制浆工艺流程
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废纸回收制浆造纸工艺流程下载温馨提示:该文档是我店铺精心编制而成,希望大家下载以后,能够帮助大家解决实际的问题。
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简述现代制浆造纸工艺流程英文回答:Modern pulp and papermaking processes involve several stages, including pulp preparation, paper formation, and paper finishing. Let me walk you through the process step by step.1. Pulp Preparation:The first step in the process is preparing the pulp, which involves breaking down the raw materials into fibers. There are two main methods for pulp preparation: mechanical pulping and chemical pulping.In mechanical pulping, the raw materials, such as wood chips or recycled paper, are mechanically ground and refined to separate the fibers. This process is often used for producing newsprint or packaging paper.Chemical pulping, on the other hand, involves treating the raw materials with chemicals to dissolve the lignin and separate the fibers. There are two common types of chemical pulping: kraft pulping and sulfite pulping. Kraft pulpingis widely used due to its high yield and strong fibers, while sulfite pulping is suitable for producing specialty papers.2. Paper Formation:Once the pulp is prepared, it is ready for paper formation. The pulp is diluted with water and mixed with additives, such as fillers, sizing agents, and dyes, to enhance the paper's properties.The diluted pulp is then fed onto a paper machine, which consists of a headbox, wire section, press section, and drying section. In the headbox, the pulp is evenly distributed onto a moving wire mesh, forming a thin layer of fibers. The water is drained through the wire mesh, leaving behind a wet sheet of paper.Next, the wet sheet passes through the press section, where pressure is applied to remove more water and consolidate the fibers. Finally, the paper enters the drying section, where it is heated and dried using steam-heated cylinders or hot air.3. Paper Finishing:After the paper is dried, it goes through various finishing processes to improve its quality and appearance. These processes include calendering, coating, and cutting.Calendering involves passing the paper through a set of rollers to smoothen the surface and improve its gloss and printability. Coating can be applied to enhance the paper's properties, such as brightness, smoothness, or water resistance. Finally, the paper is cut into sheets or rolls of desired sizes.中文回答:现代制浆造纸工艺流程包括制浆准备、纸张成型和纸张加工等几个阶段。
最新制浆造纸⼯艺流程的各个⼯段及其作⽤制浆造纸⼯艺流程的各个⼯段及其作⽤制浆段:原料选择→蒸煮分离纤维→洗涤→漂⽩→洗涤筛选→浓缩或抄成浆⽚→储存备⽤抄纸段:散浆→除杂质→精浆→打浆→配制各种添加剂→纸料的混合→纸料的流送→头箱→⽹部→压榨部→⼲燥部→表⾯施胶→⼲燥→压光→卷取成纸涂布段:涂布原纸→涂布机涂布→⼲燥→卷取→再卷→超级压光加⼯段:复卷→裁切平板(或卷筒)→分选包装→⼊库结束现代的造纸程序可分为制浆、调制、抄造、加⼯等主要步骤1.制浆的过程制浆为造纸的第⼀步,⼀般将⽊材转变成纸浆的⽅法有机械制浆法、化学制浆法和半化学制浆法等三种。
2.调制过程纸料的调制为造纸的另⼀重点,纸张完成后的强度、⾊调、印刷性的优劣、纸张保存期限的长短直接与它有关。
⼀般常见的调制过程⼤致可分为以下三步骤:a. 散浆 b.打浆 c.加胶与充填3.抄造过程抄纸部门的主要⼯作为将稀的纸料,使其均匀的交织和脱⽔,再经⼲燥、压光、卷纸、裁切、选别、包装,故⼀般常见之流程如下:a.纸料的筛选将调制过的纸料再稀释成较低的浓度,并借着筛选设备,再次的筛除杂物及未解离纤维束,以保持品质及保护设备。
