CN115899726A - Hydrogen ignition device of hydrogen combustion pool and hydrogen combustion system - Google Patents
Hydrogen ignition device of hydrogen combustion pool and hydrogen combustion system Download PDFInfo
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- CN115899726A CN115899726A CN202310098520.XA CN202310098520A CN115899726A CN 115899726 A CN115899726 A CN 115899726A CN 202310098520 A CN202310098520 A CN 202310098520A CN 115899726 A CN115899726 A CN 115899726A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 169
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 169
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 164
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 155
- 239000000446 fuel Substances 0.000 claims abstract description 75
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 100
- 239000007789 gas Substances 0.000 claims description 17
- 238000004200 deflagration Methods 0.000 abstract description 8
- 238000010304 firing Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000005474 detonation Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003915 liquefied petroleum gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The embodiment of the invention relates to a hydrogen ignition device of a hydrogen combustion pool and a hydrogen combustion system. The hydrogen ignition device is applied to a hydrogen combustion system of a hydrogen combustion pool, and the combustion system comprises the combustion pool, a plurality of bubble caps and a hydrogen discharge pipeline; the hydrogen ignition device comprises a fuel main pipe and a plurality of fuel branch pipes, one end of the fuel main pipe is connected with the fuel supply device, the other end of the fuel main pipe is respectively connected with the inlet end of each fuel branch pipe, the inlet end of each fuel branch pipe is provided with an electric ignition needle, the outlet end of each fuel branch pipe is provided with a plurality of flame nozzles, each flame nozzle is positioned above the combustion pool, and the distance between each flame nozzle and the corresponding bubble cap is smaller than the preset distance; wherein each electric firing needle is used for igniting fuel in the fuel branch pipe corresponding to the electric firing needle, and flame formed by fuel combustion is sprayed out of a flame nozzle of the corresponding fuel branch pipe so as to be used for combusting hydrogen overflowing from the corresponding bubble cap. The device can ignite the hydrogen overflowing from any area of the combustion pool in time, and the deflagration risk is low.
Description
Technical Field
The embodiment of the invention relates to the technical field of gas treatment, in particular to a hydrogen ignition device of a hydrogen combustion pool and a hydrogen combustion system.
Background
In recent years, hydrogen energy sources are widely applied to the field of aerospace, such as carrier rocket precooling and liquid hydrogen filling. However, during the precooling and filling processes, a large amount of low-temperature hydrogen is evaporated from the rocket storage tank, the filling pipeline and the liquid hydrogen storage tank, and if the low-temperature hydrogen is not treated in time, the low-temperature hydrogen and the air are mixed to form hydrogen-oxygen mixture. And the combustible range is wider (the explosion limit of volume concentration is 4.0-75.6%) and the ignition energy is small after the hydrogen and the air are mixed, so the hydrogen and the air are easily ignited by various accidental reasons to cause uncontrollable ignition and cause safety accidents.
In the related art, the combustion system firstly introduces the evaporated hydrogen into a bubble cap of the combustion tank through a pipeline, then the hydrogen overflows from the bubble cap after the pressure in the bubble cap exceeds the water seal pressure, and finally the overflowing hydrogen is ignited by an electric ignition needle arranged on the inner wall of the combustion tank. However, the existing hydrogen ignition device mainly ignites the hydrogen close to the inner wall of the combustion pool first, and then ignites the hydrogen close to the center of the combustion pool in sequence in a flame spreading manner. However, since hydrogen is relatively concentrated in the central region of the burn chamber, a deflagration is likely to occur when a flame spreads to the central region of the burn chamber, causing damage to field devices and workers.
Therefore, there is a need for a hydrogen ignition device and a hydrogen combustion system for a hydrogen combustion tank to solve the above-mentioned problems.
Disclosure of Invention
Based on the above problems, embodiments of the present invention provide a hydrogen ignition device and a hydrogen combustion system for a hydrogen combustion tank, which can ignite hydrogen overflowing from any region of the combustion tank in time, so that hydrogen combustion is stable and deflagration risk is low.
