A quench heat exchanger

Abstract

The application discloses a quenching heat exchanger, relates to the quenching heat exchange technical field, and comprises an inlet connecting pipe, a cracked gas inlet header, a cracked gas outlet header, and is further provided with two symmetrically arranged water feeding inlet pipes, two water feeding pipe headers, two steam and saturated water outlet headers, two steam and saturated water outlet pipes and a plurality of inner pipes for passing in high-temperature medium and a plurality of outer pipes for passing in low-temperature medium, each outer pipe is coaxially sleeved outside the corresponding inner pipe, and the inlet connecting forge piece and the outlet connecting forge piece are welded on each outer pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quenching heat exchanger, in particular to a quenching heat exchanger. BACKGROUND

[0002] Cracking furnace is a key equipment of ethylene plant. Cracking raw materials are cooled rapidly in quenching heat exchanger after high-temperature cracking in cracking furnace tubes. At present, linear quenching heat exchanger is mostly used in cracking furnace.

[0003] The traditional linear quenching heat exchanger is composed of upper flat circular tube, upper flat circular tube connecting piece, upper flat circular tube connecting pipe, lower flat circular tube, lower flat circular tube connecting piece, lower flat circular tube connecting pipe, cracking gas header, inlet connecting piece, outer tube and inner tube. The inner tube is concentrically arranged in the outer tube, the medium in the inner tube is cracking gas at about 800 DEG C, and the medium in the outer tube is water vapor mixture (saturated steam) at about 350 DEG C. Each inner tube is connected with an outlet pipe of cracking furnace through an inlet connecting piece, and each outer tube is connected with upper and lower headers through upper and lower header connecting pieces and header connecting pipes.

[0004] The existing quenching heat exchanger still has the following problems:

[0005] The quenching heat exchanger operates in harsh conditions, in a high temperature difference and high pressure difference environment, and the heat exchange tube bears axial deformation pressure. The linear quenching heat exchanger of traditional design has complex structure, the upper and lower connecting pieces cannot absorb thermal expansion, and the inner tube needs to be pre-stretched to reduce thermal expansion difference, which is difficult to manufacture. Cracking gas is a high-temperature, high-pressure and high-speed fluid medium, which may contain coke, dust and other impurities, and water hammer effect may also occur during medium flow, causing equipment damage. SUMMARY

[0006] The present application provides a quenching heat exchanger to solve the problems in the above background.

[0007] The application provides a quenching heat exchanger, which comprises an inlet connecting pipe, a cracking gas inlet header, a cracking gas outlet header, two water inlet pipes, two water pipe headers, two steam and saturated water outlet headers, two steam and saturated water outlet pipes, a plurality of inner pipes for passing high-temperature medium and a plurality of outer pipes for passing low-temperature medium, wherein each outer pipe is coaxially sleeved outside the corresponding inner pipe, each outer pipe is welded with an inlet connecting forging and an outlet connecting forging, one end of the inner pipe is connected with the cracking gas inlet header, the other end of the inner pipe is connected with the cracking gas outlet header, each water inlet pipe is connected with the corresponding water pipe header, each water pipe header is connected with the corresponding inlet connecting forging, each steam and saturated water outlet header is connected with the corresponding outlet connecting forging, and each steam and saturated water outlet pipe is connected with the corresponding steam and saturated water outlet header.

[0008] Further, the plurality of inner pipes and outer pipes are arranged in two rows.

[0009] Further, the two water pipe headers are symmetrically arranged on the two sides of the outer pipes, and the two steam and saturated water outlet headers are symmetrically arranged on the two sides of the outer pipes.

[0010] Further, the water pipe headers and the steam and saturated water outlet headers on the same side of each outer pipe are symmetrically arranged about the middle part of the outer pipe.

[0011] Further, each inlet connecting forging comprises an outer pipe and a center pipe, the center pipe is connected with the inner pipe, the outer pipe is connected with the cracking gas inlet header, one end of the inlet connecting forging is provided with a bottom groove, and a heat-resistant block is arranged in the bottom groove.

[0012] Further, each water pipe header and steam and saturated water outlet header is provided with a blowdown opening.

[0013] Further, one end of the cracking gas outlet header is provided with a plurality of decoking interfaces, and each decoking interface is connected with the corresponding inner pipe.

