Temperature control system for conveying non-Newtonian high viscosity fluids

Abstract

The application discloses a temperature control system for non-Newton high-viscosity fluid conveying, which comprises a conveying main pipe, conveying branch pipes, main pipe heat exchangers and a constant-temperature water tank. The conveying branch pipes are multiple, all of which are arranged on the conveying main pipe behind the main pipe heat exchangers and are connected with the conveying main pipe correspondingly. The main pipe heat exchangers are multiple and are arranged on the conveying main pipe in series at intervals. A first temperature sensor is arranged on the conveying main pipe in front of the frontmost main pipe heat exchanger. A second temperature sensor is arranged on the conveying main pipe behind the last main pipe heat exchanger. The first temperature sensor, the second temperature sensor and the constant-temperature water tank are connected with a control unit respectively, so that the control unit can adjust the temperature of the constant-temperature water tank according to the real-time temperature transmitted by the second temperature sensor. The temperature control system has high heat exchange efficiency and can effectively control the temperature of each use point of the non-Newton high-viscosity fluid, thereby ensuring that the temperature fluctuation range of each use point is small.

Description

Technical Field

[0001] The invention belongs to a temperature control system for fluid transportation, and in particular relates to a temperature control system for non-Newtonian high-viscosity fluid transportation. Background Art

[0002] Non-Newtonian fluids are widely present in daily life and production. In the automotive manufacturing process, sealants used in gluing operations are mostly non-Newtonian fluids. During the gluing process, the non-Newtonian fluid needs to be transported to the point of use. During this process, it passes through pipes, filters, pressure regulators, and ball valves, which inevitably causes changes in the internal shear rate of the non-Newtonian fluid, thereby converting the potential energy of the non-Newtonian fluid into heat energy, which in turn causes changes in the temperature of the non-Newtonian fluid. Currently, the most effective method is to control the temperature at the point of use to ensure a small fluctuation range, with the expected value usually being ±2°C or less. This ensures that the viscosity of the non-Newtonian fluid is consistent to meet process requirements and thus guarantee the quality of the gluing.

[0003] Existing temperature control systems primarily utilize two methods: wrapping heating cables around pipelines for transporting non-Newtonian, high-viscosity fluids, and employing a shell-and-sleeve tube-in-tube heat exchanger in the main pipeline. However, wrapping heating cables only heats the fluid and cannot cool it down when the ambient temperature is high. Furthermore, the main pipeline utilizes a tube-in-tube heat exchanger for temperature control. However, due to the length of the main pipeline, a significant amount of space is required at the installation site for the tube-in-tube heat exchanger, resulting in high manufacturing costs. Furthermore, the low thermal conductivity of non-Newtonian, high-viscosity fluids makes the heat transfer efficiency of the tube-in-tube heat exchanger low.

[0004] Therefore, providing a temperature control system with high heat exchange efficiency and the ability to effectively control the temperature of each use point of non-Newtonian high-viscosity fluid is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned shortcomings of the prior art, the present invention provides a temperature control system for transporting non-Newtonian, high-viscosity fluids. This temperature control system boasts high heat exchange efficiency and effectively controls the temperature at each point of use for the non-Newtonian, high-viscosity fluid, ensuring minimal temperature fluctuations at each point, thereby improving adhesive coating quality.

[0006] A temperature control system for transporting non-Newtonian high-viscosity fluids includes a main transport pipe, a branch transport pipe, a main transport heat exchanger, and a constant-temperature water tank. The main transport heat exchanger is disposed on the main transport pipe, and its water inlet is connected to the water outlet of the constant-temperature water tank, while its outlet is connected to the water inlet of the constant-temperature water tank, thereby utilizing a heat exchange medium and the non-Newtonian high-viscosity fluid for heat exchange. Multiple branch transport pipes are provided, all located on the main transport pipe behind the main transport heat exchanger and connected to the main transport pipe. Multiple main transport heat exchangers are shell-and-tube heat exchangers, and all are arranged in series on the main transport pipe at intervals. A first temperature sensor is provided on the main transport pipe corresponding to the frontmost main transport heat exchanger, for detecting the temperature of the non-Newtonian high-viscosity fluid before heat exchange. A second temperature sensor is provided on the main transport pipe corresponding to the rearmost main transport heat exchanger, for detecting the temperature of the non-Newtonian high-viscosity fluid after heat exchange. The first temperature sensor, the second temperature sensor, and the constant-temperature water tank are each connected to a control unit, so that the control unit adjusts the temperature of the constant-temperature water tank based on the real-time temperature transmitted by the second temperature sensor.

