CN111457733A - Energy-saving environment-friendly combustion heating system of building component fire-resistant experimental furnace - Google Patents
Energy-saving environment-friendly combustion heating system of building component fire-resistant experimental furnace Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 44
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 230000009970 fire resistant effect Effects 0.000 title claims 7
- 239000007789 gas Substances 0.000 claims abstract description 42
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003345 natural gas Substances 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims 2
- 239000003546 flue gas Substances 0.000 abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 13
- 239000000779 smoke Substances 0.000 abstract description 12
- 230000009977 dual effect Effects 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 239000003517 fume Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
- F27B17/02—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00 specially designed for laboratory use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/10—Arrangements for using waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
本发明公开了一种建筑构件耐火实验炉节能环保燃烧加热系统，包括加热炉、与加热炉内部连通的烧嘴、设置于加热炉上方的烟罩、连接所述加热炉排烟口的排烟管道、换热器及排气烟囱，所述换热器的热源入口连接所述排烟管道，热源出口连接所述排气烟囱，冷源入口连接所述烟罩，冷源出口通过助燃管道连接所述烧嘴，所述烧嘴连接天然气管道。本发明与现有技术相比更加节能，使用燃料更少，排放温度更低，同时废气排放较以前有大幅度降低甚至达到0废气排放，实现无污染，环保节能的燃烧系统。本发明具有加热炉和焚烧炉双重功能，在燃烧加热的同时，可以把排放的烟气抽回进炉内当作烟气焚烧炉使用。
The invention discloses an energy-saving and environment-friendly combustion heating system for a refractory experimental furnace for building components, comprising a heating furnace, a burner communicated with the inside of the heating furnace, a smoke hood arranged above the heating furnace, and a smoke exhaust connected to the smoke exhaust port of the heating furnace Pipe, heat exchanger and exhaust chimney, the heat source inlet of the heat exchanger is connected to the exhaust pipe, the heat source outlet is connected to the exhaust chimney, the cold source inlet is connected to the hood, and the cold source outlet is connected through a combustion-supporting pipe The burner is connected to a natural gas pipeline. Compared with the prior art, the present invention is more energy-saving, uses less fuel, and has a lower discharge temperature. At the same time, the exhaust gas emission is greatly reduced or even reaches zero exhaust gas emission compared with the previous one, thereby realizing a pollution-free, environment-friendly and energy-saving combustion system. The invention has the dual functions of a heating furnace and an incinerator, and at the same time of burning and heating, the exhausted flue gas can be drawn back into the furnace and used as a flue gas incinerator.
Description
技术领域technical field
本发明涉及建筑构件耐火检测领域，具体涉及一种建筑构件耐火实验炉节能环保燃烧加热系统。The invention relates to the field of fire-resistance detection of building components, in particular to an energy-saving and environment-friendly combustion heating system for a fire-resistance experimental furnace of building components.
背景技术Background technique
耐火构件炉是检测建筑构件，如(防火门、防火窗、耐火涂料等)耐温极限性能的设备，常应用于建筑科学研究院或防火实验中，是消防检测、防火产品检测的必备设备。此套设备按照《GB/T9978.1-2008建筑构件耐火实验方法》建立，满足T＝345*lg(8t+1)+20的升温速度控制。实验炉加热是通过燃烧天然气或液化气实现的，最高加热到1200摄氏度，来模拟火灾现场的温度，进一步实际考察防火门或防火窗等建筑构件的耐火极限性能及变形状态，以此来给产品分级。Refractory component furnace is a device for testing the temperature limit performance of building components, such as (fire doors, fire windows, refractory coatings, etc.) . This set of equipment is established in accordance with the "GB/T9978.1-2008 Fire Resistance Test Method for Building Components", which satisfies the heating rate control of T=345*lg(8t+1)+20. The heating of the experimental furnace is realized by burning natural gas or liquefied gas, and the maximum heating is 1200 degrees Celsius to simulate the temperature of the fire scene, and further practically investigate the fire resistance limit performance and deformation state of building components such as fire doors or fire windows. Grading.
