CN104976637A - Method for calculating cold air leakage amount of inlet of coal mill for thermal power generation boiler - Google Patents
Method for calculating cold air leakage amount of inlet of coal mill for thermal power generation boiler Download PDFInfo
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Abstract
一种用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法，包其步骤是：Fl=Fh×（Th×Ch-Tr×Cr）/（Tl×Cl-Tr×Cr），其中：Fl设置为磨煤机入口冷风泄漏量，Fh设置为磨煤机入口混合风量，Th设置为磨煤机入口混合风温，Ch设置为磨煤机入口混合风定压比热容，Tr设置为磨煤机入口热风温，Cr设置为磨煤机入口热风定压比热容，Tl设置为磨煤机入口冷风温，Cl设置为磨煤机入口冷风定压比热容；提供了直吹式制粉系统磨煤机冷风入口风门挡板的调节标准量，减少直吹式制粉系统冷风内漏量，提高磨煤机干燥出力，有效降低锅炉排烟温度，不再通过试验值得到直吹式制粉系统磨煤机冷风入口风门挡板的调节标准量，因此提高锅炉燃烧系统的稳定性和安全性，提高了直吹式制粉系统磨煤机冷风入口风门挡板的调节效率。A calculation method for the cold air leakage at the coal mill inlet of a thermal power boiler, including the steps: Fl=Fh×(Th×Ch-Tr×Cr)/(Tl×Cl-Tr×Cr), where : Fl is set to the cold air leakage at the coal mill inlet, Fh is set to the mixed air volume at the coal mill inlet, Th is set to the mixed air temperature at the coal mill inlet, Ch is set to the specific heat capacity of the coal mill inlet mixed air at constant pressure, and Tr is set to the The hot air temperature at the coal mill inlet, Cr is set as the specific heat capacity of the hot air at the coal mill inlet at constant pressure, Tl is set as the cold air temperature at the coal mill inlet, and Cl is set as the specific heat capacity of the cold air at the coal mill inlet at constant pressure; a direct blowing pulverizing system is provided for coal grinding The adjustment standard amount of the air door baffle at the inlet of the machine cold air reduces the internal leakage of the cold air in the direct blown pulverizing system, improves the drying output of the coal mill, and effectively reduces the exhaust gas temperature of the boiler. The adjustment standard amount of the air door baffle at the cold air inlet of the coal machine, thus improving the stability and safety of the boiler combustion system, and improving the adjustment efficiency of the air door baffle at the cold air inlet of the coal mill in the direct blowing pulverizing system.
Description
一、 技术领域 1. Technical field
本发明专利涉及一种磨煤机入口冷风泄漏量的计算方法，尤其是一种用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法。 The patent of the present invention relates to a method for calculating the leakage of cold air at the inlet of a coal mill, especially a method for calculating the leakage of cold air at the inlet of a coal mill in a thermal power boiler.
