A mist eliminator for oil and gas treatment

Abstract

This invention discloses a novel demister for oil and gas treatment, belonging to the field of demisting. The novel demister includes a housing with a metal wire mesh installed on one side. The side of the housing closest to the metal wire mesh is the air inlet, and the other end is the air outlet. Multiple demisting units are arranged inside the housing. Each demisting unit includes two baffles and a membrane layer located between the two baffles. Guide plates are arranged on both sides between the baffles and the membrane layer. The membrane layer and the baffles have the same overall shape. Each baffle includes a central zigzag segment and guide and streamline segments at both ends. The guide segments are away from the metal wire mesh. A cover plate is installed on the housing, and a spray unit is arranged on the cover plate. This improves the demister's processing capacity, reduces pressure drop resistance, increases demisting efficiency, and automatically sprays and washes the demister, resulting in good cleaning performance and low energy consumption.

Description

Technical Field

[0001] This invention relates to the field of demisting, and more specifically, to a novel demisting device for oil and gas treatment. Background Technology

[0002] Demisters are widely used in a series of processes such as desulfurization, demisting, oil-gas separation and acid mist purification in industries such as petrochemicals and environmental protection. Common demisters are divided into various types of demisting methods, and the separation efficiency of different types of demisting methods is also different. At present, the large-scale application is still the method of demisting by colliding and mixing the gases themselves.

[0003] Traditional demisters, which rely on gas collision and mixing for demisting, are not very effective at removing fine water mist, and their demisting effect needs to be improved. Furthermore, existing demisters are difficult to control when to spray, and cannot spray immediately when the demister is affected by dirt. In addition, the cleaning power of spray rinsing alone is insufficient for cleaning demisters in the current technology, resulting in poor cleaning effect. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the present invention aims to provide a novel demister for oil and gas treatment, which can improve the processing capacity of the demister, reduce pressure drop resistance, increase demisting efficiency, and automatically perform spraying and brushing treatment on the demister, resulting in good cleaning effect and low energy consumption.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A novel demister for oil and gas treatment includes a housing, on one side of which a metal wire mesh is installed. The side of the housing closest to the metal wire mesh is the air inlet, and the other end is the air outlet. Multiple demister units are arranged inside the housing. Each demister unit includes two baffles and a membrane layer. The membrane layer is located between the two baffles. Guide plates are arranged on both sides between the baffles and the membrane layer. The membrane layer and the baffles have the same overall shape.

[0009] The baffle plate includes a middle zigzag segment and two end guide segments and streamline segments, wherein the guide segments are away from the metal wire mesh;

[0010] A cover plate is installed on the housing, and a spray unit is provided on the cover plate. A pressure sensor and a flow rate sensor are installed below the cover plate at the air outlet end inside the housing.

[0011] A scraper is provided between the baffle plate and the membrane layer. The scraper has the same shape as the baffle plate. Both sides of the scraper are respectively attached to the baffle plate and the membrane layer. Both ends of the multiple scrapers are connected to brushes. Both ends of the brushes are equipped with first strong magnets. The first strong magnets are provided with a transmission mechanism and a valve mechanism that cooperate with the spraying unit.

[0012] Furthermore, the angle of the plate in the folded segment is 90°, and both the guide segment and the streamline segment have curved portions with a bending angle of 80°, and the curved portions of the guide segment and the streamline segment are in opposite directions.

[0013] Furthermore, the surfaces of the guide plate, the baffle plate, and the membrane layer are all coated with an anti-corrosion and hydrophobic coating.

[0014] Furthermore, the spray unit includes a PLC and a water pump mounted on the cover plate. The water pump, air pressure sensor, and flow rate sensor are all electrically connected to the PLC. The output end of the water pump is connected to a diversion valve. A spray pipe located at the air outlet end inside the housing is mounted on the cover plate. The spray pipe is connected to the diversion valve through a water pipe. The spray direction of the spray pipe is directly facing the baffle plate and the membrane layer.

