Ship dual-fuel main engine flue gas washing water treatment structure and method

Abstract

The present application relates to ship washing water treatment technical field, specifically disclose a kind of ship dual-fuel main engine flue gas washing water treatment structure and method, including processing box, washing water feed assembly, sludge discharge component, floating oil salvage component and clean water filtration discharge component;Sludge discharge component is arranged at the lower end of processing box, floating oil salvage component is arranged at the upper end of processing box, clean water filtration discharge component is arranged above sludge discharge component, and washing water feed assembly is arranged into processing box;The outer end of washing water feed assembly is connected with demulsifier addition premixing component, and micro-bubble generating component is arranged at the side end of processing box;The present application realizes the effective separation between oil and water, so that the water content in the final discharged floating oil is extremely low, avoid the discharged floating oil contains a large amount of moisture and occupies the storage space of waste oil tank on the ship, while the discharged clean water can be treated without rear end, simplify washing water processing procedure, reduce the occupied space of entire system.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ship washing water treatment, and particularly discloses a ship dual-fuel main engine flue gas washing water treatment structure and method. BACKGROUND

[0002] The dual-fuel main engine ship is a ship capable of using diesel and liquefied natural gas as fuel, however, the dual-fuel main engine ship is prone to insufficient fuel combustion, which causes the washing liquid discharged from the flue gas washing tower to contain a large amount of emulsified oil, carbon powder particles and other impurities, and the washing liquid needs to be effectively treated before being discharged.

[0003] The application No. 202311494863.4 discloses a ship iCER dual-fuel main engine flue gas washing water treatment device, which comprises a clear water and oil sludge high-efficiency flotation separation module, an original water and demulsifier mixing demulsification module, a rear-end depth filtration module, a water supplement part arranged at the top of the side wall of the vertical air flotation tank, and a discharge part arranged near the bottom, and finally the control cabinet is electrically connected with input and output components to form a complete set of new washing water treatment device. The demulsifier and the original water are mixed and then flow into the vertical air flotation tank, the oil sludge is automatically discharged from the sludge discharge pipe at the top of the vertical air flotation tank after high-efficiency flotation in the vertical air flotation tank, and the clear water is pumped to the rear-end depth filter for filtration, and the filtered water meets the discharge standard. However, when the washing water after demulsification is separated and filtered, the separation effect is completed by static stratification of the densities of the oil, water and sludge. This separation method cannot ensure that the oil, water and sludge are completely separated, especially the clear water separated needs to be treated twice by the rear-end depth filtration module to meet the discharge standard. In addition, the upper floating oil is discharged by rising of the liquid level, and then is left from the sludge discharge pipe and finally collected in the designated collection tank of the ship. The floating oil separated by this method is mixed with a large amount of water, so that more than half of the internal space of the collection tank is washing water when the floating oil is collected. For the ship, the space volume of the floating oil or sludge collection tank is limited, so that the floating oil separated and treated from the large amount of washing water cannot be collected and treated. Therefore, in view of the above problems of the existing ship iCER dual-fuel main engine flue gas washing water treatment device, the application provides a ship dual-fuel main engine flue gas washing water treatment structure and method which can effectively solve the above technical problems. SUMMARY

[0004] The application aims to provide a ship dual-fuel main engine flue gas washing water treatment structure and method to solve the problem of the existing ship iCER dual-fuel main engine flue gas washing water treatment device in separating the materials after demulsification.

[0005] The application is achieved by the following technical solutions:

[0006] A ship dual-fuel main engine flue gas washing water treatment structure, comprising a treatment box, a washing water feeding assembly, a sludge discharging assembly, a floating oil salvaging assembly and a clean water filtering and discharging assembly;

[0007] The sludge discharging assembly is arranged at the lower end of the treatment box, the floating oil salvaging assembly is arranged at the upper end of the treatment box, the clean water filtering and discharging assembly is arranged above the sludge discharging assembly, and the washing water feeding assembly is arranged in the treatment box between the clean water filtering and discharging assembly and the floating oil salvaging assembly;

[0008] An emulsion breaker adding premixing assembly is connected to the outer end of the washing water feeding assembly, and a micro-bubble generating assembly is arranged at the side end of the treatment box opposite to the washing water feeding assembly;

