Patents

Oily wastewater treatment system Download PDF

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Publication number
CN112209530A
CN112209530A CN202011144158.8A CN202011144158A CN112209530A CN 112209530 A CN112209530 A CN 112209530A CN 202011144158 A CN202011144158 A CN 202011144158A CN 112209530 A CN112209530 A CN 112209530A
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filter
treatment system
water
baffle
wastewater treatment
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CN202011144158.8A
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Inventor
陈明翠
梁伦硕
盘章俊
姚海军
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Chongqing Neide Environmental Technology Co ltd
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Chongqing Neide Environmental Technology Co ltd
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Priority to CN202011144158.8A priority Critical patent/CN112209530A/en
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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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/004—Seals, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

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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 provides an oily wastewater treatment system, which comprises a wastewater pool, a three-phase separation device, a first filter, a coalescing filter, a mixer, a catalytic tower, a second filter and a clean water pool which are connected in sequence; the three-phase separation device is provided with a wastewater inlet position, a sludge discharge position, a clear water outlet position and a first oil recovery position, and comprises a first body, a second body and a connecting plate; the first body is communicated with the second body through the connecting plate; the wastewater inlet position is arranged on the side wall of the first body, the sludge discharge position is arranged at the bottom of the first body, the clear water outlet position is arranged on the side wall of the second body, and the first oil recovery position is arranged at the top of the second body; the dosing device is connected to the mixer; the dosing device is used for supplying an oxidant to the mixer. The invention solves the technical problems of low efficiency and high cost of the traditional oily wastewater treatment system by optimizing the oily wastewater treatment system.

