Double-spiral jacket plug-in heat exchanger for ascending pipe of coke oven

Abstract

The utility model relates to a double-spiral jacket plug-in heat exchanger of a coke oven riser, and belongs to the technical field of coke oven raw gas waste heat recovery. According to the technical scheme, an upper sealing ring (3) is welded to the upper ends of an outer barrel (1) and an inner barrel (2), annular steel pipes (4) are welded to the lower ends of the outer barrel (1) and the inner barrel (2) to form a closed space, and a spiral coil (7) is movably arranged in the closed space; a water inlet sleeve (10), a water outlet sleeve I (13) and a water outlet sleeve II (15) are respectively arranged outside the water inlet pipe (9), the water outlet pipe I (12) and the water outlet pipe II (14), and gaps I among the water inlet sleeve (10), the water outlet sleeve I (13) and the water outlet sleeve II (15) are exhaust pressure relief channels; and the outer cylinder is provided with a telescopic labyrinth seal along the length direction of the outer cylinder. The pressure relief valve can effectively relieve pressure and provide leakage indication; the outer barrel body is provided with a telescopic labyrinth seal, so that thermal stress caused by different deformation of the inner barrel body and the outer barrel body is eliminated; the sealed annular steel pipe is arranged at the lower end of the heat exchanger, the bottom of the heat exchanger can be effectively cooled, and the risk that weld joints are heated and damaged is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coke oven ascending pipe double helix jacket insertion type heat exchanger belongs to coke oven raw coal gas waste heat recovery technical field. BACKGROUND

[0002] The coke oven carbonization chamber outlet raw coal gas temperature is about 650-800 DEG C, and the heat carried away by the raw coal gas accounts for about 36% of the total heat consumption of coking. The raw coal gas enters the bridge pipe after the ascending pipe, and enters the gas collecting pipe after being cooled by the sprayed ammonia water in the bridge pipe section. At this time, the raw coal gas temperature is reduced to 80-85 DEG C. However, the use of circulating ammonia water cooling greatly wastes the heat energy of this part of high-temperature gas, and also brings a large amount of cooling water consumption to the subsequent process. If the raw coal gas waste heat is recovered through the ascending pipe heat exchanger, saturated steam (or superheated steam) is produced and used in the grid, which can recover the investment within two years and reduce the energy consumption per ton of coke by about 10 kg of standard coal, which is an important means to achieve the double carbon goal.

[0003] The existing insertion type spiral pipe heat exchanger can recover the coke oven raw coal gas waste heat, but there are some technical problems: 1) The spiral pipe insertion type heat exchanger is directly placed in the ascending pipe for heat extraction, and the tar precipitated after the raw coal gas is cooled accumulates between the spiral pipe gaps. The more tar accumulates on the spiral pipe insertion type heat exchanger, the lower the heat extraction efficiency. Excessive accumulation of the tar makes the raw coal gas passage smaller, and even causes the ascending pipe to be blocked, causing safety accidents; 2) The existing spiral pipe insertion type heat exchanger usually uses two hanging pipes for water inlet and outlet, which cannot effectively and stably suspend the lower spiral pipe, and the heat exchanger is prone to distortion and other phenomena after being deformed by heat.

[0004] Although the existing sleeve insertion type heat exchanger can avoid the fouling problem between the spiral pipe gaps of the insertion type spiral pipe heat exchanger, it still has some technical problems: 1) The sleeve insertion type heat exchanger adopts a multi-group spiral pipe parallel form, and the multi-group spiral pipes are distributed by a water distribution package. During use, uneven distribution of circulating water in each group of spiral pipes often occurs, and even dry burning and pipe explosion phenomena occur; 2) Once the spiral pipe in the sleeve leaks, an indication port is needed to discharge steam to provide a leakage indication. If the steam cannot be discharged in time, the heat exchanger will be deformed or even explode; 3) Due to the temperature difference between the inner and outer sleeve walls of the sleeve insertion type heat exchanger, the inner and outer sleeves are deformed differently by heat. Under the periodic temperature fluctuation of the coke oven, the rigidly fixed inner and outer sleeves have thermal stress, which causes the heat exchanger to deform and break; 4) Since the heat exchanger is close to the carbonization chamber at the lower part, the heat exchanger temperature is the highest, and the weld joint at the connection between the inner and outer sleeves is prone to cracking, causing leakage of the heat exchanger heat transfer medium.

