WO2009140808A1 - 环保节能循环型无污染制浆工艺及其系统装置 - Google Patents

环保节能循环型无污染制浆工艺及其系统装置 Download PDF

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Publication number
WO2009140808A1
WO2009140808A1 PCT/CN2008/001776 CN2008001776W WO2009140808A1 WO 2009140808 A1 WO2009140808 A1 WO 2009140808A1 CN 2008001776 W CN2008001776 W CN 2008001776W WO 2009140808 A1 WO2009140808 A1 WO 2009140808A1
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WIPO (PCT)
Prior art keywords
bleaching
sulphate sulphate
pulping
cooking
pulping process
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Application number
PCT/CN2008/001776
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English (en)
French (fr)
Inventor
李刚荣
李军
Original Assignee
Li Gangrong
Li Jun
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Publication date
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Publication of WO2009140808A1 publication Critical patent/WO2009140808A1/zh

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds

Definitions

  • the invention relates to a pulping process and a device thereof, in particular to an environmentally-friendly and energy-saving circulating type pollution-free pulping process and a system device thereof.
  • the Chinese patent CN1184183A introduces an alkaline substance such as NaOH or Na 2 S0 4 , and then adds a certain amount of alcohol such as ethanol to improve the black liquor properties of the alkali pulping, and reduce the viscosity of the silicic alkali to facilitate alkali recovery. system running.
  • the invention provides an environmentally-friendly and energy-saving circulating type pollution-free pulping process and a system device thereof, and solves the problem of waste pollution such as pulping, especially grass pulping black liquor pollution, washing concentrated sewage pollution problem, and effluent waste, etc. In the sense, it solves the problems of complicated processes and serious pollution in the traditional pulping methods.
  • the environmentally-friendly and energy-saving circulating type pollution-free pulping process of the invention comprises the steps of cutting material, screening dust removal, raw material silk refining, steaming and bleaching integration, refining and screening purification, and the like: the integrated steaming and bleaching process comprises raw material pre-dipping, The first step of the steaming and bleaching process is to add the prepreg prepreg material to the pre-dip material for 30-60 minutes, the pre-dip temperature is 50-100 Torr, and the pre-dip is added to the retort medicinal agent, and at the same time, 0. 1- 0. 3Mpa O.
  • the prepreg comprising EDTA 0. 2-1%, a base of 0. 5-3. 5 %.
  • the cooking agent comprises a base 2-6%, magnesium sulfate 0. 5-2%.
  • the bleaching agent comprises sodium silicate 1-5%, alkali 2-6%, hydrogen peroxide 1-4%, and magnesium sulfate 0.5 to 2%.
  • the base includes sodium hydroxide, potassium hydroxide and calcium hydroxide.
  • the above-mentioned dosages are all based on the weight percentage of the dry raw materials, and the total integration time of the steaming and bleaching process is 120-270 minutes, the reaction temperature is 50-100 ° C, and the reaction concentration is 15-20% (based on dry pulp).
  • the system device of the environmental protection energy-saving circulating type pollution-free pulping process of the invention comprises:
  • Wastewater treatment recycling system Waste and residual liquid passing through the dewatering system equipment After water treatment such as sedimentation and filtration, it flows into the reuse tank and is recycled to the water equipment used in the entire system.
  • Waste residue treatment recycling system By screening other non-material impurities such as fine raw materials under dust removal, and sediments by biochemical physical treatment, high-concentration waste residue produced by pressure filtration equipment is uniformly mixed by mixing system equipment. The waste residue is processed by the drying and pulverizing granulating equipment, and then enters the biomass gasification heating system and the biomass gasification power generation system respectively, and generates heat energy and electric energy for use in the whole environmental protection and energy saving circulating type pollution-free pulping process system device. .
  • the environmentally-friendly and energy-saving circulating type pollution-free pulping process and the system device thereof are applicable to various grass plant raw materials and wood raw materials.
