CN112452575A - Rotational flow atomizing nozzle - Google Patents
Rotational flow atomizing nozzle Download PDFInfo
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- CN112452575A CN112452575A CN202011304095.8A CN202011304095A CN112452575A CN 112452575 A CN112452575 A CN 112452575A CN 202011304095 A CN202011304095 A CN 202011304095A CN 112452575 A CN112452575 A CN 112452575A
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- swirl
- section
- cavity
- rotational flow
- outlet section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/065—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet an inner gas outlet being surrounded by an annular adjacent liquid outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a rotational flow atomizing nozzle which comprises an inlet channel, a rotational flow cavity, an outlet section and a rotational flow inner core, wherein the inlet channel is connected with the rotational flow cavity and arranged along the tangential direction of the rotational flow cavity, the outlet section is communicated with an outlet of the rotational flow cavity, the outlet section is coaxial with the rotational flow cavity, the rotational flow inner core is coaxially arranged in the rotational flow cavity, the maximum radial dimension of the rotational flow inner core is not smaller than the radial dimension of an air core formed in the rotational flow cavity and smaller than the radial dimension of the internal cavity of the rotational flow cavity, and a smooth transition part which can enable rotational flow fluid formed in the rotational flow cavity to smoothly flow to the outlet section is arranged at one end, facing the outlet. The high-efficiency flue gas desulfurization nozzle with the inner core can effectively reduce the atomized particle size, improve the contact specific surface area of flue gas and liquid drops, improve the desulfurization efficiency and realize that the nozzle obtains smaller atomized particle size under the same inlet pressure condition.
Description
Technical Field
The invention relates to the field of chemical flue gas treatment, in particular to a rotational flow atomizing nozzle.
Background
Coal is the main fuel source in the thermal power industry of China, and SO generated by coal combustion2Is one of main pollutants of atmospheric environment in China, and increasingly strict environmental protection policies put forward higher requirements on ultralow emission, namely SO, for thermal power enterprises2The emission limit value is lower, most of the desulfurization systems of domestic thermal power enterprises at present adopt a limestone-gypsum method desulfurization process to meet the requirement of ultralow emission, and the rotational flow hollow cone atomizing nozzle is a critical component in the spray tower of the process, and mainly has the function of atomizing limestone slurry into fine liquid drops capable of providing enough contact area, SO that SO in flue gas is effectively removed2Its atomization performance directly affects the desulfurization efficiency and the utilization rate of the absorbent.
The Sulter particle size of the existing swirl hollow cone nozzle is about 2000 mu m, and in order to increase the desulfurization efficiency, the pressure of the nozzle can be only increased, the atomization effect is further improved, and the atomization particle size is reduced. However, when the pressure reaches a certain value, the range of particle size reduction is limited and the energy consumption of the desulfurization system is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a rotational flow atomizing nozzle, which is a high-efficiency flue gas desulfurization nozzle with an inner core, can effectively reduce the atomizing particle size, improve the contact specific surface area of flue gas and liquid drops, improve the desulfurization efficiency and realize that the nozzle obtains smaller atomizing particle size under the condition of the same inlet pressure.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a whirl atomizing nozzle, including inlet channel, the whirl cavity, export section and whirl inner core, inlet channel links to each other with the whirl cavity and sets up along the tangential of whirl cavity, export the section and be linked together with the export of whirl cavity, it is coaxial with the whirl cavity to export the section, the coaxial whirl inner core that is equipped with in the whirl cavity, the maximum radial dimension of whirl inner core is not less than the radial dimension of the air core that forms in the whirl cavity and is less than the radial dimension of whirl cavity inner chamber, the whirl inner core is established towards the one end of export section and is established to the smooth transition portion that can make the whirl fluid that forms in the whirl cavity flow to export the section.
Preferably, the smooth transition is a rounded conical shape.