[0005] Chinese patent 202222592405.1, titled "A coke oven riser pipe upper water supply plug-in type sleeve lining enamel heat exchange device", adopts an upper water supply method, i.e. the water supply and water return distribution boxes are placed at the upper end of the spiral coil, the temperature at the upper part of the heat exchanger is lower, and the shorter water supply pipe will not twist due to thermal deformation; the spiral pipe elbow at the bottom is arranged in a pipeline symmetrical in the circumferential direction, which can effectively reduce the unbalanced thermal deformation and achieve uniform deformation; the spiral coil is in a floating state and can deform freely after being heated, thereby eliminating thermal stress; by wrapping the inner and outer cylinders outside the spiral pipe and sintering metal ceramic enamel on the inner and outer cylinder walls, the smooth and low adhesion cylinder wall can effectively prevent tar from sticking; an indicating branch pipe and a bursting plate are arranged at the upper part of the heat exchanger, the indicating branch pipe is connected to a closed space composed of the inner and outer cylinders, and after the spiral coil leaks, the gas-liquid mixture can be discharged along the indicating branch pipe and burst the bursting plate, thereby playing an indicating role. Although it can reduce unbalanced thermal deformation, eliminate thermal stress, and play an indicating role after the spiral coil leaks, there is still a risk of uneven water distribution and heat damage to the weld at the bottom of the heat exchanger. Utility model content

[0006] The utility model aims at providing a coke oven riser pipe double spiral jacket plug-in heat exchanger, which cancels the original water distribution box structure and reduces the risk of uneven water distribution; the outer cylinder body is provided with a labyrinth seal that can stretch and contract along the length direction of the cylinder body, thereby eliminating the thermal stress caused by the deformation difference between the inner and outer cylinder bodies; the lower end of the heat exchanger is provided with a blocked annular steel pipe, which can effectively cool the bottom of the heat exchanger and reduce the risk of heat damage to the weld, thereby solving the above problems in the background art.

[0007] The technical scheme of the utility model is:

[0008] The utility model provides a coke oven riser double helix jacketed insert type heat exchanger, containing outer cylinder and inner cylinder, the concentric arrangement of outer cylinder and inner cylinder, and the upper end of outer cylinder and inner cylinder is welded with upper sealing ring, and the lower end is welded with annular steel pipe, forms the closed space, the helical coil is arranged in the closed space and is filled with heat conducting medium around, the helical coil contains spiral pipe one and spiral pipe two, spiral pipe one and spiral pipe two are alternately coiled on the inner cylinder, the bottom of spiral pipe one and spiral pipe two is connected with the both sides of water pipe plug of annular steel pipe respectively, and forms a passageway, the top of spiral pipe one is connected with water inlet pipe and water supply flange in sequence, the top of spiral pipe two is installed three ways, and is divided into two roads, one road is connected with water outlet pipe one and water outlet flange in sequence, and the other road is connected with water outlet pipe two, and water outlet pipe two is connected with water outlet pipe one through connecting pipe, the outer part of water inlet pipe, water outlet pipe one and water outlet pipe two is provided with water inlet sleeve pipe, water outlet sleeve pipe one and water outlet sleeve pipe two respectively, and the gap of water inlet pipe and water inlet sleeve pipe, water outlet pipe one and water outlet sleeve pipe one and water outlet pipe two and water outlet sleeve pipe two is exhaust pressure relief channel, the retractable labyrinth seal of outer cylinder is arranged along the length direction of outer cylinder, when the coke oven riser is passed through the outer cylinder and the inner cylinder, the heat is transmitted to the heat conducting medium through the outer cylinder and the inner cylinder, and is finally transmitted to the circulating water in the helical coil, the helical coil is in the state of floating in the closed space, can freely deform after being heated, and releases the thermal stress.

