A distiller for detecting nitrogen content of milk powder

Abstract

This utility model belongs to the field of chemical reaction apparatus and discloses a distiller for detecting the nitrogen content of milk powder. It includes a housing, an internal structure for the reaction to proceed, four sets of support feet at the bottom, an operation panel on one side, a water inlet and a feed inlet at the top, a discharge inlet on the side of the housing near the operation panel, a cleaning inlet at the bottom, and clearance openings corresponding to a pressure balance tank and a condensate tank on the side of the housing away from the operation panel. The internal structure includes a steam generator, an alkalization distillation device, and a condensation device. This utility model has a compact and reasonable structural design, is electrically controlled, simple and convenient to use, and can prevent boiling over and negative pressure backflow, prevent excessive internal pressure, significantly improve experimental safety, and ensure stable experimental operation.

Description

Technical Field

[0001] This utility model relates to the field of chemical reaction apparatus, specifically a distillation apparatus for detecting the nitrogen content of milk powder. Background Technology

[0002] As an important nutritional supplement for infants, children, and even adults, the quality and safety of milk powder are of great concern. Among the various quality indicators of milk powder, the detection of nitrogen content is particularly crucial, as it directly relates to the determination of the protein content in the milk powder, thereby affecting consumers' health and rights.

[0003] Protein is one of the core nutrients in infant formula, playing an indispensable role in physiological processes such as growth and development, metabolism, and immune regulation. Infants and young children are in a rapid growth and development stage, and their need for protein is even more urgent. High-quality protein intake can support healthy physical and brain development. Therefore, accurately testing the nitrogen content in infant formula to determine the true protein content is a crucial step in ensuring formula quality.

[0004] Currently, the mainstream method for detecting nitrogen content in milk powder is the Kjeldahl method, which is operated according to the "GB 5009.5-2016 National Food Safety Standard - Determination of Protein in Food". However, the traditional Kjeldahl method has some limitations. On the one hand, the detection equipment is relatively complex, involving the coordinated operation of multiple devices and components. The operation procedure of the traditional detection method is cumbersome, requiring professional technicians to strictly follow the standard procedures. When preparing water vapor, boiling over is likely to occur, or excessive water vapor may be generated and not consumed in time, which may lead to an increase in gas pressure inside the device, potentially causing the container to rupture and creating a hazard. Furthermore, during the reaction, the sudden consumption of water vapor may create negative pressure, which can easily lead to backflow, and the sample may be drawn into the water vapor generating device, thus affecting the test results. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a distiller for detecting nitrogen content in milk powder, which solves the problems mentioned in the background art, such as boiling over, excessive pressure, and negative pressure backflow during the test.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a distiller for detecting nitrogen content in milk powder, comprising a device shell, an internal structure for reaction to be carried out inside the device shell, four sets of support feet at the bottom of the device shell, an operation panel on one side of the device shell, a water inlet and a feed pipe inlet at the top of the device shell, a discharge pipe inlet on the side of the device shell adjacent to the operation panel, a cleaning pipe inlet at the bottom of the device shell, and an avoidance opening corresponding to a pressure balance tank and a condensate tank on the side of the device shell away from the operation panel.

[0009] Preferably, the internal structure includes a steam generator, an alkalization distillation device, and a condenser. The water inlet is sealed to the steam generator, the output end of the steam generator is sealed to the alkalization distillation device, and a condenser is provided at the output end of the alkalization distillation device. The feed port and the discharge port are both sealed to the alkalization distillation device.

[0010] Preferably, the steam generating device includes a heating block, a clean water container, a gas supply pipe, a water inlet pipe, and a pressure relief structure. The water inlet pipe is sealed to the water inlet, and the other end of the water inlet pipe extends into the clean water container. A pipe valve is installed on the water inlet pipe. A heating block is installed at the bottom of the clean water container. The heating block and the pipe valve are electrically connected to the operation panel. A gas supply pipe is sealed to the top of the clean water container.

[0011] Preferably, the pressure relief structure includes a pressure relief pipe and a pressure balancing tank. The top of the water purification container is sealed with a pressure relief pipe, and the other end of the pressure relief pipe extends into the pressure balancing tank. The pressure balancing tank contains liquid, and the liquid level is higher than the opening of the pressure relief pipe. The pressure balancing tank is connected to the atmosphere.

