技术领域technical field
本发明涉及制药企业和食品保健品行业的一种中药渣资源化利用方法，特别涉及中药渣高浓粗磨和中浓精磨的纯机械法联合制浆工艺。The invention relates to a resource utilization method of traditional Chinese medicine slag for pharmaceutical enterprises and food and health product industries, in particular to a purely mechanical combined pulping process of high-concentration coarse grinding and medium-concentration fine grinding of traditional Chinese medicine slag.
背景技术Background technique
随着国家对中医药事业的高度重视，中草药和中医药被广泛接受并作治疗的主要药物，医院和制药企业因此每天产生大量的中药渣，全国每年中药渣的排放量大约3000万吨。目前，国内绝大多数制药企业对中药渣的处理办法仍然是作为垃圾废弃物集中堆放，然后采取填埋或焚烧的方式处理。填埋不仅占用大量土地，产生大量有害恶心难闻气味，而且会污染地下水资源，焚烧则产生大量烟尘，二氧化碳等污染物，污染大气环境。As the country attaches great importance to the cause of traditional Chinese medicine, Chinese herbal medicine and traditional Chinese medicine are widely accepted and used as the main medicine for treatment. As a result, hospitals and pharmaceutical companies produce a large amount of traditional Chinese medicine dregs every day. The annual discharge of traditional Chinese medicine dregs in the country is about 30 million tons. At present, most of the domestic pharmaceutical companies still treat the dregs of traditional Chinese medicine by stacking them together as garbage and then disposing of them by landfill or incineration. Landfilling not only occupies a large amount of land, but also produces a large amount of harmful, disgusting and unpleasant odors, and pollutes groundwater resources. Incineration produces a large amount of soot, carbon dioxide and other pollutants, polluting the atmospheric environment.
中药渣资源化利用，在保护环境的同时也能为企业带来良好的经济效益。但利用中药渣也存在很多问题。由于中药渣来源的多样性，再利用时要充分考虑其安全性，需根据其所含成分、实际情况等因素确定开发利用途径，并防止二次污染。目前,目前我国中药渣资源化综合利用仅局限于农牧业领域，无法形成规模工业化的产业。因此，中药渣资源的开发研究都还有待于进一步深入与系统化，特别是中药渣的规模化与工业化研究开发。The resource utilization of traditional Chinese medicine dregs can bring good economic benefits to enterprises while protecting the environment. But there are also many problems in utilizing the dregs of traditional Chinese medicine. Due to the diversity of sources of traditional Chinese medicine dregs, its safety should be fully considered when reusing it. It is necessary to determine the development and utilization methods according to its ingredients, actual conditions and other factors, and to prevent secondary pollution. At present, the comprehensive utilization of traditional Chinese medicine residue resources in my country is limited to the field of agriculture and animal husbandry, and it is impossible to form a large-scale industrialized industry. Therefore, the research and development of traditional Chinese medicine dregs resources still need to be further deepened and systematized, especially the large-scale and industrialized research and development of traditional Chinese medicine dregs.
我国制浆造纸原料短缺，据海关统计，2011年仅广东口岸进口废纸1036万吨。随着废纸进口量不断提升，进口废纸等级降低，在进口废纸中夹带生活垃圾、医疗垃圾，各种有害生物进境的情况时有发生，对人民身体健康和生态环境造成严重危害。中药渣既是医药加工企业生产中草药过程中产生的主要固体废物，同时也是中国特有的植物纤维资源，是制浆造纸工业原材料。中药渣是中药材经过水或有机溶剂萃取后所剩下的残渣，其成分主要为纤维素、半纤维素和木素，由于中药材一般为草本植物，由于受化学制浆工艺与装备的限制，中药渣资源的多样性与复杂性及中药渣所含纤维短小、杂细胞多与色素重的影响，中药渣制浆一直是造纸工作者回避的课题。There is a shortage of raw materials for pulp and paper making in my country. According to customs statistics, only Guangdong ports imported 10.36 million tons of waste paper in 2011. With the continuous increase in the import volume of waste paper, the grade of imported waste paper is lowered, domestic waste and medical waste are entrained in imported waste paper, and various harmful organisms enter the country from time to time, causing serious harm to people's health and the ecological environment. Traditional Chinese medicine residue is not only the main solid waste produced in the process of producing Chinese herbal medicine by pharmaceutical processing enterprises, but also a unique plant fiber resource in China, and is a raw material for the pulp and paper industry. Traditional Chinese medicine residue is the residue left after Chinese medicinal materials are extracted with water or organic solvents. , The diversity and complexity of traditional Chinese medicine dregs resources and the impact of short fibers, many miscellaneous cells and heavy pigments in Chinese medicine dregs, pulping of traditional Chinese medicine dregs has always been a topic that papermakers have avoided.