[0009] The outer cylinder is composed of an upper outer cylinder, a lower outer cylinder, a sealing ring one, a sealing ring two and a sealing ring three, a gap two is arranged between the upper outer cylinder and the lower outer cylinder, the sealing ring one is arranged outside the gap two, the lower part of the sealing ring two is welded on the lower outer cylinder, and the upper part is not welded; the upper part and the lower part of the sealing ring two are welded on the upper outer cylinder, and a gap three is arranged between the sealing ring one and the sealing ring two; the upper part of the sealing ring three is welded with the sealing ring two, and the lower part is not welded; the sealing ring three covers the gap three; the sealing ring one, the sealing ring two and the sealing ring three form a retractable labyrinth seal, so that the upper outer cylinder and the lower outer cylinder can slide and stretch out and retract, and the external coke oven gas can be prevented from entering the heat exchanger.

[0010] The annular steel pipe comprises an annular pipe, the annular pipe is arranged to be disconnected, the water pipe plug is arranged at the disconnected position of the annular pipe, and the two ends of the water pipe plug are arranged inside the two ends of the annular pipe respectively; the two ends outside the annular pipe are welded with the water pipe plug, so as to seal and connect the annular pipe.

[0011] The water inlet sleeve pipe, the water outlet sleeve pipe one and the water outlet sleeve pipe two are all 90-degree elbow pipes, the water inlet sleeve pipe, the water outlet sleeve pipe one and the water outlet sleeve pipe two are connected through the reinforcing support, and the upper parts are fixed on the water seal disc support, and the lower parts are welded with the inner cylinder and the outer cylinder, so as to form an integral whole.

[0012] The lower part of the exhaust pressure relief channel is communicated with the closed space, and the upper part is communicated with the outside through the water seal disc support, which can provide indication when the spiral pipe leaks and discharge steam pressure relief.

[0013] The connecting pipe is arranged outside the water seal disc support.

[0014] The cylinder wall of the outer cylinder body and the inner cylinder body is sintered with metal ceramic glaze, so that the cylinder wall is smooth and has low adhesion, and tar bonding can be effectively prevented.

[0015] The heat-conducting medium is magnesium oxide powder or heat-conducting cement, and has good fluidity and heat-conducting performance; the heat-conducting medium automatically fills the gap caused by thermal deformation, so that the heat transfer efficiency is ensured.

[0016] The reinforcing support is a triangular support.

[0017] The width of the gap two and the gap three is 30-50mm.

[0018] The utility model discloses insert to the inside of the rising pipe, and the water seal disc support is installed between the rising pipe flange and the rising pipe cover flange, passes through the bolt fixation. High temperature flue gas passes through the inner and outer cylinder of heat exchanger, and carries out heat exchange with the circulating water in spiral pipe, and the circulating water forms steam water mixture after absorbing heat, and finally enters the system steam pocket. The spiral pipe is in the state of swimming in the closed space, can deform freely after being heated, and releases thermal stress.

[0019] The utility model discloses the beneficial effect is: cancel the original water distribution package structure, reduced the risk of uneven water distribution, spiral pipe water distribution is reasonable, once leak, can effectively relieve pressure, provide leak indication, the outer cylinder body passes through setting the labyrinths seal that can retract along the length direction of cylinder body, eliminates the thermal stress caused by the deformation difference of inner cylinder body and outer cylinder body, the lower end of heat exchanger is provided with the plugging annular steel pipe, can effectively cool the bottom of heat exchanger, reduces the risk of heat damage of weld. DRAWINGS

[0020] Figure 1 It is the structure schematic diagram of the utility model;

[0021] Figure 2 It is the spiral pipe structure schematic diagram of the utility model;

[0022] Figure 3 It is the annular steel pipe sectional view of the utility model;

[0023] Figure 4 It is the labyrinth seal sectional view of the utility model;

