Titanium plate heat exchanger for offshore wind power converter station

Abstract

The application relates to the technical field of wind power converter stations, in particular to a titanium plate type heat exchanger for a marine wind power converter station. The titanium plate type heat exchanger comprises a pre-filter arranged at a refrigerant inlet of a titanium plate heat exchanger. After passing through the pre-filter, the refrigerant enters heat exchange plates of the titanium plate heat exchanger through the refrigerant inlet and cools down the heat medium in the heat exchange plates. A lower partition plate is arranged between a lower shell and a middle shell of the pre-filter. An upper partition plate is arranged between the middle shell and an upper shell of the pre-filter. A filtering assembly is installed in the middle shell through the upper partition plate and the lower partition plate. A self-cleaning assembly is arranged in the filtering assembly. The self-cleaning assembly is driven by a rotary actuator and a cylinder to change the passage of the filtering assembly, so as to remove the attachments on a filter screen cylinder of the filtering assembly and discharge the attachments from a blowdown port in the lower shell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power converter stations, in particular to a titanium plate heat exchanger for an offshore wind power converter station. BACKGROUND

[0002] The key components in the offshore wind power converter station, such as IGBT (Insulated Gate Bipolar Transistor) modules, transformers, reactors, DC capacitors and AC filters, will generate a large amount of heat during the process of power conversion and transmission. If the heat cannot be dissipated in time, it will cause the device temperature to be too high, reduce efficiency, accelerate aging, and even cause insulation failure, short circuit or explosion, etc. faults, which seriously affect the reliability and life of the converter station. The humidity is high and the salt spray corrosion is strong in the offshore environment, and high temperature will exacerbate the oxidation of metals and the deterioration of insulation materials, so a high-efficiency and corrosion-resistant cooling system must be used.

[0003] The offshore wind power converter station can use seawater as a coolant. Seawater is abundant and low in cost and can be obtained directly from the surrounding environment, saving the storage and transportation costs of additional coolant. In addition, seawater has high heat exchange efficiency, large specific heat capacity and sufficient flow, which can quickly remove heat and meet the cooling needs of high-power converter stations. The titanium plate heat exchanger has strong corrosion resistance and compact structure. The plate heat exchanger itself has a high heat transfer coefficient, which can further reduce the size of the equipment and adapt to the limited space on the offshore platform. The high salinity and corrosion of seawater require the heat exchanger to be made of corrosion-resistant materials (such as titanium alloy) and equipped with anti-biofouling measures. SUMMARY

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A titanium plate heat exchanger for an offshore wind power converter station, comprising a pre-filter arranged at the coolant inlet of the titanium plate heat exchanger. After passing through the pre-filter, the coolant enters the heat exchange plates of the titanium plate heat exchanger through the coolant inlet and cools down the heat medium in the heat exchange plates. A lower partition plate is arranged between the lower shell and the middle shell of the pre-filter. An upper partition plate is arranged between the middle shell and the upper shell of the pre-filter. The filter assembly is installed in the middle shell through the upper partition plate and the lower partition plate. A self-cleaning assembly is arranged in the filter assembly. A rotary actuator and a gas cylinder are arranged outside the upper shell and are in transmission connection with the self-cleaning assembly. The self-cleaning assembly is driven by the rotary actuator and the gas cylinder to change the passage of the filter assembly, so as to remove the attachments on the filter screen cylinder of the filter assembly and discharge them from the blowdown port in the lower shell.

[0006] Further, the self-cleaning assembly is provided with a linkage assembly; the cylinder drives the upper turret of the self-cleaning assembly to lower and close the port of the filter screen cylinder at the upper baffle; the upper turret drives the lower turret to move up through the linkage assembly and make the interface seat of the lower turret butt joint with the port of the filter screen cylinder at the lower baffle; the interface seat communicates with the blowdown port through the blowdown pipe.

