Oil removal bag

Abstract

The utility model belongs to the technical field of petrochemical engineering, and discloses an oil removal bag which comprises a coalescer and three activated carbon filters, a partition plate is arranged in a coalescer cylinder of the coalescer, a plurality of through holes are uniformly formed in the partition plate, blocking membrane coalescence elements are mounted on the through holes, and a primary inlet is formed in the top surface of the coalescer cylinder on one side of the partition plate; a primary outlet is formed in the bottom surface of the coalescer barrel on the other side of the partition plate; the primary outlet is connected with a secondary inlet on the activated carbon filter, a tube plate is arranged at the lower part in a filter cylinder of the activated carbon filter, and a water cap is arranged on the tube plate; activated carbon filler is arranged on the water cap; a water distributor is arranged above the activated carbon and provided with a water inlet pipe, and the water inlet pipe is communicated with an elbow through a forged pipe. The coalescer and the activated carbon filter are combined for use, so that the effect of further purifying water after oil removal is realized, the two-stage water treatment effect is good, the maintenance cost and the operation difficulty are relatively low, and the treatment efficiency of oil-water separation and the water quality standard are improved.

Description

Technical Field

[0001] This utility model belongs to the field of petrochemical technology, specifically an oil removal bag. Background Technology

[0002] Currently, the ethylene industry in the petrochemical sector generates a large amount of waste alkaline solution during production. From the perspectives of economic efficiency and environmental protection, the treatment and recycling of this waste alkaline solution is imperative. Existing technology uses a coalescer to separate the oil and water in the waste alkaline solution, but the quality of the separated water is not very good.

[0003] The relevant reference CN114804393A discloses a device for removing oil and impurities from oilfield reinjection water, including a sewage settling tank, a horizontal oil-water separator connected to the sewage settling tank, a filter connected to the horizontal oil-water separator, a fine oil-water separator connected to the filter, and a precision filter connected to the fine oil-water separator. The multi-stage filter and separator require regular maintenance and cleaning to ensure their normal operation and treatment effect. The maintenance cost and operation difficulty of the equipment are relatively high. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an oil removal pack that improves the efficiency of oil-water separation and treatment and water quality standards.

[0005] To solve the above technical problems, this utility model provides an oil removal package, including a coalescer and an activated carbon filter. The activated carbon filter comprises three parts. The coalescer includes a coalescer cylinder with a baffle plate inside. Multiple through holes are evenly distributed on the baffle plate, and a blocking membrane coalescing element is installed on each through hole. A primary inlet is located on the top surface of the coalescer cylinder on one side of the baffle plate; a primary outlet is located on the bottom surface of the coalescer cylinder on the other side of the baffle plate. The primary outlet is connected to a secondary inlet on the activated carbon filter. The activated carbon filter includes a filter cylinder with a tube sheet in the lower part of the filter cylinder. A water cap is installed on the tube sheet; activated carbon packing is installed on the water cap; a water distributor is located above the activated carbon filter, and an inlet pipe is installed on the water distributor. The inlet pipe is connected via a forged pipe and an elbow.

[0006] By adopting the above technical solution, the combined use of a coalescer and an activated carbon filter achieves the effect of efficient oil removal followed by further water purification. This two-stage water treatment provides good results with relatively low maintenance costs and operational complexity. The coalescer is responsible for efficiently separating oil droplets from the oil-water mixture, while the activated carbon filter is responsible for deep water purification. Their synergistic operation improves the efficiency of oil-water separation and water quality standards.

[0007] Preferably, the top surface of the coalescing cylinder is provided with an oil collecting chamber cylinder through a reinforcing ring.

[0008] By adopting the above technical solution, the reinforcing ring, as a reinforcing element, increases the structural strength of the coalescing cylinder around the opening, and prevents the strength reduction caused by stress concentration and structural discontinuity due to the opening.

[0009] Preferably, an oil outlet is provided on the top surface of the oil collecting chamber cylinder.

