Quenching heat exchanger

Abstract

The utility model belongs to the technical field of ethylene cracking equipment, and discloses a quenching heat exchanger. The quenching heat exchanger comprises a barrel, an upper tube plate, a lower tube plate, an inlet seal head, an outlet seal head and a plurality of heat exchange tubes, the upper tube plate and the lower tube plate are connected to the two ends of the barrel respectively in the vertical direction and jointly define a shell pass cavity, cooling water circulates in the shell pass cavity, the inlet end socket is connected to the end, away from the barrel, of the lower tube plate, the outlet end socket is connected to the end, away from the barrel, of the upper tube plate, and the heat exchange tubes are evenly distributed in the barrel. One end of the heat exchange tube penetrates through the lower tube plate and is communicated with the inlet seal head, and the other end of the heat exchange tube penetrates through the upper tube plate and is communicated with the outlet seal head, so that high-temperature cracking gas circulates in a tube pass chamber in the heat exchange tube; the upper tube plate is provided with an exhaust mechanism, and the exhaust mechanism is used for exhausting water vapor accumulated on the upper tube plate; the lower tube plate is provided with a sewage discharging mechanism which is used for discharging dirt accumulated on the lower tube plate. The quenching heat exchanger can discharge stains and water vapor, and the reliability of the quenching heat exchanger is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of ethylene cracking equipment, and in particular to a quench heat exchanger. Background Technology

[0002] Besides the cracking furnace, another important piece of equipment in the cracking unit is the quench heat exchanger, which is a critical piece of equipment with very high process requirements in the ethylene cracking furnace. It is required to rapidly cool the high-temperature cracked gas in a very short time to prevent secondary reactions, reduce the loss of the target olefins, and recover high-grade heat energy.

[0003] Currently, quench heat exchangers typically employ a vertical shell-and-tube design, separating the tube side and shell side using upper and lower tube sheets. The tube side medium is high-temperature pyrolysis gas, while the shell side medium is cooling water. The typical workflow is as follows: high-temperature pyrolysis gas enters the heat exchange tubes through the inlet end cap; cooling water from the high-pressure steam drum enters the shell-side space formed by the boiler feedwater pipe for heat exchange; the quenched pyrolysis gas enters the outlet end cap and exits the quench heat exchanger, while the cooling water, after heat exchange, exits the quench heat exchanger as a water-vapor mixture through the water-vapor outlet pipe. During operation, due to the complex structure of the top and bottom shell side, dirt easily accumulates at the bottom of the shell side (top surface of the lower tube sheet), which is difficult to drain, potentially leading to corrosion and damage to the quench heat exchanger. Conversely, water vapor easily accumulates at the top of the shell side (bottom surface of the upper tube sheet), creating a flow dead zone, affecting the heat exchange efficiency and safety of the quench heat exchanger.

[0004] Therefore, there is an urgent need for a quenching heat exchanger to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a quench heat exchanger that can remove dirt and water vapor, thereby improving the service life, heat exchange efficiency, and safety of the quench heat exchanger.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A quench heat exchanger includes a shell, an upper tube sheet, a lower tube sheet, an inlet end cap, an outlet end cap, and a plurality of heat exchange tubes. The upper and lower tube sheets are vertically connected to both ends of the shell and together form a shell-side chamber, in which cooling water flows. The inlet end cap is connected to the end of the lower tube sheet away from the shell, and the outlet end cap is connected to the end of the upper tube sheet away from the shell. The plurality of heat exchange tubes are evenly distributed within the shell, with one end passing through the lower tube sheet and connecting to the inlet end cap, and the other end passing through the upper tube sheet and connecting to the outlet end cap, so that high-temperature pyrolysis gas flows through the tube-side chamber within the heat exchange tubes.

[0008] The upper tube sheet is equipped with an exhaust mechanism, which is used to discharge the water vapor accumulated in the upper tube sheet;

[0009] The lower tube sheet is equipped with a drainage mechanism, which is used to drain the dirt accumulated on the lower tube sheet.

[0010] Optionally, the outer periphery of the upper tube sheet is provided with a first annular protrusion on the side facing the shell-side chamber. The exhaust mechanism includes a plurality of exhaust holes, which are evenly distributed and opened horizontally on the first annular protrusion for the discharge of water vapor from the top of the shell-side chamber. The tangential surface of the top of the exhaust holes is flush with the inner wall surface of the upper tube sheet facing the shell-side chamber.