[0007] Further, the lower baffle makes the lower cavity in the lower shell; the lower baffle and the upper baffle make the middle cavity in the middle shell; the lower port of the filter screen cylinder of the filter assembly is arranged in the lower through hole of the lower baffle; the upper port of the filter screen cylinder is arranged in the upper through hole of the upper baffle; the refrigerant enters the lower cavity through the inlet of the lower shell, then enters the filter screen cylinder through the lower through hole; the refrigerant enters the middle cavity after being filtered by the cylinder wall of the filter screen cylinder; the filtered refrigerant flows out from the outlet of the middle shell and enters the refrigerant inlet of the titanium plate heat exchanger.

[0008] Further, the filter assembly has a plurality of filter screen cylinders; the upper turret closes the upper ports of some filter screen cylinders and leaves the upper ports of the other filter screen cylinders open; the lower turret makes the lower ports of the filter screen cylinders to communicate with the blowdown pipe; the refrigerant enters the middle cavity through the filter screen cylinders with open upper ports; the refrigerant in the middle cavity enters the filter screen cylinders reversely through the cylinder walls of the filter screen cylinders with closed upper ports and impacts the attachments on the inner walls of the filter screen cylinders; the attachments are discharged through the blowdown pipe and the blowdown port.

[0009] Further, the central column of the self-cleaning assembly is rotatably arranged in the middle part of the upper baffle and the lower baffle; the lower end of the column body of the central column is provided with the lower turret below the lower baffle; the upper end of the column body is provided with the upper turret above the upper baffle.

[0010] Further, the upper end of the central column is provided with a gear; the gear is rotatably supported on the first support on the upper shell; the rotary actuator is fixed on the first support; the output end of the rotary actuator is in transmission connection with the gear.

[0011] Further, the middle part of the interface seat of the lower turret is provided with a pull rod; the pull rod is in the interior of the column body and can slide relatively to the column body under the driving of the linkage assembly; the upper end of the pull rod is arranged in the upper support of the linkage assembly in the upper part of the column body; the sliding seat of the upper turret is inserted into the upper support; the pressing rod is arranged on the sliding seat.

[0012] Further, the upper end of the gear is provided with a rotating disc; the rotating disc is rotatably supported on the second support on the upper shell; the rotating disc is provided with a cylinder; the movable end of the cylinder is connected with the pressing rod.

[0013] Further, the middle part of the upper support is provided with a limiting cylinder, the upper end of the pull rod is arranged in the limiting cylinder, a limiting hole extending horizontally is arranged on the limiting cylinder, the upper end of the pull rod is provided with an inclined hole, the inclined rod of the middle part of the actuating block of the linkage assembly is arranged in the inclined hole, the limiting faces at both ends of the actuating block are matched with the limiting hole, the lower part of the sliding seat is provided with a wedge block, the wedge block is engaged with the wedge faces at both ends of the actuating block, the sliding seat moves up and down to push the actuating block to move horizontally through the wedge block, and the actuating block moves horizontally to drive the pull rod to move up and down.

[0014] Further, the first baffle and the second baffle are arranged at the adjacent two lower through holes on the lower partition plate respectively, when the interface seat of the lower rotating frame is rotated to the first baffle, the lower rotating frame can close the filter screen cylinder of the first part, and when the interface seat is rotated to the second baffle, the lower rotating frame can close the filter screen cylinder of the remaining part.

[0015] Advantages

[0016] Compared with the prior art, the application provides a titanium plate heat exchanger for a marine wind power converter station, which has the following beneficial effects: a pre-filter is arranged in front of the titanium plate heat exchanger, seawater can be used as refrigerant from the marine wind power converter station, the operation cost of the marine wind power converter station is reduced, a self-flushing device is arranged in the pre-filter, the attachments on the filter screen cylinder can be removed, a linkage assembly is arranged in the self-flushing device, the sealing structure when the filter screen cylinder is closed is optimized, and the corrosion resistance of the sealing structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the titanium plate heat exchanger for the marine wind power converter station of the application;

[0018] Figure 2 It is a structure schematic view of the pre-filter of the application;

[0019] Figure 3 It is a structure schematic view of the filter assembly of the application;

[0020] Figure 4 It is a schematic view of the self-flushing process of the application;