[0007] Furthermore, the water inlet of the frontmost main heat exchanger is connected to the water outlet of the constant temperature water tank, the water outlet of the rearmost main heat exchanger is connected to the water inlet of the constant temperature water tank, and the water inlet and water outlet of any middle main heat exchanger are respectively connected to the water outlet of the previous main heat exchanger and the water inlet of the next main heat exchanger.

[0008] Furthermore, each delivery branch pipe is provided with a branch pipe heat exchanger, which is a shell-and-tube heat exchanger. Along the flow direction of the non-Newtonian high-viscosity fluid in the delivery main pipe, the water inlet of the front branch pipe heat exchanger is connected to the water outlet of the rear main pipe heat exchanger, the water outlet of the rear branch pipe heat exchanger is connected to the water inlet of the constant temperature water tank, and the water inlet and outlet of any middle branch pipe heat exchanger are respectively connected to the water outlet of the previous branch pipe heat exchanger and the water inlet of the next branch pipe heat exchanger.

[0009] Furthermore, a third temperature sensor is provided on the delivery branch pipe corresponding to the liquid outlet of the rearmost branch pipe heat exchanger, and the third temperature sensor is connected to the control unit, so that the control unit can adjust the temperature of the constant temperature water tank according to the real-time temperature transmitted by the third temperature sensor.

[0010] Furthermore, the water inlet and liquid outlet of each main heat exchanger and branch heat exchanger are located at the same end, so that the heat exchange medium enters the main heat exchanger and the branch heat exchanger and performs countercurrent heat exchange with the non-Newtonian high viscosity fluid.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention provides heat exchangers on both the main delivery pipe and the branch delivery pipe, thereby controlling the temperature of the non-Newtonian high-viscosity fluid simultaneously on both the main delivery pipe and the branch delivery pipe through the heat exchanger, which is beneficial to ensuring that the temperature fluctuation range of each use point is small, effectively ensuring the consistency of the viscosity of the non-Newtonian high-viscosity fluid, and thus helping to improve the quality of glue coating.

[0013] 2. The present invention adopts a shell-and-tube heat exchanger to replace the tube-in-tube heat exchanger of the existing temperature control system, which increases the heat exchange area and improves the heat exchange efficiency, while also reducing the installation difficulty and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 -Schematic diagram of the structure of the present invention.

[0015] Among them: 1-delivery main pipe; 2-delivery branch pipe; 3-main pipe heat exchanger; 4-constant temperature water tank; 5-first temperature sensor; 6-second temperature sensor; 7-control unit; 8-branch pipe heat exchanger; 9-third temperature sensor. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] See also Figure 1 , a temperature control system for transporting non-Newtonian high-viscosity fluids, comprising a transport main pipe 1, a transport branch pipe 2, a main pipe heat exchanger 3 and a constant-temperature water tank 4, wherein the main pipe heat exchanger is arranged on the transport main pipe 1, and the water inlet of the main pipe heat exchanger 3 is connected to the water outlet of the constant-temperature water tank 4, and the water outlet of the main pipe heat exchanger 3 is connected to the water inlet of the constant-temperature water tank 4, thereby utilizing the heat exchange medium and the non-Newtonian high-viscosity fluid for heat exchange, wherein the transport branch pipes 2 are multiple, and all the transport branch pipes 2 are located on the transport main pipe 1 behind the main pipe heat exchanger 3 and are respectively connected to the transport main pipe 1; the main pipe heat exchanger 3 is a shell-and-tube heat exchanger and There are multiple main heat exchangers 3, and all main heat exchangers 3 are arranged in series at intervals on the delivery main pipe 1. A first temperature sensor 5 is provided on the delivery main pipe 1 corresponding to the front of the front main heat exchanger 3, which is used to detect the temperature of the non-Newtonian high-viscosity fluid before heat exchange; a second temperature sensor 6 is provided on the delivery main pipe 1 corresponding to the rear of the rear main heat exchanger 3, which is used to detect the temperature of the non-Newtonian high-viscosity fluid after heat exchange; the first temperature sensor 5, the second temperature sensor 6 and the constant temperature water tank 4 are respectively connected to the control unit 7, so that the control unit 7 can adjust the temperature of the constant temperature water tank 4 according to the real-time temperature transmitted by the second temperature sensor 6.

