Partitioned overheating radiation chamber and radiation waste heat boiler gasification furnace

Abstract

The invention discloses a partitioned overheating radiation chamber and a radiation waste heat boiler gasification furnace. The partitioned overheating radiation chamber comprises an overheating screen module and a radiation waste heat boiler water cooling wall module, the overheating screen module is sequentially provided with multiple stages of temperature gradient partitions along the gas inlet direction of synthesis gas in the radiation chamber; the overheating screen modules of the adjacent temperature gradient subareas are sequentially communicated through pipelines, and multiple stages of temperature rising areas are arranged in each stage of temperature gradient subarea. The adjacent heating areas are sequentially communicated through a pipeline; the radiation waste boiler water cooling wall module is arranged at the circumferential position of the radiation chamber and connected with an external steam pocket, and the steam pocket communicates with the overheating screen module; compared with an existing gasification furnace radiant syngas boiler, the top of the overheating screen is suspended, and the overheating screen is arranged in a manner that heated tubes and light tubes are arranged in a tube array manner and integrally expand downwards; partitions are arranged in the height direction and the horizontal direction, heating intervals with different amplitudes are distributed in each area according to the radial expansion amount, and it is ensured that adjacent tube panels do not interfere with each other after expansion while radial expansion of the overheating screen is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of gasifiers, and in particular to a zoned overheating radiation chamber and a radiation waste boiler gasifier. Background Art

[0002] In the field of coal gasification, the high-temperature syngas generated by combustion in a gasifier can reach temperatures of 1300–1400°C. This heat is typically recovered through a heat pipe system, which progressively heats subcooled water into saturated steam and superheated steam. Existing technologies present the following core challenges in the layout of the superheated steam heating surface and thermal expansion control: First, the design of built-in multi-layer spiral coils is complex and has low reliability. For example, some solutions use stacked spiral coils as convection waste boiler superheating screens. Although this allows for superheated steam production within the gasifier itself, the gaps between adjacent coils are relatively small. Ash carried by the high-temperature syngas accumulates continuously within the narrow gaps, increasing local thermal resistance and overheating of the tube walls, which can cause creep cracking of the heat exchange tubes. Furthermore, the inner coils are enclosed by the outer structure, making them impossible to repair or replace online if damaged. The entire module must be disassembled and the furnace shut down, increasing the time required for each repair and reducing production efficiency.

[0003] Second, external steam superheaters increase system complexity and cost. To avoid the drawbacks of internal structures, some solutions move the superheated steam heating surface outside the gasifier. This requires the installation of a separate steam superheater to heat saturated steam into superheated steam, which increases overall cost and complexity.

[0004] Therefore, there is an urgent need for a superheated steam generation solution that combines compact layout, low dust accumulation risk, high maintainability and coordinated thermal expansion, so as to break through the technical bottlenecks of existing technologies in reliability, energy efficiency and economy. Summary of the Invention

[0005] The purpose of the present invention is to provide a zoned overheating radiation chamber and a radiation waste boiler gasifier to address the above-mentioned shortcomings. The cylindrical water-cooled wall of the gasifier produces saturated steam, and the generated saturated steam enters the superheating screen of the radiation waste boiler. The superheating screen is respectively provided with high-temperature and low-temperature zones or high-temperature, medium-temperature and low-temperature zones to solve the problems of large lateral expansion displacement and large thermal expansion stress of the superheating screen; finally, the superheating screen is arranged by suspension, and the superheating screen expands downward as a whole, avoiding the problems of multi-stage pipe threading, pipe letting and downward expansion.

[0006] The present invention is achieved through the following solutions: A zoned overheating radiation chamber comprises a superheating screen module and a radiation waste boiler water-cooled wall module; the superheating screen module is sequentially provided with multiple temperature gradient zones along the air inlet direction of the synthesis gas in the radiation chamber; the superheating screen modules of adjacent temperature gradient zones are sequentially connected through pipelines, and multiple temperature rising zones are provided in each temperature gradient zone; adjacent temperature rising zones are sequentially connected through pipelines; the radiation waste boiler water-cooled wall module is arranged at a circumferential position in the radiation chamber, the radiation waste boiler water-cooled wall module is connected to an external steam drum, and the steam drum is connected to the superheating screen module.

[0007] Based on the structure of the above-mentioned zoned superheated radiation chamber, two or three levels of temperature gradient zones are sequentially arranged in the radiation chamber along the inlet direction of the synthesis gas according to a preset temperature gradient.

