Ship oily water treatment equipment

Abstract

The utility model provides ship oily water treatment equipment, and belongs to the technical field of oily water treatment. The ship oily water treatment equipment comprises an oily water tank connected with oily water, an oil separation sedimentation tank connected with the oily water tank, an air floatation tank connected with the oil separation sedimentation tank, a Fenton oxidation tank connected with the air floatation tank, a coagulative precipitation tank connected with the Fenton oxidation tank, and an A / O tank connected with the coagulative precipitation tank, the secondary sedimentation tank is connected with the A / O tank; and the clean water tank is connected with the secondary sedimentation tank. According to the ship oily water treatment equipment disclosed by the utility model, the pollutant treatment efficiency is improved, so that the emission of the oily water meets related regulations.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil sewage treatment, and particularly relates to a ship oil sewage treatment device. Background Art

[0002] A large amount of oil pollution exists in the engine room oil sewage, ballast water, and tank washing water of oil tankers. The oil-containing sewage has complex components and a high degree of emulsification. Typical pollutants in the oil sewage include fuels, oils, hydraulic fluids, detergents and water-containing films, foaming agents (AFFF), paints, and solvents, etc.

[0003] There are many methods for treating ship oil-containing sewage, including physical, chemical, and biochemical methods, etc. In actual applications, the treatment of ship oil-containing sewage needs to select appropriate treatment technologies or technology combinations according to the specific sewage components, discharge standards, and operating conditions. Currently, the disposal cost of oil sewage is high, and the disposal cost per ton of oil sewage exceeds three thousand yuan, resulting in receiving units being reluctant to receive and treat it, and even direct discharge phenomena occurring. Although there are many treatment methods for oil-containing sewage, there may be problems such as low treatment efficiency or complex operation and maintenance. Summary of the Utility Model

[0004] In view of this, the technical problem to be solved by the utility model is to provide a ship oil sewage treatment device to improve the treatment efficiency of pollutants and make its discharge meet relevant regulations.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a ship oil sewage treatment device, including: an oil sewage tank connected to the oil sewage, an oil separation and sedimentation tank connected to the oil sewage tank, a flotation tank connected to the oil separation and sedimentation tank, a Fenton oxidation tank connected to the flotation tank, a coagulation and sedimentation tank connected to the Fenton oxidation tank, an A / O tank connected to the coagulation and sedimentation tank, a secondary sedimentation tank connected to the A / O tank, and a clean water tank connected to the secondary sedimentation tank.

[0006] Optionally, inclined tube fillers are arranged in the middle of the oil separation and sedimentation tank, and an oil skimming device is arranged on the upper part.

[0007] Optionally, the oil sewage tank is connected to the oil separation and sedimentation tank through a lift pump.

[0008] Optionally, the waste oil separated from the oil sewage tank and the oil separation and sedimentation tank are respectively connected to the waste oil tank.

[0009] Optionally, the flotation tank is connected to a PAC dosing device.

[0010] Optionally, the Fenton oxidation tank is connected to a Fenton reagent dosing device.

[0011] Optionally, the coagulation and sedimentation tank is respectively connected to a PAC dosing device and a pH adjustment device.

[0012] Optionally, the sludge return pipe connecting the A / O tank to the secondary sedimentation tank, and the A / O tank is connected to a blower.

[0013] Optionally, the scum and sludge generated by the oil separation and sedimentation tank, the scum generated by the air flotation tank, the sludge generated by the coagulation sedimentation tank, and the sludge generated by the secondary sedimentation tank are respectively connected to a sludge tank.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In view of the characteristics of large fluctuations in the water quality and quantity of ship oily sewage in this project, high and fluctuating sulfur and chlorine content, high and fluctuating petroleum content, etc., the present utility model adopts a specific process combination for treatment to meet the project requirements, while improving the pollutant treatment efficiency and meeting relevant emission regulations.

[0016] The oily sewage has the characteristics of large fluctuations in water quality and quantity, high and fluctuating sulfur and chlorine content, high and fluctuating petroleum content, etc. The treatment process must consider the impact of fluctuations in water quality and quantity on the system. This treatment equipment meets the following conditions:

[0017] 1. Meeting the characteristics of large water volume changes: For any selected scale of water treatment process, there is a problem of the upper limit of water volume treatment capacity. This treatment equipment can adapt to water volume changes within a certain range.

[0018] 2. Strong shock load resistance: Since the water quality and quantity of the oily sewage in this project fluctuate greatly with seasons, this treatment equipment has extremely strong shock load resistance.

[0019] 3. Minimizing secondary pollution as much as possible: Since simple physical and chemical methods can only transfer pollutants, a large amount of secondary pollutants will be generated and the pollutants are not completely degraded. While the biological method degrades and converts pollutants into water, carbon dioxide, nitrogen, etc. through the action of microorganisms. Therefore, this treatment equipment fully applies the biological method both in terms of economy and environmental protection. At the same time, the excess sludge generated by the sewage treatment system is disposed of reasonably and effectively to prevent it from bringing secondary pollution to the surrounding environment.

