Straight-through compartment corner tube boiler with built-in steam superheater for hydrogen and gas combustion

Abstract

The invention discloses a hydrogen-fired gas built-in steam superheater straight-through compartment corner tube boiler which comprises a boiler body and a burner, and the boiler body comprises a boiler barrel, a burner water cooling surface, a front radiation combustion chamber, a middle-rear superheated steam chamber, a rear evaporation heating surface, a downcomer, a connecting pipe and a gas collecting pipe. The front radiation combustion chamber, the middle-rear superheated steam chamber and the rear evaporation heating surface are communicated with one another, an air inlet is formed in the water cooling surface of the combustor, the combustor is arranged on the air inlet, a radiation evaporation screen is arranged in the front radiation combustion chamber, a steam superheater is arranged in the middle-rear superheated steam chamber, and the rear evaporation heating surface is arranged on the steam superheater. According to the device, gas can be combusted more sufficiently in the front radiation combustion chamber, saturated steam can be heated into high-temperature and high-pressure superheated steam in the middle-rear superheated steam chamber, the device is used for industrial production, harmful gas is reduced, and the device is suitable for industrial production. And heat efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler, in particular to a hydrogen gas combustion built-in steam superheater straight-through compartment corner tube boiler. BACKGROUND

[0002] It is known that the traditional corner tube boiler does not have independent compartments for the front radiation combustion chamber, the middle and rear superheated steam chamber and the rear evaporation heating surface, the gas combustion in the front radiation combustion chamber is uneven, the fuel combustion is insufficient, the combustion chamber flame fullness is not high, the steam superheater in the middle and rear superheated steam chamber and the high-temperature flue gas heat exchange are uneven, the temperature fluctuates unstably, the superheated steam dryness contains a large amount of moisture, and high-quality high-temperature high-pressure steam cannot be met, so a hydrogen gas combustion built-in steam superheater straight-through compartment corner tube boiler is provided to solve the above problems. SUMMARY

[0003] The present application aims to provide a hydrogen gas combustion built-in steam superheater straight-through compartment corner tube boiler to solve the problems existing in the prior art, by arranging the front radiation combustion chamber, the middle and rear superheated steam chamber and the rear evaporation heating surface as independent compartments, the gas combustion in the boiler is more uniform, the fuel combustion is more sufficient, the combustion chamber flame fullness is higher, the steam superheater in the middle and rear superheated steam chamber and the high-temperature flue gas heat exchange are more uniform, the temperature is more stable, the superheated steam dryness contains less moisture, the boiler thermal efficiency is improved, and high-quality superheated steam is produced for industrial production.

[0004] To achieve the above-mentioned purpose, the present application provides the following scheme: the present application provides a hydrogen gas combustion built-in steam superheater straight-through compartment corner tube boiler, which comprises: A boiler body and a burner, the boiler body comprises a boiler drum, a burner water-cooled surface, a front radiation combustion chamber, a middle and rear superheated steam chamber, a rear evaporation heating surface, a downcomer, a connecting pipe and a gas collecting pipe, the front radiation combustion chamber, the middle and rear superheated steam chamber and the rear evaporation heating surface are interconnected, the burner water-cooled surface is provided with an air inlet, the air inlet is provided with a burner, the front radiation combustion chamber is provided with a radiation evaporation screen, the middle and rear superheated steam chamber is provided with a steam superheater, and the rear evaporation heating surface is provided with a flue gas outlet; The circulating pipe comprises a front downcomer, a rear downcomer and a downcomer, one end of the front downcomer is communicated with the left and right side water-cooled wall lower header, the other end of the front downcomer is communicated with the boiler drum, one end of the rear downcomer is communicated with the left and right side water-cooled wall lower header, and the other end of the rear downcomer is communicated with the left and right side water-cooled wall upper header. One end of the downcomer is communicated with the radiation evaporation screen lower header, the other end of the downcomer is communicated with the boiler drum, and the boiler drum is provided with a feedwater pipe and a saturated steam outlet pipe.

