CN101871369B - Overheating turbine generating system for recovering sensible heat of converter gas - Google Patents

Overheating turbine generating system for recovering sensible heat of converter gas Download PDF

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CN101871369B
CN101871369B CN 201010188951 CN201010188951A CN101871369B CN 101871369 B CN101871369 B CN 101871369B CN 201010188951 CN201010188951 CN 201010188951 CN 201010188951 A CN201010188951 A CN 201010188951A CN 101871369 B CN101871369 B CN 101871369B
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sensible
turbine
gas
generating
converter
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CN 201010188951
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CN101871369A (en )
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赵斌
李建新
王子兵
武志飞
张尉然
赵伟月
闫晨帅
周广沙
周子淇
王奇
常金宝
于立新
杨晓江
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河北理工大学
唐山钢铁集团有限责任公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/54Metal recycling

Abstract

本发明涉及转炉煤气余热利用技术,特别是一种回收转炉煤气显热的过热汽轮机发电系统。 The present invention relates to superheat the steam turbine power generation system of converter gas waste heat utilization technology, particularly to a converter gas recovery of sensible heat. 包括炼钢转炉、汽化冷却烟道、耐高温除尘器、余热锅炉、精除尘器、汽包、汽轮机、发电机,所述炼钢转炉产生的1600℃的转炉煤气依次通过所述汽化冷却烟道、扩散式旋风除尘器和余热锅炉,降温至200℃以下后进入精除尘器,该精除尘器后部连接有煤气回收排放装置;所述汽化冷却烟道中布置的过热器将汽包分离出来的饱和蒸汽转化成温度为350-400℃、压力为1.5-2.5MPa的过热蒸汽,并以主蒸汽的形式进入多进口过热汽轮机,驱动汽轮机组发电。 Comprising a steel converter, evaporative cooling flue dust temperature, waste heat boiler, the fine dust, steam drum, steam turbine, generator, the converter gas generated 1600 ℃ a converter by sequentially cooling the flue vaporizing , diffusion cyclone waste heat boiler and, after cooling to below 200 ℃ into the fine dust, fine dust collector is connected to the rear of the exhaust gas recovery apparatus; evaporative cooling of the superheater flue arrangement of the separating drum saturated steam to a temperature of 350-400 deg.] C, a pressure of 1.5-2.5MPa superheated steam and superheated steam turbine into the inlet in the form of a multi-primary steam driven turbine generator set. 本发明通过三套转炉余热回收系统的配合推进多进口汽轮机持续工作,使发电系统得以安全稳定的运行。 The present invention continue to work to promote more imports by the steam turbine with three sets of converter waste heat recovery system, the power generation system to ensure the safe and stable operation.

Description

回收转炉煤气显热的过热汽轮机发电系统 Converter gas sensible heat recovery superheated steam turbine power generation system

技术领域 FIELD

[0001] 本发明涉及转炉煤气余热回收利用技术,特别是一种回收转炉煤气显热的过热汽轮机发电系统。 [0001] The present invention relates to a converter gas heat recovery technology, and particularly to a converter gas sensible heat recovery superheated steam turbine power generation system.

