Efficient heat dissipation system suitable for Kjeldahl apparatus

Abstract

The utility model relates to an efficient radiating system suitable for a Kjeldahl apparatus. The efficient radiating system comprises a condenser, a circulating pump, a liquid storage tank and a radiator, the condenser comprises an inner pipe and an outer pipe which are connected in a sleeved mode, the outer pipe is connected with an outlet of the circulating pump through a pipeline, an inlet of the circulating pump is connected with the liquid storage tank through a pipeline, the liquid storage tank is connected with an outlet of the radiator through a pipeline, and an inlet of the radiator is connected with the condenser through a pipeline. And the windward side of the radiator and the shell of the Kjeldahl apparatus form an air inlet chamber. The condenser is formed by the inner pipe and the outer pipe which are connected in a sleeved mode, air serves as a cold source to reduce the temperature of a cooling medium, the cooling medium returns to the condenser after being cooled, the problem that the cooling medium is consumed too much is solved, and the air cooling radiator can guide outside air to flow through other components in the Kjeldahl azotometer through a certain arrangement position design.

Description

Technical Field

[0001] The utility model relates to the technical field of Kjeldahl nitrogen analyzers, in particular to a high-efficiency heat dissipation system suitable for Kjeldahl nitrogen analyzers. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The method of measuring the protein content in a sample based on nitrogen is called the Kjeldahl method. In order to implement this method, the Kjeldahl nitrogen analyzer uses internal components to digest the sample and convert the organic nitrogen in the protein into ammonium salts, and further converts it into ammonia. After distillation and condensation, the ammonia gas is captured and absorbed. The nitrogen content in the sample is calculated by calibrating the ammonia content in the absorption liquid, thereby completing the protein content detection.

[0004] During the operation of the Kjeldahl nitrogen analyzer, a condenser is used to condense the distillation product. A common condenser is a sleeve structure, that is, a condenser tube of a certain shape is used to transport the distillation product, and the outer side of the condenser tube is placed in the sleeve. The cooling medium flowing in the sleeve, such as cooling water, is used to take away the heat in the distillation product, thereby completing the condensation process.

[0005] In this cooling mode, the residence time of the distilled product in the condenser can be adjusted by changing the shape of the condenser, thereby adjusting the heat released from the condenser. For example, in order to obtain a larger heat dissipation area, the prior art adopts a spiral condenser shape. Under this shape, the residence time of the distilled product in the condenser will be extended, so that more heat is released into the cooling medium. However, in this way, the cooling medium has limited ability to absorb heat, and lacks a cheap cold source. Therefore, in this way, it is necessary to continuously transport the cooling medium to the outside of the condenser. When applied to the specific component structure of the Kjeldahl nitrogen analyzer, it is necessary to continuously transport the cooling medium (such as cooling water) from the external pipeline to the outside of the condenser. After absorbing heat, the heated cooling return water cannot be cooled again due to the lack of a cheap cold source, and can only be treated as waste liquid, which will cause waste.

[0006] In addition, in order to ensure that the cooling medium can absorb enough heat, a large sleeve is set outside the cooling tube to accommodate as much cooling medium as possible, thereby alleviating the rapid temperature rise of the cooling medium and reducing the load of waste liquid treatment. In this way, the sleeve outside the condenser is a relatively larger component, which will occupy more space inside the Kjeldahl nitrogen analyzer. The heat generated will affect the operation of other components such as the circuit board and controller inside the Kjeldahl nitrogen analyzer, resulting in a decrease in the life of the Kjeldahl nitrogen analyzer. Utility Model Content