[0018] Figure 1The arrows on the solid line represent the flow direction of the non-Newtonian high-viscosity fluid, and the arrows on the dotted line represent the flow direction of the heat exchange medium (usually water). In the present invention, "front" and "back" are described based on the flow direction of the non-Newtonian high-viscosity fluid in the delivery main pipe. The heat exchange medium pipeline, delivery main pipe and delivery branch pipe all include an insulation layer for insulating the constant temperature water and the non-Newtonian high-viscosity fluid. Here, a shell-and-tube heat exchanger is used to replace the shell-and-tube heat exchanger used in the existing temperature control system, which increases the heat exchange area between the heat exchange medium and the non-Newtonian high-viscosity fluid, thereby improving the heat exchange efficiency. At the same time, due to the high heat exchange efficiency of the shell-and-tube heat exchanger, multiple shell-and-tube heat exchangers can be set up in series for use, and in specific implementation, shell-and-tube heat exchangers with a length of 3 to 6 meters are often used. In this way, only multiple installation length spaces of 3 to 6 meters are required to install the shell-and-tube heat exchangers, thereby reducing the difficulty of installation. And with this arrangement, after the non-Newtonian high-viscosity fluid returns to the main delivery pipe after heat exchange in the previous tube heat exchanger, it is mixed and then enters the next tube heat exchanger for heat exchange, which is also beneficial to improve the heat exchange efficiency and heat exchange uniformity to a certain extent.

[0019] The first temperature sensor and the second temperature sensor feed back the real-time temperature to the control unit, which is beneficial for the control unit to monitor the temperature of the non-Newtonian high-viscosity fluid before and after heat exchange, and is convenient for the operator to observe. At the same time, when the real-time temperature transmitted by the second temperature sensor is higher than the set temperature range, the control unit controls the constant temperature water tank to lower the temperature of the constant temperature water tank. When the real-time temperature transmitted by the second temperature sensor is lower than the set temperature range, the control unit controls the constant temperature water tank to increase the temperature of the constant temperature water tank.

[0020] During specific implementation, the water inlet of the frontmost main heat exchanger 3 is connected to the water outlet of the constant temperature water tank 4, the water outlet of the rearmost main heat exchanger 3 is connected to the water inlet of the constant temperature water tank 4, and the water inlet and water outlet of any middle main heat exchanger 3 are connected to the water outlet of the previous main heat exchanger 3 and the water inlet of the next main heat exchanger 3 respectively.

[0021] In this way, constant temperature water from a constant temperature water tank enters all main heat exchangers in turn to perform continuous heat exchange with the non-Newtonian high-viscosity fluid. The flow rate of the constant temperature water is much higher than that of the non-Newtonian high-viscosity fluid. The temperature fluctuation of the constant temperature water in the entire constant temperature water delivery pipe is no more than ±0.5°C. At the same time, it is avoided that each main heat exchanger is equipped with a constant temperature water tank, thereby reducing costs.

[0022] During specific implementation, each delivery branch pipe 2 is provided with a branch pipe heat exchanger 8, which is a shell-and-tube heat exchanger. Along the flow direction of the non-Newtonian high-viscosity fluid in the delivery main pipe, the water inlet of the front branch pipe heat exchanger is connected to the water outlet of the rear main pipe heat exchanger 3, and the water outlet of the rear branch pipe heat exchanger 8 is connected to the water inlet of the constant temperature water tank. The water inlet and outlet of any middle branch pipe heat exchanger 8 are respectively connected to the water outlet of the previous branch pipe heat exchanger 8 and the water inlet of the next branch pipe heat exchanger 8.

[0023] In this embodiment, the branch heat exchanger utilizes a shell-and-tube heat exchanger with a length of 1.2-1.5m. Because the thermal conductivity of non-Newtonian, high-viscosity fluids is low, their temperature often fails to reach the set temperature range after passing through the main heat exchanger. Therefore, a branch heat exchanger is installed on the branch pipe to further control the temperature of the non-Newtonian, high-viscosity fluid within the branch pipe, thereby pre-compensating for the fluid's viscosity. Furthermore, with this arrangement, the constant-temperature water from the constant-temperature water tank sequentially enters all main heat exchangers and all branch heat exchangers, continuously exchanging heat with the fluid.

[0024] During specific implementation, a third temperature sensor 9 is provided on the delivery branch pipe 2 corresponding to the liquid outlet of the rearmost branch heat exchanger 8. The third temperature sensor 9 is connected to the control unit 7, so that the control unit 7 can adjust the temperature of the constant temperature water tank 4 according to the real-time temperature transmitted by the third temperature sensor 9.

