A waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry

Abstract

This application discloses a waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry, including pipe groups, a monitoring mechanism, and a heat exchange mechanism. The pipe groups include a heat medium pipe group and a cold medium pipe group. The monitoring mechanism is connected to the pipe groups. Both the cold medium pipe group and the heat medium pipe group are connected to the heat exchange mechanism, which includes a heat medium channel, a cold medium channel, and a driving mechanism. The cold medium channel and the heat medium channel are in contact, and the cold medium channel is filled with cold medium. The heat medium channels are distributed around the cold medium channels, and the heat medium channels are filled with heat medium. The heat medium channels are equipped with driving mechanisms that drive the heat medium to rotate around the cold medium channels. In this application, the heat medium circulates around the cold medium within the heat medium channels, thereby increasing the contact time between the cold and heat medium, improving the efficiency of heat transfer, and avoiding the problem of impurity deposition caused by slow flow rate.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat utilization, specifically relating to a waste heat utilization system for low-pressure flash distillation black water in coal chemical industry. Background Technology

[0002] Coal chemical processing includes two processes: low-pressure flash evaporation and high-pressure flash evaporation. Both processes generate a large amount of high-temperature wastewater. In order to save resources and respond to environmental protection, after the high-temperature wastewater is discharged, heat exchangers are usually used to heat the remaining cold medium that needs to be heated, so as to utilize its residual heat energy and form a secondary utilization of resources.

[0003] "Black water" is a type of wastewater generated during coal chemical processing. It has a high impurity content, and the impurities are relatively large. In the low-pressure flash evaporation process, the pressure inside the container is low, and the flow rate of the discharged wastewater slows down after desorption in the vacuum flash tank. Therefore, when using conventional heat exchangers to utilize the waste heat of black water, the characteristics of large particles and the slow flow rate easily cause impurities to accumulate and adhere to the inner wall of the heat exchanger, accelerating scale formation. Because black water contains a lot of impurities and has low heat exchange efficiency, simply increasing the flow rate of black water to avoid impurity deposition will result in a short contact time between the black water and the refrigerant per unit volume, leading to low heat utilization per unit volume of black water. Therefore, it is necessary to propose a special heat exchange system based on the characteristics of low-pressure flash evaporation black water for waste heat utilization. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes a waste heat recovery system for low-pressure flash evaporation black water in coal chemical industry. Utilizing a unique heat medium channel orientation, the black water rotates at a high speed around the cold medium channel within the heat medium channel. This rotation allows the heat medium and cold medium to come into contact multiple times, thus solving the problem of impurity deposition caused by low flow velocity and avoiding the defect of low heat recovery efficiency due to short contact time.

[0005] The specific solution is as follows: a waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry, including pipe groups, monitoring mechanisms and heat exchange mechanisms;

[0006] Piping units include heat pipe units and refrigerant pipe units; monitoring units are connected to the pipe units;

[0007] Both the refrigerant pipe assembly and the heat exchanger assembly are connected to the heat exchanger mechanism, which includes a heat exchanger channel, a refrigerant channel, and a drive mechanism. The refrigerant channel and the heat exchanger channel are in contact, and the refrigerant channel is filled with refrigerant. The heat exchanger channels are distributed around the refrigerant channels, and the heat exchanger channels are filled with heat. The heat exchanger channels are equipped with a drive mechanism, which drives the heat exchanger to rotate around the refrigerant channels.

[0008] Furthermore, the heat medium channel includes a shell, within which at least two heat medium chambers are distributed circumferentially along the shell axis. The two heat medium chambers are interconnected, and a drive mechanism is provided at their intersection. A heat inlet and a heat outlet are provided at both ends of the shell perpendicular to the axial direction. A refrigerant channel runs through the shell and is distributed within the heat medium channel. Preferably, there are three to four heat medium chambers. Increasing the number of heat medium chambers will enhance the control of the heat medium by the drive mechanism, and at the same time, the position of the drive mechanism will be more uniform. Preferably, the heat inlet is located at the top of one end of the shell sidewall, and the heat outlet is located at the bottom of the other end of the shell sidewall.

