Bulk cargo frequency conversion ship energy-saving device

Abstract

The invention relates to an energy-saving device of a bulk cargo frequency conversion ship in the field of flue equipment, which filters hot tail gas in contact with a heat exchange pipe through the heat exchange pipe, a filter disc and a cleaning and dust collecting mechanism arranged in a smoke exhaust pipe, reduces the adhesion of tail gas dust on the heat exchange pipe and improves the heat exchange efficiency; meanwhile, hot tail gas with large kinetic energy is used for driving the impeller to rotate, the impeller drives the scraping disc to do circumferential motion through the rotating shaft, real-time automatic cleaning of the filtering disc is achieved, manual dismounting and cleaning are replaced, and the real-time filtering efficiency of the filtering disc to the hot tail gas is improved; besides, by arranging a dust collecting cover matched with the scraping disc and a dust collecting box communicated with the dust collecting cover, fuel particles and dust which are not fully combusted are collected, follow-up recycling is facilitated, and environmental pollution is reduced; in addition, the blowing assembly is arranged to be matched with the cleaning assembly to clean the filtering holes of the filtering disc, and the energy-saving heat exchange efficiency is further improved.

Description

Technical Field

[0001] The invention relates to a marine energy-saving device, in particular to an energy-saving device for bulk cargo variable frequency ships applied in the field of flue equipment. Background Art

[0002] Frequency conversion bulk carriers are modern ships that combine advanced frequency conversion technology with traditional bulk cargo transportation functions. These ships are designed for efficient and environmentally friendly bulk cargo transportation. They not only inherit the advantages of bulk carriers in transporting bulk goods (such as coal, ore, grain, etc.), but also achieve more sophisticated control and regulation of the ship's power system through integrated frequency conversion technology. In the current operation of marine boilers, the combustion process will produce a large amount of high-temperature exhaust gas, which is directly released into the atmosphere through the exhaust pipe. This practice not only leads to serious environmental pollution problems, but also is accompanied by significant heat loss.

[0003] The existing patent with publication number CN117490085A discloses a marine boiler flue energy-saving device, which relates to the technical field of boiler flue energy-saving. The present invention includes a flue body, an air inlet is opened at the bottom of the flue body, and an air outlet is opened at the top of the flue body; a water inlet pipe is fixed on one side of the flue body, and a water outlet pipe is fixed on one side of the flue body; a first mounting plate is fixed at one end of the water inlet pipe and the water outlet pipe, and the first mounting plate is fixed with a second mounting plate by bolts; a heating pipe is fixed between the two second mounting plates; a filter is fixed at the bottom of the air inlet, and the filter includes a filter shell; mounting grooves are opened on both sides of the filter shell, and positioning plates are fixed on both sides of the mounting grooves, and a tension spring is fixed on one side of the positioning plate. Through the function of the filter, the present invention can flexibly disassemble the filter plate and the heating tube, which is convenient for the user to clean the surface of the heating tube in time, avoiding the inability to fully utilize the heat energy due to excessive accumulation of dust, thereby improving the working efficiency of the flue energy-saving device.

[0004] The above patent recovers heat from boiler exhaust gas by means of heat exchange tubes and filters arranged in the smoke pipe, and carefully filters the exhaust gas through the filter to reduce the adhesion and wrapping of smoke dust on the heat exchange tube, thereby improving the heat exchange efficiency of the energy-saving device. However, the filtering effect of the above filter gradually decreases with the extension of the use time, and it is easy to be blocked to reduce the smoke filtration speed, thereby reducing the heat exchange efficiency of the heat exchange tube of the energy-saving device, and it also needs to be manually disassembled and cleaned, which is cumbersome. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that as the use time of the filter equipment of the existing marine exhaust heat recovery device increases, its filtering efficiency gradually decreases and affects the heat recovery efficiency.