Preferably, the smooth transition part is in a circular truncated cone shape, and the small end of the circular truncated cone shape is in transition connection with the side surface through an arc surface.
Preferably, one end of the smooth transition part facing the outlet section is provided with an extension part, the extension part extends to the tail end of the outlet section, the part of the extension part positioned in the upper section of the outlet section is provided with a neck section, and the part of the extension part positioned in the lower section of the outlet section is provided with an opening section; the radial size of the part from the smooth transition part to the necking section is gradually reduced, and the radial size from the necking section to the tail end of the flaring section is gradually increased.
Preferably, the distance between the neck section and the upper section of the outlet section is the same as the distance between the flared section and the lower section of the outlet.
Preferably, the outer side of the inlet channel is tangent to the inner surface of the cyclone chamber.
Preferably, the upper end of the rotational flow inner core is connected with the top end of the rotational flow cavity.
Preferably, the shape of the swirling flow cavity is an inverted pear-shaped structure or a cylindrical structure.
Preferably, the shape of the cyclone inner core is cylindrical.
Preferably, the outer diameter D5 of the swirl inner core, the diameter D8 of the air core of the swirl cavity and the maximum diameter D2 of the swirl cavity satisfy the following relationship:
m＝D5-D8，n＝D2-D8，m＝(0～0.6)n。
the invention has the following beneficial effects:
the rotational flow atomizing nozzle is provided with the rotational flow inner core in the rotational flow cavity, and the maximum radial dimension of the rotational flow inner core is not smaller than the radial dimension of an air core formed in the rotational flow cavity and smaller than the radial dimension of an inner cavity of the rotational flow cavity, wherein the radial dimension of the air core is the maximum diameter of the air core generated when the nozzle without the rotational flow inner core works. Establish to the smooth transition portion that can make the whirl fluid in the whirl cavity smooth flow to the export section through the one end with the whirl inner core towards the export section, utilize smooth transition portion can be with the smooth transition of whirl to the export section, prevent to produce the turbulent flow and make the kinetic energy of fluid reduce, guarantee fluidic velocity of flow and atomization effect. Therefore, the swirl atomizing nozzle can effectively reduce the atomizing particle size, improve the contact specific surface area of the flue gas and the liquid drops, improve the desulfurization efficiency and realize that the nozzle obtains smaller atomizing particle size under the condition of the same inlet pressure.
Furthermore, the smooth transition part is in a round-top conical shape or the round-top shape, so that the smooth transition of the rotational flow to the outlet section can be ensured, and the flow speed and the atomization effect of the fluid are ensured.
Furthermore, the extension part is arranged, so that the smooth transition of the rotational flow to the outlet section can be further ensured, the flow speed of the rotational flow liquid can be improved, and the atomization effect can be improved.
Further, the outer diameter D5 of the cyclone inner core, the diameter D8 of the air core of the cyclone cavity and the maximum diameter D2 of the cyclone cavity satisfy the following relations: when m is D5-D8, n is D2-D8, and m is (0-0.6) n, the swirl atomizing nozzle has excellent atomizing effect and small atomizing particle size.
Drawings
FIG. 1 is a schematic cross-sectional view of a swirl atomizing nozzle of the present invention;
FIG. 2 is a schematic structural diagram of a swirl atomizing nozzle according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a swirl atomizing nozzle according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a swirl atomizing nozzle according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a swirl atomizing nozzle according to an embodiment of the present invention.
In the figure, 1-inlet channel, 2-cyclone cavity, 3-outlet section, 3-1-outlet section upper section, 3-2-outlet section lower section, 4-cyclone inner core, 4-1-smooth transition part, 5-neck section and 6-flaring section.
Detailed Description
The invention is further described below with reference to the figures and examples.