[0010] By adopting the above technical solution, an oil outlet is set on the top surface of the oil collecting chamber. By utilizing the density difference between oil and water, the oil naturally floats to the top of the oil collecting chamber, thereby discharging the separated oil phase more efficiently.

[0011] Preferably, a local interface meter and a remote interface meter are installed on the side wall of the oil collecting chamber.

[0012] By adopting the above technical solutions, the height of the liquid level can be monitored through local interface gauges and remote interface gauges, providing data support for operators.

[0013] Preferably, the coalescing cylinder has end caps installed at both ends via flanges, handles are installed on the outer walls of the end caps, and a boom is installed at the top of the end caps.

[0014] By adopting the above technical solution, the detachable end cap design, combined with the handle and boom, facilitates quick opening of the equipment for internal inspection, filter replacement or cleaning, shortening downtime and improving maintenance efficiency.

[0015] Preferably, manholes are provided on the side wall and bottom of the filter cylinder.

[0016] By adopting the above technical solution, it is convenient for maintenance personnel to carry out maintenance through the manhole.

[0017] Preferably, the forged pipe on the inlet pipe of the activated carbon filter is installed on the side wall of the filter cylinder.

[0018] By adopting the above technical solution, the side wall water inlet design facilitates the assembly of the water inlet pipes of the three activated carbon filters and makes the overall structure of the oil removal pack more compact.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. The combination of the coalescer and activated carbon filter in this invention achieves efficient oil removal followed by further water purification, resulting in good two-stage water treatment with relatively low maintenance costs and operational difficulty. The coalescer is responsible for efficiently separating oil droplets from the oil-water mixture, while the activated carbon filter is responsible for deep water purification. The two work together to improve the efficiency of oil-water separation and water quality standards.

[0021] 2. The top surface of the coalescing cylinder of this utility model is provided with an oil collecting chamber cylinder through a reinforcing ring. The reinforcing ring increases the structural strength of the coalescing cylinder around the opening, preventing the strength reduction caused by stress concentration and structural discontinuity due to the opening.

[0022] 3. The forged pipe on the water inlet pipe of this utility model is set on the side wall of the filter cylinder. The side wall water inlet design facilitates the assembly of the water inlet pipe fittings of the three activated carbon filters and makes the overall structure of the oil removal package more compact. Attached Figure Description

[0023] Figure 1 This is the front view of the present utility model;

[0024] Figure 2 This is a top view of the present invention;

[0025] Figure 3 This is a structural diagram of the coalescer of this utility model;

[0026] Figure 4 This is a side view of the coalescer of this utility model;

[0027] Figure 5 This is a structural diagram of the activated carbon filter of this utility model.

[0028] Drawing numbers: 1. Coalescer, 2. Activated carbon filter, 3. Coalescer cylinder, 4. Baffle, 5. Barrier membrane coalescing element, 6. Primary inlet, 7. Differential pressure transmitter port, 8. Primary outlet, 9. Backwash pump, 10. Secondary inlet, 11. Filter cylinder, 12. Tube sheet, 13. Water cap, 14. Activated carbon packing, 15. Water distributor, 16. Inlet pipe, 17. Forged pipe, 18. Elbow, 19. Reinforcing ring, 20. Oil collection chamber cylinder, 21. Oil outlet, 22. Local interface gauge, 23. Remote interface gauge, 24. Flange, 25. Coalescer head, 26. Handle, 27. Boom, 28. Manhole, 29. Secondary outlet, 30. Filter head. Detailed Implementation