[0024] In the figure: outer cylinder 1, upper outer cylinder 101, lower outer cylinder 102, sealing ring one 103, sealing ring two 104, sealing ring three 105, inner cylinder 2, upper sealing ring 3, annular steel pipe 4, annular pipe 401, water pipe plug 402, reinforcing support 5, water seal disc support 6, spiral pipe 7, spiral pipe one 701, spiral pipe two 702, tee joint 703, water supply flange 8, water inlet pipe 9, water inlet sleeve pipe 10, water outlet flange 11, water outlet pipe one 12, water outlet sleeve pipe one 13, water outlet pipe two 14, water outlet sleeve pipe two 15, connecting pipe 16, heat conducting medium 17. DETAILED DESCRIPTION

[0025] The utility model is further described by examples in connection with the drawings.

[0026] A coke oven riser double spiral jacket plug-in heat exchanger, comprising an outer cylinder 1 and an inner cylinder 2, the outer cylinder 1 and the inner cylinder 2 are arranged concentrically, the upper end of the outer cylinder 1 and the inner cylinder 2 is welded with an upper sealing ring 3, and the lower end is welded with an annular steel pipe 4, forming a closed space; the spiral pipe 7 is arranged in the closed space and surrounded by the heat conducting medium 17; the spiral pipe 7 comprises spiral pipe one 701 and spiral pipe two 702, which are alternately wound on the inner cylinder 2; the bottom of the spiral pipe one 701 and the spiral pipe two 702 are connected with the water pipe plug 402 on both sides of the annular steel pipe 4 respectively, and a passage is formed; the top of the spiral pipe one 701 is connected with the water inlet pipe 9 and the water supply flange 8 in turn, the top of the spiral pipe two 702 is installed with a tee joint 703 and is divided into two ways, one is connected with the water outlet pipe one 12 and the water outlet flange 11 in turn, and the other is connected with the water outlet pipe two 14, which is connected with the water outlet pipe one 12 through the connecting pipe 16; the water inlet pipe 9, the water outlet pipe one 12 and the water outlet pipe two 14 are respectively provided with the water inlet sleeve pipe 10, the water outlet sleeve pipe one 13 and the water outlet sleeve pipe two 15, and the gap between the water inlet pipe 9 and the water inlet sleeve pipe 10, the water outlet pipe one 12 and the water outlet sleeve pipe one 13 and the water outlet pipe two 14 and the water outlet sleeve pipe two 15 is an exhaust pressure relief channel; the outer cylinder 1 is provided with a retractable labyrinth seal along the length direction of the outer cylinder. When the coke oven riser is filled with the raw coal gas, the heat is transferred to the heat conducting medium through the outer cylinder and the inner cylinder, and finally to the circulating water in the spiral pipe; the spiral pipe is in a floating state in the closed space, which can deform freely after being heated and release the thermal stress.

[0027] The outer cylinder 1 is composed of an upper outer cylinder 101, a lower outer cylinder 102, a sealing ring one 103, a sealing ring two 104 and a sealing ring three 105, a gap two is arranged between the upper outer cylinder 101 and the lower outer cylinder 102, the sealing ring one 103 is sleeved outside the gap two, the lower part of the sealing ring one 103 is welded on the lower outer cylinder 102, and the upper part is not welded; the upper part and the lower part of the sealing ring two 104 are welded on the upper outer cylinder 101, and a gap three is arranged between the sealing ring two 104 and the sealing ring one 103, the upper part of the sealing ring three 105 is welded with the sealing ring two 104, and the lower part is not welded, the sealing ring three 105 covers the gap three, and the sealing ring one 103, the sealing ring two 104 and the sealing ring three 105 form a telescopic labyrinth seal, so that the upper outer cylinder and the lower outer cylinder can slide and stretch out and retract, and external tar gas can be prevented from entering the heat exchanger.

[0028] The annular steel pipe 4 comprises an annular pipe 401, the annular pipe 401 is arranged to be disconnected, a water pipe plug 402 is arranged at the disconnected position of the annular pipe 401, and the two ends of the water pipe plug 402 are arranged inside the two ends of the annular pipe 401 respectively, and the outer parts of the two ends of the annular pipe 401 are welded with the water pipe plug 402, so as to form sealing and connection of the annular pipe.

