CN210595676U - Petrochemical effluent disposal system - Google Patents
Petrochemical effluent disposal system Download PDFInfo
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- CN210595676U CN210595676U CN201921016779.0U CN201921016779U CN210595676U CN 210595676 U CN210595676 U CN 210595676U CN 201921016779 U CN201921016779 U CN 201921016779U CN 210595676 U CN210595676 U CN 210595676U
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Abstract
The utility model relates to the technical field of wastewater treatment, in particular to a petrochemical wastewater treatment system, which comprises a pretreatment unit, a biochemical treatment unit and a deepening treatment unit; the pretreatment unit comprises a wastewater adjusting tank, a heat exchange cooling device and an air floatation system, wherein the wastewater adjusting tank lifts wastewater into the heat exchange cooling device through a material pump, and then the wastewater flows automatically into the air floatation system; the biochemical treatment unit comprises an A/O (anoxic/oxic) tank, the A/O tank consists of a facultative tank and an aerobic tank, the deepening treatment unit comprises a secondary sedimentation tank, an ozone contact tank and an aeration biological filter, and wastewater treated by the biochemical treatment unit sequentially and automatically flows into the secondary sedimentation tank, the ozone contact tank and the aeration biological filter through pipelines. The utility model discloses a petrochemical industry industrial waste water is handled to waste water regulation, heat transfer cooling, air supporting deoiling, AO technology, high-efficient sedimentation tank, ozone-BAF's combined system, and the actual quality of water characteristic of petrochemical industry industrial waste water of laminating has very high novelty and suitability, is worth promoting.
Description
Technical Field
The utility model relates to a waste water treatment technical field especially relates to a petrochemical effluent disposal system.
Background
Petrochemical is a series of organic matter processing processes which mainly use petroleum as raw materials and adopt processes such as cracking, refining, fractionation, reforming, synthesis and the like. The petrochemical industry product production process is long, and the apparatus for producing is many, and the sewage water yield that produces is big, contains conventional pollutants such as petroleum, CODCr, ammonia nitrogen, sulphur, phenol, cyanide in typical petrochemical industry sewage. Meanwhile, different enterprises produce different products, and the produced sewage also contains various characteristic pollutants related to organic chemical products of the sewage, such as polycyclic aromatic hydrocarbon compounds, aromatic amine compounds, heterocyclic compounds and the like, so that the sewage is not only complex in water quality, but also rich in toxic substances. In addition, the fluctuation of production such as start-stop, overhaul, change of raw material sources and the like of enterprises can cause the change of the sewage quantity and the content and the property of pollutants, and the impact load of sewage treatment facilities is increased.
The petrochemical industry enterprises can produce high-temperature high-oil-pollution wastewater with the temperature of more than 45 ℃ and the petroleum content of more than 50mg/L due to different products or different production processes, and has an inhibiting effect on microorganisms. In addition, the alkalinity of the waste water is high, the hardness is high, and an aeration system is easy to block.
At present, the common treatment methods for petrochemical wastewater mainly comprise: physical methods such as oil removal, air flotation, adsorption membrane separation, etc.; chemical methods such as flocculation, advanced oxidation, etc.; biological treatment methods, such as anaerobic treatment, aerobic treatment, combined processes, etc., which do not satisfy the current needs, and thus, we propose a petrochemical wastewater treatment system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a petrochemical wastewater treatment system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
designing a petrochemical wastewater treatment system, which comprises a pretreatment unit, a biochemical treatment unit and a deepening treatment unit, wherein the petrochemical wastewater is sequentially treated step by step through the pretreatment unit, the biochemical treatment unit and the deepening treatment unit;
the pretreatment unit comprises a wastewater adjusting tank, a heat exchange cooling device and an air floatation system, wherein the wastewater adjusting tank lifts the wastewater into the heat exchange cooling device through a material pump for cooling, the cooled wastewater automatically flows into the air floatation system through a pipeline for oil removal treatment, and then the wastewater automatically flows into the biochemical treatment unit;
the biochemical treatment unit comprises an A/O (anoxic/oxic) tank and a secondary sedimentation tank, the A/O tank consists of a facultative tank and an aerobic tank, and the wastewater after being treated by the pretreatment unit sequentially and automatically enters the facultative tank, the aerobic tank and the secondary sedimentation tank through pipelines;
the deepening treatment unit comprises a high-efficiency sedimentation tank, an ozone contact tank and a biological aerated filter, and the wastewater treated by the biochemical treatment unit automatically flows into the high-efficiency sedimentation tank, the ozone contact tank and the biological aerated filter in sequence through pipelines.
