A multi-stage heat exchange evaporative condenser

Abstract

The present invention belongs to the technical field of evaporative condensers, and is particularly an evaporative condenser with multi-stage heat exchange, comprising a shell, an air intake grille is provided on the inner walls of the shell, an evaporative heat exchange coil, a spray component and a precooling heat exchange coil are provided inside the shell, the spray component is located above the evaporative heat exchange coil, the precooling heat exchange coil is located above the spray component, and the precooling heat exchange coil is connected to the evaporative heat exchange coil, and an induced draft fan is provided on the top of the shell. The present invention can scrape and collect impurities attached to the inner wall of the filter cartridge through a scraping and collecting mechanism that moves up and down and rotates, and can make cooling water into a vortex from outside to inside through a recoil mechanism that moves up and down and rotates, and the filter cartridge is recoiled by the vortex, and the impurities flushed down can be collected by the scraping and collecting mechanism, so as to ensure the cleanliness of the circulating water sprayed by the spray component, so that it will not cause clogging of the spray component and will not cause damage to the evaporative heat exchange coil.

Description

Technical Field

[0001] The invention relates to the technical field of evaporative condensers, and in particular to a multi-stage heat exchange evaporative condenser. Background Art

[0002] The evaporative condenser uses water evaporation and forced air circulation to take away the condensation heat, thereby cooling the high-temperature and high-pressure superheated steam discharged from the compressor, condensing the steam into liquid for discharge. It is widely used in the petrochemical, light industry, medicine, food refrigeration and other industries. An ultra-efficient evaporative condenser is made of high-quality galvanized carbon steel. It is reliable to use and has a long service life. The evaporative condenser uses its own independent circulation cooling system and is not affected by other equipment. It is beneficial to equipment maintenance and environmental protection, and has good water-saving and energy-saving effects.

[0003] During the long-term use of the existing evaporative condenser, due to the influence of the external environment on the circulating water, impurities in the air may be continuously accumulated in the circulating water. As the impurities in the circulating water increase, not only will the spray mechanism be blocked, but also the impurity particles sprayed out with the circulating water will hit the heat exchange coil, which is easy to scratch the heat exchange coil and cause damage to the heat exchange coil, thereby affecting the overall heat exchange efficiency of the condenser and possibly shortening the service life of the condenser. For this reason, an evaporative condenser with multi-stage heat exchange is proposed. Summary of the invention

[0004] In order to solve the shortcomings in the prior art, the present invention proposes a multi-stage heat exchange evaporative condenser.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: an evaporative condenser with multi-stage heat exchange, comprising a shell, an air intake grille is arranged on the inner walls around the shell, an evaporative heat exchange coil, a spray piece and a precooling heat exchange coil are arranged inside the shell, the spray piece is located above the evaporative heat exchange coil, the precooling heat exchange coil is located above the spray piece, and the precooling heat exchange coil is connected with the evaporative heat exchange coil, an induced draft fan is arranged on the top of the shell, a water collecting tank is arranged on the bottom inner wall of the shell, a circulating water pump is arranged on the outside of the shell, a conduit 2 is arranged between the circulating water pump and the spray piece, a conduit 1 is fixedly installed through one side of the shell close to the circulating water pump, a filter assembly is arranged between the conduit 1 and the circulating water pump, the filter assembly comprises a detachably connected connector and a cylinder, a filter cartridge is fixedly installed on the connector, a scraping and collecting mechanism for cleaning attachments on the inner wall of the filter cartridge is arranged on the inner side of the filter cartridge, and a recoil mechanism for recoil-flushing the filter cartridge from the outside to the inside is sleeved on the outer side of the filter cartridge.

