Hydrogenation method atomizer

Abstract

The utility model belongs to the technical field of atomizers, and discloses a hydrogenation atomizer which comprises an outer pipe, one end of the outer pipe is in a sharp mouth shape, a sample solution inlet, a reducing agent inlet and a carrier gas inlet are sequentially formed in the pipe wall of the other end of the outer pipe from the end to the inner side, and a reducing agent center pipe and a sample solution center pipe are arranged in the outer pipe. One end of the reducing agent central tube is fixed on the outer tube and located between the reducing agent inlet and the carrier gas inlet, the other end of the reducing agent central tube is in a sharp-mouth shape and overhangs to the inner side of the sharp-mouth end of the outer tube, one end of the sample solution central tube is fixed on the outer tube and located between the sample solution inlet and the reducing agent inlet, and the other end of the sample solution central tube overhangs into a tube cavity of the reducing agent central tube; a trumpet-shaped nozzle is arranged on the outer side of the sharp end of the outer pipe. A sample solution and a reducing agent are fully mixed at the tail end of the reducing agent central pipe for chemical reaction and then sprayed out from the sharp nozzle end of the outer pipe, so that the element testing sensitivity in plasma flame can be remarkably improved, and the defects of large volume and long pipeline of a hydrogenation method generator can be well overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of atomizers, in particular to a hydrogenation atomizer. Background Art

[0002] The hydrogenation method is widely used in the testing of elements such as arsenic As, selenium Se, antimony Sb, bismuth Bi, tin Sn, lead Pb, tellurium Te, germanium Ge, cadmium Cd, and mercury Hg. Taking mercury Hg as an example, in a hydrochloric acid (nitric acid) medium, potassium borohydride is used as a reducing agent to reduce divalent mercury to atomic mercury, which is then mixed with excess hydrogen and carrier gas (argon) and enters an atomizer. Hydrogen and argon form an argon-hydrogen flame under the action of a special ignition device, which atomizes the element to be tested. The outer electrons in the ground state transition to a higher energy level and radiate characteristic light in the process of returning to a lower energy level. The light intensity is proportional to the concentration of the element to be tested.

[0003] The atomizer is a key component of a hydrogenation generator. Existing atomizers consist of an air inlet and a liquid inlet. Their operating principle is as follows: the sample solution enters the atomizer through the liquid inlet of the liquid inlet tube, a constant flow of carrier gas enters the atomizer through the air inlet of the inlet tube, and a high-speed airflow passes through the atomizer nozzle, generating negative pressure. While extracting the sample solution, the airflow breaks the solution into a mist-like aerosol, which is then carried out of the nozzle and introduced into an analytical instrument for elemental composition determination. This results in a large size, long piping, and difficulty in cleaning for hydrogenation generators. Prolonged use can lead to sample contamination. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a hydrogenation atomizer.

[0005] The above technical purpose of the present utility model is achieved through the following technical solutions: a hydrogenation atomizer, comprising an outer tube, one end of the outer tube is in the shape of a pointed mouth, and the other end of the tube wall is sequentially arranged with a sample solution inlet, a reducing agent inlet, and a carrier gas inlet from the end to the inside, a reducing agent center tube and a sample solution center tube are arranged in the tube cavity of the outer tube, one end of the reducing agent center tube is fixed on the inner wall of the outer tube between the reducing agent inlet and the carrier gas inlet, and the other end is in the shape of a pointed mouth and cantilevers to the inside of the pointed mouth end of the outer tube, one end of the sample solution center tube is fixed on the inner wall of the outer tube between the sample solution inlet and the reducing agent inlet, and the other end is cantilevered into the tube cavity of the reducing agent center tube, and a trumpet-shaped nozzle is arranged on the outside of the pointed mouth end of the outer tube.

[0006] By adopting the above technical solution, an outer tube, a sample solution inlet, a reducing agent inlet, a carrier gas inlet, a reducing agent center tube and a sample solution center tube are provided. The sample solution and the reducing agent can be fully mixed at the end of the reducing agent center tube to undergo a chemical reaction before being ejected from the pointed end of the outer tube. In this way, the sensitivity of element testing can be significantly improved in a plasma flame, thereby effectively solving the shortcomings of the hydrogenation method generator, such as large size and long pipelines.

[0007] Furthermore, the diameter of the reducing agent central tube is smaller than the diameter of the outer tube, and the diameter of the sample solution central tube is smaller than the diameter of the reducing agent central tube.

