A dual-oil-circuit combustion device for high thermal power liquid fuel combustion

Abstract

This utility model discloses a dual-oil-circuit combustion device for high-thermal-power liquid fuel combustion, comprising a base plate, a combined combustion chamber mounted on the base plate, and an air chamber mounted on the bottom of the base plate. The air chamber has an air cavity. At least two oil inlet components are fixed to the bottom of the base plate and located within the air cavity of the air chamber. The combined combustion chamber includes a combustion cylinder and an air inlet duct located inside the combustion cylinder. The bottom of the combustion cylinder and the bottom of the air inlet duct are sealed together by a bottom connecting plate, forming a combustion chamber between the combustion cylinders. The oil inlet holes of all oil inlet components communicate with the combustion chamber. This utility model employs at least two oil inlet components distributed around the circumference of the combustion chamber, each igniting oil. Under the influence of the airflow from the air inlet duct and the metal vaporization mesh, the liquid fuel and air are fully mixed and fully combusted. The high-temperature environment allows the liquid fuel to vaporize rapidly, making it suitable for high-thermal-power liquid fuel combustion.

Description

Technical Field

[0001] This utility model relates to the field of combustion stove accessories, and in particular to a dual oil circuit combustion device for high-heat-power liquid fuel combustion. Background Technology

[0002] A combustion device is a burner in a stove that converts fuel into heat energy. Gas stoves use natural gas as fuel and are devices for burning gaseous fuels. They are not suitable for burning liquid fuels, which are also important forms of fuel, such as diesel, kerosene, and coal-based liquid fuels. Coal-based liquid fuels are extracted from coal through direct liquefaction or indirect liquefaction technologies (such as Fischer-Tropsch synthesis). Coal-based liquid fuels will become an important fuel for industrial or commercial stoves in the future. In industrial or commercial combustion devices, high thermal power requirements are necessary, such as 15KW or 30KW, or even 50KW depending on actual needs. Here, 1 KW represents the amount of heat released by the combustion stove per second (1 kilojoule (kJ)). Therefore, the combustion stove requires a larger flow rate of liquid fuel to ensure the maximum heat demand of the high-power combustion stove, while also taking into account the combustion needs when the high-power combustion stove is at low flame. How to ensure that the large flow rate of liquid fuel is fully and evenly combusted in the combustion device is a technical problem that needs to be solved. If the combustion is incomplete, it will reduce the fuel utilization rate and also produce more dense smoke (which contains unburned substances or gases, such as carbon monoxide), causing damage to the surrounding environment. Utility Model Content

[0003] The purpose of this invention is to solve the problem of high thermal power liquid fuel combustion and to provide a dual-oil-circuit combustion device for high thermal power liquid fuel combustion. Each oil inlet component is evenly connected and distributed on the combustion chamber, so that liquid fuel is evenly introduced into the combustion chamber from all directions and ignited separately. At the same time, the air inlet cavity of the air inlet duct gathers the airflow and delivers it evenly to the combustion chamber through each air slot. Under the guidance of the airflow disturbance, the liquid fuel can fill the entire combustion chamber and be fully mixed and burned in the combustion chamber.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A dual-oil-circuit combustion device for high thermal power liquid fuel combustion includes a base plate, a combined combustion chamber mounted on the base plate, and an air chamber mounted on the bottom of the base plate. The air chamber has an air cavity and an air inlet corresponding to the air cavity. At least two oil inlet components are fixed to the bottom of the base plate and located in the air cavity of the air chamber. The combined combustion chamber includes a combustion cylinder and an air inlet duct located inside the combustion cylinder. The bottom of the combustion cylinder and the bottom of the air inlet duct are sealed and connected by a bottom connecting plate, forming a combustion chamber between the combustion cylinder and the air inlet duct. The oil inlet holes of all oil inlet components communicate with the combustion chamber.

[0006] To better realize this utility model, two oil inlet components are symmetrically fixed at the bottom of the base plate, and the oil inlet holes of the two oil inlet components are arranged on both sides of the combustion chamber.

[0007] Preferably, the fuel inlet assembly includes a fuel inlet ignition channel body, a fuel inlet sleeve is connected to the side of the fuel inlet ignition channel body, a fuel inlet pipe is sealed inside the fuel inlet sleeve, the port of the fuel inlet pipe passes through the fuel inlet ignition channel body and is positioned at the fuel inlet hole, an igniter is installed at the end of the fuel inlet ignition channel body, the ignition end of the igniter passes through the fuel inlet ignition channel body and is placed in the combustion chamber, and an air inlet located in the air chamber of the air chamber body is also connected to the side of the fuel inlet ignition channel body.