[0011] Optionally, the above-mentioned exhaust mechanism further includes:

[0012] Several rising blind holes are evenly distributed on the upper tube sheet near its own center and are opened vertically on the inner wall surface of the upper tube sheet facing the shell-side chamber.

[0013] Several exhaust channels are evenly distributed on the upper tube sheet and opened on the outer peripheral wall of the upper tube sheet. The exhaust channels are connected to the rising blind hole. Along the direction from the center of the upper tube sheet to the outer periphery of the upper tube sheet, the exhaust channels are inclined away from the shell-side chamber.

[0014] Optionally, the exhaust mechanism further includes an exhaust manifold, which is arranged around the outer peripheral wall of the upper tube sheet. The exhaust through hole and the exhaust channel are both connected to the exhaust manifold, and an exhaust pipe is connected to the exhaust manifold for discharging water vapor.

[0015] Optionally, the above-mentioned exhaust mechanism further includes:

[0016] A plurality of first exhaust connecting pipes are provided in a one-to-one correspondence with a plurality of the above-mentioned exhaust through holes, and the two ends of the above-mentioned first exhaust connecting pipes are respectively connected to the above-mentioned exhaust through holes and the above-mentioned exhaust collection pipes.

[0017] A number of second exhaust connecting pipes are provided in a one-to-one correspondence with a number of the above-mentioned exhaust channels, and the two ends of the second exhaust connecting pipes are respectively connected to the above-mentioned exhaust channels and the above-mentioned exhaust collection pipes.

[0018] Optionally, the outer periphery of the lower tube sheet is provided with a second annular protrusion on the side facing the shell-side chamber. The sewage discharge mechanism includes a plurality of sewage discharge holes, which are evenly distributed and opened horizontally on the second annular protrusion for the discharge of dirt from the bottom of the shell-side chamber. The tangential surface at the bottom of the sewage discharge holes is flush with the inner wall surface of the lower tube sheet facing the shell-side chamber.

[0019] Optionally, the aforementioned sewage discharge facilities may also include:

[0020] Several blind holes are evenly distributed on the lower tube sheet near its own center and are vertically opened on the inner wall surface of the lower tube sheet facing the shell-side chamber.

[0021] Several drainage channels are evenly distributed on the lower tube sheet and opened on the outer peripheral wall of the lower tube sheet. The drainage channels are connected to the lower blind hole. The drainage channels are inclined away from the shell-side chamber along the direction from the center of the lower tube sheet to the outer periphery of the lower tube sheet.

[0022] Optionally, the above-mentioned sewage discharge mechanism further includes a sewage collection pipe, which is arranged around the outer peripheral wall of the lower tube sheet. The sewage discharge through hole and the sewage discharge channel are both connected to the sewage collection pipe. The sewage collection pipe is provided with a sewage pipe for discharging stains.

[0023] Optionally, the aforementioned sewage discharge facilities may also include:

[0024] A plurality of first sewage connecting pipes are provided in a one-to-one correspondence with a plurality of the above-mentioned sewage through holes, and the two ends of the above-mentioned first sewage connecting pipes are respectively connected to the above-mentioned sewage through holes and the above-mentioned sewage collection pipes.

[0025] Several second sewage connection pipes are provided in a one-to-one correspondence with several of the above-mentioned sewage channels, and the two ends of the second sewage connection pipes are respectively connected to the above-mentioned sewage channels and the above-mentioned sewage collection pipes.

[0026] Optionally, the upper tube sheet is provided with a plurality of first connecting pipes, each of which is connected to a plurality of heat exchange tubes; and / or,

[0027] The lower tube sheet is provided with a number of second connecting pipes, and each of the number of the second connecting pipes is connected to a number of the heat exchange tubes.