[0021] Figure 5 It is a structure schematic view of the self-flushing assembly of the application;

[0022] Figure 6 It is a sectional view of the linkage assembly of the application;

[0023] Figure 7 It is a sectional view of another position of the linkage assembly of the application;

[0024] Figure 8 Structure diagram of linkage assembly of the present application in another position;

[0025] Figure 9 Structure diagram of linkage assembly of the present application in another position;

[0026] Figure 10 Structure diagram of self-cleaning assembly actuating mechanism of the present application;

[0027] Figure 11 Structure diagram of self-cleaning assembly actuating mechanism of the present application; Figure 10 Structure diagram of self-cleaning assembly actuating mechanism of the present application;

[0028] Figure 12 Structure diagram of self-cleaning assembly actuating mechanism of the present application;

[0029] Figure 13 Structure diagram of self-cleaning assembly actuating mechanism of the present application;

[0030] Structure diagram of self-cleaning assembly actuating mechanism of the present application;

[0031] Pre-filter 100;

[0032] Lower shell 1, inlet 11, blowdown port 12, lower cavity 13;

[0033] Middle shell 2, outlet 21, middle cavity 22;

[0034] Upper shell 3, first support 31, second support 32;

[0035] Rotary actuator 4; cylinder 5;

[0036] Filter assembly 6, lower partition 61, first baffle 611, second baffle 612, lower through hole 610, upper partition 62, upper through hole 620, filter screen cylinder 63;

[0037] Self-cleaning assembly 7, center column 71, column body 710, upper turret 72, cover 720, sliding seat 721, pressing rod 722, lower turret 73, interface seat 730, pull rod 731, inclined hole 7310, blowdown pipe 74, gear 75, rotating disc 76;

[0038] Linkage assembly 8, actuating block 81, limiting surface 811, wedge surface 812, inclined rod 813, wedge block 82, upper support 83, limiting cylinder 831, limiting hole 832;

[0039] Titanium plate heat exchanger 200; refrigerant inlet 201, heat exchange plate 202; DETAILED DESCRIPTION

[0040] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those ordinarily skilled in the art without creative work fall within the scope of the present application.

[0041] The present application is described in detail below with reference to the accompanying drawings. The titanium plate heat exchanger for offshore wind power converter station of the present application comprises a pre-filter 100 arranged at the refrigerant inlet 201 of the titanium plate heat exchanger 200. After passing through the pre-filter 100, the refrigerant enters the heat exchange plate 202 of the titanium plate heat exchanger 200 through the refrigerant inlet 201 and cools down the heat medium in the heat exchange plate 202. A lower partition plate 61 is arranged between the lower shell 1 and the middle shell 2 of the pre-filter 100. An upper partition plate 62 is arranged between the middle shell 2 and the upper shell 3 of the pre-filter 100. The filter assembly 6 is installed in the middle shell 2 through the upper partition plate 62 and the lower partition plate 61. A self-cleaning assembly 7 is arranged in the filter assembly 6. A rotary actuator 4 and an air cylinder 5 are arranged outside the upper shell 3 and are in transmission connection with the self-cleaning assembly 7. The self-cleaning assembly 7 is driven by the rotary actuator 4 and the air cylinder 5 to change the passage of the filter assembly 6, so as to remove the attachments on the filter screen cylinder 63 of the filter assembly 6 and discharge them from the blowdown opening 12 in the lower shell 1.

[0042] Specifically, the present application is applied to offshore wind power converter station. Therefore, the refrigerant used by the titanium plate heat exchanger 200 is seawater. The offshore wind power converter station is convenient to use seawater. Since the seawater contains a large amount of plankton and other impurities, the filter assembly 6 of the pre-filter 100 is easily blocked by the impurities in the seawater, which affects the working efficiency of the titanium plate heat exchanger 200.

