KR101032832B1 - Combustion Method of Complete Combustion High Efficiency Hot Air Fan Using Liquefied Oxygen as Heat Source - Google Patents

Abstract

The present invention relates to a combustion method of a fully-combusted high-efficiency hot air blower using liquefied oxygen as a heat source, which can generate high temperature heat during combustion, thereby greatly increasing the heat efficiency of the hot air blower, thereby greatly reducing fuel costs. By using oxygen, it is possible to use the hot air fan comfortably in the room because it can be completely burned, and the combustion method of the fully-combustible high-efficiency hot air fan that uses liquefied oxygen, which is eco-friendly and high-efficiency, which can reduce fuel costs due to the high flame temperature will be.

The pure oxygen combustion method using the liquefied oxygen can be applied not only to agricultural, industrial hot air blowers that consume a lot of fuel, but also to households. In addition, the fuel used in the combustion method using pure liquefied oxygen is used in the case of using petroleum such as LNG, LPG and diesel, kerosene as fuel. When the fuel is combusted using oxygen as a heat source in the hot air fan, the ratio of pure oxygen mixed with the fuel is the most efficient at 65% by weight to 85% by weight, and the ratio of fuel mixed with pure oxygen is 15% by weight with 35% by weight. do. When the pure oxygen mixed with the fuel is more than 85% by weight, combustion is not smooth. When the pure oxygen is less than 65% by weight, the temperature of the flame does not occur high to the desired temperature and the fuel consumption is high, resulting in inefficiency.

The combustion method of the fuel using pure liquefied oxygen of the present invention can greatly increase the temperature of the flame to greatly increase the thermal efficiency of the hot air fan, and since pure oxygen is supplied sufficiently during combustion, it is completely burned, so there is no emission of environmental pollutants. It can provide a technology that can greatly improve the atmosphere environment.

LPG, LNG, liquefied oxygen, hot air fans, combustion, nozzles.

Description

A method of perfect combustion for high efficiency heat blower supplied pure oxygen as a heat source}

The present invention relates to a combustion method of a fully-combusted high-efficiency hot air blower using liquefied oxygen as a heat source in agricultural, industrial hot air blowers or domestic hot air blowers, and greatly increases the ratio of pure oxygen during combustion to completely burn fuel and increase thermal efficiency at high temperatures. The present invention relates to a combustion method of a complete combustion high efficiency hot air blower using liquefied oxygen as a heat source that can significantly reduce fuel costs.

The present invention provides a combustion apparatus and a method of mixing liquefied oxygen and fuel that vaporize pure liquefied oxygen when the fuel is burned in a hot air fan, mix the fuel with a predetermined ratio, and supply it to the combustion device of the hot air fan for combustion.

Hot air blower is used not only for agriculture and industrial use but also for heating in home or public places, and the types of hot air blower include perfusion hot air blower, flue-type hot air blower and water pipe hot air blower. The perfusion fan is divided into a steam fan, a hot water fan, and a vacuum fan. Associative hot air blower is gas burning hot air blower, oil burning hot air blower, gas and oil burning hot air blower, hot water hot air blower, and it has the advantage of being easy to install in a narrow space. There is a hot air fan and it is used for power generation etc. in the medium size or more. Gas heat blowers that are frequently used for home heating are natural, forced, and forced exhaust fan. Natural or forced exhaust fan requires a dedicated hot air chamber, but forced exhaust can be installed regardless of location. .

The fuel of the hot air fan is usually using diesel or gas, and the fuel cost of the hot air fan has been greatly increased due to the recent surge in oil prices, and various alternatives for reducing the fuel cost of the hot air fan have been proposed. In order to solve the fuel cost of such a hot air blower, the present invention has developed a fuel mixing method and a hot air blower combustion apparatus using pure liquefied oxygen as a heat source that has dramatically improved thermal efficiency. In Korean Patent No. 10-0886568 developed by the present inventor, a method for mixing fuel gas and a boiler using pure oxygen has been developed, but in the registered patent, the ratio of pure oxygen mixed with fuel is 15 to 38%. Although a method of mixing is disclosed, the mixing of pure oxygen in the above ratio has a problem that the heat efficiency of the hot air blower is low and the heat efficiency is not high, so the fuel saving effect is not large. Therefore, in the present invention, in order to increase the efficiency of the hot air fan, a combustion method and a hot air air combustion device using pure oxygen contained in liquefied oxygen communication as a heat source were developed. By doubling the amount, we have developed a technology that uses oxygen as a heat source to drastically reduce fuel consumption and greatly improve the flame temperature of a hot fan.