[0012] Preferably, the alkalization distillation apparatus includes a reactor, a feeding pipe, a discharging pipe, and a cleaning pipe. The top of the reactor is sealed with the feeding pipe and the discharging pipe, and a pipe valve is installed on the feeding pipe. The bottom of the reactor is sealed with the cleaning pipe, and a pipe valve is installed on the cleaning pipe. The feeding pipe extends out of the device housing as a feeding port, the discharging pipe extends out of the device housing as a discharging port, and the cleaning pipe extends out of the device housing as a cleaning port.

[0013] Preferably, the condensation device includes a condensation sleeve, two sets of cold liquid circulation pipes, a condensate pool, and a liquid pump. The discharge pipe is fitted with a condensation sleeve, and a condensate pool is provided on one side of the condensation sleeve. The condensation sleeve and the condensate pool are sealed together by two sets of cold liquid circulation pipes. The ends of both sets of cold liquid circulation pipes are placed in the condensate pool, and a liquid pump is provided at the end of one set of cold liquid circulation pipes.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a distiller for detecting the nitrogen content of milk powder, which has the following beneficial effects:

[0016] 1. This distiller for detecting nitrogen content in milk powder is equipped with a steam generator, an alkalization distillation device, and a condenser. It can determine the nitrogen content in milk powder using the Kjeldahl method. The device is electrically controlled, simple and convenient to use, and can prevent boiling over and negative pressure backflow. It can also prevent excessive internal pressure, greatly improve the safety of the test, and ensure the stable conduct of the test.

[0017] 2. Equipped with a pressure relief structure, the pressure relief pipe can release water vapor from the pressure balance pool to the atmosphere when the pressure in the water container is too high after heating, which can prevent boiling over, prevent excessive steam production from causing excessive internal pressure and explosion, and prevent negative pressure backflow from affecting the test. It can greatly improve the safety of the test and ensure the stable conduct of the test.

[0018] 3. It is equipped with a control panel, multiple sets of pipeline valves and heating blocks. The electric control and resistance wire heating can prevent open flame hazards and improve the safety of the device. The heating power can be easily controlled by the knob. The device is easy to use. The electric control pipeline valves are simpler and more convenient to use than traditional hand-operated valves. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the steam generating device and the alkali distillation device of this utility model;

[0023] Figure 5 This is a schematic diagram of the condensation device of this utility model.

[0024] In the diagram: 1. Container casing; 2. Support legs; 3. Control panel; 4. Water inlet; 5. Feed inlet; 6. Discharge inlet; 7. Cleaning inlet; 8. Pressure balancing tank; 9. Condensate tank; 10. Steam generator; 11. Alkali distillation unit; 12. Condensation unit; 13. Heating block; 14. Clean water container; 15. Gas transmission pipeline; 16. Pressure relief pipeline; 17. Water inlet pipeline; 18. Pipeline valve; 19. Reactor; 20. Feed pipeline; 21. Discharge pipeline; 22. Cleaning pipeline; 23. Condensation sleeve; 24. Cold liquid circulation pipe; 25. Liquid pump. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 This utility model provides a technical solution:

[0027] A distiller for detecting nitrogen content in milk powder includes a housing 1, an internal structure for reaction, four sets of support feet 2 at the bottom of the housing 1, an operation panel 3 on one side of the housing 1, a water inlet 4 and a feed inlet 5 at the top of the housing 1, a discharge inlet 6 on the side of the housing 1 adjacent to the operation panel 3, a cleaning inlet 7 at the bottom of the housing 1, and a clearance opening on the side of the housing 1 away from the operation panel 3 corresponding to a pressure balance tank 8 and a condensate tank 9. The operation panel 3 includes multiple control switches and adjustment knobs to precisely adjust the output power of the heating block 13, and a distillate receiving bottle should be installed at the discharge inlet 6.

[0028] Furthermore, the internal structure includes a steam generator 10, an alkaline distillation apparatus 11, and a condenser 12. The water inlet 4 is sealed to the steam generator 10, and the output end of the steam generator 10 is sealed to the alkaline distillation apparatus 11. The condenser 12 is located at the output end of the alkaline distillation apparatus 11. The feed inlet 5 and the discharge inlet 6 are both sealed to the alkaline distillation apparatus 11. The steam generator 10 is used to generate steam, the alkaline distillation apparatus 11 is used for the alkaline distillation reaction, and the condenser 12 is used to cool the distillate and condense it into small droplets for easy collection.