[0009] The clean water filtering and discharging assembly comprises a perforated plate arranged at the lower end of the inner cavity of the treatment box, a row of filter cartridges sealingly connected to the lower end of the perforated plate, and a filter membrane layer arranged on the outer surface of each filter cartridge, and a suction branch pipe vertically extending downward from each filter cartridge, and a suction main pipe connected to the lower ends of the plurality of suction branch pipes, and a water suction pump connected to the outer end of the suction main pipe extending out of the treatment box;

[0010] The floating oil salvaging assembly comprises an oil suction drum rotatably arranged at the upper end of the inner cavity of the treatment box, a power motor connected to one end of the oil suction drum at the outer end surface of the treatment box, an oil outlet opening arranged at the upper end of the side surface of the treatment box and parallel to the oil suction drum, a scraping plate fixedly installed in the oil outlet opening and abutting against the upper half of the oil suction drum, an oil collecting groove arranged at the outer end of the scraping plate, and an oil discharging pipe connected to the oil collecting groove for directional oil conveying.

[0011] As a further arrangement of the above scheme, two oil suction drums are symmetrically arranged at the upper end of the inner cavity of the treatment box, an oil outlet opening is arranged at the upper end of each side surface of the treatment box, a scraping plate is installed in each oil outlet opening and acts on the corresponding oil suction drum, an oil collecting groove is arranged at the outer end of each scraping plate, and an oil discharging pipe is connected to the lower ends of the two oil collecting grooves through an oil downpipe.

[0012] As a further arrangement of the above scheme, the oil suction drum comprises a cylindrical drum body, a plurality of strip-shaped grooves are circumferentially and uniformly arranged on the outer circular surface of the drum body and arranged in the axial direction, a pushing strip is arranged in each strip-shaped groove, the inner end of the pushing strip and the strip-shaped groove are connected through a guide rod and a spring, an elastic oil absorbing skin layer is arranged on the outer circular surface of the drum body and covers all the pushing strips, a cam ring is fixedly arranged on the inner wall of the treatment box at both ends of the drum body, and a roller member is arranged at the outer side end of each pushing strip and acts on the cam ring.

[0013] As a further arrangement of the above-mentioned scheme, the profile surface of the cam ring is composed of a large-radius arc segment, a small-radius arc segment and transition segments on both sides, and the large-radius arc segment is arranged at the lower half of the cam ring.

[0014] As a further arrangement of the above-mentioned scheme, the washing water feeding assembly comprises a spray pipe extending into the inside of the treatment box and located directly above the filter cartridge, and a booster pump is connected to the outer end of the spray pipe, and a row of spray holes are formed on both sides of the spray pipe in the treatment box.

[0015] As a further arrangement of the above-mentioned scheme, the demulsifier adding premixing assembly comprises a premixing device connected to the outer end of the spray pipe, an additive pipe is connected to the upper end of the premixing device, and a demulsifier tank is connected to the end of the additive pipe through an additive pump.

[0016] As a further arrangement of the above-mentioned scheme, a rotating connecting part is arranged at the bottom of the spray pipe directly above each filter cartridge, a vane shaft is rotatably connected in the rotating connecting part, a follower vane is arranged on the vane shaft extending into the inside of the spray pipe, a U-shaped brush holder is connected to the lower end of the vane shaft, and brush hairs acting on the filter membrane layer of the filter cartridge are arranged at the two side ends of the U-shaped brush holder.

[0017] As a further arrangement of the above-mentioned scheme, two stirring shafts perpendicular to the spray pipe are rotatably arranged in the treatment box above the spray pipe, a stirring motor is connected to the outer end of the stirring shaft, a group of stirring vanes are arranged at the front and rear ends of the stirring shaft in the inside of the treatment box, the micro-bubble generating assembly comprises a micro-bubble generator connected to the side end of the treatment box, and a compressed gas source is connected to the outer end of the micro-bubble generator through a compressed gas pipe.

[0018] As a further arrangement of the above-mentioned scheme, the sludge discharging assembly comprises a discharging cylinder connected to the lower end of the treatment box, a discharging auger vane shaft is rotatably installed in the discharging cylinder, a discharging motor connected to the discharging auger vane shaft is arranged at one end surface of the discharging cylinder, and a sludge outlet is arranged at the lower surface of the other end of the discharging cylinder.

