L-shaped wall pipe water bed reactor
By designing the inner and outer cylinders of the L-shaped wall tube water bed reactor and the L-shaped heat exchange tube structure, the problems of thermal expansion stress, heat exchange area, and catalyst loading and unloading in existing methane water bed reactors have been solved, thereby improving equipment safety and efficiency.
Patent Information
- Application Number
- CN202520100982.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-16
AI Technical Summary
Existing methane water bed reactors suffer from problems such as the inability to eliminate thermal expansion stress in heat exchange tubes leading to weld cracking, small specific cooling area preventing timely removal of reaction heat, and small catalyst loading with inconvenient loading and unloading.
The L-shaped wall tube water bed reactor structure, which uses L-shaped heat exchange tubes connected to the upper and lower tube sheets, eliminates thermal stress, increases the heat exchange area, increases the catalyst loading, and facilitates catalyst loading and unloading through the inner and outer cylinder design.
It effectively eliminates the risk of weld cracking, achieves temperature uniformity in the reaction zone, increases catalyst loading and reaction efficiency, and simplifies equipment maintenance.
Smart Images
Figure CN223747540U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to reactor technical field, concretely relates to a L type wall pipe water bed reactor. BACKGROUND
[0002] The heat exchange pipe of the existing methane water bed reactor generally adopts straight pipe, the two ends of the heat exchange pipe are connected with the upper and lower two flat tube plates perpendicularly, and the outer periphery of the heat exchange pipe between the upper and lower two flat tube plates is filled with catalysts.
[0003] 1. The thermal expansion stress of the heat exchange pipe cannot be eliminated, the weld between the heat exchange pipe and the flat tube plate is prone to cracking due to expansion, causing methane leakage.
[0004] 2. The specific cold area is small, and the reaction heat cannot be removed in time, so that the temperature of the reaction area is not balanced.
[0005] 3. The catalyst loading capacity is small, and the catalyst is inconvenient to load and unload. UTILITY MODEL CONTENTS
[0006] To solve the above problems, the utility model provides a L type wall pipe water bed reactor.
[0007] The utility model adopts the technical scheme that:
[0008] A L type wall pipe water bed reactor, including inner tube and outer tube, the inner tube is equipped with upper head, the outer tube is equipped with upper head and lower head, the inner tube is sleeved in the outer tube, the inner tube lower extreme is connected with the outer tube lateral wall, the annular gap is formed between the inner tube cylinder wall and the outer tube cylinder wall, the cavity surrounded by the inner tube and the outer tube lower head is equipped with upper tube plate, lower tube plate and catalyst support plate, the lower tube plate is arranged on the catalyst support plate, and a hot water cavity is formed between the catalyst support plate, the catalyst support plate is arranged in the outer tube lower head, the upper tube plate and the inner tube upper head form a steam-water mixing cavity, the upper tube plate, the inner tube, the lower tube plate and the catalyst support plate form a reaction area, the catalyst support plate and the outer tube lower head form a gas outlet cavity, and the reaction area is filled with catalysts, a plurality of L-shaped heat exchange pipes are installed between the upper tube plate and the lower tube plate, the hot water cavity and the steam-water mixing cavity are communicated through the L-shaped heat exchange pipe, the upper side of the inner tube cylinder wall is provided with a first through hole communicating the reaction area and the annular gap, and the catalyst support plate is provided with a second through hole communicating the reaction area and the gas outlet cavity.
[0009] The outer tube bottom is equipped with the reaction gas outlet pipe communicating the gas outlet cavity and the water inlet pipe communicating the hot water cavity, the outer tube lower end is equipped with the raw material gas inlet pipe communicating the annular gap, and the inner tube top is equipped with the steam outlet pipe communicating the steam-water mixing cavity.
[0010] Further, the upper tube plate is a flat tube plate, the lower tube plate is composed of a cylindrical side plate and an arc-shaped top plate, the upper end of the L-shaped heat exchange pipe vertically penetrates the upper tube plate and is communicated with the steam-water mixing cavity, and the lower end of the L-shaped heat exchange pipe is bent into an L shape towards the center part of the reactor and then penetrates the lower tube plate and is communicated with the hot water cavity.