[0029] Furthermore, the steam generator 10 includes a heating block 13, a purified water container 14, a gas supply pipe 15, a water inlet pipe 17, and a pressure relief structure. The water inlet pipe 17 is sealed to the water inlet 4, and the other end of the water inlet pipe 17 extends into the purified water container 14. A pipe valve 18 is installed on the water inlet pipe 17. The heating block 13 is installed at the bottom of the purified water container 14. Both the heating block 13 and the pipe valve 18 are electrically connected to the operation panel 3. The gas supply pipe 15 is sealed to the top of the purified water container 14. The heating block 13 contains a resistance wire that can convert electrical energy into heat energy to heat the purified water container 14, causing the purified water inside to boil and generate steam. When generating steam, the pipe valve 18 on the water inlet pipe 17 should be in the closed state.

[0030] Furthermore, the pressure relief structure includes a pressure relief pipe 16 and a pressure balancing tank 8. The top of the purified water container 14 is sealed with the pressure relief pipe 16, and the other end of the pressure relief pipe 16 extends into the pressure balancing tank 8. The pressure balancing tank 8 contains liquid, and the liquid level is higher than the opening of the pressure relief pipe 16. The pressure balancing tank 8 is connected to the atmosphere. When the internal pressure is too high, excess steam will be discharged from the pressure balancing tank 8 along the pressure relief pipe 16, thus relieving pressure. If a negative pressure is generated internally, some liquid in the pressure balancing tank 8 can be drawn into the purified water container 14 through the pressure relief pipe 16, which can prevent the device from affecting the test by drawing samples in due to negative pressure at the alkali distillation device 11.

[0031] Furthermore, the alkaline distillation apparatus 11 includes a reactor 19, a feeding pipe 20, a discharging pipe 21, and a cleaning pipe 22. The top of the reactor 19 is sealed with the feeding pipe 20 and the discharging pipe 21, and a pipe valve 18 is installed on the feeding pipe 20. The bottom of the reactor 19 is sealed with the cleaning pipe 22, and a pipe valve 18 is installed on the cleaning pipe 22. The feeding pipe 20 extends out of the apparatus shell 1 as a feeding port 5, the discharging pipe 21 extends out of the apparatus shell 1 as a discharging port 6, and the cleaning pipe 22 extends out of the apparatus shell 1 as a cleaning port 7. The prepared sample is added into the reactor 19 through the feeding port 5, and sodium hydroxide solution is added simultaneously to facilitate the alkaline distillation reaction.

[0032] Furthermore, the condensation device 12 includes a condensing sleeve 23, two sets of cold liquid circulation pipes 24, a condensate pool 9, and a liquid pump 25. The condensing sleeve 23 is fitted onto the discharge pipe 21, and a condensate pool 9 is provided on one side of the condensing sleeve 23. The condensing sleeve 23 and the condensate pool 9 are sealed together by the two sets of cold liquid circulation pipes 24, with the ends of both sets of cold liquid circulation pipes 24 placed inside the condensate pool 9. A liquid pump 25 is provided at the end of one set of cold liquid circulation pipes 24. The condensate can carry away heat and lower the temperature, causing the distillate to condense. The nitrogen content can be calculated by titration testing after collection.

