阅读说明：本技术 一种600mw机组循环水节能优化运行提示方法 (Energy-saving optimized operation prompting method for circulating water of 600MW unit ) 是由 葛永海 宋培嘉 卓仁春 李素洁 李山鹤 文正勇 陈勇 于 2020-05-27 设计创作，主要内容包括：本发明公开了一种600MW机组循环水节能优化运行提示方法,本方法通过设计数据采集模型,对循环水温度、机组负荷、凝汽器真空度进行数据采集并建立数据样本库,将采集到的数据上传至数据样本库；对所述数据样本库中内容进行筛选、整理、存储,实时监测机组运行状态；将循环水优化运行技术措施通过提示逻辑进行判断,结合运行工况给出循环水优化运行方式,并对循环水泵状态及性能监测,能够及时提示运行人员调整,以解决现有循泵运行优化措施执行过程中不及时,造成机组能耗增加,循环切换不及时造成能源浪费问题。(The invention discloses a prompting method for energy-saving optimized operation of circulating water of a 600MW unit, which is characterized in that a data acquisition model is designed, data acquisition is carried out on the temperature of the circulating water, the load of the unit and the vacuum degree of a condenser, a data sample library is established, and the acquired data are uploaded to the data sample library; screening, sorting and storing the contents in the data sample library, and monitoring the running state of the unit in real time; the circulating water optimization operation technical measures are judged through prompt logics, a circulating water optimization operation mode is given by combining operation conditions, the state and the performance of a circulating water pump are monitored, and operation personnel can be prompted to adjust in time, so that the problems that the energy consumption of a unit is increased and the energy is wasted due to untimely circulation switching in the execution process of the existing circulating pump operation optimization measures are solved.)

1. A prompting method for energy-saving optimized operation of circulating water of a 600MW unit is characterized by comprising the following operation steps:

step S10, designing a data acquisition model, establishing a data sample base, and uploading acquired data to the data sample base;

screening, sorting and storing the contents in the data sample library, and monitoring the running state of the unit in real time;

step S20, carrying out prompting logic design of circulating water energy-saving optimized operation, and setting different prompting conditions of optimized operation modes for four circulating water pumps of two units;

step S30, judging and prompting the current optimal operation mode of the unit by prompting logic and the operation influence factors of the circulating water pump, wherein the influence factors comprise circulating water temperature, unit load and condenser vacuum degree;

and step S40, prompting the optimized operation mode of the circulating water pump under different conditions in the step S30, and monitoring and prompting the current operation state of the circulating water pump in real time.

2. The prompting method for energy-saving optimized operation of circulating water of a 600MW unit according to claim 1, wherein the data acquisition model in the step S10 is used for acquiring data related to circulating water temperature, unit load and condenser vacuum degree under different operation conditions and uploading the acquired information to a sample library.

3. The method for prompting energy-saving optimized operation of circulating water of a 600MW unit according to claim 1, wherein the prompting logic design in the step S20 comprises:

step S201, the prompting logic comprises two units and four circulating water pumps, and the circulating water pumps are divided into high-speed pumps and low-speed pumps;

step S202, respectively setting operating environments for a low-speed pump and a high-speed pump according to the collected circulating water temperature, the unit load and the condenser vacuum degree;

and step S203, establishing free working connection among the two high-speed pumps and the four low-speed pumps, and freely combining different circulating water pumps to complete the circulating water optimized operation process according to different working conditions.

4. The energy-saving optimized operation prompting method for circulating water of a 600MW unit according to claim 3, wherein the optimized operation prompting method for the unit operated in the step S30 comprises the following steps:

the single-machine operation is that only one unit operates, and two circulating water pumps are configured to operate at high speed or low speed;

and the double-machine operation is that two machine sets operate simultaneously, and each machine set is provided with two circulating water pumps to operate in different or same states.

