A condenser circulating water feed line pressurization system for a 280 ORC condensate generator set

Abstract

The utility model discloses a kind of condenser circulating water water supply pipeline pressurizing system for 280 ORC condensate generator set, including the circulating water station being cyclically arranged, water inlet pipeline, condenser and return pipeline, circulating water pump, circulating water outlet valve and import valve are sequentially provided on the water inlet pipeline, circulating water return valve is provided on the return pipeline, liquid working medium and circulating water carry out temperature exchange in the condenser, at least one booster pump is provided on the water inlet pipeline, for the control mechanism of the start-stop and power size of the booster pump are controlled, the control mechanism is integrated in ORC condensate generator set control system, and it is controlled by DCS interface in ORC condensate generator set control system. Can improve the cooling efficiency of condenser, optimize generator set operating efficiency, improve the overall performance of generator set.

Description

Technical Field

[0001] This utility model relates to the technical field of generator sets, specifically to a pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set. Background Technology

[0002] The condensate ORC power generation unit utilizes 0.5MPa, 158℃ steam condensate as a heat source to heat a low-boiling-point organic working fluid to produce steam. This steam then enters a turbine expander to perform work, driving a generator to produce electricity. This process recovers waste heat, converts it into electrical energy, and supplies it to downstream units, achieving energy conservation, emission reduction, and environmental protection. After the working fluid completes its expansion in the turbine expander, the exhaust steam enters a condenser for heat exchange and cooling. Then, starting from the hot side outlet of the condenser, the working fluid is pumped into a regenerator, then into a preheater. The working fluid, at near-saturation temperature, enters an evaporator for evaporation, and is then recycled back into the turbine expander as condensate to perform further expansion.

[0003] With mature water treatment technology, in existing 280 condensate generator sets, the cooling effect of the condenser directly affects the operating efficiency of the generator set. However, the existing condenser circulating water supply pipeline booster system (such as...) Figure 3 (As shown) The circulating water pump at the circulating water station pumps out the water, which then flows through the outlet and inlet valves into the cooling water inlet of the condenser. After passing through the tube side, it flows back to the circulating water station from the outlet pipe, while the working fluid passes through the shell side of the condenser. The existing 280 ORC condensate generator set uses pentafluoropropane (R245fa) as the liquid working fluid. In the evaporator, it absorbs heat and evaporates into a gaseous state, driving the ORC expander to do work. The expander drives the generator set to generate electricity. After the expansion pressure decreases, the gaseous organic working fluid passes through the regenerator, then condenses into a liquid state in the condenser. It is then pressurized by the working fluid pump and returns to the regenerator for self-heating. It then enters the preheater for temperature increase and enters the evaporator to absorb heat, thus completing one ORC cycle. Because our condenser is located far from the circulating water station, resulting in severe pipeline pressure loss, and the condenser is approximately 7-10 meters high, the following problems arise when the condenser cools down with circulating water due to pipeline pressure loss and height potential energy:

[0004] 1. Insufficient water pressure: Insufficient circulating water supply pressure leads to unsatisfactory cooling effect of the condenser, affecting the thermal efficiency of the generator set.

[0005] 2. Unstable flow rate: The circulating water flow rate fluctuates greatly, which cannot meet the stable cooling requirements of the condenser. Therefore, it is necessary to reduce the power generation to maintain the continuous operation of the condensate generator set, making it difficult to make the generator set operate at full load.

[0006] 3. High energy consumption: The main factors affecting power generation in the entire power generation system are: circulating water, condensate (condensate volume and condensate temperature), working fluid mass, and working fluid pump frequency. The working fluid mass is currently a fixed quantity, which means that the working fluid pump frequency is also fixed. If the circulating water cooling efficiency is insufficient, more condensate is needed to achieve a certain power generation. Therefore, the traditional water supply system is inefficient, leading to increased energy consumption and high operating costs. Utility Model Content

[0007] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set, which can improve the cooling efficiency of the condenser, optimize the operating efficiency of the generator set, and enhance the overall performance of the generator set.

