Thermal stratification mitigation device and temperature regulation method

Abstract

The present invention provides a thermal stratification mitigation device and a temperature regulation method, which relate to the technical field of liquid temperature regulation. The thermal stratification mitigation device includes a liquid holding pool, an air supply component, a first heating component and a temperature measuring component, wherein the liquid holding pool is used to hold liquid; the air supply component includes an air supply pipe, and the air outlet end of the air supply pipe extends into the lower area of ​​the liquid holding pool; the first heating component is provided in the liquid holding pool, and the number is at least two and arranged in the up and down direction, and is used to heat the liquid in the corresponding height area in the liquid holding pool; the temperature measuring component is provided in the liquid holding pool, and the temperature measuring component includes at least two liquid thermometers arranged at intervals in the up and down direction, and the liquid thermometer is used to detect the liquid temperature in the corresponding height area in the liquid holding pool. The temperature regulation method is applied to the above-mentioned thermal stratification mitigation device. The thermal stratification mitigation device can quickly and effectively alleviate the thermal stratification phenomenon of the liquid, thereby reducing damage to the liquid holding pool and extending its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid temperature regulation, and in particular to a thermal stratification mitigation device and a temperature regulation method. Background Art

[0002] During the melting process of low-melting-point alloys, such as lead-based and bismuth-based alloys, convection and density variations can lead to significant differences in metal temperature at different heights. This phenomenon is known as thermal stratification. This can cause localized thermal stress differences in the liquid pool, increasing thermal fatigue and potentially damaging the pool. Summary of the Invention

[0003] The purpose of the present invention includes providing a thermal stratification mitigation device and a temperature regulation method to solve the technical problem that the thermal stratification phenomenon of liquid in the existing liquid holding pool will cause differences in local thermal stress in the liquid holding pool, resulting in increased thermal fatigue and thus causing damage to the liquid holding pool.

[0004] In order to solve the above problems, the present invention provides a thermal stratification mitigation device, comprising:

[0005] A liquid holding tank, used for holding liquid;

[0006] An air supply assembly, comprising an air supply pipe, wherein the air outlet end of the air supply pipe extends into the lower area of ​​the liquid holding tank;

[0007] First heating components, provided in the liquid holding pool, with at least two components arranged in the vertical direction, for heating the liquid in the corresponding height area of ​​the liquid holding pool; and

[0008] A temperature measuring component is provided in the liquid containing pool, and the temperature measuring component includes at least two liquid thermometers spaced apart in the vertical direction, and the liquid thermometers are used to detect the liquid temperature of the corresponding height area in the liquid containing pool.

[0009] Optionally, the gas supply pipe is provided with a second heating component, an inlet thermometer and an outlet thermometer, wherein the second heating component is used to heat the gas flowing through the corresponding area, the inlet thermometer is used to detect the inlet temperature of the gas in the gas supply pipe before it flows through the second heating component, and the outlet thermometer is used to detect the outlet temperature of the gas in the gas supply pipe after being heated by the second heating component.

[0010] Optionally, the liquid holding tank is a closed tank body, the top of the liquid holding tank is connected to an exhaust pipe, and the exhaust pipe is provided with an exhaust valve, and the exhaust pipe is provided with a flow meter at a position downstream of the exhaust valve; and / or, the liquid holding tank is installed with a pressure measuring component, and the pressure measuring component is used to detect the air pressure in the upper air cavity in the liquid holding tank.

[0011] The present invention also provides a temperature adjustment method, which is applied to the above-mentioned thermal stratification mitigation device, and the temperature adjustment method comprises:

[0012] Obtaining the actual temperature difference and direction of the temperature difference at a preset height of the liquid in the liquid holding pool;

[0013] Determine whether to enter the mitigation mode based on the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height;

[0014] If so, the control enters the relief mode, and in the relief mode, the air supply component is adjusted to the air supply state, and the heating power of the first heating component is adjusted according to the actual temperature difference and the temperature difference direction.

[0015] Optionally, the step of determining whether to enter the mitigation mode according to the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height includes:

[0016] If the absolute value of the actual temperature difference is greater than the absolute value of the target temperature difference, it is determined to enter the mitigation mode.

[0017] Optionally, the step of adjusting the heating power of the first heating component according to the actual temperature difference and the direction of the temperature difference includes:

[0018] If the actual temperature difference is greater than zero, determining that the downstream area in the temperature difference direction is a low-temperature area, and adjusting and increasing the heating power of the first heating component corresponding to the low-temperature area;

[0019] And / or, if the actual temperature difference is less than zero, the upstream area in the temperature difference direction is determined to be a low temperature area, and the heating power of the first heating component corresponding to the low temperature area is adjusted to increase.

[0020] Optionally, the step of adjusting and increasing the heating power of the first heating assembly corresponding to the low-temperature area includes:

[0021] The lower the liquid temperature in the corresponding height area of ​​the first heating component is, the greater the heating power increased by adjusting the first heating component.

[0022] Optionally, after determining that it is not necessary to enter the mitigation mode or exit the mitigation mode based on the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height, the temperature adjustment method further includes:

[0023] Obtain the actual average temperature of the liquid in the liquid holding pool;

[0024] The air supply state of the air supply component and the heating state of the second heating component are adjusted according to the actual average temperature and the target temperature.