[0006] Preferably, water inlet and water outlet are provided on both sides of the connecting head, the conduit 1 is fixedly connected to the water inlet, the circulating water pump is communicated with the water outlet, a mounting boss is provided inside the connecting head, the top end of the filter cartridge is fixedly sleeved on the mounting boss, the scraping and collecting mechanism comprises a filter plate 1, the filter plate 1 is slidably connected to the inner wall of the filter cartridge, a plurality of arc-shaped scraping strips 1 distributed in a circular array are fixedly installed on the top of the filter plate 1, the ends of the plurality of arc-shaped scraping strips 1 away from the center of the filter plate 1 are all in contact with the inner wall of the filter cartridge, the same filter plate 2 is fixedly installed on the top of the plurality of arc-shaped scraping strips 1, and the side surface of the filter plate 2 does not contact the inner wall of the filter cartridge.

[0007] Preferably, the filter assembly also includes a connecting mechanism arranged in a connecting head and a cylinder, the connecting mechanism includes two bidirectional screw rods 1 that penetrate through filter plate 1 and are threadedly connected to filter plate 1, the two bidirectional screw rods 1 both penetrate through filter plate 2 and are movably connected to filter plate 2, the connecting head is provided with a driving mechanism, the driving mechanism includes an annular frame and a circular box fixedly installed on the top of the annular frame, the bottom of the circular box is opened, the annular frame and the circular box penetrate through the connecting head and are fixedly connected to the connecting head, a circular plate is rotatably installed in the annular frame, the two bidirectional screw rods 1 both penetrate through the circular plate and are rotatably connected to the circular plate, two spur gears 1 are provided above the circular plate, the tops of the two bidirectional screw rods 1 are respectively fixedly connected to the corresponding spur gears 1, an inner gear ring is fixedly installed on the top inner wall of the circular box, the two spur gears 1 are meshed with the inner gear ring, the two spur gears 1 are previously connected with the same spur gear 2, and a motor is fixedly installed on the top of the circular box, and the output shaft of the motor rotates through the circular box and is fixedly connected to the spur gear 2.

[0008] Preferably, filter plate three is rotatably installed in the cylinder body, the bottom end of the filter cylinder is rotatably connected to the top of filter plate three, a bellows is fixedly installed through the filter plate one, a connecting cylinder is fixedly installed at the bottom end of the bellows, the connecting cylinder penetrates filter plate three and is fixedly connected to filter plate three.

[0009] Preferably, a check valve is provided in the connecting cylinder, a conical collecting filter bucket is rotatably installed in the connecting cylinder, a sewage discharge plate is detachably installed through the bottom of the cylinder, and the bottom end of the conical collecting filter bucket abuts against the top of the sewage discharge plate.

[0010] Preferably, the recoil mechanism includes an annular plate 1 and an annular plate 2 which are slidably mounted on the outside of the filter cartridge, and a plurality of arc-shaped scraper strips 2 distributed in a circular array are fixedly installed between the annular plate 1 and the annular plate 2, and one end of the plurality of arc-shaped scraper strips 2 close to the center of the annular plate 1 is slidably connected to the outside of the filter cartridge.

[0011] Preferably, the two bidirectional screw rods 1 both penetrate the filter plate 3 and are rotatably connected to the filter plate 3, and the bottom ends of the two bidirectional screw rods 1 are fixedly installed with a bevel gear 1, and the connecting mechanism also includes two bidirectional screw rods 2 that penetrate the annular plate 2 and are threadedly connected to the annular plate 2, the two bidirectional screw rods 2 both penetrate the annular plate 1 and are slidably connected to the annular plate 1, the two bidirectional screw rods 2 both penetrate the filter plate 3 and are rotatably connected to the filter plate 3, and the bottom ends of the two bidirectional screw rods 2 are fixedly installed with a bevel gear 4.