[0009] Furthermore, the refrigerant passage includes a cold inlet pipe, a cold outlet pipe, and multiple heat exchange pipes;

[0010] The cold inlet pipe and the cold outlet pipe are installed through the shell, and multiple heat exchange tubes are connected to the cold inlet pipe and the cold outlet pipe respectively;

[0011] The cold inlet pipe includes a main cold inlet pipe and multiple branch cold inlet pipes. The main cold inlet pipe and the branch cold inlet pipes are connected. The main cold inlet pipe is connected to the outside of the shell, and the branch cold inlet pipes are located inside the shell.

[0012] The cold outlet pipe includes a cold outlet main pipe and multiple cold outlet branch pipes. The cold outlet main pipe and the cold outlet branch pipes are connected. The cold outlet main pipe is connected to the outside of the housing, and the cold outlet branch pipes are located inside the housing.

[0013] Multiple heat exchange tubes are evenly distributed in each heat medium compartment, and the heat exchange tubes are connected to the cold inlet branch pipe and the cold outlet branch pipe respectively. This structure makes the heat exchange area larger, the heat exchange efficiency higher and the heat exchange more uniform. Multiple heat exchange tubes can also be distributed in the same hot coal compartment.

[0014] Furthermore, multiple heat exchange tubes are distributed circumferentially along the axial direction of the shell. The heat exchange tubes are a network structure formed by interwoven small pipes, and the heat exchange tubes are set perpendicular to the direction of heat medium flow. The network of heat exchange tubes does not easily hinder the circulation of heat medium, while also increasing the heat exchange area between the refrigerant and the heat medium. However, the diameter of the small pipes should not be too small to avoid blockage of the pipes after internal scaling. Preferably, the heat exchange tubes are detachably connected to the cold inlet and cold outlet pipes, which facilitates the replacement of the heat exchange tubes.

[0015] Furthermore, the drive mechanism includes at least one drive pump, and the heat medium chambers are separated by guide plates. Each guide plate is equipped with a drive pump, which drives the heat medium to rotate clockwise or counterclockwise. In the direction of heat medium rotation, the heat medium chamber that can be driven by gravity may not be equipped with a drive pump, and the rotation of the heat medium can be achieved by gravity.

[0016] Furthermore, the heat medium storage is equipped with at least one partition to divide the heat medium storage into multiple sections, and each section is interconnected. The partition is equipped with a conveying mechanism, which is a pump that transports the hot coal to the next section. The conveying mechanism between each section is set on the partition of the heat medium storage above the heat medium storage with the heat medium storage containing the heat medium as the base point and in the opposite direction of heat medium rotation.

[0017] After the baffles separate the heat medium compartments, the heat medium driven by the drive mechanism is hindered from moving axially by the baffles, which makes the drive process smoother and more conducive to the drive mechanism. Each baffle is equipped with a conveying mechanism for connecting compartment sections, and the flow rate of the conveying mechanism can also be controlled, further improving the precision of flow rate control.

[0018] Furthermore, the housing is equipped with a viewing valve, which is connected to the heat medium chamber. A cleaning mechanism is connected to the outside of the viewing valve. When the viewing valve is opened, the cleaning mechanism extends into the heat medium chamber for cleaning. The cleaning mechanism includes a cleaning scraper, which is hollow inside and connected to a water gun. When the viewing valve is opened, the cleaning scraper is inserted into it to clean the small amount of impurities inside the housing.

[0019] Furthermore, the monitoring mechanism includes a temperature monitoring device, a flow rate monitoring device, and a flow rate control device; the temperature monitoring device is preferably a thermometer, the flow rate monitoring device is preferably a flow meter, and the flow rate control device is preferably a flow pump.

[0020] Refrigerant piping assembly includes refrigerant delivery piping and refrigerant outlet piping; heat transfer piping assembly includes heat transfer piping and heat transfer outlet piping.

[0021] The refrigerant delivery pipe, refrigerant outlet pipe, and heat transfer pipe are all equipped with temperature monitoring devices and flow rate monitoring devices;

[0022] The refrigerant delivery pipe, the heat transfer pipe, and the heat output pipe are all equipped with flow rate control components.