[0043] As Figures 1-4As shown, the filter screen cylinder 63 of the filter assembly 6 is a cylinder structure with both ends open. The refrigerant seawater enters the lower cavity 13 of the lower shell 1 through the inlet 11, then enters the inside of the filter screen cylinder 63 of the filter assembly 6 through the lower partition plate 61, and then passes through the cylinder wall of the filter screen cylinder 63 and is filtered to enter the middle cavity 22 of the middle shell 2. The refrigerant seawater that has not passed through the cylinder wall of the filter screen cylinder 63 continues to rise in the filter screen cylinder 63 and enters the cavity of the upper shell 3 through the upper partition plate 62. The filter screen cylinder 63 is arranged in parallel and has multiple filter screen cylinders. The self-cleaning assembly 7 can close the ports of the filter screen cylinder 63 at the upper partition plate 62 and connect the ports at the lower partition plate 61 with the blowdown outlet 12. The high-pressure refrigerant seawater in the middle cavity 22 passes through the cylinder wall of the filter screen cylinder 63 closed by the self-cleaning assembly 7 and enters the filter screen cylinder 63, thereby impacting the attachments adhered to the inner wall of the filter screen cylinder 63 and sending the attachments into the blowdown outlet 12 through the refrigerant seawater entering the filter screen cylinder 63 in the reverse direction.

[0044] The self-cleaning assembly 7 is provided with a linkage assembly 8. The cylinder 5 drives the upper trolley 72 of the self-cleaning assembly 7 to press down and close the ports of the filter screen cylinder 63 at the upper partition plate 62. The upper trolley 72 drives the lower trolley 73 to move up through the linkage assembly 8 and makes the interface seat 730 of the lower trolley 73 butt joint with the ports of the filter screen cylinder 63 at the lower partition plate 61. The interface seat 730 is connected with the blowdown outlet 12 through the blowdown pipe 74.

[0045] Referring to Figures 4-5 The self-cleaning assembly 7 needs to close part of the filter screen cylinders 63, so that the refrigerant enters the middle cavity 22 through part of the filter screen cylinders 63 that are not closed and enters the part of the filter screen cylinders 63 that are closed in the reverse direction from the middle cavity 22, thereby achieving the cleaning of the attachments of the closed filter screen cylinders 63. After the cleaning is completed, the self-cleaning assembly 7 needs to be moved to close the remaining filter screen cylinders 63 that are not cleaned. The rotary actuator 4 drives the self-cleaning assembly 7 to rotate, thereby achieving the closing and connection of the filter screen cylinders 63 at different positions.

[0046] Since the titanium plate heat exchanger 200 uses seawater as the refrigerant, the seawater has strong corrosiveness. Therefore, the sealing of the self-cleaning assembly 7 when closing the filter screen cylinder 63 needs to reduce the use of rubber sealing materials. Therefore, after the self-cleaning assembly 7 is rotated to change the position, the cylinder 5 is used to drive the upper trolley 72 of the self-cleaning assembly 7 to press down one level and drive the lower trolley 73 to move up, thereby achieving the sealing of the end of the filter screen cylinder 63. The contact parts of the upper trolley 72 and the lower trolley 73 and the ports of the filter screen cylinder 63 can be made of materials that are more resistant to corrosion and have higher hardness, thereby improving the corrosion resistance and durability of the sealing parts.

[0047] The lower partition plate 61 forms a lower cavity 13 in the lower shell 1; the lower partition plate 61 and the upper partition plate 62 form a middle cavity 22 in the middle shell 2; the lower end of the filter screen cylinder 63 of the filter assembly 6 is arranged in the lower through hole 610 of the lower partition plate 61; the upper end of the filter screen cylinder 63 is arranged in the upper through hole 620 of the upper partition plate 62; the refrigerant enters the lower cavity 13 through the inlet 11 of the lower shell 1, and then enters the filter screen cylinder 63 through the lower through hole 610; the refrigerant enters the middle cavity 22 after being filtered by the cylinder wall of the filter screen cylinder 63; and the filtered refrigerant flows out of the outlet 21 of the middle shell 2 and enters the refrigerant inlet 201 of the titanium plate heat exchanger 200.