[0014] Further, the anti-blocking assembly comprises a filter screen and a fixing seat, the filter screen is fixedly connected to one end inside the inlet connecting pipe, the fixing seat is fixedly installed at the inner center of the inlet connecting pipe through a fixing rod, a rotating shaft is rotationally connected to one side of the fixing seat which faces the filter screen, a plurality of fan blades are fixedly installed on the end of the rotating shaft which is away from the filter screen, a plurality of scrapers are fixedly installed on the end of the rotating shaft which is close to the filter screen, and one side of each scraper is attached to one side of the filter screen.

[0015] Further, the adjusting assembly comprises an adjusting pipe and a shockproof component, one end of the adjusting pipe is connected with the water inlet pipe, an upper half circular plate is fixedly installed on the upper side wall of the adjusting pipe, a lower half circular plate is fixedly installed on the lower side wall of the adjusting pipe, a transverse plate is fixedly and jointly connected between the upper half circular plate and the lower half circular plate, a plurality of through holes are linearly arranged on the transverse plate, an adjusting cylinder is fixedly installed on the outer wall of the adjusting pipe, an electric push rod is fixedly installed on the inner top wall of the adjusting cylinder, the output end of the electric push rod is downwardly arranged and fixedly connected with a first piston, the first piston is sealingly and slidingly connected in the adjusting cylinder, and the lower end of the first piston penetrates through the adjusting pipe and is fixedly installed with an adjusting plate, the bottom of the adjusting plate is fixedly connected with adjusting rods corresponding to the plurality of through holes, and the lengths of the plurality of adjusting rods located on the same side gradually increase from the side close to the water inlet pipe to the side far away from the water inlet pipe.

[0016] Further, the shockproof component comprises two shockproof boxes which are symmetrically arranged with respect to the adjusting pipe, a second piston is sealingly and slidingly connected in each shockproof box, and the lower end of each second piston penetrates through the adjusting pipe and is fixedly installed with a connecting rod, two semicircular arc plates are also symmetrically and fixedly installed on the inner side wall of the adjusting pipe, a baffle is rotatably connected on each semicircular arc plate, a moving block is also rotatably connected on one side of each baffle, and one side of each moving block is rotatably connected with a corresponding connecting rod, the adjusting cylinder is filled with hydraulic oil in the space below the first piston, and each shockproof box is also filled with hydraulic oil in the space below the second piston, a hose containing hydraulic oil is communicated between the adjusting cylinder and one of the shockproof boxes, and a hose containing hydraulic oil is also communicated between the two shockproof boxes.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] The present application adopts two groups of outer pipes and inner pipes side by side, which is different from the conventional single arrangement, reduces the equipment volume, and enhances the heat exchange efficiency.

[0019] The present application optimizes and integrates the traditional concentric column arrangement of heat exchange pipes into outer pipes and inner pipes, greatly reduces the manufacturing cost, and at the same time increases the volume ratio of low temperature medium and high temperature medium, and improves the heat exchange efficiency.

[0020] When the high temperature medium is introduced, the high temperature medium will first pass through the filter screen in the inlet connecting pipe, block the impurities such as coke and dust that may be contained in the high temperature medium, and prevent the impurities from flowing into the inner pipe to cause damage to the equipment and affect the heat exchange efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the accompanying drawings needed to be used in the specific embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0022] Figure 1 It is a schematic view of the overall structure of the present application.

[0023] Figure 2 It is a sectional view of the inlet connecting forging.

[0024] Figure 3 It is a sectional view of the outlet connecting forging.

[0025] Figure 4 It is a schematic view of the partial structure of the anti-blocking assembly.

[0026] Figure 5 It is a schematic view of the partial structure of the adjusting assembly.

[0027] In the drawings:

[0028] 1, inlet connecting pipe; 2, cracking gas inlet header; 3, outer pipe; 4, inlet connecting forging; 5, feed water inlet pipe; 6, feed water pipe header; 7, inner pipe; 8, outlet connecting forging; 9, steam and saturated water outlet header; 10, steam and saturated water outlet pipe; 11, cracking gas outlet header; 12, coke removal interface; 13, anti-blocking assembly; 14, filter screen; 15, fixing seat; 16, rotating shaft; 17, fan blade; 18, scraper; 19, adjusting assembly; 20, anti-impact component; 21, adjusting pipe; 22, upper semicircular plate; 23, lower semicircular plate; 24, transverse plate; 25, adjusting cylinder; 26, electric push rod; 27, first piston; 28, adjusting plate; 29, adjusting rod; 30, anti-impact box; 31, second piston; 32, connecting rod; 33, semicircular arc plate; 34, baffle; 35, moving block; 36, hose. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0030] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0031] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] With reference to the drawings accompanying the specification Figures 1 to 5 The embodiment provides a quenching heat exchanger, which comprises an inlet connecting pipe 1, a cracking gas inlet header 2, a cracking gas outlet header 11, the inlet connecting pipe 1 is connected with the cracking gas inlet header 2, further comprises two water inlet pipes 5, two water pipe headers 6, two steam and saturated water outlet headers 9, two steam and saturated water outlet pipes 10 which are symmetrically arranged, and a plurality of inner pipes 7 for passing high-temperature medium and a plurality of outer pipes 3 for passing low-temperature medium, each outer pipe 3 is coaxially sleeved outside the corresponding inner pipe 7, the inlet connecting forging 4 and the outlet connecting forging 8 are welded on each outer pipe 3, one end of the inner pipe 7 is connected with the cracking gas inlet header 2, the other end of the inner pipe 7 is connected with the cracking gas outlet header 11, each water inlet pipe 5 is connected with the corresponding water pipe header 6, each water pipe header 6 is connected with the corresponding inlet connecting forging 4, each steam and saturated water outlet header 9 is connected with the corresponding outlet connecting forging 8, and each steam and saturated water outlet pipe 10 is connected with the corresponding steam and saturated water outlet header 9, the inlet connecting pipe 1 is provided with an anti-blocking assembly 13, and one end of each water inlet pipe 5 is provided with an adjusting assembly 19. The inner pipe 7 and the outer pipe 3 are arranged in a concentric structure, a gap is arranged between the inner pipe 7 and the outer pipe 3, the low-temperature medium is facilitated to enter, the high-temperature medium is separated from the low-temperature medium through the inner pipe 7, and heat exchange is facilitated.

[0035] Specifically, the inner tubes 7 and the outer tubes 3 are arranged in two rows.

[0036] Specifically, the two feedwater pipe headers 6 are symmetrically arranged on the two sides of the outer tubes 3, and the two steam and saturated water outlet headers 9 are symmetrically arranged on the two sides of the outer tubes 3.

[0037] Specifically, the feedwater pipe headers 6 and the steam and saturated water outlet headers 9 on the same side of each outer tube 3 are symmetrically arranged about the middle part of the outer tube 3.

[0038] Specifically, each inlet connecting forging 4 comprises an outer tube and a center tube, the center tube is connected with the inner tube 7, and the outer tube is connected with the cracking gas inlet header 2, one end of the inlet connecting forging 4 is provided with a bottom groove, and a heat-resistant block is arranged in the bottom groove. By arranging the heat-resistant block, deformation of the connecting part of the inlet connecting forging 4 when the high-temperature medium flows in can be effectively prevented, the service life of each connecting part is prolonged, and the production cost is reduced.

[0039] Specifically, each feedwater pipe header 6 and each steam and saturated water outlet header 9 is provided with a blowdown port.

[0040] Specifically, one end of the cracking gas outlet header 11 is provided with a plurality of decoking interfaces 12, and each decoking interface 12 is connected with a corresponding inner tube 7.

[0041] Specifically, the anti-blocking assembly 13 comprises a filter screen 14 and a fixed seat 15, the filter screen 14 is fixedly connected to one end inside the inlet connecting pipe 1, the fixed seat 15 is fixedly installed at the inner center of the inlet connecting pipe 1 through a fixed rod, a rotating shaft 16 is rotatably connected to one side of the fixed seat 15 which faces the filter screen 14, a plurality of fan blades 17 are fixedly installed on one end of the rotating shaft 16 which is away from the filter screen 14, a plurality of scrapers 18 are fixedly installed on one end of the rotating shaft 16 which is close to the filter screen 14, and one side of each scraper 18 is attached to one side of the filter screen 14. When the high-temperature medium flows in, the high-temperature medium will first pass through the filter screen 14 inside the inlet connecting pipe 1, blocking the impurities such as coke and dust that may be contained in the high-temperature medium, preventing them from flowing into the inner tube 7 and causing damage to the equipment and affecting the heat exchange efficiency, at the same time, the high-temperature medium will drive the fan blades 17 to rotate, and the fan blades 17 will drive the scrapers 18 to rotate through the rotating shaft 16, and the impurities on the filter screen 14 will be scraped off, preventing them from blocking the filter holes on the filter screen 14.