In a first aspect, an embodiment of the present invention provides a hydrogen ignition device for a hydrogen combustion pool, which is applied to a hydrogen combustion system of the hydrogen combustion pool, where the combustion system includes a combustion pool, a plurality of bubble caps and a hydrogen discharge pipeline; wherein the combustion pool contains water, a plurality of bubble caps are uniformly arranged in the combustion pool, the bottom end of each bubble cap is immersed in the water, the hydrogen discharge pipeline is communicated with the bubble caps, and the hydrogen discharge pipeline is used for introducing hydrogen to be combusted into the bubble caps; the hydrogen ignition device includes:
the device comprises a fuel main pipe and a plurality of fuel branch pipes, wherein one end of the fuel main pipe is connected with a fuel supply device, the other end of the fuel main pipe is respectively connected with an inlet end of each fuel branch pipe, the inlet end of each fuel branch pipe is provided with an electric ignition needle, the outlet end of each fuel branch pipe is provided with a plurality of flame nozzles, each flame nozzle is positioned above the combustion pool, and the distance between each flame nozzle and a corresponding bubble cap is smaller than a preset distance; wherein each electric ignition needle is used for igniting the fuel in the corresponding fuel branch pipe, and the flame formed by fuel combustion is sprayed out from the flame nozzle of the corresponding fuel branch pipe so as to be used for combusting the hydrogen overflowed from the corresponding bubble cap.
In one possible design, the inlet end of each fuel branch is provided with a first valve.
In one possible design, a second valve is provided on the fuel main.
In a second aspect, embodiments of the present invention further provide a hydrogen combustion system for a hydrogen combustion pool, including a combustion pool, a plurality of bubble caps, a hydrogen discharge pipeline, and a hydrogen ignition device in any one of the above possible designs; wherein the content of the first and second substances,
water is contained in the combustion tank;
the plurality of bubble caps are uniformly arranged in a preset area of the combustion pool, and the bottom end of each bubble cap is immersed in water;
the hydrogen discharge pipeline comprises a main pipe, two first branch pipes, a plurality of second branch pipes and a plurality of gas risers, wherein the main pipe, the two first branch pipes, the plurality of second branch pipes and the plurality of gas risers are sequentially arranged in the hydrogen flowing direction; the second branch pipes are uniformly distributed in the lower space of the combustion pool, the inlet end of the main pipe is connected with external hydrogen discharge equipment, the outlet end of the main pipe penetrates through the side wall of the combustion pool and then is respectively connected with the inlet end of each first branch pipe, one end of each second branch pipe is respectively and sequentially connected with the outlet end of one first branch pipe along the forward airflow direction, and the other end of each second branch pipe is respectively and sequentially connected with the outlet end of the other first branch pipe along the reverse airflow direction;
the quantity of gas-lift pipes with the quantity of bubble cap is the same, every the exit end of gas-lift pipe respectively with one the bubble cap intercommunication, and every the export of gas-lift pipe all is higher than the surface of water in the combustion pond.
In one possible design, a check valve is provided on the main pipe for preventing external gas from entering the hydrogen gas discharge apparatus.
In a possible design, the arrangement height of each first branch pipe and each second branch pipe is higher than the height of the pipeline at the lowest position of the main pipe, a water discharge pipe is connected to the pipeline at the lowest position of the main pipe, and a water discharge valve is arranged on the water discharge pipe.
In a possible design, an overflow port with a preset height is arranged on the wall of the combustion pool, the preset height is higher than the height of the bottom end of the bubble cap and lower than the outlet height of the riser, and the overflow port is used for being communicated with the outside.
In a possible design, the device further comprises an overflow tank, the overflow tank is communicated with the combustion tank through the overflow port, and water in the combustion tank flows into the overflow tank through the overflow port.
In one possible design, the water replenishing system further comprises a water replenishing pipeline and a water replenishing valve arranged on the water replenishing pipeline;
and a water replenishing port is also arranged on the wall of the combustion pool, one end of the water replenishing pipeline is connected with external water supply equipment, and the other end of the water replenishing pipeline is communicated with the water replenishing port.