因此，如何突破现有的化学制浆工艺与装备缺陷，发明一种纯机械的制浆方法，将中药渣制备成物理强度合格纸浆，既可减少中药渣填埋、焚烧造成的环境污染，同时也可用中药渣制浆替代部分进口废纸制备包装材料，减低进口废纸所带来的环境压力，对于解决好经济发展与生态环境间的矛盾，实现可持续发展具有重要意义。Therefore, how to break through the existing chemical pulping process and equipment defects, invent a purely mechanical pulping method, and prepare traditional Chinese medicine dregs into pulp with qualified physical strength, which can reduce the environmental pollution caused by landfill and incineration of traditional Chinese medicine dregs, and at the same time It can also be used to replace some imported waste paper to prepare packaging materials by pulping traditional Chinese medicine residue, so as to reduce the environmental pressure brought by imported waste paper, which is of great significance for solving the contradiction between economic development and ecological environment and realizing sustainable development.
发明内容Contents of the invention
为实现对中药渣资源工业化的循环利用，既减少中药渣填埋、焚烧造成的环境污染，同时为制浆造纸行业提供生产原料，减低进口废纸所带来的环境压力，对于解决好经济发展与生态环境间的矛盾，本发明提供一种中药渣资源化利用方法，即一种中药渣的纯机械制浆工艺方法。In order to realize the industrialized recycling of traditional Chinese medicine residue resources, it not only reduces the environmental pollution caused by landfill and incineration of traditional Chinese medicine residue, but also provides production raw materials for the pulp and paper industry and reduces the environmental pressure brought by imported waste paper. In order to avoid the contradiction with the ecological environment, the present invention provides a resource utilization method of traditional Chinese medicine dregs, that is, a purely mechanical pulping process of traditional Chinese medicine dregs.
本发明通过以下技术方案实现：中药材经过水或有机溶剂萃取后形成中药渣，将中药渣加入水中经过均质处理后以25%-30%的质量分数，进入双螺杆搓丝机进行搓磨处理，双螺杆搓丝机处理后的粗料均匀送入第一高浓磨浆机前的螺旋输料器中，由此螺旋输料器送进入第一高浓磨浆机内进行第一次高浓粗磨，经第一高浓磨浆机处理后浆料再由螺旋输料器再送入第二高浓磨浆机进行第二次高浓粗磨处理,经第二次高浓粗磨后浆料由螺旋输料器送入稀释浆池内，并在稀释浆池内调节浆料的质量分数至10%-15%，浓度调节过程使用两个稀释浆池交替进浆，以提高效率。浆料再由中浓抽浆泵输送至第一中浓磨浆机进行第一次中浓精磨处理，经第一中浓磨浆机精磨后的产物直接进入第二中浓磨浆机进行第二次中浓精磨处理，第二次中浓精磨后产物经中浓压力筛筛选后的良浆浓缩得到成品浆。成品浆可用于制备瓦楞原纸的合格商品浆或纸浆模塑制品包装材料。The present invention is realized through the following technical solutions: Chinese medicinal materials are extracted with water or an organic solvent to form traditional Chinese medicine dregs, and the Chinese medicinal dregs are added into water and subjected to homogenization treatment, and then entered into a twin-screw thread rolling machine for rubbing with a mass fraction of 25%-30% Processing, the coarse material processed by the twin-screw thread rolling machine is evenly sent to the screw conveyor in front of the first high-consistency refiner, and then the screw conveyor is sent into the first high-consistency refiner for the first time High-consistency coarse grinding, after being processed by the first high-consistency refiner, the slurry is sent to the second high-consistency refiner by the screw conveyor for the second high-consistency coarse grinding treatment, after the second high-consistency coarse grinding The final slurry is sent into the diluted stock tank by the screw conveyor, and the mass fraction of the slurry is adjusted to 10%-15% in the diluted stock tank. During the concentration adjustment process, two diluted stock tanks are used to feed stock alternately to improve efficiency. The slurry is then transported to the first medium-consistency refiner by the medium-consistency pump for the first medium-consistency refining treatment, and the product refined by the first medium-consistency refiner directly enters the second medium-consistency refiner The second medium-consistency refining treatment is carried out, and the product after the second medium-consistency refining is concentrated through the fine pulp screened by the medium-consistency pressure sieve to obtain the finished pulp. The finished pulp can be used to prepare qualified commercial pulp for corrugated base paper or packaging materials for pulp molded products.