[0008] Preferably, a fan is installed at the air inlet of the air cavity.

[0009] Preferably, the air inlet duct has an air inlet cavity, the bottom of the air inlet duct is an air inlet port communicating with the air inlet cavity, the top of the air inlet duct is closed by a top plate, and the side wall of the air inlet duct has several air slots that connect the air inlet cavity of the air inlet duct with the combustion chamber.

[0010] Preferably, a metal vaporization mesh is attached to the inner wall of the combustion cylinder, and the metal vaporization mesh has a mesh structure.

[0011] Preferably, the bottom connecting plate of the combined combustion chamber is provided with an annular groove.

[0012] Preferably, the air chamber of the air cavity is provided with an air guide vane assembly, which is fixed to the bottom connecting plate of the combined combustion chamber by screws. The air guide vane assembly consists of a plurality of arc-shaped air guide vanes.

[0013] Preferably, all the arc-shaped air guide vanes of the air guide vane assembly are distributed in a circular pattern, the center of the air guide vane assembly is the main air outlet, and all the arc-shaped air guide vanes of the air guide vane assembly are distributed in a clockwise or counterclockwise arc shape to guide the airflow.

[0014] Preferably, the combined combustion chamber is further provided with a flameout protection probe with a temperature sensor; the top of the combined combustion chamber is also equipped with a flame-gathering device and / or a multi-stage combustion chamber with a flame-gathering device.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0016] (1) In this utility model, each oil inlet component is evenly connected and distributed on the combustion chamber, so that liquid fuel is evenly introduced into the combustion chamber from all directions and ignited separately. At the same time, the air inlet cavity of the air inlet duct gathers the airflow and delivers it evenly to the combustion chamber through each air slot. Under the guidance of the airflow disturbance, the liquid fuel can fill the entire combustion chamber and be fully mixed and burned in the combustion chamber. Since the combustion chamber generates a high temperature environment, the water mist liquid fuel or liquid fuel that enters later will be rapidly vaporized in the high temperature environment, which will be more conducive to being fully mixed and fully burned in the combustion chamber, thus improving the combustion efficiency of the liquid fuel.

[0017] (2) The blower of this utility model draws in air into the air cavity, and most of the air enters the air inlet. The arc-shaped air guides inside the air cavity guide the air to move counterclockwise. Part of the counterclockwise air enters the air inlet and promotes the air inside the air inlet to move counterclockwise. The other part of the counterclockwise air forms a vortex on the outer edge of the arc-shaped air guide. The vortex will enter the air inlet of the oil inlet assembly to guide the liquid fuel at the oil inlet hole.

[0018] (3) The inner wall of the combustion tube of this utility model is attached with a metal vaporization mesh. Part of the liquid fuel free in the combustion chamber is attached to the metal vaporization mesh and burned. The metal vaporization mesh can vaporize the liquid fuel quickly and also make the combustion flame and energy evenly distributed inside the combustion chamber.

[0019] (4) This utility model is an innovative combustion device specifically designed for high thermal power liquid fuel combustion. It adopts at least two oil inlet components distributed on the circumference of the combustion chamber and ignites oil separately. Under the action of the airflow from the air inlet and the metal vaporization mesh, the liquid fuel is evenly distributed in the combustion chamber. The liquid fuel is fully mixed and fully combusted with the air. The high temperature environment in the combustion chamber allows the liquid fuel to vaporize rapidly, which is conducive to mixing and combustion, and improves the combustion efficiency of the liquid fuel. It is suitable for high thermal power liquid fuel combustion. Attached Figure Description

[0020] Figure 1 This is a side view of the dual-oil-circuit combustion device in the embodiment;

[0021] Figure 2 for Figure 1 A structural diagram viewed from below after removing the air chamber and fan;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure with corresponding arc-shaped air guide vanes arranged in a circular pattern;

[0023] Figure 4 for Figure 1 A top-down structural diagram;

[0024] Figure 5 for Figure 2 A structural schematic diagram from a side view;

[0025] Figure 6 for Figure 2 A schematic diagram of the structure from a top-down perspective.

