Shanghai Daoqin Plastics Co., Ltd.

         core 提示: and 100kg煤 powder ￡a每天漏16000t矿石 production 出blish32!风口喷吹 plastics in issues 1 front waste plastics already formed is world property difficult 题, from can 源, decrease/reduce 污染 角 degree 考虑, 各国都 in research recycling utilizing methods.

        焦炭 and 100kg煤 powder ￡a每天漏16000t矿石 production 出blish32!风口喷吹 plastics in issues 1 front waste plastics already formed is world property difficult 题, from can 源, decrease/reduce 污染 角 degree 考虑, 各国都 in research recycling utilizing methods. especially is industrial 发达国家, is 此投入 versus 当资金 research development waste plastics recycling utilizing technology. in this 方面, 曰本钢 tube/pipe made iron a large amount of research, development toward high 炉喷吹粒状 plastics technology. 自1996 year 开始喷吹, to 1999 year amount already 达4.5万t.焦炭 use amount year decrease/reduce 5万t, carbon acid gas 体 排放 amount year decrease/reduce 20. 2万t, to good 经济效益 and 社会效益. due to technology in energy saving and environmental protection di heavy 效果而受 to 2000 year degree Japan full energy saving promote 会 奖励.

         in high as process in, from 矿石变 formed iron water need consumption a large amount of 焦炭. is 说, from high upper 部装入, meanwhile from high lower 部风口喷入原生煤炭 powder 末, 即喷煤. in improve/increase ratio meanwhile, various waste plastics in increase, but also recycling utilizing rate very low. plastics tool has 41868kJ/kg hot value, and versus ratio, hydrogen has rate relatively high. therefore toward high 炉喷吹 plastics, not only can decrease use amount, but also also can decrease/reduce CO2 排放 amount. will waste plastics used for iron, 既节省资源 also ring 境, is di good methods. currently this methods in outer already 经投入实 use, in inner also 仅限于 discussion and research stage/phase.

        2 for current situation analysis 2.1 high as current situation and from high upper 部交替装 upper inner meanwhile, from lower 面风口鼓入1000°C above hot 风, iron water and meanwhile 流出. in high lower 部风口端头 回旋区, 焦炭经燃烧生 formed high temperature gas to also and understanding. this large separation 焦炭变 formed ⑴ gas and iron 矿石进行 also reaction.

         is reduce use amount, technology already to and.

        以京浜 made iron 1号 high is 例, 每吨生 iron use 450kg 10000t生 iron. made iron iron amount ultra- 20Ckg.没 has and also reaction gas from 炉顶排出, used for 炉顶余 pressure electrical or to inner add hot and electrical machine as is material use, make gas to full has utilizing.

        2.2 waste plastics recycling utilizing plastics from various large small packaging bag, tool to automotive decrease device and other large type molding product already to type active 各 方面, day heavy. due to use scope/range and use amount expand large, waste amount in year increase. its methods remove a small amount of recycling outer, is 填埋, is 焚烧. not only use 土, but also difficult degradation understanding also formed ring 境污染. 各国政府都 in 提倡资源 recycled or recycling utilizing made series policy regulations control for 国土资源 and ring 境 破 bad. Japan is can small 国, separation heavy for waste material recycling utilizing, many energy saving technology in world front 列, for plastics recycling utilizing rate has 42%(1997 year), this large is is plastics complex, has plastics products is and other material mixed combined material, difficult separation 离 缘故.

        3 high use plastics in issues 3.1 waste plastics utilizing methods plastics as is hot 源装入炉 inner has types methods: (1)自 high upper 部装入;(2)自 high lower 部风口吹入. about/regarding high inner temperature degree distribution, lower large 约2000 in upper 部, due to lower generate high temperature gas and 原, material (iron 矿石, 焦炭)进行 hot 交换而 reduce to 约150°C. if plastics from high upper 部随矿石, 焦炭一起装入炉 inner, 就会随 raw materials decline rise temperature. plastics belongs to chemical industry product, temperature degree to 100~200C时就会熔化, to 300C above 时就会 separation understanding formed low molecular weight combined material. in separation understanding formed material in, has wax and formed separation, therefore from upper 部装入会 effect/influence material gas property, but also also viscous in gas equipment upper formed fault/failure, can from upper 部装入不 is methods. upper 述情况 heavy research 自风口喷吹 methods ……0―. and 0mmn below/following plastics pellets in 回旋区 inner gas 1油化 from 风口喷吹 solid material 如 示, in high lower 部燃烧, gas 化区(回旋区)变换 formed also gas 体. from hot toward 风口鼓入 hot temperature degree 约1000°q speed degree 约200m/S, due to impact force, in 风口处形 formed 一 约1. 5m long to hot in 2便急剧燃烧并瞬间生 formed CO2 and H2O, and meanwhile, temperature degree to 2000°C above. 回旋区 rear semi separation (远离风口部 separation), 2消失, formed C2 and HO and reaction formed also gas 体CO and H2. most formed gas formed and temperature degree distribution. solid material in 回旋区 inner time its short 暂, 约10 improve/increase solid material in high inner utilizing rate, must development make solid material most short time 燃烧/ gas technology. in 喷吹煤 powder lower, 粒径不 ultra- 100%!.

