阅读说明：本技术 空冷机组喷淋提效装置及自动喷淋控制方法 (Spraying effect-improving device of air cooling unit and automatic spraying control method ) 是由 贾朋伟 王发庆 祝广洲 尉礼辉 宋维鹏 李真达 王赞辉 王刚 代国良 张晓峰 吴 于 2021-09-28 设计创作，主要内容包括：本发明涉及一种空冷机组喷淋提效装置及自动喷淋控制方法。现有技术的空冷系统一般设计有换热器表面清洗装置,用于清洗换热器的积灰,提高换热效果,但是系统自动化程度不高,针对空冷效果差的问题效果一般。本发明其组成包括：集控室远程控制终端、散热板(1),散热板呈人字形结构,其内部安装有空冷岛风机(4),空冷岛风机与所述散热板的散热翅片之间安装有一组雾化喷嘴(2),雾化喷嘴安装在管道上,管道一端安装有调节阀(3),调节阀通过管道分别与一组高压水泵(5)连接,高压水泵通过管道上安装的滤网(6)与除盐水箱(7)连接,的高压水泵的出口处分别依次安装有流量传感器、压力传感器。本发明用于空冷机组喷淋提效装置。(The invention relates to a spraying effect-improving device of an air cooling unit and an automatic spraying control method. The air cooling system of prior art generally designs has heat exchanger surface cleaning device for the deposition of washing heat exchanger improves the heat transfer effect, but system degree of automation is not high, and is general to the poor problem effect of air cooling effect. The invention comprises the following components: centralized control room remote control terminal, heating panel (1), the heating panel is chevron shape structure, and its internally mounted has air cooling island fan (4), air cooling island fan with install a set of atomizing nozzle (2) between the radiating fin of heating panel, atomizing nozzle installs on the pipeline, and governing valve (3) are installed to pipeline one end, and the governing valve passes through the pipeline to be connected with a set of high pressure water pump (5) respectively, and high pressure water pump passes through filter screen (6) of installation on the pipeline and is connected with demineralized water tank (7), high pressure water pump's export punishment do not install flow sensor, pressure sensor in proper order. The invention is used for the spray effect-improving device of the air cooling unit.)

1. the utility model provides an air cooling unit sprays and carries effect device which constitutes and includes: centralized control room remote control terminal, heating panel 1, characterized by: the heating panel be chevron shape structure, its internally mounted has air cooling island fan, air cooling island fan with install a set of atomizing nozzle between the radiating fin of heating panel, atomizing nozzle install on the pipeline, pipeline one end install the governing valve, the governing valve pass through the pipeline and be connected with a set of high pressure water pump respectively, high pressure water pump pass through the filter screen of installation on the pipeline and be connected with the demineralized water tank, high pressure water pump's export punishment do not install flow sensor, pressure sensor in proper order.

2. The spraying efficiency-improving device of the air cooling unit as set forth in claim 1, characterized in that: the remote control terminal of the centralized control room is provided with an air cooling island economic backpressure comparison table, and backpressure recommended values of different temperature sections are calculated through unit load and ambient temperature.

3. An automatic spraying control method for the spraying effect-improving device of the air cooling unit as claimed in one of claims 1 or 2, characterized in that: the method comprises the following steps:

firstly, carrying out logic configuration on a remote control terminal of a centralized control room, acquiring a unit load P, a turbine exhaust temperature T1, a condenser pressure P, an upper temperature T4 of an air cooling island, an ambient air temperature T3, a water tank liquid level L and a high-pressure water pump outlet pressure measuring point P1, carrying out high-pressure water pump starting control and regulating valve opening control, and carrying out spraying system pressure and flow control Q;

arranging a flow sensor and a pressure sensor at the outlet of the high-pressure water pump, installing an electric valve in front of each air cooling unit, arranging an environment greenhouse transmitter detection device as the working condition of the spraying system, setting the protection values of temperature and humidity, and making a protection measure after the protection values are exceeded;

the control of spray water flow is carried out through the upper temperature of the air cooling unit, the spray water atomizing nozzle position control device is used for carrying out spray atomizing nozzle movement control, the supplementary effect improvement control of the air cooling system is realized, meanwhile, the air cooling efficiency calculation is carried out by combining the water inlet and outlet temperature difference T2 of the air cooling unit, the calculation of the operation efficiency of the air cooling system is monitored by combining the unit load P, the exhaust temperature of a steam turbine and the pressure P of a condenser, the optimal water spray quantity setting is formed, the system spray is carried out, and the unit efficiency is improved;

the operator can operate the field device through the configuration software and can perform sequential control or automatic adjustment mode on the field device through the logic editing of the configuration software.

Technical Field

The invention relates to the technical field of thermal power generation, in particular to a spraying efficiency-improving device of an air cooling unit and an automatic spraying control method.

