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公开(公告)号：US11186949B2
公开(公告)日：2021-11-30
申请号：US16348794
申请日：2017-12-07
申请人： Valmet AB
摘要： The invention relates to a method for impregnating biomass (10). In a step (S100) of the method, a reactor unit (11) is fed with biomass (10) by means of a plug screw (12). In another step (S200), the reactor unit (11) is at least partially filled up to a predetermined fill level (13) with a reactant (18), such that a reaction between the fed biomass (10) and the reactant (18) takes place in order to obtain an impregnated biomass. In another step (S300), the impregnated biomass (10) is discharged from the reactor unit (11) for further processing (S300). The invention further relates to a device (1) for impregnating biomass (10).
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公开(公告)号：US10392747B2
公开(公告)日：2019-08-27
申请号：US13209802
申请日：2011-08-15
摘要： A method is disclosed for optimization of continuous digestion process. Exemplary embodiments can control a delignification process in a continuous pulp digester in an optimal way for different pulp grades taking into account process disturbances and model uncertainties. This can be achieved by customizing a generic mathematical model for a continuous digestion process which runs through a software application on a dedicated electronic device. The model can be updated periodically based on on-line information, and used with a plant optimization component involving multi-objective optimization to evaluate optimal set points for the controllers. A system is also disclosed for optimizing control of a continuous pulp digester.
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公开(公告)号：US08834675B2
公开(公告)日：2014-09-16
申请号：US12781827
申请日：2010-05-18
申请人： Sebastien Tixier
发明人： Sebastien Tixier
摘要： Scale formation on the electrode(s) of a liquor sensor can be prevented by continuously delivering a water-soluble scale inhibitor or dispersant into the vicinity of the electrodes of a liquor sensor device. Scale inhibitors include, for instance, polymers that are derived from acrylic acid, maleic acid, acrylamide acid, phosphonate, and combinations thereof. An aqueous mixture of scaling inhibitor continuously delivered to the probe tip of the liquor sensor that was placed in a kraft pulping liquor allowed the sensor to operate accurately for over a month without having to be cleaned of scale.
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公开(公告)号：US20110139384A1
公开(公告)日：2011-06-16
申请号：US12999189
申请日：2009-07-01
摘要： Apparatus and methods for controlling the flow of a pulp suspension from a container in which the pulp is processed or stored are disclosed. The container is pressurized to a first pressure and includes an outlet for the pulp suspension, a pump includes an inlet and an outlet, and the pump inlet is connected to the container. The pulp suspension is fed from the inlet to the outlet of the pump and provides a controlled decrease in pressure to which the pulp suspension is subjected in the pump during such transport, and the flow from the container is controlled by adjusting this controlled decrease in pressure.
摘要翻译： 公开了用于控制纸浆悬浮液从其中处理或储存纸浆的容器中流动的装置和方法。 容器被加压到第一压力并且包括用于纸浆悬浮液的出口，泵包括入口和出口，并且泵入口连接到容器。 纸浆悬浮液从泵的入口进料到出口，并且在这种运输期间提供了在泵中经受纸浆悬浮液的压力的受控降低，并且通过调节该受控的压力降低来控制来自容器的流量 。
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5.发明申请公开(公告)号：US20090139671A1
公开(公告)日：2009-06-04
申请号：US12277319
申请日：2008-11-25
申请人： Kent-Olof Karlsson , Daniel Trolin
发明人： Kent-Olof Karlsson , Daniel Trolin
IPC分类号： D21C7/12
CPC分类号： D21C1/02
摘要： The arrangement and method are for the steam pre-treatment of chips during the production of cellulose pulp to avoid the blow-through of gases in the steam pre-treatment vessel. This prevents foul-smelling gases from being released into the atmosphere. Spreader nozzles for the injection of cooling fluid are arranged in the gas phase of the steam pre-treatment vessel. In the event of the risk for blow-through of steam, cooling that is proportional to the risk is activated. It is possible to avoid the emission of gases from the chip bin when interruptions in the process occur, whereby the release of odours into the surroundings can be minimised.
