ZCE系列纸浆脱气器/ ZCE Series Pulp Deaerator
用 途 :
浆料冲击到脱气器的顶部， 打碎浆料中的纤维束，使 粘附在纤维上的气泡脱离。脱气器的内表面，可以防 止任何结垢出现。
Manufactured under the license of Andritze-Ahlstrom,ZCE series deaerator is a kind of key equipment for the flow approach system in modern paper machine. The equipment is arranged between the cleaner and low-pulse paper machine screen for separating and Removing 100% air in pulp. It eliminates pulp's fluctuations of pressure, flow or consistency before the pulp goes into the headbox so that pulp's stability will be kept in favor of sheet formation and quality stability.
Realizing complete deaeration of the pulp onto the wire by physical actions such as jet flow and falling film, hydraulic impact on surface, vacuum and dwell time etc.
Realizing the stability of the consistency as well as flow and pressure of the pulp which enters the head box so that paper's basis weight varies little and paper quality will be significantly improved.
Preventing slime pulp from producing, preventing foaming, reducing the accumulation of dirty materials so as to improve the dewatering of wire end and get better paper formation.Structure Principles
ZCE series deaerator consists of pulp-feeding jet manifold, nozzles with high rotational velocity and low pressure-drop, overflow slice and deaerator's body etc.
Mounted in the flow approach system of a paper machine, ZCE series deaerator feeds the stock which comes from the cleaner into
the pulp-feeding manifold by pressure and then goes through the nozzles with high rotational velocity, the stock is jetted intensively onto the roof of the deaerator, where the stock is dispersed into a lot of droplets and a layer of fluid-flim is formed, which moves along a cylindrical surface. And the boiling action, which is generated by the vacuum in the deaerator, makes the free air and bubbles in the stock expend, impact and break under low pressure so that the remained and combined air is effectively acted by three physical actions: separately jetting, impacting and boiling, thus the air in the stock will be 100% removed and fiber flocculation will also be mitigated. Simultaneously pulp's consistency fluctuation is divided into tiny monomers with independent component, and the monomers will dwell in the deaerator for a certain time; and being acted by the specially designed slice, the pulp flow is made flow in the opposite direction so that the pulp-flow pulsations whose frequency are higher than 0.03Hz and consistency fluctuation will be controlled effectively.
Spraying The stock is fed through low-pressure-drop Spinjet nozzles which are located in the cleaner. The effect is to create a spray to maximize the exposed droplet surface area and enhance air removal.
Impingement The hydraulic impact of stock against the roof of the de- aerator breaks down fiber bundles and releases bound air bubbles. The deaerator interior is highly polished to prevent any build-up of deposits.
Boiling The absolute pressure in the deaerator is maintained at the boil- ing point corresponding to the stock temperature by using a self-regu- lating vacuum system, which en- sures that all the air released in the deaerator is removed