Temperature reduction tower turbulent flow heat exchange pipe network cooperated urea solution preparation waste heat recycling system

Abstract

The invention discloses a temperature reduction tower turbulent flow heat exchange pipe network synergistic urea solution preparation waste heat recycling system, and relates to the technical field of flue gas treatment, the temperature reduction tower turbulent flow heat exchange pipe network synergistic urea solution preparation waste heat recycling system comprises a deacidification temperature reduction tower and a urea solution storage tank, high-temperature flue gas passes through the deacidification temperature reduction tower, a turbulent flow heat exchange pipe network is arranged in the deacidification temperature reduction tower, and the urea solution storage tank comprises a storage tank coil pipe; an inlet of the turbulent flow heat exchange pipe network is connected to the urea dissolving tank, an outlet is connected to the storage tank coil, and the other end of the storage tank coil is connected to the urea dissolving tank; the turbulent flow heat exchange pipe network is provided with a plurality of layers which are communicated with one another, and turbulent flow blades are arranged outside the turbulent flow heat exchange pipe network to guide flue gas to flow in the deacidification temperature reduction tower. The waste heat of the high-temperature flue gas at the outlet of the boiler is recycled to the preparation process of the urea solution, so that the energy-saving effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, and in particular to a system for the reuse of waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network. Background Technology

[0002] In the field of environmental protection, the reuse of high-temperature flue gas waste heat has multi-dimensional significance. Its value is not only reflected in energy conservation and pollution reduction, but also has a profound impact on industrial upgrading, circular economy development, and ecological protection. The popularization of waste heat utilization technology promotes the transformation of enterprises from "high energy consumption and high emissions" to "green manufacturing," while conveying the concept of "limited energy, unlimited recycling" to the public and promoting a low-carbon lifestyle throughout society. High-temperature flue gas waste heat recovery is a core link in industrial waste heat utilization, conforming to the principles of "reduction, reuse, and resource recovery."

[0003] For flue gas treatment systems, the reuse of waste heat from the cooling tower can reduce the overall water consumption and reactant consumption of the cooling desulfurization tower system, and convert excess heat into the energy required for urea solid dissolution in the SNCR urea denitrification system, thereby reducing the heating equipment required for urea solution preparation and lowering system energy consumption. This fundamentally achieves the environmental protection and energy-saving goals of the flue gas treatment system. Summary of the Invention

[0004] The purpose of this invention is to provide a system for the reuse of waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchanger network, thereby achieving energy conservation by reusing the waste heat from high-temperature flue gas at the boiler outlet into the urea solution preparation process of the SNCR system.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A system for utilizing waste heat from urea solution preparation in conjunction with a deacidification deacidification tower and a urea solution storage tank is disclosed. The system includes a deacidification deacidification tower and a urea solution storage tank. High-temperature flue gas passes through the deacidification deacidification tower, which is equipped with a turbulent heat exchange network. The urea solution storage tank includes a storage tank coil. The inlet of the turbulent heat exchange network is connected to a urea dissolving tank, and the outlet is connected to the storage tank coil. The other end of the storage tank coil is connected to the urea dissolving tank. The turbulent heat exchange network has several interconnected layers, and turbulence blades are provided outside the network to guide the flow of flue gas within the deacidification deacidification tower.

[0006] Furthermore, the turbulence heat exchange network includes an outer ring pipe, an inner ring pipe, and a central connecting pipe. Several outer ring branch pipes connect the outer ring pipe and the inner ring pipe, and several inner ring branch pipes connect the inner ring pipe and the central connecting pipe. Turbulence blades are connected to the outside of the outer ring branch pipes and the inner ring branch pipes.

[0007] Furthermore, the deflector blades are tilted, and the deflector blades on the outer or inner ring branch pipes within the same ring have the same tilt direction in the same clockwise direction.

[0008] Furthermore, the turbulence-disrupting blades on the outer and inner ring branch pipes of the same layer are tilted in opposite directions, and the turbulence-disrupting blades on the outer or inner ring branch pipes of adjacent layers are tilted in opposite directions.

[0009] Furthermore, the flue gas in the deacidification and desuperheating tower enters from the top and exits from the bottom, and the turbulent heat exchange network has a lower layer for liquid inlet and an upper layer for liquid outlet.