摘要翻译： 该装置和方法用于在生产纤维素纸浆期间对芯片进行蒸汽预处理，以避免蒸汽预处理容器中气体的吹胀。 这样可以防止臭味气体被释放到大气中。 用于注入冷却流体的撒布机喷嘴布置在蒸汽预处理容器的气相中。 在发生蒸汽风险的情况下，与风险成正比的冷却被激活。 当发生过程中断时，有可能避免从碎片箱排出气体，从而可以将气味释放到周围环境中。
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6.发明授权公开(公告)号：US07390669B2
公开(公告)日：2008-06-24
申请号：US10999912
申请日：2004-11-30
申请人： Jian Li , Xin Sheng Chai , Junyoung Zhu
发明人： Jian Li , Xin Sheng Chai , Junyoung Zhu
CPC分类号： G01N33/343 , G01N21/33 , G01N21/552 , G01N21/85 , Y10T436/15 , Y10T436/156666 , Y10T436/184 , Y10T436/203332 , Y10T436/204998
摘要： The present invention is a rapid method of determining the concentration of the major components in a chemical stream. The present invention is also a simple, low cost, device of determining the in-situ concentration of the major components in a chemical stream. In particular, the present invention provides a useful method for simultaneously determining the concentrations of sodium hydroxide, sodium sulfide and sodium carbonate in aqueous kraft pulping liquors through use of an attenuated total reflectance (ATR) tunnel flow cell or optical probe capable of producing a ultraviolet absorbency spectrum over a wavelength of 190 to 300 nm. In addition, the present invention eliminates the need for manual sampling and dilution previously required to generate analyzable samples. The inventive method can be used in Kraft pulping operations to control white liquor causticizing efficiency, sulfate reduction efficiency in green liquor, oxidation efficiency for oxidized white liquor and the active and effective alkali charge to kraft pulping operations.
摘要翻译： 本发明是确定化学物流中主要成分浓度的快速方法。 本发明也是简单，低成本的确定化学物流中主要成分的原位浓度的装置。 特别地，本发明提供了一种用于通过使用能够产生紫外线的衰减全反射（ATR）隧道流动池或光学探针同时测定水溶液硫酸盐制浆液中的氢氧化钠，硫化钠和碳酸钠的浓度的有用方法 在190至300nm的波长下的吸收光谱。 此外，本发明消除了以前为生成可分析样品而需要手动取样和稀释的需要。 本发明的方法可用于硫酸盐法制浆操作，以控制白液苛化效率，绿液中的硫酸盐还原效率，氧化白液的氧化效率和对硫酸盐制浆操作的有效和有效的碱电荷。
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7.发明授权公开(公告)号：US07381303B2
公开(公告)日：2008-06-03
申请号：US11014336
申请日：2004-12-16
IPC分类号： D21C7/12
CPC分类号： D21D1/002
摘要： Thermomechanical pulp is an important process for producing fibrous mass used in papermaking. A two-level control strategy that stabilizes and optimizes the refining process has been developed. The Stabilization layer consists of a multivariable model predicative range controller that regulates the refiner line operations. The Quality Optimization layer provides the pulp quality control as measured by an online pulp quality (freeness, fibre length) sensor. This control startegy leverages the natural decoupling in the process. The modular design technique is able to handle multiple refiner lines that empty into a common latency chest. A global optimizer is also used to integrate and coordinate the two layers for enhanced constraint handling.
摘要翻译： 热机械纸浆是生产用于造纸的纤维块的重要工艺。 已经开发了稳定和优化精炼过程的两级控制策略。 稳定层由调整精炼机线路运行的多变量模型预测范围控制器组成。 质量优化层提供了通过在线纸浆质量（游离度，纤维长度）传感器测量的纸浆质量控制。 这种控制开始利用了过程中的自然去耦。 模块化设计技术能够处理多个精炼线，将其排入普通滞后的胸部。 全局优化器也用于整合和协调两层以增强约束处理。
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8.发明授权System and method for controlling a processor including a digester utilizing time-based assessments 有权用于控制处理器的系统和方法，包括利用基于时间的评估的消化器公开(公告)号：US07204914B2
公开(公告)日：2007-04-17
申请号：US10639509
申请日：2003-08-13
申请人： Kari Juhani Lampela
发明人： Kari Juhani Lampela
IPC分类号： D21C7/12
CPC分类号： G01N33/343 , D21C3/228 , D21C7/12 , D21C9/1052 , D21C11/0064 , G01N1/2035 , G01N33/34 , G01N2001/2064 , G05B13/024 , Y10S162/10
摘要： A system for controlling a processor having at least one sampling port connected to a stage of the processor in order to sample a reactant product from the processor. The system includes a controller configured to control a processing parameter of the processor based on measurements of at least one property of the reactant product such that changes to the processing parameter maintain a target value for the at least one property of the reactant product. The system further includes a dead time compensator. The dead time compensator is configured, based upon a prescribed dead time related to a time before at least one effect of at least one change to the processing parameter is fully realized, to evaluate the reactant product to determine if the effect has been realized at a plurality of sequential times offset from the dead time.