[0012] Preferably, the two bevel gears four are meshedly connected with bevel gear three, and the two bevel gears one are meshedly connected with bevel gear two, and two mounting seats are fixedly installed at the bottom of the filter plate three, and a rotating shaft is rotatably installed on the two mounting seats, and the two ends of the two rotating shafts are respectively fixedly connected to the corresponding bevel gear two and bevel gear three.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The scraping and collecting mechanism of the present invention can scrape and collect impurities attached to the inner wall of the filter cartridge by means of the scraping and collecting mechanism that moves up and down and rotates, and can make the cooling water into a vortex from the outside to the inside by means of the recoil mechanism that moves up and down and rotates, and the filter cartridge is recoiled by the vortex, and the impurities flushed down can be collected by the scraping and collecting mechanism, thereby ensuring the cleanliness of the circulating water sprayed by the spray component, preventing the spray component from being blocked, and preventing the evaporative heat exchange coil from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a multi-stage heat exchange evaporative condenser proposed by the present invention;

[0016] Figure 2 A side cross-sectional view of a multi-stage heat exchange evaporative condenser proposed by the present invention;

[0017] Figure 3 This is a schematic structural diagram of a filter assembly in a multi-stage heat exchange evaporative condenser proposed by the present invention;

[0018] Figure 4 A side cross-sectional view of a filter assembly in a multi-stage heat exchange evaporative condenser proposed by the present invention;

[0019] Figure 5 A side cross-sectional view of a connector and a cylinder in a multi-stage heat exchange evaporative condenser proposed by the present invention;

[0020] Figure 6 This is a structural schematic diagram of a scraping and collecting mechanism in a multi-stage heat exchange evaporative condenser proposed by the present invention;

[0021] Figure 7A side sectional view of a driving mechanism in a multi-stage heat exchange evaporative condenser proposed by the present invention and a partial view of two bidirectional screws;

[0022] Figure 8 for Figure 4 A schematic diagram of the enlarged structure of part A;

[0023] Fig. 9 The present invention is a schematic structural diagram of a recoil mechanism in a multi-stage heat exchange evaporative condenser.

[0024] In the figure: 1, shell; 2, air intake grille; 3, evaporative heat exchange coil; 4, spray element; 5, induced draft fan; 6, conduit 1; 7, conduit 2; 8, circulating water pump; 9, filter assembly; 91, connector; 911, water inlet end; 912, water outlet end; 913, mounting boss; 92, cylinder; 921, sewage plate; 93, filter cartridge; 94, driving mechanism; 941, annular frame; 942, circular plate; 943, inner gear ring; 944, spur gear 1; 945, spur gear 2; 946, circular box; 95, scraping and collecting mechanism; 951, filter plate 1; 952, Filter plate two; 953, arc scraper one; 96, recoil mechanism; 961, annular plate one; 962, annular plate two; 963, arc scraper two; 97, connecting mechanism; 971, two-way screw one; 972, bevel gear one; 973, mounting seat; 974, rotating shaft; 975, bevel gear two; 976, bevel gear three; 977, two-way screw two; 978, bevel gear four; 98, filter plate three; 99, bellows; 991, connecting tube; 992, check valve; 993, conical collecting filter bucket; 910, motor; 10, water collecting tank; 11, pre-cooling heat exchange coil. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0026] Please refer to Figure 1-Figure 9The present invention provides a technical solution: a multi-stage heat exchange evaporative condenser, comprising a shell 1, an air intake grille 2 is arranged on the inner wall around the shell 1, an evaporative heat exchange coil 3, a spray part 4 and a precooling heat exchange coil 11 are arranged inside the shell 1, the spray part 4 is located above the evaporative heat exchange coil 3, the precooling heat exchange coil 11 is located above the spray part 4, and the precooling heat exchange coil 11 is connected with the evaporative heat exchange coil 3, an induced draft fan 5 is arranged on the top of the shell 1, a water collecting tank 10 is arranged on the inner wall of the bottom of the shell 1, and a circulating water pump 8 is arranged on the outer side of the shell 1 A conduit 2 7 is provided between the circulating water pump 8 and the spray element 4, a conduit 1 6 is fixedly installed through one side of the shell 1 close to the circulating water pump 8, a filter assembly 9 is provided between the conduit 1 6 and the circulating water pump 8, the filter assembly 9 comprises a detachable connector 91 and a barrel 92, a filter cartridge 93 is fixedly installed on the connector 91, a scraping and collecting mechanism 95 for cleaning the attachments on the inner wall of the filter cartridge 93 is provided on the inner side of the filter cartridge 93, a recoil mechanism 96 for recoil-flushing the filter cartridge 93 from the outside to the inside is provided on the outer side of the filter cartridge 93.