在检测过程中，会往炉外冒出大量烟气，烟气的成分会随着被检测产品的不同而发生变化，通常包含以下几种成分：1；烟尘、2、酸性物质；3、有机废气；4、卤素根。这些烟气需要经过烟气需要通过烟罩收集后再次通过焚烧环保设备(加热至750-830摄氏度)处理后再排放。由于炉内采用天然气和空气燃烧，只产生二氧化碳和水，所以炉内高温烟气中基本上不含有污染物，只是烟气排放温度较高，大量热量能源被排放到大气中，产生能源的浪费。During the detection process, a large amount of smoke will be emitted outside the furnace, and the composition of the smoke will change with the different products to be tested. It usually contains the following components: 1. soot, 2. acidic substances; 3. organic Exhaust gas; 4, halogen root. These flue gases need to be collected through a fume hood and then processed by incineration environmental protection equipment (heated to 750-830 degrees Celsius) before being discharged. Since natural gas and air are used for combustion in the furnace, only carbon dioxide and water are produced, so the high-temperature flue gas in the furnace basically does not contain pollutants, but the flue gas discharge temperature is high, and a large amount of heat energy is discharged into the atmosphere, resulting in waste of energy. .
综上所述，现有的加热系统存在以下缺陷：无余热回收功能，排放温度高，产生大量能源的浪费，并且烟气排放需要依赖焚烧类的环保设备处理烟气才能满足达标排放。To sum up, the existing heating system has the following defects: no waste heat recovery function, high discharge temperature, resulting in a large amount of energy waste, and flue gas emissions need to rely on incineration-type environmental protection equipment to process flue gas to meet emission standards.
发明内容SUMMARY OF THE INVENTION
本发明所要解决的技术问题是提供一种建筑构件耐火实验炉节能环保燃烧加热系统，它可以解决现有技术中耐火构件炉的燃烧系统能源浪费严重、烟气排放需要依赖环保设备处理的问题。The technical problem to be solved by the present invention is to provide an energy-saving and environment-friendly combustion heating system for a building component refractory experimental furnace, which can solve the problems of serious energy waste in the combustion system of the refractory component furnace in the prior art and the need to rely on environmental protection equipment for flue gas emissions.
为了解决上述问题，本发明采用以下技术方案：In order to solve the above problems, the present invention adopts the following technical solutions:
本发明提供一种建筑构件耐火实验炉节能环保燃烧加热系统，包括加热炉、与加热炉内部连通的烧嘴、设置于加热炉上方的烟罩、连接所述加热炉排烟口的排烟管道、换热器及排气烟囱，所述换热器的热源入口连接所述排烟管道，热源出口连接所述排气烟囱，冷源入口连接所述烟罩，冷源出口通过助燃管道连接所述烧嘴，所述烧嘴连接天然气管道。The invention provides an energy-saving and environment-friendly combustion heating system for a refractory experimental furnace for building components, comprising a heating furnace, a burner communicated with the inside of the heating furnace, a smoke hood arranged above the heating furnace, and a smoke exhaust pipe connected to the smoke exhaust port of the heating furnace , heat exchanger and exhaust chimney, the heat source inlet of the heat exchanger is connected to the exhaust pipe, the heat source outlet is connected to the exhaust chimney, the cold source inlet is connected to the hood, and the cold source outlet is connected to the exhaust pipe through the combustion-supporting pipe. The burner is connected to the natural gas pipeline.
作为优选的技术方案，所述助燃管道沿换热器至烧嘴的方向依次设有电动补氧阀、助燃风机、氧含量分析仪、空气压力表、风压开关、空气调节阀、空气限流阀及空气补偿器。As a preferred technical solution, the combustion-supporting pipeline is sequentially provided with an electric oxygen supplement valve, a combustion-supporting fan, an oxygen content analyzer, an air pressure gauge, an air pressure switch, an air regulating valve, and an air limiting valve along the direction from the heat exchanger to the burner. valve and air compensator.