[0007] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides an efficient heat dissipation system suitable for a Kjeldahl nitrogen analyzer, which forms a condenser by using an inner tube and an outer tube connected by a sleeve, eliminates the sleeve in the traditional structure, and reduces space occupancy. The cooling medium in the outer tube is driven by a circulating pump and sent into an air-cooled radiator, and the temperature of the cooling medium is lowered by using air as a cold source, and is returned to the condenser after cooling, thereby solving the problem of excessive consumption of the cooling medium. The air-cooled radiator can also guide the outside air to flow through other components inside the Kjeldahl nitrogen analyzer through a certain layout position design, thereby achieving a certain degree of heat dissipation coverage.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] The first aspect of the utility model provides a high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer, comprising a condenser, a circulation pump, a liquid storage tank and a radiator;

[0010] The condenser comprises a sleeved inner tube and an outer tube, the outer tube is connected to the outlet of a circulation pump through a pipeline, the inlet of the circulation pump is connected to a liquid storage tank through a pipeline, the liquid storage tank is connected to the outlet of a radiator through a pipeline, and the inlet of the radiator is connected to the condenser through a pipeline; the windward surface of the radiator forms an air inlet chamber with the shell of the Kjeldahl nitrogen analyzer.

[0011] Furthermore, the radiator is an air-cooled radiator having a windward surface and an air outlet surface that are arranged relatively to each other. The windward surface and the housing of the Kjeldahl nitrogen analyzer form an air inlet chamber, and the air outlet surface and the housing of the Kjeldahl nitrogen analyzer form an air outlet chamber.

[0012] Furthermore, the height of the liquid inlet of the circulation pump is not higher than the height of the radiator.

[0013] Furthermore, the liquid inlet of the liquid storage tank is located below the liquid level in the liquid storage tank.

[0014] Furthermore, the pipe mouth of the outer tube is connected to the first interface of the three-way joint, the outer tube is communicated with the third interface of the three-way joint, the inner tube passes through the interior of the three-way joint and extends out of the second interface by a set distance, and the outer wall surface of the inner tube is connected to the second interface.

[0015] Furthermore, the combination formed by the inner tube and the outer tube is in a spiral shape.

[0016] Furthermore, the third interface is a medium interface, and the medium interface is arranged opposite to the end cover.

[0017] Furthermore, the first interface and the second interface are arranged opposite to each other, and the diameters of the two interfaces are different.

[0018] Furthermore, an annular gap is formed between the inner tube and the outer tube.

[0019] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0020] 1. The cooling medium flows in the gap between the inner tube and the outer tube. The heated cooling medium releases the absorbed heat into the external ambient air through the radiator, and returns to the condenser to circulate after cooling down, thereby using cheap air as a cold source to reduce the temperature of the cooling medium. While the cooling effect is further improved, the problem of excessive cooling medium consumption is also solved. The entire system only needs a small amount of cooling medium to participate in the circulation, and no additional cooling medium consumption is required.

[0021] 2. The radiator can also guide the outside air to flow through other components inside the Kjeldahl nitrogen analyzer through a certain layout and position design, reducing the impact of the heat generated during the circulation of the cooling medium on the internal components of the Kjeldahl nitrogen analyzer.

[0022] 3. The condenser is formed by the sleeved inner tube and outer tube, and the sleeve on the outside of the condenser in the traditional structure is eliminated, thus reducing the space occupied.

[0023] 4. The inner tube and outer tube of the condenser are connected by sleeves to form a spiral shape, so that the cooling medium transmitted by the outer tube is not easy to produce dead zones, and the flow rate of the cooling medium is accelerated, so that the heat in the distillation product can be quickly taken away, improving the condensation effect of the Kjeldahl nitrogen analyzer.

[0024] 5. The three-way joint connecting the inner tube and the outer tube is formed by processing a section of pipe. It has a simple structure, is easy to obtain materials, and is not prone to leakage. The direction of the medium interface is conducive to the maintenance of the Kjeldahl nitrogen analyzer, so as to drain the cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 It is a schematic diagram of the structure of a high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer provided by the utility model;

[0027] Figure 2 It is a partial structural schematic diagram of a high-efficiency heat dissipation system applicable to a Kjeldahl nitrogen analyzer provided by the utility model;

[0028] Figure 3 It is a structural schematic diagram of a condenser in the form of a combination in the heat dissipation system provided by the utility model;

[0029] Figure 4 It is a structural schematic diagram of the condenser provided by the utility model;

[0030] Figure 5 The utility model is a schematic diagram of the structure of a three-way joint in a condenser.