[0025] Optionally, the step of adjusting the air supply state of the air supply component and the heating state of the second heating component according to the actual average temperature and the target temperature includes:

[0026] If the actual average temperature is greater than the target temperature, adjusting the air supply component to an air supply state, and adjusting the second heating component to an off state;

[0027] and / or, if the actual average temperature is lower than the target temperature, adjusting the air supply component to an air supply state, and adjusting the second heating component to a heating state;

[0028] And / or, if the actual average temperature is equal to the target temperature, the air supply component and the second heating component are both adjusted to a closed state.

[0029] Optionally, the step of adjusting the air supply component to the air supply state and adjusting the second heating component to the heating state includes:

[0030] Controlling the gas flow rate of the gas supply pipe to a first preset flow rate, turning on the second heating component to operate at a first preset heating power, and ensuring that the temperature of the gas in the gas supply pipe after being heated by the second heating component is greater than the actual average temperature;

[0031] If the actual average temperature is lower than the target temperature, the air supply flow rate of the air supply pipe is increased to a second preset flow rate, and the heating power of the second heating component is increased to a second preset heating power.

[0032] The thermal stratification mitigation device provided by the present invention adopts the above-mentioned temperature regulation method. When the thermal stratification phenomenon of the liquid in the liquid storage tank is relatively serious, the device is controlled to enter the mitigation mode. On the one hand, the air supply component is controlled to supply air to the lower area of ​​the liquid to disturb the liquid, thereby alleviating the thermal stratification phenomenon of the liquid by enhancing the heat exchange of the liquid in different height layers, improving the temperature uniformity of the liquid in different height layers, and correspondingly reducing the damage caused by the liquid to the liquid storage tank, thereby extending its service life; on the other hand, the heating power of the corresponding first heating component in the low-temperature area of ​​the liquid is controlled to be increased, and the temperature of the liquid in the low-temperature area is quickly increased by increasing the heating effect of the first heating component on the liquid in the low-temperature area, thereby quickly alleviating the thermal stratification phenomenon of the liquid and further reducing the damage caused by the thermal stratification phenomenon to the liquid storage tank. The air supply component and the first heating component are adjusted at the same time, and the two complement each other and can quickly and efficiently alleviate the thermal stratification phenomenon of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the process flow of the thermal stratification mitigation device provided by the present invention;

[0035] Figure 2 A schematic flow chart of a first temperature adjustment method provided in an embodiment of the present invention;

[0036] Figure 3 A schematic flow chart of a second temperature adjustment method provided in an embodiment of the present invention;

[0037] Figure 4 A schematic flow chart of a third temperature adjustment method provided in an embodiment of the present invention;

[0038] Figure 5 A schematic flow chart of a fourth temperature adjustment method provided in an embodiment of the present invention;

[0039] Figure 6 This is a flow chart of a fifth temperature adjustment method provided in an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 10-liquid; 100-liquid holding tank; 110-exhaust pipe; 120-exhaust valve; 130-flow meter; 140-pressure measuring assembly; 150-gas thermometer; 160-air cavity; 200-gas supply assembly; 210-gas supply source; 220-gas supply pipe; 230-first pressure detector; 240-heater H1; 250-inlet thermometer; 260-outlet thermometer; 270-gas supply valve; 280-auxiliary thermometer; 310-heater H2; 320-heater H3; 400-temperature measuring assembly; 410-first liquid thermometer; 420-second liquid thermometer; 430-third liquid thermometer; 440-fourth liquid thermometer; 450-fifth liquid thermometer; 460-sixth liquid thermometer; 470-seventh liquid thermometer; 480-eighth liquid thermometer. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] Figure 1 The flow diagram of the thermal stratification mitigation device provided in this embodiment includes a liquid holding pool 100, an air supply component 200, a first heating component and a temperature measuring component 400, wherein the liquid holding pool 100 is used to hold liquid 10; the air supply component 200 includes an air supply pipe 220, and the air outlet end of the air supply pipe 220 extends into the lower area of ​​the liquid holding pool 100; the first heating component is provided in the liquid holding pool 100, the number is at least two and they are arranged in the up and down direction, and are used to heat the liquid 10 in the corresponding height area in the liquid holding pool 100; the temperature measuring component 400 is provided in the liquid holding pool 100, and the temperature measuring component 400 includes at least two liquid thermometers arranged at intervals in the up and down direction, and the liquid thermometer is used to detect the liquid temperature in the corresponding height area in the liquid holding pool 100.

[0044] This embodiment also provides a temperature adjustment method, which is applied to the above-mentioned thermal stratification mitigation device. Figure 2 The flow chart of the first temperature adjustment method provided by the embodiment of the present invention is as follows. Figure 2 As shown, the temperature regulation method includes the following steps:

[0045] S202 obtains the actual temperature difference and the direction of the temperature difference at a preset height of the liquid 10 in the liquid holding pool 100.