Preferably, the water regulating tank is also connected with an accident wastewater tank.
Preferably, the heat exchange and temperature reduction device adopts a closed cooling tower.
Preferably, the air flotation system at least comprises four air flotation tanks, the four air flotation tanks are arranged in a gradient manner, the four air flotation tanks are simultaneously provided with serial pipelines and parallel pipelines, and the serial pipelines and the parallel pipelines are positioned at the liquid inlet ends and the liquid outlet ends of the four air flotation tanks and are respectively provided with a first four-way valve and a second four-way valve.
Preferably, an overrunning pipeline is further arranged on a bypass of the air floatation system, and two ends of the overrunning pipeline are respectively connected to the first four-way valve and the second four-way valve.
Preferably, the A/O pool is filled with a biological filler layer.
Preferably, a mud-water mixed liquid backflow system is arranged between the tail end of the aerobic tank and the facultative tank.
Preferably, the secondary sedimentation tank is connected with a sludge pump, the discharge end of the sludge pump is connected with the facultative tank through a three-way valve, and the sludge pump is also connected with a sludge concentration tank.
Preferably, the aerobic tank and the aeration biological filter tank are both provided with blast aeration devices.
Preferably, the biological aerated filter is filled with a ceramic filler layer with high specific surface area.
The utility model provides a petrochemical wastewater treatment system, beneficial effect lies in: the utility model adopts a combined system of wastewater regulation, heat exchange cooling, air flotation oil removal, A/O process, high-efficiency sedimentation tank and ozone-BAF to treat petrochemical industrial wastewater, and is in accordance with the actual water quality characteristics of the petrochemical industrial wastewater, thereby having high innovativeness and applicability;
(1) through the wastewater pretreatment unit, the waste liquid is subjected to heat exchange treatment, so that the microorganism can be effectively prevented from being inhibited, and the system is prevented from being easily blocked after the adverse effect of petroleum on the operation of a biochemical system is reduced through the air floatation system.
(2) The impact resistance of the biochemical system can be improved in a short retention time through the biochemical treatment unit, the COD removal rate is improved, and the sludge yield of the biochemical system is reduced.
(3) SS, colloid and COD in the waste water can be removed through the advanced treatment unit, the residual organic matter difficult to degrade in the waste water is degraded, and the characteristic pollutants such as COD, SS, petroleum and benzene series in the effluent reach the design index, and the effluent is qualified to be removed to a regenerated water system.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a flow chart of the present invention.
Labeled as: the device comprises an accident wastewater tank 1, a wastewater adjusting tank 2, a heat exchange and cooling device 3, a first four-way valve 4, an air flotation tank 5, a series pipeline 6, a parallel pipeline 7, an overrunning pipeline 8, a second four-way valve 9, a facultative tank 10, an aerobic tank 11, a biological packing layer 12, a secondary sedimentation tank 13, an ozone contact tank 14, an aeration biological filter tank 15, a sludge pump 16, a three-way valve 17, a sludge concentration tank 18, a mud-water mixed liquid reflux system 19, a blast aeration device 20, a ceramic packing layer 21 and a high-efficiency sedimentation tank 22.
Detailed Description
The present invention will be further described with reference to the following specific examples. These examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The structural features of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1-2, a petrochemical wastewater treatment system comprises a pretreatment unit, a biochemical treatment unit and a deepening treatment unit, wherein petrochemical wastewater is sequentially treated step by step through the pretreatment unit, the biochemical treatment unit and the deepening treatment unit;
the pretreatment unit comprises a wastewater adjusting tank 2, a heat exchange cooling device 3 and an air floatation system, wherein the wastewater adjusting tank 2 lifts the wastewater into the heat exchange cooling device 3 through a material pump for cooling, the cooled wastewater automatically flows into the air floatation system through a pipeline for oil removal treatment, and then the wastewater automatically flows into the biochemical treatment unit;
the biochemical treatment unit comprises an A/O (anoxic/oxic) tank and a secondary sedimentation tank 13, the A/O tank consists of a facultative tank 10 and an aerobic tank 11, and the wastewater after being treated by the pretreatment unit sequentially and automatically enters the facultative tank 10, the aerobic tank 11 and the secondary sedimentation tank 13 through pipelines;
the deepening treatment unit comprises a high-efficiency sedimentation tank 22, an ozone contact tank 14 and a biological aerated filter 15, and the wastewater treated by the biochemical treatment unit automatically flows into the high-efficiency sedimentation tank 22, the ozone contact tank 14 and the biological aerated filter 15 in sequence through pipelines.
