Hydrogen production device of waste heat steam boiler

Abstract

The invention belongs to the technical field of waste heat boilers, and particularly relates to a waste heat steam boiler hydrogen production device which comprises a furnace body, an evaporation pipe set is arranged in the furnace body, a smoke inlet pipe is further included, a smoke inlet is fixed to the top end of the outer side face of the smoke inlet pipe, and a smoke outlet is fixed to the bottom end of the outer side face of the smoke inlet pipe; a smoke guide opening is fixed to the bottom end of the outer side face of the smoke outlet pipe, a smoke outlet is fixed to the top end of the outer side face of the smoke outlet pipe, and the smoke guide opening is connected with the smoke outlet connector; the multiple spoilers are symmetrically fixed to the inner wall of the furnace body in a staggered mode, and the internal space of the furnace body is partitioned into an S-shaped flue through the spoilers; according to the invention, the internal space of the furnace body is blocked into the S-shaped flue by the spoilers, so that the flue gas circulation path is prolonged, the heat exchange time is prolonged, heat in high-temperature flue gas and converted gas is ensured to be fully exchanged with the evaporation pipe group, devices such as an evaporator, a plate heat exchanger and the like do not need to be additionally arranged, and the cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat boilers, and in particular relates to a reformer waste heat boiler, and specifically relates to a waste heat steam boiler hydrogen production device. Background Art

[0002] During the hydrogen production process, the high-temperature flue gas and conversion gas discharged from the reformer carry a large amount of waste heat. In order to make full use of this thermal energy and reduce the energy consumption of the hydrogen production system, a waste heat boiler is usually installed. The waste heat boiler is used to cool the high-temperature flue gas and conversion gas and heat water into water vapor. The generated water vapor can be further introduced into the steam reformer as a supplementary heat source to provide heat source and reaction medium for the conversion reaction.

[0003] The reformer waste heat boiler is very common in the hydrogen production system. In the prior art, the tubular waste heat boiler is more common. Water is passed into the evaporation tube group to exchange heat with the high-temperature flue gas and reforming gas. The water is heated and becomes water vapor and discharged.

[0004] In actual use, it was found that although the waste heat boilers of the existing technology can meet general usage needs, their heat exchange efficiency is low and it is difficult to fully convert the waste heat in the high-temperature flue gas and the conversion gas. Although some waste heat boilers improve the efficiency of waste heat utilization by adding evaporators, plate heat exchangers and other devices at the exhaust port, the cost is high and it also greatly increases the difficulty of maintaining the hydrogen production equipment.

[0005] In order to solve the above problems, a waste heat steam boiler hydrogen production device is proposed in the present application. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides a waste heat steam boiler hydrogen production device, which has the characteristics of easy use and high waste heat utilization efficiency.

[0007] To achieve the above object, the present invention provides the following technical solution: a waste heat steam boiler hydrogen production device, comprising a furnace body, a smoke inlet interface and a smoke outlet interface are respectively fixed at both ends of the furnace body, an evaporation tube group is arranged in the furnace body, a shunt pipe and a confluence pipe are respectively fixed at both ends of the top surface of the furnace body, one end of the evaporation tube group is connected to the shunt pipe, and the other end is connected to the confluence pipe, and a water inlet is fixed on the shunt pipe, and a water vapor outlet is fixed on the confluence pipe, and further comprising:

[0008] A smoke inlet pipe, wherein a smoke inlet port is fixed at the top of the outer side surface of the smoke inlet pipe, a smoke exhaust port is fixed at the bottom of the outer side surface, and the smoke exhaust port is connected to the smoke inlet interface;

[0009] A smoke outlet pipe, wherein a smoke guide port is fixed at the bottom end of the outer side surface of the smoke outlet pipe, a smoke outlet is fixed at the top end, and the smoke guide port is connected to the smoke outlet interface;

[0010] A spoiler, wherein a plurality of the spoilers are staggered and symmetrically fixed to the inner wall of the furnace body, and the spoiler blocks the inner space of the furnace body into an "S"-shaped flue.