[0029] like Figure 1 , 2As shown, the oil removal package includes a coalescer 1 and three activated carbon filters 2. The coalescer 1 includes a coalescer cylinder 3, inside which is a baffle 4. Multiple through holes are evenly distributed on the baffle 4, and barrier membrane coalescing elements 5 are installed on these through holes. A primary inlet 6 is located on the top surface of the coalescer cylinder 3 on one side of the baffle 4, and a differential pressure transmitter port 7 is located on the side. A primary outlet 8 is located on the bottom surface of the coalescer cylinder 3 on the other side of the baffle 4, and a differential pressure transmitter port 7 is also located on the side. The primary outlet 8 is connected to a secondary inlet 10 on the activated carbon filter 2. The three secondary inlets 10 are connected in parallel. The activated carbon filter 2 includes a filter cylinder 11, with a tube sheet 12 installed in the lower part of the filter cylinder 11. A water cap 13 is installed on the tube sheet 12, and activated carbon packing 14 is installed on the water cap 13. The activated carbon packing 14 is in full contact with impurities in the water, and these impurities can be adsorbed in the micropores of the activated carbon. The activated carbon can also adsorb Cl ions and ozone in the water, and has a certain adsorption capacity for organic matter in the water. A water distributor 15 is installed above the activated carbon packing 14, and an inlet pipe 16 is installed on the water distributor 15. The inlet pipe 16 is connected to an external elbow 18 through a forged pipe 17. The combined use of the coalescer 1 and the activated carbon filter 2 in this application, using HK barrier membrane oil removal technology and activated carbon packing 14 filtration, achieves the effect of efficient oil removal followed by further water purification. The two-stage water treatment effect is good, and the maintenance cost and operation difficulty are relatively low. The coalescer 1 is responsible for efficiently separating oil droplets from the oil-water mixture, while the activated carbon filter 2 is responsible for deep purification of the water, further removing CL ions, ozone and organic matter from the water, and further improving the water quality. The two work together to improve the processing efficiency of oil-water separation and the water quality standards.

[0030] like Figure 3 The top surface of the coalescing cylinder 3 shown is provided with an oil collecting chamber cylinder 20 via a reinforcing ring 19. The reinforcing ring 19 serves as a reinforcing element, increasing the structural strength of the coalescing cylinder 3 around the opening and preventing strength reduction caused by stress concentration and structural discontinuity due to the opening.

[0031] An oil outlet 21 is provided on the top surface of the oil collecting chamber cylinder 20. By providing an oil outlet 21 on the top surface of the oil collecting chamber cylinder 20, the density difference between oil and water is utilized to allow the oil to naturally float to the top of the oil collecting chamber, thereby discharging the separated oil phase more efficiently.

[0032] A local interface gauge 22 and a remote interface gauge 23 are installed on the side wall of the oil collecting chamber cylinder 20. The height of the liquid level can be monitored through the local interface gauge 22 and the remote interface gauge 23, providing data support for operators.

[0033] like Figure 4As shown, coalescer heads 25 are installed at both ends of the coalescer cylinder 3 via flanges 24. Handles 26 are provided on the outer wall of the coalescer heads 25, and a boom 27 is installed at the top of the coalescer heads 25. During the installation, maintenance, or relocation of the coalescer 1, the handles 26 on the outer wall of the coalescer heads 25 provide stable gripping points for operators, and the boom 27 provides clear lifting points for mechanical hoisting, making the hoisting and positioning of the coalescer 1 simpler and more efficient, and reducing labor intensity. The coalescer heads 25 are detachable, and combined with the handles 26 and the boom 27, they facilitate quick opening of the equipment for internal inspection, filter replacement, or cleaning, shortening downtime and improving maintenance efficiency.

[0034] like Figure 5 As shown, manholes 28 are provided on the side walls of the filter housing 11 and on the filter head 30 at the bottom, facilitating maintenance personnel to perform maintenance through the manholes. The filter head 30 is arc-shaped, with a secondary outlet 29 at the bottom.

[0035] The forged pipe 17 on the inlet pipe 16 of the activated carbon filter 2 is located on the side wall of the filter body 11. The side wall water inlet design facilitates the assembly of the inlet pipe fittings of the three activated carbon filters 2 and makes the overall structure of the oil removal package more compact.