[0019] The application further discloses a washing water treatment method using the ship dual-fuel main engine flue gas washing water treatment structure.

[0020] S1: according to the composition of the ship dual-fuel main engine flue gas washing water, a corresponding amount of demulsifier is used, then the washing water is premixed with the demulsifier, and then the washing water is discharged into the treatment box through the washing water feeding assembly.

[0021] S2: after the premix of demulsifier and washing water enters the treatment box, start the micro-bubble generating assembly to generate a large amount of high-pressure micro-bubbles from the lower end of one side of the treatment box, then the premix is fully mixed under the action of the high-pressure micro-bubbles, so that the oil sludge in the washing water starts to separate under the action of the demulsifier, the separated light oil quickly floats up under the action of the micro-bubbles, and the heavy sludge starts to sink;

[0022] S3: when a large amount of light oil gathers and floats on the upper layer of the liquid level inside the treatment box, the floating oil is removed by the floating oil removal assembly and is transported to the waste oil tank in the ship at a fixed time, and the sinking sludge is quantitatively discharged by the sludge discharge assembly;

[0023] S4: the final clean water filtration and discharge assembly continuously draws clean water in the filter cartridge during operation, and the pressure difference between the inside and outside of the filter cartridge increases, so that the water in the middle layer of the treatment box is fully filtered by the filter membrane layer when entering the inside of the filter cartridge, to ensure that the finally drawn clean water can meet the direct discharge standard.

[0024] Compared with the prior art, the present application has at least the following beneficial effects:

[0025] The ship dual-fuel main engine flue gas washing water treatment structure disclosed in the present application can effectively separate oil and water when treating flue gas washing water containing a large amount of oil sludge. The washing water is first treated by adding a demulsifier to break the emulsion, so that the oil sludge in the washing water loses the emulsion protective layer, and the oil, water and sludge in the washing water are separated and layered. Then, high-pressure micro-bubbles are introduced to accelerate the floating of light oil. The oil drum is continuously rotated above the liquid level to continuously adsorb the floating oil on the liquid level. The oil drum is scraped by the oil scraping plate to remove the floating oil. The water in the upper layer of the liquid is different from the floating oil and cannot be attached to the surface of the oil drum, so that the oil and water are effectively separated. The water content in the finally discharged floating oil is very low, and the storage space of the waste oil tank on the ship is not occupied by the water in the floating oil, so that the ship can treat and collect a large amount of floating oil in the flue gas washing water.

[0026] The oil drum is further improved in structure. During the rotation of the oil drum, the rollers at both ends of the push rod act on the outer cylindrical surface of the cam ring. When the push rod is immersed in the light oil layer during the rotation of the oil drum, the push rod moves downward against the tension of the spring, so that the lower end of the elastic oil absorption skin layer can be fully inserted into the light oil layer and has more contact area with the light oil layer. The elastic oil absorption skin layer absorbs more floating oil. When the oil drum is rotated to the upper half, it returns to a circular shape and is scraped by the oil scraping plate, so that the oil drum can absorb more floating oil at one time and be scraped in time, improving the floating oil removal efficiency. The structure of the oil drum is novel and ingenious, and the effect of absorbing and removing floating oil is better.

[0027] The washing water treatment device in the application directly sets the filter cartridge with the filter membrane layer on the outer surface in the treatment box, and then through the continuous suction of the filter cartridge inside by the suction assembly, the sludge in the clean water can be directly filtered by the filter membrane layer, so that the extracted clean water does not contain sludge, and reaches the standard of direct discharge. In addition, the application is provided with the brushing mechanism on the lower surface of the spray pipe, the high-speed flow of the premixed liquid is used to drive the operation of the brushing mechanism, the filter membrane layer on the outer surface of the filter cartridge can be brushed in real time by the brushing mechanism, so that the filter membrane layer can maintain the high-efficiency filtering and retaining effect for a long time, the discharged clean water does not need to be treated at the back end, the washing water treatment process is simplified, and the occupied space of the whole washing water treatment system is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used for the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 It is a first angle three-dimensional structure schematic view of the application;

[0030] Figure 2 It is a second angle three-dimensional structure schematic view of the application;

