Heat exchange system for high-temperature condensed water

Abstract

The utility model discloses a heat exchange system for high-temperature condensed water. The heat exchange system at least comprises at least one heat exchange cavity, the high-temperature pipeline is arranged in the heat exchange cavity; the low-temperature pipeline and the high-temperature pipeline are arranged in the heat exchange cavity at intervals; the cooling gas input pipeline is used for outputting cooling gas into the low-temperature pipeline; the high-temperature condensed water input pipeline is used for outputting high-temperature condensed water into the high-temperature pipeline; the refrigerant is filled in the heat exchange cavity between the high-temperature pipeline and the low-temperature pipeline; the low-temperature pipeline is used for outputting cooling gas into the cooling gas output pipeline; the high-temperature condensed water output pipeline outputs high-temperature condensed water into the high-temperature condensed water output pipeline; and the measuring instrument is arranged on the high-temperature condensed water output pipeline. By means of the heat exchange system for the high-temperature condensed water, the heat exchange system can operate stably and continuously for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment technical field, concretely relates to a heat exchange system of high temperature condensate. BACKGROUND

[0002] The water quality of high temperature condensate is good, close to desalted water, and almost has no dissolved oxygen and carbon dioxide gas, so that it can be recycled and recycled to save water resources and improve energy recovery efficiency. Before recycling and recycling, the water quality of high temperature condensate needs to be heat exchanged by means of a heat exchange system to determine whether it meets the requirements of recycling. However, the pressure and flow of high temperature condensate are unstable, and have a high temperature, if directly entering the heat exchange system, the equipment in the system will frequently malfunction, resulting in that the system cannot be stably and continuously operated for a long time. SUMMARY

[0003] The utility model discloses a heat exchange system of high temperature condensate, which can prolong the service life of the heat exchange system, so that the heat exchange system can be stably, continuously and long-term operated.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model is realized by the following technical scheme.

[0005] The utility model provides a heat exchange system of high temperature condensate, at least comprising:

[0006] At least one heat exchange cavity;

[0007] High temperature pipeline is arranged in the heat exchange cavity;

[0008] Low temperature pipeline is arranged in the heat exchange cavity and is spaced apart from the high temperature pipeline;

[0009] Cooling gas input pipeline outputs cooling gas into the low temperature pipeline;

[0010] High temperature condensate input pipeline outputs high temperature condensate into the high temperature pipeline;

[0011] Refrigerant is filled in the heat exchange cavity between the high temperature pipeline and the low temperature pipeline;

[0012] Cooling gas output pipeline, the low temperature pipeline outputs cooling gas into the cooling gas output pipeline;

[0013] High temperature condensate output pipeline, the high temperature pipeline outputs high temperature condensate into the high temperature condensate output pipeline; and

[0014] Measurement instrument is arranged on the high temperature condensate output pipeline.

[0015] In one embodiment of this utility model, there are two heat exchange cavities, including a first cavity and a second cavity. The inlet of the high-temperature pipeline in the first cavity is connected to the high-temperature condensate input pipeline, and the outlet is connected to the high-temperature pipeline in the second cavity.

[0016] In one embodiment of this utility model, the number of cooling gas input pipes is equal to the number of heat exchange cavities, and the low-temperature pipeline in each heat exchange cavity is connected to one cooling gas input pipe.

[0017] In one embodiment of this utility model, the high-temperature condensate output pipeline includes a first output pipeline and a second output pipeline. The first output pipeline connects the high-temperature pipeline in the first cavity and the second cavity, and the second output pipeline is connected to the outlet of the high-temperature pipeline in the second cavity.

[0018] In one embodiment of this utility model, the measuring instrument is mounted on the second output pipe.

[0019] In one embodiment of the present invention, the heat exchange system further includes a refrigeration element, which is disposed on the cooling gas input pipe.

[0020] In one embodiment of the present invention, the heat exchange system further includes a pressure reducing valve, which is disposed on the cooling gas input pipe on the side of the refrigeration element away from the heat exchange cavity.

[0021] In one embodiment of the present invention, the heat exchange system further includes a first temperature detector, which is internally connected to the heat exchange cavity.

[0022] In one embodiment of the present invention, the heat exchange system further includes a second temperature detector, which is disposed on the high-temperature condensate output pipe on the side of the measuring instrument near the heat exchange cavity.