二、 背景技术 2. Background technology
火力发电厂机组运行的安全性及经济性主要取决于锅炉系统，而影响锅炉系统运行安全性及经济性的因素是锅炉燃煤的制粉系统，火力发电厂制粉系统的任务是设置为锅炉提供数量和质量都符合燃烧要求的煤粉。现有的火力发电企业煤粉制备系统主要分设置为以下几类：（1）中储式钢球磨煤机系统；（2）直吹式双进双出钢球磨煤机系统；（3）直吹式中速磨煤机系统。由于直吹式制粉系统因其系统布置相对简单、可靠性高、适应煤种能力强优点得到广泛应用； The safety and economy of thermal power plant unit operation mainly depend on the boiler system, and the factor that affects the safety and economy of boiler system operation is the coal-fired pulverization system of the boiler. The task of the thermal power plant pulverization system is to set it as a boiler Provide pulverized coal that meets the combustion requirements in quantity and quality. The existing pulverized coal preparation systems of thermal power generation enterprises are mainly divided into the following categories: (1) medium storage steel ball coal mill system; (2) direct blowing double-inlet and double-outlet steel ball coal mill system; (3) direct blowing type Medium speed pulverizer system. Due to the advantages of relatively simple system layout, high reliability and strong ability to adapt to coal types, the direct blowing pulverizing system is widely used;
对于直吹式制粉系统而言，磨煤机入口冷风泄漏量直接影响磨煤机的干燥出力，冷风泄漏量过大将排挤同体积的磨煤机入口热风，从而导致直吹式制粉系统磨煤机干燥出力不足，使锅炉排烟温度升高，严重时将影响锅炉燃烧稳定及安全，在各火力发电厂在直吹式制粉系统磨煤机干燥出力控制调整方面电流方面主要存在以下两个问题：其一直吹式制粉系统属正压式制粉系统，相对于中储式制粉系统而言，直吹式制粉系统阀门及挡板的外漏问题明显，内漏问题表现不明显，难于在线诊断及维护；其二同时正压直吹式制粉系统受设计条件影响，冷风压力高于热风压力，由此带来磨煤机入口冷风挡板磨损导致的冷风泄漏量大； For the direct-blowing pulverizing system, the leakage of cold air at the coal mill inlet directly affects the drying output of the coal mill. If the leakage of cold air is too large, the hot air at the coal mill inlet of the same volume will be displaced, resulting in the grinding of the direct-blowing pulverizing system. Insufficient drying output of the coal machine will increase the exhaust gas temperature of the boiler. In severe cases, it will affect the stability and safety of the boiler combustion. In various thermal power plants, there are mainly the following two aspects in the current aspect of the control and adjustment of the drying output of the coal mill in the direct blowing pulverization system. A problem: the straight-blowing pulverizing system is a positive pressure pulverizing system. Compared with the intermediate storage pulverizing system, the direct-blowing pulverizing system has obvious problems of external leakage of valves and baffles, and internal leakage is not obvious. Obviously, it is difficult to diagnose and maintain online; secondly, affected by the design conditions of the positive pressure direct-blown pulverizing system, the pressure of the cold air is higher than that of the hot air, which leads to a large amount of cold air leakage caused by the wear of the cold air baffle at the entrance of the coal mill;
为了保证火力发电厂机组运行的安全性和提高其经济性，对火力发电锅炉中的磨煤机入口冷风泄漏量进行计算和控制具有很重要的意义，因此用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法是一种重要的计算方法，现在还没有一种用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法。 In order to ensure the safety of thermal power plant unit operation and improve its economy, it is of great significance to calculate and control the leakage of cold air at the inlet of the coal mill in the thermal power boiler, so it is used for the coal mill in the thermal power boiler The calculation method of the inlet cold air leakage is an important calculation method, and there is no calculation method for the inlet cold air leakage of the coal mill in the thermal power boiler.
三、 发明内容 3. Contents of the invention
为了克服上述技术缺点，本发明专利的目的是提供一种用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法，因此提高锅炉燃烧系统的稳定性和安全性，提高了直吹式制粉系统磨煤机冷风入口风门挡板的调节效率。 In order to overcome the above-mentioned technical shortcomings, the purpose of this invention patent is to provide a calculation method for the leakage of cold air at the coal mill inlet in thermal power boilers, thereby improving the stability and safety of the boiler combustion system and improving the efficiency of the direct blowing system. Adjustment efficiency of damper damper at cold air inlet of pulverizer in pulverizing system.