[0028] The beneficial effects of this utility model are:

[0029] This invention provides a quench heat exchanger. By adding an exhaust mechanism to the upper tube sheet, water vapor accumulated on the inner top wall of the shell-side chamber can be discharged, preventing water vapor buildup and the formation of flow dead zones, thus improving the safety and heat exchange efficiency of the quench heat exchanger. Furthermore, by adding a drain mechanism to the lower tube sheet, dirt accumulated on the inner bottom wall of the shell-side chamber can be discharged, preventing blockage and corrosion of the shell-side inner wall due to prolonged dirt accumulation. This further enhances the protection of the quench heat exchanger, thereby extending its service life. Ultimately, this results in high reliability, excellent heat exchange efficiency, and a longer service life for the quench heat exchanger. Attached Figure Description

[0030] Figure 1 This is a half-sectional view of the quench heat exchanger provided in a specific embodiment of this utility model;

[0031] Figure 2 This is a cross-sectional view of the upper tube sheet provided in a specific embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the upper tube sheet provided in a specific embodiment of the present invention;

[0033] Figure 4 This is a cross-sectional view of the lower tube sheet provided in a specific embodiment of this utility model;

[0034] Figure 5 This is a structural schematic diagram of the lower tube sheet provided in a specific embodiment of this utility model;

[0035] Figure 6 This is a cross-sectional view of the exhaust mechanism provided in a specific embodiment of this utility model;

[0036] Figure 7 This is a structural schematic diagram of the exhaust mechanism provided in a specific embodiment of the present utility model;

[0037] Figure 8 This is a cross-sectional view of the sewage discharge mechanism provided in a specific embodiment of this utility model;

[0038] Figure 9 This is a schematic diagram of the sewage discharge mechanism provided in a specific embodiment of this utility model.

[0039] In the picture:

[0040] 10. Cylinder body;

[0041] 20. Upper tube sheet; 2001. First connecting tube; 21. First annular protrusion;

[0042] 30. Lower tube sheet; 3001. Second connecting tube; 31. Second annular protrusion;

[0043] 40. Inlet end cap; 50. Outlet end cap; 60. Heat exchanger tube; 70. Water supply connector; 80. Steam / water connector;

[0044] 90. Exhaust mechanism; 91. Exhaust through hole; 92. Rising blind hole; 93. Exhaust passage; 94. Exhaust manifold; 95. Exhaust pipe; 96. First exhaust connecting pipe; 97. Second exhaust connecting pipe;

[0045] 100. Sewage discharge mechanism; 101. Sewage discharge through hole; 102. Descent blind hole; 103. Sewage discharge channel; 104. Sewage discharge manifold; 105. Sewage discharge pipe; 106. First sewage discharge connecting pipe; 107. Second sewage discharge connecting pipe. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] The following reference Figures 1 to 9 This invention introduces the quenching heat exchanger provided by this utility model.

[0051] This embodiment provides a quench heat exchanger for rapidly cooling high-temperature pyrolysis gas. Furthermore, it can remove dirt and water vapor during use, improving the service life, heat exchange efficiency, and safety of the quench heat exchanger.

[0052] Please refer to Figure 1 Specifically, the quench heat exchanger includes a shell 10, an upper tube sheet 20, a lower tube sheet 30, an inlet end cap 40, an outlet end cap 50, and several heat exchange tubes 60. The upper tube sheet 20 and the lower tube sheet 30 are vertically connected to both ends of the shell 10 and together form a shell-side chamber, in which cooling water flows. The inlet end cap 40 is connected to the end of the lower tube sheet 30 away from the shell 10, and the outlet end cap 50 is connected to the end of the upper tube sheet 20 away from the shell 10. Each heat exchange tube 60 is evenly distributed inside the shell 10, with one end passing through the lower tube sheet 30 and connected to the inlet end cap 40, and the other end passing through the upper tube sheet 20 and connected to the outlet end cap 50, so that high-temperature pyrolysis gas flows through the tube side chamber inside the heat exchange tube 60; wherein, the upper tube sheet 20 is provided with an exhaust mechanism 90, which is used to discharge water vapor accumulated in the upper tube sheet 20; the lower tube sheet 30 is provided with a sewage discharge mechanism 100, which is used to discharge dirt accumulated in the lower tube sheet 30.

