CN110755919A - System and method for producing precipitated calcium carbonate by using paper machine clear water - Google Patents
System and method for producing precipitated calcium carbonate by using paper machine clear water Download PDFInfo
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Abstract
本发明涉及用于利用纸机清白水生产沉淀碳酸钙的系统及方法。该系统包括清白水管路、网式过滤器、离心泵和袋式过滤器，其中，所述清白水管路用于将纸机清白水输送至生产沉淀碳酸钙的消化工段、合成工段、烟气洗涤工段和管路冲洗工段，所述网式过滤器、所述离心泵和所述袋式过滤器沿着纸机清白水输送方向从上游至下游依次设置在所述清白水管路上，所述网式过滤器用于保护所述离心泵，所述离心泵用于泵送纸机清白水，所述袋式过滤器用于过滤纸机清白水中的杂质。本发明能起到以下有益技术效果：能降低生产沉淀碳酸钙所需的清水使用量。
The present invention relates to a system and method for producing precipitated calcium carbonate from paper machine clean water. The system includes a clean water pipeline, a mesh filter, a centrifugal pump and a bag filter, wherein the clean water pipeline is used to transport the paper machine clean water to the digestion section, synthesis section, and flue gas washing for producing precipitated calcium carbonate Section and pipeline flushing section, the mesh filter, the centrifugal pump and the bag filter are sequentially arranged on the clean water pipeline from upstream to downstream along the clear water conveying direction of the paper machine. The filter is used to protect the centrifugal pump, and the centrifugal pump is used to pump the clean water of the paper machine, and the bag filter is used to filter the impurities in the clean water of the paper machine. The invention can achieve the following beneficial technical effects: the usage amount of clean water required for producing precipitated calcium carbonate can be reduced.
Description
技术领域technical field
本发明涉及用于利用纸机清白水生产沉淀碳酸钙的系统及方法。The present invention relates to a system and method for producing precipitated calcium carbonate from paper machine clean water.
背景技术Background technique
纸机系统需要大量的水以进行散浆等造纸生产作业。按照水的来源，纸机生产用水主要可分成三类：清水、白水和清白水。清水是纸机生产所使用的新鲜水，例如取自天然淡水域，进行初步泥沙去除后泵送到纸机的清水塔供使用。白水和清白水都是纸机循环水。白水是纸机生产过程中从网部脱下的水，经过弓形筛到白水槽，形成白水，然后泵送到纸机的白水塔供使用。清白水取自纸机的纤维和填料回收系统，泵送到纸机的清白水塔供使用。Paper machine systems require large amounts of water for paper production operations such as fluff pulp. According to the source of water, paper machine production water can be mainly divided into three categories: clear water, white water and clean water. Fresh water is the fresh water used in the production of the paper machine. For example, it is taken from natural fresh water. After preliminary sediment removal, it is pumped to the clean water tower of the paper machine for use. White water and clean water are both paper machine circulating water. White water is the water taken off from the wire part during the production process of the paper machine. It passes through the bow screen to the white water tank to form white water, and then is pumped to the white water tower of the paper machine for use. The clean water is taken from the fiber and filler recovery system of the paper machine, and is pumped to the clean water tower of the paper machine for use.
沉淀碳酸钙(PCC)主要用于纸张加填，提高成纸灰分，改善纸张性能，满足后续印刷及加工需要。在现有技术中，沉淀碳酸钙生产过程中需要使用大量清水(例如每天2000－4000吨，取决于沉淀碳酸钙的产量)，包括烟气洗涤、管路冲洗和消化工段等。Precipitated calcium carbonate (PCC) is mainly used for paper filling, increasing the ash content of the finished paper, improving the performance of the paper, and meeting the needs of subsequent printing and processing. In the prior art, a large amount of clean water (eg, 2,000-4,000 tons per day, depending on the output of precipitated calcium carbonate) needs to be used in the production of precipitated calcium carbonate, including flue gas scrubbing, pipeline flushing, and digestion sections.
