System for deeply treating petrochemical wastewater through ozone oxidation coupled biological filter

Abstract

The utility model discloses a system for deeply treating petrochemical wastewater by an ozone oxidation coupled biological filter. Relates to the technical field of wastewater treatment, and comprises an adjusting tank, an oil separation tank, an air floatation tank and an A / O integrated biochemical treatment tank, the adjusting tank is communicated with the oil separation tank, one end, far away from the adjusting tank, of the oil separation tank is communicated with the air floatation tank, and one end, far away from the oil separation tank, of the air floatation tank is communicated with the A / O integrated biochemical treatment tank; an ozone oxidation / biological filter coupling assembly is arranged at one end, far away from the air floatation tank, of the A / O integrated biochemical treatment tank; the ozone oxidation / biological filter coupling assembly comprises a biological filter, an air compressor and an ozone generator, the biological filter is communicated with the A / O integrated biochemical treatment tank, and the air compressor and the ozone generator are both communicated with the biological filter. According to the utility model, the ozone generator and the biological filter are arranged to carry out coupling reaction of ozone oxidation and microbial biochemistry, so that organic pollutants in water are fully degraded, the treatment effect is ensured, and the ozone utilization efficiency is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and more specifically to an ozone oxidation coupled biological filter deep treatment system for petrochemical wastewater. Background Art

[0002] The petrochemical industry is one of China's important industrial sectors, covering multiple industries such as petroleum refining, organic chemical raw material manufacturing, chemical synthesis, dye manufacturing, and organic pesticide manufacturing, involving many products. The petrochemical wastewater discharged by this industry contains a variety of toxic and harmful substances such as petroleum, benzene, polycyclic aromatic hydrocarbons, nitriles, and organic chlorine. It is a typical difficult-to-degrade industrial wastewater, and it is difficult to achieve standard discharge with a single treatment process. The processes commonly used in domestic petrochemical enterprises for petrochemical wastewater treatment are: pre-treatment by methods such as oil separation, flotation, and hydrolysis and acidification, followed by secondary biological treatment.

[0003] However, the existing traditional treatment technology is difficult to reduce COD to below the emission limit of 60mg / L stipulated in the new standard. It is necessary to add deep treatment units and conduct deep treatment of the park wastewater.

[0004] Therefore, how to provide an ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater that can deeply treat park wastewater and make the effluent meet ultra-clean emission standards is an urgent problem that technical personnel in this field need to solve. Utility Model Content

[0005] In view of this, the utility model provides an ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater, which can deeply treat the wastewater in the industrial park and make the effluent meet the ultra-clean emission standard.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater, comprising:

[0008] A regulating tank, a grease trap, an air flotation tank and an A / O integrated biochemical treatment tank, wherein the regulating tank is connected to the grease trap, an end of the grease trap away from the regulating tank is connected to the air flotation tank, an end of the air flotation tank away from the grease trap is connected to the A / O integrated biochemical treatment tank, and an ozone oxidation / biofilter coupling component is arranged at one end of the A / O integrated biochemical treatment tank away from the air flotation tank;

[0009] The ozone oxidation / biofilter coupling assembly includes a biofilter, an air compressor and an ozone generator. The biofilter is connected to one end of the A / O integrated biochemical treatment tank away from the flotation tank, and a return water channel 54 is set between the biofilter and the A / O integrated biochemical treatment tank. The air compressor and the ozone generator are both connected to the biofilter.

[0010] Furthermore, a biological filler area is arranged inside the biological filter tank, and biological fillers are arranged in the biological filler area, and the biological fillers are arranged as 3-5mm porous volcanic rock filter materials.

[0011] Furthermore, an ozone oxidation zone is arranged on one side of the biofilter away from the A / O integrated biochemical treatment tank, the ozone generator is connected to the ozone oxidation zone, and water circulation is performed between the ozone generating zone and the biological filler zone.

[0012] Furthermore, a cushion layer is arranged at the bottom of the biofilter, and the cushion layer is arranged to be gravel.

[0013] Furthermore, it also includes an effluent monitoring pool, which is connected to one end of the biological filter away from the A / O integrated biochemical treatment pool.

[0014] Furthermore, it also includes a tail gas treatment device, which is arranged on the top of the biological filter.

[0015] It can be seen from the above technical scheme that, compared with the prior art, the utility model discloses an ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater, which, by setting an ozone generator and a biofilter to carry out a coupled reaction of ozone oxidation and microbial biochemistry, can fully degrade organic pollutants in the water, thereby ensuring not only the treatment effect but also improving the ozone utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of the ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater provided by the utility model;

[0018] Figure 2 This is a schematic structural diagram of the ozone oxidation / biofilter coupling assembly provided by the utility model.