[0008] Based on the structure of the above-mentioned zoned superheated radiation chamber, the number of temperature rising zones in each temperature gradient zone is determined by radial expansion data in the temperature gradient zone.

[0009] Based on the structure of the above-mentioned partitioned overheating radiation chamber, three levels of temperature gradient partitions are specifically arranged in the radiation chamber, namely, low temperature zone, medium temperature zone and high temperature zone. Adjacent temperature gradient partitions are connected by pipelines. Each level of temperature gradient partition is provided with three temperature rising zones, namely, the first temperature rising zone, the second temperature rising zone and the third temperature rising zone; each temperature rising zone is provided with multiple groups of inlet superheating screens and outlet superheating screens arranged in parallel.

[0010] Based on the structure of the above-mentioned zoned superheating radiation chamber, multiple groups of inlet superheating screens in the first temperature rising zone synchronously take in low-temperature superheated steam, and multiple groups of outlet superheating screens in the first temperature rising zone synchronously discharge high-temperature superheated steam, thereby achieving a predetermined temperature rise, and then delivering gas to the inlet superheating screens in the second temperature rising zone; Multiple groups of inlet superheating screens in the second temperature rising zone synchronously feed superheated steam, and multiple groups of outlet superheating screens in the second temperature rising zone synchronously discharge heated superheated steam gas, thereby achieving a predetermined temperature rise, and then delivering gas to the inlet superheating screens in the third temperature rising zone; Multiple groups of inlet superheating screens in the third temperature rising zone take in air synchronously, and multiple groups of outlet superheating screens in the third temperature rising zone discharge air synchronously to achieve a predetermined temperature rise, and then transport gas to the inlet superheating screen in the first temperature rising zone in the medium temperature zone; and so on, the gas is finally discharged by the outlet superheating screen in the last temperature rising zone in the high temperature zone.

[0011] Based on the structure of the above-mentioned partitioned superheating radiation chamber, the tops of all superheating screens are suspended on the cylindrical water-cooled wall through superheating screen forging plates; the bottom of each superheating screen group is connected by adjacent tubes in a U-shape, and the tubes are free to expand downward.

[0012] Based on the structure of the above-mentioned partitioned superheated radiation chamber, the radiation waste boiler water-cooled wall module includes water-cooled wall heat exchange tubes, a subcooled water inlet header and a saturated water / steam outlet header; the water-cooled wall heat exchange tubes are reciprocatingly bent in the radiation chamber to form a cylindrical water-cooled wall, the top of the cylindrical water-cooled wall is arranged near the air inlet end of the radiation chamber, and the subcooled water inlet header is arranged at the bottom of the cylindrical water-cooled wall.

[0013] Based on the structure of the above-mentioned partitioned overheating radiation chamber, the gap between adjacent overheating screens is at least 400 mm.

[0014] The present proposal also discloses a radiation waste pot gasification furnace, comprising a gasification chamber, a partitioned overheated radiation chamber, a quenching chamber and an outer shell; the gasification chamber, the partitioned overheated radiation chamber and the quenching chamber are arranged in sequence from high to low along the height direction in the outer shell, the partitioned overheated radiation chamber is connected to the gasification chamber, the quenching chamber is connected to the partitioned overheated radiation chamber, and a burner is arranged on the top of the gasification chamber.

[0015] Based on the structure of the above-mentioned radiation waste boiler gasification furnace, a support is provided between the cylindrical water-cooled wall and the outer shell.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this scheme, the heated synthesis gas will enter the superheating screen module from the air inlet end of the radiation chamber. Through multi-level temperature gradient partitioning and multi-level heating zones, the preset heating gradient is divided into multiple intervals and multiple heating zones to achieve gradual heating. In this way, the expansion of the superheating screen in a single heating zone within a single temperature gradient partition can be prevented from exceeding the preset value, so that the superheating screen module in the entire radiation chamber can expand within a safe range and will not interfere with the superheating screens on the side; the radiation waste boiler water-cooled wall module is used to convert unsaturated water into saturated water / water vapor, enter the steam drum through the pipeline, and finally enter the superheating screen module from the steam drum. This scheme sets up multi-level temperature gradient partitioning in the synthesis gas intake mode and sets multiple heating zones in each temperature gradient partition to realize the control of the heating expansion amount of each superheating screen, thereby solving the problems of large lateral expansion displacement and large thermal expansion stress of the superheating screen.

