Energy-saving combustor with methanol as fuel and combustion system of energy-saving combustor

Abstract

The energy-saving combustor comprises a gun head cover, a gun core, an air pipeline and a methanol pipeline, the air pipeline is arranged on the periphery of the methanol pipeline in a sleeving mode, air and methanol enter the air pipeline and the methanol pipeline through an air inlet and a methanol inlet respectively, and the methanol enters the air pipeline and the methanol pipeline through an air inlet and a methanol inlet respectively. The low-pressure methanol enters the mixing chamber through the gun core, steam or compressed air is injected into the low-pressure methanol according to the fluid mechanics two-phase flow theory and is mixed in the mixing chamber to form a specific flow state-bubble flow of gas-in-liquid, and the internal and external pressure difference of bubbles is formed at the outlet of the gun head cover by utilizing the generation, movement and deformation of the bubbles; bubbles are expanded and cracked through the pressure difference to atomize methanol, the surface tension of the methanol is damaged by the atomization mode, so that the energy consumption is low, the atomization granularity is fine and is uniformly distributed, and the technical scheme has the advantages of stable combustion and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and particularly to an energy-saving burner using methanol as fuel and its combustion system. Background Art

[0002] In the existing combustion technologies, diesel is widely used as fuel for starting and stabilizing combustion of various types of boilers such as power plants, chemical plants, and waste power plants. However, with the continuous growth of global energy demand and the increasing awareness of environmental protection, finding alternative energy sources to reduce energy consumption and emissions has become an urgent task. Methanol, as a clean and renewable energy source, has broad application prospects.

[0003] Traditional combustion equipment is mainly designed for heavy fuels such as diesel, and thus is not suitable for light fuels such as methanol. There are significant differences in the combustion characteristics between methanol and diesel, such as ignition point, combustion speed, and flame stability. Directly using traditional combustion equipment to burn methanol often leads to problems such as incomplete combustion, unstable flame, and excessive emissions. This not only affects the combustion efficiency, but may also damage the equipment, increasing the operating cost and maintenance difficulty. Summary of the Invention

[0004] The purpose of the present invention is to provide an energy-saving burner using methanol as fuel and its combustion system, so as to solve the problems that traditional combustion equipment is mainly designed for heavy fuels such as diesel and is not suitable for light fuels such as methanol, and directly using traditional combustion equipment to burn methanol often leads to problems such as incomplete combustion, unstable flame, and excessive emissions.

[0005] To achieve the above purpose, the present invention provides an energy-saving burner using methanol as fuel. The energy-saving burner using methanol as fuel includes a gun head cover, a gun core, an air pipeline, and a methanol pipeline. One end of the methanol pipeline is provided with a methanol inlet, one end of the methanol pipeline is provided with the gun core, the air pipeline is sleeved outside the methanol pipeline, one end of the air pipeline close to the methanol inlet is provided with an air inlet, the other end of the air pipeline away from the methanol inlet is sleeved outside the gun core, the other end of the air pipeline away from the air inlet is installed with the gun head cover, and a mixing chamber is arranged inside the gun head cover. The mixing chamber is connected to the air pipeline and the methanol pipeline through the gun core.

[0006] Wherein, the air pipeline includes a pipeline body and a mounting sleeve. One end of the pipeline body is provided with the air inlet, the other end of the pipeline body is provided with the mounting sleeve. The mounting sleeve is sleeved outside the gun core, and a gap is arranged between the inner side wall of the mounting sleeve and the outer side wall of the gun core.

[0007] Wherein, an air inlet hood is provided at one end of the gun head cover away from the methanol pipeline. One end of the air inlet hood away from the gun core abuts against the inner side wall of the gun head cover. The cross-section of the outer side wall of the air inlet hood is of an inclined structure, and air inlet holes are provided on the outer side wall of the air inlet hood.

[0008] Wherein, a gasket is provided outside the mounting sleeve. The inner side wall of the gasket fits with the outer side wall of the mounting sleeve, and the outer side wall of the gasket fits with the inner side wall of the gun head cover.