[0027] A water inlet 911 and a water outlet 912 are provided on both sides of the connector 91, a conduit 6 is fixedly connected to the water inlet 911, a circulating water pump 8 is communicated with the water outlet 912, a mounting boss 913 is provided inside the connector 91, the top of the filter cartridge 93 is fixedly sleeved on the mounting boss 913, the scraping and collecting mechanism 95 comprises a filter plate 951, the filter plate 951 is slidably connected to the inner wall of the filter cartridge 93, a plurality of arcuate scraping strips 953 distributed in a circular array are fixedly installed on the top of the filter plate 951, the ends of the plurality of arcuate scraping strips 953 away from the center of the filter plate 951 are all in contact with the inner wall of the filter cartridge 93, the same filter plate 952 is fixedly installed on the top of the plurality of arcuate scraping strips 953, and the side of the filter plate 952 does not contact the inner wall of the filter cartridge 93.

[0028] The filter assembly 9 also includes a connecting mechanism 97 arranged in the connecting head 91 and the cylinder 92, the connecting mechanism 97 includes two bidirectional screw rods 971 that penetrate the filter plate 1 951 and are threadedly connected to the filter plate 1 951, the two bidirectional screw rods 971 both penetrate the filter plate 2 952 and are movably connected to the filter plate 2 952, the connecting head 91 is provided with a driving mechanism 94, the driving mechanism 94 includes an annular frame 941 and a round box 946 fixedly installed on the top of the annular frame 941, the bottom of the round box 946 is open, the annular frame 941 and the round box 946 penetrate the connecting head 91 and are fixedly connected to the connecting head 91, and the rotating device in the annular frame 941 A circular plate 942 is installed, two bidirectional lead screws 971 both penetrate the circular plate 942 and are rotatably connected to the circular plate 942, two spur gears 944 are arranged above the circular plate 942, the top ends of the two bidirectional lead screws 971 are fixedly connected to the corresponding spur gears 944, an inner gear ring 943 is fixedly installed on the top inner wall of the circular box 946, the two spur gears 944 are meshed with the inner gear ring 943, the two spur gears 944 are connected to the same spur gear 2 945, a motor 910 is fixedly installed on the top of the circular box 946, the output shaft of the motor 910 rotates and penetrates the circular box 946 and is fixedly connected to the spur gear 2 945.

[0029] A filter plate three 98 is rotatably installed in the cylinder body 92, the bottom end of the filter cylinder 93 is rotatably connected to the top of the filter plate three 98, a bellows 99 is fixedly installed through the filter plate one 951, and a connecting cylinder 991 is fixedly installed at the bottom end of the bellows 99, the connecting cylinder 991 penetrates the filter plate three 98 and is fixedly connected to the filter plate three 98.

[0030] A check valve 992 is provided in the connecting cylinder 991 , in which a conical collecting filter 993 is rotatably installed. A sewage plate 921 is detachably installed through the bottom of the cylinder 92 , and the bottom end of the conical collecting filter 993 abuts against the top of the sewage plate 921 .

[0031] The recoil mechanism 96 includes an annular plate 1 961 and an annular plate 2 962 which are slidably mounted on the outside of the filter cartridge 93, and a plurality of arc-shaped scraper strips 963 distributed in a circular array are fixedly installed between the annular plate 1 961 and the annular plate 2 962, and one end of the plurality of arc-shaped scraper strips 963 close to the center of the annular plate 1 961 is slidably connected to the outside of the filter cartridge 93.