[0017] 2. Compared with the existing gasifier radiation waste boiler, the superheater is suspended on the top, and the heating tubes of the superheater are arranged in a row of bare tubes, expanding downward as a whole. There are partitions in the height and horizontal directions, and each zone is distributed with different temperature rise ranges according to the size of the radial expansion. This ensures that the superheater can expand radially while ensuring that adjacent tube panels will not interfere with each other after expansion.

[0018] 3. The minimum gap between each superheating screen in this solution is 400mm, which can meet the problems of shutdown maintenance and replacement; at the same time, each screen has a certain displacement reserved in the radial and height directions to solve the expansion problem due to different temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the low temperature zone of the present invention; Figure numerals: 1. Superheating screen module; 2. Radiation waste boiler water-cooled wall module; 3. Vaporization chamber; 4. Quenching chamber; 5. Shell; 6. Support; 7. Expansion joint; 8. Superheating screen forging plate; 9. Burner; 21. Water-cooled wall heat exchange tube; 22. Subcooled water inlet header; 23. Saturated water / steam outlet header; 31. Low temperature zone; 32. Medium temperature zone; 33. High temperature zone; 34. First temperature rising zone; 35. Second temperature rising zone; 36. Third temperature rising zone; 37. Inlet superheating screen; 38. Outlet superheating screen. DETAILED DESCRIPTION

[0020] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0021] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or similar features. In other words, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0022] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a predetermined direction, be constructed and operated in a predetermined direction, and therefore cannot be understood as a limitation on the present invention.

[0023] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of such features.

[0024] Example 1 like Figure 1~Figure 2 As shown, the present invention provides a technical solution: A partitioned overheating radiation chamber, which at least includes but is not limited to an overheating screen module 1 and a radiation waste boiler water-cooled wall module 2; the overheating screen module 1 is sequentially provided with multiple temperature gradient partitions along the inlet direction of the synthesis gas in the radiation chamber; the overheating screen modules 1 of adjacent temperature gradient partitions are sequentially connected through pipelines, and multiple temperature rising zones are provided in each temperature gradient partition; adjacent temperature rising zones are sequentially connected through pipelines; the radiation waste boiler water-cooled wall module 2 is arranged in a circumferential position of the radiation chamber, the radiation waste boiler water-cooled wall module 2 is connected to the external steam drum, and the steam drum is connected to the overheating screen module 1.

[0025] Based on the above structure, in this scheme, the heated synthesis gas will enter the superheating screen module 1 from the air inlet end of the radiation chamber. Through multi-level temperature gradient partitioning and multi-level heating zones, the preset heating gradient is divided into multiple intervals and multiple heating zones to achieve gradual heating. In this way, the expansion of the superheating screen in a single heating zone within a single temperature gradient partition can be avoided to exceed the preset value, so that the superheating screen module 1 in the entire radiation chamber can expand within a safe range and will not interfere with the superheating screens on the side; the radiation waste boiler water-cooled wall module 2 is used to convert unsaturated water into saturated water / water vapor, enter the boiler through the pipeline, and finally enter the superheating screen module 1 from the boiler. This scheme sets up multi-level temperature gradient partitioning in the synthesis gas intake mode, and sets up multiple heating zones in each temperature gradient partition to realize the control of the heating expansion amount of each superheating screen, thereby solving the problems of large lateral expansion displacement and large thermal expansion stress of the superheating screen.

[0026] As an example, according to a preset temperature gradient, two or three temperature gradient zones are sequentially set in the radiation chamber along the inlet direction of the synthesis gas.

[0027] Based on the above structure, the temperature gradient partition setting in this solution is related to the preset heating parameters of the equipment. For example, if the temperature to be heated is 100 degrees Celsius, a first-level superheating screen is usually used in the prior art to achieve heating. In this first-level superheating screen, the expansion distance is large, which will exceed the gap between adjacent superheating screens, thereby causing interference between adjacent tube screens after expansion. However, this solution adopts two or three-level temperature gradient partitions to achieve heating, that is, the 100 degrees Celsius to be heated can be divided into multiple temperature gradient partitions, so that the superheating screens in each temperature gradient partition have a smaller expansion distance, thereby avoiding expansion exceeding the limit. When two temperature gradients are set, the expansion distance of the superheating screen is relatively large, thereby preventing expansion exceeding the limit. When there is a temperature gradient partition interval, the first-level temperature gradient partition interval is 0~50 degrees Celsius, and the second-level temperature gradient partition interval is 0~50 degrees Celsius, so that the final temperature rise is 100 degrees Celsius; when three temperature gradient partition intervals are set, the first-level temperature gradient partition interval is 0~30 degrees Celsius, the second-level temperature gradient partition interval is 0~30 degrees Celsius, and the third-level temperature gradient partition interval is 0~40 degrees Celsius; so that the final temperature rise is 100 degrees Celsius; the more temperature gradient partitions there are, the smaller the temperature rise range within each temperature gradient partition, the smaller the expansion distance of the overheating screen will be, and the expansion distance control of the overheating screen can be better achieved.

