CN105601041A - Advanced treatment device for oil refining wastewater - Google Patents

Abstract

The invention relates to a refinery wastewater advanced treatment device, comprising a wastewater regulating tank, a high-efficiency air flotation tank, an advanced oxidation tank, a baffle type aerated biochemical filter, a quicksand filter and a clear water tank; the high-efficiency air flotation tank is a mixing zone from bottom to top and the separation area, the separation area includes the water catchment area and the oil and slag collection area located in the water catchment area; the advanced oxidation tank includes the aeration oxidation area and the sedimentation area, the bottom of the aeration oxidation area is equipped with an ozone aeration plate, and the ozone aeration The water distribution branch pipe of the advanced oxidation tank is arranged on the top of the plate, and the water distribution branch pipe of the advanced oxidation tank is connected to the water inlet pipe of the advanced oxidation tank. The ozone aeration plate is connected to the blower outside the advanced oxidation tank through the aeration pipe, and the blower is connected to the ozone generator through the pipe; The upper part of the baffle type aerated biochemical filter is cylindrical and the lower part is conical, including the downstream area, the upper flow area and the sludge area; the quicksand filter includes the water distribution area, the sand washing area and the sand filter area.

Description

A refinery wastewater advanced treatment device

technical field

The invention relates to the technical field of environmental protection, in particular to an advanced treatment device for oil refining wastewater.

Background technique

With the development of society and the continuous improvement of people's living standards, the demand for water resources is also increasing. The severe shortage of water resources and water pollution have become the restrictive factors of our country's economic construction and social development. Sewage reuse is one of the important ways to alleviate the shortage of water resources in my country. Oil refining and processing enterprises are major users of water consumption and discharge of sewage.

Refining wastewater is a multiphase system integrating suspended oil, emulsified oil, dissolved organic matter and salt. The main pollutants include petroleum, sulfide, COD, BOD, suspended solids, volatile phenol, ammonia nitrogen and chloride ions, etc. Suspended solids and salts come from the electric desalination process. Oil and sulfides, phenols, and cyanides dissolved in sewage are related to the crude oil processing process. Refinery wastewater is not easy to degrade, has poor biodegradability, and is difficult to treat.

The advanced treatment methods of oil refinery wastewater are divided into physical methods, chemical methods and biological treatment methods. Physical treatment methods include filtration, precipitation, membrane separation, adsorption and air stripping, etc. Chemical treatment methods include flocculation, electrodialysis, ion exchange, chemical oxidation, disinfection, lime treatment, electrochemical and photochemical treatment, etc. Biological treatment technologies include activated sludge method, biofilm method and natural biological treatment method. Biofilm methods include traditional biofilters, biological turntables, biological contact oxidation, new biological fluidized beds, moving bed biofilm reactors and composite biofilm reactors. Composite biofilm reactors mainly include upflow anaerobic sludge bed, anaerobic biological filter, microporous membrane bioreactor, sequencing batch biofilm reactor and aerated biological filter. The advanced treatment technology of oil refinery wastewater optimizes various methods to form a combined process technology to separate and remove the pollutants in the wastewater, or convert them into pollution-free substances, so as to purify the water body.

Existing refinery wastewater advanced treatment technologies and devices have some defects, such as incomplete removal of pollutants, single types of pollutants removed, chloride ions, ammonia nitrogen, and electrical conductivity of reused water are higher than those of fresh water, and the pH value is lower. Fresh water is low.

Contents of the invention

The technical problem to be solved by the present invention is: in order to solve the above-mentioned problems in the advanced treatment of oil refinery wastewater, the present invention provides an advanced treatment device for oil refinery wastewater.

The technical solution adopted by the present invention to solve the technical problem is: a refinery wastewater advanced treatment device, including a wastewater regulating tank, a high-efficiency air flotation tank, an advanced oxidation tank, a baffle type aerated biochemical filter, a quicksand filter and a clear water tank; The wastewater regulating tank, the high-efficiency air flotation tank, the advanced oxidation tank, the baffle type aerated biochemical filter, the quicksand filter and the clear water tank are connected in sequence.

