Heat exchange tube scaling thickness detection method and device, electronic equipment and storage medium

Abstract

The invention discloses a heat exchange tube scaling thickness detection method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring the first total thermal resistance of a heat exchange tube according to the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment and the difference between the condensed water temperature and the saline water temperature at the current moment; acquiring second total heat resistance of the heat exchange tube according to heat transfer heat resistance of the inner surface of the heat exchange tube, conduction heat resistance of the tube wall of the heat exchange tube, heat resistance of the scale layer of the heat exchange tube and heat transfer heat resistance of the outer surface of the scale layer of the heat exchange tube; and based on the fact that the first total heat resistance of the heat exchange tube is equal to the second total heat resistance of the heat exchange tube, an equivalent relation is established, and the scaling layer thickness of the heat exchange tube is obtained according to the equivalent relation. According to the heat exchange tube scaling thickness detection method disclosed by the invention, the scaling thickness calculation model of the heat exchange tube is obtained, so that quantitative detection of the scaling thickness of the heat exchange tube is realized.

Description

Technical Field

[0001] The invention relates to the technical field of seawater desalination, and in particular to a method, a device, an electronic device and a storage medium for detecting scaling thickness of a heat exchange tube. Background Art

[0002] In seawater desalination technology, seawater is heated by steam or hot water to evaporate. The evaporated water vapor condenses into fresh water and eventually collects in the fresh water storage system. The heat exchange tube is a component that realizes the heat exchange between high-temperature steam and seawater. When the heat exchange tube is scaled, the thermal conductivity of the scale layer is very small, which seriously affects the heat exchange efficiency and heat exchange performance of the evaporator heat exchange tube of the seawater desalination system, and greatly reduces the water production ratio. At the same time, the scale layer will also cause under-scale corrosion, causing corrosion and damage to the heat exchange tube, and seawater will enter the fresh water side, seriously affecting the water quality.

[0003] In the prior art, the detection of the scaling of the heat exchange tubes is to make a qualitative judgment on the scaling of the heat exchange tubes according to the operating status of the heat exchanger. That is, the prior art can only determine whether the heat exchange tubes are scaled, and the obtained detection results of the scaling of the heat exchange tubes cannot be quantitatively analyzed. Summary of the invention

[0004] The present invention provides a method, a device, an electronic device and a storage medium for detecting the scaling thickness of a heat exchange tube, so as to realize the quantitative detection of the scaling thickness of the heat exchange tube.

[0005] In a first aspect, the present invention provides a method for detecting the scaling thickness of a heat exchange tube, the method comprising:

[0006] The first total thermal resistance of the heat exchange tube is obtained according to the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment, and the temperature difference between the condensate temperature and the brine at the current moment; wherein the initial moment is the moment when the seawater desalination system equipment is initially put into operation or the moment when the seawater desalination system is first put into operation after the heat exchange tube is chemically cleaned, and the current moment is the moment when the scale thickness of the heat exchange tube is detected after the heat exchange tube is scaled;

[0007] Obtaining a second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the thermal resistance of the convective heat transfer of the outer surface of the scale layer of the heat exchange tube;

[0008] An equivalence relationship is established based on that the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube are equal, and the thickness of the scaling layer of the heat exchange tube is calculated according to the equivalence relationship.

[0009] Optionally, before obtaining the first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment, and the temperature difference between the condensate water temperature and the brine at the current moment, the method further includes:

[0010] The heat transfer rate of the heat exchange tube at the initial moment is obtained according to the temperature difference between the condensate water and the brine at the initial moment, the heat transfer resistance of the inner surface of the heat exchange tube, the convection heat transfer resistance of the outer surface of the heat exchange tube, and the conduction heat resistance of the heat exchange tube wall;

[0011] Obtaining the water production ratio of the seawater desalination system at the initial moment according to the flow rate of distilled water at the initial moment, the flow rate of condensed water at the initial moment, and the flow rate of input steam at the initial moment;

[0012] Obtaining the water production ratio of the seawater desalination system at the current moment according to the flow rate of distilled water at the current moment, the flow rate of condensed water at the current moment, and the flow rate of input steam at the current moment;

[0013] The temperature difference between the condensate water temperature and the brine temperature at the current moment is obtained according to the temperature of the condensate water at the current moment and the temperature of the first-effect brine at the current moment.

[0014] Optionally, the first total thermal resistance of the heat exchange tube is:

[0015] R S1 =T1×C0 / (Q0×C1);

[0016] Among them, R S1 is the first total thermal resistance of the heat exchange tube, T1 is the temperature difference between the condensate water and the brine at the current moment, C0 is the water production ratio of the seawater desalination system at the initial moment, Q0 is the heat transfer rate of the heat exchange tube at the initial moment, and C1 is the water production ratio of the seawater desalination system at the current moment.