[0005] Preferably, the front radiation combustion chamber is formed by the space surrounded by the burner water-cooled surface, the sealing plate, the back water-cooled wall of the furnace, the left and right side water-cooled walls, the upper header of the burner water-cooled surface, the lower header of the burner water-cooled surface, the upper header of the back water-cooled wall of the furnace, the lower header of the back water-cooled wall of the furnace, the upper header of the radiation evaporation screen and the lower header of the radiation evaporation screen. The burner water-cooled surface is in communication with the upper header and the lower header of the burner water-cooled surface, respectively. The back water-cooled wall of the furnace is in communication with the upper header and the lower header of the back water-cooled wall of the furnace, respectively. The left and right side water-cooled walls are in communication with the upper header and the lower header of the left and right side water-cooled walls, respectively. The upper headers of the burner water-cooled surface, the back water-cooled wall of the furnace and the radiation evaporation screen are connected by the sealing plate. The lower headers of the burner water-cooled surface, the back water-cooled wall of the furnace and the radiation evaporation screen are connected by the sealing plate. The left and right side water-cooled walls are fixedly connected to the burner water-cooled surface and the back water-cooled wall of the furnace.

[0006] Preferably, the middle and back superheated steam chamber is formed by the space surrounded by the back water-cooled wall of the furnace, the back water-cooled wall of the passage, the upper header of the back water-cooled wall of the furnace, the lower header of the back water-cooled wall of the furnace, the upper header of the back water-cooled wall of the passage, the inlet header of the steam superheater, the outlet header of the steam superheater and the sealing plate. The back water-cooled wall of the passage is in communication with the lower header and the upper header of the back water-cooled wall of the passage, respectively. The upper headers of the back water-cooled wall of the furnace, the inlet header of the steam superheater, the outlet header of the steam superheater and the upper header of the back water-cooled wall of the passage are fixedly connected by the sealing plate. The left and right side water-cooled walls are fixedly connected to the back water-cooled wall of the furnace and the back water-cooled wall of the passage.

[0007] Preferably, the back evaporation heating surface can be provided with two or more groups of spiral finned convection tube bundles. The two ends of the spiral finned convection tube bundle are in communication with the upper header and the lower header of the back evaporation heating surface, respectively.

[0008] Preferably, the two ends of the radiation evaporation screen are in communication with the upper header and the lower header of the radiation evaporation screen, respectively. One end of the downcomer is in communication with the lower header of the radiation evaporation screen, and the other end is in communication with the drum.

[0009] Preferably, one end of the steam superheater is in communication with the inlet header of the steam superheater, and the other end is in communication with the outlet header of the steam superheater. The inlet header of the steam superheater is connected with the saturated steam inlet pipe, and the outlet header of the steam superheater is connected with the superheated steam outlet pipe.

[0010] Preferably, the drum is communicated with a plurality of gas collecting pipes, the left and right side water-cooled walls are communicated with the gas collecting pipes through a plurality of connecting pipes II, the combustion water-cooled surface upper header, the radiation evaporation screen upper header, the rear water-cooled wall of the furnace upper header, the rear water-cooled wall of the pass upper header and the rear evaporation heating surface upper header are communicated with the gas collecting pipes and the left and right side water-cooled wall upper headers through connecting pipes I and connecting pipes IV respectively, the combustion water-cooled surface lower header, the rear water-cooled wall of the furnace lower header and the rear evaporation heating surface lower header are communicated with the left and right side water-cooled wall lower headers through connecting pipes III respectively, and the radiation evaporation screen lower header is communicated with the drum through a downcomer.

[0011] Preferably, the flue gas outlet is arranged at the rear of the rear evaporation heating surface.

[0012] Preferably, the burner is a water-cooled premix stable combustion burner or a direct combustion burner.

[0013] Preferably, the rear water-cooled wall of the furnace and the rear water-cooled wall of the pass are light-pipe water-cooled walls, flue gas directly passes through the gaps between the light pipes of the rear water-cooled wall of the furnace to enter the middle and rear superheated steam chamber to conduct convective heat exchange with the steam superheater, and then passes through the gaps between the light pipes of the rear water-cooled wall of the pass to enter the rear evaporation heating surface to conduct heat exchange and then is discharged from the flue gas outlet.