[0011] As a preferred technical solution of the present invention, the evaporation tube group includes a plurality of “S”-shaped evaporation tubes distributed at equal intervals, and the “S”-shaped evaporation tubes are arranged in a vertical direction.

[0012] As a preferred technical solution of the present invention, the smoke exhaust port is connected to the smoke inlet interface by means of a flange.

[0013] As a preferred technical solution of the present invention, the smoke guide port is connected to the smoke outlet interface by means of a flange.

[0014] As a preferred technical solution of the present invention, it also includes:

[0015] The porous filter plate is a "human" shaped component, the porous filter plate is fixed in the smoke inlet pipe, and the porous filter plate is located on the inner side of the smoke inlet and the smoke exhaust port.

[0016] As a preferred technical solution of the present invention, it also includes:

[0017] A sealing door, wherein a cleaning port is machined on the smoke inlet pipe at a position corresponding to the porous filter plate, the sealing door is hinged to the outer wall of the smoke inlet pipe at a position corresponding to the cleaning port, and a locking block is fixed at the free end of the sealing door, and a notch is provided on the locking block;

[0018] The locking mechanism comprises a locking screw and a butterfly nut, wherein the locking screw is hinged on the smoke inlet pipe and passes through the notch, and the butterfly nut is installed on the protruding end of the locking screw by threaded engagement.

[0019] As a preferred technical solution of the present invention, it also includes:

[0020] A silicone sealing ring is bonded and fixed to a side of the sealing door facing the smoke inlet pipe.

[0021] As a preferred technical solution of the present invention, it also includes:

[0022] A transparent observation window is embedded and installed on the sealed door.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the present invention, the spoiler is arranged to block the internal space of the furnace body into an "S"-shaped flue, thereby extending the flue gas flow path, thereby extending the heat exchange time, ensuring that the heat in the high-temperature flue gas and the converted gas is fully heat exchanged with the evaporation tube group, so there is no need to add evaporators, plate heat exchangers and other devices, thereby reducing costs.

[0025] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0029] Figure 3 Schematic diagram of the cross-sectional structure of the spoiler in the present invention;

[0030] Figure 4 This is a schematic diagram of the axonometric structure of the smoke inlet pipe in the present invention;

[0031] Figure 5 For the present invention Figure 1 A in the figure is an enlarged structural diagram.

[0032] In the figure: 1. furnace body; 11. smoke inlet interface; 12. smoke outlet interface; 2. diverter pipe; 21. water inlet; 3. confluence pipe; 31. water vapor outlet; 4. smoke inlet pipe; 41. smoke inlet; 42. smoke exhaust port; 43. cleaning port; 5. smoke outlet pipe; 51. smoke guide port; 52. smoke outlet; 6. evaporation tube group; 7. spoiler; 71. flue; 8. porous filter plate; 9. sealing door; 91. locking block; 911. notch; 92. silicone sealing ring; 93. transparent observation window; 10. locking mechanism; 101. locking screw; 102. butterfly nut. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 5 The present invention provides the following technical solutions: a waste heat steam boiler hydrogen production device, including a furnace body 1, a smoke inlet interface 11 and a smoke outlet interface 12 are respectively fixed at both ends of the furnace body 1, an evaporation tube group 6 is arranged in the furnace body 1, a diverter pipe 2 and a converging pipe 3 are respectively fixed at both ends of the top surface of the furnace body 1, one end of the evaporation tube group 6 is connected to the diverter pipe 2, and the other end is connected to the converging pipe 3, and a water inlet 21 is fixed on the diverter pipe 2, and a water vapor outlet 31 is fixed on the converging pipe 3, and also includes: a smoke inlet pipe 4, a smoke outlet pipe 5 and a spoiler 7.