[0006] In order to solve the above problems, the present invention provides an energy-saving device for a bulk cargo variable frequency ship, comprising an exhaust pipe connected to an exhaust pipe of a marine boiler, a plurality of heat exchange pipes distributed at equal distances being fixedly connected in the exhaust pipe, a filter plate fixedly connected to the inner wall of the exhaust pipe being arranged below the heat exchange pipe, the filter plate being provided with a dust cleaning and collecting mechanism, the dust cleaning and collecting mechanism comprising a cleaning component and a dust collecting component, the cleaning component comprising a scraper plate arranged below the filter plate, the scraper plate being provided with a dust collecting groove parallel to the radial direction of the filter plate, a baffle plate arranged along the length direction of the dust collecting groove being fixedly connected at the center position of the dust collecting groove, a gap for dust to pass through being formed between the baffle plate and the inner wall of the dust collecting groove, a scraper strip slidingly abutting against the lower end surface of the filter plate being fixedly connected at the center position of the upper end of the baffle plate; a rotating shaft rotatably connected to the inner end of the scraper plate being fixedly connected, the rotating shaft passing through the filter plate and the upper end of which being fixedly connected with an impeller;

[0007] The dust collecting assembly includes a dust collecting hood which is arranged on the outside of the scraper and fixedly connected to the inner wall of the smoke exhaust pipe, a dust collecting chamber is opened in the dust collecting hood, the dust collecting chamber is connected with a connecting pipe which is fixedly connected to the smoke exhaust pipe, and the outer end of the connecting pipe is connected with a dust collecting box; a movable plate is slidably connected to the side of the dust collecting chamber toward the scraper, and the end of the movable plate away from the scraper is fixedly connected to the inner wall of the dust collecting chamber through a spring support rod, and an extrusion block which cooperates with the scraper is fixedly connected to the upper end of the movable plate; a dust exhaust hole which cooperates with the dust collecting chamber and is connected to the dust collecting groove is opened at the outer end of the scraper, and a breathable plate is fixedly connected to the top of the dust collecting box.

[0008] In the above-mentioned energy-saving device for bulk cargo variable frequency ship, by providing a filter plate and a cleaning and dust collecting mechanism, the real-time cleanliness of the heat exchange tube is improved, thereby improving the heat exchange energy-saving efficiency.

[0009] As a further improvement of the present application, a guide plate is fixedly connected inside the smoke exhaust pipe, the guide plate is provided with a rectangular through hole, the heat exchange tube is installed in the rectangular through hole, a scraper block is provided on the outside of the heat exchange tube and is slidably connected to the scraper block, the scraper block is slidably clamped with an eccentric rod, and the lower end of the eccentric rod is fixedly connected to the rotating shaft.

[0010] As a further improvement of the present application, a blowing assembly is provided above the filter disc and is staggered with the scraper disc. The blowing assembly includes a blowing disc fixedly connected to the rotating shaft, a radial groove and a plurality of blowing holes connected to the radial groove are provided in the blowing disc, the blowing holes are matched with the filter holes, and the blowing holes are located on the front side of the circular motion direction of the scraper strip; the radial groove is connected to an air intake pipe, the air intake pipe is connected to a blower, and the blower is connected to an exhaust pipe; a piston rack is nested in the blower, and an eccentric gear disc is clamped on the piston rack, the eccentric gear disc is rotatably connected to the blowing disc through a rotating shaft, and a gear ring fixedly connected to the inner wall of the smoke exhaust pipe is meshed on the outer side of the eccentric gear disc.

[0011] As a further improvement of the present application, the filter disc is a disc-shaped structure and is provided with multiple groups of filter holes equidistantly distributed around the circumference. The scraper disc is a block structure with a fan-shaped cross-section. A fan-shaped groove is provided on the upper end face of the scraper disc. The dust collecting groove is connected to the fan-shaped groove. The scraper strip is a long strip with an inverted triangular cross-section, and the blocking plate is an arc-shaped plate.

[0012] As a further improvement of the present application, the dust hood includes an annular cylinder with an inner end opening and an inner ring plate fixed to the inner end of the annular cylinder. The inner ring plate is provided with a notch that cooperates with the movable plate, and a pair of bent portions are fixedly connected to the edge of the notch. The pair of bent portions and the inner wall of the annular cylinder enclose a dust collecting chamber.

[0013] As a further improvement of the present application, the movable plate is an arc-shaped plate, the extrusion block is an arc block with a fan-shaped cross-section, and the extrusion block is fixed to the upper part of the inner end surface of the movable plate.

[0014] As a further improvement of the present application, the scraper block is a strip block and is provided with a sliding hole for the heat exchange tube to pass through; the lower end of the scraper block is provided with a longitudinal slide groove arranged along its length direction, and the upper end of the eccentric rod is fixedly connected to an eccentric column, which slides and abuts against the inner wall of the longitudinal slide groove.

[0015] As a further improvement of the present application, one-way valves are provided at the points where both the air inlet pipe and the air exhaust pipe are connected to the blower cylinder.