  • the specific equipment of the system device of the environmentally-friendly and energy-saving circulating type pollution-free paddle process of the present invention is as follows:
  • the cutting equipment is suitable equipment for different raw material selection, such as knife-roller mower, cutting machine, disc chipper, etc.;
  • the screening dust removal equipment is suitable for different raw materials, such as a claw dust remover, a double cone dust remover, a cyclone separator and the like;
  • the raw material separation and refining equipment is available for different types of refining equipment such as spiral roller type, flying blade type and toothed disc type for the raw material type;
  • the dewatering and concentrating system equipment can be equipped with single-double screw extruder, belt filter press, twin-roller pulverizer and other concentrated dewatering equipment;
  • the slurry storage device is a certain volume of the slurry tank and a stirrer for keeping the slurry in a uniform state;
  • the refining equipment can be equipped with a high-concentration, medium-concentration and low-concentration refiner to select suitable refining equipment for different pulp types;
  • the screening and purification equipment may be selected from pressure screening, rotor screen, centrifugal sieve, etc.; the raw material processing equipment is sedimentation, flocculation, filtration, etc., for processing C0D ⁇
  • the filter press is used for sedimentation after biochemical treatment, and is filtered into a high concentration waste residue.
  • the mixing equipment mixes the waste generated in each part of the system with each other.
  • a two-roll mixer can be used.
  • N2008/001776 Drying equipment is the dryness and dehydration of the mixed high-concentration waste residue to achieve the dryness required for biomass granulation.
  • the dry heat source can be recycled by the electric energy generated by biomass gasification, and dried by electric heating and drying. And the method of drying the thermal energy steam generated by biomass gasification heating; the pulverization granulation system, the biomass gasification heating system, the biomass power generation system for the comprehensive reuse of biomass, and the system for generating thermal energy and electric energy recycling Device.
  • the environmentally-friendly and energy-saving circulating type pollution-free pulping process and the system device thereof are integrated into the cooking and bleaching, and the whole pulping process and the system device are in the process of discharging non-polluting substances and recycling waste water.
  • the cooking and bleaching process there is no washing or dehydration in the middle; it has the advantages of clear water-saving and energy-saving clean pulping, and the water desorbed from the pulp after bleaching does not contain harmful carcinogens such as dioxins, and the COD content of the extracted water is 2000-3000mg.
  • the environmentally-friendly and energy-saving circulating type pollution-free pulping process and system device thereof of the invention fundamentally solve the problems of high pollution and high energy consumption of the pulp and paper industry, and promote the recycling and sustainable development of agricultural resources, and protect us.
  • Figure 1 is a process flow diagram of the present invention.
  • the raw materials are cut by a knife-roller mower, screened and dusted by a horn filter, and then passed into a spiral roller type wire-cutting machine to carry out fine-graining of the raw material, and then enter the multi-functional steaming and bleaching system slurry equipment.
  • the prepreg is added to the multi-functional steaming and bleaching system slurry apparatus, the pre-dip time is 30 min, the temperature is 50 ° C, and the cooking agent and oxygen are introduced after the pre-dip is completed, and the oxygen pressure is O. lMpa, and the reaction time is 45 min.
  • the reaction temperature is 60 ° C. After the cooking is finished, the bleaching agent is continuously introduced.
  • the bleaching reaction time is 45 min, the temperature is 60 ° C, and the bleaching end is discharged.
  • the prepreg comprises 0.2% EDTA and 0.5% alkali;
  • the cooking agent comprises 2% alkali, 0.5% magnesium sulfate;
  • the bleaching agent comprises silicon Sodium 1%, base 2%, hydrogen peroxide 1% and magnesium sulfate 0.5%.
  • the slurry discharged from the bleaching end is dehydrated and concentrated by a screw extruder, and the bleaching slurry is introduced into the slurry tank to adjust to a certain concentration, and the slurry is uniformly suspended by the action of the agitator. Then enter the refining unit for fine grinding of the slurry, the slurry is sent to the pressure screen for screening, the good slurry is sent to the screw extruder for concentrated dewatering, and the coarse slurry is returned to the pulp pool before refining and re-refining.
  • the good pulp meets the requirements of pulping and online papermaking.
  • the residual liquid from the screw extruder used in the dewatering system and the concentration system is returned to the various sections of the system by physical precipitation and other biochemical treatment, and the sediment floc is passed through a filter press to form a high concentration waste residue.
