Filtrate recovery treatment device for large diesel engine tail gas treatment equipment

Abstract

The invention relates to the technical field of filtrate recovery treatment, in particular to a filtrate recovery treatment device for large diesel engine tail gas treatment equipment, which comprises a liquid inlet section, the bottom of the liquid inlet section is communicated with a filter section, the bottom of the filter section is communicated with a purification section, and a graded filter structure is arranged in the filter section; the graded filtering structure comprises a flow guide mechanism, the flow guide mechanism is located in the liquid inlet section, a primary filtering mechanism is arranged at the bottom of the flow guide mechanism, the primary filtering mechanism is connected to the top of the interior of the filtering section in a bolted mode, a re-filtering mechanism is arranged at the bottom of the primary filtering mechanism, and the surface of the re-filtering mechanism is connected with the inner wall of the filtering section. The filtrate recovery treatment device for the large diesel engine tail gas treatment equipment has the advantage that pollutants such as suspended particles, organic matters and heavy metal ions in filtrate can be removed in multiple dimensions through the design of the liquid inlet section, the filtering section and the purifying section.

Description

Technical Field

[0001] The invention relates to the technical field of filtrate recovery and treatment, in particular to a filtrate recovery and treatment device for large diesel engine exhaust gas treatment equipment. Background Art

[0002] As we all know, diesel engines are widely used in trucks, construction machinery and other fields due to their advantages such as high thermal efficiency, good economy, high torque at the same power, and low speed at maximum power. However, the exhaust gas produced during diesel combustion contains a large amount of unburned carbon particles (especially PM2.5 and even finer ultrafine particles), nitrogen oxides (NOx), and liquid hydrocarbon condensate, forming "black smoke" that is seriously polluting the environment. In order to solve the problem of exhaust pollution from diesel engines, many exhaust treatment devices have appeared on the market. These exhaust treatment devices generally adopt wet exhaust treatment systems: by spraying filtrate (usually a water-based solution or urea mixture) in countercurrent contact with the exhaust, the particulate matter is wetted, captured and settled in the filtrate to achieve the purpose of purifying the exhaust gas.

[0003] The method of using filtrate to treat exhaust gas can remove some particulate matter in the exhaust gas to a certain extent, but there is a defect that the filtrate after use is not effectively recycled and treated. The problems of the existing technology are: after repeated recycling, the filtrate will be enriched with high concentrations of suspended particles and dissolved organic matter, and the filtration structure of the existing equipment is usually relatively simple, which makes it difficult to achieve graded filtration of impurities of different sizes in the filtrate, resulting in low filtration efficiency and unsatisfactory filtrate purification effect. In addition, during the filtration process, impurities are easily accumulated on the filter screen, causing filter screen clogging and affecting the normal operation of the equipment. In addition, it is difficult to remove harmful substances such as organic pollutants and heavy metal ions in the filtrate, resulting in the recovered filtrate having low water quality and being unable to meet the reuse requirements, thus limiting the recycling of the filtrate. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a filtrate recovery and treatment device for large diesel engine exhaust treatment equipment, which has the advantage of achieving multi-dimensional removal of pollutants such as suspended particles, organic matter, heavy metal ions, etc. in the filtrate through the design of the liquid inlet section, filtration section and purification section.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a filtrate recovery and treatment device for large diesel engine exhaust treatment equipment, comprising a liquid inlet section, the bottom of which is connected to a filtration section, the bottom of which is connected to a purification section, and a graded filtration structure is provided inside the filtration section; The hierarchical filtering structure comprises a flow guide mechanism inside the liquid inlet section, the bottom of the flow guide mechanism is provided with a primary filter mechanism, the primary filter mechanism is bolted to the top inside the filtering section, and the bottom of the primary filter mechanism is provided with a secondary filter mechanism, and the surface of the secondary filter mechanism is connected with the inner wall of the filtering section.

[0006] By adopting the above technical scheme, the hierarchical filtering structure and the purification section are arranged, the filtrate enters the device, sequentially passes through the primary filtering, secondary filtering of the hierarchical filtering structure, and then is deeply purified in the purification section, multi-dimensional removal of the pollutants such as suspended particles, organic matter and heavy metal ions in the filtrate is realized, the primary filter mechanism and the secondary filter mechanism form a pore size gradient to intercept different sizes of particle impurities, hierarchical filtering of the filtrate is realized, the filtering efficiency and effect are improved, in the filtering process, the flow guide mechanism promotes the vortex flow of the filtrate, the primary filter mechanism and the secondary filter mechanism are coupled to vibrate, the impurities on the filter screen can be effectively removed, and the permeability of the filter screen is maintained.