[0029] The water inlet sleeve pipe 10, the water outlet sleeve pipe one 13 and the water outlet sleeve pipe two 15 are all 90-degree elbow pipes, the water inlet sleeve pipe 10, the water outlet sleeve pipe one 13 and the water outlet sleeve pipe two 15 are connected through the reinforcing support 5, and the upper parts are fixed on the water seal disc support 6, and the lower parts are welded with the inner cylinder 2 and the outer cylinder 1, so as to form a whole body.

[0030] The exhaust pressure relief channel is connected with the closed space at the lower part, and is connected with the outside at the upper part through the water seal disc support 6, so as to provide indication when the spiral pipe leaks and discharge steam pressure relief.

[0031] The connecting pipe 16 is arranged outside the water seal disc support 6.

[0032] The cylinder wall of the outer cylinder 1 and the inner cylinder 2 is sintered with metal ceramic glaze, so that the cylinder wall is smooth and has low adhesion, and tar bonding can be effectively prevented.

[0033] The heat conducting medium 17 is magnesium oxide powder or heat conducting cement, and has good fluidity and heat conducting performance; the heat conducting medium 17 automatically fills the gap caused by thermal deformation, so as to ensure heat transfer efficiency.

[0034] The reinforcing support 5 is a triangular support.

[0035] The width of the gap two and the gap three is 30-50mm.

[0036] In this embodiment, a coke oven riser double helix jacket plug-in heat exchanger is inserted into the inside of the riser, and the water seal disc support 6 is installed between the riser flange and the riser cover flange and fixed by bolts. The high-temperature flue gas flows through the inner and outer cylinders of the heat exchanger and exchanges heat with the circulating water in the spiral pipe, and the circulating water absorbs heat to form a steam-water mixture, which finally enters the system steam drum.

[0037] The spiral pipe is uniformly wound on the outer wall of the inner cylinder 2 and tightly adheres to the inner cylinder 2, and the outer cylinder 1 is wrapped outside the spiral pipe 7; the outer cylinder 1 and the inner cylinder 2 are concentrically arranged, and the upper end of the outer cylinder 1 and the inner cylinder 2 is welded with the upper sealing ring 3, and the lower end is welded with the annular steel pipe 4, forming a closed space; the spiral pipe is placed in the closed space and filled with heat-conducting medium around. When the raw gas in the riser flows through the outer cylinder and the inner cylinder, the heat is transferred to the heat-conducting medium through the outer cylinder and the inner cylinder, and finally to the circulating water in the spiral pipe. The spiral pipe is in a floating state in the closed space and can deform freely after being heated to release thermal stress.

[0038] The spiral pipe 7 is composed of spiral pipe one 701 and spiral pipe two 702, which are alternately wound on the inner cylinder 2, and the spiral pipe one 701 and the spiral pipe two 702 meet at both sides of the water pipe plug 402 of the annular steel pipe 4 at the bottom, forming a passage. The upper part of the spiral pipe one 701 is connected with the water inlet pipe 9 and the water supply flange 8 in turn, and the water inlet sleeve pipe 10 is arranged outside the water inlet pipe 9; the upper part of the spiral pipe two 702 is provided with a three-way pipe 703, which is divided into two paths, one of which is connected with the water outlet pipe one 12 and the water outlet flange 11 in turn, and the water outlet sleeve pipe one 13 is arranged outside the water outlet pipe one 12; the other is connected with the water outlet pipe two 14 and the connecting pipe 16 in turn, and the water outlet sleeve pipe two 15 is arranged outside the water outlet pipe two 14, and the connecting pipe 16 is gathered with the water outlet pipe one 12 outside the water seal disc support 6.

