阅读说明：本技术 一种气助式两组分两级混合雾化喷头 (Gas-assisted two-component two-stage mixing atomizing nozzle ) 是由 吴春笃 曹爱能 张波 许小红 贾卫东 储晓猛 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种气助式两组分两级混合雾化喷头,包括高压进气口、一级收缩喉管、高压气体通道、组分进口一、一级混合室、二级收缩喉管、组分混合通道、组分进口二、二级混合室、喷嘴口；高压进气口接通空气压缩机,高压气体进入高压气体通道后于组分进口一处形成负压,组分由组分进口一自吸进入一级混合室中充分混合,实现组分混合物的第一次雾化；组分混合物通过组分混合通道高速喷出于,组分进口二处产生负压,组分进口二自吸进入到二级混合室后充分混合,经喷嘴口喷出形成了第二次雾化；利用高压气体对组分能够产生雾化作用,并利用高压气体产生的负压能够自吸组分进口一和组分进口二并将其充分混合,进一步实现两组分充分混合和二次雾化。(The invention discloses an air-assisted two-component two-stage mixing atomizing nozzle which comprises a high-pressure air inlet, a first-stage contraction throat pipe, a high-pressure gas channel, a first-component inlet, a first-stage mixing chamber, a second-stage contraction throat pipe, a component mixing channel, a second-component inlet, a second-stage mixing chamber and a nozzle opening; the high-pressure air inlet is communicated with an air compressor, negative pressure is formed at the first component inlet after high-pressure air enters the high-pressure air channel, and the components enter the first-stage mixing chamber from the first component inlet for full mixing to realize first atomization of a component mixture; the component mixture is sprayed out at a high speed through the component mixing channel, negative pressure is generated at the second component inlet, the second component inlet is self-sucked into the second-stage mixing chamber and then is fully mixed, and the mixture is sprayed out through the nozzle opening to form second atomization; the high-pressure gas can be used for atomizing the components, and the negative pressure generated by the high-pressure gas can sufficiently mix the first component inlet and the second component inlet by self-absorption, so that the two components are sufficiently mixed and secondarily atomized.)

1. The utility model provides a gas-assisted two-component two-stage mixing atomizer which characterized in that: the spray head comprises a high-pressure air inlet (1), a primary contraction throat pipe (2), a high-pressure gas channel (3), a component inlet I (4), a primary mixing chamber (5), a secondary contraction throat pipe (6), a component mixing channel (7), a component inlet II (8), a secondary mixing chamber (9) and a nozzle opening (10);

a high-pressure air inlet (1), a primary contraction throat pipe (2), a high-pressure gas channel (3), a primary mixing chamber (5), a secondary contraction throat pipe (6), a component mixing channel (7), a secondary mixing chamber (9) and a nozzle opening (10) are sequentially arranged on the central axis of the spray head from the spray head inlet to the spray head outlet; the first component inlet (4) is connected into the first-stage mixing chamber (5), the second component inlet (8) is connected into the second-stage mixing chamber (9), and the center line of the inlet end of the second component inlet (8) is collinear with the end face of the outlet end of the component mixing channel (7).

2. An air-assisted two-component two-stage mixing atomizer according to claim 1, wherein: the diameter of the high-pressure air inlet (1) is d₁The length between the inner port and the outer port is L₁；

The primary contraction throat pipe (2) is in a contraction cone shape from the air inlet to the air outlet, and the length L from a contraction port to an inner port of the high-pressure air inlet (1)₂And L is₁＝L₂Are equal.

3. An air-assisted two-component two-stage mixing atomizer according to claim 1, wherein: the diameter d of the high-pressure gas channel (3)₂Diameter d of the component mixing channel (7)₃The relationship is d₃＝1.5～1.7d₂(ii) a The length L of the high-pressure gas channel (3)₃The length L of the component mixing channel (7)₄The relationship between the two is L₃＝2.4～2.6L₄。

4. A gas-assisted two-component two-stage mixing atomizer according to claim 3, wherein: d₃＝1.6d₂；L₃＝2.5L₄。

5. An air-assisted two-component two-stage mixing atomizer according to claim 1, wherein: length L of primary mixing chamber (5)₅And the length L of the secondary mixing chamber (9)₆The relationship is L₅＝L₆(ii) a Diameter d of the primary mixing chamber (5)₄And the diameter d of the secondary mixing chamber (9)₅The relationship is d₄＝d₅。

