CN218968921U

CN218968921U - High-efficiency and low-flow-resistance marine oil sewage treatment device

Info

Publication number: CN218968921U
Application number: CN202223091759.4U
Authority: CN
Inventors: 周翔; 张磊; 俞豪吉; 顾思琪; 王国栋
Original assignee: 704th Research Institute of CSIC
Current assignee: 704th Research Institute of CSIC
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-05-05
Anticipated expiration: 2032-11-21

Abstract

The utility model relates to a high-efficiency and low-flow-resistance marine oil sewage treatment device which comprises a first-stage gravity separation assembly, a second-stage coalescence separation assembly and a third-stage adsorption filtration assembly, wherein the first-stage gravity separation assembly is connected with the second-stage coalescence separation assembly, and the second-stage coalescence separation assembly is connected with the third-stage adsorption filtration assembly through the plunger pump. The utility model realizes the grading treatment of floating oil, dispersed oil and emulsified oil based on the particle size characteristics of bilge oil sewage oil drops. The discharged water meets the 5ppm index requirement through a combined process of first-stage gravity separation, second-stage coalescence separation and third-stage adsorption filtration; and the processing flow is flexibly switched by combining the use working conditions of the real ship. When the secondary treatment water is qualified, the secondary treatment water can be directly discharged, and the service life of the tertiary adsorption filtration is prolonged; the three-stage adsorption filtration adopts a tubular activated carbon felt to achieve the function of full-flux drainage, and has the advantages of high-efficiency treatment and low resistance.

Description

High-efficiency and low-flow-resistance marine oil sewage treatment device

Technical Field

The utility model relates to a marine oil sewage treatment device, in particular to a treatment device for treating petroleum-containing sewage generated by main and auxiliary mechanical equipment in cabins such as cabins, power stations, auxiliary cabins, cold stations and the like on ships.

Background

The existing domestic similar products adopt the treatment technology that: a third-level oil sewage treatment technology of first-level gravity separation, second-level fine filtration and third-level membrane separation. The foreign similar products adopt high-speed centrifugal separators to realize oil-water separation, and other adopted technologies are similar to domestic treatment technologies.

Aiming at the problems of the three-stage treatment process in China at present, the membrane separation technology adopted by the third stage is mainly adopted, and the membrane is generally an ultrafiltration membrane. Firstly, the membrane can not realize the whole flux outboard discharge, at least 20% of the treated water is required to flow back to the bilge for recycling for treatment, and the problems of low treatment efficiency and high energy consumption are caused. In addition, the flow resistance is high during membrane separation filtration, resulting in low discharge pressure. The high-speed centrifugal separation technology adopted abroad has the disadvantages of large noise, high energy consumption, high maintenance cost and the like.

Disclosure of Invention

The utility model provides a high-efficiency and low-flow-resistance marine oil sewage treatment device, which solves the problems of low efficiency and high energy consumption of domestic and foreign treatment processes based on the analysis.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a marine oily water treatment facilities of high-efficient and low flow resistance, includes one-level gravity separation subassembly, second grade coalescence separation subassembly, tertiary adsorption filtration subassembly, plunger pump, second grade coalescence separation subassembly is connected to one-level gravity separation subassembly, and tertiary adsorption filtration subassembly is connected through the plunger pump to second grade coalescence separation subassembly.

Further, the shell of the first-stage gravity separation assembly is of a cylindrical structure, an umbrella-shaped inclined plate is arranged in the shell, an electric heater and a temperature controller are arranged outside the shell, the temperature controller is used for controlling the heating temperature of the first-stage gravity separation assembly, and two oil level sensors are arranged at the top of the shell and used for controlling the discharge of floating oil on the upper part of the gravity separation assembly.

Further, a group of coalescing filter elements and a group of interception filter elements are arranged in the secondary coalescing separation assembly, the coalescing filter elements are used for capturing, coalescing and floating dispersed oil, and the interception filter elements are used for intercepting and filtering emulsified oil with the particle size of 2-5 mu m.