[0046] Of any two liquid thermometers in the temperature measuring assembly 400, the upper liquid thermometer is the upper liquid thermometer, and the lower liquid thermometer is the lower liquid thermometer. The height difference between the upper and lower liquid thermometers is H, and the preset height is Δh. H / Δh = δ is calculated. During measurement, when the temperature difference is in the up-down direction, the temperature difference T can be obtained by subtracting the lower liquid thermometer's measured value Tup from the upper liquid thermometer's measured value Tdown. T / δ = ΔT is calculated, and ΔT is the actual temperature difference along the up-down direction at the preset height Δh. Similarly, when the temperature difference is in the down-up direction, the temperature difference can be obtained by subtracting the upper liquid thermometer's measured value Tup from the lower liquid thermometer's measured value Tdown. T / δ = ΔT is calculated, and ΔT is the actual temperature difference along the down-up direction at the preset height Δh. Specifically, when the number of liquid thermometers in the temperature measuring assembly 400 is greater than two, multiple sets of different upper and lower liquid thermometers can be used to obtain multiple sets of ΔT. These sets of ΔT are then averaged as the actual temperature difference of the liquid 10 at a predetermined height in the liquid reservoir 100 along the temperature difference direction, thereby improving the accuracy of the actual temperature difference. Preferably, the temperature measuring assembly 400 can be multiple sets, and the number of liquid thermometers in the multiple sets of temperature measuring assemblies 400 can be the same or different. The multiple sets of temperature measuring assemblies 400 are distributed in different areas within the liquid reservoir 100 to measure the temperature of different areas. By obtaining more sets of ΔT from multiple sets of temperature measuring assemblies 400 to calculate the actual temperature difference, the accuracy of the actual temperature difference can be further improved.

[0047] S204 determines whether to enter the mitigation mode based on the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height. If yes, execute step S206; if not, execute step S208.

[0048] By comparing the actual temperature difference with the preset target temperature difference after the liquid 10 in the liquid holding pool 100 is thermally stratified, the severity of the thermal stratification phenomenon of the liquid 10 in the current liquid holding pool 100 is judged. When the thermal stratification phenomenon is more serious, it indicates that the temperature distribution of the liquid is highly uneven and may cause damage to the liquid holding pool 100, and it is necessary to control the thermal stratification mitigation device to enter the mitigation mode; when the degree of the thermal stratification phenomenon is less, the thermal stratification mitigation device can be controlled to maintain the current mode.

[0049] S206 controls entry into the relief mode, and in the relief mode, adjusts the air supply component 200 to the air supply state, and adjusts the heating power of the first heating component according to the actual temperature difference and the direction of the temperature difference.

[0050] When it is determined based on the actual temperature difference and the target temperature difference that the thermal stratification phenomenon of the liquid 10 in the liquid holding pool 100 is more serious, the thermal stratification mitigation device is controlled to enter the mitigation mode. The specific mitigation operation includes: adjusting the gas supply component 200 to the gas supply state, and the gas supply component 200 supplies gas to the lower area of ​​the liquid 10 in the liquid holding pool 100 through the gas supply pipe 220. The output gas moves upward in the form of bubbles from the lower area of ​​the liquid 10, thereby disturbing the liquid 10 from the bottom to the top, and correspondingly enhancing the heat exchange between the liquids 10 at different height layers, so as to improve the temperature uniformity of the liquids 10 at different height layers, thereby effectively mitigating the severity of the thermal stratification phenomenon of the liquid 10, and correspondingly improving the temperature distribution uniformity of the liquid 10, thereby reducing the damage to the liquid holding pool 100. At the same time, the relief operation of the relief mode also includes adjusting the heating power of the first heating component according to the actual temperature difference and the direction of the temperature difference. When the liquid 10 in the liquid holding pool 100 produces thermal stratification, generally, the temperature of the liquid 10 tends to gradually increase or decrease from top to bottom. The temperature change trend of the liquid 10 in the liquid holding pool 100 can be determined according to the positive or negative actual temperature difference and the direction of the temperature difference. Then, the heating power of the first heating component corresponding to the low-temperature area is increased. Accordingly, the heating effect of the first heating component on the low-temperature area is improved, thereby quickly increasing the temperature of the liquid 10 in the low-temperature area, so that the temperature of the liquid 10 in the low-temperature area quickly approaches the temperature of the liquid 10 in the high-temperature area, and accordingly quickly alleviating the severity of the thermal stratification of the liquid 10.

[0051] S208 ends, and the thermal stratification of the liquid 10 is alleviated.

[0052] The thermal stratification mitigation device of this embodiment adopts the above-mentioned temperature regulation method. When the thermal stratification phenomenon of the liquid 10 in the liquid holding pool 100 is relatively serious, the device is controlled to enter the mitigation mode. On the one hand, the gas supply component 200 is controlled to supply gas to the lower area of ​​the liquid 10 to disturb the liquid 10. By enhancing the heat exchange of the liquid 10 at different height layers, the thermal stratification phenomenon of the liquid 10 is alleviated, the temperature uniformity of the liquid 10 at different height layers is improved, and the damage caused by the liquid 10 to the liquid holding pool 100 is correspondingly reduced, thereby extending its service life. On the other hand, the heating power of the first heating component corresponding to the low-temperature area of ​​the liquid 10 is controlled to be increased. By increasing the heating effect of the first heating component on the liquid 10 in the low-temperature area, the temperature of the liquid 10 in the low-temperature area is quickly increased, thereby quickly alleviating the thermal stratification phenomenon of the liquid 10 and further reducing the damage caused by the thermal stratification phenomenon to the liquid holding pool 100. The gas supply component 200 and the first heating component are adjusted at the same time. The two complement each other and can quickly and efficiently alleviate the thermal stratification phenomenon of the liquid 10.

