A fracturing fluid tank and its circulating heating system

Abstract

The present invention relates to the field of fracturing fluid tanks, and is used to solve the problem that fracturing fluid tanks consume a lot of energy when heated for a long time, which increases production costs and is not conducive to energy conservation and emission reduction. The present invention specifically relates to a fracturing fluid tank and a circulating heating system thereof. In the present invention, the fracturing fluid is heated by a heating pipe at the bottom, so that the temperature of the fracturing fluid at the bottom is higher than that of the fracturing fluid at the top, and the temperature loss of the fracturing fluid at the top is reduced. At the same time, the liquid circulation inside the tank body is ensured, and the temperature difference in the fracturing fluid tank is controlled within a certain range. A comprehensive analysis is performed based on the heat dissipation capacity of the environment, the heating capacity of the heating fins, and the required release temperature and flow rate of the pressure fluid, so as to intelligently control the preheating temperature in the pressure fluid tank. When release is required, the temperature can be quickly raised to the required temperature by the heating fins, so that the fracturing fluid can be kept at the preheating temperature to avoid freezing, and the heat loss of the fracturing fluid when the temperature is maintained for a long time can be reduced, thereby reducing energy consumption.

Description

Technical Field

[0001] The invention relates to the field of fracturing fluid tanks, in particular to a fracturing fluid tank and a circulating heating system thereof. Background Art

[0002] After the oil well production reaches a certain stage, the production capacity and permeability decrease. In order to enhance the oil drainage capacity and increase the oil well production, people invented the fracturing technology. Fracturing methods are divided into two categories: hydraulic fracturing and high-energy gas fracturing. Hydraulic fracturing relies on the ground high-pressure pump truck group to inject fluid into the well at high speed, and uses the high pressure built up at the bottom of the well to break the oil layer rock and produce cracks. Fracturing fluid is an indispensable working fluid in the hydraulic fracturing process. Fracturing fluid tanks are often placed in oil fields to store fracturing fluid. Existing fracturing fluid tanks often do not have a heating function. Under extremely cold conditions in winter, the fracturing fluid becomes thicker and the rheology becomes worse, which can easily cause problems such as ice in the fracturing fluid tank and freezing of ground pipelines and equipment, leading to serious accidents;

[0003] The patent application number CN215157630U discloses a fracturing fluid tank and a fracturing fluid circulation heating system. The problem that the fluidity of the fracturing fluid tank deteriorates under extremely cold conditions, which affects the use of the fracturing fluid, is solved by setting a heating component. However, the fracturing fluid is kept in a high temperature state as a whole by continuous and uniform heating, resulting in a large amount of heat exchange between the fracturing fluid tank and the external environment. Therefore, when the heating state is maintained for a long time and the scale of the fracturing fluid tank is large, there is a serious problem of energy consumption, which increases production costs and is not conducive to energy conservation and emission reduction.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] In the present invention, the fracturing fluid is heated by the heating tube at the bottom, so that the temperature of the fracturing fluid at the bottom is higher than that of the fracturing fluid at the top, and the temperature loss of the fracturing fluid at the top is reduced, while the liquid circulation inside the tank body is ensured, and the temperature difference in the fracturing fluid tank is controlled within a certain range. A comprehensive analysis is performed based on the heat dissipation capacity of the environment, the heating capacity of the heating fins, and the release temperature and flow rate required by the pressure liquid, so as to intelligently regulate the preheating temperature in the pressure liquid tank. When release is required, the temperature can be quickly raised to the required temperature through the heating fins, so that the fracturing fluid can be maintained at the preheating temperature to avoid freezing, and the heat loss of the fracturing fluid when the temperature is maintained for a long time can be reduced, thereby reducing energy consumption, solving the problem that the fracturing fluid tank consumes a lot of energy when heated for a long time, increases production costs, and is not conducive to energy conservation and emission reduction, and proposes a fracturing fluid tank and a circulating heating system thereof.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A fracturing liquid tank comprises a tank body, wherein sealing covers are installed at both ends of the tank body, a heating tube is fixedly installed on the sealing cover on one side, a heating fin is fixedly installed inside the heating tube, wires are installed on both sides of the heating fins, the two sides of the wires pass through the liquid outlet pipe, the exposed part of the wires and the outside of the heating tube are connected with a terminal, the terminal is used to connect with an external power supply, a flange is fixedly installed at one end of the liquid outlet pipe away from the sealing cover, and the flange is connected with a fracturing operation pipeline, the heating fin is in a circular ring shape on the outside and a plate-like structure distributed circumferentially on the inside, and a high vacuum insulation chamber is formed between the circular ring structure of the heating fin and the liquid outlet pipe;

