Liquid fuel furnace capable of reducing heat dissipation loss

Abstract

The invention discloses a liquid fuel furnace capable of reducing heat dissipation loss, which comprises a furnace end with a gradually-expanded throat part, a combustor, an electric pulse igniter, an air feeder and a pipeline, an air inlet is arranged on the straight wall of the outer side of an outer hearth with a bottom edge and is in butt joint with an outlet of the air feeder, and a hole is arranged in the center of the bottom and is connected with inner and outer teeth of the throat part. The outer diameter of the uppermost edge of the divergent burner is smaller than the inner diameter of the uppermost edge of the outer hearth, and the inner diameter of the lowermost edge of the divergent burner is sleeved on the outer side of the throat part. Therefore, the divergent furnace end is just embedded in the outside hearth, and a cavity is formed between the divergent furnace end and the outside hearth. The combustor is at the throat position, the airflow speed is fastest, the pressure is minimum, and air is entrained and sucked for mixed combustion. And the air feeder is started to feed air into the cavity. The heat of flames is radiated to the divergent furnace end, the divergent furnace end conducts heat into the cavity, air scours the cavity, the heat is absorbed to improve the air temperature, hot air flows back into the divergent furnace end through the small holes in the furnace end and participates in flame combustion, the wall temperature of the outermost hearth is reduced, and therefore the purpose of reducing heat dissipation loss is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of combustion equipment, in particular to a liquid combustion furnace with reduced heat dissipation loss. Background Art

[0002] During the combustion process, fuel can release a large amount of chemical heat. People use the chemical heat released to heat food, etc. However, as long as there is a temperature difference, there will be heat dissipation loss. For example, high calorific value liquid fuel releases a large amount of heat during the combustion process. Due to the temperature difference with the surrounding temperature, there will be heat dissipation loss. In order to improve energy utilization efficiency and reduce thermal pollution, heat dissipation loss must be reduced.

[0003] Invention patent content

[0004] The purpose of the present invention is to provide a liquid fuel stove with reduced heat dissipation loss. To achieve the above purpose, the present invention provides a scheme as follows: it contains a gradually contracting and gradually expanding burner head, the gradually contracting throat portion is the lower section, the gradually expanding burner head is the upper section, an outer furnace with a bottom edge, a liquid fuel burner, an electric pulse igniter, a blower, and a pipeline. An air inlet is provided on the outer straight wall of the outer furnace with a bottom edge and is connected to the blower outlet. Three circles of upward ventilation holes are drilled on the gradually expanding burner head. There is a liquid fuel burner at the throat portion, and a hole is provided at the center of the bottom of the outer furnace with a bottom edge. The hole is matched with the outer diameter of the throat portion by male and female threads, so that they are connected into a whole. The hole is an inner thread, and the gradually contracting throat portion is an outer thread. The outer diameter of the uppermost side of the gradually expanding burner head is smaller than the inner diameter of the uppermost side of the outer furnace chamber, which is used as an upper fixing point. The inner diameter of the lowermost side of the gradually expanding burner head is clamped on the outer diameter of the throat portion as a lower fixing point. Therefore, the gradually expanding burner head is just embedded in the inner part of the outer furnace chamber, and a cavity is formed between them.

[0005] The present invention has the following advantages

[0006] 1. Taking advantage of the fastest flow rate and lowest pressure at the tapered throat, a large amount of air is squeezed in and sucked in under the action of atmospheric pressure, and participates in the combustion of fuel to reduce the air supply and reduce the power consumption of the blower.

[0007] 2. Utilize the upward ventilation holes on the gradually expanding burner head. Under the action of the blower, a lot of air passes through the upward ventilation holes. Such air flow can drive a lot of outside air through the throat part. As long as the diameter of the throat part is large enough, a large amount of air will be sucked in, which can reduce the air supply of the blower and further reduce the power consumption of the blower.