因此，需要一种用于利用纸机清白水生产沉淀碳酸钙的系统及方法，其能降低生产沉淀碳酸钙所需的清水使用量。Therefore, there is a need for a system and method for producing precipitated calcium carbonate from paper machine clean water, which can reduce the amount of clean water used to produce precipitated calcium carbonate.
发明内容SUMMARY OF THE INVENTION
本发明的一个目的在于，提供一种用于利用纸机清白水生产沉淀碳酸钙的系统，其能解决现有技术所存在的问题，能降低生产沉淀碳酸钙所需的清水使用量。One object of the present invention is to provide a system for producing precipitated calcium carbonate by utilizing paper machine clean water, which can solve the problems existing in the prior art and can reduce the amount of clean water required for producing precipitated calcium carbonate.
本发明的以上目的通过一种用于利用纸机清白水生产沉淀碳酸钙的系统来实现，所述系统包括清白水管路、网式过滤器、离心泵和袋式过滤器，其中，所述清白水管路用于将纸机清白水输送至生产沉淀碳酸钙的消化工段、合成工段、烟气洗涤工段和管路冲洗工段，所述网式过滤器、所述离心泵和所述袋式过滤器沿着纸机清白水输送方向从上游至下游依次设置在所述清白水管路上，所述网式过滤器用于保护所述离心泵，所述离心泵用于泵送纸机清白水，所述袋式过滤器用于过滤纸机清白水中的杂质。The above object of the present invention is achieved by a system for producing precipitated calcium carbonate from paper machine clean water, the system comprising a clean water pipeline, a mesh filter, a centrifugal pump and a bag filter, wherein the clean water The water pipeline is used to transport the clean water of the paper machine to the digestion section, synthesis section, flue gas washing section and pipeline flushing section for producing precipitated calcium carbonate. The mesh filter, the centrifugal pump and the bag filter It is arranged on the clean water pipeline from upstream to downstream along the conveying direction of paper machine clean water, the mesh filter is used to protect the centrifugal pump, the centrifugal pump is used to pump the clean water of the paper machine, the bag The type filter is used to filter impurities in the clean water of the paper machine.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能降低生产沉淀碳酸钙所需的清水使用量。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can reduce the consumption of clean water required for producing precipitated calcium carbonate.
较佳的是，所述用于利用纸机清白水生产沉淀碳酸钙的系统还包括消泡剂引入管路，所述消泡剂引入管路用于在所述网式过滤器之前将消泡剂引入所述清白水管路中。Preferably, the system for producing precipitated calcium carbonate from paper machine clean water further comprises a defoaming agent introduction pipeline, which is used for defoaming before the mesh filter. The agent is introduced into the clean water pipeline.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能有效消除清白水管路内的清白水中的气泡，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: the air bubbles in the clean water in the clean water pipeline can be effectively eliminated, so that the paper machine clean water can be better Replaces the clean water required for the production of precipitated calcium carbonate.
较佳的是，所述用于利用纸机清白水生产沉淀碳酸钙的系统还包括流量计，所述流量计用于在所述袋式过滤器之后测量纸机清白水的流量。Preferably, the system for producing precipitated calcium carbonate from paper machine clean water further comprises a flow meter for measuring the flow rate of paper machine clean water after the bag filter.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能有效监测清白水管路内的清白水流量，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the system for producing precipitated calcium carbonate by using paper machine clean water of the present invention can achieve the following beneficial technical effects: the flow rate of clean water in the clean water pipeline can be effectively monitored, so that the paper machine clean water can better replace Clear water for the production of precipitated calcium carbonate.
较佳的是，所述管路冲洗工段包括振动筛冲洗子工段、螺旋输送机冲洗子工段、以及产品输送泵冲洗子工段。Preferably, the pipeline flushing section includes a vibrating screen flushing subsection, a screw conveyor flushing subsection, and a product delivery pump flushing subsection.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能有效利用过滤后的纸机清白水，将其输送到需要冲洗的子工段。According to the above technical scheme, the system for producing precipitated calcium carbonate using paper machine clean water of the present invention can achieve the following beneficial technical effects: the filtered paper machine clean water can be effectively used and transported to the sub-sections that need to be washed.
