| 蔡 慧,李金苗,沙九龙,张 辉.高浓锥形除渣器中废纸浆特性与浆杂分离阻力间的影响关系[J].中国造纸学报,2016,31(1):20-26 |
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| 高浓锥形除渣器中废纸浆特性与浆杂分离阻力间的影响关系 |
| Relationship between Characteristics of Recycled Pulp and Separating Resistance of Impurity in a High Consistency Conical Cleaner |
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| DOI：10.11981/j.issn.1000-6842.2016.01.20 |
| 中文关键词: 废纸浆 高浓锥形除渣器 纸浆特性 杂质特性 分离阻力 阻力系数 |
| Key Words:waste paper pulp high consistency conical cleaner pulp characteristics impurity characteristics separation drag coefficient |
| 基金项目:南京林业大学江苏省制浆造纸科学与技术重点实验室开放基金(201522)；江苏高校优势学科建设工程资助项目(PAPD)。 |
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| 中文摘要: |
| 占比日益增加的废纸制浆必须配备高浓锥形除渣器,杂质与浆料纤维间的分离阻力是影响其高效净化的重要因素。针对研发出的新型导流式高浓锥形除渣器,首先，研究了旧箱纸板(OCC)浆、旧报纸(ONP)浆、竹浆和玉米秸秆浆的纤维性能以及废纸浆中主要重杂质（如玻璃和金属类杂质）的基本特性；其次,分析了浆料和杂质特性对浆杂分离的影响；最后，建立相关数学模型,分析了流体阻力和阻力系数。结果表明，相对黏度大、打浆度低、浆浓高的浆料分离阻力较大；ONP浆中的浆杂比OCC浆中的更易分离；相同分离条件下,杂质颗粒直径越大,其流体阻力也越大,在分离过程中密度大的杂质所受浆杂分离动力和阻力同步增大；流体阻力Fz和阻力系数CD数学模型分别为Fz=CDAρfu22和CD=4πdg3u2(ρ/ρf-1)。 |
| Abstract: |
| High consistency conical cleaner is necessary for increasing production of recycled pulp, and separating resistance between impurities and fibers is an important factor for its efficient purification. Based on the invention patent of the new flow-oriented high consistency conical cleaner, firstly, the basic characteristics of OCC pulp, ONP pulp, bamboo pulp, corn straw pulp and two main types of impurities were studied; secondly, the impacts of the characteristics of the pulps and impurities on separating resistance were discussed; the relevant mathematical models to analysis fluid resistance and resistance coefficient were established. It was found that the separating resistance was larger in pulp suspensions with high viscosity, low beating degree and high consistency; the impurities of ONP pulp were easier to be separated than those of OCC pulp; under the same separation conditions, the bigger the diameter of the impurity, the greater the fluid resistance, and both of separating power and resistance increased with the increase of the density of impurities in the separation process; and mathematical model of fluid resistance Fz and drag coefficient CD could be expressed respectively as the formulas: Fz=CDAρfu22 and CD=4πdg3u2(ρ/ρf-1). |
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