Heating module and flash evaporator

Abstract

The utility model relates to the field of analysis equipment, in particular to a heating module and a flash evaporator. The heating module comprises a heating block, a flash evaporation pipe and a metal filling part. The heating block is provided with a groove, the flash evaporation pipe is arranged in the groove, and the metal filling part is arranged in the groove and fills a gap between the heating block and the flash evaporation pipe. According to the heating module provided by the utility model, heat generated by the heating block can be quickly and uniformly conducted to the flash evaporation pipe, so that fluid in the flash evaporation pipe is uniformly and quickly heated.

Description

Technical Field

[0001] The utility model relates to the field of analytical equipment, in particular to a heating module and a flash evaporator. Background Art

[0002] The flash evaporator's heating module operates on the principle of flash evaporation, which utilizes instantaneous high temperature and pressure to rapidly evaporate water or other liquids into vapor. Due to its rapid heating capabilities and high-pressure technology, the heating module is widely used in the energy and chemical, pharmaceutical, food, and environmental processes sectors, particularly for sample pretreatment in gas chromatography.

[0003] In the heating module, the heating block is used to rapidly heat up the liquid in the flash tube to evaporate and form steam. However, due to poor heat transfer between the heating block and the flash tube, the liquid in the flash tube is difficult to be heated evenly, which in turn affects the analysis results. Summary of the Invention

[0004] In view of the above problems, the present invention provides a heating module, which allows heat to be quickly and evenly conducted to the flash tube, so that the fluid inside the flash tube is evenly and quickly heated.

[0005] The utility model provides a heating module comprising a heating block, a flash evaporation tube, and a metal filling portion. The heating block has a groove, the flash evaporation tube is disposed within the groove, and the metal filling portion is disposed within the groove to fill the gap between the heating block and the flash evaporation tube. The flash evaporation tube and the heating block form a fully metal integrated structure, enabling faster heat transfer and more precise temperature control.

[0006] Optionally, the metal filling portion is formed by filling liquid metal into the tank and solidifying it. The liquid metal can densely fill the gap between the heater and the flash tube, making heat transfer more efficient and rapid.

[0007] Optionally, the liquid metal is tin, zinc or aluminum.

[0008] Optionally, the groove is an annular groove comprising an inner annular wall portion and an outer annular wall portion spaced apart from each other, and the flash tube is wound around and attached to the outer annular wall portion. Typically, an inert layer is applied to the inner wall of the flash tube to prevent corrosion damage to the tube by the liquid within the tube and to prevent adsorption of the sample on the inner wall of the tube. By winding the flash tube around and attaching it to the outer annular wall portion, the curvature radius of the flash tube can be increased, thereby protecting the inert layer on the inner wall of the flash tube.

[0009] Optionally, the groove extends in a vertical direction, with the groove opening located at the top of the groove. Even if the metal filled in the groove is liquefied at high temperature, it will not affect the continued heat conduction, which can break through the limitation of the metal melting point and achieve a higher flash evaporation temperature.

[0010] Optionally, a cover plate covers the notch of the slot and is fixedly connected to the heating block. The cover plate can prevent the external insulation material from contacting the metal filling portion, and even if the metal liquefies, it will not overflow and contact the insulation material.

[0011] Optionally, the heating block includes a metal block, a heating rod receiving groove provided at an end of the metal block, and a heating rod matched and embedded in the heating rod receiving groove. With this arrangement, the flash evaporation module structure is more compact and heat transfer is faster.

[0012] Optionally, the heating block further comprises a temperature sensor, which is arranged at the end of the metal block. The temperature sensor is arranged at this position, which can more accurately and sensitively reflect the real-time temperature of the flash tube.

[0013] Optionally, the outer wall of the heating rod and the outer wall of the temperature sensor are both wrapped with metal foil. The metal foil can maintain stable heat transfer between the components even when there is a certain system tolerance or assembly tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a heating module provided in an embodiment of the present utility model.

[0015] Figure 2 It is a structural schematic diagram of the heating module obtained after the cover plate of the heating module provided in an embodiment of the present invention is removed.

[0016] Figure 3 It is a schematic diagram of the assembly structure of the heating block and the flash tube according to the embodiment of the present utility model.

[0017] Figure markings: 100-heating module, 1-heating block, 1a-metal block, 2-annular groove, 2a-outer annular wall, 2b-inner annular wall, 3-flash tube, 4-metal filling part, 5-U-shaped groove, 5a-heating rod accommodating groove, 5b-temperature sensor accommodating groove, 6-heating rod, 7-temperature sensor, 8-aluminum foil, 9-cover plate, 10-screw, 11-screw hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Figure 1 Schematic diagram of the structure of the heating module 100 provided in this embodiment. Figure 21 is a schematic structural diagram of the heating module 100 obtained after the cover plate 9 of the heating module 100 in this embodiment is removed. Figure 3 It is a schematic diagram of the assembly structure of the heating block 1 and the flash tube 3.

