CN110986037A - Method for improving boiler combustion thermal efficiency by adopting light energy conversion - Google Patents

Method for improving boiler combustion thermal efficiency by adopting light energy conversion Download PDF

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Publication number
CN110986037A
CN110986037A CN201911330011.5A CN201911330011A CN110986037A CN 110986037 A CN110986037 A CN 110986037A CN 201911330011 A CN201911330011 A CN 201911330011A CN 110986037 A CN110986037 A CN 110986037A
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flame
combustion
light
boiler
temperature
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张学昌
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12Radiant burners
    • F23D14/14Radiant burners using screens or perforated plates

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

A method for improving the combustion heat efficiency of a boiler by adopting light energy conversion relates to a method for improving the combustion efficiency of a boiler. The invention solves the problems of low thermal efficiency and incapability of fully exerting the thermal energy efficiency of the existing oil-gas furnace. The method comprises the following steps: firstly, the method comprises the following steps: designing and installing a spectrum conversion piece; II, secondly: igniting the furnace by using a combustion head of a full-automatic ignition device; thirdly, the method comprises the following steps: firstly: the conversion piece is burnt by blue flame and then turns into orange metal flame light; secondly, the method comprises the following steps: the flame radiation wave of the red flame and the orange light has different wavelength than that of the blue light, and the temperature of the hearth can be continuously increased under the action of high temperature and radiation. If the fuel supply amount before transformation is adopted, the heat efficiency can be improved by more than 10 percent, and the original heat efficiency combustion mode is broken, so that the purposes of energy conservation, emission reduction and efficiency improvement in a real sense are realized. Fourthly, the method comprises the following steps: reducing the fuel supply amount; fifthly: and finishing the set combustion requirement and extinguishing the flame. The invention is used for improving the combustion efficiency of various furnaces and boilers.