[0011] Further, the L-shaped heat exchange pipe is integrally bent from a seamless steel pipe.
[0012] Further, the center part of the reaction zone is axially provided with a center pipe with two closed ends, the lower end of the center pipe is connected with the lower tube plate, and the upper end of the center pipe is provided with a catalyst flow-through channel between the upper tube plate.
[0013] Further, the steam outlet pipe is provided with a plurality of corrugated sleeve pipes arranged at the top of the outer cylinder, the steam outlet pipe penetrates the top of the corrugated sleeve pipe and forms an opening, and the extension end of the steam outlet pipe is fixedly connected with the corrugated sleeve pipe through a flange.
[0014] Further, the bottom of the outer cylinder is provided with a catalyst discharge pipe communicated with the reaction zone, and the top center of the inner cylinder is provided with a catalyst feeding pipe communicated with the reaction zone, and the catalyst feeding pipe penetrates the outer cylinder and forms an opening.
[0015] Further, the catalyst support plate is an arc-shaped plate with a middle part protruding upwards.
[0016] Further, the bottom of the reaction zone is provided with a first manhole, and the top of the reaction zone is provided with a temperature measuring port.
[0017] Further, an expansion cavity is arranged between the top of the inner cylinder and the outer cylinder, and the top of the outer cylinder is provided with a second manhole communicated with the expansion cavity.
[0018] Further, the raw material gas inlet pipe has two and is symmetrically arranged on both sides of the outer cylinder.
[0019] The utility model discloses the beneficial effect:
[0020] 1) adopt L-shaped heat exchange pipe as heat exchange component, and the L-shaped heat exchange pipe is connected with upper and lower tube plates after three-dimensional bending, can make the heat stress influence of heat exchange pipe to be minimum, and the welding reliability is enhanced.
[0021] 2) adopt the L-shaped heat exchange pipe of dense arrangement as heat exchange component, and the inside of pipe is circulating hot water, and the outside of pipe is methanation catalyst, and the heat exchange area is big, and the heat removal capacity is strong, can make heat remove in time, realizes reaction region temperature balance.
[0022] 3) the lower tube plate is arranged in the center part of the inner cylinder, compared with the reactor of same height, the reaction zone volume is big, the loading amount of catalyst is more, the reaction efficiency is high, saves equipment investment and land area.
[0023] 4) Inner part installation and catalyst loading and unloading are more convenient, and maintenance is more convenient. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a structure diagram of the L-shaped wall pipe water bed reactor of the application.
[0025] Figure 2 It is a structure diagram of the lower tube plate of the application. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described clearly and completely below in combination with the drawings and a preferred embodiment.
[0027] Referring to Figure 1 and Figure 2 An L-shaped wall pipe water bed reactor, comprising a vertically arranged inner cylinder 1 and a vertically arranged outer cylinder 2.
[0028] The inner cylinder 1 is provided with an upper head, the upper end of the inner cylinder 1 is closed by the inner cylinder upper head, and the lower end of the inner cylinder 1 is open; preferably, the inner cylinder upper head is an oval head, which is low in manufacturing difficulty.
[0029] The outer cylinder 2 is provided with an upper head and a lower head, the upper and lower ends of the outer cylinder 2 are closed by the outer cylinder upper head and the outer cylinder lower head, and preferably, the outer cylinder upper head and the outer cylinder lower head are spherical heads, which improve the pressure resistance.
[0030] The inner cylinder 1 is axially sleeved in the outer cylinder 2, the lower end of the inner cylinder extends above the outer cylinder lower head and is fixedly connected with the inner side wall of the outer cylinder through an annular support plate 17, the upper end of the inner cylinder extends below the outer cylinder upper head and is slidingly connected with the inner side wall of the outer cylinder, and an annular gap 101 is arranged between the inner cylinder wall above the annular support plate 17 and the outer cylinder wall.
