Petrochemical production wastewater treatment system based on anaerobic biochemical treatment technology

Abstract

The utility model discloses a petrochemical production wastewater treatment system based on an anaerobic biochemical treatment technology. The petrochemical production wastewater treatment system comprises a water inlet tank; the biological fluidized bed is configured to adsorb and degrade part of organic matters in the wastewater; the anaerobic tank is configured to degrade part of organic matters in the wastewater; the primary biological aerated filter is configured to degrade part of organic matters in the wastewater and intercept suspended solids in the wastewater; the ozone generator is used for introducing ozone into the lower part of the primary biological aerated filter; the air blower aerates the lower part of the primary biological aerated filter; and the clean water tank can be communicated with the biological fluidized bed and the primary aeration biological filter tank through a flushing pipeline and is used for discharging wastewater. The treatment system can adsorb and degrade organic matters in the wastewater, reduce the toxicity of the wastewater and intercept suspended solids in the wastewater, so that the purpose of removing the organic matters and various harmful pollutants is achieved, and the wastewater reaching the standard is discharged.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment system for petrochemical production. Background Technology

[0002] Wastewater from petrochemical storage and production mainly consists of wastewater from cleaning pipelines and storage tanks. This wastewater contains a wide variety of organic matter, with a significant proportion being substances that are difficult to biodegrade. The wastewater is also highly toxic, making direct anaerobic biological treatment challenging. With continuously increasing wastewater discharge standards, conventional wastewater treatment systems are no longer sufficient to meet the demands. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a wastewater treatment system for petrochemical production, capable of effectively removing organic matter from wastewater.

[0004] A petrochemical wastewater treatment system based on anaerobic biochemical treatment technology, according to an embodiment of this utility model, includes: an inlet tank for collecting wastewater; a biological fluidized bed connected to the inlet tank via a sewage pipe at its lower part, the biological fluidized bed being configured to adsorb and degrade some organic matter in the wastewater; an anaerobic tank connected to the biological fluidized bed via a sewage pipe, the anaerobic tank being configured to degrade some organic matter in the wastewater; and a primary aerated biological filter connected to the anaerobic tank via a sewage pipe at its lower part, the primary aerated biological filter being configured to degrade some organic matter in the wastewater... The system includes: a filter for intercepting suspended solids in wastewater; an ozone generator connected to the lower part of the primary aerated biological filter via an ozone pipeline, which supplies ozone to the lower part of the primary aerated biological filter; a blower connected to the lower part of the primary aerated biological filter via an air pipeline, which aerates the lower part of the primary aerated biological filter; and a clear water tank connected to the upper part of the primary aerated biological filter via a sewage pipeline. The clear water tank is connected to the biological fluidized bed and the primary aerated biological filter via a flushing pipeline and is used for discharging wastewater.

[0005] The system has at least the following beneficial effects: Based on anaerobic biochemical treatment technology, the wastewater in the influent tank is first treated by a biological fluidized bed, which adsorbs and degrades some of the organic matter in the wastewater, reducing its toxicity. Then, it is further treated by an anaerobic tank to remove biodegradable organic matter. A blower aerates the lower part of the primary aerated biological filter, while an ozone generator introduces ozone into the lower part of the primary aerated biological filter. Under the strong oxidizing effect of ozone, the aerated biological filter can degrade the recalcitrant organic matter in the wastewater and also retain suspended solids, achieving the purpose of removing organic matter and various harmful pollutants. Finally, the wastewater flows into the clear water tank, achieving the discharge of compliant wastewater. The clear water tank can also periodically backwash the biological fluidized bed and the primary aerated biological filter to remove pollutants and detached biofilm from each filter layer.

[0006] According to some embodiments of this utility model, it also includes a biological deodorization tower, wherein a first sealing cover is provided on the upper part of the water inlet pool, and the biological deodorization tower is connected to the first sealing cover through an exhaust gas pipeline.

[0007] According to some embodiments of this utility model, a second sealing cover is provided at the top of the anaerobic tank, and the biological deodorization tower is connected to the second sealing cover through an exhaust gas pipeline.

[0008] According to some embodiments of the present invention, it also includes an exhaust fan and a chimney. The exhaust fan is connected to the biological deodorization tower through an exhaust gas pipeline to extract gas from the biological deodorization tower, and the exhaust fan is connected to the chimney through an exhaust gas pipeline to output gas to the chimney.

[0009] According to some embodiments of this utility model, two sets of anaerobic tanks are arranged sequentially along the sewage pipeline.