  • the finely divided raw materials under the dust removal and other non-feedstock impurity sands are thoroughly mixed by a two-roll mixer, steam-dried, pulverized and granulated, and sent to biomass gasification power generation equipment and biomass gasification heating equipment. A large amount of electrical energy and heat are generated and reused for use in various system equipment.
  • the raw materials are cut by a knife-roller cutting machine or a disc-type cutting machine, and the dust is filtered by a double-cone dust-removing machine, and the disc-type wire-splitting machine is used to carry out fine-graining processing of raw materials, and then enters the multi-functional steaming and bleaching system slurry equipment.
  • the immersion agent is added to the multi-functional steaming and bleaching system, the pre-soaking time is 60 min, the temperature is 100 ° C, and the retort and oxygen are introduced after the pre-dip, the oxygen pressure is maintained at 0.3 Mpa, and the reaction time is 90 min.
  • the reaction temperature is 100 ° C.
  • the bleaching agent is continuously introduced, the bleaching reaction time is 120 min, the temperature is 100 ° C, and the bleaching end is discharged.
  • the prepreg comprises EDTA 1.0%, alkali 3.5%; the cooking agent comprises 6% alkali, magnesium sulfate 2%; the bleaching agent comprises 5% sodium silicate, 6% alkali, 4% hydrogen peroxide and sulfuric acid Magnesium 2%.
  • the slurry discharged from the bleaching end is dehydrated and concentrated by a single screw press, and the bleaching slurry is introduced into the slurry tank to adjust to a certain concentration, and the slurry is in a state of being suspended by the action of the agitator. Then enter the refining unit for fine grinding slurry, and then send the slurry to the centrifugal sieve for screening.
  • the good slurry is sent to the single screw press for concentration and dehydration.
  • the coarse slurry is returned to the pulp pool before refining and re-refining.
  • the good pulp meets the requirements of pulping and online papermaking.
  • the residual liquid from the single screw press used in the dewatering system and the concentration system is returned to the various sections of the system by physical precipitation and other biochemical treatment of the water, and the sediment flocs pass through the pressure.
  • the filter is made into a high-concentration waste slag, and the fine raw materials and other non-material impurity sands under the dust removal are mixed thoroughly by a two-roller mixer, steam-dried, pulverized and granulated, and sent to the biomass gasification power generation equipment. And biomass gasification heating equipment, generating a large amount of electrical energy heat, and then used in various system equipment.
  • the raw materials are cut by a knife-roller mower, and the dust is screened by a roller duster.
  • the fly-by-wire separator is used to refine the raw material, and then enter the multi-functional steaming and bleaching system.
  • the immersion agent is added to the multi-functional steaming and bleaching system, the pre-soaking time is 45 min, the temperature is 80 ° C, and the cooking agent and oxygen are introduced after the pre-dip, the oxygen pressure is 0. 2Mpa, and the reaction time is 70 min.
  • the reaction temperature is 80 ° C.
  • the bleaching agent is continuously introduced, the bleaching reaction time is 80 min, the temperature is 80 ° C, and the bleaching end is discharged.
  • the immersion agent comprises EDTA 0.6%, alkali 2%; the cooking agent comprises a base 4%, magnesium sulfate 1. 2%; bleaching agent comprises 3% sodium silicate, alkali 4%, hydrogen peroxide 2. 5% And magnesium sulfate 1. 2%.
  • the slurry discharged from the bleaching end is dehydrated and concentrated by a single screw press, and the bleaching slurry is introduced into the slurry tank to adjust to a certain concentration, and the slurry is uniformly suspended by the action of the agitator. Then enter the refining unit for fine grinding slurry, and the slurry is sent to the centrifugal sieve for screening. The good paddle is sent to the belt filter press for concentration and dehydration. The coarse slurry is returned to the pulp tank before refining and re-refining. After the good pulp reached the requirements of pulping online papermaking. .
  • the residual liquid from the single screw press and the belt filter press used in the dewatering system and the concentration system is returned to the various sections of the system by physical precipitation and other biochemical treatment of the water, and the sediment flocs pass through the pressure filtration mechanism.
  • the high-concentration waste residue is combined with the finely divided raw materials under the dust removal and other non-feedstock impurity sands, etc., and then thoroughly mixed by a two-roller mixer, steam-dried, pulverized and granulated, and sent to the biomass gasification power generation equipment and raw
  • the material gasification heating equipment generates a large amount of electrical energy and is then used in various system equipment.