[0026] The names corresponding to the reference numerals in the attached figures are as follows:

[0027] 1-Base plate, 2-Combustion cylinder, 3-Air inlet duct, 31-Air duct, 4-Air chamber body, 5-Fan, 6-Combustion chamber, 7-Fuel inlet assembly, 71-Fuel inlet pipe sleeve, 72-Fuel inlet ignition channel body, 721-Air inlet, 73-Fuel inlet hole, 8-Arc-shaped air guide vane, 9-Gap space. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments:

[0029] Example

[0030] like Figure 1 , Figure 2 and Figures 4-6 As shown, a dual-oil-circuit combustion device for high-thermal-power liquid fuel combustion includes a base plate 1, a combined combustion chamber mounted on top of the base plate 1, and an air chamber 4 mounted on the bottom of the base plate 1. The air chamber 4 has an air cavity, and an air inlet corresponding to the air cavity is opened on the air chamber 4. Preferably, a fan 5 is installed at the air inlet of the air chamber 4, and the fan 5 introduces external air into the air cavity through the air inlet. At least two oil inlet assemblies 7 are fixed to the bottom of the base plate 1 and located in the air cavity of the air chamber 4. See also Figure 2 In this preferred embodiment, two oil inlet components 7 are symmetrically fixed at the bottom of the base plate 1, and the oil inlet holes 73 of the two oil inlet components 7 are symmetrically arranged on both sides of the combustion chamber 6.

[0031] The combined combustion chamber includes a combustion cylinder 2 and an air inlet duct 3 located inside the combustion cylinder 2. The bottom of the combustion cylinder 2 and the bottom of the air inlet duct 3 are sealed together by a bottom connecting plate. This sealing of the bottom of the combined combustion chamber and the top opening for flame and heat collection to heat the bottom of the pot body located above the combined combustion chamber. A combustion chamber 6 is formed between the combustion cylinder 2 and the air inlet duct 3. Water mist liquid fuel or liquid fuel introduced by the fuel inlet assembly 7 is burned and vaporized in the combustion chamber 6 (the heat generated by combustion vaporizes the water mist liquid fuel or liquid fuel, making it easier to mix and burn, thus enhancing combustion efficiency). All fuel inlet holes 73 of the fuel inlet assembly 7 are connected to the combustion chamber 6, and the fuel inlet assembly 7 delivers liquid fuel to the combustion chamber 6 through the fuel inlet holes 73. Preferably, in this embodiment, a flameout protection probe with a temperature sensor is also provided in the combined combustion chamber 6. The flameout protection probe is placed inside the combustion chamber 6 to detect the temperature. The top of the combined combustion chamber is also equipped with a flame-concentrating device, which directly concentrates heat on the bottom of the upper pot body; or the top of the combined combustion chamber is equipped with a multi-stage combustion cylinder with a flame-concentrating device, meaning the top of the combined combustion chamber is also connected to multiple stages of combustion for sequential combustion, and then the flame-concentrating device is used for concentrated heating. In this embodiment, the base plate 1 can be recessed into a partially enclosed cavity bottom plate facing the air cavity 4, thus the base plate 1 has a recessed sidewall, such as... Figure 4 As shown, there is a gap space 9 between the outer wall of the combustion cylinder 2 and the recessed side wall of the base plate 1. The gap space 9 serves to isolate heat transfer. Preferably, the gap space 9 can be filled with heat insulation material.

[0032] In this embodiment, the fuel inlet assembly 7 includes a fuel inlet ignition channel body 72. A fuel inlet sleeve 71 is connected to the side of the fuel inlet ignition channel body 72. A fuel inlet pipe is sealed inside the fuel inlet sleeve 71 (preferably, one end of the fuel inlet pipe is connected to a fuel tank, and a pulse fuel pump is installed on the fuel inlet pipe; the pulse fuel pump continuously pumps out water mist liquid fuel or liquid fuel in a pulse manner, and the water mist liquid fuel or liquid fuel enters the combustion chamber 6 through the fuel inlet pipe and the fuel inlet hole 73). The inlet of the fuel inlet pipe passes through the fuel inlet ignition channel body 72 and is positioned corresponding to the fuel inlet hole 73. An igniter is installed at the end of the fuel inlet ignition channel body 72, and the ignition end of the igniter passes through the fuel inlet ignition channel body 72 and is positioned in the combustion chamber 6, with the ignition end of the igniter corresponding to the dense liquid fuel area of ​​the fuel inlet hole 73. Figure 6 As shown, the side of the oil inlet ignition channel body 72 is also connected to an air inlet 721 located in the air chamber of the air chamber body 4. The air inlet 721 is located in the air chamber of the air chamber body 4. The air inside the air chamber body 4 enters the oil inlet ignition channel body 72 through the air inlet 721 and is discharged from the oil inlet hole 73, forming an airflow that guides the oil inlet.

