Hydrogen combustion boiler
By setting gas replacement pipes in hydrogen boilers, increasing fireproofer, and design steam bags, the problem of poor replacement effects, fast combustion speed before and after the stove of the hydrogen boiler, the problem of low burning speed and the low efficiency of steam output. More safer and efficiently.
Patent Information
- Application Number
- CN202421084525.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The existing hydrogen boilers have poor replacement effect before and after ignition and shutdown. The hydrogen combustion speed is fast and easy to temper, which affects safe operation and has low steam output efficiency.
A kind of gas replacement tube included at the bottom of the furnace body is designed, and multiple nozzles are installed on the gas replacement tube; the fire blocking machine is added to the hydrogen pipe; Connect the conveyor pump to improve the efficiency of steam output.
Through the design of the gas replacement tube, the dead angle replacement of the furnace body is achieved to ensure safety; the fireproofer effectively avoids the ignition; the design of the steam bag improves the efficiency of steam output.
Smart Images
Figure CN222417382U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of boilers, and in particular relates to a hydrogen-burning boiler. Background Art
[0002] As a clean energy, hydrogen is widely used in some industrial and mining enterprises. With the increasingly stringent national energy conservation and emission reduction requirements, it is a trend to fully recycle hydrogen. At present, burning hydrogen as a fuel in a boiler to generate steam is an effective way to recycle and utilize it, but the existing hydrogen boilers have the following problems: 1. Since the explosion limit range of hydrogen is very large, it will explode within the range of 4% to 76% at 20°C. Before ignition and after shutdown, the inside of the furnace needs to be thoroughly replaced, but the current replacement effect is poor; 2. Hydrogen burns quickly and is easy to backfire, affecting the safe operation of the entire production system; 3. The boiler and steam drum are generally split, and the steam output efficiency is low. Utility Model Content
[0003] In view of the shortcomings of the prior art, the inventor developed a hydrogen-fired boiler based on his own practical experience.
[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a hydrogen-fired boiler, comprising a furnace body, a combustion head is provided at the middle and lower part of the left side of the furnace body, a second hydrogen pipe is connected to the left side of the combustion head, the left end of the second hydrogen pipe is connected to a hydrogen buffer tank, a first hydrogen pipe is connected to the middle and upper part of the left side of the hydrogen buffer tank, the other end of the first hydrogen pipe is connected to the middle and lower part of the right side of the hydrogen tank, a steam drum is provided at the top of the furnace body, a steam outlet pipe is connected to the top of the steam drum, a water outlet pipe is connected to the middle part of the right side of the steam drum, a delivery pump is connected to the inlet of the delivery pump, an exhaust gas outlet pipe is connected to the middle and upper part of the right side of the furnace body, the other end of the exhaust gas outlet pipe is connected to a negative pressure fan, a gas replacement pipe is provided at the bottom of the furnace body, and the other end of the gas replacement pipe is connected to a compressed air tank.
[0005] Furthermore, a first automatic valve is installed on the first hydrogen pipe, a second automatic valve and a flame arrester are installed on the second hydrogen pipe, flanges are provided at both ends of the flame arrester, the flame arrester is connected to the second hydrogen pipe through the flange, the flame arrester is located on the right side of the second automatic valve, and a vent pipe is also connected to the second hydrogen pipe, a vent valve is installed on the vent pipe, and the connection between the vent pipe and the second hydrogen pipe is located on the left side of the second automatic valve.
[0006] Furthermore, the gas replacement pipe located in the furnace body is arranged horizontally, a nozzle is installed on the gas replacement pipe, a thread is arranged at the bottom of the nozzle, the nozzle is connected to the gas replacement pipe through the thread, and a fourth automatic control valve is also installed at one end of the gas replacement pipe close to the compressed air tank.
[0007] Furthermore, a third automatic control valve for controlling the steam output volume is installed on the steam outlet pipe.
[0008] Furthermore, a fan air inlet valve is installed on the exhaust gas outlet pipe, the outlet of the negative pressure fan is connected to the exhaust gas outlet pipe, and an air outlet valve is installed on the exhaust gas outlet pipe.
[0009] Furthermore, a water tank is installed on the right side of the delivery pump, and the delivery pump is connected to the water tank through a water inlet pipe. A water inlet valve is arranged on the water inlet pipe, and a water outlet valve is arranged on the water outlet pipe.
[0010] Compared with the prior art, the utility model has the following beneficial effects:
[0011] 1. The inventor has arranged a gas replacement pipe at the bottom of the existing boiler, and the gas replacement pipe is arranged horizontally. A plurality of nozzles are installed on the gas replacement pipe. Before the furnace is started or after the furnace is stopped, the fourth automatic control valve and the negative pressure fan are opened, and compressed air enters the furnace body through the gas replacement pipe, which can effectively replace the furnace body without dead angles and ensure the safety of the furnace body.