上述方法中，所述中药渣是中药材经过水或有机溶剂萃取后产生的纤维含量质量分数大于10%的中药渣；所述中药材包括厚朴、广霍香、菊花、荆芥、防风、当归、独活、白芷、川芎、牡丹皮、前胡、连翘、丹参或穿心莲中的一种以上。In the above method, the Chinese medicine dregs are the Chinese medicine dregs with a fiber content mass fraction greater than 10% after the Chinese medicinal materials are extracted by water or an organic solvent; , Duhuo, Angelica dahurica, Chuanxiong, Moutan bark, Peucedanum, Forsythia, Danshen or Andrographis paniculata.
上述方法具体为：将厚朴、广霍香、菊花、荆芥、防风、当归、独活、白芷、川芎、牡丹皮、前胡、连翘、丹参和穿心莲组成的中药材经过有机溶剂乙醇萃取后提取挥发性活性成分生产中药配方颗粒形成的中药渣，在中药渣加入水,经搅拌机均质处理后，以25-30%的质量分数通过皮带输送机进入双螺杆搓丝机进行搓磨处理，双螺杆搓丝机处理后的粗料均匀送入第一高浓磨浆机前的螺旋输料器中，由此螺旋输料器送入第一高浓磨浆机内进行第一次高浓粗磨,经第一高浓磨浆机处理后浆料再由螺旋输料器再送入第二高浓磨浆机进行第二次高浓粗磨处理，经过第二次高浓粗磨处理后的浆料再由螺旋输料器送入第一稀释浆池或第二稀释浆池内，调节浆料浓度至10-15%质量分数后由中浓抽浆泵输送至第一中浓磨浆机进行第一次中浓精磨，经第一中浓磨浆机精磨后的产物直接进入第二中浓磨浆机进行第二次中浓精磨处理后产物经过中浓压力筛筛选后良浆浓缩即可得到叩解度为30～40°SR，纤维湿重2.5～3.5g成浆，可直接用于制备瓦楞原纸或纸浆模塑制品等包装材料。The above method is specifically as follows: the traditional Chinese medicinal materials composed of Magnolia Bark, Patchouli, Chrysanthemum, Schizonepeta, Fangfeng, Angelica, Duhuo, Angelica, Chuanxiong, Moutan, Peucedanum, Forsythia, Salvia and Andrographis are extracted by organic solvent ethanol extraction. Volatile active ingredients produce traditional Chinese medicine slag formed by traditional Chinese medicine formula granules. Add water to the traditional Chinese medicine slag. After homogenization treatment by a mixer, it enters a twin-screw thread rolling machine through a belt conveyor with a mass fraction of 25-30% for rubbing treatment. The coarse material processed by the screw thread rolling machine is evenly sent to the screw conveyor in front of the first high-consistency refiner, and then the screw conveyor is sent to the first high-consistency refiner for the first high-consistency refiner. After being processed by the first high-consistency refiner, the slurry is sent to the second high-consistency refiner by the screw conveyor for the second high-consistency coarse grinding treatment. The pulp is sent into the first diluted pulp tank or the second diluted pulp tank by the screw conveyor, and the pulp concentration is adjusted to 10-15% mass fraction, and then it is transported to the first medium-consistency refiner by the medium-consistency pulping pump. The first medium-consistency refining, the product refined by the first medium-consistency refiner directly enters the second medium-consistency refiner for the second medium-consistency refining treatment, and the product is screened by medium-consistency pressure sieve to obtain fine pulp It can be concentrated to obtain a pulp with a percussion degree of 30-40°SR and a fiber wet weight of 2.5-3.5g, which can be directly used to prepare packaging materials such as corrugated base paper or pulp molded products.