[0033] like Figure 2 , Figure 4 As shown, the air inlet duct 3 has an air inlet cavity, the bottom of the air inlet duct 3 is an air inlet port communicating with the air inlet cavity, the top of the air inlet duct 3 is closed by a top plate, and the side wall of the air inlet duct 3 has several air slots 31 along the height direction, and the length of each air slot 31 may be different (see...). Figure 2 The air duct 31 connects the air inlet cavity of the air inlet duct 3 to the combustion chamber 6. The air inside the air cavity 4 enters through the air inlet and gathers in the air inlet cavity of the air inlet duct 3. The high-pressure airflow in the air inlet cavity of the air inlet duct 3 is evenly distributed and transported to the combustion chamber 6 through each air duct 31. The fuel inlet pipes of the two fuel inlet components 7 enter the water mist liquid fuel through the fuel inlet hole 73 and are ignited by the igniter. Under the action of the high-pressure airflow, the water mist liquid fuel in the combustion chamber 6 is evenly dispersed from the two fuel inlet holes 73 in the combustion chamber 6. At the same time, the water mist liquid fuel is fully mixed with the air (containing oxygen) in the high-pressure airflow. In this way, the liquid fuel can fill the entire combustion chamber 6 and be fully mixed and burned in the combustion chamber 6. Because the combustion chamber 6 generates a high-temperature environment, the subsequently input water mist liquid fuel or liquid fuel will rapidly vaporize in the high-temperature environment, which will be more conducive to full mixing and full combustion in the combustion chamber 6, thus improving the combustion efficiency of the liquid fuel.

[0034] In some embodiments, a metal vaporization mesh is attached to the inner wall of the combustion chamber 2. The metal vaporization mesh has a mesh structure. In this embodiment, the preferred metal vaporization mesh is made of metal fibers through non-woven laying, stacking and high-temperature sintering, such as stainless steel sintered felt. The metal vaporization mesh has a three-dimensional mesh structure, high porosity, large surface area and uniform pore size distribution. A portion of the liquid fuel free in the combustion chamber 6 adheres to the metal vaporization mesh and burns (as the flame climbs on the metal vaporization mesh and ignites the entire metal vaporization mesh). The metal vaporization mesh can rapidly vaporize the liquid fuel and also allow the combustion flame and energy to be evenly distributed inside the combustion chamber 6.

[0035] In some embodiments, the bottom connecting plate of the combined combustion chamber is provided with an annular groove. See below. Figure 4 The annular groove is located in the combustion chamber 6 near the outside of the air inlet duct 3 and is arranged in a ring around the outside of the air inlet duct 3. When combustion stops or the flame goes out, the cooled liquid fuel will be stored in the annular groove. During the next combustion, the liquid fuel in the annular groove will vaporize under high temperature and participate in the combustion operation.

[0036] In some embodiments, such as Figure 3As shown, the air chamber of the air cavity 4 is equipped with an air guide vane assembly. The air guide vane assembly is fixed to the bottom connecting plate of the combined combustion chamber by screws. The air guide vane assembly consists of several arc-shaped air guide vanes 8. All the arc-shaped air guide vanes 8 of the air guide vane assembly are circumferentially distributed, with the center of the air guide vane assembly being the main air inlet. All the arc-shaped air guide vanes 8 of the air guide vane assembly are distributed in a clockwise or counterclockwise arc shape to guide the airflow (see...). Figure 3 All the arc-shaped air guide vanes 8 are arranged in a counterclockwise arc shape to guide the airflow. The fan 5 draws in airflow into the air chamber 4, and most of the airflow enters the air inlet duct 3. Inside the air chamber 4, each arc-shaped air guide vane 8 guides the airflow to move counterclockwise. Part of the counterclockwise airflow enters the air inlet duct 3 and causes the air inside the air inlet duct 3 to move counterclockwise. The other part of the counterclockwise airflow forms a vortex on the outer edge of the arc-shaped air guide vane 8. The vortex then enters the air inlet 721 of the oil inlet assembly 7 to guide liquid fuel at the oil inlet hole 73.