[0023] In one embodiment of the present invention, the heat exchange system further includes at least one flow control valve, which is disposed on the high-temperature condensate input pipe.

[0024] In summary, this invention proposes a heat exchange system for high-temperature condensate, which enables the system to operate stably, continuously, and for extended periods, reducing the frequency of equipment failures and extending the system's lifespan. Furthermore, the high-temperature condensate heat exchange system provided by this invention can recover heat from the condensate, thus avoiding heat waste, improving energy utilization, and providing a reference for heat exchange between different phases.

[0025] Of course, any implementation of the present application does not necessarily need to achieve all the advantages mentioned above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 FIG. 1 is a schematic diagram of a heat exchange system for high-temperature condensate water in an embodiment of the present application.

[0028] Figure 2 FIG. 2 is a running trend diagram of a measuring instrument using the heat exchange system provided in the present application.

[0029] Label Description:

[0030] 11, heat exchange cavity; 111, first cavity; 112, second cavity; 12, cooling gas input pipeline; 121, pressure reducing valve; 122, refrigeration element; 13, high-temperature condensate water input pipeline; 131, first control valve; 132, second control valve; 14, cooling gas output pipeline; 15, high-temperature condensate water output pipeline; 151, first output pipeline; 152, second output pipeline; 16, measuring instrument; 17, first temperature detector; 18, second temperature detector; 19, detection cavity; 20, sensor. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described below through specific concrete examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present specification. The present application can also be implemented or applied through other different concrete embodiments, and each detail in the present application can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The actual implementation of each component can be randomly changed in shape, number and proportion, and the layout pattern of the components can also be more complex.

[0033] In the utility model, it needs to explain, if appearing the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and the like, the indicated orientation or position relation is based on the orientation or position relation shown in the drawing, is only for the convenience of describing the present application and simplifying the description, and is not indicated or implied that the indicated device or element must have a particular orientation, is constructed and operated in a particular orientation, therefore cannot be understood as the limitation to the present application. In addition, if appearing the term "first", "second" is only used for the description and the differentiation purpose, and cannot be understood as indicating or implying the relative importance.

[0034] Please refer to Figures 1 to 2 As shown in the utility model provides a kind of heat exchange system of high temperature condensate, for example including heat exchange cavity 11, cooling gas input pipeline 12, high temperature condensate input pipeline 13, cooling gas output pipeline 14, high temperature condensate output pipeline 15 and measuring instrument 16 etc..Wherein, heat exchange cavity 11 is arranged in high temperature pipeline and low temperature pipeline, cooling gas input pipeline 12 exports cooling gas to low temperature pipeline, and cooling gas in low temperature pipeline is exported to cooling gas output pipeline 14, high temperature condensate input pipeline 13 exports high temperature condensate to high temperature pipeline, and high temperature condensate in high temperature pipeline is exported to high temperature condensate output pipeline 15, refrigerant is filled in heat exchange cavity 11 between high temperature pipeline and low temperature pipeline, measuring instrument 16 is arranged on high temperature condensate output pipeline 15.In the heat exchange system of high temperature condensate provided in the utility model, cooling gas in low temperature pipeline and high temperature condensate in high temperature pipeline carry out heat exchange between different phase states in heat exchange cavity 11, high temperature condensate is cooled, meets the sample requirement of measuring instrument 16, to flow through measuring instrument 16 on high temperature condensate output pipeline 15, measuring instrument 16 detects and analyzes the high temperature condensate after being cooled, to be able to reduce the failure frequency of measuring instrument 16, guarantee that entire heat exchange system can be stably, continuously and long-term operated.Moreover, cooling gas in low temperature pipeline is heated by high temperature condensate, to realize the recovery of heat in high temperature condensate, improve energy utilization rate.

[0035] Please refer to Figure 1As shown in the utility model one embodiment, heat exchange cavity 11 as high temperature medium and low temperature medium heat transfer place. Among them, heat exchange cavity 11 for example is one of shell and tube heat exchanger, plate heat exchanger, spiral plate heat exchanger or finned tube heat exchanger etc. partition wall heat exchanger, to avoid high temperature medium and low temperature medium direct contact, mixed. Specifically, heat exchange cavity 11 for example set up high temperature pipeline (not shown in the drawing) and low temperature pipeline (not shown in the drawing), high temperature pipeline and low temperature pipeline interval setting in heat exchange cavity 11, high temperature medium in high temperature pipeline and low temperature medium in low temperature pipeline heat transfer. In the embodiment, high temperature pipeline and low temperature pipeline for example interval setting in the form of spiral, to increase the surface area occupied by high temperature pipeline and low temperature pipeline, improve heat transfer efficiency.