The waste water regulating pond includes a waste water regulating pond inlet pipe and a waste water regulating pond outlet pipe for regulating the water quality and quantity of waste water;

The high-efficiency air flotation tank includes a high-efficiency air flotation tank inlet pipe and a high-efficiency air flotation tank outlet pipe for discharging treated water. The high-efficiency air flotation tank is composed of a mixing zone and a separation zone from bottom to top; the separation zone includes a collection The water area and the oil and slag collection area located in the water collection area; the upper part of the mixing area of the high-efficiency air flotation tank is provided with a high-efficiency air flotation tank aeration disc, and the top of the high-efficiency air flotation tank aeration disc is provided with a high-efficiency air flotation tank Water distribution branch pipe, the water distribution branch pipe of the high-efficiency air flotation tank is connected to the water inlet pipe of the high-efficiency air flotation tank, and the aeration plate of the high-efficiency air flotation tank is connected to the blower of the high-efficiency air flotation tank outside the high-efficiency air flotation tank; The three-phase separator of the air flotation tank, the three-phase separator of the high-efficiency air flotation tank includes a deflector and a triangular guide ring located below the deflector and used in conjunction with the deflector. The triangular guide ring is installed on the high-efficiency gas On the inner wall of the floating pool, the top of the deflector has the same shape as the separation zone, the bottom of the deflector is trumpet-shaped, and the inner diameter of the lower part of the deflector is greater than the inner diameter of the triangular guide ring; The upper part of the outer wall of the separation area is provided with a high-efficiency air flotation tank overflow weir, and the high-efficiency air flotation tank overflow weir is connected with the high-efficiency air flotation tank outlet pipe; the oil and slag collection area is equipped with oil residue scrapers and oil residue tanks When the wastewater overflows from bottom to top, water, oil and scum enter the lower part of the deflector through the triangular guide ring, and the oil and scum continue to enter the oil and slag collection area upwards, and the water passes through the deflector and the triangular guide. The gap between the flow rings enters the catchment area; in order to achieve a better effect of wastewater treatment, the water distribution branch pipe of the high-efficiency air flotation pool is set in a concentric circle shape or a cross shape, and the water distribution branch pipe has a horizontal radiation outlet; further, the The aeration disc of the high-efficiency air flotation tank described above is a microporous aeration disc with micropores uniformly arranged therein.

The outlet pipe of the high-efficiency air flotation tank is connected with the water inlet pipe of the advanced oxidation tank.

The advanced oxidation tank includes an aeration oxidation zone and a sedimentation zone, an ozone aeration pan is arranged at the bottom of the aeration oxidation zone, and an advanced oxidation tank water distribution branch is arranged above the ozone aeration pan. The pool water branch pipe is connected to the water inlet pipe of the advanced oxidation tank, and the ozone aeration pan is connected to the ozone blower outside the advanced oxidation tank through the aeration pipe, and the ozone blower is connected to the ozone generator through a pipeline; a baffle is provided in the precipitation area , the baffle and the inner wall of the sedimentation tank form a waste water flow channel for the wastewater to enter the sedimentation area. The upper part of the outlet of the sedimentation area is provided with an overflow weir of the advanced oxidation tank; the bottom of the sedimentation area is designed as a conical structure, and the sediment discharge valve.

The upper part of the baffle type aerated biochemical filter is cylindrical and the lower part is a conical structure, including a downstream area, an upper flow area and a sludge area; the downstream area is located in the cylindrical structure of the baffled aerated biochemical filter The middle part is a cylindrical structure. The upper part of the downstream area is equipped with a baffle type aerated biochemical filter inlet pipe and a baffled aerated biochemical filter water distribution pipe. Area aeration pipe, the bottom of the downstream area is provided with a baffle plate, and the longitudinal section of the baffle plate is trumpet-shaped; There is filler in the upstream area, the lower part is equipped with an aeration pipe in the upstream area, and the outlet of the upper part of the upstream area is provided with an overflow weir of a baffled aerated biochemical filter; the sludge area is located at the bottom of the baffled biochemical aerated filter, Sludge discharge valves are provided at the bottom of the downflow zone and the upflow zone, and the bottom of the sludge zone.