摘要翻译： 一种用于控制处理器的系统，所述处理器具有连接到所述处理器的级的至少一个采样端口，以便从所述处理器采样反应物产品。 该系统包括控制器，其被配置为基于对反应物产物的至少一个性质的测量来控制处理器的处理参数，使得对处理参数的改变保持反应物产物的至少一个性质的目标值。 该系统还包括一个死区补偿器。 死区补偿器基于与完全实现至少一个改变的至少一个效果之前的时间相关的规定的死区时间来配置，以评估反应物产物，以确定效果是否已经在 多个顺序时间偏离死区时间。
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公开(公告)号：US06913672B2
公开(公告)日：2005-07-05
申请号：US10660298
申请日：2003-09-11
申请人： Wu-hwa Wesley Hsu
发明人： Wu-hwa Wesley Hsu
CPC分类号： G01N33/343 , D21C7/12 , G01N31/164
摘要： Chemical species (e.g., metaborate, carbonate, hydroxide and sulfide) in a boron-containing alkaline wood pulping liquor sample are determined quantitatively by (i) subjecting a first aliquot portion of the sample to a primary acid titration analysis to derive multiple equivalence points at different respective pH values; (ii) subjecting a second aliquot portion of the sample to an analysis to determine the quantitative presence of boron or sulfide ions therein, and then (iii) determining the quantitative presence in the sample of at least one of the chemical species. Wood pulping parameters may thus be determined on the basis of the quantitative presence of the chemical species to assist in process and/or quality control of the wood pulping operation. For example, the sample may be analyzed for boron content using colorimetry or atomic spectroscopy and/or analyzed for sulfide ion content using a secondary silver sulfide precipitation titration analysis, each of which may be conducted substantially simultaneously with the primary acid titration analysis.
摘要翻译： 通过以下步骤定量测定含硼碱性木材制浆液样品中的化学物质（例如偏硼酸盐，碳酸盐，氢氧化物和硫化物）：（i）使样品的第一等分试样部分进行初级酸滴定分析，以得出多个等效点 不同的各自的pH值; （ii）使样品的第二等分试样部分进行分析以确定其中的硼或硫化物离子的定量存在，然后（iii）确定样品中至少一种化学物质的定量存在。 因此可以基于化学物质的定量存在来确定木材制浆参数，以辅助木材制浆操作的过程和/或质量控制。 例如，可以使用比色法或原子光谱分析样品的硼含量和/或使用二次硫化银沉淀滴定分析来分析硫化物离子含量，其中每一个可以与初级酸滴定分析基本上同时进行。
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10.发明申请Kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation 有权通过氧化生成的多硫化物液热处理牛皮纸浆产量公开(公告)号：US20050072539A1
公开(公告)日：2005-04-07
申请号：US10991527
申请日：2004-11-19
申请人： Ronald van Heek , Gilles Dorris , Victor Uloth , Natalie Page , Thomas Hu , Denys Leclerc
发明人： Ronald van Heek , Gilles Dorris , Victor Uloth , Natalie Page , Thomas Hu , Denys Leclerc
CPC分类号： D21C11/0057
摘要： Oxidized white liquor is heat treated to increase the concentration of polysulphide measured at 285 or 286 nm (PSUV) or measured at 416 nm (PSVIS) and the PSUV/PSGR or PSVIS/PSGR ratio, whereby the content of active polysulphide in the total polysulphide is increased which active polysulphide can be exploited to increase pulp yield in Kraft pulping.
摘要翻译： 氧化白液经热处理以提高在285或286nm（PSUV）下测量或在416nm（PSVIS）和PSUV / PSGR或PSVIS / PSGR比例下测量的多硫化物的浓度，由此在总多硫化物中活性多硫化物的含量 增加了活性多硫化物可以利用以提高硫酸盐法制浆中的纸浆产量。
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