CN218210063U - Hot water heating furnace based on ammonia combustion - Google Patents
Hot water heating furnace based on ammonia combustion Download PDFInfo
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- CN218210063U CN218210063U CN202222795852.7U CN202222795852U CN218210063U CN 218210063 U CN218210063 U CN 218210063U CN 202222795852 U CN202222795852 U CN 202222795852U CN 218210063 U CN218210063 U CN 218210063U
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Abstract
The utility model discloses a hot water heating furnace based on ammonia combustion, which belongs to the technical field of heating furnaces and comprises a furnace body made of metal materials, wherein the furnace body comprises an inclined section furnace body and a vertical section furnace body which are mutually connected, and the lowest part of the inclined section furnace body is communicated with a drain pipe; a water flow jacket is formed on the side wall of the furnace body; the inner side of the furnace mouth of the inclined section furnace body is provided with a columnar high-frequency high-voltage electrode in an insulating and sealing way. The utility model provides a hot water heating furnace based on ammonia burning, the high voltage that high frequency high-voltage electrode produced in the fire door dissociates the ammonia that passes through, arouses, ionization formation ammonia plasma, and ammonia plasma and oxygen contact arouse the oxidation reaction of gas mixture, realize the burning of ammonia. The combustion gas heats the water in the water flow jacket in the flowing process of the furnace body, so as to achieve the purpose of heating hot water, and no carbon is discharged in the ammonia combustion process, so that greenhouse gas is not generated.
Description
Technical Field
The utility model relates to a hot water heating furnace based on ammonia burning belongs to heating furnace technical field.
Background
The heating furnace is a device for heating a medium to a predetermined temperature, and for example, when heating a fluid medium such as water, the heating furnace may use an electric heating tube as a heat source or may use combustion heat generated by burning fuel as a heat source. However, both heating methods have certain disadvantages, such as high energy consumption of electric heating tubes, and the common fuel can generate greenhouse gases harmful to the environment when burning. Under the appropriate combustion condition, the product of the ammonia gas can only contain nitrogen and water, and greenhouse gases can not be generated, so that the ammonia gas has the potential of being used as a clean fuel, but in the practical application process, the water generated by the combustion of the ammonia gas can influence the combustion process of the ammonia gas, and the ammonia gas is limited to be used as the fuel of a heating furnace.
On the other hand, the principle of the plasma ignition device which is applied more at present is that a high-power arc generates plasma to ignite fuel, and an anode and a cathode which generate the arc generate high temperature in the working process, so the electrode needs to be cooled, but the electrode still can not work for a long time on the premise of cooling, and the power supply of the arc ignition device needs to be cut off after the fuel is normally combusted. Therefore, the plasma ignition device of the related art cannot achieve continuous ionization and combustion of ammonia gas.
The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that prior art exists, provide a hot water heating furnace based on ammonia burning, energy utilization is high, and the electrode loss is little.
The utility model discloses an adopt following technical scheme to realize above-mentioned purpose:
a hot water heating furnace based on ammonia combustion comprises a furnace body made of metal, wherein the furnace body is grounded and comprises an inclined section furnace body and a vertical section furnace body which are mutually connected, the inner wall of the inclined section furnace body is obliquely and downwards arranged from a furnace mouth to the connection part of the inclined section furnace body and the vertical section furnace body, and the lowest part of the inclined section furnace body is communicated with a drain pipe;
a combustion gas flow channel is formed in the furnace body, and a water flow jacket is formed on the side wall of the furnace body;
a columnar high-frequency high-voltage electrode is installed on the inner side of the furnace mouth of the inclined section furnace body in an insulating and sealing manner, and an annular cavity is formed between the high-frequency high-voltage electrode and the inner wall of the inclined section furnace body;
and an ammonia gas and air introducing hole communicated with the annular cavity is formed in the furnace mouth of the inclined section furnace body.
Preferably, a sleeve made of metal is installed in a furnace mouth of the furnace body of the inclined section, the outer diameter of the sleeve is in clearance fit with the inner diameter of the furnace body of the inclined section, the front end opening of the sleeve is welded with the furnace mouth in a sealing mode, and a necking section is formed at the rear end of the sleeve so that a stepped annular cavity is formed between the high-frequency high-voltage electrode and the sleeve; the high-frequency high-voltage electrode is connected with the front port of the sleeve through an insulating sealing element.