[0048] The filter assembly 6 has a plurality of filter screen cylinders 63; the upper rotating frame 72 seals the upper end of the filter screen cylinder 63, and the lower rotating frame 73 communicates the lower end of the filter screen cylinder 63 with the blowdown pipe 74; the refrigerant enters the middle cavity 22 through the unsealed filter screen cylinder 63; the refrigerant in the middle cavity 22 reversely enters the inside of the filter screen cylinder 63 through the cylinder wall of the sealed filter screen cylinder 63 and impacts the attachments on the inner wall of the filter screen cylinder 63; and the attachments are discharged through the blowdown pipe 74 and the blowdown outlet 12.

[0049] Referring to the drawings Figure 4 After the lower rotating frame 73 seals the lower end of part of the filter screen cylinder 63, the pressure of the lower cavity 13 to the filter screen cylinder 63 is broken, and at the same time, the pressure in the filter screen cylinder 63 is reduced after the filter screen cylinder 63 is communicated with the blowdown pipe 74, so that the pressure of the refrigerant in the middle cavity 22 is greater than the pressure in the inside of the sealed filter screen cylinder 63, the refrigerant reversely enters the inside of the filter screen cylinder 63 from the middle cavity 22, so as to impact the attachments in the inside of the filter screen cylinder 63 and make them separate, and flow to the blowdown outlet 12 from the blowdown pipe 74.

[0050] The central column 71 of the self-cleaning assembly 7 is rotatably arranged in the middle of the upper partition plate 62 and the lower partition plate 61; the lower end of the column body 710 of the central column 71 is provided with the lower rotating frame 73 below the lower partition plate 61; and the upper end of the column body 710 is provided with the upper rotating frame 72 above the upper partition plate 62.

[0051] Specifically, the filter screen cylinder 63 of the filter assembly 6 has an even number N, the lower rotating frame 73 has N / 2 interface seats, the upper rotating frame 72 has N / 2 coverings 720, and the upper rotating frame 72 and the lower rotating frame 73 rotate synchronously with the column body 710.

[0052] The upper end of the central column 71 is provided with a gear 75; the gear is rotatably supported on the first support 31 of the upper shell 3; the rotary actuator 4 is fixed to the first support 31; and the output end of the rotary actuator 4 is in transmission connection with the gear 75.

[0053] The middle part of the interface seat 730 of the lower rotating frame 73 is provided with a pull rod 731; the pull rod 731 is inside the column 710 and can slide relative to the column 710 under the driving of the linkage assembly 8; the upper end of the pull rod 731 is arranged in the upper support 83 of the linkage assembly 8 on the upper part of the column 710; the sliding seat 721 of the upper rotating frame 72 is inserted in the upper support 83; the sliding seat 721 is provided with a pressing rod 722.

[0054] Specifically, the interface seat 730 has a communicating cavity inside, and the filter screen cylinder 63 and the blowdown pipe 74 can be communicated through the interface seat 730. Referring to FIG. 6, Figure 5 The upper end of the interface seat 730 has an opening, and the lower end of the filter screen cylinder 63 is engaged through the opening. The interface seat 730 is communicated with the blowdown pipe 74 through the communicating pipe.

[0055] The upper end of the gear 75 is provided with a rotating disc 76; the rotating disc 76 is rotatably supported on the second support 32 on the upper shell 3; the rotating disc 76 is provided with a pneumatic cylinder 5; the movable end of the pneumatic cylinder 5 is connected with the pressing rod 722.

[0056] The middle part of the upper support 83 is provided with a limiting cylinder 831, and the upper end of the pull rod 731 is arranged in the limiting cylinder 831; the limiting cylinder 831 is provided with a limiting hole 832 extending transversely; the upper end of the pull rod 731 is provided with an inclined hole 7310; the inclined rod 813 in the middle part of the actuating block 81 of the linkage assembly 8 is arranged in the inclined hole 7310; the limiting faces 811 at both ends of the actuating block 81 cooperate with the limiting hole 832; the lower part of the sliding seat 721 is provided with a wedge block 82; the wedge block 82 is engaged with the wedge faces 812 at both ends of the actuating block 81; when the sliding seat 721 moves up and down, the wedge block 82 pushes the actuating block 81 to move transversely; when the actuating block 81 moves transversely, the actuating block 81 drives the pull rod 731 to move up and down.