[0042] Specifically, the adjusting assembly 19 comprises the adjusting pipe 21 and the anti-collision component 20, one end of the adjusting pipe 21 is connected with the water inlet pipe 5, the upper side wall of the adjusting pipe 21 is fixedly installed with the upper semicircular plate 22, the lower side wall of the adjusting pipe 21 is fixedly installed with the lower semicircular plate 23, the upper semicircular plate 22 and the lower semicircular plate 23 are jointly and fixedly connected with the horizontal plate 24, the horizontal plate 24 is linearly arrayed with a plurality of through holes, the outer wall of the adjusting pipe 21 is fixedly installed with the adjusting cylinder 25, the inner top wall of the adjusting cylinder 25 is fixedly installed with the electric push rod 26, the output end of the electric push rod 26 is downwardly arranged and fixedly connected with the first piston 27, the first piston 27 is sealingly and slidingly connected in the adjusting cylinder 25, and the lower end of the first piston 27 penetrates through the adjusting pipe 21 and is fixedly installed with the adjusting plate 28, the bottom of the adjusting plate 28 is fixedly connected with the adjusting rods 29 corresponding to the plurality of through holes, and the lengths of the adjusting rods 29 located on the same side gradually increase from the side close to the water inlet pipe 5 to the side far away from the water inlet pipe 5.

[0043] Specifically, the anti-collision component 20 comprises two anti-collision boxes 30 symmetrically arranged about the adjusting pipe 21, each anti-collision box 30 is sealingly and slidingly connected with the second piston 31, and the lower end of each second piston 31 penetrates through the adjusting pipe 21 and is fixedly installed with the connecting rod 32, the inner side wall of the adjusting pipe 21 is also symmetrically fixedly installed with the two semicircular arc plates 33, each semicircular arc plate 33 is rotatably connected with the baffle 34, one side of each baffle 34 is also rotatably connected with the moving block 35, one side of each moving block 35 is rotatably connected with the corresponding connecting rod 32, the space below the first piston 27 in the adjusting cylinder 25 and the space below the second piston 31 in each anti-collision box 30 are filled with hydraulic oil, the adjusting cylinder 25 and one of the anti-collision boxes 30 are communicated with the hose 36 containing hydraulic oil, and the two anti-collision boxes 30 are also communicated with the hose 36 containing hydraulic oil.

[0044] The high-temperature medium enters the cracking gas inlet header 2 through the inlet connecting pipe 1; the low-temperature medium first passes through the adjusting pipe 21 in the adjusting assembly 19, then enters the feedwater pipe header 6 through the feedwater inlet pipe 5, is distributed into the gap between the inner pipe 7 and the outer pipe 3 through the inlet connecting forging 4, then moves towards the outlet connecting forging 8, and then enters the steam and saturated water outlet header 9, and finally is discharged from the steam and saturated water outlet pipe 10; the high-temperature medium and the low-temperature medium are heat-exchanged through the inner pipe 7, and after the heat-exchange, the temperature of the high-temperature medium is 350-450 DEG C, and the temperature of the low-temperature medium is 300-350 DEG C; the high-temperature medium after the heat-exchange flows into the cracking gas outlet header 11 through the inner pipe 7, and then flows out of the cracking gas outlet header 11, and the heat-exchange is completed; when the device is stopped for maintenance, the inner pipe 7 is cleaned by connecting the external decoking water pipe through the decoking interface 12 to remove the impurities or dirt in the inner pipe 7; then water is fed from the steam and saturated water outlet header 9 to clean the gap between the outer pipe 3 and the inner pipe 7, remove the impurities, and the sewage is discharged from the blowdown port on the feedwater pipe header 6, so that the equipment is protected, the service life of the equipment can be effectively prolonged, the production cost is reduced, and the efficiency of the quenching and heat-exchange is effectively improved.

[0045] In the embodiment, every two groups of the outer pipes 3 and the inner pipes 7 are arranged side by side, which is different from the conventional single arrangement, so that the equipment volume is reduced and the heat-exchange efficiency is improved. In the embodiment, the traditional concentric column heat-exchange pipes are optimized and integrated into the outer pipes 3 and the inner pipes 7, so that the manufacturing cost is greatly reduced, the volume ratio of the low-temperature medium to the high-temperature medium is increased, and the heat-exchange efficiency is improved.