[0032] The two bidirectional screw rods 1 971 both penetrate the filter plate 3 98 and are rotatably connected to the filter plate 3 98, and the bottom ends of the two bidirectional screw rods 1 971 are fixedly installed with a bevel gear 1 972. The connecting mechanism 97 also includes two bidirectional screw rods 2 977 that penetrate the annular plate 2 962 and are threadedly connected to the annular plate 2 962. The two bidirectional screw rods 2 977 both penetrate the annular plate 1 961 and are slidably connected to the annular plate 1 961. The two bidirectional screw rods 2 977 both penetrate the filter plate 3 98 and are rotatably connected to the filter plate 3 98, and the bottom ends of the two bidirectional screw rods 2 977 are fixedly installed with a bevel gear 4 978.

[0033] The two bevel gear fours 978 are meshedly connected with bevel gear three 976, the two bevel gear ones 972 are meshedly connected with bevel gear two 975, two mounting seats 973 are fixedly installed on the bottom of the filter plate three 98, and a rotating shaft 974 is rotatably installed through the two mounting seats 973, and the two ends of the two rotating shafts 974 are fixedly connected to the corresponding bevel gear two 975 and bevel gear three 976 respectively.

[0034] In this embodiment: when in use, when the medium to be cooled flows through the evaporative heat exchange coil 3, the turned-on circulating water pump 8 draws external cooling water into the conduit 1 6, and then the cooling water is filtered by the filter assembly 9 and then flows through the circulating water pump 8 and the conduit 2 7 and is pumped into the spray part 4 and sprayed out. The cooling water sprayed from the spray part 4 is sprinkled on the evaporative heat exchange coil 3 to cool the medium to be cooled flowing through the evaporative heat exchange coil 3. At the same time, the induced draft fan 5 is turned on, and the external cold air flows into the shell 1 from the multiple air inlet grilles 2 and sweeps through the heat exchange coil 3 and the precooling After the heat exchange coil 11, it is discharged through the induced draft fan 5. The cooling water sprayed from the spray part 4 passes through the evaporative heat exchange coil 3 and then falls into the water collecting tank 10 for cooling. The cooling water in the water collecting tank 10 after cooling will flow into the conduit 1 6 together with the external cooling water, thereby reducing the waste of cooling water. When the cooling medium enters the shell 1, it first flows through the precooling heat exchange coil 11 and then enters the evaporative heat exchange coil 3 for cooling. When the cooling medium flows through the precooling heat exchange coil 11, the wet air discharged upward is initially cooled.

[0035] When the filter assembly 9 filters the cooling water, the cooling water flows into the water inlet end 911 through the conduit 16, and then passes through the filter cartridge 93 for filtration. The clean cooling water then enters the circulating water pump 8 through the water outlet end 912. After a long period of filtration, the filter cartridge 93 will be full of impurities.

[0036] When the filter cartridge 93 is to be unblocked, the motor 910 is first started. The motor 910 rotates and drives the spur gear 2 945 to rotate. The spur gear 2 945 rotates and drives the two spur gears 1 944 to rotate. With the cooperation of the inner gear ring 943, the two spur gears 1 944 will drive the two bidirectional screw rods 1 971 to rotate and revolve around the spur gear 2 945. During the revolution of the two bidirectional screw rods 1 971, the scraping and collecting mechanism 95 will be driven to rotate. During the rotation of the two bidirectional screw rods 1 971, the scraping and collecting mechanism 95 will be driven to move up and down inside the filter cartridge 93. As the scraping and collecting mechanism 95 moves upward along the axis of the filter cartridge 93 in the state of self-rotation, the impurities scraped from the inside of the filter cartridge 93 will automatically flow to the center of the filter plate 951 through the scraping of multiple arc-shaped scraping strips 953, and the impurities will then enter the bellows 99 along with the water flow and enter the conical collection filter hopper 993 through the opened check valve 992. As the scraping and collecting mechanism 95 moves downward along the axis of the filter cartridge 93 in the state of self-rotation, the check valve 992 is in a closed state, thereby ensuring that the impurities in the conical collection filter hopper 993 will not be discharged;

