Plate type fluid heater with temperature control system

Abstract

The invention discloses a plate type fluid heater with a temperature control system, relates to the technical field of heat exchangers, can improve the fluid heating effect through cold and hot fluid channels which are arranged in a crossed manner, and can control the fluid heating effect by controlling the flow of cold and hot fluid in practice. The fluid passing mode is improved on the basis that the heat exchange effect is affected by the flow, and the heat exchange efficiency is improved; when the cold fluid outlet temperature fluctuation of the balance temperature control system is large, operation control is triggered through a temperature sensor, the current composite fault type is comprehensively judged according to the current cold fluid flow value, the temperature difference value and the specific heat capacity value, corresponding flow infusion control is adopted, and the control accuracy is improved. Reverse restriction adjustment of the temperature of the heater is carried out through heat exchange amount changes, it is ensured that the heater can cope with composite faults and carry out targeted adjustment, and the problem that the product quality is affected by the large outlet temperature fluctuation range is solved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more specifically to a plate fluid heater with a temperature control system. Background Technology

[0002] Plate heaters are heat exchangers specifically designed to heat fluids to a specific temperature without phase change. This type of heat exchanger is widely used in industrial production, especially in applications requiring preheating or heating of fluids.

[0003] Referring to a high-temperature plate heat exchanger and temperature control method disclosed in the prior art (patent publication number CN114184065A), which can recover and utilize the heat of flue gas and regulate the temperature of the high-temperature heat exchange plate by setting up a cooling air branch, when applied to the traditional heating process, if multi-sensor coupling and synchronous measurement is not used for dynamic operating conditions such as fluid flow rate and inlet temperature fluctuations, it is easy to encounter problems where single over-temperature or low-temperature protection cannot cope with compound faults (such as sudden flow drop + heater runaway), resulting in a large range of outlet temperature fluctuations and affecting product quality. Therefore, this invention proposes a solution. Summary of the Invention

[0004] The purpose of this invention is to provide a plate fluid heater with a temperature control system to solve the problem of being unable to cope with complex faults due to the inability to perform multi-sensor coupling and synchronous measurement under dynamic operating conditions.

[0005] The objective of this invention can be achieved through the following technical solution: a plate fluid heater with a temperature control system, including a temperature control heat exchange assembly, wherein the temperature control heat exchange assembly includes a plate one and a plate two that are installed alternately in the front and rear side plates, and a sealing gasket layer one and a sealing gasket layer two are respectively installed on the same side of the plate one and the plate two, and the plate one and the plate two are respectively provided with corrugations one and two corresponding to the sealing gasket layer one and the sealing gasket layer two;

[0006] The temperature control heat exchange component is also connected to a balanced temperature control system, which includes a processor, a parameter detection module, a distribution analysis module, and an execution adjustment module that are connected to each other.

[0007] The parameter detection module is used to obtain the comprehensive value of parameter changes of the cold fluid in the temperature control heat exchange component of the heater per unit time, and send the comprehensive value of parameter changes CBz to the adjustment and analysis module via the processor;

[0008] The allocation analysis module compares and analyzes the preset parameter change threshold CBzy and the comprehensive parameter change value CBz in the processor to generate positive and negative adjustment signals, and sends the generated positive and negative adjustment signals to the execution adjustment module.

[0009] The adjustment module receives positive and negative adjustment signals and executes the corresponding actions.

[0010] The further configuration is as follows: the comparative analysis process of the allocation analysis module is as follows: when CBz < CBzy, it indicates that a sudden drop in the flow rate of the hot fluid is occurring, and a positive adjustment signal is generated and sent to the execution adjustment module; when CBz > CBzy, it indicates that a sudden increase in the flow rate of the hot fluid is occurring, and a reverse adjustment signal is generated and sent to the execution adjustment module; when CBz = CBzy, it indicates that the heat exchange is operating normally and no signal is generated.