[0035] Further, by Figure 1-Figure 3 As shown, in the present embodiment, a smoke inlet 41 is fixed at the top of the outer side surface of the smoke inlet pipe 4, a smoke exhaust port 42 is fixed at the bottom of the outer side surface, and the smoke exhaust port 42 is connected to the smoke inlet interface 11, a smoke guide port 51 is fixed at the bottom of the outer side surface of the smoke outlet pipe 5, a smoke outlet 52 is fixed at the top, and the smoke guide port 51 is connected to the smoke outlet interface 12, and a plurality of spoilers 7 are staggered and symmetrically fixed to the inner wall of the furnace body 1, and the spoiler 7 blocks the internal space of the furnace body 1 into an "S"-shaped flue 71. After adopting the above scheme, when in use, the high-temperature flue gas and the conversion gas of the steam reformer are passed into the smoke inlet 41, and the high-temperature flue gas and the conversion gas pass through the smoke inlet pipe 4, the smoke exhaust port 42 and the smoke inlet interface 11 into the furnace Water is injected into the body 1 from the water inlet 21, and the water enters the evaporation tube group 6. The heat in the high-temperature flue gas and the conversion gas exchanges heat with the water, so that the water is heated to become water vapor and is discharged from the water vapor outlet 31. The discharged water vapor can be further introduced into the steam reformer as a supplementary heat source to provide a heat source and a reaction medium for the conversion reaction. The spoiler 7 provided in the present invention blocks the internal space of the furnace body 1 into an "S"-shaped flue 71, thereby extending the flue gas flow path, thereby extending the heat exchange time, and ensuring that the heat in the high-temperature flue gas and the conversion gas is fully heat exchanged with the evaporation tube group 6. Therefore, there is no need to add an evaporator, a plate heat exchanger and other devices, thereby reducing the cost.

[0036] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the evaporator tube group 6 includes a plurality of "S"-shaped evaporator tubes that are evenly spaced, and the "S"-shaped evaporator tubes are arranged in a vertical direction. After adopting the above design, the "S"-shaped evaporator tubes have a large heat exchange area, which can fully exchange heat with the heat in the high-temperature flue gas and the conversion gas, and the waste heat utilization rate is high.

[0037] It should be noted that the "S"-shaped evaporation tube of the present invention is arranged in a vertical direction. As a preferred implementation scheme, this design can effectively avoid water vapor stratification and the deposition of pollutants. It is worth noting that the preferred solution is not the only solution and is not used to limit the present invention. If the problems of water vapor stratification and pollutant deposition are not considered, the evaporation tube can also adopt other arrangements, such as horizontal arrangement, inclined arrangement, etc.

[0038] Optionally, by Figure 1 As shown, in this embodiment, the smoke exhaust port 42 is connected to the smoke inlet interface 11 by means of a flange, which is convenient for connection and also convenient for separation and maintenance of the smoke inlet pipe 4 and the furnace body 1 .

[0039] It should be noted that the above scheme is only a preferred implementation scheme of the present invention and is not intended to limit the present invention. In other available embodiments, the smoke exhaust port 42 and the smoke inlet interface 11 can also be connected by other conventional means, such as welding, rivet connection, etc.

[0040] Optionally, by Figure 1 As shown, in this embodiment, the smoke guide port 51 is connected to the smoke outlet interface 12 by a flange, which is convenient for connection and also convenient for separation and maintenance of the smoke outlet pipe 5 and the furnace body 1 .

[0041] It should be noted that the above scheme is only a preferred implementation scheme of the present invention and is not intended to limit the present invention. In other applicable embodiments, the smoke guide port 51 and the smoke outlet interface 12 may also be connected by other conventional means, such as welding, rivet connection, etc.

[0042] Preferably, by Figure 1 and Figure 4 As shown, in this embodiment, it also includes: a porous filter plate 8, the porous filter plate 8 is a "human" shaped component, the porous filter plate 8 is fixed in the smoke inlet pipe 4, and the porous filter plate 8 is located on the inner side of the smoke inlet 41 and the smoke exhaust port 42. After adopting the above scheme, through the porous filter plate 8, the impurities in the high-temperature flue gas and the converted gas will be blocked by the porous filter plate 8, thereby preventing the impurities from entering the furnace body 1, ensuring the safety of the furnace body 1 and the internal evaporation tube group 6.

[0043] It should be noted that the present invention also specially designs the porous filter plate 8 as a "human" shaped component. The middle part of the porous filter plate 8 is protruding, which on the one hand increases the filtration area, and on the other hand makes it difficult for impurities to cause clogging to the porous filter plate 8. Most impurities will accumulate on both sides of the porous filter plate 8, which is also more convenient to clean.