[0014] Preferably, the middle and rear superheated steam chamber is arranged to provide space for the steam superheater and thus increase the heat exchange area, so that the temperature reaches the SNCR reaction temperature, the denitration in the furnace can be conducted, the generation of nitrogen oxides is reduced, and the boiler efficiency is improved.

[0015] The application discloses the following technical effects: the hydrogen-gas-fired built-in steam superheater straight-through multi-chamber angle pipe boiler is provided, the front radiation combustion chamber, the middle and rear superheated steam chamber and the rear evaporation heating surface are independently arranged in separate chambers, the gas combustion in the boiler is more uniform, the fuel combustion is more sufficient, the combustion chamber has higher fullness of flame, the steam superheater in the middle and rear superheated steam chamber and the high-temperature flue gas conduct more uniform heat exchange, the temperature is more stable, the superheated steam has small dryness fraction and moisture content, the boiler thermal efficiency is improved, and high-quality superheated steam is generated for industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0017] Figure 1It is a structure schematic view of the first embodiment of the hydrogen combustion gas built-in steam superheater straight-through sub-chamber corner pipe boiler of the present application. Figure 2 It is a side view of the first embodiment of the present application. Figure 3 It is a top view of the first embodiment of the present application. Figure 4 It is a structure schematic view of the second embodiment of the present application. Wherein, 1, left and right side water wall lower header; 2, front downcomer; 3, burner; 4, burner water cooling surface; 5, front radiation combustion chamber; 6, drum; 7, left and right side water wall upper header; 8, left and right side water wall; 9, burner water cooling surface upper header; 10, sealing plate; 11, connecting pipe I; 12, furnace back water wall upper header; 13, saturated steam inlet pipe; 14, steam superheater inlet header; 15, superheated steam outlet pipe; 16, steam superheater outlet header; 17, middle and rear superheated steam chamber; 18, passage back water wall upper header; 19, rear evaporation heating surface upper header; 20, connecting pipe II; 21, rear downcomer; 22, spiral finned tube bundle; 23, rear evaporation heating surface; 24, passage back water wall; 25, steam superheater; 26, furnace back water wall; 27, flue gas outlet; 28, rear evaporation heating surface lower header; 29, connecting pipe III; 30, furnace back water wall lower header; 31, downcomer; 32, burner water cooling surface lower header; 33, saturated steam outlet pipe; 34, connecting pipe IV; 35, gas collecting pipe; 36, feed water pipe; 37, radiation evaporation screen upper header; 38, radiation evaporation screen; 39, radiation evaporation screen lower header. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments. Embodiment one

[0020] Reference Figure 1 , Figure 2 , Figure 3 A hydrogen combustion gas built-in steam superheater straight-through sub-chamber corner pipe boiler, comprising: The boiler body comprises a boiler drum 6, a burner water cooling surface 4, a front radiation combustion chamber 5, a middle and rear superheated steam chamber 17, and a rear evaporation heating surface 23, the front radiation combustion chamber 5, the middle and rear superheated steam chamber 17 and the rear evaporation heating surface 23 are communicated with each other, the burner water cooling surface 4 is provided with an air inlet, the air inlet is provided with a burner 3, the front radiation combustion chamber 5 is provided with a radiation evaporation screen 38, the middle and rear superheated steam chamber 17 is provided with a steam superheater 25, and the rear evaporation heating surface 23 is provided with a flue gas outlet 27. The circulating pipe comprises a front downcomer 2, a rear downcomer 21 and a downcomer 31, one end of the front downcomer 2 is communicated with the left and right side water cooling wall lower headers 1, the other end of the front downcomer 2 is communicated with the boiler drum 6, one end of the rear downcomer 21 is communicated with the left and right side water cooling wall lower headers 1, and the other end of the rear downcomer 21 is communicated with the left and right side water cooling wall upper headers 7, one end of the downcomer 31 is communicated with the radiation evaporation screen lower header 39, and the other end of the downcomer 31 is communicated with the boiler drum 6, and the boiler drum 6 is provided with a feed water pipe 36 and a saturated steam outlet pipe 33.