[0017] Optionally, before obtaining the second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube and the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube, the method further includes:

[0018] Obtaining the heat transfer resistance of the inner surface of the heat exchange tube according to the convection heat transfer coefficient of the steam in the heat exchange tube, the inner diameter of the heat exchange tube, and the length of the heat exchange tube;

[0019] Obtaining the conduction thermal resistance of the wall of the heat exchange tube according to the outer diameter of the heat exchange tube, the inner diameter of the heat exchange tube, the thermal conductivity of the heat exchange tube and the length of the heat exchange tube;

[0020] Obtaining the thermal resistance of the scale layer on the heat exchange tube according to the thickness of the scale layer on the heat exchange tube, the outer diameter of the heat exchange tube, the thermal conductivity of the scale on the heat exchange tube and the length of the heat exchange tube;

[0021] The thermal resistance of the convective heat transfer on the outer surface of the scale layer of the heat exchange tube is obtained according to the convective heat transfer coefficient of seawater, the outer diameter of the heat exchange tube, the thickness of the scale layer of the heat exchange tube, and the length of the heat exchange tube.

[0022] Optionally, the second total thermal resistance of the heat exchange tube is:

[0023] R S2 =R1+R3+R4+R5;

[0024] Among them, R S2 is the second total thermal resistance of the heat exchange tube, R1 is the heat transfer resistance of the inner surface of the heat exchange tube, R3 is the conduction resistance of the heat exchange tube wall, R4 is the thermal resistance of the scale layer of the heat exchange tube, and R5 is the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube.

[0025] Optionally, the thermal resistance of convective heat transfer on the outer surface of the heat exchange tube scale layer is 10% of the thermal resistance of the heat exchange tube scale layer.

[0026] Optionally, the scaling layer thickness of the heat exchange tube is:

[0027] H=(EXP((2×3.14×λ1×L)×(T1×C0 / (Q0×C1)-1 / (K1×3.14×D2×L)-ln

[0028] (D1 / D2) / (2×3.14×λ2×L)) / 1.1)-D1) / 2;

[0029] Among them, H is the scaling layer thickness of the heat exchange tube, λ1 is the thermal conductivity of scaling of the heat exchange tube, L is the length of the heat exchange tube, T1 is the temperature difference between the condensate water temperature and the brine temperature at the current moment, C0 is the water production ratio of the seawater desalination system at the initial moment, Q0 is the heat transfer rate of the heat exchange tube at the initial moment, C1 is the water production ratio of the seawater desalination system at the current moment, K1 is the convective heat transfer coefficient of the steam in the heat exchange tube, D2 is the inner diameter of the heat exchange tube, L is the length of the heat exchange tube, D1 is the outer diameter of the heat exchange tube, D2 is the inner diameter of the heat exchange tube, and λ2 is the thermal conductivity of the heat exchange tube.

[0030] According to another aspect of the present invention, a device for detecting the thickness of scale deposited on a heat exchange tube is provided to implement the method for detecting the thickness of scale deposited on a heat exchange tube according to any embodiment of the present invention. The device comprises:

[0031] A first total thermal resistance acquisition module for the heat exchange tube, used to acquire the first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at an initial moment, the water production ratio of the seawater desalination system at an initial moment, the water production ratio of the seawater desalination system at a current moment, and the temperature difference between the condensate water temperature and the brine at a current moment;

[0032] A second total thermal resistance acquisition module for the heat exchange tube, used to acquire the second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the thermal resistance of the convective heat transfer on the outer surface of the scale layer of the heat exchange tube;

[0033] The equivalent relationship establishment and solving module is used to establish an equivalent relationship based on the equality of the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube, and obtain the scaling layer thickness of the heat exchange tube according to the equivalent relationship.

[0034] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0035] at least one processor; and

[0036] a memory communicatively connected to the at least one processor; wherein,

[0037] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the heat exchange tube scaling thickness detection method described in any embodiment of the present invention.

[0038] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the heat exchange tube scaling thickness detection method described in any embodiment of the present invention when executed.

[0039] The heat exchange tube scaling thickness detection method, device, electronic device and storage medium of the embodiment of the present invention, wherein in the heat exchange tube scaling thickness detection method, the total thermal resistance of the heat exchange tube is calculated by two different calculation methods and different parameters, that is, the first total thermal resistance and the second total thermal resistance are obtained. The scaling layer thickness of the heat exchange tube is obtained according to the equal relationship between the first total thermal resistance and the second total thermal resistance. The scaling thickness of the heat exchange tube can be quantitatively detected to intuitively monitor the scaling degree of the heat exchange tube, which is helpful for the operating personnel to operate and maintain the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A flow chart of a method for detecting the scaling thickness of a heat exchange tube provided in an embodiment of the present invention;

[0042] Figure 2 is a flow chart of another method for detecting the scaling thickness of a heat exchange tube provided by an embodiment of the present invention;

[0043] Figure 3 is a flow chart of another method for detecting the scaling thickness of a heat exchange tube provided by an embodiment of the present invention;

[0044] Figure 4 It is a structural schematic diagram of a heat exchange tube scaling thickness detection device provided by an embodiment of the present invention;

[0045] Figure 5 It is a structural schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] In the related art, low-temperature multi-effect distillation desalination technology refers to a desalination technology in which the evaporation temperature of seawater is lower than 70°C under vacuum conditions. It is characterized by connecting a series of horizontal tube spray falling film evaporators in series. Through multiple evaporations and condensations, the evaporation temperature of the latter effect is lower than that of the previous effect, thereby obtaining a desalination process of distilled water with multiple times the amount of steam. Compared with the multi-stage flash distillation desalination technology, the operating temperature is lower, which to a certain extent slows down the tendency of scaling, but scaling cannot be completely avoided. Since the thermal conductivity of the scale is very small, it seriously affects the heat exchange efficiency and heat exchange performance of the evaporator heat exchange tube of the low-temperature multi-effect distillation desalination device, and greatly reduces the water production ratio. Therefore, it is necessary to detect the scaling thickness of the heat exchange tube to monitor the state of the heat exchange tube to avoid a reduction in the operating efficiency of the seawater desalination system.