[0012] Adding a flame arrester to the second hydrogen pipe can effectively avoid the occurrence of flashback.
[0013] A steam bag is added to the top of the existing furnace body and integrated with the furnace body. The steam bag is connected to a delivery pump and can continuously produce steam, thereby improving the steam production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model.
[0015] Figure 2 Schematic diagram of the gas displacement tube and nozzle.
[0016] Figure 3 Schematic diagram of the flame arrester.
[0017] Figure numerals: 1, furnace body, 2, steam drum, 3, steam outlet pipe, 4, third automatic valve, 5, hydrogen tank, 6, first hydrogen pipe, 7, first automatic valve, 8, hydrogen buffer tank, 9, second hydrogen pipe, 10, second automatic valve, 11, flame arrester, 1101, flange, 12, combustion head, 13, vent pipe, 14, vent valve, 15, water tank, 16, water inlet pipe, 17, water inlet valve, 18, delivery pump, 19, water outlet pipe, 20, water outlet valve, 21, fan inlet pipe, 22, air inlet valve, 23, negative pressure fan, 24, exhaust gas outlet pipe, 25, air outlet valve, 26, compressed air tank, 27, gas replacement pipe, 28, fourth automatic valve, 29, nozzle, 2901, thread. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0019] like Figure 1 — Figure 3 As shown, a hydrogen-fired boiler comprises a furnace body 1, a combustion head 12 is provided at the middle and lower part of the left side of the furnace body 1, a second hydrogen pipe 9 is connected to the left side of the combustion head 12, a hydrogen buffer tank 8 is connected to the left end of the second hydrogen pipe 9, a first hydrogen pipe 6 is connected to the middle and upper part of the left side of the hydrogen buffer tank 8, the other end of the first hydrogen pipe 6 is connected to the middle and lower part of the right side of the hydrogen tank 5, a steam drum 2 is provided on the top of the furnace body 1, a steam outlet pipe 3 is connected to the top of the steam drum 2, a water outlet pipe 19 is connected to the middle part of the right side of the steam drum 2, a delivery pump 18 is connected to the other end of the water outlet pipe 19, a water inlet pipe 16 is connected to the inlet of the delivery pump 18, an exhaust gas outlet pipe 21 is connected to the middle and upper part of the right side of the furnace body 1, a negative pressure fan 23 is connected to the other end of the exhaust gas outlet pipe 21, a gas replacement pipe 27 is provided at the bottom of the furnace body 1, and the other end of the gas replacement pipe 27 is connected to a compressed air tank 26.
[0020] In this embodiment, a first automatic valve 7 is installed on the first hydrogen pipe 6, and a second automatic valve 10 and a flame arrester 11 are installed on the second hydrogen pipe 9. Flanges 1101 are provided at both ends of the flame arrester 11. The flame arrester 11 is connected to the second hydrogen pipe 9 through the flange 1101. The flame arrester 11 is located on the right side of the second automatic valve 10. A vent pipe 13 is also connected to the second hydrogen pipe 9. A vent valve 14 is installed on the vent pipe 13. The connection between the vent pipe 13 and the second hydrogen pipe 9 is located on the left side of the second automatic valve 10.
[0021] In this embodiment, the gas replacement pipe 27 located in the furnace body 1 is horizontally arranged, and a nozzle 29 is installed on the gas replacement pipe 27. A thread 2901 is provided at the bottom of the nozzle 29. The nozzle 29 is connected to the gas replacement pipe 27 through the thread 2901. A fourth automatic control valve 28 is also installed at one end of the gas replacement pipe 27 close to the compressed air tank 26.
[0022] In this embodiment, a third automatic control valve 4 for controlling the steam outlet volume is installed on the steam outlet pipe 3 .
[0023] In this embodiment, an air inlet valve 22 is installed on the exhaust gas inlet pipe 21, the outlet of the negative pressure blower is connected to the exhaust gas outlet pipe 24, and an air outlet valve 25 is installed on the exhaust gas outlet pipe.
[0024] In this embodiment, a water tank 15 is installed on the right side of the delivery pump 18 , and the delivery pump 18 is connected to the water tank 15 via a water inlet pipe 16 . A water inlet valve 17 is provided on the water inlet pipe 16 , and a water outlet valve 20 is provided on the water outlet pipe 19 . Example
[0025] Before lighting the furnace, first open the negative pressure fan 23 and the fourth automatic control valve 28, and the compressed air enters the furnace body 1 through the gas replacement pipe 27 for replacement. The replacement time is 20 minutes. Notify the analyst to sample and analyze the gas inside the furnace body 1. Only after the indicators are qualified can the furnace lighting operation be carried out.