[0023] Furthermore, the flow velocity in the refrigerant channel is less than that in the heat medium channel. Those skilled in the art will understand that this application has a corresponding control system to control each drive pump, conveying mechanism, and flow rate control component. When the heat medium just enters the heat medium channel, the power of the flow rate control component in the heat medium conveying pipe and the conveying mechanism at the baffle position can be increased to allow the heat medium to quickly contact the refrigerant channel, ensuring uniform heating of the refrigerant. After the heat medium flows out of the heat medium outlet pipe, the power of the flow rate control component at the heat medium conveying pipe and the heat medium outlet pipe can be reduced accordingly. Simultaneously, the power of the conveying mechanism at the baffle is adjusted to match the flow rate of the flow rate control component at the heat medium conveying pipe, thereby reducing the inlet and outlet flow rates of the heat medium. Then, the power of the drive mechanism at the guide plate is increased to increase the rotational flow rate of the heat medium, thus preventing impurity deposition. Simultaneously, during the heat exchange process, the values ​​of the temperature monitoring components must be referenced to adjust the inlet and outlet flow rates of the heat medium.

[0024] Furthermore, it also includes a second heat exchange mechanism, which is connected to the refrigerant pipe group and the heat pipe group. When the heat exchange mechanism is cleaned or damaged, the second heat exchange mechanism serves as a backup.

[0025] The beneficial effects of this utility model are as follows:

[0026] (1) The waste heat utilization system of this application makes the heat medium circulate around the cold medium channel in the heat medium channel, thereby increasing the contact time between the cold medium and the heat medium, improving the heat utilization rate, and avoiding the problem of impurity deposition caused by slow flow rate.

[0027] (2) The waste heat utilization system of this application increases the flow rate of the heat medium, making it difficult for impurities to accumulate, and at the same time increases the flushing force of black water on the inner wall of the heat exchanger, making it difficult for scale to form inside the heat exchanger.

[0028] (3) In the heat exchange process of the waste heat utilization system of this application, the heat medium wraps the cold medium and rotates, so that the cold medium is heated evenly and the local overheating of the cold medium is avoided. Attached Figure Description

[0029] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0031] Figure 2 This is a top-view perspective view of an embodiment of the present utility model;

[0032] Figure 3 This is a side sectional view of an embodiment of the present utility model;

[0033] Figure 4 This is a front cross-sectional view of an embodiment of the present utility model;

[0034] Figure 5 This is a schematic diagram of the heat exchange tube structure according to an embodiment of the present invention;

[0035] In the attached diagram: 1-Heat exchange mechanism, 11-Heat medium channel, 111-Shell, 112-Heat medium chamber, 113-Baffle plate, 114-Section section, 115-Baffle plate, 116-Heat inlet, 117-Inspection valve, 118-Heat outlet, 12-Refrigerant channel, 121-Cold inlet pipe, 122-Cold outlet pipe, 123-Heat exchange pipe, 13-Drive mechanism, 14-Conveying mechanism, 21-Heat medium pipe assembly, 211-Heat medium conveying pipe, 212-Heat medium output pipe, 22-Refrigerant pipe assembly, 221-Refrigerant conveying pipe, 222-Refrigerant output pipe, 3-Monitoring mechanism, 31-Temperature monitoring element, 32-Flow rate monitoring element, 33-Flow rate control element. Detailed Implementation

[0036] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0038] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0041] In one embodiment, such as Figures 1-5 As shown, a waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry includes pipe groups, a monitoring mechanism 3 and a heat exchange mechanism 1.

[0042] The piping system includes a heat transfer fluid piping system 21 and a refrigerant piping system 22; the monitoring unit 3 is connected to the piping system.

[0043] Both the refrigerant pipe assembly 22 and the heat medium pipe assembly 21 are connected to the heat exchange mechanism 1. The heat exchange mechanism 1 includes a heat medium channel 11, a refrigerant channel 12, and a drive mechanism 13. The refrigerant channel 12 and the heat medium channel 11 are in contact, and the refrigerant is flowing through the refrigerant channel 12. The heat medium channel 11 is distributed around the refrigerant channel 12, and the heat medium is flowing through the heat medium channel 11. The heat medium channel 11 is equipped with a drive mechanism 13, which drives the heat medium to rotate around the refrigerant channel 12.