[0031] Figure 3 It is a three-dimensional structure schematic view of the inside of the treatment box in the application;

[0032] Figure 4 It is a side view plane structure schematic view of the inside of the treatment box in the embodiment 1 of the application;

[0033] Figure 5 It is a side view plane structure schematic view of the inside of the treatment box in the embodiment 2 of the application;

[0034] Figure 6 It is a three-dimensional structure schematic view of the floating oil salvaging assembly, the spray pipe, the stirring shaft and the like in the application;

[0035] Figure 7 It is a partial section internal structure schematic view of the spray pipe in the application;

[0036] Figure 8 It is a three-dimensional structure schematic view of the oil suction drum in the embodiment 2 of the application;

[0037] Figure 9 It is a three-dimensional assembly schematic view of the oil suction drum in the embodiment 2 of the application;

[0038] Figure 10 It is a three-dimensional structure schematic view of the oil suction drum in the embodiment 2 of the application;Figure 1 Enlarged structural schematic view at A.

[0039] Wherein: 1-treatment box, 2-washing water feeding assembly, 201-jet pipe, 202-boosting pump, 203-jet hole, 204-rotary connection, 205-vane shaft, 206-follower vane, 207-U-shaped brush holder, 208-brush hair, 3-silt discharging assembly, 301-discharging cylinder, 302-discharging auger vane shaft, 303-discharging motor, 304-silt outlet, 4-floated oil salvaging assembly, 401-oil absorption drum, 4011-drum body, 4012-strip-shaped groove, 4013-pushing strip, 4014-guide rod, 4015-spring, 4016-elastic oil absorption skin layer, 4017-cam ring, 4018-roller piece, 402-power motor, 403-oil scraping plate, 404-oil collecting groove, 405-oil discharging pipe, 406-oil discharging pipe, 5-clean water filtering and discharging assembly, 501-hole plate, 502-filter cylinder, 503-suction branch pipe, 504-suction main pipe, 505-water pump, 6-emulsion breaking agent adding and premixing assembly, 601-premixer, 602-agent adding pipe, 603-agent adding pump, 604-emulsion breaking agent tank, 7-micro-bubble generating assembly, 701-micro-bubble generator, 702-compressed gas pipe, 703-compressed gas source, 8-stirring shaft, 801-stirring motor, 802-stirring vane, 9-control box. DETAILED DESCRIPTION

[0040] In order to enable persons skilled in the art to better understand the present application scheme, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should belong to the protection scope of the present application.

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described below in detail with reference to the drawings and in combination with the embodiments. Figures 1-10 The present application will be described in detail below. Embodiment one

[0042] Embodiment 1 discloses a ship dual-fuel main engine flue gas washing water treatment structure, referring to the drawings Figures 1-3, including a treatment tank 1, a washing water feeding assembly 2, a sludge discharging assembly 3, a floating oil salvaging assembly 4, a clean water filtering and discharging assembly 5 and a control box 9. The sludge discharging assembly 3 is arranged at the lower end of the treatment tank 1, the floating oil salvaging assembly 4 is arranged at the upper end of the treatment tank 1, the clean water filtering and discharging assembly 5 is arranged above the sludge discharging assembly 3, and the washing water feeding assembly 2 extends into the treatment tank 1 and is arranged between the clean water filtering and discharging assembly 5 and the floating oil salvaging assembly 4. A demulsifier adding and premixing assembly 6 is connected to the outer end of the washing water feeding assembly 2, and a micro-bubble generating assembly 7 is arranged at the side end of the treatment tank 1 opposite to the washing water feeding assembly 2.

[0043] Reference is made to the accompanying drawings Figure 3 and the accompanying drawings Figure 6 The clean water filtering and discharging assembly 5 comprises a perforated plate 501 arranged at the lower end of the inner cavity of the treatment tank 1, and a row of filter cartridges 502 are arranged on the perforated plate 501 and are in sealing connection with the perforated plate 501 at the lower end. The outer surface of each filter cartridge 502 is provided with a filter membrane layer, which can filter and retain the oil sludge in the treated washing water. A suction branch pipe 503 vertically extends downward from each filter cartridge 502, and the lower ends of the suction branch pipes 503 are connected to a suction main pipe 504. The outer end of the suction main pipe 504 extends out of the treatment tank 1 and is connected to a water suction pump 505.