[0007] The primary filter mechanism comprises a fixed ring, the fixed ring is bolted to the top inside the filtering section, the inside of the fixed ring is bolted with a primary filter metal screen, the top of the primary filter metal screen is rotationally connected with a rotating shaft, the front side of the rotating shaft is bolted with a scraper, the bottom of the scraper is in sliding contact with the surface of the primary filter metal screen, the rear side of the primary filter metal screen and the fixed ring is provided with a notch, and the inside of the notch is provided with a collection box, the rear side of the inside of the fixed ring is provided with a trigger assembly, the trigger assembly is used in cooperation with the scraper and the collection box, respectively, the inner wall of the fixed ring is annularly provided with a first elastic vibration piece, and the first elastic vibration piece is used in cooperation with the primary filter metal screen.

[0008] By adopting the above technical scheme, when the filtrate passes through the primary filter metal screen on the fixed ring, large particle impurities are intercepted, the vortex generated by the flow guide mechanism drives the rotating shaft and the scraper to rotate, the scraper removes the impurities on the primary filter metal screen, when the scraper moves to the trigger assembly, a signal is triggered, the collection box is opened, therefore, the impurities removed by the scraper fall into the collection box, the vortex acts on the first elastic vibration piece to make it vibrate, and the vibration is transmitted to the primary filter metal screen to assist the impurities to fall off, and by cooperation of the scraper and the first elastic vibration piece, mechanical removal and vibration falling are realized, and the cleaning effect is improved.

[0009] The inside of the top of the collection box is rotationally connected with a rotating plate, and the shaft end of the rear side of the rotating plate is connected with a driving motor.

[0010] By adopting the above technical scheme, after the trigger assembly triggers a signal, the driving motor connected with the shaft end of the rotating plate drives the shaft end to rotate, so that the rotating plate opens the channel of the collection box, the removed impurities are scraped into the collection box, and the effect of facilitating collection of the impurities is achieved.

[0011] The present invention is further configured as follows: the trigger assembly includes a static contact, the static contact is bolted to the rear side of the inside of the fixed ring, and a moving contact is provided on the top of the static contact, the moving contact is used in conjunction with the static contact, the top of the moving contact is bolted to a moving rod, and the top of the moving rod is bolted to a pushing protrusion, the surface of the moving rod is sleeved with an elastic diaphragm, and the surface of the elastic diaphragm is connected to the inner wall of the fixed ring, and the moving contact and the static contact are electrically connected to the drive motor.

[0012] By adopting the above technical solution and setting a trigger component, when the scraper moves to the pushing protrusion, since the pushing protrusion is semicircular, the scraper will squeeze the pushing protrusion into the fixed ring. During the movement of the pushing protrusion, the moving contact will be pushed to move by the moving rod, and the elasticity of the elastic diaphragm will be overcome to trigger a signal between the moving contact and the static contact, thereby facilitating the external drive motor to drive the rotating plate to rotate and open the channel. After the scraper is separated from the pushing protrusion, the elasticity of the elastic diaphragm can be used to reset the moving column and the pushing protrusion, so that the moving contact can be separated from the static contact and the signal is disconnected, so that the rotating plate is reset, which is convenient for the next action.

[0013] The present invention is further configured as follows: a sleeve is provided on the top of the rotating shaft, and the top of the rotating shaft extends to the interior of the sleeve and is bolted to a driven gear, the left side of the driven gear is meshed and connected with a driving gear, the top of the driving gear is bolted to a drive shaft, and the top of the drive shaft extends to the interior of the liquid inlet section, and the surface of the drive shaft is provided with vertical blades in a ring shape.

[0014] With the above technical solution, when the filtrate flows through the liquid inlet section, it will push the vertical blades and the drive shaft to rotate, and through the meshing reduction transmission of the driving gear and the driven gear, drive the rotating shaft and the scraper to rotate slowly, so that the scraper can continuously clean the primary filter metal mesh.

[0015] The present invention is further configured as follows: the guide mechanism includes a collar, the collar is bolted to the surface of the liquid inlet section, the top of the collar is rotatably connected to the end face gear ring, and the bottom of the end face gear ring is meshingly connected to a plurality of drive gears, the driving gear is bolted to a connecting shaft on the side close to the liquid inlet section, and the connecting shaft extends to the interior of the liquid inlet section on the side close to the liquid inlet section and is bolted to a guide blade, and the guide blade is arranged in an inclined shape inside the liquid inlet section.

[0016] The above technical solution is adopted, by setting up a guide mechanism, the front connecting shaft is externally connected to a drive motor, the front connecting shaft is driven to rotate by the drive motor, and the other multiple drive gears are rotated synchronously through the meshing connection between the front driving gear and the end face gear ring, so that the guide angle of the guide blade can be adjusted, and then the intensity and direction of the vortex can be controlled. The vortex parameters can be adjusted according to the filtrate flow and impurity conditions through the adjustable guide blades, thereby optimizing the filtration and cleaning effects.

