CN210465260U

CN210465260U - Coaxial atomization and ultrasonic atomization series atomization device

Info

Publication number: CN210465260U
Application number: CN201921265336.5U
Authority: CN
Inventors: 易慧; 吴文启; 谭微; 李奋; 胡雨欣
Original assignee: Lushan College of Guangxi University of Science and Technology
Current assignee: Lushan College of Guangxi University of Science and Technology
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-05-05
Anticipated expiration: 2029-08-07

Abstract

An atomization device with coaxial atomization and ultrasonic atomization in series connection comprises a fog chamber, a coaxial pneumatic atomizer and an ultrasonic atomization head and is used for atomizing an ICP-AES or ICP-MS test solution. The method is characterized in that: a coaxial pneumatic atomizer and an ultrasonic atomizing head are arranged on a fog chamber made of glass, and part of coarse fog drops of test solution sprayed by the coaxial pneumatic atomizer are atomized into fine fog drops on an ultrasonic energy conversion sheet of the ultrasonic atomizing head, so that the atomization efficiency is improved. The advantages of this device are: the pneumatic atomization device and the ultrasonic atomization device are used together, the two atomization devices are arranged in the same fog chamber, the increment of the ultrasonic atomization is adjustable, the detection sensitivity can be conveniently improved, and the ultrasonic atomization device is simple in structure, low in cost and convenient to maintain and use.

Description

Coaxial atomization and ultrasonic atomization series atomization device

Technical Field

The utility model relates to an atomizing device of coaxial atomizing and ultrasonic atomization series connection belongs to detection laboratory instrument subassembly.

Background

Inductively coupled plasma emission spectrometers/mass spectrometers (ICP-AES or ICP-MS) are common analytical instruments for chemical detection laboratories. The method comprises the steps of feeding liquid sample, atomizing by an atomizer, feeding the liquid sample into high-temperature plasma (ICP), and then carrying out emission spectrum analysis or mass spectrum analysis. The atomization rate of the atomizer is positively correlated to the sensitivity of the instrument. A common ICP atomizer is a coaxial pneumatic atomizer: the high-speed argon gas flow is sprayed out from the annular gap of the nozzle, and the test solution output from the capillary coaxially arranged in the middle of the nozzle is blown away and broken into mist. The atomizer has simple structure, stable performance and convenient use, but the atomization rate is generally less than 5 percent. At present, an ultrasonic atomizer is also available, the atomization rate of the ultrasonic atomizer is higher than that of a coaxial pneumatic atomizer, but the ultrasonic atomizer is complex in structure, high in price, difficult to maintain and repair and not wide in application.

Disclosure of Invention

The utility model discloses can partially keep and develop above-mentioned advantage and can overcome above-mentioned problem that exists, provide a coaxial atomizing and ultrasonic atomization tandem arrangement for ICP-AES or ICP-MS simple structure, stable performance, signal increment are adjustable, be convenient for with the replacement of current device.

The technical solution of the utility model is as follows.

1. The fog chamber is a spiral-flow type fog chamber, a coaxial pneumatic atomizer and an energy conversion sheet are arranged on the fog chamber, the aerial fog generated by the coaxial pneumatic atomizer is sprayed on the large silver surface of the energy conversion sheet, and the thick fog drops are refined into fine fog drops. When the coaxial pneumatic atomizer works, the liquid inlet amount of the coaxial pneumatic atomizer is 2mL/min, the effective diameter of the energy conversion sheet is 16mm and can resist corrosion, the fog chamber is made of glass and has a diameter of 50mm, and the distance from the nozzle of the coaxial pneumatic atomizer to the midpoint of the energy conversion sheet is 40 mm.

2. The energy conversion sheet is arranged at the top of the ultrasonic atomization head, and the output power of the driving circuit is adjustable within 0-100%; the small silver surface of the energy conversion sheet is cooled by circulating water.

The utility model discloses the same with prior art is: the test solution is atomized by using pneumatic atomization and ultrasonic atomization technologies.

The utility model discloses the characteristic different with prior art is: the pneumatic atomization and the ultrasonic atomization are used simultaneously, two atomization devices are arranged in the same fog chamber, the increment of the ultrasonic atomization is adjustable, the sensitivity of a detection instrument can be conveniently improved, and the ultrasonic atomization device is simple in structure, low in cost and convenient to maintain and use.

Drawings

Fig. 1 is a general schematic diagram of the present invention.

Fig. 2 is a schematic cross-sectional view a-a of fig. 1.

Fig. 3 is a schematic view of the connection of the components of the present invention.