Description

Method for improving boiler combustion thermal efficiency by adopting light energy conversion
Technical Field
The invention relates to a method for improving the combustion efficiency of a boiler, in particular to a method for improving the combustion thermal efficiency of the boiler by adopting light energy conversion. Aiming at improving the thermal efficiency of various fuel gases, fuel oil, various combustion flame nozzles and boilers, comprising petrochemical industry, oil refining cracking equipment and energy conversion devices, the spectral conversion is carried out on the fuel gas, the fuel oil, the various combustion flame nozzles and the boilers.
Background
In the current times of large energy consumption, particularly in the boiler industry and the petrochemical industry, the current thermal efficiency is 95-98%. It is very difficult to improve the efficiency index by one percent. In the petrochemical industry, the energy consumption is a huge cost input when the refining output value is required to be increased, and a furnace needs to burn a huge amount of fuel cost. Daily, monthly and annual costs are also a huge expense. If we can save 3% -5% of the cost expenditure, it is a considerable energy-saving figure.
In actual work and observation of various burners, it was found that most of the flames of oil burners, gas burners, were blue flames. From the spectral color of the flame, the temperature of the flame in the blue flame kernel is high (generally reaching about 1700 degrees). The biggest defects are that the wavelength of the spectral radiation is short, the outer flame temperature of the blue luminescence flame is low (the outer flame is as high as about 1300 ℃), and the heat transfer is less to the outside radiation. The wavelength of blue light is 423 nm at most when viewed from the spectrum transmission and the radiation wavelength, and the blue light is a cold light source, the radiation wave light wave generated is influenced, and the flame energy radiation transmission is also influenced, so that the heat efficiency generated in the combustion process is low, and the energy efficiency cannot be fully converted, released and utilized.
In summary, the existing gas stove has the problems that the flame is blue cold light, the radiation wave is short, the temperature is low, the heat efficiency is low, and the energy efficiency cannot be fully exerted.
Disclosure of Invention
The present invention relates to a technical improvement for improving the combustion heat efficiency of boiler by making the flame sprayed by fire nozzle of various oil-fired furnaces and gas-fired furnaces be blue flame. Namely, the light-common color conversion device is additionally arranged behind the flame nozzle of the boiler, so that the color of flame light is changed, the length of light waves is converted, the heat efficiency of the boiler is improved, and the aims of energy conservation, efficiency improvement, emission reduction and enterprise efficiency improvement are fulfilled.
The technical scheme of the invention is as follows: a method for improving the combustion efficiency of a boiler comprises the following steps:
the method comprises the following steps: design and installation of the spectral conversion part:
a mesh enclosure made of a tungsten metal mesh with the diameter larger than that of the flame nozzle by 10mm is used as a spectrum conversion part, and the spectrum conversion part is arranged at the position of a non-pressure part in the boiler in a three-point fixing mode and is arranged coaxially with the flame spraying direction in the same direction;
step two: igniting the furnace with a combustion head of a full-automatic ignition device:
adjusting the air intake and the fuel quantity, reducing the supply of fuel oil or fuel gas according to the data of the equipment and meters and various indexes, and adjusting to the optimal effect;
step three: the combustion process in the furnace:
firstly: the blue flame sprayed by the flame spraying nozzle burns a conversion piece made of a tungsten metal material, and then the spectrum conversion piece burns red, and at the moment, the blue flame becomes red metal flame light;
secondly, the method comprises the following steps: with the continuous rise of the flame temperature, part of the color of the spectrum conversion piece is gradually transited to orange flame light;
and thirdly: the flame radiation wave of orange light is longer than that of red light, and the temperature of a hearth can be continuously increased under the action of high temperature and radiation;
step four: the fuel supply amount is reduced, the temperature in the furnace is adjusted and the furnace is continuously combusted, the original heat efficiency can be kept, and the fuel is saved by more than 10-15%;
step five: when the boiler needs to be overhauled and shut down or the set combustion requirement is finished, the boiler is shut down.
Further, the mesh enclosure in the first step is a cone-shaped mesh enclosure.
Further, the mesh enclosure is a cone-shaped mesh enclosure with a contraction ratio of the large end to the small end of 5%.
Further, the large-end portion of the barrel net is 10mm larger in diameter than the burner.
Further, the length of the barrel net is 5-6 cm shorter than the length of the burner.
Further, the radiation wavelength of the red flame and the radiation wavelength of the orange flame on the spectral conversion member in the third step are more than 200-300 nm of the radiation wavelength of the blue flame.
Furthermore, the radiation wavelength of the high-temperature red flame waves and the orange flame in the third step is 1 to 1.5 times higher, the radiation distance is long, the generated heat is naturally converted and improved, the temperature in the hearth is over 1000 ℃ during blue flame, the temperature of the hearth is improved to over 1300 ℃ during orange flame, and the temperature of the hearth is improved by 30 percent
Compared with the prior art, the invention has the following effects:
1. in order to improve the combustion heat energy efficiency of the boiler, the invention adopts the color conversion of the combustion flame of the nozzle and the color conversion of the spectrum, and simultaneously changes the length of the light wave.
Specifically, the spectral radiation is changed, blue light is converted into red flame light and orange flame light through the spectral conversion part, the spectral color is converted into the change of spectral energy, and then a high-temperature cold light source is converted into a high-temperature hot light source, so that the remote radiation effect of red or orange light is improved, and the thermal efficiency of plasma is also improved.
