A desulfurization process water system utilizing condenser circulating water

Abstract

This utility model discloses a desulfurization process water system utilizing condenser circulating water. A circulating water inlet pipe is connected to the lower part of the condenser, and a circulating water return pipe is connected to the upper part of the condenser. A high-level connection is made between the inlet water pipe and the circulating water return pipe. A first on / off valve is installed on the inlet water pipe. The inlet water pipe is connected to a water tank to supply water to the tank. The water tank is connected to a first outlet water pipe, which is connected to the desulfurization tower. A makeup water pipe is connected to the water tank. This solution utilizes the pressure of the condenser circulating water itself to achieve water tank makeup, improve desulfurization efficiency, and optimize circulating water system parameters.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization technology, and in particular to a desulfurization process water system that utilizes condenser circulating water. Background Technology

[0002] In sintering waste heat power generation, thermal power generation, and some industrial production processes, the condenser circulating water system and the desulfurization process water tank makeup water and desulfurization efficiency assurance are often independent and lack coordination. On the one hand, the desulfurization process water tank routine makeup water relies heavily on fresh water, resulting in water waste, and the circulating water return water's temperature and air resistance affect system stability and desulfurization efficiency. On the other hand, adding additional water pumps to transport circulating water increases equipment costs and energy consumption. Therefore, there is an urgent need for a system that integrates circulating water utilization and desulfurization process optimization without requiring additional power.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] In response to the problems pointed out in the background art, this utility model proposes a desulfurization process water system that utilizes condenser circulating water. By leveraging the pressure of the condenser circulating water itself, it achieves water replenishment to the process water tank, helps improve desulfurization efficiency, and optimizes the parameters of the circulating water system.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] In some embodiments of this application, a desulfurization process water system using condenser circulating water is provided. A circulating water inlet pipe is connected to the lower part of the condenser, and a circulating water return pipe is connected to the upper part of the condenser. A water inlet pipe and a circulating water return pipe are connected at a high position. A first on / off valve is installed on the water inlet pipe. The water inlet pipe is connected to a water tank to supply water to the water tank. The water tank is connected to a first water outlet pipe, which is connected to the desulfurization tower. A water makeup pipe is connected to the water tank.

[0007] In some embodiments of this application, a level gauge is provided in the water tank, and the desulfurization process water system further includes a PLC system, which is configured to control the opening or closing of the first on / off valve based on the detection data of the level gauge.

[0008] In some embodiments of this application, a first flow meter is provided on the water intake pipe.

[0009] In some embodiments of this application, a plurality of circulating water inlet pipes are connected to the lower part of the condenser, a plurality of circulating water return pipes are connected to the upper part of the condenser, and a second water outlet pipe is connected to the upper part of each of the plurality of circulating water return pipes. A second on / off valve is provided on any of the second water outlet pipes, and the second water outlet pipe is connected to the water inlet pipe.

[0010] In some embodiments of this application, an exhaust pipe is also connected to the upper part of the circulating water return pipe.

[0011] In some embodiments of this application, a third on / off valve is provided on the water supply pipe.

[0012] In some embodiments of this application, a second flow meter is provided on the water supply pipe.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are:

[0014] This system introduces the condenser's circulating water return into the water tank via a water inlet pipe, serving as the primary source of makeup water for the desulfurization process, replacing the traditional method of relying on fresh water. This design directly reduces the need for fresh water, avoiding water waste, and is particularly suitable for industrial scenarios sensitive to water consumption, such as sintering waste heat power generation and thermal power generation, aligning with industry development requirements for energy conservation and emission reduction.

[0015] The circulating water return can flow into the water tank through the intake pipe using its own pressure, eliminating the need for additional pumps or other power transmission equipment. This not only reduces the cost of equipment procurement, installation, and maintenance but also avoids energy consumption caused by the operation of additional equipment, thereby lowering the overall operating cost of the desulfurization process system and improving the economic efficiency of industrial production.

[0016] The circulating water returned to the tank carries approximately 30°C of residual heat. This temperature condition is more conducive to the digestion reaction of quicklime in the desulfurization tower, accelerating the reaction process and improving reaction efficiency, thereby enhancing the desulfurization effect. Simultaneously, the system automatically controls the replenishment of the circulating water return based on the tank level via the first on / off valve, avoiding fluctuations in the desulfurization process caused by unstable water replenishment and ensuring the stability of the desulfurization system operation.

