CN107271383B - Array flame converging atomizer for flame atomic fluorescence spectrometer - Google Patents
Array flame converging atomizer for flame atomic fluorescence spectrometer Download PDFInfo
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- CN107271383B CN107271383B CN201710420187.4A CN201710420187A CN107271383B CN 107271383 B CN107271383 B CN 107271383B CN 201710420187 A CN201710420187 A CN 201710420187A CN 107271383 B CN107271383 B CN 107271383B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The invention relates to an array flame converging atomizer for a flame atomic fluorescence spectrometer, which comprises a fixed sleeve, wherein the bottom of the fixed sleeve is provided with a connecting port for connecting with an atomization system transmission chamber, and the top of the fixed sleeve is connected with the bottom of an atomizer array combustion core; the bottom of the air hole array seat is sleeved outside the upper part of the fixed sleeve, the top of the air hole array seat is connected with the bottom of the shielding cylinder, the shielding cylinder is positioned outside the atomizer array combustion core, and a distance is reserved between the shielding cylinder and the atomizer array combustion core; a circle of grooves are formed in the inner side of the middle position of the air hole array seat, and the grooves and the outer side wall of the bottom of the atomizer array combustion core form an auxiliary air passage; the auxiliary gas pipeline is arranged at one side of the air hole array seat and is connected with the auxiliary gas channel; a plurality of auxiliary air holes are arranged above the auxiliary air passage at intervals on the air hole array seat. The invention has higher atomization efficiency, stable atomization flame and energy production, and can be widely applied to the field of atomic spectrum analysis instruments.
Description
Technical Field
The invention relates to the field of atomic spectrum analysis instruments, in particular to an array flame converging atomizer for a flame atomic fluorescence spectrometer.
Background
The flame atomic fluorescence spectrometer breaks through the principle limitation of the atomic fluorescence spectrometer of the hydride generation method, expands the detection elements of the atomic fluorescence spectrometer, can test Au, ag, cu, cd, zn, cr, co, ni, pb, fe, in, mn, hg, te and other elements, and particularly has remarkable results in the aspect of testing trace gold. When Au is tested by flame method, the sensitivity of the Au is already superior to that of graphite furnace atomic absorption method, and the linear range is greatly superior to that of graphite furnace atomic absorption method, but the operation cost is far lower than that of graphite furnace atomic absorption method.
The flame atomic fluorescence spectrometer has wide detection range, can completely meet the test of more trace elements, and can replace part of imported atomic spectrum instruments. The method is widely applied to determination of heavy metals, noble metals and nonferrous metal elements in various fields such as metallurgy, mines, geological prospecting, emergency event processing, petrochemical industry, light industry, agriculture and forestry, soil and fertilizer, environmental protection, feed, biology, medicine, health care control, scientific research, teaching, food, health care products, environment, electronic and electric appliances and the like.
The array flame converging atomizer is a core component of an atomization system of a flame atomic fluorescence spectrometer, and is used for enabling sample elements to be atomized in an atomization flame. The existing double-layer multi-head flame burner of the flame atomic fluorescence spectrometer on the market has the following defects: 1. the technology adopts a purely manual technology, the whole burner is of an integrated structure, the processing efficiency is low, and the mass production is difficult. 2. The angles of the combustion heads (the four combustion heads are converged towards the center) are difficult to keep consistent, and when the angles are inconsistent, the large flame structure composed of small flames is asymmetric, so that the atomization efficiency is affected. 3. The sizes of the air inlets of the combustion heads are difficult to keep consistent, tempering is easy to cause when the sizes of the air inlets of the combustion heads are inconsistent, explosion is generated in a transmission chamber, and dangers exist; when the sizes of the air inlets of the combustion heads are inconsistent, the sizes of the small flames are inconsistent, so that a large flame structure formed by the small flames is asymmetric, and atomization efficiency is affected. 4. The position of the auxiliary gas inlet hole is unreasonable, the auxiliary gas adopts a mode of surrounding the combustion head, and the auxiliary gas surrounds and protects the big flame and simultaneously influences the stability of the big flame from the bottom of the big flame at the center of a circle.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an array flame converging atomizer for a flame atomic fluorescence spectrometer, which has high atomization efficiency, stable atomization flame, and can be quantitatively produced.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an array flame converging atomizer for a flame atomic fluorescence spectrometer, comprising: the device comprises a fixed sleeve, an atomizer array combustion core, an air hole array seat, a shielding cylinder and an auxiliary air pipeline; the bottom of the fixed sleeve is provided with a connecting port for connecting with an atomization system transmission chamber, and the top of the fixed sleeve is connected with the bottom of the atomizer array combustion core; the bottom of the air hole array seat is sleeved on the outer side of the upper part of the fixed sleeve, the top of the air hole array seat is connected with the bottom of the shielding cylinder, the shielding cylinder is positioned outside the atomizer array combustion core, and a distance is reserved between the shielding cylinder and the atomizer array combustion core; a circle of grooves are formed in the inner side of the middle position of the air hole array seat, and an auxiliary air passage is formed by the grooves and the outer side wall of the bottom of the atomizer array combustion core; the auxiliary gas pipeline is arranged on one side of the air hole array seat and is connected with the auxiliary gas passage; a plurality of auxiliary air holes are arranged above the auxiliary air passage at intervals on the air hole array seat.