Description

Oily wastewater treatment system
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an oily wastewater treatment system.
Background
The oily wastewater refers to wastewater containing high-concentration oil organic matters, which can cause serious pollution if directly discharged, can cause eutrophication of water bodies, and can cause the damage of biological chains of aquatic plants, microorganisms, algae and the like and serious damage to the water body structure. At present, the treatment of oily wastewater mainly comprises four main methods: the method is a physical method mainly comprising a centrifugal separation method, a coarse granulation method and a membrane separation method; the second is a chemical method mainly based on a chemical oxidation method and a photochemical method; the third is a physical chemical method mainly comprising a flotation method, an adsorption method and a magnetic adsorption separation method; fourthly, a biochemical method mainly based on an activated sludge method and a biofilm method.
In the related art, in order to separate high turbidity and high emulsion oil-water separation field, a separation treatment process combining an air floatation method and a biochemical method is generally adopted. However, in order to ensure the oil-water separation effect, a demulsifier and a flocculant are generally added to enhance the air flotation effect in the ordinary air flotation method, so that a large amount of scum sludge is generated, hazardous waste is generated, and the transportation and treatment cost is increased; meanwhile, due to the poor biochemical performance of the oily wastewater, the retention time of biochemical treatment is very long, the occupied area of equipment is large, the oil removal is slow, sludge expansion is easy to generate under the condition of water quality change, and the like, so that the biochemical effect is not ideal, and the effluent quality is not stable.
Therefore, a low-cost oily wastewater treatment system for efficiently removing oil is imperative.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an oily wastewater treatment system, which aims to solve the technical problems of low efficiency and high cost of the traditional oily wastewater treatment system in the related art.
The invention provides an oily wastewater treatment system, which comprises a wastewater pool, a three-phase separation device, a first filter, a coalescing filter, a mixer, a catalytic tower, a second filter and a clean water pool which are connected in sequence;
the three-phase separation device is provided with a wastewater inlet position, a sludge discharge position, a clear water outlet position and a first oil recovery position, and comprises a first body, a second body and a connecting plate;
the first body is communicated with the second body through the connecting plate;
the wastewater inlet position is arranged on the side wall of the first body, the sludge discharge position is arranged at the bottom of the first body, the clear water outlet position is arranged on the side wall of the second body, and the first oil recovery position is arranged at the top of the second body; the waste water inlet position is communicated with the waste water pool, and the clear water outlet position is communicated with the first filter;
the dosing device is connected to the mixer; the dosing device is used for supplying an oxidant to the mixer.
Optionally, the connecting plate comprises a connecting real part and a connecting hollow part, and the connecting real part is located above the connecting hollow part;
the height of the connecting position of the connecting real part and the connecting hollow-out part is lower than that of the wastewater entering position.
Optionally, a first transverse plate, a demulsification baffle and a packed bed are arranged in the first body;
the first transverse plate is arranged at the connecting position of the connecting real part and the connecting hollow part of the first body in parallel; the demulsification baffle is vertically arranged above the first transverse plate, and the demulsification baffle and the top of the first body are arranged at intervals; the packed bed is arranged above the first transverse plate and is positioned between the demulsification chamber baffle and the real connecting part; and/or the presence of a gas in the gas,
a second transverse plate and an oil-water baffle plate are arranged in the second body;
the oil-water baffle is vertically arranged downwards at the top of the second body, the oil-water baffle is arranged at intervals with the side wall of the second body, and the oil-water baffle is arranged opposite to the clear water outflow position;
two ends of the second transverse plate are respectively connected with the real connecting part and the oil-water baffle plate, and the second transverse plate is arranged opposite to the first oil recovery position; and a convex part protruding downwards is arranged on the second transverse plate.
Optionally, the first cross plate comprises a cross plate real part and a cross plate hollow part;
the demulsification baffle is arranged at the connecting position of the transverse plate real part and the transverse plate hollow part;
the side wall of the first body, the transverse plate real part and the demulsification baffle enclose to form a demulsification chamber;