[0020] Based on the above equipment, the present utility model meets the characteristics of large water volume changes, has strong shock load resistance, reduces secondary pollution, is convenient for the configuration of automated auxiliary facilities, and the effluent index meets the discharge standard. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 : Structural schematic diagram of the ship oil sewage treatment equipment of the present utility model;

[0023] Among them, 1. Oil sewage tank; 2. Oil separation and sedimentation tank; 3. Air flotation tank; 4. Fenton oxidation tank; 5. Coagulation sedimentation tank; 6. A / O tank; 7. Secondary sedimentation tank; 8. Clean water tank; 9. Waste oil tank; 10. First PAC dosing device; 11. Fenton reagent dosing device; 12. Second PAC dosing device; 13. pH adjustment device; 14. Sludge return pipe; 15. Blower; 16. Sludge tank. Detailed implementation manners

[0024] To better understand the present utility model, the following further clearly elaborates the content of the present utility model in combination with embodiments. However, the protected content of the present utility model is not limited to the following embodiments. In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details.

[0025] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components described in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the sake of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification.

[0026] In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0027] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the patent and should not be construed as a limitation to the present utility model.

[0028] As Figure 1As shown in the figure, the ship oil sewage treatment equipment includes: an oil sewage tank 1 connected to the oil sewage, an oil separation and sedimentation tank 2 connected to the oil sewage tank 1, a flotation tank 3 connected to the oil separation and sedimentation tank 2, a Fenton oxidation tank 4 connected to the flotation tank 3, a coagulation sedimentation tank 5 connected to the Fenton oxidation tank 4, an A / O tank 6 connected to the coagulation sedimentation tank 5, a secondary sedimentation tank 7 connected to the A / O tank 6, and a clean water tank 8 connected to the secondary sedimentation tank 7.

[0029] In the middle of the oil separation and sedimentation tank 2, inclined tube fillers are provided, and an oil skimming device is provided at the upper part.

[0030] The oil sewage tank 1 is connected to the oil separation and sedimentation tank 2 through a lift pump.

[0031] As Figure 1 shown in the figure, the waste oil separated from the oil sewage tank 1 and the oil separation and sedimentation tank 2 are respectively connected to a waste oil tank 9.

[0032] As Figure 1 shown in the figure, the flotation tank 3 is connected to a first PAC dosing device 10.

[0033] As Figure 1 shown in the figure, the Fenton oxidation tank 4 is connected to a Fenton reagent dosing device 11.

[0034] As Figure 1 shown in the figure, the coagulation sedimentation tank 5 is respectively connected to a second PAC dosing device 12 and a pH adjustment device 13.

[0035] As Figure 1 shown in the figure, the A / O tank 6 is connected to a sludge return pipe 14 of the secondary sedimentation tank 7, and the A / O tank 6 is connected to a blower 15.

[0036] As Figure 1 shown in the figure, the scum and sludge generated by the oil separation and sedimentation tank 2, the scum generated by the flotation tank 3, the sludge generated by the coagulation sedimentation tank 5, and the sludge generated by the secondary sedimentation tank 7 are respectively connected to a sludge tank 16.

[0037] In the present utility model, the oil sewage tank 1 is used to temporarily store the oil sewage from the oil sewage barge. The oil separation and sedimentation tank 2 is used to achieve the preliminary separation of sewage, sludge, and waste oil. The flotation tank 3 is used to further remove floating oil. The Fenton oxidation tank 4 is used to degrade COD cr , and at the same time improve the biodegradability of the sewage. The coagulation sedimentation tank 5 is used for mud-water separation. The A / O tank 6, the secondary sedimentation tank 7, and the sludge tank 16 are an integrated sewage treatment equipment, so that the effluent meets the discharge standards and the sludge is disposed of. The clean water tank 8 is used to temporarily store the water treated to meet the standards of the system and is discharged externally regularly. The waste oil tank 9 is used to temporarily store the waste oil discharged from the system and is transported out for disposal regularly. The above-mentioned treatment units cooperate with each other to effectively treat the ship oil sewage.