[0017] The present invention is further configured as follows: the re-filtration mechanism includes a ceramic fiber woven mesh arranged in a cone shape, and the surface of the ceramic fiber woven mesh is provided with a super-hydrophobic nano-coating, the bottom of the ceramic fiber woven mesh is bolted with a guide ring, and the surface of the guide ring is connected to the inner wall of the filter section, the bottom of the guide ring is connected to a guide groove, and a movable plate is slidingly arranged inside the guide ring, the bottom of the movable plate is bolted with a plurality of movable columns, and the bottom of the movable column extends to the inside of the guide groove, the surface of the movable column is sleeved with a reset spring, and the top and bottom of the reset spring are respectively connected to the movable plate and the guide ring, the guide ring and the inner wall of the filter section are both provided with a circulation groove, the inner wall of the guide ring is annularly provided with a second elastic vibrator, and the second elastic vibrator is used in conjunction with the ceramic fiber woven mesh.

[0018] The above technical solution is adopted, by setting up a re-filtration mechanism, the filtrate after the initial filtration enters the re-filtration mechanism, and is further filtered through the ceramic fiber woven mesh, so that fine particles are intercepted. Since the surface of the ceramic fiber woven mesh is provided with a super-hydrophobic nano-coating, the super-hydrophobic property causes oil to gather on the surface to form oil droplets, so that the oil droplets and fine particle impurities can flow along the tapered inclined surface of the ceramic fiber woven mesh to the guide ring. As the impurities gather, they act on the movable plate under pressure, causing it to move downward, driving the movable column to slide vertically in the guide groove, and compressing the return spring, so that the movable plate can contact the closure of the flow groove, and the impurities enter the guide groove through the flow groove and the guide ring and are discharged. At the same time, in this process, the eddy current acts on the second elastic vibrator, causing it to vibrate, assisting the ceramic fiber woven mesh to clean impurities, and the filtered filtrate enters the purification section, and the conical ceramic fiber woven mesh increases the filtration area, improves the filtration efficiency, utilizes the characteristics of the super-hydrophobic nano-coating to reduce the adhesion of impurities, and cooperates with the vibration of the second elastic vibrator to enhance the self-cleaning effect.

[0019] The present invention is further configured as follows: the first elastic vibrator and the second elastic vibrator both adopt a cantilever beam structure, one end being a fixed end and the other end being a free end, the fixed ends being fixed to the inner walls of the fixing ring and the guide ring respectively by bolts or welding, and the surfaces of the first elastic vibrator and the second elastic vibrator are both provided with serrated or corrugated protrusions.

[0020] By adopting the above technical solution, the elastic vibrator with an arm beam structure has good elasticity and vibration performance, which can effectively transmit the vibration generated by the eddy current, and the surface raised design increases the friction between the vibrator and the filtrate, improves the vibration cleaning effect, and prevents impurities from adhering.

[0021] The present invention is further configured as follows: the purification section includes a sleeve, the sleeve is bolted to the bottom of the filtration section, the top and bottom of the sleeve are bolted with end covers, the interiors of the two end covers are connected with connecting pipes, and the two connecting pipes are connected with a purification pipe, the interiors of the purification pipe and the connecting pipe are both provided with composite filter membranes, and the surface of the composite filter membrane is loaded with nano-titanium dioxide photocatalysts, the interior of the sleeve is bolted with a UV light source in a ring shape, and a reflective cover is provided on the side of the UV light source close to the inner wall of the sleeve.

[0022] By adopting the above technical solution, a purification section is set up, and the filtered filtrate enters the purification section and enters the purification pipe through the top connecting pipe. Under the filtering action of the composite filter membrane, fine particles and heavy metal ions are removed. At the same time, the UV light source irradiates the nano-titanium dioxide photocatalyst on the composite filter membrane to generate free radicals to decompose organic pollutants, and the reflective cover enhances the utilization rate of light. Through the combination of the composite filter membrane and the photocatalytic technology, the deep purification of the filtrate is achieved and the recovered water quality is improved. The setting of the reflective cover improves the utilization efficiency of UV light and enhances the photocatalytic effect.

[0023] The present invention is further configured as follows: the purification tube is arranged in a spiral shape, and the composite filter membranes are distributed in an equidistant array inside the purification tube.

[0024] By adopting the above technical solution, the composite filter membrane is evenly distributed in the spiral purification tube to ensure that the filtrate passes through evenly and fully contacts the photocatalyst and filter membrane, avoiding short circuits and dead zones, and improving the consistency of the purification effect. The combination of the spiral structure and the evenly spaced filter membrane maximizes the utilization of the purification tube space, extends the residence time of the filtrate, and increases the opportunity for photocatalytic reaction.