[0016] As a further improvement of the present application, the piston frame includes a piston disk slidably connected to the inner wall of the blower cylinder and a clamping frame fixedly connected to the piston disk, the clamping frame extends to the outside of the blower cylinder, the upper and lower end surfaces of the eccentric gear disk are provided with eccentric circular grooves, and a pair of sliding columns are provided at the end of the clamping frame, and the sliding columns slide and abut in the eccentric circular grooves.

[0017] To summarize, the present invention filters the hot exhaust gas in contact with the heat exchange tube by means of the heat exchange tube, filter disk and cleaning and dust collecting mechanism arranged in the smoke exhaust tube, thereby reducing the adhesion of exhaust gas dust on the heat exchange tube and improving the heat exchange efficiency; at the same time, the hot exhaust gas with greater kinetic energy is used to drive the impeller to rotate, and the impeller drives the scraper disk to perform circular motion through the rotating shaft, thereby realizing real-time automatic cleaning of the filter disk, replacing manual disassembly and cleaning, and improving the real-time filtering efficiency of the filter disk for the hot exhaust gas; in addition, by providing a dust hood that cooperates with the scraper disk and a dust box that is connected to the dust hood, incompletely burned fuel particles and dust are collected, which is convenient for subsequent recycling and reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0019] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of the present application;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 It is a schematic diagram of the longitudinal cross-sectional structure of the scraper in this application;

[0022] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the scraper in this application;

[0024] Figure 7 This is a schematic diagram of the flow of dust and airflow in the scraper in this application;

[0025] Figure 8 It is a schematic diagram of the movement of the scraper plate and the movable plate in this application;

[0026] Fig. 9 It is a schematic diagram of the explosion assembly of the dust hood in this application;

[0027] Fig.10 This is a schematic diagram of the horizontal cross-sectional structure of the present application at the connecting pipe;

[0028] Fig.11 for Fig.10 Schematic diagram of the enlarged structure at C in the middle;

[0029] Fig.12 It is a schematic diagram of the assembly of the scraper block in this application;

[0030] Fig.13 It is a schematic diagram of the assembly of the blowing disc and the scraping disc in this application;

[0031] Fig.14 It is a schematic cross-sectional structural diagram of the blowing disc in this application;

[0032] Fig.15 It is a flow diagram of the jet airflow in this application.

[0033] Description of the numbers in the figure:

[0034] 1. Exhaust pipe; 2. Filter plate; 201. Filter hole; 3. Rotating shaft; 4. Impeller; 5. Scraper; 501. Arc groove; 502. Dust collecting groove; 503. Dust discharge hole; 6. Blocking plate; 7. Scraper strip; 8. Dust collecting cover; 801. Dust collecting chamber; 802. Annular cylinder; 803. Inner ring plate; 9. Movable plate; 10. Extrusion block; 11. Spring support rod; 12. Connecting pipe; 1 3. Dust box; 14. Breathable plate; 15. Heat exchange tube; 16. Water inlet pipe; 17. Water outlet pipe; 18. Guide plate; 19. Scraper block; 20. Eccentric rod; 2001. Eccentric column; 21. Blowing plate; 2101. Radial groove; 2102. Blowing hole; 22. Inlet pipe; 23. Blower; 24. Exhaust pipe; 25. Piston rack; 26. Eccentric gear plate; 27. Gear ring. DETAILED DESCRIPTION

[0035] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0036] The first implementation method:

[0037] Figure 1-12 The invention discloses an energy-saving device for a bulk cargo variable frequency ship, comprising an exhaust pipe 1 connected to an exhaust pipe of a marine boiler, wherein a plurality of heat exchange pipes 15 distributed at equal distances are fixedly connected in the exhaust pipe 1, a filter disc 2 fixedly connected to the inner wall of the exhaust pipe 1 is arranged below the heat exchange pipe 15, the filter disc 2 is provided with a cleaning and dust collecting mechanism, the cleaning and dust collecting mechanism comprises a cleaning assembly and a dust collecting assembly, the cleaning assembly comprises a scraper disc 5 arranged below the filter disc 2, the scraper disc 5 is provided with a dust collecting groove 502 parallel to the radial direction of the filter disc 2, a baffle plate 6 arranged along the length direction of the dust collecting groove 502 is fixedly connected at the center position thereof, a gap is formed between the baffle plate 6 and the inner wall of the dust collecting groove 502 for dust to pass through, a scraper strip 7 abutting and sliding against the lower end surface of the filter disc 2 is fixedly connected at the center position of the upper end of the baffle plate 6; a rotating shaft 3 rotatably connected to the filter disc 2 is fixedly connected to the inner end of the scraper disc 5, the rotating shaft 3 passes through the filter disc 2 and an impeller 4 is fixedly connected to the upper end thereof;

