Urea hydrolysis system

Abstract

The invention relates to the technical field of urea hydrolysis, and discloses a urea hydrolysis system which comprises a drain tank, a hot water circulation heat preservation module, a closed loop formed by a urea dissolving tank and the like, and a bidirectional flow regulation and anti-cavitation assembly arranged between an inlet of a circulating pump and a buffer tank to guarantee continuous and stable hot water circulation; the heating medium intelligent switching module is used for cooperatively controlling a three-way valve through temperature and flow, so that self-adaptive switching of steam and drainage heating is realized, requirements are accurately matched, and steam consumption is reduced; the gradient drainage reuse management and control module is used for realizing drainage gradient utilization by utilizing a drainage reuse branch and a multi-parameter water quality closed-loop monitoring unit; the steam condensation recovery strengthening module is used for reducing steam dissipation by means of a steam capture condensation recovery device; the drainage anti-scaling pretreatment module is used for reducing scaling of pipeline equipment; and the system emergency guarantee module can automatically guide back and drain water when the water quality is abnormal, so that the steam emission is reduced, and the operation stability, energy-saving performance and economical efficiency of the system are integrally improved.

Description

Technical Field

[0001] This invention relates to the field of urea hydrolysis technology, specifically to a urea hydrolysis system. Background Technology

[0002] Urea hydrolysis systems are widely used in the denitrification field. By hydrolyzing urea solution to generate ammonia, a reducing agent is provided for the flue gas denitrification reaction. Its operational stability, energy efficiency, and economy directly affect the overall effectiveness of the denitrification process. In industrial applications, the urea hydrolysis process needs to maintain a specific temperature range, relying on hot water circulation and steam heating to provide heat. Simultaneously, a large amount of hydrophobic water is generated. Therefore, the recovery and utilization of hydrophobic water, prevention of scaling, and prevention of steam leakage are crucial for the long-term operation of the system.

[0003] In existing urea hydrolysis systems, the condensate reuse branches often lack a robust abnormal operating condition backflow switching mechanism, and there is no precise backflow control structure for abnormal water quality, relying solely on simple water quality monitoring or manual intervention. This structural design flaw means that when abnormal condensate quality occurs, it cannot be promptly redirected from the reuse branch back to the condensate tank. The continuous entry of abnormal condensate into the reuse process not only affects the operation of subsequent equipment but also indirectly causes an imbalance in the operating conditions within the condensate tank, leading to steam leakage, significant heat loss, and impacting the overall system stability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a urea hydrolysis system to solve the problem mentioned in the background art, which causes imbalance in the working conditions within the condensate tank, leading to steam leakage, significant heat loss, and affecting the overall operational stability of the system.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a urea hydrolysis system, comprising:

[0006] The hot water circulation and insulation module of the condensate tank consists of a urea dissolving tank, a urea solution storage tank, a urea hydrolyzer, a heating coil, a condensate tank, a buffer tank, and a circulation pump, forming a closed loop. A bidirectional flow regulation and anti-cavitation component is connected in series between the inlet of the circulation pump and the buffer tank. The hot water in the condensate tank is forced to circulate through the circulation pump. Intelligent switching module for heating medium: A three-way valve with coordinated temperature and flow control is installed at the inlet of the heating coil and the outlet of the condensate tank. The inlet is connected to the steam pipe and the hot water pipe of the condensate tank respectively, and the outlet is connected to the heating coil to realize adaptive switching between steam heating and condensate heating. Gradient hydrophobic reuse control module: A hydrophobic reuse branch is set at the outlet of the circulating pump, and a multi-parameter water quality closed-loop monitoring unit is integrated to collect water quality data in real time and match different reuse scenarios to realize the hydrophobic gradient utilization. Steam condensation recovery enhancement module: A steam capture and condensation recovery device with a spiral condenser and non-condensable gas separation integrated component that is sealed at the exhaust end of the condensate tank, extends the steam residence time and separates non-condensable gases; Hydrophobic and anti-scaling pretreatment module: The buffer tank is equipped with a honeycomb flow guide and magnetic descaling components to guide the hydrophobic flow evenly and intercept and remove impurities that cause scaling. The system emergency protection module is equipped with an abnormal operating condition backflow switching unit between the reuse branch and the condensate tank. When the water quality is abnormal, the condensate is automatically redirected back to reduce the amount of steam escaping from the condensate tank at the source.

