Nozzle for spraying viscous liquids

FIELD: burners.

SUBSTANCE: nozzle has mixing chamber whose section arranged downstream of the radial nozzles of the first sprayer is conical. The nozzles of the third sprayer are arranged over the periphery at the outlet of the conical section of the chamber. The nozzles of the third sprayer are connected with the ring row of the passages of the first sprayer. The nozzles of the third sprayer are mounted at an angle of to the vertical axis of the nozzle and under an angle of to its plane.

EFFECT: enhanced efficiency.

1 cl, 2 dwg

 

The invention relates to techniques for the atomization of liquids, predominantly viscous and contains abrasive particles, and can be used in various areas of industrial activity, in particular in fuel assemblies.

Known nozzle for atomization of viscous liquids, comprising a housing with a Central fuel feed spray gun connected to the mixing chamber, and a radial nozzle of the primary nozzle and the secondary nozzle atomizer, telling annular channel with the mixing chamber. (USSR author's certificate No. 1444585 class. F 23 D 11/04, 1987).

Also known nozzle for atomization of viscous liquids (prototype), comprising a housing with a Central fuel channel and a coaxial annular feed channel of the dispenser is connected to a cylindrical mixing chamber, and a radial nozzle of the primary nozzle and the secondary nozzle atomizer, telling annular channel with the mixing chamber, and the nozzle body is made annular series of axial channels connected at the inlet to the mixing chamber, a radial nozzles of the primary nozzle, the longitudinal axes of which are arranged at a distance from the output cutoff of the fuel channel is greater than the diameter of 1.5-3.0 times, the output sections above radial nozzles are located from the axis of the housing at the races is the being, exceeding the diameter of 4-6 times, and the secondary nozzle of the sprayer is made of axial and offset in the circumferential direction relative to the axial channels, with their longitudinal axes are located from the axis of the housing at a distance greater than the diameter of 1.5-3.0 times. (Patent RF №2039910 class. F 23 D 11/10, 1992).

The disadvantages of the known nozzles are polydispersity spray, small angle "torch", a high density of irrigation, the inability to control the geometric characteristics raspisivaem fluid, i.e. to change the length and angle "torch" when changing the flow rate of the nozzles in a wide range.

The purpose of the invention is the efficiency of the nozzle by improving the quality of atomization and control the geometry of the spray in a wide range of flow raspisivaem liquid.

The purpose is due to the fact that the nozzle for atomization of viscous liquids, comprising a housing with a Central fuel channel and a coaxial annular channels feed nozzle connected to the mixing chamber, radial nozzle of the primary spray nozzle secondary atomizer reporting annular channel with the mixing chamber, and an annular series of axial channels of the primary nozzle ring and the number of channels of the secondary nozzle connected at the input to the coaxial ring to the Nala feed spray gun, and the output respectively to the nozzles of the primary nozzle and the nozzles of the secondary nozzle, the output sections of radial nozzles of the primary dispenser is located from the axis of the housing at a distance greater than the diameter of 4-6 times the longitudinal axis of the nozzles are located from the output of the slicer Central fuel channel at a distance greater than the diameter of 1.5-3.0 times, unlike the prototype part of the mixing chamber, located behind the radial nozzles of the primary dispenser, made of conical shape, the circumference at the outlet of the conical part of the chamber are made of the tertiary nozzle atomizer, and the tertiary nozzle sprayer set at an angle δ≥15° relative to the vertical axis of the nozzle and at an angle ϕ≥15° with respect to its plane.

In addition, the tertiary nozzle atomizer is connected to the annular row of channels of the primary nozzle.

Execution output side of the mixing chamber located behind the radial nozzles of the primary nozzle, conical form, as part of the diffuser, allows optimal positioning of the desired number of tertiary nozzles spray around the circumference of the output shaft of the mixing chamber and, in addition, to create conditions for interaction flow of the spray agent and drip-air mass, eliminating abrasion of the walls of the chamber to shift the mode of the expanding jets, bleeding from the secondary nozzles of spray.

The presence of a tertiary nozzles spray on the output shaft of the mixing chamber can significantly narrow the scope of polydispersity spray, additionally crushed by drip-air mass before monodisperse state in a certain range to increase the cone angle of the spray, to reduce the length of the spray, to reduce the density of irrigation, to create a vacuum region inside the cone, to increase the throughput of the nozzles for the same size.

Setting tertiary nozzles spray angle δ≥15° relative to the vertical axis of the nozzle allows you to achieve the most uniform flow interaction due to the capture jet flowing from the nozzle of the spray agent, a specific sector drip-air mass at the outlet of the conical part of the mixing chamber in the absence of the interaction of these jets with each other. When changing the number of nozzles, for these conditions the angle δ may vary upward.

Setting tertiary nozzles spray angle ϕ≥15° relative to the plane of the nozzle allows to obtain the desired angle of taper sprayed drip-air mass.

Connection nozzles of the tertiary nozzle to the annular row of channels of the primary spray issue is Leno option for multi-feed spray agent in the primary channels, secondary and tertiary nozzle and for ease of manufacture of the nozzle.

By dividing the flow of the spray on the three - primary, secondary and tertiary - is the gradual fragmentation, thereby maximizing the interaction of the fuel spray, ensuring its quality spray, bringing it to the monodisperse state in a certain range, i.e. significantly narrows prefractionator spray, as well as giving the desired geometry. On the cut atomizer no films, filaments and large drops, characteristic of many sprayers.