The quicksand filter includes a quicksand filter inlet pipe and a quicksand filter outlet pipe for discharging treated water, and the quicksand filter includes a water distribution area, a sand washing area and a sand filter area; the water distribution area Located at the lower part of the quicksand filter, the water distribution area is provided with a quicksand filter water distribution pipe, and the quicksand filter water distribution pipe is connected to the quicksand filter water inlet pipe. In order to achieve a better wastewater treatment effect, the quicksand filter water distribution pipes are arranged in concentric circles Shape, the water distribution pipe of the quicksand filter has a downward radiating water outlet; the sand washing area is located in the center of the quicksand filter, and is a cylindrical cylindrical structure, and the lower end opening of the cylindrical cylindrical structure is located at the bottom of the quicksand filter. The upper opening of the cylindrical cylindrical structure is located on the upper part of the quicksand filter, and the middle part of the sand washing area is equipped with an air lift pipe, which is connected to the quick sand filter blower outside the quick sand filter, and the upper part of the sand washing area is equipped with sand and water sedimentation and separation The upper part of the sand-water sedimentation and separation area is equipped with an overflow weir for the sand washing area, which is connected to the sand washing water discharge pipe and the inlet pipe of the baffle type aerated biochemical filter. Sand channel; the sand filter area is located at the periphery of the sand washing area, filled with fine sand in the sand filter area, the sand filter area overflow weir is provided on the upper part of the sand filter area, and the sand filter area overflow weir is connected to the outlet pipe of the quicksand filter, and the quicksand The water filtered and treated by the filter enters the clean water pool for reuse.

A method for wastewater treatment using the above-mentioned refinery wastewater advanced treatment device has the following steps:

①Wastewater enters the wastewater regulating tank through the inlet pipe of the wastewater regulating tank to adjust the water quality and quantity.

②Then the waste water enters the middle and lower part of the high-efficiency air flotation tank through the inlet pipe of the high-efficiency air flotation tank; The scum adheres to form a mixture that rises under the action of buoyancy. Under the action of the three-phase separator in the high-efficiency air flotation tank, the mixture rises to the oil and slag collection area. Under the action of the oil slag scraper, the slick oil and scum enter The oil residue tank is cleaned and shipped out; the water after separation and treatment enters the water collection area of the high-efficiency air flotation tank under the action of the deflector in the three-phase separation area of the high-efficiency air flotation tank, and enters the advanced oxidation through the overflow weir of the high-efficiency air flotation tank and the outlet pipe of the high-efficiency air flotation tank Pool inlet pipe.

③ The waste water enters the middle and lower part of the advanced oxidation tank through the water inlet pipe of the advanced oxidation tank and the water distribution branch pipe of the advanced oxidation tank; The small molecular substances absorbed and adsorbed, the oxidized and decomposed wastewater enters the wastewater flow channel of the sedimentation area, and the three-phase separator of the advanced oxidation tank realizes solid-liquid separation; the sediment sinks to the lower part of the sedimentation area of the advanced oxidation tank under the action of gravity , discharged through the sediment discharge valve at the bottom; waste water enters the water inlet pipe of the baffled aerated biochemical filter through the overflow weir of the advanced oxidation tank and the outlet pipe of the advanced oxidation tank.

④Wastewater enters the downstream area of the baffled aerated biochemical filter through the water inlet pipe of the baffled aerated biochemical filter and the water distribution pipe of the baffled aerated biochemical filter. Biochemical reactions occur at the intersection of the fillers, and at the same time, the fillers in the downstream area filter the wastewater. The sludge sinks to the sludge area and is discharged through the sludge discharge valve at the bottom of the sludge area, and the water treated by the baffle type aerated biochemical filter enters the quicksand filter through the overflow weir of the baffle type aerated biochemical filter inlet pipe.

⑤Wastewater enters the lower part of the quicksand filter through the water inlet pipe of the quicksand filter and the water distribution pipe of the quicksand filter. The water distribution pipe of the quicksand filter realizes uniform water distribution, and the waste water enters the sand filter area. In the sand filter area, the overflow weir in the sand filter area and the outlet pipe of the quicksand filter enter the clear water tank for reuse; the airflow generated by the blower in the quicksand filter drives the sand and water in the sand washing area to flow upwards, and at the same time the sand is washed, and the airflow drives the sand washing The sand and water in the zone enter the sand-water sedimentation and separation zone. Due to the different specific gravity of sand and water, the fine sand settles down and flows into the sand filter zone through the sand return channel, so that the fine sand in the sand filter zone moves from top to bottom continuously. , the water in the sand-water sedimentation and separation area enters the baffle type aerated biochemical filter for retreatment through the overflow weir in the sand washing area and the sand washing water discharge pipe.