[0033] Working Principle: When using this device to determine nitrogen content, milk powder is prepared as a sample. The valve 18 on the inlet pipe 17 is opened, and water is added to the purified water container 14 of the steam generator 10 through the water inlet 4. After filling, the valve 18 is closed. The heating block 13 is activated using the operation panel 3. Its internal resistance wire converts electrical energy into heat energy, heating the water in the purified water container 14 until it boils and generates steam. During steam generation, if the internal pressure of the purified water container 14 is too high, the steam will be discharged to the pressure balance tank 8 through the pressure relief pipe 16 to relieve pressure. The generated steam enters the reactor 19 of the alkaline distillation device 11 through the gas delivery pipe 15. At this time, the prepared milk powder sample is added to the reactor 19 through the feeding pipe 20 via the feeding port 5, and an appropriate amount of sodium hydroxide solution is added according to standard requirements, causing the sample to undergo a distillation reaction in an alkaline environment. In the Kjeldahl method, this step decomposes the protein in the sample, converting nitrogen into ammonia. The ammonia-containing vapor generated by the reaction enters the condenser 12 through the discharge pipe 21. In the condenser sleeve 23 of the condenser device 12, the condensate, under the action of the liquid pump 25, continuously circulates from the condensate pool 9 through two sets of cold liquid circulation pipes 24, carrying away the heat of the ammonia vapor, lowering its temperature and causing it to condense into small droplets, which finally flow into the distillate receiving bottle placed at the discharge port 6. After collecting the distillate, it is titrated with a standard acid titration solution of known concentration according to the titration test method specified in the standard. Based on the amount of acid consumed, combined with relevant formulas and conversion factors, the nitrogen content in the distillate can be calculated, and thus the nitrogen content in the milk powder can be obtained. After the testing process is completed, the alkalization distillation device 11 can be cleaned through the feed port 5, and the cleaning solution is discharged from the cleaning port 7.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A distiller for detecting nitrogen content in milk powder, comprising a housing (1), characterized in that: The device housing (1) is provided with an internal structure for the reaction to proceed. The bottom of the device housing (1) is provided with four sets of support feet (2). An operation panel (3) is provided on one side of the device housing (1). A water inlet (4) and a feed pipe inlet (5) are provided on the top of the device housing (1). A discharge pipe inlet (6) is provided on the side of the device housing (1) adjacent to the operation panel (3). A cleaning pipe inlet (7) is provided at the bottom of the device housing (1). An avoidance opening corresponding to the pressure balance tank (8) and the condensate tank (9) is provided on the side of the device housing (1) away from the operation panel (3).

2. The distiller for detecting nitrogen content in milk powder according to claim 1, characterized in that: The internal structure includes a steam generator (10), an alkalization distillation device (11), and a condenser (12). The water inlet (4) is sealed to the steam generator (10), the output end of the steam generator (10) is sealed to the alkalization distillation device (11), and a condenser (12) is provided at the output end of the alkalization distillation device (11). The feed inlet (5) and the discharge inlet (6) are both sealed to the alkalization distillation device (11).

3. The distiller for detecting nitrogen content in milk powder according to claim 2, characterized in that: The steam generator (10) includes a heating block (13), a clean water container (14), a gas supply pipe (15), a water inlet pipe (17), and a pressure relief structure. The water inlet pipe (17) is sealed to the water inlet (4). The other end of the water inlet pipe (17) extends into the clean water container (14). A pipe valve (18) is provided on the water inlet pipe (17). The heating block (13) is provided at the bottom of the clean water container (14). The heating block (13) and the pipe valve (18) are electrically connected to the operation panel (3). The gas supply pipe (15) is sealed to the top of the clean water container (14).

4. The distiller for detecting nitrogen content in milk powder according to claim 3, characterized in that: The pressure relief structure includes a pressure relief pipe (16) and a pressure balancing tank (8). The top of the water purification container (14) is sealed with a pressure relief pipe (16). The other end of the pressure relief pipe (16) extends into the pressure balancing tank (8). The pressure balancing tank (8) contains liquid, and the liquid level is higher than the opening of the pressure relief pipe (16). The pressure balancing tank (8) is connected to the atmosphere.

5. A distiller for detecting nitrogen content in milk powder according to claim 2, characterized in that: The alkalization distillation apparatus (11) includes a reactor (19), a feeding pipe (20), a discharging pipe (21), and a cleaning pipe (22). The top of the reactor (19) is sealed with the feeding pipe (20) and the discharging pipe (21). A pipe valve (18) is provided on the feeding pipe (20). The bottom of the reactor (19) is sealed with the cleaning pipe (22). A pipe valve (18) is provided on the cleaning pipe (22). The feeding pipe (20) extends out of the device housing (1) as a feeding port (5). The discharging pipe (21) extends out of the device housing (1) as a discharging port (6). The cleaning pipe (22) extends out of the device housing (1) as a cleaning port (7).

6. A distiller for detecting nitrogen content in milk powder according to claim 5, characterized in that: The condensation device (12) includes a condensation sleeve (23), two sets of cold liquid circulation pipes (24), a condensate pool (9) and a liquid pump (25). The discharge pipe (21) is fitted with a condensation sleeve (23). A condensate pool (9) is provided on one side of the condensation sleeve (23). The condensation sleeve (23) and the condensate pool (9) are sealed together by two sets of cold liquid circulation pipes (24). The ends of the two sets of cold liquid circulation pipes (24) are placed in the condensate pool (9), and a liquid pump (25) is provided at the end of one set of cold liquid circulation pipes (24).

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