[0020] refer to Figure 3 In this embodiment, the heating module 100 includes a heating block 1 and a flash tube 3. An annular groove 2 is opened in the center of the heating block 1. The annular groove 2 is a groove for accommodating the flash tube 3. Specifically, the flash tube 3 is wound in the annular groove 2.

[0021] refer to Figure 2 In the annular groove 2, the gap between the heating block 1 and the flash tube 3 is filled with solidified metal to form a metal filling portion 4. After the heating block 1 is heated, the heat is transferred to the flash tube 3 through the metal filling portion 4, heating and vaporizing the liquid in the flash tube 3.

[0022] In this embodiment, because the space between the flash tube 3 and the heating block 1 is tightly filled with the metal filling portion 4, heat transfer is more uniform and rapid, and temperature control is more precise.

[0023] In this embodiment, the material of the metal filling part 4 is selected from a metal type with a low melting point and a small volume change during the liquid-solid phase transition, preferably tin. When the metal is in a liquid state, it is filled into the annular groove 2 on which the flash tube 3 is already wound. The liquid metal can flow freely, so that it can flow into the gap between the heating block 1 and the flash tube 3 and fill the gap. Afterwards, as the temperature decreases, the liquid metal will solidify into the metal filling part 4 in the annular groove 2. By making the metal filling part 4 in the above manner, the metal filling part 4 can maintain close contact with the flash tube 3 and the heating block 1 in the liquid metal state after solidification, thereby contacting the flash tube 3 and the heating block 1 with a larger area, thereby improving the heat transfer performance between the flash tube 3 and the heating block 1, especially the stability of temperature transfer.

[0024] In some embodiments, the metal may be a metal with a lower melting point, and the heating block 1 may be heated to a temperature above the melting point of the metal to melt the metal. To ensure that the metal forming the metal filling portion 4 does not flow out even if it melts during the heating process, the opening direction of the annular groove 2 is vertically upward. In this way, even if the metal of the metal filling portion 4 melts, it will be carried in the annular groove 2 and will not easily leak out. Further, referring to Figure 1In this embodiment, the heating module 100 further includes a cover plate 9, which covers the notch of the annular groove 2 and is fixedly connected to the heating block 1. The cover plate 9, which is fixedly connected to the heating block 1, can not only prevent the external insulation material of the heating module 100 from contacting the metal filling part 4, but also prevent the metal filling part 4 in the annular groove 2 from overflowing even if vibration occurs after being heated and melted. In this embodiment, the cover plate 9 and the heating block 1 are connected by threads. Specifically, four screw holes 11 of the same diameter are evenly distributed along the circumferential direction on the outer periphery of the annular groove 2. The cover plate 9 is threadedly connected to the heating block 1 using these four screw holes 11.

[0025] In this embodiment, reference Figure 3 The annular groove 2 is specifically annular and includes an outer annular wall portion 2a and an inner annular wall portion 2b that are spaced apart. The flash tube 3 is wound in the annular groove 2. Specifically, the flash tube 3 can be attached to the outer annular wall portion 2a for winding, that is, the curvature radius of the winding is substantially equal to the radius of the outer annular wall portion 2a, so as to obtain a larger winding length and heat transfer contact area, and reduce the deformation of the inert layer of the flash tube 3. Alternatively, the flash tube 3 can be attached to the inner annular wall portion 2b for winding, that is, the curvature radius of the winding is substantially equal to the radius of the inner annular wall portion 2b. In addition, the flash tube 3 can also be attached to the bottom of the annular groove 2 for winding, or wound between the outer annular wall portion 2a and the inner annular wall portion 2b with a curvature radius that is greater than the radius of the inner annular wall portion 2b and smaller than the radius of the outer annular wall portion 2a. This is not limited in the embodiments of the present invention.

[0026] Typically, the inner wall of the flash tube 3 is coated with an inert layer (not shown). This layer prevents corrosion damage to the inner wall of the flash tube 3 caused by the liquid within the flash tube 3 and prevents adsorption of the sample onto the inner wall. Preferably, to prevent deformation and damage to the inert layer caused by the flash tube 3 during winding, in this embodiment, the flash tube 3 is disposed in the annular groove 2 by being wound and attached to the outer annular wall portion 2a. This significantly increases the curvature radius of the flash tube 3 during winding, reducing the possibility of deformation and damage to the inert layer of the flash tube 3 due to excessive winding.

[0027] In addition, the outer annular wall portion 2a can provide a larger winding space for the flash tube 3, so that the flash tube 3 can be selected in more lengths according to actual usage requirements. Moreover, the outer annular wall portion 2a can provide a larger direct contact area for the flash tube 3, thereby improving the heat transfer effect between the two.