[0010] According to some embodiments of this utility model, a secondary aerated biological filter is provided between the clear water tank and the upper part of the primary aerated biological filter via a sewage pipe. The lower part of the secondary aerated biological filter is connected to the upper part of the primary aerated biological filter via a sewage pipe. The clear water tank is connected to the upper part of the secondary aerated biological filter via a sewage pipe. The blower is connected to the lower part of the secondary aerated biological filter via an air pipe to aerate the lower part of the secondary aerated biological filter. The clear water tank can be connected to the secondary aerated biological filter via a flushing pipe. The secondary aerated biological filter is configured to degrade some organic matter in the wastewater and intercept suspended solids in the wastewater.

[0011] According to some embodiments of this utility model, the clear water tank discharges wastewater through a drainage pipe, and a metering channel is provided on the drainage pipe.

[0012] According to some embodiments of this utility model, the wastewater includes industrial wastewater, intercepted rainwater, and domestic sewage.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Reference numerals in the attached diagram: 1. Inlet tank; 101. First sealing cover; 2. Biological fluidized bed; 3. Anaerobic tank; 301. Second sealing cover; 4. Primary aerated biological filter; 5. Ozone generator; 6. Blower; 7. Secondary aerated biological filter; 8. Clear water tank; 9. Biological deodorization tower; 10. Exhaust fan; 11. Chimney; 12. Metering channel; 13. Sewage pipeline; 14. Ozone pipeline; 15. Air pipeline; 16. Flushing pipeline; 17. Exhaust gas pipeline; 18. Water pump; 19. Drainage pipeline. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, inside, outside, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, the terms "first," "second," "primary," and "secondary" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or the order of the technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Reference Figure 1 This utility model discloses a wastewater treatment system for petrochemical production based on anaerobic biochemical treatment technology, including an inlet tank 1, a biological fluidized bed 2, an anaerobic tank 3, a primary aerated biological filter 4, an ozone generator 5, a blower 6, and a clear water tank 8.

[0022] The inlet pool 1 is used to collect wastewater and mix various types of wastewater. The lower part of the biological fluidized bed 2 is connected to the inlet pool 1 through the sewage pipe 13. The inlet pool 1 transports wastewater to the biological fluidized bed 2. The biological fluidized bed 2 treatment technology is a biofilm treatment technology that uses fluid to fluidize solid particles or biological particles on the surface where microorganisms grow, and at the same time removes and degrades organic pollutants. It can adsorb and degrade some organic matter in wastewater and reduce the toxicity of wastewater.

[0023] Reference Figure 1 Anaerobic tank 3 is connected to biological fluidized bed 2 through sewage pipe 13. Wastewater treated by biological fluidized bed 2 flows into anaerobic tank 3. Anaerobic tank 3 performs anaerobic biochemical treatment on wastewater. The anaerobic degradation process of high molecular weight organic matter can be divided into four stages: hydrolysis stage, fermentation stage, acetic acid production stage and methanogenesis stage.

[0024] Hydrolysis can be defined as the process by which complex, non-soluble polymers are converted into simple soluble monomers or dimers; fermentation can be defined as the biodegradation process in which organic compounds act as both electron acceptors and electron donors, during which soluble organic matter is converted into end products, mainly volatile fatty acids, hence this stage is also called the acidification stage; under the action of hydrogen-producing and acetic acid-producing bacteria, the products of the previous stage are further converted into acetic acid, hydrogen, carbonic acid, and new cell material; finally, acetic acid, hydrogen, carbonic acid, formic acid, and methanol are converted into methane, carbon dioxide, and new cell material.

[0025] Therefore, anaerobic tank 3 can degrade some organic matter in wastewater, further remove biodegradable organic matter in wastewater, and the hydrolysis and fermentation stages can also have a certain digestion effect on biochemical sludge, reducing the amount of residual sludge to a certain extent.

[0026] Reference Figure 1 The lower part of the primary aerated biological filter 4 is connected to the anaerobic tank 3 through the sewage pipe 13. The anaerobic tank 3 supplies wastewater to the primary aerated biological filter 4. The blower 6 is connected to the lower part of the primary aerated biological filter 4 through the air pipe 15. The ozone generator 5 is connected to the lower part of the primary aerated biological filter 4 through the ozone pipe 14.

[0027] Blower 6 aerates the lower part of the primary aerated biological filter 4 to increase oxygen levels. At the same time, ozone generator 5 introduces ozone into the lower part of the primary aerated biological filter 4, which mixes to form ozonated air. Under the strong oxidizing effect of ozone, the primary aerated biological filter 4 can degrade some organic matter in the wastewater and also retain suspended solids in the wastewater, thereby achieving the purpose of removing organic matter and various harmful pollutants.

