Cold-end circulating water adjusting system

Abstract

The utility model relates to the technical field of circulating cooling water control, and discloses a cold-end circulating water adjusting system which comprises a circulating water pump for pumping circulating water, the circulating water is pumped from a circulating water pool and then fed into a condenser through a water inlet pipeline, and the circulating water returns to a cooling tower from a water outlet pipeline of the condenser to be cooled and then enters the circulating water pool. A flow sensor and an inlet temperature sensor are arranged in the water inlet pipeline, and an outlet temperature sensor is arranged in the water outlet pipeline. The system can automatically calculate the optimal circulating water quantity and temperature control strategy according to data monitored in real time. A built-in algorithm of the system can predict the running trend of the equipment, and adjustment is made in advance according to the running trend so as to prevent equipment faults caused by abnormal temperature. Through the mode, the system not only improves the energy utilization efficiency, but also prolongs the service life of equipment, and reduces the maintenance cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to circulating cooling water control technical field, concretely relates to a cold end circulating water regulating system. BACKGROUND

[0002] A cooling tower is a special device that provides temperature regulation for industrial equipment, power plants, air conditioning systems, and other facilities. Its working principle is based on the expansion of the water-air contact area, and the water temperature is reduced through the heat exchange process between water and air. Circulating cooling water, which is continuously circulating in the cooling tower system, relies on the internal pipes and pumps of the system for its circulation process. During the circulation process of the cooling tower, the circulating cooling water effectively removes heat through heat exchange with the outside air, thereby reducing its temperature. Subsequently, the cooling tower sends these cooled water back into the system for recycling, ensuring a continuous and effective cooling effect.

[0003] In the circulating pipeline system, the configuration of circulating water quantity directly affects the outlet water temperature of the cooling tower, the system water consumption, and the cooling efficiency. Improper configuration of circulating water quantity may lead to a decrease in the cold end efficiency of key equipment such as the generator set of a thermal power plant, and in extreme cases, it may even negatively affect the efficiency of the generator set of the thermal power plant. Therefore, accurate regulation of circulating water quantity plays an extremely important role in the operating efficiency and economic benefits of the power plant. SUMMARY

[0004] The utility model intends to provide a cold end circulating water regulating system to solve the problem of not being able to adjust the circulating water quantity in a timely manner when the working conditions change.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cold end circulating water regulating system, comprising a circulating water pump for extracting circulating water, the circulating water is sent into a condenser through a water inlet pipeline after being extracted from a circulating water pool, the circulating water enters the circulating water pool after being cooled in the cooling tower through the water outlet pipeline of the condenser, a flow sensor and an inlet temperature sensor are arranged in the water inlet pipeline, and an outlet temperature sensor is arranged in the water outlet pipeline.

[0006] Preferably, as an improvement, the inlet temperature sensor is located at the inlet of the condenser, and the outlet temperature sensor is located at the outlet of the condenser.

[0007] Preferably, as an improvement, the circulating water pump adjusts the flow rate through a variable frequency motor. The use of a variable frequency motor allows dynamic adjustment of the speed and flow rate of the circulating water pump according to actual needs, thereby avoiding unnecessary energy consumption. This not only improves the energy efficiency of the system, but also reduces the wear and tear of the water pump, prolonging its service life.

[0008] Preferably, as an improvement, the circulating water pump is designed with four parallel-connected water pumps, and the number of water pumps turned on corresponds to the circulating water demand. The parallel connection of the water pumps provides flexible adjustment of system flow. According to the circulating water demand, the appropriate number of water pumps can be turned on or off, ensuring that the system meets the flow demand without excessive energy consumption.

[0009] Preferably, as an improvement, a redundant pipeline is provided in the circulating water pool, which is connected in parallel with the water inlet pipeline, and a standby pump is arranged on the redundant pipeline. The existence of the redundant pipeline and the standby pump greatly improves the reliability and safety of the system. In the event of a failure in the main water inlet pipeline or the main pump, the system can quickly switch to the redundant pipeline and start the standby pump, ensuring continuous supply of circulating water and avoiding production interruption.