[0007] Preferably, the bidirectional flow regulation and anti-cavitation component includes a flow sensor, an adjustable flow valve, and a cavitation protection chamber. The flow sensor monitors the circulating flow in real time and feeds it back to the adjustable flow valve. The cavitation protection chamber suppresses cavitation at the inlet of the circulating pump through a negative pressure buffer structure. These three components form a closed-loop linkage control system. The flow sensor transmits monitoring data to the control system in real time, and the adjustable flow valve precisely fine-tunes its opening based on feedback to ensure that the circulating flow rate remains stable within a reasonable range. The negative pressure buffer structure inside the cavitation protection chamber can quickly absorb pressure fluctuations on the inlet side, preventing the formation of bubbles due to local negative pressure. At the same time, it reduces the impact and wear of bubbles on the pump impeller, adapting to complex operating conditions such as system start-up and shutdown and load changes, ensuring long-term stable operation of the circulating pump, and improving the reliability of the entire hot water circulation loop.

[0008] Preferably, the temperature and flow rate coordinated control three-way valve establishes a wired signal linkage with the temperature monitoring element of the relevant equipment, and dynamically adjusts the valve opening ratio by collecting real-time temperature and hydrophobic circulation flow data of the solution in the equipment; Wired signal linkage offers advantages such as stable transmission and low latency, avoiding control deviations caused by environmental interference in wireless transmission. The control system performs collaborative analysis of collected temperature and flow data to accurately determine heating requirements. When the solution temperature is low, it increases the steam inlet opening and decreases the condensate inlet ratio; when the temperature approaches the set value, it gradually switches to condensate heating, ensuring heating efficiency, maximizing the utilization of waste heat, and avoiding the impact of sudden temperature changes caused by medium switching on equipment and solution stability.

[0009] Preferably, the multi-parameter water quality closed-loop monitoring unit integrates pH value and suspended solids content monitoring functions, and is equipped with a data storage and trend analysis submodule to provide early warning of potential exceedance risks by analyzing water quality change trends; Employing an online real-time monitoring mode, the system eliminates the need for manual sampling and testing, significantly improving monitoring efficiency and reducing human error. The data storage submodule retains long-term water quality data, providing a basis for subsequent system optimization and fault tracing. The trend analysis submodule, through fitting and analyzing historical data, can capture subtle patterns in water quality changes and issue early warning signals before indicators approach exceed thresholds. Simultaneously, the monitoring unit is linked to the reuse branch valves, automatically switching reuse paths based on water quality levels to ensure that reused water meets standards in different scenarios.

[0010] Preferably, the spiral condensation channel of the integrated spiral condensation and non-condensable gas separation component adopts a tapered structure, with the cross-section of the channel gradually decreasing from the inlet to the outlet. The non-condensable gas separation area is equipped with a light gas floating guide plate to guide the separation of non-condensable gases. The tapering spiral channel extends the residence time of steam within the channel while gradually increasing the steam velocity, enhancing heat exchange with the channel walls and improving condensation recovery rate. The inclined design of the light gas flotation guide plate guides non-condensable gases to quickly accumulate at the top of the separation zone and discharge through a dedicated outlet, preventing the accumulation of non-condensable gases within the channel and thus avoiding impact on heat exchange efficiency. The integrated structural design reduces component connection points, lowers the risk of leakage, simplifies equipment installation and maintenance, and adapts to compact system layout requirements.

[0011] Preferably, the honeycomb flow guiding unit of the honeycomb flow guiding and magnetic descaling component is made of corrosion-resistant polymer material, and the internal flow guiding channels are arranged in a hexagonal pattern. The magnetic descaling unit is embedded inside the honeycomb structure, and the arrangement of scale ions in the water is changed by the action of a strong magnetic field. Corrosion-resistant polymer materials can resist the erosion of hydrophobic media, extending the service life of components. Hexagonal flow channels ensure more uniform hydrophobic flow, avoiding scouring and wear caused by excessively high local flow rates and impurity deposition caused by excessively slow flow rates. Strong magnetic fields can disrupt the crystallization conditions of scale ions, making it difficult for them to form hard scale that adheres to the inner wall of the equipment. At the same time, they can disperse existing microscale particles, facilitating subsequent drainage and reducing the risk of scale buildup in the equipment from the source, thus reducing the frequency of maintenance.