[0036] Please refer to Figure 1 As shown in the utility model one embodiment, in heat exchange cavity 11, high temperature medium in high temperature pipeline and low temperature medium in low temperature pipeline heat exchange. In the embodiment, high temperature medium for example is high temperature condensate, low temperature medium for example is instrument air, and high temperature condensate and instrument air heat exchange in heat exchange cavity 11 between different same, reach high temperature condensate is cooled, and instrument air is heated purpose, to be able to in the condition of no same phase state high temperature medium and low temperature medium, realize heat exchange between different phase states.

[0037] Please refer to Figure 1 As shown in the utility model one embodiment, heat exchange cavity 11 for example is at least one, when heat exchange cavity 11 for example is multiple, multiple heat exchange cavities 11 interval setting, and the high temperature pipeline between two adjacent heat exchange cavities 11 in connection setting, the high temperature medium in high temperature pipeline in the previous heat exchange cavity 11 after cooling, continue to flow into the high temperature pipeline in the next heat exchange cavity 11 and be cooled, to avoid the emergence of a single heat exchange cavity 11 cannot cool the high temperature medium in high temperature pipeline to the preset temperature condition. In the embodiment, with heat exchange cavity 11 for example two, to heat exchange system is explained. Specifically, two heat exchange cavities 11 for example are first cavity 111 and second cavity 112 etc., first cavity 111 and second cavity 112 interval setting, and first cavity 111 and second cavity 112 each are provided with high temperature pipeline and low temperature pipeline, and the high temperature pipeline in first cavity 111 and the high temperature pipeline in second cavity 112 connection setting.

[0038] Please refer to Figure 1As shown in the utility model one embodiment, cooling gas input pipeline 12 output cooling gas to the low temperature pipeline in heat exchange cavity 11, as low temperature medium, the high temperature medium in high temperature pipeline is cooled, and itself is heated. Among them, the cooling gas is, for example, instrument air, etc., and the instrument air is heated in the heat exchange cavity 11 by high temperature medium, not only can recover the heat in high temperature medium, but also can directly send the heated instrument air into instrument system and use. Specifically, the number of cooling gas input pipeline 12 is equal to the number of heat exchange cavity 11. In the embodiment, the cooling gas input pipeline 12 is two, for example, the low temperature pipeline in the first cavity 111 is connected with one cooling gas input pipeline 12, and the low temperature pipeline in the second cavity 112 is connected with another cooling gas input pipeline 12.

[0039] Please refer to Figure 1 As shown in the utility model one embodiment, cooling gas input pipeline 12 is provided with refrigeration element 122, to cool the gas transmitted in cooling gas input pipeline 12, and then send into the low temperature pipeline in heat exchange cavity 11.

[0040] Please refer to Figure 1 As shown in the utility model one embodiment, cooling gas input pipeline 12 on the side of refrigeration element 122 away from heat exchange cavity 11 is also provided with pressure reducing valve 121. Among them, the pressure reducing valve 121 is, for example, air filter pressure reducing valve, etc. By setting pressure reducing valve 121, the pressure of cooling gas in cooling gas input pipeline 12 is reduced to a preset value, the amount of cooling gas in cooling gas input pipeline 12 sent into the low temperature pipeline can be changed by adjusting the pressure of cooling gas, so as to control the temperature of cooling gas heated in heat exchange cavity 11, to control the heat exchange process in heat exchange cavity 11.

