Novel hydrofluoric acid-resistant mist chamber

Abstract

The utility model discloses a novel hydrofluoric acid-resistant fog chamber, which comprises a fog chamber with an upper opening and a lower opening, the upper opening of the fog chamber is a sample outlet, and the sample outlet is provided with a sample outlet pipe; a lower cover is arranged at a lower opening of the fog chamber, and the lower cover is provided with a liquid discharge pipe communicated with the interior of the fog chamber; the sample outlet and the liquid discharge pipe are in the same axial direction, and a hollow pipe inner column detachably connected to the sample outlet is arranged in the same axial direction; the side wall of the mist chamber is provided with a guide pipe communicated with the inner wall of the mist chamber, the guide pipe is connected with an atomizer through an adapter, the mist chamber is designed to be of a top-shaped structure, after the inner wall of the mist chamber is subjected to sodium treatment, the hydrophilicity of the inner wall of the mist chamber is improved, and similarly, large water drops on the inner wall of the mist chamber can be effectively intercepted through the arrangement of an inner column and a flow guide groove; large water drops are prevented from entering the sample outlet.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fog chamber, concretely relates to a novel hydrogen fluoride acid resistant fog chamber. BACKGROUND

[0002] In the field of chemical engineering, material science and mechanical manufacturing, the full spectrum direct reading type ICP spectrometer is a commonly used analytical instrument, which uses inductively coupled plasma to convert elements in the sample into detectable light signals, and determines the content of each element in the sample by measuring the intensity of these light signals. With the development of science and technology, the sales of full spectrum direct reading type ICP spectrometer are increasing, and its application range is also becoming more and more extensive, and the demand for some special devices is also increasing.

[0003] Although the existing hydrogen fluoride acid resistant fog chamber of the full spectrum direct reading type ICP spectrometer can meet the general use requirements, there are still some problems. First, although the existing fog chamber design can throw out the atmospheric aerosol particles and ensure that the aerosol is in the form of small particles, due to the uneven speed of the aerosol during rotation, some large particles may not be completely thrown out, thereby affecting the stability of the detection result. Secondly, although the existing hydrophilic surface treatment can avoid the aggregation of large particle aerosol into large water droplets on the inner wall, due to the limited treatment effect, the aggregation phenomenon may not be completely eliminated, thereby affecting the stability of the fog chamber. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the utility model provides a novel hydrogen fluoride acid resistant fog chamber, which is designed as a gyroscopic structure and the inner wall of the fog chamber is treated with sodium, thereby improving the hydrophilicity of the inner wall of the fog chamber. Similarly, the setting of the inner column and the flow guide groove can effectively intercept the large water droplets on the inner wall of the fog chamber, thereby preventing the large water droplets from entering the sample outlet.

[0005] The technical scheme of the utility model is as follows: a novel hydrogen fluoride acid resistant fog chamber, comprising a fog chamber with upper and lower openings, wherein the upper opening of the fog chamber is a sample outlet, and the sample outlet is provided with a sample outlet pipe; the lower opening of the fog chamber is provided with a lower cover, and the lower cover is provided with a liquid discharge pipe communicating with the inside of the fog chamber;

[0006] The sample outlet and the liquid discharge pipe are on the same axis, and a hollow tube inner column detachably connected to the sample outlet is arranged on the same axis.

[0007] The side wall of the fog chamber is provided with a guide pipe communicating with the inner wall of the fog chamber, and the guide pipe is connected to an atomizer through an adapter.

[0008] Further, the inner diameter of the upper opening is smaller than the inner diameter of the lower opening.

[0009] Further, the inner wall of the fog chamber is in a gyroscopic structure.

[0010] Further, the mist chamber is provided with a flow guide groove, which extends along the top of the mist chamber to the inner wall of the mist chamber.

[0011] Further, the flow guide groove provided on the inner wall of the mist chamber is located on one side of the guide pipe.

[0012] Further, the inner diameter of the sample outlet is greater than the inner diameter of the liquid discharge pipe.

[0013] Further, one end of the inner column is inserted into the sample outlet, and the other end of the inner column is located directly above the liquid discharge pipe, and the other end of the inner column is provided with a plurality of openings.

[0014] Further, the lower cover located at one end of the mist chamber is in a conical shape.

[0015] A new preparation method of a hydrogen fluoride acid-resistant mist chamber, comprising the following steps:

[0016] Step 1, selecting polytetrafluoroethylene as the main material of the mist chamber;

[0017] Step 2, preparing the inside of the mist chamber into a gyroscopic structure;

[0018] Step 3, selecting 40-mesh sand to spray the inner wall of the mist chamber, the inner wall of the lower cover, and the inner column of the hollow pipe;

[0019] Step 4, sodium treatment is performed on the inner wall of the mist chamber, the inner wall of the lower cover, and the inner column of the hollow pipe.

[0020] In step 4, the mist chamber made of polytetrafluoroethylene is soaked in a sodium solution for 1-10 minutes, and then washed with warm water.

[0021] The beneficial technical effects of the utility model are:

[0022] 1. The inside of the mist chamber is gyroscopic, so that the aerosol particles can be thrown out at a uniform speed during rotation, ensuring that the aerosol is uniformly small and improving the accuracy of the detection results.

[0023] The length of the inner column is close to the liquid outlet, which can make the droplets flow out along the sample outlet before accumulating into large droplets, improving the stability of the mist chamber.

[0024] 2. Sealing rings are provided at the connection of each component of the mist chamber to ensure the sealing of the mist chamber and the stability of the airflow pressure inside the mist chamber.

[0025] 3. A new hydrophilic surface treatment method is used for the inner wall of the mist chamber, which is first sprayed with 40-mesh sand and then subjected to sodium treatment, which can avoid the aggregation of large particle aerosols into large water droplets on the inner wall, improving the stability of the mist chamber.

[0026] 4. The detachable inner column design makes the fog chamber easier to manufacture and maintain, greatly reducing the operating cost of the full-spectrum direct-reading ICP spectrometer and improving its practicality;

[0027] The inner column is designed as a detachable module. When the inner column is not needed, the aerosol entering the sample outlet is larger, which can improve the sensitivity of the elements, effectively improve the excitation intensity of the elements, and allow more aerosols to enter the plasma. When the inner column is added, it prevents the aerosol from entering the sample inlet without swirling, better removes large water droplets, and improves the stability of the detection.

[0028] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the internal structure of the fog chamber of this utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the lower cover of this utility model;

[0032] Figure 4 This is a cross-sectional view of the present invention;

[0033] Figure 5 This is a comparative experimental diagram of this utility model.

[0034] The attached figures are labeled as follows:

[0035] 100. Fog chamber; 110. Sample outlet; 120. Sample outlet tube; 130. Guide tube; 140. Flow guide groove; 200. Lower cover; 210. Drain tube; 300. Adapter; 400. Inner column. Detailed Implementation

[0036] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0038] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship described in the embodiments and shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] like Figure 1 As shown, this utility model specifically relates to a novel hydrofluoric acid resistant mist chamber 100, comprising a mist chamber 100 with openings at both the top and bottom. The upper opening of the mist chamber 100 is a sample outlet 110, and the sample outlet 110 is provided with a sample outlet tube 120. The lower opening of the mist chamber 100 is provided with a lower cover 200, and the lower cover 200 is provided with a drain pipe 210 communicating with the inside of the mist chamber 100.

[0040] The sample outlet 110 and the drain pipe 210 are on the same axis, and a hollow tube inner column 400 that can be detachably connected to the sample outlet 110 is provided on the same axis.

[0041] The side wall of the mist chamber 100 is provided with a guide tube 130 that communicates with the inner wall of the mist chamber 100. The guide tube 130 is connected to the atomizer through an adapter 300.

[0042] It should be noted that the upper end of the atomization chamber 100 is connected to the sample outlet 110 and the sample outlet tube 120. The aerosol enters the next device through the sample outlet 110 and the sample outlet tube 120. The lower end of the atomization chamber 100 is provided with a lower cover 200, which can seal the atomization chamber 100. The lower cover 200 is provided with a drain pipe 210 to collect the large water droplets formed during the atomization process.

[0043] The atomizer (not shown in the figure) is connected to the mist chamber 100 via an adapter 300 and a guide tube 130. The atomizer is a relatively mature component in the prior art, so the principle of the atomizer will not be described in detail. The aerosol generated by the atomizer rotates along the inner wall of the mist chamber 100. Through rotation, large droplets, relatively large droplets, or not-too-large droplets in the aerosol are flung out, so that only uniform small droplets remain in the aerosol.

[0044] The aerosol enters the mist chamber 100 through the guide tube 130 and rotates along the inner wall of the mist chamber 100. During the rotation, large water droplets in the aerosol are thrown to the inner wall of the mist chamber 100. The aerosol containing uniform small water droplets has low mass and is more easily carried by the airflow through the inner column 400, the sample outlet 110 and the sample outlet tube 120 to enter the next device.

[0045] Aerosols containing large water droplets are recovered through a drain pipe 210. The drain pipe 210 is connected to a peristaltic pump that can only discharge a fixed volume of liquid per minute. The discharged liquid will re-form large droplets in the external pipe connected to the drain pipe 210.

[0046] Additionally, the detachable connection of the inner column 400 allows for greater aerosol entry into the sample outlet 110 when the inner column 400 is not needed, thus improving elemental sensitivity, effectively increasing elemental excitation intensity, and allowing more aerosol to enter the plasma. When the inner column 400 is added, less aerosol enters the sample outlet 110, better removing large water droplets and improving detection stability.

[0047] The inner diameter of the upper opening is smaller than that of the lower opening. The function of the upper opening is to discharge the sample, and the function of the lower opening is to seal with the lower cover 200.

[0048] The inner wall of the fog chamber 100 has a gyroscope-like structure. This gyroscope-like design effectively ensures that the aerosol rotates at a more uniform speed, thereby better ejecting aerosol particles containing large water droplets and ensuring that the aerosol also contains uniform small particles, thus improving the accuracy of the detection results.

[0049] The fog chamber 100 is provided with a guide groove 140, which extends along the top of the fog chamber 100 to the inner wall of the fog chamber 100. The guide groove 140 located on the inner wall of the fog chamber 100 is located on one side of the guide tube 130.

[0050] In this process, the aerosol enters the mist chamber 100 from the guide tube 130, rotates along the inner wall of the mist chamber 100, and finally concentrates at the guide groove 140. The guide groove 140 intercepts and guides the aerosol of large droplets.

[0051] The inner diameter of the sample outlet 110 is larger than the inner diameter of the drain pipe 210. The inner diameter of the sample outlet 110 is set so that small aerosol particles can be discharged evenly. Due to the presence of an external peristaltic pump, the drain pipe 210 can only discharge a fixed amount of liquid each time.

[0052] One end of the inner column 400 is inserted into the sample outlet 110, and the other end of the inner column 400 is located directly above the drain pipe 210. The other end of the inner column 400 is provided with multiple notches, which can effectively remove large particles of aerosol.

[0053] The lower cover 200 is located at one end of the mist chamber 100 and has a conical structure to collect the large water droplets that are guided, and a portion of them are discharged through the drain pipe 210.

[0054] A novel method for preparing a hydrofluoric acid mist-resistant chamber 100 includes the following steps:

[0055] Step 1: Select polytetrafluoroethylene as the main material of fog chamber 100;

[0056] Step 2: Fabricate the interior of the fog chamber 100 into a gyroscope-like structure;

[0057] Step 3: Use 40-mesh sand to sandblast the inner wall of the mist chamber 100, the inner wall of the lower cover 200, and the inner column of the hollow tube 400.

[0058] Step 4: Sodium treatment is performed on the inner wall of the fog chamber 100, the inner wall of the lower cover 200, and the inner column of the hollow tube 400.

[0059] The PTFE fog chamber 100 is immersed in sodium sulfide solution for 1-10 minutes and then rinsed with warm water. This forms a carbonized layer on the inner wall of the fog chamber 100, which effectively improves the hydrophilicity of the inner wall and can more thoroughly eliminate the problem of large aerosol particles accumulating on the inner wall to form large water droplets. This improves the stability of the fog chamber 100 during ICP analysis.

[0060] like Figure 5 As shown, the content of standard solutions in a standard solution was tested on an ICP-OES under the same conditions as a conventional sodium-treated hydrofluoric acid mist chamber, a hydrofluoric acid mist chamber with a new sodium-treated process, and an imported hydrofluoric acid mist chamber. The test focused on the relative standard deviation and its fluctuation, and the lower the value and fluctuation, the better.

[0061] Experimental data demonstrate that the fluctuation of the hydrofluoric acid resistant mist chamber using the sodium-based process is significantly improved compared to existing mist chambers; compared to imported mist chambers, we can also reach the advanced level abroad through structural and process improvements.

[0062] The above embodiments are merely specific implementations of this utility model, used to illustrate the technical solutions of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope disclosed in this utility model. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. A novel hydrofluoric acid mist resistant chamber, characterized in that, The system includes a mist chamber (100) with openings at both the top and bottom. The top opening of the mist chamber (100) is a sample outlet (110), and the sample outlet (110) is provided with a sample outlet tube (120). The bottom opening of the mist chamber (100) is provided with a lower cover (200), and the lower cover (200) is provided with a drain pipe (210) that communicates with the inside of the mist chamber (100). The sample outlet (110) and the drain pipe (210) are on the same axis, and a hollow tube inner column (400) is detachably connected to the sample outlet (110) on the same axis. The side wall of the mist chamber (100) is provided with a guide tube (130) that communicates with the inner wall of the mist chamber (100), and the guide tube (130) is connected to the atomizer through an adapter (300).

2. The novel hydrofluoric acid mist resistant chamber according to claim 1, characterized in that, The inner diameter of the upper opening is smaller than the inner diameter of the lower opening.

3. A novel hydrofluoric acid mist-resistant chamber according to claim 1, characterized in that, The inner wall of the fog chamber (100) has a gyroscope-shaped structure.

4. A novel hydrofluoric acid mist-resistant chamber according to claim 3, characterized in that, The fog chamber (100) is provided with a guide groove (140) that extends along the top of the fog chamber (100) to the inner wall of the fog chamber (100).

5. A novel hydrofluoric acid mist-resistant chamber according to claim 4, characterized in that, The guide groove (140) located on the inner wall of the fog chamber (100) is located on one side of the guide tube (130).

6. A novel hydrofluoric acid mist resistant chamber according to claim 1, characterized in that, The inner diameter of the sample outlet (110) is larger than the inner diameter of the drain pipe (210).

7. A novel hydrofluoric acid mist-resistant chamber according to claim 1, characterized in that, One end of the inner column (400) is inserted into the sample outlet (110), and the other end of the inner column (400) is located directly above the drain pipe (210), and the other end of the inner column (400) is provided with multiple notches.

8. A novel hydrofluoric acid mist-resistant chamber according to claim 1, characterized in that, The lower cover (200) is a cone-shaped structure located at one end of the fog chamber (100).

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