CN211781056U

CN211781056U - Supersonic oil-saving environment-friendly oil gun

Info

Publication number: CN211781056U
Application number: CN202020165296.3U
Authority: CN
Inventors: 胡建廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-13
Filing date: 2020-02-13
Publication date: 2020-10-27
Anticipated expiration: 2030-02-13

Abstract

The invention relates to a fuel oil gun, in particular to a supersonic oil-saving environment-friendly fuel oil gun which is widely used in the ignition starting process of a power station boiler and a garbage incinerator, and comprises an oil pipe, an air pipe, a gun head and the like; the atomizing assembly is arranged at the gun head, the fuel atomizer and the supersonic speed air atomizer are arranged in the atomizing assembly, atomized fuel is further mixed in the gun cap after being atomized by air and then is sprayed out, and the supersonic speed air atomizer adopts a dispersed porous convergent-throat-divergent structure, is more precise and has more advanced technology.

Description

Supersonic oil-saving environment-friendly oil gun

Technical Field

The invention relates to a boiler combustion device, in particular to a supersonic oil-saving environment-friendly oil gun which is widely used in the ignition starting process of various power station boilers, garbage incinerators and the like.

Background

The supersonic oil-saving oil gun disclosed in the current market has the defect that the air gap is difficult to control in the actual production process of the oil gun, namely the oil-gas is difficult to control, so that the actual use effect cannot be ensured. For this purpose, technical optimization is necessary.

Disclosure of Invention

The invention aims to solve the technical problem of providing a more precise supersonic oil-saving environment-friendly oil gun aiming at the technical current situation.

The technical scheme adopted by the invention for solving the technical problems is that the supersonic oil-saving environment-friendly oil gun comprises a gun head and a gun barrel; the gun barrel comprises an oil pipe and an air pipe, and the inner pipe and the outer pipe are connected through a blocking block and a gun head; the gun head comprises a transition sleeve, an atomizer and a gun cap, the atomizer comprises an oil atomizer and a supersonic speed air atomizer, the atomizer is arranged at the outlet of the transition sleeve, and the gun cap is arranged on the outlet of the supersonic speed air atomizer, so that the supersonic speed oil-saving environment-friendly oil gun is formed.

The supersonic oil-saving environment-friendly oil gun barrel is mainly characterized in that the inner pipe is filled with fuel oil, and the outer pipe is filled with compressed air to form a double-layer sleeve structure with the inner pipe arranged in the outer pipe.

The gun head of the supersonic oil-saving environment-friendly oil gun is a key component of the device and comprises a transition sleeve and an atomizer, wherein the transition sleeve is mainly used for spatially isolating and circulating fuel oil and compressed air, and the atomizer comprises a fuel oil atomizer and a supersonic air atomizer.

The gun cap of the supersonic oil-saving environment-friendly oil gun is arranged at the outlet end of the supersonic air atomizer. The gun cap is mainly characterized in that a plurality of spray holes are uniformly distributed at the head of the gun cap, and oil-gas mixed flow is sprayed outwards at a certain angle after passing through the spray holes.

Drawings

FIG. 1 is a brief description about the supersonic technical theory, FIG. 2 is a right side view of the supersonic oil-saving environment-friendly oil gun, FIG. 3 is a main sectional view of the overall structure of the supersonic oil-saving environment-friendly oil gun, and FIG. 4 is a partially enlarged sectional view of a gun head region of the supersonic oil-saving environment-friendly oil gun.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings:

the structure of the present invention is described as follows:

referring to the attached figures 2 and 3, the supersonic oil-saving environment-friendly oil gun comprises: the device comprises an oil pipe 1, a blocking block 2, an air pipe 3, a transition sleeve 4, a supersonic atomizer 5, a gun cap 6, an oil atomizer 7, an oil outlet 8, a supersonic atomizer hole 9, an airflow through hole 10, a spray hole 11, an oil inlet 12 and an air inlet 13.

The supersonic oil-saving environment-friendly oil gun comprises: a barrel and a gun tip.