Referring to fig. 1-5, the swirl atomizing nozzle comprises an inlet channel 1, a swirl cavity 2, an outlet section 3 and a swirl inner core 4, wherein the inlet channel 1 is connected with the swirl cavity 2 and arranged along the tangential direction of the swirl cavity 2, the outlet section 3 is communicated with an outlet of the swirl cavity 2, the outlet section 3 is coaxial with the swirl cavity 2, the swirl inner core 4 is coaxially arranged in the swirl cavity 2, the maximum radial dimension of the swirl inner core 4 is not less than the radial dimension of an air core formed in the swirl cavity 2 and is less than the radial dimension of an inner cavity of the swirl cavity 2, and one end, facing the outlet section 3, of the swirl inner core 4 is provided with a smooth transition part 4-1 which can enable swirl fluid formed in the swirl cavity 2 to smoothly flow to the outlet section 3.
Referring to fig. 2, as a preferred embodiment of the present invention, the smooth transition 4-1 is a rounded conical shape.
Referring to fig. 3, the smooth transition portion 4-1 is a truncated cone shape, and the small end and the side surface of the truncated cone shape are in transition connection through a circular arc surface.
As a preferred embodiment of the present invention, referring to fig. 4 and 5, the smooth transition portion 4-1 has an extension portion towards one end of the outlet section 3, the extension portion extends to the end of the outlet section 3, the outlet section 3 sequentially includes an outlet section upper section 3-1 and an outlet section lower section 3-2, the outlet section upper section 3-1 is in a necking shape, the outlet section lower section 3-2 is in a flaring shape (such as a trumpet shape), a portion of the extension portion located in the outlet section upper section 3-1 is set as a necking section 5, the necking section 5 is similar to the outlet section upper section 3-1 in shape, a portion of the extension portion located in the outlet section lower section 3-2 is set as a flaring section 6, and the flaring section 6 is similar to the outlet section lower section 3-2 in shape; the radial dimension of the smooth transition part 4-1 to the part of the necking section 5 is gradually reduced, and the radial dimension of the necking section 5 to the tail end of the flaring section 6 is gradually increased.
Referring to fig. 4 and 5, as a preferred embodiment of the present invention, the distance between the necking section 5 and the upper section 3-1 of the outlet section is the same as the distance between the flaring section 6 and the lower section 3-2 of the outlet section.
As a preferred embodiment of the invention, with reference to fig. 1-5, the outside of the inlet channel 1 is tangential to the inner surface of the cyclone chamber 2.
Referring to fig. 1 to 5, as a preferred embodiment of the present invention, the upper end of the swirling inner core 4 is connected to the top end of the swirling chamber 2.
As a preferred embodiment of the present invention, the shape of the swirling chamber 2 is an inverted pear-shaped structure (as shown in fig. 3 and 5) or a cylindrical structure (as shown in fig. 4).
Referring to fig. 1 to 5, the swirling inner core 4 is cylindrical in shape, as a preferred embodiment of the present invention.
As a preferred embodiment of the present invention, referring to fig. 1 to 5, the outer diameter D5 of the swirling inner core 4, the diameter D8 of the air core of the swirling cavity 2, and the maximum diameter D2 of the swirling cavity 2 satisfy the following relationship:
m＝D5-D8，n＝D2-D8，m＝(0～0.6)n。
in the atomizing nozzle, the air core is generated in the condition that the swirling flow inner core is not provided, liquid enters the swirling flow cavity tangentially from the inlet channel, the liquid rotates at a high speed in the swirling flow cavity, when the pressure at the center of the outlet flaring section is equal to the atmospheric pressure along with the increase of the rotating speed, the air core is formed at the outlet flaring section of the nozzle and the outlet of the nozzle, the sprayed liquid forms a conical annular liquid film rotating around the air core, a low-pressure area is formed at the center under the action of centrifugal force along with the further increase of the rotating speed, and external air flows into the nozzle under the action of negative pressure to form the air core. In the invention, the diameter D8 of the air core can be obtained by numerical simulation calculation of the rotational flow cavity 2 of the non-rotational flow inner core 4.