In fig. 1 to 3, a mist chamber (1), a coaxial pneumatic atomizer (2), an ultrasonic atomizing head (3), a coaxial pneumatic atomizer socket (11), an ultrasonic atomizing head socket (12), an aerosol outlet (13), a waste liquid outlet (14), an O-ring (111), an energy conversion sheet (31), a silica gel sealing ring (32), an ultrasonic atomizing head housing (33), a circulating water inlet (34), a circulating water outlet (35), an energy conversion sheet driving lead (36) and a silica gel sealing sleeve (37).

Detailed Description

Referring to the shapes and structures of fig. 1 to 3, the following steps are performed.

1. A fog chamber 1: made of glass and provided with a coaxial pneumatic atomizer socket 11 and an ultrasonic atomizing head socket 12. An O-shaped ring 111 is arranged in the socket 11 of the coaxial pneumatic atomizer and can be tightly connected with the coaxial pneumatic atomizer 2; the socket 12 of the ultrasonic atomizing head is lined with a silica gel sealing sleeve 37 which can be tightly connected with the ultrasonic atomizing head 3. The upper part and the lower part of the fog chamber 1 are respectively provided with an air fog outlet 13 and a waste liquid outlet 14. The diameter of the mist chamber 1 is 50 mm.

2. Coaxial pneumatic atomizer 2: the diameter of the portion connected to the mist chamber 1 was 6mm, and the amount of the feed liquid was 2 mL/min.

3. Ultrasonic atomizing head 3: a cylindrical shell is made of hard plastics, a silica gel sealing ring 32 is arranged at the top end of the cylindrical shell, and an energy conversion sheet 31 with the effective diameter of 16mm is arranged in the ring; the bottom end is provided with a circulating water inlet 34 and a circulating water outlet 35, and a transducer driving lead 36 is also introduced from the bottom end.

4. The utility model discloses an use: the test solution is input into the coaxial pneumatic atomizer 2 through the peristaltic pump, is blown away by high-speed argon flow at a nozzle and is crushed into droplets with different sizes, and the droplets are sprayed to the energy conversion sheet 31 on the ultrasonic atomization head 3, and part of coarse droplets are refined into fine droplets; the aerial fog forms rotational flow in the fog chamber 1, the coarse fog drops collide with the inner wall of the fog chamber 1 to form a liquid film, and the liquid is collected and then discharged through a waste liquid outlet 14; the fine mist droplets flow with the gas flow from the mist outlet 13 to the ICP or after being desolventized by the desolventizing device to the ICP. Connection of circulating water inlet 34 and circulating water outlet 35: the cooling water is introduced from an ICP cooling water device through a throttle valve by using a flexible pipe or is separately provided by using a peristaltic pump. The large silver side of the transducer 31 is resistant to corrosion (e.g., coated with glass-ceramic material), and the small silver side is coated with an insulating material; the output power of the device can be adjusted at 0-100% according to the requirement of the host machine on the sensitivity, and the resonant frequency is 1.7 MHz.

Note that: if a desolventizing device is not arranged before the ICP, the increment of the measurement signal contributed by ultrasonic atomization is preferably adjusted to be about 1 time at most by adjusting the output power of the driving circuit, and a large amount of droplets of solvent enter the ICP, so that the measurement signal is unstable, and the ICP is even extinguished. If the desolventizing device is configured, the coaxial pneumatic atomizer 2 with large liquid inlet amount can be replaced, the peristaltic pump speed is high, the ultrasonic driving power is increased, and the detection limit can be reduced by one order of magnitude. When the concentration of the substance to be detected is high enough and the sensitivity is not improved by means of ultrasonic atomization, the output power of the driving circuit is adjusted to be 0, namely the ultrasonic atomization is stopped, and the whole device becomes a pure coaxial pneumatic atomization device. When the ultrasonic atomization head works, the circulating water inlet and outlet of the ultrasonic atomization head 3 are adjusted to be in a lower inlet and an upper outlet.

The coaxial pneumatic atomizer 2, the transducer plate 31 and the driving device thereof are commercially available and can be selected and matched as required.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and replacements made by those skilled in the art based on the present invention, including changes and replacements on other analytical instruments that need to atomize a sample solution, all belong to the protection scope of the present invention.

Claims

1. The utility model provides an atomizing device of coaxial atomizing and ultrasonic atomization series connection which characterized in that: a coaxial pneumatic atomizer (2) and an energy conversion sheet (31) are arranged on a fog chamber (1), a nozzle of the coaxial pneumatic atomizer (2) faces to a large silver surface of the energy conversion sheet (31), and the atomization effects of the coaxial pneumatic atomizer (2) and the energy conversion sheet (31) are connected in series; the fog chamber (1) is made of glass and has the diameter of 50 mm; the distance from the nozzle of the coaxial pneumatic atomizer (2) to the middle point of the energy conversion sheet (31) is 40 mm.