[0053] In this embodiment, the quench heat exchanger, by adding an exhaust mechanism 90 at the upper tube sheet 20, can discharge water vapor accumulated on the inner top wall of the shell-side chamber, preventing water vapor buildup and improving the safety of the quench heat exchanger while ensuring its heat exchange efficiency. Furthermore, by adding a drain mechanism 100 at the lower tube sheet 30, it can discharge dirt accumulated on the inner bottom wall of the shell-side chamber, preventing blockage and corrosion of the shell-side inner wall due to prolonged dirt accumulation, further improving the protection of the quench heat exchanger and extending its service life. This results in high reliability, better heat exchange efficiency, and a longer service life for the quench heat exchanger during use.

[0054] Please refer to Figure 2 and Figure 3 Specifically, the upper tube sheet 20 is provided with a number of first connecting pipes 2001, and the number of first connecting pipes 2001 are connected one-to-one to a number of heat exchange tubes 60; thus, the connection between the heat exchange tubes 60 and the outlet end cap 50 can be realized.

[0055] Please refer to Figure 4 and Figure 5 Specifically, the lower tube sheet 30 is provided with a number of second connecting pipes 3001, and the number of second connecting pipes 3001 are connected one-to-one to a number of heat exchange tubes 60; thus, the connection between the heat exchange tubes 60 and the inlet end cap 40 can be realized.

[0056] Optionally, multiple heat exchange tubes 60, first connecting tube 2001, and second connecting tube 3001 are provided in a one-to-one correspondence to ensure rapid cooling of a large volume of high-temperature pyrolysis gas in a single operation.

[0057] Please refer to Figures 2 to 5 More specifically, the first connecting pipe 2001 has a boss on the side facing the shell-side chamber to facilitate the connection between the first connecting pipe 2001 and the heat exchange tube 60, thereby improving the weld strength between them. Similarly, the second connecting pipe 3001 has a boss on the side facing the shell-side chamber to facilitate the connection between the second connecting pipe 3001 and the heat exchange tube 60, thereby improving the weld strength between them. Furthermore, the presence of the boss helps to increase the structural strength of the corresponding upper tube sheet 20 and lower tube sheet 30.

[0058] More specifically, the outer periphery of the upper tube sheet 20 is provided with a first annular protrusion 21 facing the shell-side chamber to facilitate the connection between the upper tube sheet 20 and the shell 10. Similarly, the outer periphery of the lower tube sheet 30 is provided with a second annular protrusion 31 facing the shell-side chamber to facilitate the connection between the lower tube sheet 30 and the shell 10.

[0059] Please return to the reference. Figure 1 Specifically, the inlet end cap 40 and the outlet end cap 50 are used to connect with the equipment through which the high-temperature pyrolysis gas flows, so as to realize the flow of the high-temperature pyrolysis gas from the bottom to the top.

[0060] More specifically, the quench heat exchanger also includes a water supply connector 70 and a steam / water connector 80. The water supply connector 70 is located on the shell 10 near the lower tube sheet 30, and the steam / water connector 80 is located on the shell 10 near the upper tube sheet 20, to allow cooling water to flow in and out. This quench heat exchanger achieves rapid cooling of the high-temperature pyrolysis gas through heat exchange between the cooling water and the gas.

[0061] For example, the shell 10 and the upper tube sheet 20 are welded together, the shell 10 and the lower tube sheet 30 are welded together, the upper tube sheet 20 and the inlet end cap 40 are welded together, the lower tube sheet 30 and the outlet end cap 50 are welded together, the shell 10 and the water supply connector 70 are welded together, and / or the shell 10 and the water vapor connector 80 are welded together. The first connecting pipe 2001 and the heat exchange tube 60, and the second connecting pipe 3001 and the heat exchange tube 60 are butt welded together by deep hole welding. This can fix the various structures of the quench heat exchanger and ensure the sealing of the shell-side chamber and the tube-side chamber.

[0062] Please refer to Figure 2 and Figure 3 In this embodiment, the outer periphery of the upper tube sheet 20 is provided with a first annular protrusion 21 facing the shell-side chamber. The exhaust mechanism 90 includes a plurality of exhaust holes 91. The plurality of exhaust holes 91 are evenly distributed and opened in the horizontal direction on the first annular protrusion 21 for the discharge of water vapor at the top of the shell-side chamber, thereby realizing the discharge of water vapor at the top of the shell-side chamber near the outer periphery.

