Nitrogen determination instrument for detecting nitrogen content
By introducing a buffer bottle and overflow pipe structure into the nitrogen analyzer, the problem of ammonia escaping due to non-liquefaction was solved, thus achieving both accuracy and safety in nitrogen content detection.
Patent Information
- Application Number
- CN202422967484.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-03
AI Technical Summary
In existing Kjeldahl nitrogen analyzers, some ammonia gas fails to liquefy completely during the ammonia condensation process and escapes, resulting in inaccurate test results and endangering human health.
A nitrogen analyzer for nitrogen content detection was designed, which adopts a collection bottle and a buffer bottle structure. Unliquefied ammonia gas is introduced into the buffer bottle through an overflow tube. The design of piston plate and spiral tube, combined with coolant, realizes the buffering and condensation of ammonia gas, which finally flows back into the collection bottle to react with the collection liquid.
It effectively prevents ammonia escape, improves the accuracy of test results, prevents ammonia from harming human health, and ensures the safety of the testing process.
Smart Images
Figure CN223581883U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nitrogen content detection technical field, especially in nitrogen content detection with nitrogen determination appearance. BACKGROUND
[0002] In the detection of nitrogen-containing products, it is usually necessary to detect the nitrogen content in the sample, such as soil, dairy products, feed, fertilizer and the like. The currently widely used nitrogen content detection method is the Kjeldahl method. The principle is to first digest the sample with acid to convert organic nitrogen into inorganic nitrogen; then distill the sample solution after digestion with alkali to convert inorganic nitrogen into ammonia gas; the ammonia gas is condensed into ammonia water and flows into a collection bottle containing a collection liquid; then a standard acid is titrated to calculate the nitrogen content in the sample. The collection bottle of the existing Kjeldahl apparatus is a wide-mouth bottle. If the ammonia gas generated during distillation is fast, part of the ammonia gas cannot be fully condensed and liquefied, resulting in the escape of part of the ammonia gas, which leads to inaccurate detection results and can harm human health. SUMMARY
[0003] The technical problem to be solved by the utility model is to provide a nitrogen content detection nitrogen determination appearance, which can prevent the escape of part of the ammonia gas, the detection result is more accurate, and the ammonia gas can be prevented from harming human health.
[0004] To solve the above technical problem, the technical scheme of the utility model is a nitrogen content detection nitrogen determination appearance, which comprises a collection bottle and a buffer bottle. A bottle plug is installed at the mouth of the collection bottle, one end of a gas overflow pipe penetrates through the bottle plug and is inserted into the collection bottle, and the other end is connected to the lower end of the buffer bottle. A piston plate is slidably installed in the inner cavity of the buffer bottle.
[0005] Further, the upper end of the piston plate is fixedly connected to a push rod, and the upper end of the push rod penetrates through the buffer bottle.
[0006] Further, a spiral pipe and a fixed plate are fixedly installed in the inner cavity of the buffer bottle. The lower end of the spiral pipe penetrates through the buffer bottle and is connected to one end of the gas overflow pipe. The upper end of the spiral pipe penetrates through the fixed plate.
[0007] Further, an opening for adding cooling liquid is formed in the side wall of the buffer bottle.
[0008] Further, it further comprises a distiller. A first conduit for passing hot steam, a liquid adding pipe for adding alkali, and a second conduit for leading out ammonia gas are inserted into the distiller. The second conduit is connected to the inner tube of the condenser. The other end of the inner tube is connected to a hose, and the other end of the hose is connected to a hard tube inserted into the collection bottle.
[0009] Further, the upper end of the liquid adding pipe is communicated with a liquid storage pipe, and a on-off valve is installed on the liquid adding pipe. Further, the upper end of the liquid adding pipe is communicated with a liquid storage pipe, and a on-off valve is installed on the liquid adding pipe.
[0010] Further, one end of the first conduit is connected with the air outlet pipe of the distillation bottle, and the distillation bottle is further communicated with a water adding pipe.
[0011] Further, the distillation bottle is installed on a support, and a heating lamp is arranged below the distillation bottle.
[0012] Further, the fixed plate and the piston plate are both flat plates, and the upper end of the spiral pipe is flush with the upper end of the fixed plate.
[0013] In another further scheme, the fixed plate and the piston plate are both concave plates with high periphery and low middle, and the upper end of the spiral pipe is flush with the upper end of the fixed plate.