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  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
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Description

环保节能循环型无污染制浆工艺及其系统装置 技术领域
本发明涉及一种制浆工艺及其装置，特别是涉及一种环保节能循环 型无污染制浆工艺及其系统装置。
背景技术
目前， 我国以草类纤维或木材为原料的造纸厂遍布全国各地， 大部 分造纸厂采用碱法制浆工艺， 由切料、 除尘、 蒸煮、 洗涤、 筛选和漂白 等工序组成， 在蒸煮、 洗涤和筛选过程中， 排放大量污水， 水中悬浮物 及有机物质浓度高， 色泽深， 酸或碱性大， 可生化性差。 传统制浆工艺 不仅工序复杂， 浪费水、 酸或碱， 流失大量纤维， 而且给环境带来了严 重污染。 为了减少环境污染， 国家关闭了数千家中小制浆造纸厂， 造成 了很大的社会损失。 数千家有一定规模的企业， 急需一种低成本、 可靠 的无污染制浆工艺及其装置。
无污染制浆工艺一直是造纸领域研究的重要方向， 有许多新的技术 工艺及方案出现， 从不同的角度来探索解决问题的方法， 如德国专利
NO. 19730486， 介绍的方案是用液氨浸渍木片， 并在 20bar压力下保持 20min， 再通入蒸汽爆破处理， 处理后纤维原料排入容器中， 用乙醇：水 = 1： 1的溶液，反复抽提纤维原料， 乙醇水溶液中含有 85%的木素及 90 %的半纤维素。 中国专利 CN1184183A介绍的方案是采用 NaOH、 Na2S04等 碱性物质， 再加入一定量的乙醇等醇类物质来改善碱法制浆的黑液性质， 减小硅碱的粘度以便于碱回收系统运行。
上述方法仍然没有克服传统制浆方法的一些缺陷， 如蒸煮需要比较 高的温度， 制浆系统耗能高； 蒸煮和漂白工序间断、 复杂冗长， 并且蒸 煮黑液、 漂后残液、 沉淀物废渣等污染物没有一种切实有效的环保处理 方法， 因而制浆造纸工业急需一种低成本、 低能耗可靠的无污染制浆工 艺及其装置。 发明内容
为了克服现有制浆技术及制浆系统设备的不足。 本发明提供了一种 环保节能循环型无污染制浆工艺及其系统装置， 解决了制浆特别是草类 制浆黑液污染问题、 洗涤浓缩污水污染问题、 脱出的废渣等废物污染问 题， 真正意义上解决了传统制浆方法中广泛存在的工序复杂、 污染严重 的问题。
本发明的环保节能循环型无污染制浆工艺包括切料、 筛选除尘、 原 料分丝细化、 蒸漂一体、 磨浆和筛选净化等工序， 其特征在于： 蒸漂一 体工序包括原料预浸、 蒸煮和漂白过程， 所述的蒸漂一体工序是先加入 预浸药剂预浸原料 30-60min、 预浸温度为 50- 100Ό， 预浸后加入蒸煮药 剂， 同时通入 0. 1- 0. 3Mpa 的氧气进行蒸煮脱木素反应， 反应时间为 45 - 90min、 反应温度为 60- 100 °C， 蒸煮完后继续加入漂白药剂， 同时继 续通入氧气并保持氧压 0. l-0. 3Mpa， 漂白反应时间为 45-120min， 漂白 温度为 60- 100° (：。
所述的预浸药剂包含 EDTA 0. 2-1 %、 碱 0. 5-3. 5 %。
所述的蒸煮药剂包含碱 2-6%、 硫酸镁 0. 5-2%。
所述的漂白药剂包含硅酸钠 1-5%、碱 2-6%、过氧化氢 1-4%和硫 酸镁 0. 5-2%。
所述的碱包括氢氧化钠、 氢氧化钾和氢氧化钙。
上述药剂含量均以绝干原料的重量百分比计， 所述的蒸漂一体化工 序全程时间为 120- 270min， 反应温度为 50_100°C、 反应浓度为 15- 20% (以绝干浆计）。
本发明的环保节能循环型无污染制浆工艺的系统装置包括：