[0015] Furthermore, the transmission mechanism includes a sleeve inserted inside the first strong magnet, a first connecting pipe installed below the cover plate, the upper end of the first connecting pipe being connected to the diversion valve via a water pipe, a second connecting pipe connecting the sleeve and the first connecting pipe, a second strong magnet being installed inside the sleeve, the second strong magnet being magnetically attracted to the first strong magnet, and a third connecting pipe being provided on one side of the sleeve, the two ends of the third connecting pipe being connected to the upper and lower ends of the sleeve respectively.

[0016] Furthermore, the valve mechanism includes a connecting rod inserted into the second strong magnet. An upper rubber block is installed at the upper end of the connecting rod, and a lower rubber block is installed at the lower end. A semi-circular ring is installed at the lower end of the upper rubber block at the connection between the sleeve and the third connecting pipe. An upper through hole covered by the semi-circular ring is opened on the sleeve, and a lower through hole is opened at the lowest end of the sleeve. The height of the lower rubber block is higher than the height of the connection between the third connecting pipe and the lower end of the sleeve. An extension block is installed at the lower end of the second strong magnet.

[0017] Furthermore, a rubber pad is installed on the second strong magnet, and the diameters of the upper rubber block and the lower rubber block are both larger than the diameter of the rubber pad, while the diameter of the rubber pad is larger than the diameter of the sleeve.

[0018] Furthermore, the first strong magnet has an opening, and the position of the opening is on the same vertical plane as the position of the upper through hole.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of this invention are:

[0021] (1) The guide plate in this solution can divide the gas into individual airflows, and the demisting effect can be better achieved through the treatment of the baffle and the membrane layer. It is more effective in treating fine water mist, and has high efficiency and low energy consumption. Furthermore, the pressure sensor and flow rate sensor provide real-time feedback signals to the spray unit. When the pressure or flow rate is lower than the set value, the spray unit will automatically spray and rinse the demisting unit and the metal wire mesh to ensure the demisting effect and efficiency of the demister.

[0022] (2) This solution controls the scraper to move up and down through the transmission mechanism and valve assembly, and works in conjunction with the spray unit. When the spray unit sprays and rinses, the transmission mechanism and valve mechanism can control the scraper and brush to move up and down to scrape off the sludge on the surface of the baffle plate and membrane layer, and to brush the surface of the metal wire mesh. In conjunction with the rinsing of the spray unit, it can achieve a better cleaning effect on the metal wire mesh, baffle plate and membrane layer. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is an exploded view of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the defogging unit of the present invention;

[0026] Figure 4 This is a schematic diagram of the scraper structure of the present invention;

[0027] Figure 5 For the present invention Figure 2 Enlarged view of point A in the middle;

[0028] Figure 6 This is a top sectional view of the present invention;

[0029] Figure 7 This is a cross-sectional view of the transmission mechanism and valve mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the transmission mechanism and valve mechanism of the present invention.

[0031] Explanation of the labels in the diagram:

[0032] 1. Housing; 2. Wire mesh; 3. Guide plate; 4. Baffle plate; 401. Streamline segment; 402. Bent line segment; 403. Guide section; 5. Membrane layer; 6. Cover plate; 7. PLC; 8. Water pump; 9. Diverter valve; 10. Spray pipe; 11. Air pressure sensor; 12. Flow rate sensor; 13. Scraper; 14. Brush; 15. First strong magnet; 16. Sleeve; 17. First connecting pipe; 18. Second connecting pipe; 19. Second strong magnet; 20. Third connecting pipe; 21. Connecting rod; 22. Upper rubber block; 23. Lower rubber block; 24. Semicircular ring; 25. Upper through hole; 26. Lower through hole; 27. Extension block; 28. Rubber pad; 29. ​​Opening. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-8 A novel demister for oil and gas treatment includes a housing 1, with a metal wire mesh 2 installed on one side of the housing 1. The side of the housing 1 closest to the metal wire mesh 2 is the air inlet, and the other end is the air outlet. Multiple demister units are provided inside the housing 1. Each demister unit includes two baffles 4 and a membrane layer 5. The membrane layer 5 is located between the two baffles 4. Guide plates 3 are provided on both sides between the baffles 4 and the membrane layer 5. The membrane layer 5 and the baffles 4 have the same overall shape.

