Self-preheating steam generator for Kjeldahl apparatus and Kjeldahl apparatus
By introducing a water replenishment mechanism controlled by preheating pipelines and liquid level sensors into the steam generator of Kjeldahl nitrogen detergent, the problem of unstable steam output is solved, ensuring the water temperature balance in the steam generator, and improving the experimental accuracy .
Patent Information
- Application Number
- CN202323604081.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2033-12-27
AI Technical Summary
The steam generator of the existing Kjeldahl nitrogen detergent instrument is unstable in the winter laboratory, and frequent water replenishment leads to a momentary drop in the steam output.
A self-preheating steam generator is designed. By setting up a preheating pipeline at the replenishment port, the liquid level sensor is used to control the replenishment of deionized water, ensuring that the replenished water is hot water close to the boiling state, and avoiding damage to the steam generator. The internal water temperature gradient balance.
It effectively improves the consistency of steam output, improves the accuracy of experimental results, avoids the instantaneous reduction of steam output, and maintains stable output even under low temperature conditions.
Smart Images
Figure CN222125197U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of Kjeldahl nitrogen analyzers, in particular to a self-preheating steam generator for a Kjeldahl nitrogen analyzer and a Kjeldahl nitrogen analyzer. Background Art
[0002] The Kjeldahl nitrogen analyzer is a basic instrument for determining the nitrogen content of a substance. It is owned in large quantities by the society. The steam generator is the core component of the Kjeldahl nitrogen analyzer, providing continuous steam for distillation.
[0003] At present, the steam generators used in Kjeldahl nitrogen analyzers sold on the market all have built-in electric heaters in the containers. The steam is led out through pipelines, and deionized water is directly pumped into the generator through the pipelines to replenish the evaporated water in the generator.
[0004] An internal structure commonly used in existing steam generators, deionized water directly enters the steam generator through the bottom water inlet, is heated by the electric heating tube to generate steam, and flows out from the outlet. Due to the limited capacity of the shell, it is necessary to replenish water by about 10mL every 20 seconds on average. After the replenishment action is completed, it can be clearly observed that the steam output will drop instantly. This situation is particularly obvious in laboratories with insufficient heating in winter. Utility Model Content
[0005] The utility model aims to provide a self-preheating steam generator for a Kjeldahl nitrogen analyzer and a Kjeldahl nitrogen analyzer, so as to alleviate the technical problem of unstable steam output in the prior art.
[0006] In a first aspect, an embodiment of the utility model provides a self-preheating steam generator for a Kjeldahl nitrogen analyzer, comprising a steam generator housing, an electric heating element and a preheating pipeline;
[0007] The top of the steam generator shell is provided with an air outlet, and the bottom of the steam generator shell is provided with a liquid replenishing port;
[0008] The electric heating element is arranged in the steam generator housing;
[0009] The preheating pipeline is arranged in the steam generator shell, and the preheating pipeline is located at the liquid replenishing port, and the preheating pipeline is close to the electric heating element.
[0010] In combination with the first aspect, the embodiment of the utility model provides a possible implementation of the first aspect, wherein the above-mentioned liquid replenishing port includes a first liquid replenishing port for connecting to the preheating pipeline and a second liquid replenishing port for connecting to the liquid level sensor;
[0011] The first fluid infusion port is located at an outer periphery of the second fluid infusion port.
[0012] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein a pagoda connector for facilitating pipe plugging is provided on the steam generator shell at the liquid replenishment port.
[0013] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein the number of the above-mentioned air outlets is multiple, and the multiple air outlets are located at the periphery of the electric heating element.
[0014] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein a pagoda joint for facilitating pipe plugging is provided on the steam generator shell at the air outlet.
[0015] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein the preheating pipeline is columnar, the liquid outlet of the preheating pipeline is opened on the side wall, and the liquid outlet faces the inner wall of the steam generator shell.