[0053] Specifically, the liquid holding pool can be a molten pool of metal; the first heating component can adopt a patch-type copper heating component, a segmented winding heating wire or a segmented electromagnetic heating component, etc.; the liquid thermometer can adopt a high-temperature K-type thermocouple.

[0054] In the present embodiment, the above-mentioned step of judging whether to enter the relief mode according to the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height includes: if the absolute value of the actual temperature difference is greater than the absolute value of the target temperature difference, it is determined to enter the relief mode. When the absolute value of the actual temperature difference is greater than the target temperature difference, it is characterized that the severity of the thermal stratification phenomenon of the liquid 10 is higher than the preset target, and it is determined that the thermal stratification relief device enters the relief mode to perform a relief operation on the thermal stratification phenomenon of the liquid 10. Among them, when the temperature reduction trend of the liquid 10 along the height direction is opposite to the temperature difference direction, the actual temperature difference obtained is a negative value, and the target temperature difference is also a negative value accordingly. At this time, the actual temperature difference and the target temperature difference need to be removed from the absolute value to characterize the size of their temperature difference. As the relief mode proceeds, the thermal stratification phenomenon of the liquid 10 is gradually alleviated, and accordingly, the absolute value of the actual temperature difference gradually decreases. When it is reduced to an absolute value equal to the target temperature difference, it is characterized that the current thermal stratification phenomenon of the liquid 10 has reached the preset target, and the corresponding control relief device exits the relief mode.

[0055] Optionally, in this embodiment, the step of adjusting the heating power of the first heating component according to the actual temperature difference and the direction of the temperature difference includes: if the actual temperature difference is greater than zero, determining that the downstream area in the temperature difference direction is a low temperature area, and adjusting and increasing the heating power of the first heating component corresponding to the low temperature area. When the temperature difference direction is the up-down direction, the upper liquid thermometer is located upstream and the lower liquid thermometer is located downstream, (T 上 -T 下 ) / δ=△T>0, then T上 >T 下 , the temperature of the area corresponding to the upper liquid thermometer, i.e., the upstream area, is higher, while the temperature of the area corresponding to the lower liquid thermometer, i.e., the downstream area, is lower, thereby determining that the lower area of ​​the liquid 10 is a low-temperature area, and accordingly increasing the heating power of the first heating component located in the lower area, to quickly increase the temperature of the liquid 10 in the lower area, making it quickly approach the temperature of the liquid 10 in the upper high-temperature area, thereby quickly alleviating the thermal stratification phenomenon of the liquid 10. Similarly, when the temperature difference direction is downward and upward, the lower liquid thermometer is located upstream and the upper liquid thermometer is located downstream, (T 下 -T 上 ) / δ=△T>0, then T 下 >T 上 The temperature of the corresponding area of ​​the lower liquid thermometer, that is, the upstream area, is higher, and the temperature of the corresponding area of ​​the upper liquid thermometer, that is, the downstream area, is lower, so that the upper area of ​​the liquid 10 is determined to be a low-temperature area, and the heating power of the first heating component located in the upper area is increased accordingly to quickly increase the temperature of the liquid 10 in the upper area, so that it quickly approaches the temperature of the liquid 10 in the lower high-temperature area, thereby quickly alleviating the thermal stratification phenomenon of the liquid 10.

[0056] Similarly, in this embodiment, the step of adjusting the heating power of the first heating component according to the actual temperature difference and the direction of the temperature difference further includes: if the actual temperature difference is less than zero, determining that the upstream area in the temperature difference direction is a low-temperature area, and adjusting and increasing the heating power of the first heating component corresponding to the low-temperature area. The actual temperature difference is the difference between the temperature value of the upstream area and the temperature value of the downstream area of ​​the liquid 10 along the temperature difference direction. If the difference is less than zero, it means that the temperature value of the downstream area of ​​the liquid 10 along the temperature difference direction is larger. Accordingly, the temperature of the liquid 10 along the temperature difference direction shows a trend of gradually increasing, thereby determining that the upstream area of ​​the liquid 10 along the temperature difference direction is a low-temperature area, and correspondingly increasing the heating power of the first heating component located in the low-temperature area to quickly increase the temperature of the liquid 10 in the low-temperature area so that it quickly approaches the temperature of the liquid 10 in the high-temperature area, thereby quickly alleviating the thermal stratification phenomenon of the liquid 10.

[0057] Specifically, in this embodiment, the above-mentioned step of adjusting and increasing the heating power of the first heating component corresponding to the low-temperature area includes: the lower the temperature of the liquid in the height area corresponding to the first heating component, the greater the heating power of the first heating component is adjusted to be increased. The temperature of different height areas of the liquid 10 can be obtained by multiple liquid thermometers in the temperature measuring component 400. Among the multiple first heating components, the heating power of one or more first heating components located at the end of the high-temperature area remains unchanged, and the areas corresponding to the other first heating components are low-temperature areas. Then, the lower the temperature of the height area, the greater the heating power of the first heating components in the corresponding height area is increased, so that different height areas of the liquid 10 in the low-temperature area can approach the temperature of the high-temperature area at approximately the same speed, thereby further improving the speed of alleviating the thermal stratification phenomenon, reducing the uneven distribution of heating power of each first heating component in the low-temperature area and causing new thermal stratification, which affects the occurrence of the thermal stratification mitigation speed phenomenon.