[0046] When the high-temperature medium is introduced, the high-temperature medium first passes through the filter screen 14 in the inlet connecting pipe 1 to block the impurities such as coke and dust possibly contained in the high-temperature medium, so as to prevent the impurities from flowing into the inner pipe 7 to damage the equipment and affect the heat-exchange efficiency. Meanwhile, the high-temperature medium drives the fan blade 17 to rotate, and the fan blade 17 drives the scraper 18 to rotate through the rotating shaft 16 to scrape off the impurities on the filter screen 14 to prevent the filter screen 14 from being blocked. In addition, the fixed seat 15 and the fixed rod thereon are designed with chamfers, so as not to hinder the normal flow of the high-temperature medium. The filter screen 14, the fixed seat 15, the rotating shaft 16, the fan blade 17 and the scraper 18 in the anti-blocking assembly 13 are made of high-temperature resistant materials and will not be deformed.

[0047] When the low-temperature medium is introduced, the low-temperature medium is adjusted in flow rate by the adjusting assembly 19 according to the temperature of the high-temperature medium before being introduced into the feed water inlet pipe 5. The first piston 27 is moved by the electric push rod 26 in extension and contraction, and the adjusting plate 28 is moved by the first piston 27, so as to control the cooperation of the plurality of adjusting rods 29 with the plurality of through holes, and the flow rate of the low-temperature medium in the adjusting pipe 21 is accurately controlled, so as to accurately adjust the flow rate of the low-temperature medium according to the temperature of the high-temperature medium, improve the heat exchange efficiency, and reduce the loss of materials. After the low-temperature medium passes through the upper semicircular plate 22, the lower semicircular plate 23 and the through holes exposed on the horizontal plate 24 in turn, the low-temperature medium continues to flow towards the feed water inlet pipe 5. At the same time, the movement of the first piston 27 causes the hydraulic oil to flow between the adjusting cylinder 25 and the two anti-collision boxes 30. The second piston 31 in the two anti-collision boxes 30 moves into the adjusting pipe 21 due to the action of the hydraulic oil, and the connecting rod 32 moves into the adjusting pipe 21, and the baffle 34 is rotated on the semicircular arc plate 33 by the rotating connection of the connecting rod 32 and the moving block 35, so as to appropriately block the low-temperature medium in the adjusting pipe 21, slow down the flow rate of the low-temperature medium, avoid the water hammer effect, and reduce the damage to the equipment.

[0048] It is worth mentioning that when the first movable piston is moved upward by the electric push rod 26, the number of the through holes on the horizontal plate 24 that are opened gradually increases, so the flow rate of the low-temperature medium also gradually increases. In order to prevent the water hammer effect caused by the excessive flow rate of the low-temperature medium, the first piston 27 sucks the hydraulic oil from the anti-collision boxes 30 in the anti-collision component 20 into the adjusting cylinder 25 when the first piston 27 moves upward. At this time, the second piston 31 descends, the connecting rod 32 moves downward, and the baffle 34 is rotated into the adjusting pipe 21 by the moving block 35, so as to block the flow of the low-temperature medium, slow down the flow rate of the low-temperature medium, avoid the water hammer effect, and reduce the damage to the equipment pipelines in the present application. The hose 36 between the two anti-collision boxes 30 can ensure that the pressure between the two anti-collision boxes 30 is stable, and the rotating angles of the two baffles 34 are consistent.