[0011] The configuration is further defined as follows: a frame plate for sealing plate one and plate two is installed between the front side plate and the rear side plate on their adjacent sides, and a hot water inlet pipe, a hot water outlet pipe, a fluid inlet pipe and a fluid outlet pipe are respectively installed on the frame plate near the front side plate.

[0012] The plate is further configured such that: the portion of the plate corresponding to the hot water inlet pipe and the hot water outlet pipe is provided with a hot water inlet hole and a hot water outlet hole, and the portion of the plate corresponding to the fluid inlet pipe and the fluid outlet pipe is provided with a fluid inlet hole and a fluid outlet hole.

[0013] A further configuration is provided: a connecting gasket is installed on the portion of the adjacent plate one or plate two that is close to the sealing gasket one or sealing gasket two and corresponds to the hot water inlet, hot water outlet, fluid inlet and fluid outlet.

[0014] The connection gasket has the same thickness as the sealing gasket layer one and the sealing gasket layer two, and the plates one and the plates two also have the same thickness.

[0015] The further configuration is as follows: each of the two plates is equipped with a flow meter and a temperature sensor for the hot water inlet, hot water outlet, fluid inlet and fluid outlet, respectively.

[0016] The method is further configured such that: a fixed crossbar is installed on the front side plate and the rear side plate, which is inserted into the end of each plate one and plate two; and a locking rod connected to the front side plate and the rear side plate is installed at the middle of the upper and lower ends of each plate one and plate two.

[0017] The present invention has the following beneficial effects:

[0018] 1. This invention addresses the problem of being unable to handle complex faults due to the inability to perform multi-sensor coupling and synchronous measurement under dynamic operating conditions. The balanced temperature control system, when experiencing large fluctuations in the cold fluid outlet temperature, triggers operational control via a temperature sensor. It comprehensively determines the type of complex fault based on the current cold fluid flow rate, temperature difference, and specific heat capacity, and employs corresponding flow control. This allows the heater to adjust its temperature inversely based on changes in heat exchange, ensuring the heater can cope with complex faults and make targeted adjustments, thus preventing large outlet temperature fluctuations from affecting product quality.

[0019] 2. In the heat exchange process, the cross-connected hot and cold fluid channels enhance the fluid heating effect. In practice, the heating effect can be controlled by adjusting the flow rate of the hot and cold fluids. Based on the fact that the flow rate affects the heat exchange effect, the fluid flow method can be improved to enhance the heat exchange efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a side view and a bottom view schematic diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 4 This is a schematic diagram showing the disassembly of the adjacent plate body structure of the present invention;

[0025] Figure 5 This is a cross-sectional view of the left channel of the plate fluid heater of the present invention;

[0026] Figure 6 This is a cross-sectional view of the right channel of the plate fluid heater of the present invention;

[0027] Figure 7 This is a schematic diagram showing the installation position of the sensor assembly on the plate body of the present invention.

[0028] In the diagram: 1. Front panel; 2. Rear panel; 3. Frame plate; 4. Hot water inlet pipe; 5. Fluid inlet pipe; 6. Fluid outlet pipe; 7. Hot water outlet pipe; 8. Fixed crossbar; 9. Locking rod; 10. Plate 1; 11. Plate 2; 12. Sealing gasket 1; 13. Sealing gasket 2; 14. Corrugated section 1; 15. Corrugated section 2; 16. Hot water inlet; 17. Hot water outlet; 18. Fluid outlet; 19. Fluid inlet; 20. Connecting gasket; 21. Sensor assembly. Detailed Implementation

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Refer to Figures 1-7 As shown, the plate fluid heater with temperature control system in this embodiment includes a temperature control heat exchange assembly. The temperature control heat exchange assembly includes a first plate 10 and a second plate 11 that are installed alternately in the front side plate 1 and the rear side plate 2. A first sealing gasket layer 12 and a second sealing gasket layer 13 are respectively installed on the same side of the first plate 10 and the second plate 11. Corrugations 14 and 15 are respectively provided on the first plate 10 and the second plate 11 corresponding to the first sealing gasket layer 12 and the second sealing gasket layer 13.