[0017] Since the recycled water is introduced into the desulfurization system for use, the circulating water pool needs to be replenished with fresh water to maintain water balance. This process lowers the temperature and concentration ratio of the circulating water. Lower temperatures reduce the thermal stress of the circulating water on equipment such as condensers, while lower concentration ratios reduce salt crystallization and fouling in the water, alleviating equipment corrosion and scaling problems, extending equipment lifespan, and reducing system failure rate and maintenance workload.

[0018] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a desulfurization process water system using condenser circulating water according to some embodiments.

[0021] Figure label:

[0022] 1. Condenser; 2. Second shut-off valve; 3. Water inlet pipe; 4. Circulating water return pipe; 5. Exhaust pipe; 6. Circulating water inlet pipe; 7. First shut-off valve; 8. First flow meter; 9. Water tank; 10. Level gauge; 11. First outlet pipe; 12. PLC system; 13. Make-up water pipe; 14. Second outlet pipe; 15. Third shut-off valve; 16. Second flow meter; 17. Desulfurization tower. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0029] In some embodiments of this application, a desulfurization process water system utilizing condenser circulating water is provided, with reference to... Figure 1 It consists of a condenser 1, a water inlet pipe 3, a first shut-off valve 7, a water tank 9, a water supply pipe 13, etc.

[0030] The desulfurization process water system includes a condenser 1, with a circulating water inlet pipe 6 connected to the lower part of the condenser 1 and a circulating water return pipe 4 connected to the upper part of the condenser 1. Circulating water flows into the condenser 1 through the circulating water inlet pipe 6, undergoes heat exchange in the condenser 1, and then flows into the circulating water return pipe 4.

[0031] The desulfurization process water system also includes a water intake pipe 3, which is connected at an elevated position to the circulating water return pipe 4.

[0032] The desulfurization process water system also includes a first on / off valve 7, which is installed on the water inlet pipe 3 and configured to control the opening and closing of the water inlet pipe 3. For example, the first on / off valve 7 is an electrically operated regulating valve.

[0033] The desulfurization process water system also includes a water tank 9, and the water inlet pipe 3 is connected to the water tank 9 to supply water to the water tank 9. The water tank 9 is connected to a first water outlet pipe 11, which is connected to the desulfurization tower 17.

[0034] The desulfurization process water system also includes a water replenishment pipe 13, which is connected to the water tank 9. The water replenishment pipe 13 is configured to replenish the water tank 9 with fresh water when the liquid level in the water tank 9 is abnormal.

[0035] When the desulfurization process water system is running, if the liquid level in water tank 9 is lower than the first set liquid level, the first on-off valve 7 opens, and the circulating water return flows into water tank 9 through the water inlet pipe under its own pressure. When the liquid level in water tank 9 rises to the second set liquid level, the first on-off valve 7 closes, stopping the water supply to water tank 9.

[0036] Water in tank 9, carrying residual heat (approximately 30°C), enters desulfurization tower 17 through the first outlet pipe 11, aiding in the digestion of quicklime and improving desulfurization efficiency. Meanwhile, since the circulating water is used in tank 9, tank 9 does not need to be replenished with new water, while the circulating water pool needs to be continuously replenished with new water. This operation reduces water consumption, lowers the temperature and concentration ratio of the circulating water, and optimizes the operation of the circulating water system.

[0037] This system introduces the circulating water return from condenser 1 into water tank 9 via water inlet pipe 3, serving as the main makeup water source for the desulfurization process and replacing the traditional method of relying on fresh water. This design directly reduces the need for fresh water, avoids water waste, and is particularly suitable for industrial scenarios such as sintering waste heat power generation and thermal power generation, which are sensitive to water consumption, thus meeting the industry's requirements for energy conservation and emission reduction.

[0038] The circulating water return can flow into the water tank 9 through the water inlet pipe 3 using its own pressure, without the need for additional water pumps or other power transmission equipment. This not only reduces the cost of equipment procurement, installation, and maintenance, but also avoids the energy consumption caused by the operation of additional equipment, thereby reducing the overall operating cost of the desulfurization process system and improving the economic efficiency of industrial production.

