CN206973546U

CN206973546U - A kind of multistage atomizing oil gun

Info

Publication number: CN206973546U
Application number: CN201720746831.2U
Authority: CN
Inventors: 吴娇; 闫高程
Original assignee: Shanxi University
Current assignee: Shanxi University
Priority date: 2017-06-23
Filing date: 2017-06-23
Publication date: 2018-02-06
Anticipated expiration: 2027-06-23

Abstract

The utility model belongs to liquid fuel atomization field, and in particular to a kind of multistage atomizing oil gun, mainly solves boiler of power plant because the poor and oily burnout rate of oil gun atomizing effect is low, the problem of causing electric precipitation normally to put into.The utility model mainly includes overcoat, compress gas bushing, oil pipe, expand flow cone and Lovell nozzles etc. are cut down in drawing, realize the atomization of fuel oil three-level, the first order uses effervescent atomization principle, utilize the expansion characteristics explosion oil droplet of compressed gas, the second level uses pneumatic nebulization principle, utilize high speed compression gas vertical impact oil droplet, substantially it is vaporific by Oil Droplet Breakup, the third level realizes Supersonic Flow using Laval nozzle, micro-droplet of oil and surrounding static air is set to produce friction and tear, most micro-droplet of oil is thoroughly atomized at last, fuel-oil atmozation to diameter can be less than to 20 μm of state, the burnout rate of fuel oil after atomization is high, it disclosure satisfy that the requirement of boiler of power plant electric precipitation normal operation.

Description

A kind of multistage atomizing oil gun

Technical field

The utility model belongs to liquid fuel atomization field, and in particular to a kind of multistage atomizing oil gun.

Background technology

At present, there is the problem of burnout rate difference in the oil gun of China's boiler of power plant application, and the Residual oil not burnt is with flue gas stream Dynamic, final pickup influences the normal operation of electric precipitation on the battery lead plate of electric precipitation, so China's boiler of power plant code is clearly advised It is fixed, during oil gun puts into operation, forbid putting into electric precipitation, cause the flue gas that boiler is discharged to contain more dust, cause environment Pollution.

The oil gun of boiler of power plant application mainly has two kinds, and the first is mechanical oil gun, relies primarily on higher pressure energy, leads to Cross atomizing piece to be atomized fuel oil, this kind of oil gun is traditional oil gun, the problem of atomizing effect difference be present, second of oil gun is gas Dynamic atomized oil gun, the principle that mechanical pressure atomization and compressed air atomization are combined is employed, its atomizing effect is than mechanical oil gun There is larger improvement, but when the output of oil gun is bigger, however it remains the problem of the burnout rate difference of fuel oil.

The content of the invention

The purpose of this utility model is that solve boiler of power plant because the poor and oily burnout rate of oil gun atomizing effect is low, causes electricity to remove The problem of dirt can not normally be put into.The utility model provides a kind of principle advanced, simple in construction multistage atomizing atomized oil gun, profit With effervescent atomization principle, pneumatic nebulization principle and supersonic speed Oil Droplet Breakup principle, the atomizing effect of oil gun is substantially improved, is carried High burnout rate.

In order to solve the above technical problems, the technical solution adopted in the utility model is：

Lovell nozzles are cut down in a kind of multistage atomizing oil gun, including overcoat, compression gas bushing, oil pipe, expansion flow cone and drawing, described to expand stream At the port for boring the port of export for being located at oil pipe, and the vertex of a cone of expansion flow cone is set to be fixed towards the entrance point of oil pipe, and by locating piece In the inwall of oil pipe, expand the cone bottom of flow cone less than the caliber of the port of export of oil pipe, annular oil jet, overcoat are formed between oil pipe The port of export of oil pipe is sleeved on, and the port of export of outer casing inner wall and oil pipe is formed annular gas blowout mouth, and makes the cone bottom of expansion flow cone Taper oil/gas hybrid chamber A is formed between outer casing inner wall, compression gas bushing is sleeved on the entrance point of oil pipe, and is connected with overcoat, And the entrance point of oil pipe is stretched out the tail end of compression gas bushing, draw and cut down the exit that Lovell nozzles are arranged on overcoat, compress gas bushing Compressed gas import connection compressed air main pipe, oil pipe entrance point connection fuel oil main pipe.

The overcoat is made of one piece by tapered cap and sleeve, and the shape of tapered cap inwall is followed successively by from afterbody to head To the headward taper hybrid chamber of the inclined-plane of head inclination, the vertex of a cone and with drawing the spout for cutting down Lovell nozzle profiles and matching, outside Set afterbody inwall be provided with internal thread, so as to compressed gas sleeve pipe connection.

The oil pipe is a cylinder-shaped sleeve, and left section in cylinder-shaped sleeve is provided with effervescent atomization hole, the port of export of oil pipe Provided with to the inclined inclined-plane of entrance point, to form annular oil jet with overcoat.

