JPS6325405A - Electromagnetic 'pumpless' boiler - Google Patents

Abstract

PURPOSE:To make it possible to improve the combustion efficiency of the boiler and to save a fuel by stirring a combustible mixed gas from a first venturi part and a second venturi part and bringing atomized oil particles into collision with in candescent wire nets. CONSTITUTION:A combustible mixed gas higher than the upper limit of a combustion range prepared by mixing air and a fuel at a first venturi part 1 using combustion air is passed through preheating nets 4 formed by two incandescent wire nets of 500 meshes to preheat the combustible mixed gas to high temperatures. The combustible mixed gas together with a threefold furnace heating net 5 concurrently used as a speed reducing net and a mixing net, are burnt while passing through a furnace heating net 5 concurrently used as a speed reducing net and a mixing net. Thus, since the wire net is thus heated to incandescency, oil particles are reduced to half immediately when they come into collision with wire nets and are vaporized, and therefore have a property equivalent to that of a gaseous fuel. In conclusion, the gaseous fuel has a combustion speed at which combustion is finished instantaneously simultaneously with the ignition, if the mixing ratio of the gaseous fuel and air is within the combustion range. Hence, it is possible to approach the complete combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is mainly concerned with improving the combustion efficiency of small boilers such as domestic water heaters. Regarding equipment.

(Prior technology) As shown in attached Figure 2, conventional boilers simply spray fuel with an electromagnetic pump, and then send combustion air from behind using a blower to mix air and fuel after passing the tip of the Parnall tip. It is simply burned in the combustion tube (furnace) shown in Figure 2 of the attachment.

(Problem to be solved by the invention) For this reason, the mixing speed of fuel and combustion air is slow, making it difficult to achieve complete combustion, and the combustion reaction ends before complete combustion occurs. However, if you try to increase the air flow rate to increase the mixing speed, the fuel will be blown away and continuous combustion will not be possible, resulting in a misfire.

There are various ways to increase the combustion rate in combustion reactions, but with conventional combustion methods, the only way to do so is to send the combustion air faster.9 However, as mentioned above, there are limits to this.
In the case of kerosene, the calorific value is 1.1000 kcal/kg, but in the conventional combustion method, it is 5500 kcal/kg.
~7000kcal/kgL The present invention was created in order to eliminate the disadvantages of the conventional combustion method, which has a limit in increasing the combustion rate.It increases combustion efficiency and increases the amount of fuel. The aim is to provide efficient boilers that save money.

(Means for solving the problem) How to increase the combustion rate in a combustion device will lead to an increase in combustion efficiency, which will lead to fuel savings. This is especially true in small boilers where the volume of the combustion chamber is limited. Factors related to the combustion rate in the combustion reaction between fuel and air include the temperature of the combustion air,
Ignition temperature (the higher the ignition temperature when starting combustion, the wider the combustion range), the temperature of the flammable mixture, the size of the atomized fuel scum, the mixing speed and mixing time of the oil scum and combustion air, Examples include furnace temperature (radiant heat from the furnace wall and flame determines the ignition temperature in the combustion chamber), excess air volume, etc. The present invention is a combustion apparatus that utilizes and solves these factors as shown in FIG. 1 attached hereto.