Background

In a thermal power plant, last-stage steam is discharged after work is done in a steam turbine, smooth steam discharge is realized by heat dissipation and cooling, generally circulating water is adopted for cooling to reduce the steam discharge temperature, and an air cooling system is adopted for reducing the steam discharge temperature of the steam turbine in water shortage areas for water conservation; because of adopting the air to dispel the heat, the cooling heat dissipation effect project circulating water heat dissipation effect is poor, but there is the huge effect of water conservation, become the typical design of the thermal power plant of the water-deficient area, generally adopt direct air-cooled and indirect air-cooled two kinds, this system is suitable for these two forms, because adopt the air convection to dispel the heat, the temperature is higher in summer, when the load of the generating set is higher at the same time, the air-cooled system effect presents the heat-dissipating bottleneck, influence the load capacity of the unit take, the unit efficiency is reduced at the same time, the coal consumption is increased, the economy is reduced; the air cooling system has good water-saving effect and is widely applied to a power plant, but the output of a unit provided with the air cooling system is greatly influenced by the ambient temperature, the unit has high back pressure in high-temperature periods in summer, the coal consumption of the unit for generating electricity is increased, and the output of the unit is blocked when the unit is serious, so that a high-back-pressure trip accident occurs; an automatic spraying effect-improving system is designed for the air cooling island in summer, the heat exchange efficiency is improved by spraying and cooling, the backpressure of a unit is reduced, the unit works at full load, the unit can safely work in the summer with overhigh load, and good economical efficiency is obtained;

the air cooling system of prior art generally designs has heat exchanger surface cleaning device for the deposition of washing heat exchanger improves the heat transfer effect, but system degree of automation is not high, and is general to the poor problem effect of air cooling effect.

Disclosure of Invention

The invention aims to provide a spraying effect-improving device of an air cooling unit and an automatic spraying control method.

The above purpose is realized by the following technical scheme:

the utility model provides an air cooling unit sprays and carries effect device which constitutes and includes: centralized control room remote control terminal, heating panel, the heating panel be chevron shape structure, its internally mounted has air cooling island fan, air cooling island fan with install a set of atomizing nozzle between the radiating fin of heating panel, atomizing nozzle install on the pipeline, pipeline one end install the governing valve, the governing valve pass through the pipeline and be connected with a set of high pressure water pump respectively, high pressure water pump pass through the filter screen of installation on the pipeline and be connected with desalting water tank, high pressure water pump's export punishment do not install flow sensor, pressure sensor in proper order.

The air cooling unit sprays and carries the effect device, centralized control room remote control terminal be provided with air cooling island economic backpressure reference table, through unit load and ambient temperature, calculate the backpressure recommended value of different temperature sections.

The spraying effect-improving device of the air cooling unit and the automatic spraying control method comprise the following steps:

firstly, carrying out logic configuration on a remote control terminal of a centralized control room, acquiring a unit load P, a turbine exhaust temperature T1, a condenser pressure P, an upper temperature T4 of an air cooling island, an ambient air temperature T3, a water tank liquid level L and a high-pressure water pump outlet pressure measuring point P1, carrying out high-pressure water pump starting control and regulating valve opening control, and carrying out spraying system pressure and flow control Q;

arranging a flow sensor and a pressure sensor at the outlet of the high-pressure water pump, installing an electric valve in front of each air cooling unit, arranging an environment greenhouse transmitter detection device as the working condition of the spraying system, setting the protection values of temperature and humidity, and making a protection measure after the protection values are exceeded;

the control of spray water flow is carried out through the upper temperature of the air cooling unit, the spray water atomizing nozzle position control device is used for carrying out spray atomizing nozzle movement control, the supplementary effect improvement control of the air cooling system is realized, meanwhile, the air cooling efficiency calculation is carried out by combining the water inlet and outlet temperature difference T2 of the air cooling unit, the calculation of the operation efficiency of the air cooling system is monitored by combining the unit load P, the exhaust temperature of a steam turbine and the pressure P of a condenser, the optimal water spray quantity setting is formed, the system spray is carried out, and the unit efficiency is improved;

the operator can operate the field device through the configuration software and can perform sequential control or automatic adjustment mode on the field device through the logic editing of the configuration software.

Has the advantages that:

1. the invention relates to a spray efficiency-improving device of an air cooling unit and an automatic spray control method.

The invention reasonably arranges the atomizing nozzles between the air cooling island fan and the radiating fins, the atomization sprayed by the nozzles is fully contacted with the air to form an air-water mixture, the ambient temperature and the humidity of the surrounding local space are reduced, the humidified and cooled air-water mixture is brought to and attached to the surface of the tube bundle of the radiator by the radiating fan, and the heat on the surface of the radiator is removed by the rapid evaporation of the attached water mist, so that the air temperature and the surface temperature of the tube bundle are rapidly reduced, the backpressure is reduced, the vacuum is improved, and the power generation load is safely increased.

The remote control terminal of the centralized control room is provided with an air cooling island economic backpressure comparison table, backpressure recommended values of different temperature sections are calculated through unit load and ambient temperature, the unit is guided to operate in the optimal economic section, and after the backpressure recommended values of different load sections are calculated by the remote control terminal, the spraying effect-improving system performs water spraying amount control, so that balance between water spraying amount and unit economic operation is realized.