[0010] Furthermore, the deacidification and cooling tower is internally connected with several pairs of upper and lower supporting ring plates, and the outer ring pipe is fixed between the corresponding upper and lower supporting ring plates.

[0011] Furthermore, the upper and lower supporting ring plates are conical, with one end closer to the other being the smaller end, guiding the flue gas to converge towards the center.

[0012] Furthermore, the urea dissolving tank is connected to the urea granule inlet, the demineralized water replenishment inlet, and the urea solution delivery pump. The urea granule inlet is used to feed urea granules, the demineralized water replenishment inlet is connected to the demineralized water pipeline network through a water replenishment electric valve, and the outlet end of the urea solution delivery pump is connected to the urea solution storage tank to deliver and store the prepared urea solution.

[0013] Furthermore, the storage tank coil is installed in a spiral shape on the urea solution storage tank.

[0014] Furthermore, the outlet of the storage tank coil is connected to a stirring network, which is located at the bottom of the urea dissolving tank. The stirring network is arranged in a planar mesh and is equipped with several nozzles, which are inclined in a clockwise direction.

[0015] In summary, the present invention has the following beneficial effects: This invention incorporates a turbulent heat exchange network inside the existing deacidification cooling tower. This network uses excess heat from the flue gas in the reaction tower to heat the urea solution delivered by the urea circulation pump, thus providing auxiliary cooling to the deacidification cooling tower and simultaneously raising the temperature of the urea solution for urea dissolution. This process significantly reduces the deacidification cooling water consumption of the original deacidification cooling tower, and eliminates the need for additional electric heating equipment during the urea dissolution process, thereby reducing equipment investment and energy consumption. By setting up a two-layer turbulence heat exchange network, with the two layers of heat exchange pipes connected and all connecting branch pipes equipped with turbulence vanes, not only can the heat exchange efficiency between flue gas and the medium inside the pipes be greatly improved, but the flue gas inside the tower can also form turbulence to improve the flue gas flow field inside the tower. In addition, the turbulence vanes of the two layers of turbulence heat exchange network are arranged with opposite rotation directions in the inner and outer circles and in the upper and lower layers, which can enhance the turbulence disturbance of the flue gas and improve the mass transfer effect between the flue gas and the reactant inside the tower, thereby improving the acid removal efficiency of the reaction tower while exchanging heat. Furthermore, the turbulent heat exchange network can be modified into a turbulent jet network for other applications according to system requirements. Simply add appropriate nozzles as needed to achieve integrated reaction dissolution, storage, heat preservation, and turbulent jetting. It is not limited to the simple preparation and storage of urea solutions; its application scenarios are flexible and diverse. The conical ring plate support set on the outer ring of the turbulent heat exchange pipe network not only serves as a support for the turbulent heat exchange pipe network, but also improves the flue gas flow field inside the tower, forming a flow convergence effect on the flue gas and preventing the flue gas from escaping along the tower wall and forming a flue gas corridor during the reaction process inside the tower. This ring plate support structure is not only suitable for semi-dry reaction towers with top inlet and bottom outlet, but also for countercurrent wet reaction towers with bottom inlet and top outlet, which can improve the reaction efficiency inside the deacidification tower to a certain extent. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a system for the reuse of waste heat from urea solution preparation using a de-icing tower turbulence heat exchanger network in conjunction with the present invention. Figure 2 This is a schematic diagram of the connection of the turbulent heat exchange network in a system for the reuse of waste heat from urea solution preparation using a de-icing tower turbulent heat exchange network in accordance with the present invention. Figure 3 This is a schematic diagram of the structure of the turbulent heat exchange network in a system for the reuse of waste heat from urea solution preparation using a de-icing tower turbulent heat exchange network in accordance with the present invention. Figure 4 This is a schematic diagram of the conical ring plate part in the waste heat recovery system of urea solution preparation in conjunction with the turbulence heat exchange pipe network of the de-icing tower according to the present invention; Figure 5 This is a schematic diagram of the structure of the agitation and stirring pipe network in a waste heat recovery system for urea solution preparation using a de-icing tower turbulence heat exchange pipe network in accordance with the present invention.