[0039] The water inlet pipe 9, the water outlet pipe one 12 and the water outlet pipe two 14 are respectively sleeved with the water inlet sleeve pipe 10, the water outlet sleeve pipe one 13 and the water outlet sleeve pipe two 15, and the inner diameters of the water inlet sleeve pipe 10, the water outlet sleeve pipe one 13 and the water outlet sleeve pipe two 15 are respectively greater than the inner diameters of the water inlet pipe 9, the water outlet pipe one 12 and the water outlet pipe two 14, and the gaps between the water inlet pipe 9 and the water inlet sleeve pipe 10, the water outlet pipe one 12 and the water outlet sleeve pipe one 13, and the water outlet pipe two 14 and the water outlet sleeve pipe two 15 are all exhaust pressure relief channels; the lower part of the exhaust pressure relief channel is connected to the closed space between the inner cylinder and the outer cylinder, and the upper part leads to the outside from the water seal disc support, which can provide indication when the spiral pipe leaks and discharge steam pressure relief.

[0040] The water inlet sleeve 10, the water outlet sleeve one 13 and the water outlet sleeve two 15 are all 90-degree elbow pipes, are connected through the reinforcing support 5, are fixed on the water seal disc support 6, are welded with the inner cylinder body 2 and the outer cylinder body 1, and form an integral whole.

[0041] The annular steel pipe 4 is composed of an annular pipe 401 and a water pipe plug 402 inserted into the annular pipe, the annular pipe 401 is provided to be disconnected, the water pipe plug 402 is arranged at the disconnected position of the annular pipe 401, and the outside is welded to block and connect the annular pipe.

[0042] The outer cylinder body 1 is composed of an upper outer cylinder 101, a lower outer cylinder 102, a sealing ring one 103, a sealing ring two 104 and a sealing ring three 105, a gap two is arranged between the upper outer cylinder 101 and the lower outer cylinder 102, the distance of the gap two is about 30-50 mm, heat deformation is offset, the lower part of the sealing ring one 103 is welded on the lower outer cylinder 102, the upper part is not welded, and the whole is sleeved above the gap two, the upper part and the lower part of the sealing ring two 104 are welded on the upper outer cylinder 101, and a gap three of 30-50 mm is left between the sealing ring one 103, the lower part of the sealing ring three 105 is not welded, and covers the gap three, the sealing ring one 103, the sealing ring two 104 and the sealing ring three 105 form a telescopic labyrinth seal, the upper outer cylinder and the lower outer cylinder can slide and stretch, and the outside can be prevented from entering the heat exchanger.

[0043] The utility model discloses a heat exchanger, which comprises an inner cylinder body, an outer cylinder body, a spiral coil pipe, a water inlet sleeve, a water outlet sleeve one and a water outlet sleeve two, and a reinforcing support.

[0044] The inner cylinder and the outer cylinder are smooth in surface, the surface adhesion is small after coking, and the heat exchanger is easy to clean; the hanging pipe can effectively and stably hang the heat exchanger body; the water distribution of the spiral pipe of the heat exchanger is reasonable, once the spiral pipe leaks, the heat exchanger can effectively release pressure and provide leakage indication; the outer cylinder is provided with a labyrinth seal which can be telescoped along the length direction of the cylinder, so that the thermal stress caused by the deformation difference of the inner cylinder and the outer cylinder is eliminated; the lower end of the heat exchanger is provided with a blocked annular steel pipe, which can effectively cool the bottom of the heat exchanger and reduce the risk of thermal damage of the weld.