In one possible design, each bubble cap is of an inner-outer double-layer structure, and the space of the inner layer is communicated with the space of the outer layer;
the inner layer is communicated with the gas lift pipe, the top end of the outer layer is closed, the bottom end of the outer layer is open, and the bottom end of the outer layer is immersed in water.
The invention provides a hydrogen ignition device of a hydrogen combustion pool and a hydrogen combustion system, wherein the hydrogen ignition device is applied to the hydrogen combustion system, the hydrogen ignition device is provided with a plurality of fuel branch pipes, and each fuel branch pipe is provided with an electric ignition needle and a plurality of flame nozzles. On the other hand, through arranging every flame nozzle in the sky of combustion chamber, and every flame nozzle all is less than preset distance with the distance of corresponding bubble cap, then overflow the back when hydrogen from arbitrary bubble cap, all can be ignited by its flame of flame nozzle spun nearby fast, and then avoid the hydrogen of combustion chamber center department because the burning later takes place to gather and upwards the loss to avoid taking place risks such as detonation. Therefore, the hydrogen ignition device provided by the invention can ignite the hydrogen overflowing from any area of the combustion pool in time, so that the hydrogen combustion is stable and the deflagration risk is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a hydrogen ignition device of a hydrogen combustion cell according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydrogen combustion system of a hydrogen combustion cell according to an embodiment of the present invention;
fig. 3 isbase:Sub>A schematic view ofbase:Sub>A-base:Sub>A section of the schematic view shown in fig. 1.
Reference numerals:
1-a combustion tank;
2-a hydrogen discharge line;
21-main tube;
22-a first branch;
23-a second branch pipe;
24-a riser;
25-a check valve;
26-a water discharge pipe;
27-a water drain valve;
3-a hydrogen ignition device;
31-fuel main;
32-fuel branch line;
33-electric fire-striking needle;
34-a flame nozzle;
35-a first valve;
36-a second valve;
4-an overflow tank;
5-bubble cap;
6, a water replenishing system;
61-water supplementing pipeline;
62-water replenishing valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As mentioned above, most of the existing hydrogen ignition devices use an electric spark to ignite hydrogen gas overflowing from the combustion chamber, that is, a plurality of electric ignition needles are disposed on the inner wall of the combustion chamber, and when hydrogen gas is discharged, the electric ignition needles first ignite the hydrogen gas near the inner wall of the combustion chamber, and then sequentially ignite the hydrogen gas near the center of the combustion chamber by means of flame spreading. The inventor finds that the burning sequence of the hydrogen overflowed from different areas in the combustion pool is different in the mode, and particularly the hydrogen in the central area of the combustion pool is burnt at the latest. And because the density of the hydrogen is very small and the upward dissipation capacity is strong, when the hydrogen close to the inner wall of the combustion pool is ignited, the hydrogen at the center of the combustion pool is already gathered and dissipated upwards. On one hand, the ignition and explosion of the cable are easy to occur when the cable is ignited, and the cable is harmful to field equipment and workers; on the other hand, part of the hydrogen already escapes from the combustion area before combustion and reaches the external environment, and when the concentration of the hydrogen in the external environment reaches a certain range, the risk of fire is easily caused when encountering a fire source.
Based on this, the inventor provides a hydrogen ignition device and a hydrogen combustion system of hydrogen combustion pond, can ignite the hydrogen that overflows from arbitrary region of combustion pond in time, make hydrogen burning stable, the detonation risk is low.