[0049] Figure 1 A flow chart of a method for detecting the scaling thickness of a heat exchange tube provided in an embodiment of the present invention. The embodiment of the present invention can be applied to the quantitative detection of scaling thickness when scaling occurs in a heat exchange tube in a seawater desalination system. The method can be performed by a heat exchange tube scaling thickness detection device, which can be implemented in the form of hardware and / or software.

[0050] like Figure 1 As shown, the method for detecting the scaling thickness of a heat exchange tube provided in an embodiment of the present invention includes:

[0051] S101, obtaining a first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at an initial moment, the water production ratio of the seawater desalination system at an initial moment, the water production ratio of the seawater desalination system at a current moment, and the temperature difference between the condensate water temperature and the brine at a current moment.

[0052] The initial time is the time when the seawater desalination system equipment is initially put into operation or the time when the seawater desalination system is first put into operation after chemical cleaning of the heat exchange tubes, and the current time is the time when the heat exchange tube scaling thickness is detected after scaling of the heat exchange tubes.

[0053] Specifically, the first total thermal resistance of the heat exchange tube represents the total resistance encountered when heat is exchanged between steam and seawater through the heat exchange tube wall and the scaling layer. The larger the first total thermal resistance, the greater the resistance in the heat transfer process and the lower the heat transfer efficiency; the smaller the first total thermal resistance, the higher the heat transfer efficiency. When scaling occurs in the heat exchange tube, the thermal resistance of the heat exchange tube will increase due to the extremely low thermal conductivity of the scaling layer. Therefore, the scaling thickness of the heat exchange tube is detected based on the size of the first total thermal resistance of the heat exchange tube.

[0054] Since the initial time is the time when the desalination system equipment is initially put into operation or the time when the desalination system is first put into operation after the chemical cleaning of the heat exchange tube, the heat exchange tube has no scaling at the initial time. The current time is the time when the heat exchange tube scaling thickness detection is performed after the heat exchange tube is scaled, that is, the heat exchange tube has scaled at the current time, and the scaling thickness detection needs to be performed.

[0055] The heat transfer rate of a heat exchange tube is a parameter that measures the heat transfer performance of the heat exchange tube. The stronger the heat transfer performance of the heat exchange tube, the greater the heat transfer rate of the heat exchange tube.

[0056] The water production ratio is a parameter that measures how much pure water is produced per ton of steam. Optionally, the water production ratio is calculated by subtracting the amount of steam input from the amount of pure water and condensate produced by seawater desalination, and then dividing it by the amount of steam. At the same time, the water production ratio is also related to the heat transfer performance of the heat exchange tube. The stronger the heat transfer performance of the heat exchange tube, the higher the water production ratio.

[0057] The higher the water production ratio, the more pure water is produced per ton of steam; and the weaker the heat transfer performance of the heat exchange tube, the lower the water production ratio, that is, the less pure water is produced per ton of steam. The water production ratio at the initial moment is used as a parameter to measure the heat transfer performance of the heat exchange tube when it is not scaled, while the water production ratio at the current moment can be used as a parameter to measure the heat transfer performance of the heat exchange tube when the heat exchange tube is currently scaled. The thicker the scale thickness of the heat exchange tube, the weaker the heat transfer performance of the heat exchange tube, and the water production ratio will be reduced accordingly.

[0058] The current condensate temperature and brine temperature difference is the difference between the condensate temperature and brine temperature of the seawater desalination system after the heat exchange tube is scaled. When the heat exchange tube is scaled, the thermal conductivity of the scale layer is very small, which affects the heat exchange efficiency and heat exchange performance of the heat exchange tube, thereby reducing the difference between the condensate temperature and the brine temperature.

[0059] The first total thermal resistance of the heat exchange tube can be obtained through the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment, and the temperature difference between the condensate water temperature and the brine at the current moment.

[0060] S102, obtaining a second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube.

[0061] The second total thermal resistance of the heat exchange tube represents the total resistance encountered when heat is exchanged between steam and seawater through the heat exchange tube wall. When the heat exchange tube is scaled, the structures that affect the heat exchange performance of the heat exchange tube along the heat exchange direction of the heat exchange tube include the heat exchange tube and the scale layer of the heat exchange tube. Therefore, the second total thermal resistance of the heat exchange tube is obtained based on the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the heat exchange tube wall, the thermal resistance of the scale layer of the heat exchange tube, and the thermal resistance of the convective heat transfer on the outer surface of the scale layer of the heat exchange tube.

[0062] Optionally, the sum of the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the heat exchange tube wall, the thermal resistance of the scale layer of the heat exchange tube and the convective heat transfer resistance of the outer surface of the scale layer of the heat exchange tube is the second total thermal resistance of the heat exchange tube.