[0014] The utility model has the advantages of:
[0015] The application prevents the ammonia gas from escaping and harming human health by installing the bottle plug on the bottle mouth of the collecting bottle, and the ammonia gas which is not completely liquefied enters the buffer bottle through the overflow pipe, and the pressure gradually increases to push the piston plate to rise as the ammonia gas continuously enters. The buffer bottle plays a buffering role, in addition, the ammonia gas is further cooled and liquefied in the buffer bottle, and finally returns to the collecting bottle to react with the collected liquid in the collecting bottle, so that the nitrogen content detection is more accurate. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the whole structure schematic view of example 1;
[0017] Figure 2 It is the internal structure schematic view of buffer bottle of example 2.
[0018] In the figure, 1-distillation bottle, 101-water adding pipe, 102-air outlet pipe, 2-distiller, 3-condenser, 301-inner pipe, 4-collecting bottle, 5-first conduit, 6-liquid adding pipe, 7-second conduit, 8-hose, 9-on-off valve, 10-liquid storage pipe, 11-heating lamp, 12-support, 13-overflow pipe, 14-buffer bottle, 15-spiral pipe, 16-fixed plate, 17-piston plate, 18-push rod. DETAILED DESCRIPTION
[0019] The specific embodiments of the utility model will be further described below in combination with the drawings. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute the limitation of the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.
[0020] Example 1
[0021] A nitrogen analyzer for detecting nitrogen content, such as Figure 1 As shown, it includes a collection bottle 4 and a buffer bottle 14; the bottle mouth of the collection bottle 4 is fitted with a bottle stopper, one end of the overflow pipe 13 passes through the bottle stopper and is inserted into the collection bottle 4, and the other end is connected to the lower end of the buffer bottle 14; a piston plate 17 is slidably installed in the inner cavity of the buffer bottle 14.
[0022] The nitrogen analyzer described above, used for nitrogen content detection, prevents the escape of incompletely liquefied ammonia gas by installing a stopper at the mouth of the collection bottle 4, thus preventing its harm to human health. The incompletely liquefied ammonia gas enters the buffer bottle 14 through the overflow pipe 13. As the ammonia gas continuously enters, the pressure gradually increases, pushing the piston plate 17 upward. The buffer bottle 14 acts as a buffer; furthermore, the ammonia gas is further cooled and liquefied within the buffer bottle 14, eventually flowing back into the collection bottle 4 to react with the collected liquid, making the nitrogen content detection more accurate.
[0023] Specifically, a push rod 18 is fixed to the upper end of the piston plate 17; the upper end of the push rod 18 passes through the buffer bottle 14. Pushing the push rod 18 downwards can push the liquefied ammonia water and unliquefied ammonia gas downwards, causing them to flow back into the collection bottle 4.
[0024] Specifically, in order to further improve the condensation and liquefaction effect of ammonia in the buffer bottle, a spiral tube 15 and a fixing plate 16 are fixedly installed in the inner cavity of the buffer bottle 14; the lower end of the spiral tube 15 passes through the buffer bottle 14 and is connected to one end of the overflow pipe 13; the upper end of the spiral tube 15 passes through the fixing plate 16.
[0025] Specifically, the buffer bottle 14 has an opening on its side wall for adding coolant. Coolant is introduced into the buffer bottle 14, and ammonia gas passes through the coolant via the spiral tube 15, achieving complete condensation and liquefaction. Stagnant coolant can be introduced into the buffer bottle 14, requiring only one opening. Alternatively, circulating coolant can be introduced into the buffer bottle 14, requiring two openings.
[0026] Specifically, it also includes a distiller 2; the distiller 2 is equipped with a first conduit 5 for introducing hot steam, a liquid addition pipe 6 for adding alkali, and a second conduit 7 for discharging ammonia; the second conduit 7 is connected to the inner tube 301 of the condenser 3, and the other end of the inner tube 301 is connected to a flexible tube 8, the other end of which is connected to a rigid tube inserted into the collection bottle 4.
[0027] Specifically, the upper end of the liquid addition pipe 6 is connected to the liquid storage pipe 10; an on / off valve 9 is installed on the liquid addition pipe 6. The alkali solution is placed in the liquid storage pipe 10, and the addition of the alkali solution is controlled by the on / off valve 9.
[0028] Specifically, one end of the first conduit 5 is connected to the gas outlet pipe 102 of the distillation flask 1, and the distillation flask 1 is also connected to a water inlet pipe 101.
[0029] Specifically, the distillation flask 1 is installed on the support 12; a heating lamp 11 is placed below the distillation flask 1.
[0030] Specifically, the fixed plate 16 and the piston plate 17 are both flat plates; the upper end of the spiral tube 15 is flush with the upper end of the fixed plate 16.