In a first aspect, as shown in fig. 1, an embodiment of the present invention provides a hydrogen ignition device for a hydrogen combustion pool, which is applied to a hydrogen combustion system of the hydrogen combustion pool 1, where the combustion system includes the combustion pool 1, multiple bubble caps 5 and a hydrogen discharge pipeline 2; wherein, the combustion pool 1 contains water, a plurality of bubble caps 5 are uniformly arranged in the combustion pool 1, the bottom end of each bubble cap 5 is immersed in the water, the hydrogen discharge pipeline 2 is communicated with the bubble caps 5, and the hydrogen discharge pipeline 2 is used for introducing hydrogen to be combusted into the bubble caps 5;
the hydrogen ignition device comprises:
a fuel main pipe 31 and a plurality of fuel branch pipes 32, wherein one end of the fuel main pipe 31 is connected with a fuel supply device, the other end of the fuel main pipe 31 is respectively connected with an inlet end of each fuel branch pipe 32, an inlet end of each fuel branch pipe 32 is provided with an electric ignition needle 33, an outlet end of each fuel branch pipe 32 is provided with a plurality of flame nozzles 34, each flame nozzle 34 is positioned above the combustion pool 1, and the distance between each flame nozzle 34 and the corresponding bubble cap 5 is smaller than a preset distance; wherein each electric ignition needle 33 is used for igniting the fuel in the fuel branch pipe 32 corresponding thereto, and the flame formed by the combustion of the fuel is ejected from the flame nozzle 34 of the corresponding fuel branch pipe 32 for combusting the hydrogen gas overflowing from the corresponding bubble cap 5.
The embodiment of the invention provides a hydrogen ignition device of a hydrogen combustion pool, which is applied to a hydrogen combustion system, the hydrogen ignition device 3 is provided with a plurality of fuel branch pipes 32, and each fuel branch pipe 32 is provided with an electric ignition needle 33 and a plurality of flame nozzles 34, on one hand, the fuel in the corresponding branch pipe can be ignited through the electric ignition needle 33, and the flame after combustion is sprayed out from the corresponding flame nozzle 34. On the other hand, each flame nozzle 34 is arranged above the combustion pool 1, and the distance between each flame nozzle 34 and the corresponding bubble cap 5 is smaller than the preset distance, so that after hydrogen overflows from any bubble cap 5, the hydrogen can be quickly ignited by the flame sprayed by the flame nozzle 34 nearby the hydrogen, and then the hydrogen at the center of the combustion pool 1 is prevented from being aggregated and upwardly dissipated due to late combustion, and risks such as deflagration are avoided. Therefore, the hydrogen ignition device 3 provided by the embodiment can ignite the hydrogen overflowing from any area of the combustion pool 1 in time, so that the hydrogen combustion is stable and the deflagration risk is low.
It should be noted that the preset distance is set as follows: when the hydrogen escapes from the water surface below the bubble cap 5, the splashed water splash can not extinguish the flame, and the hydrogen can be ignited by the flame in 3S after overflowing. In addition, the electric sparking pin 33 is arranged outside the combustion pool 1, so that the phenomenon that the electric sparking pin 33 is in contact with water splash sputtered when hydrogen escapes from the water surface to form short circuit, and the circuit is damaged, and the hydrogen ignition task cannot be completed is avoided.
In some embodiments, the fuel is liquefied petroleum gas, but may be natural gas or the like as long as it can perform a pilot action. The fuel supply device may be a fuel tank, such as a liquefied petroleum gas tank or a natural gas tank, and the like, and the present application is not particularly limited.
In some embodiments, the inlet end of each fuel rail 32 is provided with a first valve 35.
In this embodiment, by providing a first valve 35 on each fuel branch 32, when one of the fuel branches 32 needs to be filled with fuel, the corresponding first valve 35 is opened, and the corresponding electric firing pin 33 is controlled to operate, so as to generate electric spark, ignite the fuel in the pipe, and form a stable flame at the flame nozzle 34, and the hydrogen can be ignited above the water surface when escaping from the water surface. When the combustion is finished or the maintenance is needed due to the fault, the valve on the corresponding pipeline is closed, and the combustion can be finished. A first valve 35 is provided in each fuel branch 32 to facilitate individual control of each fuel branch 32 and increase flexibility of the device. In addition, each first valve 35 is disposed outside the combustion chamber 1 to facilitate installation and maintenance.