与现有中药渣资源化利用方法相比，本发明有如下优点：Compared with the existing resource utilization method of traditional Chinese medicine dregs, the present invention has the following advantages:
⑴可实现中药渣的规模化与工业化利用；(1) Large-scale and industrial utilization of traditional Chinese medicine residues can be realized;
⑵节能：充分利用中药材萃取后的余热，进行搓丝与高浓热磨，中浓磨浆等机械法制浆(节水、节电)；⑵Energy saving: make full use of the waste heat after the extraction of Chinese herbal medicines, and carry out mechanical pulping such as silk rolling, high-consistency thermal grinding, medium-consistency refining (water saving, power saving);
⑶环保：制药企业中药渣可做到日产日清，同时突破化学制浆产生污染缺陷，可避免中药渣制浆的二次污染；⑶Environmental protection: The traditional Chinese medicine dregs in pharmaceutical companies can be produced daily, and at the same time break through the pollution defects caused by chemical pulping, which can avoid the secondary pollution of traditional Chinese medicine dregs pulping;
⑷经济：中药渣作为制浆造纸原料用于制备瓦楞原纸或纸浆模塑制品可产生较好的经济效益。⑷Economy: Traditional Chinese medicine dregs are used as raw materials for pulping and papermaking to produce corrugated base paper or pulp molded products, which can produce better economic benefits.
附图说明Description of drawings
图1是一种中药渣高浓粗磨和中浓精磨的纯机械法联合制浆工艺示意图，其中1是螺旋输料器，2是第一高浓磨浆机,3是第二高浓磨浆机,4是第一稀释浆池（40m3），5是第二稀释浆池（40m3），6是中浓抽浆泵,7是第一中浓磨浆机,8是第二中浓磨浆机。Figure 1 is a schematic diagram of a purely mechanical combined pulping process of high-consistency coarse grinding and medium-consistency fine grinding of traditional Chinese medicine residue, in which 1 is a screw conveyor, 2 is the first high-consistency refiner, and 3 is the second high-consistency Refiner, 4 is the first dilution tank (40m3 ), 5 is the second dilution tank (40m3 ), 6 is the medium-consistency pump, 7 is the first medium-consistency refiner, 8 is the second Medium consistency refiner.
具体实施方式detailed description
本发明的两种应用工艺流程如下：Two kinds of application process flow of the present invention are as follows:
①中药渣机械制浆制备纸浆模塑制品工艺流程① Process flow of mechanical pulping of traditional Chinese medicine residues to prepare pulp molded products
中药渣→均质处理→皮带输送机→双螺杆搓丝机→螺旋输料器→高浓磨浆机→螺旋输料器→稀释浆池→中浓抽浆泵→中浓磨浆机→压力筛→成浆→纸浆模塑全自动机→纸浆模塑制品（包装材料）；Traditional Chinese medicine residue→homogeneous treatment→belt conveyor→twin-screw thread rolling machine→screw conveyor→high consistency refiner→screw conveyor→dilute pulp pool→medium consistency pump→medium consistency refiner→pressure Screening → pulping → automatic pulp molding machine → pulp molding products (packaging materials);
②中药渣机械制浆制备瓦楞原纸工艺流程②Mechanical pulping of traditional Chinese medicine residues to prepare corrugated base paper process
中药渣→均质处理→皮带输送机→双螺杆搓丝机→螺旋输料器→高浓磨浆机→螺旋输料器→稀释浆池→中浓抽浆泵→中浓磨浆机→压力筛→成浆→瓦楞纸机→瓦楞原纸（包装材料）。Traditional Chinese medicine residue→homogeneous treatment→belt conveyor→twin-screw thread rolling machine→screw conveyor→high consistency refiner→screw conveyor→dilute pulp pool→medium consistency pump→medium consistency refiner→pressure Screening → Pulping → Corrugating machine → Corrugated base paper (packaging material).
下面再结合实施例及附图对本发明做进一步的详细说明，但本发明的实施和保护不限于此。The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the implementation and protection of the present invention are not limited thereto.