[0039] The circulating water returned to tank 9 carries approximately 30°C of residual heat. This temperature condition is more conducive to the digestion reaction of quicklime in desulfurization tower 17, accelerating the reaction process and improving reaction efficiency, thereby enhancing the desulfurization effect. Simultaneously, the system automatically controls the replenishment of circulating water returned to tank 9 based on the liquid level in tank 9 via the first on / off valve 7, avoiding fluctuations in the desulfurization process caused by unstable water replenishment and ensuring the stability of the desulfurization system operation.

[0040] Since the recycled water is introduced into the desulfurization system for use, the circulating water pool needs to be replenished with fresh water to maintain water balance. This process reduces the temperature and concentration ratio of the circulating water. The lower temperature reduces the thermal stress of the circulating water on equipment such as condenser 1, while the reduced concentration ratio reduces salt crystallization and fouling in the water, alleviates equipment corrosion and scaling problems, extends equipment service life, and reduces system failure rate and maintenance workload.

[0041] In some embodiments of this application, a level gauge 10 is provided in the water tank 9, and the desulfurization process water system further includes a PLC system 12, which is configured to control the opening or closing of the first on / off valve 7 based on the detection data of the level gauge 10.

[0042] During the operation of the desulfurization process water system, the level gauge 10 monitors the liquid level in the water tank 9 in real time and feeds the monitoring data back to the PLC system 12. When the liquid level in the water tank 9 is lower than the first set liquid level, the PLC system 12 issues a command to open the first on / off valve 7, and the circulating water return flows into the water tank 9 through the water inlet pipe under its own pressure. When the liquid level in the water tank 9 rises to the second set liquid level, the PLC system 12 issues a command to close the first on / off valve 7, stopping the water supply to the water tank 9.

[0043] The level gauge 10 can detect the changes in the liquid level in the water tank 9 in real time and accurately, and feed the continuous liquid level data back to the PLC system in real time in the form of electrical signals. This realizes dynamic monitoring of the liquid level in the water tank 9, avoids the lag and error that may exist in traditional manual inspection, and provides an accurate and reliable data source for the automated control of the system.

[0044] The PLC system can quickly process the data fed back by the level gauge 10 according to the preset control strategy. When the system is running, if the liquid level in the water tank 9 is lower than the first set liquid level, the PLC system will immediately recognize this signal and automatically send an opening command to the first on / off valve 7. At this time, the circulating water return water flows smoothly into the water tank 9 through the water inlet pipe 3 under its own pressure, realizing timely water replenishment of the water tank 9, ensuring the continuous supply of water for the desulfurization process, and avoiding insufficient water supply to the desulfurization tower 17 due to low liquid level, which would affect the desulfurization efficiency.

[0045] When the liquid level in water tank 9 rises to the second preset level, the PLC system will quickly respond to this signal and promptly issue a closing command to the first on / off valve 7 to terminate the replenishment of circulating water. This process can precisely control the liquid level in water tank 9 within a reasonable range, preventing water waste caused by excessive replenishment leading to overflow of water tank 9, while also avoiding pressure shocks to water tank 9 and subsequent pipelines caused by excessive inflow of circulating water, thus ensuring the stability of system operation.

[0046] Through the coordinated operation of the level gauge 10 and the PLC system, the entire water replenishment process is fully automated and requires no manual intervention. This not only reduces the labor intensity of operators and the possibility of human error, but also significantly improves the timeliness of system response and control accuracy.

[0047] In some embodiments of this application, a first flow meter 8, such as an electromagnetic flow meter, is installed on the water inlet pipe 3. The first flow meter 8 monitors the flow rate in real time, and the feedback data is used for system monitoring and adjustment.

[0048] In some embodiments of this application, a plurality of circulating water inlet pipes 6 are connected to the lower part of the condenser 1, a plurality of circulating water return pipes 4 are connected to the upper part of the condenser 1, and a second water outlet pipe is connected to the upper part of each of the plurality of circulating water return pipes 4. A second on / off valve 2 is provided on any of the second water outlet pipes 14, and the second water outlet pipe 14 is connected to the water inlet pipe.