6. An air-assisted two-component two-stage mixing atomizer according to claim 1, wherein: the component inlet I (4) and the component inlet II (8) are on the same axial plane;

the first component inlet (4) and the second component inlet (8) both comprise inlet ends and outlet ends, and the first component inlet (4) and the second component inlet (8) respectively comprise inlet ends and outlet ends4) Diameter d of inlet end₆Diameter d of inlet end of component inlet II (8)₇The diameters of the outlet ends of the component inlet I (4) and the component inlet II (8) are d₈The relationship is d₆＝d₇＝6d₈；

The vertical distance L between the central line of the component inlet I (4) and the inlet end surface of the high-pressure gas channel (3)₇＝0.3L₃；

The central line of the component inlet II (8) is coincident with the outlet end face of the component mixing channel (7), and the vertical distance L from the inlet end face of the component mixing channel (7)₈，L₈＝L₄；

The inlet depths of the component inlet I (4) and the component inlet II (8) are both h₂The outlet depth is h₁And h is₂＝5h₁。

7. An air-assisted two-component two-stage mixing atomizer according to claim 1, wherein: the contraction angle of a first-stage contraction throat pipe (2) arranged from the inlet to the outlet of the spray head is alpha, the contraction angle of a second-stage contraction throat pipe (6) is beta, and the beta is 1.5 alpha.

8. An air-assisted two-component two-stage mixing atomizer according to claim 7, wherein: the nozzle opening (10) of the spray head is structurally characterized in that an inner side port is a contraction port, an outer side port is a radiation port, the contraction port and the radiation port are symmetrically arranged, angles of the contraction port and the radiation port are all theta, and beta is 1.2 theta or 1.5 alpha; the length from the contraction opening to the radiation opening is L₉And L is₉Length L of component mixing channel (7)₄The high velocity gas flow through the conical nozzle opening facilitates atomization.

9. The operating method of an air-assisted two-component two-stage mixing atomizer according to any one of claims 1 to 7, wherein: the high-pressure air inlet (1) is communicated with an air output end of an air compressor, high-pressure air enters the high-pressure air channel (3) and forms negative pressure at the component inlet I (4), and the component I is self-sucked into the primary mixing chamber (5) from the component inlet I (4) and is fully mixed, so that the first atomization of a component mixture is realized; the component mixture is sprayed out of the outlet end of the component mixing channel (7) at high speed through the component mixing channel (7) to generate negative pressure, the component II enters the secondary mixing chamber (9) by self suction and is fully mixed, and the component II is sprayed out through the nozzle opening (10) to form secondary atomization.

Technical Field

The invention relates to an air-assisted two-component two-stage mixing atomizer, in particular to an air-assisted two-component two-stage mixing atomizer which can fully mix gas, liquid and liquid, atomize for the second time, achieve a certain purification degree, refine the particle size of fog drops and have higher atomization coefficient.

Background

At present, gas-liquid two-phase atomizing nozzles are difficult to realize sufficient gas-liquid mixing structurally, the operating principle mainly adopted is that gas enters from one end, liquid enters from the other end, and the liquid is sprayed out from a nozzle through high-pressure gas, but the atomizing effect is general, the spraying range is narrow, and the atomizing nozzles cannot be well applied to most fields; this design will use main gas circuit to be gaseous, and other two passway mouths can be gaseous and liquid all the way, also can two ways be liquid, realize gas-liquid mixture and gas-liquid mixture, and the mixture of multiple composition makes it fully mix and react each other in inside, makes its diffusion in certain space. Therefore, the air-assisted spray head capable of fully realizing gas-liquid mixing or gas-liquid mixing is designed.

Disclosure of Invention

The gas-assisted two-component two-stage mixing atomizing nozzle is designed aiming at the problems in the prior art, gas-liquid/gas-liquid full mixing and secondary atomization are effectively realized through high-pressure gas, a certain purification degree can be achieved, the particle size of fog drops is further reduced, and the atomizing coefficient is higher.