1. 切料设备； 2. 筛选除尘设备； 3. 原料分丝细化设备； 4. 多功 能蒸漂一体制浆设备； 5. 脱水设备； 6. 浆料贮存设备； 7. 磨浆设备； 8. 筛选净化设备； 9. 浓缩设备； 10. 生化物化处理设备； 11. 压滤设 备； 12. 混合设备； 13. 干燥设备； 14. 粉碎造粒设备； 15. 生物质气 化供热系统； 16. 生物质气化发电系统。
废水处理循环再利用系统： 由脱水系统设备脱出的废、 残液通过物 理沉淀、 过滤等水处理后， 流入回用贮水池， 循环回用于整个系统中的 各用水设备。
废渣处理循环再利用系统： 由筛选除尘下的碎细原料等其它非原料 杂质、 以及通过生化物化处理后的沉淀物， 经压滤设备制成的高浓度废 渣， 通过混合系统设备均匀混合各种废渣， 再通过干燥、 粉碎造粒设备 处理后， 分别进入生物质气化供热系统、 生物质气化发电系统， 产生热 能和电能回用于整个环保节能循环型无污染制浆工艺系统装置中。
本发明的环保节能循环型无污染制浆工艺及其系统装置适用于一年 生各种草类植物原料和木材类原料。
本发明的环保节能循环型无污染制桨工艺的系统装置的具体设备如 下：
切料设备是针对不同原料选择相适应的配套设备， 如刀辊式切草机、 切苇机、 盘式削片机等；
筛选除尘设备是针对不同原料可选用羊角除尘机、 双锥体除尘机、 旋风分离机等设备；
原料分丝细化设备是针对原料种类可选用螺旋辊式、 飞刀片式、 齿 盘式等不同分丝细化设备；
脱水和浓缩系统设备可选用单双螺旋挤浆机、 带式压滤机、 双辊挤 浆机等浓缩脱水设备；
浆料贮存设备为一定容积的浆池和使浆料处于均匀悬浮状态的搅拌 器；
磨浆设备可选用高浓式、 中浓式、 低浓式的磨浆机， 针对不同浆种 选择相适应的磨浆设备；
筛选净化设备可选用压力筛、 旋翼筛、 离心筛等筛选净化设备； 生化物化处理设备为沉淀、 絮凝、 过滤等设备， 用于处理 C0D<
3000mg/L的废水。
压滤机用于生化物化处理后沉淀物， 压滤成高浓度废渣。
混合设备是将系统各部分产生的废渣充分相互混合， 可选用双辊式 混合器。 N2008/001776 干燥设备是对混合后的高浓度废渣干燥脱水， 达到生物质造粒需要 的干度， 干燥热源可采用生物质气化发电产生的电能循环回用， 以电加 热干燥、 导热油干燥， 以及生物质气化供热产生的热能蒸汽干燥等方式； 粉碎造粒系统、 生物质气化供热系统、 生物质化发电系统为生物质综合 再利用， 产生热能和电能循环回用的系统装置。
本发明的环保节能循环型无污染制浆工艺及其系统装置集蒸煮漂白 于一体， 整个制浆工艺及其系统装置运行过程中无污染物质排放、 废水 废渣循环利用。 蒸煮漂白过程中， 中间不洗涤、 不脱水； 具有显著节水 节能等清洁制浆的优点， 并且浆料漂白后脱出的水中不含二噁英等有害 致癌物质， 脱出的水 COD含量 2000- 3000mg/L左右， 通过物理过滤、 沉 淀等水处理后循环回用于系统中， 对各段脱出的沉淀物压滤浓缩、 混合 干燥后的废渣， 作到物尽其用； 通过粉碎造粒， 生物质气化发电， 生物 质气化供热， 产生电能和热能循环回用于系统中。 本发明的环保节能循 环型无污染制浆工艺及其系统装置从根本上解决了制浆造纸工业的高污 染、 高能耗等问题， 并且促进农业资源的循环再利用和可持续发展， 以 及保护我们赖以生存的生态环境。
附图说明
图 1是本发明的工艺流程图。
具体实施方式
下面结合实施例对本发明作进一步的说明。
实施例 1
原料： 麦草或稻草