[0008] To solve the aforementioned technical problems, this application adopts the following technical solution:

[0009] A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set includes a circulating water station, an inlet pipeline, a condenser, and a return pipeline arranged in a circular manner. A circulating water pump, a circulating water outlet valve, and an inlet valve are sequentially installed on the inlet pipeline. A circulating water return valve is installed on the return pipeline. The liquid working fluid and the circulating water exchange temperatures in the condenser. The system is characterized by: at least one booster pump on the inlet pipeline; and a control mechanism for controlling the start-up, shutdown, and power of the booster pump. This control mechanism is integrated into the ORC condensate generator set control system and operated through the DCS interface of the ORC condensate generator set control system.

[0010] Preferably, the control mechanism includes a controller, a pressure sensor and a flow meter installed in the water inlet pipe, and the signals from the pressure sensor and the flow meter are transmitted to the controller in real time via a signal line. The start-up, shutdown and operating power of the booster pump are controlled by the water inlet pressure value received by the controller.

[0011] Preferably, the booster pump is also equipped with an overload protection device.

[0012] Preferably, a bypass pipeline is provided on the water inlet pipeline, the booster pump is installed on the bypass pipeline, and the two ends of the bypass pipeline are respectively located on the inlet pipe and the outlet pipe of the inlet valve.

[0013] Preferably, the bypass pipeline is provided with two control valves, which are respectively located on the inlet and outlet pipelines of the booster pump.

[0014] Preferably, the booster pump is a centrifugal booster pump with a flow rate range of 300-1250 m³ / h and a head range of 10-30 m.

[0015] Preferably, an arc-shaped joint is used at the junction between two adjacent pipes that make up the water inlet pipeline.

[0016] Preferably, the booster pump is further equipped with a temperature sensor and a vibration sensor. The temperature sensor and the vibration sensor are connected to the control mechanism via electrical signals. The temperature sensor is used to detect the temperature of the bearings and motor inside the booster pump, and the vibration sensor is used to detect the vibration amplitude of the booster pump.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] Adding at least one booster pump to the existing water inlet pipeline can effectively solve the problem that the pressure and flow rate of the condenser cannot meet the requirements when the condenser is cooled by the circulating water due to factors such as pipeline pressure loss and high potential energy. This results in unsatisfactory cooling effect of the condenser and affects the thermal efficiency of the generator set. The pump can ensure the cooling effect of the condenser and thus improve the overall operating efficiency of the generator set.

[0019] The control mechanism enables automatic start-up and shutdown, as well as flow regulation. It can adjust the operating status in real time according to the cooling needs of the condenser, thus improving the system's intelligence level; and it is simple and convenient to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram illustrating the control principle of this utility model through a control mechanism.

[0022] Figure 3 This is a diagram of existing technology;

[0023] In the diagram: 1. Circulating water outlet valve; 2. Circulating water pump; 3. Circulating water station; 4. Return pipeline; 5. Circulating water return valve; 6. Condenser; 7. Inlet pipeline; 8. Inlet valve; 9. Booster pump; 10. Bypass pipeline; 11. Control valve; 12. Flow meter; 13. Pressure sensor; 14. Controller; 15. Control mechanism; 16. Overload protection device; 17. Temperature sensor; 18. Vibration sensor. Detailed Implementation

[0024] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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, and therefore should not be construed as a limitation of this application.

[0026] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] like Figure 1 and Figure 2 As shown, a condenser circulating water supply pipeline booster system for a 280 ORC condensate generator set includes a circulating water station 3, an inlet pipeline 7, a condenser 6, and a return pipeline 4 arranged in a circulating manner. The inlet pipeline 7 is sequentially equipped with a circulating water pump 2, a circulating water outlet valve 1, and an inlet valve 8. The return pipeline 4 is equipped with a circulating water return valve 5. The liquid working fluid and the circulating water exchange temperatures in the condenser 6. The inlet pipeline 7 is equipped with at least one booster pump 9, and a control mechanism 15 is used to control the start-up, shutdown, and power of the booster pump 9. The control mechanism 15 is integrated into the ORC condensate generator set control system and is operated through the DCS interface of the ORC condensate generator set control system.

