Experimental Study on a Medium Consistency Pump

D., X.; Li, Z. F.; Yu, He; Wu, Dazhuan; Wang, L. Q.

doi:10.1115/1.4024865

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…HF Zhuang, 12 in 2012, investigated the effects of different speeds and vacuum pressure on the consistency pulp performance, and the result showed that increase in the pump speed and the degree of vacuum can improve MC pump performance. In 2014, XD Ma 13,14 analyzed the hydraulic structure of MC pump and built-in pump performance test platform to study the change in different pulp concentrations, the impeller exit width, and degree of vacuum in the operating characteristics of pump. However, there is lack of relevant consistency pulp pump design theory.…”

Section: Introductionmentioning

confidence: 99%

Study on performance characteristic of medium consistency pump

2017

Advances in Mechanical Engineering

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The aim of this work is to study the operation and performance characteristics of medium consistency pump in different conditions, and a sonar flowmeter and monitoring system are used in the experimental set up. The head, efficiency, gas fraction, and max flow rate were studied under different pulp concentrations 7.52%, 9.3%, and 12.1%; at speeds 960, 1140, and 1500 r/min; and degas vacuum degree. The dimensionless analysis is applied to pulp pumping. The experimental results show that pump head and efficiency decrease with the increase in the pulp concentration at constant flow rate. Vacuum degree has significant effect on pump performance. Medium consistency pump can pump pulp concentration at 7.52% without vacuum, but pump head and efficiency decrease obviously with the increase in the flow rate. With increase in vacuum degree, pump head increases and gas fraction decreases at pump outlet. Head increases with the increase in rotation speed. The higher rotation speed leads to the lower vacuum degree, which indicates that enhancing speed improves gas-liquid separation. With the increase in concentration of the gas fraction, the degas vacuum degree increases. The max flow rate decreases with the increase in concentration and increases with the increase in rotation speed.

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Section: Introductionmentioning

confidence: 99%

Study on performance characteristic of medium consistency pump

2017

Advances in Mechanical Engineering

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“…Medium-consistency (MC) technology was first developed in Northern Europe in 1970s. 1,2 Then, it was widely used to pump, stock, beat, bleach, and filter pulp suspensions at medium concentration with its advantages of high energy efficiency and low environmental effects. MC pump is an important piece of equipment in the MC pumping process.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of degas performance on impeller of medium-consistency pump

Zou

et al. 2015

Advances in Mechanical Engineering

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Medium-consistency technology is known as the process with high efficiency and low pollution. The gas distribution was simulated in the medium-consistency pump with different degas hole positions. Rheological behaviors of pulp suspension were obtained by experimental test. A modified Herschel-Bulkley model and the Eulerian gas-liquid two-phase flow model were utilized to approximately represent the behaviors of the medium-consistency pulp suspension. The results show that when the relative position is 0.53, the gas volume ratio is less than 0.1% at the pump outlet and 9.8% at the vacuum inlet, and the pump head is at the maximum. Because of the different numbers of the impeller blades and turbulence blades and the asymmetric volute structure, the gas is distributed unevenly in the impeller. In addition, the pump performance was tested in experiment and the results are used to validate computational fluid dynamics outcomes.

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Effect of turbulence generator structures to the performance of medium-consistency pump at high rotation speed excesses 2000 rpm

Kuang

Li²,

et al. 2020

Nordic Pulp &Amp; Paper Research Journal

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The medium-consistency (MC) pump is the key unit in modern pulp and paper industry, especially in medium-consistency bleaching plant. Use of MC pump improves the efficiency of bleaching sequences and reduces the pollution load of bleaching effluents. In this work, the component of MC pump, e. g. turbulence generators with three typical structures were studied to evaluate the effects of turbulence generator structure on the performance of MC pump. An automatic control system was built to control operation condition and to collect data online. Head and efficiency were calculated to evaluate the differences among three turbulence generators. The results showed that the linear-type, twist-type and screw-type turbulence generators exhibited similar performance (pump head and efficiency) of MC pump at high rotation speed (2000 rpm to 2900 rpm) compared to the well-known performance of MC pump at rotation speed lower than 2000 rpm which are significant different for the three turbulence generators.

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Experimental Study on a Medium Consistency Pump

Cited by 5 publications

References 11 publications

Study on performance characteristic of medium consistency pump

Study on performance characteristic of medium consistency pump

Numerical investigation of degas performance on impeller of medium-consistency pump

Effect of turbulence generator structures to the performance of medium-consistency pump at high rotation speed excesses 2000 rpm

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