原料通过刀辊式切草机切料， 经羊角除尘机筛选除尘， 进入螺旋辊 式分丝机进行原料分丝细化处理， 再进入多功能蒸漂一体制浆设备中。 将预浸药剂加入多功能蒸漂一体制浆设备中，预浸时间为 30min，温度为 50°C , 预浸结束后通入蒸煮药剂和氧气， 保持氧压为 O. lMpa, 反应时间 为 45min, 反应温度为 60°C， 蒸煮结束后继续通入漂白药剂， 漂白反应 时间为 45min， 温度为 60°C， 漂白终点排料。其中， 预浸药剂包含 EDTA 0.2%、 碱 0.5% ; 蒸煮药剂包含碱 2%、 硫酸镁 0.5 % ; 漂白药剂包含硅 酸钠 1 %、 碱 2%、 过氧化氢 1 %和硫酸镁 0.5%。
由漂白终点排料后的桨料通过螺旋挤浆机脱水浓缩， 漂白浆料进入 浆池调节至一定浓度， 通过搅拌器的作用使浆料处于均匀悬浮状态。 再 进入磨浆机组进行精磨桨料， 浆料再送至压力筛进行筛选， 良浆送入螺 旋挤浆机浓缩脱水， 粗浆回流至磨浆机之前的浆池重新磨浆， 通过浓缩 后的良漿达到调浆上网抄纸的要求。
在脱水系统和浓缩系统中使用的螺旋挤浆机脱出的残液通过物理沉 淀过滤等生化物化处理后的水回用于系统各段， 沉淀物絮凝物通过压滤 机制成高浓度废渣， 联同筛选除尘下的碎细原料及其它非原料杂质砂粒 等通过双辊混合器充分混合后， 进行蒸汽干燥， 再进行粉碎造粒， 送入 生物质气化发电设备和生物质气化供热设备， 产生大量电能和热能， 再 回用于各系统设备中使用。
实施例 2
原料： 芦苇
原料通过刀辊式切苇机或盘式切苇机切料， 经双锥体除尘机筛选除 尘， 进入盘式分丝机进行原料分丝细化处理， 再进入多功能蒸漂一体制 浆设备中。 将预浸药剂加入多功能蒸漂一体制浆设备中， 预浸时间为 60min, 温度为 100°C， 预浸结束后通入蒸煮药剂和氧气， 保持氧压为 0. 3Mpa, 反应时间为 90min， 反应温度为 100°C， 蒸煮结束后继续通入漂 白药剂， 漂白反应时间 120min， 温度 100°C， 漂白终点排料。 其中， 预 浸药剂包含 EDTA 1. 0%、 碱 3. 5% ; 蒸煮药剂包含碱 6%、 硫酸镁 2% ; 漂白药剂包含硅酸钠 5%、 碱 6%、 过氧化氢 4%和硫酸镁 2%。
由漂白终点排料后的浆料通过单螺旋压榨机脱水浓缩， 漂白浆料进 入浆池调节至一定浓度， 通过搅拌器的作用使浆料处于均勾悬浮状态。 再进入磨浆机组进行精磨浆料， 浆料再送至离心筛进行筛选， 良浆送入 单螺旋压搾机浓缩脱水， 粗浆回流至磨浆机之前的浆池重新磨浆， 通过 浓缩后的良浆达到调浆上网抄纸的要求。
在脱水系统和浓缩系统中使用的单螺旋压搾机脱出的残液通过物理 沉淀过滤等生化物化处理后的水回用于系统各段， 沉淀物絮凝物通过压 滤机制成高浓度废渣， 联同筛选除尘下的碎细原料及其它非原料杂质砂 粒等通过双辊混合器充分混合后， 进行蒸汽干燥， 再进行粉碎造粒， 送 入生物质气化发电设备和生物质气化供热设备， 产生大量电能热能， 再 回用于各系统设备中使用。
实施例 3
原料： 棉秆
原料通过刀辊式切草机切料， 经辊式除尘机筛选除尘， 进入飞刀片 式分丝机进行原料分丝细化处理， 再进入多功能蒸漂一体制浆设备中。 将预浸药剂加入多功能蒸漂一体制浆设备中，预浸时间为 45min,温度为 80°C , 预浸结束后通入蒸煮药剂和氧气， 保持氧压为 0. 2Mpa， 反应时间 为 70min， 反应温度为 80°C， 蒸煮结束后继续通入漂白药剂， 漂白反应 时间 80min， 温度 80°C， 漂白终点排料。 其中， 预浸药剂包含 EDTA 0. 6 %、碱 2% ; 蒸煮药剂包含碱 4%、硫酸镁 1. 2% ; 漂白药剂包含硅酸钠 3%、 碱 4%、 过氧化氢 2. 5%和硫酸镁 1. 2%。
由漂白终点排料后的桨料通过单螺旋压搾机脱水浓缩， 漂白浆料进 入浆池调节至一定浓度， 通过搅拌器的作用使浆料处于均匀悬浮状态。 再进入磨浆机组进行精磨浆料， 桨料再送至离心筛进行筛选， 良桨送入 带式压滤机浓縮脱水， 粗浆回流至磨浆机之前的浆池重新磨浆， 通过浓 缩后的良浆达到调浆上网抄纸的要求。 .