⑥ The sediment produced by the advanced oxidation tank and the sludge produced by the baffle type aerated biochemical filter are concentrated and dehydrated before being transported abroad.

The beneficial effects of the invention are: adapting measures to local conditions, less infrastructure investment, convenient maintenance, lower energy consumption, better treatment effect on waste water, realizing resource utilization of waste water and comprehensive utilization of waste water.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic structural view of a high-efficiency air flotation tank according to an embodiment of the present invention.

In Figure 1: 1. High-efficiency air flotation tank, 1-1. High-efficiency air flotation tank inlet pipe, 1-2. High-efficiency air flotation tank water distribution branch pipe, 1-3. Mixing area, 1-4. Water collection area, 1-5. Oil collection and slag collection area, 1-6. High-efficiency air flotation tank aeration disc, 1-7. High-efficiency air flotation tank blower, 1-8. High-efficiency air flotation tank three-phase separator, 1-9. High-efficiency air flotation tank overflow weir, 1- 10. Oil residue scraper, 1-11. Oil residue tank.

Fig. 2 is a schematic structural diagram of an advanced oxidation pool according to an embodiment of the present invention.

In Figure 2: 2. Advanced oxidation tank, 2-1. Aeration oxidation zone, 2-2. Sedimentation zone, 2-3. Ozone aeration disc, 2-4. Advanced oxidation tank water branch pipe, 2-5. Advanced oxidation tank inlet pipe, 2-6. Ozone blower, 2-7. Ozone generator, 2-8. Baffle, 2-9. Advanced oxidation tank three-phase separator, 2-10. Advanced oxidation tank overflow weir, 2-11. Sediment discharge valve.

Fig. 3 is a schematic structural view of a baffle type aerated biochemical filter according to an embodiment of the present invention.

Among Fig. 3: 3. baffle type aerated biochemical filter, 3-1. downstream area, 3-2. upflow area, 3-3. sludge area, 3-4. baffle type aerated biochemical filter enters Water pipe, 3-5. Distributing pipe of baffled aerated biochemical filter, 3-6. Filling in downstream area, 3-7. Aeration pipe in downstream area, 3-8. Baffle plate, 3-9. Filling in upstream area , 3-10. Baffled aerated biochemical filter overflow weir, 3-11. Sludge discharge valve.

Fig. 4 is a schematic structural view of a quicksand filter according to an embodiment of the present invention.

Among Fig. 4: 4. quicksand filter, 4-1. quicksand filter inlet pipe, 4-2. quicksand filter cloth water pipe, 4-3. gas lift pipe, 4-4. quicksand filter air blower, 4-5 . Sand washing area overflow weir, 4-6. Sand return channel, 4-7. Sand filter area overflow weir.

Fig. 5 is a process flow diagram of an embodiment of the present invention.

detailed description

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Example

As shown in Figures 1 to 5, a refinery wastewater advanced treatment device of the present invention includes a wastewater regulating tank, a high-efficiency air flotation tank 1, an advanced oxidation tank 2, a baffle type aerated biochemical filter 3, a quicksand filter 4 and clear water pool; wastewater regulating pool, high-efficiency air flotation pool 1, advanced oxidation pool 2, baffle type aerated biochemical filter 3, quicksand filter 4 and clear water pool are connected in sequence.

The waste water regulating pond includes a waste water regulating pond inlet pipe and a waste water regulating pond outlet pipe for regulating the water quality and quantity of waste water;