[0008] By adopting the above technical solution, the diameter of the reducing agent central tube is smaller than the diameter of the outer tube, and the diameter of the sample solution central tube is smaller than the diameter of the reducing agent central tube, so that the reducing agent central tube is arranged in the lumen of the outer tube, and the sample solution central tube is arranged in the lumen of the reducing agent central tube.

[0009] Furthermore, the fixed ends of the reducing agent central tube and the sample solution central tube are fixedly connected to the inner wall of the outer tube via an annular sealing block.

[0010] By adopting the above technical solution, the fixed ends of the reducing agent central tube and the sample solution central tube are fixedly connected to the inner wall of the outer tube through the annular sealing block to prevent liquid and gas from leaking from the fixed ends.

[0011] Furthermore, the overhanging end of the sample solution central tube is overhanging to a position of two-thirds of the length of the reducing agent central tube.

[0012] By adopting the above technical solution, the overhanging end of the sample solution central tube is overhanged to two-thirds of the length of the reducing agent central tube, thereby leaving enough space in the reducing agent central tube for the sample solution and the reducing agent to fully mix and react.

[0013] Furthermore, a reducing agent liquid inlet pipe is provided at the reducing agent inlet, and a carrier gas inlet pipe is provided at the carrier gas inlet.

[0014] By adopting the above technical solution, a reducing agent liquid inlet pipe and a carrier gas inlet pipe are provided, which facilitates the introduction of the reducing agent solution and the carrier gas through the pipeline connection.

[0015] In summary, the utility model has the following beneficial effects: in this application, by setting the outer tube, the sample solution inlet, the reducing agent inlet, the carrier gas inlet, the reducing agent central tube and the sample solution central tube, the sample solution and the reducing agent can be fully mixed at the end of the reducing agent central tube to undergo a chemical reaction and then sprayed out from the pointed end of the outer tube. In this way, the sensitivity of element testing can be significantly improved in the plasma flame, thereby effectively solving the shortcomings of the hydrogenation generator with large volume and long pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of an embodiment of the present invention.

[0017] In the figure: 1, outer tube; 2, sample solution inlet; 3, reducing agent inlet; 4, carrier gas inlet; 5, reducing agent center tube; 6, sample solution center tube; 7, nozzle; 8, annular sealing block; 9, reducing agent liquid inlet pipe; 10, carrier gas inlet pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0019] like Figure 1 As shown, the embodiment of the present application discloses a hydrogenation atomizer, including an outer tube 1, a reducing agent central tube 5 and a sample solution central tube 6. One end of the outer tube 1 is in the shape of a pointed tip, and the other end of the tube wall is sequentially provided with a sample solution inlet 2, a reducing agent inlet 3, and a carrier gas inlet 4 from the end to the inside. Specifically, the sample solution inlet 2 is provided at the end of the outer tube 1 away from the pointed tip, and is connected to the sample solution through a pipeline. The sample solution is generally a sample solution with a 5% hydrochloric acid or nitric acid solution as a medium. The reducing agent inlet 3 is provided on the outer wall of the outer tube 1, and a reducing agent liquid inlet pipe 9 is provided at the reducing agent inlet 3. The reducing agent liquid inlet pipe 9 is connected to the reducing agent solution through a pipeline. The reducing agent solution is generally a 1.5% sodium borohydride or potassium borohydride solution. The carrier gas inlet 4 is provided on the side of the outer wall of the outer tube 1 opposite to the reducing agent inlet 3. The carrier gas inlet 4 is provided with a carrier gas inlet pipe 10. The carrier gas inlet pipe 10 is connected to an external carrier gas source through a pipeline. The carrier gas source is generally a mixed gas of hydrogen and argon. During manufacturing, the reducing agent inlet pipe 9, the carrier gas inlet pipe 10 and the outer tube 1 are integrally formed, so that there is no connection point between the reducing agent inlet pipe 9, the carrier gas inlet pipe 10 and the outer tube 1, thereby ensuring the overall sealing of the outer tube 1.

