阅读说明：本技术 一种汽机锅炉除氧给水监控系统 (Steam turbine boiler deoxidization water supply monitored control system ) 是由 钟闵吉 张旭 任洪 杨勇 于 2021-08-27 设计创作，主要内容包括：本发明公开了火力发电技术领域的一种汽机锅炉除氧给水监控系统,包括：处理模块,用于执行对数据进行处理并且对各模块以及设备进行控制；存储模块,所述存储模块连接至所述处理模块,用于执行对处理模块处理后的数据进行存储并且亦能够通过处理模块对存储模块内的数据进行调取；显示模块,所述显示模块连接至处理模块,用于执行对处理模块输入指令以及显示存储模块内存储的数据,本发明能够对历史记录进行调取,并将现在的数据与历史数据进行对比,用于对设备的异常进行预测,能够预测设备的异常进行预测,能够对其进行及时的维护,保障了设备的使用寿命。(The invention discloses a steam turbine boiler deoxidization water supply monitoring system in the technical field of thermal power generation, which comprises: the processing module is used for processing data and controlling each module and equipment; the storage module is connected to the processing module and used for storing the data processed by the processing module and calling the data in the storage module through the processing module; the display module is connected to the processing module and used for executing the instructions input by the processing module and displaying the data stored in the storage module.)

1. The utility model provides a steam turbine boiler deoxidization feedwater monitored control system which characterized in that: the method comprises the following steps:

a processing module (100) for performing processing on data and controlling each module and equipment;

the detection module (200) is connected to the processing module (100) and is used for detecting the liquid level, the pressure, the temperature and the oxygen content of the boiler deoxygenating and water-feeding equipment and transmitting the detection data to the processing module (100);

the signal output module (300) is connected to the processing module (100) and is used for transmitting the data processed by the processing module (100) to a personal device or a control center in a wireless or wired communication manner, and the personal device or the control center can call the data in the processing module (100) through the signal output module (300);

the storage module (400) is connected to the processing module (100), and is used for storing the data processed by the processing module (100) and also calling the data in the storage module (400) through the processing module (100);

the display module (500) is connected to the processing module (100) and used for inputting instructions to the processing module (100) and displaying data stored in the storage module (400).

2. The steam turbine boiler deoxygenation and water feeding monitoring system of claim 1, characterized in that: the processing module (100) is a Siemens S7-200smart programmable controller.

3. The steam turbine boiler deoxygenation and water feeding monitoring system of claim 1, characterized in that: the detection module (200) is a liquid level sensor, a pressure sensor, a temperature sensor and an oxygen content sensor.

4. The steam turbine boiler deoxygenation and water feeding monitoring system of claim 1, characterized in that: the signal output module (300) is a wired signal output module and a wireless signal output module.

5. The steam turbine boiler deoxygenation and water feeding monitoring system of claim 4, characterized in that: the wired signal output module is an RS485 communication interface, and the wireless signal output module is a WiFi module, a 4G module or a 5G module.

6. The steam turbine boiler deoxygenation and water feeding monitoring system of claim 1, characterized in that: the display module (500) is a touchable display screen.

7. The steam turbine boiler deoxygenation and water feeding monitoring system of claim 1, characterized in that: the processing module (100) is also provided with a circulating system.

8. The steam turbine boiler deoxygenation and feedwater monitoring system of any of claims 1 and 8, wherein: the circulation system includes:

the circulating pump (600), the circulating pump (600) is connected to the processing module (100) and the deaerator, and is used for pumping out deaerated water which is unqualified in deaerating;

the secondary deaerator (700) is connected to the circulating pump (600) and is used for storing deaerated water pumped out by the circulating pump (600) and deaerating the deaerated water secondarily;

and the water pump (800) is connected to the secondary deaerator (700) and is used for pumping deaerated water qualified in deaerating out of the secondary deaerator (700) into the boiler.

Technical Field

The invention relates to the technical field of thermal power generation, in particular to a steam turbine boiler deoxygenation and water supply monitoring system.

Background

Thermal power generation is a power generation mode which utilizes heat energy generated by combustible materials during combustion and converts the heat energy into electric energy through a power generation power device. China is rich in coal resources, 10.9 hundred million tons of coal are produced in 1990, and the coal for power generation only accounts for 12 percent. Thermal power generation still has huge potential.