[0017] In the diagram, 1. Urea dissolving tank; 2. First filter; 3. First electric valve; 4. Urea circulation pump; 5. Pressure transmitter; 6. Electric regulating valve; 7. First check valve; 8. Deacidification and cooling tower; 9. Turbulent heat exchange pipe network; 91. Outer ring pipe; 92. Inner ring pipe; 93. Central connecting pipe; 94. Outer ring branch pipe; 95. Inner ring branch pipe; 10. Water supply electric valve; 11. First temperature transmitter; 12. Liquid level transmitter; 13. Turbulent stirring pipe network; 14. Second filter; 15. Second electric valve; 16. Urea solution transfer pump; 17. Second check valve; 18. Urea solution storage tank; 19. Conical ring plate; 20. Storage tank coil; 21. Second temperature transmitter. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0019] A system for recovering waste heat from urea solution preparation using a desuperheating tower turbulence heat exchanger network, such as... Figure 1 As shown, the system includes a deacidification and desuperheating tower 8 and a urea solution storage tank 18. High-temperature flue gas enters the deacidification and desuperheating tower 8 from the top and exits from the bottom. The deacidification and desuperheating tower 8 can be a semi-dry reaction tower or a wet reaction tower, and is suitable for common flue gas treatment systems such as semi-dry reaction towers, dry reaction towers, and wet reaction towers. The inlet flue gas of the deacidification and desuperheating tower 8 is the high-temperature flue gas from the boiler economizer outlet, with a flue gas temperature of about 210°C. Since the flue gas itself needs to be cooled before entering the subsequent flue gas treatment equipment, this embodiment reuses this part of the waste heat.

[0020] like Figure 1 As shown, the deacidification cooling tower 8 is equipped with a turbulent heat exchange pipe network 9, and the urea solution storage tank 18 includes an outer storage tank coil 20. The inlet of the turbulent heat exchange pipe network 9 is connected to the urea dissolving tank 1, the outlet is connected to the storage tank coil 20, and the other end of the storage tank coil 20 is connected back to the urea dissolving tank 1. In this embodiment, the turbulent heat exchange network 9 is provided with several interconnected layers (two layers), and turbulent blades are provided on the outside of the turbulent heat exchange network 9 to guide the flow of flue gas in the deacidification and cooling tower 8. The flue gas in the deacidification and cooling tower 8 enters from the top and exits from the bottom. The turbulent heat exchange network 9 is for liquid inlet in the lower layer and liquid outlet in the upper layer, so that the flue gas forms a high-temperature section and a low-temperature section in the deacidification and cooling tower 8 from top to bottom. The high-temperature section in the upper part of the deacidification and cooling tower 8 is provided with two layers of turbulent heat exchange network 9. The turbulent heat exchange network 9 is for inlet in the lower low-temperature section and outlet in the high-temperature section.

[0021] like Figure 2 and Figure 3As shown, the turbulence heat exchange network 9 includes an outer ring pipe 91, an inner ring pipe 92, and a central connecting pipe 93. Twelve evenly distributed outer ring branch pipes 94 connect the outer ring pipe 91 and the inner ring pipe 92, and six evenly distributed inner ring branch pipes 95 connect the inner ring pipe 92 and the central connecting pipe 93. Turbulence blades are connected to the outer ring branch pipes 94 and the inner ring branch pipes 95. The upper and lower layers of the network are connected through the central connecting pipe 93 to achieve network connectivity. The turbulence blades are arranged at an angle of 30° in a clockwise direction, and the turbulence blades on the outer ring branch pipe 94 or inner ring branch pipe 95 in the same ring have the same angle in the same clockwise direction; the turbulence blades on the outer ring branch pipe 94 and inner ring branch pipe 95 in the same layer have opposite angles, and the turbulence blades on the outer ring branch pipe 94 or inner ring branch pipe 95 in adjacent layers have opposite angles, so that the flue gas swirls in opposite directions between the inner and outer rings and between the upper and lower layers; The entire turbulent heat exchange network 9 is an internal structure, which has high heat exchange efficiency and low heat loss. Both the outer ring branch pipe 94 and the inner ring branch pipe 95 are equipped with turbulent blades, and the inner and outer rings and the upper and lower layers of the turbulent blades rotate in opposite directions. This can increase the turbulent disturbance of the flue gas during the reaction process of the original desuperheating acid removal tower, improve the gas-liquid or gas-gas mass transfer effect in the tower, and thus improve the desuperheating acid removal efficiency. In addition, the structural form of the turbulent heat exchange network 9 combined with the turbulent blades can, on the one hand, increase the disturbance of the flue gas in the tower and improve the reaction efficiency, and on the other hand, indirectly increase the heat exchange area of ​​the heat exchange tubes, which greatly improves the overall heat exchange efficiency of the heat exchange network.