作为优选的技术方案，所述电动补氧阀连接空气过滤器。As a preferred technical solution, the electric oxygen supplement valve is connected to an air filter.
作为优选的技术方案，所述天然气管道沿着管道入口至烧嘴的方向依次设有手动切断阀、燃气过滤器、减压阀、燃气压力表、电磁阀、燃气比例阀、燃气限流阀及燃气补偿器，所述燃气比例阀连接所述助燃管道。As a preferred technical solution, the natural gas pipeline is provided with a manual shut-off valve, a gas filter, a pressure reducing valve, a gas pressure gauge, a solenoid valve, a gas proportional valve, a gas flow restrictor valve and A gas compensator, wherein the gas proportional valve is connected to the combustion-supporting pipeline.
作为优选的技术方案，所述烧嘴连接火焰探头及点火变压器。As a preferred technical solution, the burner is connected to a flame probe and an ignition transformer.
作为优选的技术方案，所述加热炉内的温度为1100摄氏度至1200摄氏度。As a preferred technical solution, the temperature in the heating furnace is 1100 degrees Celsius to 1200 degrees Celsius.
本发明的节能环保燃烧加热系统具有以下有益效果：The energy-saving and environment-friendly combustion heating system of the present invention has the following beneficial effects:
(1)废气排放是闭环控制，产品测试时产生的烟气被抽入烧嘴燃烧掉，无需或减少附属环保设备的需求。(1) The exhaust gas emission is closed-loop control, and the flue gas generated during product testing is drawn into the burner and burned, eliminating or reducing the need for auxiliary environmental protection equipment.
(2)增加了余热回收功能，更加节能。换热器的增加，可以使加热炉的高温气体与冷空气在换热器内形成热交换，把冷空气加热至较高温度的同时降低排放温度。通过余热回收，节能效果可以达到20％以上，大大减少了能力消耗。(2) Added waste heat recovery function, more energy saving. The addition of the heat exchanger can make the high temperature gas of the heating furnace and the cold air form heat exchange in the heat exchanger, and the cold air can be heated to a higher temperature while reducing the discharge temperature. Through waste heat recovery, the energy saving effect can reach more than 20%, which greatly reduces the energy consumption.
本发明与现有技术相比更加节能，使用燃料更少，排放温度更低，同时废气排放较以前有大幅度降低甚至达到0废气排放，实现无污染，环保节能的燃烧系统。本发明具有加热炉和焚烧炉双重功能，在燃烧加热的同时，可以把排放的烟气抽回进炉内当作烟气焚烧炉使用。Compared with the prior art, the present invention is more energy-saving, uses less fuel, and has a lower discharge temperature. At the same time, the exhaust gas emission is greatly reduced or even reaches zero exhaust gas emission compared with the previous one, thereby realizing a pollution-free, environment-friendly and energy-saving combustion system. The invention has the dual functions of a heating furnace and an incinerator, and at the same time of burning and heating, the exhausted flue gas can be drawn back into the furnace and used as a flue gas incinerator.
附图说明Description of drawings
下面结合附图与具体实施例对本发明作进一步详细说明。The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
图1为本发明节能建筑构件耐火实验炉环保燃烧加热系统的结构示意图。FIG. 1 is a schematic structural diagram of an environment-friendly combustion heating system for an energy-saving building component refractory experimental furnace according to the present invention.