5. The energy-saving optimized operation prompting method for circulating water of the 600MW unit according to claim 4, characterized in that the optimized operation mode of the circulating water pump is prompted by utilizing circulating water temperature, unit load and condenser vacuum degree, and when the circulating water temperature is less than 15 ℃, the operation of a single low-speed pump of the current unit is prompted.

6. The energy-saving optimized operation prompting method for circulating water of the 600MW unit according to claim 4, characterized in that the optimized operation mode of the circulating water pump is prompted by using circulating water temperature, unit load and condenser vacuum degree, and when the circulating water temperature is between 15-20 ℃, the optimized operation mode of the circulating water pump and the unit is prompted by unit load height:

when the load of the unit is lower than 500MW, prompting the current unit to enter a single-unit running state, and configuring a low-speed pump for the unit to run;

when the unit load is higher than 500MW, the current unit is prompted to enter a single-unit operation state, and a high-speed pump is configured for the unit to operate.

7. The energy-saving optimized operation prompting method for circulating water of the 600MW unit according to claim 4, characterized in that the optimized operation mode of the circulating water pump is prompted by using circulating water temperature, unit load and condenser vacuum degree, and when the circulating water temperature is between 20-25 ℃, the optimized operation mode of the circulating water pump and the unit is prompted by unit load height:

when the load of the unit is lower than 500MW, prompting the current unit to enter a single-unit running state, and configuring a high-speed pump for the unit to run;

when the load of the unit is higher than 500MW, prompting the current unit to enter a single-unit operation state, and configuring two high-speed pumps for the unit to operate;

when the double-machine running state is realized and the loads of the two machines are higher than 500MW, the opening of a machine set circulating water outlet main pipe contact door is prompted, and three low-speed pumps are configured for the machine set to run.

8. The method for prompting energy-saving optimized operation of the circulating water of the 600MW unit according to claim 7, wherein the circulating water connection door of the unit is a device connected between two units, two valves are arranged, when the unit adopts multi-unit operation, the method prompts to open the circulating water connection door, simultaneously and parallelly operate a plurality of circulating water pumps in a plurality of units, and when the circulating water pumps are stopped, the method prompts to close the standby valves first and then stop the operation of the circulating water pumps.

9. The energy-saving optimized operation prompting method for circulating water of the 600MW unit according to claim 4, characterized in that the optimized operation mode of the circulating water pump is prompted by utilizing circulating water temperature, unit load and condenser vacuum degree, and when the circulating water temperature is between 25 and 30 ℃, the optimized operation mode of the circulating water pump and the unit is prompted by unit load height and the condenser vacuum degree:

when the loads of the multiple units are higher than 500MW, prompting to select a multi-unit operation mode, opening a circulating water communication door of the units, and configuring the two units into two high-speed circulating pumps and one low-speed circulating water pump to operate;

when the load of one unit in the multiple units is lower than 500MW, the loads of other units are higher than 500MW, and the vacuum degree of a condenser is higher than 2kPa, prompting to select a multi-unit operation mode, opening a circulating water connection door of the units, and configuring two units into three high-speed circulating water pumps to operate;

when the load of one unit in the multiple units is lower than 500MW, the loads of other units are higher than 500MW, and the vacuum degree of the condenser is lower than 2kPa, a double-unit operation mode is prompted to be selected, circulating water communication doors of the two units are opened, and the two units are configured into two high-low speed pumps and one high-speed circulating water pump to operate.

10. The energy-saving optimized operation prompting method for circulating water of a 600MW unit according to claim 1, wherein the step S40 of monitoring the operation state comprises:

monitoring the unit operation state from three aspects of response time, energy saving amount and current unit operation mode;

the response time is the time for the unit to sense the change of the circulating water pump when the operation parameters of the unit change;

the energy saving amount is the difference between the current energy consumption and the historical energy consumption of the unit under the same condition after the unit optimizes and adjusts the running state of the circulating water pump;

and the current unit operation mode is the actual operation mode of the current unit in the working process.