[0036] This application's coalescer 1 employs barrier membrane oil removal technology, incorporating multiple barrier membrane coalescing elements 5. Barrier oil removal is a novel oil-water separation technology concept completely different from adsorption oil removal. It utilizes unique HK fibers to form a membrane material, achieving the separation of hydrophobic dispersed substances in water. When the HK barrier membrane is immersed in water, the HK fibers of the membrane undergo a hydration reaction with the water, thereby forming a uniform, dense, and firmly associated water film on the fiber surface, exhibiting extremely strong oleophobic properties. The HK fiber density in the HK barrier membrane is designed to ensure that the associated water films on the membrane fibers overlap, thus forming an organic whole with HK fibers as the framework and associated water as the structure. When oily water attempts to pass through this activated HK barrier membrane, appropriate pressure is applied to the water, allowing water molecules on the incoming water side to exchange with water molecules inside the membrane, while hydrophobic dispersed substances such as oil cannot exchange with the associated water inside the membrane and are selectively blocked, thus successfully achieving oil-water separation. This effect is defined as "barrier oil removal." Because the film-forming fibers of the HK barrier membrane are tightly coated with water associated with them, oil droplets blocked during operation cannot be adsorbed onto the HK membrane and cause contamination; they can only remain on the outer surface of the membrane. As the number of oil droplets increases, they collide and agglomerate to form larger oil droplets that float under buoyancy, thus truly achieving the purpose of oil-water separation.

[0037] Three activated carbon filters 2 are connected in parallel, with two in use and one as a backup. They are equipped with two backwash pumps 9 to periodically backwash the activated carbon filters 2 and restore their performance. Valves are installed on the pipelines of coalescer 1 and activated carbon filters 2. One coalescer 1 and three activated carbon filters 2 are controlled by a DCS system.

[0038] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. An oil removal package, comprising a coalescer (1) and an activated carbon filter (2), characterized in that: The activated carbon filter (2) consists of three parts. The coalescer (1) includes a coalescer cylinder (3), and a partition (4) is provided inside the coalescer cylinder (3). Multiple through holes are evenly opened on the partition (4), and a blocking membrane coalescing element (5) is installed on the through holes. A primary inlet (6) is provided on the top surface of the coalescer cylinder (3) on one side of the partition (4); a primary outlet (8) is provided on the bottom surface of the coalescer cylinder (3) on the other side of the partition (4); the primary outlet (8) and the activated carbon filter (2) are connected to each other. The activated carbon filter (2) is connected to the secondary inlet (10). The activated carbon filter (2) includes a filter cylinder (11). A tube plate (12) is provided in the lower part of the filter cylinder (11). A water cap (13) is provided on the tube plate (12). Activated carbon packing (14) is provided on the water cap (13). A water distributor (15) is provided above the activated carbon packing (14). A water inlet pipe (16) is provided on the water distributor (15). The water inlet pipe (16) is connected through a forged pipe (17) and an elbow (18).

2. The degreasing bag according to claim 1, characterized in that: The top surface of the coalescing cylinder (3) is provided with an oil collecting chamber cylinder (20) through a reinforcing ring (19).

3. The degreasing bag according to claim 2, characterized in that: An oil outlet (21) is provided on the top surface of the oil collecting chamber cylinder (20).

4. The degreasing bag according to claim 2, characterized in that: The oil collecting chamber cylinder (20) is equipped with a local interface meter (22) and a remote interface meter (23) on its side wall.

5. The degreasing bag according to claim 1, characterized in that: The coalescing cylinder (3) has coalescing heads (25) installed at both ends via flanges (24), handles (26) are installed on the outer side wall of the coalescing head (25), and a boom (27) is installed at the top of the coalescing head (25).

6. The degreasing bag according to claim 1, characterized in that: Manholes (28) are provided on the side wall and the bottom filter head (30) of the filter cylinder (11).

7. The degreasing bag according to claim 1, characterized in that: The forged pipe (17) on the inlet pipe (16) of the activated carbon filter (2) is set on the side wall of the filter cylinder (11).

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