[0037] During the self-rotation of the two-way screw rod 1 971, the bevel gear 1 972 will be driven to rotate, and the bevel gear 1 972 will then drive the rotating shaft 974 to rotate through the meshing bevel gear 2 975, and the rotating shaft 974 will then drive the meshing bevel gear 4 978 to rotate through the bevel gear 3 976, and the bevel gear 4 978 will then drive the corresponding two-way screw rod 2 977 to rotate. In addition, during the revolution of the two two-way screw rods 1 971, the filter plate 3 98 will be driven to rotate. As the two two-way screw rods 2 977 revolve around the filter cartridge 93 in the self-rotating state, the recoil mechanism 96 will move up and down along the axis of the filter cartridge 93 and rotate, and the recoil mechanism 96 has the same rotation direction as the scraping and collecting mechanism 95. Therefore, when the scraping and collecting mechanism 95 cleans the impurities attached to the inner wall of the filter cartridge 93, the self-rotating backwashing mechanism 96 draws external cooling water to the center of the filter cartridge 93 through multiple arc-shaped scraping strips 963. During this process, the cooling water flowing to the center of the filter cartridge 93 will backwash the filter cartridge 93 from the outside to the inside, and the impurities flushed from the holes of the filter cartridge 93 will be collected by the scraping and collecting mechanism 95 and transported into the conical collecting filter bucket 993. Subsequently, you only need to regularly remove the drain plate 921 to discharge the impurities in the conical collecting filter bucket 993.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage heat exchange evaporative condenser, comprising a shell (1), characterized in that: An air intake grille (2) is provided on the inner walls around the shell (1); an evaporative heat exchange coil (3), a spray component (4) and a precooling heat exchange coil (11) are provided inside the shell (1); the spray component (4) is located above the evaporative heat exchange coil (3); the precooling heat exchange coil (11) is located above the spray component (4); and the precooling heat exchange coil (11) is connected to the evaporative heat exchange coil (3); an induced draft fan (5) is provided on the top of the shell (1); a water collecting trough (10) is provided on the inner wall of the bottom of the shell (1); a circulating water pump (8) is provided on the outer side of the shell (1); and a circulating water pump (8) is provided between the circulating water pump (8) and the spray component (4). A conduit 2 (7) is provided between the housing (1), a conduit 1 (6) is fixedly installed through one side of the housing (1) close to the circulating water pump (8), a filter assembly (9) is provided between the conduit 1 (6) and the circulating water pump (8), the filter assembly (9) comprises a detachably connected connector (91) and a barrel (92), a filter cartridge (93) is fixedly installed on the connector (91), a scraping and collecting mechanism (95) for cleaning attached matter on the inner wall of the filter cartridge (93) is provided on the inner side of the filter cartridge (93), and a recoil mechanism (96) for recoil-flushing the filter cartridge (93) from the outside to the inside is provided on the outer side of the filter cartridge (93); The filter assembly (9) further comprises a connection mechanism (97) disposed within the connector (91) and the barrel (92), the connection mechanism (97) comprising two bidirectional screw rods (971) penetrating filter plate one (951) and being threadedly connected to filter plate one (951), the two bidirectional screw rods (971) both penetrating filter plate two (952) and being movably connected to filter plate two (952), the connector (91) being provided with a drive mechanism (94), the drive mechanism (94) comprising an annular frame (941) and a round box (946) fixedly mounted on the top of the annular frame (941), the bottom of the round box (946) being open, the annular frame (941) and the round box (946) penetrating the connector (91) and being fixedly connected to the connector (91), the annular frame (941) and the round box (946) penetrating the connector (91) and being fixedly connected to the connector (91), the annular frame (941) and the round box (946) being provided with a drive mechanism (94) disposed on the connector (91) and the two bidirectional screw rods (971) both penetrating filter plate two (952) and being movably connected to filter plate two (952), 41) is rotatably mounted inside a circular plate (942), two bidirectional