Energy-saving efficient combustor and hydrogen production equipment and hydrogen production process thereof

Abstract

The energy-saving efficient burner comprises a fixing base, an ignition device, a gas pipe, an oxyhydrogen pipe and a combustion-supporting air cylinder, the gas pipe and the oxyhydrogen pipe are located in the combustion-supporting air cylinder, a flame outlet is formed in the front end of the combustion-supporting air cylinder, and the front end of the oxyhydrogen pipe is connected with the middle section of the gas pipe through a jet mixer; the front end of the gas pipe is closed, gas outlet holes are distributed in the periphery of the gas pipe, and the front end of the gas pipe extends to the flame outlet. The invention relates to hydrogen production equipment and a hydrogen production process. According to the energy-saving efficient combustor, a fuel internal mixing mode is adopted, potential safety hazards caused by external premixing of oxyhydrogen and oxygen are avoided, safety and reliability are achieved, mixing is conducted through the jet flow mixer, it is ensured that mixing is uniform, the combustion efficiency is improved, and energy loss is reduced; the oxyhydrogen and the natural gas serve as mixed fuel, natural gas consumption is reduced, energy is saved, input cost is reduced, only water vapor is generated during oxyhydrogen combustion, harmful emission is avoided, and the trend of clean energy is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mixed combustion, in particular to an energy-saving and efficient burner, a hydrogen production equipment and a hydrogen production process. BACKGROUND

[0002] The existing burner of the combustion kiln mostly uses pure hydrogen and natural gas as mixed fuel, which is relatively safe, but also has high investment cost. With the improvement of environmental protection consciousness and the development of renewable energy, it is becoming more and more important to find a cleaner and more efficient energy alternative. Hydrogen-oxygen gas is a mixed gas with high calorific value, which is prepared by electrolysis and other processes from water as raw material, and has a specific ratio of hydrogen and oxygen mixed gas. The energy density of hydrogen-oxygen gas combustion is high, and only water vapor is produced after combustion, without harmful gas emission, so it is considered as an environmentally friendly and clean fuel.

[0003] Because hydrogen-oxygen gas has very high combustion speed and explosiveness, and the existing burner mixes pure hydrogen and natural gas before entering the burner, if it is directly applied to hydrogen-oxygen gas and natural gas mixed combustion, there may be safety hazards, and there may also be problems of uneven mixing affecting combustion efficiency. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an energy-saving and efficient burner, which is safe and reliable, has high combustion efficiency, saves energy and reduces investment cost. The present application also provides a hydrogen production equipment and a hydrogen production process.

[0005] The present application adopts the following scheme: an energy-saving and efficient burner, comprising a fixed seat, an ignition device, a gas pipe, a hydrogen-oxygen gas pipe and a combustion air cylinder, the gas pipe and the hydrogen-oxygen gas pipe are located inside the combustion air cylinder, the front end of the combustion air cylinder is provided with a flame outlet, the front end of the hydrogen-oxygen gas pipe is connected to the middle section of the gas pipe through a jet mixer, the front end of the gas pipe is closed and the periphery is provided with gas outlets, and the front end of the gas pipe extends to the flame outlet.

[0006] Further, the jet mixer comprises a nozzle and a mixing pipe body sleeved on the nozzle, a negative pressure suction cavity, a contraction inlet, a mixing throat cavity and a diffusion outlet are sequentially arranged inside the mixing pipe body from back to front, a conical nozzle is arranged at the middle of the negative pressure suction cavity at the front of the nozzle, and a suction inlet is formed in the side of the rear end of the mixing pipe body and communicated with the negative pressure suction cavity.

[0007] Further, the rear end of the gas pipe and the hydrogen-oxygen gas pipe is connected with the fixed seat, the fixed seat is provided with a gas inlet communicated with the gas pipe and a hydrogen-oxygen gas inlet communicated with the hydrogen-oxygen gas pipe.