背景技术 Background technique

[0002] 转炉煤气作为转炉炼钢的副产品,其中除了含有大量CO可供燃烧外,1600°C左右的高温显热也极具利用价值。 [0002] Converter steelmaking gas as a byproduct, which in addition contains a large amount of CO for combustion, the sensible heat of a high temperature of about 1600 ° C is also of great value in use. 目前,国内外普遍应用的转炉煤气除尘回收技术主要有两种:即OG法和LT法,但两种方法都未对900°C以下的转炉煤气显热进行回收。 Currently, converter gas dust recovery technology is widely used at home and abroad, there are two major: OG i.e., the LT and method, but neither of the two methods converter gas sensible heat below 900 ° C is recovered. 现行的OG法运行时产生大量污水难于处理,由此引起的环境问题亟待解决,而LT法也需要向高温煤气中喷射蒸汽来降低温度,且LT法由于设备投资大及关键技术须从国外引进等原因短时间内难以在国内普及。 The current method produces OG runtime difficult to handle large amounts of sewage, environmental problems resulting solved, while LT law also requires the injection of steam into the high-temperature gas to lower the temperature, and the LT method because of the large investment in equipment and key technologies to be introduced from abroad reasons such a short time is difficult to spread in the country. 申请号为200910085785.6的中国专利申请,公开了一种炼钢转炉煤气净化及余热回收利用系统,该系统将转炉煤气余热转变为饱和蒸汽并用于制冷。 Chinese Patent Application No. 200910085785.6, there is disclosed a converter gas purification and heat recovery system waste heat into the converter gas and the saturated steam used for refrigeration. 但钢铁企业冷量用户分布较分散,不便采用集中空调,且只能生产饱和蒸汽。 But cold steel companies users more dispersed distribution, centralized air-conditioning inconvenience, and can only produce saturated steam. 申请号为200910103798.1的中国专利申请,公开了一种转炉煤气汽化冷却烟道,该汽化冷却烟道尾部加装了双筒旋风除尘器,用于粗除尘,但转炉煤气除尘回收系统都是由后部引风机提供抽力,该技术采用的旋风除尘器采用上部排气不适用于该抽风工况,除尘效果不佳。 Chinese Patent Application No. 200910103798.1, there is disclosed a converter gas flue evaporative cooling, evaporative cooling of the flue tail binocular fitted with a cyclone for coarse dust, but the converter gas recovery system is made after dedusting providing suction force draft fan section, the cyclone technique employed using the upper portion of the exhaust gas does not apply to poor ventilation conditions, the effect of dust.

[0003]当前,回收利用转炉煤气余热的发电技术已有应用,但由于转炉操作的间断性和特定的冶炼周期,需要配置蓄热器才可实现汽轮发电机组的不间断供汽,并且国内转炉煤气显热回收主要以生产低压饱和蒸汽为主,但现行饱和汽轮机内效率低,造成转炉余热利用率低。 [0003] Currently, the converter gas recovery and utilization of waste heat power generation technology has been applied, but the intermittent period of the converter and the specific smelting operation, needs to be configured before the regenerator for uninterrupted steam turbogenerator, domestic and converter gas sensible heat recovery mainly to produce a low pressure saturated steam-based, but the low efficiency of the existing steam turbine in the saturation, resulting in low utilization of waste heat converter. 而有效回收900°C以下转炉煤气显热并可以生产过热蒸汽用于发电的系统尚未有文献报道。 While less efficient recovery of 900 ° C and the converter gas sensible heat of the superheated steam may be produced for power generation system has not been reported in the literature.

发明内容 SUMMARY

[0004] 本发明所要解决的问题是提供一种回收转炉煤气显热的过热汽轮机发电系统,该系统可以高效回收转炉煤气余热并能生产过热蒸汽用于多进口汽轮机变工况发电。 [0004] The present invention is to provide a problem to be solved superheated steam turbine power generation system for recovering the sensible heat of the gas converter, the converter gas recovery system, heat can be efficiently and can produce superheated steam turbine inlet for multiple variable power conditions.