[0044] Preferably, the heat exchange mechanism 1 has a rectangular outer shape for easy fixation and support, and an internal cylindrical cavity with no dead corners to prevent the accumulation of impurities.

[0045] In one specific embodiment, the heat medium channel 11 includes a housing 111, and at least two heat medium chambers 112 are distributed circumferentially along the axis of the housing 111 inside the housing 111. The two heat medium chambers 112 are interconnected and a drive mechanism 13 is provided at their intersection. A heat inlet 116 and a heat outlet 118 are provided at both ends of the housing 111 perpendicular to the axial direction. The refrigerant channel 12 passes through the housing 111 and is distributed inside the heat medium channel 11. Preferably, there are three to four heat medium chambers 112. Increasing the number of heat medium chambers 112 will enhance the control of the heat medium by the drive mechanism 13, and at the same time, the position of the drive mechanism 13 will be more uniform. Preferably, the heat inlet 116 is located at the top of one end of the side wall of the housing 111, and the heat outlet 118 is located at the bottom of the other end of the side wall of the housing 111.

[0046] In one specific embodiment, the refrigerant channel 12 includes a cold inlet pipe 121, a cold outlet pipe 122, and a plurality of heat exchange pipes 123;

[0047] The cold inlet pipe 121 and the cold outlet pipe 122 are installed through the shell 111, and multiple heat exchange pipes 123 are respectively connected to the cold inlet pipe 121 and the cold outlet pipe 122;

[0048] The cold inlet pipe 121 includes a cold inlet main pipe and multiple cold inlet branch pipes. The cold inlet main pipe and the cold inlet branch pipes are connected. The cold inlet main pipe is connected to the outside of the housing 111, and the cold inlet branch pipes are located inside the housing 111.

[0049] The cold outlet pipe 122 includes a cold outlet main pipe and multiple cold outlet branch pipes. The cold outlet main pipe and the cold outlet branch pipes are connected. The cold outlet main pipe is connected to the outside of the housing 111, and the cold outlet branch pipes are located inside the housing 111.

[0050] Multiple heat exchange tubes 123 are evenly distributed in each heat medium chamber 112, and the heat exchange tubes 123 are connected to the cold inlet branch pipe and the cold outlet branch pipe respectively; this structure makes the heat exchange area larger, the heat exchange efficiency higher and the heat exchange more uniform.

[0051] In one specific embodiment, multiple heat exchange tubes 123 are distributed circumferentially along the axial direction of the shell 111. The heat exchange tubes 123 are a network structure formed by interwoven small pipes, and the heat exchange tubes 123 are arranged perpendicular to the flow direction of the heat medium. The network of heat exchange tubes 123 does not easily hinder the circulation of the heat medium, while also increasing the heat exchange area between the refrigerant and the heat medium. However, the diameter of the small pipes should not be too small to avoid blockage of the pipes after internal scaling. Preferably, the heat exchange tubes 123 are detachably connected to the cold inlet pipe 121 and the cold outlet pipe 122, which facilitates the replacement of the heat exchange tubes 123.

[0052] In one specific embodiment, the drive mechanism 13 includes at least one drive pump. The heat medium chambers 112 are separated by guide plates 113. Each guide plate 113 is equipped with a drive pump. The drive pump drives the heat medium to rotate clockwise or counterclockwise. In the direction of heat medium rotation, the heat medium chamber 112 that can be driven by gravity may not be equipped with a drive pump, and the heat medium can be rotated by gravity.

[0053] In one specific embodiment, the heat medium chamber 112 is provided with at least one partition 115 to divide the heat medium chamber 112 into multiple chamber sections 114, and each chamber section 114 is interconnected. The partition 115 is provided with a conveying mechanism 14. The conveying mechanism 14 between each chamber section 114 is provided on the partition 115 of the heat medium chamber 112 above the heat medium chamber 112 in the opposite direction of heat medium rotation, with the heat medium chamber 112 into which heat medium enters as the base point.