实施例1Example 1
本实施例一种中药渣资源化利用方法，即一种中药渣高浓粗磨和中浓精磨的纯机械联合制浆工艺方法。如图1所示，将厚朴、广霍香、菊花、荆芥、防风、当归、独活、白芷、川芎、牡丹皮、前胡、连翘、丹参和穿心莲组成的中药材经过有机溶剂乙醇萃取后提取挥发性活性成分生产中药配方颗粒形成的中药渣，在中药渣加入水,经搅拌机均质处理后，以25%的质量分数通过皮带输送机进入双螺杆搓丝机进行搓磨处理，双螺杆搓丝机处理后的粗料均匀送入第一高浓磨浆机2前的螺旋输料器1中，由此螺旋输料器1送入第一高浓磨浆机内2进行第一次高浓粗磨,经第一高浓磨浆机2处理后浆料再由螺旋输料器1再送入第二高浓磨浆机3进行第二次高浓粗磨处理，经过第二次高浓粗磨处理后的浆料再由螺旋输料器1送入第一稀释浆池（40m3）4或第二稀释浆池（40m3）5内，调节浆料浓度至10%质量分数后由中浓抽浆泵6输送至第一中浓磨浆机7进行第一次中浓精磨，经第一中浓磨浆机7精磨后的产物直接进入第二中浓磨浆机8进行第二次中浓精磨处理后产物经过中浓压力筛筛选后良浆浓缩即可得到叩解度为30°SR，纤维湿重2.5g成浆，可直接用于制备瓦楞原纸或纸浆模塑制品等包装材料。This embodiment is a resource utilization method of traditional Chinese medicine dregs, that is, a purely mechanical combined pulping process of high-consistency coarse grinding and medium-consistency fine grinding of traditional Chinese medicine dregs. As shown in Figure 1, Chinese medicinal materials composed of Magnolia bark, Patchouli, Chrysanthemum, Schizonepeta, Fangfeng, Angelica, Duhuo, Angelica dahurica, Chuanxiong, Moutan bark, Peucedanum, Forsythia, Salvia and Andrographis paniculata were extracted with organic solvent ethanol Extract volatile active ingredients to produce traditional Chinese medicine slag formed by traditional Chinese medicine formula granules, add water to the traditional Chinese medicine slag, after homogenization treatment by a mixer, enter the twin-screw thread rolling machine through the belt conveyor with a mass fraction of 25% for rubbing treatment, the twin-screw The coarse material processed by the thread rolling machine is evenly sent to the screw feeder 1 in front of the first high-consistency refiner 2, and the screw feeder 1 is sent into the first high-consistency refiner 2 for the first time High-consistency coarse grinding, after being processed by the first high-consistency refiner 2, the slurry is sent to the second high-consistency refiner 3 by the screw conveyor 1 for the second high-consistency coarse grinding treatment. The thickened and coarsely ground slurry is sent to the first diluted slurry tank (40m3 ) 4 or the second diluted slurry tank (40m3 ) 5 by the screw conveyor 1, after adjusting the slurry concentration to 10% mass fraction The medium-consistency pulping pump 6 transports it to the first medium-consistency refiner 7 for the first medium-consistency refiner, and the product refined by the first medium-consistency refiner 7 directly enters the second medium-consistency refiner 8 After the second medium-consistency fine grinding treatment, the product is screened by a medium-consistency pressure sieve, and the good pulp can be concentrated to obtain a pulp with a percussion degree of 30°SR and a wet fiber weight of 2.5g, which can be directly used to prepare corrugated base paper or pulp molding. Products and other packaging materials.
实施例2Example 2
将厚朴、广霍香、菊花、荆芥、防风、当归、独活、白芷、川芎、牡丹皮、前胡、连翘、丹参和穿心莲组成的中药材经过有机溶剂乙醇萃取后提取挥发性活性成分生产中药配方颗粒形成的中药渣，在中药渣加入水,经搅拌机均质处理后，以27%的质量分数通过皮带输送机进入双螺杆搓丝机进行搓磨处理，双螺杆搓丝机处理后的粗料均匀送入第一高浓磨浆机2前的螺旋输料器1中，由此螺旋输料器1送入第一高浓磨浆机内2进行第一次高浓粗磨,经第一高浓磨浆机2处理后浆料再由螺旋输料器1再送入第二高浓磨浆机3进行第二次高浓粗磨处理，经过第二次高浓粗磨处理后的浆料再由螺旋输料器1送入第一稀释浆池（40m3）4或第二稀释浆池（40m3）5内，调节浆料浓度至13%质量分数后由中浓抽浆泵6输送至第一中浓磨浆机7进行第一次中浓精磨，经第一中浓磨浆机7精磨后的产物直接进入第二中浓磨浆机8进行第二次中浓精磨处理后产物经过中浓压力筛筛选后良浆浓缩即可得到叩解度为35°SR，纤维湿重3.1g成浆，可直接用于制备瓦楞原纸或纸浆模塑制品等包装材料。