[0022] In some embodiments, the turbulent heat exchange network 9 can be modified for different uses depending on the application scenario and the transmission medium. For example, when the transmission medium is a reactant inside the tower that requires heating and insulation, the turbulent heat exchange network 9 can be designed to be changed into a turbulent jet network for collection at the bottom of the tower. This turbulent jet network only requires adding atomizing nozzles to the loop pipes on the basis of the original heat exchange network as needed. This system can integrate multiple functions such as reactant dissolution and preparation, reactant insulation, reactant jet atomization, and flue gas turbulence and mass transfer in the reaction tower.

[0023] like Figure 4 As shown, the outer ring pipe 91 is arranged along the inner wall of the tower and is supported and fixed to the inner wall of the tower by the conical ring plate 19. Specifically, there are several pairs of conical ring plates 19 (upper ring plate and lower ring plate) connected inside the deacidification and cooling tower 8. The outer ring pipe 91 is fixed between the corresponding upper ring plate and lower ring plate. The upper ring plate and lower ring plate are conical and have a smaller end close to each other to guide the flue gas to gather towards the center. The conical ring plate 19 is an upper and lower inclined ring plate support structure. While providing support for the outer ring pipe 91 of the turbulent heat exchange pipe network 9, its inclined ring plate structure can form a flow convergence effect of flue gas in the tower towards the center of the tower, effectively preventing the flue gas from flowing along the tower wall and forming a flue gas corridor. It also works in conjunction with the turbulent blades in the turbulent heat exchange pipe network 9 to improve the flue gas flow field distribution in the tower, effectively improving the disturbance mass transfer effect of the deacidification desuperheating tower 8 and thus improving the reaction efficiency.

[0024] like Figure 1 As shown, the urea dissolving tank 1 is connected to the urea granule inlet, the demineralized water replenishment inlet, and the urea solution conveying pump 16. The urea granule inlet is used to feed urea granules. The demineralized water replenishment inlet is connected to the water replenishment electric valve 10 and is connected to the demineralized water pipeline network through the water replenishment electric valve 10. The outlet end of the urea solution conveying pump 16 is connected to the urea solution storage tank 18 to convey and store the prepared urea solution. Specifically, the inlet of the turbulent heat exchange network 9 is connected to the outlet of the urea circulation pump 4 through the first check valve 7 and the electric regulating valve 6. The inlet of the urea circulation pump 4 is connected to the urea dissolving tank 1 and the first filter 2 (Y-type filter) and the first electric valve 3 are configured in the middle. During the preparation of urea solution in urea dissolving tank 1, the demineralized water replenishment electric valve 10 is first opened. Urea dissolving tank 1 is equipped with a level transmitter 12. When the demineralized water replenishment reaches the level set by the control system, the replenishment electric valve 10 will automatically close. Then, a fixed amount of urea granules are added. At this time, the first electric valve 3 is opened and the urea circulation pump 4 is started. After a 3-second delay, the electric regulating valve 6 is opened. The first filter 2 (Y-type filter) at the inlet of the urea circulation pump 4 can prevent large particles in the tank from entering the urea circulation pump 4, protecting the safe operation of the pump. The first check valve 7 at the outlet of the urea circulation pump 4 can protect the pump from water hammer damage to the impeller when the pump stops. The pressure transmitter 5 at the outlet can monitor the pump's operating status in real time. The tank wall of the urea dissolving tank 1 is connected to the first temperature transmitter 11. The electric regulating valve 6 can automatically adjust the opening of the electric regulating valve 6 according to the temperature feedback from the first temperature transmitter 11, thereby controlling the flow rate of the urea solution entering the turbulent heat exchange network 9, thereby further controlling the heat exchange between the waste heat of the tower and the urea solution delivered by the urea circulation pump 4, and finally achieving the purpose of controlling the dissolving temperature of the urea solution in the urea dissolving tank 1. In summary, the level transmitter 12 and the first temperature transmitter 11 equipped with the urea dissolving tank 1 can monitor the level and temperature of the solution in the urea dissolving tank 1 in real time. Furthermore, the temperature feedback of the first temperature transmitter 11 can be interlocked with the electric regulating valve 6 at the outlet of the urea circulation pump 4. When the temperature decreases, the opening of the regulating valve can be increased, and when the temperature is too high, the opening of the regulating valve can be decreased, thereby maintaining the temperature of the solution in the urea dissolving tank 1 at 40℃-60℃, which is conducive to the dissolution of urea particles. Furthermore, a second temperature transmitter 21 is installed at the outlet of the upper layer of the turbulent heat exchange pipeline network 9 to monitor the maximum temperature of the urea solution after being heated by waste heat. It is linked with the electric regulating valve 6 at the outlet of the urea circulation pump 4 to control the heat exchange through flow regulation, thereby ensuring that the maximum heating temperature of the urea solution does not exceed 60°C and preventing pyrolysis during the heating process.