[0028] By adding at least one booster pump 9 to the existing inlet water pipeline 7, the problem of insufficient pressure and flow rate for condenser 6 to cool down due to factors such as pipeline pressure loss and high potential energy can be effectively solved, thus addressing the issue of unsatisfactory cooling effect of condenser 6 and affecting the thermal efficiency of the generator set. This ensures the cooling effect of condenser 6 and improves the overall operating efficiency of the generator set. Simultaneously, a control mechanism 15 is added to control the start-up, stop-start, and power output of booster pump 9. This control mechanism 15 is integrated into the ORC condensate generator set control system, enabling automatic start-up, stop-start, and flow regulation. It can adjust the operating status in real time according to the cooling requirements of condenser 6, improving the system's intelligence level. During operation, simply add a DCS interface to the ORC condensate generator set control system. After setting simple control logic in the DCS interface, the booster pump 9 can be controlled. For example, inputting in the DCS interface that the booster pump 9 will start synchronously when the ORC condensate generator set generates electricity and will be shut down synchronously after the generator set is finished, as well as setting the power level during startup, can complete the operation. The operation is simple and convenient.

[0029] A further improvement is that the control mechanism 15 includes a controller 14, a pressure sensor 13 and a flow meter 12 installed in the water inlet pipe. The signals from the pressure sensor 13 and the flow meter 12 are transmitted to the controller 14 in real time via a signal line. The start-up, shutdown and operating power of the booster pump 9 are controlled by the water inlet pressure value received by the controller 14.

[0030] The control mechanism 15 consists of a pressure sensor 13 and a flow meter 12 installed in the inlet pipe, and a controller 14 for receiving and processing the water flow signals detected in real time by the pressure sensor 13 and the flow meter 12. The pressure sensor 13 and the flow meter 12 are used to monitor the pressure and flow rate of the circulating water in real time. The controller 14 is installed in the ORC condensate generator control system and configured through an added DCS interface. According to the cooling requirements of the condenser 6, the control logic is designed as follows: when the inlet water pressure of the condenser 6 is lower than the set value, the booster pump 9 is automatically started; when the pressure reaches the set value, the booster pump 9 is automatically stopped or its operating frequency is reduced; when the flow rate is too low, the booster pump 9 is shut down, thereby achieving the purpose of water shortage protection. The entire circulating water transportation is monitored in real time by the pressure sensor 13 and the flow meter 12, realizing the automatic start and stop of the booster pump 9 and the flow regulation, while also adjusting the operating status in real time according to the cooling requirements of the condenser 6, thus improving the intelligence level of the system.

[0031] A further improvement is that the booster pump 9 is also equipped with an overload protection device 16.

[0032] When the motor current of booster pump 9 exceeds the rated value, booster pump 9 automatically cuts off the power supply due to overcurrent, causing it to stop running and simultaneously issuing an alarm signal. The overload protection device 16 ensures safer and more reliable operation: the addition of overload protection, water shortage protection, and other safety measures effectively prevents equipment failure and damage, extending the equipment's service life.

[0033] A further improvement is that a bypass pipeline 10 is provided on the water inlet pipeline 7, the booster pump 9 is installed on the bypass pipeline 10, and the two ends of the bypass pipeline 10 are respectively located on the inlet pipe and the outlet pipe of the inlet valve 8.

[0034] The bypass line 10 and the original inlet line 7 are connected in parallel, allowing for online modification without shutting down the system. After modification, by closing the inlet valve 8 and starting the booster pump 9, the circulating water can be directly pressurized by the booster pump 9 before entering the condenser 6, ensuring the water supply pressure. Moreover, since the two ends of the bypass line 10 are located on the inlet and outlet pipes of the inlet valve 8, the pressurization effect on the condenser 6 is better and the pressure loss is smaller. The pressurization operation can be achieved with just one booster pump 9.

[0035] A further improvement is made in that the bypass pipeline 10 is provided with two control valves 11, and the two control valves 11 are respectively located on the inlet and outlet pipelines of the booster pump 9.

[0036] During normal operation, if the generator set has low starting power, the circulating water in the inlet pipeline 7 can flow along the original pipeline by opening the inlet valve 8 and closing the two control valves 11, thereby reducing operating costs. When the booster pump 9 needs maintenance, it can also be maintained by closing the control valve 11 without affecting the flow of circulating water.

[0037] A further improvement is that the booster pump 9 is a centrifugal booster pump 9 with a flow rate range of 300-1250 m³ / h and a head range of 10-30 m.

