Device for heating lithium liquid in pipeline

Abstract

The embodiment of the present application provides a device for heating lithium liquid in a pipeline, wherein the lithium liquid flows in the pipeline, and the device comprises: an induction coil arranged on the pipeline, the induction coil is powered to heat the surface of the pipeline; a temperature measuring part for measuring the temperature of the lithium liquid in the pipeline; a connecting part for connecting the pipeline carrying the induction coil and the temperature measuring part, and the connecting part is arranged to enable the pipeline carrying the induction coil to communicate with the pipeline not carrying the induction coil in the lithium liquid, wherein the temperature measuring part is sealingly connected with the connecting part. The device provided by the embodiment of the present application can heat the lithium liquid in the pipeline when the pipeline is in the running state, and when the device provided by the embodiment of the present application is installed on the pipeline to heat the lithium liquid, the pipeline has good sealing state.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of direct use of electric energy, and in particular to a device for heating lithium liquid in a pipeline. BACKGROUND

[0002] In some technologies, high-temperature liquid lithium is needed, and the existing devices are heated outside the pipeline containing the liquid lithium or are heated by setting the heating device in the liquid lithium.

[0003] The above heating methods have low heating efficiency and may cause leakage of the lithium liquid during the heating process. SUMMARY

[0004] Therefore, in order to solve at least one aspect of the above problems, embodiments of the present application provide a device for heating lithium liquid in a pipeline, wherein the lithium liquid flows in the pipeline, and the device comprises: an induction coil, the induction coil is arranged on the pipeline, and the induction coil heats the surface of the pipeline after being powered on; a temperature measuring part, the temperature measuring part measures the temperature of the lithium liquid in the pipeline; a connecting part, the connecting part is arranged to connect the pipeline carrying the induction coil and the temperature measuring part, and the connecting part is arranged to enable the pipeline carrying the induction coil and the pipeline not carrying the induction coil to communicate with the lithium liquid, wherein the temperature measuring part is sealingly connected to the connecting part.

[0005] The device provided by the embodiments of the present application can heat the lithium liquid in the pipeline when the pipeline is in a running state, and the device provided by the embodiments of the present application is installed on the pipeline to heat the lithium liquid, and the pipeline has good sealing state. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a schematic diagram of the principle of the device provided by the embodiments of the present application;

[0007] Figure 2 is a structural schematic diagram of the device provided by the embodiments of the present application.

[0008] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the understanding of the reader. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are one embodiment of the present application, rather than all embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0010] It should be noted that the technical terms or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art to which the present application belongs, unless otherwise defined. If the description of "first", "second", etc. is involved throughout the text, the "first", "second", etc. is only used to distinguish similar objects, and cannot be understood as indicating or implying the relative importance, the order of precedence or implicitly indicating the number of the indicated technical features. It should be understood that the data of "first", "second", etc. can be interchanged under appropriate circumstances. If "and / or" appears throughout the text, it means that three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, in order to facilitate the description, spatial relative terms such as "above", "below", "top", "bottom" and the like can be used herein, which are only used to describe the spatial positional relationship of one device or feature with other devices or features as shown in the figure. It should be understood to include different orientations in use or operation other than the orientation shown in the figure.

[0011] Liquid lithium has the characteristics of high boiling point, small viscosity, good thermal conductivity and low vapor pressure, and has good application prospect in high temperature lithium cooled fast reactor.

[0012] However, it is difficult to heat the flowing liquid lithium, and the existing technology has the following conventional heating methods: indirect heating of the outer wall of the liquid lithium pipeline by using heating elements; immersing the heating elements into the liquid lithium to heat the liquid lithium. The disadvantages of the above heating methods are that the former has large contact thermal resistance, resulting in low effective heat power, and the latter mainly has the problem of compatibility material processing technology of the heating element. In addition, there are some test methods for heating liquid lithium, which do not place liquid lithium in the pipeline, but place liquid lithium in an open container. Such method is quite different from the actual liquid lithium in the reactor operation condition, and the test result has poor applicability.