In some embodiments, a second valve 36 is provided on the fuel main 31. By providing the second valve 36, a uniform control of all the fuel branches 32, including fuel supply and fuel cutoff, can be achieved, which saves time and also facilitates quick cutoff in case of failure.
In operation, the inventors have also found that: the arrangement of the hydrogen discharge pipes of the existing combustion system causes uneven resistance in each branch pipe, because after the main gas supply pipe 21 enters the combustion tank 1, one end of each branch pipe is connected to the main pipe 21 in sequence along the hydrogen flow direction, and the other end is closed. The pressure of hydrogen in the branch pipe close to the hydrogen inlet end is high, the gas output is high, and the pressure of hydrogen in the pipeline is low and the gas output is low due to the influence of flow resistance and the like of the branch pipe far away from the hydrogen inlet end. Especially, after the hydrogen flow of the external gas supply equipment is disturbed, the fluctuation of the gas output of each branch pipe is larger, and safety accidents such as deflagration and the like are caused.
In order to solve the above problems, in a second aspect, as shown in fig. 1 and fig. 2, an embodiment of the present invention further provides a hydrogen combustion system of a hydrogen combustion pool, comprising a combustion pool 1, a plurality of bubble caps 5, a hydrogen discharge line 2 and a hydrogen ignition device 3 provided in any one of the above embodiments, wherein,
water is contained in the combustion pool 1;
the plurality of bubble caps 5 are uniformly arranged in a preset area of the combustion pool 1, and the bottom end of each bubble cap 5 is immersed in water;
the hydrogen discharge pipeline 2 includes a main pipe 21, two first branch pipes 22, a plurality of second branch pipes 23, and a plurality of riser pipes 24 uniformly arranged on each second branch pipe 23, which are arranged in order in the hydrogen flow direction; wherein, each second branch pipe 23 is uniformly distributed in the lower space of the combustion pool 1, the inlet end of the main pipe 21 is connected with external hydrogen discharge equipment, the outlet end of the main pipe 21 passes through the side wall of the combustion pool 1 and then is respectively connected with the inlet end of each first branch pipe 22, one end of each second branch pipe 23 is respectively connected with the outlet end of one of the first branch pipes 22 in sequence along the downwind direction, and the other end of each second branch pipe 23 is respectively connected with the outlet end of the other first branch pipe 22 in sequence along the counter-wind direction;
the number of the air risers 24 is the same as that of the bubble caps 5, the outlet end of each air riser 24 is respectively communicated with one bubble cap 5, and the outlet end of each air riser 24 is higher than the water surface in the combustion pool 1.
In this embodiment, the hydrogen combustion system can ensure that the intake pressure of each second branch pipe 23 is relatively high when the intake pressure of one end is relatively low, for each second branch pipe 23, by connecting one end of each second branch pipe 23 to the outlet end of one of the first branch pipes 22 in sequence in the downwind direction, and connecting the other end of each second branch pipe 23 to the outlet end of the other first branch pipe 22 in sequence in the counter-wind direction. So, can make the pressure at both ends balance each other for hydrogen is close to every bubble cap 5's resistance, and then hydrogen is close from the speed that every bubble cap 5 escaped, and hydrogen distributes evenly in the combustion chamber 1, guarantees that hydrogen stable combustion reduces the detonation risk in the combustion chamber 1. It can be seen that the system can ensure that hydrogen is uniformly combusted in the combustion chamber 1, further reducing the risk of deflagration.