[0031] Example 2
[0032] A nitrogen content detector, as shown in Figure 2 Compared with Example 1, only the shapes of the fixed plate 16 and the piston plate 17 are different, and the rest of the structures are the same as those of Example 1. Specifically, the fixed plate 16 and the piston plate 17 are both concave plates with high periphery and low middle; the upper end of the spiral tube 15 is flush with the upper end of the fixed plate 16. Compared with Example 1, the fixed plate 16 and the piston plate 17 are designed as concave plates, which can facilitate the reflux of liquid ammonia.
[0033] Working principle of the utility model:
[0034] Before work, the digested sample solution is placed in the distiller 2, and then the entire device is assembled. The on-off valve 9 is opened, and the alkali stored in the liquid storage tube 10 is added to the distiller 2. The distillation flask 1 generates hot steam under heating, which enters the distiller 2 through the first conduit 5, and the inorganic nitrogen in the distiller 2 is distilled into ammonia gas, which enters the condenser 3 through the second conduit 7 and is condensed into ammonia water, which enters the collection bottle 4 and reacts with the collection liquid in the collection bottle 4. After the collection is completed, standard acid is used for titration, and then the nitrogen content in the sample is calculated.
[0035] If the ammonia gas generation speed is fast or the condensation effect is poor, part of the ammonia gas may not be liquefied, a stopper is installed at the mouth of the collection bottle 4, thereby preventing the escape of the ammonia gas that has not been completely liquefied and preventing its harm to human health; the ammonia gas that has not been completely liquefied enters the buffer bottle 14 through the overflow pipe 13, and as the ammonia gas continuously enters, the pressure gradually increases, which can push the piston plate 17 to rise. The buffer bottle 14 plays a buffering role, in addition, cooling liquid is introduced into the buffer bottle 14, the ammonia gas passes through the cooling liquid through the spiral tube 15, is condensed and liquefied, and finally reflows into the collection bottle 4 to react with the collection liquid in the collection bottle 4, so that the detection of the nitrogen content is more accurate.
[0036] The embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.
Claims
1. A nitrogen analyzer for detecting nitrogen content, characterized in that: Including collection bottle (4) and buffer bottle (14), the bottle mouth of collection bottle (4) is equipped with bottle plug, one end of overflow pipe (13) is inserted into collection bottle (4) through bottle plug, and the other end is connected with the lower end of buffer bottle (14), the inner chamber of buffer bottle (14) is slidably installed with piston plate (17).
2. The nitrogen content detection apparatus according to claim 1, characterized by: The upper end of piston plate (17) is fixedly connected with push rod (18), and the upper end of push rod (18) penetrates buffer bottle (14).
3. The nitrogen determination apparatus for detecting a nitrogen content according to claim 1, characterized by: The inner chamber of buffer bottle (14) is fixedly installed with spiral pipe (15) and fixed plate (16), the lower end of spiral pipe (15) penetrates buffer bottle (14) and is connected with one end of overflow pipe (13), and the upper end of spiral pipe (15) penetrates fixed plate (16).
4. The nitrogen content detection apparatus according to claim 3, wherein: The sidewall of buffer bottle (14) is provided with opening for adding cooling liquid.
5. The nitrogen content measuring apparatus according to any one of claims 1 to 4, characterized by: It also includes distiller (2), first conduit (5) for passing in hot steam, liquid adding pipe (6) for adding alkali and second conduit (7) for leading out ammonia gas are inserted in distiller (2), second conduit (7) is connected with inner tube (301) of condenser (3), the other end of inner tube (301) is connected with hose (8), and the other end of hose (8) is connected with hard pipe inserted into collection bottle (4).
6. The nitrogen content detection apparatus according to claim 5, wherein: The upper end of liquid adding pipe (6) is communicated with liquid storage pipe (10), and on-off valve (9) is installed on liquid adding pipe (6).
7. The nitrogen content detection apparatus according to claim 5, wherein: One end of first conduit (5) is connected with gas outlet pipe (102) of distillation bottle (1), and water adding pipe (101) is also communicated with distillation bottle (1).
8. The nitrogen content detection apparatus according to claim 7, wherein: Distillation bottle (1) is installed on support (12), and heating lamp (11) is placed below distillation bottle (1).
9. The nitrogen content detection apparatus according to claim 4, wherein: The fixed plate (16) and the piston plate (17) are both flat plates, and the upper end of the spiral pipe (15) is flush with the upper end of the fixed plate (16).
10. The nitrogen content detection apparatus according to claim 4, wherein: The fixed plate (16) and the piston plate (17) are both concave plates with high middle and low around, and the upper end of the spiral pipe (15) is flush with the upper end of the fixed plate (16). The fixed plate (16) and the piston plate (17) are both concave plates with high middle and low around, and the upper end of the spiral pipe (15) is flush with the upper end of the fixed plate (16).