[0025] like Figure 1 As shown, the outlet of the upper turbulent heat exchange network 9 is connected to the inlet of the storage tank coil 20, which is spirally installed in the urea solution storage tank 18. The storage tank coil 20 is spirally wound around the tank wall from top to bottom, and the outlet of the storage tank coil 20 is connected to the turbulent stirring network 13, which is located at the bottom of the urea dissolving tank 1. The urea solution delivery pump 16 is connected to the urea dissolving tank 1 through the second filter 14 (Y type) and the second electric valve 15, and finally delivers the prepared urea solution to the urea solution storage tank 18. The pressure transmitter 5, the first temperature transmitter 11, the electric regulating valve 6, and the second electric valve 15 configured in the urea solution circulation pipeline can monitor the pressure and temperature of the circulation pipeline in real time, and adjust the urea solution circulation volume according to the temperature feedback, thereby controlling and maintaining the temperature of the urea solution throughout the circulation process, so as to keep the urea dissolution process stable. The storage tank coil 20 can exchange heat between the high-temperature urea solution from the turbulent heat exchange network 9 and the finished urea solution in the urea solution storage tank 18, thereby keeping the urea solution storage tank 18 warm and preventing the finished urea solution from recrystallizing due to heat loss and temperature drop, thus avoiding affecting its subsequent delivery to the SNCR injection system. After the secondary heat exchange, the urea solution will be maintained at 40℃-60℃ under the premise of flow control and finally delivered to the turbulent stirring network 13 at the bottom of the urea dissolving tank 1.

[0026] like Figure 5 As shown, the agitation and stirring network 13 is arranged in a planar mesh. The main pipe and all branch pipes are opened with injection holes and equipped with nozzles, and are evenly arranged at the bottom of the urea dissolving tank 1. The nozzles are inclined in a clockwise direction. In this embodiment, the nozzles are arranged at 45° clockwise along the center. The size and number of holes are selected according to the flow rate of the urea circulation pump 4. The agitation and stirring network 13 utilizes the flow and pressure of the urea circulation pump 4 to create a jetting effect at the bottom of the urea dissolving tank 1. Since all nozzles are arranged at a 45° angle clockwise around the center, the solution in the urea dissolving tank 11 will be agitated clockwise under the jetting force. Simultaneously, with the support of the refluxed, heat-exchanged, high-temperature urea solution, the urea particles are rapidly stirred and dissolved. The prepared dissolved urea solution is then transported to the urea solution storage tank 18 for later use. The urea solution storage tank 18 of this invention uses a coil to conduct secondary heat exchange on the high-temperature urea solution transported from the turbulent heat exchange network 9 to insulate the urea solution storage tank 18, preventing secondary crystallization due to temperature drop in the tank. This process not only utilizes the waste heat from the deacidification cooling tower 8 but also eliminates the need for heating and insulation equipment for the urea solution storage tank 18, thereby further reducing equipment investment and energy consumption. After secondary heat exchange, the temperature of the urea solution in the urea solution circulation pipeline will only decrease slightly and will not affect the subsequent temperature rise of the urea solution in the urea dissolving tank 1. In this embodiment, the stirring in the urea dissolving tank 1 adopts a large backflow disturbance stirring process at the outlet of the urea circulation pump 4. Compared with the traditional urea dissolving method, the top-mounted agitator is eliminated, reducing the construction cost. Moreover, due to the inclined arrangement of the nozzles of the disturbance stirring pipeline 13, the disturbance stirring effect is better, which is more conducive to the dissolution of urea particles and prevents particle sedimentation.