[0016] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein the number of the above-mentioned preheating pipelines is multiple, and the multiple preheating pipelines are all close to the electric heating element.
[0017] In combination with the first aspect, the embodiment of the utility model provides a possible implementation of the first aspect, wherein the above-mentioned electric heating element is installed on the top of the steam generator shell, and the heating part of the electric heating element is located inside the steam generator shell.
[0018] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein the heating portion of the above-mentioned electric heating element is spiral-shaped, and the preheating pipeline is arranged in the middle of the heating portion.
[0019] In a second aspect, an embodiment of the utility model provides a Kjeldahl nitrogen analyzer, including a self-preheating steam generator for the Kjeldahl nitrogen analyzer.
[0020] Beneficial effects:
[0021] The utility model provides a self-preheating steam generator for a Kjeldahl nitrogen analyzer, comprising a steam generator shell, an electric heating element and a preheating pipeline; an air outlet is provided at the top of the steam generator shell, and a liquid replenishing port is provided at the bottom of the steam generator shell; the electric heating element is arranged in the steam generator shell; the preheating pipeline is arranged in the steam generator shell, and the preheating pipeline is located at the liquid replenishing port and is close to the electric heating element.
[0022] Specifically, before the steam generator is operated, deionized water has been filled into the steam generator shell, and the liquid level of the deionized water is located at the upper part of the electric heating element, leaving a distance from the top air outlet (this distance is determined by the setting of the external liquid level sensor); after the electric heating element is powered on, the electric heating element is continuously heated, and the deionized water in the steam generator shell is heated to a boiling state, and the steam generated thereby is discharged from the steam generator shell through the top air outlet. As the steam is continuously discharged, the liquid level inside the steam generator shell decreases. When the low liquid level triggers the external liquid level sensor, the water replenishment pump is controlled to start, and the deionized water enters the built-in preheating pipeline through the water pump and the liquid replenishment port. The deionized water that has been fully heat exchanged and stored in the preheating pipeline flows into the steam generator shell through the liquid outlet of the preheating pipeline. At this point, a water replenishment action is completed, and the water replenished by the preheating pipeline is hot water close to the boiling state, which will not reduce the temperature of the liquid inside the steam generator shell and will not destroy the boiling state, and has a positive positive effect on the continuous output of steam.
[0023] The utility model provides a Kjeldahl nitrogen analyzer, including a self-preheating steam generator for the Kjeldahl nitrogen analyzer. The Kjeldahl nitrogen analyzer has the above advantages compared with the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 A schematic diagram of the structure of a self-preheating steam generator for a Kjeldahl nitrogen analyzer provided in an embodiment of the utility model;
[0026] Figure 2 A half-section schematic diagram of a self-preheating steam generator for a Kjeldahl nitrogen analyzer provided in an embodiment of the utility model;
[0027] Figure 3 The present invention is a schematic diagram of the interior of a self-preheating steam generator for a Kjeldahl nitrogen analyzer provided in an embodiment of the present invention.
[0028] icon:
[0029] 100 - steam generator shell; 110 - air outlet; 120 - liquid replenishing port; 121 - first liquid replenishing port; 122 - second liquid replenishing port;
[0030] 200 - electric heating element; 210 - heating part;
[0031] 300 - preheating pipeline; 310 - liquid outlet. DETAILED DESCRIPTION
[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0037] See also Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides a self-preheating steam generator for a Kjeldahl nitrogen analyzer, including a steam generator shell 100, an electric heating element 200 and a preheating pipeline 300; an air outlet 110 is opened at the top of the steam generator shell 100, and a liquid replenishing port 120 is opened at the bottom of the steam generator shell 100; the electric heating element 200 is arranged in the steam generator shell 100; the preheating pipeline 300 is arranged in the steam generator shell 100, and the preheating pipeline 300 is located at the liquid replenishing port 120, and the preheating pipeline 300 is close to the electric heating element 200.