[0063] S103, establishing an equal relationship based on the equality of the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube, and calculating the thickness of the scaling layer of the heat exchange tube according to the equal relationship.

[0064] The first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube are total thermal resistances calculated by two different calculation methods with different parameters, and the first total thermal resistance and the second total thermal resistance are equal in value. Based on the equality of the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube, an equal relationship is established, and mathematical calculations such as term transfer are performed according to the equal relationship, and finally the scaling layer thickness of the heat exchange tube is obtained.

[0065] Optionally, after the scaling layer thickness of the heat exchange tube is obtained according to the equivalent relationship, the cleaning cycle of the heat exchange tube is set by monitoring the scaling layer thickness. Exemplarily, when the scaling layer thickness is greater than a preset threshold, it is determined that the heat exchange tube needs to be cleaned.

[0066] The embodiment of the present invention provides a method for detecting the scaling thickness of a heat exchange tube, which calculates the total thermal resistance of the heat exchange tube by two different calculation methods and different parameters, that is, obtains the first total thermal resistance and the second total thermal resistance. The scaling layer thickness of the heat exchange tube is obtained according to the equal relationship between the first total thermal resistance and the second total thermal resistance. The scaling thickness of the heat exchange tube can be quantitatively detected to intuitively monitor the scaling degree of the heat exchange tube, which is helpful for the operating personnel to operate and maintain the heat exchange tube.

[0067] Based on the above embodiments, Figure 2 is a flow chart of another heat exchange tube scaling thickness detection method provided by an embodiment of the present invention, such as Figure 2 As shown, the heat exchange tube scaling thickness detection method includes:

[0068] S201. Obtain the heat transfer rate of the heat exchange tube at the initial moment based on the temperature difference between the condensate water and the brine, the heat transfer resistance of the inner surface of the heat exchange tube, the convection heat transfer resistance of the outer surface of the heat exchange tube, and the conduction heat resistance of the heat exchange tube wall.

[0069] Specifically, at the initial moment, the heat exchange tube has not yet been scaled, and the heat transfer rate of the heat exchange tube at the initial moment is calculated by the temperature difference between the condensate water temperature and the brine temperature, the heat transfer resistance of the inner surface of the heat exchange tube, the convection heat transfer resistance of the outer surface of the heat exchange tube, and the conduction thermal resistance of the heat exchange tube wall.

[0070] The initial temperature difference between the condensate water temperature and the brine temperature is the difference between the condensate water temperature generated in the seawater desalination system and the input brine temperature when the heat exchange tubes have not yet scaled. The heat exchange tubes participate in the heat exchange between the condensate water and the brine. The greater the temperature difference between the condensate water temperature and the brine temperature, the more heat the heat exchange tubes transfer; conversely, the smaller the temperature difference between the condensate water temperature and the brine temperature, the less heat the heat exchange tubes transfer.

[0071] The heat transfer resistance of the inner surface of the heat exchange tube, the convection heat transfer resistance of the outer surface of the heat exchange tube and the conduction thermal resistance of the heat exchange tube wall are the thermal properties of the heat exchange tube itself. When the heat exchange tube has not yet been scaled at the initial moment, the heat transfer rate of the heat exchange tube at the initial moment can be obtained by considering the thermal properties of the heat exchange tube.

[0072] For example, the expression of the heat transfer rate of the heat exchange tube at the initial moment is:

[0073] Q0 = T0 / (R1 + R2 + R3);

[0074] Among them, Q0 is the heat transfer rate of the heat exchange tube at the initial moment, T0 is the temperature difference between the condensate water temperature and the brine temperature at the initial moment, R1 is the heat transfer resistance of the inner surface of the heat exchange tube, R2 is the convection heat transfer resistance of the outer surface of the heat exchange tube, and R3 is the conduction resistance of the heat exchange tube wall.

[0075] The difference between the condensate temperature and the brine temperature at the initial moment = the initial condensate temperature - the initial first-effect brine temperature. Optionally, the difference between the condensate temperature and the brine temperature at the initial moment is a configurable parameter, which is manually set when the equipment of the seawater desalination system is initially put into operation.

[0076] The expression of the heat transfer resistance of the inner surface of the heat exchange tube is: R1=1 / (K1×3.14×D2×L); where R1 is the heat transfer resistance of the inner surface of the heat exchange tube, K1 is the steam convection heat transfer coefficient in the heat exchange tube, D2 is the inner diameter of the heat exchange tube, and L is the length of the heat exchange tube.

[0077] The expression of the convective heat transfer resistance on the outer surface of the heat exchange tube is: R2=1 / (K2×3.14×D1×L); where R2 is the convective heat transfer resistance on the outer surface of the heat exchange tube, K2 is the convective heat transfer coefficient of seawater, D1 is the outer diameter of the heat exchange tube, and L is the length of the heat exchange tube.

[0078] The expression of the conduction thermal resistance of the heat exchange tube wall is: R3=ln(D1 / D2) / (2×3.14×λ2×L); where R3 is the conduction thermal resistance of the heat exchange tube wall, D1 is the outer diameter of the heat exchange tube, D2 is the inner diameter of the heat exchange tube, λ2 is the thermal conductivity of the heat exchange tube, and L is the length of the heat exchange tube.