In the process of boiler feed water treatment, oxygen removal is a very critical link. Oxygen is a main corrosive substance of a boiler water supply system, oxygen in the water supply system is required to be rapidly removed, otherwise, the oxygen can corrode the water supply system and parts of the boiler, iron oxide which is a corrosive substance can enter the boiler and deposit or attach on the wall and the heated surface of the boiler to form indissolvable and badly heat-conducting iron scale, and the corroded iron scale can cause pitting on the inner wall of a pipeline and increase the resistance coefficient. When the pipeline is seriously corroded, even pipeline explosion accidents can happen. The national regulation states that a steam boiler with the evaporation capacity of more than or equal to 2 tons per hour and a hot water boiler with the water temperature of more than or equal to 95 ℃ are required to remove oxygen.

The deaerator in the existing thermal power plant can only be overhauled after the deaerator breaks down, so that the service life of the deaerator is seriously influenced.

Disclosure of Invention

The invention aims to provide a monitoring system for deaerating and water feeding of a steam turbine boiler, which aims to solve the problem that the deaerator in the existing thermal power plant in the background art can be overhauled only after the deaerator fails, so that the service life of the deaerator is seriously influenced.

In order to achieve the purpose, the invention provides the following technical scheme: a steam turbine boiler deoxygenation feedwater monitoring system comprising:

the processing module is used for processing data and controlling each module and equipment;

the detection module is connected to the processing module and is used for detecting the liquid level, the pressure, the temperature and the oxygen content of the boiler deoxygenation water supply equipment and transmitting detection data to the processing module;

the signal output module is connected to the processing module and used for transmitting the data processed by the processing module into the personal equipment or the control center in a wireless or wired communication mode, and the personal equipment or the control center can call the data in the processing module through the signal output module;

the storage module is connected to the processing module and used for storing the data processed by the processing module and calling the data in the storage module through the processing module;

and the display module is connected to the processing module and used for executing the instruction input to the processing module and displaying the data stored in the storage module.

Preferably, the processing module is a Siemens S7-200smart programmable controller.

Preferably, the detection module is a liquid level sensor, a pressure sensor, a temperature sensor and an oxygen content sensor.

Preferably, the signal output module is a wired signal output module and a wireless signal output module.

Preferably, the wired signal output module is an RS485 communication interface, and the wireless signal output module is a WiFi module, a 4G module or a 5G module.

Preferably, the display module is a touchable display screen.

Preferably, a circulating system is further arranged on the processing module.

Preferably, the circulation system comprises:

the circulating pump is connected to the processing module and the deaerator and is used for pumping out deaerated water which is unqualified in deaerating;

the secondary deaerator is connected to the circulating pump and used for storing deaerated water pumped out by the circulating pump and deaerating the deaerated water secondarily;

and the water pump is connected to the secondary deaerator and is used for pumping the deaerated water qualified for deaerating out of the secondary deaerator into the boiler.

Compared with the prior art, the invention has the beneficial effects that: the invention can call the history record, compare the current data with the history data, the device is used for predicting the abnormality of the device, can predict the abnormality of the device, can maintain the device in time, ensures the service life of the device, and after the processing module obtains the data detected by each sensor, the data are transmitted into the storage module for storage, the working personnel can send instructions to the processing module through the signal output module to call the historical data stored in the storage module and compare the stored historical data with the currently collected data, when the existing data is similar to the data of the historical data when the abnormal data appears, and when the data of the existing data is highly similar to the data of the historical data, the deaerator is maintained and checked according to the processing means in the historical data, the abnormality of the deaerator can be checked in advance, and the service life of the equipment is prolonged.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a schematic view of a deoxygenated water circulation system of the present invention.

In the figure: the device comprises a 100 processing module, a 200 detection module, a 300 signal output module, a 400 storage module, a 500 display module, a 600 circulating pump, a 700 secondary deaerator and an 800 water pump.

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.

The invention provides a monitoring system for deaerating and water feeding of a steam turbine boiler, which can call a historical record, compare the current data with the historical data, predict the abnormality of equipment, predict the abnormality of the equipment, maintain the equipment in time and guarantee the service life of the equipment, and please refer to fig. 1, wherein the monitoring system comprises: the device comprises a processing module 100, a detection module 200, a signal output module 300, a storage module 400 and a display module 500;

referring again to fig. 1, the processing module 100 is a siemens S7-200smart programmable controller for performing data processing and controlling the modules and devices;