A gas-assisted two-component two-stage mixing atomization nozzle comprises a high-pressure gas inlet, a first-stage contraction throat pipe, a high-pressure gas channel, a first component inlet, a first-stage mixing chamber, a second-stage contraction throat pipe, a component mixing channel, a second component inlet, a second-stage mixing chamber and a nozzle opening;

a high-pressure air inlet, a primary contraction throat pipe, a high-pressure gas channel, a primary mixing chamber, a secondary contraction throat pipe, a component mixing channel, a secondary mixing chamber and a nozzle opening are sequentially arranged on the central axis of the spray head from the spray head inlet to the spray head outlet; the first component inlet is connected into the first-stage mixing chamber, the second component inlet is connected into the second-stage mixing chamber, and the center line of the inlet end of the second component inlet is collinear with the end face of the outlet end of the component mixing channel.

Further, the diameter of the high-pressure gas inlet is d₁The length between the inner port and the outer port is L₁(ii) a The first-stage contraction throat pipe is in a contraction cone shape from the air inlet to the air outlet, and the contraction opening is arranged in the high-pressure air inletLength L of port₂And L is₁＝L₂Are equal.

Further, the diameter d of the high-pressure gas passage₂Diameter d of component mixing channel₃The relationship is d₃＝1.5～1.7d₂Is preferably d₃＝1.6d₂(ii) a Length L of high pressure gas channel₃Length L of channel for mixing with component₄The relationship between the two is L₃＝2.4～2.6L₄Is preferably L₃＝2.5L₄。

Further, the length L of the primary mixing chamber₅And a secondary mixing chamber length L₆The relationship is L₅＝L₆(ii) a Diameter d of the primary mixing chamber₄And diameter d of the secondary mixing chamber₅The relationship is d₄＝d₅。

Further, the component inlet I and the component inlet II are on the same axial plane; the first component inlet (4) and the second component inlet (8) both comprise an inlet end and an outlet end, and the diameter d of the inlet end of the first component inlet₆Diameter d of inlet end of component inlet II₇The diameters of the outlet ends of the component inlet I and the component inlet II are d₈The relationship is d₆＝d₇＝6d₈(ii) a The vertical length L of the central line of the first component inlet from the inlet end surface of the high-pressure gas channel₇＝0.3L₃(ii) a The central line of the component inlet II coincides with the outlet end face of the component mixing channel and is away from the vertical length L of the inlet end face of the component mixing channel₈，L₈＝L₄(ii) a The inlet depth of the component I and the inlet depth of the component II are both h₂The outlet depth is h₁And h is₂＝5h₁。

Furthermore, the contraction angle of a first-stage contraction throat pipe arranged from the inlet to the outlet of the spray head is alpha, the contraction angle of a second-stage contraction throat pipe is beta, and the beta is 1.5 alpha.

Furthermore, the nozzle opening of the nozzle head is provided with an inner port which is a contraction port and an outer port which is a radiation port which are symmetrically arranged, the angles of the contraction port and the radiation port are all theta, and beta is 1.2 theta or 1.5 alpha; from contractionThe length from the mouth to the radiation opening is L₉And L is₉＝L₄The high velocity gas flow through the conical nozzle opening facilitates atomization.

A working method of an air-assisted two-component two-stage mixing atomizing nozzle is characterized in that a high-pressure air inlet is communicated with an air output end of an air compressor, high-pressure air enters a high-pressure air channel and then forms negative pressure at a component inlet, and a component I enters a first-stage mixing chamber from a component inlet for self-suction and is fully mixed, so that the first atomization of a component mixture is realized; the component mixture is sprayed out of the outlet end of the component mixing channel at high speed through the component mixing channel to generate negative pressure, the component II enters the secondary mixing chamber by self absorption and is fully mixed, and the component II is sprayed out through the nozzle opening to form secondary atomization.

The invention has the beneficial effects that:

(1) the sizes of all parts of the air-assisted two-component two-stage mixing atomizing nozzle are set, on one hand, the sizes of the nozzles are mutually restricted and associated, so that the setting is further determined on the basis of design and test, and the aim of fully mixing the nozzles can be better fulfilled; on the other hand, the structure can be reasonably scaled through the relation convention among the sizes, and the requirements of different working conditions can be met.