Further, the fixed sleeve adopts an inverted T-shaped structure, the transverse end of the fixed sleeve is used for being connected with the transmission chamber, and the vertical end of the fixed sleeve is used for being connected with the atomizer array combustion core.
Further, the air hole array seat adopts a hollow structure, and the atomizer array combustion core penetrates through the hollow part of the air hole array seat after being connected with the fixed sleeve; connecting grooves are formed in two ends of the air hole array seat, the bottom of the connecting groove is sleeved outside the vertical end of the fixed sleeve, and the top of the connecting groove is used for embedding the shielding cylinder; the auxiliary air passage is positioned on the air hole array seat between the two connecting grooves; the auxiliary air holes are uniformly distributed in the top connecting groove of the air hole array seat and are positioned between the shielding cylinder and the atomizer array combustion core.
Further, a through hole is formed in one side of the air hole array seat, and the auxiliary air pipeline is connected with the auxiliary air pipeline through the through hole.
Further, a first combustion head is arranged at the central position of the atomizer array combustion core, a plurality of second combustion heads are arranged around the first combustion heads at intervals, the second combustion heads and the first combustion heads are all arranged vertically, gas and sample aerosol passing through the first combustion heads and the second combustion heads form display flames, and the array flames are converged to form atomized flames.
Further, the second combustion heads are uniformly distributed in a circular shape.
Further, the first combustion head and the second combustion head are both in cylindrical structures; the diameter of the first combustion head is larger than or equal to that of the second combustion head.
Further, the first combustion head and the second combustion head are manufactured by machining.
Further, the radius setting method of the first combustion head and the second combustion head and the radius setting method of the atomizer array combustion core are as follows: 1) When the diameters of the first combustion head and the second combustion head are equal, the apertures of the first combustion head and the second combustion head are set according to various flame performance tables in analytical chemistry handbook-spectral analysis, and meanwhile, the array flame meets the combustion condition, and the radiuses of the first combustion head and the second combustion head need to meet the following conditions:
in which Q 1 For air flow, Q 2 N is the total number of the first combustion head and the second combustion head, r 2 Radius for the first and second burner heads; 2) The atomized flame formed by combining the first combustion head and the second combustion head is not required to meet the combustion condition, otherwise, the atomized flame is larger than the outer diameter of the atomizer array combustion core, and the radius r of the atomizer array combustion core 1 One of the following two conditions needs to be satisfied:
condition one:
condition II:
further, when the number of the first combustion heads and the second combustion heads is 9, the air flow is 6000mL/min, and the gas flow is 200mL/min, the atomizer array combustsRadius r of the core 1 The value is 11mm, the radius value range of the first combustion head and the second combustion head is as follows: 2.11mm<r 2 <2.92mm。
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the atomizer array combustion core adopts a mechanical processing technology, the whole array flame converging atomizer is assembled by adopting the fixed sleeve, the atomizer array combustion core, the air hole array seat, the shielding cylinder and the auxiliary air pipeline, and the atomizer array combustion core has high processing efficiency and can be produced quantitatively. 2. According to the invention, the first combustion head and the second combustion head are vertically arranged, so that the combustion angle is kept uniform and vertically upwards, the second combustion head is circularly and uniformly distributed, the atomization flame structure composed of the display flames is ensured to be symmetrical, the atomization efficiency is improved, and the overall horizontal installation angle (rotation angle on the horizontal plane) of the flame atomizer is not limited. 3. The size of the air inlet of the atomizer array combustion core is consistent due to the machining mode, tempering is avoided, and safety is improved; the array flame of each combustion head is consistent in size, and the formed atomized flame is stable. 4. The invention adopts the auxiliary gas to surround the atomizer array combustion core, the auxiliary gas only surrounds the atomized flame, the array flame is not influenced, and the stability of the atomized flame is improved. 