Furthermore, the interception filter element is formed by compounding polymer fibers with acid and alkali resistance and good hydrophilicity, and has excellent water and oil resistance in a water phase.

Further, the secondary coalescence-separation component is provided with a differential pressure meter and a pressure controller, the differential pressure meter is used for monitoring the resistance of the whole secondary coalescence-separation cylinder in real time, and the pressure controller has a pressure-bearing alarm prompt function for the whole cylinder.

Further, the coalescing filter element and the interception filter element are assembled on the base through threaded connection respectively, and the top is provided with a sealing cover plate.

Further, the three-stage adsorption filter component is internally provided with a tubular activated carbon felt which can adsorb emulsified oil below 2 mu m and has oleophylic and hydrophobic properties, and low flow resistance can be realized through discharge to the outside.

Further, the inner layer and the outer layer of the tubular activated carbon felt are respectively sleeved with filter cloth for realizing the filtration of oil drops with the particle size of more than 1 mu m.

Further, the middle layer of the activated carbon felt filter element is a rolled felt layer, the inside and the outside of the activated carbon felt filter element are wrapped with filter cloth layers, the activated carbon felt filter element is integrally fixed on a pipeline, and a bottom joint extends into a fixed hole through three O-shaped rings to realize tightness with an inlet runner.

The beneficial effects of the utility model are as follows:

1) The utility model realizes the grading treatment of floating oil, dispersed oil and emulsified oil based on the particle size characteristics of bilge oil sewage oil drops. The discharged water meets the 5ppm index requirement through a combined process of first-stage gravity separation, second-stage coalescence separation and third-stage adsorption filtration.

2) And the processing flow is flexibly switched by combining the use working conditions of the real ship. When the secondary treatment water is qualified, the secondary treatment water can be directly discharged, and the service life of the tertiary adsorption filtration is prolonged.

3) The three-stage adsorption filtration adopts a tubular activated carbon felt to achieve the function of full-flux drainage, and has the advantages of high-efficiency treatment and low resistance.

4) The oil level sensor adopts a non-contact capacitive sensor, so that the problems of false alarm and high failure rate are solved.

The marine oil sewage treatment device has the following advantages:

1) The method is used for treating petroleum-containing sewage generated by main and auxiliary mechanical equipment in cabins such as cabins on ships, power stations, auxiliary cabins, cold stations and the like, and can meet the emission standard requirements of MEPC.107 (49) and GB 3552-2018. And (5) returning the water which does not reach the standard to the bilge, and discharging the separated dirty oil to a waste oil tank.

2) Realizing high-efficiency and low-flow resistance bilge oil sewage treatment.

3) Can meet the requirement of 5ppm discharge index, and is suitable for the oil sewage discharge standard of the green ship sign.

Drawings

FIG. 1 is a front view showing the structure of a high-efficiency and low-flow-resistance marine oil sewage treatment apparatus of the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of a secondary coalescing separation cartridge;

FIG. 4 is a schematic diagram of a three stage adsorption filtration cartridge.

Detailed Description

The utility model provides a high-efficiency and low-flow-resistance marine oil sewage treatment device, which is used for making the advantages and the technical scheme of the utility model clearer and more definite, and is described in detail below with reference to specific embodiments.

As shown in fig. 1 to 3, the high-efficiency and low-flow-resistance marine oil sewage treatment device of the present utility model mainly comprises a common base 1, a primary gravity separation assembly 2, a secondary coalescence separation assembly 15, a tertiary adsorption filtration assembly 10, a plunger pump 16, an electric cabinet 7 and an oil concentration meter 17.