[0008] 3. The small ventilation holes pointing vertically upward on the gradually expanding furnace head can not only play the role of ventilation, but also prevent the flame from leaking out from this small hole to reduce the loss of scattered light.

[0009] 4. The liquid fuel burner is installed in the throat of the convergent section. The intense burning flame in the liquid fuel burner occurs in the gradually expanding burner head. The flame quickly bakes the gradually expanding burner head red through heat radiation. The red burner head has an extremely high temperature difference with the environment, so a large amount of heat is lost. Fortunately, there is an outer furnace with a bottom on the outside, and the outer furnace with a bottom can reduce the heat dissipation.

[0010] 5. Since the outer wall of the outer furnace with a bottom is a vertical wall, and the gradually expanding furnace head is embedded in its inner side, there is a large enough cavity between them to act as a heat insulator. Then, the outer furnace with a bottom is connected to the outlet of the blower through an air inlet. In this way, a large amount of wind sent in by the blower will flush the cavity, and then pass through the small upward through hole to enter the gradually expanding furnace head to participate in the combustion of the flame. Due to the flow of air and gas, it brings a large amount of heat back to the gradually expanding furnace head. This process further reduces the wall temperature of the outermost layer of the outer furnace with a bottom, reduces the temperature difference, and naturally reduces the heat dissipation loss.

[0011] 6. Since the flow of air carries a large amount of heat and enters the gradually expanding burner, it naturally increases the temperature inside the burner, that is, increases the temperature of the ignition and combustion zone of the liquid fuel, which is beneficial to the combustion effect of the liquid fuel and reduces the chemical incomplete loss of the liquid fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the present embodiment are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Attached Figure 1 The present invention is a schematic structural diagram of a liquid fuel furnace capable of reducing heat dissipation losses.

[0014] 1. Burner 2. Throat part 3. Central hole at the bottom of the outer furnace with bottom edge 4. Upward ventilation hole 5. Electric pulse ignition needle 6. Gradually expanding burner head 7. Vertical wall of the outer furnace with bottom 8. An air inlet 9. Cavity 10. Blower outlet 11. Internal and external teeth between the central hole and the gradually contracting throat. DETAILED DESCRIPTION

[0015] This embodiment provides a liquid combustion furnace for reducing heat dissipation loss. As shown in the figure, it includes a burner 1, a throat part 2, a central hole 3 at the bottom center of the outer furnace chamber with a bottom edge, upward ventilation small holes 4, an electric pulse ignition needle 5, a gradually expanding furnace head 6, a vertical wall 7 of the outer furnace chamber with a bottom, an air intake port 8, a cavity body 9, a blower outlet 10, and internal and external threads 11 between the central hole and the gradually narrowing throat.

[0016] When the liquid fuel is atomized and flows to the position of the electric pulse ignition needle, it is ignited by the electric spark started. Since the burner is at the throat part, and the air flow velocity at the throat part is the fastest and the pressure at other places is the smallest, a large amount of air is pressed in under the action of atmospheric pressure. Under the entrainment effect of the air flow, it is mixed with the liquid fuel flow and participates in combustion. Turn on the blower. The blower outlet is docked with an air intake port on the vertical wall of the outer furnace chamber with a bottom edge through a pipeline, and the air sent by the blower is sent into the cavity body between the inner side of the outer furnace chamber with a bottom and the outer side of the gradually expanding furnace head. The flowing wind energy absorbs a large amount of heat conducted from the gradually expanding furnace head and carries the absorbed large amount of heat. Then, through the upward ventilation small holes, the heat and air flow back to the inner part of the gradually expanding furnace head again, which effectively increases the temperature of the ignition and combustion area inside the gradually expanding furnace head and is also beneficial to the combustion of the liquid fuel. At the same time, it also directly participates in the combustion of the liquid fuel, so it is convenient for the liquid fuel to burn completely. At the same time, since the flowing blower air can carry away a large amount of heat in time, the temperature of the outer side wall of the outer furnace chamber with a bottom edge is reduced, and thus the heat dissipation loss is also reduced, achieving the purpose of this patent.