The high-efficiency air flotation tank 1 includes a high-efficiency air flotation tank inlet pipe 1-1 and a high-efficiency air flotation tank outlet pipe for discharging treated water, and the high-efficiency air flotation tank is a mixing zone 1-3 and a separation zone from bottom to top; The separation zone includes a water collection area 1-4 and an oil and slag collection area 1-5 located in the water collection area; the upper part of the mixing area 1-3 of the high-efficiency air flotation tank is provided with an aeration disc 1 of the high-efficiency air flotation tank -6. The high-efficiency air flotation tank water distribution branch pipe 1-2 is arranged above the aeration disc of the high-efficiency air flotation tank. The floating tank aeration disc 1-6 is connected with a high-efficiency air flotation tank blower outside the high-efficiency air flotation tank; the described separation zone is provided with a high-efficiency air flotation tank three-phase separator 1-8, and the high-efficiency air flotation tank three-phase separator 1- 8 includes a deflector and a triangular deflector ring located below the deflector and used in conjunction with the deflector. The triangular deflector ring is installed on the inner wall of the high-efficiency air flotation pool. The upper part of the deflector and the separation area The shapes are the same, the lower part of the deflector is trumpet-shaped, and the inner diameter of the lower part of the deflector is larger than the inner diameter of the triangular guide ring; the upper part of the outer wall of the separation zone is provided with a high-efficiency air flotation tank overflow weir 1 -9, the overflow weir 1-9 of the high-efficiency air flotation tank is connected to the outlet pipe of the high-efficiency air flotation tank; the oil and residue collection area 1-5 is equipped with an oil residue scraper 1-10 and an oil residue tank 1-11; When the waste water overflows from the bottom to the top, water, oil and scum enter the lower part of the deflector through the triangular guide ring, and the oil and scum continue to enter the oil and slag collection area 1-5 upwards, and the water passes through the deflector and the scum. The gap between the triangular diversion rings enters the catchment area 1-4; in order to achieve a better wastewater treatment effect, the water distribution branch pipe 1-2 of the high-efficiency air flotation pool is set in a concentric circle shape or a cross shape, and the water distribution branch pipe has The water outlet is horizontally radiated; further, the aeration disc of the high-efficiency air flotation tank is a microporous aeration disc uniformly provided with micropores.

The outlet pipe of the high-efficiency air flotation tank communicates with the water inlet pipe 2-5 of the advanced oxidation tank.

The advanced oxidation tank 2 includes an aeration oxidation zone 2-1 and a precipitation zone 2-2, the bottom of the aeration oxidation zone is provided with an ozone aeration pan 2-3, and the top of the ozone aeration pan is provided with an advanced oxidation The water distribution branch pipe 2-4 of the pool, the water distribution branch pipe 2-4 of the advanced oxidation pool is connected to the water inlet pipe 2-5 of the advanced oxidation pool, and the ozone aeration plate 2-3 is connected to the outside of the advanced oxidation pool through the aeration pipe. The ozone blower 2-6, the ozone blower 2-6 communicates with the ozone generator 2-7 through the pipeline; The baffle plate 2-8 is provided in the described settling area, and this baffle plate forms with the inner wall of the settling tank as the waste water enters the settling area The wastewater flow channel, the outlet of the sedimentation area is provided with an advanced oxidation tank three-phase separator 2-9, the upper part of the outlet of the sedimentation area is equipped with an advanced oxidation tank overflow weir 2-10, and the bottom of the sedimentation area is designed as a conical structure. The bottom is provided with a sediment discharge valve 2-11.

The middle and upper part of the baffle type aerated biochemical filter 3 is cylindrical, and the lower part is a conical structure, including a downstream area 3-1, an upstream area 3-2 and a sludge area 3-3; the downstream area 3- 1 Located in the middle of the cylindrical structure of the baffled aerated biochemical filter, it is a cylindrical structure, and the upper part of the downstream area is provided with the water inlet pipe 3-4 of the baffled aerated biochemical filter and the cloth of the baffled aerated biochemical filter The water pipe 3-5, the middle part of the downstream area is provided with the filling material 3-6 of the downstream area, the lower part of the downstream area is provided with the aeration pipe 3-7 of the downstream area, and the bottom of the downstream area is provided with a baffle plate 3-8. The vertical section of the flow plate 3-8 is trumpet-shaped; the upper flow area 3-2 is located on the periphery of the lower flow area 3-1 and the upper part of the baffle, the middle of the upper flow area is provided with an upper flow area filler 3-9, and the lower part is provided with an upper flow area. District aeration pipe, the outlet of the upper part of the upstream area is provided with a baffle type aerated biochemical filter overflow weir 3-10; the sludge area 3-3 is located at the bottom of the baffled type aerated biochemical filter, the downstream area and A sludge discharge valve 3-11 is provided at the bottom of the upstream zone and at the bottom of the sludge zone.