其中，附图标记具体说明如下：手动切断阀1，燃气过滤器2，减压阀3，燃气压力表4，电磁阀5，燃气比例阀6，燃气限流阀7，燃气补偿器8，火焰探头9，点火变压器10，烧嘴11，空气补偿器12，空气限流阀13，空气调节阀14，风压开关15，空气压力表16，助燃风机17，烟罩18，加热炉19，排烟管道20，排气烟囱21，换热器22，电动补氧阀23，氧含量分析仪24、空气过滤器25、助燃管道26、天然气管道27。The reference numerals are specifically described as follows: manual cut-off valve 1, gas filter 2, pressure reducing valve 3, gas pressure gauge 4, solenoid valve 5, gas proportional valve 6, gas restrictor valve 7, gas compensator 8, flame Probe 9, ignition transformer 10, burner 11, air compensator 12, air restrictor valve 13, air regulating valve 14, air pressure switch 15, air pressure gauge 16, combustion fan 17, fume hood 18, heating furnace 19, exhaust Smoke pipeline 20 , exhaust chimney 21 , heat exchanger 22 , electric oxygen supplement valve 23 , oxygen content analyzer 24 , air filter 25 , combustion-supporting pipeline 26 , and natural gas pipeline 27 .
具体实施方式Detailed ways
如图1所示，一种建筑构件耐火实验炉节能环保燃烧加热系统，包括加热炉19、与加热炉19内部连通的烧嘴11、设置于加热炉19上方的烟罩18、连接加热炉19排烟口的排烟管道20、换热器22及排气烟囱21，换热器22的热源入口连接排烟管道20，热源出口连接排气烟囱21，冷源入口连接烟罩18，冷源出口通过助燃管道26连接烧嘴11，烧嘴11连接天然气管道27。烧嘴11连接火焰探头9及点火变压器10。加热炉19内的温度为1100摄氏度-1200摄氏度。As shown in FIG. 1 , an energy-saving and environment-friendly combustion heating system for a refractory experimental furnace for building components includes a heating furnace 19 , a burner 11 communicating with the interior of the heating furnace 19 , a smoke hood 18 arranged above the heating furnace 19 , and a connection to the heating furnace 19 . The exhaust pipe 20 of the exhaust port, the heat exchanger 22 and the exhaust chimney 21, the heat source inlet of the heat exchanger 22 is connected to the exhaust pipe 20, the heat source outlet is connected to the exhaust chimney 21, the cold source inlet is connected to the hood 18, and the cold source The outlet is connected to the burner 11 through the combustion-supporting pipeline 26 , and the burner 11 is connected to the natural gas pipeline 27 . The burner 11 is connected to the flame probe 9 and the ignition transformer 10 . The temperature in the heating furnace 19 is 1100 degrees Celsius to 1200 degrees Celsius.
助燃管道26沿换热器22至烧嘴11的方向依次设有电动补氧阀23、助燃风机17、氧含量分析仪24、空气压力表16、风压开关15、空气调节阀14、空气限流阀13及空气补偿器12。电动补氧阀23连接空气过滤器25。天然气管道27沿着管道入口至烧嘴11的方向依次设有手动切断阀1、燃气过滤器2、减压阀3、燃气压力表4、电磁阀5、燃气比例阀6、燃气限流阀7及燃气补偿器8，燃气比例阀6连接助燃管道26。The combustion-supporting pipeline 26 is sequentially provided with an electric oxygen supplement valve 23, a combustion-supporting fan 17, an oxygen content analyzer 24, an air pressure gauge 16, an air pressure switch 15, an air regulating valve 14, an air limit switch 15 along the direction from the heat exchanger 22 to the burner 11. Flow valve 13 and air compensator 12. The electric oxygen supplement valve 23 is connected to the air filter 25 . The natural gas pipeline 27 is sequentially provided with a manual shut-off valve 1, a gas filter 2, a pressure reducing valve 3, a gas pressure gauge 4, a solenoid valve 5, a gas proportional valve 6, and a gas flow restrictor valve 7 along the direction from the pipeline inlet to the burner 11. And the gas compensator 8, the gas proportional valve 6 is connected to the combustion-supporting pipeline 26.