Technical Field

The invention relates to the field of power production, in particular to a prompting method for energy-saving optimized operation of circulating water of a 600MW unit.

Background

In the actual production process of power plant, the circulating water power consumption is the second main auxiliary engine except that the draught fan, and most power plants are all the circulating water optimal operation technical measure of leaving a station, through the artificial judgement whether should switch high, low-speed circulation pump or increase and start the circulation pump operation, can not in time according to load, circulation temperature, condenser vacuum change circulation pump operation mode and arrive nearest operating mode operation, and the adjustment is untimely can cause certain wasting of resources, and current circulating water optimal operation technique has following problem:

1. through artificial judgment, the service level and the response time are not timely;

2. once the circulating water quantity is insufficient, the vacuum degree of the condenser is reduced, the circulating pump is not started in time or switched to a high-speed pump to run, so that the running economy of the unit is reduced, and certain potential safety hazards exist when the circulating water quantity is too low;

3. when the vacuum degree of the condenser is larger than the optimal vacuum, the circulating water pump is not stopped or switched to a low-speed pump to operate in time, and unnecessary energy waste is caused.

Therefore, a prompting method for energy-saving and optimized operation of circulating water of a 600MW unit is needed to solve the problems.

Disclosure of Invention

The invention aims to provide a prompting method for energy-saving and optimized operation of circulating water of a 600MW unit, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the method for prompting the energy-saving optimized operation of the circulating water of the 600MW unit comprises the following operation steps:

step S10, designing a data acquisition model, establishing a data sample base, and uploading acquired data to the data sample base;

screening, sorting and storing the contents in the data sample library, and monitoring the running state of the unit in real time;

step S20, carrying out prompting logic design of circulating water energy-saving optimized operation, and setting different prompting conditions of optimized operation modes for four circulating water pumps of two units;

step S30, judging and prompting the current optimal operation mode of the unit by prompting logic and the operation influence factors of the circulating water pump, wherein the influence factors comprise circulating water temperature, unit load and condenser vacuum degree;

and step S40, prompting the optimized operation mode of the circulating water pump under different conditions in the step S30, and monitoring and prompting the current operation state of the circulating water pump in real time.

Further, the data acquisition model in step S10 is used to acquire data related to circulating water temperature, unit load, and condenser vacuum degree at different time states, and upload the acquired information to the sample library.

The arrangement of the data acquisition model ensures the operating environment condition of the circulating water pump, can sense and respond in time when the condition changes, improves the accuracy of judging the operating condition of the circulating water pump, and makes an optimized operating mode conversion prompt in the shortest time for the change of influencing factors.

Further, the prompting of the logic design in step S20 includes:

step S201, the prompting logic comprises two units and four circulating water pumps, and the circulating water pumps are divided into high-speed pumps and low-speed pumps;

step S202, respectively setting operating environments for a low-speed pump and a high-speed pump according to the collected circulating water temperature, the unit load and the condenser vacuum degree;

and S203, establishing free working connection between the four high-speed pumps and the four low-speed pumps, and freely combining different circulating water pumps according to different working conditions to complete the circulating water optimized operation process.

Further, the operation of the unit optimization operation mode in step S30 includes:

the single-machine operation is that only one unit operates, and two circulating water pumps are configured to operate at high speed or low speed;

the double-machine operation is that two machine sets operate simultaneously, and each machine set is provided with two circulating water pumps to operate in different or same states.