the demulsification baffle, the hollow-out part of the transverse plate and the connecting real part enclose to form a filling chamber; and/or the presence of a gas in the gas,
the packed bed is a corrugated packed bed.
Optionally, a heater is further arranged in the demulsification chamber, and the temperature in the demulsification chamber is 40-50 ℃.
Optionally, the bottom of the first body is obliquely arranged in an inverted horn shape.
Optionally, the flow rate of the oxidant is 10-20ml/m3。
Optionally, the oily wastewater treatment system further comprises a first pump connected between the wastewater pond and the three-phase separation device.
Optionally, the oily wastewater treatment system further comprises a buffer water tank and a second pump body;
the buffer water tank is communicated with the three-phase separation device, and the second pump body is communicated with the buffer water tank and the first filter; and/or the presence of a gas in the gas,
the oily wastewater treatment system also comprises a return pipeline system, and the return pipeline system is used for communicating the wastewater pool with the three-phase separation device, the first filter, the coalescing filter, the catalytic tower and the second filter respectively.
Optionally, the second filter is a TC filter, and the TC filter includes a filter medium made of activated carbon with a ferric oxide material deposited on the surface.
Compared with the prior art, the invention has the following beneficial effects:
in the technology of the invention, the oily wastewater treatment system is optimally arranged, so that the oil recovery rate of the oily wastewater reaches more than 80%, and the clear water after deoiling has stable quality and is not influenced by the incoming water of the oily wastewater; meanwhile, the whole system does not generate secondary pollutants such as oil scum, activated sludge and the like, the occupied area of the whole system is small and is only 30% of the whole occupied area of the traditional air floatation method and biochemical method, and the industrial operation is facilitated. Specifically, a wastewater pond, a three-phase separation device, a first filter, a coalescing filter, a mixer, a catalytic tower, a second filter and a clean water pond which are connected in sequence are arranged. The wastewater pool is used for collecting oily wastewater. The three-phase separation device is used for separating solid and liquid and oil and water in the oily wastewater, so that the separation of oil, water and solid particles is realized. The first filter is used for filtering suspended matter impurities in the separated water, and the quality of the water is improved. The coalescence filter is used for filtering and separating a small amount of emulsified oil in the separated water, and further improves the oil removal rate of the water. The mixer, the dosing device and the catalytic tower are used for removing organic matters which are difficult to degrade, such as aliphatic hydrocarbon, polycyclic aromatic hydrocarbon, organic acids, phenols and the like, in water and have sterilization effect. The second filter is used for further removing residual organic matters such as dissolved oil in water, colloid, suspended matters, large-particle impurities and the like, so that the stability of the quality of the discharged water is ensured.
Drawings
FIG. 1 is a schematic process flow diagram of an oily wastewater treatment system in one embodiment of the present invention;
fig. 2 is a schematic structural diagram of a three-phase separation apparatus according to an embodiment of the present invention.
The reference numbers illustrate:
100 wastewater pool 50 Oil collecting tank
200 Three-phase separation device 201 Waste water entry point
300 First filter 202 Sludge discharge position
400 Coalescing filter 203 Clear water outflow position
500 Mixing device 204 Heating device
600 Catalytic tower 210 First body
700 Second filter 211 First transverse plate
800 Clean water tank 212 Demulsification baffle
900 Medicine adding device 213 Packing bed
10 First pump body 220 Second body
20 Second pump body 221 Second transverse plate
30 Buffer water tank 222 Oil-water baffle
40 Return conduit system 230 Connecting plate
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and beneficial effects of the present invention more clearly apparent, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the present invention provides an oily wastewater treatment system, comprising a wastewater tank 100, a three-phase separation device 200, a first filter 300, a coalescing filter 400, a mixer 500, a catalytic tower 600, a second filter 700, and a clean water tank 800, which are connected in sequence;
the three-phase separation device 200 comprises a wastewater inlet 201, a sludge discharge 202, a clean water outlet 203 and a first oil recovery level (not shown in the figure), wherein the three-phase separation device 200 comprises a first body 210, a second body 220 and a connecting plate 230;
the first body 210 and the second body 220 are communicated through the connection plate 230;
the wastewater inlet position 201 is arranged on the side wall of the first body 210, the sludge discharge position 202 is arranged at the bottom of the first body 210, the clear water outlet position 203 is arranged on the side wall of the second body 220, and the first oil recovery position is arranged at the top of the second body 220; the wastewater inlet 201 is communicated with the wastewater pond 100, and the clear water outlet 203 is communicated with the first filter 300;