[0025] Compared with the prior art, the present invention provides a filtrate recovery and treatment device for large diesel engine exhaust treatment equipment, which has the following beneficial effects: The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment constructs an integrated filtrate treatment system of graded filtration + automatic cleaning + photocatalytic deep purification through the design of the liquid inlet section, filtration section and purification section. Starting from the time the filtrate enters the device, it passes through the primary filtration and secondary filtration of the graded filtration structure, and then to the deep purification of the purification section, realizing multi-dimensional removal of pollutants such as suspended particles, organic matter, and heavy metal ions in the filtrate, solving the problems of incomplete filtrate treatment and poor recovered water quality in the prior art; the self-cleaning mechanisms such as elastic vibrator vibration and scraper scraping in the graded filtration structure, combined with the automatic control of the trigger component, effectively prevent the filter from being blocked, ensuring continuous and stable operation of the equipment, and utilizing the eddy current generated by the guide mechanism and the coupled vibration of the elastic vibrator, as well as the synergistic effect of UV light and nano-titanium dioxide photocatalyst in the purification section, so that the functional modules cooperate with each other, improve the overall treatment efficiency, and realize efficient recovery and treatment of the filtrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 3 Schematic diagram of the primary filtration mechanism structure of the present invention; Figure 4 This is a schematic diagram of the connection between the trigger assembly and the fixing ring in the present invention; Figure 5 Schematic diagram of the connection between the re-filtration mechanism and the filtration section in the present invention; Figure 6 Schematic diagram of the connection between the flow guide mechanism and the liquid inlet section in the present invention; Figure 7 It is a schematic diagram of the purification section structure in the present invention.

[0027] In the figure: 1, liquid inlet section; 2, filtration section; 3, purification section; 31, sleeve; 32, end cover; 33, connecting pipe; 34, purification pipe; 35, composite filter membrane; 36, UV light source; 37, reflector; 4, graded filtration structure; 5, guide mechanism; 51, collar; 52, end face gear ring; 53, driving gear; 54, connecting shaft; 55, guide vane; 6, primary filtration mechanism; 61, fixing ring; 62, primary filter metal mesh; 63, rotating shaft; 64, scraper; 65, collection box; 66, touch screen Activating assembly; 661, static contact; 662, moving contact; 663, moving rod; 664, pushing protrusion; 665, elastic diaphragm; 67, first elastic vibrating plate; 7, re-filtration mechanism; 71, ceramic fiber woven mesh; 72, guide ring; 73, guide groove; 74, moving plate; 75, moving column; 76, return spring; 77, circulation groove; 78, second elastic vibrating plate; 8, rotating plate; 9, casing; 10, driven gear; 11, driving gear; 12, drive shaft; 13, vertical blade. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1: See also Figure 1-6 , a filtrate recovery and treatment device for large diesel engine exhaust treatment equipment, comprising a liquid inlet section 1, the bottom of the liquid inlet section 1 is connected to a filter section 2, the bottom of the filter section 2 is connected to a purification section 3, and a graded filter structure 4 is provided inside the filter section 2; The hierarchical filtering structure 4 comprises a flow guide mechanism 5 inside the liquid inlet section 1, the bottom of the flow guide mechanism 5 is provided with a primary filtering mechanism 6, the primary filtering mechanism 6 is bolted to the top inside the filtering section 2, and the bottom of the primary filtering mechanism 6 is provided with a secondary filtering mechanism 7, the surface of the secondary filtering mechanism 7 is connected with the inner wall of the filtering section 2.

[0030] The primary filtering mechanism 6 comprises a fixed ring 61 bolted to the top inside the filtering section 2, the inside of the fixed ring 61 is bolted with a primary filtering metal mesh 62, the top of the primary filtering metal mesh 62 is rotatably connected with a rotating shaft 63, the front side of the rotating shaft 63 is bolted with a scraper 64, the bottom of the scraper 64 is in sliding contact with the surface of the primary filtering metal mesh 62, the rear side of the primary filtering metal mesh 62 and the fixed ring 61 is provided with a notch, and the inside of the notch is provided with a collection box 65, the rear side of the inside of the fixed ring 61 is provided with a trigger assembly 66, and the trigger assembly 66 is used in cooperation with the scraper 64 and the collection box 65 respectively, the inner wall of the fixed ring 61 is annularly provided with a first elastic vibration piece 67, and the first elastic vibration piece 67 is used in cooperation with the primary filtering metal mesh 62, by setting the primary filtering mechanism 6, when the filtrate passes through the primary filtering metal mesh 62 on the fixed ring 61, large particle impurities are intercepted, the vortex generated by the flow guide mechanism 5 drives the rotating shaft 63 and the scraper 64 to rotate, the scraper 64 removes the impurities on the primary filtering metal mesh 62, when the scraper 64 moves to the trigger assembly 66, a signal is triggered to open the channel of the collection box 65, so that the impurities removed by the scraper 64 fall into the collection box 65, and the vortex acts on the first elastic vibration piece 67 to make it vibrate and transmit the vibration to the primary filtering metal mesh 62 to assist the impurities to fall off, and through the cooperation of the scraper 64 and the first elastic vibration piece 67, mechanical removal and vibration removal are realized, and the cleaning effect is improved.