The oily water enters the first-stage gravity separation assembly 2 through vacuum suction, the shell of the assembly is of a cylindrical structure, an umbrella-shaped sloping plate 3 is arranged in the assembly, the shallow pool sedimentation theory is fully utilized to remove non-emulsified oil such as heavy oil, light diesel oil and the like, and a small amount of emulsified oil which is easy to coalesce is removed. An electric heater 5 and a temperature controller 4 are arranged outside, and the temperature controller 4 controls the heating temperature of the primary cylinder. Two oil level sensors 6 are arranged at the top and used for controlling the discharge of the floating oil at the upper part of the primary cylinder.

The primary gravity separated oily water is pumped by a plunger pump 16 to a secondary coalescing separation assembly 15 having a set of coalescing filter cartridges 12 and a set of coalescing filter cartridges 14 mounted therein. The oily water first flows to the coalescing filter element 12 to capture, coalesce and float the dispersed oil. Then the emulsified oil with the particle size of 2-5 mu m is intercepted and filtered through the interception filter element 14, and finally the purpose of demulsification is achieved. The cylinder body of the secondary coalescence-separation component 15 is also provided with a differential pressure meter 11 and a pressure controller 13, wherein the differential pressure meter can monitor the resistance of the whole secondary coalescence-separation cylinder body in real time, and the pressure controller has a pressure-bearing alarm prompt function for the whole cylinder body. The filter element is assembled on the base 15.1 through threaded connection, and the top is provided with a sealing cover plate 15.2.

When the effluent of the secondary coalescence-separation component does not reach the discharge index, the device automatically enters the tertiary adsorption-filtration component 10 for advanced treatment so as to adsorb emulsified oil below 2 mu m. The three-stage cylinder is provided with an activated carbon felt filter element 8, and meanwhile, the pressure gauge 9 is arranged outside to observe the internal pressure condition. The middle layer of the active carbon felt filter element is a rolled felt layer 8.2, the inside and the outside of the active carbon felt filter element are wrapped with filter cloth layers 8.1 and 8.3, and the active carbon felt filter element is integrally fixed on a pipeline. The bottom joint extends into the fixing hole through three O-shaped rings 8.4, so that the requirement on sealing performance of the inlet runner is met.

The marine oil sewage treatment device provided by the utility model has the following characteristics:

1) The device adopts a combination process of first-stage gravity separation, second-stage coalescence separation and third-stage adsorption filtration. Wherein the first stage removes non-emulsified oil such as heavy oil, light diesel oil and the like through gravity separation. And removing part of the easily coalesced emulsified oil by a physical method, and intercepting the emulsified oil with the particle size of 2-5 mu m. And three-stage adsorption of emulsified oil with particle size below 2 microns.

2) The first-stage gravity separation component is of a cylinder structure, and is internally provided with umbrella-shaped inclined plate components, an electric heater, a temperature controller and an oil level sensor which are core components of the gravity separation process. When the oily water flows through the inclined plate, the oil drops wet, collide and coalesce on the inclined plate, so that the functions of oil drop coarse granulation and gravity separation are realized. When the top end in the primary cylinder body is accumulated to a certain oil level, the oil level sensor feedback signal triggers the oil discharge electromagnetic valve to open, so that an automatic oil discharge function is realized.

3) The secondary coalescence-separation component is provided with a coalescence filter element and an interception filter element. The oily water passes through the coalescing filter element from inside to outside, dispersed oil drops collide with the surface of the skeleton of the adsorbing material, and the oil drops are captured by the surface material due to the roughness and lipophilicity of the surface of the material and then spread on the surface of the skeleton. The oil film attached to the framework can become larger gradually along with the increase of collision times, and when the buoyancy force received by the oil film is larger than the adhesive force, oil drops can separate from the framework so as to float upwards to become floating oil, thereby realizing physical demulsification separation. The demulsified oil sewage passes through the interception filter element from outside to inside and is used for preventing large oil drops after demulsification from overflowing, and meanwhile, part of emulsified oil can be filtered and intercepted. The interception filter element is formed by compounding polymer fibers with acid and alkali resistance and good hydrophilicity, and has excellent water and oil resistance in a water phase.

