Heat exchanger for heat energy exchange of gasification furnace
By designing a multi-tube bundle heat exchanger assembly and compensator, the problem of damage to the gasifier shell during internal component replacement was solved, extending the gasifier's operating cycle and service life, and improving safety and heat exchange efficiency.
Patent Information
- Application Number
- CN202520530859.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-25
AI Technical Summary
When replacing internal components of the gasifier, the existing heat exchanger is prone to damaging the gasifier shell, resulting in a shortened operating cycle and service life.
Design a heat exchanger assembly comprising multiple tube bundles connected by connectors to form a hollow cylinder, avoiding direct replacement of the entire heat exchanger, reducing damage to the gasifier shell, and installing compensators on the feedwater downpipe to address thermal stress issues.
This improves the operating cycle and service life of the gasifier, avoids damage to the outer shell, reduces equipment maintenance costs, and ensures safety and efficient heat utilization.
Smart Images
Figure CN223882827U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gasifier manufacturing, in particular to a heat exchanger for heat exchange of a gasifier. BACKGROUND
[0002] At present, in the technical field of gasifier manufacturing, the heat exchanger (also known as heat exchanger) is a device for transferring part of the heat of hot fluid to cold fluid. With the continuous development of industrial technology, the heat exchanger plays an important role in chemical industry, petroleum, power, food and many other industrial production. In chemical production, the heat exchanger can be used as a heater, cooler, condenser, evaporator and reboiler, etc., and is widely used, and the demand for heat exchanger is increasing. However, in the process of using the heat exchanger, the following disadvantages exist: for example, when replacing the existing internal parts of the gasifier, it may cause damage to the shell of the gasifier, so as to shorten the operation cycle of the gasifier. The above-mentioned shortcomings seriously affect the performance and service life of the gasifier. Therefore, due to the above reasons, it is necessary to research and develop a new type of heat exchanger for heat exchange of a gasifier, which is of great significance to avoid damage to the shell of the gasifier and improve the operation cycle and service life of the gasifier. CONTENT OF THE INVENTION
[0003] In view of the above technical problems, the present disclosure provides a heat exchanger for heat exchange of a gasifier, characterized in that it comprises: a heat exchanger assembly located in the shell of the gasifier, and comprising a plurality of tube bundles, wherein the tube bundle comprises: an upper header section located at the top of the heat exchanger, having a curvature and provided with an outlet pipe; 2 horizontal headers, one end of which is connected to the upper header section in a medium flow manner, and the other end is sealed using a sealing plate; a plurality of circumferential tubes arranged in a circular ring shape, the upper end of the circumferential tube being connected to the upper header section; a plurality of tube panels, each comprising a plurality of radial tubes arranged in a radial direction, the upper end of the radial tube being connected to the horizontal header in a medium flow manner; a lower header section located at the bottom of the heat exchanger, having a curvature and provided with an inlet pipe, and the lower end of the circumferential tube being connected to the lower header section; 2 vertical header tanks, one end of which is connected to the lower end of the radial tube in a medium flow manner, and the other end is connected to the lower header section in a medium flow manner; a feedwater downcomer, one end of which is connected to the inlet pipe in a medium flow manner; a drain riser connected to the outlet pipe in a medium flow manner; and a drum, one end of which is connected to the other end of the feedwater downcomer in a medium flow manner.
[0004] In a preferred embodiment, connecting pieces are arranged between adjacent column tubes, and the adjacent column tubes are connected together through the connecting pieces.
[0005] In a preferred embodiment, the upper header section and the lower header section of the plurality of tube bundles are each formed into a ring shape.
[0006] In a preferred embodiment, a compensator is arranged on the feedwater downcomer in the shell of the gasifier.
[0007] In a preferred embodiment, the plurality of tube bundles are connected into a hollow cylinder through connecting pieces.
[0008] In a preferred embodiment, the inner diameter of the hollow cylinder is not less than 1800 mm.