[0031] An upper tube plate 3, a lower tube plate 4 and a catalyst support plate 5 are arranged in the cavity surrounded by the inner cylinder and the outer cylinder lower head, the catalyst support plate 5 is arranged in the outer cylinder lower head, a steam-water mixing cavity 103 is formed between the upper tube plate 3 and the inner cylinder upper head, a reaction zone 104 is formed between the upper tube plate 3, the inner cylinder 1, the lower tube plate 4 and the catalyst support plate 5, and a gas outlet cavity 105 is formed between the catalyst support plate 5 and the outer cylinder lower head, and the reaction zone is filled with catalyst; a plurality of L-shaped heat exchange pipes 6 are arranged between the upper tube plate 3 and the lower tube plate 4, the hot water cavity 102 and the steam-water mixing cavity 103 are communicated through the L-shaped heat exchange pipes 6, the upper side of the inner cylinder wall is provided with a first through hole 106 for communicating the reaction zone 104 and the annular gap 101, and the catalyst support plate 5 is provided with a second through hole 107 for communicating the reaction zone 104 and the gas outlet cavity 105.
[0032] Two raw material gas inlet pipes 9, which are symmetrical to the lower end of the outer cylinder 2, are connected to the annular gap 101, and a first manhole 16, which is connected to the reaction zone 104, is provided. The first manhole 16 is used for the maintenance of the internal components of the reaction zone. The two symmetrical raw material gas inlet pipes 9 are beneficial to the uniform distribution of the raw material gas in the annular gap 101.
[0033] The bottom of the outer cylinder 2 is provided with a reaction gas outlet pipe 7, which is connected to the gas outlet chamber 105, a water inlet pipe 8, which is connected to the hot water chamber 102, and a catalyst discharge pipe 12, which is connected to the reaction zone 104. The water inlet pipe 8 is located at the center of the bottom of the outer cylinder 2, and its upper end is vertically connected to the hot water chamber 102 through the gas outlet chamber 105. The reaction gas outlet pipe 7 and the catalyst discharge pipe 12 are respectively located on the two sides of the water inlet pipe 8. The reaction gas outlet pipe 7 is directly connected to the gas outlet chamber 105, and the upper end of the catalyst discharge pipe 12 is connected to the reaction zone through the gas outlet chamber 105 and the catalyst support plate 5, which is beneficial to the discharge of the catalyst. Two reaction gas outlet pipes 7 can be provided to improve the gas outlet speed.
[0034] The top of the outer cylinder is provided with a second manhole 15, which is connected to the expansion chamber 108. The second manhole 15 is used for the maintenance of the surface defects of the upper head of the inner cylinder.
[0035] The top of the inner cylinder 1 is provided with a catalyst feeding pipe 11, which is connected to the reaction zone 104, a temperature measuring pipe 14, and a steam outlet pipe 10, which is connected to the steam-water mixing chamber 103. The catalyst feeding pipe 11 is located at the center of the inner cylinder, and its lower end is vertically connected to the reaction zone 104 through the upper tube plate 3. The upper end of the catalyst feeding pipe 11 is vertically upwardly connected to the catalyst feeding port through the expansion chamber 108 and the upper head of the outer cylinder. In this embodiment, the steam outlet pipe 10 has two roots, which are symmetrically arranged on the two sides of the catalyst feeding pipe 11. The top of the outer cylinder 2 is provided with two corrugated sleeves, and the upper ends of the two steam outlet pipes 10 are vertically upwardly connected to the steam outlet through the expansion chamber 108 and the two corrugated sleeves. The ends of the steam outlet pipes 10, which extend out of the corrugated sleeves, are fixedly connected to the corrugated sleeves through flanges. The corrugated sleeves can protect the steam outlet pipes 10 and provide redundancy for the thermal expansion of the steam outlet pipes 10. In other embodiments, the steam outlet pipe 10 can have three or four roots. The upper end of the temperature measuring pipe 14 is vertically upwardly connected to the temperature measuring port through the expansion chamber 108 and the upper head of the outer cylinder.
[0036] The upper tube plate 3 is a flat tube plate arranged below the upper head of the inner cylinder and fixedly connected with the cylinder wall of the inner cylinder. The central part of the upper tube plate is provided with a catalyst feeding pipe through hole and a plurality of heat exchange pipe through holes A uniformly distributed around the catalyst feeding pipe through hole. The catalyst support plate 5 is an upwardly protruding arc-shaped plate, the central part of which is not provided with a hole, and the outer edge part is uniformly provided with a second through hole 107. The catalyst support plate 5 is fixedly connected in the lower head of the outer cylinder. The lower tube plate 4 is composed of a cylinder 41 and a semispherical arc-shaped plate 42. The semispherical arc-shaped plate 42 is closed and connected to the upper end of the cylinder 41. The lower end of the cylinder 41 is fixedly supported on the central part of the catalyst support plate 5 and closed by the catalyst support plate 5, that is, a hot water cavity 102 is formed between the lower tube plate 4 and the catalyst support plate 5. The cylinder 41 and the semispherical arc-shaped plate 42 are uniformly provided with heat exchange pipe through holes B.
[0037] The L-shaped heat exchange pipe 6 is integrally bent and formed from a seamless steel pipe, annularly surrounds the catalyst feeding pipe 11, and the upper end thereof is vertically connected to the heat exchange pipe through hole A of the upper tube plate 3 and communicated with the steam-water mixing cavity 103. The lower end of the L-shaped heat exchange pipe 6 vertically extends to the bottom of the reaction zone, is then bent into an L shape towards the central part of the reactor, and then is connected to the heat exchange pipe through hole B and communicated with the hot water cavity 102. The two ends of the L-shaped heat exchange pipe 6 are welded to the upper tube plate 3 and the lower tube plate 4 respectively.
[0038] The L-shaped heat exchange pipe 6 is vertically arranged by using a high-strength seamless steel pipe, which can reduce the resistance of the water path, eliminate the dead zone, minimize the resistance of the water path, facilitate the natural circulation of the water / steam mixture, fully utilize the density change and stroke difference of the water in the pipe bundle for natural circulation, and does not need to use power to force the water circulation. The circulation rate of the water can also be naturally adjusted according to the intensity of the reaction heat, and the uniformity of the temperature of the catalyst bed layer is improved.
[0039] The central part of the reaction zone 104 is axially provided with a center pipe 13 with closed two ends. The lower end of the center pipe 13 is connected to the lower tube plate 4, and the upper end of the center pipe 13 is connected to the upper tube plate 3 and provided with a catalyst flow passage. The center pipe 13 can block the accumulation of catalyst in the center of the reaction zone. The center of the reaction zone cannot be arranged with heat exchange pipes. The accumulation of catalyst will cause the reaction heat to be unable to be removed in time, and the temperature of the reaction zone is not balanced.
[0040] When the methane reactor is used:
[0041] The raw material gas enters the reactor from the two raw material gas inlet pipes 9, flows upward along the annular gap 101 to the upper end of the inner cylinder, and then enters the reaction zone 104 through the first through hole 106,
[0042] The boiler water enters the hot water cavity 102 from the water inlet pipe 8, is uniformly distributed through the lower tube plate 4, and then enters the heat exchange pipe 6 and flows upward along the heat exchange pipe 6.
[0043] The raw material gas passes through the catalyst bed from top to bottom in the reaction zone, and reacts to generate methane under the action of the catalyst; the methane gas and the unreacted raw material gas enter the gas outlet cavity 105 through the second through hole 107, and are discharged from the reactor through the reaction gas outlet pipe 7; the heat generated in the reaction process is taken away by the heat exchange pipe 6, the boiler water in the heat exchange pipe 6 is partially vaporized into water vapor after the temperature of the boiler water is increased, the steam-water mixture enters the steam-water mixing cavity 103, and is discharged from the reactor through the water vapor outlet pipe 10.
[0044] The above only describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements are also within the scope of protection of the present application.
Claims
1. An L-shaped wall-tube water-bed reactor comprising an inner cylinder (1) and an outer cylinder (2), characterized in that, The inner cylinder (1) is provided with an upper head, the outer cylinder (2) is provided with an upper head and a lower head, the inner cylinder is sleeved in the outer cylinder, the lower end of the inner cylinder is connected with the side wall of the outer cylinder, the annular gap (101) is formed between the cylinder wall of the inner cylinder and the cylinder wall of the outer cylinder, the cavity surrounded by the inner cylinder and the lower head of the outer cylinder is provided with an upper tube plate (3), a lower tube plate (4) and a catalyst support plate (5), the lower tube plate (4) is arranged on the catalyst support plate (5) and forms a hot water cavity (102) with the catalyst support plate (5), the catalyst support plate (5) is arranged in the lower head of the outer cylinder, the upper tube plate (3) and the upper head of the inner cylinder form a steam-water mixing cavity (103), the upper tube plate (3), the inner cylinder (1), the lower tube plate (4) and the catalyst support plate (5) form a reaction zone (104), the catalyst support plate (5) and the lower head of the outer cylinder form a gas outlet cavity (105), and the reaction zone is filled with catalysts; a plurality of L-shaped heat exchange pipes (6) are arranged between the upper tube plate (3) and the lower tube plate (4), the hot water cavity (102) and the steam-water mixing cavity (103) are communicated through the L-shaped heat exchange pipes (6), the upper side of the cylinder wall of the inner cylinder (1) is provided with a first through hole (106) for communicating the reaction zone (104) and the annular gap (101), and the catalyst support plate (5) is provided with a second through hole (107) for communicating the reaction zone (104) and the gas outlet cavity (105). The bottom of the outer cylinder (2) is provided with a reaction gas outlet pipe (7) for communicating the gas outlet cavity (105) and a water inlet pipe (8) for communicating the hot water cavity (102), the lower end of the outer cylinder (2) is provided with a raw material gas inlet pipe (9) for communicating the annular gap (101), and the top of the inner cylinder (1) is provided with a steam outlet pipe (10) for communicating the steam-water mixing cavity (103).
2. A L-shaped wall-tube water-bed reactor according to claim 1, characterized in that The upper tube plate (3) is a flat tube plate, the lower tube plate (4) is composed of a cylindrical side plate (41) and an arc-shaped top plate (42), the upper end of the L-shaped heat exchange pipe (6) vertically penetrates the upper tube plate (3) and communicates with the steam-water mixing cavity (103), and the lower end of the L-shaped heat exchange pipe (6) is bent into an L shape towards the center of the reactor and then penetrates the lower tube plate (4) and communicates with the hot water cavity (102).
3. A L-shaped wall-tube water bed reactor according to claim 2, characterized in that, The L-shaped heat exchange pipe (6) is integrally bent from a seamless steel pipe.
4. A L-shaped wall tubular water bed reactor according to claim 1, characterized in that, The central part of the reaction zone (104) is axially provided with a center pipe (13) with closed two ends, the lower end of the center pipe (13) is connected with the lower tube plate (4), and a catalyst flow channel is arranged between the upper end of the center pipe (13) and the upper tube plate (3).
5. The L-shaped wall-tube water-bed reactor according to claim 1, characterized in that The steam outlet pipe (10) is provided with a plurality of corrugated sleeve pipes arranged correspondingly at the top of the outer cylinder (2), the steam outlet pipe penetrates the top of the corrugated sleeve pipe to form an opening, and the extension end of the steam outlet pipe (10) is fixedly connected with the corrugated sleeve pipe through a flange.
6. A L-shaped wall-tube water bed reactor according to claim 1, characterized in that, The bottom of the outer cylinder (2) is provided with a catalyst unloading pipe (12) for communicating the reaction zone (104), and the top of the inner cylinder (1) is provided with a catalyst feeding pipe (11) for communicating the reaction zone (104), and the catalyst feeding pipe (11) penetrates the outer cylinder (2) to form an opening.
7. A L-shaped wall-tube water bed reactor according to claim 1, characterized in that, The catalyst support plate (5) is an arc-shaped plate with a middle part protruding upwards.
8. The L-shaped wall-tube water bed reactor according to claim 1, wherein The bottom of the reaction zone (104) is provided with a first manhole (16), and the top of the reaction zone (104) is provided with a temperature measuring port.
9. The L-shaped wall tubular water bed reactor according to claim 1, characterized in that, An expansion cavity (108) is arranged between the top of the inner cylinder (1) and the outer cylinder (2), and the top of the outer cylinder (2) is provided with a second manhole (15) communicating with the expansion cavity (108).
10. The L-shaped wall tubular water bed reactor according to claim 1, characterized in that, The raw material gas inlet pipe (9) has two, which are symmetrically distributed on both sides of the outer cylinder.