[0013] As shown in Figure 1 , the device provided by the embodiment of the present application can heat the liquid lithium flowing in the pipeline 100, which comprises an induction coil 20 arranged on the pipeline 100, and the induction coil 20 heats the surface of the pipeline 100 after being powered on. As shown in Figure 1 , the induction coil 20 is connected to a power supply module 200, the power supply module 200 controls the frequency current outputted thereby, the induction coil 20 generates eddy current, rapidly heats the surface of the pipeline 100 under the action of Joule heat, so as to rapidly heat the liquid lithium in the pipeline 100 to a predetermined temperature.

[0014] The device provided by the application can realize higher heating heat flow density and has better heating effect than the heating mode in the prior art. The inductive heating zone only needs a straight pipe section of not more than 300 mm to realize large-power heating of dozens of kilowatts. The device can realize heating of lithium liquid at a higher temperature, and the wall surface temperature of the heated pipe can reach the vicinity of the melting point of the pipe material.

[0015] Further, the structure of the device provided by the embodiment of the application is described in detail in combination with Figure 2

[0016] The device comprises: an inductive coil 20 arranged on a pipe 101; a temperature measuring part 30 for measuring the temperature of lithium liquid in the pipe 101; and a connecting part 40 arranged to connect the pipe 101 carrying the inductive coil 20 and the temperature measuring part 30, and arranged to enable the pipe 101 carrying the inductive coil 20 to communicate with a pipe (not shown) not carrying the inductive coil 20 in terms of lithium liquid, and to seal the temperature measuring part 30 and the connecting part 40.

[0017] The distance between the inductive coil 20 and the pipe 101 can be arranged to be as small as possible, so as to improve the inductive intensity.

[0018] In the preferred embodiment of the application, the connecting part 40 has the function of a tee joint, one end of which is connected with the pipe 101 carrying the inductive coil 20, and the other end of which is connected with a pipe not carrying the inductive coil 20, so that the lithium liquid in the pipe 101 flows into the other pipe through the connecting part 40 after being heated. The third end of the connecting part 40 is sealed with the temperature measuring part 40, and the temperature measuring part 40 corresponds to the end of the pipe 101 closed.

[0019] Since the temperature measuring part 30 is sealed with the connecting part 40, the device of the embodiment of the application can avoid leakage of the lithium liquid, thereby effectively improving the safety of the whole liquid lithium operation loop including the pipe.

[0020] The temperature measuring part 30 can be used to accurately know the temperature of the liquid lithium while the liquid lithium is being heated, so that the control parameters of the inductive coil can be adjusted in real time to meet different heating requirements.

[0021] In some embodiments, the connecting part 40 can be made of the same material as the pipe 101, for example, refractory metal.

[0022] In the preferred embodiment of the application, as Figure 2 ​As shown, the connecting part 40 comprises a first end 41 and a second end 42, the first end 41 is fixedly connected with the pipe 101 carrying the induction coil 20; the second end 42 is sealingly connected with the temperature measuring part 30. The fixed connection here can be in the form of welding or other fixed connection forms.

[0023] In the preferred embodiment of the present application, as shown in Figure 2 As shown, the temperature measuring part 30 comprises a shell 31 and a thermocouple 32, the thermocouple 32 is arranged in the shell 31; the shell 31 is arranged as a spherical surface at the joint with the second end 42, and the second end 42 is arranged as an inclined surface at the joint with the shell 31, and the two are sealingly connected. Due to the above structure, it has good sealing effect.

[0024] In the preferred embodiment of the present application, as shown in Figure 2 As shown, the device further comprises a fastener 50; the shell 31 is provided with a stop structure 311, and the connecting part 40 is provided with a mating part 43 of the fastener 50; when the fastener 50 cooperates with the mating part 43, under the action of the stop structure 311, the fastener 50 drives the shell 31, so that the temperature measuring part 30 abuts against the connecting part 40. The shell 31 comprises a first end 312 and a second end 313, the first end 312 is thinner than the second end 313, the radial dimension of the second end 313 is comparable to the radial dimension of the pipe 101, a longer part of the thermocouple 32 extends at the first end 312 of the shell 31, and the first end 312 is located at the radial middle of the lithium liquid in the pipe 101. Through the above structure, the sealing between the temperature measuring part 30 and the connecting part can be improved, so that the leakage of lithium liquid can be effectively avoided.

[0025] The fastener 50 and the shell 31 can be made of temperature-resistant stainless steel, which can be disassembled and replaced. In some embodiments, the fastener 50 can be a fastening nut, the fastening nut cooperates with the mating part 43, and the mating part 43 can be provided with threads, so that it is threadedly connected with the fastening nut.