        回旋区 inner gas formed and temperature degree distribution waste plastics degree requirements and powder 一样. for plastics powder processing process in generate hot, processing generate hot 会导致 plastics soft 熔, is anti soft must cooling technology this need a large amount of can 源. another, waste plastics 形态各异, make powder processing system complex 化. is 此, for below/following 2 issues research.

         plastics in high inner to most high utilizing rate most 佳粒径.

        实际喷吹时 for high as effect/influence.

        4 solution methods 4.1 plastics and 燃烧/ gas features in generally 焚烧炉 in, solid pellets 燃烧/ gas features 受粒径 large small effect/influence, 粒径越 large, 燃烧/ gas rate low. large small is processing machine 械决定, therefore, for processing machine design important. from 模拟. is comparison, meanwhile table/sheet 示出 喷焦 and 喷煤 情况. in 喷煤 情况 lower, powder 一进入回旋区, oxygen gas speed by consumption, 风口端头部 oxygen gas full consumption light. in 喷焦情况 lower, oxygen gas consumption decrease trend 并出现CO2 high 峰期, can 见, 回旋区 inner in belt/tape.

         from can 看出, plastics and 喷焦情况 similar.

        经 for is 0.2~1.0mm and 粒径<10mm plastics versus ratio, CO2 峰 value 位置虽靠近风口, 但不像煤 powder that 样贴近. 喷吹焦 powder 时, most high temperature degree 距风口约250mm;喷煤 情况 has different, most high temperature degree and relatively 近. 喷吹粒径<10mm plastics, its temperature degree distribution and 喷焦情况 similar. and versus ratio, due to high temperature 区离风口稍远, therefore can decrease light for hot negative 荷, meanwhile can decrease light 炉壁引起 hot loss 失.

         about/regarding plastics gas rate and 粒径 关系, experiment/testing table/sheet 明, 粒径越 large, gas rate high. but also ratio powder gas rate high, powder gas rate is 56%~60%, plastics gas rate high 达90% above. coarse plastics therefore gas rate high, analysis causes is 吹入风口 rear due to pellets relatively large 并不立即 火燃烧, is in 回旋区 inner as short ring 滞留, 当粒径达 to dispersion degree (极限粒径)时 again gas speed degree versus for 应. 回旋区 inner gas rate can use lower table/sheet 示.

        由此 can 看出, 初始粒径r large coarse plastics can ensure high 燃烧/ gas rate. using/adopting upper 式进行 计算结果 and 实测结果 basic 一致, this 说明实验 use type is 适当. powder 燃烧/ gas rate low causes is in 回旋区 inner as ring 滞留. make coarse powder can to ring 滞留 效果, is 煤粒受 to add hot rear separation 裂, method control its property. plastics 组织致密, hot slow, to add hot easy separation 裂. is 说, need degree 当, can waste plastics as is also agent and hot use.

        4.2 in high 炉喷吹 plastics 实验经反复 analysis research and experiment/testing rear, in made iron high 炉进行 实炉实验. plastics degree separation is 2 types, types is is 0.2~1.0mm, types 粒径<10mm, main/primary project lower.

         high inner gas analysis: in high semi direction upper 3 取样点放置探测 device for plastics high gas 进行采样.

         for high powder in 焦油进行 analysis.

        经 for high semi direction upper in 心, in 间, 周边部煤 gas in H2 content analysis 知, plastics 时, 无论粒 degree how to, and plastics versus ratio, H2 content has increase. especially is 喷吹0. ~1.0mm plastics, and in versus ratio, in and H2 content need high. 而喷吹粒径< 10mm 塑粒时, in and in H2 content need high. this is 说, 喷吹< 10mm coarse plastics 时, in 回旋区 inner deep ring 滞留, formed also gas has 效 渗透 to high internal.

         about/regarding high inner issues, 实验结果 table/sheet 明, and plastics high powder in content same, this remove 原 担心. can 见, plastics is in issues, high gas in H2 content increase, high carbon acid gas 体 排放 amount will decrease/reduce.