The quicksand filter 4 includes a quicksand filter inlet pipe 4-1 and a quicksand filter outlet pipe for discharging treated water, and the quicksand filter includes a water distribution area, a sand washing area and a sand filter area; The water distribution area is located in the lower part of the quicksand filter, and the water distribution area is provided with a quicksand filter water distribution pipe 4-2, and the quicksand filter water distribution pipe 4-2 is connected to the quicksand filter inlet pipe 4-1, so that the effect of wastewater treatment is better , the quicksand filter water distribution pipe 4-2 is arranged in the shape of concentric circles, and the quicksand filter water distribution pipe has a downward radiating water outlet; the described sand washing area is located in the center of the quicksand filter and is a cylindrical tubular structure , the lower opening of the cylindrical cylindrical structure is located at the bottom of the quicksand filter, the upper opening of the cylindrical cylindrical structure is located at the upper part of the quicksand filter, and the middle part of the sand washing area is provided with an air lift pipe 4-3, and an air lift pipe 4-3 Connect the quicksand filter blower 4-4 outside the quicksand filter. The upper part of the sand washing area is provided with a sand-water sedimentation separation area. The upper part of the sand-water sedimentation separation area is equipped with a sand washing area overflow weir 4-5. 4-5 Connect the sand washing water discharge pipe and the baffle type aerated biochemical filter inlet pipe 3-4, and the lower part of the sand-water sedimentation separation area is provided with a sand return channel 4-6; the sand filter area is located in the sand washing area The sand filter area is filled with fine sand, the upper part of the sand filter area is provided with a sand filter area overflow weir 4-7, and the sand filter area overflow weir 4-7 is connected to the outlet pipe of the quicksand filter, and the water after the quick sand filter is filtered Enter the clear water pool for reuse.

A method for wastewater treatment using the above-mentioned refinery wastewater advanced treatment device has the following steps:

①Wastewater enters the wastewater regulating tank through the inlet pipe of the wastewater regulating tank to adjust the water quality and quantity.

② Then the waste water enters the middle and lower part of the high-efficiency air flotation tank through the inlet pipe 1-1 of the high-efficiency air flotation tank; the aeration disc 1-6 of the high-efficiency air flotation tank located below the water inlet pipe of the high-efficiency air flotation tank produces a large number of fine air bubbles, and the aeration disc 1-6 of the high-efficiency air flotation tank 6. The fine air bubbles produced adhere to the slick oil and scum to form a mixture that rises under the action of buoyancy. Under the action of the three-phase separator 1-8 in the high-efficiency air flotation tank, the mixture rises to the oil and slag collection area 1-5, Under the action of the oil residue scraper 1-10, the slick oil and scum enter the oil residue tank 1-11 and are cleaned and transported; the separated water enters the high-efficiency air flotation tank under the action of the deflector in the three-phase separation area of the high-efficiency air flotation tank. The water collection area 1-4 of the air flotation tank enters the water inlet pipe 2-5 of the advanced oxidation tank through the overflow weir 1-9 of the high-efficiency air flotation tank and the outlet pipe of the high-efficiency air flotation tank.

③Wastewater enters the middle and lower part of the advanced oxidation tank 2 through the water inlet pipe 2-5 of the advanced oxidation tank and the water distribution branch pipe 2-4 of the advanced oxidation tank; the ozone aeration plate 2-3 located below the water distribution branch pipe of the advanced oxidation tank produces a large number of fine air bubbles Oxidize the macromolecular substances in the wastewater into small molecular substances that are easy to absorb and absorb, and the oxidized and decomposed wastewater enters the wastewater flow channel in the sedimentation area, and the three-phase separator 2-9 in the advanced oxidation tank realizes solid-liquid separation; Under the action of gravity, it sinks to the lower part of the sedimentation zone 2-2 of the advanced oxidation tank, and is discharged through the sediment discharge valve 2-11 at the bottom; the waste water enters the baffle type through the overflow weir 2-10 of the advanced oxidation tank and the outlet pipe of the advanced oxidation tank. Aerated biochemical filter inlet pipe 3-4.

④Wastewater enters the downstream area 3-1 of the baffled aerated biochemical filter through the water inlet pipe 3-4 of the baffled aerated biochemical filter and the water distribution pipe 3-5 of the baffled aerated biochemical filter, and the downstream area is aerated The air generated by the pipe 3-7 and the waste water meet in the filler 3-6 in the downstream area to undergo a biochemical reaction. At the same time, the filler 3-6 in the downstream area filters the waste water, and the waste water enters the upstream area 3-2 after passing through the baffle plate 3-8. The biochemical reaction occurs in the packing 3-9 in the upstream area, and at the same time, the packing 3-9 in the upstream area filters the waste water, and the sludge produced in the downstream area and the upstream area sinks to the sludge area 3-3, and passes through the sludge at the bottom of the sludge area. The mud discharge valve 3-11 is discharged, and the water after the baffle type aerated biochemical filter is processed enters the quicksand filter water inlet pipe through the baffle type aerated biochemical filter overflow weir 3-10.