The utility model discloses a petrochemical effluent disposal system, the utility model discloses a petrochemical industrial waste water is handled to waste water regulation, heat transfer cooling, air supporting deoiling, AO technology, high-efficient sedimentation tank, ozone-BAF's combined system, and the actual quality of water characteristic of laminating petrochemical industrial waste water has very high novelty and suitability.
The main advantages of using the ozone oxidation method are rapid reaction, simple process and no secondary pollution. The ozone has strong oxidizing ability, and has large sterilizing and killing power and high speed when being used for sterilizing; toxic and harmful substances such as cyanide, phenol and the like can be oxidized into harmless substances; can oxidize odor and coloring substances, thereby reducing odor and chroma.
The Biological Aerated Filter (BAF) integrates the throttling filtering efficiency of a filtering layer and the strong oxidative degradation capability of a biological membrane, can effectively remove suspended matters and organic matters in sewage, and can also realize nitrification, denitrification, dephosphorization and removal of harmful substances.
Specifically, when the device is used, wastewater firstly enters the wastewater adjusting tank 2 for homogenizing and equalizing, the sewage after homogenizing is lifted to the heat exchange cooling device 3 for cooling, the cooled wastewater automatically flows into the air floatation system for oil removal treatment, the adverse influence of petroleum on the operation of the biochemical system is reduced, then the wastewater automatically flows into the biochemical treatment unit, the A/O biochemical process is adopted, and the wastewater in the wastewater is degraded through the action of anoxic flora and aerobic floraPollutants such as COD; improving the impact resistance of a biochemical system and simultaneously improving the COD removal rate and reducing the sludge yield of the biochemical system under the condition of short retention time, feeding the effluent of the secondary sedimentation tank 13 into a high-density sedimentation tank 22, adding a flocculating agent and a coagulant aid, and further removing SS, colloid and COD in the wastewater under the action of the flocculating agent and the coagulant aid; then enters an ozone contact tank 14 and utilizes O3The selective oxidation of the wastewater can further degrade the residual organic matters which are difficult to degrade in the wastewater, such as petroleum, aromatic hydrocarbons and macromolecular organic matters, improve the biodegradability of the wastewater, reduce the chromaticity of the wastewater, and further enable the characteristic pollutants such as COD, SS, petroleum and benzene series in the effluent to reach the design index under the action of microorganisms in the biological aerated filter 15, so that the effluent is qualified for being used in a regenerated water system.
Referring to fig. 1, further, an accident wastewater tank 1 is connected to the water conditioning tank 2.
The accident wastewater tank 1 is arranged, so that wastewater can be prevented from being cut into the accident wastewater tank 1 to be temporarily stored under abnormal working conditions.
Further, the heat exchange and temperature reduction device 3 adopts a closed cooling tower.
The heat exchange and cooling device 3 adopts a closed cooling tower, so that odor in the cooling tower can be prevented from dissipating in the using process.
Referring to fig. 1, further, the air flotation system is composed of at least four air flotation tanks 5, the four air flotation tanks 5 are arranged in a gradient manner, the four air flotation tanks 5 are simultaneously provided with a series pipeline 6 and a parallel pipeline 7, and the series pipeline 6 and the parallel pipeline 7 are respectively provided with a first four-way valve 4 and a second four-way valve 9 at liquid inlet ends and liquid outlet ends of the four air flotation tanks 5.
Set up series connection pipeline 6 and parallel pipeline 7 in the air supporting system, with the mode of merging into by first cross valve 4 and second cross valve 9, make unit maneuverability stronger like this, to the air supporting system, 4 sets of air supporting devices of at least design can form 2 levels of air supporting of series connection and deal with the high oily waste water of little water yield, also can parallelly connected operation handle the low oily waste water of big water yield.
Referring to fig. 1, further, an overrun pipeline 8 is further disposed on a bypass of the air floatation system, and two ends of the overrun pipeline 8 are respectively connected to the first four-way valve 4 and the second four-way valve 9.