[0028] It is understandable that ozone catalysts can be filled into the primary aerated biological filter 4 to improve the oxidation efficiency of ozone, reduce the treatment cost of wastewater, and form an integrated ozone-aerated biological filter. Filter packing can also be placed in the primary aerated biological filter 4 as a biological support medium, allowing the microorganisms growing on the filter packing to fully contact the wastewater for further biodegradation.

[0029] Reference Figure 1 The clear water tank 8 is connected to the upper part of the primary aerated biological filter 4 through the sewage pipe 13. The wastewater treated by the primary aerated biological filter 4 flows into the clear water tank 8. Wastewater that meets the qualified standards can be discharged directly. If it does not meet the standards, the wastewater in the clear water tank 8 can be transported back to the inlet tank 1 for recycling.

[0030] In addition, the clear water tank 8 is connected to the biological fluidized bed 2 and the primary aerated biological filter 4 through the flushing pipe 16. The clear water tank 8 can also backwash the biological fluidized bed 2 and the primary aerated biological filter 4 periodically to remove pollutants and detached biofilm trapped in each filter layer.

[0031] This treatment system is based on anaerobic biological treatment technology and can effectively remove organic matter from wastewater.

[0032] Reference Figure 1 The inlet pool 1 generates a significant amount of waste gas. In some embodiments, a first sealing cover 101 is installed at the top of the inlet pool 1. The first sealing cover 101 prevents the waste gas from escaping directly to the external environment, serving as a sealed collection point. This treatment system also includes a biological deodorization tower 9, which is connected to the first sealing cover 101 via a waste gas pipeline. The biological deodorization tower 9 can introduce the waste gas from the first sealing cover 101 and perform deodorization treatment, ensuring the waste gas meets emission standards and achieving the goal of improving the surrounding environment.

[0033] The anaerobic tank 3 also generates a significant amount of waste gas. In some embodiments, a second sealing cover 301 is installed at the top of the anaerobic tank 3. The second sealing cover 301 prevents the waste gas from escaping directly into the external environment, serving as a sealed collection point. The biological deodorization tower 9 is connected to the second sealing cover 301 via a waste gas pipeline. The biological deodorization tower 9 can introduce the waste gas from the second sealing cover 301 and perform deodorization treatment, ensuring that the waste gas meets emission standards and achieving the goal of improving the surrounding environment.

[0034] Two sets of anaerobic tanks 3 can be arranged sequentially along the sewage pipeline 13. The two sets of anaerobic tanks 3 can increase the degree of degradation. A second sealing cover 301 is provided on the upper part of both sets of anaerobic tanks 3.

[0035] It should be noted that the biological deodorization tower 9 can be equipped with an atomizing spray pipe at the top and a packing material at the bottom. The exhaust gas pipeline enters from the bottom of the biological deodorization tower 9, so that the exhaust gas can fully contact the atomized spray liquid. The malodorous components in the exhaust gas dissolve in the spray liquid, and the spray liquid can fully contact the packing material. The packing material is a carrier of microorganisms. Through biodegradation reaction, the pollution concentration can reach the emission standard.

[0036] In some embodiments, refer to Figure 1 The treatment system also includes an exhaust fan 10 and a chimney 11. The exhaust fan 10 is connected to the upper part of the biological deodorization tower 9 through the exhaust gas pipeline 17 to extract the gas inside the biological deodorization tower 9 and create a slightly negative pressure state inside the biological deodorization tower 9. It can continuously extract the exhaust gas inside the first sealing cover 101 and the second sealing cover 301 through the exhaust gas pipeline 17. The exhaust fan 10 is connected to the chimney 11 through the exhaust gas pipeline 17 to output gas to the chimney 11.

[0037] In some embodiments, refer to Figure 1 A secondary aerated biological filter 7 is installed between the upper part of the clear water tank 8 and the primary aerated biological filter 4 via a sewage pipe 13. The lower part of the secondary aerated biological filter 7 is connected to the upper part of the primary aerated biological filter 4 via the sewage pipe 13. The clear water tank 8 is connected to the upper part of the secondary aerated biological filter 7 via the sewage pipe 13. The wastewater treated by the primary aerated biological filter 4 flows into the secondary aerated biological filter 7 for further treatment. The wastewater treated by the secondary aerated biological filter 7 then flows into the clear water tank 8.

[0038] Among them, the blower 6 is connected to the lower part of the secondary aerated biological filter 7 through the air pipe 15 to aerate the lower part of the secondary aerated biological filter 7 and achieve the function of oxygenation. The secondary aerated biological filter 7 can further degrade some organic matter in the wastewater and intercept suspended solids in the wastewater, integrating biodegradation, filtration and adsorption.

[0039] In addition, the clear water tank 8 can be connected to the secondary aerated biological filter 7 through the flushing pipe 16. The clear water tank 8 can periodically backwash the secondary aerated biological filter 7 to remove pollutants and detached biofilm trapped in each filter layer.