[0035] The baffle 4 includes a middle zigzag segment 402 and two end guide segments 403 and streamline segments 401, with the guide segments 403 being away from the metal wire mesh 2;

[0036] A cover plate 6 is installed on the housing 1. A spray unit is provided on the cover plate 6. A pressure sensor 11 and a flow rate sensor 12 are installed below the cover plate 6 at the air outlet end inside the housing 1.

[0037] A scraper 13 is provided between the baffle 4 and the membrane layer 5. The scraper 13 has the same shape as the baffle 4. The two sides of the scraper 13 are respectively attached to the baffle 4 and the membrane layer 5. Both ends of the multiple scrapers 13 are connected to brushes 14. Both ends of the brushes 14 are equipped with first strong magnets 15. The first strong magnets 15 are equipped with a transmission mechanism and a valve mechanism that work in conjunction with the spray unit.

[0038] The guide plate 3 can divide the gas into individual airflows, and the baffle plate 4 and membrane layer 5 can achieve better demisting effect. It is more effective in treating fine water mist, with high efficiency and low energy consumption. Furthermore, the air pressure sensor 11 and flow rate sensor 12 provide real-time feedback signals to the spray unit. When the pressure or flow rate is lower than the set value, the spray unit will automatically spray and rinse the demisting unit and the metal wire mesh 2 to ensure the demisting effect and efficiency of the demister.

[0039] The scraper 13 is controlled to move up and down by the transmission mechanism and valve assembly, and cooperates with the spray unit. When the spray unit sprays and washes, the transmission mechanism and valve mechanism can control the scraper 13 and brush 14 to move up and down to scrape off the sludge on the surface of the baffle plate 4 and membrane layer 5 and to brush the surface of the metal wire mesh 2. In conjunction with the rinsing of the spray unit, the metal wire mesh 2, baffle plate 4 and membrane layer 5 can be cleaned better.

[0040] See Figure 3 The angle of the plate of the broken segment 402 is 90°. Both the guide segment 403 and the streamline segment 401 have curved parts with a bending angle of 80°, and the curved parts of the guide segment 403 and the streamline segment 401 are in opposite directions.

[0041] This configuration allows the baffle 4 to alter the gas flow trajectory, flow space, and turbulence level during gas flow, achieving a high critical velocity while maintaining the demister's demisting efficiency.

[0042] See Figure 2 The surfaces of the flow guide plate 3, the baffle plate 4, and the membrane layer 5 are all coated with an anti-corrosion and hydrophobic coating.

[0043] It can prevent water droplets from condensing and adhering to the metal wire mesh 2, membrane layer 5 and baffle 4, thereby reducing the energy consumption of the demister.

[0044] See Figure 2 and Figure 6 The spray unit includes a PLC 7 and a water pump 8 mounted on the cover plate 6. The water pump 8, the air pressure sensor 11 and the flow rate sensor 12 are all electrically connected to the PLC 7. The output end of the water pump 8 is connected to a diversion valve 9. A spray pipe 10 located at the air outlet end inside the housing 1 is mounted on the cover plate 6. The spray pipe 10 is connected to the diversion valve 9 through a water pipe. The spraying direction of the spray pipe 10 is directly opposite the baffle plate 4 and the membrane layer 5.

[0045] The air pressure sensor 11 and the flow rate sensor 12 detect values. If one of the detected values ​​is lower than the set value, a signal is sent to the PLC7 for feedback. The PLC7 then automatically starts the water pump 8 and sends water to the spray pipe 10 through the diversion valve 9 to achieve the rinsing of the baffle plate 4, the membrane layer 5, and the metal mesh 2.