[0012] Preferably, the abnormal operating condition return switching unit includes an emergency return valve, a flow monitor and a control module. The flow monitor monitors the flow change of the reuse branch in real time. When the flow is lower than the preset range or the water quality monitoring unit sends an over-standard signal, the control module immediately triggers the emergency return valve to open and guide the condensate back to the condensate tank. The control module adopts a priority judgment logic. When receiving signals of both abnormal flow and excessive water quality at the same time, it preferentially executes the reflux operation. The emergency reflux valve adopts a structural design with excellent sealing performance. After being opened, it can quickly cut off the reuse branch and conduct the reflux channel, avoiding unqualified hydrophobic water from flowing into subsequent equipment. At the same time, the unit is equipped with an alarm device, which issues a warning in time when the reflux operation is triggered, facilitating the staff to troubleshoot faults and ensuring the overall safe operation of the system.

[0013] Preferably, the heating coil is configured with a heat preservation sheath and a heat transfer enhancement coating. The heat preservation sheath is made of a flame-retardant and heat-insulating material, and the heat transfer enhancement coating is coated on the inner wall of the coil; The flame-retardant and heat-insulating material can effectively reduce the heat loss in the coil, reduce energy consumption, and at the same time avoid potential safety hazards caused by too high outer wall temperature, meeting the safety requirements of high-temperature heating conditions. The heat transfer enhancement coating has good thermal conductivity, can increase the heat transfer area between the inner wall of the coil and the medium, improve the heat transfer efficiency, shorten the heating time, and reduce the operating load of the circulation pump and heating equipment. The coating also has certain corrosion resistance and wear resistance, can resist the erosion of the medium, and extend the service life of the heating coil.

[0014] Preferably, the temperature and flow rate coordinated control three-way valve is internally provided with a wear-resistant sealing valve seat and a flow rate balancing hole. The wear-resistant sealing valve seat is made of ceramic material, and the flow rate balancing hole is used to balance the flow resistance of the two heating media; The valve seat made of ceramic material has extremely high wear resistance and sealing performance, can withstand the erosion of the two heating media and the loss caused by temperature changes, effectively avoid medium leakage, and extend the service life of the valve. The flow rate balancing hole is designed according to the physical properties of steam and hydrophobic water, can specifically adjust the flow resistance of the two media, and avoid the problem of uneven flow distribution caused by differences in medium viscosity and pressure. At the same time, the internal structure of the valve has been optimized, reducing the eddy current phenomenon during the flow of the medium, reducing energy loss, and improving the control accuracy of the valve.

[0015] Preferably, the multi-parameter water quality closed-loop monitoring unit and the system linkage control module establish a data interaction channel, and transmit the water quality monitoring data to the control module in real time. The control module adjusts the rotation speed of the circulation pump and the opening degree of the reuse branch valve in combination with the operating state of the equipment, realizing the dynamic matching of water quality, flow rate and equipment requirements; The data interaction channel adopts a two-way transmission mode. The control module can not only receive the monitoring data, but also send parameter adjustment instructions to the monitoring unit, meeting the monitoring requirements of different operating conditions. By dynamically adjusting the rotation speed of the circulation pump, the hydrophobic circulation flow rate can be changed, and in combination with the adjustment of the opening degree of the reuse branch valve, it is ensured that under the premise of meeting the water quality standard, the hydrophobic resources are utilized to the maximum extent. This linkage control method makes the system operation more flexible, can optimize parameters in real time according to equipment load and water quality changes, and improve the overall energy efficiency and operation stability of the system.

[0016] Compared with the prior art, the present invention provides a urea hydrolysis system with the following advantages: This urea hydrolysis system utilizes a closed-loop circuit consisting of a urea dissolving tank, a urea solution storage tank, a urea hydrolyzer, a heating coil, a condensate tank, a buffer tank, and a circulating pump. Combined with bidirectional flow regulation and anti-cavitation components between the circulating pump inlet and the buffer tank, the system uses a circulating pump to drive forced hot water circulation, which stably maintains the system temperature range and avoids pump cavitation, ensuring continuous hot water circulation. A three-way valve, controlling the temperature and flow at the heating coil inlet and condensate outlet, enables adaptive switching between steam and condensate heating, precisely matching heating requirements and reducing steam consumption. Furthermore, a condensate reuse branch at the circulating pump outlet and multi-parameter closed-loop water quality monitoring further enhance the system's performance. The unit enables gradient utilization of condensate, improving the overall efficiency of water and heat utilization; the steam capture and condensation recovery device at the exhaust end of the condensate tank can efficiently condense and recover steam and separate non-condensable gases, reducing steam loss; the honeycomb flow guide and magnetic descaling components in the buffer tank can guide the uniform flow of condensate and remove scale and impurities, reducing scale buildup in pipelines and equipment, ensuring flowability, and extending equipment life; the abnormal operating condition recirculation switching unit between the reuse branch and the condensate tank can automatically recirculate condensate when water quality is abnormal, reducing steam leakage from the condensate tank from the source, avoiding abnormal system operation, and reducing heat loss, thus improving the overall stability, energy efficiency, and economy of the system. Attached Figure Description