2. The spectrum conversion of the invention is a natural phenomenon released by energy wave conversion which is generated by conversion of blue to orange-red wave levels of different spectrum radiation waves and is generated by conversion of energy in different wave bands. When the spectral radiant wave is converted from short wave to long wave, the heat energy of the light is also increased and changed from low to high, and the process of secondary conversion combustion is changed. The spectrum converter is a passive tungsten wire fire net barrel woven by a tungsten wire mesh. The cost is only thousands of yuan, the installation is convenient, the material consumption is less, the processing is easy, the cost is low, the return benefit is high, the generated heat benefit is tens of times of the input cost or more than hundreds of times of the input cost, and the energy-saving return can achieve very good social benefit.
3. In practical use, the invention takes the use condition of a red light boiler CWNS normal-pressure oil and gas hot water boiler as an example, the original technical parameters are that the thermal efficiency of the boiler is 92%, the thermal efficiency is improved to more than 102% after the light-to-normal converter is used, meanwhile, the fuel is saved by 10%, the thermal efficiency is improved by more than 10%, the flame is subjected to secondary combustion light conversion, the combustion is more sufficient, the emission of harmful gas is greatly reduced, therefore, the volume of the boiler can be improved and reduced in the future furnace body manufacturing, the boiler can be changed from horizontal to vertical, and the thermal efficiency can be better improved.
4. Under the condition of the same fuel and the same outlet flow, the heat efficiency can be improved by more than 10 percent, the energy can be saved by more than 10 percent, and the pollution discharge is reduced. The invention utilizes the light spectrum conversion, saves energy, improves efficiency and reduces emission, utilizes the natural effect of light energy conversion generated by different energy waves generated by different light energy radiation wave bands of a cold light source and a hot light source, and can also generate unexpected effect in improving the combustion efficiency of fuel in a hearth.
Drawings
Fig. 1 is a schematic structural view of a spectrum converter, and fig. 2 is a schematic mounting view of a triangular bracket of a spectrum converter.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 2, and includes the following steps:
the method comprises the following steps: design and installation of the spectral conversion part:
a mesh enclosure made of a tungsten metal mesh with the diameter larger than that of the flame nozzle by 10mm is used as a spectrum conversion part, and the spectrum conversion part is arranged at the position of a non-pressure part in the boiler in a three-point fixing mode and is arranged coaxially with the flame spraying direction in the same direction;
step two: igniting the furnace with a combustion head of a full-automatic ignition device:
adjusting the air intake and the fuel quantity, reducing the supply of fuel oil or fuel gas according to the data of the equipment and meters and various indexes, and adjusting to the optimal effect; under the condition of reducing the adjustment of the supply quantity of fuel oil or fuel gas, the temperature of a hearth can be increased under the action of heat radiation, and the action and the effect of heat efficiency are improved;
step three: the combustion process in the furnace:
firstly: the blue flame sprayed by the flame spraying nozzle burns a conversion piece made of a tungsten metal material, and then the spectrum conversion piece burns red, and at the moment, the blue flame becomes red metal flame light;
secondly, the method comprises the following steps: with the continuous rise of the flame temperature, part of the color of the spectrum conversion piece is gradually transited to orange flame light; the heat radiation effect is improved;
and thirdly: the flame radiation wave of orange light is longer than that of red light, and the temperature of a hearth can be continuously increased under the action of high temperature and radiation; meanwhile, the heat efficiency is greatly improved;
step four: the fuel supply amount is reduced, the temperature in the furnace is adjusted and the combustion is continued, the heat efficiency can be improved, the original heat efficiency can be kept, and the fuel can be saved by more than 10-15%;
step five: when the boiler needs to be overhauled and shut down or the set combustion requirement is finished, the boiler is shut down.
The tungsten wire of the embodiment has the characteristics of high temperature resistance, ageing resistance and long service life. Tungsten wires and tungsten sheets processed by tungsten gold can have good physical phenomena of red light, orange light and incandescent light under the action of electric heat and an electric light source, and a plurality of devices, heat source parts and light sources are processed and used by tungsten metal materials. The tungsten filament or the tungsten sheet can generate infrared light and far infrared light under high temperature generated by different currents, and can generate strong external radiation and heat conduction effects. The work flow of switching from one stop to another can be realized by not millions.
The three-point fixing mode is adopted for the upper part and the lower part of the spectrum conversion part in the first step, which mainly means that three brackets 100 are adopted for installing and fixing the spectrum conversion part.
Support 100 adopts stainless steel, and thickness is 4mm, support demountable installation, and the fixed point is at boiler main part steel frame construction welding, can not with pressure furnace body welded mounting. The spectral conversion member was mounted 10mm from the burner.
The second embodiment is as follows: referring to fig. 1 to 2, the mesh enclosure in the first step of the present embodiment is a tapered mesh enclosure. So configured, to facilitate engagement with the torch tip 110. The rest of the description is the same as the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 1 and 2, and the mesh enclosure of the present embodiment has a shrinkage ratio of 5% between the large end and the small end of the truncated cone-shaped mesh enclosure. With reference to fig. 1, wherein D1 represents a 10mm diameter nozzle; d2 represents a 5% reduction in diameter by D1; l is designed to be shorter than 50 mm according to the flame color spraying length of different furnace types; the tungsten wire mesh is made of high-quality material, the diameter of the tungsten wire is preferably 0.5-1.0mm, and the mesh density of the tungsten wire mesh is 3-5 mm. The tungsten filament barrel should be installed on the non-pressure structural component by using a high temperature resistant steel bracket according to the sizes of different furnace types. Welding to any part of the pressure vessel is absolutely not allowed, and the installation must be firm in order to connect with a nut which is easy to disassemble and replace. The rest is the same as in the first or second embodiment. Meanwhile, graphene materials are adopted as the possible use is developed.