(2) In order to realize more sufficient gas-liquid-gas mixing, a high-pressure gas inlet channel is designed on the central axis of a spray head, a first component inlet and a second component inlet are designed on the same axis, high-speed gas flow enters from one end of a high-pressure inlet, negative pressure is formed by the high-pressure gas flow to suck the first component and the second component into a mixing cavity for sufficient mixing, and the first component and the second component are sprayed out through a nozzle opening, so that the gas-liquid-gas mixing and secondary atomization are realized, a certain purification degree can be reached, the particle size of atomized droplets is refined, and the atomization coefficient is higher.

Drawings

Fig. 1 is a schematic structural diagram of an air-assisted two-component two-stage mixing atomizer.

Reference numerals:

1-a high pressure gas inlet; 2-first-stage contraction throat; 3-high pressure gas channel; 4-component inlet one; 5-a first-stage mixing chamber; 6-two-stage constriction throat; 7-component mixing channel; 8-component inlet two; 9-a secondary mixing chamber; 10-nozzle opening.

Detailed Description

The invention will be further described with reference to the accompanying drawings, in which embodiment component inlet one 4 is defined as the liquid inlet, and the liquid is water (H)₂O); the second component inlet 8 is defined as a gas inlet, and the gas is ozone (O)₃)。

As shown in fig. 1, the gas-assisted two-component two-stage mixing atomizer comprises a high-pressure gas inlet 1, a first-stage contraction throat 2, a high-pressure gas channel 3, a liquid inlet 4, a first-stage mixing chamber 5, a second-stage contraction throat 6, a component mixing channel 7, a gas inlet 8, a second-stage mixing chamber 9 and a nozzle opening 10; the high-pressure gas inlet 1 is communicated with an air compressor, negative pressure is formed at a component inlet I4 of a liquid water inlet after high-pressure gas enters the high-pressure gas channel 3, and liquid enters a primary mixing chamber 5 from the component inlet I4 to be fully mixed; the gas-liquid mixture is ejected out of the outlet end of the component mixing channel 7 at high speed through the gas-liquid component mixing channel 7 to form negative pressure, and the gas enters the secondary mixing chamber 9 for mixing.

As shown in FIG. 1, the high-pressure gas inlet 1 has a diameter d₁8.4mm, and a length L from the inner port to the outer port₁The first-stage contraction throat pipe 2 is in a contraction cone shape from the air inlet to the air outlet, and the length from a contraction opening to an inner port of the high-pressure air inlet 1 is L₂And L is₁＝L₂＝6.5mm。

As shown in fig. 1, the high-pressure gas passage 3 has a diameter d₂1.5mm, the diameter of the component mixing channel 7 is d₃2.4 mm; length L of high-pressure gas channel 3₃10.5mm, length L of component mixing channel 7₄＝4.0mm。

As shown in FIG. 1, the length L of the primary mixing chamber 5₅And the length L of the secondary mixing chamber 9₆Equal, the two relations are L₅＝L₆10.0 mm; diameter d of the primary mixing chamber 5₄And diameter d of the secondary mixing chamber 9₅Equal, the two relations are d₄＝d₅＝10.0mm。

As shown in fig. 1, the liquid entersThe first inlet 4 and the second inlet 8 are distributed on the same axial plane, the diameter d of the inlet end of the liquid₆Diameter d of gas inlet end₇The diameters of the outlet ends of the liquid and the gas are both d₈，d₆＝d₇＝6.0mm，d₈1 mm; the vertical distance L between the central line of the liquid inlet and the inlet end surface of the high-pressure gas channel 3₇3.15 mm; the central line of the gas inlet coincides with the outlet end face of the component mixing channel 7 and is at a vertical distance L from the inlet end face of the component mixing channel₈4.0 mm; the inlet depths of the liquid inlet and the gas inlet are both h₂The outlet depth is h₁，h₂＝7.0mm,h₁＝1.4mm。

As shown in fig. 1, the contraction angle of the primary contraction throat of the nozzle from the inlet to the outlet of the nozzle is α, the contraction angle of the secondary contraction throat is β, β is 90 °, and α is 60 °.

Furthermore, the inner port of the nozzle of the spray head is a contraction port, the outer port of the nozzle is a radiation port, the contraction port and the radiation port are symmetrically arranged, the angles of the contraction port and the radiation port are all theta, and the theta is 75 degrees; the length from the contraction opening to the radiation opening is L₉4.0mm, high velocity air flow through the conical nozzle opening facilitates atomization.