Preferably, the outer side of the sleeve is sleeved with an annular magnet.
Preferably, the ammonia gas and air introduction holes are formed along the tangential direction of the cross section of the furnace mouth, and the ammonia gas and air introduction holes are uniformly distributed along the circumferential direction.
Preferably, the central axis of the water flow jacket outside the furnace body of the inclined section is upwards offset relative to the central axis of the furnace body of the inclined section.
Preferably, the combustion gas flow channel in the vertical section furnace body penetrates through the honeycomb-shaped heat exchange tube, a lower pipe opening of a honeycomb-shaped gap of the heat exchange tube is communicated with the combustion gas flow channel of the inclined section furnace body, and an upper pipe opening of the honeycomb-shaped gap of the heat exchange tube is communicated with the outer exhaust pipe.
Preferably, the outer side of the furnace body is wrapped with a heat insulation layer.
Preferably, the water flow jacket is provided with a temperature sensor, flow control valves are respectively arranged on pipelines for introducing ammonia gas and air, an ammonia gas alarm is arranged at the pipe orifice of the outer exhaust pipe, and the temperature sensor, the ammonia gas alarm, the flow control valves and the power supply of the high-frequency high-voltage electrode are controlled by the PLC.
Preferably, the working peak of the high-frequency high-voltage electrodePeak voltage of 1-15kV, power of 0.3-1kw, and introduction flow rates of ammonia gas and air of 1-2m 3 H and 0.5-2m 3 /h。
Benefits of the present application include, but are not limited to:
the utility model provides a hot water heating furnace based on ammonia burning, the high voltage that high frequency high voltage electrode produced in the fire door dissociates the ammonia of process, arouses, ionization formation ammonia plasma, and ammonia plasma and oxygen contact arouse the oxidation reaction of gas mixture, realize the burning of ammonia. The combustion gas heats the water in the water flow jacket in the flowing process of the furnace body, so as to achieve the purpose of heating hot water, and no carbon is discharged in the ammonia combustion process, so that greenhouse gas is not generated.
The ionization breakdown voltage of high-frequency high-voltage discharge is high, and the electric current is little, consequently the utility model discloses the temperature of well electrode is lower relatively, is favorable to reducing the loss of electrode with increase of service life. Moreover, the water flow in the water flow jacket can absorb the heat of the combustion gas to heat, and simultaneously, the water flow also plays a role in taking away the heat generated by the work of the high-frequency high-voltage electrode, so that the continuous work of the high-frequency high-voltage electrode is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of a hot water heating furnace based on ammonia combustion provided by the present invention;
FIG. 2 is an enlarged schematic view of various structures at the furnace mouth;
FIG. 3 is a top view of a honeycomb heat exchange tube;
fig. 4 is a schematic diagram of the specific application of the ammonia combustion-based hot water heating furnace provided by the present invention.
In the figure, 110, the inclined segment furnace body; 120. a vertical section furnace body; 200. a drain pipe; 300. an air flow channel; 310. a heat exchange pipe; 320. discharging the air out of the air outlet pipe; 400. a water flow jacket; 410. a water inlet pipe; 420. a water outlet pipe; 430. a temperature sensor; 440. an ammonia gas alarm; 500. a high-frequency high-voltage electrode; 510. an electrode mount; 520. a power source; 600. ammonia and air introduction holes; 700. a sleeve; 710. a necking section; 800. a heat-insulating layer; 900. a ring magnet.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein. Accordingly, the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in figure 1, the utility model provides a hot water heating stove based on ammonia burning, including the furnace body of metal material, furnace body ground connection sets up. The furnace body includes the slope section furnace body 110 and the vertical section furnace body 120 that link up each other, and the inner wall of slope section furnace body 110 sets up downwards to its and the linking position slope of vertical section furnace body 120 from its fire door, and the lower intercommunication of slope section furnace body 110 has drain pipe 200.