⑤ The waste water enters the lower part of the quicksand filter through the water inlet pipe 4-1 of the quicksand filter and the water distribution pipe 4-2 of the quicksand filter. The material is further filtered, and then the waste water passes through the sand filter area, and enters the clear water pool for reuse by the overflow weir 4-7 of the sand filter area and the outlet pipe of the quicksand filter; The sand and water flow upwards and wash the sand at the same time, and then the sand and water enter the sand-water sedimentation and separation area. Due to the different specific gravity of the sand and water, the fine sand settles down and flows into the sand filter area through the sand return channel 4-6 to realize sand filtration. The fine sand in the filter area moves continuously from top to bottom, and the water in the sand-water sedimentation separation area passes through the overflow weir 4-5 in the sand washing area and the sand washing water discharge pipe into the baffled aerated biochemical filter for further treatment.

⑥ The sediment produced in the advanced oxidation tank 2 and the sludge produced in the baffle type aerated biochemical filter 3 are concentrated and dehydrated before being transported outside.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (1)

1. a refinery(waste) water advanced treatment apparatus, is characterized in that: comprise wastewater equalization pond, efficient air-floatingPond (1), advanced oxidation pond (2), the biochemical filter tank of baffling aeration (3), quicksand filter tank (4) and clear water reserviors;

Described wastewater equalization pond comprises wastewater equalization pond water inlet pipe and wastewater equalization pond outlet pipe, for regulatingThe water quality of waste water and the water yield;

Described efficient air-floating pond (1) comprises efficient air-floating pond water inlet pipe (1-1) and after treatment for dischargingThe efficient air-floating pond outlet pipe of water, described efficient air-floating pond is followed successively by from bottom to up mixed zone (1-3) and separatesDistrict; Described Disengagement zone comprises gathering ground (1-4) and is positioned at the oil-collecting Ji Zhaqu (1-5) of gathering ground; DescribedThe top of the mixed zone (1-3) in efficient air-floating pond is provided with efficient air-floating pond aeration plate (1-6), and described is efficientThe top of flotation tank aeration plate is provided with efficient air-floating pond water distribution branch pipe (1-2), and described efficient air-floating pond water distribution props upPipe connects efficient air-floating pond water inlet pipe (1-1), and described efficient air-floating pond aeration plate (1-6) is connected with efficient airEfficient air-floating pond air blast (1-7) outside floating pond; In described Disengagement zone, be provided with efficient air-floating pond three phase separator(1-8), described efficient air-floating pond three phase separator (1-8) comprises deflector and is positioned at deflector below and leadsThe triangle guide ring that stream plate is used in conjunction with, described triangle guide ring is arranged on the inwall in efficient air-floating pond,The top of described deflector is identical with the shape of Disengagement zone, and the bottom of described deflector is horn-like, instituteThe internal diameter of the bottom of the deflector of stating is greater than the internal diameter of triangle guide ring; Establish on the top of described Disengagement zone outer wallThere is efficient air-floating pond overfalling weir (1-9), described efficient air-floating pond overfalling weir (1-9) and the water outlet of efficient air-floating pondPipe is connected; Described oil-collecting Ji Zhaqu (1-5) is laid with dregs of fat scraper plate (1-10) and crackling receiving tank (1-11); Waste waterWhile overflowing from the bottom up, water, oil enter the bottom of deflector together with scum silica frost by triangle guide ring, and oil is with floatingSlag continues up to enter oil-collecting Ji Zhaqu (1-5), and water enters by the gap between deflector and triangle guide ringGathering ground (1-4); For the better effects if of wastewater treatment, establish in described efficient air-floating pond water distribution branch pipe (1-2)Be set to concentric circles or cross shape, on the water distribution branch pipe of efficient air-floating pond, there is horizontal radiation delivery port; EnterOne step, described efficient air-floating pond aeration plate is the pore type aeration plate that is evenly provided with micropore;