[0079] S202, obtaining a water production ratio of the seawater desalination system at the initial moment according to the flow rate of distilled water at the initial moment, the flow rate of condensed water at the initial moment, and the flow rate of input steam at the initial moment.

[0080] The water production ratio of the seawater desalination system is a parameter that measures how many tons of water are produced per ton of steam in the seawater desalination system. The water production ratio of the seawater desalination system at the initial moment is obtained, that is, the water production ratio of the heat exchange tubes in the seawater desalination system before scaling. Exemplarily, the water production ratio at the initial moment = (distilled water flow + condensed water flow - input steam flow) / input steam flow.

[0081] S203, obtaining the water production ratio of the seawater desalination system at the current moment according to the flow rate of distilled water at the current moment, the flow rate of condensed water at the current moment, and the flow rate of input steam at the current moment.

[0082] After the desalination system has been running for a period of time, the heat exchange tubes of the desalination system will be scaled. The water production ratio of the desalination system at the current moment is obtained according to the flow rate of distilled water, the flow rate of condensed water and the flow rate of steam input at the current moment of the heat exchange tube. That is, the water production ratio of the desalination system after the heat exchange tube is scaled is calculated.

[0083] When the heat exchange tube is scaled, the heat exchange efficiency between seawater and steam is reduced, and the amount of distilled water produced per ton of steam is also reduced, which will cause a decrease in the water production ratio of the seawater desalination system. Therefore, the water production ratio of the seawater desalination system at the current moment is obtained to quantify the scaling thickness of the heat exchange tube.

[0084] S204. Obtain the temperature difference between the condensate water temperature and the brine temperature at the current moment according to the condensate water temperature at the current moment and the first-effect brine temperature at the current moment.

[0085] In the desalination system, when condensate and salt water exchange heat in the system, heat transfer occurs due to the temperature difference between them. The condensate will transfer its heat energy to the salt water, causing the temperature of the salt water to rise; at the same time, the temperature of the condensate will drop accordingly.

[0086] The heat exchange efficiency of the heat exchange tube in the seawater desalination system will affect the temperature difference between the condensate water and the brine. The higher the heat exchange efficiency of the heat exchange tube, the stronger the water production capacity of the system, and the greater the temperature difference between the condensate water and the brine. Therefore, the scaling thickness of the heat exchange tube is quantified based on the parameters of the temperature difference between the condensate water and the brine at the current moment.

[0087] Exemplarily, the difference between the condensate temperature at the current moment and the brine temperature is calculated as follows: the condensate temperature at the initial moment minus the first-effect brine temperature at the initial moment.

[0088] S205, obtaining a first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment, and the temperature difference between the condensate water temperature and the brine at the current moment.

[0089] Exemplarily, the first total thermal resistance of the heat exchange tube is expressed as: RS1 =T1×C0 / (Q0×C1).

[0090] Among them, R S1 is the first total thermal resistance of the heat exchange tube, T1 is the temperature difference between the condensate water and the brine at the current moment, C0 is the water production ratio at the initial moment, Q0 is the expression of the heat transfer rate of the heat exchange tube at the initial moment, and C1 is the water production ratio at the current moment.

[0091] S206. Obtain a second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube.

[0092] S207, establishing an equal relationship based on the equality of the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube, and calculating the scaling layer thickness of the heat exchange tube according to the equal relationship.

[0093] Based on the above embodiments, Figure 3 is a flow chart of another heat exchange tube scaling thickness detection method provided by an embodiment of the present invention, such as Figure 3 As shown, the heat exchange tube scaling thickness detection method includes:

[0094] S301, obtaining a first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at an initial moment, the water production ratio of the seawater desalination system at an initial moment, the water production ratio of the seawater desalination system at a current moment, and the temperature difference between the condensate water temperature and the brine at a current moment.

[0095] Exemplarily, the first total thermal resistance of the heat exchange tube is expressed as: R S1 =T1×C0 / (Q0×C1).

[0096] Among them, R S1 is the first total thermal resistance of the heat exchange tube, T1 is the temperature difference between the condensate water and the brine at the current moment, C0 is the water production ratio at the initial moment, Q0 is the expression of the heat transfer rate of the heat exchange tube at the initial moment, and C1 is the water production ratio at the current moment.

[0097] S302, obtaining the heat transfer resistance of the inner surface of the heat exchange tube according to the convection heat transfer coefficient of the steam in the heat exchange tube, the inner diameter of the heat exchange tube, and the length of the heat exchange tube.

[0098] Specifically, the heat transfer resistance of the inner surface of the heat exchange tube reflects the resistance to heat transfer on the inner surface of the heat exchange tube. The convective heat transfer coefficient of the steam in the heat exchange tube reflects the ability of the steam to exchange heat with the tube wall when flowing in the heat exchange tube. The larger the convective heat transfer coefficient of the steam in the heat exchange tube, the more efficient the heat exchange between the steam and the tube wall in the heat exchange tube. The inner diameter of the heat exchange tube determines the flow state of the steam in the heat exchange tube and the surface area of ​​heat transfer. The length of the heat exchange tube determines the distance the steam flows in the heat exchange tube and the time of heat transfer. The heat transfer resistance of the inner surface of the heat exchange tube is obtained based on the convective heat transfer coefficient of the steam in the heat exchange tube, the inner diameter of the heat exchange tube, and the length of the heat exchange tube.