[0009] In a preferred embodiment, the connecting pieces are flat steel.
[0010] In a preferred embodiment, two blind plates are arranged at the two ends of the upper header section and the lower header section respectively, and the two blind plates are fixed to the two ends of the upper header section and the lower header section respectively through welding.
[0011] In a preferred embodiment, the number of the plurality of tube bundles is 6 or 8 or 9 or 10.
[0012] Compared with the prior art, the beneficial effects of the present disclosure are that the technical solution of the present disclosure avoids damage to the shell of the gasifier when replacing the existing internal parts of the gasifier, and improves the operation cycle and service life of the gasifier. BRIEF DESCRIPTION OF DRAWINGS
[0013] The novel features of the application are set forth with particularity in the claims that follow. A better understanding of the features and advantages of the present application will be obtained by reference to the following detailed description that sets forth illustrative embodiments, in which the principles of the application are utilized, and the accompanying drawings of which:
[0014] Figure 1 A schematic view of a heat exchanger for heat exchange of a gasifier according to an exemplary embodiment of the present disclosure is shown; and
[0015] Figure 2 A top view of a heat exchanger for heat exchange of a gasifier according to an exemplary embodiment of the present disclosure is shown.
[0016] Reference numerals: 1 - lower header section, 2 - vertical header, 3 - tube panel, 4 - circumferential tube row, 5 - upper header section, 6 - horizontal header, 7 - riser, 8 - downcomer, 9 - compensator, 10 - shell of gasifier, 11 - heat exchanger assembly, 12 - drum. DETAILED DESCRIPTION
[0017] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. No aspect of the present disclosure is intended to be dedicated to the public regardless of whether these embodiments are ultimately claimed. Those skilled in the art will understand that various features can be substituted or combined with one another without departing from the scope of the present disclosure.
[0018] Figure 1A schematic diagram of a heat exchanger for heat exchange of a gasifier is shown according to an exemplary embodiment of the present disclosure. A heat exchanger for heat exchange of a gasifier can include a heat exchanger assembly 11. The heat exchanger assembly 11 can be located in a shell 10 of the gasifier and can include a plurality of tube banks, wherein each tube bank can include a lower header section 1, a vertical tube header 2, a tube panel 3, a circumferential tube row 4, an upper header section 5, and a horizontal header 6. The plurality of tube banks can be a plurality of detachable tube banks by which the heat exchanger assembly 11 can be composed. In a preferred embodiment, the number of the plurality of tube banks can be 6 or 8 or 9 or 10. According to the technical solution of the present disclosure, when replacing the existing internals of the gasifier, only one of the 6 (or 8 or 9 or 10) tube banks needs to be replaced each time, so that damage to the shell of the gasifier is avoided. The upper header section 5 can be located at the top of the heat exchanger, has a curvature and can be provided with an outlet pipe for discharging cold water. The included angle formed by the two ends of the upper header section 5 and the line connecting the center of the gasifier can be 60 degrees. The tube bank can include 2 horizontal headers 6. One end of the horizontal header 6 can be connected to the upper header section 5 in a medium flow manner, and the other end of the horizontal header 6 can be sealed using a sealing plate. The medium can be, for example, a gas or a fluid. The heat exchanger can include a plurality of circumferential tube rows 4 arranged in a circular ring in a circumferential direction, and the upper ends of the circumferential tube rows 4 are connected to the upper header section 5. The tube bank can include a plurality of tube panels, preferably 2 tube panels. The tube panel 3 can include a plurality of radial tube rows arranged side by side. The upper ends of the plurality of radial tube rows are flow-connected to the horizontal header 6. The lower header section 1 can be located at the bottom of the heat exchanger, has a curvature and can be provided with an inlet pipe for allowing hot gas to enter the heat exchanger. The