5. The invention adopts the display flame to form the atomization flame, so that the flame temperature is improved, and the atomization efficiency is further improved. 6. The atomizer array combustion core adopts a porous structure, namely, the atomizer array combustion core consists of a plurality of second combustion heads and first combustion heads, and the arrangement of the porous structure can average the influence caused by unstable flame of individual hole sites, so that the flame stability is further improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of an array flame and an atomized flame of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the invention provides an array flame converging atomizer for a flame atomic fluorescence spectrometer, which comprises a fixed sleeve 1, an atomizer array combustion core 2, an air hole array seat 3, a shielding cylinder 4 and an auxiliary air pipeline 5. The bottom of the fixed sleeve 1 is provided with a connecting port for being connected with an atomizer system transmission chamber, the top of the fixed sleeve 1 is connected with the bottom of the atomizer array combustion core 2, and gas and sample aerosol which are uniformly mixed in the transmission chamber enter the atomizer array combustion core 2 through the fixed sleeve 1. The bottom of the air hole array seat 3 is sleeved outside the upper part of the fixed sleeve 1, and the top of the air hole array seat 3 is connected with the bottom of the shielding cylinder 4 and used for fixing the shielding cylinder 4. The shielding cylinder 4 is located outside the atomizer array combustion core 2, forms a sleeve structure with the atomizer array combustion core 2, and has a distance between the shielding cylinder 4 and the atomizer array combustion core 2 by the fixed sleeve 1 and the air hole array seat 3. A circle of grooves are formed in the inner side of the middle position of the air hole array seat 3, and the grooves and the outer side wall of the bottom of the atomizer array combustion core 2 form an auxiliary air passage 6; the auxiliary air pipeline 5 is arranged on one side of the air hole array seat 3 and is connected with the auxiliary air channel 6. The auxiliary air holes 7 are further formed in the air hole array base 3 at intervals and are communicated with the auxiliary air passages 6, and auxiliary air is uniformly conveyed into the space between the atomizer array combustion core 2 and the shielding cylinder 4 and does not enter the interior of the atomizer array combustion core 2. Wherein the auxiliary gas is air.
In the above embodiment, the fixing sleeve 1 adopts an inverted T-shaped structure, the lateral end of which is used for connecting with the transmission chamber, and the vertical end is used for connecting with the atomizer array combustion core 2.
In each of the above embodiments, the air hole array seat 3 has a hollow structure, and the atomizer array combustion core 2 is connected to the fixing sleeve 1 and then passes through the hollow portion of the air hole array seat 3. The two ends of the air hole array seat 3 are respectively provided with a connecting groove, the bottom connecting groove is sleeved outside the vertical end of the fixed sleeve 1, and the top connecting groove is used for embedding the shielding cylinder 4; the auxiliary air passage 6 is positioned on the air hole array seat 3 between the two connecting grooves. The auxiliary air holes 7 are uniformly distributed in the top connecting groove of the air hole array seat 3 and are positioned between the shielding cylinder 4 and the atomizer array combustion core 2.
In each of the above embodiments, a through hole is provided at one side of the air hole array base 3, and the through hole is communicated with the auxiliary air pipeline 5; the auxiliary gas pipeline 5 is connected with the auxiliary gas passage 6 through a through hole.
In each of the above embodiments, as shown in fig. 3, a first combustion head 8 is disposed at the center of the atomizer array combustion core 2, a plurality of second combustion heads 9 are disposed around the first combustion head 8 at intervals, each of the second combustion heads 9 and the first combustion heads 8 are disposed vertically, the gas passing through the first combustion heads 8 and the second combustion heads 9 and the sample aerosol form a display flame 10, the array flame is converged to form an atomized flame 11, the array flame and the atomized flame 11 are protected by the shielding tube 4, the shielding flame is contacted with the external gas, and the auxiliary gas 12 enters the space between the shielding tube 4 and the atomizer array combustion core 2 through a plurality of auxiliary gas holes 7, surrounds around the atomized flame 11, and does not enter the inside of the atomized flame 11, so that the flame shape and flame stability of the atomized flame 11 can be protected. Wherein, the number of the second combustion heads 9 is even, and the second combustion heads are uniformly distributed in a round shape, so that the flame is more stable. In a preferred embodiment, the number of second combustion heads 9 is eight.