[0026] When lighting the furnace, close the fourth automatic control valve 28, reduce the suction force of the negative pressure fan 23, make the interior of the furnace body 1 in a slightly negative pressure state, and then light the furnace. The flame burns in the combustion head 12. After the flame burns, hydrogen enters the hydrogen buffer tube 8 through the first hydrogen pipe 6. After the pressure buffering of the hydrogen buffer tank 8, hydrogen burns continuously in the combustion head 12. The operator must ensure that the liquid level of the steam drum 2 is not less than 30%. The gas replacement pipe 27 and the nozzle 29 are made of high-temperature resistant materials. These high-temperature resistant materials can be made of graphite, silicon carbide, ceramics, etc. There is no need to worry about damage to them by the hydrogen flame during normal production. During maintenance, if the nozzle 29 is found to be blocked or damaged, it must be replaced in time.
[0027] After the furnace is shut down, the first automatic control valve 7 and the second automatic control valve 10 are first closed, and then the negative pressure fan 23 and the fourth automatic control valve 28 are opened, and the compressed air enters the furnace body 1 through the gas replacement pipe 27 for replacement. The replacement time is 20 minutes, and the analyst is notified to sample and analyze the gas inside the furnace body 1. Only when the index is qualified can the shutdown operation be considered completed. If the sampling analysis result is unqualified, the furnace body 1 will continue to be replaced until the analysis sample is qualified. Example
[0028] During normal production, qualified water enters the steam drum 2 through the water inlet pipe 16 and the water outlet pipe 19 in sequence, and the generated steam is transported to the next process through the steam outlet pipe 3. The delivery pump 18 is in normal operation. If the delivery pump 18 fails and cannot be restored to normal in a short time, the furnace must be shut down to avoid the steam drum 2 from drying out. Example
[0029] When the temperature is low in winter, a small amount of water will remain in the hydrogen pipeline. Each team must open the relief valve 14 on the relief pipe 13 at least once to drain the water.
[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0031] Although three embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and combinations may be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A hydrogen-fired boiler, characterized in that: It includes a furnace body, a combustion head is provided at the lower middle part of the left side of the furnace body, a second hydrogen pipe is connected to the left side of the combustion head, a hydrogen buffer tank is connected to the first hydrogen pipe at the upper middle part of the left side of the hydrogen buffer tank, the other end of the first hydrogen pipe is connected to the lower middle part of the right side of the hydrogen tank, a steam drum is provided at the top of the furnace body, a steam outlet pipe is connected to the top of the steam drum, a water outlet pipe is connected to the middle part of the right side of the steam drum, a delivery pump is connected to the other end of the water outlet pipe, and a water inlet pipe is connected to the inlet of the delivery pump, an exhaust gas outlet pipe is connected to the upper middle part of the right side of the furnace body, a negative pressure fan is connected to the other end of the exhaust gas outlet pipe, a gas replacement pipe is provided at the bottom of the furnace body, and the other end of the gas replacement pipe is connected to a compressed air tank.
2. A hydrogen-fired boiler according to claim 1, characterized in that: A first automatic valve is installed on the first hydrogen pipe, a second automatic valve and a flame arrester are installed on the second hydrogen pipe, flanges are provided at both ends of the flame arrester, the flame arrester is connected to the second hydrogen pipe through the flange, the flame arrester is located on the right side of the second automatic valve, a vent pipe is also connected to the second hydrogen pipe, a vent valve is installed on the vent pipe, and the connection between the vent pipe and the second hydrogen pipe is located on the left side of the second automatic valve.
3. A hydrogen-fired boiler according to claim 1, characterized in that: The gas replacement pipe located in the furnace body is arranged horizontally, a nozzle is installed on the gas replacement pipe, a thread is arranged at the bottom of the nozzle, the nozzle is connected to the gas replacement pipe through the thread, and a fourth automatic control valve is also installed at one end of the gas replacement pipe close to the compressed air tank.
4. A hydrogen-fired boiler according to claim 1, characterized in that: The steam outlet pipe is provided with a third automatic control valve for controlling the steam outlet volume.
5. A hydrogen-fired boiler according to claim 1, characterized in that: The exhaust gas outlet pipe is provided with a fan air inlet valve, the outlet of the negative pressure fan is connected with the exhaust gas outlet pipe, and the exhaust gas outlet pipe is provided with an air outlet valve.
6. A hydrogen-fired boiler according to claim 1, characterized in that: A water tank is installed on the right side of the delivery pump. The delivery pump is connected to the water tank through a water inlet pipe. A water inlet valve is arranged on the water inlet pipe, and a water outlet valve is arranged on the water outlet pipe.