较佳的是，所述网式过滤器是金属网过滤器。Preferably, the mesh filter is a metal mesh filter.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能更好地初步过滤纸机清白水，保护离心泵。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can better initially filter paper machine clean water and protect the centrifugal pump.
本发明的以上目的还通过一种用于利用纸机清白水生产沉淀碳酸钙的方法来实现，所述方法包括利用清白水管路将纸机清白水输送至生产沉淀碳酸钙的消化工段、合成工段、烟气洗涤工段和管路冲洗工段，其中，网式过滤器、离心泵和袋式过滤器沿着纸机清白水输送方向从上游至下游依次设置在所述清白水管路上，所述网式过滤器用于保护所述离心泵，所述离心泵用于泵送纸机清白水，所述袋式过滤器用于过滤纸机清白水中的杂质。The above object of the present invention is also achieved by a method for utilizing paper machine clean water to produce precipitated calcium carbonate. , the flue gas washing section and the pipeline flushing section, wherein the mesh filter, centrifugal pump and bag filter are sequentially arranged on the clean water pipeline from upstream to downstream along the conveying direction of the clean water of the paper machine. The filter is used to protect the centrifugal pump, and the centrifugal pump is used to pump the clean water of the paper machine, and the bag filter is used to filter the impurities in the clean water of the paper machine.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能降低生产沉淀碳酸钙所需的清水使用量。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can reduce the amount of clean water used for producing precipitated calcium carbonate.
较佳的是，所述用于利用纸机清白水生产沉淀碳酸钙的方法还包括：在所述网式过滤器之前将消泡剂引入所述清白水管路中。Preferably, the method for producing precipitated calcium carbonate from paper machine clean water further comprises: introducing a defoamer into the clean water pipeline before the mesh filter.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能有效消除清白水管路内的清白水中的气泡，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the method for producing precipitated calcium carbonate by utilizing paper machine clean water of the present invention can achieve the following beneficial technical effects: it can effectively eliminate the bubbles in the clean water in the clean water pipeline, so that the paper machine clean water is better Replaces the clean water required for the production of precipitated calcium carbonate.
较佳的是，所述用于利用纸机清白水生产沉淀碳酸钙的方法还包括：在所述袋式过滤器之后测量纸机清白水的流量。Preferably, the method for producing precipitated calcium carbonate from paper machine clean water further comprises: measuring the flow rate of paper machine clean water after the bag filter.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能有效监测清白水管路内的清白水流量，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the method for producing precipitated calcium carbonate by using paper machine clean water of the present invention can achieve the following beneficial technical effects: the flow of clean water in the clean water pipeline can be effectively monitored, so that the paper machine clean water can better replace the Clear water for the production of precipitated calcium carbonate.
较佳的是，所述管路冲洗工段包括振动筛冲洗子工段、螺旋输送机冲洗子工段、以及产品输送泵冲洗子工段。Preferably, the pipeline flushing section includes a vibrating screen flushing subsection, a screw conveyor flushing subsection, and a product delivery pump flushing subsection.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能有效利用过滤后的纸机清白水，将其输送到需要冲洗的子工段。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: the filtered paper machine clean water can be effectively used and transported to the sub-sections that need to be rinsed.
较佳的是，所述网式过滤器是金属网过滤器。Preferably, the mesh filter is a metal mesh filter.
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能更好地初步过滤纸机清白水，保护离心泵。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can better initially filter paper machine clean water and protect the centrifugal pump.
附图说明Description of drawings
图1是本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的系统的组成示意图。FIG. 1 is a schematic composition diagram of a system for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention.