[0031] Figure 1-Figure 3 Middle: 1 inner pipe, 2 outer pipe, 3 tee joint, 4 connecting pipe, 5 circulation pump, 6 liquid storage tank, 7 second pipe, 8 radiator, 9 first pipe;

[0032] Figure 4-Figure 5 Middle: 31 end cover, 32 medium interface, 33 outer pipe interface, 34 inner pipe interface. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description 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.

[0035] As introduced in the background technology, in the prior art, the condenser in the Kjeldahl nitrogen analyzer consumes too much cooling medium due to the lack of a cheap cold source and the use of a sleeve-structured cooling medium container. After the cooling medium absorbs heat, it is difficult to discharge it in a short time, which will affect other components inside the Kjeldahl nitrogen analyzer.

[0036] Some existing technologies improve the spiral condenser into a sleeve structure, that is, the outer tube and the inner tube are sleeved to form a spiral condenser. The cooling medium is transported by the annular gap between the outer tube and the inner tube. This method makes it difficult for the cooling medium transported by the outer tube to produce a dead zone, and speeds up the flow rate of the cooling medium, so that the heat in the distillation product can be quickly taken away. Although the condensation effect is improved, the amount of cooling medium is reduced, resulting in too fast temperature rise of the cooling medium. Therefore, the traditional sleeve structure is generally retained, that is, the heat of the distillation product passes through the wall of the inner tube and is transferred to the cooling medium in the annular gap between the inner and outer tubes. After the cooling medium is heated, the heat continues to pass through the wall of the outer tube and is absorbed by another part of the cooling medium in the sleeve. This method improves the condensation effect to a certain extent, and will also reduce the temperature rise rate of the cooling medium in the sleeve to a certain extent. However, the improvement effect on the consumption of the cooling medium is not ideal. After the cooling medium in the sleeve is heated to a certain degree, it is still necessary to discharge the heated cooling medium and replenish it with new low-temperature cooling medium. For example, when tap water is used as the cooling medium, it is still necessary to continuously transport tap water as the "new low-temperature cooling medium", and the heated tap water will be discharged into the sewer system, so there will still be waste.

[0037] Therefore, the following embodiment provides an efficient heat dissipation system suitable for a Kjeldahl nitrogen analyzer, in which a condenser is formed by a sleeved inner tube and an outer tube, the sleeve in the traditional structure is eliminated, and the space occupancy is reduced. The cooling medium in the outer tube is driven by a circulating pump and sent into an air-cooled radiator, and the temperature of the cooling medium is reduced by air as a cold source, and the air is returned to the condenser after the temperature is reduced, thereby solving the problem of excessive consumption of the cooling medium. The air-cooled radiator can also guide the outside air to flow through other components inside the Kjeldahl nitrogen analyzer through a certain layout position design, thereby achieving a certain degree of heat dissipation coverage.

[0038] Embodiment 1:

[0039] like Figure 1-Figure 2 As shown, a high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer includes a condenser, the condenser includes an inner tube 1 and an outer tube 2 which are coaxially sleeved to form a spiral shape, the tube mouth of the outer tube 2 is connected to the first interface of the three-way joint 3, and is communicated with the third interface of the three-way joint 3, the tube mouth of the inner tube 1 passes through the interior of the three-way joint 3 and is connected to the second interface, and extends out of the second interface for a set distance;

[0040] The second interface is used to support the inner tube 1 to receive or discharge the distillation product; the third interface is used to support the outer tube 2 to receive or discharge the cooling medium.