In addition, the present invention relates to a method and apparatus for supplying oxygen to a hot air blower, and a zeolite filling layer is formed in the air supply portion of the hot air blower to pass air through this layer to provide high quality oxygen. The technique to make is described. That is, the method of supplying oxygen to the hot air blower is made to supply oxygen generated by passing air through the zeolite filling layer to the burner. The air supplied to the hot air blower forcibly supplies air to the zeolite filling layer or passes the air sucked by the suction force of the blower fan through the zeolite filling layer. It must be configured additionally. In addition, the conventional technology relates to an oxygen supply device that increases the content of oxygen in the air supplied to the hot air blower by partially filtering nitrogen in the air, which is essentially different from the technology of burning fuel using pure oxygen as a heat source. In addition, the conventional technology cannot improve the thermal efficiency, and there is a problem in that the air environment due to the combustion exhaust gas is polluted.

In addition, as the international oil prices and energy prices soared recently, the fuel cost burden of the hot air blower is greatly increased in each home and industry using the hot air blower, and various technologies for reducing the heat are being developed.

And due to the excessive use of fossil fuels, environmental pollution has emerged as an important issue for human survival.

Therefore, the large heat blower, which is an energy-consuming facility that mainly uses fossil energy, is basically required for the optimal design of the facility in order to reduce energy costs and reduce environmental pollution. In high temperature heat facilities such as hot air blowers, environmental pollutants such as nitrogen oxides (NOx) or pollutants caused by incomplete urea are discharged. Therefore, a technique for lowering them needs to be applied. However, in the prior art, the high temperature of the hot air fan is limited due to excessive fuel consumption, and the emission of environmental pollutants such as nitrogen oxides, hydrocarbons, and carbon monoxide is severe.

In addition, the cost of pure liquefied oxygen can be supplied inexpensively and stably, while the fuel of the hot air is high due to soaring international oil prices and natural gas prices. This is desperate.

In order to solve the problems described above, the present invention is to burn the liquid liquefied oxygen when the fuel used in the hot air is combusted and mixed with the fuel, and injected into the combustion chamber through the nozzle of the mixed gas pipe to burn, LPG, LNG and diesel The ratio of petroleum fuel, such as kerosene and kerosene, to pure oxygen is mixed with 15 to 35% by weight of fuel and 65 to 85% by weight of pure oxygen, which reduces fuel consumption by about 20% compared to a conventional hot air blower. An object of the present invention is to provide a combustion method of a fully-combusted high-efficiency hot air fan using liquefied oxygen as a heat source.

In order to solve the above problems, when the fuel used in the hot air is combusted, pure liquefied oxygen is vaporized, mixed with the fuel, and injected into the combustion chamber through the nozzle of the mixed gas pipe to combust. At this time, the fuel of the hot air fan is LPG, LNG and petroleum such as diesel and kerosene. As such, the ratio of fuel and pure oxygen, which is used to dramatically increase the efficiency of the hot air fan, is used by mixing 15 to 35% by weight of fuel to 65 to 85% by weight of pure oxygen. When pure liquefied oxygen is mixed with the fuel at the same ratio as described above, the consumption of fuel is reduced by about 20% compared to a conventional hot air fan, thereby greatly reducing fuel costs. In particular, while the cost of pure liquefied oxygen can be supplied inexpensively and stably, the fuel of the hot air blower can significantly reduce the hot air fuel cost with the present invention as described above in a situation where the price of the hot air blower is high due to a surge in international oil prices and natural gas prices. Will be.

The present invention is a combustion hot air blower that uses pure oxygen to vaporize pure liquefied oxygen, and the fuel is completely burned and burned at a high temperature because the fuel and pure oxygen are mixed and combusted. In other words, as the ratio of the liquefied oxygen mixed with the fuel increases, the temperature of the flame at the time of combustion is much higher than that of the conventional hot air fan, and thus the heat efficiency of the hot air fan can be improved and fuel cost can be greatly reduced. As a result of the use, the fuel cost of the hot fan is reduced by about 20% compared to the fuel cost of the conventional hot fan even if the sum of pure liquefied oxygen costs.

In addition, since the combustion of fuel using pure liquefied oxygen does not generate air pollutants such as hydrocarbon (HC) or nitrogen oxide (NOx) generated by incomplete combustion when burning with air, the atmospheric environment is greatly improved. . Pure liquefied oxygen is easy to handle because it is not flammable and there is no risk of explosion during storage and transportation.