[0026] In the preferred embodiment of the present application, as shown in Figure 2 As shown, the device further comprises a fixing member 33, which is arranged to fix the thermocouple 32 to the shell 31.

[0027] In the preferred embodiment of the present application, a positioning member 33 is further included, which is fixedly arranged in the pipe 101 and arranged to position the temperature measuring part 30. Specifically, the positioning member 33 can position the thermocouple 32.

[0028] In order to grasp the temperature of the pipe, a thermocouple can also be arranged outside the pipe, as shown in Figure 2As shown, it shows that the tube outside thermocouple 60 is arranged outside the pipe 101 to measure the temperature of the pipe, and the parameters of the induction coil are adjusted according to the detected temperature of the pipe, so as to avoid the problem of the pipe caused by high temperature. For example, if the pipe temperature is higher than the safe temperature that the pipe can bear, the operation of the induction coil can be stopped.

[0029] In the preferred embodiment of the present application, the induction coil 20 can be a tubular coil, and the tubular coil contains a cooling medium, which flows into one end of the tubular coil and flows out from the other end of the tubular coil, so as to cool the induction coil 20. The temperature of the induction coil 20 is adjusted by controlling the flow rate of the cooling medium, and preferably, the temperature of the induction coil is controlled at about 50℃ to ensure the stability and safety of the coil operation.

[0030] In the preferred embodiment of the present application, the heat preservation structure can also be provided, Figure 1 As shown schematically, the heat preservation structure 70 is arranged to cover the pipe 100, and the induction coil 20 is arranged in the heat preservation structure 70. The heat preservation structure can be high-temperature insulating material, high-temperature ceramic, etc., which can avoid the loss of the temperature of the heating in the pipe, and also can prevent the high-frequency discharge or touch short circuit between the induction coil 20 and the pipe 100.

[0031] The device provided by the embodiment of the present application is arranged in the vacuum chamber during use, and the vacuum degree in the vacuum chamber is controlled at 10 -3 Pa order to prevent the oxidation of the components of the device at high temperature.

[0032] It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments without conflict.

[0033] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A device for heating lithium liquid in a pipe in which the lithium liquid flows, wherein, The device comprises: An induction coil arranged on the pipe, which heats the surface of the pipe when energized; A temperature measuring unit for measuring the temperature of the lithium liquid in the pipe; A connecting unit arranged to connect the pipe carrying the induction coil and the temperature measuring unit, and arranged to enable the pipe carrying the induction coil to communicate with the pipe not carrying the induction coil in terms of lithium liquid, Wherein, the temperature measuring unit and the connecting unit are sealingly connected; The temperature measuring unit comprises a shell and a thermocouple arranged in the shell; The shell and the second end of the connecting unit are arranged to be spherical and inclined, respectively, and are sealingly connected.

2. The device of claim 1, wherein, The connecting unit comprises a first end and a second end, the first end is fixedly connected with the pipe carrying the induction coil; The second end is sealingly connected with the temperature measuring unit.

3. The device of claim 1, wherein, Further comprising a fastener; The shell is provided with a stop structure, and the connecting unit is provided with a fitting part of the fastener; When the fastener is fitted with the fitting part, the fastener drives the shell under the action of the stop structure, so that the temperature measuring unit abuts against the connecting unit.

4. The device of claim 1, wherein, The shell comprises a first end and a second end, the first end is thinner than the second end, the radial dimension of the second end is comparable to the radial dimension of the pipe, and the longer part of the thermocouple extends at the first end of the shell, And the first end is located in the radial middle of the lithium liquid in the pipe.

5. The device of claim 1, wherein, A fixing member is arranged to fix the thermocouple to the shell.

6. The apparatus of claim 1, wherein, Further comprising A positioning member fixedly arranged in the pipe, which is arranged to position the temperature measuring unit.

7. The apparatus of claim 1, wherein, Further comprising An external thermocouple arranged outside the pipe to measure the temperature of the pipe.

8. The device of claim 1, wherein, The induction coil is a tubular coil, which contains a cooling medium.

9. The device of claim 1, wherein, Further comprising a heat preservation structure arranged to cover the pipe, and the induction coil is arranged in the heat preservation structure.

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