referring to fig. 1 again, the detection module 200 is connected to the processing module 100, and is configured to detect the liquid level, pressure, temperature, and oxygen content of the boiler deoxygenation water supply device and transmit the detected data to the processing module 100, the detection module 200 is a liquid level sensor, a pressure sensor, a temperature sensor, and an oxygen content sensor, the liquid level sensor, the water pressure sensor, and the temperature sensor are all installed inside the deoxygenator and are configured to detect the water level, the water pressure, and the water temperature inside the deoxygenator, and the oxygen content sensor is installed at the water outlet of the deoxygenator and is configured to detect the oxygen content of the deoxygenated water;

referring to fig. 1 again, the signal output module 300 is connected to the processing module 100, and is configured to transmit data processed by the processing module 100 to a personal device or a control center in a wireless or wired communication manner, and the personal device or the control center can also call the data in the processing module 100 through the signal output module 300, where the signal output module 300 is a wired signal output module and a wireless signal output module, the wired signal output module is an RS485 communication interface, the wireless signal output module is a WiFi module, a 4G module or a 5G module, the data processed by the processing module 100 is transmitted to the control center through the wired signal output module, the data processed by the processing module 100 is transmitted to the personal device through the wireless signal output module, and the data of the deaerator can be monitored in real time;

referring to fig. 1 again, the storage module 400 is connected to the processing module 100, and is used for storing the data processed by the processing module 100 and also retrieving the data in the storage module 400 through the processing module 100, after the processing module 100 obtains the data detected by each sensor, the data is transmitted to the storage module 400 for storage, and the staff can send an instruction to the processing module through the signal output module 300 to call the historical data stored in the storage module 400, compare the stored historical data with the currently acquired data, when the existing data is similar to the data of the historical data when the abnormal data appears, and when the data of the existing data is highly similar to the data of the historical data, the deaerator is maintained and checked according to a processing means in historical data, so that the abnormality of the deaerator can be checked in advance, and the service life of equipment is prolonged;

referring to fig. 1 again, the display module 500 is connected to the processing module 100 and configured to execute instructions input to the processing module 100 and display data stored in the storage module 400, the display module 500 is a touch display screen, and a maintenance worker on site can send an instruction to the processing module 100 through the display module 500 to retrieve historical data stored in the storage module 400, and perform maintenance on the device according to the historical data.

In order to reduce the erosion of oxygen to the boiler for carry out secondary deoxidization to the deoxidization water, reduce the oxygen content of water, still be provided with the circulation system on processing module 100, the circulation system includes:

referring to fig. 1-2, a circulating pump 600 is connected to a processing module 100 and a deaerator and used for pumping out deaerated water with unqualified deaerating, a three-way pipe is installed on a water outlet of the deaerator, the circulating pump 600 is installed on one water outlet of the three-way pipe, a water pump is installed on the other water outlet of the three-way pipe, the oxygen content of the water on the water outlet of the deaerator is detected through a detection module 200, when the oxygen content of the water exceeds the standard, the detection module 200 sends a signal to the processing module 100, the circulating pump 600 is started and the water pump is closed through the processing module 100, and the water with the oxygen content exceeding the standard is pumped out through the circulating pump 600;

referring to fig. 2 again, the secondary deaerator 700 is connected to the circulating pump 600 and is used for storing deaerated water pumped by the circulating pump 600 and performing secondary deaerating on the deaerated water, the circulating pump 600 pumps deaerated water with excessive oxygen content to the secondary deaerator 700, the secondary deaerator 700 performs secondary deaerating on the deaerated water with excessive oxygen content, the detection module 200 is also installed on the water outlet of the secondary deaerator 700, the three-way pipe is installed on the water outlet of the secondary deaerator 700, the circulating pump 600 is installed on one water outlet of the three-way pipe, the detection module 200 performs oxygen content detection on the deaerated water after secondary deaerating, and when the oxygen content of the water is still excessive, the circulating pump 600 returns the deaerated water to the secondary deaerator 700 to perform continuous deaerating until the detection is qualified;

referring to fig. 2 again, the water pump 800 is connected to the secondary deaerator 700, and is used for pumping deaerated water qualified for deaerating into the boiler from the secondary deaerator 700, when the deaerated water is qualified after the secondary deaerator is detected, the detection module 200 sends a signal to the processing module 100, the water pump 800 is started and the circulating pump 600 is closed through the processing module 100, the deaerated water qualified is pumped into the boiler through the water pump 800, the water with the excessive oxygen content can be effectively prevented from entering the boiler, the corrosion of oxygen to the boiler is reduced, and the service life of the boiler is prolonged.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.