[0008] A liquid inlet pipe is installed inside the sealing cover, the top of the liquid inlet pipe is connected to the circular ring structure of the heating fin, the bottom of the liquid inlet pipe is close to the bottom of the tank body, and an arc-shaped heating pipe is arranged at the bottom of the tank body in an S shape near the bottom of the tank body.

[0009] A fracturing fluid tank circulation heating system, comprising a release management unit, an environment calculation unit, a preheating management unit and a temperature control unit, wherein the release management unit acquires a standard flow rate and an operating temperature of the fracturing fluid, wherein the standard flow rate is the flow rate of the fracturing fluid supply speed required for production when passing through a heating fin, and the operating temperature is the temperature of the fracturing fluid when it is released from the heating fin;

[0010] The environment calculation unit analyzes and calculates the environment heat dissipation capacity to generate a heat dissipation compliance signal or a heat dissipation energy consumption signal;

[0011] The temperature control unit collects the temperature of the outlet end of the fracturing fluid, compares the collected temperature with a preset temperature, and performs early warning and automatic correction control according to the comparison result;

[0012] The preheating management unit judges and analyzes the preheating temperature in the tank body according to the collected release speed and operating temperature, and adjusts the operating temperature of the heating tube and the heating fin.

[0013] As a preferred embodiment of the present invention, the environmental heat dissipation capacity collected by the environmental calculation unit includes the environmental temperature, the environmental wind speed and the surface humidity of the tank. The environmental calculation unit records the environmental temperature, the environmental wind speed and the surface humidity of the tank, and generates the environmental heat dissipation capacity through formula analysis. The environmental calculation unit compares the environmental heat dissipation capacity with the preset heat dissipation threshold. If the environmental heat dissipation capacity is less than the preset heat dissipation threshold, a heat dissipation compliance signal is generated. If the environmental heat dissipation capacity is greater than or equal to the preset heat dissipation threshold, a heat dissipation energy consumption signal is generated.

[0014] As a preferred embodiment of the present invention, the release management unit obtains a standard flow rate and an operating temperature, and the release management unit sends the standard flow rate to the preheating management unit. After obtaining the standard flow rate, the preheating management unit substitutes the standard flow rate, the operating temperature and the heat exchange efficiency of the heating fins into the cloud-based heating model. The cloud-based heating model calculates the temperature rise amplitude of the fracturing fluid when passing through the heating fins through the standard flow rate and the heat exchange efficiency of the heating fins, and records the difference between the operating temperature and the temperature rise amplitude as the minimum preheating temperature. The preheating management unit compares the minimum preheating temperature with the current preheating temperature maintained by the current heating tube. If the current preheating temperature is less than or equal to the minimum preheating temperature, a preheating temperature increase signal is generated. If the current preheating temperature is greater than the minimum preheating temperature, a preheating temperature sufficient signal is generated. The preheating management unit controls the operating power increase of the heating tube through the preheating temperature increase signal.

[0015] As a preferred embodiment of the present invention, after the preheating management unit obtains the preheating temperature sufficient signal, if the environment calculation unit generates a heat dissipation energy consumption signal at the same time, it generates a preheating temperature reduction signal; if the environment calculation unit generates a heat dissipation standard signal at the same time, it generates a fin cooling signal;

[0016] After generating the fin cooling signal, the preheating management unit obtains the current preheating temperature and operating temperature, and substitutes the current preheating temperature, operating temperature and standard flow rate into the cloud heating model. The cloud heating model calculates the required temperature rise for the heating fins through the preheating temperature and operating temperature, and calculates the required surface temperature for the heating fins through the required temperature rise for the heating fins, the standard flow rate and the heat exchange efficiency of the heating fins. The required surface temperature of the heating fins is used to control the heating fins to drop from the maximum temperature to the required surface temperature of the heating fins.