For example, taking 6 second branch pipes 23 as an example, which are respectively numbered as 1# branch pipe, 2# branch pipe, 3# branch pipe, 4# branch pipe, 5# branch pipe and 6# branch pipe, when one end of the 6 second branch pipes 23 is connected to the outlet end of one of the first branch pipes 22 in sequence along the gas flow direction, hydrogen flows through the 1# branch pipe, 2# branch pipe, 3# branch pipe, 4# branch pipe, 5# branch pipe and 6# branch pipe in sequence, and at this time, the pressure of hydrogen entering the 1# branch pipe is the largest, and the pressure entering the 6# branch pipe is the smallest. Meanwhile, when the other ends of the 6 second branch pipes 23 are sequentially connected to the outlet end of the other first branch pipe 22 in the counter-airflow direction, hydrogen gas sequentially flows through the 6# branch pipe, the 5# branch pipe, the 4# branch pipe, the 3# branch pipe, the 2# branch pipe, and the 1# branch pipe, and at this time, the pressure of hydrogen gas entering the 6# branch pipe is the largest, and the pressure of hydrogen gas entering the 1# branch pipe is the smallest. Then, the pressures at the two ends of any one second branch pipe 23 can be balanced, so that the effects of balanced air outlet and stable combustion can be achieved. Of course, the number of the second branch pipes 23 and the gas lift pipes 24 is not specifically limited in the present application, and the user may specifically set the number according to the size of the combustion chamber 1 and the discharge amount of hydrogen.
In some embodiments, a check valve 25 is provided on the main pipe 21, and the check valve 25 is used to prevent external gas from entering the hydrogen gas discharge apparatus. That is, only hydrogen gas is allowed to flow from the hydrogen gas discharge device to the combustion chamber 1, and gas such as air is not allowed to flow back to the hydrogen gas discharge device, to prevent contamination of the device.
It should be noted that the hydrogen gas discharge device may be a rocket tank, a filling pipe, a liquid hydrogen storage tank, etc., and the present application is not limited specifically. In addition, for some application scenarios, the hydrogen gas flowing out of the hydrogen discharge device is low-temperature hydrogen gas, and in this case, in order to ensure the service life of the check valve 25, the check valve 25 may adopt a low-temperature check valve 25. The user can autonomously select an appropriate check valve 25 according to the characteristics of the hydrogen gas.
In some embodiments, as shown in fig. 3, each of the first branch pipes 22 and each of the second branch pipes 23 are arranged at a height higher than a height of the pipe at the lowest position of the main pipe 21, and a discharge pipe 26 is connected to the pipe at the lowest position of the main pipe 21, and a discharge valve 27 is provided on the discharge pipe 26.
In this embodiment, if there is water accumulated in the hydrogen pipeline, the hydrogen pipeline will be blocked, and the uniform distribution of hydrogen in the combustion tank 1 will be affected. Specifically, after letting in hydrogen, can lead to the resistance higher because of the existence of ponding in the branch pipe that has ponding, hydrogen is unable to pass through, and it is inhomogeneous to lead to the hydrogen that emerges from combustion chamber 1, causes the detonation risk. In this embodiment, the water drain pipe 26 and the water drain valve 27 are arranged at the low point, before the hydrogen gas is introduced, the water drain valve 27 is opened first, accumulated water in each pipeline is drained completely, and then the water drain valve 27 is closed, so that the hydrogen gas can be introduced normally.
In some embodiments, the wall of the combustion chamber 1 is provided with an overflow port with a predetermined height, which is higher than the bottom end of the bubble cap 5 and lower than the outlet height of the riser 24, and the overflow port is used for communicating with the outside.
In this embodiment, in order to make the combustion system operate normally, it is necessary to ensure that the bottom end of the bubble cap 5 is in the water and the outlet of the riser 24 is on the water surface, so that the water level of the combustion pool 1 is within a preset range, that is, the water level is higher than the bottom end of the bubble cap 5 and lower than the outlet of the riser 24, so that the hydrogen enters the bubble cap 5 from the riser 24, passes through the water seal, and then escapes from the water surface to be ignited by the fuel spray gun. It follows that an overflow must be provided in the combustion chamber 1 to prevent the water level from being too high. In some embodiments, the predetermined height is smaller than the outlet height of the air-lift pipe 24, and when the water level of the combustion pool 1 is higher than the predetermined height, the water can flow out from the overflow port to the outside.