Prompting the optimization operation mode of the circulating water pump by utilizing circulating water temperature, unit load and condenser vacuum degree, and prompting the current unit to operate in a single low-speed circulating pump mode when the circulating water temperature is less than 15 ℃;

the method comprises the following steps of prompting the circulating water pump to optimize the running mode by utilizing circulating water temperature, unit load and condenser vacuum degree, and prompting the circulating water pump to optimize the running mode by unit load height when the circulating water temperature is between 15 and 20 ℃:

when the load of the unit is lower than 500MW, prompting the current unit to enter a single-unit running state, and configuring a low-speed pump for the unit to run;

when the load of the unit is higher than 500MW, prompting the current unit to enter a single-unit operation state, and configuring a high-speed pump for the unit to operate;

the method comprises the following steps of prompting a circulating water pump to optimize the running mode by utilizing circulating water temperature, unit load and condenser vacuum degree, and prompting the circulating water pump and the unit to optimize the running mode by unit load height when the circulating water temperature is between 20 and 25 ℃:

when the load of the unit is lower than 500MW, prompting the current unit to enter a single-unit running state, and configuring a high-speed pump for the unit to run;

when the load of the unit is higher than 500MW, prompting the current unit to enter a single-unit operation state, and configuring two high-speed pumps for the unit to operate;

when the unit is in a double-unit operation state and the loads of the two units are both higher than 500MW, prompting to open a circulating water communication door of the unit and configuring three circulating pumps for the unit to operate;

the unit circulating water interconnection door is equipment connected between two units, is provided with two valves, usually only opens one side valve, and the other side valve is closed for standby, and when the two units operate, the circulating water interconnection door is prompted to open, and circulating water pumps in the two units operate in parallel at the same time.

The method comprises the following steps of prompting the circulating water pump to optimize the operation mode by utilizing circulating water temperature, unit load and condenser vacuum degree, and prompting the circulating water pump to optimize the operation mode by the unit load height and the condenser vacuum degree when the circulating water temperature is between 25 and 30 ℃:

when the loads of the two units are higher than 500MW, the opening of a communication door of a circulating water main pipe is prompted, and the two units are configured into three high-speed circulating water pumps to operate.

When the vacuum degree of the condenser is reduced, the running economy of the unit is ensured by increasing the circulating water pump or switching to a high-speed pump running state; when the vacuum degree of the single-circulation water quantity excess condenser exceeds the optimal vacuum, the high-speed circulating water pump is prompted to be switched to a low-speed pump or stop running, energy waste is avoided to a certain extent, and the service life of the circulating water pump is prolonged.

The step S40 of monitoring the operation state includes:

monitoring the unit operation state from three aspects of response time, energy saving amount and current unit operation mode;

the response time is the time for the unit to sense the change of the circulating water pump when the operation parameters of the unit change;

the energy saving amount is the difference between the current energy consumption and the historical energy consumption of the unit under the same condition after the unit optimizes and adjusts the running state of the circulating water pump;

and the current unit operation mode is the actual operation mode of the current unit in the working process.

Compared with the prior art, the invention has the beneficial effects that:

1. monitoring influence factors of the circulating water pumps of the unit, judging the current optimized operation mode of the unit according to the influence factors of the circulating water pumps, and improving the switching and adjusting speed of the operation state among the circulating water pumps;

2. when the unit operation parameters change, the operation state of the circulating water pump is timely adjusted according to the optimized operation mode prompt, the maximum utilization of energy is realized, the service life of the circulating water pump is prolonged while the energy is saved, and potential safety hazards are eliminated.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is an operation flow chart of a prompting method for energy-saving optimized operation of circulating water of a 600MW unit;

FIG. 2 is a schematic diagram of a circulating water communication door of a 600MW unit circulating water energy-saving optimized operation prompting method of the invention;

fig. 3 is a calculation and judgment process diagram of step S30 of the prompting method for energy-saving optimized operation of circulating water of a 600MW unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, in an embodiment of the present invention, a prompting method for energy-saving and optimized operation of circulating water of a 600MW unit includes the following operation steps:

step S10, designing a data acquisition model, establishing a data sample base, and uploading acquired data to the data sample base;

screening, sorting and storing the contents in the data sample library, and monitoring the running state of the unit in real time;

step S20, carrying out prompting logic design of circulating water energy-saving optimized operation, and setting different prompting conditions of optimized operation modes for four circulating water pumps of two units;

step S30, judging and prompting the current optimal operation mode of the unit by prompting logic and the operation influence factors of the circulating water pump, wherein the influence factors comprise circulating water temperature, unit load and condenser vacuum degree;

and step S40, prompting the optimized operation mode of the circulating water pump under different conditions in the step S30, and monitoring and prompting the current operation state of the circulating water pump in real time.