[0057] Specifically, referring to FIG. 6, Figures 6-7 When the sliding seat 721 moves downward, the wedge block 82 on the sliding seat 721 pushes the actuating block 81 to move to the left in the upper support 83, Figure 6 When the actuating block 81 moves to the left, the inclined rod 813 in the middle part of the actuating block 81 drives the pull rod 731 to move upward through the inclined hole 7310, that is, through the linkage assembly 8, the upper rotating frame 72 is pressed downward and the upper end of the filter screen cylinder 63 is closed, at the same time, the lower rotating frame 73 is driven to move upward and the lower end of the filter screen cylinder 63 is closed. Through the up-and-down movable upper rotating frame 72 and lower rotating frame 73, a more corrosion-resistant structure can be selected to seal the upper and lower ends of the filter screen cylinder 63, replacing the sealing ring on the upper rotating frame 72 and lower rotating frame 73 in the prior art, and the corrosion resistance of the sealing structure is improved.

[0058] Two adjacent lower through holes 610 on the lower partition plate 61 are respectively provided with a first baffle 611 and a second baffle 612; when the interface seat 730 of the lower rotating frame 73 rotates to the first baffle 611, the lower rotating frame 73 can close the first part of the filter screen cylinder 63; when the interface seat 730 rotates to the second baffle 612, the lower rotating frame 73 can close the remaining part of the filter screen cylinder 63.

[0059] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to these embodiments. Rather, it is the intention that modifications, changes, substitutions and variations be made to the embodiments without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A titanium plate heat exchanger for offshore wind power converter station, comprising a pre-filter (100) arranged at a coolant inlet (201) of the titanium plate heat exchanger (200), characterized in that: the coolant passes through the pre-filter (100) and enters the heat exchange plates (202) of the titanium plate heat exchanger (200) through the coolant inlet (201), and cools down the heat medium in the heat exchange plates (202); a lower partition (61) is arranged between the lower shell (1) and the middle shell (2) of the pre-filter (100); an upper partition (62) is arranged between the middle shell (2) and the upper shell (3) of the pre-filter (100); the filter assembly (6) is installed in the middle shell (2) through the upper partition (62) and the lower partition (61); a self-cleaning assembly (7) is arranged in the filter assembly (6), and a rotary actuator (4) and a gas cylinder (5) are arranged outside the upper shell (3) and are in transmission connection with the self-cleaning assembly (7); the self-cleaning assembly (7) is driven by the rotary actuator (4) and the gas cylinder (5) to change the passage of the filter assembly (6), so as to remove the attachments on the filter screen cylinder (63) of the filter assembly (6) and discharge them from the blowdown port (12) in the lower shell (1); the self-cleaning assembly (7) is provided with a linkage assembly (8); the gas cylinder (5) drives the upper trolley (72) of the self-cleaning assembly (7) to press down and close the port of the filter screen cylinder (63) located at the upper partition (62); the upper trolley (72) drives the lower trolley (73) to move up through the linkage assembly (8) and makes the interface seat (730) of the lower trolley (73) butt joint with the port of the filter screen cylinder (63) located at the lower partition (61); the interface seat (730) is in communication with the blowdown port (12) through a blowdown pipe (74).

2. The titanium plate heat exchanger for offshore wind power converter station according to claim 1, characterized in that: the lower partition (61) forms a lower cavity (13) in the lower shell (1); the lower partition (61) and the upper partition (62) form a middle cavity (22) in the middle shell (2); the lower port of the filter screen cylinder (63) of the filter assembly (6) is arranged in the lower through hole (610) of the lower partition (61); the upper port of the filter screen cylinder (63) is arranged in the upper through hole (620) of the upper partition (62); the coolant enters the filter screen cylinder (63) through the lower through hole (610) after entering the lower cavity (13) through the inlet (11) of the lower shell (1); the coolant enters the middle cavity (22) after being filtered through the cylinder wall of the filter screen cylinder (63); and the filtered coolant flows out from the outlet (21) of the middle shell (2) and enters the coolant inlet (201) of the titanium plate heat exchanger (200).