[0009] The present invention also provides a combustion system using methanol as fuel, including the energy-saving burner using methanol as fuel as described above, and further including an air branch pipe and a methanol branch pipe. The air branch pipe is connected to the air pipeline through the air inlet. A gas meter, an air check valve, an air pneumatic ball valve, and an air stop valve are sequentially arranged on the air branch pipe. One end of the air stop valve away from the air branch pipe is connected to an air source through an atomizing air branch pipe. The methanol branch pipe is connected to the methanol pipeline through the methanol inlet, and the methanol branch pipe is sequentially connected to an oil meter, a fuel regulating valve, a fuel pneumatic ball valve, and a fuel stop valve. One end of the fuel stop valve away from the methanol branch pipe is connected to a fuel system through a fuel branch pipe.

[0010] Wherein, a purge pipeline is further provided on the atomizing air branch pipe. A purge stop valve, a purge pneumatic ball valve, and a purge check valve are sequentially connected on the purge pipeline. One end of the purge check valve away from the purge pipeline is connected to the methanol branch pipe and is located between the oil meter and the fuel regulating valve.

[0011] Wherein, the atomizing air branch pipe, the fuel branch pipe, and the purge pipeline all adopt pipes with an outer diameter of 20 mm and a wall thickness of 3.5 mm.

[0012] Wherein, the air inlet is connected to the gas meter through a first metal hose, and the methanol inlet is connected to the oil meter through a second metal hose.

[0013] An energy-saving burner and its combustion system using methanol as fuel of the present invention. The air duct is sleeved around the methanol duct. Through the air inlet and the methanol inlet, air and methanol respectively enter the air duct and the methanol duct, and enter the mixing chamber through the gun core. Utilizing the two-phase flow theory of fluid mechanics, a low-pressure atomizing medium (steam or compressed air) is injected into low-pressure methanol and mixed in the mixing chamber to form a specific flow pattern of liquid-in-gas - bubble flow. By using the generation, movement, and deformation of bubbles, until a pressure difference between the inside and outside of the bubbles is formed at the outlet of the gun head cover, the methanol is atomized by the bursting of the bubbles due to the pressure difference. This atomization method destroys the surface tension of methanol, so the energy consumption is small, the atomized particle size is fine and evenly distributed. Therefore, this technical solution has the advantages of stable combustion and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic structural diagram of an energy-saving burner using methanol as fuel provided by the present invention.

[0016] Figure 2 It is a schematic structural diagram of a combustion system using methanol as fuel provided by the present invention.

[0017] 101 - Gun head cover, 102 - Gun core, 103 - Methanol duct, 104 - Methanol inlet, 105 - Air inlet, 106 - Mixing chamber, 107 - Duct body, 108 - Installation sleeve, 109 - Air intake hood, 110 - Air intake hole, 111 - Gasket, 201 - Air branch pipe, 202 - Methanol branch pipe, 203 - Gas meter, 204 - Air check valve, 205 - Air pneumatic ball valve, 206 - Air stop valve, 207 - Atomizing air branch pipe, 208 - Oil meter, 209 - Fuel regulating valve, 210 - Fuel pneumatic ball valve, 211 - Fuel stop valve, 212 - Fuel branch pipe, 213 - Purge pipeline, 214 - Purge stop valve, 215 - Purge pneumatic ball valve, 216 - Purge check valve, 217 - First metal hose, 218 - Second metal hose. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] Please refer to Figure 1 , the present invention provides an energy-saving burner using methanol as fuel. The energy-saving burner using methanol as fuel includes a gun head cover 101, a gun core 102, an air duct, and a methanol duct 103. One end of the methanol duct 103 is provided with a methanol inlet 104, and one end of the methanol duct 103 is provided with the gun core 102. The air duct is sleeved around the methanol duct 103. One end of the air duct close to the methanol inlet 104 is provided with an air inlet 105. The end of the air duct far from the methanol inlet 104 is sleeved around the gun core 102. The gun head cover 101 is installed at the end of the air duct far from the air inlet 105. A mixing chamber 106 is provided inside the gun head cover 101. The mixing chamber 106 is connected to the air duct and the methanol duct 103 through the gun core 102.