[0040] Reference Figure 1 In some embodiments, the clear water tank 8 discharges wastewater through a drainage pipe 19, which is equipped with a metering channel 12 that can measure the discharge flow rate of the wastewater.

[0041] In addition, a water pump 18 can be installed on each sewage pipeline 13 to provide power for transporting wastewater.

[0042] In some embodiments, the wastewater may include not only industrial wastewater but also intercepted rainwater and domestic sewage. The industrial wastewater and intercepted rainwater may contain mineral oil. A collection tank and an oil removal device can be installed at the front end of the inlet tank. The industrial wastewater and intercepted rainwater are first mixed in the collection tank and then pretreated by the oil removal device to recover the floating oil in the industrial wastewater and intercepted rainwater, thereby reducing the organic load of subsequent treatment. The oil-removed industrial wastewater and intercepted rainwater then enter the inlet tank and are mixed with domestic sewage.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A petrochemical wastewater treatment system based on anaerobic biochemical treatment technology, characterized in that, The application relates to a wastewater treatment system, comprising: a water inlet tank for collecting wastewater; a biological fluidized bed connected to the water inlet tank through a sewage pipeline, the biological fluidized bed being configured to adsorb and degrade part of organic matters in the wastewater; an anaerobic tank connected to the biological fluidized bed through a sewage pipeline, the anaerobic tank being configured to degrade part of organic matters in the wastewater; a primary aerated biological filter tank connected to the anaerobic tank through a sewage pipeline, the primary aerated biological filter tank being configured to degrade part of organic matters in the wastewater and intercept suspended solids in the wastewater; an ozone generator connected to the lower part of the primary aerated biological filter tank through an ozone pipeline, the ozone generator being configured to introduce ozone into the lower part of the primary aerated biological filter tank; an air blower connected to the lower part of the primary aerated biological filter tank through an air pipeline, the air blower being configured to aerate the lower part of the primary aerated biological filter tank; a clean water tank connected to the upper part of the primary aerated biological filter tank through a sewage pipeline, the clean water tank being capable of being connected to the biological fluidized bed and the primary aerated biological filter tank through a flushing pipeline, and the clean water tank being configured to discharge wastewater.

2. The petrochemical wastewater treatment system based on anaerobic biochemical treatment technology according to claim 1, characterized in that, The wastewater treatment system further comprises a biological deodorization tower, the upper part of the water inlet tank is provided with a first sealing cover, and the biological deodorization tower is connected to the first sealing cover through a waste gas pipeline.

3. The petrochemical wastewater treatment system based on anaerobic biochemical treatment technology according to claim 2, characterized in that, The upper part of the anaerobic tank is provided with a second sealing cover, and the biological deodorization tower is connected to the second sealing cover through a waste gas pipeline.

4. The petrochemical wastewater treatment system based on anaerobic biochemical treatment technology according to claim 2 or 3, characterized in that, The wastewater treatment system further comprises an air extractor and a chimney, the air extractor is connected to the biological deodorization tower through a waste gas pipeline to extract gas in the biological deodorization tower, and the air extractor is connected to the chimney through a waste gas pipeline to output gas to the chimney.

5. The petrochemical wastewater treatment system based on anaerobic biochemical treatment technology according to claim 4, characterized in that, The anaerobic tank is provided with two groups of the biological deodorization tower along the sewage pipeline.

6. The petrochemical wastewater treatment system based on anaerobic biochemical treatment technology according to claim 1, characterized in that, The clean water tank and the upper part of the primary aerated biological filter tank are provided with a secondary aerated biological filter tank through a sewage pipeline, the lower part of the secondary aerated biological filter tank is connected to the upper part of the primary aerated biological filter tank through a sewage pipeline, the clean water tank is connected to the upper part of the secondary aerated biological filter tank through a sewage pipeline, an air blower is connected to the lower part of the secondary aerated biological filter tank through an air pipeline to aerate the lower part of the secondary aerated biological filter tank, and the clean water tank is capable of being connected to the secondary aerated biological filter tank through a flushing pipeline, the secondary aerated biological filter tank being configured to degrade part of organic matters in the wastewater and intercept suspended solids in the wastewater.

7. The petrochemical wastewater treatment system based on anaerobic biochemical treatment technology according to claim 1, characterized in that, The clean water tank discharges wastewater through a drainage pipeline, and a metering channel is arranged on the drainage pipeline.

8. The petrochemical wastewater treatment system based on anaerobic biochemical treatment technology according to claim 1, characterized in that, The wastewater comprises production wastewater, sewage rainwater and domestic sewage.

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