On the other hand, the hot air fan combustion method using sorghum gas or brown gas has a problem in that the cost of equipment is high because the facilities of the hot air fan are complicated and the combustion facilities must be made in a large size. The fuel combustion method using pure liquefied oxygen as a heat source of the present invention can easily install a facility in a relatively narrow space, thereby lowering the installation cost. In addition, since the storage tank of pure liquefied oxygen has a large capacity, it can be easily transported and stored because it is stored in a large capacity at a time.

According to the present invention, the pure liquefied oxygen of the liquefied acid container 15 is mixed with the fuel of the fuel container 16, and the pure oxygen fuel mixed gas is injected into the hot fan combustion chamber and combusted. When the mixed gas is combusted in the combustion chamber, the flame temperature can increase the combustion temperature by increasing the ratio of pure oxygen in the mixed gas.The combustion temperature is increased without additional consumption of fuel. Can be lowered. Hereinafter, a fuel combustion method of a high-efficiency hot air fan using pure liquefied oxygen, which is a preferred embodiment of the present invention, will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an exemplary embodiment showing a flowchart in which a mixed gas in which pure oxygen of a liquefied oxygen container and a fuel of a fuel container are mixed and injected into a combustion chamber of a hot air blower for implementing a preferred embodiment of the fuel combustion method of the present invention is burned.

The pure liquefied oxygen supplied to the hot air fan combustion chamber of the present invention is stored in the liquid oxygen container 15 in a liquid state, and when the hot air fan is operated, it is mixed with the fuel of the fuel container 16 at a predetermined ratio and injected into the hot air combustion chamber. More specifically, the liquefied oxygen of the liquefied oxygen container 15 is vaporized in the vaporizer 12, uniformly adjusted while passing through the oxygen regulator 11 and the oxygen flow control valve 9 to the fuel container 16 The fuel amount of the fuel container is also uniformly controlled by the fuel regulator 10 and the fuel flow control valve 8, and the fuel is uniformly mixed with the vaporized pure oxygen. The pure oxygen fuel mixed gas is injected into the combustion chamber of the hot fan to burn at a high temperature. The pure oxygen mixed with the fuel is adjusted to a range of 65 to 85 wt% to control the temperature of the flame, and the content of pure oxygen mixed in the fuel. As this increases, the flame temperature rises and the thermal efficiency increases. Conventionally, the flame of a hot fan is burned at a temperature of about 700 to 1000 ° C., but the pure oxygen fuel mixed gas combustion method using oxygen as a heat source by vaporizing pure liquefied oxygen of the present invention raises the flame temperature of a hot fan combustion chamber to 3000 to 3500 ° C. This can dramatically increase the thermal efficiency of the hot air fan without additional fuel consumption. LPG, LNG and petroleum such as kerosene and kerosene are used as the hot air fuel used in the present invention, and it is not limited to the fuel if it can be burned by using a combustion device of the hot air fan.

When the ratio of pure oxygen of the pure oxygen fuel mixed gas combusted in a hot air fan is 85 wt% or more, the proportion of fuel in the mixed gas is reduced, resulting in poor ignition and combustion of the flame, and the proportion of pure oxygen less than 65 wt% In this case, the ratio of fuel mixed with pure oxygen is too high, causing ignition irregularities and excessive fuel consumption.

Therefore, when the liquefied oxygen in the liquefied oxygen container is vaporized and the ratio of oxygen mixed with the fuel in the fuel container is in the range of 65 to 85% by weight and the fuel ratio is 15 to 35% by weight, the spark ignition is good and the thermal efficiency is the best. good.

The present invention relates to a pure oxygen fuel mixed gas combustion method and a hot air fan using pure liquefied oxygen as a heat source. LPG, LNG and petroleum such as kerosene and diesel are used as the hot air fuel for combustion using pure liquefied oxygen. In this embodiment, LPG is mixed with pure liquefied oxygen and burned in a hot air combustion chamber. The pure liquefied oxygen vaporizes the liquefied oxygen of the liquefied oxygen vessel 15 in a vaporizer to uniformly regulate the amount of pure oxygen through the oxygen regulator 11 and the oxygen flow control valve 9, and then passes the fuel through the oxygen flashback arrestor 7. Mixed with LPG in the vessel.