In some embodiments, the device further comprises an overflow tank 4, the overflow tank 4 is communicated with the combustion tank 1 through an overflow port, and water in the combustion tank 1 flows into the overflow tank 4 through the overflow port.
In this embodiment, the overflow tank 4 is provided to recover the water overflowing from the combustion tank 1, thereby preventing waste and water from flowing to the outside to pollute the environment.
It should be noted that the overflow tank 4 and the combustion tank 1 may also be designed as a whole, and at this time, the overflow tank 4 and the combustion tank 1 are separated into two spaces by an overflow weir, as long as it can be ensured that the excess water can be discharged to the overflow tank 4 when the water level of the combustion tank 1 exceeds a preset height.
In some embodiments, the bottom end of the overflow basin 4 is provided with a drain. Through setting up the outlet, can be with the water discharge in the overflow tank 4, the recycle of being convenient for on the one hand, on the other hand also can prevent that the interior water level of overflow tank 4 is too high.
In some embodiments, the water replenishing system 6 further comprises a water replenishing system 6, wherein the water replenishing system 6 comprises a water replenishing pipeline 61 and a water replenishing valve 62 arranged on the water replenishing pipeline 61;
the wall of the combustion pool 1 is also provided with a water replenishing port, one end of a water replenishing pipeline 61 is connected with external water supply equipment, and the other end of the water replenishing pipeline 61 is communicated with the water replenishing port.
In this embodiment, before the hydrogen combustion discharge starts, the water replenishing valve 62 is opened to fill the combustion pool 1 with water, and after the water level reaches the overflow port of the overflow pool 4, the opening degree of the water replenishing valve 62 is reduced to maintain a small flow rate for continuously replenishing water, so as to ensure that the water level of the combustion pool 1 is higher than the bottom end of the bubble cap 5 and lower than the outlet of the riser 24.
It should be noted that the fuel valve, the water drain valve 27, and the water replenishing valve 62 are all preferably shut-off valves, such as a stop valve or a check valve 25, and may be regulating valves, and the form of the valves is not specifically limited in the present application.
In some embodiments, each blister 5 has an inner-outer double-layer structure, and the space of the inner layer is communicated with the space of the outer layer;
the inner layer is communicated with the riser 24, the top end of the outer layer is closed, the bottom end of the outer layer is open, and the bottom end of the outer layer is immersed in water.
In this embodiment, the double-layer structure of the bubble cap 5 can ensure that the hydrogen gas enters the bubble cap 5 from the gas lift pipe 24, passes through the water seal, and then escapes from the water surface to be ignited by the hydrogen gas ignition device 3.
It should be noted that the hydrogen ignition device and the hydrogen combustion system shown in the present invention only show the necessary devices for ensuring the normal operation of the device and the system, and in other embodiments, the device and the system may further include more devices, valves or pipes, which is not limited in this application.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A hydrogen ignition device of a hydrogen combustion pool is applied to a hydrogen combustion system of the hydrogen combustion pool (1), and the combustion system comprises the combustion pool (1), a plurality of bubble caps (5) and a hydrogen discharge pipeline (2); wherein the combustion pool (1) contains water, a plurality of bubble caps (5) are uniformly arranged in the combustion pool (1), the bottom end of each bubble cap (5) is immersed in the water, the hydrogen discharge pipeline (2) is communicated with the bubble caps (5), and the hydrogen discharge pipeline (2) is used for introducing hydrogen to be combusted into the bubble caps (5); characterized in that said hydrogen ignition device (3) comprises:
the fuel supply device comprises a fuel main pipe (31) and a plurality of fuel branch pipes (32), wherein one end of the fuel main pipe (31) is connected with a fuel supply device, the other end of the fuel main pipe is respectively connected with an inlet end of each fuel branch pipe (32), the inlet end of each fuel branch pipe (32) is provided with an electric ignition needle (33), the outlet end of each fuel branch pipe is provided with a plurality of flame nozzles (34), each flame nozzle (34) is positioned above the combustion pool (1), and the distance between each flame nozzle (34) and the corresponding bubble cap (5) is smaller than a preset distance; wherein each electric ignition needle (33) is used for igniting the fuel in the fuel branch pipe (32) corresponding to the electric ignition needle, and the flame formed by the combustion of the fuel is sprayed out from the flame nozzle (34) of the corresponding fuel branch pipe (32) to be used for combusting the hydrogen overflowed from the corresponding bubble cap (5).