When the swirl atomizing nozzle works, liquid enters the swirl cavity 2 from the inlet channel 1 in a tangential direction, rotates along the gap between the swirl inner core 4 and the swirl cavity 3, generates centrifugal force through tangential rotation, forms a swirl, passes through the necking structure, and is ejected from the nozzle outlet at a certain designed flaring angle.
In fig. 1-5 of the present invention, a cross section is taken from the center line of the inlet channel 1 perpendicular to the axial direction of the outlet of the swirl atomizing nozzle, the inner contour diagram of the swirl atomizing nozzle of the present invention is shown in fig. 1, a vertical cross section is taken from the axial center line of the swirl cavity perpendicular to the axial direction of the inlet of the nozzle, two types of nozzles are taken as examples to be taken as inner contour diagrams shown in fig. 4 and 5, the diameter of the inlet channel 1 is D1, the maximum diameter of the swirl cavity 2 is D2, the diameter of the upper section of the outlet section is D3, the diameter of the lower section of the outlet section is D4, the maximum diameter of the swirl core is D5, the diameter of the necking section is D6, the diameter of the lower section (i.e., the end) of the flaring section of the swirl core (and the lower end) is. The size of the maximum diameter D5 of the cyclone inner core is determined according to the fluid medium characteristics of the nozzle and the size of the nozzle, and for the desulfurization of the flue gas of the power plant by the limestone-gypsum method, in order to prevent the limestone slurry from being blocked and be unfavorable for operation, a certain value range of D5 is set, wherein m is D5-D8, and n is D2-D8, and preferably, m is (0-0.6) n.
Claims (10)
1. A swirl atomizing nozzle is characterized by comprising an inlet channel (1), a swirl cavity (2), an outlet section (3) and a swirl inner core (4), wherein the inlet channel (1) is connected with the swirl cavity (2) and arranged along the tangential direction of the swirl cavity (2), the outlet section (3) is communicated with an outlet of the swirl cavity (2), the outlet section (3) is coaxial with the swirl cavity (2), the swirl inner core (4) is coaxially arranged in the swirl cavity (2), the maximum radial dimension of the swirl inner core (4) is not less than the radial dimension of an air core formed in the swirl cavity (2) and is less than the radial dimension of an inner cavity of the swirl cavity (2), one end of the rotational flow inner core (4) facing the outlet section (3) is provided with a smooth transition part (4-1) which can enable rotational flow fluid formed in the rotational flow cavity (2) to smoothly flow to the outlet section (3).
2. A swirl atomizing nozzle according to claim 1, characterized in that the smooth transition (4-1) is conical with a rounded top.
3. A swirl atomizing nozzle according to claim 1, characterized in that the smooth transition portion (4-1) is in the shape of a truncated cone, and the small end of the truncated cone is in transition connection with the side surface through a circular arc surface.
4. A swirl atomizing nozzle according to claim 1, characterized in that the smooth transition portion (4-1) has an extension towards the outlet section (3), the extension extends to the end of the outlet section (3), the extension is arranged in the upper section (3-1) of the outlet section as a neck section (5), and the extension is arranged in the lower section (3-2) of the outlet section as a mouth expanding section (6); the radial dimension of the smooth transition part (4-1) to the part of the neck reducing section (5) is gradually reduced, and the radial dimension of the neck reducing section (5) to the tail end of the flaring section (6) is gradually increased.
5. A swirl atomizing nozzle according to claim 4, characterized in that the distance between the neck section (5) and the upper section (3-1) of the outlet section is the same as the distance between the flared section (6) and the lower section (3-2) of the outlet section.
6. A swirl atomizing nozzle according to claim 1, characterized in that the outside of the inlet channel (1) is tangential to the inner surface of the swirl chamber (2).
7. A swirl atomizing nozzle according to claim 1, characterized in that the upper end of the swirl inner core (4) is connected to the top end of the swirl chamber (2).