In the above embodiment, the first combustion head 8 and the second combustion head 9 each have a cylindrical structure; the diameter of the first combustion head 8 is equal to or larger than the diameter of the second combustion head 9.
In each of the above embodiments, the first combustion head 8 and the second combustion head 9 may be manufactured by machining.
In the above embodiment, the radii of the first combustion head 8 and the second combustion head 9 and the atomizer array combustion core 2 are set as follows:
1) When the diameters of the first combustion head 8 and the second combustion head 9 are equal, the diameters of the first combustion head 8 and the second combustion head 9 are set according to various flame performance tables (premixed flames) in analytical chemistry handbook-spectral analysis, and the array flames meet the combustion conditions, wherein the maximum combustion speed of air-propane mixed gas is 82cm/s and the minimum combustion speed is 43cm/s, and the radius r of the first combustion head 8 and the second combustion head 9 is the same 2 The following conditions need to be satisfied:
in which Q 1 For air flow, Q 2 For gas flow, n is the total number of first burner heads 8 and second burner heads 9, r 2 Is the radius of the first combustion head 8 and the second combustion head 9.
When the total number of the first combustion heads 8 and the second combustion heads 9 is 9, the air flow is 6000mL/min, the gas flow is 200mL/min, and the radius of the second combustion heads 9 is in the range of: 2.11mm<r 2 <2.92mm。
2) The atomized flame 11 formed by combining the first combustion head 8 and the second combustion head 9 is required to be in non-compliance with the combustion condition, otherwise, the atomized flame 11 is larger than the outer diameter of the atomizer array combustion core 2, and the radius r of the atomizer array combustion core 2 1 One of the following two conditions needs to be satisfied:
condition one:
condition II:
when the total number of the first combustion head 8 and the second combustion head 9 is 9, the air flow is 6000mL/min, the gas flow is 200mL/min, and the radius r of the atomizer array combustion core 2 is equal to 1 The value is 11mm.
When the device is used, after being uniformly mixed through a transmission chamber, gas and sample aerosol enter an atomizer array combustion core 2 through a fixed sleeve 1, are combusted above the atomizer array combustion core 2 to form array flames, the array flames are converged to form atomized flames 11, sample elements are atomized in the atomized flames 11, and then are irradiated by a hollow cathode lamp to excite and generate atomic fluorescence signals for measurement. Auxiliary gas enters between the atomizer array combustion core 2 and the shielding cylinder 4 through the air hole array seat 3, and the auxiliary air holes 7 in the air hole array seat 3 enable the auxiliary gas to uniformly surround the atomized flame 11, and meanwhile, the auxiliary gas does not enter the atomized flame 11, so that the flame shape and flame stability of the atomized flame 11 can be protected.
The foregoing embodiments are only illustrative of the present invention, and the structure, dimensions, placement and shape of the components may vary, and all modifications and equivalents of the individual components based on the teachings of the present invention should not be excluded from the scope of protection of the present invention.
Claims (8)
1. An array flame converging atomizer for a flame atomic fluorescence spectrometer, comprising: the device comprises a fixed sleeve, an atomizer array combustion core, an air hole array seat, a shielding cylinder and an auxiliary air pipeline; the bottom of the fixed sleeve is provided with a connecting port for connecting with an atomization system transmission chamber, and the top of the fixed sleeve is connected with the bottom of the atomizer array combustion core; the bottom of the air hole array seat is sleeved on the outer side of the upper part of the fixed sleeve, the top of the air hole array seat is connected with the bottom of the shielding cylinder, the shielding cylinder is positioned outside the atomizer array combustion core, and a distance is reserved between the shielding cylinder and the atomizer array combustion core; a circle of grooves are formed in the inner side of the middle position of the air hole array seat, and an auxiliary air passage is formed by the grooves and the outer side wall of the bottom of the atomizer array combustion core; the auxiliary gas pipeline is arranged on one side of the air hole array seat and is connected with the auxiliary gas passage; a plurality of auxiliary air holes are further arranged on the air hole array seat at intervals above the auxiliary air passage;
a first combustion head is arranged at the central position of the atomizer array combustion core, a plurality of second combustion heads are arranged around the first combustion head at intervals, the second combustion heads and the first combustion heads are vertically arranged, gas and sample aerosol passing through the first combustion heads and the second combustion heads form display flames, and the array flames are converged to form atomized flames;
the first combustion head and the second combustion head are both in cylindrical structures; the diameter of the first combustion head is larger than or equal to that of the second combustion head.