A combustion gas flow passage 300 is formed in the furnace body, and a water flow jacket 400 is formed on the side wall of the furnace body. The lower part and the upper part of the water flow jacket are respectively communicated with a water inlet pipe 410 and a water outlet pipe 420, water flow is guided into the water flow jacket 400 from the water inlet pipe 410 at the lower part, is heated in the flowing process in the furnace bodies of the inclined section and the vertical section, and is finally guided out from the water outlet pipe 420 at the upper part of the water flow jacket 400. The water inlet pipe 410 is preferably communicated with a water flow jacket outside the furnace mouth of the inclined section furnace body, so that water at each part in the water flow jacket can fully flow.
A columnar high-frequency high-voltage electrode 500 is installed in the furnace mouth of the inclined section furnace body 110 in an insulating and sealing mode, an annular cavity is formed between the high-frequency high-voltage electrode 500 and the inner wall of the inclined section furnace body 110, and the annular cavity forms an electric arc generating area.
The furnace mouth of the inclined-section furnace body 110 is provided with an ammonia gas and air introduction hole 600 communicating with the annular cavity for introducing a mixed gas of ammonia gas and air into the annular cavity.
The utility model provides a hot water heating furnace, overall structure is simple, is convenient for maintain. When the high-voltage ammonia combustion furnace works, the annular cavity between the high-frequency high-voltage electrode 500 and the furnace mouth of the inclined section furnace body 110 generates high voltage, so that ammonia passing through the annular cavity is dissociated, excited and ionized to form ammonia plasma containing a large number of high-activity cations, neutral particles and free electrons, and the ammonia plasma is in contact with oxygen to cause oxidation reaction of mixed gas, thereby realizing the combustion of the ammonia.
The combustion gas is jetted from the annular cavity into the furnace body, and exchanges heat with the water flow dividing wall in the water flow jacket 400 in the flowing process along the inclined section furnace body 110 and the vertical section furnace body 120, so that the temperature of the water flow is increased. And liquid water generated by ammonia combustion is collected to the bottom of the inclined section furnace body 110 and is discharged through the drain pipe 200 in time, so that the influence of water accumulated in the furnace body on the work of the furnace body is avoided.
As shown in fig. 1, the inner wall of the inclined furnace body 110 is inclined downwards to the joint part of the inclined furnace body 110 and the vertical furnace body 120, so that the combustion gas can impact the inner wall of the inclined furnace body 110 at a certain included angle, the effect of disturbing the combustion gas flow is achieved, the combustion gas is prevented from forming stable flow, and the heat exchange efficiency is improved. Generally, the inclination angle of the inner wall of the inclined zone furnace body 110 is 1-5 °.
The ionization breakdown voltage of high-frequency high-voltage discharge is high, and the electric current is little, consequently the utility model discloses the temperature of well electrode is lower relatively, is favorable to reducing the loss of electrode with increase of service life. Moreover, the water flow in the water flow jacket can absorb the heat of the combustion gas to heat, and simultaneously, the water flow also plays a role in taking away the heat generated by the work of the high-frequency high-voltage electrode, so that the energy utilization rate is high, the electrode loss is small, and the continuous work of the high-frequency high-voltage electrode is realized.
Further, the ammonia gas and air introduction hole 600 is opened in a tangential direction of a cross section of the furnace opening, and a plurality of ammonia gas and air introduction holes may be provided, each of which is uniformly arranged in a circumferential direction. The air current is spiral direction forward flow after getting into the fire door along tangential direction, can strengthen the disturbance, makes the ammonia and the air current that get into annular inner chamber more even.
In one preferred embodiment, a metal sleeve 700 is installed in the furnace mouth of the inclined furnace body 110, the outer diameter of the sleeve 700 is in clearance fit with the inner diameter of the inclined furnace body, the front end port of the sleeve 700 is hermetically welded with the furnace mouth of the inclined furnace body 110, and the sleeve 700 and the furnace body are simultaneously grounded.
A necking section 710 is formed at the rear end of the sleeve 700, so that a stepped annular cavity is formed between the high-frequency high-voltage electrode and the sleeve, and the efficient ionization of ammonia gas is favorably carried out at the necking section 710, and ammonia plasma beams and combustion beams are formed and sprayed out. When the annular cavity is arranged in a step shape, the difference between the inner radius and the outer radius of the front end of the annular cavity is preferably 5-20mm, and the difference between the inner radius and the outer radius of the necking part 710 is preferably 1-3mm.