工作过程：在烧嘴11点火之前，打开手动切断阀1，燃气通过燃气过滤器2，减压阀3达到需要的燃气压力，燃气压力可通过燃气压力表4观察，如果燃气压力正确，则打开助燃风机17，观察空气压力表16，如果达到压力标准，风压开关15信号正确，则具备点火条件，可以随时点火升温。当按下点火按钮时，点火变压器10产生高压电火花，同时电磁阀5和空气调节阀14打开，燃气和空气在烧嘴11内混合后遇电火花点燃，火焰探头9探测到火焰后，表明烧嘴11燃烧正常，这时实验正式开始，炉内开始升温，温度会随着时间很快升到国家标准(按照《GB/T9978.1-2008建筑构件耐火实验方法》建立，满足T＝345*lg(8t+1)+20的升温速度控制)要求的温度，最高可至1200度。伴随着炉内温度越来越高，被检测产品(如防火门等)开始冒烟，被检测产品在炉外冒出的大量烟气，烟气中通常含有烟尘、酸性物质、有机废气、卤素根等污染成分，这些烟气通过烟罩18收集后通过助燃风机17吸入助燃管道26，送入烧嘴11，烧嘴11的高温火焰可以把烟气高温分解，变成无污染高温气体排出，高温气体通过排烟管道20进入换热器22，热量被换热器22吸收，降至400度以下通过排气烟囱21排放，同时换热器22将来自烟罩18中的气体加热至400度以上进入烧嘴11，实现余热能量回收。如果氧含量分析仪24检测出助燃空气中氧浓度降低导致不能维持充分燃烧，则打开电动补氧阀23，自动补氧至正常氧含量水平。Working process: Before the burner 11 is ignited, open the manual shut-off valve 1, the gas passes through the gas filter 2, and the pressure reducing valve 3 reaches the required gas pressure. The gas pressure can be observed through the gas pressure gauge 4. If the gas pressure is correct, open The combustion-supporting fan 17, observe the air pressure gauge 16, if the pressure standard is reached and the signal of the air pressure switch 15 is correct, the ignition conditions are met, and the ignition can be heated at any time. When the ignition button is pressed, the ignition transformer 10 generates a high-voltage electric spark, and at the same time the solenoid valve 5 and the air regulating valve 14 are opened, and the gas and air are mixed in the burner 11 and ignited by the electric spark. After the flame probe 9 detects the flame, It indicates that the burner 11 burns normally. At this time, the experiment officially begins, the temperature in the furnace begins to heat up, and the temperature will soon rise to the national standard with time (established in accordance with the "GB/T9978.1-2008 Fire Resistance Test Method for Building Components", which satisfies T= 345*lg (8t+1)+20 heating rate control) the required temperature, up to 1200 degrees. As the temperature in the furnace is getting higher and higher, the tested products (such as fire doors, etc.) begin to emit smoke, and the tested products emit a large amount of smoke outside the furnace. The flue gas usually contains soot, acidic substances, organic waste gas, halogens Roots and other polluting components, the flue gas is collected by the fume hood 18 and then sucked into the combustion-supporting pipe 26 through the combustion-supporting fan 17, and sent to the burner 11. The high-temperature flame of the burner 11 can decompose the flue gas at high temperature and turn it into a non-polluting high-temperature gas to be discharged. The high-temperature gas enters the heat exchanger 22 through the exhaust pipe 20, and the heat is absorbed by the heat exchanger 22, and the heat is reduced to below 400 degrees and discharged through the exhaust chimney 21. At the same time, the heat exchanger 22 heats the gas from the hood 18 to 400 degrees The above enters the burner 11 to realize waste heat energy recovery. If the oxygen content analyzer 24 detects that the oxygen concentration in the combustion-supporting air is lowered, so that sufficient combustion cannot be maintained, the electric oxygen supplement valve 23 is opened to automatically supplement the oxygen to the normal oxygen content level.
以上应用了具体个例对本发明进行阐述，只是用于帮助理解本发明，并不用以限制本发明。对于本发明所属技术领域的技术人员，依据本发明的思想，还可以做出若干简单推演、变形或替换。The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention, and are not intended to limit the present invention. For those skilled in the art to which the present invention pertains, according to the idea of the present invention, several simple deductions, modifications or substitutions can also be made.
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