Described efficient air-floating pond outlet pipe is communicated with advanced oxidation pond water inlet pipe (2-5);

Described advanced oxidation pond (2) comprises aeration zoneofoxidation (2-1) and settling zone (2-2), at the bottom of aeration zoneofoxidationPortion is provided with ozonation aerated dish (2-3), and the top of described ozonation aerated dish is provided with advanced oxidation pond water distribution branch pipe(2-4), described advanced oxidation pond water distribution branch pipe (2-4) connects advanced oxidation pond water inlet pipe (2-5), describedOzonation aerated dish (2-3) is connected with the ozone air blast (2-6) outside advanced oxidation pond, and ozone air blast is by pipeRoad is communicated with ozone generator (2-7); In described settling zone, be provided with baffle plate (2-8), in this baffle plate and sedimentation basinWall forms the waste water runner that enters settling zone as waste water, and the exit of settling zone is provided with advanced oxidation pond three-phaseSeparator (2-9), the outlet top of settling zone is provided with advanced oxidation pond overfalling weir (2-10), and establish bottom, settling zoneCount tapered structure, be provided with sediment discharge valve (2-11) in bottom, settling zone;

The middle and upper part in the biochemical filter tank of described baffling aeration (3) is that cylindrical, bottom is conical structure, bagDraw together lower current area (3-1), ascending zone (3-2) and mud district (3-3); Described lower current area (3-1) is positioned at foldingThe middle part of the cylindrical structural in streaming aeration biochemical filter tank, is cylindrical structural, and lower current area top is provided with bafflingThe biochemical filter tank water distributor of formula aeration biochemical filter tank water inlet pipe (3-4) and baffling aeration (3-5), in lower current areaPortion is provided with lower current area filler (3-6), and lower current area bottom is provided with lower current area aeration tube (3-7), described lower current areaBottom be provided with deflection plate (3-8), the vertical section of described deflection plate (3-8) is horn-like; Described upper reachesDistrict (3-2) is positioned at the periphery of lower current area (3-1), the top of deflection plate, and ascending zone middle part is provided with ascending zoneFiller (3-9), bottom is provided with ascending zone aeration tube, and it is raw that the exit on ascending zone top is provided with baffling aerationChange filter tank overfalling weir (3-10); Described mud district (3-3) be positioned at the biochemical filter tank of baffling aeration bottom,The bottom of lower current area and ascending zone, the bottom in mud district is provided with mud discharging valve (3-11);

Described quicksand filter tank (4) comprises quicksand filter tank water inlet pipe (4-1) and for discharging water after treatmentQuicksand filter tank outlet pipe, described quicksand filter tank comprises cloth pool, washed-out sand district and sand filtration district; Described water distributionDistrict is positioned at the bottom in quicksand filter tank, and cloth pool is provided with quicksand filter tank water distributor (4-2), quicksand filter tank water distributor(4-2) connect quicksand filter tank water inlet pipe (4-1), for the better effects if of wastewater treatment, described quicksand filterPond water distributor (4-2) is arranged to concentric circles, on the water distributor of quicksand filter tank, has downward radiation delivery port;Described washed-out sand district is positioned at the center in quicksand filter tank, is cylindrical tubular structure, cylindrical tubular structure lower endOpening is positioned at the bottommost in quicksand filter tank, and cylindrical tubular structure upper end open is positioned at the top in quicksand filter tank,The middle part in washed-out sand district is provided with stripping tube (4-3), and stripping tube (4-3) connects the quicksand filter tank drum outside quicksand filter tankBlower fan (4-4), the top in washed-out sand district is provided with sand water sedimentation Disengagement zone, and the top of sand water sedimentation Disengagement zone is provided withWashed-out sand district overfalling weir (4-5), washed-out sand district overfalling weir (4-5) connects washed-out sand water discharge spout and baffling aeration is rawChange filter tank water inlet pipe (3-4), the bottom of sand water sedimentation Disengagement zone is provided with back sand passage (4-6); Described sandFilter district is positioned at the periphery in washed-out sand district, and sand filtration is filled with fine sand in district, and top, sand filtration district is provided with sand filtration district overfalling weir(4-7), sand filtration district overfalling weir (4-7) connects quicksand filter tank outlet pipe, quicksand filter water after treatmentEnter clear water reserviors reuse.