[0017] As a preferred embodiment of the present invention, the temperature control unit records the collected temperature at the outlet of the fracturing fluid as the actual temperature, compares the actual temperature with the operating temperature acquired by the release management unit and performs a difference calculation. If the actual temperature is greater than the operating temperature and the temperature difference is greater than a preset error, a high temperature warning is generated; if the actual temperature is less than the operating temperature and the temperature difference is greater than a preset error, a low temperature warning is generated; if the temperature difference is less than the preset error, a normal temperature reminder is generated;

[0018] After generating a low temperature warning, the temperature control unit generates a fin heating signal, and switches to a heat pipe heating signal if the low temperature warning does not disappear after the heating fin operating power reaches the maximum, and switches to a flow rate reduction signal again if the low temperature warning does not disappear after the heating pipe operating power reaches the maximum.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, the fracturing fluid at the bottom of the tank body is heated by the heating pipe at the bottom, so that the temperature of the fracturing fluid at the bottom is higher than that of the fracturing fluid at the top. The lower temperature of the fracturing fluid at the top can reduce the temperature loss of the fracturing fluid at the top. At the same time, the density of the fracturing fluid will decrease after heating, resulting in the rise of the fracturing fluid with a higher temperature and the decrease of the fracturing fluid with a lower temperature, thereby realizing the liquid circulation inside the tank body, controlling the temperature difference in the fracturing fluid tank within a certain range, and further heating the released fracturing fluid by heating fins to reach the appropriate temperature required for the fracturing work, thereby ensuring the use effect of the fracturing fluid, avoiding the influence of the fracturing fluid temperature being too low on the use, and reducing the heat loss when the fracturing fluid is heated.

[0021] In the present invention, when the preheating temperature of the fracturing fluid is controlled, a comprehensive analysis is performed based on the heat dissipation capacity of the environment, the heating capacity of the heating fins, and the required release temperature and flow rate of the pressure fluid, so as to intelligently adjust the preheating temperature in the pressure fluid tank, so that the fracturing fluid can be maintained at the preheating temperature to avoid freezing, and can be quickly heated to the required temperature when it needs to be released, and the heat loss of the fracturing fluid when the temperature is maintained for a long time can be reduced, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0025] Figure 3 It is a schematic diagram of the heating fin structure of the present invention;

[0026] Figure 4 It is a system block diagram of the present invention.

[0027] In the figure: 1. tank body; 2. sealing cover; 3. liquid outlet pipe; 4. flange; 5. liquid inlet pipe; 6. heating fins; 7. insulation chamber; 8. terminal; 9. wire; 10. heating tube. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. 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 are within the scope of protection of the present invention. Example

[0029] See also Figure 1 - Figure 3As shown, a fracturing liquid tank comprises a tank body 1, and sealing covers 2 are installed at both ends of the tank body 1, a liquid outlet pipe 3 is fixedly installed on the sealing cover 2 on one side, a heating fin 6 is fixedly installed inside the liquid outlet pipe 3, and wires 9 are installed on both sides of the heating fin 6. The wires 9 pass through the liquid outlet pipe 3 on both sides, and the wires 9 are exposed to the outside of the liquid outlet pipe 3. The part of the wire 9 connected to the outside of the liquid outlet pipe 3 is connected with a terminal 8, and the terminal 8 is used to connect with an external power supply to supply power to the heating fin 6. The heating fin 6 can achieve temperature increase through the thermoelectric effect, heat the liquid passing through the heating fin 6, and control the operating temperature of the liquid, so as to avoid the liquid temperature being too low, resulting in an increase in liquid viscosity and affecting the fracturing operation. The end of the liquid outlet pipe 3 is away from the sealing cover 2. A flange 4 is fixedly installed, and is connected to the fracturing operation pipeline through the flange 4 to transport the liquid in the fracturing liquid tank to the fracturing operation system. The heating fin 6 is in a circular ring shape on the outside and a plate-like structure distributed in a circumference on the inside, so that the fracturing fluid passes through the inside of the heating fin 6 by replacing the pipeline with the circular ring on the outside of the heating fin 6. At the same time, the plate-like structure can increase the contact area between the fracturing fluid and the heating fin 6, and improve the heating effect of the heating fin 6. The area between the circular ring structure of the heating fin 6 and the liquid outlet pipe 3 is a high vacuum area, which has the effect of heat preservation and heat insulation, which is conducive to reducing the heat dissipated by the heating fin 6 in the air, keeping the temperature of the heating fin 6 stable and reducing the energy consumption of the heating fin 6;