[0010] Preferably, as an improvement, the flow of the circulating water pump is adjusted according to the temperature difference between the inlet temperature sensor and the outlet temperature sensor. This control strategy can respond to changes in the heat exchange efficiency of the condenser in real time and optimize the heat exchange process by adjusting the flow. When the temperature difference increases, it indicates that the heat exchange efficiency decreases, and the flow can be increased to improve the heat exchange efficiency. Conversely, when the temperature difference decreases, the flow can be appropriately reduced to save energy.

[0011] Preferably, as an improvement, the number of water pumps turned on is adjusted according to the temperature difference between the inlet temperature sensor and the outlet temperature sensor. By dynamically adjusting the number of water pumps turned on according to the temperature difference, the system can operate at the optimal flow under different operating conditions, thereby avoiding energy waste and excessive wear of equipment.

[0012] Preferably, as an improvement, the opening and closing of the standby pump on the redundant pipeline are adjusted according to the temperature difference between the inlet temperature sensor and the outlet temperature sensor.

[0013] The principle and advantages of the present scheme are as follows: In actual application, the present scheme monitors the circulating water quantity of the pipeline in real time through the flow sensor; adjusts the circulating water quantity in a timely manner through the data of the flow sensor and the temperature sensor, ensures the cold end efficiency of the generator set and other equipment, adjusts the operating efficiency of the cooling tower in a timely manner, adjusts the temperature of the circulating water in a timely manner, and saves resources; when the circulating water quantity is small, only a small number of water pumps can be turned on or the flow can be adjusted through a variable frequency motor, and the circulating water quantity can be quickly adjusted.

[0014] In addition, the present scheme also includes an intelligent control system that can automatically calculate the optimal circulating water quantity and temperature control strategy based on real-time monitoring data. The built-in algorithm of the system can predict the operating trend of the equipment and make adjustments in advance to prevent equipment failure caused by temperature abnormalities. In this way, the system not only improves energy utilization efficiency but also prolongs the service life of the equipment and reduces maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure of the embodiment of the present application is shown in the schematic diagram. DETAILED DESCRIPTION

[0016] The following will be further described in detail through specific embodiments:

[0017] The reference signs in the drawings of the specification include: circulating water pump controller 1, circulating water pump motor 2, circulating water pump 3, water inlet pipeline 4, flow sensor 5, inlet temperature sensor 6, condenser 7, outlet temperature sensor 8, water outlet pipeline 9.

[0018] The embodiment is basically as shown in the accompanying drawings Figure 1 : The circulating water pump 3 draws the cooled circulating water from the circulating water pool, sends it into the condenser 7 through the water inlet pipeline 4 to circulate heat absorption, makes the hot steam in the condenser condense into water, and then returns to the cooling tower through the water outlet pipeline 9 after cooling to enter the circulating water pool. In the running process, the flow sensor 5, the inlet temperature sensor 6 and the outlet temperature sensor 8 simultaneously measure the temperature and feed back to the circulating water pump controller 1, which is uploaded to the cloud for simulation calculation, and the circulating water pump motor 2 is regulated according to the calculation result, so as to reduce or increase the circulating water volume, and then ensure the accuracy of the control according to the data uploaded by the flow sensor 5. The present scheme monitors the temperature at multiple places in real time through the temperature sensor 6 and the temperature sensor 8, so as to judge whether the circulating water volume is too large or too small at the moment, and thus to regulate the circulating water pump in real time, and at the same time, the flow feedback of the flow sensor 5 is used to ensure the accuracy of the control.