As shown in fig. 2, an opening is formed in the casing 700 to communicate with the ammonia gas and air introduction hole 600, so that the ammonia gas and air enter the casing 700.
In general, the high-frequency high-voltage electrode 500 is mounted on an insulated electrode mounting base 510, and the high-frequency high-voltage electrode 500 is mounted on the furnace mouth through the electrode mounting base 510, thereby realizing the insulated and sealed mounting of the high-frequency high-voltage electrode 500 on the furnace mouth.
In a preferred embodiment, a ring magnet 900 is sleeved on the outside of the sleeve 700 and used for generating a magnetic field in the annular cavity to push the plasma forward and assist combustion.
In order to improve the heating efficiency of hot water, the central axis of the water jacket 400 outside the inclined furnace body 110 is offset upward relative to the central axis of the inclined furnace body 110 in a preferred embodiment, so that the lower water amount is less than the upper water amount.
Further, in order to increase the heat exchange area between the combustion gas and the water flow in the water flow jacket in the vertical furnace body 120, as shown in fig. 3, the vertical furnace body 120 is preferably configured to have a honeycomb structure, so that the honeycomb gaps (a plurality of circular gaps distributed in an array in fig. 3) of the heat exchange tubes 310 form the combustion gas flow channels of the vertical furnace body. The lower pipe orifice of the honeycomb-shaped gap of the heat exchange pipe 310 is communicated with the combustion gas flow channel of the inclined section furnace body 110, and the upper pipe orifice of the honeycomb-shaped gap of the heat exchange pipe 310 is communicated with the upward outer exhaust pipe 320.
Further, in order to reduce heat loss, it is preferable that the outside of the furnace body is wrapped with an insulating layer 800.
Generally, a temperature sensor 430 is installed on the water flow jacket 400, ammonia gas and air are respectively conveyed from a gas storage tank to an ammonia gas and air inlet through a pipeline, flow control valves are respectively arranged on the pipelines for introducing the ammonia gas and the air, an ammonia gas alarm 440 is arranged at a pipe orifice of an outer exhaust pipe, the temperature sensor 430, the ammonia gas alarm 440 (used for monitoring the ammonia gas concentration in exhaust gas), the flow control valves and a power supply 520 of the high-frequency high-voltage electrode 500 are controlled by a PLC, and hot water with a required temperature is obtained by adjusting power supply parameters of power supply of the high-frequency high-voltage electrode and the flow of the ammonia gas and the air through the PLC.
In one embodiment, the peak-to-peak voltage of the high-frequency high-voltage electrode 500 is 1-15kV, the power is 0.3-1kw, and the introduction flow rates of ammonia gas and air are 1-2m 3 H and 0.5-2m 3 H is used as the reference value. Within the working parameter range, the production efficiency of the ammonia plasma, the working stability of the high-frequency high-voltage electrode and the heating energy consumption can be considered, and the purpose of efficiently heating hot water is achieved.
As shown in FIG. 4, for the utility model provides a heating furnace's concrete implementation form based on ammonia burning, including a case shell, at the upper portion installation furnace body of case shell, distribution equipment such as lower part installation transformer. When the high-frequency high-voltage electrode is operated, the voltage of the power grid is connected, and the voltage with required frequency and power is obtained through the transformer to supply power to the high-frequency high-voltage electrode.
The utility model provides a heating furnace based on ammonia burning can be used to the heating water heating, also can be used to heat and obtain high-temperature water. In actual application, parameters such as the flow rate of water, heating time and the like are calculated according to the temperature difference.
After the heating furnace works stably, the main components of the gas discharged by the exhaust pipe are nitrogen and water vapor through detection, and the emission standard is met.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The above-mentioned specific embodiments can not be regarded as the restriction to the protection scope of the present invention, to the technical personnel in this technical field, it is right that any replacement improvement or transformation that the embodiment of the present invention made all fall within the protection scope of the utility model.