[0017] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a technical solution, a urea hydrolysis system. Please refer to [link / reference]. Figure 1 The hot water circulation and insulation module of the condensate tank consists of a urea dissolving tank, a urea solution storage tank, a urea hydrolyzer, a heating coil, a condensate tank, a buffer tank, and a circulation pump forming a closed loop. A bidirectional flow regulation and anti-cavitation component is connected in series between the inlet of the circulation pump and the buffer tank. The hot water in the condensate tank is forced to circulate through the circulation pump. It enables the hot water in the condensate tank to form a stable circulating and heat-insulating flow field within the system, ensuring that the temperature of the urea hydrolysis-related tanks and hydrolyzers is maintained within a suitable range. At the same time, the bidirectional flow regulation and anti-cavitation components can effectively avoid the cavitation problem of the circulating pump, ensuring the continuity and stability of the hot water circulation. Intelligent switching module for heating medium: A three-way valve with coordinated temperature and flow control is installed at the inlet of the heating coil and the outlet of the condensate tank. The inlet is connected to the steam pipe and the hot water pipe of the condensate tank respectively, and the outlet is connected to the heating coil to realize adaptive switching between steam heating and condensate heating. It can accurately match the heating medium according to the actual temperature and heating requirements of the system, reduce unnecessary steam consumption, and improve the energy efficiency and adaptability of the system heating. Gradient hydrophobic reuse control module: A hydrophobic reuse branch is set at the outlet of the circulating pump, and a multi-parameter water quality closed-loop monitoring unit is integrated to collect water quality data in real time and match different reuse scenarios to realize the hydrophobic gradient utilization. It can maximize the utilization value of drainage, reduce the waste of drainage, and improve the comprehensive utilization rate of water resources and thermal energy; Steam condensation recovery enhancement module: A steam capture and condensation recovery device with a spiral condenser and non-condensable gas separation integrated component that is sealed at the exhaust end of the condensate tank, extends the steam residence time and separates non-condensable gases; It can efficiently capture the steam discharged from the condensate tank and condense it for reuse, while separating non-condensable gases to prevent them from affecting the condensation effect, thus greatly reducing the loss of steam. Hydrophobic and anti-scaling pretreatment module: The buffer tank is equipped with a honeycomb flow guide and magnetic descaling components to guide the hydrophobic flow evenly and intercept and remove impurities that cause scaling. It enables hydrophobic fluid to form a uniform flow pattern in the buffer tank, avoiding the deposition of impurities caused by uneven local flow rates. At the same time, the magnetic descaling component can remove impurities that easily cause scaling from the source, reducing scaling problems in pipelines and equipment such as heating coils and circulating pumps, ensuring pipeline flow and equipment operating performance, and extending the service life of the equipment. System emergency protection module: An abnormal operating condition backflow switching unit is set between the reuse branch and the condensate tank. When the water quality is abnormal, the condensate is automatically returned to reduce the amount of steam escaping from the condensate tank from the source. It can reduce steam leakage from the condensate tank at the source, avoid system malfunctions caused by the reuse of substandard condensate, and reduce heat loss and on-site environmental problems caused by steam escape. It comprehensively improves the stability, energy efficiency and economy of the urea hydrolysis system and ensures the coordinated and efficient operation of all system components.