[0041] The outer tube 2 is connected to the outlet of the circulation pump 5 through a pipeline using the third interface, the inlet of the circulation pump 5 is connected to the liquid storage tank 6 through a pipeline, the liquid storage tank 6 is connected to the radiator 8 through the second pipeline 7, and the radiator 8 is connected to the third interface of the outer tube 2 through the first pipeline 9; the windward surface of the radiator 8 forms an air inlet chamber with the shell of the Kjeldahl nitrogen analyzer.

[0042] In this embodiment, the radiator 8 is an air-cooled radiator, including a radiator body and a cooling fan connected together. The cooling medium in the outer tube flows through the radiator body, and the heat is transferred to the fin surface of the radiator body. Under the action of the cooling fan, the heat on the fin surface is taken away by the flowing air, so that the temperature of the cooling medium flowing out of the radiator 8 is reduced.

[0043] In this embodiment, the radiator 8 is arranged along the horizontal plane, the lower bottom surface is the windward surface, the upper surface is the windward surface, and the windward surface and the Kjeldahl nitrogen analyzer housing form an air inlet chamber that does not cover the condenser, the circulation pump 5, and the liquid storage tank 6. In this arrangement, the outside air passes through the housing of the Kjeldahl nitrogen analyzer, through the air inlet chamber and reaches the windward surface, passing through the main control board and other electronic components of the Kjeldahl nitrogen analyzer during the process. The flowing air is used to reduce the temperature of the main control board and other electronic components, and the air is used as a cold source to reduce the temperature of the cooling medium, so that the cooling medium forms a cycle and no longer generates losses, thereby improving the problem of excessive consumption of cooling medium in the traditional method.

[0044] In addition to the horizontal arrangement, the radiator 8 can also be arranged in other ways, which is not limited in this embodiment. In actual application, it is determined comprehensively based on the power, heat dissipation area, specific size of the radiator 8 and the arrangement of the internal components of the Kjeldahl nitrogen analyzer. In this embodiment, due to the introduction of the radiator 8, the outside of the condenser no longer needs a separate sleeve to accommodate another group of cooling media, and the radiator 8 is a flat component that can be arranged in the top space of the Kjeldahl nitrogen analyzer, thereby reducing the space occupied by the Kjeldahl nitrogen analyzer in the vertical direction. At the same time, after the condenser and the radiator are matched, air is used as a cold source, and the circulating pump and the liquid storage tank do not need a separate cold source, so that the air inlet chamber of the radiator does not need to cover the condenser, the circulating pump 5 and the liquid storage tank 6.

[0045] When the entire heat dissipation system is in operation, the inner tube 1 of the condenser receives the distillation product, and the annular gap between the inner tube 1 and the outer tube 2 receives the cooling medium, and the heat in the distillation product is transferred to the cooling medium by wall heat transfer.

[0046] The cooling medium passes through the circulation pump, condenser, radiator and liquid storage tank in sequence to form a cycle. Specifically, the cooling medium, driven by the circulation pump 5, enters the condenser to absorb heat. The cooling medium, after absorbing heat and heating up, reaches the radiator 8 through the first pipe 9, and is cooled by the outside air. The cooled cooling medium is sent to the liquid storage tank 6 through the second pipe 7. The cooling medium in the liquid storage tank 6 is driven by the circulation pump 5 to return to the condenser and continue to absorb heat from the distillation product, thereby realizing the cycle.

[0047] The height of the liquid inlet of the circulation pump 5 is lower than the height of the radiator 8, thereby ensuring the normal operation of the coolant circulation.

[0048] The liquid inlet of the liquid storage tank 6 is located below the liquid level in the liquid storage tank 6 to ensure that after the entire device is shut down, the cooling medium in the radiator will not flow back into the liquid storage tank 6, ensuring normal operation when the device is started next time.

[0049] The liquid storage tank 6 is used to accommodate the volume change of the cooling medium after thermal expansion and contraction, and an exhaust port may be added to exhaust the gas in the cooling medium.