It is described compression gas bushing be a cylinder-shaped sleeve, compress gas bushing left end outer wall be provided with external screw thread, so as to it is outer Set connection, positive stop lug boss is provided with compression left section of outer wall of gas bushing, and compressed gas import is provided with compression gas bushing right end sidewalls.

Sealing gasket is provided with the junction of the overcoat and compression gas bushing.

Pressure gauge and tune are provided with the compressed gas import of the compression gas bushing and the connecting pipeline of compressed air main pipe Valve is saved, pressure gauge and regulating valve are provided with the connecting pipeline of oil pipe and fuel oil main pipe.

The utility model uses above technical scheme, compared with background technology, have advantages below：

(1) effervescent atomization hole realizes the first order atomization to fuel oil：The utility model by installed in fuel filler and The manual modulation valve of compressed gas entrance pressure gentle to oil pressure is adjusted, it is ensured that the air pressure for entering compression gas bushing is higher than into oil The oil pressure (air pressure is higher by 0.1MPa than oil pressure under normal circumstances) of pipe, therefore compressed gas can enter oil by effervescent atomization hole In pipe, the two-phase flow that bubble and oil droplet mix is formed, then from being entered at annular oil burner nozzle at spray in hybrid chamber, due to mixed It is relatively low to close the pressure of chamber, bubble in two-phase flow just rapid swelling fracture, great effect of impact, substantial amounts of gas are formed to oil droplet Bubble, which seeks oil droplet, hits into broken foam, completes the first order atomization to fuel oil；

(2) compressed gas nozzle ring is atomized to complete to be atomized the second level of fuel oil：Because under normal circumstances, compressed gas is from spray When mouth sprays, initial velocity is high, but air velocity just rapid decline in extremely short distance, causes its impact to oil droplet to be made With decrease, in order to solve this problem, the utility model adds expansion flow cone in the exit of oil pipe so that fuel oil is close to ring The position outflow of shape gas jets, so oil droplet of the compressed air just with being sprayed from annular oil burner nozzle at annular gas jets meets, Now compressed gas very high speed, kinetic energy is very big, powerful impulsive force is formed to oil droplet, and airflow direction mutually hangs down with oil droplet direction Directly, oil droplet is forced under powerful active force, is changed original movement locus, splashes, is crushed into substantially vaporific；

(3) Laval nozzle realizes the third time atomization to oil droplet：Pressure outside due to oil gun is with mixing cavity pressure The ratio between be less than critical pressure, therefore realize Supersonic Flow using Laval nozzle, significantly increase micro-droplet of oil and surrounding The speed difference of air, then the air of oil droplet and geo-stationary rub, tear again, thoroughly as vaporific, complete third time Atomization；

(4) the gap width H1 of annular gas jets can be adjusted in the range of 0.5mm-1.5mm：Compression of the present utility model Gas bushing is in changeless position, and the overcoat of its left end connection can be rotated by screw thread, and then change H1 values, simultaneously It is that sealing function is realized by sealing gasket between mandatory declaration overcoat and compression gas bushing, so being thick by changing in practice Different sealing gaskets is spent to realize the adjustment to H1.H1 values are unsuitable excessive, and otherwise compressed gas consumption is too big, are atomized cost increase, So in practice on the premise of atomizing effect is ensured, H1 values are reduced as far as possible.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation of the utility model overcoat；

Fig. 3 is the structural representation of the utility model oil pipe；

Fig. 4 is the structural representation of the utility model compression gas bushing；

Fig. 5 is the structural representation that the utility model expands flow cone.

Embodiment

Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality It is new, it is not intended to limit the scope of the utility model.