附图标记列表List of reference signs
101：清白水管路101: Clean water pipeline
102：网式过滤器102: Mesh filter
103：离心泵103: Centrifugal Pumps
104：袋式过滤器104: Bag filter
105：消泡剂引入管路105: Defoamer introduction pipeline
106：流量计106: Flowmeter
201：消化工段201: Digestion Section
202：合成工段202: Synthesis Section
203：烟气洗涤工段203: Flue gas scrubbing section
204：管路冲洗工段204: Pipeline flushing section
A：纸机清白水输送方向A: The conveying direction of the clear water of the paper machine
具体实施方式Detailed ways
以下将描述本发明的具体实施方式，需要指出的是，在这些实施方式的具体描述过程中，为了进行简明扼要的描述，本说明书不可能对实际的实施方式的所有特征均作详尽的描述。应当可以理解的是，在任意一种实施方式的实际实施过程中，正如在任意一个工程项目或者设计项目的过程中，为了实现开发者的具体目标，为了满足系统相关的或者商业相关的限制，常常会做出各种各样的具体决策，而这也会从一种实施方式到另一种实施方式之间发生改变。此外，还可以理解的是，虽然这种开发过程中所作出的努力可能是复杂并且冗长的，然而对于与本发明公开的内容相关的本领域的普通技术人员而言，在本公开揭露的技术内容的基础上进行的一些设计、制造或者生产等变更只是常规的技术手段，不应当理解为本公开的内容不充分。The specific embodiments of the present invention will be described below. It should be noted that, in the specific description of these embodiments, for the sake of brevity and conciseness, this specification may not describe all the features of the actual embodiments in detail. It should be understood that, in the actual implementation process of any embodiment, just as in the process of any engineering project or design project, in order to achieve the developer's specific goals, in order to meet the system-related or business-related constraints, Often a variety of specific decisions are made, which also vary from one implementation to another. Furthermore, it will also be appreciated that while such development efforts may be complex and tedious, for those of ordinary skill in the art to which this disclosure pertains, the techniques disclosed in this disclosure will Some changes in design, manufacture or production based on the content are just conventional technical means, and should not be construed that the content of the present disclosure is insufficient.
除非另作定义，权利要求书和说明书中使用的技术术语或者科学术语应当为本发明所属技术领域内具有一般技能的人士所理解的通常意义。本发明专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“一个”或者“一”等类似词语并不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现在“包括”或者“包含”前面的元件或者物件涵盖出现在“包括”或者“包含”后面列举的元件或者物件及其等同元件，并不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，也不限于是直接的还是间接的连接。Unless otherwise defined, technical or scientific terms used in the claims and the specification shall have the ordinary meaning as understood by those with ordinary skill in the technical field to which this invention belongs. The terms "first", "second" and similar terms used in the description of the patent application and the claims of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. "A" or "an" and the like do not denote a quantitative limitation, but rather denote the presence of at least one. Words like "including" or "comprising" mean that the elements or items appearing before "including" or "including" cover the elements or items listed after "including" or "including" and their equivalents, and do not exclude other components or objects. Words like "connected" or "connected" are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.
图1是本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的系统的组成示意图。FIG. 1 is a schematic composition diagram of a system for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention.
如图1所示，本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的系统包括清白水管路101、网式过滤器102、离心泵103和袋式过滤器104，其中，清白水管路101用于将纸机清白水输送至生产沉淀碳酸钙的消化工段201、合成工段202、烟气洗涤工段203和管路冲洗工段204，网式过滤器102、离心泵103和袋式过滤器104沿着纸机清白水输送方向A从上游至下游依次设置在清白水管路101上，网式过滤器102用于保护离心泵103，离心泵103用于泵送纸机清白水，袋式过滤器104用于过滤纸机清白水中的杂质。As shown in FIG. 1 , a system for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention includes a
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能降低生产沉淀碳酸钙所需的清水使用量。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can reduce the consumption of clean water required for producing precipitated calcium carbonate.