8. A swirl atomizing nozzle according to claim 1, characterized in that the swirl chamber (2) is shaped as an inverted pear or cylinder.
9. A swirl atomizing nozzle according to claim 8, characterized in that the swirl core (4) is cylindrical in shape.
10. A swirl atomizing nozzle according to claim 9, characterized in that the outer diameter D5 of the swirl inner core (4), the diameter D8 of the air core of the swirl cavity (2) and the maximum diameter D2 of the swirl cavity (2) satisfy the following relation:
m＝D5-D8，n＝D2-D8，m＝(0～0.6)n。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011304095.8A CN112452575B (en) | 2020-11-19 | 2020-11-19 | Rotational flow atomizing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011304095.8A CN112452575B (en) | 2020-11-19 | 2020-11-19 | Rotational flow atomizing nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN112452575A true CN112452575A (en) | 2021-03-09 |
| CN112452575B CN112452575B (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011304095.8A Active CN112452575B (en) | 2020-11-19 | 2020-11-19 | Rotational flow atomizing nozzle |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527039C1 (en) * | 1995-07-25 | 1996-12-19 | Westfalia Separator Ag | Nozzle for drum centrifuge used in e.g. sludge thickening in water treatment |
| US20090090654A1 (en) * | 2005-01-03 | 2009-04-09 | Marathon Oil Sands (U.S.A.) Inc. | Nozzle reactor and method of use |
| CN204620253U (en) * | 2015-03-26 | 2015-09-09 | 成都来宝石油设备有限公司 | A kind of down-hole gas production vortex atomizing nozzle |
| CN209362815U (en) * | 2018-06-05 | 2019-09-10 | 东莞市捷力喷雾科技有限公司 | A kind of self-cleaning smoke abatement nozzle |
| CN209475992U (en) * | 2019-01-15 | 2019-10-11 | 西安西热锅炉环保工程有限公司 | A kind of smoke-gas wet desulfurization atomizer |
| CN111330432A (en) * | 2020-04-13 | 2020-06-26 | 华能国际电力股份有限公司 | High-efficient two entry passageway whirl atomizing desulfurization nozzle |
| CN211328967U (en) * | 2019-09-24 | 2020-08-25 | 鞍山创鑫环保科技股份有限公司 | Venturi mixing device with embedded throat pipe |
-
2020
- 2020-11-19 CN CN202011304095.8A patent/CN112452575B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527039C1 (en) * | 1995-07-25 | 1996-12-19 | Westfalia Separator Ag | Nozzle for drum centrifuge used in e.g. sludge thickening in water treatment |
| US20090090654A1 (en) * | 2005-01-03 | 2009-04-09 | Marathon Oil Sands (U.S.A.) Inc. | Nozzle reactor and method of use |
| CN204620253U (en) * | 2015-03-26 | 2015-09-09 | 成都来宝石油设备有限公司 | A kind of down-hole gas production vortex atomizing nozzle |
| CN209362815U (en) * | 2018-06-05 | 2019-09-10 | 东莞市捷力喷雾科技有限公司 | A kind of self-cleaning smoke abatement nozzle |
| CN209475992U (en) * | 2019-01-15 | 2019-10-11 | 西安西热锅炉环保工程有限公司 | A kind of smoke-gas wet desulfurization atomizer |
| CN211328967U (en) * | 2019-09-24 | 2020-08-25 | 鞍山创鑫环保科技股份有限公司 | Venturi mixing device with embedded throat pipe |
| CN111330432A (en) * | 2020-04-13 | 2020-06-26 | 华能国际电力股份有限公司 | High-efficient two entry passageway whirl atomizing desulfurization nozzle |
Non-Patent Citations (1)
| Title |
|---|
| 刘赵淼、王凯峰、王治林等: "阶梯型加速段对旋流喷嘴雾化特性的影响", 《力学学报》 * |
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| CN112452575B (en) | 2021-07-13 |
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