[0030] A liquid inlet pipe 5 is installed inside the sealing cover 2, and the top of the liquid inlet pipe 5 is connected to the circular ring structure of the heating fin 6, and the bottom end of the liquid inlet pipe 5 is close to the bottom end of the tank body 1, so that the fracturing fluid is absorbed through the bottom end of the tank body 1, ensuring that the fracturing fluid absorption operation can be completed even when the residual amount of fracturing fluid is small. At the same time, an arc-shaped heating pipe 10 is arranged at the bottom of the tank body 1 in an S shape near the bottom of the tank body 1. The length of the heating pipe 10 is increased by the S-shaped arrangement to improve the heating effect. At the same time, the S-shaped heating pipe 10 located at the bottom can heat the fracturing fluid at the bottom of the tank body 1, so that the temperature of the fracturing fluid at the bottom of the tank body 1 is higher than that of the fracturing fluid at the top, and the liquid inlet of the liquid inlet pipe 5 is located at the bottom of the tank body 1, thereby realizing preheating of the fracturing fluid absorbed by the liquid inlet pipe 5. At the same time, since the temperature of the fracturing fluid at the bottom of the tank body 1 is higher than that of the fracturing fluid at the top, and the fracturing fluid The temperature loss is related to the temperature difference between the fracturing fluid itself and the external environment. The lower temperature of the fracturing fluid at the top can reduce the temperature loss of the top fracturing fluid. The bottom fracturing fluid will be used first because it is close to the inlet pipe 5, reducing the temperature exchange time between the bottom fracturing fluid and the environment, thereby reducing the heat lost to the environment during preheating of the fracturing fluid and reducing the energy consumption of the heating system. In addition, since the density of the fracturing fluid will decrease after heating, the fracturing fluid with a higher temperature will rise and the fracturing fluid with a lower temperature will fall, thus realizing the liquid circulation inside the tank body 1 and ensuring that the temperature difference between the fracturing fluid at the bottom of the tank body 1 and the fracturing fluid at the top of the tank body 1 is controlled within a reasonable range to avoid excessive temperature difference. Therefore, when the fracturing fluid is consumed at a faster rate, the top fracturing fluid can ensure sufficient heating speed when it descends to the port of the inlet pipe 5 to avoid affecting the use of the fracturing fluid.

[0031] After the fracturing fluid is preliminarily preheated by the heating tube 10 at the bottom of the tank body 1, it is sucked in through the liquid inlet pipe 5 and is further heated when passing through the heating fins 6 to reach the appropriate temperature required for fracturing work, so that the fracturing fluid stored in the tank body 1 is maintained at the preheating temperature, reducing heat loss, and is heated to the working temperature through the heating fins 6 to ensure the use effect of the fracturing fluid. The preheating temperature and the fracturing fluid passing speed are reasonably distributed by the fracturing fluid tank circulation heating system to ensure that the heating efficiency of the heating fins 6 meets the standard. Example

[0032] See also Figure 1 - Figure 4 As shown, a circulating heating system for a fracturing fluid tank includes a release management unit, an environment calculation unit, a preheating management unit and a temperature control unit. The release management unit collects the release speed of the fracturing fluid, which is the flow rate of the fracturing fluid when passing through the heating fins 6. The environment calculation unit collects the heat dissipation capacity of the environment. The temperature control unit collects the temperature at the outlet end of the fracturing fluid. The preheating management unit controls the heating power of the heating tube 10 and the heating fins 6.

[0033] The environmental heat dissipation capacity collected by the environmental calculation unit includes the environmental temperature, the environmental wind speed and the surface humidity of the tank body 1. The environmental calculation unit records the environmental temperature as HT, the environmental wind speed as FS, the surface humidity of the tank body 1 as RH, and the preheating temperature in the fracturing fluid tank as T. The environmental heat dissipation capacity S is generated through formula analysis. The environment calculation unit compares the environment heat dissipation capacity S with the preset heat dissipation threshold. If the environment heat dissipation capacity S is less than the preset heat dissipation threshold, a heat dissipation compliance signal is generated. If the environment heat dissipation capacity is greater than or equal to the preset heat dissipation threshold, a heat dissipation energy consumption signal is generated.