[0046] See Figure 5 and Figure 7 The transmission mechanism includes a sleeve 16 inserted inside a first strong magnet 15, a first connecting pipe 17 installed below the cover plate 6, the upper end of the first connecting pipe 17 being connected to a diverter valve 9 via a water pipe, a second connecting pipe 18 connecting the sleeve 16 and the first connecting pipe 17, a second strong magnet 19 being installed inside the sleeve 16, the second strong magnet 19 being magnetically attracted to the first strong magnet 15, a third connecting pipe 20 being provided on one side of the sleeve 16, the two ends of the third connecting pipe 20 being connected to the upper and lower ends of the sleeve 16 respectively;

[0047] Water pump 8 delivers water to diversion valve 9. A small portion of the water flows into sleeve 16 through first connecting pipe 17. As the water pressure increases, second strong magnet 19 moves downward under pressure and drives first strong magnet 15 downward through strong magnetic force. This causes multiple scrapers 13 to move downward through brush 14, thus scraping away dirt from the surface of baffle 4 and membrane layer 5. When second strong magnet 19 moves and contacts the surface of lower rubber block 23, it squeezes lower rubber block 23 downward. When water flows into third connecting pipe 20 and reaches the bottom of sleeve 16, it drives second strong magnet 19 upward. This causes brush 14 to move up and down in conjunction with second strong magnet 19. Through the cooperation of brush 14 and scrapers 13, the metal wire mesh 2, baffle 4 and membrane layer 5 are brushed and scraped away.

[0048] See Figure 7 and Figure 8 The valve mechanism includes a connecting rod 21 inserted inside the second strong magnet 19. An upper rubber block 22 is installed at the upper end of the connecting rod 21 and a lower rubber block 23 is installed at the lower end. A semi-circular ring 24 is installed at the lower end of the upper rubber block 22 at the connection between the sleeve 16 and the third connecting pipe 20. An upper through hole 25 covered by the semi-circular ring 24 is opened on the sleeve 16. A lower through hole 26 is opened at the lowest end of the sleeve 16. The height of the lower rubber block 23 is higher than the height of the connection between the third connecting pipe 20 and the lower end of the sleeve 16. An extension block 27 is installed at the lower end of the second strong magnet 19.

[0049] The valve assembly can control the flow direction of water delivered by the second connecting pipe 18 when the second strong magnet 19 moves up and down. When the second strong magnet 19 moves to the bottom, it drives the upper rubber block 22, connecting rod 21 and lower rubber block 23 to move, which will close the space between itself and the lower rubber block 23. The water delivered by the second connecting pipe 18 enters the third connecting pipe 20, and is delivered from the third connecting pipe 20 to the bottom of the second strong magnet 19 at the lower end of the sleeve 16, which drives the second strong magnet 19 to move upward. After the second strong magnet 19 moves to the top, it drives the lower rubber block 23 to reset, and the water flows back into the area above the second strong magnet 19, thus forming an automatic circulation.

[0050] See Figure 7 and Figure 8 A rubber pad 28 is installed on the second strong magnet 19. The diameters of the upper rubber block 22 and the lower rubber block 23 are both larger than the diameter of the rubber pad 28, and the diameter of the rubber pad 28 is larger than the diameter of the sleeve 16.

[0051] The rubber pad 28 allows for closer contact and better sealing between the sleeves 16. Furthermore, the moving resistance of the upper rubber block 22 and the lower rubber block 23 is greater than that of the rubber pad 28. As a result, when the second strong magnet 19 does not contact the upper rubber block 22 and the lower rubber block 23, it cannot drive the upper rubber block 22 and the lower rubber block 23 to move, thus improving the stability of the structure.

[0052] See Figure 8 The first strong magnet 15 has an opening 29, and the position of the opening 29 is on the same vertical plane as the position of the upper through hole 25.

[0053] By setting the opening 29, the first strong magnet 15 can be prevented from affecting the water flow out of the sleeve 16, thereby allowing the second strong magnet 19 and the first strong magnet 15 to move upward to the maximum extent.

[0054] Working principle: Gas enters the casing 1 at a certain velocity. After passing through the metal mesh 2, the airflow is filtered and disturbed. Then, the gas is divided into individual airflows by the guide plate 3. When the gas reaches the baffle plate 4 and the membrane layer 5, it enters the channel between the baffle plate 4 and the membrane layer 5. When passing through the streamline section 401 of the baffle plate 4, the gas maintains a high critical velocity, reducing the loss of kinetic energy. When the airflow enters the baffle section 402, the gas is mixed with tiny water droplets due to the constantly changing gas flow space and the wall rebound effect. The efficiency of the combination is higher and the water droplet aggregation speed is faster. Since the membrane layer 5 has a certain degree of permeability, after the airflow bounces through the baffle plate 4 and passes through the membrane layer 5, it will cause a certain interference to the airflow in the adjacent wall. Under the action of the interference airflow, the airflow turbulence in the channel will be greatly increased, so the defogging effect will also be greatly improved. Due to the guiding effect of the baffle plate 4, the gas flow direction changes multiple times. Under the action of inertial force, the movement direction of the droplets or mist droplets is different from that of the gas, causing them to separate from the gas and collide with the baffle plate 4 to achieve the defogging effect.

[0055] When the demister is in use, the pressure sensor 11 and the flow rate sensor 12 monitor the internal pressure and gas flow rate of the demister in real time. When the monitored values ​​are lower than the set values, the pressure sensor 11 and the flow rate sensor 12 will provide feedback to the PLC 7. The PLC 7 controls the water pump 8 to operate. The water pump 8 delivers water to the diversion valve 9, which diverts most of the water flow into the spray pipe 10 to spray the baffle plate 4 and the membrane layer 5. The water flow passes between the baffle plate 4 and the membrane layer 5 and finally washes the metal wire mesh 2. A small portion of the water flow... The water flow enters the sleeve 16 through the first connecting pipe 17. As the water pressure increases, the second strong magnet 19 moves downward under pressure, and drives the first strong magnet 15 downward through strong magnetic force. This causes the brush 14 to drive multiple scrapers 13 downward, scraping away dirt from the surface of the baffle plate 4 and the membrane layer 5, and brushing the surface of the metal wire mesh 2. When the second strong magnet 19 moves and contacts the surface of the lower rubber block 23, it will squeeze the lower rubber block 23 downward. During the downward movement, the lower rubber block 23 drives the upper rubber block 22 to move through the connecting rod 21. The upper rubber block 22 can drive the lower rubber block 23 to move. When the lower rubber block 23 moves away from the connection between the third connecting pipe 20 and the sleeve 16 and the upper through hole 25, the third connecting pipe 20 and the sleeve 16 are reconnected, and the space between the lower rubber block 23 and the second strong magnet 19 is sealed. Thus, the water flow delivered by the first connecting pipe 17 enters the third connecting pipe 20 and is delivered to the lower end of the sleeve 16 through the third connecting pipe 20. The pressure generated by the downward compression of the second strong magnet 19 causes it to move upward and reset. During the upward movement, the water inside the second strong magnet 19 flows out through the upper through hole 25. When the second strong magnet 19 moves upward and contacts the upper rubber block 22, it causes the upper rubber block 22 to move upward and reset the lower rubber block 23. The water in the third connecting pipe 20 flows out through the lower through hole 26, thus forming a cycle in which the second strong magnet 19 drives the scraper 13 and the brush 14 to clean the metal wire mesh 2, the baffle 4 and the membrane layer 5.