[0044] Reference is made to the accompanying drawings Figure 1 , the accompanying drawings Figure 3 and the accompanying drawings Figure 10 The washing water feeding assembly 2 comprises a spray pipe 201 extending into the treatment tank 1 and located directly above the row of filter cartridges 502. The outer end of the spray pipe 201 is connected to a booster pump 202, and a row of spray holes 203 are formed on both sides of the spray pipe 201 in the treatment tank 1. The demulsifier adding and premixing assembly 6 comprises a premixer 601 connected to the outer end of the spray pipe 201, and an additive pipe 602 is connected to the upper end of the premixer 601. An additive pump 603 is connected to the end of the additive pipe 602 and a demulsifier tank 604. Before the washing water feeding assembly 2 is connected to the treatment tank 1, the demulsifier in the demulsifier tank 604 is quantitatively added to the premixer 601 by the additive pump 603. Then, the washing water fed by the booster pump 202 is premixed with the demulsifier in the premixer 601, and then discharged from the spray holes 203 on both sides of the spray pipe 201 into the treatment tank 1.

[0045] In addition, two stirring shafts 8 perpendicular to the spray pipe 201 are arranged in the treatment box 1 above the spray pipe 201, the outer end of the stirring shaft 8 is connected with a stirring motor 801, and a group of stirring blades 802 are arranged at the front and rear ends of the stirring shaft 8 inside the treatment box 1. The micro-bubble generating assembly 7 comprises a micro-bubble generator 701 connected to the side end of the treatment box 1, and the outer end of the micro-bubble generator 701 is connected with a compressed gas source 703 through a compressed gas pipe 702. After the pre-mixed solution of washing water and demulsifier is sprayed from the spray hole 203, on the one hand, the stirring blades 802 are stirred to accelerate the reaction between the two, and on the other hand, the high-pressure micro-bubbles introduced by the micro-bubble generator 701 intensify the reaction between the pre-mixed solution, so that the oil, water and mud in the washing water are separated, and the micro-bubbles carry the light oil upwards during the floating process, and finally float on the upper layer of the liquid level.

[0046] Reference is made to the accompanying drawings Figure 3 The sludge discharging assembly 3 comprises a discharging cylinder 301 connected to the lower end of the treatment box 1, a discharging auger shaft 302 is rotatably arranged in the discharging cylinder 301, a discharging motor 303 connected with the discharging auger shaft 302 is arranged on one end surface of the discharging cylinder 301, and a sludge outlet 304 is arranged on the lower surface of the other end of the discharging cylinder 301. When the precipitated sludge is gathered in the discharging cylinder 301 to form a seal, the discharging motor 303 is started to rotate the discharging auger shaft 302, so that the sludge is discharged from the sludge outlet 304.

[0047] Reference is made to the accompanying drawings Figure 4 The floating oil salvaging assembly 4 comprises an oil suction drum 401 rotatably arranged in the upper end of the inner cavity of the treatment box 1, a power motor 402 is connected to one end of the oil suction drum 401 located on the outer end surface of the treatment box 1, an oil outlet parallel to the oil suction drum 401 is formed on the upper end of the side surface of the treatment box 1, an oil scraping plate 403 fixedly arranged in the oil outlet is in close contact with the upper half of the oil suction drum 401, an oil collecting groove 404 is arranged on the outer end of the oil scraping plate 403, and an oil discharging pipe 405 for directional conveying of floating oil is connected to the oil collecting groove 404.

[0048] In specific design, two oil suction drums 401 are symmetrically arranged at the upper end of the inner cavity of the treatment box 1, the oil outlets are formed on the upper ends of the two side surfaces of the treatment box 1, the oil scraping plates 403 corresponding to the oil suction drums 401 are arranged in the oil outlets, the oil collecting grooves 404 are arranged on the outer ends of the oil scraping plates 403, and the lower ends of the two oil collecting grooves 404 are connected with the oil discharging pipe 405 through a lower oil pipe 406.