[0050] The liquid storage tank 6 is also provided with a liquid injection port and a liquid discharge port for replacing the cooling medium. In this embodiment, the cooling medium circulates in a closed pipe and will deteriorate and deteriorate after a period of time. The cooling medium can be replaced through the liquid injection port and the liquid discharge port on the liquid storage tank 6.

[0051] like Figure 3-Figure 5 As shown, in this embodiment, the first interface is the outer tube interface 33 , the second interface is the inner tube interface 34 , and the third interface is the medium interface 32 .

[0052] In this embodiment, the pipe mouth of the outer tube 2 is connected to the outer tube interface 33 of the tee joint 3, the outer tube 2 is connected to the medium interface 32 of the tee joint 3, the pipe mouth of the inner tube 1 passes through the inside of the tee joint 3 and is connected to the inner tube interface 34, and extends out of the inner tube interface 34 to a set distance.

[0053] The three-way joint 3 comprises an outer pipe interface 33 and an inner pipe interface 34 which are arranged opposite to each other. The diameters of the two interfaces are different. The medium interface 32 is arranged opposite to the end cover 31 .

[0054] The connecting line between the outer tube interface 33 and the inner tube interface 34 is perpendicular to the connecting line formed by the medium interface 32 and the end cover 31 .

[0055] like Figure 5 As shown, the three-way joint 3 in this embodiment is a pipe of a set length. One end of the pipe is closed by an end cap 31, and two holes of different diameters are opened on both sides of the pipe as interfaces for connecting the outer pipe and the inner pipe respectively, thereby forming a three-way joint 3. This structure is simple to process and easy to obtain materials.

[0056] The inner tube 1 and the outer tube 2 form a spiral shape, and the inner tube 1 extends out of the tube mouth of the outer tube 2 for a distance. During assembly, since the inner tube 1 is longer, after the three-way joint 3 is inserted into the inner tube 1, one of the interfaces (the outer tube interface 33) is first connected to the wall of the outer tube 2, and welding is preferably used to avoid leakage. Then the other interface (the inner tube interface 34) is connected to the wall of the inner tube 1, and welding is also preferably used to avoid leakage. The medium interface 32 faces downward to facilitate the drainage of the liquid in the outer tube 2 during condenser maintenance.

[0057] The inner tube 1 is used to transport heat medium. The heat medium in this embodiment is the distillation product in the nitrogen determination process.

[0058] The outer tube 2 is used to transmit a cooling medium. The cooling medium in this embodiment is water, which is used to reduce the heat in the distillation product so that the ammonia gas therein is condensed and absorbed by the absorption liquid.

[0059] The media in the inner tube 1 and the outer tube 2 flow in opposite directions, forming a countercurrent heat exchange form.

[0060] The inner tube 1 and the outer tube 2 may be made of different materials to meet different working conditions. For example, the inner tube 1 may be made of 316L stainless steel, titanium alloy, etc.; the outer tube 2 may be made of 304 stainless steel, etc.

[0061] According to different working conditions, the inner tube 1 can be made of seamless tubes of φ6, φ6.35, and φ8, so that the outer surface area of ​​the inner tube 1 is adapted to the heat dissipation power. 2 The heat exchange capacity corresponding to the surface area is between 5 and 60kW.

[0062] The annular gap formed between the inner tube 1 and the outer tube 2 is 0.5 to 3 mm.

[0063] Through the above structure, the sleeve connection between the inner tube 1 and the outer tube 2 makes it difficult for dead zones to be generated inside the outer tube 2, and accelerates the flow rate of the cooling medium, so that the heat in the heat medium can be quickly taken away, thereby improving the condensation effect.