[0031] The top inside of the collection box 65 is rotatably connected with a rotating plate 8, and the shaft end of the rear side of the rotating plate 8 is connected with a driving motor, by setting the rotating plate 8, after the trigger assembly 66 triggers the signal, the driving motor connected with the shaft end of the rotating plate 8 drives the shaft end to rotate, so that the rotating plate 8 opens the channel of the collection box 65, and the removed impurities are scraped into the collection box 65, which facilitates the collection of impurities.

[0032] Among them, the trigger component 66 includes a static contact 661, which is bolted to the rear side of the inside of the fixed ring 61, and a moving contact 662 is set on the top of the static contact 661. The moving contact 662 is used in conjunction with the static contact 661. The top of the moving contact 662 is bolted with a moving rod 663, and the top of the moving rod 663 is bolted with a pushing protrusion 664. The surface of the moving rod 663 is sleeved with an elastic diaphragm 665, and the surface of the elastic diaphragm 665 is connected to the inner wall of the fixed ring 61. The moving contact 662 and the static contact 661 are electrically connected to the drive motor. By setting the trigger component 66, when the scraper 64 moves to the pushing protrusion 664, the pushing protrusion 664 is set in a semicircular shape, so the scraper 64 will squeeze the pushing protrusion 664 into the fixed ring 61. During the movement of the pushing protrusion 664, the moving contact 662 will be pushed to move through the moving rod 663, and the elasticity of the elastic diaphragm 665 will be overcome, so that the moving contact 662 and the static contact 661 will trigger a signal, thereby facilitating the external drive motor to drive the rotating plate 8 to rotate and open the channel. After the scraper 64 is separated from the pushing protrusion 664, the elasticity of the elastic diaphragm 665 can be used to reset the moving column 75 and the pushing protrusion 664, so that the moving contact 662 can be separated from the static contact 661 and the signal can be disconnected, so that the rotating plate 8 is reset, which is convenient for the next action.

[0033] Among them, a casing 9 is provided on the top of the rotating shaft 63, and the top of the rotating shaft 63 extends to the inside of the casing 9 and is bolted to a driven gear 10. The left side of the driven gear 10 is meshed with a driving gear 11, and the top of the driving gear 11 is bolted to a drive shaft 12, and the top of the drive shaft 12 extends to the inside of the liquid inlet section 1. The surface of the drive shaft 12 is annularly provided with vertical blades 13. When the filtrate flows through the liquid inlet section 1, it will push the vertical blades 13 and the drive shaft 12 to rotate, and through the meshing reduction transmission of the driving gear 11 and the driven gear 10, drive the rotating shaft 63 and the scraper 64 to rotate slowly, so that the scraper 64 can continuously clean the primary filter metal mesh 62.

[0034] Among them, the guide mechanism 5 includes a ring 51, which is bolted to the surface of the liquid inlet section 1, and the top of the ring 51 is rotatably connected to the end face gear ring 52, and the bottom of the end face gear ring 52 is meshed and connected to several driving gears 53. The driving gear 53 is bolted to a connecting shaft 54 ​​on the side close to the liquid inlet section 1, and the connecting shaft 54 ​​extends to the inside of it on the side close to the liquid inlet section 1 and is bolted to a guide blade 55, and the guide blade 55 is arranged in an inclined shape inside the liquid inlet section 1. By setting up the guide mechanism 5, the front connecting shaft 54 ​​is externally connected to a driving motor, and the front connecting shaft 54 ​​is driven by the driving motor to rotate, and the meshing connection between the front driving gear 53 and the end face gear ring 52 causes the other multiple driving gears 53 to rotate synchronously, so that the guide angle of the guide blade 55 can be adjusted, thereby controlling the intensity and direction of the vortex. The adjustable guide blade 55 can adjust the vortex parameters according to the filtrate flow and impurity conditions, thereby optimizing the filtration and cleaning effects.