[0038] The booster pump 9 is a centrifugal booster pump with a flow rate range of 300-1250 m³ / h, generally controlled at around 800 m³ / h, and a head range of 10-30 m, generally controlled at around 15 m in actual operation. The booster pump 9 should be installed as close as possible to the inlet of the condenser 6 to reduce pipeline pressure loss. By increasing the pressure of the booster pump 9, the pressure is generally increased to 0.3 MPa, thereby increasing the liquid flow rate. When the pump is turned on at its maximum, the pressure at the inlet of the condenser 6 can reach more than 0.45 MPa, and the rated flow rate can reach 1250 m³ / h, thus meeting the maximum circulating water consumption.

[0039] A further improvement is that an arc-shaped joint is used at the junction between two adjacent pipes that make up the water inlet pipeline 7.

[0040] Both the inlet pipe 7 and the return pipe 4 consist of multiple straight pipes. After assembly, these pipes inevitably have joints, currently primarily using right-angle joints. This results in high flow resistance and pressure loss within the pipes. Therefore, all existing right-angle joints have been replaced with curved joints. The optimized circulating water system, using large-radius elbows, reduces pipe resistance and pressure loss, lowers the energy consumption of the booster pump 9, improves its operating efficiency, and further reduces the overall energy consumption of the generator set, saving operating costs. The newly added pipes are all made of corrosion-resistant and high-pressure-resistant materials, such as stainless steel or carbon steel lined with plastic, ensuring long-term stable operation.

[0041] A further improvement is that the booster pump 9 is also equipped with a temperature sensor 17 and a vibration sensor 18. The temperature sensor 17 and the vibration sensor 18 are connected to the control mechanism 15 via electrical signals. The temperature sensor 17 is used to detect the temperature of the bearing and motor in the booster pump 9, and the vibration sensor 18 is used to detect the vibration amplitude of the booster pump 9.

[0042] The site temperature of the ORC condensate power generation system is consistently above 30°C, and the site is frequently accompanied by liquid hammer phenomena caused by abnormal condensate pipelines. These abnormal operating conditions have a significant impact on the operation of the centrifugal booster pump 9. Therefore, it is necessary to monitor the temperature and vibration data of the booster pump 9 in real time. Temperature sensor 17 and vibration sensor 18 are installed on the booster pump 9. Temperature sensor 17 detects the temperature of the bearings and motor inside the booster pump 9 in real time, while vibration sensor 18 detects the vibration amplitude of the booster pump 9 in real time. When the temperature or vibration amplitude is too high, the system can automatically shut down and issue an alarm signal in a timely manner, facilitating maintenance by operators.

[0043] After the entire system installation is complete, the following debugging steps need to be performed, including:

[0044] 1. Pressure test: Perform a pressure test on the circulating water pipeline to ensure that the pipeline and booster pump 9 are leak-free under rated pressure;

[0045] 2. Flow test: Measure the actual flow rate of the circulating water using flow meter 12 to ensure that it meets the design requirements;

[0046] III. Automatic Control Test: Simulate different operating conditions to test the automatic start / stop and flow regulation functions of booster pump 9, ensuring the stability and reliability of the control system. After the modification, the circulating water supply pressure of condenser 6 can be effectively increased, improving the cooling effect, reducing generator energy consumption, and ensuring safe and reliable system operation.

[0047] When starting the booster pump 9, the control mechanism 15 includes two starting modes: manual start and automatic stop. In manual start, select manual mode on the DCS interface of the controller 14, press the start button for the booster pump 9, and observe its operating status. In manual stop, select manual mode on the DCS interface of the controller 14, press the stop button for the booster pump 9, and turn it off. In automatic start, select automatic mode on the DCS interface of the controller 14. When the condenser 6 inlet water pressure is lower than the set value, the booster pump 9 will automatically start. In automatic stop, when the condenser 6 inlet water pressure reaches the set value, the booster pump 9 will automatically stop.

[0048] In automatic mode, after setting the relevant values, the system can automatically monitor the operating status. For example, the pressure value detected by the pressure sensor 13 can be displayed in real time through the DCS interface, thereby monitoring the inlet water pressure in the inlet pipeline 7 in real time. If the inlet water pressure is too high or too low, the operating frequency of the booster pump 9 can be adjusted through the control mechanism 15, or the opening of the pipeline valve can be manually adjusted. When the pressure value is less than the set value, the power of the booster pump 9 is started or increased to ensure that the pressure is within the set range. When the pressure value reaches the set value, the operating power of the booster pump 9 is maintained, reduced, or even shut down.