[0063] Optionally, the top tangent surface of the vent hole 91 is flush with the inner wall surface of the upper tube sheet 20 facing the shell-side chamber, which makes it easier for the vent hole 91 to discharge water vapor from the top part of the shell-side chamber near the outer periphery.

[0064] Optionally, the above-mentioned exhaust vents 91 are provided in multiple ways, and the multiple exhaust vents 91 are evenly distributed in the circumferential direction to achieve better discharge of water vapor in the top part of the shell cavity near the outer periphery.

[0065] Furthermore, the exhaust mechanism 90 also includes several blind risers 92 and several exhaust channels 93. The blind risers 92 are evenly distributed on the upper tube sheet 20 near its center and are vertically opened on the inner wall of the upper tube sheet 20 facing the shell-side chamber; the exhaust channels 93 are evenly distributed on the upper tube sheet 20 and are opened on the outer peripheral wall of the upper tube sheet 20, and the exhaust channels 93 connect to the blind risers 92. This allows water vapor located near the center of the top of the shell-side chamber to be discharged sequentially through the blind risers 92 and the exhaust channels 93, thereby enabling the exhaust mechanism 90 to discharge water vapor from multiple locations at the top of the shell-side chamber, thus minimizing the residual water vapor at the top of the shell-side chamber.

[0066] Optionally, the exhaust passage 93 is inclined away from the shell-side chamber along the direction from the center of the upper tube sheet 20 to the outer periphery of the upper tube sheet 20. This arrangement facilitates the rise of water vapor, thereby making it easier for water vapor to be discharged through the exhaust passage 93.

[0067] Optionally, multiple rising blind holes 92 and exhaust channels 93 are provided to better exhaust water vapor from the top of the shell-side chamber near the center.

[0068] Please refer to Figure 6 and Figure 7 Furthermore, the exhaust mechanism 90 also includes an exhaust manifold 94, which is arranged around the outer peripheral wall of the upper tube sheet 20. Both the exhaust through-hole 91 and the exhaust channel 93 are connected to the exhaust manifold 94. An exhaust pipe 95 is connected to the exhaust manifold 94 for discharging water vapor. The exhaust manifold 94 collects water vapor and discharges it from the quench heat exchanger through the exhaust pipe 95, thus achieving the discharge of water vapor.

[0069] Specifically, the exhaust mechanism 90 further includes a plurality of first exhaust connecting pipes 96 and a plurality of second exhaust connecting pipes 97. The plurality of first exhaust connecting pipes 96 are correspondingly arranged with a plurality of exhaust through holes 91. The two ends of each first exhaust connecting pipe 96 are respectively connected to the exhaust through hole 91 and the exhaust manifold 94, thereby achieving communication between the exhaust through hole 91 and the exhaust manifold 94. The plurality of second exhaust connecting pipes 97 are correspondingly arranged with a plurality of exhaust channels 93. The two ends of each second exhaust connecting pipe 97 are respectively connected to the exhaust channel 93 and the exhaust manifold 94, thereby achieving communication between the exhaust channel 93 and the exhaust manifold 94.

[0070] Please refer to Figure 4 and Figure 5 In this embodiment, the lower tube sheet 30 has a second annular protrusion 31 on the outer periphery facing the shell cavity. The sewage discharge mechanism 100 includes a plurality of sewage discharge holes 101. The plurality of sewage discharge holes 101 are evenly distributed and opened in the horizontal direction on the second annular protrusion 31 for the discharge of dirt from the bottom of the shell cavity; thereby realizing the discharge of dirt from the bottom of the shell cavity near the outer periphery.

[0071] Optionally, the bottom tangent surface of the drain hole 101 is flush with the inner wall surface of the lower tube sheet 30 facing the shell-side chamber, which makes it easier for the drain hole 101 to discharge dirt from the bottom of the shell-side chamber near the outer periphery.

[0072] Optionally, the above-mentioned drain holes 101 are provided in multiple ways, and the multiple drain holes 101 are evenly distributed around the periphery to achieve better drainage of dirt in the bottom part of the shell cavity near the outer periphery.