[0038] For details, please refer to Figure 7 After the hot exhaust gas discharged from the marine boiler enters the exhaust pipe 1, it is filtered by the filter disc 2. The hot exhaust gas filtered by the filter disc 2 drives the impeller 4 to rotate, and the impeller 4 drives the rotating shaft 3 to rotate. The rotating shaft 3 drives the scraper 5 to make a circular motion under the filter disc 2. The scraper 5 drives the scraper bar 7 to clean the lower end surface of the filter disc 2. The cleaned dust falls into the dust collecting tank 502 along with the scraper bar 7;

[0039] See also Figure 8-11The dust collecting assembly includes a dust collecting hood 8 which is arranged on the outside of the scraper 5 and fixedly connected to the inner wall of the smoke exhaust pipe 1, a dust collecting chamber 801 is provided in the dust collecting hood 8, the dust collecting chamber 801 is connected to a connecting pipe 12 which is fixedly connected to the smoke exhaust pipe 1, and the outer end of the connecting pipe 12 is connected to a dust collecting box 13; a movable plate 9 is slidably connected to the dust collecting chamber 801 toward the side of the scraper 5, and the end of the movable plate 9 away from the scraper 5 is fixedly connected to the inner wall of the dust collecting chamber 801 through a spring support rod 11, and an extrusion block 10 which cooperates with the scraper 5 is fixedly connected to the upper end of the movable plate 9, and when the scraper 5 rotates to the position of the movable plate 9, the extrusion block 10 is pressed Extrusion, the extrusion block 10 drives the movable plate 9 to move into the dust collecting chamber 801; the outer end of the scraper 5 is provided with a dust discharge hole 503 which cooperates with the dust collecting chamber 801 and is connected with the dust collecting groove 502. When the movable plate 9 is separated from the scraper 5, the dust in the dust collecting groove 502 enters the dust collecting chamber 801 through the dust discharge hole 503 under the combined action of airflow and centrifugal force, and then enters the dust collecting box 13 through the connecting pipe 12 under the action of airflow. It should be noted that a breathable plate 14 is fixedly connected to the top of the dust collecting box 13, so that the air pressure in the dust collecting box 13 is lower than the air pressure in the smoke exhaust pipe 1, thereby realizing dust collection.

[0040] Compared with the traditional marine boiler energy-saving device, the present invention filters the hot exhaust gas in contact with the heat exchange tube 15 through the heat exchange tube 15 arranged in the smoke exhaust pipe 1 and the filter plate 2 and the cleaning and dust collecting mechanism arranged below the heat exchange tube 15, thereby reducing the adhesion of exhaust gas dust on the heat exchange tube 15 and improving the heat exchange efficiency; at the same time, the hot exhaust gas has a large kinetic energy to drive the impeller 4 to rotate, and the impeller 4 drives the scraper 5 to perform circular motion through the rotating shaft 3, thereby realizing real-time automatic cleaning of the filter plate 2, replacing manual disassembly and cleaning, thereby improving the filtering efficiency of the filter plate 2 for the hot exhaust gas and further improving the utilization efficiency of the exhaust gas heat; in addition, by providing a dust hood 8 coordinated with the scraper 5 and a dust box 13 connected to the dust hood 8, incompletely burned fuel particles and dust are collected, which is convenient for subsequent recycling and reduces environmental pollution.

[0041] See also Figure 5 The filter disc 2 is a disc-shaped structure and is provided with a plurality of groups of filter holes 201 equidistantly distributed around the circumference. The scraper disc 5 is a block-shaped structure with a fan-shaped cross section. A fan-shaped groove 501 is provided on the upper end surface of the scraper disc 5. The dust collecting groove 502 is connected to the fan-shaped groove 501. The scraper strip 7 is a long strip with an inverted triangular cross section, and the blocking plate 6 is an arc-shaped plate.