[0019] Among them: 1 is a regulating tank; 2 is a grease trap; 3 is a flotation tank; 4 is an A / O integrated biochemical treatment tank; 5 is an ozone oxidation / biofilter coupling component; 51 is a biofilter; 52 is an air compressor; 53 is an ozone generator; 54 is a backflow channel; 55 is an exhaust gas treatment device; 6 is an outlet water monitoring tank; 7 is a biological filler area; and 8 is an ozone oxidation area. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-2 The utility model embodiment discloses an ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater:

[0022] It includes a regulating tank 1, a grease trap 2, an air flotation tank 3 and an A / O integrated biochemical treatment tank 4, the regulating tank 1 is connected to the grease trap 2, the end of the grease trap 2 away from the regulating tank 1 is connected to the air flotation tank 3, the end of the air flotation tank 3 away from the grease trap 2 is connected to the A / O integrated biochemical treatment tank 4, and an ozone oxidation / biofilter 51 coupling component 5 is arranged at the end of the A / O integrated biochemical treatment tank 4 away from the air flotation tank 3; the wastewater is subjected to oil separation, air flotation and biochemical treatment through the regulating tank 1, the grease trap 2, the air flotation tank 3 and the A / O integrated biochemical treatment tank 4, so as to reduce the contents of COD and ammonia nitrogen in the effluent;

[0023] The ozone oxidation / biofilter 51 coupling assembly 5 includes a biofilter 51, an air compressor 52 and an ozone generator 53. The biofilter 51 is connected to the end of the A / O integrated biochemical treatment tank 4 away from the flotation tank 3, and a return water channel 54 is set between the biofilter 51 and the A / O integrated biochemical treatment tank 4. The air compressor 52 and the ozone generator 53 are both connected to the biofilter 51. By setting up the biofilter 51, an aeration and mixing effect is achieved, and a circulating flow is generated to cause the wastewater to circulate in the biofilter 51.

[0024] In this embodiment, a biological filler area 7 is set inside the biological filter 51, and a biological filler is set in the biological filler area 7, and the biological filler is set to a 3-5 mm porous volcanic rock filter material; suspended matter and colloids in the water are intercepted and adsorbed by the biological filler and the biofilm on the surface of the filler, and a small amount of biodegradable organic matter is oxidized and decomposed by the microorganisms in the biofilm.

[0025] In this embodiment, an ozone oxidation zone 8 is arranged on one side of the biological filter 51 away from the A / O integrated biochemical treatment tank 4, the ozone generator 53 is connected to the ozone oxidation zone 8, and water circulation is performed between the ozone generating zone and the biological filler zone 7; through the aeration and mixing action of the biological filter 51, a circulating flow is generated to cause the wastewater to circulate in the ozone oxidation zone 8 and the biological filler zone 7, and the wastewater repeatedly passes through the biological filler zone 7 and the ozone oxidation zone 8 under the action of the circulating flow, thereby forming a deep treatment system for the wastewater, which greatly improves the efficiency of the biological filter 51 and ozone used alone, reduces the amount of ozone used, and is green, low-carbon and more environmentally friendly.

[0026] In this embodiment, a cushion layer is provided at the bottom of the biofilter 51, and the cushion layer is provided as gravel.

[0027] In this embodiment, a water outlet monitoring pool 6 is also included, which is connected to the end of the biological filter 51 away from the A / O integrated biochemical treatment pool 4 to monitor the treated water outlet to confirm whether it meets the treatment standards.

[0028] In this embodiment, a tail gas treatment device 55 is further included. The tail gas treatment device 55 is arranged on the top of the biological filter 51 to treat the generated tail gas.

[0029] In addition, in the present embodiment, a partition is provided in the ozone oxidation zone 8, and two partitions are provided, one partition is connected to the bottom of the ozone oxidation zone 8, and the other partition is connected to the top of the ozone oxidation zone 8. The two partitions separate the ozone oxidation zone 8, and the two partitions are respectively spaced from the top and bottom of the ozone oxidation zone 8. The ozone utilization efficiency is improved by providing two partitions.

[0030] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater, characterized in that: It includes a regulating tank, a grease trap, an air flotation tank and an A / O integrated biochemical treatment tank, wherein the regulating tank is connected to the grease trap, an end of the grease trap away from the regulating tank is connected to the air flotation tank, an end of the air flotation tank away from the grease trap is connected to the A / O integrated biochemical treatment tank, and an ozone oxidation / biofilter coupling component is arranged at one end of the A / O integrated biochemical treatment tank away from the air flotation tank; The ozone oxidation / biofilter coupling component includes a biofilter, an air compressor and an ozone generator. The biofilter is connected to one end of the A / O integrated biochemical treatment tank away from the flotation tank, and a return water channel is set between the biofilter and the A / O integrated biochemical treatment tank. The air compressor and the ozone generator are both connected to the biofilter.

2. The ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater according to claim 1 is characterized in that: A biological filler area is arranged inside the biological filter tank, and a biological filler is arranged in the biological filler area, and the biological filler is arranged as a porous volcanic rock filter material of 3-5 mm.

3. The ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater according to claim 2 is characterized in that: An ozone oxidation zone is arranged on one side of the biofilter away from the A / O integrated biochemical treatment tank, the ozone generator is connected to the ozone oxidation zone, and water circulation is performed between the ozone generating zone and the biological filler zone.

4. The ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater according to claim 3 is characterized in that: A cushion layer is arranged at the bottom of the biofilter, and the cushion layer is arranged as gravel.

5. The ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater according to claim 4 is characterized in that: It also includes a water outlet monitoring pool, which is connected to one end of the biological filter away from the A / O integrated biochemical treatment pool.

6. The ozone oxidation coupled biofilter deep treatment system for petrochemical wastewater according to claim 5, characterized in that: It also includes a tail gas treatment device, which is arranged on the top of the biological filter.

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