[0025] In this way, the real-time temperatures transmitted by the first and second temperature sensors are only for operator observation and monitoring. The control unit primarily adjusts the temperature of the thermostatic water tank based on the temperature transmitted by the third temperature sensor. When the real-time temperature transmitted by the third temperature sensor is higher than the set temperature, the control unit controls the thermostatic water tank to lower the temperature. When the real-time temperature transmitted by the third temperature sensor is lower than the set temperature, the control unit controls the thermostatic water tank to raise the temperature. If the temperature of the third temperature sensor is within the set range, it indicates that the fluid temperature at the fluid use end of all intermediate delivery branches is also within the set range, thus ensuring that the viscosity of the non-Newtonian fluid at each use point meets the process requirements.

[0026] In specific implementation, the water inlet and liquid outlet of each main heat exchanger 3 and branch heat exchanger 8 are located at the same end, so that the heat exchange medium enters the main heat exchanger and the branch heat exchanger to perform countercurrent heat exchange with the non-Newtonian high viscosity fluid.

[0027] In this way, the flow direction of the heat exchange medium (constant temperature water) and the flow direction of the non-Newtonian high viscosity fluid are in countercurrent form, which greatly improves the heat exchange efficiency.

[0028] Finally, it should be noted that the above embodiments of the present invention are merely examples for illustrating the present invention and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations and modifications can be made based on the above description. It is not possible to enumerate all embodiments here. Any obvious variations or modifications arising from the technical solution of the present invention remain within the scope of protection of the present invention.

Claims

1. A temperature control system for transporting non-Newtonian high-viscosity fluids, comprising a main transport pipe, a branch transport pipe, a main transport heat exchanger, and a thermostatic water tank. The main transport pipe is provided with an insulation layer. The main transport heat exchanger is disposed on the main transport pipe, and the water inlet of the main transport heat exchanger is connected to the water outlet of the thermostatic water tank, and the water outlet of the main transport heat exchanger is connected to the water inlet of the thermostatic water tank, thereby utilizing the heat exchange medium and the non-Newtonian high-viscosity fluid for heat exchange. The branch transport pipes are provided in a plurality of manners, all of which are located on the main transport pipe behind the main transport heat exchanger and are respectively connected to the main transport pipe. The invention is characterized in that: The main heat exchanger is a shell-and-tube heat exchanger and there are multiple of them. All main heat exchangers are arranged in series on the delivery main pipe at intervals. A first temperature sensor is provided on the delivery main pipe corresponding to the front of the front main heat exchanger, which is used to detect the temperature of the non-Newtonian high-viscosity fluid before heat exchange; a second temperature sensor is provided on the delivery main pipe corresponding to the rear of the rear main heat exchanger, which is used to detect the temperature of the non-Newtonian high-viscosity fluid after heat exchange; the first temperature sensor, the second temperature sensor and the constant temperature water tank are respectively connected to the control unit, so that the control unit can adjust the temperature of the constant temperature water tank according to the real-time temperature transmitted by the second temperature sensor; Each delivery branch pipe is provided with a branch pipe heat exchanger, which is a shell-and-tube heat exchanger. Along the flow direction of the non-Newtonian high-viscosity fluid in the delivery main pipe, the water inlet of the front branch pipe heat exchanger is connected to the water outlet of the rear main pipe heat exchanger, and the water outlet of the rear branch pipe heat exchanger is connected to the water inlet of the constant temperature water tank. The water inlet and outlet of any branch pipe heat exchanger in the middle are connected to the water outlet of the previous branch pipe heat exchanger and the water inlet of the next branch pipe heat exchanger respectively. A third temperature sensor is provided on the delivery branch pipe corresponding to the liquid outlet of the rearmost branch pipe heat exchanger. The third temperature sensor is connected to the control unit so that the control unit can adjust the temperature of the constant temperature water tank according to the real-time temperature transmitted by the third temperature sensor. The water inlet of the front main heat exchanger is connected to the water outlet of the constant temperature water tank, the water outlet of the rear main heat exchanger is connected to the water inlet of the constant temperature water tank, and the water inlet and outlet of any middle main heat exchanger are connected to the water outlet of the previous main heat exchanger and the water inlet of the next main heat exchanger respectively; The water inlet and liquid outlet of each main heat exchanger and branch heat exchanger are located at the same end, so that the heat exchange medium enters the main heat exchanger and the branch heat exchanger and performs countercurrent heat exchange with the non-Newtonian high viscosity fluid.

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