[0020] The bidirectional flow regulation and anti-cavitation component includes a flow sensor, an adjustable flow valve, and a cavitation protection chamber. The flow sensor monitors the circulating flow in real time and feeds back to the adjustable flow valve. The cavitation protection chamber suppresses cavitation at the inlet of the circulating pump through a negative pressure buffer structure. These three components form a closed-loop linkage control system. The flow sensor transmits monitoring data to the control system in real time, and the adjustable flow valve precisely fine-tunes its opening based on feedback to ensure that the circulating flow rate remains stable within a reasonable range. The negative pressure buffer structure inside the cavitation protection chamber can quickly absorb pressure fluctuations on the inlet side, preventing the formation of bubbles due to local negative pressure. At the same time, it reduces the impact and wear of bubbles on the pump impeller, adapting to complex operating conditions such as system start-up and shutdown and load changes, ensuring long-term stable operation of the circulating pump, and improving the reliability of the entire hot water circulation loop.

[0021] The temperature and flow coordinated control three-way valve establishes a wired signal linkage with the temperature monitoring element of related equipment, and dynamically adjusts the valve opening ratio by collecting real-time temperature of the solution and condensate circulation flow data in the equipment; Wired signal linkage offers advantages such as stable transmission and low latency, avoiding control deviations caused by environmental interference in wireless transmission. The control system performs collaborative analysis of collected temperature and flow data to accurately determine heating requirements. When the solution temperature is low, it increases the steam inlet opening and decreases the condensate inlet ratio; when the temperature approaches the set value, it gradually switches to condensate heating, ensuring heating efficiency, maximizing the utilization of waste heat, and avoiding the impact of sudden temperature changes caused by medium switching on equipment and solution stability.

[0022] The multi-parameter water quality closed-loop monitoring unit integrates pH value and suspended solids content monitoring functions, and is equipped with a data storage and trend analysis sub-module to provide early warning of potential exceedance risks by analyzing water quality change trends. Employing an online real-time monitoring mode, the system eliminates the need for manual sampling and testing, significantly improving monitoring efficiency and reducing human error. The data storage submodule retains long-term water quality data, providing a basis for subsequent system optimization and fault tracing. The trend analysis submodule, through fitting and analyzing historical data, can capture subtle patterns in water quality changes and issue early warning signals before indicators approach exceed thresholds. Simultaneously, the monitoring unit is linked to the reuse branch valves, automatically switching reuse paths based on water quality levels to ensure that reused water meets standards in different scenarios.

[0023] The spiral condensation channel of the integrated spiral condenser and non-condensable gas separation component adopts a tapered structure, with the cross-section of the channel gradually decreasing from the inlet to the outlet. The non-condensable gas separation area is equipped with a light gas floating guide plate to guide the separation of non-condensable gases. The tapering spiral channel extends the residence time of steam within the channel while gradually increasing the steam velocity, enhancing heat exchange with the channel walls and improving condensation recovery rate. The inclined design of the light gas flotation guide plate guides non-condensable gases to quickly accumulate at the top of the separation zone and discharge through a dedicated outlet, preventing the accumulation of non-condensable gases within the channel and thus avoiding impact on heat exchange efficiency. The integrated structural design reduces component connection points, lowers the risk of leakage, simplifies equipment installation and maintenance, and adapts to compact system layout requirements.

[0024] The honeycomb flow guiding unit of the honeycomb flow guiding and magnetic descaling component is made of corrosion-resistant polymer material. The internal flow guiding channels are arranged in a hexagonal pattern. The magnetic descaling unit is embedded in the honeycomb structure and changes the arrangement of scale ions in the water through the action of a strong magnetic field. Corrosion-resistant polymer materials can resist the erosion of hydrophobic media, extending the service life of components. Hexagonal flow channels ensure more uniform hydrophobic flow, avoiding scouring and wear caused by excessively high local flow rates and impurity deposition caused by excessively slow flow rates. Strong magnetic fields can disrupt the crystallization conditions of scale ions, making it difficult for them to form hard scale that adheres to the inner wall of the equipment. At the same time, they can disperse existing microscale particles, facilitating subsequent drainage and reducing the risk of scale buildup in the equipment from the source, thus reducing the frequency of maintenance.

[0025] The abnormal operating condition return switching unit includes an emergency return valve, a flow monitor and a control module. The flow monitor monitors the flow change of the reuse branch in real time. When the flow is lower than the preset range or the water quality monitoring unit sends an over-standard signal, the control module immediately triggers the emergency return valve to open and guide the condensate back to the condensate tank. The control module employs priority-based logic, prioritizing the backflow operation when both abnormal flow and excessive water quality signals are received simultaneously. The emergency backflow valve features a high-sealing design, quickly cutting off the reuse branch and opening the backflow channel upon opening, preventing substandard condensate from flowing into downstream equipment. Additionally, the unit is equipped with an alarm device that promptly alerts staff when the backflow operation is triggered, facilitating troubleshooting and ensuring the overall safe operation of the system.