b.⽹部使纸料从头箱流出在循环的铜丝⽹或塑料⽹上并均匀的分布和交织。
c.压榨部将⽹⾯移开的湿纸引到⼀附有⽑布的⼆个滚辘间,藉滚辘的压挤和⽑布的吸⽔作⽤,将湿纸作进⼀步的脱⽔,并使纸质较紧密,以改善纸⾯,增加强度。
d.压光由于经过压榨后的湿纸,其含⽔量仍⾼达52-70%,此时已⽆法再利⽤机械⼒来压除⽔分,故改让湿纸经过许多个内通热蒸⽓的圆筒表⾯使纸⼲燥。
e.卷纸由于经过压榨后的湿纸,其含⽔量仍⾼达52-70%,此时已⽆法再利⽤机械⼒来压除⽔分,故改让湿纸经过许多个内通热蒸⽓的圆筒表⾯使纸⼲燥。
g.裁切、选别包装:取前⾯已卷成筒状的纸卷多⽀,⽤裁纸机裁成⼀张张的纸,再经⼈⼯或机械的选别,剔除有破损或污点的纸张,最后将每五百张包成⼀包(通常叫做⼀令)。
制浆浆板车间工艺流程英文回答:The process flow of the pulp board workshop typically involves several steps.1. Wood Preparation: The first step is to prepare the wood for pulping. This involves debarking the logs and chipping them into small pieces. The wood chips are then screened to remove any impurities.2. Pulping: The wood chips are then fed into a digester, where they are cooked with chemicals and steam to break down the lignin and separate the fibers. This process canbe done using either the kraft or sulfite pulping method.3. Bleaching: After pulping, the fibers are usually bleached to remove any residual lignin and achieve the desired brightness. This is typically done using a combination of chemicals and washing stages.4. Papermaking: The bleached fibers are then mixed with water to form a pulp slurry. The slurry is then passed through a series of screens and filters to remove any remaining impurities. It is then spread onto a wire mesh conveyor belt, where water is drained and the fibers begin to bond together.5. Pressing and Drying: The partially formed paper sheet is then pressed between large rollers to remove more water and further consolidate the fibers. It is then passed through a series of heated rollers to dry the sheet completely.6. Calendering and Finishing: The dried paper sheet may go through a calendering process, where it is passed through a set of rollers to smoothen and enhance its surface. It may also undergo additional treatments, such as coating or sizing, to improve its properties for specific applications.7. Cutting and Packaging: The final step involvescutting the paper into desired sizes and packaging it for distribution and sale.中文回答:制浆浆板车间的工艺流程通常包括以下几个步骤。
石灰石浆液制备工艺流程下载温馨提示:该文档是我店铺精心编制而成,希望大家下载以后,能够帮助大家解决实际的问题。
文档下载后可定制随意修改,请根据实际需要进行相应的调整和使用,谢谢!Download Tip: This document has been carefully written by the editor. I hope that after you download, they can help you solve practical problems. After downloading, the document can be customized and modified. Please adjust and use it according to actual needs. Thank you!石灰石浆液制备工艺流程:①原料接收与储存:通过卡车或输送系统将石灰石粉或块料运送至工厂,存储于石灰石仓中。
②物料输送:启动仓顶布袋除尘器,确保环境清洁,随后开启斗式提升机,将石灰石送入破碎机或直接送往下一流程。
③破碎与筛分:大块石灰石经过破碎机破碎至所需粒度,筛分后确保粒径符合制浆要求。
④计量给料:利用皮带称重给料机精确计量石灰石粉,按配比加入工艺水中。
⑤湿磨制浆:破碎后的石灰石与适量工艺水在球磨机中研磨,形成均匀细腻的石灰石浆液。
⑥密度调节:通过滤液水的自动添加控制浆液密度,确保达到脱硫反应的最佳条件。
⑦浆液循环:利用石灰石浆液循环泵,将浆液送入石灰石旋流器进行分级,底流返回再循环箱,溢流则作为成品浆液。
⑧自动控制:再循环箱液位与旋流器流量通过自动控制系统调节,维持浆液制备系统的稳定运行。
⑨成品浆液供给:经过充分混合与调节的石灰石浆液被送至脱硫吸收塔,用于SO₂等酸性气体的吸收。
纸浆造纸的生产流程纸浆是制造纸张的重要原料,其生产流程包括制浆和造纸两个主要过程。
下面将详细介绍纸浆造纸的生产流程。
一、制浆过程1. 原料准备纸浆的主要原料有木材、废纸和农作物秸秆等。
首先,根据需要的纸张种类和质量要求,选择合适的原料。