An overrunning pipeline 8 is arranged on a bypass of the air floatation system, and when the content of inlet water oil is low, the outlet water of the wastewater adjusting tank 2 can directly enter a subsequent facultative tank 10 after being cooled, and does not need to enter the air floatation system for oil removal treatment.
Referring to FIG. 1, further, the A/O cells are filled with a bio-filler layer 12.
The biological filler layer 12 is arranged to improve the effective biomass and the abundance of biological flora in the A/O pool, further enhance the degradation efficiency of volatile phenol, acetonitrile and other refractory organic pollutants in the wastewater, improve the impact resistance of the biochemical system in a short retention time, improve the COD removal rate and reduce the sludge yield of the biochemical system.
Referring to fig. 1, further, a sludge-water mixed liquid reflux system 19 is arranged between the tail end of the aerobic tank and the facultative tank 10.
And a mud-water mixed liquid reflux system 19 is arranged to send the digestive liquid back to the anoxic section for denitrification.
Referring to fig. 1 and 2, further, a sludge pump 16 is connected to the secondary sedimentation tank 13, and a discharge end of the sludge pump 16 is connected to the facultative tank 10 through a three-way valve 17, and is also connected to a sludge concentration tank 18.
Referring to fig. 1, further, a blast aeration device 20 is arranged in each of the aerobic tank 11 and the biological aerated filter 15.
Referring to fig. 1, the biological aerated filter 15 is further filled with a ceramic filler layer 21 with a high specific surface area.
The ceramic packing layer 21 is arranged to improve carriers for microbial film growth, wastewater flows through the ceramic packing layer 21 from bottom to top, blast aeration is carried out on the lower part of the ceramic packing layer 21, air is contacted with sewage, organic matters in the sewage and the biofilm on the surface of the packing are degraded through biochemical reaction, the packing plays a role in physical filtration at the same time, and nitrification, denitrification, dephosphorization and removal of harmful substances can also be realized.
Working process; wastewater under normal working conditions firstly enters a wastewater adjusting tank 2 for adjusting the water quantity and equalizing the water quality, and wastewater under abnormal working conditions is cut into an accident wastewater tank 1 for temporary storage; after the wastewater is lifted to the heat exchange and cooling device 3 by the wastewater adjusting tank 2 for cooling treatment, the wastewater automatically flows into the air floatation system for oil removal pretreatment when the concentration of the petroleum pollutants is higher, and directly enters the facultative tank 10 for biochemical treatment when the concentration of the petroleum pollutants is lower without entering the air floatation system. Most of nitrate nitrogen in the mixed liquid returned from the aerobic tank 11 is reduced into nitrogen in the facultative tank 10 under the anoxic environment; the effluent of the facultative tank 10 enters an aerobic tank 11, blast aeration is arranged in the aerobic tank 11, most organic pollutants are removed in an aerobic environment, most ammonia nitrogen in the water is converted into nitrate nitrogen, a mud-water mixed liquid reflux system is arranged at the tail end of the aerobic tank, and the digestive juice is sent back to an anoxic section for denitrification; then the effluent of the aerobic tank 11 enters a secondary sedimentation tank 13 for solid-liquid separation, part of sludge is lifted by a sludge pump 16 and flows back to the facultative tank 10 at the front end, the rest of sludge is discharged to a sludge concentration tank 18, and the sludge entering the sludge concentration tank 18 is subjected to centrifugal dehydration treatment, steam belt type drying treatment and finally outward transportation treatment. The effluent of the secondary sedimentation tank 13 automatically flows into an advanced treatment system, firstly enters a high-efficiency sedimentation tank 22, and SS, colloid and COD in the wastewater are further removed under the action of adding a flocculating agent and a coagulant aid; the effluent automatically flows into an ozone contact tank 14, and ozone is introduced into the ozone contact tank 14 to strongly oxidize organic matters remained in the wastewater, so that the biodegradability of the wastewater is further improved; then enters an aeration biological filter 15(BAF pool), a ceramic filler layer 21 in the aeration biological filter improves carriers for microbial film growth, wastewater flows through a filter material layer from bottom to top, blast aeration is carried out on the lower part of the filter material layer, air is contacted with sewage, organic matters in the sewage and a biological film on the surface of a filler are degraded through biochemical reaction, the filler simultaneously plays a role in physical filtration, nitrification, denitrification, dephosphorization and removal of harmful substances can also be realized, water treated by the aeration biological filter 15 is subsequently required to be sent into a water outlet supervision pool for supervision, and finally the outlet water is qualified to be used for a regeneration water system.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A petrochemical wastewater treatment system comprises a pretreatment unit, a biochemical treatment unit and a deepening treatment unit, and is characterized in that petrochemical wastewater is sequentially treated step by step through the pretreatment unit, the biochemical treatment unit and the deepening treatment unit;