[0026] The heating coil is equipped with an insulation sleeve and a heat exchange enhancement coating. The insulation sleeve is made of flame-retardant and heat-insulating material, and the heat exchange enhancement coating is applied to the inner wall of the coil. Flame-retardant and heat-insulating materials effectively reduce heat loss within the coil, lowering energy consumption and preventing safety hazards caused by excessively high external wall temperatures, thus meeting the safety requirements of high-temperature heating conditions. The heat exchange-enhancing coating possesses excellent thermal conductivity, increasing the heat exchange area between the coil's inner wall and the medium, improving heat exchange efficiency, shortening heating time, and reducing the operating load on the circulating pump and heating equipment. The coating also exhibits certain corrosion and wear resistance, resisting media erosion and extending the service life of the heating coil.

[0027] The temperature and flow coordinated control three-way valve is equipped with a wear-resistant sealing valve seat and a flow equalization orifice. The wear-resistant sealing valve seat is made of ceramic material, and the flow equalization orifice is used to balance the flow resistance of the two heating media. The ceramic valve seat has extremely high wear resistance and sealing performance, can withstand the erosion of two heating media and the losses caused by temperature changes, effectively avoid medium leakage, and extend the service life of the valve. The flow equalizing holes are designed according to the physical properties of steam and drain water, and can specifically adjust the flow resistance of the two media to avoid uneven flow distribution caused by differences in medium viscosity and pressure. At the same time, the internal structure of the valve is optimized to reduce the eddy current phenomenon during medium flow, reduce energy loss, and improve the valve control accuracy.

[0028] The multi-parameter water quality closed-loop monitoring unit and the system linkage control module establish a data interaction channel, and transmit the water quality monitoring data to the control module in real time. The control module adjusts the rotational speed of the circulating pump and the opening degree of the reuse branch valve in combination with the equipment operation status to achieve dynamic matching of water quality, flow rate and equipment requirements. The data interaction channel adopts a two-way transmission mode. The control module can not only receive monitoring data, but also send parameter adjustment instructions to the monitoring unit to adapt to the monitoring requirements of different operating conditions. By dynamically adjusting the rotational speed of the circulating pump, the drain water circulation flow rate can be changed, and in combination with the adjustment of the opening degree of the reuse branch valve, it is ensured that under the premise of meeting the water quality standards, the drain water resources are utilized to the maximum extent. This linkage control method makes the system operation more flexible, can optimize parameters in real time according to equipment load and water quality changes, and improve the overall energy efficiency and operation stability of the system.

[0029] In this solution: when the urea hydrolysis system is running, the hot water in the drain water tank is stably circulated by the circulating pump through the bidirectional flow regulation and anti-cavitation component to form a heat preservation flow field to maintain the temperature of related equipment; the heating medium intelligent switching module coordinates and controls the three-way valve according to temperature and flow rate, and adaptively switches between steam and drain water heating; the gradient drain water reuse control module realizes gradient utilization of drain water by real-time monitoring of water quality through the multi-parameter water quality closed-loop monitoring unit; the steam condensation recovery enhancement module uses the spiral condensation and non-condensable gas separation integrated component to capture the condensed steam; the drain water anti-scaling pretreatment module reduces equipment scaling with the help of the honeycomb flow guide and magnetic anti-scaling component; in case of abnormal conditions, the abnormal condition return switching unit guides the unqualified drain water back to the drain water tank; at the same time, each module exchanges data with the system linkage control module and dynamically adjusts parameters to comprehensively improve the operation stability, energy saving and economy of the system.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A urea hydrolysis system, characterized in that, include: The hot water circulation and insulation module of the condensate tank consists of a urea dissolving tank, a urea solution storage tank, a urea hydrolyzer, a heating coil, a condensate tank, a buffer tank, and a circulation pump, forming a closed loop. A bidirectional flow regulation and anti-cavitation component is connected in series between the inlet of the circulation pump and the buffer tank. The hot water in the condensate tank is forced to circulate through the circulation pump. Intelligent switching module for heating medium: A three-way valve with coordinated temperature and flow control is installed at the inlet of the heating coil and the outlet of the condensate tank. The inlet is connected to the steam pipe and the hot water pipe of the condensate tank respectively, and the outlet is connected to the heating coil to realize adaptive switching between steam heating and condensate heating. Gradient hydrophobic reuse control module: A hydrophobic reuse branch is set at the outlet of the circulating pump, and a multi-parameter water quality closed-loop monitoring unit is integrated to collect water quality data in real time and match different reuse scenarios to realize the hydrophobic gradient utilization. Steam condensation recovery enhancement module: A steam capture and condensation recovery device with a spiral condenser and non-condensable gas separation integrated component that is sealed at the exhaust end of the condensate tank, extends the steam residence time and separates non-condensable gases; Hydrophobic and anti-scaling pretreatment module: The buffer tank is equipped with a honeycomb flow guide and magnetic descaling components to guide the hydrophobic flow evenly and intercept and remove impurities that cause scaling. The system emergency protection module is equipped with an abnormal operating condition backflow switching unit between the reuse branch and the condensate tank. When the water quality is abnormal, the condensate is automatically redirected back to reduce the amount of steam escaping from the condensate tank at the source.