[0005] 本发明所称问题是由以下技术方案解决的:一种回收转炉煤气显热的过热汽轮机发电系统,包括炼钢转炉、汽化冷却烟道、耐高温除尘器、余热锅炉、精除尘器、汽包、汽轮机、发电机和相应的连接管路,所述耐高温除尘器为扩散式旋风除尘器,其内壁上加装有螺旋管圈式水冷却壁;所述余热锅炉其上部受热面装有螺旋管圈式水冷壁,其下部受热面装有错列鳍片管省煤器;所述汽轮机为多进口过热汽轮机,其第一级喷嘴沿圆周布置且分成多组,每一组分别对应一个自动主汽阀;所述汽化冷却烟道、扩散式旋风除尘器和余热锅炉分别设置给水分支管路和与汽包连通的湿蒸汽管路;所述炼钢转炉产生的1600°C左右的转炉煤气依次通过所述汽化冷却烟道、扩散式旋风除尘器和余热锅炉,降温至200°C以下后进入精除尘器,该精除尘器后部连接有煤气回收 [0005] The present invention solves the problems referred to by the following technical solutions: one converter gas sensible heat recovery superheated steam turbine power generation system, comprising a steel converter, evaporative cooling flue dust temperature, waste heat boiler, the fine dust , drum, turbines, generators, and the corresponding connection line, said high temperature cyclone dust collector diffusion, which installation has a water-cooled type spiral ring on the interior wall; its upper heating surface of the waste heat boiler spiral formula with water wall, its lower surface with a staggered fin heat pipe economizer; a plurality of turbine inlet superheat steam turbine, a first stage nozzle and arranged circumferentially divided into a plurality of groups, each group respectively, It corresponds to a main steam valve automatically; about the generated steelmaking converter 1600 ° C; the evaporative cooling flue diffusion cyclone and waste heat boiler feedwater branch line are provided and the wet steam conduit communicating with the drum converter gas passes through the evaporative cooling flue diffusion cyclone waste heat boiler and, after cooling to below 200 ° C into the fine dust, fine dust collector is connected to the rear of the gas recovery 放装置;所述汽化冷却烟道中布置的过热器将汽包分离出来的饱和蒸汽转化成温度为350-400°C、压力为1.5-2.5MPa的过热蒸汽,并以主蒸汽的形式进入多进口过热汽轮机,驱动汽轮机组发电。 Discharge means; the evaporative cooling of the superheater flue arrangement the drum separated saturated steam to a temperature of 350-400 ° C, a pressure of the superheated steam 1.5-2.5MPa, and imports into the form of a plurality of main steam superheated steam turbine, steam turbine driven generating set. [0006] 与现有技术相比,本发明通过利用耐高温旋风除尘器将高温转炉煤气中的火种予以捕集并去除,为余热锅炉进行显热回收提供了安全保障;本发明通过合理布置受热面,使转炉煤气的显热得以最大限度的回收利用,并通过三套及以上转炉余热回收系统的配合驱动多进口汽轮机和发电机持续的工作,确保发电系统安全稳定运行。 [0006] Compared with the prior art, the present invention is by using high temperature cyclone converter gas will be trapped in a high temperature fire and removed to provide security to the sensible heat heat recovery boiler; rational arrangement of the present invention by heating surface, the sensible heat of the converter gas to maximize recycling, and drive continued work by more imports of turbines and generators with three or more converter waste heat recovery system, to ensure the safe and stable operation of power system. 由于转炉余热回收的蒸汽量少,配套的汽轮机组属小型机组,它的变负荷发电对电网的稳定运行基本没有影响。 Since the converter waste heat recovery steam less, supporting the steam turbine units are small, its variable load power generation had no effect on the stable operation of the grid.

附图说明 BRIEF DESCRIPTION

[0007] 图1为本发明所述扩散式旋风除尘器结构示意图。 [0007] FIG. 1 is a schematic structure of the cyclone-type diffusion of the present invention.

[0008] 图2为本发明所述余热锅炉受热面布置图。 [0008] FIG 2 the heat recovery boiler heating surface arrangement of the present invention FIG.

[0009] 图3为本发明所述多进口过热汽轮机的第一级喷嘴布置图。 [0009] FIG. 3 of the first multi-stage nozzle inlet arrangement of Figure superheated steam turbine of the present invention.

[0010] 图4为图3的侧剖图。 [0010] FIG. 4 is a side cross-sectional view of FIG. 3.

[0011] 图5为本发明系统结构示意图。 [0011] FIG. 5 is a schematic system configuration of the present invention.