为了达到上述目的，本发明专利采取的技术方案是：其步骤是： In order to achieve the above object, the technical scheme that the patent of the present invention takes is: its steps are:
应用条件：直吹式制粉系统磨煤机运行且磨煤机电流大于25A和直吹式制粉系统磨煤机入口冷风档板开度反馈＜3%； Application conditions: the coal mill of the direct blowing pulverizing system is running and the current of the pulverizer is greater than 25A, and the opening feedback of the cold air baffle plate at the inlet of the pulverizing system of the direct blowing pulverizing system is <3%;
Fl=Fh×（Th×Ch-Tr×Cr）/（Tl×Cl-Tr×Cr）， Fl=Fh×(Th×Ch-Tr×Cr)/(Tl×Cl-Tr×Cr),
其中： in:
Fl设置为磨煤机入口冷风泄漏量， Fl is set as the leakage of cold air at the entrance of the coal mill,
Fh设置为磨煤机入口混合风量， Fh is set as the mixing air volume at the coal mill inlet,
Th设置为磨煤机入口混合风温， Th is set as the mixed air temperature at the coal mill inlet,
Ch设置为磨煤机入口混合风定压比热容， Ch is set to the specific heat capacity of the mixed air at the inlet of the coal mill at constant pressure,
Tr设置为磨煤机入口热风温， Tr is set to the hot air temperature at the coal mill inlet,
Cr设置为磨煤机入口热风定压比热容， Cr is set as the specific heat capacity of the hot air at the inlet of the coal mill at constant pressure,
Tl设置为磨煤机入口冷风温， Tl is set as the temperature of the cold air at the inlet of the pulverizer,
Cl设置为磨煤机入口冷风定压比热容； Cl is set as the specific heat capacity of the cold air at the inlet of the coal mill at constant pressure;
在本实施例中，直吹式制粉系统磨煤机入口干燥介质定压比热容C=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5， In this example, the specific heat capacity of the drying medium at the inlet of the pulverizer of the direct blowing pulverizing system at constant pressure C=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T ^3+5.863/10^14×T^4-7.337/10^18×T^5,
其中T设置为干燥介质分别设置为热风、混合风和冷风的摄氏温度； Among them, T is set as the temperature in Celsius of the drying medium being set to hot air, mixed air and cold air respectively;
当T设置为干燥介质为混合风的实时动态测量摄氏温度值，Ch=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5； When T is set as the real-time dynamic measurement Celsius temperature value of mixed wind as the drying medium, Ch=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863 /10^14×T^4-7.337/10^18×T^5;
当其中T设置为干燥介质为热风的实时动态测量摄氏温度值，Cr=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5； When T is set as the real-time dynamic measurement Celsius temperature value of hot air as the drying medium, Cr=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863 /10^14×T^4-7.337/10^18×T^5;
当其中T设置为干燥介质为冷风的实时动态测量摄氏温度值， When T is set as the real-time dynamic measurement Celsius temperature value of cold air as the drying medium,
Cl=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5； Cl=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^ 5;
在本实施例中， In this example,
Fh设置为磨煤机入口混合风量并且设置为实时动态测量值， Fh is set as the mixing air volume at the entrance of the coal mill and is set as the real-time dynamic measurement value,
Th设置为磨煤机入口混合风温并且设置为实时动态测量值， Th is set as the mixed air temperature at the coal mill inlet and is set as the real-time dynamic measurement value,
Tr设置为磨煤机入口热风温并且设置为实时动态测量值， Tr is set as the hot air temperature at the coal mill inlet and is set as the real-time dynamic measurement value,
Tl设置为磨煤机入口冷风温并且设置为实时动态测量值。 Tl is set as the temperature of the cold air at the inlet of the coal mill and is set as the real-time dynamic measurement value.
由于设计了对直吹式制粉系统磨煤机入口冷风泄漏量的计算方法，提供了直吹式制粉系统磨煤机冷风入口风门挡板的调节标准量，减少直吹式制粉系统冷风内漏量，提高磨煤机干燥出力，有效降低锅炉排烟温度，不再通过试验值得到直吹式制粉系统磨煤机冷风入口风门挡板的调节标准量，因此提高锅炉燃烧系统的稳定性和安全性，提高了直吹式制粉系统磨煤机冷风入口风门挡板的调节效率。 Due to the design of the calculation method of the cold air leakage at the coal mill inlet of the direct blowing pulverizing system, the adjustment standard amount of the air gate baffle at the coal pulverizer inlet of the direct blowing pulverizing system is provided, and the cold air of the direct blowing pulverizing system is reduced The amount of internal leakage can increase the drying output of the coal mill, effectively reduce the boiler exhaust gas temperature, and no longer pass the test value to obtain the adjustment standard amount of the cold air inlet damper of the coal mill in the direct blowing pulverizing system, thus improving the stability of the boiler combustion system It improves the efficiency and safety of the air door baffle at the cold air inlet of the pulverizer in the direct blowing pulverizing system.