[0073] Furthermore, the sewage discharge mechanism 100 also includes several blind holes 102 and several sewage discharge channels 103. The blind holes 102 are evenly distributed on the lower tube sheet 30 near its center and are vertically opened on the inner wall of the lower tube sheet 30 facing the shell-side chamber. The sewage discharge channels 103 are evenly distributed on the lower tube sheet 30 and are opened on the outer peripheral wall of the lower tube sheet 30, and the sewage discharge channels 103 are connected to the blind holes 102. In this way, the dirt located at the bottom near the center of the shell-side chamber can be discharged sequentially through the blind holes 102 and the sewage discharge channels 103, so that the sewage discharge mechanism 100 can discharge dirt from multiple locations at the bottom of the shell-side chamber, thereby minimizing the residue of dirt at the bottom of the shell-side chamber.

[0074] Optionally, the drain channel 103 is inclined away from the shell-side chamber along the direction from the center of the lower tube sheet 30 to the outer periphery of the lower tube sheet 30. This arrangement facilitates the flow of dirt and makes it easier for dirt to be discharged through the drain channel 103.

[0075] Optionally, multiple blind holes 102 and drainage channels 103 are provided to better drain dirt from the bottom of the shell cavity near the center.

[0076] Please refer to Figure 8 and Figure 9 Furthermore, the sewage discharge mechanism 100 also includes a sewage discharge manifold 104, which is wound around the outer peripheral wall of the lower tube sheet 30. Both the sewage discharge through-hole 101 and the sewage discharge channel 103 are connected to the sewage discharge manifold 104. The sewage discharge manifold 104 is equipped with a sewage discharge pipe 105, which is used to discharge dirt. The sewage discharge manifold 104 collects dirt and discharges it from the quench heat exchanger through the sewage discharge pipe 105, thereby achieving the discharge of dirt.

[0077] Specifically, the sewage discharge mechanism 100 also includes a plurality of first sewage discharge connecting pipes 106 and a plurality of second sewage discharge connecting pipes 107. The plurality of first sewage discharge connecting pipes 106 are respectively arranged in a one-to-one correspondence with a plurality of sewage discharge through holes 101. The two ends of the first sewage discharge connecting pipes 106 are respectively connected to the sewage discharge through holes 101 and the sewage collection pipe 104 to realize the connection between the sewage discharge through holes 101 and the sewage collection pipe 104. The plurality of second sewage discharge connecting pipes 107 are respectively arranged in a one-to-one correspondence with a plurality of sewage discharge channels 103 to realize the connection between the sewage discharge channels 103 and the sewage collection pipe 104.

[0078] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A quench heat exchanger, characterized in that, The device includes a shell-side body (10), an upper tube sheet (20), a lower tube sheet (30), an inlet end cap (40), an outlet end cap (50), and several heat exchange tubes (60). The upper tube sheet (20) and the lower tube sheet (30) are vertically connected to both ends of the shell-side body (10) and together form a shell-side chamber. Cooling water flows through the shell-side chamber. The inlet end cap (40) is connected to the lower tube sheet (30) away from the shell-side body (10). At one end, the outlet end cap (50) is connected to the end of the upper tube sheet (20) away from the cylinder (10). A plurality of heat exchange tubes (60) are evenly distributed within the cylinder (10), with one end passing through the lower tube sheet (30) and connecting to the inlet end cap (40), and the other end passing through the upper tube sheet (20) and connecting to the outlet end cap (50), so that high-temperature pyrolysis gas flows through the tube-side chamber within the heat exchange tubes (60); wherein, The upper tube sheet (20) is provided with an exhaust mechanism (90), which is used to discharge the water vapor accumulated in the upper tube sheet (20); The lower tube sheet (30) is provided with a sewage discharge mechanism (100) for discharging the dirt accumulated in the lower tube sheet (30).

2. The quench heat exchanger according to claim 1, characterized in that, The outer periphery of the upper tube sheet (20) facing the shell-side chamber is provided with a first annular protrusion (21). The exhaust mechanism (90) includes a plurality of exhaust holes (91). The plurality of exhaust holes (91) are evenly distributed and opened in the first annular protrusion (21) in the horizontal direction for the exhaust of water vapor at the top of the shell-side chamber. The tangent surface of the top of the exhaust hole (91) is flush with the inner wall surface of the upper tube sheet (20) facing the shell-side chamber.