2. A hydrogen ignition device according to claim 1, characterized in that the inlet end of each fuel branch pipe (32) is provided with a first valve (35).
3. A hydrogen ignition device according to claim 1, characterized in that a second valve (36) is arranged in the fuel main (31).
4. A hydrogen combustion system of a hydrogen combustion cell, characterized by comprising a combustion cell (1), a plurality of bubble caps (5), a hydrogen discharge line (2) and a hydrogen ignition device (3) according to any one of claims 1 to 3; wherein, the first and the second end of the pipe are connected with each other,
water is contained in the combustion pool (1);
a plurality of bubble caps (5) are uniformly arranged in a preset area of the combustion pool (1), and the bottom end of each bubble cap (5) is immersed in water;
the hydrogen discharge pipeline (2) comprises a main pipe (21), two first branch pipes (22), a plurality of second branch pipes (23) and a plurality of air risers (24) which are uniformly arranged on each second branch pipe (23) and are sequentially arranged along the flow direction of hydrogen; each second branch pipe (23) is uniformly distributed in the lower space of the combustion pool (1), the inlet end of the main pipe (21) is connected with external hydrogen discharge equipment, the outlet end of the main pipe (21) penetrates through the side wall of the combustion pool (1) and then is respectively connected with the inlet end of each first branch pipe (22), one end of each second branch pipe (23) is respectively and sequentially connected with the outlet end of one first branch pipe (22) along the downwind direction, and the other end of each second branch pipe (23) is respectively and sequentially connected with the outlet end of the other first branch pipe (22) along the counter-current direction;
the number of the air lift pipes (24) is the same as that of the bubble caps (5), the outlet end of each air lift pipe (24) is communicated with one bubble cap (5), and the outlet of each air lift pipe (24) is higher than the water surface in the combustion pool (1).
5. The combustion system as claimed in claim 4, wherein a check valve (25) is provided on the main pipe (21), the check valve (25) being for preventing external gas from entering the hydrogen discharge apparatus.
6. The combustion system as claimed in claim 4, characterised in that each of the first branch pipes (22) and each of the second branch pipes (23) are arranged at a height higher than the height of the pipe at the lowest position of the main pipe (21), and a water discharge pipe (26) is connected to the pipe at the lowest position of the main pipe (21), and a water discharge valve (27) is provided on the water discharge pipe (26).
7. The combustion system according to claim 4, characterized in that the wall of the combustion chamber (1) is provided with an overflow opening of a predetermined height, said predetermined height being higher than the height of the bottom end of the bubble cap (5) and lower than the height of the outlet of the riser (24), said overflow opening being adapted to communicate with the outside.
8. The combustion system according to claim 7, further comprising an overflow sump (4), through which the overflow sump (4) communicates with the combustion sump (1), through which water in the combustion sump (1) flows into the overflow sump (4).
9. The combustion system as claimed in claim 4, further comprising a water replenishing system (6), wherein the water replenishing system (6) comprises a water replenishing pipeline (61) and a water replenishing valve (62) arranged on the water replenishing pipeline (61);
the wall of the combustion pool (1) is also provided with a water replenishing port, one end of the water replenishing pipeline (61) is connected with external water supply equipment, and the other end of the water replenishing pipeline (61) is communicated with the water replenishing port.
10. The combustion system according to claim 4, wherein each of the bubble caps (5) has an inner-outer double-layer structure, and the space of the inner layer is communicated with the space of the outer layer;
the inner layer is communicated with the gas lift pipe (24), the top end of the outer layer is closed, the bottom end of the outer layer is open, and the bottom end of the outer layer is immersed in water.
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