本发明设计了，把用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法的程序设置为植入到火力发电厂DCS控制系统直吹式制粉系统控制模块中。 The present invention designs that the program for the calculation method of the cold air leakage at the inlet of the coal mill in the thermal power boiler is set to be embedded in the control module of the direct blowing pulverizing system of the DCS control system of the thermal power plant.
本发明的技术方案中，所选取的参数要满足制粉系统通风量的质量守恒和热量守恒条件，即：质量守恒：进入磨煤机的热风风量与冷风风量的总和等于磨煤机的混合风量，热量守恒：进入磨煤机的热风带入热量与冷风带入热量的总和等于磨煤机混合风的热量。^是“次方”的含义，在各类工程计算软件中如：3.013/10^5则表示为3.013/100000。 In the technical solution of the present invention, the selected parameters must meet the mass conservation and heat conservation conditions of the ventilation volume of the pulverizing system, that is: mass conservation: the sum of the hot air volume and the cold air volume entering the coal mill is equal to the mixing air volume of the coal mill , Conservation of heat: the sum of the heat brought by the hot air entering the coal mill and the heat brought by the cold air is equal to the heat of the mixed air of the coal mill. ^ is the meaning of "power", in various engineering calculation software such as: 3.013/10^5 is expressed as 3.013/100000.
在本技术方案中，对直吹式制粉系统磨煤机的风量、风温和定压比热容设置为重要技术特征，在用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法的技术领域中，具有新颖性、创造性和实用性，在本技术方案中的术语都是可以用本技术领域中的专利文献进行解释和理解。 In this technical proposal, the air volume, air temperature and constant pressure specific heat capacity of the pulverizer of the direct blowing pulverizing system are set as important technical features, and the technology used in the calculation method of the cold air leakage at the coal pulverizer inlet in the thermal power boiler In the field, there is novelty, creativity and practicality, and the terms in this technical solution can be explained and understood with the patent documents in this technical field.
四、 具体实施方式 4. Specific implementation
下面结合实施例，对本发明进一步描述，以下实施例旨在说明本发明而不是对本发明的进一步限定。 The present invention will be further described below in conjunction with the examples, and the following examples are intended to illustrate the present invention rather than further limit the present invention.