[0056] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A mist eliminator for oil and gas treatment comprising a housing (1), characterized in that: A metal wire mesh (2) is installed on one side of the housing (1). The side of the housing (1) closest to the metal wire mesh (2) is the air inlet and the other end is the air outlet. Multiple demisting units are provided inside the housing (1). Each demisting unit includes two baffles (4) and a membrane layer (5). The membrane layer (5) is located between the two baffles (4). Guide plates (3) are provided on both sides of the baffles (4). The membrane layer (5) and the baffles (4) have the same overall shape. The baffle (4) includes a middle zigzag segment (402) and two end guide segments (403) and streamline segments (401), the guide segments (403) being away from the metal wire mesh (2). A cover plate (6) is installed on the housing (1), a spray unit is provided on the cover plate (6), and a pressure sensor (11) and a flow rate sensor (12) located at the air outlet end inside the housing (1) are installed below the cover plate (6). A scraper (13) is provided between the baffle (4) and the membrane layer (5). The scraper (13) has the same shape as the baffle (4). The two sides of the scraper (13) are respectively attached to the baffle (4) and the membrane layer (5). Both ends of the multiple scrapers (13) are connected to brushes (14). One side of one of the brushes (14) is in contact with the metal wire mesh (2). Both ends of the brushes (14) are equipped with first strong magnets (15). The first strong magnets (15) are provided with a transmission mechanism and a valve mechanism that cooperate with the spray unit. The spray unit includes a PLC (7) and a water pump (8) installed on the cover plate (6). The water pump (8), the air pressure sensor (11) and the flow rate sensor (12) are all electrically connected to the PLC (7). The output end of the water pump (8) is connected to a diversion valve (9). A spray pipe (10) located at the air outlet end inside the housing (1) is installed on the cover plate (6). The spray pipe (10) is connected to the diversion valve (9) through a water pipe. The spraying direction of the spray pipe (10) is directly facing the baffle plate (4) and the membrane layer (5). The transmission mechanism includes a sleeve (16) inserted inside the first strong magnet (15), and the cover plate A first connecting pipe (17) is installed below (6), and the upper end of the first connecting pipe (17) is connected to a water pipe. A second connecting pipe (18) is connected between the sleeve (16) and the first connecting pipe (17) and connected to the diverter valve (9). A second strong magnet (19) is provided inside the sleeve (16). The second strong magnet (19) is magnetically attracted to the first strong magnet (15). A third connecting pipe (20) is provided on one side of the sleeve (16). The two ends of the third connecting pipe (20) are respectively connected to the upper and lower ends of the sleeve (16). The valve mechanism includes a connecting rod (21) inserted inside the second strong magnet (19). An upper rubber block (22) is installed at the upper end of the connecting rod (21), and a lower rubber block (23) is installed at the lower end. A semi-circular ring (24) is installed at the lower end of the upper rubber block (22) at the connection between the sleeve (16) and the third connecting pipe (20). An upper through hole (25) covered by the semi-circular ring (24) is opened on the sleeve (16). A lower through hole (26) is opened at the lowest end of the sleeve (16). The height of the lower rubber block (23) is higher than the height of the connection between the third connecting pipe (20) and the lower end of the sleeve (16). An extension block (27) is installed at the lower end of the second strong magnet (19). The valve mechanism includes a connecting rod (21) inserted inside the second strong magnet (19). An upper rubber block (22) is installed at the upper end of the connecting rod (21), and a lower rubber block (23) is installed at the lower end. A semi-circular ring (24) is installed at the lower end of the upper rubber block (22) at the connection between the sleeve (16) and the third connecting pipe (20). An upper through hole (25) covered by the semi-circular ring (24) is opened on the sleeve (16). A lower through hole (26) is opened at the lowest end of the sleeve (16). The height of the lower rubber block (23) is higher than the height of the connection between the third connecting pipe (20) and the lower end of the sleeve (16). An extension block (27) is installed at the lower end of the second strong magnet (19). The first strong magnet (15) has an opening (29), and the position of the opening (29) is on the same vertical plane as the position of the upper through hole (25).

2. The demister for oil and gas treatment according to claim 1, characterized in that: The angle of the plate bend of the folded segment (402) is 90°. Both the guide segment (403) and the streamline segment (401) have a curved portion with a bending angle of 80°, and the curved portions of the guide segment (403) and the streamline segment (401) are in opposite directions.

3. A demister for oil and gas treatment according to claim 1, characterized in that: The surfaces of the flow guide plate (3), the baffle plate (4) and the membrane layer (5) are all coated with an anti-corrosion and hydrophobic coating.

4. A demister for oil and gas treatment according to claim 1, characterized in that: A rubber pad (28) is installed on the second strong magnet (19). The diameters of the upper rubber block (22) and the lower rubber block (23) are both larger than the diameter of the rubber pad (28), and the diameter of the rubber pad (28) is larger than the diameter of the sleeve (16).

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