a medicine adding device 900 connected to the mixer 500; the dosing device 900 is used to supply an oxidant to the mixer 500.
In this embodiment, a three-phase separator 200 is provided to separate solid and liquid from oil in the oily wastewater. In order to remove suspended impurities in the separated water, a first filter 300 is provided. To remove the de-emulsified oil from the water, a coalescing filter 400 is provided. In order to remove residual organic impurities in the tail water, a second filter 700 is provided. In order to remove organic matters which are difficult to degrade in water, a medicine adding device 900 and a mixer 500 are arranged.
Specifically, the oxidant passes through charge device 900, with follow the water that coalescence filter 400 came out is in the quick mixing in the blender 500, then let in among the catalytic tower 600, and with the catalytic filler contact in the catalytic tower 600, under the catalysis of this catalytic filler, produce hydroxide ion rapidly (need explain, its speed of producing hydroxide ion is 40 times of the hydroxide ion that ordinary hydrogen peroxide produced) to organic matter in the quick decomposition water, through detecting, the clearance of aquatic COD can reach more than 95%. It will be appreciated that the oxidising agent also has a bactericidal effect. The amount of coliform bacteria in the water from the catalytic tower 600 was found to be less than 104one/mL. For example but not limited toThe oxidizing agent is, however, a hydroxyl oxidizing agent.
Therefore, the oily wastewater treatment system is optimally arranged, so that the oil recovery rate of the oily wastewater reaches more than 80%, and the quality of the clear water after deoiling is stable and is not influenced by the incoming water of the oily wastewater; meanwhile, the whole system does not generate secondary pollutants such as oil scum, activated sludge and the like, the occupied area of the whole system is small and is only 30% of the whole occupied area of the traditional air floatation method and biochemical method, and the industrial operation is facilitated.
Specifically, a wastewater tank 100, a three-phase separation device 200, a first filter 300, a coalescing filter 400, a mixer 500, a catalytic tower 600, a second filter 700, and a clean water tank 800 are provided, which are connected in this order. The wastewater tank 100 is used for collecting oily wastewater. The three-phase separation device 200 is used for separating solid and liquid from oil in the oily wastewater, thereby realizing the separation of oil, water and solid particles. The first filter 300 is used for filtering suspended impurities in the separated water, and improving the quality of the water. The coalescing filter 400 is used for filtering and separating a small amount of emulsified oil in the separated water, and further improves the oil removal rate of the water. The mixer 500, the medicine adding device 900 and the catalytic tower 600 are used for removing refractory organic matters such as aliphatic hydrocarbon, polycyclic aromatic hydrocarbon, organic acid, phenols and the like in water and have sterilization effect. The second filter 700 is used for further removing residual organic matters such as dissolved oil in water, colloid, suspended matters, large-particle impurities and the like, so that the stability of the quality of the discharged water is ensured.
Optionally, the connection plate 230 includes a connection real part and a connection hollow part, and the connection real part is located above the connection hollow part;
the height of the connection position of the connection real part and the connection hollow-out part is lower than that of the wastewater inlet 201.
In this embodiment, in order to simplify the structure of the three-phase separator 200, the connection plate 230 is provided with a connection real part and a connection hollow part. It should be understood that the real connection part is connected to the top of the three-phase separating apparatus 200. It should be explained that the real connecting part is a solid plate, and the hollow connecting part may be provided with a plurality of small holes on the solid plate, or may not be provided with any partition. Correspondingly, the small holes are provided in plurality, and the small holes are uniformly arranged at the connecting hollow-out portion of the connecting plate 230 at intervals.
Optionally, a first transverse plate 211, a demulsification baffle 212 and a packed bed 213 are arranged in the first body 210;
the first horizontal plate 211 is disposed in parallel at a connection position of the connection real part and the connection hollow part of the first body 210; the demulsification baffle 212 is vertically arranged above the first transverse plate 211, and the demulsification baffle 212 and the top of the first body 210 are arranged at intervals; the packed bed 213 is arranged above the first cross plate 211, and the packed bed 213 is positioned between the baffle of the demulsification chamber and the real connecting part.