[0037] When in use, the blower 5 draws in airflow into the air chamber 4, and most of the airflow enters the air inlet duct 3. Inside the air chamber 4, the various arc-shaped air guide vanes 8 guide the airflow to move counterclockwise. Part of the counterclockwise airflow enters the air inlet duct 3 and causes the airflow inside the air inlet duct 3 to move counterclockwise. The other part of the counterclockwise airflow forms a vortex on the outer edge of the arc-shaped air guide vanes 8. The vortex then enters the air inlet 721 of the oil inlet assembly 7 to guide liquid fuel at the oil inlet hole 73. The air inside the air chamber 4 enters through the air inlet and gathers in the air inlet cavity of the air inlet 3. The high-pressure airflow in the air inlet cavity of the air inlet 3 is evenly distributed and delivered to the combustion chamber 6 through each air slot 31. The fuel inlet pipes of the two fuel inlet components 7 enter the water mist liquid fuel through the fuel inlet hole 73 and are ignited by the igniter. Under the action of the high-pressure airflow, the water mist liquid fuel in the combustion chamber 6 is evenly dispersed from the two fuel inlet holes 73 in the combustion chamber 6. At the same time, the water mist liquid fuel is fully mixed with the air (containing oxygen) in the high-pressure airflow. In this way, the liquid fuel can fill the entire combustion chamber 6 and be fully mixed and burned in the combustion chamber 6. Due to the high temperature environment generated in the combustion chamber 6, the water mist liquid fuel or liquid fuel that enters later will be rapidly vaporized in the high temperature environment, which will be more conducive to full mixing and full combustion in the combustion chamber 6, thus improving the combustion efficiency of the liquid fuel. A portion of the liquid fuel free in the combustion chamber 6 adheres to the metal vaporization mesh and burns (as the flame climbs up the metal vaporization mesh and ignites the entire metal vaporization mesh), the metal vaporization mesh enables the liquid fuel to vaporize rapidly, and also allows the combustion flame and energy to be evenly distributed inside the combustion chamber 6.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual oil path combustion device for large heat power liquid fuel combustion, characterized by: The system includes a base plate, a combined combustion chamber mounted on the base plate, and an air chamber mounted on the bottom of the base plate. The air chamber has an air cavity and an air inlet corresponding to the air cavity. At least two fuel inlet assemblies are fixed to the bottom of the base plate and located within the air cavity of the air chamber. The combined combustion chamber includes a combustion cylinder and an air inlet duct located inside the combustion cylinder. The bottom of the combustion cylinder and the bottom of the air inlet duct are sealed together by a bottom connecting plate, forming a combustion chamber between the combustion cylinder and the air inlet duct. The fuel inlet holes of all fuel inlet assemblies communicate with the combustion chamber.

2. The dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 1, characterized in that: Two oil inlet components are symmetrically fixed at the bottom of the base plate, and the oil inlet holes of the two oil inlet components are arranged on both sides of the combustion chamber.

3. A dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 1 or 2, characterized in that: The fuel inlet assembly includes a fuel inlet ignition channel body, a fuel inlet sleeve connected to the side of the fuel inlet ignition channel body, a fuel inlet pipe sealed inside the fuel inlet sleeve, the port of the fuel inlet pipe passing through the fuel inlet ignition channel body and correspondingly positioned at the fuel inlet hole, an igniter installed at the end of the fuel inlet ignition channel body, the ignition end of the igniter passing through the fuel inlet ignition channel body and positioned in the combustion chamber, and an air inlet located in the air chamber of the air chamber body is also connected to the side of the fuel inlet ignition channel body.

4. A dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 1 or 2, characterized in that: A fan is installed at the air inlet of the air cavity.

5. A dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 1, characterized in that: The air inlet duct has an air inlet cavity, the bottom of the air inlet duct is an air inlet port that communicates with the air inlet cavity, the top of the air inlet duct is closed by a top plate, and the side wall of the air inlet duct has several air slots that connect the air inlet cavity of the air inlet duct with the combustion chamber.

6. A dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 1, characterized in that: The inner wall of the combustion cylinder is fitted with a metal vaporization mesh, which has a mesh structure.

7. A dual-oil-circuit combustion device for high-thermal-power liquid fuel combustion according to claim 1, characterized in that: The bottom connecting plate of the combined combustion chamber is provided with an annular groove.

8. A dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 1, characterized in that: The air chamber of the air cavity is provided with an air guide vane assembly, which is fixed to the bottom connecting plate of the combined combustion chamber by screws. The air guide vane assembly is composed of several arc-shaped air guide vanes.

9. A dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 8, characterized in that: All the arc-shaped air guide vanes of the air guide vane assembly are distributed in a circular pattern, with the center of the air guide vane assembly being the main air inlet. All the arc-shaped air guide vanes of the air guide vane assembly are distributed in a clockwise or counterclockwise arc shape to guide the airflow.

10. A dual-oil-circuit combustion device for high thermal power liquid fuel combustion according to claim 1, characterized in that: The combined combustion chamber is also equipped with a flameout protection probe with a temperature sensor; the top of the combined combustion chamber is also equipped with a flame-gathering device and / or a multi-stage combustion cylinder with a flame-gathering device.

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