2. The urea hydrolysis system according to claim 1, characterized in that: The bidirectional flow regulation and anti-cavitation component includes a flow sensor, an adjustable flow valve, and a cavitation protection chamber. The flow sensor monitors the circulating flow in real time and feeds back to the adjustable flow valve. The cavitation protection chamber suppresses cavitation at the inlet of the circulating pump through a negative pressure buffer structure.

3. The urea hydrolysis system according to claim 1, characterized in that: The temperature and flow rate coordinated control three-way valve establishes a wired signal linkage with the temperature monitoring element of related equipment, and dynamically adjusts the valve opening ratio by collecting real-time temperature of the solution and hydrophobic circulation flow data in the equipment.

4. The urea hydrolysis system according to claim 1, characterized in that: The multi-parameter water quality closed-loop monitoring unit integrates pH value and suspended solids content monitoring functions, and is equipped with a data storage and trend analysis sub-module. By analyzing water quality change trends, it can provide early warning of potential exceedance risks.

5. The urea hydrolysis system according to claim 1, characterized in that: The spiral condensation channel of the integrated spiral condensation and non-condensable gas separation component adopts a tapered structure, with the cross-section of the channel gradually decreasing from the inlet to the outlet. The non-condensable gas separation area is equipped with a light gas floating guide plate to guide the separation of non-condensable gases.

6. The urea hydrolysis system according to claim 1, characterized in that: The honeycomb flow guiding unit of the honeycomb flow guiding and magnetic descaling component is made of corrosion-resistant polymer material, and the internal flow guiding channels are arranged in a hexagonal pattern. The magnetic descaling unit is embedded inside the honeycomb structure and changes the arrangement of scale ions in the water through the action of a strong magnetic field.

7. The urea hydrolysis system according to claim 1, characterized in that: The abnormal operating condition return switching unit includes an emergency return valve, a flow monitor, and a control module. The flow monitor monitors the flow change of the reuse branch in real time. When the flow is lower than the preset range or the water quality monitoring unit sends an over-standard signal, the control module immediately triggers the emergency return valve to open and guide the condensate back to the condensate tank.

8. The urea hydrolysis system according to claim 1, characterized in that: The heating coil is equipped with an insulation sleeve and a heat exchange enhancement coating. The insulation sleeve is made of flame-retardant and heat-insulating material, and the heat exchange enhancement coating is applied to the inner wall of the coil.

9. A urea hydrolysis system according to claim 1, characterized in that: The temperature and flow coordinated control three-way valve is equipped with a wear-resistant sealing valve seat and a flow equalization orifice. The wear-resistant sealing valve seat is made of ceramic material, and the flow equalization orifice is used to balance the flow resistance of the two heating media.

10. A urea hydrolysis system according to claim 1, characterized in that: The multi-parameter water quality closed-loop monitoring unit establishes a data interaction channel with the system linkage control module, transmitting water quality monitoring data to the control module in real time. The control module adjusts the speed of the circulating pump and the opening of the reuse branch valve based on the equipment operating status, so as to achieve dynamic matching of water quality, flow rate and equipment requirements.

Images