[0038] Specifically, before the steam generator is operated, deionized water has been filled into the steam generator housing 100, and the liquid level of the deionized water is located at the upper part of the electric heating element 200, leaving a distance from the top air outlet 110 (this distance is determined by the setting of the external liquid level sensor); after the electric heating element 200 is powered on, the electric heating element 200 is continuously heated, and the deionized water in the steam generator housing 100 is heated to a boiling state, and the steam generated thereby is discharged from the steam generator housing 100 through the top air outlet 110. As the steam is continuously discharged, the liquid level inside the steam generator housing 100 increases. When the low liquid level triggers the external liquid level sensor, the water replenishment pump is controlled to start, and the deionized water enters the built-in preheating pipeline 300 through the water pump and the replenishment port 120. The deionized water that has been fully heat exchanged and stored in the preheating pipeline 300 flows into the steam generator shell 100 through the liquid outlet 310 of the preheating pipeline 300. At this point, a water replenishment action is completed, and the hot water replenished by the preheating pipeline 300 is close to boiling water, which will not reduce the temperature of the liquid inside the steam generator shell 100 and will not destroy the boiling state, which has a positive effect on the continuous output of steam.
[0039] It should be pointed out that a preheating pipeline 300 is provided inside the steam generator shell 100, and there is always about 20mL of liquid stored inside the preheating pipeline 300. This preheating pipeline 300 is close to the electric heating element 200 and immersed in boiling hot water, and can fully exchange heat with the boiling water inside the steam generator shell 100; during the water replenishment action, the pumped cold water first pushes the water stored in the preheating pipeline 300 out from the liquid outlet 310 of the side wall, rather than being directly injected into the steam generator shell 100 from the liquid replenishment port 120, so there will be no room temperature cold water injected from the bottom that will immediately break the water temperature gradient balance inside the steam generator, causing the boiling water in the upper layer to be stirred to the warm water layer at the bottom layer, thereby suspending the boiling state. The water replenished into the steam generator shell 100 in this embodiment is all hot water close to boiling. It has been verified that even in a room close to 2°C, water replenishment will not cause an instantaneous reduction in steam, which can effectively improve the continuity of steam output and improve the accuracy of experimental results.
[0040] The electric heating element 200 may be an electric heating tube. In addition, those skilled in the art may select the type of the electric heating element 200 according to actual needs, which will not be described in detail here.
[0041] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the liquid inlet 120 includes a first liquid inlet 121 for connecting to the preheating pipeline 300 and a second liquid inlet 122 for connecting to the liquid level sensor; the first liquid inlet 121 is located on the periphery of the second liquid inlet 122 .
[0042] Among them, a pagoda connector for facilitating pipe plugging is provided at the liquid replenishment port 120 on the steam generator shell 100.
[0043] Specifically, the first liquid infusion port 121 for liquid infusion is distinguished from the second liquid infusion port 122 for connecting the liquid level sensor to avoid adverse effects on the liquid level sensor during the liquid infusion process. In addition, pagoda connectors are provided at the first liquid infusion port 121 and the second liquid infusion port 122, so that the experimenter can easily install the water pipe at the first liquid infusion port 121 and the second liquid infusion port 122.
[0044] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, there are multiple air outlets 110 , and the multiple air outlets 110 are located on the periphery of the electric heating element 200 .
[0045] Among them, a pagoda connector is provided at the air outlet 110 on the steam generator shell 100 for easy pipe plugging.
[0046] Specifically, the plurality of air outlets 110 are located on the periphery of the electric heating element 200 , so that when the water vapor is discharged, the water vapor inside the steam generator housing 100 can be discharged evenly.
[0047] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the preheating pipeline 300 is columnar, and the liquid outlet 310 of the preheating pipeline 300 is opened on the side wall, and the liquid outlet 310 faces the inner wall of the steam generator shell 100.
[0048] There are multiple preheating pipelines 300 , and all of the multiple preheating pipelines 300 are close to the electric heating element 200 .