[0044] Preferably, by Figure 1 , Figure 4 and Figure 5As shown, in this embodiment, it also includes: a sealing door 9 and a locking mechanism 10. A cleaning port 43 is processed on the smoke inlet pipe 4 at a position corresponding to the porous filter plate 8. The sealing door 9 is hinged to the outer wall of the smoke inlet pipe 4 at a position corresponding to the cleaning port 43, and a locking block 91 is fixed to the free end of the sealing door 9. The locking block 91 has a notch 911. The locking mechanism 10 includes a locking screw 101 and a butterfly nut 102. The locking screw 101 is hinged on the smoke inlet pipe 4, and the locking screw 101 passes through the notch 911. The butterfly nut 102 is installed on the protruding end of the locking screw 101 by threaded engagement. Therefore, after adopting the above scheme, during the working process, the sealing door 9 is closed, the locking screw 101 is rotated to make the locking screw 101 pass through the notch 911, and then the butterfly nut 102 is tightened on the protruding end of the locking screw 101 to lock the sealing door 9 to ensure the stability of the sealing door 9 after closing.

[0045] When the sealing door 9 needs to be opened, first loosen the butterfly nut 102, then rotate the locking screw 101 to separate the locking screw 101 and the butterfly nut 102 from the locking block 91, and then the sealing door 9 can be opened to facilitate cleaning of impurities on the porous filter plate 8.

[0046] Preferably, by Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, it also includes: a silicone sealing ring 92, which is bonded and fixed to the side of the sealing door 9 facing the smoke inlet pipe 4. After adopting the above scheme, through the setting of the silicone sealing ring 92, when the sealing door 9 is closed, the silicone sealing ring 92 shrinks, thereby improving the sealing performance of the sealing door 9 after closing.

[0047] It should be noted that the present invention uses a silicone sealing ring 92 because the silicone sealing ring 92 has excellent high temperature resistance and toughness, but this is not used to limit the present invention, and other materials with high temperature resistance may also be used as sealing materials.

[0048] Preferably, by Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, it also includes: a transparent observation window 93, which is embedded in the sealing door 9. After adopting the above scheme, the porous filter plate 8 can be visually seen through the transparent observation window 93, so as to grasp the accumulation of impurities on the porous filter plate 8 and facilitate the timely cleaning of the porous filter plate 8.

[0049] Components not described in detail herein are prior art.

[0050] Working principle and use process of the present invention: When the waste heat steam boiler hydrogen production device of the present invention is in use, the high-temperature flue gas and conversion gas of the steam reformer (not shown in the figure) are introduced into the smoke inlet 41, and the high-temperature flue gas and conversion gas pass through the smoke inlet pipe 4, the smoke exhaust port 42 and the smoke inlet interface 11 to enter the furnace body 1, and water is injected from the water inlet 21, and the water enters the evaporation tube group 6. The heat in the high-temperature flue gas and conversion gas exchanges heat with the water, so that the water is heated to become water vapor and is discharged from the water vapor outlet 31. The discharged water vapor can be further introduced into the steam reformer as a supplementary heat source to provide a heat source and a reaction medium for the conversion reaction. For example, in the process of preparing industrial hydrogen using methane CH4 as a raw material, CH4 is reformed and converted in the reformer, and CH4 and H2O react at high temperature to generate CO2 and H2. The reaction equation is:

[0051] CH4(g)+2H2O(g)==CO2(g)+4H2 ΔH=+165KJ·mol -1 ;

[0052] The present invention provides a spoiler 7, which blocks the internal space of the furnace body 1 into an "S"-shaped flue 71, thereby extending the flue gas flow path, thereby extending the heat exchange time, ensuring that the heat in the high-temperature flue gas and the converted gas is fully heat-exchanged with the evaporation tube group 6, so there is no need to add an evaporator, a plate heat exchanger and other devices, thereby reducing the cost;