The gun barrel of the supersonic oil-saving environment-friendly oil gun comprises an oil pipe 1, a block 2, an air pipe 3 and a transition sleeve 4, wherein the oil pipe 1 and the air pipe 3 are concentrically welded together through the block 2 and the transition sleeve 4 which are respectively arranged at two ends, an oil inlet 12 is welded on the oil pipe 1, and an air inlet 13 is welded on the air pipe 3.

The gun head of the supersonic oil-saving environment-friendly oil gun comprises a transition sleeve 4, an oil atomizer 7, a supersonic atomizer 5 and a gun cap 6; airflow through holes 10 are uniformly distributed in the transition sleeve 4 in the circumferential direction; an oil atomizer 7 is arranged at the center of the transition sleeve 4, and an oil outlet 8 is formed in the center of the oil atomizer 7; the supersonic atomizer 5 is provided with supersonic atomizing holes 9 uniformly distributed in the circumferential direction.

The principle of supersonic atomization technology is briefly described as follows: with reference to figure 1 of the drawings,

1) about speed of sound

The concept of the sound velocity belongs to the field of physics research, and particularly in the field of aerodynamics, the calculation formula of the sound velocity is as follows:

wherein: v: as the speed of sound, γ: air specific heat ratio, 1.4, R: gas constant, 287.04J/KG K, T: when the air temperature is 0 ℃, T is 273.15+0 is 273.15k, and the sound velocity in the air is:

2) law of total pressure of gases

P₀: total gas pressure, P: the static pressure of the gas is,

is a gas dynamic pressure;

obviously, when the gas is directly expanded from rest, i.e. static pressure is completely converted into dynamic pressure, the velocity is calculated as follows:

ΔP＝P₀p, the static pressure difference, if the gas is given the parameters: the temperature is 0 ℃, the gauge pressure is 300000pa, and the density is 1.293kg/m³The velocity after full expansion is 681.2m/s and 2.2 times (681.2 ÷ 310.64) the speed of sound, and after full expansion, the gas has only a velocity head and no static head.

3) Constrained expansion

The complete free expansion of gas generally occurs in the fields of gas explosion, waste gas emission and the like, the expansion process is simple and rough, and has no value in any use, but in the industrial field, such as the fuel combustion process, gas, especially compressed air is usually adopted as an atomization gas source to provide original power, fuel oil is crushed, and a process medium is mixed in the compressed air expansion process, such as: the expansion process of compressed air needs to be restricted by liquid substances such as oil, water and the like, the structure adopted by the restricted expansion is to achieve gradual expansion instead of one-time expansion to the end, a reducing-throat-gradually-opening spray pipe technology is adopted, as shown in figure 1, the compressed air can be slowly expanded and gradually accelerated after entering a reducing port, at the moment, process media such as liquid working media such as water or oil and the like can be encountered, the liquid working media are crushed and wrapped by high-speed airflow after being impacted, then the liquid working media and the high-speed airflow continue to accelerate to expand to reach the throat, the maximum speed of the air can only be accelerated to the sound speed due to the small sectional area of the throat, and the mixture can continue to expand to realize full expansion due to the fact that the length of the throat is small, and at the moment, the expansion states are divided into three types: the expansion method comprises the following steps of firstly, underexpanding, namely the gas pressure after expansion is greater than the ambient pressure, having the potential of continuing expansion, secondly, over expanding, namely the gas pressure is less than the ambient pressure, and cannot be expanded, and the gas flow is very weak, and thirdly, the optimal expansion is realized, namely the gas pressure after expansion is equal to the ambient pressure, and the gas flow is parallel jet flow.