2. An array flame focusing atomizer for a flame atomic fluorescence spectrometer as recited in claim 1, wherein: the fixed sleeve adopts an inverted T-shaped structure, the transverse end of the fixed sleeve is used for being connected with the transmission chamber, and the vertical end of the fixed sleeve is used for being connected with the atomizer array combustion core.
3. An array flame focusing atomizer for a flame atomic fluorescence spectrometer as recited in claim 2, wherein: the air hole array seat adopts a hollow structure, and the atomizer array combustion core penetrates through the hollow part of the air hole array seat after being connected with the fixed sleeve; connecting grooves are formed in two ends of the air hole array seat, the bottom of the connecting groove is sleeved outside the vertical end of the fixed sleeve, and the top of the connecting groove is used for embedding the shielding cylinder; the auxiliary air passage is positioned on the air hole array seat between the two connecting grooves; the auxiliary air holes are uniformly distributed in the top connecting groove of the air hole array seat and are positioned between the shielding cylinder and the atomizer array combustion core.
4. An array flame focusing atomizer for a flame atomic fluorescence spectrometer as recited in claim 1, wherein: and one side of the air hole array seat is provided with a through hole, and the auxiliary air pipeline is connected with the auxiliary air pipeline through the through hole.
5. An array flame focusing atomizer for a flame atomic fluorescence spectrometer as recited in claim 1, wherein: the second combustion heads are uniformly distributed in a round shape.
6. An array flame focusing atomizer for a flame atomic fluorescence spectrometer as recited in claim 1, wherein: the first combustion head and the second combustion head are manufactured by machining.
7. An array flame focusing atomizer for a flame atomic fluorescence spectrometer as recited in claim 1, wherein: the radius setting method of the first combustion head and the second combustion head and the radius setting method of the atomizer array combustion core are as follows: 1) When the diameters of the first combustion head and the second combustion head are equal, the apertures of the first combustion head and the second combustion head are set according to various flame performance tables in analytical chemistry handbook-spectral analysis, and meanwhile, the array flame meets the combustion condition, and the radiuses of the first combustion head and the second combustion head need to meet the following conditions:
in which Q 1 For air flow, Q 2 N is the total number of the first combustion head and the second combustion head, r 2 Radius for the first and second burner heads; 2) The atomized flame formed by combining the first combustion head and the second combustion head is not required to meet the combustion condition, otherwise, the atomized flame is larger than the outer diameter of the atomizer array combustion core, and the radius r of the atomizer array combustion core 1 One of the following two conditions needs to be satisfied:
condition one:
condition II:
8. an array flame focusing atomizer for a flame atomic fluorescence spectrometer as recited in claim 7, wherein: when the first combustion headAnd when the number of the second combustion heads is 9, the air flow is 6000mL/min, the gas flow is 200mL/min, and the radius r of the atomizer array combustion core is the same as that of the first combustion head 1 The value is 11mm, the radius value range of the first combustion head and the second combustion head is as follows: 2.11mm<r 2 <2.92mm。
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| CN201710420187.4A CN107271383B (en) | 2017-06-06 | 2017-06-06 | Array flame converging atomizer for flame atomic fluorescence spectrometer |
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| CN201710420187.4A CN107271383B (en) | 2017-06-06 | 2017-06-06 | Array flame converging atomizer for flame atomic fluorescence spectrometer |
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| CN207336338U (en) * | 2017-06-06 | 2018-05-08 | 北京金索坤技术开发有限公司 | Array flame convergence type atomizer for NITRATE BY FLAME ATOMIC Fluorescence Spectrometer |
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| GB656090A (en) * | 1945-10-16 | 1951-08-08 | British Thomson Houston Co Ltd | Improvements in and relating to liquid fuel atomizing systems |
| FR2216566A1 (en) * | 1973-02-01 | 1974-08-30 | Electro Synthese Labo Electro | |
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| CN107271383A (en) | 2017-10-20 |
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