[0041] Please refer to Figure 1As shown in the utility model one embodiment, high temperature condensate water input pipeline 13 output high temperature condensate water to the high temperature pipeline in heat exchange cavity 11, as high temperature medium, low temperature gas in low temperature pipeline is heated, and itself is cooled down.Specifically, in this embodiment, high temperature condensate water input pipeline 13 is connected with the high temperature pipeline in first cavity 111, and the temperature of high temperature condensate water is for example 102 ℃-110 ℃, and the pressure is for example 0.15 MPa-0.2 MPa.Because high temperature condensate water has higher temperature, if directly entering measuring instrument 16 for detection analysis, can cause measuring instrument 16 to frequently break down, therefore, in the application, by setting heat exchange cavity 11, high temperature condensate water input pipeline 13 transports high temperature condensate water to the high temperature pipeline, and the low temperature gas in low temperature pipeline is transported to cooling gas input pipeline 12 and exchanges heat, and high temperature condensate water is cooled down and then sent into measuring instrument 16 for detection analysis, thereby reducing the failure frequency of measuring instrument 16, so that the whole heat exchange system can long-term, stable and continuous operation.

[0042] Please refer to Figure 1 As shown in the utility model one embodiment, at least one flow control valve is arranged on high temperature condensate water input pipeline 13 to adjust the flow of high temperature condensate water in high temperature condensate water input pipeline 13 transported to the high temperature pipeline in heat exchange cavity 11, so as to control the temperature of high temperature condensate water cooled in heat exchange cavity 11, to achieve the purpose of controlling the heat exchange process in heat exchange cavity 11.In this embodiment, the flow control valve is for example two, and the two flow control valves include for example first control valve 131 and second control valve 132, etc., the first control valve 131 is arranged on high temperature condensate water input pipeline 13, and the second control valve 132 is arranged on high temperature condensate water input pipeline 13 between first control valve 131 and heat exchange cavity 11, and the first control valve 131 and the second control valve 132 are for example respectively needle valve, ball valve or gate valve, etc..By setting first control valve 131 and second control valve 132, the flow of high temperature condensate water flowing into the high temperature pipeline in heat exchange cavity 11 can be two-stage adjusted, so as to accurately control the flow of high temperature condensate water, to achieve the purpose of fine adjustment of the heat exchange process in heat exchange cavity 11.Moreover, the pressure and flow of high temperature condensate water transmitted in high temperature condensate water input pipeline 13 can be stabilized, and then the pressure and flow of high temperature condensate water flowing into measuring instrument 16 tend to be stable, that is, the sample of measuring instrument 16 is stable, thereby prolonging the service life of measuring instrument 16 and improving the stability of the whole heat exchange system operation.

[0043] Please refer to Figure 1As shown, in one embodiment of this invention, refrigerant is filled in the heat exchange cavity 11 between the high-temperature pipeline and the low-temperature pipeline. In this embodiment, refrigerant is provided between the high-temperature pipeline and the low-temperature pipeline in both the first cavity 111 and the second cavity 112 to increase the cooling capacity within the heat exchange cavity 11 and improve the cooling effect and efficiency of the high-temperature condensate within the heat exchange cavity 11. The refrigerant includes, for example, at least one of propane, isobutane, and dichloromethane.

[0044] Please see Figure 1 As shown, in one embodiment of this utility model, the heat exchange system further includes a first temperature detector 17, which is internally connected to the heat exchange chamber 11. The number of first temperature detectors 17 is, for example, equal to the number of heat exchange chambers 11. In this embodiment, for example, there are two first temperature detectors 17, one connected to each of the first chamber 111 and the second chamber 112, to detect the temperature of the refrigerant in the first chamber 111 and the second chamber 112. When the first temperature detector 17 detects that the temperature of the refrigerant in the chamber is too high, it promptly replenishes or replaces the refrigerant to ensure sufficient cooling capacity within the chamber, enabling the high-temperature condensate to be cooled to a preset temperature.

[0045] Please see Figure 1 As shown, in one embodiment of this invention, the cooling gas output pipe 14 is connected to the outlet of the low-temperature pipeline inside the heat exchange chamber 11. Specifically, the cooling gas input pipe 12 delivers cooling gas to the low-temperature pipeline inside the heat exchange chamber 11, where it exchanges heat with the high-temperature condensate in the high-temperature pipeline. After being heated, the cooling gas flows out of the heat exchange chamber 11 from the cooling gas output pipe 14. The number of cooling gas output pipes 14 is equal to the number of heat exchange chambers 11. In this embodiment, for example, there are two cooling gas output pipes 14. The outlet of the low-temperature pipeline in the first chamber 111 is connected to one cooling gas output pipe 14, and the outlet of the low-temperature pipeline in the second chamber 112 is connected to the other cooling gas output pipe 14, so that the heated cooling gas in the two chambers can be extracted from the heat exchange system for reuse.