A wide range of regulation of fuel and spray without compromising quality indicators spraying is carried out during operation of the nozzle when the organization of separate feed spray into the channels of the primary, secondary and tertiary streams.

Figure 1 shows the nozzle for atomization of viscous liquids, the cross-section; figure 2 shows a section along a-a in figure 1.

The nozzle includes a housing 1 with an external mixing chamber 2, Central fuel channel 3 connected to the mixing chamber, a coaxial annular channel 4 feed spray gun. The body is made annular series of axial channels 5 for supplying a primary flow atomizer (air, steam, etc. and the ring number of channels 6 for feeding the secondary stream respirational 5 and 6 are arranged around a Central fuel channel 3 and connected at the input to the coaxial annular channel 4. Channel 5 is supplied at the output of radial nozzles 7 of the primary nozzle. The camera part 2 mixing, located to the nozzles 7 of the primary dispenser, made of cylindrical form, with the primary nozzles of a spray - conical shape. Radial nozzle 7 of the primary nozzle is connected to the side wall of the mixing chamber 2 in its cylindrical part, the output sections of the longitudinal radial nozzles 7 are located from the axis of the housing at a distance greater than the diameter of 4-6 times, and from the output of the slicer fuel channel they are located at a distance greater than the diameter of 1.5-3 times. The channels 6 are supplied at the output of the nozzles 8 of the secondary nozzle connected to the bottom of the cylindrical part of the chamber 2 mixing, with their longitudinal axes are located from the axis of the housing at a distance greater than the diameter of 1.5-3 times. The circumference at the outlet of the conical part of the chamber 2 mixing executed nozzle 9 of the tertiary nozzle connected to channel 5 of the primary nozzle. The nozzle 9 of the tertiary nozzle installed at an angle δ≥15° relative to the vertical axis of the nozzle and at an angle ϕ≥15° with respect to its plane.

The nozzle operates as follows. Central fuel channel 3 is fed to the mixing chamber 2 viscous fuel (such as coal-water fuel - CWF), spray agent (e.g. air) is taut from channel 4 feed spray gun at the same time in the channels 5 of the primary nozzle and the channels 6 of the secondary nozzle. Thus, streams of air flowing from channels 5 through the nozzle 7 of the primary nozzle directed toward the axis of the Central fuel channel 3 toward each other, create the effect of gas-dynamic locking fuel flow, resulting jet fuel is initially divided into a coarse fraction, which are randomly moving in turbulent flows arising from the interaction of oppositely directed jets, which leads to additional fragmentation of large fractions of the fuel into smaller droplets, which are located in the sectors formed by the expiration of the air flow from these nozzles.

Emerging from the nozzles 8 of the secondary nozzle, the air flow splits drops CWF to molefractions state and makes the air-fuel mixture out of the mixing chamber, which has a nozzle 9 of the tertiary nozzle. High-speed stream of air emanating from the nozzles of the tertiary nozzle, finally crushes positraction drip-air mixture, bringing it closer to the monodisperse state, i.e. significantly narrows the range of dispersion and gives it the desired geometric characteristics: length, taper angle and correspondingly low density of irrigation. In addition, the expiration of air from the nozzles of the tertiary nozzle creates the entraining effect, both on the periphery and inside the cone required for the organization of PR is the process stable ignition and combustion of fuels.

To adjust the parameters of the spray nozzles in a wide range can be made and a separate flow of the spray agent nozzle primary, secondary and tertiary nozzle. Changing parameters feed spray agent and its redistribution by the spray nozzles at a certain structural performance of nozzles and the mixing chamber, it is possible to vary the fuel flow, dispersion nozzle, long spray cone angle from 15 to 160° and gravity irrigation. For example, the nozzle of the same size will work satisfactorily in the range of fuel consumption from 100 to 1000 kg/h

Setting tertiary nozzles of the sprayer does not increase the flow of the spray agent, because the opportunity to constructively change the number of nozzles and to vary the diameter of the nozzles of the primary, secondary and tertiary nozzle. The specific flow of the spray agent is <20% of fuel consumption, as in the prototype.

1. Nozzle for atomization of viscous liquids, comprising a housing with a Central fuel channel and a coaxial annular flow channel of the nozzle connected to the mixing chamber, radial nozzle of the primary spray nozzle secondary atomizer reporting annular channel with the mixing chamber, and an annular series of axial channels of the primary nozzle and the ring number the channels of the secondary nozzle, connected at the input to the coaxial annular feed channel of the atomizer, and the output respectively to the nozzles of the primary nozzle and the nozzles of the secondary nozzle, the output sections of radial nozzles of the primary dispenser is located from the axis of the housing at a distance greater than the diameter of 4-6 times the longitudinal axis of the nozzles are arranged from the output of the slicer Central fuel channel at a distance greater than the diameter of 1.5-3.0 times, characterized in that the portion of the mixing chamber, located behind the radial nozzles of the primary dispenser, made of conical shape, the circumference at the outlet of the conical part of the chamber are made of the tertiary nozzle sprayer with nozzle the tertiary nozzle installed at an angle δ≥15° relative to the vertical axis of the nozzle and at an angle ϕ≥15° with respect to its plane.

2. The nozzle according to claim 1, characterized in that the tertiary nozzle atomizer is connected to the annular row of channels of the primary nozzle.



 

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