A novel quench heat exchanger
By employing a header and connector design in the quench heat exchanger to integrate the cracked gas and heat exchange system, and combining the support of the bracket and heat-resistant blocks, the problems of complex structure and high cost of traditional quench heat exchangers are solved, achieving efficient heat exchange and extended equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANGONG CHUANGGUO (SHANGHAI) ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional quench heat exchangers have complex heat exchange tube structures, and the pyrolysis gas and heat exchange components are not well integrated, resulting in high operating costs.
The system employs a pyrolysis gas inlet manifold, a water supply manifold, a discharge manifold, and a pyrolysis gas outlet manifold, arranged at intervals. A flow cavity is provided between the inner and outer pipes for heat exchange, and the various parts are connected together by connectors. A bracket and a connecting frame are provided on the outer periphery of the outer pipe for support, the inner pipe is cleaned, and heat-resistant blocks prevent the connectors from deforming.
It achieves high heat exchange efficiency with good overall performance, reduces production costs, and extends equipment life.
Smart Images
Figure CN224580775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of quench heat exchanger technology, and specifically to a novel quench heat exchanger. Background Technology
[0002] The cracking furnace is a key piece of equipment in an ethylene plant. After the feedstock undergoes high-temperature cracking in the furnace tubes, it enters the quench heat exchanger for rapid cooling.
[0003] Traditional quench heat exchangers consist of multiple single-layer pipes, with spiral heat exchange tubes or multiple linearly arranged annular heat exchange tubes installed outside the pipes for heat exchange. The heat exchange tube structure is complex, generally requiring a separate circulation system. The parts for transporting pyrolysis gas and the heat exchange parts cannot be well integrated, resulting in high practical operating costs. Therefore, a new technical solution is urgently needed to address at least one of these technical problems. Summary of the Invention
[0004] The purpose of this invention is to provide a novel rapid cooling heat exchanger with good overall integrity and high heat exchange efficiency.
[0005] To achieve the above-mentioned technical objectives and requirements, the technical solution adopted by this utility model is as follows: a novel rapid cooling heat exchanger, characterized in that it includes a cracked gas inlet manifold, at least one feedwater manifold, at least one discharge manifold, and a cracked gas outlet manifold arranged at intervals. At least one first connector is connected to the outer periphery of the cracked gas inlet manifold, at least one second connector is connected to the outer periphery of the feedwater manifold, and at least one third connector is connected to the outer periphery of the discharge manifold. The first connector is connected to the second connector, and an outer pipe is connected between the second connector and the third connector. An inner pipe is coaxially arranged inside the outer pipe. One end of the inner pipe is connected to the second connector, and the other end passes through the second connector and connects to the cracked gas outlet manifold. A flow cavity is provided between the outer pipe and the inner pipe. The first connector is connected to both the inner pipe and the cracked gas inlet manifold, the second connector and the third connector are connected to the flow cavity, and the inner pipe is connected to the cracked gas outlet manifold.
[0006] As a preferred technical solution, at least one coke removal pipe is connected to the outer periphery of the pyrolysis gas outlet box.
[0007] As a preferred technical solution, at least one bracket is fixedly provided on the outer periphery of the outer tube.
[0008] As a preferred technical solution, at least one connecting bracket is fixedly provided on the outer periphery of the outer tube.
[0009] As a preferred technical solution, the bracket includes a first arc plate fixedly disposed on the outer periphery of the outer tube, a first support plate fixedly disposed radially on the outer periphery of the first arc plate, and a second support plate vertically fixedly disposed on the end of the first support plate opposite to the first arc plate.
[0010] As a preferred technical solution, the connecting frame includes a second arc plate fixedly disposed on the outer periphery of the outer tube, a reinforcing plate fixedly disposed radially on the outer periphery of the second arc plate, and connecting plates respectively vertically fixed on both sides of the reinforcing plate, wherein the connecting plate is provided with a connecting hole through it.
[0011] As a preferred technical solution, at least one support pipe rack is fixedly installed on the outer periphery of the pyrolysis gas outlet header.
[0012] As a preferred technical solution, the end of the coke removal pipe opposite to the pyrolysis gas outlet header is detachably equipped with a pipe cover.
[0013] As a preferred technical solution, the first connector has a receiving groove at one end facing the second connector, and a heat-resistant block is provided in the receiving groove.
[0014] The beneficial effects of this utility model are: 1) The cracked gas in the cracked gas inlet header enters the inner tube, and the water vapor or cooling water in the feed water header enters the flow cavity between the outer tube and the inner tube to exchange heat with the cracked gas in the inner tube. The first connector connects the cracked gas and the second connector together. The inner tube, outer tube and feed water header are respectively connected to the second connector. The inner tube, outer tube and discharge header are respectively connected to the third connector. The inner tube is connected to the cracked gas outlet box. It has good integrity and high heat exchange efficiency. 2) Pass cleaning fluid into the descaling pipe to clean the inner tube and remove impurities or dirt from the inner tube. 3) The bracket supports the outer tube, and the connecting bracket connects and fixes the outer tube; 4) The heat-resistant block effectively prevents the deformation of the first connector and extends the service life of the first connector. Attached Figure Description
[0015] Figure 1 This is a three-dimensional simplified diagram of a heat exchanger provided in one embodiment of the present invention; Figure 2 This is a top view of a heat exchanger provided in one embodiment of the present invention; Figure 3 yes Figure 2 AA section view; Figure 4 yes Figure 3 BB section view; Figure 5 yes Figure 3CC section view.