[0028] As an example, the number of temperature rising zones within each temperature gradient zone is determined by radial expansion data within the temperature gradient zone.

[0029] Based on the above structure, the main purpose of this scheme is to avoid interference between adjacent overheating screens due to expansion. Although the temperature to be heated can be divided into several larger levels when performing multi-level temperature gradient zoning, the temperature gradient range within each level is still large. In order to more accurately control the expansion distance of the overheating screen and prevent the overheating screen in each heating zone from interfering after expansion, this party divides each temperature gradient zone into multiple heating zones. Each heating zone further divides the data to be heated at this level into smaller heating intervals. In this way, a smaller overheating screen expansion distance setting can be achieved. Taking the above-mentioned 100 degrees Celsius divided into 3 temperature gradient zones as an example, the temperature to be heated in the first-level temperature gradient zone is 30 degrees Celsius. The first temperature gradient zone can be divided into 3 heating intervals according to demand, and the heating temperature of each heating interval is 10 degrees Celsius. In this way, the overheating screen can be avoided from expanding beyond the limit.

[0030] As an example, the gap between adjacent superheating screens is guaranteed to be more than 400mm, so that the ash generated by the gasification reaction will not cause bridging between the tube screens. At the same time, after the furnace is shut down, there is space between the tube screens for maintenance and replacement.

[0031] As an example, a specific radiation chamber is provided with three temperature gradient zones, namely, a low temperature zone 31, a medium temperature zone 32, and a high temperature zone 33. Adjacent temperature gradient zones are connected by pipes. Each temperature gradient zone can be provided with three temperature rising zones, namely, a first temperature rising zone 34, a second temperature rising zone 35, and a third temperature rising zone 36. In each temperature rising zone, multiple sets of inlet superheating screens 37 and outlet superheating screens 38 are provided in parallel. Multiple groups of inlet superheating screens 37 in the first temperature rising zone 34 are synchronously fed with air, and multiple groups of outlet superheating screens 38 in the first temperature rising zone 34 are synchronously fed with air, so as to achieve a predetermined temperature rise, and then gas is delivered to the inlet superheating screens 37 in the second temperature rising zone 35; Multiple groups of inlet superheating screens 37 in the second temperature rising zone 35 are synchronously fed with air, and multiple groups of outlet superheating screens 38 in the second temperature rising zone 35 are synchronously fed with air, so as to achieve a predetermined temperature rise, and then the air is delivered to the inlet superheating screens 37 in the third temperature rising zone 36; Multiple groups of inlet superheating screens 37 in the third temperature rising zone 36 simultaneously take in air, and multiple groups of outlet superheating screens 38 in the third temperature rising zone 36 simultaneously discharge air, achieving a predetermined temperature rise. Then, air is delivered to the inlet superheating screens 37 in the first temperature rising zone 34 of the medium temperature zone 32. Similarly, the air is finally discharged by the outlet superheating screens 38 in the last temperature rising zone of the high temperature zone 33, achieving the final temperature rise.

[0032] The superheating screen module 1 is divided into a low-temperature zone 31, a medium-temperature zone 32 and a high-temperature zone 33, wherein the low-temperature zone 31 is at the top, the medium-temperature zone 32 is in the middle, and the high-temperature zone 33 is at the bottom. This ensures that the synthesis gas with the highest temperature first contacts the superheating screen in the low-temperature zone 31 where the heat medium temperature of the pipe is the lowest, and passes through the medium-temperature zone 32 and the high-temperature zone 33 in turn. This arrangement can minimize the influence of the external synthesis gas temperature on the pipe wall temperature, and is beneficial to the selection of materials for the heated pipe.

[0033] In this solution, a low temperature zone 31 inlet superheating screen 37 and a low temperature zone 31 outlet superheating screen 38 are respectively set in each temperature rising zone in the low temperature zone 31; a medium temperature zone 32 inlet superheating screen 37 and a low-medium temperature zone 32 outlet superheating screen 38 are respectively set in each temperature rising zone in the medium temperature zone 32; a high temperature zone 33 inlet superheating screen 37 and a high temperature zone 33 outlet superheating screen 38 are respectively set in each temperature rising zone in the high temperature zone 33.