(Function) The function of the mixture preheating tube and mixture preheating network is that if the combustion air is warmed before being mixed with fuel, it will burn better, but as the air expands and increases in volume, the air density decreases and the air weight decreases. decreases, moving away from more accurate complete combustion9
However, due to this physical phenomenon, even when combustion is performed with air at room temperature at each time of the year, the results are almost the same, and there is not much difference even if the combustion air is heated. Therefore, by mixing the fuel and combustion air and heating the mixture to form a mixture, the mixture is heated and combusted.By doing so, we are able to overcome the contradictions that have existed up until now: if the air is warmed, it will burn better, but its density will decrease and the weight of the air will decrease. This action eliminates the contradiction of not being able to take advantage of the warming effect, which deviates from complete combustion, and the result is the same whether heated or not. The moderating network function of the moderating network, mixing network, and in-furnace heating network is that in order to atomize fuel using the Venturi effect, the flow velocity of the air must be increased, but at its natural flow velocity, combustion will not occur. The flow rate of the flammable air-fuel mixture is reduced and the flammable air-fuel mixture from the first venturi section shown in Figure 1 of Attachment 1 and the second venturi section of Figure 2 of Attachment 1 is reduced. This increases the residence time in the furnace and brings it closer to complete combustion. As a mixing net, the oil sludge that is atomized and blown away by the venturi section collides with the fine woven lines of the wire mesh, thereby reducing the amount of oil sludge by half and doubling the contact area with the combustion air. However, the mixing speed with the combustion air is doubled and the mixing time is shortened to 1/2, but the advantage of -E is that the wire mesh is red-hot to a high temperature, so the oil scum is halved as soon as it collides with the wire mesh. And because it vaporizes, it has the same properties as gaseous fuel. In other words, if the mixture ratio with air is within the combustible range, gaseous fuel has a combustion speed that instantly ends combustion at the same time as ignition, so it can approach complete combustion. As for the in-furnace heating network, the combustion range of a flammable mixture becomes wider when the temperature of the ignition source at the time of ignition is high, and the ignition source for continuously burning combustion gas is transmission from the flame. By arranging a wire mesh inside the furnace that is always inside the flame and connected to the furnace wall, the radiant heat from the furnace wall and flame is raised, which burns the fuel and lowers the temperature inside the furnace. The factors that determine how high it can be raised are: 1. Type of fuel 2. Air ratio 3. Combustion efficiency 4. For fuel i? ;2 Air temperature 5, radiation from the flame 6, conduction from the furnace wall. By using 5 and 6, it is possible to maintain the high temperature inside the furnace and directly act on the flammable mixture. Maintaining the high temperature inside the furnace = expanding the combustion range = increasing the combustion speed A closer to complete combustion: 1-
leads to fuel savings. In addition, in actual combustion reactions, it is impossible to contact and burn combustible molecules due to the theoretical amount of air, so excess air is always required, but by keeping the temperature inside the furnace high, combustion can be achieved. Efficiency is improved, unnecessary excess air is not required, there is no loss in heating it, and combustion can be performed close to complete combustion with an air amount closer to the theoretical air amount.

(Example) An electromagnetic pumpless boiler with a cross-sectional shape shown in attached Figure 1.

In the above-mentioned embodiment, it was explained that the bench Cooley effect is used instead of the electromagnetic pump for atomizing the fuel, but depending on the viscosity of the fuel, the temperature, etc., an electromagnetic pump may be used for the IIJit mist of the fuel. .

In the embodiments previously mentioned, it has been explained that the first venturi section and the second venturi section use the same fuel, but they may use different fuels.

In the embodiments previously described, the Venturi effect is used for atomizing the fuel, but this may be used in combination with an electromagnetic pump.

(Effects of the Invention) The combustion method according to the present invention can omit the electromagnetic pump, which is a main component of the conventional combustion method, and the structure becomes much simpler. This results in fewer breakdowns and fuel savings.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the present invention. FIG. 2 is a cross-sectional view of a conventional combustion system. 1-...1st venturi section. 2...Second venturi section. 3...Mixture preheating tube. 4... Mixture preheating net 5... Speed reduction net, mixing net, and furnace heating net. 6...Fuel pipe. 7...Mixture preheating cable installation stay. 8... Stay for preheating cylinder installation. -Arrow: Combustion air sent from the blower. Fig. 2 1...Electromagnetic pump 92...Combustion cylinder (furnace). 3...Burner chip. −〉・・・Combustion air sent from the blower.

Claims (1)

[Claims] The venturi effect is created by using the combustion air required by the boiler itself when burning fuel, instead of using an electromagnetic pump as in the past for fuel spray, and by mixing air and fuel. The flammable air-fuel mixture, which is above the upper limit of the flammability range, is passed through a preheating mesh made of two red-hot 500 mesh wire meshes, and after being preheated to a high temperature, it passes through the second venturi shown in Attachment 1, Figure 2. The mixture is combusted as it passes through the triple speed reduction network/mixing network/in-furnace heating network shown in Figure 5 of Attachment 1 along with the mixture ejected from four air-fuel mixture jets installed at 90° angles in the section. A boiler characterized by: {Embodiment} The electromagnetic pumpless boiler was described as having two air-fuel mixture preheating nets and three speed reduction nets/mixing nets/furnace heating nets, but the number of air-fuel mixture preheating nets may range from 1 to 50 depending on the fuel used. Claim 1, characterized in that the speed reduction net, the mixing net, and the furnace heating net are used in combination in any number between 1 and 50. electromagnetic pumpless boiler. The aforementioned electromagnetic pumpless boiler was described as having four fuel injection ports at an angle of 90° in the second venturi section, but this patent is characterized in that the fuel injection ports can be selected at any value between 1 and 64 locations. An electromagnetic pumpless boiler according to claim 1. Previously, the electromagnetic pumpless boiler had a mixture preheating network of 50
2. The electromagnetic pumpless boiler according to claim 1, wherein, although the wire mesh has been described as 0 mesh, a wire mesh having an arbitrary value between 10 mesh and 1000 mesh may be selected and used depending on the fuel used.