[0012] 图中:湿蒸汽管路I ;螺旋管圈式水冷壁2 ;给水分支管路3 ;转炉煤气出口4 ;省煤器5 ;转炉煤气进口6 ;喷嘴组7 ;自动主汽阀8 ;逆止阀9 ;主蒸汽管路10 ;汽化冷却烟道11 ;扩散式旋风除尘器12 ;余热锅炉13 ;饱和蒸汽管路14 ;汽包15 ;多进口过热汽轮机16 ;发电机17 ;其它转炉余热回收系统主蒸汽管路18 ;冷凝器19 ;凝结水泵20 ;除氧器21 ;总给水管路22 ;给水泵23 ;煤气柜24 ;放散烟® 25 ;V型水封26 ;三通阀27 ;引风机28 ;精除尘器29 ;炼钢转炉30。 [0012] FIG: wet steam conduit I; Spiral Wall Formula 2; water supply branch pipe 3; converter gas outlet 4; 5 economizer; converter gas inlet 6; 7 nozzle groups; automatic main steam valve 8 ; 9 check valve; a main steam pipe 10; evaporative cooling tunnel 11; 12 cyclone diffusion; waste heat boiler 13; saturated steam line 14; drum 15; import more superheated steam turbine 16; generator 17; other converter waste heat recovery system of the main steam line 18; a condenser 19; 20 condensate pump; deaerator 21; total water supply conduit 22; feed pump 23; gas tank 24; smoke emission ® 25; V-type seal 26; tee valve 27; induced draft fan 28; 29 fine dust; steel converter 30.

具体实施方式 detailed description

[0013] 以下结合附图及实施例详述本发明。 [0013] The following example details and embodiments of the present invention in conjunction with the accompanying drawings.

[0014] 本实施例以3X 120t转炉为例说明,与炼钢转炉30配套的汽化冷却烟道11结构形式与现行设备类似,只是中上部采用了辐射式过热器,烟罩部位采用微正压运行。 [0014] In this embodiment, an example 3X 120t converter, the converter 30 and the steel supporting structure evaporative cooling of the flue 11 with the existing similar apparatus, using only the upper radiant superheater, using a slight positive pressure hood parts run.

[0015] 参看图5,本发明由炼钢转炉30、汽化冷却烟道11、扩散式旋风除尘器12、余热锅炉13、精除尘器29、汽包15、多进口过热汽轮机16、发电机17等和相应的连接管路以及煤气回收排放装置构成。 [0015] Referring to Figure 5, the present invention is a steel converter 30, flue 11 evaporative cooling, diffusion Cyclone 12, 13 waste heat boiler, the fine dust collector 29, the steam drum 15, a multi-inlet superheated steam turbine 16, a generator 17 and the like as well as the respective connecting lines discharge gas recovery apparatus.

[0016] 仍参看图5,从所述炼钢转炉30炉口收集的1600°C左右高温转炉煤气首先进入所述汽化冷却烟道11,被冷却至900°c,然后进入所述扩散式旋风除尘器12,通过离心力作用去除高温转炉煤气中的大颗粒(火种),并进一步进行辐射-对流换热;此后经初步净化的转炉煤气进入所述余热锅炉13,在所述余热锅炉13中进行辐射-对流换热降温至200°C以下;最后低温转炉煤气进入到所述精除尘器29中,使转炉煤气含尘量达到排放要求,彻底净化后的转炉煤气经管道送入煤气回收排放装置。 [0016] Still referring to FIG. 5, the left and right collected from the furnace opening 30 of converter steel temperature 1600 ° C converter gas first enters the evaporative cooling tunnel 11, it is cooled to 900 ° c, and then enters the diffuser cyclone precipitator 12 is removed by centrifugal force in the high-temperature gas furnace large particles (fire), and further radiation - convection heat; into the waste heat boiler 13 after preliminary purification converter gas, is performed in the waste heat boiler 13 radiation - convection heat transfer to cool to below 200 ° C; final cryogenic gas into said converter in the fine dust collector 29, so that the converter gas dust emission requirements reached, after thorough cleaning of converter gas is fed via conduit means exhaust gas recovery .