[0038] As Figure 1As shown in the figure, the process flow of this treatment equipment is described in detail as follows: The oily sewage from the oily sewage barge first enters the oily sewage tank, where preliminary oil-water separation is achieved. The separated sewage is lifted by a lift pump and enters the oil separation sedimentation tank. In the middle of the oil separation sedimentation tank, inclined tube fillers are installed, and a floating oil collection device is installed on the upper part. The oil stains on the surface are skimmed and enter the waste oil tank, and the sludge sinks to the bottom sludge hopper. The sewage is separated and enters the air flotation tank. By introducing air into the sewage and allowing it to precipitate from the water in the form of tiny bubbles as carriers, the emulsified oil, tiny suspended particles and other pollutants in the sewage adhere to the bubbles and float to the water surface together with the bubbles, forming a foam of a three-phase mixture of gas, water and particles (oil). By collecting the foam or scum, the purpose of separating impurities and purifying the wastewater is achieved. The effluent from the air flotation tank enters the Fenton oxidation tank. First, acid is added to adjust the pH value between 3 and 5, then ferrous sulfate (FeSO4) is added, and then hydrogen peroxide (H2O2) is added. After the reaction is complete in the Fenton reaction tank, the effluent is adjusted to a pH of about 9 with sodium hydroxide (NaOH). After removing suspended substances such as iron sludge in the coagulation sedimentation tank, it enters the biochemical treatment system.

[0039] The pretreated oily sewage enters the A / O tank. This process consists of a front-stage anoxic tank and a rear-stage aerobic tank in series. The anoxic tank uses the organic matter in the raw sewage as a carbon source, ensuring sufficient denitrification and reducing the operating cost. The anoxic tank is before the aerobic tank. On the one hand, since part of the carbon source organic matter is nitrified during denitrification, the organic load of the aerobic tank can be reduced. On the other hand, it can also act as a biological selector, which is beneficial to controlling sludge bulking. The aerobic tank is located after the anoxic tank, so that the organic matter remaining after denitrification can be further removed, improving the effluent quality. After the sewage is treated by A / O, it enters the secondary sedimentation tank for mud-water separation. The treated up-to-standard water is pumped through the pipeline and discharged into the municipal sewage pipe network near the project.

[0040] The waste oil separated from the oily sewage tank and the oil separation sedimentation tank enters the waste oil tank for temporary storage and is regularly entrusted to a unit with corresponding qualifications for disposal.

[0041] Part of the sludge generated in the secondary sedimentation tank is returned to the A / O system, and the remaining sludge is discharged into the sludge thickening tank for temporary storage. The sludge, scum generated in the oil separation sedimentation tank, the scum generated in the air flotation tank, and the sludge generated in the coagulation sedimentation tank are also discharged into the sludge thickening tank for temporary storage and are regularly entrusted to a unit with corresponding qualifications for disposal.

[0042] This utility model is used for the treatment of an oily sewage project of a certain ship. The main treatment units and treatment effects are shown in the following table (unit: mg / L):

[0043]

[0044]

[0045] As can be seen from the above table, the equipment of the present utility model can effectively treat ship oily sewage, with high removal efficiency of corresponding pollutants, and can meet relevant regulations and achieve up-to-standard discharge.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not restrictive. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present utility model shall be covered within the scope of the claims of the present utility model as long as they do not depart from the spirit and scope of the technical solutions of the present utility model.

[0047] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Ship oil sewage treatment equipment, characterized in that: Including: An oily sewage tank connected to the oily sewage, an oil separation and sedimentation tank connected to the oily sewage tank, a flotation tank connected to the oil separation and sedimentation tank, a Fenton oxidation tank connected to the flotation tank, a coagulation and sedimentation tank connected to the Fenton oxidation tank, an A / O tank connected to the coagulation and sedimentation tank, a secondary sedimentation tank connected to the A / O tank, and a clean water tank connected to the secondary sedimentation tank.

2. The ship oil sewage treatment equipment according to claim 1, characterized in that: The middle of the oil separation and sedimentation tank is provided with inclined tube packing, and the upper part is provided with a floating oil collection device.

3. The ship oil sewage treatment equipment according to claim 2, characterized in that: The oily sewage tank is connected to the oil separation and sedimentation tank through a lift pump.

4. The ship oil sewage treatment equipment according to claim 3, characterized in that: The waste oil separated from the oily sewage tank and the oil separation and sedimentation tank are respectively connected to a waste oil tank.

5. The ship oil sewage treatment equipment according to claim 1, characterized in that: The flotation tank is connected to a PAC dosing device.

6. The ship oil sewage treatment equipment according to claim 1, characterized in that: The Fenton oxidation tank is connected to a Fenton reagent dosing device.

7. The ship oil sewage treatment equipment according to claim 1, characterized in that: The coagulation and sedimentation tank is respectively connected to a PAC dosing device and a pH adjustment device.

8. The ship oil sewage treatment equipment according to claim 1, characterized in that: The A / O tank is connected to the sludge return pipe of the secondary sedimentation tank, and the A / O tank is connected to a blower.

9. The ship oil sewage treatment equipment according to any one of claims 1-8, characterized in that: The scum and sludge generated by the oil separation and sedimentation tank, the scum generated by the flotation tank, the sludge generated by the coagulation and sedimentation tank, and the sludge generated by the secondary sedimentation tank are respectively connected to a sludge tank.

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