[0021] Further optimization scheme, the front radiation combustion chamber 5 is formed by the space surrounded by the burner water cooling surface 4, the sealing plate 10, the furnace rear water cooling wall 26, the left and right side water cooling walls 8, the burner water cooling surface upper header 9, the burner water cooling surface lower header 32, the furnace rear water cooling wall upper header 12, the furnace rear water cooling wall lower header 30, the radiation evaporation screen upper header 37 and the radiation evaporation screen lower header 39, the burner water cooling surface 4 is communicated with the burner water cooling surface upper header 9 and the burner water cooling surface lower header 32 respectively, the furnace rear water cooling wall 26 is communicated with the furnace rear water cooling wall upper header 12 and the furnace rear water cooling wall lower header 30 respectively, the left and right side water cooling walls 8 are communicated with the left and right side water cooling wall upper headers 7 and the left and right side water cooling wall lower headers 1 respectively, the burner water cooling surface upper header 9, the furnace rear water cooling wall upper header 12 and the radiation evaporation screen upper header 37 are connected through the sealing plate 10, the burner water cooling surface lower header 32, the furnace rear water cooling wall lower header 30 and the radiation evaporation screen lower header 39 are connected through the sealing plate 10, and the left and right side water cooling walls 8 are fixedly connected to the two sides of the burner water cooling surface 4 and the furnace rear water cooling wall 26.

[0022] Further optimization scheme, the rear overheat steam chamber 17 is formed by the space surrounded by the rear water wall 26, the passage rear water wall 24, the rear water wall lower header 30, the rear water wall upper header 12, the passage rear water wall upper header 18, the steam superheater inlet header 14, the steam superheater outlet header 16 and the sealing plate 10, the passage rear water wall 24 is communicated with the rear water wall lower header 30 and the passage rear water wall upper header 18 respectively, the rear water wall upper header 12, the steam superheater inlet header 14, the steam superheater outlet header 16 and the passage rear water wall upper header 18 are fixedly connected through the sealing plate 10, the rear water wall 26 and the passage rear water wall 24 are fixedly connected with the left and right side water walls 8 on both sides.

[0023] Further optimization scheme, the rear evaporation heating surface 23 can be provided with two or more groups of spiral finned tube bundles 22, and the two ends of the spiral finned tube bundles 22 are communicated with the rear evaporation heating surface upper header 19 and the rear evaporation heating surface lower header 28 respectively.

[0024] Further optimization scheme, the radiation evaporation screen 38 is communicated with the radiation evaporation screen upper header 37 and the radiation evaporation screen lower header 39 at two ends respectively, and the downcomer 31 is communicated with the radiation evaporation screen lower header 39 at one end and with the drum 6 at the other end.

[0025] Further optimization scheme, the steam superheater 25 is communicated with the steam superheater inlet header 14 at one end and with the steam superheater outlet header 16 at the other end, the steam superheater inlet header 14 is connected with the saturated steam inlet pipe 13, and the steam superheater outlet header 16 is connected with the superheated steam outlet pipe 15.

[0026] Further optimization scheme, the drum 6 is communicated with a plurality of gas collecting pipes 35, a plurality of connecting pipes II 20 are communicated between the left and right side water wall upper headers 7 and the gas collecting pipes 35, the combustion water cooled surface upper header 9, the radiation evaporation screen upper header 37, the rear water wall upper header 12, the passage rear water wall upper header 18 and the rear evaporation heating surface upper header 19 are respectively communicated with the gas collecting pipes 35 and the left and right side water wall upper headers 7 through the connecting pipe I 11 and the connecting pipe IV 34, the combustion water cooled surface lower header 32, the rear water wall lower header 30 and the rear evaporation heating surface lower header 28 are respectively communicated with the left and right side water wall lower headers 1 through the connecting pipe III 29, and the radiation evaporation screen lower header 39 is communicated with the drum 6 through the downcomer 31.

[0027] Further optimization scheme, the flue gas outlet 27 is arranged at the rear of the rear evaporation heating surface 23.

[0028] Further optimization scheme, the combustor 3 is a water-cooled premixed stable combustion burner.