[0016] exist Figures 1-5 In the diagram, 1. Cracking gas inlet header; 101. Cracking gas inlet; 2. Water supply header; 201. Water supply inlet; 3. Discharge header; 301. Discharge outlet; 4. Cracking gas outlet header; 5. First connecting piece; 6. Second connecting piece; 601. First external connection port; 602. Internal connection port; 603. First side connection port; 604. First installation gap; 7. Third connecting piece; 701. Second external connection port; 702. Second side connection port; 703, second installation gap; 8, outer pipe; 9, inner pipe; 10, flow cavity; 11, descaling pipe; 12, pipe cover; 13, bracket; 1301, first arc plate; 1302, first support plate; 1303, second support plate; 14, connecting frame; 1401, second arc plate; 1402, reinforcing plate; 1403, connecting plate; 14031, connecting hole; 15, supporting pipe rack; 16, heat-resistant block. Detailed Implementation
[0017] The present invention will now be further described with reference to the accompanying drawings.
[0018] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "head," "tail," "top," "bottom," "left," "right," "front," "rear," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0019] Please see Figures 1-5This utility model provides a novel quench heat exchanger, comprising a cracked gas inlet manifold 1, at least one feedwater manifold 2, at least one discharge manifold 3, and a cracked gas outlet manifold 4, arranged at intervals. At least one first connector 5 is connected to the outer periphery of the cracked gas inlet manifold 1. At least one second connector 6 is connected to the outer periphery of the feedwater manifold 2. At least one third connector 7 is connected to the outer periphery of the discharge manifold 3. The first connector 5 is connected to the second connector 6. An outer pipe 8 is connected between the second connector 6 and the third connector 7. An inner pipe 9 is coaxially arranged inside the outer pipe 8. One end of the inner pipe 9 is connected to the second connector 6, and the other end passes through the second connector 6 and connects to the cracked gas outlet manifold 4. A flow cavity 10 is provided between the outer pipe 8 and the inner pipe 9. The first connecting piece 5 is connected to the inner pipe 9 and the cracked gas inlet manifold 1 respectively. The second connecting piece 6 and the third connecting piece 7 are connected to the flow cavity 10 respectively. The inner pipe 9 is connected to the cracked gas outlet manifold 4. The cracked gas in the cracked gas inlet manifold 1 enters the inner pipe 9. The water vapor or cooling water in the water supply manifold 2 enters the flow cavity 10 between the outer pipe 8 and the inner pipe 9 to exchange heat with the cracked gas in the inner pipe 9. The cracked gas after heat exchange is discharged from the cracked gas outlet manifold 4, and the water vapor after heat exchange is discharged from the discharge manifold 3. The first connecting piece 5 connects the cracked gas and the second connecting piece 6 together. The inner pipe 9, the outer pipe 8 and the water supply manifold 2 are connected to the second connecting piece 6 respectively. The inner pipe 9, the outer pipe 8 and the discharge manifold 3 are connected to the third connecting piece 7 respectively. The inner pipe 9 is connected to the cracked gas outlet manifold. It has good integrity and high heat exchange efficiency.
[0020] Specifically, such as Figures 1-5 As shown, there are two water supply manifolds 2, which are spaced apart vertically and aligned. There are also two discharge manifolds 3, which are spaced apart vertically and aligned. One to eight outer pipes 8 are installed between the upper water supply manifold 2 and the upper discharge manifold 3. One to eight outer pipes 8 are installed between the lower water supply manifold 2 and the lower discharge manifold 3. The number of inner pipes 9 corresponds to the number of outer pipes 8. The number of first connectors 5, second connectors 6 and third connectors 7 corresponds to the number of outer pipes 8. The cracked gas inlet manifold 1 is provided with a cracked gas inlet 101. The water supply manifold 2 is provided with a water supply inlet 201. The discharge manifold 3 is provided with a discharge outlet 301.
[0021] When the quench heat exchanger is shut down for maintenance, water is introduced into the discharge manifold 3 to clean the flow cavity 10 between the outer pipe 8 and the inner pipe 9, removing impurities. Wastewater is discharged from the feed water manifold 2. To better discharge wastewater, a drain outlet (not marked) can be installed at the bottom of the feed water manifold 2 to protect the quench heat exchanger, effectively extend its service life, and reduce production costs.
[0022] like Figures 1-5 As shown, at least one coke removal pipe 11 is connected to the outer periphery of the pyrolysis gas outlet box. Specifically, there are multiple coke removal pipes 11, which are equidistantly arranged. The end of the coke removal pipe 11 facing away from the pyrolysis gas outlet header 4 is detachably equipped with a pipe cover 12. After removing the pipe cover 12, cleaning fluid is introduced into the coke removal pipe 11 to clean the inner pipe 9, removing impurities or dirt in the inner pipe 9. Wastewater is discharged from the pyrolysis gas inlet header 1. After cleaning, the pipe cover 12 is installed.