tube panel 3 can include 2 vertical tube headers. One end of the vertical tube header 2 is flow-connected to the lower end of the radial tube row, and the other end is flow-connected to the lower header section 1. The heat exchanger can further include a drain riser 7, a feedwater downcomer 8, and a steam drum 12. The drain riser 7 can be flow-connected to the outlet pipe in a medium flow manner. One end of the feedwater downcomer 8 can be flow-connected to the inlet pipe in a medium flow manner. One end of the steam drum 12 can be flow-connected to the other end of the feedwater downcomer 8. Steam can enter the tube network of the heat exchanger through the steam drum 12 to complete efficient utilization of heat. In some embodiments, a connecting piece can be provided between adjacent circumferential tube rows 4, by which the adjacent circumferential tube rows 4 are connected together. In a preferred embodiment, the connecting piece can be a flat steel. For example, one end of the flat steel is welded to one tube row, and the other end is welded to an adjacent tube row. In other embodiments, the connecting piece can be an angle steel, a channel steel, or any connecting piece deemed appropriate by those skilled in the art.In a preferred embodiment, a compensator can be provided on the feedwater downcomer 8 within the gasifier shell 10. In a preferred embodiment, the compensator can be a flexible compensator. In other embodiments, the compensator can be a packed-type compensator, a ball-type compensator, a square-type compensator, a bellows-type compensator, and a rotating-type compensator, or any type of compensator deemed appropriate by one of skill in the art. In some embodiments, the compensator can be a plurality of flexible compensators. The plurality of flexible compensators can be two in number. The two flexible compensators can be connected in series on the feedwater downcomer 8. This technical solution can effectively solve the technical problems of free-state thermal stress and thermal contraction of the downcomer 8.
[0019] Figure 2A top view of a heat exchanger for heat exchange of a gasifier is shown according to an exemplary embodiment of the present disclosure. In a preferred embodiment, the upper header section 5 and the lower header section 1 can be formed into a ring shape. In a preferred embodiment, the plurality of tube bundles can be connected into a sealed hollow cylindrical body by connectors. In some embodiments, the plurality of tube bundles can be connected into a sealed hollow polygonal cylindrical body by connectors. This technical solution can effectively insulate the heat of the high-temperature synthesis gas in the heat exchanger assembly cavity from radiating to the inner wall of the ring cavity of the gasifier, achieving a sealing effect, eliminating the damage caused by the over-temperature phenomenon of the gasifier wall, and protecting the safety of the gasifier in use, improving the service life of the gasifier internals. In a preferred embodiment, the connector can be a flat steel. In other embodiments, the connector can be an angle steel, a channel steel, or any connector deemed appropriate by those skilled in the art. In a preferred embodiment, the inner diameter (Φ1) of the hollow cylindrical body, i.e. the distance between the two opposite tube screens 3 along the diameter of the gasifier, can be no less than 1800 mm. In some embodiments, the inner diameter of the hollow cylindrical body can be 1810 mm, 1820 mm, 1830 mm, 1840 mm, 1850 mm, 1860 mm, 1870 mm, 1880 mm, 1890 mm, 1900 mm, 1910 mm, 1920 mm, 1930 mm, 1940 mm, 1950 mm, 1960 mm, 1970 mm, 1980 mm, 1990 mm, or any length deemed appropriate by those skilled in the art. The above technical solution can reduce the wear and corrosion of the column tube wall caused by the ash and slag accumulated on the surface of the column tube wall. In some embodiments, the inner diameter (Φ1) of the hollow cylindrical body can be smaller than the inner diameter (Φ2) of the ring shape formed by the upper header section 5 and the lower header section 1, and the inner diameter of the ring shape can be smaller than the inner diameter (Φ3) of the outer shell 10 of the gasifier. The upper header section 5 and the lower header section 1 can be respectively provided with 2 blind plates at both ends, and the 2 blind plates are respectively fixed to both ends of the upper header section 5 and the lower header section 1 by welding.