[0049] The floating oil salvaging assembly 4 in this embodiment 1 is driven by the power motor 402 to rotate the oil suction drum 401 at a certain speed during operation, and the two oil suction drums 401 extend into the upper light oil, the demulsified light oil is continuously attached to the oil suction drum 401, and after rotating upward, it is in contact with the oil scraping plate 403, the auxiliary light oil is scraped by the oil scraping plate 403, and then flows into the oil collecting groove 404, and finally is transported to the waste oil tank in the ship by the oil discharge pipe 405 for collection. Embodiment two

[0050] Embodiment 2 discloses a ship dual-fuel main engine flue gas washing water treatment structure which is improved on the basis of the technical scheme in embodiment 1, and the same parts as embodiment 1 will not be described again.

[0051] Referring to the accompanying drawings Figure 3 and the accompanying drawings Figure 7 , the bottom of the spray pipe 201 directly above each filter cartridge 502 is provided with a rotary connection part 204, a blade shaft 205 is rotatably connected in the rotary connection part 204, a follow-up blade 206 is arranged on the blade shaft 205 extending into the inside of the spray pipe 201, a U-shaped brush holder 207 is connected to the lower end of the blade shaft 205, and brush hairs 208 acting on the filter membrane layer of the filter cartridge 502 are arranged on both sides of the U-shaped brush holder 207. Through the above-mentioned improved design, the pre-mixed liquid entering the spray pipe 201 will act on the follow-up blade 206, so that the blade shaft 205 rotates, and then drives the U-shaped brush holder 207 to rotate in a certain direction. During the rotation of the U-shaped brush holder 207, the filter membrane layer on the outer surface of the corresponding filter cartridge 502 can be cleaned by the brush hairs 208, so that the sludge is prevented from adhering to the surface and affecting the subsequent filtration and retention effect of the sludge water.

[0052] Referring to the accompanying drawings Figure 5 , the accompanying drawings Figure 8 and the accompanying drawings Figure 9 , the oil suction drum 401 in this embodiment 2 comprises a cylindrical drum body 4011, a plurality of axial strip-shaped grooves 4012 are uniformly arranged on the outer circular surface of the drum body 4011, a pushing strip 4013 is arranged in each strip-shaped groove 4012, the inner end of the pushing strip 4013 and the strip-shaped groove 4012 are connected through a guide rod 4014 and a spring 4015, an elastic oil suction skin layer 4016 covering all the pushing strips 4013 is arranged on the outer circular surface of the drum body 4011, a cam ring 4017 is fixed concentrically on the inner wall of the treatment box 1 located at both ends of the drum body 4011, and a roller part 4018 acting with the cam ring 4017 is arranged on the outer side end of each pushing strip 4013. In addition, the profile surface of the cam ring 4017 is composed of a large-radius arc segment, a small-radius arc segment and two transition segments, and the large-radius arc segment is arranged in the lower half of the cam ring 4017.

[0053] The special design of the oil absorption drum 401 in this embodiment 2, during the rotation of the oil absorption drum 401, the rollers 4018 at both ends of the push bar 4013 will act on the outer circular surface of the cam ring 4017, when the push bar 4013 is immersed in the light oil layer while rotating with the oil absorption drum 401, the push bar 4013 will move downward against the pulling force of the spring 4015, so that the lower end of the elastic oil absorption skin layer 4016 can be fully inserted into the light oil layer, and has more contact area with the light oil layer, and absorbs more floating oil through the elastic oil absorption skin layer 4016, and then returns to the circular shape when rotating to the upper half and is completely scraped off by the oil scraping plate 403, so that the oil absorption drum 401 can absorb more floating oil at one time and be scraped off in time, improving the floating oil removal efficiency. Embodiment three

[0054] Embodiment 3 discloses a scrubber water treatment method using the ship dual-fuel main engine flue gas scrubber water treatment structure in embodiment 1 or embodiment 2, comprising the following steps:

[0055] First, according to the composition ratio of the ship dual-fuel main engine flue gas scrubber water, a corresponding amount of demulsifier is used, then the scrubber water is pre-mixed with the demulsifier, and then discharged into the treatment box 1 by the scrubber water feeding assembly 2;

[0056] Second, after the pre-mixed material of the demulsifier and the scrubber water enters the treatment box 1, the micro-bubble generating assembly 7 is started to generate a large amount of high-pressure micro-bubbles from the lower end of one side of the treatment box 1, and then the pre-mixed material is fully mixed under the action of the high-pressure micro-bubbles, so that the oil sludge in the scrubber water begins to separate under the action of the demulsifier, the light oil separated out will quickly float up under the action of the micro-bubbles, and the heavy sludge will begin to sink;