[0042] Specifically, when the rotating shaft 3 drives the scraper 5 to rotate, the airflow enters the fan-shaped groove 501 and enters the dust collecting groove 502 under the action of the scraper strip 7, and falls to the bottom of the dust collecting groove 502 under the action of the blocking plate 6, thereby improving the collection effect of the scraped dust.

[0043] See also Fig. 9The dust collecting hood 8 includes an annular cylinder 802 with an inner end opening and an inner ring plate 803 fixed to the inner end of the annular cylinder 802. A notch is provided on the inner ring plate 803 to cooperate with the movable plate 9, and a pair of bent portions are fixedly connected to the edge of the notch. The pair of bent portions and the inner wall of the annular cylinder 802 enclose a dust collecting chamber 801.

[0044] Specifically, the dust collecting hood 8 with the dust collecting chamber 801 is used to collect the dust in the rotating scraper disc 5 .

[0045] See also Fig. 9 The movable plate 9 is an arc-shaped plate, and the extrusion block 10 is an arc block with a fan-shaped cross section. The extrusion block 10 is fixed to the upper part of the inner end surface of the movable plate 9.

[0046] Specifically, when the outer end of the scraper 5 contacts and squeezes the extrusion block 10, the extrusion block 10 drives the movable plate 9 to move into the dust collecting chamber 801, so that the dust collecting chamber 801 is connected with the dust discharge hole 503 of the scraper 5 to realize dust discharge.

[0047] See also Fig.12 A guide plate 18 is fixedly connected to the exhaust pipe 1, and a rectangular through hole is opened in the guide plate 18. The heat exchange tube 15 is installed in the rectangular through hole. A scraper block 19 is slidably connected to the outer side of the heat exchange tube 15. The scraper block 19 is slidably connected to the eccentric rod 20, and the lower end of the eccentric rod 20 is fixedly connected to the rotating shaft 3.

[0048] Specifically, when the rotating shaft 3 rotates, it drives the eccentric rod 20 to make a circular motion. The eccentric rod 20 drives the scraper 19 to slide on the surface of the heat exchange tube 15 to scrape off the dust on the surface of the heat exchange tube 15, further improving the cleanliness of the surface of the heat exchange tube 15 and improving the heat exchange efficiency.

[0049] See also Fig.12 The scraper block 19 is a strip block and is provided with a sliding hole for the heat exchange tube 15 to pass through. The lower end of the scraper block 19 is provided with a longitudinal slide groove arranged along its length direction. The upper end of the eccentric rod 20 is fixedly connected with an eccentric column 2001, and the eccentric column 2001 slides and abuts against the inner wall of the longitudinal slide groove; the outer wall of the heat exchange tube 15 slides and abuts against the inner wall of the sliding hole, the right ends of the multiple heat exchange tubes 15 extend to the outside of the smoke exhaust pipe 1 and are connected to the same water inlet pipe 16, and the left ends of the multiple heat exchange tubes 15 extend to the outside of the smoke exhaust pipe 1 and are connected to the same water outlet pipe 17;.

[0050] Specifically, by cleaning the heat exchange tube 15 , the dust that is not filtered by the filter disc 2 and adheres to the heat exchange tube 15 is cleaned.

[0051] Second implementation method:

[0052] Figure 3 , Fig.13 , Fig.14 and Fig.15The invention shows an energy-saving device for a bulk cargo variable frequency ship. On the basis of the first embodiment, a blowing assembly staggered with the scraper disc 5 is provided above the filter disc 2. The blowing assembly includes a blowing disc 21 fixedly connected to the rotating shaft 3. A radial groove 2101 and a plurality of blowing holes 2102 connected to the radial groove 2101 are provided in the blowing disc 21. The blowing holes 2102 are arranged in cooperation with the filter holes 201, and the blowing holes 2102 are located at the front side of the circular motion direction of the scraper strip 7. The radial groove 2101 is connected to an air inlet pipe 22, the air inlet pipe 22 is connected to a blower cylinder 23, and the blower cylinder 23 is connected to an exhaust pipe 24. A piston rack 25 is nested in the blower cylinder 23, and an eccentric gear disc 26 is clamped on the piston rack 25. The eccentric gear disc 26 is rotatably connected to the blowing disc 21 through a rotating shaft, and a gear ring 27 fixedly connected to the inner wall of the smoke exhaust pipe 1 is meshed on the outer side of the eccentric gear disc 26.