然后,将原料进行切割、剥皮、破碎等预处理步骤,使其变成适合制浆的形态。
2. 煮浆煮浆是将原料加热至一定温度,使木质纤维素分解为纤维,并将纤维从杂质中分离出来的过程。
该过程分为化学煮浆和机械煮浆两种方式。
- 化学煮浆:将原料与化学药品一起加入煮浆釜中进行煮炼。
其中,硫酸法是最常用的化学煮浆方法之一,其通过与木材中的纤维素反应,使木材组织松软,并溶解掉木材中的非纤维成分。
- 机械煮浆:通过机械力的作用将原料破碎成纤维状态,达到分离纤维和杂质的目的。
机械煮浆适用于废纸等纤维素含量较高的原料。
3. 筛选和洗涤经过煮浆后,得到的是混合纤维和杂质的糊状物,需要通过筛选和洗涤来去除杂质和纤维束的大小和长度不均匀性。
- 筛选:将糊状物通过筛网进行筛分,将纤维和较大杂质分离出来。
同时,通过调整筛网的孔径和振动频率,控制所需纤维的长度和纤维束的大小。
- 洗涤:用水洗涤纤维,将浆液中的杂质通过洗涤剂和水冲刷去除,使纤维更加干净。
4. 漂白漂白是将纸浆中的杂质和色素去除,以便获得纯净、白色的纸浆。
漂白一般采用化学漂白方法,如氧化漂白、还原漂白和氯气漂白等。
不同的漂白方法根据纸张的种类和质量要求来选择。
二、造纸过程1. 纸浆调理经过制浆过程得到的纸浆还需经过调理,以控制纤维的长度和质量。
调理主要通过添加化学成分,如粘合剂、抗湿剂和增白剂等,以增加纸张的强度、耐久性和光洁度。
2. 送浆将调理好的纸浆送入造纸机,纸浆通过管道进入制浆机内部进行成型。
3. 纸张成型纸浆在制浆机内进行湿压成型,将纸浆在筛板上均匀分布,并通过抽真空的方式将水分抽除,使纸浆成型。
4. 干燥纸浆成型后,纸张经过烘干和压光等处理,将纸张表面的水分蒸发掉,使纸张变得干燥且平整。
碱法制浆的生产流程英文回答:Kraft Pulping Process.The Kraft pulping process is a chemical pulping process that uses a mixture of sodium hydroxide and sodium sulfide to dissolve lignin, the glue-like substance that holds wood fibers together. The Kraft process is the most widely used pulping process in the world, and it is used to produce a wide variety of paper products, including printing and writing paper, packaging paper, and tissue paper.The Kraft pulping process consists of the following steps:1. Wood preparation: The wood is debarked and chipped into small pieces.2. Cooking: The wood chips are cooked in a digesterwith a mixture of sodium hydroxide and sodium sulfide. The cooking process dissolves the lignin and separates the wood fibers.3. Washing: The cooked pulp is washed to remove the spent cooking liquor.4. Screening: The pulp is screened to remove any remaining wood chips or other impurities.5. Bleaching: The pulp is bleached to remove any remaining lignin and to brighten the pulp.6. Drying: The pulp is dried to remove excess water.7. Finishing: The pulp is finished by calendering or coating to give it the desired properties.中文回答:碱法制浆工艺流程。
废纸制浆流程及主要设备概况废纸制浆是指将废纸通过一系列的工艺流程转化为纸浆的过程。
废纸制浆可以有效回收废弃纸张资源,对环境具有较高的可持续性,被广泛应用于纸浆和纸张行业。
废纸制浆的主要流程包括废纸的回收与筛分、废纸的打浆与粉碎、废纸的漂白和废纸浆的处理与保存。
1.废纸的回收与筛分:废纸采购商定期收集废纸,将其送至废纸回收站。
废纸回收站对废纸进行初步的筛分工作,将纸张、纸板和纸箱等不同种类和质量的废纸分类处理。
2.废纸的打浆与粉碎:分类后的废纸送至浆池,加入适量的水和化学药剂进行浆料制备。
废纸经过浸泡和搅拌后,纤维被释放出来形成纸浆。
随后,废纸通过破碎机进行粉碎,使纸浆中的纤维更加细小。
3.废纸的漂白:废纸制浆中的漂白工序主要是为了去除废纸中的油墨、漂白剂和杂质等,使纸浆具备更好的可加工性。
漂白方法常用的有氧漂白和氯漂白。
氯漂白是一种常用的漂白方法,它可以通过化学反应去除废纸中的有色物质,提高纸浆的白度。
4.废纸浆的处理与保存:漂白后的纸浆通过搅拌器和过滤机进行搅拌和过滤,去除多余的水分和杂质。
然后,纸浆被储存在纸浆池中,等待下一步纸张生产工艺的需求。
废纸制浆的主要设备包括:1.浆料制备设备:包括浆池、搅拌器和加药系统等。
浆池用于接收废纸,浆料加药和搅拌器用于将废纸转化为纸浆,加入化学药剂调节纸浆的性质。
2.粉碎设备:包括破碎机和磨浆机等。
破碎机用于将废纸粉碎成合适大小的碎片,磨浆机通过摩擦和压力使碎纸进一步分散,形成细小的纸浆颗粒。
3.漂白设备:包括漂白塔、氧化还原酶和氯漂白系统等。
漂白塔用于进行氯漂白或氧漂白,去除废纸中的有色物质。
氧化还原酶和氯漂白系统是漂白过程中所需的化学药剂和设备。
4.搅拌与过滤设备:包括搅拌器和过滤机等。
搅拌器用于混合纸浆和化学药剂,使纸浆均匀分散。
过滤机通过滤布和压力过滤纸浆,去除多余的水分和杂质。
除了以上主要设备外,废纸制浆过程中还可能涉及废水处理设备、环保设备和自动化控制系统等。
1、制浆工艺流程
1)植物纤维原料制浆(木浆、非木浆)工艺流程
说明:纤维离解对化学法制浆工艺是蒸煮过程,对机械法制浆工艺是
粗磨过程,对化机法、半化学法制浆工艺是化学预处理过程和磨浆过
程。
(2)废纸原料制浆工艺流程
2、造纸工艺流程
说明:①造纸机的干部和湿部都要有损纸回抄过程;②以上工序可以
根据制浆造纸企业制造方法、产品品种和档次的不同有所增加或删
减。