[0023] like Figures 1-5 As shown, one end of the first connector 5 is inserted into the inner tube 9. The second connector 6 has a first external connection port 601, an internal connection port 602, and a first side connection port 603. A first installation gap 604 is provided between the first external connection port 601 and the internal connection port 602. The first installation gap 604 communicates with the flow cavity 10. The third connector 7 has a second external connection port 701 and a second side connection port 702. The first internal connection port 602 is fixedly connected to one end of the inner tube 9. The first external connection port 601 is connected to one end of the outer tube 8. The second external connection port 701 is connected to the other end of the outer tube 8. A second installation gap 703 is provided between the second external connection port 701 and the inner tube 9. The second installation gap 703 communicates with the flow cavity 10. The first side connection port 603 communicates with the water supply manifold 2 through a first transition pipe. The second side connection port 702 communicates with the discharge manifold 3 through a second transition pipe.
[0024] like Figures 1-5 As shown, at least one bracket 13 is fixedly installed on the outer periphery of the outer tube 8. Specifically, the bracket 13 includes a first arc plate 1301 fixedly installed on the outer periphery of the outer tube 8, a first support plate 1302 fixedly installed radially on the outer periphery of the first arc plate 1301, and a second support plate 1303 fixedly installed vertically on the first support plate 1302 at one end away from the first arc plate 1301. The bracket 13 can support the outer tube 8 and improve the overall stability.
[0025] like Figures 1-5 As shown, at least one connecting frame 14 is fixedly installed on the outer periphery of the outer tube 8. Specifically, the connecting frame 14 includes a second arc plate 1401 fixedly installed on the outer periphery of the outer tube 8, a reinforcing plate 1402 fixedly installed radially on the outer periphery of the second arc plate 1401, and connecting plates 1403 respectively vertically fixed on both sides of the reinforcing plate 1402. The connecting plate 1403 is provided with a connecting hole 14031. The connecting plate 1403 is connected to the ground or a working surface such as a platform to fix the whole.
[0026] like Figures 1-5 As shown, at least one support pipe frame 15 is fixedly installed on the outer periphery of the pyrolysis gas outlet header 4 to support the pyrolysis gas outlet header 4.
[0027] like Figures 1-5 As shown, the first connector 5 has a receiving groove (not shown) at one end facing the second connector 6. A heat-resistant block 16 is provided in the receiving groove. The heat-resistant block 16 effectively prevents the first connector 5 from deforming due to excessive heat and extends the service life of the first connector 5.
[0028] The above embodiments are merely descriptions for clearly illustrating the present utility model, and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all implementations here, and the obvious variations or modifications derived therefrom are still within the protection scope of the present utility model.
Claims
1. A novel quench heat exchanger characterized in that, The device includes a pyrolysis gas inlet manifold, at least one water supply manifold, at least one discharge manifold, and a pyrolysis gas outlet manifold, all spaced apart. At least one first connector is connected to the outer periphery of the pyrolysis gas inlet manifold. At least one second connector is connected to the outer periphery of the water supply manifold. At least one third connector is connected to the outer periphery of the discharge manifold. The first connector is connected to the second connector. An outer pipe is connected between the second connector and the third connector. An inner pipe is coaxially arranged inside the outer pipe. One end of the inner pipe is connected to the second connector, and the other end passes through the second connector and connects to the pyrolysis gas outlet manifold. A flow cavity is provided between the outer pipe and the inner pipe. The first connector is connected to both the inner pipe and the pyrolysis gas inlet manifold. The second and third connectors are connected to the flow cavity. The inner pipe is connected to the pyrolysis gas outlet manifold. At least one bracket is fixedly provided on the outer periphery of the outer tube. The bracket includes a first arc plate fixedly provided on the outer periphery of the outer tube, a first support plate fixedly provided radially on the outer periphery of the first arc plate, and a second support plate fixedly provided vertically on the first support plate at one end away from the first arc plate. At least one connecting frame is fixedly provided on the outer periphery of the outer tube. The connecting frame includes a second arc plate fixedly provided on the outer periphery of the outer tube, a reinforcing plate fixedly provided radially on the outer periphery of the second arc plate, and connecting plates respectively fixedly on both sides of the reinforcing plate. The connecting plate is provided with a connecting hole.
2. The novel quench heat exchanger as claimed in claim 1, wherein, At least one coke removal pipe is connected to the outer periphery of the pyrolysis gas outlet box.
3. The novel quench heat exchanger as claimed in claim 1, wherein, At least one support pipe rack is fixedly installed on the outer periphery of the pyrolysis gas outlet header.
4. The novel quench heat exchanger according to claim 2, characterized in that, The coke removal pipe is detachably covered at the end opposite to the pyrolysis gas outlet header.
5. The novel quench heat exchanger according to claim 1, characterized in that, The first connector has a receiving groove at one end facing the second connector, and a heat-resistant block is provided in the receiving groove.