[0057] Third, when a large amount of light oil gathers and floats on the upper layer of the liquid level in the treatment box 1, the floating oil is fished out by the floating oil fishing-out assembly 4 and transported to the waste oil tank in the ship at regular time, and the sinking sludge is quantitatively discharged by the sludge discharging assembly 3;

[0058] Fourth, the clean water filtering and discharging assembly 5 will continuously pump out the clean water in the filter cylinder 502 during operation, and increase the pressure difference between the inside and outside of the filter cylinder 502, when the water in the middle layer of the treatment box 1 enters the inside of the filter cylinder 502, it will be fully filtered by the filter membrane layer, so that the finally pumped-out clean water can meet the direct discharge standard.

[0059] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A marine dual fuel main engine flue gas scrubbing water treatment arrangement, characterized by, The device comprises a treatment box (1), a washing water feeding assembly (2), a sludge discharging assembly (3), a floating oil salvaging assembly (4) and a clean water filtering and discharging assembly (5); The sludge discharging assembly (3) is arranged at the lower end of the treatment box (1), the floating oil salvaging assembly (4) is arranged at the upper end of the treatment box (1), the clean water filtering and discharging assembly (5) is arranged above the sludge discharging assembly (3), and the washing water feeding assembly (2) extends into the treatment box (1) and is arranged between the clean water filtering and discharging assembly (5) and the floating oil salvaging assembly (4); An outer end of the washing water feeding assembly (2) is connected with a demulsifier adding and premixing assembly (6), and a micro-bubble generating assembly (7) is arranged at the side end of the treatment box (1) opposite to the washing water feeding assembly (2); The clean water filtering and discharging assembly (5) comprises a perforated plate (501) arranged at the lower end of the inner cavity of the treatment box (1), a row of filter cartridges (502) are arranged on the perforated plate (501) and are in sealing connection with the perforated plate (501) at the lower end, the outer surface of each filter cartridge (502) is provided with a filter membrane layer, a suction branch pipe (503) vertically extending downwards is arranged in each filter cartridge (502), the lower ends of the suction branch pipes (503) are connected with a suction main pipe (504) in common, and the outer end of the suction main pipe (504) extending out of the treatment box (1) is connected with a water suction pump (505); The floating oil salvaging assembly (4) comprises an oil suction drum (401) rotatably arranged at the upper end of the inner cavity of the treatment box (1), one end of the oil suction drum (401) is connected with a power motor (402) arranged at the outer end surface of the treatment box (1), an oil outlet parallel to the oil suction drum (401) is formed at the upper end of the side surface of the treatment box (1), an oil scraping plate (403) is fixedly arranged in the oil outlet and is in close contact with the upper half of the oil suction drum (401), an oil collecting groove (404) is arranged at the outer end of the oil scraping plate (403), and an oil discharging pipe (405) for directional oil conveying is connected to the oil collecting groove (404); Two oil suction drums (401) are symmetrically arranged at the upper end of the inner cavity of the treatment box (1), an oil outlet is formed at the upper end of each side surface of the treatment box (1), an oil scraping plate (403) corresponding to the oil suction drum (401) is arranged in each oil outlet, an oil collecting groove (404) is arranged at the outer end of each oil scraping plate (403), and the lower ends of the two oil collecting grooves (404) are connected with the oil discharging pipe (405) through an oil downpipe (406). The oil absorption drum (401) comprises a cylindrical drum body (4011), a plurality of strip-shaped grooves (4012) are evenly arranged on the outer circumferential surface of the drum body (4011) in the axial direction, a pushing strip (4013) is arranged in each strip-shaped groove (4012), the inner end of the pushing strip (4013) is connected with the strip-shaped groove (4012) through a guide rod (4014) and a spring (4015), an elastic oil absorption skin layer (4016) covering all the pushing strips (4013) is arranged on the outer circumferential surface of the drum body (4011), a cam ring (4017) is fixedly arranged on the inner wall of the treatment box (1) at both ends of the drum body (4011) in a concentric manner, and a roller (4018) is arranged at the outer end of each pushing strip (4013) and acts on the cam ring (4017). The profile surface of the cam ring (4017) is composed of a large-radius arc segment, a small-radius arc segment and two transition segments, and the large-radius arc segment is arranged in the lower half of the cam ring (4017).