[0058] In the thermal stratification mitigation device provided in this embodiment, the gas supply pipe 220 may be provided with a second heating component, an inlet thermometer 250, and an outlet thermometer 260, wherein the second heating component is used to heat the gas flowing through the corresponding area, the inlet thermometer 250 is used to detect the inlet temperature of the gas in the gas supply pipe 220 before it flows through the second heating component, and the outlet thermometer 260 is used to detect the outlet temperature of the gas in the gas supply pipe 220 after it is heated by the second heating component. Specifically, Figure 1 As shown, the second heat exchange component is a heater H1240 and is connected in series to the air supply pipe 220; or, the second heat exchange component can also be coated on the outer wall of the air supply pipe 220.

[0059] In addition to the above-mentioned function of alleviating the thermal stratification phenomenon of the liquid 10, the thermal stratification mitigation device can also finely adjust the temperature of the liquid 10 in the molten pool. After judging whether it is not necessary to enter the mitigation mode or exit the mitigation mode based on the actual temperature difference and the target temperature difference of the same temperature difference direction at the preset height, the temperature adjustment method includes: obtaining the actual average temperature of the liquid 10 in the liquid pool 100; adjusting the gas supply state of the gas supply component 200 and the heating state of the second heating component based on the actual average temperature and the target temperature. Initially, each first heating component operates at a preset heating power to roughly heat the liquid 10 in the liquid pool 100 to the target temperature. When the above-mentioned method is used to determine whether the mitigation device needs to enter the mitigation mode to perform mitigation operations on the thermal stratification phenomenon of the liquid 10, when the mitigation device does not need to enter the mitigation mode or needs to enter the mitigation mode and has completed the mitigation operation and exited the mitigation mode, the first heating component maintains the preset heating power and continues to finely adjust the temperature to improve the accuracy of the liquid temperature on the basis of uniform distribution of the liquid temperature; specifically, the temperature measured by each liquid thermometer in the temperature measuring component 400 can be obtained. value, and average multiple temperature values ​​to obtain the actual average temperature of the liquid 10, and then judge whether the current temperature of the liquid 10 is higher or lower than the target temperature by comparing the actual average temperature and the target temperature, so as to adjust the temperature of the gas input into the liquid 10 by controlling the second heating component 200, and the gas entering the liquid 10 disturbs the liquid 10 from bottom to top while performing heat exchange with the liquid 10, thereby achieving fine adjustment of the liquid temperature and disturbing the liquid 10 at the same time, so as to improve the temperature uniformity of the liquid 10 and reduce the occurrence of local temperature changes and thermal stratification of the liquid.

[0060] Specifically, in this embodiment, the step of adjusting the gas supply state of the gas supply component 200 and the heating state of the second heating component according to the actual average temperature and the target temperature includes: if the actual average temperature is greater than the target temperature, adjusting the gas supply component 200 to the gas supply state, and adjusting the second heating component to the off state. The initial temperature of the gas input by the gas supply component 200 is generally room temperature, which is lower than the temperature of the liquid 10 in the liquid tank 100; when the actual average temperature is greater than the target temperature, it indicates that the temperature of the liquid 10 is too high and needs to be cooled. The second heating component is controlled to be off, and the gas supply component 200 is controlled to input low-temperature gas into the liquid 10. The low-temperature gas cools the liquid 10 during its upward movement, and at the same time, it generates disturbances in the liquid 10 to improve the temperature uniformity of the liquid 10.

[0061] If the actual average temperature is lower than the target temperature, the gas supply assembly 200 is adjusted to the gas supply state, and the second heating assembly is adjusted to the heating state. When the actual average temperature is lower than the target temperature, it indicates that the temperature of the liquid 10 is too low and needs to be heated. The second heating assembly and the gas supply assembly 200 are controlled to be turned on. The gas delivered by the gas supply assembly 200 must first be heated by the second heating assembly before reaching the liquid 10. The gas is heated by the second heating assembly to a temperature higher than the actual average temperature, preferably higher than the target temperature, before entering the liquid 10. The gas releases heat to the liquid 10 and disturbs it during its upward movement in the liquid 10, thereby achieving uniform heating of the liquid 10 and allowing the liquid 10 to quickly reach the target temperature.