[0017] 本实施例所述煤气回收排放装置由引风机28、三通阀27、V型水封26、放散烟囱25、煤气柜24组成,所述引风机28连接精除尘器29,其后部的煤气输送管道上依次设有三通阀27、V型水封26和煤气柜24,该三通阀27的放散侧连接放散烟® 25。 [0017] This embodiment of the exhaust gas recovery apparatus by the induced draft fan 28, the three-way valve 27, V-type water seal 26, 25 diffuse the chimney, composition of gas tank 24, the induced draft fan 28 connected to the fine filter 29, and thereafter on the gas pipeline section sequentially provided three-way valve 27, V-type water seal 26 and the gas tank 24, the relief side of the three-way valve 27 is connected to the smoke emission ® 25. 所述三通阀27以转炉煤气中的CO和微O含量作为设定值,不合格的转炉煤气被切换至放散侧经放散烟囱25燃烧放散,合格转炉煤气被切换至回收侧通过V型水封26送往煤气柜24储存。 The three-way valve 27 to CO and O content of the micro gas in the converter as a setting value, the failed converter gas emission side is switched to the chimney 25 through the diffusing combustion emission, passing the converter gas is switched to a V-type water recovery side by sealing the gas tank 26 sent to storage 24.

[0018] 参看图1,给水经给水分支管路3进入扩散式旋风除尘器12的螺旋管圈式水冷壁2吸收转炉煤气的辐射热转变为湿蒸汽经由湿蒸汽管路I排出。 [0018] Referring to Figure 1, the water supply by the water supply branch pipe 3 into the cyclone-type diffusion SPIRAL Formula 2 waterwall 12 the converter gas absorbing radiation heat into the wet steam is discharged through the wet steam conduit I. [0019] 参看图2、图5,给水经给水分支管路3首先进入余热锅炉13内部下面的省煤器5进行对流换热后再进入余热锅炉13内部上面的螺旋管圈式水冷壁2加热至湿饱和蒸汽后送至汽包15进行汽水分离。 [0019] Referring to FIG. 2, FIG. 5, the water supply by the water supply branch pipe 3 first enters the waste heat boiler economizer 13 5 The following internal convective heat transfer into the interior of the waste heat boiler 13 after the above second heating spiral water wall ring of formula after the wet saturated steam supplied to the drum 15 for water separation.

[0020] 参看图5,所述汽化冷却烟道11、扩散式旋风除尘器12和余热锅炉13三种设备产生的蒸汽一同经湿蒸汽管路I进入汽包15,从汽包15分离出来的凝结水送返至除氧器21,从汽包15分离出来的饱和蒸汽经过饱和蒸汽管路14进入汽化冷却烟道11中上部的过热器升温为过热蒸汽后经过主蒸汽管路10、逆止阀9、自动主汽阀8和喷嘴组7后进入多进口过热汽轮机16,驱动发电机17发电。 [0020] Referring to Figure 5, the evaporative cooling tunnel 11, the vapor diffusion cyclone 12 and waste heat boiler 13 via the three devices together produce wet steam line I into the drum 15, the drum 15 is separated from the condensate sent back to the deaerator 21, the saturated steam from the steam drum 15 separated from the saturated steam through the conduit 14 into the upper portion of the evaporative cooling superheater heating flue 11 to the superheated steam through the main steam pipe 10, the check valve 9, an automatic main steam valve 8 and the nozzle 7 into a multi-set after superheater inlet turbine 16, drives the generator 17 to generate electricity.

[0021] 仍参看图5,其它转炉余热回收系统主蒸汽管路18进入所述多进口过热汽轮机16,这样多套系统错开间歇期运行,从而确保汽轮机有连续稳定的蒸汽供应。 [0021] Still referring to Figure 5, another converter waste heat recovery system of the main steam line 18 into the inlet of said plurality superheat steam turbine 16, so that multiple systems of intermittent shifting operation, thereby ensuring a stable continuous turbine steam supply.

[0022] 仍参看图5,多进口过热汽轮机16中排出的乏汽通入冷凝器19,产生的冷凝水和外部补充水经凝结水泵20进入除氧器21,除氧器21的给水通过给水泵23进入总给水管路22,分别为各套转炉余热回收系统中的汽化冷却烟道11、扩散式旋风除尘器12和余热锅炉13各支路供水。 [0022] Still referring to Figure 5, a multi-inlet superheated steam turbine exhaust in the exhaust steam 16 into the condenser 19, and condensate water generated outside supplement 21, condensate pump 20 through the water supply water into the deaerator 21 through a deaerator total feed line 23 enters pump 22, respectively, each of the evaporative cooling jacket flue converter waste heat recovery system 11, cyclone 12 and diffusion 13 of each branch supply waste heat boiler.