The fourth concrete implementation mode: the present embodiment will be described with reference to fig. 1 and 2, and the diameter of the large end portion of the barrel net of the present embodiment is enlarged by 10mm from the diameter of the burner. When the nozzle is ignited, the diameter of the flame is 20 mm larger than that of the nozzle head, so that the flame in the middle layer of the flame is used for burning the tungsten wire mesh to reach the effect of the highest temperature. The other contents are the same as those of the first, second or third embodiments.
The fifth concrete implementation mode: the present embodiment is described with reference to fig. 2, and the length of the barrel net of the present embodiment is 5 to 6 cm shorter than the length of the burner. So set up, because blue light flame burns and hinders, add behind the tungsten filament net, increased the flow resistance increase that the net hinders, the fire hinders, flame length can shorten naturally. The other contents are the same as those of the first, second, third or fourth embodiments.
The sixth specific implementation mode: referring to fig. 1 to fig. 2, the radiation wave of the orange-red flame in the third step of the present embodiment is also 200 nm and 300 nm higher than the radiation wavelength of the blue flame, that is, the effect of improving the light energy conversion generated by the low-radiation flame through the plasma transfer combustion is obtained. This is because the wavelength of visible light is determined, and the wavelength of 633-746 nanometer orange flame light wave will have strong outward radiation effect, so there is a principle that the short-wave (cold light source) and long-wave (hot light source) have different short-wave band radiation effect, and the difference of the magnitude of the heat radiation effect is generated to naturally convert the physical effect. Like the principle of solar orange light radiating on the earth. The other contents are the same as those of the first, second, third, fourth or fifth embodiments.
The seventh embodiment: the embodiment is described with reference to fig. 1 to 2, in the third step of the embodiment, the radiation temperature of the high-temperature red flame wave and the orange flame is 1 to 1.5 times higher, the radiation distance is long, the generated heat is naturally converted and increased, the temperature in the hearth of the blue flame is above 1000 ℃, and the temperature in the hearth of the orange flame is increased to above 1300 ℃. I.e. exhibits high conversion effects of light spectrum energy.
The principle of the invention is as follows:
from the light spectrum wavelength, the blue flame is 423 nm, the flame is in a premixed combustion state in the hearth, the temperature of the hearth reaches over 1000 ℃, and the light spectrum of the red flame and the orange flame is between 633-746 nm, so that the temperature of the hearth reaches about 1300 ℃. The ordinary source of cold light becomes the heat light source, produces the heat-conduction effect of very strong remote radiant energy, has passed through after the secondary heating tungsten silk screen simultaneously again, and the insufficient problem of once burning has obtained the abundant burning of secondary and has recycled and the conversion, and then the heat source can be stronger, and is more stable, and the thermal efficiency can be higher. The temperature of the heating surface of the furnace body receiving heat radiation is higher, the produced energy-saving and efficiency-increasing effect can show a gorgeous turning high-temperature effect in the conversion of the blue flame and the orange flame, and the higher the temperature is, the more the energy outbreak and the heat energy promotion can be reflected, and the plasma energy of the conversion net can be fully exerted.
Firstly, a high-temperature-resistant and fatigue-resistant tungsten wire mesh is manufactured into a barrel-shaped mesh according to the length of a flame nozzle and the diameter of the flame nozzle, and the barrel-shaped mesh is fixedly installed and coaxially arranged in the same direction as flame. The blue flame that the bocca erupted just can be burnt the tungsten wire net evenly red, and the high half section of flame temperature can also burn orange, so, red flame, the radiant wave of the high temperature flame of orange flame is prolonged, produces the high temperature radiation effect simultaneously, and plasma flame combustion effect will be more high-efficient to can produce high temperature efficiency simultaneously.
The reason why the thermal efficiency is improved by converting the blue flame into the red flame and the orange flame is that the temperature of the flame is higher in the outer layer from the red flame to the orange flame, the radiation wave is more than 200-300 nm longer than that of the blue flame, and the radiation wave of the red flame and the orange flame can reach to 633-746 nm, so that the heated surface temperature is greatly improved. The temperature of the flame in the furnace chamber of the spectrum conversion is increased and changed in an integrated manner, the temperature of the furnace chamber is increased to a new height of more than 1300 ℃, so that the spectrum conversion is realized, the energy of the fuel with the same quality is fully exerted to a new concept and a new theoretical field of new physical change, and a new high-energy new flame state and high heat efficiency are converted.
When the blue light is converted into red and orange high-energy effect, about 50% of light energy and heat energy light are radiated downwards, in order to improve the heat energy effect, a high-temperature resistant energy reflection light common plate with the same length as the conversion part is additionally arranged at the bottom of the boiler, the high-temperature resistant energy reflection light common plate is radiated to the heating surface again, secondary air blowing is added below the radiation plate, the secondary air volume is improved, and the measure can improve the heat effect by about 5%. Because the temperature of the hearth is improved by more than 1300 ℃, the problem of high temperature overheating can be generated, the furnace body close to a fire source is subjected to overheating damage and service life loss, the reflector is adopted for high-temperature protection and protection, the damage effect of high-temperature heat is solved, the protection effect is also realized, and meanwhile, the heat energy reflected to the water-cooled wall can be better fully utilized and the heat efficiency is improved.
In the petrochemical industry, most of oil refining cracking devices are vertical and tower-type devices, and a device adopting a lower part combustion mode can generate very obvious different effects of energy conservation and efficiency improvement after transformation, thereby bringing great benefits for enterprises. By adopting the technology, the energy consumption can be saved in the future, and the reduction by more than 10 percent can be completely realized.