[0008] Further, the front part of the fixed seat is provided with a first flange part, the rear end of the combustion air cylinder is provided with a second flange part connected with the first flange part, and the rear end side of the combustion air cylinder is provided with an air inlet; a flange plate is fixedly connected to the combustion air cylinder outside the air inlet.

[0009] Further, the combustion air cylinder is internally provided with an air outlet disc near the flame outlet position, the air outlet disc is distributed with a plurality of air outlet holes, and the periphery of the air outlet disc is distributed with a plurality of rotation flow grooves which are obliquely arranged and penetrate through the two side faces of the air outlet disc.

[0010] Further, the ignition device comprises an ignition electrode connected to the fixed seat, the probe of the ignition electrode extends to the flame outlet position; the fixed seat is further connected with a flame detection electrode, the probe of the flame detection electrode extends to the flame outlet position.

[0011] Another technical scheme of the present application: a hydrogen production equipment for providing hydrogen and oxygen gas for an energy-saving and efficient burner, comprising a steam tank, a heat reaction furnace and a condenser connected in sequence through pipelines, the heat reaction furnace is internally filled with reaction fillings, and the mass percentage of each component in the reaction fillings is: 30% aluminum scrap, 15% silicon powder, 10% magnesium powder, 25% calcium powder, 15% iron scrap and 5% cement.

[0012] Further, the steam tank is provided with a first safety valve, a steam outlet, a water inlet and a first pressure gauge at the top, a first electric heating rod is arranged at the bottom of the steam tank, a first liquid level meter is arranged at the side of the steam tank, a blowdown port is arranged at the bottom of the steam tank, and a blowdown valve is arranged at the blowdown port; the heat reaction furnace is provided with a steam inlet at one end and a first gas outlet at the other end, and is provided with a second safety valve and a second pressure gauge at the top, and is internally provided with a thermocouple; the condenser is provided with a cooling water inlet, a cooling water outlet and a second liquid level meter at the side, is provided with a second gas outlet at the top and an air inlet at the lower part, is provided with a condensed water drain port at the bottom, and is provided with a drain valve at the condensed water drain port.

[0013] Still another technical scheme of the present application: a hydrogen production process of the hydrogen production equipment as described above, comprising the following steps: (1) grinding each component of the reaction fillings into a powder state, mixing the reaction fillings by fully stirring to form reaction filling particles, and drying; (2) heating the heat reaction furnace filled with the reaction filling particles to 150-200 DEG C, then slowly introducing water vapor, and hydrogen and oxygen gas can be produced after 5 minutes; (3) drying the hydrogen and oxygen gas produced by the heat reaction furnace through the condenser.

[0014] Compared with the prior art, the energy-saving and efficient burner has the following beneficial effects: the energy-saving and efficient burner adopts an internal fuel mixing mode, avoids the safety hidden danger of external pre-mixing of hydrogen and oxygen, is safe and reliable, and ensures uniform mixing and improves combustion efficiency through the jet mixer, thereby reducing energy loss; hydrogen and oxygen and natural gas are used as mixed fuel, the amount of natural gas is reduced, energy is saved, and input cost is reduced, since hydrogen and oxygen combustion only produces water vapor, there is no harmful emission, and the clean energy trend is met; meanwhile, the hydrogen production equipment utilizes specific reaction fillers and water vapor for reaction, and hydrogen can be prepared in a low-temperature (150-200 DEG C) environment, compared with the traditional electrolysis mode, the hydrogen production cost is greatly reduced, and the hydrogen production efficiency is better.