Extract the volatile active ingredients from the traditional Chinese medicinal materials composed of Magnolia Bark, Patchouli, Chrysanthemum, Nepeta, Fangfeng, Angelica, Duhuo, Baizhi, Chuanxiong, Moutan, Peucedanum, Forsythia, Salvia and Andrographis paniculata through organic solvent ethanol extraction. The traditional Chinese medicine slag formed by the traditional Chinese medicine formula granules is added with water to the traditional Chinese medicine slag, and after being homogenized by the mixer, it enters the twin-screw thread rolling machine through the belt conveyor with a mass fraction of 27% for rubbing treatment. Coarse material is uniformly fed into the screw feeder 1 before the first high-consistency refiner 2, and then the screw feeder 1 is fed into the first high-consistency refiner 2 for the first high-consistency coarse grinding. After being processed by the first high-consistency refiner 2, the slurry is sent to the second high-consistency refiner 3 by the screw conveyor 1 for the second high-consistency coarse grinding treatment. The slurry is then sent to the first diluted slurry tank (40m3 ) 4 or the second diluted slurry tank (40m3 ) 5 by the screw conveyor 1, and the slurry is adjusted to 13% mass fraction by a medium-consistency slurry pump 6. Transport to the first medium-consistency refiner 7 for the first medium-consistency refining, and the product refined by the first medium-consistency refiner 7 directly enters the second medium-consistency refiner 8 for the second medium-consistency After fine grinding, the product is screened by a medium-consistency pressure sieve, and the good pulp is concentrated to obtain a pulp with a percussion degree of 35°SR and a wet fiber weight of 3.1g, which can be directly used to prepare packaging materials such as corrugated base paper or pulp molded products.
实施例3Example 3
将厚朴、广霍香、菊花、荆芥、防风、当归、独活、白芷、川芎、牡丹皮、前胡、连翘、丹参和穿心莲组成的中药材经过有机溶剂乙醇萃取后提取挥发性活性成分生产中药配方颗粒形成的中药渣，在中药渣加入水,经搅拌机均质处理后，以30%的质量分数通过皮带输送机进入双螺杆搓丝机进行搓磨处理，双螺杆搓丝机处理后的粗料均匀送入第一高浓磨浆机2前的螺旋输料器1中，由此螺旋输料器1送入第一高浓磨浆机内2进行第一次高浓粗磨,经第一高浓磨浆机2处理后浆料再由螺旋输料器1再送入第二高浓磨浆机3进行第二次高浓粗磨处理，经过第二次高浓粗磨处理后的浆料再由螺旋输料器1送入第一稀释浆池（40m3）4或第二稀释浆池（40m3）5内，调节浆料浓度至15%质量分数后由中浓抽浆泵6输送至第一中浓磨浆机7进行第一次中浓精磨，经第一中浓磨浆机7精磨后的产物直接进入第二中浓磨浆机8进行第二次中浓精磨处理后产物经过中浓压力筛筛选后良浆浓缩即可得到叩解度为40°SR，纤维湿重3.5g成浆，可直接用于制备瓦楞原纸或纸浆模塑制品等包装材料。Extract the volatile active ingredients from the traditional Chinese medicinal materials composed of Magnolia Bark, Patchouli, Chrysanthemum, Nepeta, Fangfeng, Angelica, Duhuo, Baizhi, Chuanxiong, Moutan, Peucedanum, Forsythia, Salvia and Andrographis paniculata through organic solvent ethanol extraction. The traditional Chinese medicine slag formed by the traditional Chinese medicine formula granules is added with water to the traditional Chinese medicine slag, and after being homogenized by the mixer, it enters the twin-screw thread rolling machine through the belt conveyor with a mass fraction of 30% for rubbing treatment. Coarse material is uniformly fed into the screw feeder 1 before the first high-consistency refiner 2, and then the screw feeder 1 is fed into the first high-consistency refiner 2 for the first high-consistency coarse grinding. After being processed by the first high-consistency refiner 2, the slurry is sent to the second high-consistency refiner 3 by the screw conveyor 1 for the second high-consistency coarse grinding treatment. The slurry is then sent into the first diluted slurry tank (40m3 ) 4 or the second diluted slurry tank (40m3 ) 5 by the screw conveyor 1, and the slurry is adjusted to 15% mass fraction by a medium-consistency slurry pump 6. Transport to the first medium-consistency refiner 7 for the first medium-consistency refining, and the product refined by the first medium-consistency refiner 7 directly enters the second medium-consistency refiner 8 for the second medium-consistency After fine grinding, the product is screened by a medium-consistency pressure sieve, and the good pulp is concentrated to obtain a pulp with a percussion degree of 40°SR and a wet fiber weight of 3.5g, which can be directly used to prepare packaging materials such as corrugated base paper or pulp molded products.
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