[0034] The release management unit obtains the fracturing fluid release rate required for production by manual input, and records it as the standard flow rate. It obtains the fracturing fluid release temperature required for production, and records it as the operating temperature. The release management unit sends the standard flow rate to the preheating management unit. After obtaining the standard flow rate, the preheating management unit substitutes the standard flow rate, the operating temperature and the heat exchange efficiency of the heating fin 6 into the cloud heating model. The cloud heating model calculates the temperature increase amplitude of the fracturing fluid when passing through the heating fin 6 by the standard flow rate and the heat exchange efficiency of the heating fin, and records the difference between the operating temperature and the temperature increase amplitude as the minimum preheating temperature. The preheating management unit compares the minimum preheating temperature with the current preheating temperature maintained by the current heating tube 10. If the current preheating temperature is less than or equal to the minimum preheating temperature, a preheating temperature increase signal is generated. If the current preheating temperature is greater than the minimum preheating temperature, a preheating temperature sufficient signal is generated. The preheating management unit controls the operating power increase of the heating tube 10 through the preheating temperature increase signal.

[0035] After the preheating management unit obtains the preheating temperature sufficient signal, if the environment calculation unit generates a heat dissipation energy consumption signal at the same time, it generates a preheating temperature reduction signal; if the environment calculation unit generates a heat dissipation standard signal at the same time, it generates a fin temperature reduction signal;

[0036] After generating the fin cooling signal, the preheating management unit obtains the current preheating temperature and operating temperature, and substitutes the current preheating temperature, operating temperature and standard flow rate into the cloud heating model. The cloud heating model calculates the required temperature rise for the heating fin 6 through the preheating temperature and operating temperature, and calculates the required surface temperature of the heating fin 6 through the required temperature rise for the heating fin 6, the standard flow rate and the heat exchange efficiency of the heating fin. The required surface temperature of the heating fin 6 is used to control the heating fin 6 to drop from the maximum temperature to the required surface temperature of the heating fin 6. Example

[0037] See also Figure 1 - Figure 4As shown, the temperature control unit records the collected temperature at the outlet of the fracturing fluid as the actual temperature, compares the actual temperature with the operating temperature obtained by the release management unit and calculates the difference. If the actual temperature is greater than the operating temperature and the temperature difference is greater than the preset error, a high temperature warning is generated; if the actual temperature is less than the operating temperature and the temperature difference is greater than the preset error, a low temperature warning is generated; if the temperature difference is less than the preset error, a normal temperature reminder is generated;

[0038] After generating a low temperature warning, the temperature control unit generates a fin heating signal, and switches to a heat pipe heating signal if the low temperature warning does not disappear after the heating fin 6 operating power reaches the maximum, and switches to a flow rate reduction signal if the low temperature warning does not disappear after the heating tube 10 operating power reaches the maximum.

[0039] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fracturing fluid tank circulation heating system, characterized in that: The invention comprises a tank body (1), wherein sealing covers (2) are installed at both ends of the tank body (1), wherein a liquid outlet pipe (3) is fixedly installed on the sealing cover (2) on one side, a heating fin (6) is fixedly installed inside the liquid outlet pipe (3), and wires (9) are installed on both sides of the heating fin (6), and the wires (9) pass through the liquid outlet pipe (3) on both sides, and the part of the wire (9) exposed to the outside of the liquid outlet pipe (3) is connected to a terminal (8), and the terminal (8) is used to connect to an external power supply, and a flange (4) is fixedly installed on one end of the liquid outlet pipe (3) away from the sealing cover (2), and is connected to a fracturing operation pipeline through the flange (4), the heating fin (6) is in a circular ring shape on the outside, and in a plate-like structure distributed in a circumference on the inside, and a high vacuum insulation chamber (7) is provided between the circular ring structure of the heating fin (6) and the liquid outlet pipe (3); A liquid inlet pipe (5) is installed inside the sealing cover (2), the top end of the liquid inlet pipe (5) is connected to the circular ring structure of the heating fin (6), the bottom end of the liquid inlet pipe (5) is close to the bottom end of the tank body (1), and a heating pipe (10) with an arc structure is arranged at the bottom of the tank body (1), and the heating pipe (10) is arranged in an S shape near the bottom of the tank body (1); It also includes a release management unit, an environment calculation unit, a preheating management unit and a temperature control unit, wherein the release management unit acquires a standard flow rate and an operating temperature of the fracturing fluid, wherein the standard flow rate is the flow rate of the fracturing fluid supply speed required for production when passing through the heating fins (6), and the operating temperature is the temperature of the fracturing fluid when it is released from the heating fins (6); The environment calculation unit analyzes and calculates the environment heat dissipation capacity to generate a heat dissipation compliance signal or a heat dissipation energy consumption signal; The temperature control unit collects the temperature of the outlet end of the fracturing fluid, compares the collected temperature with a preset temperature, and performs early warning and automatic correction control according to the comparison result; The preheating management unit judges and analyzes the preheating temperature in the tank body (1) based on the collected release speed and operating temperature, and adjusts the operating temperature of the heating tube (10) and the heating fin (6); The environmental heat dissipation capacity collected by the environmental calculation unit includes the environmental temperature, the environmental wind speed and the surface humidity of the tank body (1). The environmental calculation unit records the environmental temperature, the environmental wind speed and the surface humidity of the tank body (1) and generates the environmental heat dissipation capacity through formula analysis. The environmental calculation unit compares the environmental heat dissipation capacity with a preset heat dissipation threshold. If the environmental heat dissipation capacity is less than the preset heat dissipation threshold, a heat dissipation compliance signal is generated. If the environmental heat dissipation capacity is greater than or equal to the preset heat dissipation threshold, a heat dissipation energy consumption signal is generated.