[0027] This invention combines the deacidification and cooling tower system in the flue gas system with the urea dissolution and preparation system. By configuring turbulent heat exchange tubes, coils, matching valves and fittings, pumps, instruments, etc., it realizes a waste heat secondary reuse system that integrates turbulent mass transfer, gas-liquid heat exchange, and even reactant preparation, storage and injection in the reaction tower. The entire waste heat reuse system is mainly based on mechanical heat exchange, without the need for any heating equipment. The equipment investment is small, the system is stable and reliable, and it can achieve energy saving and environmental protection in essence.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within the scope of its essence and protection. Such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network, characterized in that: The system includes a deacidification and desuperheating tower and a urea solution storage tank. High-temperature flue gas passes through the deacidification and desuperheating tower, which is equipped with a turbulent heat exchange pipe network. The urea solution storage tank includes a storage tank coil. The inlet of the turbulent heat exchange pipe network is connected to the urea dissolving tank, and the outlet is connected to the storage tank coil. The other end of the storage tank coil is connected to the urea dissolving tank. The turbulent heat exchange pipe network has several interconnected layers, and turbulent blades are provided outside the turbulent heat exchange pipe network to guide the flow of flue gas in the deacidification and desuperheating tower.

2. The system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 1, characterized in that: The turbulence heat exchange network includes an outer ring pipe, an inner ring pipe, and a central connecting pipe. Several outer ring branch pipes connect the outer ring pipe and the inner ring pipe, and several inner ring branch pipes connect the inner ring pipe and the central connecting pipe. Turbulence blades are connected to the outside of the outer ring branch pipes and the inner ring branch pipes.

3. The system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 2, characterized in that: The deflector blades are tilted, and the deflector blades on the outer or inner ring branch pipes within the same ring are tilted in the same clockwise direction.

4. The system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 3, characterized in that: The turbulence-disrupting blades on the outer and inner ring branch pipes of the same layer are tilted in opposite directions, and the turbulence-disrupting blades on the outer or inner ring branch pipes of adjacent layers are tilted in opposite directions.

5. The system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 1, characterized in that: The flue gas in the deacidification and cooling tower enters from the top and exits from the bottom, and the turbulent heat exchange pipeline network has liquid inlet at the bottom and liquid outlet at the top.

6. The system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 2, characterized in that: The deacidification and cooling tower is internally connected to several pairs of upper and lower supporting ring plates, with the outer ring pipe fixed between the corresponding upper and lower supporting ring plates.

7. A system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 6, characterized in that: The upper and lower supporting ring plates are conical, with one end closer to the other being the smaller end, guiding the flue gas to converge towards the center.

8. The system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 1, characterized in that: The urea dissolving tank is connected to the urea granule inlet, the demineralized water replenishment inlet, and the urea solution delivery pump. The urea granule inlet is used to feed urea granules, the demineralized water replenishment inlet is connected to the demineralized water pipeline network through a water replenishment electric valve, and the outlet end of the urea solution delivery pump is connected to the urea solution storage tank to deliver and store the prepared urea solution.

9. A system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 1 or 8, characterized in that: The storage tank coil is installed in a spiral shape on the urea solution storage tank.

10. A system for utilizing waste heat from urea solution preparation in conjunction with a desuperheating tower turbulence heat exchange network according to claim 1, characterized in that: The outlet of the storage tank coil is connected to the agitation and stirring network, which is located at the bottom of the urea dissolving tank. The agitation and stirring network is arranged in a planar mesh and is equipped with several nozzles, which are inclined in a clockwise direction.

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