3. The quench heat exchanger according to claim 2, characterized in that, The exhaust mechanism (90) also includes: Several rising blind holes (92) are evenly distributed on the upper tube sheet (20) near its own center and are opened vertically on the inner wall surface of the upper tube sheet (20) facing the shell-side chamber; Several exhaust channels (93) are evenly distributed on the upper tube sheet (20) and opened on the outer peripheral wall of the upper tube sheet (20). The exhaust channels (93) are connected to the rising blind hole (92). Along the direction from the center of the upper tube sheet (20) to the outer periphery of the upper tube sheet (20), the exhaust channels (93) are inclined away from the shell-side chamber.

4. The quench heat exchanger according to claim 3, characterized in that, The exhaust mechanism (90) further includes an exhaust manifold (94), which is arranged around the outer peripheral wall of the upper tube plate (20). The exhaust through hole (91) and the exhaust channel (93) are both connected to the exhaust manifold (94). An exhaust pipe (95) is connected to the exhaust manifold (94) and is used to discharge water vapor.

5. The quench heat exchanger according to claim 4, characterized in that, The exhaust mechanism (90) also includes: A plurality of first exhaust connecting pipes (96) are provided in a one-to-one correspondence with a plurality of exhaust through holes (91), and the two ends of the first exhaust connecting pipes (96) are respectively connected to the exhaust through holes (91) and the exhaust collection pipe (94); A plurality of second exhaust connecting pipes (97) are provided in a one-to-one correspondence with a plurality of exhaust channels (93), and the two ends of the second exhaust connecting pipes (97) are respectively connected to the exhaust channels (93) and the exhaust manifold (94).

6. The quench heat exchanger according to claim 1, characterized in that, The lower tube sheet (30) has a second annular protrusion (31) on the outer periphery facing the shell-side chamber. The sewage discharge mechanism (100) includes a plurality of sewage discharge holes (101). The plurality of sewage discharge holes (101) are evenly distributed and opened in the second annular protrusion (31) in the horizontal direction for the discharge of dirt at the bottom of the shell-side chamber. The tangential surface at the bottom of the sewage discharge hole (101) is flush with the inner wall surface of the lower tube sheet (30) facing the shell-side chamber.

7. The quench heat exchanger according to claim 6, characterized in that, The sewage discharge mechanism (100) also includes: Several descending blind holes (102) are evenly distributed on the lower tube sheet (30) near its own center and are opened vertically on the inner wall surface of the lower tube sheet (30) facing the shell-side chamber; Several drainage channels (103) are evenly distributed on the lower tube sheet (30) and opened on the outer peripheral wall of the lower tube sheet (30). The drainage channels (103) are connected to the descending blind hole (102). Along the direction from the center of the lower tube sheet (30) to the outer periphery of the lower tube sheet (30), the drainage channels (103) are inclined away from the shell-side chamber.

8. The quench heat exchanger according to claim 7, characterized in that, The sewage discharge mechanism (100) further includes a sewage collection pipe (104), which is arranged around the outer peripheral wall of the lower tube plate (30). The sewage discharge through hole (101) and the sewage discharge channel (103) are both connected to the sewage collection pipe (104). The sewage collection pipe (104) is provided with a sewage pipe (105) for discharging dirt.

9. The quench heat exchanger according to claim 8, characterized in that, The sewage discharge mechanism (100) also includes: A plurality of first sewage connecting pipes (106) are provided in a one-to-one correspondence with a plurality of sewage through holes (101), and the two ends of the first sewage connecting pipes (106) are respectively connected to the sewage through holes (101) and the sewage collection pipe (104); A plurality of second sewage connecting pipes (107) are provided in a one-to-one correspondence with a plurality of sewage channels (103), and the two ends of the second sewage connecting pipes (107) are respectively connected to the sewage channels (103) and the sewage collection pipes (104).

10. The quench heat exchanger according to any one of claims 1-9, characterized in that, The upper tube sheet (20) is provided with a plurality of first connecting pipes (2001), each of which is connected to one of the plurality of heat exchange tubes (60); and / or, The lower tube sheet (30) is provided with a plurality of second connecting pipes (3001), and the plurality of second connecting pipes (3001) are connected one-to-one to the plurality of heat exchange tubes (60).

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