[0035] The filter element 7 includes a ceramic fiber woven mesh 71 with a conical shape, and the surface of the ceramic fiber woven mesh 71 is provided with a super-hydrophobic nano-coating. The bottom of the ceramic fiber woven mesh 71 is bolted with a guide ring 72, and the surface of the guide ring 72 is connected to the inner wall of the filter section 2. The bottom of the guide ring 72 is connected with a guide groove 73, and a movable plate 74 is slidingly provided inside the guide ring 72. The bottom of the movable plate 74 is bolted with a plurality of movable columns 75, and the bottom of the movable column 75 extends to the inside of the guide groove 73. The surface of the movable column 75 is sleeved with a return spring 76, and the top and bottom of the return spring 76 are respectively connected to the movable plate 74 and the guide ring 72. The guide ring 72 and the inner wall of the filter section 2 are both provided with a flow groove 77. The inner wall of the guide ring 72 is annularly provided with a second elastic vibrating plate 78, and the second elastic vibrating plate 78 is used in conjunction with the ceramic fiber woven mesh 71. By setting the re-filtration mechanism 7, the filtrate after the initial filtration enters the re-filtration mechanism 7 and is further filtered through the ceramic fiber woven mesh 71. Filtering, so that fine particles are intercepted. Since the surface of the ceramic fiber woven mesh 71 is provided with a super-hydrophobic nano-coating, the super-hydrophobic property causes oil to gather on the surface to form oil droplets, so that the oil droplets and fine particle impurities can flow along the inclined surface of the conical ceramic fiber woven mesh 71 to the guide ring 72. As the impurities gather, they act on the movable plate 74 under pressure, causing it to move downward, driving the movable column 75 to slide vertically in the guide groove 73, and compressing the return spring 76, so that the movable plate 74 can contact the closure of the flow groove 77, and the impurities enter the guide groove 73 through the flow groove 77 and the guide ring 72 and are discharged. At the same time, in this process, eddy current acts on the second elastic vibrator 78, causing it to vibrate, assisting the ceramic fiber woven mesh 71 to clean impurities, and the filtered filtrate enters the purification section 3, and the conical ceramic fiber woven mesh 71 increases the filtration area, improves the filtration efficiency, utilizes the characteristics of the super-hydrophobic nano-coating to reduce the adhesion of impurities, and cooperates with the vibration of the second elastic vibrator 78 to enhance the self-cleaning effect.

[0036] Among them, the first elastic vibrator 67 and the second elastic vibrator 78 both adopt a cantilever beam structure, one end of which is a fixed end and the other end is a free end. The fixed ends are respectively fixed to the inner walls of the fixing ring 61 and the guide ring 72 by bolts or welding. The surfaces of the first elastic vibrator 67 and the second elastic vibrator 78 are both provided with serrated or corrugated protrusions. The elastic vibrator with an arm beam structure has good elasticity and vibration performance, and can effectively transmit the vibration generated by the eddy current. The surface protrusion design increases the friction between the vibrator and the filtrate, improves the vibration cleaning effect, and prevents impurities from adhering.

[0037] The working principle of this embodiment is as follows: when the filtrate enters the liquid inlet section 1, the intensity and direction of the filtrate vortex are controlled by the inclined guide blades 55. When the filtrate passes through the primary filter metal mesh 62 on the fixed ring 61, large particles of impurities are intercepted. The filtrate flows through the liquid inlet section 1 and pushes the vertical blades 13 and the drive shaft 12 to rotate. The driving gear 11 and the driven gear 10 engage and reduce the transmission, driving the rotating shaft 63 and the scraper 64 to rotate slowly. The scraper 64 scrapes the impurities on the primary filter metal mesh 62. When the scraper 64 moves to the pushing protrusion 664, the pushing protrusion 664 is squeezed to push the moving contact 662 to move through the moving rod 663, overcoming the elasticity of the elastic diaphragm 665. The moving contact 662 contacts the static contact 661 to trigger the signal. The driving motor drives the rotating plate 8 to rotate, opening the collection box 65 channel, and the impurities fall into the collection box 65. At the same time, the eddy current acts on the first elastic vibration plate 67 to vibrate, and the vibration is transmitted to the primary filter metal mesh 62 to assist in the shedding of impurities. After 64 is separated from the pushing protrusion 664, the elastic diaphragm 665 resets the moving column 75 and the pushing protrusion 664, the moving contact 662 is separated from the static contact 661 to disconnect the signal, and the rotating plate 8 is reset; the filtrate after the initial filtration enters the re-filtration mechanism 7, and is further filtered through the ceramic fiber woven mesh 71, and fine particles are intercepted. Due to the super-hydrophobic nano-coating on the surface of the ceramic fiber woven mesh 71, oil stains gather to form oil droplets, and the oil droplets and fine particle impurities flow along the inclined surface of the conical mesh to the guide ring 72. As impurities accumulate, pressure acts on the moving plate 74 to move it downward, driving the moving column 75 to slide vertically in the guide groove 73, the reset spring 76 is compressed, and the moving plate 74 contacts the closure of the circulation groove 77. Impurities pass through the circulation groove 77 and the guide ring 72 into the guide groove 73 and are discharged. At the same time, eddy current acts on the second elastic vibrator 78 to make it vibrate, assisting the ceramic fiber woven mesh 71 to clean impurities, and the filtered filtrate enters the purification section 3 through the circulation groove 77.