the pretreatment unit comprises a wastewater adjusting tank (2), a heat exchange cooling device (3) and an air floatation system, wherein the wastewater adjusting tank (2) lifts wastewater into the heat exchange cooling device (3) through a material pump for cooling, the cooled wastewater automatically flows into the air floatation system through a pipeline for oil removal treatment, and then the wastewater automatically flows into the biochemical treatment unit;
the biochemical treatment unit comprises an A/O (anoxic/oxic) tank and a secondary sedimentation tank (13), the A/O tank consists of a facultative tank (10) and an aerobic tank (11), and wastewater treated by the pretreatment unit sequentially and automatically enters the facultative tank (10), the aerobic tank (11) and the secondary sedimentation tank (13) through pipelines;
the deepening treatment unit comprises a high-efficiency sedimentation tank (22), an ozone contact tank (14) and a biological aerated filter (15), and the wastewater treated by the biochemical treatment unit sequentially flows into a secondary sedimentation tank (13), the ozone contact tank (14) and the biological aerated filter (15) through pipelines.
2. The petrochemical wastewater treatment system according to claim 1, wherein the water conditioning tank (2) is further connected with an accident wastewater tank (1).
3. The petrochemical wastewater treatment system according to claim 1, wherein the heat exchange and cooling device (3) is a closed cooling tower.
4. The petrochemical wastewater treatment system according to claim 1, wherein the air flotation system comprises at least four air flotation tanks (5), the four air flotation tanks (5) are arranged in a gradient manner, the four air flotation tanks (5) are simultaneously provided with a series pipeline (6) and a parallel pipeline (7), and the series pipeline (6) and the parallel pipeline (7) are respectively provided with a first four-way valve (4) and a second four-way valve (9) at the liquid inlet end and the liquid outlet end of the four air flotation tanks (5).
5. The petrochemical wastewater treatment system according to claim 4, wherein a bypass of the air flotation system is further provided with an overrunning pipeline (8), and two ends of the overrunning pipeline (8) are respectively connected to the first four-way valve (4) and the second four-way valve (9).
6. Petrochemical wastewater treatment system according to claim 1, characterized in that the A/O basin is filled with a bio-filler layer (12).
7. The petrochemical wastewater treatment system according to claim 1, wherein a sludge-water mixture reflux system (19) is provided between the end of the aerobic tank and the facultative tank (10).
8. The petrochemical wastewater treatment system according to claim 1, wherein a sludge pump (16) is connected to the secondary sedimentation tank (13), and a discharge end of the sludge pump (16) is connected to the facultative tank (10) through a three-way valve (17) and is also connected to a sludge concentration tank (18).
9. The petrochemical wastewater treatment system according to claim 1, wherein the aeration biological filter (15) and the aerobic tank (11) are provided with a blast aeration device (20).
10. The petrochemical wastewater treatment system according to claim 1, wherein the biological aerated filter (15) is filled with a ceramic filler layer (21) with a high specific surface area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921016779.0U CN210595676U (en) | 2019-07-02 | 2019-07-02 | Petrochemical effluent disposal system |
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| CN201921016779.0U CN210595676U (en) | 2019-07-02 | 2019-07-02 | Petrochemical effluent disposal system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183064A (en) * | 2019-07-02 | 2019-08-30 | 科盛环保科技股份有限公司 | A kind of petrochemical wastewater processing system |
| CN115432882A (en) * | 2022-07-26 | 2022-12-06 | 中国石油化工股份有限公司 | Short-process closed treatment method for oil refining sewage |
-
2019
- 2019-07-02 CN CN201921016779.0U patent/CN210595676U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183064A (en) * | 2019-07-02 | 2019-08-30 | 科盛环保科技股份有限公司 | A kind of petrochemical wastewater processing system |
| CN115432882A (en) * | 2022-07-26 | 2022-12-06 | 中国石油化工股份有限公司 | Short-process closed treatment method for oil refining sewage |
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