[0062] Specifically, the steps of adjusting the gas supply assembly 200 to the gas supply state and the second heating assembly to the heating state include: controlling the gas flow rate of the gas supply pipe 220 to a first preset flow rate, turning on the second heating assembly to operate at a first preset heating power, and ensuring that the temperature of the gas in the gas supply pipe 220 after being heated by the second heating assembly is greater than the actual average temperature; if the actual average temperature is less than the target temperature, increasing the gas flow rate of the gas supply pipe 220 to a second preset flow rate and increasing the heating power of the second heating assembly to a second preset heating power. When the temperature of the liquid 10 needs to be raised, the gas supply pipe 220 is first controlled to operate at a lower gas flow rate and the second heating assembly to operate at a lower heating power to reduce the risk of excessive regulation of the liquid 10 caused by a higher gas flow rate and higher heating power; when the temperature of the liquid 10 is not sufficiently regulated by the first preset flow rate and the first preset heating power, the gas flow rate can be gradually increased to the second preset flow rate and the heating power can be increased to the second preset heating power to increase the speed of regulating the temperature of the liquid 10 and quickly reach the target temperature.

[0063] Specifically, the inlet temperature measured by the inlet thermometer 250 can represent the initial temperature of the gas; when the second heating component is in the heating state, the outlet temperature measured by the outlet thermometer 260 can represent the temperature of the gas entering the liquid 10 after being heated.

[0064] When the actual average temperature of the liquid 10 is finely adjusted to be equal to the target temperature through the second heating component and the air supply component 200, or initially, the actual average temperature is equal to the target temperature, the air supply component 200 and the second heating component are both adjusted to be in the closed state, and the first heating component heats the liquid 10 at a preset heating power.

[0065] Optionally, in this embodiment, the gas supply assembly 200 may further include a gas supply source 210, which is connected to the gas inlet end of the gas supply pipe 220, and the gas supply pipe 220 is provided with a gas supply valve 270. The gas supply source 210 is used to supply gas and the required power to the liquid 10. The gas supply state of the gas supply source 210 to the liquid 10 can be changed by adjusting the on / off state of the gas supply valve 270, and the gas flow rate of the gas supply source 210 to the liquid 10 can be adjusted by adjusting the opening of the gas supply valve 270. Specifically, the section of the gas supply pipe 220 located upstream of the second heating component is installed with a first pressure detector 230, and the first pressure detector 230 is used to detect the pressure of the gas supply source 210; preferably, the section of the gas supply pipe 220 located downstream of the gas supply valve 270 is installed with an auxiliary thermometer 280, and the auxiliary thermometer 280 is closer to the liquid 10 than the outlet thermometer 260, and the temperature value detected by it is closer to the actual temperature value of the gas entering the liquid 10, thereby improving the control accuracy.

[0066] In this embodiment, the liquid holding tank 100 may be a closed tank body. An exhaust pipe 110 is connected to the top of the liquid holding tank 100, and the exhaust pipe 110 is provided with an exhaust valve 120. The exhaust pipe 110 is provided with a flow meter 130 downstream of the exhaust valve 120. The liquid holding tank 100 is a closed tank body. When the liquid 10 contained in the liquid holding tank 100 is a metal solution or other liquid 10 that needs to be prevented from contact with air, the gas supply source 210 can be an inert gas, such as argon. While achieving temperature regulation of the liquid, the liquid holding tank 100 can be provided with an inert atmosphere to effectively reduce oxidation reactions of the liquid 10 and ensure its quality. Specifically, when the gas supply source 210 supplies gas, the exhaust valve 120 needs to be opened first to reduce the danger caused by excessive air pressure in the liquid tank 100; wherein, the flow meter 130 can detect the exhaust flow of the exhaust pipe 110 in real time, thereby detecting the working status of the gas supply valve 270 and the exhaust valve 120, and effectively identifying the occurrence of a situation where the gas supply valve 270 fails to adjust the temperature of the liquid 10 or the exhaust valve 120 fails and the gas cannot be discharged, and accordingly discovering and responding to the fault in time to reduce the danger caused by the fault; in addition, the flow of the flow meter 130 can also be used to characterize the gas supply flow of the gas supply pipe 220.

[0067] In this embodiment, a pressure measuring assembly 140 can also be installed in the liquid holding pool 100. The pressure measuring assembly 140 is used to detect the air pressure in the upper area of ​​the liquid holding pool 100 to effectively identify the air pressure in the air cavity 160 in the upper area of ​​the liquid holding pool 100. When the air pressure in the air cavity 160 is too high, it is necessary to increase the opening of the exhaust valve 120 or to repair the equipment to reduce the occurrence of phenomena such as hard gas explosions caused by the air pressure in the air cavity 160 exceeding the safety threshold, thereby improving the safety of the equipment. Similarly, a gas thermometer 150 can also be installed in the liquid holding pool 100. The gas thermometer 150 is used to detect the temperature of the upper air cavity 160 in the liquid holding pool 100. The temperature value detected by the temperature gas thermometer 150 can be used to evaluate the environment in the liquid holding pool 100 to more accurately understand the situation in the liquid holding pool 100.

[0068] Figure 3 The figure is a flow chart of a second temperature adjustment method provided according to an embodiment of the present invention.

[0069] like Figure 2 As shown, the temperature regulation method includes the following steps:

[0070] S301 obtains the actual temperature difference and temperature difference direction of the liquid 10 at a preset height in the liquid holding pool 100.

[0071] S302 determines whether the absolute value of the actual temperature difference is greater than the absolute value of the target temperature difference. If so, step S303 is executed; if not, step S306 is executed.