[0099] Exemplarily, the expression of the heat transfer resistance of the inner surface of the heat exchange tube is: R1=1 / (K1×3.14×D2×L); wherein R1 is the heat transfer resistance of the inner surface of the heat exchange tube, K1 is the steam convection heat transfer coefficient in the heat exchange tube, D2 is the inner diameter of the heat exchange tube, and L is the length of the heat exchange tube.

[0100] S303, obtaining the conduction thermal resistance of the wall of the heat exchange tube according to the outer diameter of the heat exchange tube, the inner diameter of the heat exchange tube, the thermal conductivity of the heat exchange tube, and the length of the heat exchange tube.

[0101] Specifically, the conduction thermal resistance of the heat exchange tube wall reflects the resistance of the heat transfer of the heat exchange tube wall. The thermal conductivity of the heat exchange tube determines the speed of heat transfer in the material of the heat exchange tube. The conduction thermal resistance of the heat exchange tube wall can be obtained based on the thermal conductivity of the heat exchange tube and the outer diameter of the heat exchange tube, the inner diameter of the heat exchange tube and the length of the heat exchange tube.

[0102] Exemplarily, the expression of the conduction thermal resistance of the heat exchange tube wall is: R3=ln(D1 / D2) / (2×3.14×λ2×L); wherein R3 is the conduction thermal resistance of the heat exchange tube wall, D1 is the outer diameter of the heat exchange tube, D2 is the inner diameter of the heat exchange tube, λ2 is the thermal conductivity of the heat exchange tube, and L is the length of the heat exchange tube.

[0103] Optionally, the heat exchange tube material includes: titanium alloy. When the heat exchange tube material is titanium alloy, the heat conductivity of the heat exchange tube is 22W / (m·K).

[0104] S304, obtaining the thermal resistance of the scale layer of the heat exchange tube according to the thickness of the scale layer of the heat exchange tube, the outer diameter of the heat exchange tube, the thermal conductivity of the scale of the heat exchange tube and the length of the heat exchange tube.

[0105] Specifically, the thermal conductivity of the heat exchange tube scale reflects the thermal conductivity of the scale. The outer diameter and length of the heat exchange tube determine the contact area between the heat exchange tube scale and the heat exchange tube. The thickness of the scale layer of the heat exchange tube, the outer diameter of the heat exchange tube, the thermal conductivity of the scale of the heat exchange tube and the length of the heat exchange tube can obtain the thermal resistance of the scale layer of the heat exchange tube, and the thermal resistance of the scale layer of the heat exchange tube can reflect the resistance of heat transfer of the scale of the heat exchange tube.

[0106] Exemplarily, the expression of the thermal resistance of the scale layer of the heat exchange tube is: R4=ln((2×H+D1) / D1) / (2×3.14×λ1×L). Wherein, R4 is the thermal resistance of the scale layer of the heat exchange tube, H is the thickness of the scale layer of the heat exchange tube, D1 is the outer diameter of the heat exchange tube, λ1 is the thermal conductivity of the scale of the heat exchange tube, and L is the length of the heat exchange tube.

[0107] Optionally, the scaling component of the heat exchange tube includes: calcium carbonate; when the scaling component is calcium carbonate, the thermal conductivity coefficient of the scaling of the heat exchange tube is 0.5 W / (m·K).

[0108] S305, obtaining the thermal resistance of the convective heat transfer on the outer surface of the scale layer of the heat exchange tube according to the convective heat transfer coefficient of seawater, the outer diameter of the heat exchange tube, the thickness of the scale layer of the heat exchange tube, and the length of the heat exchange tube.

[0109] Specifically, the convective heat transfer coefficient of seawater determines the heat transfer rate between seawater and the surface of the heat exchange tube. The thickness of the scale layer of the heat exchange tube will affect the thermal resistance of the outer surface of the heat exchange tube. As the thickness of the scale layer increases, the resistance to heat transfer of the heat exchange tube will also increase, resulting in a decrease in the heat transfer efficiency of the heat exchange tube. The thermal resistance of the convective heat transfer on the outer surface of the scale layer of the heat exchange tube reflects the heat transfer thermal resistance between the scale layer of the heat exchange tube and the seawater.

[0110] For example, the thermal resistance of the surface heat transfer of the scale layer on the heat exchange tube is expressed as:

[0111] R5 = 1 / (K2 × 3.14 × (D1 + 2 × H) × L). Among them, R5 is the convective heat transfer resistance of the outer surface of the heat exchange tube scale layer, K2 is the convective heat transfer coefficient of seawater, D1 is the outer diameter of the heat exchange tube, H is the thickness of the scale layer on the heat exchange tube, and L is the length of the heat exchange tube.

[0112] S306, obtaining a second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube.

[0113] Exemplarily, the expression of the second total thermal resistance of the heat exchange tube is: R S2 =R1+R3+R4+R5.

[0114] Among them, R S2 is the second total thermal resistance, R1 is the heat transfer resistance of the inner surface of the heat exchange tube, R3 is the heat conduction resistance of the heat exchange tube wall, R4 is the heat resistance of the scale layer of the heat exchange tube, and R5 is the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube.