[0049] Based on the cooling requirements of condenser 6, the flow rate of circulating water in inlet pipe 7, monitored by flow meter 12, can be set and displayed in real time via the DCS interface. When the flow rate is too low, booster pump 9 is started to ensure stable flow, thereby avoiding damage caused by dry running due to water shortage. By adjusting the operating status of booster pump 9, it is ensured that the circulating water flow rate meets the cooling requirements.

[0050] The DCS interface can also display in real time the data collected by the temperature sensor 17 and vibration sensor 18 on the operating status of the booster pump 9, ensuring that the temperature and vibration amplitude do not exceed the set values.

[0051] When booster pump 9 malfunctions during operation:

[0052] For example, if the motor current of the booster pump 9 exceeds the rated value, the overload protection device 16 can send a signal to the control mechanism 15, and the control mechanism 15 can automatically stop the machine and issue an alarm signal through the system settings. At this time, the motor load should be checked, the fault should be eliminated, and the machine should be restarted.

[0053] For example, if the circulating water level is lower than the set value, the system will automatically stop and issue an alarm signal; at this time, it is necessary to check the water level in the circulating water tank, replenish the circulating water, and then restart.

[0054] For example, if the bearing temperature or vibration of booster pump 9 exceeds the set value, the system will automatically shut down and issue an alarm signal; at this time, it is necessary to contact the equipment maintenance personnel for repair, and restart booster pump 9 after the repair is completed.

[0055] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set, comprising a circulating water station (3), an inlet pipeline (7), a condenser (6), and a return pipeline (4) arranged in a circulating manner, wherein a circulating water pump (2), a circulating water outlet valve (1), and an inlet valve (8) are sequentially provided on the inlet pipeline (7), and a circulating water return valve (5) is provided on the return pipeline (4), wherein the liquid working fluid and the circulating water exchange temperatures in the condenser (6), characterized in that: At least one booster pump (9) is provided on the water inlet pipeline (7), and a control mechanism (15) is used to control the start and stop of the booster pump (9) and the power level. The control mechanism (15) is integrated into the ORC condensate generator control system and is operated through the DCS interface of the ORC condensate generator control system.

2. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set according to claim 1, characterized in that: The control mechanism (15) includes a controller (14), a pressure sensor (13) and a flow meter (12) installed in the water inlet pipe. The signals of the pressure sensor (13) and the flow meter (12) are transmitted to the controller (14) in real time through a signal line. The start-up, shutdown and operating power of the booster pump (9) are controlled by the water inlet pressure value received by the controller (14).

3. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set according to claim 1, characterized in that: The booster pump (9) is also equipped with an overload protection device (16).

4. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set according to claim 1, characterized in that: A bypass pipeline (10) is provided on the water inlet pipeline (7), and the booster pump (9) is installed on the bypass pipeline (10). The two ends of the bypass pipeline (10) are located on the inlet pipe and outlet pipe of the inlet valve (8), respectively.

5. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set according to claim 4, characterized in that: The bypass pipeline (10) is equipped with two control valves (11), which are respectively located on the inlet and outlet pipelines of the booster pump (9).

6. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set according to claim 1, characterized in that: The booster pump (9) is a centrifugal booster pump (9) with a flow rate range of 300-1250 m³ / h and a head range of 10-30 m.

7. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set according to claim 1, characterized in that: An arc-shaped joint is used at the junction between two adjacent pipes that make up the water inlet pipeline (7).

8. A pressurization system for the condenser circulating water supply pipeline of a 280 ORC condensate generator set according to claim 1, characterized in that: The booster pump (9) is also equipped with a temperature sensor (17) and a vibration sensor (18). The temperature sensor (17) and the vibration sensor (18) are connected to the control mechanism (15) via electrical signals. The temperature sensor (17) is used to detect the temperature of the bearing and motor in the booster pump (9), and the vibration sensor (18) is used to detect the vibration amplitude of the booster pump (9).

Images