[0072] S303 determines to enter the relief mode, adjusts the air supply assembly 200 to the air supply state, and determines whether the actual temperature difference is greater than zero. If so, execute step S304; if not, execute step S305.

[0073] S304 determines that the downstream area in the temperature difference direction is a low-temperature area, and adjusts and increases the heating power of the first heating component corresponding to the low-temperature area.

[0074] S305 determines that the upstream area in the temperature difference direction is a low temperature area, and adjusts and increases the heating power of the first heating component corresponding to the low temperature area.

[0075] S306 ends, and the thermal stratification of the liquid 10 is alleviated.

[0076] Figure 4 Schematic diagram of the process of the third temperature adjustment method provided in an embodiment of the present invention. Figure 1As shown, the solution pool is a closed pool body, and the gas supply component 200 includes a gas supply source 210 and a gas supply pipe 220 connected between the gas supply source 210 and the solution pool, and the gas supply pipe 220 is provided with a heater H1240 and a gas supply valve 270 in sequence along the gas supply direction; the solution pool is provided with an exhaust pipe 110 connected to its upper air cavity 160, and the exhaust pipe 110 is provided with an exhaust valve 120. There are two groups of temperature measuring components 400 in the liquid holding pool 100. The two groups of temperature measuring components 400 are distributed in different areas and different height areas of the liquid holding pool 100. The number of liquid thermometers in each group of temperature measuring components 400 is four, and the four liquid thermometers in the same group of temperature measuring components 400 are arranged at equal intervals along the height direction, with a specific interval of △h; specifically, the four liquid thermometers of one group of temperature measuring components 400 are, from top to bottom, the first liquid thermometer, the second liquid thermometer, the third liquid thermometer and the fourth liquid thermometer, and the liquid temperatures detected by the four are T1, T2, T3 and T4 respectively; the four liquid thermometers of the other group of temperature measuring components 400 are, from top to bottom, the fifth liquid thermometer, the sixth liquid thermometer, the seventh liquid thermometer and the eighth liquid thermometer, and the liquid temperatures detected by the four are T5, T6, T7 and T8 respectively. There are two first heating components, the upper one is heater H2310 and the lower one is heater H3320. Figure 4 The temperature regulation method adopts Figure 1 The thermal stratification mitigation device shown, the temperature regulation method comprises the following steps:

[0077] S401 sets the temperature difference direction to the up-down direction, the preset height to △h, and the target temperature difference to T svb ; Get T1~T8, calculate the actual temperature difference △T = [(T2-T1)+(T3-T2)+(T4-T3)+(T6-T5)+(T7-T6)+(T8-T7)] / 6.

[0078] S402 determines whether |△T| is greater than |T svb If yes, proceed to step S403; if no, proceed to step S406.

[0079] S403 determines to enter the relief mode, adjusts and opens the air supply valve and the exhaust valve, and determines whether ΔT is greater than 0; if so, executes step S404; if not, executes step S405.

[0080] S404 determines that the upper area of ​​the liquid is a low-temperature area, and adjusts and increases the heating power of the heater H2.

[0081] S405 determines that the lower area is a low temperature area, and adjusts and increases the heating power of the heater H3.

[0082] S406 ends.

[0083] Figure 5 This is a flow chart of the fourth temperature regulation method provided according to an embodiment of the present invention. Figure 5 The temperature adjustment method shown is as follows: Figure 5 As shown, the temperature regulation method includes the following steps:

[0084] S501 obtains the actual average temperature of the liquid in the liquid holding pool.

[0085] S502 determines whether the actual average temperature is greater than the target temperature. If so, step S503 is executed; if not, step S504 is executed.

[0086] S503 adjusts the air supply component to the air supply state and adjusts the second heating component to the off state. During the execution of step S503, step S501 is continuously executed.

[0087] S504 determines whether the actual average temperature is equal to the target temperature. If not, execute step S505; if so, execute step S506.

[0088] S505 adjusts the air supply component to the air supply state and adjusts the second heating component to the heating state. During the execution of step S505, step S501 is continuously executed.

[0089] S506 adjusts the air supply component and the second heating component to be in a closed state.

[0090] End, complete the fine adjustment of liquid temperature.

[0091] Figure 6 Schematic diagram of a fifth temperature adjustment method according to an embodiment of the present invention. Figure 6 The temperature regulation method adopts Figure 1 The thermal stratification mitigation device shown, the temperature regulation method comprises the following steps:

[0092] S601 sets the target temperature to T sv , obtain T1~T8, calculate the actual average temperature T o =(T1+T2+T3+T4+T5+T6+T7+T8) / 8.

[0093] S602 determines T o Is it greater than T sv If yes, go to step S603; if no, go to step S604.

[0094] S603 opens the air supply valve and the exhaust valve, and adjusts the heater H1 to be in the off state. During the execution of step S603, step S601 is continuously executed.

[0095] S604 determines T o Is it equal to T sv If not, execute step S605; if so, execute step S606.

[0096] S605 adjusts the air supply valve to the first preset opening, the heater H1 to the first preset heating power, and opens the exhaust valve. The temperature of the gas in the air supply pipe after being heated by the heater H1 is greater than T o .

[0097] S606 increases the air supply valve to a second preset opening and the heater H1 to a second preset heating power. During the execution of step S606, step S601 is continuously executed.