4) The three-stage adsorption filter component is internally provided with a tubular activated carbon felt, and can adsorb emulsified oil below 2 mu m. Meanwhile, the material has oleophilic and hydrophobic properties, and can realize low flow resistance through discharge to the outside. In addition, the inner layer and the outer layer of the tubular activated carbon felt are respectively sleeved with filter cloth, so that oil drops with the particle size of more than 1 mu m are filtered.

Example 1:

on a certain experimental base of Pinus maritima Jiang Xinqiao, a novel marine oily sewage treatment device CYZ (A) -0.5 is developed, and the inflow rate Q=0.5 m of the device ³ And/h. According to MEPC107.49, emulsified oil sewage with the concentration of 3000ppm is prepared, 6%C liquid treatment test is carried out, and the discharged water meets the 5ppm index requirement through sampling test.

Claims

1. The utility model provides a marine oily water treatment facilities of high-efficient and low flow resistance which characterized in that: the device comprises a first-stage gravity separation assembly, a second-stage coalescence separation assembly, a third-stage adsorption filtration assembly and a plunger pump, wherein the first-stage gravity separation assembly is connected with the second-stage coalescence separation assembly, and the second-stage coalescence separation assembly is connected with the third-stage adsorption filtration assembly through the plunger pump.

2. The high-efficiency and low-flow-resistance marine oil sewage treatment device according to claim 1, wherein: the shell of the primary gravity separation component is of a cylindrical structure, an umbrella-shaped inclined plate is arranged in the shell, an electric heater and a temperature controller are arranged outside the shell, the temperature controller is used for controlling the heating temperature of the primary gravity separation component, and two oil level sensors are arranged at the top of the shell and used for controlling the discharge of floating oil on the upper part of the gravity separation component.

3. The high-efficiency and low-flow-resistance marine oil sewage treatment device according to claim 1, wherein: the secondary coalescence-separation component is internally provided with a group of coalescence filter elements and a group of interception filter elements, the coalescence filter elements are used for capturing, coalescing and floating the dispersed oil, and the interception filter elements are used for intercepting and filtering the emulsified oil with the particle size of 2-5 mu m.

4. A high efficiency and low flow resistance marine oil and sewage treatment device according to claim 3, wherein: the interception filter element is formed by compounding polymer fibers with acid and alkali resistance and good hydrophilicity, and has excellent water and oil resistance in a water phase.

5. A high efficiency and low flow resistance marine oil and sewage treatment device according to claim 3, wherein: the secondary coalescence-separation component is provided with a differential pressure meter and a pressure controller, the differential pressure meter is used for monitoring the resistance of the whole secondary coalescence-separation cylinder in real time, and the pressure controller has a pressure-bearing alarm prompt function on the whole cylinder.

6. A high efficiency and low flow resistance marine oil and sewage treatment device according to claim 3, wherein: the coalescing filter element and the interception filter element are assembled on the base through threaded connection respectively, and the top is provided with a sealing cover plate.

7. The high-efficiency and low-flow-resistance marine oil sewage treatment device according to claim 1, wherein: the three-stage adsorption filter assembly is internally provided with the tubular activated carbon felt which can adsorb emulsified oil below 2 mu m and has oleophylic and hydrophobic characteristics, and low flow resistance can be realized through discharge to the outside of the board.

8. The high-efficiency and low-flow-resistance marine oil sewage treatment device according to claim 7, wherein: the inner layer and the outer layer of the tubular activated carbon felt are respectively sleeved with filter cloth for filtering oil drops with the particle size of more than 1 mu m.

9. The high-efficiency and low-flow-resistance marine oil sewage treatment device according to claim 7, wherein: the middle layer of the activated carbon felt filter element is a rolled felt layer, the inside and the outside of the activated carbon felt filter element are wrapped with filter cloth layers, the activated carbon felt filter element is integrally fixed on a pipeline, and a bottom joint extends into a fixed hole through three O-shaped rings to realize tightness with an inlet runner.