The invention enables operators to operate the field equipment through the configuration software, and can carry out sequential control and automatic regulation mode on the field equipment through the logic editing of the configuration software, thereby improving the automation degree of the system.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a block diagram of the automatic spray control of the present invention.

Wherein: 1. the system comprises a heat dissipation plate, 2, an atomizing nozzle, 3, a regulating valve, 4, an air cooling island fan, 5, a high-pressure water pump, 6, a filter screen, 7 and a desalting water tank.

The specific implementation mode is as follows:

example 1:

the utility model provides an air cooling unit sprays and carries effect device which constitutes and includes: centralized control room remote control terminal, heating panel 1, the heating panel be chevron shape structure, its internally mounted has air cooling island fan 4, air cooling island fan with install a set of atomizing nozzle 2 between the radiating fin of heating panel, atomizing nozzle install on the pipeline, pipeline one end install governing valve 3, the governing valve pass through the pipeline and be connected with a set of high pressure water pump 5 respectively, high pressure water pump pass through the pipeline on the filter screen 6 of installation be connected with demineralized water tank 7, high pressure water pump's export punishment do not install flow sensor, pressure sensor in proper order.

Example 2:

according to the air cooling unit spraying effect-improving device in the embodiment 1, the remote control terminal of the centralized control room is provided with an air cooling island economic backpressure comparison table, and backpressure recommended values of different temperature sections are calculated through unit load and ambient air temperature.

Example 3:

the automatic spraying control method of the spraying effect-improving device of the air cooling unit according to the embodiment 1 or 2 comprises the following steps: firstly, carrying out logic configuration on a remote control terminal of a centralized control room, acquiring a unit load P, a turbine exhaust temperature T1, a condenser pressure P, an upper temperature T4 of an air cooling island, an ambient air temperature T3, a water tank liquid level L and a high-pressure water pump outlet pressure measuring point P1, carrying out high-pressure water pump starting control and regulating valve opening control, and carrying out spraying system pressure and flow control Q;

arranging a flow sensor and a pressure sensor at the outlet of the high-pressure water pump, installing an electric valve in front of each air cooling unit, arranging an environment greenhouse transmitter detection device as the working condition of the spraying system, setting the protection values of temperature and humidity, and making a protection measure after the protection values are exceeded;

the control of spray water flow is carried out through the upper temperature of the air cooling unit, the spray water atomizing nozzle position control device is used for carrying out spray atomizing nozzle movement control, the supplementary effect improvement control of the air cooling system is realized, meanwhile, the air cooling efficiency calculation is carried out by combining the water inlet and outlet temperature difference T2 of the air cooling unit, the calculation of the operation efficiency of the air cooling system is monitored by combining the unit load P, the exhaust temperature of a steam turbine and the pressure P of a condenser, the optimal water spray quantity setting is formed, the system spray is carried out, and the unit efficiency is improved;

the operating personnel can operate the field equipment through the configuration software, and can carry out sequential control or automatic regulation mode on the field equipment through the logic editing of the configuration software, thereby improving the automation degree of the system.

The spraying effect-improving device of the air cooling unit is provided with various sensors, a flow sensor and a pressure sensor are arranged at the outlet of a high-pressure pump, the system is monitored and protected in all directions, an electric valve is arranged in front of each cooling spraying unit to meet the requirement of full-automatic intelligent control, an environmental greenhouse transmitter detection device is arranged to serve as the working condition of the spraying system, the protection values of temperature and humidity are set, and the system takes corresponding protection measures after the protection values are exceeded;

the atomizing nozzle can atomize water through water pressure, the nozzles of different types and the flow and the spraying pressure of different scales influence the size of sprayed liquid drops, and the effect is better when the liquid drops are smaller in normal operation. The arrangement position of the nozzles is reasonably made, and the maximized spraying coverage is ensured;

the high-pressure water pump has adjustable output and can set the optimal working pressure and flow rate, so that the atomizing nozzle can achieve the optimal effect. Setting logic programming, namely starting the pump by one key, installing vibration and temperature monitoring elements of the pump for monitoring, and reflecting the running condition of the pump at any time;

the desalting water tank is characterized in that the desalting water is taken from a desalting water system of a power plant, an electric valve is arranged on a connecting pipeline, the desalting water can be added to the water tank according to actual conditions, and a real-time liquid level meter is arranged on the water tank and used as reference data for the desalting water adding work;

this application 1 unit air cooling island totally 7 are listed as 8 and are arranged 56 cooling unit, wherein every row 2, 6 are listed as the countercurrent tube bank, every cooling unit configuration cooling blower, cooling blower adopts standard axial fan, the diameter 9.14 meters, every fan configuration converter, every unit air cooling island spray set is by 4 multistage centrifugal pumps, spray water pipeline and cooling unit nozzle are constituteed, every cooling unit is equipped with high-efficient meticulous atomizing nozzle 46, divide into two and arrange "chevron" in two, the water of spraying is reverse osmosis water and demineralized water and uses in turn.

The signal control table of the application is as follows: