Improved nitrogen distillate absorption device

Abstract

The utility model relates to an improved nitrogen distillate absorption device, which comprises a distillation flask, a splash-proof ball tube, a guide tube, a condensing tube and a conical flask with double connecting balls which are connected in sequence, and a dropping funnel is arranged between the distillation flask and the splash-proof ball tube, and is characterized in that the distillation flask is provided with a temperature control device, the guide tube is U-shaped, and the condensing tube is arranged in the conical flask. The conical flask with the double connecting balls is connected to the lower end of the condenser pipe, and the opening of the conical flask with the double connecting balls is S-shaped. The gas absorption and titration device is simple, clear and accurate, and solves the problems that in the prior art, the heating temperature is too high, the temperature control is unstable, and the heating is not uniform; the gas flow speed is too high, so that the absorption is incomplete; the solution absorbed by the conical flask is easy to splash out, and system errors are easy to generate, so that the test is accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to an improved nitrogen distillate absorption device and belongs to the field of chemical analysis. BACKGROUND

[0002] With the development of agriculture in China, the planting mode of crops has gradually changed from the past single fertilization mode to diversified fertilization mode, from the past "correct fertilization" to the present "balanced fertilization". This change makes agricultural production pay more attention to improving the quality and yield of agricultural products, and also puts forward higher requirements for the quality of fertilizer. Fertilizer, due to its reasonable proportion of various nutrient components, can meet the nutrient needs of different crops at different growth stages, and has become an indispensable part of modern agricultural production. Compared with traditional fertilizers, fertilizer can improve nutrient utilization rate, reduce fertilization frequency and reduce fertilization cost, so it has been widely concerned and applied by countries around the world. However, the accurate determination of nitrogen content in fertilizer has always been a challenge.

[0003] At present, the commonly used methods for determining the nitrogen content in fertilizer include combustion method, automatic sampling nitrogen determination instrument, Kjeldahl nitrogen determination and distillation titration method, etc. However, there are some problems in the existing determination methods. For example, in the design of the commonly used device, there is no temperature control and the use of electric heating jacket heating easily leads to local overheating; the straight-shaped conduit connected with the splash-proof ball tube and the condenser tube has too fast gas flow rate, which easily leads to incomplete absorption; the device port with double connected ball conical bottle is too shallow, which easily leads to solution splashing out, affecting the measurement accuracy and causing system error. These problems limit the accuracy and reliability of nitrogen content determination, hindering the improvement of fertilizer production quality.

[0004] Therefore, it is necessary to develop a new type of nitrogen distillate absorption device to solve the problems existing in the prior art and improve the accuracy and reliability of nitrogen content determination. The present application aims to improve the device design to improve the convenience and accuracy of operation, thereby providing technical support for the improvement of fertilizer production quality. SUMMARY

[0005] The present application aims to improve the accuracy and reliability of nitrogen content determination by improving the nitrogen distillate absorption device. By improving the device design, the determination error of nitrogen is reduced, and the absolute difference of parallel determination results is not greater than 0.25%.

[0006] Technical solution: An improved nitrogen distillate absorption device, comprising a distillation flask, a splash ball tube, a conduit, a condenser tube and a double ball conical flask connected in sequence, a dropping funnel is arranged between the distillation flask and the splash ball tube, characterized in that the distillation flask is provided with a temperature control device, the conduit is U-shaped, the double ball conical flask is connected to the lower end of the condenser tube, and the mouth of the double ball conical flask is S-shaped.

[0007] Further, the temperature control device comprises a temperature measuring and heating device.

[0008] Further preferably, the temperature measuring and heating device is a thermometer and an electric heating jacket.

[0009] Further preferably, the thermometer extends into the distillation flask.

[0010] Further preferably, the electric heating jacket is arranged at the bottom of the distillation flask.

[0011] Further, each component is made of corrosion-resistant and high-temperature-resistant material.

[0012] Further preferably, the thermometer is a heat-resistant glass thermometer, the distillation flask is a heat-resistant glass distillation flask, the dropping funnel is a heat-resistant glass dropping funnel, and the double ball conical flask is a heat-resistant glass double ball conical flask.

[0013] Further preferably, the splash ball tube is in a spherical structure or a glass ball tube with splash-proof device.

[0014] Further preferably, the conduit and the condenser tube are glass or stainless steel conduits and condensers.

[0015] The present application provides an improved nitrogen distillate absorption device for nitrogen content determination, which is used for the absorption of nitrogen distillate.

[0016] The device has appropriate size and structure of each component to ensure the convenience of operation and the accuracy of determination.

[0017] The device can reduce the determination error of nitrogen and realize the absolute difference of parallel determination results not greater than 0.25% through optimized design and accurate control of key parameters.

[0018] The improved nitrogen distillate absorption device for nitrogen content determination has the following beneficial effects:

[0019] (1) The solution absorption is complete, ensuring the accuracy of determination;

[0020] (2) The device is simple and clear in design, convenient to operate, and high in precision;

[0021] (3) The problems of uneven heating, unstable temperature control, too fast gas flow speed, incomplete absorption, easy spilling of absorption solution in the conical flask, and system error in the prior art device are solved, so that the test is more accurate;

[0022] (4) The reliability of nitrogen content determination is improved, so that the quality of fertilizer production is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic view of the connecting structure of the device.

[0024] In the figure, A is a distillation flask; B is a splash-proof bulb tube; C is a dropping funnel; D is a condenser tube; E is a conical flask with double connecting balls; F is an electric heating jacket; G is a thermometer; and H is a U-shaped conduit. DETAILED DESCRIPTION

[0025] The utility model will be described in detail below in combination with the drawings and examples. EMBODIMENT

[0026] An improved nitrogen distillate absorption device is used for the absorption of nitrogen distillate and mainly comprises distillation flasks A, splash-proof bulb tubes B, conduits, condenser tubes D and conical flasks E with double connecting balls connected in sequence, a dropping funnel C is arranged between the distillation flasks A and the splash-proof bulb tubes B, and the main improvement lies in that the distillation flasks A are provided with temperature control devices, the conduits are U-shaped conduits H, the conical flasks E with double connecting balls are connected to the lower ends of the condenser tubes D, and the mouths of the conical flasks with double connecting balls are S-shaped.

[0027] In the embodiment, the temperature control device comprises a temperature measuring and heating device, specifically a thermometer G and an electric heating jacket F. The thermometer G extends into the distillation flask A, and the electric heating jacket F is arranged at the bottom of the distillation flask A.

[0028] (1) Distillation flask

[0029] Material requirement: high-temperature-resistant and corrosion-resistant glass material, such as heat-resistant glass.

[0030] Capacity requirement: the capacity of the distillation flask should be able to adapt to the sample amount of the test object, and at the same time, the capacity size should be within a suitable range for the convenience of operation, 1000 mL.

[0031] (2) Thermometer

[0032] Material requirement: high-temperature-resistant and corrosion-resistant glass material, such as heat-resistant glass.

[0033] Size requirement: the length and temperature range of the thermometer should be able to ensure the temperature measurement range and not affect the convenience of operation.

[0034] (3) Splash-proof bulb

[0035] Material selection: Choose corrosion-resistant, not easy to break the material, such as glass or special alloy.

[0036] Structure design: The bulb should have splash-proof function to prevent test articles splash out, affect the accuracy of the determination, the special design of the spherical structure or with splash-proof device of the bulb.

[0037] (4) Dropping funnel

[0038] Material selection: Use corrosion-resistant, easy to clean materials, such as glass or special plastic.

[0039] Structure design: Dropping funnel has stable drop speed and precise drop control to ensure the accuracy and reproducibility of experimental operation.

[0040] (5) U-shaped conduit

[0041] Material selection: Choose corrosion-resistant, easy to clean materials, such as glass or stainless steel.

[0042] Structure design: Adopting conduit, improved into U-shaped, length and diameter should be able to ensure the smooth passage of gas, while not affecting the convenience of operation.

[0043] (6) Condenser tube

[0044] Material selection: Choose materials with good thermal conductivity and corrosion resistance, such as glass or stainless steel.

[0045] Size requirements: The length and diameter of the condenser tube should be able to ensure effective condensation of nitrogen distillate, while not affecting the convenience of operation.

[0046] (7) Double bulb conical flask with double connection

[0047] Material selection: Choose corrosion-resistant, high-temperature-resistant materials to ensure the safety and stability of experimental operation.

[0048] Structure design: Adopt double bulb conical flask with improved neck design, from straight to S-shaped. S-shaped neck design can effectively reduce solution splash, improve the accuracy and stability of the determination.

[0049] In the technical scheme of the embodiment, the test articles of the absorption device are subject to certain and limited, as follows:

[0050] (1) Concentration range: The concentration of nitrogen compounds in the test articles should be within a certain range to ensure the applicability of the device and the accuracy of the determination, the concentration range is between 0.1% and 10%;

[0051] (2) Property requirements: The device should be able to flow and produce nitrogen distillate. At the same time, the sample does not contain impurities or other chemical substances that affect the accuracy of the determination;

[0052] (3) Scope of application: This absorption device is suitable for determining the nitrogen content in liquid samples, but not limited to specific types of nitrogen compounds or liquid compound fertilizers. It has a wide range of applications, including nitrogen content determination in the fields of agriculture, chemical industry, etc.

[0053] The working process of this embodiment is as follows:

[0054] (1) Device assembly:

[0055] Prepare the distillation flask, thermometer, splash ball tube, dropping funnel, U-shaped conduit, condenser tube, and conical flask with double bulbs.

[0056] Insert the thermometer into the solution in the distillation flask, ensuring that the connection is sealed well.

[0057] Connect the splash ball tube to the top of the distillation flask, ensuring that the connection is sealed well.

[0058] Install the dropping funnel at the outlet of the splash ball tube, adjust the dripping speed, and ensure the accuracy of the dripping control.

[0059] Connect the U-shaped conduit to the outlet of the dropping funnel, ensuring that the gas passes through evenly.

[0060] Connect the condenser tube to the U-shaped conduit, ensuring that the condenser tube can effectively cool and liquefy the nitrogen distillate.

[0061] Connect the conical flask with double bulbs to the lower end of the condenser tube, ensuring that the connection is sealed tightly.

[0062] (2) Operation steps:

[0063] Place the liquid sample to be tested in the distillation flask, and start the heating device after the machine is set.

[0064] As the liquid sample is heated, control the temperature, and the nitrogen compounds are evaporated and sublimed along the inner wall of the distillation flask, then enter the splash ball tube.

[0065] In the splash ball tube, the nitrogen distillate contacts the absorption liquid in the dropping funnel, is absorbed and converted into liquid.

[0066] After the dripping control of the dropping funnel, the liquid nitrogen distillate flows through the U-shaped conduit, enters the condenser tube, and is cooled and liquefied in the condenser tube.

[0067] Finally, the liquid nitrogen distillate flows through the conical flask with double bulbs and is collected in the flask for further analysis.

[0068] (3) Key parameter settings:

[0069] Heating temperature: according to the nature of the test article and experimental requirements, set the power of the electric heating jacket, generally in the range of 1000w to 1500w.

[0070] Drop speed: according to the experimental requirements, adjust the drop speed of the drop funnel, generally in the range of 1 drop / s to 5 drops / s.

[0071] Absorption liquid concentration: select appropriate concentration of absorption liquid to ensure absorption efficiency and accurate measurement, generally 400g / L.

[0072] Analysis of experimental results:

[0073] Nitrogen determination error reduction: through multiple experimental verification, the results of using the nitrogen content determination device of the present application for determination show that the absolute difference of parallel determination results is not more than 0.25%. Compared with the allowable error, this difference is reduced by 0.05%, indicating that the device has significantly improved in determination accuracy.

[0074] Simple operation: the device adopts integrated design, the components are connected in turn, the operation process is clear and simple, without complex operation steps and adjustment, reducing the operation difficulty, improving the operation convenience and efficiency.

[0075] Determination: through experimental comparison and analysis, the nitrogen content determination results obtained by using the nitrogen content determination device of the present application have higher accuracy and reliability compared with the standard method. This is due to the optimized design of the device structure and the accurate control of the key parameters, ensuring the accuracy and reliability of the determination results.

Claims

1. An improved apparatus for absorbing nitrogen distillate comprising a distilling flask, a splash ball tube, a conduit, a condenser tube and a double bulb conical flask connected in series, a dropping funnel being provided between the distilling flask and the splash ball tube, characterized in that The distillation flask is provided with a temperature control device, the conduit is U-shaped, the double-bulb conical flask is connected to the lower end of the condenser tube, and the mouth of the double-bulb conical flask is S-shaped.

2. The nitrogen distillate absorption apparatus of claim 1, wherein The temperature control device comprises a temperature measuring and heating device.

3. The nitrogen distillate absorption apparatus of claim 2, wherein The temperature measuring and heating device is a thermometer and an electric heating jacket.

4. The nitrogen distillate absorption apparatus of claim 3, wherein The thermometer extends into the distillation flask.

5. The nitrogen distillate absorption apparatus of claim 3, wherein The electric heating jacket is placed at the bottom of the distillation flask.

6. The nitrogen distillate absorption apparatus of claim 1, 3, or 4, wherein The thermometer is a heat-resistant glass thermometer, the distillation flask is a heat-resistant glass distillation flask, the dropping funnel is a heat-resistant glass dropping funnel, and the double-bulb conical flask is a heat-resistant glass double-bulb conical flask.

7. The nitrogen distillate absorption apparatus of claim 1, wherein The splash-proof bulb tube is a spherical structure or a glass bulb tube with a splash-proof device.

8. The nitrogen distillate absorption apparatus of claim 1, wherein The conduit and the condenser tube are glass or stainless steel conduits and condensers.

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