11. Further, the data acquisition model in step S10 is used to acquire data related to circulating water temperature, unit load, and condenser vacuum degree at different time states, and upload the acquired information to the sample library.

Further, the prompting of the logic design in step S20 includes:

step S201, the prompting logic comprises two units and four circulating water pumps, and the circulating water pumps are divided into high-speed pumps and low-speed pumps;

step S202, respectively setting operating environments for a low-speed pump and a high-speed pump according to the collected circulating water temperature, the unit load and the condenser vacuum degree;

and S203, establishing free working connection among the high-speed pumps and the low-speed pumps, and freely combining different circulating water pumps according to different working conditions to complete the circulating water optimized operation process.

Further, the prompting of the running unit optimization running mode in step S30 includes:

the single-machine operation is that only one unit operates, and two circulating water pumps are configured to operate at high speed or low speed;

and the two units run simultaneously, and each unit is provided with two circulating water pumps to run in different or same states.

Prompting the optimal operation mode of the circulating water pump by utilizing circulating water temperature, unit load and condenser vacuum degree, and prompting the unit single-machine low-speed pump to operate when the circulating water temperature is less than 15 ℃;

the running mode of the circulating water pump is prompted by utilizing the circulating water temperature, the unit load and the condenser vacuum degree, and when the circulating water temperature is between 15 and 20 ℃, the running mode of the circulating water pump is optimized by prompting the unit load height:

when the load of the unit is lower than 500MW, prompting the current unit to enter a single-unit running state, and configuring a low-speed pump for the unit to run;

when the load of the unit is higher than 500MW, prompting the current unit to enter a single-unit operation state and prompting the unit to configure a high-speed pump to operate;

the method comprises the following steps of prompting the circulating water pump to optimize the running mode by utilizing circulating water temperature, unit load and condenser vacuum degree, and prompting the circulating water pump to optimize the running mode by unit load height when the circulating water temperature is between 20 and 25 ℃:

when the load of the unit is lower than 500MW, prompting the current unit to enter a single-unit running state, and configuring a high-speed pump for the unit to run;

when the load of the unit is higher than 500MW, prompting the current unit to enter a single-unit operation state, and configuring two high-speed pumps for the unit to operate;

when the unit is in a double-unit operation state and the loads of the double units are all higher than 500MW, prompting to start circulating water communication doors of the two units and configuring three high-speed pumps for the unit to operate;

the unit circulating water connection door is equipment connected between two units, is provided with two valves, usually only opens one side valve, closes the other side valve for standby, and prompts to open the circulating water connection door when the two units operate so as to enable a plurality of circulating water pumps in a plurality of units to operate in parallel;

the method comprises the following steps of prompting the circulating water pump to optimize the operation mode by utilizing circulating water temperature, unit load and condenser vacuum degree, and prompting the circulating water pump to optimize the operation mode by the unit load height and the condenser vacuum degree when the circulating water temperature is between 25 and 30 ℃:

when the loads of the two units are higher than 500MW, prompting to open a circulating water communication door of the units, and configuring the two units into two high-speed circulating pumps and one low-speed circulating water pump to operate;

further, the step S40 of monitoring the operation state includes:

monitoring the unit operation state from three aspects of response time, energy saving amount and current unit operation mode;

the response time is the time for the unit to sense the change of the circulating water pump when the unit operating parameters change;

the energy saving amount is the difference between the current energy consumption and the historical energy consumption of the unit under the same condition after the unit optimizes and adjusts the running state of the circulating water pump;

and the current unit operation mode is the actual operation mode of the current unit in the working process.