As Figure 1-5, a kind of multistage atomizing oil gun in the present embodiment, including overcoat 1, compression gas bushing 2, oil pipe 3, Expand flow cone 4 and Lovell nozzles 5 are cut down in drawing；The overcoat 1 is made of one piece by tapered cap 101 and sleeve 102, the inwall of tapered cap 101 Shape be followed successively by from afterbody to head to the headward taper hybrid chamber 104 of inclined-plane 103, the vertex of a cone of head inclination and with drawing The spout 105 that the profile of Lovell nozzles 5 matches is cut down, internal thread 106 is provided with the inwall of the afterbody of overcoat 1, so as to compressing gas bushing 2 Connection；The oil pipe 3 is a cylinder-shaped sleeve, and left section in cylinder-shaped sleeve is provided with effervescent atomization hole 301, effervescent atomization hole 301 be that even circumferential is arranged, sets be no less than 4 altogether, and the port of export of oil pipe 3 is provided with to the inclined inclined-plane 302 of entrance point, so as to Annular oil jet is formed with overcoat 1；The compression gas bushing 2 is a cylinder-shaped sleeve, is provided with the compression left end outer wall of gas bushing 2 External screw thread 201, to be connected with overcoat 1, positive stop lug boss 202 is provided with compression 2 left sections of outer walls of gas bushing, in compression gas bushing 2 Right end sidewalls are provided with compressed gas import 203；Concentric arrangement at the port for expanding the port of export that flow cone 4 is located at oil pipe 3, and make Expand the vertex of a cone of flow cone 4 towards the entrance point of oil pipe 3, and the inwall of oil pipe 3 is fixed on by locating piece 6, the cone bottom for expanding flow cone 4 is small Form annular oil jet between the caliber of the port of export of oil pipe 3, with oil pipe 3, the gap of annular oil burner nozzle must be it is uniform, Overcoat 1 is sleeved on the port of export of oil pipe 3, and the inwall of overcoat 1 and the port of export of oil pipe 3 is formed annular gas blowout mouth, annular gas blowout The width of mouth is adjustable in the range of 0.5mm-1.5mm, and make between the cone bottom of expansion flow cone 4 and the inwall of overcoat 1 formed taper oil/ Gas hybrid chamber A, compression gas bushing 2 is sleeved on the entrance point of oil pipe 3, and is connected with overcoat 1, and stretches out the entrance point of oil pipe 3 The tail end of gas bushing 2 is compressed, is provided with sealing gasket 7 in the junction of the overcoat 1 and compression gas bushing 2, drawing is cut down Lovell nozzles 5 and installed In the exit of overcoat 1, the compressed gas import connection compressed air main pipe of compression gas bushing 2, the entrance point connection fuel oil of oil pipe 3 Main pipe, pressure gauge 8a and tune are provided with the compressed gas import of the compression gas bushing 2 and the connecting pipeline of compressed air main pipe Valve 9a is saved, pressure gauge 8b and regulating valve 9b is provided with the connecting pipeline of oil pipe 3 and fuel oil main pipe.

Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in Within the scope of shield.

Claims

A kind of 1. multistage atomizing oil gun, it is characterised in that：Including overcoat (1), compression gas bushing (2), oil pipe (3), expansion flow cone (4) Lovell nozzles (5) are cut down with drawing, it is described to expand at the port for the port of export that flow cone (4) is located at oil pipe (3), and make the vertex of a cone of expansion flow cone (4) Towards the entrance point of oil pipe (3), and the inwall of oil pipe (3) is fixed on by locating piece (6), the cone bottom for expanding flow cone (4) is less than oil The caliber of the port of export of (3) to be managed, annular oil jet is formed between oil pipe (3), overcoat (1) is sleeved on the port of export of oil pipe (3), And overcoat (1) inwall and the port of export of oil pipe (3) is formed annular gas blowout mouth, and make the cone bottom of expansion flow cone (4) and overcoat (1) interior Taper oil/gas hybrid chamber A is formed between wall, compression gas bushing (2) is sleeved on the entrance point of oil pipe (3), and with overcoat (1) even Connect, and the entrance point of oil pipe (3) is stretched out the tail end of compression gas bushing (2), draw and cut down Lovell nozzles (5) going out installed in overcoat (1) At mouthful, the compressed gas import connection compressed air main pipe of compression gas bushing (2), the entrance point connection fuel oil main pipe of oil pipe (3).
A kind of 2. multistage atomizing oil gun according to claim 1, it is characterised in that：The overcoat (1) is by tapered cap (101) It is made of one piece with sleeve (102), the shape of tapered cap (101) inwall is followed successively by from afterbody to head to the oblique of head inclination The headward taper hybrid chamber (104) of face (103), the vertex of a cone and the spout (105) that Lovell nozzles (5) profile matches is cut down with drawing, Internal thread (106) is provided with the inwall of overcoat (1) afterbody, to be connected with compression gas bushing (2).
A kind of 3. multistage atomizing oil gun according to claim 2, it is characterised in that：The oil pipe (3) is a cylindrical shroud Pipe, left section in cylinder-shaped sleeve is provided with effervescent atomization hole (301), and the port of export of oil pipe (3) is provided with inclined tiltedly to entrance point Face (302), to form annular oil jet with overcoat (1).
A kind of 4. multistage atomizing oil gun according to claim 3, it is characterised in that：The compression gas bushing (2) is a circle Cylindricality sleeve pipe, external screw thread (201) is provided with compression gas bushing (2) left end outer wall, to be connected with overcoat (1), in compression air-casing Pipe (2) left section of outer wall is provided with positive stop lug boss (202), and compressed gas import (203) is provided with compression gas bushing (2) right end sidewalls.
A kind of 5. multistage atomizing oil gun according to claim 4, it is characterised in that：In the overcoat (1) and compression air-casing The junction of pipe (2) is provided with sealing gasket (7).
A kind of 6. multistage atomizing oil gun according to claim any one of 1-5, it is characterised in that：In the compression gas bushing (2) compressed gas import and the connecting pipeline of compressed air main pipe are provided with pressure gauge (8a) and regulating valve (9a), in oil pipe (3) Pressure gauge (8b) and regulating valve (9b) are provided with the connecting pipeline of fuel oil main pipe.