[0020] In this embodiment, the air duct is sleeved around the methanol duct 103. Through the air inlet 105 and the methanol inlet 104, air and methanol enter the air duct and the methanol duct 103 respectively, and enter the mixing chamber 106 through the gun core 102. Using the two-phase flow theory of fluid mechanics, a low-pressure atomizing medium (steam or compressed air) is injected into low-pressure methanol and mixed in the mixing chamber to form a specific flow pattern of liquid-in-gas - bubble flow. By using the generation, movement, and deformation of bubbles, until a pressure difference between the inside and outside of the bubbles is formed at the outlet of the gun head cover 101, the methanol is atomized by the bursting of the bubbles due to the pressure difference. This atomization method destroys the surface tension of methanol, so the energy consumption is small, the atomization particle size is fine and evenly distributed. Therefore, this technical solution has the advantages of stable combustion and long service life.

[0021] Furthermore, the air duct includes a duct body 107 and a mounting sleeve 108. One end of the duct body 107 is provided with the air inlet 105, and the other end of the duct body 107 is provided with the mounting sleeve 108. The mounting sleeve 108 is sleeved outside the gun core 102, and a gap is provided between the inner side wall of the mounting sleeve 108 and the outer side wall of the gun core 102.

[0022] Further, an air inlet hood 109 is provided at one end of the gun head cover 101 away from the methanol pipeline 103. One end of the air inlet hood 109 away from the gun core 102 abuts against the inner wall of the gun head cover 101. The cross-section of the outer wall of the air inlet hood 109 is of an inclined structure, and air inlet holes 110 are provided on the outer wall of the air inlet hood 109.

[0023] In this embodiment, through the arrangement of the air inlet hood 109 and the air inlet holes 110, the air in the gap flows into the mixing chamber 106.

[0024] Further, a gasket 111 is provided outside the mounting sleeve 108. The inner wall of the gasket 111 fits against the outer wall of the mounting sleeve 108, and the outer wall of the gasket 111 fits against the inner wall of the gun head cover 101.

[0025] In this embodiment, through the arrangement of the gasket 111, the gun head cover 101 is more firmly mounted outside the mounting sleeve 108.

[0026] Please refer to Figure 2 , the present invention also provides a combustion system using methanol as fuel, including the energy-saving burner using methanol as fuel as described above, and further including an air branch pipe 201 and a methanol branch pipe 202. The air branch pipe 201 is connected to the air pipeline through the air inlet 105. An air meter 203, an air check valve 204, an air pneumatic ball valve 205 and an air stop valve 206 are sequentially arranged on the air branch pipe 201. One end of the air stop valve 206 away from the air branch pipe 201 is connected to an air source through an atomized air branch pipe 207. The methanol branch pipe 202 is connected to the methanol pipeline 103 through the methanol inlet 104. The methanol branch pipe 202 is sequentially connected to an oil meter 208, a fuel regulating valve 209, a fuel pneumatic ball valve 210 and a fuel stop valve 211. One end of the fuel stop valve 211 away from the methanol branch pipe 202 is connected to a fuel system through a fuel branch pipe 212.

[0027] Further, a purge pipeline 213 is also provided on the atomized air branch pipe 207. A purge stop valve 214, a purge pneumatic ball valve 215 and a purge check valve 216 are sequentially connected to the purge pipeline 213. One end of the purge check valve 216 away from the purge pipeline 213 is connected to the methanol branch pipe 202 and is located between the oil meter 208 and the fuel regulating valve 209.

[0028] Further, the atomized air branch pipe 207, the fuel branch pipe 212 and the purge pipeline 213 all adopt pipes with an outer diameter of 20 mm and a wall thickness of 3.5 mm.

[0029] Further, the air inlet 105 is connected to the gas meter 203 through a first metal hose 217, and the methanol inlet 104 is connected to the fuel meter 208 through a second metal hose 218.