[0049] The configuration of multiple circulating water inlet pipes 6 ensures a sufficient and stable supply of circulating water to the condenser 1. Even if one of the inlet pipes experiences a temporary failure (such as blockage or leakage), the remaining pipes can still supply water normally, ensuring that the heat exchange function of the condenser 1 is not significantly affected, thus laying the foundation for the stable production of subsequent circulating water return water. Correspondingly, the configuration of multiple circulating water return pipes 4 further enhances the system's redundancy. An abnormality in a single return pipe will not cause an interruption in the circulating water return water supply, effectively reducing the risk of desulfurization process water replenishment interruption caused by pipe failure.

[0050] The high-level connection of the second outlet pipe 14 to each circulating water return pipe 4 plays a crucial role. This high-level connection design fully utilizes the pressure potential energy of the circulating water return itself, reducing energy loss during water transport and ensuring smooth water flow into the intake pipe 3. Simultaneously, the second on / off valve 2 on each second outlet pipe 14 can be independently controlled, allowing operators to flexibly adjust the opening or closing of the corresponding valve according to the actual operating conditions of each return pipe (such as flow rate, pressure, and water quality). For example, when the water parameters in a certain circulating water return pipe 4 do not meet the requirements of the desulfurization process, its corresponding second on / off valve 2 can be closed to prevent substandard water from entering the water tank 9; while other pipes are operating normally, the continuous replenishment of circulating water return can still be guaranteed, achieving precise utilization of water resources and flexible system scheduling.

[0051] Furthermore, this multi-pipeline, multi-valve design facilitates system maintenance and repair. When maintaining a specific circulating water return pipe 4 or the second on / off valve 2, the corresponding valve can be closed while other pipes continue to operate normally, without interrupting the operation of the entire desulfurization process water system. This significantly improves the system's maintainability and continuous operation capability, and reduces production losses caused by maintenance.

[0052] In some embodiments of this application, an exhaust pipe 5 is also connected to the upper part of the circulating water return pipe 4. The water inlet pipe 3 continuously or intermittently transports circulating water, disrupting the conditions for air resistance formation in the condenser circulating water return pipe 4, eliminating the need for manual operation of the exhaust pipe 5 to vent air, thus simplifying operation and maintenance.

[0053] After the circulating water completes heat exchange in the condenser 1, it flows into the circulating water return pipe 4. Due to factors such as temperature changes and water flow disturbances, air easily accumulates in the pipe, forming airlocks. Airlocks increase water flow resistance, affecting the normal flow of circulating water, thereby reducing the heat exchange efficiency of the condenser 1 and the overall operational stability of the circulating water system. In severe cases, it may even cause a partial vacuum in the pipe, leading to pipe vibration or damage. In traditional methods, manual operation of the vent pipe 5 is often required to vent air, which not only increases the workload of operators but may also cause airlock problems to recur due to untimely venting or improper operation.

[0054] In this scheme, the water intake pipe 3 continuously or intermittently draws circulating water from the high position of the circulating water return pipe 4. This process continuously disturbs the water flow in the return pipe. This disturbance disrupts the stable conditions that allow air to accumulate in the pipe and form airlocks, allowing any air that might otherwise accumulate to be carried away by the water flow and naturally discharged through the exhaust pipe 5 without human intervention. For example, when the water intake pipe 3 continuously delivers circulating water, the water flow in the return pipe always maintains a certain flow rate and disturbance state, making it difficult for air to accumulate stably in the high-level area. Even if the water intake pipe 3 delivers water intermittently, the water flow impact during each delivery will break the existing airlock formation trend. Combined with the exhaust function of the exhaust pipe 5, this effectively prevents the formation of airlocks.

[0055] Furthermore, this design significantly simplifies system operation and maintenance. It eliminates the need for regular manual operation of the exhaust pipe, reducing the frequency and difficulty of human intervention, lowering the risk of human error, and saving labor costs.

[0056] In some embodiments of this application, a third shut-off valve 15 is provided on the water supply pipe 13. When the water tank 9 experiences an abnormality due to anomalies (such as excessive water usage or a malfunction of the first shut-off valve 7), the third shut-off valve 15 opens, replenishing the water tank 9 with new water through the water supply pipe 13 to ensure the water supply for the desulfurization system.