[0054] For example, there are three heat medium chambers 112, which are designated as the first heat medium chamber, the second heat medium chamber, and the third heat medium chamber according to the direction of heat medium rotation. Each heat medium chamber is divided into three sections 114 by three partitions 115: the first section, the second section, and the third section. The heat inlet is located in the first section of the first heat medium chamber. The conveying mechanism 14 of the second section is located on the partition 115 where the first and second sections intersect in the third heat medium chamber. The conveying mechanism 14 of the third section is located on the partition 115 where the second and third sections intersect in the second heat medium chamber. This arrangement can maximize the conformity with the direction of heat medium rotation and minimize the impact on the rotation of the heat medium.

[0055] After the partition 115 divides the heat medium chamber 112, the heat medium driven by the drive mechanism 13 is hindered from moving axially by the partition 115, which makes the driving process smoother and more conducive to the drive mechanism 13. Each partition 115 is provided with a conveying mechanism 14 for connecting the chamber section 114, which further improves the precision of flow rate control.

[0056] In one specific embodiment, the housing 111 is provided with a viewing valve 117, which is connected to the heat medium chamber 112. A cleaning mechanism is connected to the outside of the viewing valve 117. When the viewing valve 117 is opened, the cleaning mechanism extends into the heat medium chamber 112 for cleaning. The cleaning mechanism includes a cleaning scraper, which is hollow inside and connected to a water gun. When the viewing valve 117 is opened, the cleaning scraper is inserted into it to clean the small amount of impurities inside the housing 111.

[0057] In one specific embodiment, the monitoring mechanism 3 includes a temperature monitoring element 31, a flow rate monitoring element 32, and a flow rate control element 33; the temperature monitoring element 31 is preferably a thermometer, the flow rate monitoring element 32 is preferably a flow meter, and the flow control element is preferably a flow pump.

[0058] Refrigerant pipe assembly 22 includes refrigerant delivery pipe 221 and refrigerant outlet pipe 222; heat pipe assembly 21 includes heat delivery pipe 211 and heat outlet pipe 212.

[0059] The refrigerant delivery pipe 221, the refrigerant output pipe 222, the heat transfer pipe 211, and the heat transfer pipe 212 are all equipped with a temperature monitoring element 31 and a flow rate monitoring element 32;

[0060] The refrigerant delivery pipe 221, the heat transfer pipe 211, and the heat output pipe 212 are all equipped with flow rate monitoring system 33.

[0061] In one specific embodiment, the flow velocity of the refrigerant channel 12 is less than that of the heat medium channel 11. Those skilled in the art will understand that this application has a corresponding control system to control each drive pump and the flow rate monitoring system 33. When the heat medium just enters the heat medium channel 11, the power of the flow rate monitoring system 33 of the heat medium delivery pipe 211 and the conveying mechanism 14 at the position of the baffle 115 can be increased to allow the heat medium to quickly contact the refrigerant channel 12, so that the refrigerant is heated evenly. When the heat medium flows out of the heat medium outlet pipe 212... After the heat medium is removed, the power of the flow rate monitoring device 33 at the heat medium delivery pipe 211 and the heat medium output pipe 212 can be reduced accordingly. At the same time, the conveying mechanism 14 at the baffle 115 can be adjusted to match the flow rate of the flow rate monitoring device 33 at the heat medium delivery pipe 211, thereby reducing the flow rate of the heat medium entering and exiting. Then, the power of the drive mechanism 13 at the guide plate 113 can be increased to increase the rotational flow rate of the heat medium in order to avoid impurity deposition. At the same time, the flow rate of the heat medium entering and exiting should be adjusted by referring to the value of the temperature monitoring device 31 during the heat exchange process.

[0062] In one specific embodiment, a second heat exchange mechanism is also included. The second heat exchange mechanism is connected to the refrigerant pipe group 22 and the heat pipe group 21. When the heat exchange mechanism 1 is cleaned or damaged, the second heat exchange mechanism serves as a backup.