In this embodiment, in order to simplify the structure of the first body 210, a first horizontal plate 211 and a demulsification baffle 212 are disposed in the first body 210 to separate the first body 210 into a plurality of small functional chambers, so as to implement different operation steps of three-phase separation.
Specifically, the first horizontal plate 211 is disposed in parallel inside the first body 210 to separate the first body 210 into an upper multifunctional chamber and a lower multifunctional chamber, the upper multifunctional chamber is used for three-phase separation, and the lower multifunctional chamber is used for separating out solid substances in the oily wastewater. Meanwhile, the lower chamber is communicated with the second body 220 to introduce the oil-water mixture with the solid substances separated into the second body 220 for oil-water separation.
Specifically, the upper chamber is separated into two small multi-functional chambers, a breaking chamber and a packing chamber, by the breaking baffle 212. The oil-containing wastewater is firstly demulsified and then subjected to three-phase separation operation in a packing chamber. The packing chamber is internally provided with a packed bed 213, the packed bed 213 is arranged at the top of the first body 210 at intervals, and the height of the packed bed 213 is lower than the plate height of the demulsification baffle 212, so that the inflow of the oil-containing wastewater after demulsification is realized.
Optionally, a second horizontal plate 221 and an oil-water baffle 222 are arranged in the second body 220;
the oil-water baffle 222 is vertically and downwardly arranged at the top of the second body 220, the oil-water baffle 222 is arranged at an interval with the side wall of the second body 220, and the oil-water baffle 222 is arranged opposite to the clean water outflow position 203;
both ends of the second horizontal plate 221 are respectively connected to the real connecting part and the oil-water baffle 222, and the second horizontal plate 221 is arranged opposite to the first oil recovery position; the second horizontal plate 221 is provided with a downward convex portion.
In this embodiment, in order to simplify the structure of the second body 220, a second horizontal plate 221 and an oil-water baffle 222 are disposed in the second body 220 to separate the second body 220 into a plurality of small functional chambers, so as to achieve the purpose of oil-water separation.
Specifically, the oil-water baffle 222 is vertically disposed downward on the top of the second body 220 to separate the second body 220 into an oil-water mixing area and a clean water area. And a second horizontal plate 221 is provided above the oil-water mixing region to recover the oil in the oil collecting tank 50 through the first oil recovery position after the oil layer in the oil-water mixing region reaches the observation position. Meanwhile, the clean water area is correspondingly provided with a clean water outflow position 203, and the clean water in the clean water area flows into the first filter 300 through the clean water outflow position 203.
Specifically, the convex part is provided with meshes so that oil can enter the groove of the convex part.
Optionally, the first horizontal plate 211 comprises a horizontal plate real part and a horizontal plate hollow part;
the demulsification baffle 212 is arranged at the connecting position of the horizontal plate real part and the horizontal plate hollow part;
the side wall of the first body 210, the real part of the transverse plate and the demulsification baffle 212 enclose to form a demulsification chamber;
the demulsification baffle 212, the hollow-out part of the transverse plate and the connecting real part enclose to form a filling chamber.
In this embodiment, in order to simplify the structure of the first horizontal plate 211, the first horizontal plate 211 is set as a horizontal plate real part and a horizontal plate hollow part. It should be explained that the real part of the transverse plate is a solid plate, and the hollow part of the transverse plate is a plate provided with a filtering hole. For example, but not limited to, the filtering holes are provided in plurality, and the filtering holes are uniformly arranged in the hollow-out part of the transverse plate at intervals.
Optionally, to extend the time for three-phase separation, the packed bed 213 is a corrugated packed bed. Thus, the probability of collision among solid particles, water molecules and oil molecules is increased, and the efficiency of three-phase separation is improved.
Optionally, an MXenes-based nanocomposite coating is coated on the corrugated plate of the corrugated packed bed, so that oil droplets on the corrugated plate coalesce and float upwards along the corrugated plate, thereby realizing coarse separation of oil and water.
Optionally, a heater 204 is further arranged in the demulsification chamber, and the temperature in the demulsification chamber is 40-50 ℃.
In this embodiment, in order to ensure the completeness of emulsification of the oily wastewater, a heater 204 is further provided. The heater 204 is disposed on a sidewall of the first body 210, and the heater 204 is located in the demulsification chamber. For example, but not limited to, the temperature of the demulsification chamber is controlled to be stabilized at 50 ℃ so as to efficiently perform demulsification operation of the oily wastewater.
Optionally, the bottom of the first body 210 is disposed obliquely in an inverted trumpet shape.
In this embodiment, for better collection of the sludge separated in the three-phase separation device 200, the bottom of the first body 210 is inclined to form a funnel shape, so as to collect the sludge by gravity.
Optionally, the side wall of the bottom of the first body 210 is inclined along the axial diameter of the first body 210 by an angle of 25-75 ℃. For example, but not limited to, the sidewall of the bottom of the first body 210 is inclined at an angle of 45 ℃ along the axial diameter of the first body 210.
Optionally, the flow rate of the oxidant is 10-20ml/m3。
In this example, the flow rate range of the oxidizing agent was set in order to remove organic substances that are difficult to degrade in the separated water more effectively.
Specifically, an oxidant is added according to the soluble COD content of the incoming water, and the higher the COD content is, the larger the adding amount of the oxidant is, the higher the removal rate of the refractory organic matters is. It should be understood that the oxidizing agent is a hydroxyl oxidizing agent, which naturally decomposes in water to water without polluting the environment.
Specifically, according to experimental data, the COD content in the sewage after front-end treatment is generally 300-500 mg/L, so that the amount of the oxidant is controlled to be 10-20ml/m3And (4) finishing.
Optionally, the oily wastewater treatment system further comprises a first pump 10, the first pump 10 being connected between the wastewater tank 100 and the three-phase separation device 200.
In this embodiment, in order to improve the purification efficiency of the oily wastewater, the first pump body 10 is further provided. The first pump 10 is connected between the wastewater tank 100 and the three-phase separation device 200, and is configured to pump wastewater in the wastewater tank 100 into the three-phase separation device 200 to perform solid-liquid and oil-water separation.
Optionally, the oily wastewater treatment system further comprises a buffer water tank 30 and a second pump body 20;
the buffer tank 30 communicates with the three-phase separator 200, and the second pump body 20 communicates with the buffer tank 30 and the first filter 300.
In this embodiment, in order to reduce mechanical damage to the first filter 300, the surge tank 30 and the second pump body 20 are provided. The second pump body 20 serves to give a driving force for transporting water from the buffer tank 30 to the first filter 300.
For example, but not limiting of, the buffer tank 30 is connected to the wastewater basin 100. Therefore, the subsequent maintenance is convenient; when the clean water from the second body 220 is not standard, the clean water can be sent back to the wastewater pond 100 in time to perform a second three-phase separation operation.
Optionally, the oily wastewater treatment system further comprises a return piping system 40, and the return piping system 40 connects the wastewater tank 100 with the three-phase separation device 200, the first filter 300, the coalescing filter 400, the catalytic tower 600, and the second filter 700, respectively.
In this embodiment, in order to facilitate subsequent maintenance, a return pipe system 40 is further provided. Specifically, the return piping system 40 includes a wastewater-three phase separation piping that communicates the wastewater tank 100 and the three phase separation device 200. For example, but not limited to, the wastewater-three phase separation conduit communicates the wastewater tank 100 and the sludge discharge level 202 of the first body 210. The return piping system 40 includes a waste-first filtering pipe which communicates the waste tank 100 and the first filter 300. The return piping system 40 includes a waste water-coalescing filter pipe communicating the waste water tank 100 and the coalescing filter 400. The return piping system 40 includes a wastewater-catalytic pipe communicating the wastewater tank 100 and the catalytic tower 600. The return piping system 40 includes a waste-water-second filtering pipe communicating the waste tank 100 and the second filter 700.
Optionally, a second oil recovery location is disposed on the first filter 300, and the second oil recovery location is disposed at the top end of the first filter 300 to recover the oil filtered and recovered in the first filter 300. The second oil recovery level communicates with the oil sump 50.
Optionally, the second filter 700 is a TC filter, and the TC filter includes a filter medium made of activated carbon with iron oxide deposited on the surface.
In this embodiment, in order to ensure the stability of the discharged water, the second filter 700 is set as a TC filter. The TC filter is filled with TC fillers, and a special material with ferric oxide deposited on the surface of active carbon is used as a filter medium to remove residual organic matters such as dissolved oil in the tail water, so that the quality stability of the tail water is ensured.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. An oily wastewater treatment system is characterized by comprising a wastewater pool, a three-phase separation device, a first filter, a coalescing filter, a mixer, a catalytic tower, a second filter and a clean water pool which are sequentially connected;