具体地说，发明人发现，纸机每天有大约1500m3的清白水需要排放到废水处理。这一部分清白水经过气浮处理，总悬浮物颗粒低于40ppm,有再利用的价值。因此，发明人设计了本发明的用于利用纸机清白水生产沉淀碳酸钙的系统，其通过两级过滤(网式过滤器102和袋式过滤器104)和离心泵送(离心泵103)，处理之后的清白水能够取代清水用于沉淀碳酸钙生产，将纸机清白水通过清白水管路101接入到沉淀碳酸钙的生产流程，用于消化工段201、合成工段202、烟气洗涤工段203和管路冲洗工段204，从而能降低生产沉淀碳酸钙所需的清水使用量，达到节能减排的目的。Specifically, the inventors found that the paper machine has about 1500m3 of clean water that needs to be discharged to waste water treatment every day. This part of the clean water has been treated by air flotation, and the total suspended solids particles are less than 40ppm, which has the value of reuse. Therefore, the inventors designed the system of the present invention for producing precipitated calcium carbonate from paper machine clean water, which is filtered by two stages (
例如，在沉淀碳酸钙生产过程清水用量为每天2000－4000吨(取决于沉淀碳酸钙的产量)的情况下，可用处理之后的清白水取代清水用于沉淀碳酸钙生产，大幅降低生产沉淀碳酸钙所需的清水使用量，例如清水用量仅为每天200吨，其余均可用处理之后的清白水取代。For example, when the amount of clean water in the production process of precipitated calcium carbonate is 2000-4000 tons per day (depending on the output of precipitated calcium carbonate), the treated clean water can be used instead of clean water for the production of precipitated calcium carbonate, which greatly reduces the production of precipitated calcium carbonate. The required amount of clean water, for example, the amount of clean water is only 200 tons per day, and the rest can be replaced with clean water after treatment.
较佳的是，消化工段201的用水主要包括消化反应用水、抽吸器喷淋水、搅拌机轴封水、含砂杂质螺旋输送机冲洗水等。Preferably, the water used in the
消化反应是指：生石灰与水反应生成熟石灰。Digestion reaction refers to: quicklime reacts with water to produce quicklime.
CaO+H2O＝Ca(OH)2 CaO+H 2 O=Ca(OH) 2
较佳的是，合成工段202的用水主要包括合成反应用水、合成后产品输送泵冲洗水等。Preferably, the water used in the
合成反应是指：将熟石灰与二氧化碳反应，生成碳酸钙。The synthesis reaction refers to the reaction of slaked lime with carbon dioxide to generate calcium carbonate.
Ca(OH)2+CO2＝CaCO3 Ca(OH) 2 +CO 2 =CaCO 3
较佳的是，烟气洗涤工段203中所进行的烟气洗涤是指：对来自电厂的含二氧化碳的排放尾气进行净化、除尘，得到清洁的二氧化碳用于合成反应。Preferably, the flue gas scrubbing performed in the flue
较佳的是，如图1所示，本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的系统还包括消泡剂引入管路105，消泡剂引入管路105用于在网式过滤器102之前将消泡剂引入清白水管路101中。Preferably, as shown in FIG. 1 , the system for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention further includes a
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能有效消除清白水管路内的清白水中的气泡，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: the air bubbles in the clean water in the clean water pipeline can be effectively eliminated, so that the paper machine clean water can be better Replaces the clean water required for the production of precipitated calcium carbonate.
较佳的是，消泡剂可采用醚类消泡剂。当然，本领域技术人员在本发明公开内容的基础上可以理解，醚类消泡剂是本发明所用消泡剂的一种较佳形式，消泡剂不局限于采用醚类消泡剂，也可采用其它类型的消泡剂(例如，非硅类消泡剂、有机硅类消泡剂等)，只要满足消泡要求即可，而不脱离本发明的保护范围。与其它类型的消泡剂相比，醚类消泡剂的消泡效果更好，从而能更好地满足沉淀碳酸钙的质量要求。Preferably, the defoaming agent can be an ether-based defoaming agent. Of course, those skilled in the art can understand on the basis of the disclosure of the present invention that the ether defoamer is a preferred form of the defoamer used in the present invention. The defoamer is not limited to the use of ether defoamer, but also Other types of defoaming agents (eg, non-silicon-based defoaming agents, silicone-based defoaming agents, etc.) can be used as long as the defoaming requirements are met, without departing from the scope of protection of the present invention. Compared with other types of defoamer, ether defoamer has better defoaming effect, so it can better meet the quality requirements of precipitated calcium carbonate.