[0053] The present invention also provides a porous filter plate 8, through which impurities in the high-temperature flue gas and the conversion gas are blocked by the porous filter plate 8, thereby preventing the impurities from entering the furnace body 1, thereby ensuring the safety of the furnace body 1 and the internal evaporation tube group 6;

[0054] In addition, the porous filter plate 8 is designed as a "human" shaped component, which increases the filtering area on the one hand, and makes it difficult for impurities to cause clogging to the porous filter plate 8 on the other hand. Most impurities will accumulate on both sides of the porous filter plate 8, which is also convenient to clean.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waste heat steam boiler hydrogen production device, comprising a furnace body (1), a smoke inlet interface (11) and a smoke outlet interface (12) are respectively fixed at both ends of the furnace body (1), an evaporation tube group (6) is arranged in the furnace body (1), a branch pipe (2) and a converging pipe (3) are respectively fixed at both ends of the top surface of the furnace body (1), one end of the evaporation tube group (6) is connected to the branch pipe (2), and the other end is connected to the converging pipe (3), and a water inlet (21) is fixed on the branch pipe (2), and a water vapor outlet (31) is fixed on the converging pipe (3), characterized in that: Also includes: A smoke inlet pipe (4), wherein a smoke inlet port (41) is fixed at the top end of the outer side surface of the smoke inlet pipe (4), and a smoke exhaust port (42) is fixed at the bottom end of the outer side surface, and the smoke exhaust port (42) is connected to the smoke inlet interface (11); A smoke outlet pipe (5), wherein a smoke guide port (51) is fixed at the bottom end of the outer side surface of the smoke outlet pipe (5), and a smoke outlet port (52) is fixed at the top end, and the smoke guide port (51) is connected to the smoke outlet interface (12); A spoiler (7), wherein a plurality of the spoilers (7) are fixed to the inner wall of the furnace body (1) in a staggered and symmetrical manner, and the spoiler (7) blocks the inner space of the furnace body (1) into an "S"-shaped flue (71).

2. A waste heat steam boiler hydrogen production device according to claim 1, characterized in that: The evaporation tube group (6) comprises a plurality of "S"-shaped evaporation tubes that are evenly spaced, and the "S"-shaped evaporation tubes are arranged in a vertical direction.

3. A waste heat steam boiler hydrogen production device according to claim 1, characterized in that: The smoke exhaust port (42) is connected to the smoke inlet port (11) by means of a flange.

4. A waste heat steam boiler hydrogen production device according to claim 1, characterized in that: The smoke guide port (51) is connected to the smoke outlet interface (12) by means of a flange.

5. The waste heat steam boiler hydrogen production device according to claim 1, characterized in that: Also includes: A porous filter plate (8), the porous filter plate (8) being a "human" shaped component, the porous filter plate (8) being fixed in the smoke inlet pipe (4), and the porous filter plate (8) being located on the inner side of the smoke inlet port (41) and the smoke exhaust port (42).

6. A waste heat steam boiler hydrogen production device according to claim 5, characterized in that: Also includes: A sealing door (9) is provided with a cleaning port (43) at a position on the smoke inlet pipe (4) corresponding to the porous filter plate (8), the sealing door (9) is hinged to the outer wall of the smoke inlet pipe (4) at a position corresponding to the cleaning port (43), and a locking block (91) is fixed to the free end of the sealing door (9), and a notch (911) is provided on the locking block (91); A locking mechanism (10), the locking mechanism (10) comprising a locking screw (101) and a butterfly nut (102), the locking screw (101) being hinged on the smoke inlet pipe (4), and the locking screw (101) passing through the notch (911), and the butterfly nut (102) being mounted on the protruding end of the locking screw (101) by means of a threaded engagement.

7. A waste heat steam boiler hydrogen production device according to claim 6, characterized in that: Also includes: A silicone sealing ring (92), wherein the silicone sealing ring (92) is bonded and fixed to a side of the sealing door (9) facing the smoke inlet pipe (4).

8. A waste heat steam boiler hydrogen production device according to claim 6, characterized in that: Also includes: A transparent observation window (93), wherein the transparent observation window (93) is embedded and installed on the sealing door (9).

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