[0115] S307, establishing an equal relationship based on the equality of the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube, and calculating the thickness of the scaling layer of the heat exchange tube according to the equal relationship.

[0116] Specifically, the expression of the first total thermal resistance of the heat exchange tube is: R S1=T1×C0 / (Q0×C1); The expression of the second total thermal resistance of the heat exchange tube is: R S2 =R1+R3+R4+R5.

[0117] Based on the fact that the first total thermal resistance of the heat exchange tube is equal to the second total thermal resistance of the heat exchange tube, an equivalent relationship is established: R S1 =T1×C0 / (Q0×C1)=R1+R3+R4+R5=R S2 .

[0118] Optionally, the thermal resistance of convective heat transfer on the outer surface of the heat exchange tube scale layer is 10% of the thermal resistance of the heat exchange tube scale layer, that is, R5=0.1R4.

[0119] The expression for the thickness of the scaling layer of the heat exchange tube is:

[0120] H=(EXP((2×3.14×λ1×L)×(T1×C0 / (Q0×C1)-1 / (K1×3.14×D2×L)-ln

[0121] (D1 / D2) / (2×3.14×λ2×L)) / 1.1)-D1) / 2.

[0122] Among them, H is the scaling layer thickness of the heat exchange tube, λ1 is the thermal conductivity of scaling of the heat exchange tube, L is the length of the heat exchange tube, T1 is the temperature difference between the condensate water temperature and the brine temperature at the current moment, C0 is the water production ratio of the seawater desalination system at the initial moment, Q0 is the heat transfer rate of the heat exchange tube at the initial moment, C1 is the water production ratio of the seawater desalination system at the current moment, K1 is the convective heat transfer coefficient of the steam in the heat exchange tube, D2 is the inner diameter of the heat exchange tube, L is the length of the heat exchange tube, D1 is the outer diameter of the heat exchange tube, D2 is the inner diameter of the heat exchange tube, and λ2 is the thermal conductivity of the heat exchange tube.

[0123] Figure 4 is a schematic diagram of the structure of a heat exchange tube scaling thickness detection device provided by an embodiment of the present invention, such as Figure 4 As shown, the device comprises:

[0124] The first total thermal resistance acquisition module 401 of the heat exchange tube is used to acquire the first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment, and the temperature difference between the condensate water temperature and the brine at the current moment;

[0125] The second total thermal resistance acquisition module 402 of the heat exchange tube is used to acquire the second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the thermal resistance of the convective heat transfer of the outer surface of the scale layer of the heat exchange tube;

[0126] The equivalent relationship establishment and solving module 403 is used to establish an equivalent relationship based on the equality of the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube, and obtain the scaling layer thickness of the heat exchange tube according to the equivalent relationship.

[0127] The heat exchange tube scaling thickness detection device provided in the embodiment of the present invention can execute the heat exchange tube scaling thickness detection method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0128] Figure 5 : is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. The electronic device provided by the embodiment of the present invention is used to implement the heat exchange tube scaling thickness detection method of the above-mentioned embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0129] like Figure 5 As shown, the electronic device includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0130] A number of components in the electronic device are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0131] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a heat exchange tube scaling thickness detection method.

[0132] In some embodiments, the heat exchange tube scaling thickness detection method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the heat exchange tube scaling thickness detection method described above can be performed. Optionally, in other embodiments, the processor 11 can be configured to execute the heat exchange tube scaling thickness detection method in any other appropriate manner (for example, by means of firmware).

[0133] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0134] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0135] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Optionally, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0136] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0137] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0138] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0139] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0140] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting the scaling thickness of a heat exchange tube, wherein the heat exchange tube is an evaporator heat exchange tube of a seawater desalination system, characterized in that: The method comprises: The first total thermal resistance of the heat exchange tube is obtained according to the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment, and the temperature difference between the condensate temperature and the brine at the current moment; wherein the initial moment is the moment when the seawater desalination system equipment is initially put into operation or the moment when the seawater desalination system is first put into operation after the heat exchange tube is chemically cleaned, and the current moment is the moment when the scale thickness of the heat exchange tube is detected after the heat exchange tube is scaled; Obtaining a second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube; An equivalence relationship is established based on that the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube are equal, and the thickness of the scaling layer of the heat exchange tube is calculated according to the equivalence relationship.

2. The method for detecting the scaling thickness of heat exchange tubes according to claim 1, characterized in that: Before obtaining the first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at the initial moment, the water production ratio of the seawater desalination system at the initial moment, the water production ratio of the seawater desalination system at the current moment, and the temperature difference between the condensate water temperature and the brine at the current moment, the method further includes: The heat transfer rate of the heat exchange tube at the initial moment is obtained according to the temperature difference between the condensate water and the brine at the initial moment, the heat transfer resistance of the inner surface of the heat exchange tube, the convection heat transfer resistance of the outer surface of the heat exchange tube, and the conduction heat resistance of the heat exchange tube wall; Obtaining the water production ratio of the seawater desalination system at the initial moment according to the flow rate of distilled water at the initial moment, the flow rate of condensed water at the initial moment, and the flow rate of input steam at the initial moment; Obtaining the water production ratio of the seawater desalination system at the current moment according to the flow rate of distilled water at the current moment, the flow rate of condensed water at the current moment, and the flow rate of input steam at the current moment; The temperature difference between the condensate water temperature and the brine temperature at the current moment is obtained according to the temperature of the condensate water at the current moment and the temperature of the first-effect brine at the current moment.