较佳的是，如图1所示，本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的系统还包括流量计106，流量计106用于在袋式过滤器104之后测量纸机清白水的流量。Preferably, as shown in FIG. 1 , the system for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention further includes a
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能有效监测清白水管路内的清白水流量，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the system for producing precipitated calcium carbonate by using paper machine clean water of the present invention can achieve the following beneficial technical effects: the flow rate of clean water in the clean water pipeline can be effectively monitored, so that the paper machine clean water can better replace Clear water for the production of precipitated calcium carbonate.
较佳的是，管路冲洗工段204包括振动筛冲洗子工段、螺旋输送机冲洗子工段、以及产品输送泵冲洗子工段。Preferably, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能有效利用过滤后的纸机清白水，将其输送到需要冲洗的子工段。According to the above technical scheme, the system for producing precipitated calcium carbonate using paper machine clean water of the present invention can achieve the following beneficial technical effects: the filtered paper machine clean water can be effectively used and transported to the sub-sections that need to be washed.
振动筛用于合成反应后过滤产品杂质；螺旋输送机用于消化工段中含砂杂质的螺旋输送；产品输送泵用于合成工段中合成后产品(沉淀碳酸钙)的输送。The vibrating screen is used to filter product impurities after the synthesis reaction; the screw conveyor is used for the screw conveyance of sand-containing impurities in the digestion section; the product delivery pump is used to transport the synthesized product (precipitated calcium carbonate) in the synthesis section.
较佳的是，网式过滤器102是金属网过滤器。Preferably, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能更好地初步过滤纸机清白水，保护离心泵。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can better initially filter paper machine clean water and protect the centrifugal pump.
较佳的是，网式过滤器102的目数是40目。Preferably, the
较佳的是，袋式过滤器104是尼龙袋过滤器。Preferably, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能更好地进一步过滤纸机清白水，更有效地过滤纸机清白水中的杂质。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can further filter paper machine clean water and more effectively filter impurities in paper machine clean water. .
较佳的是，袋式过滤器104的目数是150目。Preferably, the mesh number of the
当然，本领域技术人员在本发明公开内容的基础上可以理解，网式过滤器不局限于金属网过滤器，袋式过滤器也不局限于尼龙袋过滤器，两者都可采用其它材料形式的过滤器，只要满足两级过滤的要求即可，而不脱离本发明的保护范围。Of course, those skilled in the art can understand on the basis of the disclosure of the present invention that the mesh filter is not limited to a metal mesh filter, and the bag filter is not limited to a nylon bag filter, both of which can be in the form of other materials. The filter, as long as it meets the requirements of two-stage filtration, does not deviate from the protection scope of the present invention.
另外，本领域技术人员在本发明公开内容的基础上可以理解，网式过滤器不局限于40目，袋式过滤器也不局限于150目，两者都可采用其它目数的过滤器，只要满足两级过滤的要求即可，而不脱离本发明的保护范围。In addition, those skilled in the art can understand on the basis of the disclosure of the present invention that the mesh filter is not limited to 40 meshes, and the bag filter is not limited to 150 meshes, both of which can use filters of other meshes. As long as the requirements of the two-stage filtration are met, it does not deviate from the protection scope of the present invention.
较佳的是，袋式过滤器104的目数是网式过滤器102的目数的3－5倍。Preferably, the mesh number of the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能更好地实现两级过滤，更有效地过滤纸机清白水中的杂质且保护离心泵。According to the above technical scheme, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: two-stage filtration can be better achieved, impurities in paper machine clean water can be filtered more effectively and the protection of centrifugal pump.
较佳的是，如图1所示，离心泵103是并联的两个离心泵。Preferably, as shown in FIG. 1 , the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能较好地泵送纸机清白水。According to the above technical solutions, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: the paper machine clean water can be pumped well.
当然，本领域技术人员在本发明公开内容的基础上可以理解，离心泵的数量不局限于两个，例如也可以是一个、三个等，而不脱离本发明的保护范围。Of course, those skilled in the art can understand on the basis of the disclosure of the present invention that the number of centrifugal pumps is not limited to two, for example, one or three, etc., without departing from the protection scope of the present invention.