When the expanded airflow direction needs to be limited, a nozzle is added at the head of the gradually-expanding opening and is called a tail nozzle, the tail nozzle becomes a variable vector nozzle when the outflow angle can be properly adjusted, the tail nozzle becomes a fixed vector nozzle when the outflow angle cannot be properly adjusted, the nozzle of the tail nozzle becomes a one-dimensional nozzle when the nozzle of the tail nozzle is a single opening, the nozzle of the tail nozzle becomes a three-dimensional nozzle when the nozzle of the tail nozzle is a plurality of holes, the airflow speed is not increased when the total cross-sectional area of the tail nozzle is the same as the area of the gradually-expanding opening, and the expansion acceleration is continued when the total cross-sectional area of the tail nozzle is larger than the area of the gradually-expanding.

The invention adopts the structure of a gradually-reduced port, a throat, a gradually-enlarged port and a tail nozzle to realize supersonic speed powerful conveying of fuel media and realize multi-stage strong atomization and premixed combustion.

Wherein, the gun cap 6 of the supersonic oil-saving environment-friendly oil gun is provided with a plurality of spray holes 11.

The supersonic oil-saving environment-friendly oil gun is integrally fixed on a flange of a boiler burner through a tail mounting bolt.

The working principle is as follows:

firstly, fuel oil is led into the oil pipe 1 from the oil inlet 12 under certain pressure, compressed air is led into the air pipe 3 from the air inlet 13, and the two fluids flow into the transition sleeve 4.

The fuel oil of the supersonic oil-saving environment-friendly oil gun flows out of the transition sleeve 4 and then enters the oil atomizer 7, the fuel oil flows out of the oil outlet 8 at once, and the fuel oil is sprayed into the inner cavity of the gun cap 6 at a certain atomization angle;

the compressed air flow of the supersonic oil-saving environment-friendly oil gun flows through the transition sleeve 4 and then enters the supersonic atomizer 5, the supersonic atomizing holes 9 formed in the supersonic atomizer 5 expand and accelerate the air, the air just meets the fuel jet flow when being sprayed out, and then the air and the fuel jet flow are strongly collided and mixed, and are sprayed out from the spray holes 11 in the gun cap 6 after being fully developed.

The benefits of this are:

the supersonic atomizing hole 9 on the supersonic atomizer 5 adopts a tapered-throat-tapered expansion structure, according to the law of total gas pressure, gas is always accelerated in the expansion process, namely the process of converting static pressure into dynamic pressure, the gas pressure is slowly released, so that good impact force is ensured, and the supersonic atomizing hole is always in an underexpanded state to form high-speed jet with back pressure.

The special points are as follows: the design of the supersonic atomizing hole 9 on the supersonic atomizer 5 is unique, as shown in the attached figure 4, the supersonic atomizer is formed by a plurality of dispersed small holes with fixed apertures, the atomizing air flow rate is only dependent on the design stage and has no relation with the production stage, namely, the requirement on the level of production technicians is greatly reduced, the human factors are reduced, and the technical guarantee can be realized.

Claims

1. A supersonic speed oil-saving environment-friendly oil gun comprises a gun barrel and a gun head, and is characterized in that the gun barrel comprises an oil pipe (1), a blocking block (2), an air pipe (3) and a transition sleeve (4), wherein the oil pipe (1) and the air pipe (3) are concentrically welded on the blocking block (2) and the transition sleeve (4); the oil inlet (12) is welded at the inlet of the oil pipe (1); the air inlet (13) is welded on the side wall of the air pipe (3); the gun head comprises a transition sleeve (4), an oil atomizer (7), a supersonic speed atomizer (5) and a gun cap (6), and is characterized in that the oil atomizer (7) is arranged at the center of the transition sleeve (4), the supersonic speed atomizer (5) is directly connected to the transition sleeve (4), and the gun cap (6) is directly connected to the supersonic speed atomizer (5).

2. The supersonic oil-saving environment-friendly oil gun according to claim 1, characterized in that the gun head is internally provided with an oil atomizer (7) and a supersonic atomizer (5) at the same time.

3. The supersonic oil-saving environment-friendly oil gun as claimed in claim 1 or claim 2, wherein the supersonic atomizer (5) is uniformly provided with a plurality of supersonic channel supersonic atomizing holes (9) with gradually reduced mouth-throat-gradually enlarged mouth in the circumferential direction.