[0019] The inlet temperature sensor 6 and the outlet temperature sensor 8 are used to monitor the inlet and outlet temperatures of the circulating water in real time, calculate the temperature difference, and evaluate the cooling effect. According to the temperature difference data, the fan speed and the spraying amount of the cooling tower and other parameters are adjusted to ensure that the circulating water is fully cooled. When the outlet temperature is too high, the circulating water volume is automatically increased or the operation efficiency of the cooling tower is improved; when the outlet temperature is too low, the circulating water volume is correspondingly reduced or the operation efficiency of the cooling tower is reduced, so as to avoid excessive cooling and energy waste.

[0020] For example, the circulating water pump 3 is equipped with a frequency converter to realize variable frequency speed regulation operation of the water pump. According to the system demand, the water pump speed is adjusted in real time to reduce energy consumption. The flow sensor 5 is used to monitor the circulating water flow in real time, and the circulating water pump 3 speed or start-stop state is adjusted according to the cooling demand of the generator set to ensure that the circulating water flow matches the cooling demand. The PID (proportional-integral-derivative) control algorithm is introduced, the running parameters of the circulating water pump are automatically adjusted according to the data of the flow sensor and the temperature sensor, and the precise control of the flow is realized.

[0021] Further, by utilizing the big data processing capabilities and machine learning algorithms of the cloud computing platform, historical data can be deeply analyzed to construct a predictive model for the circulating water system. Based on this model, future cooling demands over a certain period of time can be predicted in advance, and the number of operating circulating water pumps or their rotational speeds can be intelligently adjusted to achieve forward-looking energy management. By continuously monitoring the operating status and parameters of key equipment such as circulating water pumps, cooling towers, and sensors, a fault warning model can be established. Once abnormal data or trends are detected, an early warning mechanism will be immediately activated. Regular energy efficiency assessments of the circulating water system can be conducted to analyze the energy consumption of each part of the system and identify energy efficiency bottlenecks and potential areas for improvement. Based on the assessment results, specific optimization measures can be developed, such as replacing high-efficiency energy-saving equipment, optimizing system layout, adjusting operating strategies, etc., to continuously improve the energy efficiency performance of the system.

[0022] The above is only an embodiment of the present application, and common technical solutions and / or characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, and in the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The protection scope claimed in the present application should be subject to the content of the claims, and the specific embodiments and the like in the specification can be used to explain the content of the claims.

Claims

1. A cold-end circulating water regulating system, comprising a circulating water pump for drawing circulating water, wherein the circulating water is drawn from a circulating water tank and sent to a condenser through an inlet pipe, and the circulating water returns to the cooling tower from the condenser's outlet pipe for cooling before entering the circulating water tank, characterized in that, The inlet pipe is equipped with a flow sensor and an inlet temperature sensor, and the outlet pipe is equipped with an outlet temperature sensor; the circulating water pump adjusts the flow rate through a variable frequency motor.

2. The cold-end circulating water regulating system according to claim 1, characterized in that: The inlet temperature sensor is located at the inlet of the condenser, and the outlet temperature sensor is located at the outlet of the condenser.

3. The cold-end circulating water regulating system according to claim 1, characterized in that: The circulating water pump consists of four pumps connected in parallel, with the number of pumps activated corresponding to the circulating water demand.

4. The cold-end circulating water regulating system according to claim 1, characterized in that: The circulating water tank is also equipped with a redundant pipeline, which is connected in parallel with the inlet pipeline, and a standby pump is installed on the redundant pipeline.

5. The cold-end circulating water regulating system according to claim 1, characterized in that: The flow rate of the circulating water pump is adjusted by a variable frequency motor based on the temperature difference between the inlet and outlet temperature sensors.

6. The cold-end circulating water regulating system according to claim 4, characterized in that: Adjust the number of water pumps turned on based on the temperature difference between the inlet and outlet temperature sensors.

7. The cold-end circulating water regulating system according to claim 4, characterized in that: Adjust the opening and closing of the standby pump on the redundant pipeline based on the temperature difference between the inlet and outlet temperature sensors.

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