[0053] For details, please refer to Fig.15 When the rotating shaft 3 drives the scraper 5 to make a circular motion, it also drives the blowing plate 21 to make a circular motion. At the same time, the eccentric gear plate 26 rolls on the gear ring 27, and the eccentric gear plate 26 drives the piston frame 25 to move back and forth horizontally in the blower 23. The blower 23 draws the filtered exhaust gas from the outside into itself through the exhaust pipe 24 and injects the filtered exhaust gas into the radial groove 2101 through the intake pipe 22, and then sprays it out from the blowing hole 2102. When the holes 201 are opposite to each other, the filtered exhaust gas is blown back to the filter holes 201 to clean the residual dust in the filter holes 201. Since the scraper plate 5 and the blowing plate 21 are staggered, when the dust in the filter holes 201 is blown out, as the scraper plate 5 rotates, the dust is blocked by the scraper strip 7 and falls into the dust collecting groove 502, thereby further improving the cleaning effect and dust collection effect of the filter plate 2, thereby further improving the filtering efficiency of the filter plate 2 for the exhaust gas, thereby improving the heat exchange efficiency.

[0054] See also Fig.14 Both the air inlet pipe 22 and the air exhaust pipe 24 are provided with a one-way valve at the connection points with the blower cylinder 23.

[0055] Specifically, the one-way valve arranged on the intake pipe 22 allows the airflow to flow into the intake pipe 22 only from the blower 23, and the one-way valve arranged on the exhaust pipe 24 allows the airflow to enter the blower 23 only from the exhaust pipe 24, thereby realizing the one-way flow of the exhaust gas.

[0056] See also Fig.14 The piston frame 25 includes a piston disc slidably connected to the inner wall of the blower cylinder 23 and a clamping frame fixedly connected to the piston disc. The clamping frame extends to the outside of the blower cylinder 23. The upper and lower end surfaces of the eccentric gear disc 26 are both provided with eccentric circular grooves. A pair of sliding columns are provided at the end of the clamping frame, and the sliding columns slide and abut in the eccentric circular grooves.

[0057] Specifically, when the eccentric gear plate 26 rotates, the sliding column slides in the eccentric circular groove, so that the clamping frame drives the piston plate to slide back and forth horizontally in the blower cylinder 23, thereby realizing the suction and injection of airflow.

[0058] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A bulk cargo variable frequency ship energy saving device, characterized in that: The invention comprises a smoke exhaust pipe (1) connected to an exhaust pipe of a marine boiler, a plurality of heat exchange pipes (15) distributed at equal intervals are fixedly connected in the smoke exhaust pipe (1), a filter plate (2) fixedly connected to the inner wall of the smoke exhaust pipe (1) is arranged below the heat exchange pipe (15), the filter plate (2) is provided with a cleaning dust collection mechanism, the cleaning dust collection mechanism comprises a cleaning component and a dust collection component, the cleaning component comprises a scraper plate (5) arranged below the filter plate (2), the scraper plate (5) is provided with a dust collection groove (50) parallel to the radial direction of the filter plate (2) 2), a baffle plate (6) arranged along the length direction of the dust collecting groove (502) is fixedly connected at the center position of the dust collecting groove (502), a gap for dust to pass through is formed between the baffle plate (6) and the inner wall of the dust collecting groove (502), a scraper strip (7) abutting and sliding against the lower end surface of the filter disc (2) is fixedly connected at the center position of the upper end of the baffle plate (6); a rotating shaft (3) rotatably connected to the filter disc (2) is fixedly connected at the inner end of the scraper disc (5), the rotating shaft (3) passes through the filter disc (2) and an impeller (4) is fixedly connected at the upper end thereof; The dust collecting assembly comprises a dust collecting hood (8) arranged on the outside of the scraper (5) and fixedly connected to the inner wall of the smoke exhaust pipe (1), a dust collecting chamber (801) is provided in the dust collecting hood (8), the dust collecting chamber (801) is connected to a connecting pipe (12) fixedly connected to the smoke exhaust pipe (1), and the outer end of the connecting pipe (12) is connected to a dust collecting box (13); a movable plate (9) is slidably connected to the side of the dust collecting chamber (801) facing the scraper (5), the end of the movable plate (9) away from the scraper (5) is fixedly connected to the inner wall of the dust collecting chamber (801) through a spring support rod (11), and the upper end of the movable plate (9) is fixedly connected to an extrusion block (10) matched with the scraper (5); a dust discharge hole (503) matched with the dust collecting chamber (801) and connected to the dust collecting groove (502) is provided at the outer end of the scraper (5), and a ventilation plate (14) is fixedly connected to the top of the dust collecting box (13).