screw rods (971) both penetrate the circular plate (942) and are rotatably connected to the circular plate (942), two spur gears (944) are arranged above the circular plate (942), the top ends of the two bidirectional screw rods (971) are respectively fixedly connected to the corresponding spur gears (944), an inner gear ring (943) is fixedly mounted on the top inner wall of the circular box (946), the two spur gears (944) are both meshedly connected to the inner gear ring (943), the two spur gears (944) are connected to the same spur gear (945) in front, a motor (910) is fixedly mounted on the top of the circular box (946), the output shaft of the motor (910) rotatably penetrates the circular box (946) and is fixedly connected to the spur gear (945); A filter plate three (98) is rotatably mounted in the cylinder (92); the bottom end of the filter cylinder (93) is rotatably connected to the top of the filter plate three (98); a bellows (99) is fixedly mounted through the filter plate one (951); a connecting cylinder (991) is fixedly mounted at the bottom end of the bellows (99); the connecting cylinder (991) penetrates the filter plate three (98) and is fixedly connected to the filter plate three (98); A check valve (992) is provided in the connecting cylinder (991), a conical collecting filter bucket (993) is rotatably installed in the connecting cylinder (991), a sewage discharge plate (921) is detachably installed through the bottom of the cylinder body (92), and the bottom end of the conical collecting filter bucket (993) abuts against the top of the sewage discharge plate (921); The recoil mechanism (96) comprises an annular plate 1 (961) and an annular plate 2 (962) which are slidably mounted on the outside of the filter cartridge (93); a plurality of arc-shaped scraper strips 2 (963) distributed in a circular array are fixedly mounted between the annular plate 1 (961) and the annular plate 2 (962); and ends of the plurality of arc-shaped scraper strips 2 (963) close to the center of the annular plate 1 (961) are all slidably connected to the outside of the filter cartridge (93); The two bidirectional screw rods (971) both penetrate the filter plate (98) and are rotationally connected to the filter plate (98), and the bottom ends of the two bidirectional screw rods (971) are fixedly mounted with bevel gears (972). The connection mechanism (97) further comprises two bidirectional screw rods (977) that penetrate the annular plate (962) and are threadedly connected to the annular plate (962). The two bidirectional screw rods (977) both penetrate the annular plate (961) and are slidably connected to the annular plate (961). The two bidirectional screw rods (977) both penetrate the filter plate (98) and are rotationally connected to the filter plate (98), and the bottom ends of the two bidirectional screw rods (977) are fixedly mounted with bevel gears (978). The two bevel gears (978) are meshedly connected with bevel gears (976), and the two bevel gears (972) are meshedly connected with bevel gears (975). The bottom of the filter plate (98) is fixedly mounted with two mounting seats (973), and the two mounting seats (973) are rotatably mounted with rotating shafts (974). The two ends of the two rotating shafts (974) are respectively fixedly connected with the corresponding bevel gears (975) and bevel gears (976).

2. The multi-stage heat exchange evaporative condenser according to claim 1, characterized in that: The connector (91) is provided with a water inlet end (911) and a water outlet end (912) on both sides, the conduit 1 (6) is fixedly connected to the water inlet end (911), the circulating water pump (8) is connected to the water outlet end (912), a mounting boss (913) is provided inside the connector (91), the top end of the filter cartridge (93) is fixedly sleeved on the mounting boss (913), the scraping and collecting mechanism (95) comprises a filter plate 1 (951), the filter plate 1 (95 1) being slidably connected to the inner wall of the filter cartridge (93), a plurality of arc-shaped scraper strips (953) distributed in a circumferential array are fixedly mounted on the top of the filter plate (951), the ends of the plurality of arc-shaped scraper strips (953) away from the center of the filter plate (951) are all in contact with the inner wall of the filter cartridge (93), and a same filter plate (952) is fixedly mounted on the top of the plurality of arc-shaped scraper strips (953), and the side surface of the filter plate (952) does not contact the inner wall of the filter cartridge (93).

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