The LPG of the fuel container 16 is uniformly regulated through the fuel regulator 10 and the fuel flow control valve 8, and the amount of LPG is mixed with pure oxygen through the fuel flashback arrester 6 and injected into the combustion chamber of the hot air blower. It becomes When the pure oxygen fuel mixed gas is injected through the nozzle in the combustion chamber, the mixed gas is burned at a high temperature due to the ignition of the ignition plug 3, and the flame ignited by the nozzle is suppressed by the heat dissipation cap 2. On the opposite side of the heat dissipation cap, a blower 4 is installed to generate hot air while the fan of the blower 4 rotates when the mixed gas is burned.

Commercially available LPG gas is composed of propane (C3H8) 60-80%, butane (C4H10) 15-30%, and ethane (C2H6) 5%. have.

The composition of LPG used as a hot fan fuel is composed of propane 70%, butane 25% and ethane 5%. The gas and calorific value generated when the LPG fuel is burned with pure oxygen are as follows. That is, propane, butane, and ethane, which are LPG, have structural formulas of carbon (C) and hydrogen (H), and the quantitative relations with the reaction formulas during combustion are as follows.

C + O ₂ → CO ₂ + 97200 kcal / kmol

12kg 32kg 44kg

H ₂ + (1/2) O ₂ → H ₂ 0 + 68 400 kcal / kmol

Ethane (C ₂ H ₆ ) in the composition of LPG exothermic reaction, the reaction formula is as follows.

C ₂ H ₆ + 3 (1/2) O ₂ → 2CO ₂ + 3H ₂ O

Propane (C ₃ H ₈ ) in the composition of LPG also exothermic reaction as follows, 12000gcal heat is generated in 1Kg propane.

C ₃ H ₈ + ₅ O ₂ → ₃ CO ₂ + 4H ₂ O

Butane (C ₄ H ₁₀ ) in the composition of LPG exothermic reaction as follows, the heat generated is 11800kcal in 1Kg of butane is generated.

C ₄ H ₁₀ + 6 (1/2) O ₂ → 4 CO ₂ + 5H ₂ O

The commercially available LPG canister weighs 20kg, of which 70% propane, 25% butane and 5% ethane is propane at 14Kg, butane at 5Kg and ethane at 1Kg. . Since the proper amount of pure oxygen mixed with LPG used as a hot air fuel is 65 to 85% by weight, pure oxygen of about 37 Kg to 113 Kg is required to completely burn 20 kg of commercially available LPG. Even more preferably, 60 to 80 kg of pure oxygen is required, and in order to increase the heat efficiency of the hot air fan, when the ratio of pure oxygen mixed with fuel is increased, the combustion temperature becomes high and the temperature rises up to 3500 ° C.

When the LPG gas is completely burned using pure oxygen in the liquefied oxygen container 15, NOx is theoretically not emitted. In addition, ethane (C ₂ H ₆ ), propane (C ₃ H ₈ ), and butane (C ₄ H ₁₀ ), which are components of LPG gas, are completely combusted with CO ₂ and water together with an exothermic reaction, and thus, substantially no pollutants are emitted. For example, the pure oxygen fuel mixed gas combustion type hot air blower can greatly increase thermal efficiency while reducing fuel consumption.

In the above embodiment, only when LPG gas is used as a hot air fuel, but LNG, diesel, and kerosene can be used by completely burning at high temperature using liquefied oxygen, and thus can be used without difficulty in changing equipment. Therefore, the present invention does not limit the type of fuel.

The present invention relates to a pure oxygen fuel mixed gas combustion method using pure oxygen as a heat source for increasing the flame temperature of a hot air blower combustion chamber by increasing the flame temperature of a hot air blower combustion chamber by mixing pure oxygen with fuel for combustion. In the present invention, the pure oxygen mixed with the LPG gas is provided with a separate liquefied oxygen container (15) to receive pure oxygen from it, mixed with fuel and injected into the hot air combustion chamber to burn.