[0049] Specifically, in order to increase the amount of liquid replenishment, multiple preheating pipelines 300 can be set, and the multiple preheating pipelines 300 are all close to the electric heating element 200, so that the room temperature liquid in the preheating pipeline 300 can quickly absorb heat.
[0050] In addition, the liquid outlet 310 of the preheating pipeline 300 is opened on the side wall, and the liquid outlet 310 faces the inner wall of the steam generator shell 100, so that the liquid discharged from the preheating pipeline 300 can first impact the inner wall of the steam generator shell 100, reducing the impact on the hot water inside the steam generator shell 100.
[0051] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the electric heating element 200 is installed on the top of the steam generator shell 100 , and the heating part 210 of the electric heating element 200 is located inside the steam generator shell 100 .
[0052] The heating portion 210 of the electric heating element 200 is spiral-shaped, and a preheating pipeline 300 is arranged in the middle of the heating portion 210 .
[0053] Specifically, a preheating pipeline 300 may be disposed in the middle of the heating portion 210 of the electric heating element 200 to further improve the heating rate of the preheating pipeline 300 .
[0054] This embodiment provides a Kjeldahl nitrogen analyzer, including a self-preheating steam generator for the Kjeldahl nitrogen analyzer.
[0055] Specifically, the Kjeldahl nitrogen analyzer provided in this embodiment has the advantages of the self-preheating steam generator for the Kjeldahl nitrogen analyzer described above compared with the prior art, which will not be described in detail here.
[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A self-preheating steam generator for a Kjeldahl nitrogen analyzer, characterized in that: include: A steam generator shell (100), an electric heating element (200) and a preheating pipeline (300); The top of the steam generator shell (100) is provided with an air outlet (110), and the bottom of the steam generator shell (100) is provided with a liquid replenishing port (120); The electric heating element (200) is arranged in the steam generator housing (100); The preheating pipeline (300) is arranged in the steam generator shell (100), and the preheating pipeline (300) is located at the liquid replenishing port (120), and the preheating pipeline (300) is close to the electric heating element (200).
2. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to claim 1, characterized in that: The liquid replenishing port (120) comprises a first liquid replenishing port (121) for connecting to the preheating pipeline (300) and a second liquid replenishing port (122) for connecting to a liquid level sensor; The first fluid replenishment port (121) is located on the periphery of the second fluid replenishment port (122).
3. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to claim 2, characterized in that: A pagoda connector for facilitating pipe connection is provided on the steam generator housing (100) at the liquid replenishment port (120).
4. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to claim 1, characterized in that: There are a plurality of air outlets (110), and the plurality of air outlets (110) are located on the periphery of the electric heating element (200).
5. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to claim 4, characterized in that: A pagoda joint for facilitating pipe plugging is provided on the steam generator shell (100) at the gas outlet (110).
6. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to claim 1, characterized in that: The preheating pipeline (300) is columnar, and a liquid outlet (310) of the preheating pipeline (300) is opened on a side wall, and the liquid outlet (310) faces the inner wall of the steam generator shell (100).
7. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to claim 6, characterized in that: There are multiple preheating pipelines (300), and the multiple preheating pipelines (300) are all close to the electric heating element (200).
8. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to any one of claims 1 to 7, characterized in that: The electric heating element (200) is installed on the top of the steam generator shell (100), and the heating part (210) of the electric heating element (200) is located inside the steam generator shell (100).
9. The self-preheating steam generator for Kjeldahl nitrogen analyzer according to claim 8, characterized in that: The heating portion (210) of the electric heating element (200) is spiral-shaped, and the preheating pipeline (300) is arranged in the middle of the heating portion (210).
10. A Kjeldahl nitrogen analyzer, characterized in that: The invention comprises the self-preheating steam generator for Kjeldahl nitrogen analyzer as described in any one of claims 1 to 9.