[0015] In order to make the purpose, technical scheme and advantages of the present application more clear, specific embodiments and related drawings will be further described below. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the energy-saving and efficient burner of the embodiment of the present application; Figure 2 is a cross-sectional view of the jet mixer of the embodiment of the present application; Figure 3 is Figure 1 is a K view of the embodiment of the present application; Figure 4 is a structure diagram of the hydrogen production equipment of the embodiment of the present application; Explanation of reference numerals in the drawing: 110 - fixed seat, 111 - gas inlet, 112 - hydrogen and oxygen inlet, 113 - first flange part, 120 - gas pipe, 121 - gas outlet hole, 130 - hydrogen and oxygen pipe, 131 - flame arrester, 140 - combustion air cylinder, 141 - flame outlet, 142 - second flange part, 143 - air inlet, 144 - flange plate, 150 - jet mixer, 151 - nozzle, 152 - mixing pipe body, 153 - negative pressure suction cavity, 154 - contraction inlet, 155 - mixing throat cavity, 156 - diffusion outlet, 157 - suction inlet, 160 - air outlet disc, 161 - air outlet hole, 162 - cyclone groove, 170 - ignition electrode, 180 - flame detection electrode, 200 - steam tank, 210 - first safety valve, 220 - steam outlet, 230 - water inlet, 240 - first pressure gauge, 250 - first electric heating rod, 260 - first liquid level meter, 270 - blowdown valve, 300 - hot reaction furnace, 310 - steam inlet, 320 - first gas outlet, 330 - second safety valve, 340 - second pressure gauge, 350 - thermocouple, 400 - condenser, 410 - cooling water inlet, 420 - cooling water outlet, 430 - second liquid level meter, 440 - second gas outlet, 450 - gas inlet, 460 - drain valve. DETAILED DESCRIPTION

[0017] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] like Figures 1-3 As shown, an energy-saving and high-efficiency burner includes a fixed base 110, an ignition device, a gas pipe 120, a hydrogen-oxygen pipe 130, and a combustion-supporting air duct 140. The gas pipe and the hydrogen-oxygen pipe are located inside the combustion-supporting air duct. The gas pipe 120 is located at the center of the combustion-supporting air duct 140. A flame outlet 141 is provided at the front end of the combustion-supporting air duct. The front end of the hydrogen-oxygen pipe is connected to the middle section of the gas pipe through a jet mixer 150. The front end of the gas pipe is closed and has gas outlet holes 121 distributed around its periphery. The front end of the gas pipe 120 extends to the flame outlet. This burner employs an internal fuel mixing method, mixing hydrogen, oxygen, and natural gas within the burner itself. This avoids the safety hazards associated with external premixing of hydrogen and oxygen, ensuring safety and reliability. Furthermore, the mixing is achieved through a jet mixer, utilizing the Venturi effect to actively draw in hydrogen and oxygen by creating negative pressure, ensuring uniform mixing, improving combustion efficiency, and reducing energy consumption. When hydrogen, oxygen, and natural gas are used as a mixed fuel, the hydrogen and oxygen content can be increased to approximately 30%, reducing natural gas consumption and saving energy. Since the combustion of hydrogen and oxygen only produces water vapor with no harmful emissions, it aligns with the trend towards clean energy and reduces investment costs.

[0020] In this embodiment, a section of the gas pipe is disconnected in the middle to connect to the jet mixer 150. The two ends of the jet mixer 150 are welded to the two ends of the disconnected section of the gas pipe. The jet mixer 150 includes a nozzle 151 and a mixing tube 152 fitted on the nozzle. The mixing tube has a negative pressure suction chamber 153, a constriction inlet 154, a mixing throat 155, and a diffusion outlet 156 arranged sequentially from back to front inside. The nozzle has a conical nozzle located in the middle of the negative pressure suction chamber at the front. The mixing tube has an intake port 157 communicating with the negative pressure suction chamber at the rear side.

[0021] In this embodiment, the rear ends of the gas pipe 120 and the hydrogen-oxygen pipe 130 are connected to a fixed base. The fixed base 110 is provided with a gas inlet 111 communicating with the gas pipe and a hydrogen-oxygen inlet 112 communicating with the hydrogen-oxygen pipe.

[0022] In the embodiment, the front part of the fixed seat is provided with a first flange part 113, the rear end of the combustion air cylinder is provided with a second flange part 142 connected with the first flange part through bolts, and the rear end side of the combustion air cylinder is provided with an air inlet 143. The fixed seat 110 and the combustion air cylinder are connected through the flanges, supporting the modular assembly, facilitating the on-site disassembly and replacement of parts.