Claims (1)

  1. 1.一种回收转炉煤气显热的过热汽轮机发电系统,包括炼钢转炉、汽化冷却烟道、耐高温除尘器、余热锅炉、精除尘器、汽包、汽轮机、发电机和相应的连接管路,其特征在于,所述耐高温除尘器为扩散式旋风除尘器,其内壁上加装有螺旋管圈式水冷却壁;所述余热锅炉其上部受热面装有螺旋管圈式水冷壁,其下部受热面装有错列鳍片管省煤器;所述汽轮机为多进口过热汽轮机,其第一级喷嘴沿圆周布置且分成多组,每一组分别对应一个自动主气阀;所述汽化冷却烟道、扩散式旋风除尘器和余热锅炉分别设置给水分支管路和与汽包连通的湿蒸汽管路;所述炼钢转炉产生的1600°c左右的转炉煤气依次通过所述汽化冷却烟道、扩散式旋风除尘器和余热锅炉,降温至200°C以下后进入精除尘器,该精除尘器后部连接有煤气回收排放装置;所述汽化冷却烟道中 1. A method for recovering the sensible heat of superheated converter gas turbine power generation system, comprising a steel converter, evaporative cooling flue dust temperature, waste heat boiler, the fine dust, steam drum, steam turbines, generators, and corresponding connecting lines characterized in that said high temperature cyclone dust collector diffusion, which installation has a water-cooled type spiral ring on the interior wall; the waste heat boiler with its upper heating surface ring type spiral water wall a lower heating surface with staggered fin tubes economizer; a plurality of turbine inlet superheat steam turbine, a first stage nozzle and arranged circumferentially divided into a plurality of groups, each group respectively corresponding to a main automatic valve; said vaporizing cooled flue gas, and diffusion cyclone HRSG feedwater branch line are provided and the wet steam drum communicating with the conduit; about the generated steelmaking converter 1600 ° c converter gas passes through the evaporative cooling smoke Road, diffusion cyclone and waste heat boiler, cooling to 200 ° C after entering the fine dust, fine dust collector is connected to the rear of the exhaust gas recovery apparatus; evaporative cooling of the flue 置的过热器将汽包分离出来的饱和蒸汽转化成温度为350-400°C、压力为1.5-2.5Mpa的过热蒸汽,并以主蒸汽的形式进入多进口过热汽轮机,驱动汽轮机组发电;所述煤气回收排放装置由引风机、三通阀、V型水封、放散烟®、煤气柜组成,所述引风机连接精除尘器,其后部的煤气输送管道上依次设有三通阀、V型水封和煤气柜,该三通阀的放散侧连接放散烟囱。 Superheater drum opposite the separated saturated steam to a temperature of 350-400 ° C, a pressure of the superheated steam 1.5-2.5Mpa, and many imported into the superheated main steam turbine in the form of drive steam turbine generator set; the said exhaust gas recovery apparatus by the fan, the three-way valve, V-seal, ® smoke emission, gas cabinets, the induced draft fan connected to the fine dust, three-way valve are sequentially provided on the rear portion of gas pipeline, V and seal type gas tank, emission side of the three-way valve connected to a chimney emission.
CN 201010188951 2010-05-28 2010-05-28 Overheating turbine generating system for recovering sensible heat of converter gas CN101871369B (en)

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CN102776326B (en) * 2012-07-17 2013-12-04 无锡三达环保科技有限公司 Dust removal and two-medium waste heat generation system for argon oxygen decarburization converter

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Free format text: CORRECT: INVENTOR; FROM: ZHAO BIN WANG ZIBING WU ZHIFEI ZHANG WEIRAN ZHAO WEIYUE YAN CHENSHUAI ZHOUGUANGSHA ZHOU ZIQI WANG QI TO: ZHAO BIN LI JIANXIN WANG ZIBING WU ZHIFEI ZHANG WEIRAN ZHAO WEIYUE YAN CHENSHUAI ZHOU GUANGSHA ZHOU ZIQI WANG QI CHANG JINBAO YU LIXIN YANG XIAOJIANG

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