        4.3模拟计算效果经喷煤 and plastics versus ratio, plastics 时焦炭 消 consumption amount ratio less, this is is plastics hot amount ratio powder high 缘故. can 计算出, plastics amount is 10kg/t iron 7 water use amount can decrease 12.1kg/t iron water.

         rate to 理想 效果. plastics in high inner formed also gas, used for iron also 原. use amount is high hot balanced and material balanced 决定. research table/sheet 明, plastics amount is 50kg/t iron water 时, also gas utilizing rate is 51%说明 plastics as is also agent to has utilizing. by utilizing to outer gas also used for hot and electrical. plastics 时, as is high overall system hot recycling utilizing rate can 达80% this ratio used for waste electrical hot recycling efficiency high more.

        5喷吹 plastics obtain 经济效益5.1喷吹 plastics and 炉况喷入 high plastics must tool has 一定 粒 degree, 1996 year 10 month Japan 京浜1号 high use plastics is remove polyethylene (PE) outer industrial waste plastics, separation film and block 状2 types, separation in 2 system 进行处理. film plastics in pelletizing machine pelletizing, block plastics in powder machine powder 碎, must processing formed setting degree. year can force 4万 more t.结果 table/sheet 明, 设置喷塑 system rear, ratio decline, stability.

        5.2 energy saving table/sheet 1喷吹 plastics can 源. comparison mono 位(未喷塑)(喷塑) increase decrease amount 焦炉装煤 amount kg/t iron water 喷塑: 一24.7 increase dry hot amount MJ/t iron water high 焦炭kg/t iron water increase amount: 一13.8炉煤 powder kg/t iron water plastics kg/t iron water plastics hot amount: 35588kJ/kg; powder hot amount: 30982k|/kg toward high 炉喷吹 waste plastics energy saving main/primary performance in reduce ratio 方面. table/sheet 1 table/sheet 示包括焦炉 in inner can 源, 节省资源 效果. and plastics reduce ratio, meanwhile reduce 炼焦时 consumption amount. from 各自 喷吹 amount and hot amount can 计算出喷吹 plastics 效果. 1999 year plastics 4.5万t, versus 当于每吨 iron water 13. 3kg.依此计算, 焦炭削 decrease amount is 14.3kg, ― year decrease amount is 5.0万t.按焦炭平均发 hot amount 29726kJ/kg计算 year energy saving amount is 1.475X106GJ. from table/sheet 1 can 看出, due to plastics ratio reduce, 焦炉炼焦 less use 煤24.7kg/t iron water, year can decrease/reduce use amount 8.5万t(出 iron amount 9500t/d) another, due to less use 煤1喷吹 plastics as process in recycling dry hot amount consumption amount can decrease/reduce 339MJ/: t// iron water 孟, 1 energy saving year energy saving 46473GJ.焦炉, high combined year energy saving is 1.521X106GJ, versus 当于京浜 made iron full year can consumption amount 1.47 5.3 decrease/reduce carbon acid gas 体 排放 amount upper 如述, due to plastics decrease/reduce use amount, decrease/reduce carbon acid gas 体 排放 amount. upper 述焦炭 year decrease amount 5万t计算, year can decrease/reduce carbon acid gas 体15. 8万t(按0.8686kg―akg―焦换算). 另夕卜, due to plastics hydrogen content ratio powder high, therefore plastics also 会进一步 decrease/reduce carbon acid gas 体 排放 amount. increase amount and plastics belt/tape C amount decrease/reduce, can from 各自 含C rate 算出. due to plastics C decrease/reduce amount is 3.5kg/t iron water, year can decrease/reduce carbon acid gas 体排放 amount 4.4万t(换算 formed C is 1.2万t)两项 combined year can decrease/reduce carbon acid gas 体排放 amount 20.2万t. 6结束语曰本 development 并投入实 use technology 不但取 良 good 经济效益, but also is waste plastics 处理开辟 一 strip/profile new 途径. currently already in 京浜, 福山, add and other more iron enterprise 投入实 use in 不断 推广. from recycling and ring 境 角 degree 看, waste plastics is good methods. 曰本钢 iron 协会针 for 球变暖 issues, plan in 2010 year high 炉喷吹 plastics 达100万t, can consumption amount and carbon acid gas 体排放 amount and 1990 year versus ratio reduce 1.5% above introduction Japan made iron 1号 high using/adopting technology in energy saving and environmental protection 方面取 excellent formed 绩, if for 我国炼 iron industry has 借鉴则不胜欣慰.