[0023] In the embodiment, the combustion air cylinder is externally fixedly connected with a flange plate 144 located in front of the air inlet. The flange plate is arranged to facilitate the installation of the entire burner on the combustion kiln.

[0024] In the embodiment, the combustion air cylinder is internally provided with an air outlet disc 160 near the flame outlet position, the air outlet disc is distributed with a plurality of air outlet holes 161, and the periphery of the air outlet disc is distributed with a plurality of rotation flow grooves 162 arranged obliquely and penetrating through the two side surfaces of the air outlet disc. The design of the air outlet disc enhances the mixing effect of air and fuel, and the rotation flow grooves generate a rotation flow effect, so that the flame is more concentrated and stable, and the combustion effect is better.

[0025] In the embodiment, the ignition device includes an ignition electrode 170 connected to the fixed seat, and the probe of the ignition electrode extends to the flame outlet.

[0026] In the embodiment, the fixed seat is further connected with a flame detection electrode 180, and the probe of the flame detection electrode extends to the flame outlet. The flame detection electrode 180 is used to detect whether the ignition is successful, and if it is detected that the ignition is not successful, the external natural gas inlet pipeline is cut off. The air outlet disc 160 is further provided with a gap hole for the gas pipe, the probe of the ignition electrode and the probe of the flame detection electrode to pass through.

[0027] In the embodiment, the flame outlet is conical. The conical flame outlet 141 is more concentrated.

[0028] In the embodiment, the oxyhydrogen gas pipe is connected with a flame arrester 131 to prevent backfire and further improve safety.

[0029] The application discloses a hydrogen production device for providing hydrogen-oxygen gas for an energy-saving high-efficiency burner, which comprises a steam tank 200, a thermal reaction furnace 300 and a condenser 400 which are sequentially connected through pipelines, the thermal reaction furnace is filled with reaction fillers, and the mass percentage of each component in the reaction fillers is as follows: 30% of aluminum scrap, 15% of silicon powder, 10% of magnesium powder, 25% of calcium powder, 15% of iron scrap and 5% of cement. The hydrogen production device utilizes specific reaction fillers and water vapor to carry out reaction, so that hydrogen gas can be prepared in a low-temperature (150-200 DEG C) environment; compared with a traditional electrolysis mode, the hydrogen production cost is greatly reduced; and the prepared hydrogen-oxygen mixed gas can be directly used for combustion of the burner, so that the traditional pure hydrogen gas is replaced, the amount of natural gas is reduced, and energy is saved.

[0030] In the embodiment, the steam tank 200 is provided with a first safety valve 210, a steam outlet 220, a water inlet 230 and a first pressure gauge 240 at the top, is provided with a first electric heating rod 250 at the inner bottom, is provided with a first liquid level meter 260 at the side, is provided with a blowdown port at the bottom, and is provided with a blowdown valve 270 at the blowdown port.

[0031] In the embodiment, the thermal reaction furnace 300 is provided with a steam inlet 310 at one end and a first gas outlet 320 at the other end, is provided with a second safety valve 330 and a second pressure gauge 340 at the top, is provided with a thermocouple 350 in the furnace, and the steam inlet 310 of the thermal reaction furnace 300 is connected with the steam outlet of the steam tank 200 through a pipeline.

[0032] In the embodiment, the condenser 400 is provided with a cooling water inlet 410, a cooling water outlet 420 and a second liquid level meter 430 at the side, is provided with a second gas outlet 440 at the top and an air inlet 450 at the lower part, is provided with a condensate water drain port at the bottom, is provided with a drain valve 460 at the condensate water drain port, and the air inlet 450 of the condenser is connected with the first gas outlet 320 of the thermal reaction furnace 300 through a pipeline; the second gas outlet 440 of the condenser is connected with a hydrogen-oxygen gas inlet of the burner through a gas supply pipeline, and a flow meter is arranged on the gas supply pipeline.