[0098] S607 Close the air supply valve, exhaust valve and heater H1.

[0099] End, complete the fine adjustment of liquid temperature.

[0100] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0101] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature regulation method, characterized in that: Applied to a thermal stratification mitigation device, the temperature regulation method includes: Obtaining an actual temperature difference and a direction of the temperature difference at a preset height of the liquid (10) in the liquid holding pool (100); Determine whether to enter the mitigation mode based on the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height; If so, the control enters the relief mode, and in the relief mode, the air supply component (200) is adjusted to the air supply state, and the heating power of the first heating component is adjusted according to the actual temperature difference and the direction of the temperature difference; Wherein, the step of adjusting the heating power of the first heating component according to the actual temperature difference and the direction of the temperature difference includes: If the actual temperature difference is greater than zero, determining that the downstream area in the temperature difference direction is a low-temperature area, and adjusting and increasing the heating power of the first heating component corresponding to the low-temperature area; And / or, if the actual temperature difference is less than zero, the upstream area in the temperature difference direction is determined to be a low temperature area, and the heating power of the first heating component corresponding to the low temperature area is adjusted to increase.

2. The temperature adjustment method according to claim 1, wherein: The step of determining whether to enter the mitigation mode according to the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height includes: If the absolute value of the actual temperature difference is greater than the absolute value of the target temperature difference, it is determined to enter the mitigation mode.

3. The temperature adjustment method according to claim 1, wherein: The step of adjusting and increasing the heating power of the first heating component corresponding to the low temperature area includes: The lower the liquid temperature in the corresponding height area of ​​the first heating component is, the greater the heating power increased by adjusting the first heating component.

4. The temperature adjustment method according to any one of claims 1 to 3, characterized in that: After determining that there is no need to enter or exit the mitigation mode based on the actual temperature difference and the target temperature difference in the same temperature difference direction at the preset height, the temperature adjustment method further includes: Obtaining the actual average temperature of the liquid (10) in the liquid holding pool (100); The air supply state of the air supply component (200) and the heating state of the second heating component are adjusted according to the actual average temperature and the target temperature.

5. The temperature adjustment method according to claim 4, characterized in that: The step of adjusting the air supply state of the air supply component (200) and the heating state of the second heating component according to the actual average temperature and the target temperature includes: If the actual average temperature is greater than the target temperature, adjusting the air supply component (200) to an air supply state, and adjusting the second heating component to an off state; and / or, if the actual average temperature is lower than the target temperature, adjusting the air supply component (200) to an air supply state, and adjusting the second heating component to a heating state; And / or, if the actual average temperature is equal to the target temperature, the air supply component (200) and the second heating component are both adjusted to a closed state.

6. The temperature adjustment method according to claim 5, characterized in that: The step of adjusting the air supply component (200) to the air supply state and adjusting the second heating component to the heating state comprises: Controlling the gas supply flow rate of the gas supply pipe (220) to a first preset flow rate, turning on the second heating component to operate at a first preset heating power, and ensuring that the temperature of the gas in the gas supply pipe (220) after being heated by the second heating component is greater than the actual average temperature; If the actual average temperature is lower than the target temperature, the air supply flow rate of the air supply pipe (220) is increased to a second preset flow rate, and the heating power of the second heating component is increased to a second preset heating power.

7. A thermal stratification mitigation device, characterized in that: The temperature regulation method according to any one of claims 1 to 6 can be performed, wherein the thermal stratification mitigation device comprises: A liquid holding tank (100) for holding liquid (10); An air supply assembly (200) includes an air supply pipe (220), wherein the air outlet end of the air supply pipe (220) extends into the lower area of ​​the liquid holding tank (100); a first heating assembly, provided in the liquid holding pool (100), with at least two of the first heating assembly being arranged in an up-down direction and configured to heat the liquid (10) in a corresponding height region within the liquid holding pool (100); and A temperature measuring component (400) is provided in the liquid containing pool (100), the temperature measuring component (400) comprising at least two liquid thermometers spaced apart in the vertical direction, the liquid thermometers being used to detect the temperature of the liquid in the corresponding height area in the liquid containing pool (100).

8. The thermal stratification mitigation device according to claim 7, characterized in that: The gas supply pipe (220) is provided with a second heating component, an inlet thermometer (250) and an outlet thermometer (260), wherein the second heating component is used to heat the gas flowing through the corresponding area, the inlet thermometer (250) is used to detect the inlet temperature of the gas in the gas supply pipe (220) before it flows through the second heating component, and the outlet thermometer (260) is used to detect the outlet temperature of the gas in the gas supply pipe (220) after it is heated by the second heating component.

9. The thermal stratification mitigation device according to claim 7, characterized in that: The liquid holding pool (100) is a closed pool body, the top of the liquid holding pool (100) is connected to an exhaust pipe (110), and the exhaust pipe (110) is provided with an exhaust valve (120), and the exhaust pipe (110) is provided with a flow meter (130) at a position downstream of the exhaust valve (120); and / or, the liquid holding pool (100) is installed with a pressure measuring assembly (140), and the pressure measuring assembly (140) is used to detect the air pressure of the upper air cavity (160) in the liquid holding pool (100).

Images