[0064] The inner tube 1 and the outer tube 2 form a combination, and the number of the combination is not limited, for example Figure 3 In the embodiment, there are two groups of inner tubes 1 and outer tubes 2 formed by a combination, and the outer tubes 2 of the two groups of the combination are connected by a connecting pipe 4 for a common cooling medium, while the inner tubes 1 are not connected, so that the heat medium in the inner tubes 1 is cooled by the cooling medium in the outer tubes 2 in parallel, thereby obtaining a higher cooling efficiency. In this structure, the orientation of each pipe opening can be arranged according to actual needs.

[0065] A pagoda-shaped structure may also be provided on the medium interface 32 of the three-way joint 3 for connecting with a radiator and a circulation pump.

[0066] The above structure is applied in the Kjeldahl nitrogen analyzer. The Kjeldahl nitrogen determination method is a method for measuring the protein content in a sample based on nitrogen element, that is, using concentrated sulfuric acid to digest the sample, converting all organic nitrogen in the sample into inorganic ammonium salts, and then converting the ammonium salts into ammonia under alkaline conditions. The ammonia is distilled out with water vapor and absorbed by excess boric acid solution, and then titrated with standard hydrochloric acid. The amount of nitrogen in the sample can be calculated based on the consumed standard hydrochloric acid.

[0067] In the Kjeldahl nitrogen analyzer, the sample is dissolved in concentrated sulfuric acid in advance to obtain a test solution, so that all the proteins are converted into ammonia. Steam is passed into the digestive tract to boil the test solution, so that the ammonia in the test solution is distilled out in the form of ammonia gas, and then sent to the condenser in this embodiment for condensation. The condensed ammonia is absorbed by the boric acid solution.

[0068] 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. An efficient heat dissipation system suitable for a Kjeldahl nitrogen analyzer, characterized in that: Includes condenser, circulation pump, liquid storage tank and radiator; The condenser comprises a sleeved inner tube and an outer tube, the outer tube is connected to the outlet of a circulation pump through a pipeline, the inlet of the circulation pump is connected to a liquid storage tank through a pipeline, the liquid storage tank is connected to the outlet of a radiator through a pipeline, and the inlet of the radiator is connected to the condenser through a pipeline; the windward surface of the radiator forms an air inlet chamber with the shell of the Kjeldahl nitrogen analyzer.

2. A high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer as claimed in claim 1, characterized in that: The radiator is an air-cooled radiator having a relatively arranged windward surface and a windward surface. The windward surface and the shell of the Kjeldahl nitrogen analyzer form an air inlet chamber, and the windward surface and the shell of the Kjeldahl nitrogen analyzer form an air outlet chamber.

3. The high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer according to claim 1, characterized in that: The pipe mouth of the outer tube is connected to the first interface of the three-way joint, the outer tube is communicated with the third interface of the three-way joint, the inner tube passes through the inside of the three-way joint and extends out of the second interface for a set distance, and the outer wall surface of the inner tube is connected to the second interface.

4. The high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer according to claim 1, characterized in that: The height of the liquid inlet of the circulation pump is not higher than the height of the radiator.

5. The high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer according to claim 1, characterized in that: The liquid inlet of the liquid storage tank is located below the liquid level in the liquid storage tank.

6. The high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer according to claim 1, characterized in that: The combination formed by the inner tube and the outer tube is in a spiral shape.

7. The high-efficiency heat dissipation system for a Kjeldahl nitrogen analyzer as claimed in claim 3, characterized in that: The first interface and the second interface are arranged opposite to each other, and the diameters of the two interfaces are different.

8. The high-efficiency heat dissipation system suitable for a Kjeldahl nitrogen analyzer as claimed in claim 3, characterized in that: The third interface is a medium interface, and the medium interface is arranged opposite to the end cover.

9. The high-efficiency heat dissipation system for a Kjeldahl nitrogen analyzer according to claim 1, characterized in that: The medium in the inner tube and the medium in the outer tube flow in opposite directions.

10. The high-efficiency heat dissipation system for a Kjeldahl nitrogen analyzer according to claim 1, characterized in that: An annular gap is formed between the inner tube and the outer tube.

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