[0033] In the embodiment, a heating interlayer is arranged at the circumferential part of the thermal reaction furnace, and a second electric heating rod is arranged in the heating interlayer.

[0034] A hydrogen production process of the hydrogen production device as described above, comprising the following steps: (1) grinding each component of the reaction filler into a powder, mixing the components by fully stirring to form reaction filler particles, and drying; (2) after the hot reaction furnace is filled with the reaction filler particles, heating to 150-200 DEG C, then slowly passing in water vapor, and after 5 minutes, hydrogen-oxygen gas can be produced; (3) drying the hydrogen-oxygen gas produced by the hot reaction furnace through a condenser. The hydrogen production process utilizes the reaction of the reaction filler and water vapor in a low-temperature environment to produce hydrogen, and compared with the traditional electrolysis process, the cost of hydrogen production is greatly reduced, and the hydrogen production efficiency is better.

[0035] Table 1

[0036] Note: the amount of reaction filler is 1 kg, and the reaction temperature is 300 DEG C.

[0037] Table 1 provides a comparison of hydrogen production effects of reaction for 1 hour using different proportions of reaction fillers. As shown in Table 1, under the same conditions, the reaction filler of formula 7 (i.e., 30% aluminum chips, 15% silicon powder, 10% magnesium powder, 25% calcium powder, 15% iron chips, and 5% cement) can achieve a better hydrogen production effect.

[0038] Table 2

[0039] Note: the reaction filler formula used is: 30% aluminum chips, 15% silicon powder, 10% magnesium powder, 25% calcium powder, 15% iron chips, and 5% cement; the amount of reaction filler is 1 kg.

[0040] Table 2 provides a comparison of hydrogen production effects of reaction for 1 hour at different temperatures. As shown in Table 2, using the provided reaction filler for hydrogen production reaction, a higher hydrogen production efficiency can be achieved at 150-200 DEG C, and further increasing the temperature has little effect on improving the hydrogen production.

[0041] Any of the technical solutions disclosed in the above application, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that the preferred numerical range is only one of the many implementable numerical values with more obvious technical effects or representative values. Since there are many values, it is impossible to enumerate them all, so the application discloses some values to illustrate the technical solutions of the application, and the above enumerated values should not constitute a limitation on the protection scope of the application.

[0042] If the present application discloses or involves mutually fixedly connected parts or structural members, unless otherwise stated, the fixed connection can be understood as: detachably fixedly connected (for example, connected using bolts or screws), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, integrally formed by using a casting process) (obviously, an integral forming process cannot be used).

[0043] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present application include states or shapes similar, similar or close to them, unless otherwise stated.

[0044] Any component provided by the present application can be assembled from multiple individual components, or can be a single component manufactured by an integral forming process.

[0045] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above disclosed technical content to equivalent embodiments. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the present application without departing from the technical solution content of the present application still belongs to the protection scope of the present application technical solution.

Claims

1. An energy efficient burner, characterized by: The application relates to a hydrogen-oxygen gas generator, which comprises a fixing base, an ignition device, a gas pipe, a hydrogen-oxygen gas pipe and an air cylinder, the gas pipe and the hydrogen-oxygen gas pipe are located in the air cylinder, the front end of the air cylinder is provided with a flame outlet, the front end of the hydrogen-oxygen gas pipe is connected with the middle section of the gas pipe through a jet mixer, the front end of the gas pipe is closed and is provided with gas outlets, and the front end of the gas pipe extends to the flame outlet.

2. The energy efficient burner of claim 1, wherein: The jet mixer comprises a nozzle and a mixing pipe body sleeved on the nozzle, a negative pressure suction cavity, a contraction inlet, a mixing throat cavity and a diffusion outlet are sequentially arranged in the mixing pipe body from back to front, a conical nozzle is arranged in the middle of the negative pressure suction cavity, and a suction inlet is arranged in the side of the rear end of the mixing pipe body and communicated with the negative pressure suction cavity.