Oxygen supplied to the hot air fan combustion chamber stores the industrially produced pure oxygen in a liquid state in the liquefied oxygen container 15, vaporizes it, mixes it with fuel, and sprays it in the hot air fan combustion chamber. The pure oxygen supplied from the liquefied oxygen container 15 mixed with the LPG gas starts to combust when the LPG is 15% or more in the mixed gas when mixed with the LPG, and adjusts the temperature of the flame with the supply amount of pure oxygen. When the mixed gas is first injected from the nozzle 1 through the nozzle 1, the mixed gas is ignited by the spark of the ignition plug 3, and after the flame is ignited in the hot air combustion chamber, the pure oxygen fuel mixed gas is continuously injected from the mixed gas pipe 5 and combusted. Will be. At this time, the pure oxygen fuel mixed gas is mixed in a ratio of 15 to 35% by weight of LPG gas to 65 to 85% by weight of pure oxygen. In order to obtain a uniform pure oxygen fuel mixture gas, the pure oxygen of the liquefied oxygen container 15 is introduced into the vaporizer 12 and vaporized, and then the amount of oxygen is uniformly controlled by the oxygen regulator 11 and the oxygen flow control valve 9. It is mixed with LPG gas in the mixed gas pipe. At the same time, the LPG of the fuel container 16 is uniformly regulated in the flow rate of the fuel regulator 10 and the fuel flow control valve 8, mixed with the pure oxygen in the mixed gas pipe 5, and injected into the combustion chamber of the hot air blower. . At this time, the pure oxygen fuel mixed gas injected into the hot fan combustion chamber uses oxygen as a heat source even though the fuel consumption is low, and burns with a high temperature flame, and the higher the pure oxygen ratio of the mixed gas, the higher the flame temperature is. Is increased. The flame temperature of a conventional hot air blower is about 700 to 1000 ° C., but a hot air blower using pure oxygen as a heat source of the present invention can raise the flame temperature of the combustion chamber to 3500 ° C., thus maintaining the hot air combustion chamber temperature at 3000 to 3500 ° C. for additional fuel. It is possible to dramatically increase the thermal efficiency of the hot air fan without wasting.

The pure oxygen fuel mixed gas combustion method using pure liquefied oxygen as a heat source of the present invention can not only significantly increase the thermal efficiency but also completely burn fuel using pure oxygen, such as nitrogen oxides (NOx) and hydrocarbons (HC). It can fundamentally block the generation of pollutants. In addition, the high heat efficiency of the fuel can reduce the fuel consumption of the hot air fan by 20%, there is an advantage that can be installed relatively simply the combustion device of the hot air fan.

1 is a flow chart in which a mixed gas in which pure oxygen of a liquefied oxygen container and a fuel of a fuel container are mixed into a hot air combustion chamber is burned to perform a preferred embodiment of the fuel combustion method of the present invention.

<Description of the symbols for the main parts of the drawings>

1: nozzle 2: heat dissipation cap

3: spark plug 4: blower

5: Mixed Gas Pipeline 6: Fuel Flashback Arrestor

7: Oxygen Flashback Arrestor 8: Fuel Flow Control Valve

9: oxygen flow control valve 10: fuel regulator

11: oxygen regulator 12: vaporizer

13: oxygen pressure gauge 14: fuel pressure gauge

15: liquefied oxygen container 16: fuel container

Claims (3)

A pure oxygen fuel mixed gas combustion method of a hot air fan, comprising: uniformly adjusting pure oxygen in a liquefied oxygen container through an oxygen regulator and an oxygen flow control valve; And uniformly adjusting the fuel amount through the fuel regulator and the fuel flow control valve of the fuel in the fuel container. And the uniformly regulated oxygen is introduced into the mixed gas pipe through the oxygen flashback arrestor, and the uniformly regulated fuel is introduced into the mixed gas pipe through the fuel flashback arrestor to mix pure oxygen and fuel in the mixed gas pipe. And injecting the pure oxygen fuel mixed gas mixed at the ratio of 65 to 85% by weight of pure oxygen and 15 to 35% of the fuel in the mixing step of the pure oxygen and the fuel through a nozzle to the hot fan combustion chamber. And the mixed gas injected through the nozzle is combusted while emitting a high temperature flame of 3000 ° C. to 3500 ° C. by ignition of the spark plug. And the flame ignited by the mixed gas of the nozzle is blocked by the heat dissipation cap. And a blower installed at one side of the combustion chamber so as to emit hot air with high temperature by the wind of the blower. The method of claim 1, wherein the fuel mixed with pure oxygen of the pure oxygen fuel mixed gas is LNG, LPG, light oil or kerosene. [3] The complete gas comprising liquefied oxygen as a heat source according to claim 1 or 2, wherein a mixed gas of LPG 20 Kg and pure oxygen 37 Kg to 113 Kg is injected into a hot air combustion chamber and combusted at a high temperature of 3000 to 3500 ° C. Combustion method of combustion high efficiency hot fan.

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