[0038] Example 2: Based on Example 1, Figure 7The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment also includes a purification section 3, wherein the purification section 3 includes a sleeve 31, the sleeve 31 is bolted to the bottom of the filter section 2, the top and bottom of the sleeve 31 are bolted with end caps 32, the interiors of the two end caps 32 are connected with connecting pipes 33, and the two connecting pipes 33 are connected with a purification pipe 34, the interiors of the purification pipe 34 and the connecting pipe 33 are both provided with a composite filter membrane 35, and the surface of the composite filter membrane 35 is loaded with a nano-titanium dioxide photocatalyst, the interior of the sleeve 31 is annularly bolted with a UV light source 36, and the UV light source 36 is close to the sleeve 31. A reflective cover 37 is provided on one side of the inner wall. By setting up the purification section 3, the filtered filtrate enters the purification section 3 and enters the purification pipe 34 through the top connecting pipe 33. Under the filtering action of the composite filter membrane 35, fine particles and heavy metal ions are removed. At the same time, the UV light source 36 irradiates the nano-titanium dioxide photocatalyst on the composite filter membrane 35 to generate free radicals to decompose organic pollutants, and the reflective cover 37 enhances the utilization rate of light. Through the combination of the composite filter membrane 35 and the photocatalytic technology, the deep purification of the filtrate is achieved and the recovered water quality is improved. The setting of the reflective cover 37 improves the utilization efficiency of UV light and enhances the photocatalytic effect.

[0039] Among them, the purification tube 34 is arranged in a spiral shape, and the composite filter membrane 35 is distributed in an equidistant array inside the purification tube 34. The composite filter membrane 35 is equidistantly distributed in the spiral purification tube 34 to ensure that the filtrate passes through evenly and fully contacts the photocatalyst and the filter membrane, avoiding short circuits and dead zones, and improving the consistency of the purification effect. The combination of the spiral structure and the equidistant filter membrane maximizes the utilization of the space in the purification tube 34, extends the residence time of the filtrate, and increases the opportunity for photocatalytic reaction.

[0040] The working principle of this embodiment is as follows: the filtered filtrate enters the purification section 3 and enters the spiral purification tube 34 through the top connecting tube 33. In the purification tube 34, the composite filter membrane 35 plays a filtering role to remove fine particles and heavy metal ions in the filtrate. At the same time, the light emitted by the UV light source 36 irradiates the nano-titanium dioxide photocatalyst loaded on the surface of the composite filter membrane 35, causing it to generate free radicals. These free radicals can decompose organic pollutants in the filtrate. The setting of the reflective cover 37 enhances the utilization rate of UV light and makes the photocatalytic reaction more sufficient. Since the purification tube 34 is spiral and the composite filter membrane 35 is evenly distributed in an array, it ensures that the filtrate passes evenly in the purification tube 34 and fully contacts the photocatalyst and filter membrane, avoiding the occurrence of short circuits and dead zones, extending the residence time of the filtrate, and increasing the opportunity for photocatalytic reaction, thereby achieving deep purification of the filtrate and improving the quality of recovered water.

[0041] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filtrate recovery and treatment device for a large diesel engine exhaust treatment device, comprising a liquid inlet section (1), characterized in that: The bottom of the liquid inlet section (1) is connected to a filtration section (2), the bottom of the filtration section (2) is connected to a purification section (3), and a graded filtration structure (4) is provided inside the filtration section (2); The graded filtration structure (4) comprises a flow guiding mechanism (5), the flow guiding mechanism (5) being located inside the liquid inlet section (1), a primary filtration mechanism (6) being provided at the bottom of the flow guiding mechanism (5), the primary filtration mechanism (6) being bolted to the top of the interior of the filtration section (2), and a secondary filtration mechanism (7) being provided at the bottom of the primary filtration mechanism (6), the surface of the secondary filtration mechanism (7) being connected to the inner wall of the filtration section (2).

2. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 1, characterized in that: The primary filter mechanism (6) comprises a fixing ring (61), the fixing ring (61) being bolted to the top of the inside of the filter section (2), and the fixing ring (61) being bolted with a primary filter metal mesh (62), the top of the primary filter metal mesh (62) being rotatably connected to a rotating shaft (63), and the front side of the rotating shaft (63) being bolted with a scraper (64), the bottom of the scraper (64) being in sliding contact with the surface of the primary filter metal mesh (62), the primary filter metal mesh (62) and the fixing ring (61) being provided with a notch on the rear side, and a collection box (65) being provided inside the notch, a trigger assembly (66) being provided on the rear side of the inside of the fixing ring (61), and the trigger assembly (66) being used in conjunction with the scraper (64) and the collection box (65) respectively, the inner wall of the fixing ring (61) being provided with a first elastic vibrating plate (67) in an annular shape, and the first elastic vibrating plate (67) being used in conjunction with the primary filter metal mesh (62).

3. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 2, characterized in that: The top of the collecting box (65) is rotatably connected to a rotating plate (8), and the shaft end on the rear side of the rotating plate (8) is externally connected to a driving motor.

4. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 3, characterized in that: The trigger assembly (66) includes a static contact (661), the static contact (661) is bolted to the rear side of the interior of the fixed ring (61), and a moving contact (662) is provided on the top of the static contact (661), the moving contact (662) is used in conjunction with the static contact (661), the top of the moving contact (662) is bolted to a moving rod (663), and the top of the moving rod (663) is bolted to a pushing protrusion (664), the surface of the moving rod (663) is sleeved with an elastic diaphragm (665), and the surface of the elastic diaphragm (665) is connected to the inner wall of the fixed ring (61), and the moving contact (662) and the static contact (661) are electrically connected to the drive motor.

5. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 2, characterized in that: A housing (9) is provided on the top of the rotating shaft (63), and the top of the rotating shaft (63) extends to the interior of the housing (9) and is bolted to a driven gear (10), the left side of the driven gear (10) is meshedly connected to a driving gear (11), the top of the driving gear (11) is bolted to a driving shaft (12), and the top of the driving shaft (12) extends to the interior of the liquid inlet section (1), and the surface of the driving shaft (12) is provided with vertical blades (13) in an annular shape.

6. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 1, characterized in that: The guide mechanism (5) comprises a collar (51), the collar (51) being bolted to the surface of the liquid inlet section (1), the top of the collar (51) being rotatably connected to an end face gear ring (52), and the bottom of the end face gear ring (52) being meshingly connected to a plurality of driving gears (53), the driving gear (53) being bolted to a connecting shaft (54) on a side close to the liquid inlet section (1), and the connecting shaft (54) extending to the inside of the side close to the liquid inlet section (1) and being bolted to a guide vane (55), and the guide vane (55) being arranged in an inclined shape inside the liquid inlet section (1).

7. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 2, characterized in that: The re-filtration mechanism (7) includes a ceramic fiber woven mesh (71) arranged in a cone shape, and the surface of the ceramic fiber woven mesh (71) is provided with a super-hydrophobic nano coating, the bottom of the ceramic fiber woven mesh (71) is bolted with a guide ring (72), and the surface of the guide ring (72) is connected to the inner wall of the filter section (2), the bottom of the guide ring (72) is connected to a guide groove (73), and a movable plate (74) is slidably provided inside the guide ring (72), and the bottom of the movable plate (74) is bolted with a plurality of movable columns (7 5), and the bottom of the movable column (75) extends to the inside of the guide groove (73), the surface of the movable column (75) is sleeved with a return spring (76), and the top and bottom of the return spring (76) are respectively connected to the movable plate (74) and the guide ring (72), the inner walls of the guide ring (72) and the filter section (2) are both provided with a flow groove (77), the inner wall of the guide ring (72) is provided with a second elastic vibrating plate (78) in an annular shape, and the second elastic vibrating plate (78) is used in conjunction with the ceramic fiber woven mesh (71).

8. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 7, characterized in that: The first elastic vibrating plate (67) and the second elastic vibrating plate (78) both adopt a cantilever beam structure, one end of which is a fixed end and the other end is a free end, and the fixed ends are respectively fixed to the inner walls of the fixing ring (61) and the guide ring (72) by bolts or welding, and the surfaces of the first elastic vibrating plate (67) and the second elastic vibrating plate (78) are both provided with sawtooth-shaped or corrugated protrusions.

9. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 1, characterized in that: The purification section (3) comprises a sleeve (31), the sleeve (31) being bolted to the bottom of the filter section (2), the top and bottom of the sleeve (31) being bolted to end caps (32), the interiors of the two end caps (32) being connected to connecting pipes (33), and a purification pipe (34) being connected between the two connecting pipes (33), the interiors of the purification pipe (34) and the connecting pipe (33) being provided with composite filter membranes (35), and the surface of the composite filter membrane (35) being loaded with nano-titanium dioxide photocatalysts, the interior of the sleeve (31) being bolted to a UV light source (36) in an annular shape, and a reflective cover (37) being provided on a side of the UV light source (36) close to the inner wall of the sleeve (31).

10. The filtrate recovery and treatment device for large diesel engine exhaust treatment equipment according to claim 9, characterized in that: The purification tube (34) is arranged in a spiral shape, and the composite filter membranes (35) are distributed in an equidistant array inside the purification tube (34).

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