2. A fracturing fluid tank circulation heating system according to claim 1, characterized in that: The release management unit obtains the standard flow rate and the operating temperature, and the release management unit sends the standard flow rate to the preheating management unit. After obtaining the standard flow rate, the preheating management unit substitutes the standard flow rate, the operating temperature and the heat exchange efficiency of the heating fin (6) into the cloud heating model. The cloud heating model calculates the temperature rise amplitude when the fracturing fluid passes through the heating fin (6) through the standard flow rate and the heat exchange efficiency of the heating fin (6), and records the difference between the operating temperature and the temperature rise amplitude as the minimum preheating temperature. The preheating management unit compares the minimum preheating temperature with the current preheating temperature maintained by the current heating pipe (10). If the current preheating temperature is less than or equal to the minimum preheating temperature, a preheating temperature increase signal is generated. If the current preheating temperature is greater than the minimum preheating temperature, a preheating temperature sufficient signal is generated. The preheating management unit controls the operating power increase of the heating pipe (10) through the preheating temperature increase signal.

3. A fracturing fluid tank circulation heating system according to claim 2, characterized in that: After the preheating management unit obtains the preheating temperature sufficient signal, if the environment calculation unit generates a heat dissipation energy consumption signal at the same time, it generates a preheating temperature reduction signal; if the environment calculation unit generates a heat dissipation standard signal at the same time, it generates a fin temperature reduction signal; After generating the fin cooling signal, the preheating management unit obtains the current preheating temperature and the operating temperature, and substitutes the current preheating temperature, the operating temperature and the standard flow rate into the cloud heating model. The cloud heating model calculates the required temperature rise of the heating fin (6) through the preheating temperature and the operating temperature, calculates the required surface temperature of the heating fin (6) through the required temperature rise of the heating fin (6), the standard flow rate and the heat exchange efficiency of the heating fin (6), and controls the heating fin (6) to reduce from the highest temperature to the required surface temperature of the heating fin (6) through the required surface temperature of the heating fin (6).

4. A fracturing fluid tank circulation heating system according to claim 3, characterized in that: The temperature control unit records the collected temperature at the outlet of the fracturing fluid as the actual temperature, compares the actual temperature with the operating temperature acquired by the release management unit and performs a difference calculation. If the actual temperature is greater than the operating temperature and the temperature difference is greater than a preset error, a high temperature warning is generated; if the actual temperature is less than the operating temperature and the temperature difference is greater than a preset error, a low temperature warning is generated; if the temperature difference is less than the preset error, a normal temperature reminder is generated; The temperature control unit generates a fin heating signal after generating a low temperature warning, and switches to a heat pipe heating signal if the low temperature warning does not disappear after the heating fin (6) operating power reaches the maximum, and switches to a flow rate reduction signal again if the low temperature warning does not disappear after the heating pipe (10) operating power reaches the maximum.

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