2. The marine dual fuel main engine flue gas scrubbing water treatment arrangement of claim 1, wherein, The washing water feeding assembly (2) comprises a spray pipe (201) extending into the treatment box (1) and located above a row of filter cartridges (502), a booster pump (202) is connected to the outer end of the spray pipe (201), and a row of spray holes (203) are arranged on the two sides of the spray pipe (201) in the treatment box (1).

3. The marine dual fuel main engine flue gas scrubbing water treatment arrangement of claim 2, wherein, The demulsifier adding and premixing assembly (6) comprises a premixer (601) connected to the outer end of the spray pipe (201), an additive pipe (602) is connected to the upper end of the premixer (601), and a demulsifier tank (604) is connected to the end of the additive pipe (602) through an additive pump (603).

4. The marine dual fuel main engine flue gas scrubbing water treatment arrangement of claim 2, wherein, A rotating connection part (204) is arranged at the bottom of the spray pipe (201) above each filter cartridge (502), a blade shaft (205) is rotatably connected in the rotating connection part (204), a follow-up blade (206) is arranged on the blade shaft (205) extending into the spray pipe (201), a U-shaped brush holder (207) is connected to the lower end of the blade shaft (205), and brush hairs (208) acting on the filter membrane layer of the filter cartridge (502) are arranged on the two side ends of the U-shaped brush holder (207).

5. The marine dual fuel main engine flue gas scrubbing water treatment arrangement of claim 2, wherein, Two stirring shafts (8) perpendicular to the spray pipe (201) are rotatably arranged in the treatment box (1) above the spray pipe (201), a stirring motor (801) is connected to the outer end of the stirring shaft (8), a group of stirring blades (802) are arranged at the front and rear ends of the stirring shaft (8) in the treatment box (1), and the micro-bubble generating assembly (7) comprises a micro-bubble generator (701) connected to the side end of the treatment box (1), and a compressed gas source (703) is connected to the outer end of the micro-bubble generator (701) through a compressed gas pipe (702).

6. The marine dual-fuel main engine flue gas scrubbing water treatment arrangement of claim 1, wherein, The sludge discharging assembly (3) comprises a discharging cylinder (301) connected with the lower end of the treatment box (1), a discharging auger shaft (302) is rotatably installed in the discharging cylinder (301), one end surface of the discharging cylinder (301) is provided with a discharging motor (303) connected with the discharging auger shaft (302), and the other end lower surface of the discharging cylinder (301) is provided with a sludge outlet (304).

7. A method of scrubber water treatment using the water treatment structure of the marine dual fuel main engine flue gas scrubber of any of claims 1-6, characterized in that, The method comprises the following steps: S1: according to the composition of the ship dual-fuel main engine flue gas washing water, the amount of demulsifier is used, then the washing water is pre-mixed with the demulsifier, and then the washing water is discharged into the treatment box (1) by the washing water feeding assembly (2); S2: after the pre-mixed material of the demulsifier and the washing water enters the treatment box (1), the micro-bubble generating assembly (7) is started to generate a large amount of high-pressure micro-bubbles from the lower end of one side of the treatment box (1), then the pre-mixed material is fully mixed under the action of the high-pressure micro-bubbles, so that the oil sludge in the washing water starts to separate under the action of the demulsifier, the separated light oil quickly floats up under the action of the micro-bubbles, and the heavy sludge starts to sink; S3: when the light oil is gathered and floats on the upper layer of the liquid level in the treatment box (1), the floating oil is fished out by the floating oil fishing-out assembly (4) and is transported to the waste oil tank in the ship at regular time, and the sinking sludge is quantitatively discharged by the sludge discharging assembly (3); S4: the clear water filtering and discharging assembly (5) continuously discharges the clear water in the filter cylinder (502) during operation, increases the pressure difference between the inside and outside of the filter cylinder (502), and fully filters the water in the middle layer of the treatment box (1) when entering the filter cylinder (502) through the filter membrane layer, so that the finally discharged clear water can meet the direct discharge standard.

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