[0046] Please see Figure 1As shown, in an embodiment of the present application, the high-temperature condensate output pipeline 15 is connected with the outlet of the high-temperature pipeline in the heat exchange cavity 11. Specifically, the high-temperature condensate input pipeline 13 delivers the high-temperature condensate into the high-temperature pipeline in the heat exchange cavity 11, exchanges heat with the cooling gas in the low-temperature pipeline, and the high-temperature condensate is cooled and flows out of the heat exchange cavity 11 from the high-temperature condensate output pipeline 15. The number of the high-temperature condensate output pipeline 15 is equal to the number of the heat exchange cavity 11, for example. In this embodiment, the high-temperature condensate output pipeline 15 is two, for example, including a first output pipeline 151 and a second output pipeline 152, and the first output pipeline 151 is connected with the high-temperature pipeline in the first cavity 111 and the high-temperature pipeline in the second cavity 112, and the second output pipeline 152 is connected with the outlet of the high-temperature pipeline in the second cavity 112. Specifically, the high-temperature condensate in the high-temperature condensate input pipeline 13 is cooled in the high-temperature pipeline in the first cavity 111, and then is sent into the high-temperature pipeline in the second cavity 112 through the first output pipeline 151, and is further cooled by the cooling gas in the low-temperature pipeline in the second cavity 112, and then flows out of the second cavity 112 from the second output pipeline 152, so as to realize two-stage cooling of the high-temperature condensate, and the temperature of the cooled high-temperature condensate can reach the preset temperature, so as to meet the sampling requirement of the measuring instrument 16. The preset temperature is 40-45℃, for example.

[0047] Please refer to Figure 1 As shown, in an embodiment of the present application, the measuring instrument 16 is arranged on the high-temperature condensate output pipeline 15. Specifically, the measuring instrument 16 is arranged on the second output pipeline 152, for example, and the measuring instrument 16 is a dissolved oxygen analyzer or a dissolved carbon dioxide analyzer, for example, so as to detect the content of the dissolved oxygen or the dissolved carbon dioxide in the high-temperature condensate. If the high-temperature condensate in the high-temperature condensate input pipeline 13 is directly sent into the measuring instrument 16, the measuring instrument 16 will frequently malfunction due to the high temperature of the high-temperature condensate, and in this embodiment, the high-temperature condensate is cooled to the preset temperature by the heat exchange cavity 11, and then flows out of the heat exchange cavity 11 from the second output pipeline 152, and the measuring instrument 16 measures and analyzes the cooled high-temperature condensate, so as to reduce the malfunction frequency of the measuring instrument 16, and ensure that the whole heat exchange system can be stably, long-term and continuously operated.

[0048] Please refer to Figure 1As shown, in one embodiment of this utility model, a second temperature detector 18 is installed on the high-temperature condensate output pipe 15 near the heat exchange chamber 11 of the measuring instrument 16. Specifically, the second temperature detector 18 is installed, for example, on the second output pipe 152 between the second chamber 112 and the measuring instrument 16. By installing the second temperature detector 18, the temperature of the high-temperature condensate flowing in the second output pipe 152 can be detected to confirm whether the temperature of the high-temperature condensate after being cooled by the heat exchange chamber 11 meets the sample injection requirements of the measuring instrument 16.

[0049] Please see Figure 1 As shown, in one embodiment of this utility model, a detection chamber 19 is provided on the second output pipe 152 between the second temperature detector 18 and the measuring instrument 16, and the measuring instrument 16 is internally connected to the detection chamber 19. The detection chamber 19 is used to collect cooled high-temperature condensate. When the measuring instrument 16 detects that the water quality of the high-temperature condensate in the detection chamber 19 is qualified, the high-temperature condensate can be reused; otherwise, the high-temperature condensate enters a water treatment device for processing.

[0050] Please see Figure 1 As shown, in one embodiment of this utility model, the heat exchange system further includes a sensor 20, which is communicatively connected to a measuring instrument 16 to transmit the measurement data of the measuring instrument 16 to a distributed control system (DCS). The DCS collects and monitors the measurement data in real time, thereby achieving the purpose of real-time monitoring of the temperature of the cooled high-temperature condensate.