3. The method for detecting the scaling thickness of heat exchange tubes according to claim 2, characterized in that: The first total thermal resistance of the heat exchange tube is: R S1 =T1×C0 / (Q0×C1); Among them, R S1 is the first total thermal resistance of the heat exchange tube, T1 is the temperature difference between the condensate water and the brine at the current moment, C0 is the water production ratio of the seawater desalination system at the initial moment, Q0 is the heat transfer rate of the heat exchange tube at the initial moment, and C1 is the water production ratio of the seawater desalination system at the current moment.

4. The method for detecting the scaling thickness of heat exchange tubes according to claim 1, characterized in that: Before obtaining the second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube and the thermal resistance of the convective heat transfer of the scale layer of the heat exchange tube, the method further includes: Obtaining the heat transfer resistance of the inner surface of the heat exchange tube according to the convection heat transfer coefficient of the steam in the heat exchange tube, the inner diameter of the heat exchange tube, and the length of the heat exchange tube; Obtaining the conduction thermal resistance of the wall of the heat exchange tube according to the outer diameter of the heat exchange tube, the inner diameter of the heat exchange tube, the thermal conductivity of the heat exchange tube and the length of the heat exchange tube; Obtaining the thermal resistance of the scale layer on the heat exchange tube according to the thickness of the scale layer on the heat exchange tube, the outer diameter of the heat exchange tube, the thermal conductivity of the scale on the heat exchange tube and the length of the heat exchange tube; The thermal resistance of the convective heat transfer on the outer surface of the scale layer of the heat exchange tube is obtained according to the convective heat transfer coefficient of seawater, the outer diameter of the heat exchange tube, the thickness of the scale layer of the heat exchange tube, and the length of the heat exchange tube.

5. The method for detecting the scaling thickness of heat exchange tubes according to claim 4, characterized in that: The second total thermal resistance of the heat exchange tube is: R S2 =R1+R3+R4+R5; Among them, R S2 is the second total thermal resistance of the heat exchange tube, R1 is the heat transfer resistance of the inner surface of the heat exchange tube, R3 is the conduction resistance of the heat exchange tube wall, R4 is the thermal resistance of the scale layer of the heat exchange tube, and R5 is the convection heat transfer resistance of the outer surface of the scale layer of the heat exchange tube.

6. The method for detecting the scaling thickness of heat exchange tubes according to claim 1, characterized in that: The thermal resistance of convective heat transfer on the outer surface of the heat exchange tube scale layer is 10% of the thermal resistance of the heat exchange tube scale layer.

7. The method for detecting the scaling thickness of heat exchange tubes according to claim 6, characterized in that: The thickness of the scaling layer of the heat exchange tube is: H=(EXP((2×3.14×λ1×L)×(T1×C0 / (Q0×C1)-1 / (K1×3.14×D2×L)-ln (D1 / D2) / (2×3.14×λ2×L)) / 1.1)-D1) / 2; Among them, H is the scaling layer thickness of the heat exchange tube, λ1 is the thermal conductivity of scaling of the heat exchange tube, L is the length of the heat exchange tube, T1 is the temperature difference between the condensate water temperature and the brine temperature at the current moment, C0 is the water production ratio of the seawater desalination system at the initial moment, Q0 is the heat transfer rate of the heat exchange tube at the initial moment, C1 is the water production ratio of the seawater desalination system at the current moment, K1 is the convective heat transfer coefficient of the steam in the heat exchange tube, D2 is the inner diameter of the heat exchange tube, L is the length of the heat exchange tube, D1 is the outer diameter of the heat exchange tube, D2 is the inner diameter of the heat exchange tube, and λ2 is the thermal conductivity of the heat exchange tube.

8. A heat exchange tube scaling thickness detection device, applied to the heat exchange tube scaling thickness detection method according to any one of claims 1 to 7, characterized in that: The device comprises: A first total thermal resistance acquisition module for the heat exchange tube, used to acquire the first total thermal resistance of the heat exchange tube according to the heat transfer rate of the heat exchange tube at an initial moment, the water production ratio of the seawater desalination system at an initial moment, the water production ratio of the seawater desalination system at a current moment, and the temperature difference between the condensate water temperature and the brine at a current moment; A second total thermal resistance acquisition module for the heat exchange tube, used to acquire the second total thermal resistance of the heat exchange tube according to the heat transfer resistance of the inner surface of the heat exchange tube, the conduction resistance of the wall of the heat exchange tube, the thermal resistance of the scale layer of the heat exchange tube, and the thermal resistance of the convective heat transfer on the outer surface of the scale layer of the heat exchange tube; The equivalent relationship establishment and solving module is used to establish an equivalent relationship based on the equality of the first total thermal resistance of the heat exchange tube and the second total thermal resistance of the heat exchange tube, and obtain the scaling layer thickness of the heat exchange tube according to the equivalent relationship.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the heat exchange tube scaling thickness detection method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the heat exchange tube scaling thickness detection method according to any one of claims 1 to 7 when executed.

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