较佳的是，如图1所示，袋式过滤器104是并联的四个袋式过滤器。Preferably, as shown in FIG. 1, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的系统能起到以下有益技术效果：能较好地过滤纸机清白水中的杂质。According to the above technical solutions, the system for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can better filter impurities in paper machine clean water.
当然，本领域技术人员在本发明公开内容的基础上可以理解，袋式过滤器的数量不局限于四个，例如也可以是三个、五个等，而不脱离本发明的保护范围。Of course, those skilled in the art can understand on the basis of the disclosure of the present invention that the number of bag filters is not limited to four, for example, three, five, etc., without departing from the protection scope of the present invention.
发明人还对过滤后纸机清白水和清水的水质以及所生产沉淀碳酸钙的特性进行了对照测试。测试结果见下表。The inventors also conducted comparative tests on the water quality of the paper machine clean water and clean water after filtration and the characteristics of the produced precipitated calcium carbonate. The test results are shown in the table below.
从上表的测试结果可以看出，本发明的系统能将纸机清白水处理(过滤)成水质与清水水质非常接近，可以有效地取代生产沉淀碳酸钙所需的清水；本发明的系统所生产的沉淀碳酸钙与清水生产的沉淀碳酸钙相比，沉淀碳酸钙特性非常接近，能有效地满足沉淀碳酸钙的质量要求。As can be seen from the test results in the above table, the system of the present invention can process (filter) the clean water of the paper machine into a water quality that is very close to the water quality of the clean water, and can effectively replace the clean water required for the production of precipitated calcium carbonate; Compared with the precipitated calcium carbonate produced by clear water, the precipitated calcium carbonate produced has very similar characteristics and can effectively meet the quality requirements of precipitated calcium carbonate.
本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的方法包括利用清白水管路101将纸机清白水输送至生产沉淀碳酸钙的消化工段201、合成工段202、烟气洗涤工段203和管路冲洗工段204，其中，网式过滤器102、离心泵103和袋式过滤器104沿着纸机清白水输送方向A从上游至下游依次设置在清白水管路101上，网式过滤器102用于保护离心泵103，离心泵103用于泵送纸机清白水，袋式过滤器104用于过滤纸机清白水中的杂质。The method for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention includes using
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能降低生产沉淀碳酸钙所需的清水使用量。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can reduce the amount of clean water used for producing precipitated calcium carbonate.
较佳的是，本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的方法还包括：在网式过滤器102之前将消泡剂引入清白水管路101中。Preferably, the method for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention further includes: introducing a defoamer into the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能有效消除清白水管路内的清白水中的气泡，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the method for producing precipitated calcium carbonate by utilizing paper machine clean water of the present invention can achieve the following beneficial technical effects: it can effectively eliminate the bubbles in the clean water in the clean water pipeline, so that the paper machine clean water is better Replaces the clean water required for the production of precipitated calcium carbonate.
较佳的是，本发明一实施例的用于利用纸机清白水生产沉淀碳酸钙的方法还包括：在袋式过滤器104之后测量纸机清白水的流量。Preferably, the method for producing precipitated calcium carbonate from paper machine clean water according to an embodiment of the present invention further includes: measuring the flow rate of paper machine clean water after the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能有效监测清白水管路内的清白水流量，使得纸机清白水更好地取代生产沉淀碳酸钙所需的清水。According to the above technical scheme, the method for producing precipitated calcium carbonate by using paper machine clean water of the present invention can achieve the following beneficial technical effects: the flow of clean water in the clean water pipeline can be effectively monitored, so that the paper machine clean water can better replace the Clear water for the production of precipitated calcium carbonate.
较佳的是，管路冲洗工段204包括振动筛冲洗子工段、螺旋输送机冲洗子工段、以及产品输送泵冲洗子工段。Preferably, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能有效利用过滤后的纸机清白水，将其输送到需要冲洗的子工段。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: the filtered paper machine clean water can be effectively used and transported to the sub-sections that need to be rinsed.