[0028] Continue to refer Figure 2The heating block 1 includes a metal block 1a, a heating rod accommodating groove 5a, a heating rod 6, a temperature sensor accommodating groove 5b and a temperature sensor 7. The heating rod accommodating groove 5a and the temperature sensor accommodating groove 5b are both located at the ends of the same side of the heating block 1. The heating rod accommodating groove 5a and the temperature sensor accommodating groove 5b are both U-shaped grooves 5, which penetrate the heating block 1 along the length direction. The opening of the heating rod accommodating groove 5a is specifically set on the side of the heating block 1, and the opening of the temperature sensor accommodating groove 5b is specifically set on the top surface of the heating block 1. The heating rod 6 is set in the heating rod accommodating groove 5a, and the temperature sensor 7 is set in the temperature sensor accommodating groove 5b. In particular, the temperature sensor 7 is set in the center of the temperature sensor accommodating groove 5b along the length direction of the temperature sensor accommodating groove 5b to reduce the distance between the temperature sensor accommodating groove 5b and the flash tube 3, thereby improving the accuracy of temperature detection.

[0029] The heating rod 6 and the temperature sensor 7 are both cylindrical. To match this, the bottom of the U-shaped groove 5 is arc-shaped, and the groove opening is a straight groove opening that can have a certain degree of shrinkage to improve the installation stability and convenience of the heating rod 6 and the temperature sensor 7.

[0030] The metal foil 8 is wrapped around the outer wall surface of the heating rod 6 and the temperature sensor 7. The metal foil 8 fits tightly to the heating rod 6 and the temperature sensor 7 respectively. The thickness of the metal foil 8 wrapped around different areas of the heating rod 6 is kept as consistent as possible. The outer diameters of the cylindrical portions of the wrapped heating rod 6 and the temperature sensor 7 are basically consistent with the inner diameters of the heating rod receiving groove 5a and the temperature sensor receiving groove 5b respectively. Moreover, because the metal foil 8 has a certain degree of ductility, the heating rod 6 and the temperature sensor 7 can be fixed relatively tightly in the heating rod receiving groove 5a and the temperature sensor receiving groove 5b respectively. In the presence of certain system tolerances or assembly tolerances, the metal foil 8 can still maintain stable heat transfer between the various components. This method of slotting and fixing the heating rod 6 and the temperature sensor 7 can make the heating module 100 more compact, the heat transfer more rapid, and the temperature sensor can more accurately and sensitively reflect the real-time temperature of the flash tube 3.

[0031] In this embodiment, the cover plate 9 not only covers the top of the annular groove 2, but also covers the side opening of the U-shaped groove 5. The cover plate 9 has a top plate and a side plate that are bent into one piece. The size of the top plate is consistent with the size of the top surface of the heating block 1, and is arranged in a manner that the edges overlap with the top surface of the heating block 1. The top plate can completely cover the top opening of the annular groove 2 and the top opening of the temperature sensor accommodating groove 5b. The size of the side plate is consistent with the side size of the heating block 1, and is arranged in a manner that the edges overlap with the sides of the heating block 1. The side plate can completely cover the side opening of the heating rod accommodating groove 5a. In the above manner, the cover plate 9 can also limit the position of the heating rod 6 and the temperature sensor 7 to prevent the heating rod 6 and the temperature sensor 7 from falling out from the side of the heating block 1.

[0032] The heating module 100 provided in this embodiment can be used in a flash evaporator, which can be connected to a gas chromatograph as a sample pretreatment device for the gas chromatograph, rapidly evaporating a liquid sample into a gaseous state and measuring the content of different components in the sample. Due to its improved heat transfer performance, the heating module 100 provided in this embodiment can rapidly evaporate different components in the sample into a gaseous state within a substantially similar, short period of time, thereby improving the accuracy of component content detection.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heating module, characterized in that: include: a heating block having a slot; a flash tube, disposed in the tank; The metal filling part is arranged in the groove and fills the gap between the heating block and the flash tube.

2. The heating module according to claim 1, wherein The metal filling portion is formed by filling liquid metal into the groove and solidifying it.

3. The heating module according to claim 2, wherein The liquid metal is tin, zinc or aluminum.

4. The heating module according to claim 2, wherein: The groove is an annular groove, and the annular groove includes an inner annular wall portion and an outer annular wall portion that are spaced apart. The flash tube is wound around and attached to the outer annular wall portion.

5. The heating module according to claim 2, wherein: The groove extends in a vertical direction, and the groove opening is located at the top of the groove.

6. The heating module according to claim 5, characterized in that Also includes: A cover plate covers the notch of the slot and is fixedly connected to the heating block.

7. The heating module according to claim 1, wherein The heating block comprises: Metal blocks; a heating rod receiving groove, provided at the end of the metal block; The heating rod is matched and embedded in the heating rod receiving groove.

8. The heating module according to claim 7, wherein: The heating block further comprises: A temperature sensor is arranged at the end of the metal block.

9. The heating module according to claim 8, wherein The outer wall of the heating rod and the outer wall of the temperature sensor are both wrapped with metal foil.

10. A flash evaporator, characterized in that: The invention comprises a heating module according to any one of claims 1 to 9.

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