3. The energy efficient burner of claim 1, wherein: The rear end of the gas pipe and the hydrogen-oxygen gas pipe is connected with the fixing base, the fixing base is provided with a gas inlet communicated with the gas pipe and a hydrogen-oxygen gas inlet communicated with the hydrogen-oxygen gas pipe.

4. The energy efficient burner of claim 1, wherein: The front part of the fixing base is provided with a first flange part, the rear end of the air cylinder is provided with a second flange part connected with the first flange part, and the rear end of the air cylinder is provided with an air inlet; a flange plate is fixedly connected to the outside of the air cylinder and located in front of the air inlet.

5. The energy efficient burner of claim 1, wherein: The air cylinder is provided with an air outlet disc close to the flame outlet, a plurality of air outlet holes are arranged on the air outlet disc, and a plurality of rotational flow grooves are arranged on the periphery of the air outlet disc and extend through the two side faces of the air outlet disc.

6. The energy efficient burner of claim 1, wherein: The ignition device comprises an ignition electrode connected with the fixing base, the probe of the ignition electrode extends to the flame outlet, and a flame detection electrode is further connected with the fixing base, the probe of the flame detection electrode extends to the flame outlet.

7. A hydrogen generation apparatus for providing oxyhydrogen gas for an energy efficient burner, characterized by: The application relates to a hydrogen-oxygen gas generator, which comprises a fixing base, an ignition device, a gas pipe, a hydrogen-oxygen gas pipe and an air cylinder, the gas pipe and the hydrogen-oxygen gas pipe are located in the air cylinder, the front end of the air cylinder is provided with a flame outlet, the front end of the hydrogen-oxygen gas pipe is connected with the middle section of the gas pipe through a jet mixer, the front end of the gas pipe is closed and is provided with gas outlets, and the front end of the gas pipe extends to the flame outlet.

8. The hydrogen production plant of claim 7, wherein: The steam tank is provided with a first safety valve, a steam outlet, a water inlet and a first pressure gauge on the top, a first electric heating rod is arranged on the inner bottom of the steam tank, a first liquid level meter is arranged on the side of the steam tank, a blowdown port is arranged on the bottom of the steam tank, and a blowdown valve is arranged on the blowdown port; one end of the hot reaction furnace is provided with a steam inlet, the other end is provided with a first gas outlet, the top of the hot reaction furnace is provided with a second safety valve and a second pressure gauge, and a thermocouple is arranged in the hot reaction furnace; the side of the condenser is provided with a cooling water inlet, a cooling water outlet and a second liquid level meter, the top of the condenser is provided with a second gas outlet, the lower part of the condenser is provided with an air inlet, the bottom of the condenser is provided with a condensed water drainage port, and a drain valve is arranged on the condensed water drainage port.

9. A hydrogen production process for the hydrogen production apparatus as claimed in claim 7, characterized by: The application relates to a hydrogen-oxygen gas generator, which comprises a fixing base, an ignition device, a gas pipe, a hydrogen-oxygen gas pipe and an air cylinder, the gas pipe and the hydrogen-oxygen gas pipe are located in the air cylinder, the front end of the air cylinder is provided with a flame outlet, the front end of the hydrogen-oxygen gas pipe is connected with the middle section of the gas pipe through a jet mixer, the front end of the gas pipe is closed and is provided with gas outlets, and the front end of the gas pipe extends to the flame outlet. (1) the components of the reaction filler are ground into powder, mixed and stirred sufficiently to prepare reaction filler particles, and the reaction filler particles are dried; (2) the hot reaction furnace is filled with the reaction filler particles, heated to 150-200 DEG C, and then water vapor is slowly introduced, and hydrogen-oxygen gas can be produced after 5 minutes; and (3) the hydrogen-oxygen gas generated by the hot reaction furnace is dried through the condenser.

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