Claims

1. A coke oven uptake double-spiral jacketed insert heat exchanger, characterized in that: The application relates to a heat exchanger, which comprises an outer cylinder (1) and an inner cylinder (2), the outer cylinder (1) and the inner cylinder (2) are arranged concentrically, an upper sealing ring (3) is welded on the upper end of the outer cylinder (1) and the inner cylinder (2), a lower annular steel pipe (4) is welded on the lower end of the outer cylinder (1) and the inner cylinder (2), and a closed space is formed; a spiral coil (7) is arranged in the closed space and is filled with a heat-conducting medium (17) around; the spiral coil (7) comprises a spiral pipe one (701) and a spiral pipe two (702), the spiral pipe one (701) and the spiral pipe two (702) are alternately wound on the inner cylinder (2); the bottom of the spiral pipe one (701) and the bottom of the spiral pipe two (702) are connected with the water pipe plug (402) on the two sides of the annular steel pipe (4) respectively, and a passage is formed; the top of the spiral pipe one (701) is connected with a water inlet pipe (9) and a water supply flange (8) in sequence, the top of the spiral pipe two (702) is provided with a tee joint (703) and is divided into two paths, one path is connected with a water outlet pipe one (12) and a water outlet flange (11) in sequence, and the other path is connected with a water outlet pipe two (14), the water outlet pipe two (14) is connected with the water outlet pipe one (12) through a connecting pipe (16); the outer part of the water inlet pipe (9), the water outlet pipe one (12) and the water outlet pipe two (14) is provided with a water inlet sleeve pipe (10), a water outlet sleeve pipe one (13) and a water outlet sleeve pipe two (15) respectively, and the gaps between the water inlet pipe (9) and the water inlet sleeve pipe (10), the water outlet pipe one (12) and the water outlet sleeve pipe one (13) and the water outlet pipe two (14) and the water outlet sleeve pipe two (15) are all exhaust pressure relief channels; the outer cylinder (1) is provided with a telescopic labyrinth seal along the length direction of the outer cylinder.

2. The double-spiral-jacket-inserted heat exchanger of the upcomer of a coke oven according to claim 1, characterized in that: The outer cylinder (1) is composed of an upper outer cylinder (101), a lower outer cylinder (102), a sealing ring one (103), a sealing ring two (104) and a sealing ring three (105), a gap two is arranged between the upper outer cylinder (101) and the lower outer cylinder (102), the sealing ring one (103) is sleeved outside the gap two, the lower part of the sealing ring one (103) is welded on the lower outer cylinder (102), and the upper part is not welded; the upper part and the lower part of the sealing ring two (104) are both welded on the upper outer cylinder (101), and a gap three is arranged between the sealing ring two (104) and the sealing ring one (103), the upper part of the sealing ring three (105) is welded with the sealing ring two (104), and the lower part is not welded, the sealing ring three (105) covers the gap three, and the sealing ring one (103), the sealing ring two (104) and the sealing ring three (105) form a telescopic labyrinth seal.

3. The double-spiral-jacket-inserted heat exchanger of the upcomer of coke oven according to claim 1 or 2, characterized in that: The annular steel pipe (4) comprises an annular pipe (401), the annular pipe (401) is arranged in a broken mode, the water pipe plug (402) is arranged at the broken position of the annular pipe (401), and the two ends of the water pipe plug (402) are arranged inside the two ends of the annular pipe (401) respectively, and the outer parts of the two ends of the annular pipe (401) are welded with the water pipe plug (402).

4. The double-spiral-jacket-inserted heat exchanger of the upcomer of coke oven according to claim 1 or 2, characterized in that: The water inlet sleeve (10), the water outlet sleeve one (13) and the water outlet sleeve two (15) are all 90-degree elbow pipes, the water inlet sleeve (10), the water outlet sleeve one (13) and the water outlet sleeve two (15) are connected through the reinforcing support (5), and the upper parts are fixed on the water seal disc support (6), and the lower parts are welded with the inner cylinder (2) and the outer cylinder (1) to form an integral whole.

5. The double-spiral-jacketed-insert heat exchanger of the upcomer of a coke oven according to claim 4, characterized in that: The lower part of the exhaust pressure relief channel is communicated with the closed space, and the upper part is communicated with the outside through the water seal disc support (6).

6. The double-spiral-jacketed-insert heat exchanger of the upcomer of a coke oven according to claim 5, characterized in that: The connecting pipe (16) is arranged outside the water seal disc support (6).

7. The double-spiral-jacketed-insert heat exchanger of the upcomer of a coke oven according to claim 1 or 2, characterized in that: The cylinder wall of the outer cylinder (1) and the inner cylinder (2) is sintered metal ceramic glaze.

8. The double-spiral-jacketed-insert heat exchanger of the upcomer of a coke oven according to claim 1 or 2, characterized in that: The heat-conducting medium (17) is magnesium oxide powder or heat-conducting cement.

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