the three-phase separation device is provided with a wastewater inlet position, a sludge discharge position, a clear water outlet position and a first oil recovery position, and comprises a first body, a second body and a connecting plate;
the first body is communicated with the second body through the connecting plate;
the wastewater inlet position is arranged on the side wall of the first body, the sludge discharge position is arranged at the bottom of the first body, the clear water outlet position is arranged on the side wall of the second body, and the first oil recovery position is arranged at the top of the second body; the waste water inlet position is communicated with the waste water pool, and the clear water outlet position is communicated with the first filter;
the dosing device is connected to the mixer; the dosing device is used for supplying an oxidant to the mixer.
2. The oily wastewater treatment system according to claim 1, wherein the connection plate comprises a connection real part and a connection hollow part, the connection real part being located above the connection hollow part;
the height of the connecting position of the connecting real part and the connecting hollow-out part is lower than that of the wastewater entering position.
3. The oily wastewater treatment system of claim 2, wherein a first transverse plate, a demulsification baffle plate and a packed bed are arranged in the first body;
the first transverse plate is arranged at the connecting position of the connecting real part and the connecting hollow part of the first body in parallel; the demulsification baffle is vertically arranged above the first transverse plate, and the demulsification baffle and the top of the first body are arranged at intervals; the packed bed is arranged above the first transverse plate and is positioned between the demulsification chamber baffle and the real connecting part; and/or the presence of a gas in the gas,
a second transverse plate and an oil-water baffle plate are arranged in the second body;
the oil-water baffle is vertically arranged downwards at the top of the second body, the oil-water baffle is arranged at intervals with the side wall of the second body, and the oil-water baffle is arranged opposite to the clear water outflow position;
two ends of the second transverse plate are respectively connected with the real connecting part and the oil-water baffle plate, and the second transverse plate is arranged opposite to the first oil recovery position; and a convex part protruding downwards is arranged on the second transverse plate.
4. The oily wastewater treatment system of claim 3, wherein the first cross plate comprises a cross plate real part and a cross plate hollow part;
the demulsification baffle is arranged at the connecting position of the transverse plate real part and the transverse plate hollow part;
the side wall of the first body, the transverse plate real part and the demulsification baffle enclose to form a demulsification chamber;
the demulsification baffle, the hollow-out part of the transverse plate and the connecting real part enclose to form a filling chamber; and/or the presence of a gas in the gas,
the packed bed is a corrugated packed bed.
5. The oily wastewater treatment system of claim 4, wherein a heater is further arranged in the demulsification chamber, and the temperature in the demulsification chamber is 40-50 ℃.
6. The oily wastewater treatment system of any one of claims 1 to 5, wherein the bottom of the first body is obliquely arranged in an inverted trumpet shape.
7. The oily wastewater treatment system according to any one of claims 1 to 5, wherein the flow rate of the oxidizing agent is10-20ml/m3。
8. The oily wastewater treatment system of any one of claims 1 to 5, further comprising a first pump connected between the wastewater pond and the three-phase separation device.
9. The oily wastewater treatment system of claim 7, further comprising a buffer tank and a second pump body;
the buffer water tank is communicated with the three-phase separation device, and the second pump body is communicated with the buffer water tank and the first filter; and/or the presence of a gas in the gas,
the oily wastewater treatment system also comprises a return pipeline system, and the return pipeline system is used for communicating the wastewater pool with the three-phase separation device, the first filter, the coalescing filter, the catalytic tower and the second filter respectively.
10. The oily wastewater treatment system of any one of claims 1 to 5, wherein the second filter is a TC filter comprising a filter medium of activated carbon with a ferric oxide material deposited on the surface.
CN202011144158.8A 2020-10-23 2020-10-23 Oily wastewater treatment system Pending CN112209530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011144158.8A CN112209530A (en) 2020-10-23 2020-10-23 Oily wastewater treatment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011144158.8A CN112209530A (en) 2020-10-23 2020-10-23 Oily wastewater treatment system

Publications (1)

Publication Number Publication Date
CN112209530A true CN112209530A (en) 2021-01-12

Family

ID=74054655

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011144158.8A Pending CN112209530A (en) 2020-10-23 2020-10-23 Oily wastewater treatment system

Country Status (1)

Country Link
CN (1) CN112209530A (en)

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