本发明的第一个实施例， 本发明的技术方案，其步骤是： First embodiment of the present invention, the technical solution of the present invention, its steps are:
应用条件：直吹式制粉系统磨煤机运行且磨煤机电流大于25A和直吹式制粉系统磨煤机入口冷风档板开度反馈＜3%； Application conditions: the coal mill of the direct blowing pulverizing system is running and the current of the pulverizer is greater than 25A, and the opening feedback of the cold air baffle plate at the inlet of the pulverizing system of the direct blowing pulverizing system is <3%;
Fl=Fh×（Th×Ch-Tr×Cr）/（Tl×Cl-Tr×Cr）， Fl=Fh×(Th×Ch-Tr×Cr)/(Tl×Cl-Tr×Cr),
其中： in:
Fl设置为磨煤机入口冷风泄漏量， Fl is set as the leakage of cold air at the entrance of the coal mill,
Fh设置为磨煤机入口混合风量， Fh is set as the mixing air volume at the coal mill inlet,
Th设置为磨煤机入口混合风温， Th is set as the mixed air temperature at the coal mill inlet,
Ch设置为磨煤机入口混合风定压比热容， Ch is set to the specific heat capacity of the mixed air at the inlet of the coal mill at constant pressure,
Tr设置为磨煤机入口热风温， Tr is set to the hot air temperature at the coal mill inlet,
Cr设置为磨煤机入口热风定压比热容， Cr is set as the specific heat capacity of the hot air at the inlet of the coal mill at constant pressure,
Tl设置为磨煤机入口冷风温， Tl is set as the temperature of the cold air at the inlet of the pulverizer,
Cl设置为磨煤机入口冷风定压比热容； Cl is set as the specific heat capacity of the cold air at the inlet of the coal mill at constant pressure;
在本实施例中，直吹式制粉系统磨煤机入口干燥介质定压比热容C=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5， In this example, the specific heat capacity of the drying medium at the inlet of the pulverizer of the direct blowing pulverizing system at constant pressure C=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T ^3+5.863/10^14×T^4-7.337/10^18×T^5,
其中T设置为干燥介质分别设置为热风、混合风和冷风的摄氏温度； Among them, T is set as the temperature in Celsius of the drying medium being set to hot air, mixed air and cold air respectively;
当T设置为干燥介质为混合风的实时动态测量摄氏温度值，Ch=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5； When T is set as the real-time dynamic measurement Celsius temperature value of mixed wind as the drying medium, Ch=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863 /10^14×T^4-7.337/10^18×T^5;
当其中T设置为干燥介质为热风的实时动态测量摄氏温度值，Cr=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5； When T is set as the real-time dynamic measurement Celsius temperature value of hot air as the drying medium, Cr=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863 /10^14×T^4-7.337/10^18×T^5;
当其中T设置为干燥介质为冷风的实时动态测量摄氏温度值， When T is set as the real-time dynamic measurement Celsius temperature value of cold air as the drying medium,
Cl=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^5； Cl=1.319+3.013/10^5×T+2.118/10^7×T^2-1.746/10^10×T^3+5.863/10^14×T^4-7.337/10^18×T^ 5;
在本实施例中， In this example,
Fh设置为磨煤机入口混合风量并且设置为实时动态测量值， Fh is set as the mixing air volume at the entrance of the coal mill and is set as the real-time dynamic measurement value,
Th设置为磨煤机入口混合风温并且设置为实时动态测量值， Th is set as the mixed air temperature at the coal mill inlet and is set as the real-time dynamic measurement value,
Tr设置为磨煤机入口热风温并且设置为实时动态测量值， Tr is set as the hot air temperature at the coal mill inlet and is set as the real-time dynamic measurement value,
Tl设置为磨煤机入口冷风温并且设置为实时动态测量值； T1 is set as the cold air temperature at the entrance of the coal mill and is set as the real-time dynamic measurement value;
通过对热风、混合风和冷风的摄氏温度的实时动态测量得到T值，计算得到Ch、Cr和Cl值，通过实时动态测量得到Fh、Th、Tr和Tl值，计算得到Fl值，通过Fl值控制火力发电厂机组的锅炉的燃烧系统。 Through the real-time dynamic measurement of the Celsius temperature of hot air, mixed air and cold air, the T value can be obtained, and the Ch, Cr and Cl values can be obtained by calculation. The Fh, Th, Tr and Tl values can be obtained by real-time dynamic measurement, and the Fl value can be obtained by calculation. Control the combustion system of the boiler of the thermal power plant unit.
1000MW机组直吹式制粉系统磨煤机型号为BBD4360磨煤机
在未采用本实施前，无法在线估量磨煤机入口冷风泄漏率，在采用本实施例后，利用本方法发现磨煤机入口冷风泄漏率为约10-15%左右，通过对多台磨煤机入口冷风门改造，将冷风泄漏率降低为3%以下，使锅炉排烟温度降低约3℃左右，使机组发电煤耗降低约0.4g/kWh，提高了机组整体经济性。 Before this implementation was adopted, the cold air leakage rate at the entrance of the coal mill could not be estimated online. After adopting this embodiment, it was found that the cold air leakage rate at the entrance of the coal mill was about 10-15%. The renovation of the cold air door at the inlet of the machine reduces the leakage rate of the cold air to less than 3%, reduces the exhaust gas temperature of the boiler by about 3°C, reduces the coal consumption of the unit for power generation by about 0.4g/kWh, and improves the overall economic efficiency of the unit.