[0034] As an example, all the superheating panels are suspended on the cylindrical water-cooled wall through the superheating panel forging plates 8, so that the weight of the superheating panels can be transferred to the cylindrical water-cooled wall.

[0035] As an example, the bottom of each superheating screen group is connected by adjacent tubes in a U-shape, and the tubes are free to expand downward.

[0036] As an example, the radiation waste boiler water-cooled wall module 2 may include a water-cooled wall heat exchange tube 21, a subcooled water inlet header 22 and a saturated water / steam outlet header 23; the water-cooled wall heat exchange tube 21 is a cylindrical water-cooled wall in the radiation chamber, the top of the cylindrical water-cooled wall is arranged close to the air inlet end of the radiation chamber, and the subcooled water inlet header 22 is arranged at the bottom position of the cylindrical water-cooled wall.

[0037] Based on the above structure, the process of saturated steam generation in this scheme is as follows: unsaturated water enters the water-cooled wall of the vaporizer 3 and the water-cooled wall of the radiation waste boiler from the downcomer of the steam drum. After the unsaturated water absorbs heat upward, it becomes saturated water / water vapor and enters the steam drum through the riser; The process of superheated steam generation is as follows: the saturated steam separated from the steam drum enters the inlet and outlet superheating screens 38 of the superheated steam low-temperature zone 31 and exchanges heat with the external high-temperature synthesis gas, and the saturated steam becomes superheated steam with low superheat. The heated superheated steam then enters the inlet and outlet superheating screens 38 of the superheated steam medium-temperature zone 32 and exchanges heat with the medium-temperature synthesis gas, and the superheated steam with low superheat is heated to superheated steam with medium superheat; finally, the superheated steam enters the inlet and outlet superheating screens 38 of the superheated steam high-temperature zone 33 and exchanges heat with the low-temperature synthesis gas, and the superheated steam with medium superheat is heated to superheated steam with high superheat.

[0038] In this solution, the number of heating zones in each of the low-temperature zone 31, medium-temperature zone 32, and high-temperature zone 33 is determined based on radial expansion. This ensures that the radial expansion of the superheater panels is less than the gap between adjacent panels, preventing interference between adjacent panels after expansion. Furthermore, the gap between adjacent panels is maintained at a minimum of 400 mm to prevent ash generated by the gasification reaction from bridging the panels. Furthermore, after shutdown, there is sufficient space between the panels for maintenance and replacement.

[0039] Example 2 The present invention provides a technical solution: A radiation waste boiler gasification furnace, which at least includes but is not limited to a gasification chamber 3, a partitioned overheated radiation chamber, a quenching chamber 4 and an outer shell 5; the gasification chamber 3, the partitioned overheated radiation chamber, and the quenching chamber 4 are arranged in sequence from high to low along the height direction in the outer shell 5, the partitioned overheated radiation chamber is connected to the gasification chamber 3, the quenching chamber 4 is connected to the partitioned overheated radiation chamber, and a burner 9 is arranged on the top of the gasification chamber 3.

[0040] Based on the above structure, the pulverized coal entering the gasifier is gasified and burned through the burner 9 to generate synthesis gas. The high-temperature synthesis gas descends from the gasification chamber 3 into the radiation chamber, and exchanges heat with the superheating screen module 1 and the radiation waste boiler water-cooled wall module 2 in the radiation chamber. The other gases finally produced enter the quenching chamber 4 and are finally discharged from the quenching chamber 4 to the gasification furnace.

[0041] As an example, a support 6 is provided between the cylindrical water-cooled wall and the shell 5 , and an expansion joint 7 may also be provided between the cylindrical water-cooled wall and the quenching chamber 4 .

[0042] Based on the above structure, the weight of the cylindrical water-cooled wall and all superheated screens is loaded onto the supports 6 on the inner wall of the shell through the supports 6 on the cylinder body, and finally transferred to the gasifier shell 5. Since the superheated screen module 1 of the radiation chamber is suspended by forgings, it can expand freely downward.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A zoned superheated radiation chamber, characterized in that: The invention comprises an overheating screen module (1) and a radiation waste boiler water-cooled wall module (2); the overheating screen module (1) is sequentially provided with multiple temperature gradient partitions along the inlet direction of the synthesis gas in the radiation chamber; the overheating screen modules (1) of adjacent temperature gradient partitions are sequentially connected through pipelines, and multiple temperature rising zones are provided in each temperature gradient partition; adjacent temperature rising zones are sequentially connected through pipelines; the radiation waste boiler water-cooled wall module (2) is arranged at a circumferential position of the radiation chamber, the radiation waste boiler water-cooled wall module (2) is connected to an external steam drum, and the steam drum is connected to the overheating screen module (1).

2. A zoned superheated radiation chamber according to claim 1, characterized in that: According to the preset temperature rising gradient, at least two levels of temperature gradient partitions are sequentially arranged in the radiation chamber along the inlet direction of the synthesis gas.

3. The zoned superheated radiation chamber according to claim 1, characterized in that: The number of temperature rising zones within each temperature gradient zone is determined by radial expansion data within the temperature gradient zone.

4. The zoned superheated radiation chamber according to claim 1, characterized in that: The radiation chamber is specifically provided with three levels of temperature gradient partitions, namely, a low temperature zone (31), a medium temperature zone (32) and a high temperature zone (33). Adjacent temperature gradient partitions are connected by pipelines. Each level of temperature gradient partition is provided with three temperature rising zones, namely, a first temperature rising zone (34), a second temperature rising zone (35) and a third temperature rising zone (36). In each temperature rising zone, a plurality of groups of inlet superheating screens (37) and outlet superheating screens (38) arranged in parallel are provided.

5. A zoned superheated radiation chamber according to claim 4, characterized in that: Multiple groups of inlet superheating screens (37) in the first temperature rising zone (34) synchronously take in superheated gas, and multiple groups of outlet superheating screens (38) in the first temperature rising zone (34) synchronously discharge superheated gas, thereby achieving a predetermined temperature rise, and then delivering superheated gas to the inlet superheating screens (37) in the second temperature rising zone (35); Multiple groups of inlet superheating screens (37) in the second temperature rising zone (35) synchronously take in superheated gas, and multiple groups of outlet superheating screens (38) in the second temperature rising zone (35) synchronously discharge superheated gas, thereby achieving a predetermined temperature rise, and then delivering superheated gas to the inlet superheating screens (37) in the third temperature rising zone (36); Multiple groups of inlet superheating screens (37) in the third temperature rising zone (36) simultaneously take in superheated gas, and multiple groups of outlet superheating screens (38) in the third temperature rising zone (36) simultaneously discharge superheated gas, thereby achieving a predetermined temperature rise, and then transporting superheated gas to the inlet superheating screen (37) in the first temperature rising zone (34) of the medium temperature zone (32); and so on, the gas is finally discharged by the outlet superheating screen (38) of the last temperature rising zone of the high temperature zone (33).

6. A zoned superheated radiation chamber according to claim 5, characterized in that: The tops of all superheating screens are suspended on the cylindrical water-cooled wall through superheating screen forging plates (8); the bottoms of each superheating screen group are connected by U-shaped adjacent tubes, and the tubes are free to expand downward.

7. A zoned superheated radiation chamber according to claim 6, characterized in that: The radiation waste boiler water-cooled wall module (2) comprises a water-cooled wall heat exchange tube (21), a subcooled water inlet header (22) and a saturated water / steam outlet header (23); the water-cooled wall heat exchange tube (21) forms a cylindrical water-cooled wall in the radiation chamber, the top of the cylindrical water-cooled wall is arranged close to the air inlet end of the radiation chamber, and the subcooled water inlet header (22) is arranged at the bottom of the cylindrical water-cooled wall.

8. A zoned superheated radiation chamber according to claim 7, characterized in that: The gap between adjacent superheating screens is at least 400mm.

9. A radiation waste boiler gasifier, characterized by: It comprises a vaporization chamber (3), a partitioned overheated radiation chamber as described in any one of claims 1 to 8, a quenching chamber (4) and an outer shell (5); the vaporization chamber (3), the partitioned overheated radiation chamber and the quenching chamber (4) are arranged in order from high to low along the height direction in the outer shell (5), the partitioned overheated radiation chamber is connected to the vaporization chamber (3), the quenching chamber (4) is connected to the partitioned overheated radiation chamber, and a burner (9) is provided on the top of the vaporization chamber (3).

10. The radiant waste boiler gasifier according to claim 9, characterized in that: A support (6) is provided between the cylindrical water-cooled wall and the outer shell (5).

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