Claims (7)

1. A method for improving the combustion thermal efficiency of a boiler by adopting light energy conversion is characterized in that: it comprises the following steps:
the method comprises the following steps: design and installation of the spectral conversion part:
a mesh cover made of a tungsten metal material mesh with the diameter larger than that of the flame spray nozzle by 10mm is used as a spectrum conversion piece, and the spectrum conversion piece is arranged at the position of a non-pressure piece in the boiler in a three-point fixing mode and is coaxial and equidirectional with the flame spraying direction;
step two: igniting the furnace by using a flame nozzle combustion head of a full-automatic ignition device:
adjusting the air intake and the fuel quantity, reducing the supply quantity of fuel oil or fuel gas according to the data of equipment instruments and various indexes, and adjusting to the best effect;
step three: the combustion process in the furnace:
firstly: the blue flame sprayed by the flame spraying nozzle burns a conversion piece made of a tungsten metal material, and then the spectrum conversion piece burns red, and at the moment, the blue flame becomes red metal flame light;
secondly, the method comprises the following steps: with the continuous rise of the flame temperature, the partial color of the spectrum conversion piece is gradually transited to orange flame light and incandescent metal flame light;
and thirdly: the flame radiation wave of the orange light is longer than that of the blue light, and the temperature of the hearth can be continuously increased under the action of high temperature and radiation;
step four: the fuel supply amount is reduced, the temperature in the furnace is adjusted, and the combustion is continued;
step five: when the boiler needs to be overhauled and shut down or the set combustion requirement is finished, the boiler is shut down.
2. The method for improving the thermal efficiency of boiler combustion by light energy conversion as claimed in claim 1, wherein: the mesh enclosure in the first step is a cone-shaped mesh enclosure.
3. The method for improving the combustion thermal efficiency of the boiler by adopting the light energy conversion as claimed in claim 2, wherein: the shrinkage ratio of the big end and the small end of the screen which is in the shape of a truncated cone is 5 percent.
4. The method for improving the thermal efficiency of boiler combustion by light energy conversion as claimed in claim 3, wherein: the diameter of the large end of the barrel-shaped net is 10mm larger than that of the flame nozzle.
5. The method for improving the thermal efficiency of boiler combustion by light energy conversion as claimed in claim 4, wherein: the length of the barrel net is 5 cm shorter than the length of the burner.
6. The method for improving the thermal efficiency of boiler combustion by light energy conversion as claimed in claim 5, wherein: the radiation wavelength of the red flame and the radiation wavelength of the orange flame on the spectral conversion member in the third step are 200-300 nanometers longer than the radiation wavelength of the blue flame.
7. The method for improving the thermal efficiency of boiler combustion by light energy conversion as claimed in claim 6, wherein: the radiation wavelength of the high-temperature red flame waves and the orange flame in the third step is 1-1.5 times higher than that of the blue flame, the radiation distance is long, the generated heat is naturally converted and promoted, the temperature in the hearth of the blue flame is over 1000 ℃, and the temperature of the hearth of the orange flame is increased to over 1300 ℃.
CN201911330011.5A 2019-12-20 2019-12-20 Method for improving boiler combustion thermal efficiency by adopting light energy conversion Pending CN110986037A (en)

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Application publication date: 20200410