[0051] Please see Figures 1 to 2 As shown, after using the heat exchange system provided in this application, the measured value of the measuring instrument 16 fluctuates stably within a small range as the heat exchange system operates, thus indicating that the operating trend of the measuring instrument 16 is relatively stable through the heat exchange system provided in this application, thereby enabling stable, long-term and continuous analysis of the water quality of high-temperature condensate.

[0052] In summary, this invention proposes a heat exchange system for high-temperature condensate. By cooling the high-temperature condensate in a heat exchange chamber before sending it into the measuring instrument, the system can reduce the frequency of instrument malfunctions, ensure stable, long-term, and continuous operation of the heat exchange system, and recover heat from the high-temperature condensate, thus improving energy efficiency. Furthermore, the heat exchange system provided by this invention, through heat exchange between high-temperature condensate and instrument gas, can provide a reference for heat exchange between different phases.

[0053] References to "one embodiment", "an embodiment", or "the embodiments" throughout the specification, mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application, and is not necessarily included in all embodiments. Thus, the various appearances of the phrases "in one embodiment", "in an embodiment", or "in a specific embodiment" in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It will be appreciated that, except where otherwise indicated, aspects described herein can be implemented in any combination of hardware and software. It will be appreciated that any of the examples, or examples described, can be implemented using one or more computers or devices and that the described examples are not limited to any particular type of computer or device.

[0054] The above description is only preferred embodiments of the present application and the explanation of the technical principles used, and those skilled in the art should understand that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combination of the technical features described above or their equivalent features without departing from the concept of the application. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions. In addition to the technical features described in the specification, the remaining technical features are known to those skilled in the art, and in order to highlight the innovative features of the present application, the remaining technical features will not be described here.

Claims

1. A high temperature condensate heat exchange system, characterized by, At least comprising: at least one heat exchange cavity; a high-temperature pipeline arranged in the heat exchange cavity; a low-temperature pipeline arranged in the heat exchange cavity and spaced apart from the high-temperature pipeline; a cooling gas input pipe that outputs cooling gas into the low-temperature pipeline; a high-temperature condensate water input pipe that outputs high-temperature condensate water into the high-temperature pipeline; a refrigerant filled in the heat exchange cavity between the high-temperature pipeline and the low-temperature pipeline; a cooling gas output pipe into which the low-temperature pipeline outputs cooling gas; a high-temperature condensate water output pipe into which the high-temperature pipeline outputs high-temperature condensate water; and a measuring instrument arranged on the high-temperature condensate water output pipe.

2. The heat exchange system of claim 1, wherein, The heat exchange cavity is two, and the two heat exchange cavities comprise a first cavity and a second cavity, an inlet of the high-temperature pipeline in the first cavity is connected with the high-temperature condensate water input pipe, and an outlet is connected with the high-temperature pipeline in the second cavity.

3. The heat exchange system of claim 2, wherein, The number of the cooling gas input pipes is equal to the number of the heat exchange cavities, and the low-temperature pipeline in each heat exchange cavity is connected with one cooling gas input pipe.

4. The heat exchange system of claim 2, wherein, The high-temperature condensate water output pipe comprises a first output pipe and a second output pipe, the first output pipe is connected with the high-temperature pipeline in the first cavity and the second cavity, and the second output pipe is connected with the outlet of the high-temperature pipeline in the second cavity.

5. The heat exchange system of claim 4, wherein, The measuring instrument is arranged on the second output pipe.

6. The heat exchange system of claim 1, wherein, The heat exchange system further comprises a refrigeration element arranged on the cooling gas input pipe.

7. The heat exchange system of claim 6, wherein, The heat exchange system further comprises a pressure reducing valve arranged on the cooling gas input pipe on the side away from the heat exchange cavity of the refrigeration element.

8. The heat exchange system of claim 1, wherein, The heat exchange system further comprises a first temperature detector connected with the inside of the heat exchange cavity.

9. The heat exchange system of claim 1, wherein, The heat exchange system further comprises a second temperature detector arranged on the high-temperature condensate water output pipe on the side close to the heat exchange cavity of the measuring instrument.

10. The heat exchange system of claim 1, wherein, The heat exchange system further comprises at least one flow control valve arranged on the high-temperature condensate water input pipe.

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