[0030] In this embodiment, the fuel system adopts a low-pressure feeding method, with a methanol pressure of 5 - 10 Kg / cm2; the air pressure is about 5 Kg / cm2, greatly reducing the electrical energy and equipment costs. The wide adjustment ratio of 1:6 meets various environmental requirements, the pipeline requirements are low, the self-operated regulating valve makes the output pressure stable and reliable, and the multi-stage filtration system can effectively prevent nozzle blockage.

[0031] The working process of the new energy-saving burner using methanol as fuel in this technical solution is as follows: open the compressed air valve, with an air pressure of about 5 Kg / cm2; turn on the high-energy igniter to ignite; open the methanol valve, with a methanol pressure of about 5 Kg / cm2; if there is fire, the ignition is successful.

[0032] What is disclosed above is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. An energy-saving burner using methanol as fuel, characterized in that: It includes a gun head cover, a gun core, an air pipe and a methanol pipe, wherein a methanol inlet is provided at one end of the methanol pipe, the gun core is provided at one end of the methanol pipe, the air pipe is sleeved on the periphery of the methanol pipe, an air inlet is provided at the end of the air pipe close to the methanol inlet, an end of the air pipe away from the methanol inlet is sleeved on the periphery of the gun core, the gun head cover is installed on the end of the air pipe away from the air inlet, a mixing chamber is provided inside the gun head cover, and the mixing chamber is connected to the air pipe and the methanol pipe through the gun core.

2. The energy-saving burner using methanol as fuel as claimed in claim 1, characterized in that: The air duct includes a duct body and a mounting sleeve. The air inlet is provided at one end of the duct body, and the mounting sleeve is provided at the other end of the duct body. The mounting sleeve is sleeved on the outside of the gun core, and a gap is provided between the inner wall of the mounting sleeve and the outer wall of the gun core.

3. The energy-saving burner using methanol as fuel as claimed in claim 2, characterized in that: An air intake hood is provided at one end of the gun head cover away from the methanol pipeline, and the end of the air intake hood away from the gun core is in contact with the inner wall of the gun head cover. The cross-section of the outer wall of the air intake hood is an inclined structure, and an air intake hole is provided on the outer wall of the air intake hood.

4. The energy-saving burner using methanol as fuel as claimed in claim 3, characterized in that: A gasket is arranged outside the mounting sleeve, the inner wall of the gasket is fitted with the outer wall of the mounting sleeve, and the outer wall of the gasket is fitted with the inner wall of the gun head cover.

5. A combustion system using methanol as fuel, comprising the energy-saving burner using methanol as fuel as claimed in claim 1, characterized in that: It also includes an air branch pipe and a methanol branch pipe, the air branch pipe is connected to the air pipeline through the air inlet, the air branch pipe is sequentially provided with an air meter, an air check valve, an air pneumatic ball valve and an air stop valve, the end of the air stop valve away from the air branch pipe is connected to the air source through the atomizing air branch pipe, the methanol branch pipe is connected to the methanol pipeline through the methanol inlet, the methanol branch pipe is sequentially connected to the oil meter, the fuel regulating valve, the fuel pneumatic ball valve and the fuel stop valve, and the end of the fuel stop valve away from the methanol branch pipe is connected to the fuel system through the fuel branch pipe.

6. The energy-saving combustion system using methanol as fuel as claimed in claim 5, characterized in that: The atomizing air branch pipe is also provided with a purge pipeline, on which a purge stop valve, a purge pneumatic ball valve and a purge check valve are connected in sequence. The end of the purge check valve away from the purge pipeline is connected to the methanol branch pipe and is located between the oil meter and the fuel regulating valve.

7. The energy-saving combustion system using methanol as fuel as claimed in claim 6, characterized in that: The atomizing air branch pipe, the fuel branch pipe and the purge pipeline all use pipes with an outer diameter of 20 mm and a wall thickness of 3.5 mm.

8. The energy-saving combustion system using methanol as fuel as claimed in claim 7, characterized in that: The air inlet is connected to the gas meter through a first metal hose, and the methanol inlet is connected to the oil meter through a second metal hose.

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