[0049] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents. The modification or replacement does not change the essence of the corresponding technical solution from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A quench heat exchanger comprising an inlet connecting pipe (1), a cracked gas inlet header (2), a cracked gas outlet header (11), the inlet connecting pipe (1) being connected to the cracked gas inlet header (2), characterized in that, Two water inlet pipes (5), two water inlet headers (6), two steam and saturated water outlet headers (9), two steam and saturated water outlet pipes (10) and a plurality of inner pipes (7) for passing high-temperature medium and a plurality of outer pipes (3) for passing low-temperature medium are symmetrically arranged, each outer pipe (3) is coaxially sleeved outside the corresponding inner pipe (7), the inlet connecting forging (4) and the outlet connecting forging (8) are welded on each outer pipe (3), one end of the inner pipe (7) is connected with the cracking gas inlet header (2), the other end of the inner pipe (7) is connected with the cracking gas outlet header (11), each water inlet pipe (5) is connected with the corresponding water inlet header (6), each water inlet header (6) is connected with the corresponding inlet connecting forging (4), each steam and saturated water outlet header (9) is connected with the corresponding outlet connecting forging (8), each steam and saturated water outlet pipe (10) is connected with the corresponding steam and saturated water outlet header (9), the anti-blocking assembly (13) is arranged in the inlet connecting pipe (1), and one end of each water inlet pipe (5) is provided with the adjusting assembly (19). The adjusting assembly (19) comprises an adjusting pipe (21) and a anti-collision component (20), one end of the adjusting pipe (21) is connected with the water inlet pipe (5), the upper side wall of the adjusting pipe (21) is fixedly installed with an upper semicircular plate (22), the lower side wall of the adjusting pipe (21) is fixedly installed with a lower semicircular plate (23), the upper semicircular plate (22) and the lower semicircular plate (23) are fixedly connected with a transverse plate (24) in common, a plurality of through holes are linearly arranged on the transverse plate (24), the outer wall of the adjusting pipe (21) is fixedly installed with an adjusting cylinder (25), the inner top wall of the adjusting cylinder (25) is fixedly installed with an electric push rod (26), the output end of the electric push rod (26) is downwardly arranged and fixedly connected with a first piston (27), the first piston (27) is sealingly and slidingly connected in the adjusting cylinder (25), and the lower end of the first piston (27) penetrates through the adjusting pipe (21) and is fixedly installed with an adjusting plate (28), the bottom of the adjusting plate (28) is fixedly connected with adjusting rods (29) corresponding to the plurality of through holes in one-to-one correspondence, and the lengths of the plurality of adjusting rods (29) on the same side gradually increase from the side close to the water inlet pipe (5) to the side far away from the water inlet pipe (5).

2. The quench heat exchanger of claim 1, wherein, The plurality of inner pipes (7) and outer pipes (3) are arranged in two rows.

3. The quench heat exchanger of claim 2, wherein, The two water inlet headers (6) are symmetrically arranged on the two sides of the outer pipes (3), and the two steam and saturated water outlet headers (9) are symmetrically arranged on the two sides of the outer pipes (3).

4. The quench heat exchanger of claim 3, wherein, The water inlet headers (6) and the steam and saturated water outlet headers (9) on the same side of each outer pipe (3) are symmetrically arranged about the middle part of the outer pipe (3).

5. The quench heat exchanger of claim 1, wherein, Each of the inlet connecting forgings (4) comprises an outer tube and a center tube, the center tube is connected with the inner tube (7), the outer tube is connected with the cracking gas inlet header (2), one end of the inlet connecting forging (4) is provided with a bottom groove, and a heat-resistant block is arranged in the bottom groove.

6. The quench heat exchanger of claim 1, wherein, Each of the feed water pipe header (6) and the steam and saturated water outlet header (9) is provided with a blowdown port.

7. The quench heat exchanger of claim 1, wherein, The cracking gas outlet header (11) is provided with a plurality of decoking interfaces (12) at one end, and each of the decoking interfaces (12) is connected with a corresponding inner tube (7).

8. The quench heat exchanger of claim 1, wherein, The anti-blocking assembly (13) comprises a filter screen (14) and a fixed seat (15), the filter screen (14) is fixedly connected to one end inside the inlet connecting pipe (1), the fixed seat (15) is fixedly installed at the center inside the inlet connecting pipe (1) through a fixed rod, a rotating shaft (16) is rotatably connected to one side of the fixed seat (15) towards the filter screen (14), a plurality of fan blades (17) are fixedly installed at one end of the rotating shaft (16) away from the filter screen (14), a plurality of scrapers (18) are fixedly installed at one end of the rotating shaft (16) close to the filter screen (14), and one side of each of the scrapers (18) is attached to one side of the filter screen (14).

9. The quench heat exchanger of claim 1, wherein, The anti-collision component (20) comprises two anti-collision boxes (30) symmetrically arranged about the adjusting pipe (21), each of the anti-collision boxes (30) is sealingly and slidably connected with a second piston (31), and the lower end of each of the second pistons (31) penetrates through the adjusting pipe (21) and is fixedly installed with a connecting rod (32), the inner side wall of the adjusting pipe (21) is also symmetrically fixedly installed with two semicircular arc plates (33), each of the semicircular arc plates (33) is rotatably connected with a baffle (34), one side of each of the baffles (34) is also rotatably connected with a moving block (35), one side of each of the moving blocks (35) is rotatably connected with a corresponding connecting rod (32), the adjusting cylinder (25) is located below the first piston (27), and the space below each of the anti-collision boxes (30) is filled with hydraulic oil, a hose (36) containing hydraulic oil is communicated between the adjusting cylinder (25) and one of the anti-collision boxes (30), and a hose (36) containing hydraulic oil is also communicated between the two anti-collision boxes (30).

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