[0031] A frame plate 3 for sealing plate 10 and plate 2 is installed between the front side plate 1 and the rear side plate 2. Hot water inlet pipe 4, hot water outlet pipe 7, fluid inlet pipe 5 and fluid outlet pipe 6 are respectively installed on the frame plate 3 near the front side plate 1. The temperature control heat exchange component is used in plate fluid heaters, and the main heat exchange principle is the same as the existing technology.

[0032] The difference lies in the fact that the heat exchange area can be set up in a way that expands its heat exchange range by using the alternating sealing gaskets 12 and 13. Furthermore, the cross-arrangement of the hot water inlet pipe 4, hot water outlet pipe 7, fluid inlet pipe 5, and fluid outlet pipe 6 can effectively improve the fluid heating efficiency.

[0033] Plate 10 has a hot water inlet 16 and a hot water outlet 17 corresponding to the hot water inlet pipe 4 and the hot water outlet pipe 7. Plate 21 has a fluid inlet 19 and a fluid outlet 18 corresponding to the fluid inlet pipe 5 and the fluid outlet pipe 6. Adjacent plates 10 or 21 are fitted with connecting gaskets 20 near sealing gasket 12 or sealing gasket 23 and corresponding to the hot water inlet 16, hot water outlet 17, fluid inlet 19 and fluid outlet 18.

[0034] With the setting of sealing gasket 12 or sealing gasket 23 and connecting gasket 20, the flow area of ​​cold fluid and hot fluid is set on plate 10 and plate 21 respectively, so that in the process of heating cold fluid, there is an equal effect of bidirectional flow area, thereby improving its heat exchange efficiency.

[0035] The thickness of the connecting gasket 20 is the same as the thickness of the sealing gasket 12 and the sealing gasket 23, and the thickness of the plate 10 and the plate 21 is also the same.

[0036] Plate 10 and Plate 21 are equipped with flow meters and temperature sensors for hot water inlet 16, hot water outlet 17, fluid inlet 19 and fluid outlet 18, respectively. They are used in temperature-controlled plate fluid heaters. The flow meters are used to measure the flow rate of the fluid, and the temperature sensors are used to measure the temperature of the fluid.

[0037] Fixed crossbars 8 are installed on the front side plate 1 and the rear side plate 2, which are inserted into the ends of each plate 10 and plate 11. Locking rods 9 connected to the front side plate 1 and the rear side plate 2 are installed at the middle of the upper and lower ends of each plate 10 and plate 11. It should be noted that the outer side of the plate 10 or plate 11 near the front side plate 1 and the rear side plate 2 is not provided with sealing gasket 12 or sealing gasket 23. The purpose is to prevent the provision of heat exchange channels near the front side plate 1 and the rear side plate 2, because the heat transfer efficiency of the front side plate 1 and the rear side plate 2 is poor.

[0038] Basic principle: In this invention, the heating effect of fluid is improved by using cross-arranged hot and cold fluid channels. In practical applications, the heating effect of fluid can be controlled by controlling the flow rate of hot and cold fluids. Based on the fact that the flow rate affects the heat exchange effect, the fluid passage method is improved to enhance the heat exchange efficiency.

[0039] Example 2: This example is a further intelligent optimization of the structure in Example 1 to solve the problem mentioned above of being unable to cope with complex faults due to the inability to perform multi-sensor coupling and synchronous measurement under dynamic working conditions. Specifically, it includes a balanced temperature control system that is communicatively connected to the temperature control heat exchange component. The balanced temperature control system includes a processor, a parameter detection module, a regulation and analysis module, and an execution adjustment module that are communicatively connected.

[0040] The parameter detection module is used to obtain the comprehensive value of parameter changes of the cold fluid in the temperature control heat exchange component of the heater per unit time. The comprehensive value of parameter changes consists of the cold fluid flow rate, specific heat capacity, and the temperature difference between the inlet and outlet of the cold fluid.