The parts of the present invention not described in detail are known to those skilled in the art.
Claims (8)
1. A hot water heating furnace based on ammonia combustion is characterized by comprising a furnace body made of metal, wherein the furnace body is grounded and comprises an inclined section furnace body and a vertical section furnace body which are mutually connected, the inner wall of the inclined section furnace body is obliquely and downwards arranged from a furnace opening to the connection part of the inclined section furnace body and the vertical section furnace body, and the lowest part of the inclined section furnace body is communicated with a drain pipe;
a combustion gas flow channel is formed in the furnace body, and a water flow jacket is formed on the side wall of the furnace body;
a columnar high-frequency high-voltage electrode is installed on the inner side of the furnace mouth of the inclined section furnace body in an insulating and sealing manner, and an annular cavity is formed between the high-frequency high-voltage electrode and the inner wall of the inclined section furnace body;
and an ammonia gas and air introducing hole communicated with the annular cavity is formed in the furnace mouth of the inclined section furnace body.
2. The ammonia combustion-based hot water heating furnace according to claim 1, wherein a sleeve made of metal is installed in the furnace mouth of the inclined section furnace body, the outer diameter of the sleeve is in clearance fit with the inner diameter of the inclined section furnace body, the front end port of the sleeve is hermetically welded with the furnace mouth of the inclined section furnace body, and a necking section is formed at the rear end of the sleeve so as to form a stepped annular cavity between the high-frequency high-voltage electrode and the sleeve; the high-frequency high-voltage electrode is connected with the front port of the sleeve through an insulating sealing element.
3. The ammonia gas combustion-based hot water heating furnace according to claim 1, wherein a central axis of the water flow jacket outside the inclined stage furnace body is offset upward with respect to a central axis of the inclined stage furnace body.
4. The ammonia gas combustion-based hot water heating furnace according to claim 1, wherein the ammonia gas and air introduction holes are opened in a tangential direction of a cross section of the furnace opening, and the respective ammonia gas and air introduction holes are uniformly arranged in a circumferential direction.
5. An ammonia combustion based hot water heating furnace according to claim 2, characterized in that the outside of the sleeve is sleeved with a ring magnet.
6. The ammonia combustion-based hot water heating furnace according to claim 1, wherein the combustion gas flow channel in the vertical section furnace body passes through a honeycomb-shaped heat exchange tube, a lower nozzle of a honeycomb-shaped gap of the heat exchange tube is communicated with the combustion gas flow channel of the inclined section furnace body, and an upper nozzle of the honeycomb-shaped gap of the heat exchange tube is communicated with an upward outer gas discharge tube.
7. The ammonia combustion-based hot water heating furnace according to claim 1, wherein the lower part and the upper part of the water flow jacket are respectively communicated with a water inlet pipe and a water outlet pipe.
8. The ammonia combustion-based hot water heating furnace according to claim 6, wherein the water flow jacket is provided with a temperature sensor, flow control valves are respectively arranged on pipelines for introducing ammonia gas and air, an ammonia gas alarm is arranged at a pipe orifice of the outer exhaust pipe, and power supplies of the temperature sensor, the ammonia gas alarm, the flow control valves and the high-frequency high-voltage electrode are controlled by a PLC (programmable logic controller).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222795852.7U CN218210063U (en) | 2022-10-24 | 2022-10-24 | Hot water heating furnace based on ammonia combustion |
| PCT/CN2022/140860 WO2024087365A1 (en) | 2022-10-24 | 2022-12-22 | Hot water heating furnace based on ammonia gas combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222795852.7U CN218210063U (en) | 2022-10-24 | 2022-10-24 | Hot water heating furnace based on ammonia combustion |
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| CN218210063U true CN218210063U (en) | 2023-01-03 |
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| CN202222795852.7U Active CN218210063U (en) | 2022-10-24 | 2022-10-24 | Hot water heating furnace based on ammonia combustion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087365A1 (en) * | 2022-10-24 | 2024-05-02 | 王守国 | Hot water heating furnace based on ammonia gas combustion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087365A1 (en) * | 2022-10-24 | 2024-05-02 | 王守国 | Hot water heating furnace based on ammonia gas combustion |
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