本发明专利具有下特点： The invention patent has the following characteristics:
1、由于设计了对直吹式制粉系统磨煤机入口冷风泄漏量的计算方法，提供了直吹式制粉系统磨煤机冷风入口风门挡板的调节标准量，减少直吹式制粉系统冷风内漏量，提高磨煤机干燥出力，有效降低锅炉排烟温度，不再通过试验值得到直吹式制粉系统磨煤机冷风入口风门挡板的调节标准量，因此提高锅炉燃烧系统的稳定性和安全性，提高了直吹式制粉系统磨煤机冷风入口风门挡板的调节效率。 1. Due to the design of the calculation method for the cold air leakage at the coal mill inlet of the direct-blowing pulverizing system, the adjustment standard amount of the air door baffle at the coal pulverizer inlet of the direct-blowing pulverizing system is provided, reducing the direct-blowing pulverizing system The internal leakage of the cold air in the system can increase the drying output of the coal mill, effectively reduce the boiler exhaust gas temperature, and no longer pass the test value to obtain the adjustment standard amount of the cold air inlet damper of the coal mill in the direct blowing pulverizing system, so the boiler combustion system can be improved. The stability and safety of the system improve the adjustment efficiency of the air door baffle of the cold air inlet of the coal pulverizer of the direct blowing pulverizing system.
2、由于设计了对直吹式制粉系统磨煤机入口冷风泄漏量的计算方法，通过实时动态测量，得到实时动态的磨煤机入口冷风泄漏量，提高了锅炉燃烧系统运行的可靠性能。 2. Due to the design of the calculation method of the cold air leakage at the coal mill inlet of the direct blowing pulverizing system, through real-time dynamic measurement, the real-time dynamic cold air leakage at the coal mill inlet is obtained, which improves the reliability of the boiler combustion system operation.
3、由于设计了对结构形状进行了数值范围的限定，使数值范围设置为本发明专利的技术方案中的技术特征，不是通过公式计算或通过有限次试验得出的技术特征，试验表明该数值范围的技术特征取得了很好的技术效果。 3. Due to the limitation of the numerical range of the structural shape, the numerical range is set as the technical feature in the technical solution of the patent of the present invention, not the technical feature obtained through formula calculation or limited number of tests. The test shows that the numerical value The technical characteristics of the range have achieved great technical results.
4、由于设计了本发明专利的技术特征，在技术特征的单独和相互之间的集合的作用，通过试验表明，本发明专利的各项性能指标设置为现有的各项性能指标的至少设置为1.7倍，通过评估具有很好的市场价值。 4. Due to the design of the technical features of the patent of the present invention, the effects of the individual and mutual collection of the technical features, it has been shown through experiments that the various performance indicators of the patent of the present invention are set to at least the settings of the existing various performance indicators It is 1.7 times, and has a very good market value through evaluation.
上述实施例只是本发明所提供的用于火力发电锅炉中的磨煤机入口冷风泄漏量的计算方法的一种实现形式，根据本发明所提供的方案的其他变形，增加或者减少其中的成份或步骤，或者将本发明用于其他的与本发明接近的技术领域，均属于本发明的保护范围。 The above-mentioned embodiment is only an implementation form of the calculation method for the cold air leakage at the inlet of the coal mill in the thermal power boiler provided by the present invention. According to other modifications of the scheme provided by the present invention, the components or steps, or using the present invention in other technical fields close to the present invention, all belong to the protection scope of the present invention.
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