Steam generator for nitrogen determination instrument and nitrogen determination instrument

Abstract

The utility model belongs to the technical field of steam generators, and provides a steam generator for a nitrogen determiner and the nitrogen determiner, comprising a steam generating pipeline and a heating device; the steam generating pipeline is arranged as a spiral pipeline, and the heating device is arranged in the spiral space of the steam generating pipeline; the steam generating pipeline is arranged as a spiral pipeline, and the heating device is arranged in the spiral space of the steam generating pipeline; the spiral pipeline ensures the heating time of pure water in the steam generating pipeline, and the heating device is arranged in the spiral space of the steam generating pipeline, which improves the heating effect, so that the pure water can sequentially experience three changes of cold state, saturated state and superheated state in the spiral pipeline, so that superheated steam is generated at the outlet of the steam generating pipeline, which is beneficial to the distillation operation; and the steam generator in the utility model does not need to be equipped with a pressure relief device, and has the characteristics of simple structure and small volume.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam generators, and in particular relates to a steam generator for a nitrogen determiner and the nitrogen determiner. Background Art

[0002] The Kjeldahl nitrogen determination experiment process includes four parts: digestion, distillation, absorption and titration. Among them, the main parts completed with the help of the Kjeldahl nitrogen analyzer are distillation, absorption and titration. During the experiment, distillation is a pre-treatment method in the experiment. It can be divided into many types according to the heating method and the carrier gas used. The Kjeldahl nitrogen analyzer belongs to steam distillation. A large amount of water vapor is generated by a steam generator. The water vapor can heat the sample in the flask to evaporate the ammonia; at the same time, the excess water vapor will form a positive pressure, driving the distilled target substance to enter the receiving cup after condensation.

[0003] The inventors found that only saturated steam can be generated, which is easy to condense and is not conducive to distillation operation; and the existing steam generator needs to be equipped with a pressure relief device, which has the disadvantages of complex structure, large size, large heat leakage and low energy efficiency. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a steam generator for a nitrogen analyzer and a nitrogen analyzer. The utility model has a simple and reliable structure, can generate superheated steam, improves heating efficiency, and is conducive to the realization of distillation operation in the nitrogen analyzer.

[0005] According to some embodiments, the first solution of the utility model provides a steam generator for a nitrogen analyzer, which adopts the following technical solution:

[0006] A steam generator for a nitrogen analyzer comprises a steam generating pipeline and a heating device;

[0007] The steam generating pipeline is configured as a spiral pipeline, and the heating device is configured in a spiral space of the steam generating pipeline.

[0008] Furthermore, the steam generating pipeline is elliptical and spiral.

[0009] Furthermore, the thermal device is a heating rod.

[0010] Furthermore, the heating rod is a U-shaped heating rod; two sides of the U-shaped heating rod are respectively located close to two focal positions of the elliptical spiral.

[0011] Furthermore, the steam generating pipeline and the heating device are arranged in the shell.

[0012] Furthermore, the shell is a casting structure.

[0013] Furthermore, a plurality of fixing holes are provided on the shell; the inlet and the outlet of the steam generating pipeline pass through different fixing holes and extend out of the shell.

[0014] Furthermore, the heating device is fixed on the shell.

[0015] Furthermore, the steam generating tube is made of corrosion-resistant material.

[0016] According to some embodiments, the second solution of the utility model provides a nitrogen determination instrument, which adopts the following technical solution:

[0017] A nitrogen analyzer adopts the steam generator for the nitrogen analyzer as described in the first aspect.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model configures a steam generating pipeline as a spiral pipeline, and configures a heating device in the spiral space of the steam generating pipeline; the spiral pipeline ensures the heating time of pure water in the steam generating pipeline, and the heating device is arranged in the spiral space of the steam generating pipeline, which improves the heating effect, so that the pure water can sequentially undergo three changes of cold state, saturated state and superheated state in the spiral pipeline, so that superheated steam is generated at the outlet of the steam generating pipeline, which is beneficial to the distillation operation; and the steam generator in the utility model does not need to be equipped with a pressure relief device, and has the characteristics of simple structure and small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a schematic diagram of the steam generation pipeline of the utility model;

[0022] Figure 2 It is a schematic diagram of the cooperation between the heating device and the steam generating pipeline of the utility model;

[0023] Figure 3 It is a schematic diagram of the housing of the utility model;

[0024] Figure 4 It is a cross-sectional view of the middle position of the housing of the utility model;

[0025] Wherein: 1. steam generation pipeline; 11. inlet; 12. outlet; 2. heating device; 3. shell; DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] Embodiment 1:

[0029] The steam generator in the traditional nitrogen analyzer can only produce saturated steam, which is easy to condense and is not conducive to distillation operation; and the existing steam generator needs to be equipped with a pressure relief device, which has the disadvantages of complex structure, large size, large heat leakage and low energy efficiency.

[0030] In response to the above problems, Figure 1 and Figure 2 As shown, this embodiment provides a steam generator for a nitrogen analyzer, comprising a steam generating pipeline 1 and a heating device 2;

[0031] The steam generating pipeline 1 is configured as a spiral pipeline, and the heating device 2 is configured in the spiral space of the steam generating pipeline 1 .

[0032] Specifically, the spiral pipeline ensures the heating time of the pure water in the steam generating pipeline 1, and the heating device 2 is arranged in the spiral space of the steam generating pipeline 1, which improves the heating effect, so that the pure water can undergo three changes of cold state, saturated state and superheated state in the spiral pipeline in sequence, so that superheated steam can be generated at the outlet 12 of the steam generating pipeline 1, which is beneficial to the distillation operation; and the steam generator in this embodiment does not need to be equipped with a pressure relief device, and has the characteristics of simple structure and small size.

[0033] Optionally, the inner diameter of the steam generating pipeline 1 is 1 cm to 3 cm, and the steam generating pipeline 1 is made of corrosion-resistant materials, such as glass tubes, stainless steel tubes or other corrosion-resistant flexible tubes. It can be understood that the steam generating pipeline 1 includes an inlet 11 and an outlet 12; the inlet 11 can be connected to a water supply device, which can be realized by existing equipment and is used to provide pure water for the steam generating pipeline 1, which will not be described in detail here; the outlet 12 can pass through the seal at the opening of the flask on the nitrogen analyzer to send water vapor into the flask, and heat the sample in the flask to evaporate ammonia.

[0034] The heating device 2 can be configured as a heating rod, such as a high-temperature circular electric heating tube or a U-shaped electric heating rod, etc. The heating of the heating rod by electricity can be achieved by using existing technology.

[0035] In order to improve the heating effect of the heating rod on the steam generating pipeline 1, in this embodiment, the steam generating pipeline 1 is set to an elliptical spiral shape, and the heating rod is a U-shaped heating rod; the two sides of the U-shaped heating rod are respectively located close to the two focal positions of the elliptical spiral.

[0036] Specifically, the two sides of the U-shaped heating rod are respectively located close to the two focal positions of the elliptical spiral, which can ensure that the distance between the heating rod and the wall of the steam generating pipeline 1 is small, and ensure the heating area of ​​the steam generating pipeline 1, thereby improving the heating effect.

[0037] In order to reduce the evaporation and loss of heat, in this embodiment, the steam generation pipeline 1 and the heating device 2 are arranged in the shell 3. It can be understood that the shell 3 is a closed shell. The heat provided by the heating device 2 flows in the closed shell 3. As the heating time increases, the gas temperature in the shell 3 continues to increase, and the steam generation pipeline 1 is efficiently heated.

[0038] Optionally, the shell 3 is a casting structure. Specifically, the shell 3 can be obtained by a cast aluminum process. In order to improve the sealing performance of the shell, a plurality of fixing holes are opened on the shell 3. The inlet 11 and the outlet 12 of the steam generating pipeline 1 pass through different fixing holes and extend out of the shell 3, and the two ends of the heating rod also pass through different fixing holes and extend out of the shell 3. When the steam generating pipeline 1 and the heating rod pass through the fixing holes, they can be fixed by welding, interference fit connection or adding sealing rings, etc., to ensure that there is no gap between the fixing holes and the pipe wall as much as possible.

[0039] The inlet 11 and the outlet 12 of the steam generating pipeline 1 pass through and are fixed in the fixing holes, and the two ends of the heating rod pass through and are fixed in the fixing holes, thereby achieving the fixation of the steam generating pipeline 1 and the heating device 2 on the shell 3.

[0040] The working process or principle of this embodiment is:

[0041] After pure water enters the inlet 11 of the steam generating pipeline 1, it passes through the spiral portion, and the heating device 2 heats the spiral portion of the steam generating pipeline 1, thereby heating the pure water in the pipe. The pure water undergoes three changes from cold state, saturated state and superheated state in the process of reaching the outlet 12 from the inlet 11; finally, the water vapor enters the flask on the nitrogen analyzer in a superheated state, heats the sample in the flask to evaporate ammonia, and realizes distillation.

[0042] Embodiment 2:

[0043] A nitrogen analyzer adopts the steam generator for the nitrogen analyzer as described in Example 1; it can be understood that the nitrogen analyzer also includes a part for completing absorption and titration. Specifically, the nitrogen analyzer in this embodiment can be obtained by replacing the steam generator in Example 1 with the steam generator in a traditional nitrogen analyzer, which will not be described in detail here.

[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A steam generator for a nitrogen analyzer, characterized in that: Including steam generation pipeline and heating device; The steam generating pipeline is configured as a spiral pipeline, and the heating device is configured in a spiral space of the steam generating pipeline.

2. A steam generator for a nitrogen analyzer as claimed in claim 1, characterized in that: The steam generating pipeline is in an elliptical spiral shape.

3. A steam generator for a nitrogen analyzer as claimed in claim 2, characterized in that: The thermal device is a heating rod.

4. A steam generator for a nitrogen analyzer as claimed in claim 3, characterized in that: The heating rod is a U-shaped heating rod; two sides of the U-shaped heating rod are respectively located close to two focal points of the elliptical spiral.

5. A steam generator for a nitrogen analyzer as claimed in claim 1, characterized in that: The steam generating pipeline and the heating device are arranged in the shell.

6. A steam generator for a nitrogen analyzer as claimed in claim 5, characterized in that: The shell is a casting structure.

7. A steam generator for a nitrogen analyzer as claimed in claim 5, characterized in that: The shell is provided with a plurality of fixing holes; the inlet and the outlet of the steam generating pipeline pass through different fixing holes and extend out of the shell.

8. A steam generator for a nitrogen analyzer as claimed in claim 5, characterized in that: The heating device is fixed on the shell.

9. A steam generator for a nitrogen analyzer as claimed in claim 1, characterized in that: The steam generating tube is made of corrosion-resistant material.

10. A nitrogen analyzer, characterized in that: The steam generator for the nitrogen analyzer as claimed in any one of claims 1 to 9 is used.

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