[0057] Under normal circumstances, the water replenishment for the desulfurization process water tank 9 mainly relies on the circulating water return from the condenser 1. Supply and demand are balanced through the control of the water inlet pipe 3 and the first on / off valve 7. At this time, the third on / off valve 15 is closed to avoid unnecessary consumption of fresh water. However, during industrial production, the system may face various sudden abnormal situations. For example, the desulfurization tower 17 may require a large amount of water in a short period due to process adjustments, causing the water level in the tank 9 to drop sharply, exceeding the water replenishment response capacity of the first on / off valve 7; or the first on / off valve 7 may experience mechanical or electrical failures and fail to open normally, preventing the circulating water return from replenishing the water tank 9 in a timely manner. If these abnormal situations are not handled promptly, the water level in the tank 9 will continue to decrease, even leading to water shortages, which will affect the normal operation of the desulfurization tower 17, reduce desulfurization efficiency, and in severe cases, cause production interruption.

[0058] When the water level in tank 9 becomes abnormal due to the aforementioned abnormal conditions (such as falling below the safety threshold), the third shut-off valve 15 will quickly open according to preset control logic (e.g., linked with the PLC system and level gauge 10). At this time, fresh water flows rapidly into tank 9 through the water supply pipe 13, promptly making up for the water shortage and ensuring that tank 9 always maintains a sufficient water level to meet the needs of the desulfurization system. Once the water level in tank 9 returns to the normal range, the third shut-off valve 15 automatically closes, stopping the supply of fresh water, thus ensuring the continuity of the desulfurization process and preventing excessive consumption of fresh water.

[0059] Furthermore, the inclusion of the third shut-off valve 15 significantly enhances the system's fault tolerance and emergency response capabilities. As a backup water supply mechanism, it can quickly intervene when problems occur in the main water supply path (circulating water return supply), effectively reducing the risk of system paralysis due to a single point of failure. Simultaneously, this design eliminates the need for real-time manual monitoring and operation, achieving rapid response in abnormal situations through automated control. This reduces the lag and operational errors associated with manual intervention, further simplifying system operation and maintenance management and ensuring the long-term stable and efficient operation of the desulfurization system.

[0060] In some embodiments of this application, a second flow meter 16, such as an electromagnetic flow meter, is installed on the water supply pipe 13. The second flow meter 16 monitors the flow rate in real time, and the feedback data is used for system monitoring and adjustment.

[0061] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0062] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A desulfurized process water system using condenser circulating water, characterized by, Including: A condenser, wherein a circulating water inlet pipe is connected to the lower part of the condenser and a circulating water return pipe is connected to the upper part of the condenser; A water intake pipe, wherein the water intake pipe is connected at an elevated position to the circulating water return pipe; A first on / off valve is disposed on the water intake pipe and configured to control the on / off state of the water intake pipe. A water tank, wherein the water inlet pipe is connected to the water tank to supply water to the water tank, and the water tank is connected to a first water outlet pipe, which is connected to a desulfurization tower; A water supply pipe is connected to the water tank.

2. The desulfurization process water system according to claim 1, characterized in that, The water tank is equipped with a level gauge, and the desulfurization process water system also includes a PLC system. The PLC system is configured to control the opening or closing of the first on / off valve based on the detection data of the level gauge.

3. The desulfurization process water system according to claim 1, characterized in that, The water intake pipeline is equipped with a first flow meter.

4. The desulfurization process water system according to claim 1, characterized in that, The lower part of the condenser is connected to multiple circulating water inlet pipes, and the upper part of the condenser is connected to multiple circulating water return pipes. The upper part of each of the multiple circulating water return pipes is connected to a second water outlet pipe. A second on / off valve is installed on any of the second water outlet pipes, and the second water outlet pipe is connected to the water inlet pipe.

5. The desulfurization process water system according to claim 1, characterized in that, An exhaust pipe is also connected to the upper part of the circulating water return pipe.

6. The desulfurization process water system according to claim 1, characterized in that, A third shut-off valve is installed on the water supply pipe.

7. The desulfurization process water system according to claim 1, characterized in that, A second flow meter is installed on the water supply pipe.

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