较佳的是，网式过滤器102是金属网过滤器。Preferably, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能更好地初步过滤纸机清白水，保护离心泵。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can better initially filter paper machine clean water and protect the centrifugal pump.
较佳的是，网式过滤器102的目数是40目。Preferably, the
较佳的是，袋式过滤器104是尼龙袋过滤器。Preferably, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能更好地进一步过滤纸机清白水，更有效地过滤纸机清白水中的杂质。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: it can further filter paper machine clean water and more effectively filter impurities in paper machine clean water. .
较佳的是，袋式过滤器104的目数是150目。Preferably, the mesh number of the
当然，本领域技术人员在本发明公开内容的基础上可以理解，网式过滤器不局限于金属网过滤器，袋式过滤器也不局限于尼龙袋过滤器，两者都可采用其它材料形式的过滤器，只要满足两级过滤的要求即可，而不脱离本发明的保护范围。Of course, those skilled in the art can understand on the basis of the disclosure of the present invention that the mesh filter is not limited to a metal mesh filter, and the bag filter is not limited to a nylon bag filter, both of which can be in the form of other materials. The filter, as long as it meets the requirements of two-stage filtration, does not deviate from the protection scope of the present invention.
另外，本领域技术人员在本发明公开内容的基础上可以理解，网式过滤器不局限于40目，袋式过滤器也不局限于150目，两者都可采用其它目数的过滤器，只要满足两级过滤的要求即可，而不脱离本发明的保护范围。In addition, those skilled in the art can understand on the basis of the disclosure of the present invention that the mesh filter is not limited to 40 meshes, and the bag filter is not limited to 150 meshes, both of which can use filters of other meshes. As long as the requirements of the two-stage filtration are met, it does not deviate from the protection scope of the present invention.
较佳的是，袋式过滤器104的目数是网式过滤器102的目数的3－5倍。Preferably, the mesh number of the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能更好地实现两级过滤，更有效地过滤纸机清白水中的杂质且保护离心泵。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: two-stage filtration can be better achieved, impurities in paper machine clean water can be filtered more effectively and the protection of centrifugal pump.
较佳的是，如图1所示，离心泵103是并联的两个离心泵。Preferably, as shown in FIG. 1 , the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能较好地泵送纸机清白水。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: the paper machine clean water can be better pumped.
当然，本领域技术人员在本发明公开内容的基础上可以理解，离心泵的数量不局限于两个，例如也可以是一个、三个等，而不脱离本发明的保护范围。Of course, those skilled in the art can understand on the basis of the disclosure of the present invention that the number of centrifugal pumps is not limited to two, for example, one or three, etc., without departing from the protection scope of the present invention.
较佳的是，如图1所示，袋式过滤器104是并联的四个袋式过滤器。Preferably, as shown in FIG. 1, the
根据上述技术方案，本发明的用于利用纸机清白水生产沉淀碳酸钙的方法能起到以下有益技术效果：能较好地过滤纸机清白水中的杂质。According to the above technical scheme, the method for producing precipitated calcium carbonate from paper machine clean water of the present invention can achieve the following beneficial technical effects: impurities in paper machine clean water can be better filtered.
当然，本领域技术人员在本发明公开内容的基础上可以理解，袋式过滤器的数量不局限于四个，例如也可以是三个、五个等，而不脱离本发明的保护范围。Of course, those skilled in the art can understand on the basis of the disclosure of the present invention that the number of bag filters is not limited to four, for example, three, five, etc., without departing from the protection scope of the present invention.
以上对本发明的具体实施方式进行了描述，但本领域技术人员将会理解，上述具体实施方式并不构成对本发明的限制，本领域技术人员可以在以上公开内容的基础上进行多种修改，而不超出本发明的范围。The specific embodiments of the present invention have been described above, but those skilled in the art will understand that the above-mentioned specific embodiments do not limit the present invention, and those skilled in the art can make various modifications on the basis of the above disclosure, and without departing from the scope of the present invention.
Claims (10)
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