3. The titanium plate heat exchanger for offshore wind power converter station according to claim 1, characterized in that: the filter assembly (6) has a plurality of filter screen cylinders (63). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The upper turner (72) closes the upper port of the filter screen cylinder (63), and the lower turner (73) communicates the lower port of the filter screen cylinder (63) with the blowdown pipe (74); The refrigerant enters the middle cavity (22) through the unsealed filter screen cylinder (63); The refrigerant in the middle cavity (22) reversely enters the inside of the filter screen cylinder (63) through the wall of the sealed filter screen cylinder (63) and impacts the attachments on the inner wall of the filter screen cylinder (63); The attachments are discharged through the blowdown pipe (74) and the blowdown port (12).

4. The titanium plate heat exchanger for offshore wind power converter station according to claim 3, characterized in that: the central column (71) of the self-cleaning assembly (7) is rotatably arranged in the middle of the upper partition plate (62) and the lower partition plate (61); the lower end of the column body (710) of the central column (71) is provided with the lower turner (73) below the lower partition plate (61); the upper end of the column body (710) is provided with the upper turner (72) above the upper partition plate (62).

5. The titanium plate heat exchanger for offshore wind power converter station according to claim 4, characterized in that: the upper end of the central column (71) is provided with the gear (75); the gear is rotatably supported on the first support (31) on the upper shell (3); the rotary actuator (4) is fixed on the first support (31); the output end of the rotary actuator (4) is in transmission connection with the gear (75).

6. The titanium plate heat exchanger for offshore wind power converter station according to claim 4, characterized in that: the middle of the interface seat (730) of the lower turner (73) is provided with the pull rod (731); the pull rod (731) is inside the column body (710) and can slide relative to the column body (710) under the driving of the linkage assembly (8); the upper end of the pull rod (731) is arranged in the upper support (83) of the linkage assembly (8) on the upper part of the column body (710); the sliding seat (721) of the upper turner (72) is inserted into the upper support (83); the pressing rod (722) is arranged on the sliding seat (721).

7. The titanium plate heat exchanger for offshore wind power converter station according to claim 6, characterized in that: the upper end of the gear (75) is provided with the turntable (76); the turntable (76) is rotatably supported on the second support (32) on the upper shell (3); the turntable (76) is provided with the air cylinder (5); the movable end of the air cylinder (5) is connected with the pressing rod (722).

8. The titanium plate heat exchanger for offshore wind power converter station according to claim 7, characterized in that: the middle of the upper support (83) is provided with the limiting cylinder (831), and the upper end of the pull rod (731) is arranged in the limiting cylinder (831); the limiting cylinder (831) is provided with the limiting hole (832) extending transversely; the upper end of the pull rod (731) is provided with the inclined hole (7310); the inclined rod (813) in the middle of the actuating block (81) of the linkage assembly (8) is arranged in the inclined hole (7310); The limit surface (811) at both ends of the actuating block (81) cooperates with the limit hole (832); The lower part of the sliding seat (721) is provided with a wedge block (82); The wedge block (82) is engaged with the wedge surface (812) at both ends of the actuating block (81); When the sliding seat (721) moves up and down, the actuating block (81) is pushed to move laterally by the wedge block (82); When the actuating block (81) moves laterally, the pull rod (731) is driven to move up and down.

9. The titanium plate heat exchanger for a marine wind power converter station according to claim 8, characterized in that: Two adjacent lower through holes (610) on the lower partition plate (61) are respectively provided with a first baffle (611) and a second baffle (612); When the interface seat (730) of the lower swivel (73) is turned to the first baffle (611), the lower swivel (73) can close the first part of the filter screen cylinder (63); When the interface seat (730) is turned to the second baffle (612), the lower swivel (73) can close the remaining part of the filter screen cylinder (63).

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