[0041] The cold fluid flow rate is measured by a flow meter installed at the fluid inlet 19 in the temperature control heat exchange component of the heater. The specific heat capacity is the constant pressure specific heat capacity and can be obtained by looking up a table. The temperature difference between the inlet and outlet of the cold fluid is measured by temperature sensors installed at the fluid inlet 19 and the fluid outlet 18, respectively.

[0042] Construct the formula for calculating the comprehensive value of parameter changes: , among them This indicates the flow rate at the fluid inlet 19. This represents the isobaric specific heat capacity of the current cold fluid, while This is represented as the temperature difference between fluid inlet 19 and fluid outlet 18, and both are dimensionless numerical calculations. The main purpose is to compare the subsequent calculation results with the preset conditions. Then, the comprehensive value of parameter change CBz is sent to the adjustment and analysis module via the processor.

[0043] It should be further explained that: the cold fluid refers to the fluid to be heated by the current plate fluid heater, while the hot fluid refers to the fluid used by the current plate fluid heater for heating. That is, the cold fluid is the liquid or gas to be heated, which is usually at a lower temperature when it enters the heater; while the hot fluid is the medium that provides heat, which is usually at a higher temperature when it enters the heater. In addition, the flow meter and temperature sensor mentioned are existing technologies that can be obtained and used without creative effort by those skilled in the art.

[0044] The allocation analysis module compares and analyzes the preset parameter change threshold CBzy and the comprehensive parameter change value CBz in the processor:

[0045] When CBz < CBzy, it indicates that a sudden drop in the flow rate of the hot fluid is occurring, and a positive adjustment signal is generated and sent to the adjustment module.

[0046] When CBz > CBzy, it indicates that a sudden increase in the flow rate of the hot fluid has occurred, and a reverse adjustment signal is generated and sent to the adjustment module.

[0047] When CBz=CBzy, it indicates that the heat exchange is currently operating normally and no signal is generated.

[0048] The adjustment module receives positive and negative adjustment signals and executes the corresponding actions:

[0049] When a positive adjustment signal is received, the electric regulating valve controlling the fluid heater will increase the flow rate, thereby increasing the flow rate supplied through the hot water inlet 16 until CBz=CBzy;

[0050] Upon receiving a reverse adjustment signal, the electric regulating valve controlling the fluid heater will reduce the flow rate, thereby reducing the flow rate supplied through the hot water inlet 16 until CBz = CBzy.

[0051] The operating principle of the balanced temperature control system of the present invention is as follows:

[0052] When the cold fluid outlet temperature of the plate fluid heater fluctuates significantly, the temperature sensor on the temperature control heat exchange component triggers the operation control. The parameter detection module then obtains the current cold fluid flow rate. Based on the cold fluid flow rate, temperature difference, and specific heat capacity, the current complex fault type is determined, and the following actions are taken:

[0053] Action 1: If the heater malfunctions or is damaged, guide the staff to repair the heater by directly cutting off the flow and stopping operation;

[0054] Action 2: If the heater is not damaged, the current heat exchange capacity is compared with the system's preset heat exchange threshold, and the flow rate of the hot water inlet 16 is controlled by the electric regulating valve. This allows the heater to adjust its temperature in the reverse direction based on the change in heat exchange capacity, ensuring that the heater can cope with complex faults and make targeted adjustments, thus avoiding the problem of large fluctuations in outlet temperature affecting product quality.