[0020] It is further configured that a reducing agent central tube 5 and a sample solution central tube 6 are provided in the tubular cavity of the outer tube 1, the diameter of the reducing agent central tube 5 is smaller than the diameter of the outer tube 1, and the diameter of the sample solution central tube 6 is smaller than the diameter of the reducing agent central tube 5. During arrangement, one end of the reducing agent central tube 5 is fixed to the inner wall of the outer tube 1 between the reducing agent inlet 3 and the carrier gas inlet 4 through an annular sealing block 8, and the annular sealing block 8 seals the reducing agent central tube 5 and the outer tube 1 to prevent liquid leakage. One end of the reducing agent central tube 5 is also cantilevered to the inner side of the pointed end of the outer tube 1 in a pointed shape. One end of the sample solution central tube 6 is fixed to the inner wall of the outer tube 1 between the sample solution inlet 2 and the reducing agent inlet 3 through an annular sealing block 8, and the annular sealing block 8 seals the sample solution central tube 6 and the outer tube 1 to prevent liquid leakage. The other end of the sample solution central tube 6 is cantilevered into the lumen of the reducing agent central tube 5, preferably to a position two-thirds of the length of the reducing agent central tube 5, to ensure that the sample solution and the reducing agent have sufficient space at the end of the reducing agent central tube 5 for thorough mixing. Thus, the sample solution enters from the sample solution inlet 2, passes through the sample solution central tube 6, and reaches the end of the reducing agent central tube 5 (i.e., the end of the reducing agent central tube 5 adjacent to the pointed end of the outer tube 1). The reducing agent enters the lumen of the outer tube 1 through the reducing agent inlet pipe 9 and the reducing agent inlet 3, and finally enters the reducing agent central tube 5 within the area formed by the fixed end of the sample solution central tube 6, the fixed end of the reducing agent central tube 5, and the outer wall of the sample solution central tube 6. The annular area between the reducing agent central tube 5 and the sample solution central tube 6 constitutes a reducing agent circulation channel. After reaching the end of the reducing agent central tube 5, the reducing agent is thoroughly mixed and reacted with the sample solution, and then sprayed toward the pointed end. Carrier gas enters through carrier gas inlet pipe 10 and carrier gas inlet 4. The inner wall of outer tube 1, the outer wall of reducing agent central tube 5, and an annular sealing block 8 at the fixed end of reducing agent central tube 5 form a carrier gas flow channel, along which the carrier gas flows toward the pointed end of outer tube 1. A trumpet-shaped nozzle 7 is positioned outside the pointed end of outer tube 1. The high-speed carrier gas generates negative pressure at the pointed end of outer tube 1, breaking the mixed solution of sample solution and reducing agent into a mist-like aerosol, which is then ejected from trumpet-shaped nozzle 7. This significantly improves the sensitivity of elemental testing in a plasma flame, effectively addressing the shortcomings of hydrogenation generators, such as the large size and long pipelines.

[0021] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A hydrogenation atomizer, comprising an outer tube (1), characterized in that: One end of the outer tube (1) is in the shape of a pointed mouth, and a sample solution inlet (2), a reducing agent inlet (3), and a carrier gas inlet (4) are sequentially arranged on the tube wall of the other end from the end to the inside. A reducing agent central tube (5) and a sample solution central tube (6) are arranged in the tube cavity of the outer tube (1). One end of the reducing agent central tube (5) is fixed on the inner wall of the outer tube (1) between the reducing agent inlet (3) and the carrier gas inlet (4), and the other end is in the shape of a pointed mouth and is suspended to the inner side of the pointed mouth end of the outer tube (1). One end of the sample solution central tube (6) is fixed on the inner wall of the outer tube (1) between the sample solution inlet (2) and the reducing agent inlet (3), and the other end is suspended to the tube cavity of the reducing agent central tube (5). A trumpet-shaped nozzle (7) is arranged on the outer side of the pointed mouth end of the outer tube (1).

2. A hydrogenation atomizer according to claim 1, characterized in that: The diameter of the reducing agent central tube (5) is smaller than the diameter of the outer tube (1), and the diameter of the sample solution central tube (6) is smaller than the diameter of the reducing agent central tube (5).

3. A hydrogenation atomizer according to claim 2, characterized in that: The fixed ends of the reducing agent central tube (5) and the sample solution central tube (6) are fixedly connected to the inner wall of the outer tube (1) via an annular sealing block (8).

4. A hydrogenation atomizer according to claim 3, characterized in that: The overhanging end of the sample solution central tube (6) is overhanging to a position of two-thirds of the length of the reducing agent central tube (5).

5. The hydrogenation atomizer according to claim 1, wherein: A reducing agent liquid inlet pipe (9) is provided at the reducing agent inlet (3), and a carrier gas inlet pipe (10) is provided at the carrier gas inlet (4).

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