[0020] Compared with the prior art, the technical solution of the present disclosure solves the technical problems of damaging the gasifier shell and affecting the long-period operation of the gasifier when replacing the existing internals of the gasifier. The technical solution of the present disclosure improves the operation cycle of the gasifier, saves the operation cost of the enterprise, effectively insulates the heat of the high-temperature synthesis gas in the heat exchanger cavity from radiating to the inner wall of the ring cavity of the gasifier, achieves a sealing effect, eliminates the damage caused by the over-temperature phenomenon of the gasifier wall, protects the safety of the gasifier in use, improves the service life of the internals of the gasifier, and solves the problems of free-state thermal stress and thermal contraction of the downcomer. The technical solution of the present disclosure is also easy to install and replace and saves materials.
[0021] It should be understood that the systems in the various embodiments provided in the present disclosure can be combined, modified and / or altered to form new technical solutions. These technical solutions should also be included in the scope of protection required by the present disclosure without creative labor.
[0022] A large number of specific examples are provided in the embodiments provided herein, and it should be understood that these examples are only for detailed description of the embodiments of the present disclosure and not a limitation of the present disclosure. The embodiments in the present disclosure can be practiced without these specific examples. In some embodiments, the structures and / or technologies well known to those skilled in the art are not shown in detail, so as not to obscure the understanding of the present disclosure.
[0023] Although the preferred embodiments of the present disclosure have been shown and described herein, it will be readily apparent to those having ordinary skill in the art that a number of changes, modifications and alternatives can be made thereto without departing from the scope of the present disclosure. It should be understood that various alternatives to the embodiments of the present disclosure described herein are optional for implementing the present disclosure. It is intended to define the scope of the present disclosure by the claims and therefrom encompass all equivalent structures and their equivalents.
Claims
1. A heat exchanger for a gasifier for exchanging heat energy, characterized in that, Comprising: a heat exchanger assembly located in the shell of the gasifier and comprising a plurality of tube bundles, wherein the tube bundles comprise: an upper header section located at the top of the heat exchanger, having a curvature and provided with outlet pipes; 2 horizontal headers, one end of which is in fluid communication with the upper header section and the other end of which is sealed using a sealing plate; a plurality of circumferential tubes arranged in a circular ring, the upper ends of the circumferential tubes being connected to the upper header section; a plurality of tube panels comprising a plurality of radial tubes arranged in a radial direction, the upper ends of the radial tubes being in fluid communication with the horizontal headers; a lower header section located at the bottom of the heat exchanger, having a curvature and provided with inlet pipes, and the lower ends of the circumferential tubes being connected to the lower header section; 2 vertical headers, one end of which is in fluid communication with the lower ends of the radial tubes and the other end of which is in fluid communication with the lower header section; a feedwater downcomer, one end of which is in fluid communication with the inlet pipes; a drain upcomer in fluid communication with the outlet pipes; and a steam drum, one end of which is in fluid communication with the other end of the feedwater downcomer.
2. The heat exchanger of claim 1, wherein wherein a connecting piece is provided between adjacent circumferential tubes, by which the adjacent circumferential tubes are connected together.
3. The heat exchanger of claim 1, wherein wherein the upper header section and the lower header section of the plurality of tube bundles are respectively formed into a ring shape.
4. The heat exchanger of claim 1, wherein wherein a compensator is provided on the feedwater downcomer inside the shell of the gasifier.
5. The heat exchanger of claim 1, wherein wherein the plurality of tube bundles are connected into a hollow cylinder by connecting pieces.
6. The heat exchanger of claim 5, wherein wherein the inner diameter of the hollow cylinder is not less than 1800mm.
7. The heat exchanger according to claim 2 or 5, characterized in that wherein the connecting pieces are flat steel.
8. The heat exchanger of claim 1, wherein wherein the upper header section and the lower header section are respectively provided with 2 blind plates at both ends, which are respectively fixed to both ends of the upper header section and the lower header section by welding.
9. The heat exchanger of claim 1, wherein wherein the number of the plurality of tube bundles is 6 or 8 or 9 or 10.