[0029] Further optimization scheme, the furnace back water wall 26, the passage back water wall 24 is a light pipe water wall, the flue gas directly enters the middle and rear superheated steam chamber 17 and the steam superheater 25 to carry out convection heat exchange through the gap between the light pipes of the furnace back water wall 26, and then enters the rear evaporation heating surface 23 to carry out heat exchange through the gap between the light pipes of the passage back water wall 24 and is discharged from the flue gas outlet 27.

[0030] Further optimization scheme, the middle and rear superheated steam chamber 17 is provided to provide space for the steam superheater 25 and thereby increase the heat exchange area, so that the temperature reaches the SNCR reaction temperature, and the in-furnace denitration can be carried out, the generation of nitrogen oxides is reduced, and the boiler efficiency is improved.

[0031] Working principle: first, the combustor 3 is started, the fuel combustion provides heat energy, including flame and high-temperature flue gas, the flame and high-temperature flue gas flow in the flue gas flow-through channel composed of the combustor water-cooled surface 4, the left and right side water-cooled walls 8, the radiation evaporation screen 38, the furnace back water wall 26, the passage back water wall 24 and the rear evaporation heating surface 23. In this flue gas flow-through channel, heat is transferred to the water and other heat transfer media in the boiler through flame radiation and flue gas convection heat transfer, wherein the arrangement of the steam superheater 25 in the middle and rear superheated steam chamber 17 increases the heat exchange area, and the saturated steam can be better heated to high-temperature and high-pressure superheated steam for industrial production, and the increase of the heating surface reduces the temperature of the flue gas to reach the SNCR reaction temperature, so that the denitration requirement is met, and the generation of nitrogen oxides is reduced. The function of the rear evaporation heating surface 23 is to further absorb the heat of the flue gas and reduce the exhaust gas temperature. This design can increase the heat transfer surface area, so that the heat energy in the flue gas can be more effectively transferred to the water or other heat transfer media, and the heat transfer efficiency is improved. Embodiment two

[0032] Reference Figure 4 The difference between the embodiment and the embodiment one is that the combustor is changed from a water-cooled premixed burner to a direct combustion burner.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present application.

[0034] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes, characterized in that, include: The boiler body includes a boiler drum, a burner water-cooled surface, a front radiant combustion chamber, a middle and rear superheated steam chamber, a rear evaporative heating surface, downcomers, connecting pipes, and gas collecting pipes. The front radiant combustion chamber, the middle and rear superheated steam chamber, and the rear evaporative heating surface are interconnected. An air inlet is provided on the burner water-cooled surface, and a burner is installed on the air inlet. A radiant evaporation screen is provided in the front radiant combustion chamber, a steam superheater is provided in the middle and rear superheated steam chamber, and a flue gas outlet is provided on the rear evaporative heating surface. The circulation pipe includes a front downcomer, a rear downcomer, and a downcomer. One end of the front downcomer is connected to the lower header of the left and right water-cooled walls, and the other end of the front downcomer is connected to the boiler drum. One end of the rear downcomer is connected to the lower header of the left and right water-cooled walls, and the other end of the rear downcomer is connected to the upper header of the left and right water-cooled walls. One end of the downcomer is connected to the lower header of the radiation evaporation screen, and the other end of the downcomer is connected to the boiler drum. A water supply pipe and a saturated steam outlet pipe are provided on the boiler drum.

2. The hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: The aforementioned front radiant combustion chamber is formed by a space enclosed by a burner water-cooled surface, a sealing plate, a rear water-cooled wall of the furnace, left and right side water-cooled walls, a header on the burner water-cooled surface, a header on the lower part of the burner water-cooled surface, a header on the upper part of the rear water-cooled wall of the furnace, a header on the lower part of the rear water-cooled wall of the furnace, a header on the upper part of the radiant evaporation screen, and a header on the lower part of the radiant evaporation screen. The burner water-cooled surface is connected to the header on the upper part of the burner water-cooled surface and the header on the lower part of the burner water-cooled surface, respectively. The rear water-cooled wall of the furnace is connected to the header on the upper part of the rear water-cooled wall of the furnace and the header on the lower part of the furnace. The lower header of the rear water-cooled wall is connected, and the left and right water-cooled walls are respectively connected to the upper headers of the left and right water-cooled walls and the lower headers of the left and right water-cooled walls. The upper header of the burner water-cooled wall, the upper header of the rear water-cooled wall of the furnace, and the upper header of the radiation evaporation screen are connected by the sealing plate. The lower header of the burner water-cooled wall, the lower header of the rear water-cooled wall of the furnace, and the lower header of the radiation evaporation screen are connected by the sealing plate. The left and right water-cooled walls are fixedly connected to both sides of the burner water-cooled wall and the rear water-cooled wall of the furnace.

3. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: The aforementioned middle and rear superheated steam chamber is a space enclosed by the furnace rear water-cooled wall, the channel rear water-cooled wall, the lower header of the furnace rear water-cooled wall, the upper header of the furnace rear water-cooled wall, the upper header of the channel rear water-cooled wall, the steam superheater inlet header, the steam superheater outlet header, and a sealing plate. The channel rear water-cooled wall is connected to the furnace rear water-cooled wall lower header and the channel rear water-cooled wall upper header respectively. The furnace rear water-cooled wall upper header, the steam superheater inlet header, the steam superheater outlet header, and the channel rear water-cooled wall upper header are fixedly connected by the sealing plate. The left and right side water-cooled walls are fixedly connected to both sides of the furnace rear water-cooled wall and the channel rear water-cooled wall.

4. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: The rear evaporation heating surface may be provided with two or more sets of spiral fin convection tube bundles, and the two ends of the spiral fin convection tube bundles are respectively connected to the header on the rear evaporation heating surface and the lower header on the rear evaporation heating surface.

5. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: The two ends of the radiation evaporation screen are respectively connected to the upper header and the lower header of the radiation evaporation screen, and one end of the downcomer is connected to the lower header of the radiation evaporation screen, and the other end is connected to the boiler drum.

6. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: One end of the steam superheater is connected to the inlet header of the steam superheater, and the other end is connected to the outlet header of the steam superheater. The inlet header of the steam superheater is connected to a saturated steam inlet pipe, and the outlet header of the steam superheater is connected to a superheated steam outlet pipe.

7. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: The boiler drum is connected to several gas collecting pipes. Several connecting pipes II connect the upper headers of the left and right water-cooled walls to the gas collecting pipes. The upper headers of the combustion water-cooled surface, the upper headers of the radiation evaporation screen, the upper headers of the furnace rear water-cooled wall, the upper headers of the channel rear water-cooled wall, and the upper headers of the rear evaporation heating surface are connected to the gas collecting pipes and the upper headers of the left and right water-cooled walls respectively through connecting pipes I and IV. The lower headers of the combustion water-cooled surface, the lower headers of the furnace rear water-cooled wall, and the lower headers of the rear evaporation heating surface are connected to the lower headers of the left and right water-cooled walls respectively through connecting pipes III. The lower header of the radiation evaporation screen is connected to the boiler drum through a downcomer.

8. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: The flue gas outlet is located at the rear of the rear evaporation heating surface.

9. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 1, characterized in that: The burner is a water-cooled premixed stable combustion burner or a direct-fired burner.

10. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 3, characterized in that: The furnace rear water-cooled wall and the channel rear water-cooled wall are bare tube water-cooled walls. The flue gas directly enters the middle and rear superheated steam chamber through the gap between the bare tubes of the furnace rear water-cooled wall and conducts convective heat exchange with the steam superheater. Then, it enters the rear evaporation heating surface through the gap between the bare tubes of the channel rear water-cooled wall and is discharged from the flue gas outlet.

11. A hydrogen-fired gas-fired boiler with an integrated steam superheater and direct-flow compartment angle tubes according to claim 3, characterized in that: The aforementioned middle and rear superheated steam chamber provides space for the steam superheater, thereby increasing the heat exchange area and allowing its temperature to reach the SNCR reaction temperature. This enables in-furnace denitrification, reduces the generation of nitrogen oxides, and improves boiler efficiency.

Images