[0017] In Solution 2, the upward small holes can also be changed to other directions, such as the normal direction of the flame front surface.

[0018] In Solution 3, the upward small holes can also be changed to a direction at an angle of 60° with the horizontal.

Claims

1. A liquid fuel stove for reducing heat dissipation loss, comprising a gradually contracting and gradually expanding burner head, the gradually contracting part including the throat is the lower section, the gradually expanding burner head is the upper section, an outer furnace with a bottom edge, a liquid fuel burner, a blower, a pipeline, an air inlet on the outer straight wall of the outer furnace with a bottom edge and connected to the blower outlet, three circles of upward ventilation holes are drilled on the gradually expanding burner head, a liquid fuel burner is arranged at the throat, the outermost outer diameter of the gradually expanding burner head is smaller than the inner diameter of the uppermost outer furnace, and serves as an upper fixing point, and is characterized in that: There is a hole in the center of the bottom of the outer furnace with a bottom edge, which is matched with the outer diameter of the throat part through male and female threads to connect them into a whole. The hole is the inner thread, and the tapered throat part is the outer thread. The diameter of this outer thread is smaller than the inner diameter of the lowest side of the gradually expanding furnace head. This lowest inner diameter is sleeved on the outside of the outer thread diameter as the lower fixed point.

2. The liquid combustion furnace for reducing heat dissipation loss according to claim 1, wherein: The gradually expanding burner head is drilled with three circles of upward ventilation holes.

3. A liquid combustion furnace for reducing heat dissipation loss according to claim 1, characterized in that: There is a hole in the center of the bottom of the outer furnace with a bottom edge, which is matched with the inner and outer teeth of the tapered throat to form a whole, the hole side is the inner teeth and the tapered throat is the outer teeth.

4. A liquid combustion furnace for reducing heat dissipation loss according to claim 1, characterized in that: The inner diameter of the uppermost side of the vertical wall of the outer furnace with the bottom edge is slightly larger than the outer diameter of the uppermost side of the gradually expanding furnace head, and the inner diameter clamps the outer diameter as the upper fixing point.

5. The liquid fuel furnace for reducing heat dissipation loss according to claim 1, characterized in that: The inner diameter of the bottom of the gradually expanding burner head is larger than the outer diameter of the throat. The bottom of the gradually expanding burner head covers the outer side of the throat and serves as a fixing point at the bottom.

6. A liquid combustion furnace for reducing heat dissipation loss according to claim 3 or 4, characterized in that: The gradually expanding furnace head is embedded in the inner part of the outer furnace.

7. The liquid combustion furnace for reducing heat dissipation loss according to claim 1, wherein: There is an interface on the vertical wall of the outer furnace with a bottom edge, which is connected to the outlet of the blower through a pipeline. When the blower is started, a large amount of wind can be used to reduce the temperature difference, increase the temperature of the ignition and combustion zone, and participate in combustion.

8. A liquid combustion furnace for reducing heat dissipation loss according to claim 1, characterized in that: It has a magnetic needle for electric pulse ignition installed in the burner head, which can emit electric sparks and ignite mist-like liquid fuel under high voltage.

9. A liquid combustion furnace for reducing heat dissipation loss according to claim 1, characterized in that: A liquid fuel burner is installed in the tapered throat, which can turn the liquid fuel into an atomized state and turn it into a burning flame under the ignition of an electric spark. The flow of the liquid atomized fluid in the throat can draw in external air and participate in the combustion.

10. A liquid combustion furnace for reducing heat dissipation loss according to claim 1, characterized in that: The wind delivered by the blower first absorbs the heat in the cavity, increasing its own wind temperature, while lowering the temperature of the vertical wall of the outer furnace, reducing heat dissipation losses. The hot air then passes through the small holes into the ignition and combustion zone of the gradually expanding burner head, increasing the temperature of the ignition and combustion zone, which is beneficial to the complete combustion of the liquid fuel and participates in the combustion.

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