在脱水系统和浓缩系统中使用的单螺旋压搾机和带式压滤机脱出的 残液通过物理沉淀过滤等生化物化处理后的水回用于系统各段， 沉淀物 絮凝物通过压滤机制成高浓度废渣， 联同筛选除尘下的碎细原料及其它 非原料杂质砂粒等通过双辊混合器充分混合后， 进行蒸汽干燥， 再进行 粉碎造粒， 送入生物质气化发电设备和生物质气化供热设备， 产生大量 电能热能， 再回用于各系统设备中使用。

Claims

权 利 要 求 书
1、 一种环保节能循环型无污染制浆工艺， 该工艺包括切料、 筛选除 尘、 原料细化、 蒸漂一体工序、 磨桨和筛选净化， 其特征在于： 蒸漂一 体工序包括原料预浸、 蒸煮和漂白过程， 所述的蒸漂一体工序是先加入 预浸药剂预浸原料 30- 60min、 预浸温度为 50-10(TC , 预浸后加入蒸煮药 剂， 同时通入 0. 1- 0. 3Mpa的氧气进行蒸煮脱木素反应， 反应时间为 45-90min、 反应温度为 60- 100°C， 蒸煮完后继续加入漂白药剂， 同时继 续通入氧气并保持氧压 0. 1 - 0. 3Mpa， 漂白反应时间为 45- 120min， 漂白温 度为 60- 100°C。
2、根据权利要求 1所述的制浆工艺， 其特征在于： 所述的预浸药剂以 绝干原料的重量百分比计， 包含 EDTA 0. 2-1 %、 碱 0. 5-3. 5%。
3、丰 权利要求 1或 2所述的制浆工艺， 其特征在于： 所述的蒸煮药 剂以绝干原料的重量百分比计， 包含碱 2-6%、 硫酸镁 0. 5-2%。
4、根据权利要求 1-3之一戶 M的制浆工艺， 其特征在于： 所述的漂白 药剂以绝干原料的重量百分比计， 包含硅酸钠 1-5%、碱 2-6%、过氧化 氢 1-4%和硫酸镁 0. 5-2 %。
5、根据权利要求 1-4之一戶¾的制浆工艺， 其特征在于： 所述的碱包 括氢氧化钠、 氢氧化钾和氢氧化钙。
6、根据权利要求 1-5之一 的制浆工艺， 其特征在于： 所述的蒸漂 一体工序的反应浓度以绝干浆计为 15-20% 0
7、根据权利要求 1-6之一戶 的制浆工艺， 其特征在于： 所述的制浆 工艺用于一年生各种草类植物原料和木材类原料。
8、根据权利要求 1-7之一戶; M的制浆工艺的系统装置， 该系统装置包 括切料设备、 筛选除尘设备、 原料分丝细化设备、 蒸漂一体制浆设备、 磨浆设备、 筛选净化设备和浓缩设备， 其特征在于： 所述的系统装置还 包括生化物化处理设备、 粉碎造粒设备、 生物质气化供热系统和生物质 气化发电系统， 产生的热能和电能回用于环保节能循环型无污染制浆工 艺中。
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