[0055] In summary, the system can enhance fluid heating by using cross-connected hot and cold fluid channels. In practical applications, it can control the heating effect by regulating the flow rate of the hot and cold fluids, improving heat exchange efficiency by modifying the fluid flow method based on the influence of flow rate on heat exchange. Furthermore, the balanced temperature control system can trigger operation control via a temperature sensor when there are large fluctuations in the cold fluid outlet temperature. It comprehensively judges the current complex fault type by considering the current cold fluid flow rate, temperature difference, and specific heat capacity, and adopts corresponding flow control. This allows the heater to adjust its temperature inversely based on changes in heat exchange, ensuring that the heater can cope with complex faults and make targeted adjustments, avoiding the problem of large outlet temperature fluctuations affecting product quality.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A plate fluid heater with a temperature control system, comprising a temperature control heat exchange assembly, characterized in that, The temperature control heat exchange assembly includes a plate 1 (10) and a plate 2 (11) installed alternately in the front side plate (1) and the rear side plate (2). A sealing gasket layer 1 (12) and a sealing gasket layer 2 (13) are respectively installed on the same side of the plate 1 (10) and the plate 2 (11). Corrugations 1 (14) and 2 (15) are respectively provided on the plate 1 (10) and the plate 2 (11) corresponding to the sealing gasket layer 1 (12) and the sealing gasket layer 2 (13). The temperature control heat exchange component is also connected to a balanced temperature control system, which includes a processor, a parameter detection module, a distribution analysis module, and an execution adjustment module that are connected to each other. The parameter detection module is used to obtain the comprehensive value of parameter changes of the cold fluid in the temperature control heat exchange component of the heater per unit time, and send the comprehensive value of parameter changes CBz to the adjustment and analysis module via the processor; The allocation analysis module compares and analyzes the preset parameter change threshold CBzy and the comprehensive parameter change value CBz in the processor to generate positive and negative adjustment signals, and sends the generated positive and negative adjustment signals to the execution adjustment module. The adjustment module receives positive and negative adjustment signals and executes the corresponding actions.

2. The plate fluid heater with a temperature control system according to claim 1, characterized in that, The comparative analysis process performed by the allocation analysis module is as follows: when CBz < CBzy, it indicates that a sudden drop in the flow rate of the hot fluid has occurred, and a positive adjustment signal is generated and sent to the execution adjustment module; when CBz > CBzy, it indicates that a sudden increase in the flow rate of the hot fluid has occurred, and a reverse adjustment signal is generated and sent to the execution adjustment module; when CBz = CBzy, it indicates that the heat exchange is operating normally and no signal is generated.

3. The plate fluid heater with a temperature control system according to claim 1, characterized in that, A frame plate (3) for sealing plate one (10) and plate two (11) is installed between the front side plate (1) and the rear side plate (2) on the adjacent side. A hot water inlet pipe (4), a hot water outlet pipe (7), a fluid inlet pipe (5) and a fluid outlet pipe (6) are respectively installed on the frame plate (3) near the front side plate (1).

4. The plate fluid heater with a temperature control system according to claim 3, characterized in that, The plate one (10) has a hot water inlet hole (16) and a hot water outlet hole (17) in the part corresponding to the hot water inlet pipe (4) and the hot water outlet pipe (7), and the plate two (11) has a fluid inlet hole (19) and a fluid outlet hole (18) in the part corresponding to the fluid inlet pipe (5) and the fluid outlet pipe (6).

5. The plate fluid heater with a temperature control system according to claim 4, characterized in that, A connecting gasket (20) is installed on the portion of the adjacent plate one (10) or plate two (11) near the sealing gasket one (12) or sealing gasket two (13) and corresponding to the hot water inlet (16), hot water outlet (17), fluid inlet (19) and fluid outlet (18).

6. The plate fluid heater with a temperature control system according to claim 5, characterized in that, The thickness of the connecting gasket (20) is the same as the thickness of the sealing gasket layer one (12) and the sealing gasket layer two (13), and the thickness of the plate one (10) and the plate two (11) is also the same.

7. The plate fluid heater with a temperature control system according to claim 2, characterized in that, The first plate (10) and the second plate (11) are equipped with flow meters and temperature sensors for the hot water inlet (16), hot water outlet (17), fluid inlet (19) and fluid outlet (18).

8. The plate fluid heater with a temperature control system according to claim 4, characterized in that, The front side plate (1) and the rear side plate (2) are equipped with fixed crossbars (8) that are inserted into the ends of each plate one (10) and plate two (11). The upper and lower ends of each plate one (10) and plate two (11) are equipped with locking rods (9) that are connected to the front side plate (1) and the rear side plate (2).

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