2. The energy-saving device for bulk cargo frequency conversion ship according to claim 1 is characterized in that: A guide plate (18) is fixedly connected inside the smoke exhaust pipe (1), the guide plate (18) is provided with a rectangular through hole, the heat exchange tube (15) is installed in the rectangular through hole, a scraper block (19) is sleeved on the outside of the heat exchange tube (15) and is slidably connected to the scraper block (19), an eccentric rod (20) is slidably engaged with the scraper block (19), and the lower end of the eccentric rod (20) is fixedly connected to the rotating shaft (3).

3. The energy-saving device for bulk cargo variable frequency ship according to claim 2 is characterized in that: A spray assembly is arranged above the filter disc (2) and is staggered with the scraper disc (5). The spray assembly comprises a spray disc (21) fixedly connected to the rotating shaft (3). A radial groove (2101) and a plurality of spray holes (2102) connected to the radial groove (2101) are provided in the spray disc (21). The spray holes (2102) are arranged in coordination with the filter holes (201), and the spray holes (2102) are located on the front side of the circular motion direction of the scraper bar (7); the radial groove (2101) is connected to an air intake pipe (22), the air intake pipe (22) is connected to a blower cylinder (23), and the blower cylinder (23) is connected to an exhaust pipe (24); a piston rack (25) is nested in the blower cylinder (23), an eccentric gear disc (26) is clamped on the piston rack (25), the eccentric gear disc (26) is rotatably connected to the blowing disc (21) via a rotating shaft, and the outer side of the eccentric gear disc (26) is meshed with a gear ring (27) fixedly connected to the inner wall of the smoke exhaust pipe (1).

4. The energy-saving device for bulk cargo variable frequency ship according to claim 1 is characterized in that: The filter disc (2) is a disc-shaped structure and is provided with a plurality of groups of filter holes (201) distributed equidistantly around the circumference. The scraper disc (5) is a block-shaped structure with a fan-shaped cross section. The upper end surface of the scraper disc (5) is provided with a fan-shaped groove (501). The dust collecting groove (502) is connected to the fan-shaped groove (501). The scraper strip (7) is a long strip with an inverted triangular cross section. The blocking plate (6) is an arc-shaped plate.

5. The energy-saving device for bulk cargo variable frequency ship according to claim 1 is characterized in that: The dust collecting hood (8) comprises an annular cylinder (802) with an inner end opening and an inner ring plate (803) fixed to the inner end of the annular cylinder (802); a notch is provided on the inner ring plate (803) to match the movable plate (9); and a pair of bent portions are fixedly connected to the edge of the notch; the pair of bent portions and the inner wall of the annular cylinder (802) enclose a dust collecting chamber (801).

6. The energy-saving device for bulk cargo variable frequency ship according to claim 1, characterized in that: The movable plate (9) is an arc-shaped plate, and the extrusion block (10) is an arc block with a fan-shaped cross section. The extrusion block (10) is fixed to the upper part of the inner end surface of the movable plate (9).

7. The energy-saving device for bulk cargo variable frequency ship according to claim 2 is characterized in that: The scraper block (19) is a strip block and is provided with a sliding hole for the heat exchange tube (15) to pass through; the lower end of the scraper block (19) is provided with a longitudinal sliding groove arranged along its length direction; the upper end of the eccentric rod (20) is fixedly connected with an eccentric column (2001), and the eccentric column (2001) is in sliding contact with the inner wall of the longitudinal sliding groove.

8. The energy-saving device for bulk cargo variable frequency ship according to claim 3 is characterized in that: Both the air inlet pipe (22) and the air exhaust pipe (24) are provided with a one-way valve at the connection points with the blower cylinder (23).

9. The energy-saving device for bulk cargo variable frequency ship according to claim 3, characterized in that: The piston frame (25) comprises a piston disc slidably connected to the inner wall of the blower cylinder (23) and a clamping frame fixedly connected to the piston disc, the clamping frame extending to the outside of the blower cylinder (23), the upper and lower end surfaces of the eccentric gear disc (26) are both provided with eccentric circular grooves, and a pair of sliding columns are provided at the end of the clamping frame, and the sliding columns are slidably abutted in the eccentric circular grooves.

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