[0063] The refrigerant enters the heat exchange tube 123 through the refrigerant pipe assembly 22 and flows at a relatively low speed. The heat medium enters the heat medium channel 11 through the heat medium pipe assembly 21 and rotates around the heat exchange tube 123 at a relatively high speed. This is to prevent the slow flow of the heat medium in the heat exchanger from causing impurities to deposit and exacerbating the heat exchanger structure. At the same time, the flow rate of the heat medium entering and exiting is relatively reduced. Under the action of the temperature detection element and the control system, the flow rate of the heat medium entering and exiting adapts to the flow rate of the refrigerant to enhance the heat transfer effect.

[0064] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0065] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0066] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A waste heat utilization system for low-pressure flash distillation black water in coal chemical industry, characterized in that, This includes pipe sets, monitoring mechanisms, and heat exchange mechanisms; The pipe assembly includes a heat medium pipe assembly and a refrigerant pipe assembly; the monitoring mechanism is connected to the pipe assembly. Both the refrigerant pipe assembly and the heat transfer pipe assembly are connected to the heat exchange mechanism, which includes a heat transfer channel, a refrigerant channel, and a drive mechanism. The refrigerant channel and the heat transfer channel are in contact, and the refrigerant channel is filled with refrigerant. The heat transfer channels are distributed around the refrigerant channels, and the heat transfer channels are filled with heat transfer medium. The heat transfer channels are equipped with a drive mechanism, which drives the heat transfer medium to rotate around the refrigerant channels.

2. The waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry according to claim 1, characterized in that, The heat medium channel includes a shell, and at least two heat medium chambers are distributed circumferentially along the shell axis inside the shell. The two heat medium chambers are interconnected and the drive mechanism is provided at their intersection. The shell has a heat inlet and a heat outlet perpendicular to the axial direction at both ends. The refrigerant channel passes through the shell and is distributed inside the heat medium channel.

3. A waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry according to claim 2, characterized in that, The refrigerant passage includes a cold inlet pipe, a cold outlet pipe, and multiple heat exchange pipes; The cold inlet pipe and the cold outlet pipe are disposed through the shell, and the plurality of heat exchange pipes are respectively connected to the cold inlet pipe and the cold outlet pipe; Multiple heat exchange tubes are evenly distributed within each of the heat medium chambers.

4. A waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry according to claim 3, characterized in that, Multiple heat exchange tubes are distributed circumferentially along the axial direction of the shell. The heat exchange tubes are a network structure formed by interlacing small pipes and are arranged perpendicular to the flow direction of the heat medium.

5. A coal chemical low-pressure flash evaporation black water waste heat utilization system according to claim 2, characterized in that, The driving mechanism includes at least one driving pump. The heat medium chambers are separated by guide plates. Each guide plate is equipped with the driving pump. The driving pump drives the heat medium to rotate clockwise or counterclockwise.

6. A waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry according to claim 2, characterized in that, The heat medium chamber is provided with at least one partition that divides the heat medium chamber into multiple sections, and each section is interconnected. The partition is provided with a conveying mechanism.

7. A coal chemical low-pressure flash evaporation black water waste heat utilization system according to claim 2, characterized in that, The housing is equipped with a viewing valve, which is connected to the heat medium chamber. When the viewing valve is opened, the heat medium chamber is cleaned through the viewing valve.

8. A waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry according to claim 1, characterized in that, The monitoring mechanism includes temperature monitoring components, flow rate monitoring components, and flow rate control components; The refrigerant piping assembly includes a refrigerant delivery pipe and a refrigerant outlet pipe; the heat transfer pipe assembly includes a heat transfer pipe and a heat transfer outlet pipe. The refrigerant delivery pipe, refrigerant output pipe, heat transfer pipe, and heat transfer pipe are all equipped with the temperature monitoring device and the flow rate monitoring device; The refrigerant delivery pipe, the heat transfer pipe, and the heat output pipe are all equipped with the flow rate control component.

9. A waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry according to claim 1 or 8, characterized in that, The flow rate of the refrigerant channel is less than that of the heat medium channel.

10. A waste heat utilization system for low-pressure flash evaporation black water in coal chemical industry according to claim 1, characterized in that, It also includes a second heat exchange mechanism, which is connected to the refrigerant pipe group and the heat pipe group.

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