6.6 Coalescing bed-type oily water separators The coalesce is capable of forming oil globules up to l2 mm diameter and the heavier fuel oils usually form long 'stalagmites' which grow to a considerable size before they are released. Because of the 1ow velocities employed the collected oil can flow past the water screen without becoming re-entrained and carried through into the outlet

Principle The rising velocity of the globules carries them upwards where they become trapped by the under-surfaces of the plates and coalesce until the enlarged globules have sufficient rising velocity to travel along the plate surface and break away at the periphery

5.2 Operation Safety regulations In all centrifugal separators the bowl rotates at a very high speed, normally between 100 and l50 revolutions per second. Thus, very great forces are released and it is essential, therefore, to follow strictly the directions given in the Instruction Book concerning assembly of parts, starting, stopping and overhaul

3.3 Batch and continuous lubricating systems For small or medium units without a circulatory lubricating system, the oil is often treated on the batch system. As large a quantity of oil as possible is drained from the engine at intervals and run into a heating tank, the system being replenished with clean oil at the same time

Learning Objectives The learning objectives of this section are to make all engineers, engine cadets and other crew members who are involved in the handling of fuels onboard, familiar with: – How to handle the fuel. – Take the necessary simple precautions by following test procedures

A fire and bilge pump has suctions from sea, bilge main and engine room bilge, with discharges to fire main, oily water separator and overboard. A ballast pump has suctions from sea, ballast main, engine room , bilge direct and bilge main with discharges to overboard, the ballast main, the oily water separator and possibly, the main salt water circulating system

In motorships there are two main circuits, one salt , one fresh. The salt circuit is: sea inlet box (seachest) - pump(s) - f.w. coolers in series (first LT then HT) – turbo blower aftercoolers in parallel (if any) – provision condenser in parallel (if any) - overboard

在铁路建设、水利工程、 采矿工程以及其它土石方工 程中,爆破是目前应用最为 广泛、最为有效的一种破岩 手段。为了优化爆破参数, 必须了解岩石在爆破作用下 的破碎机理、装药量的计算 原理以及各种相关因素对爆 破效果的影响

工业炸药( Industrial explosive) 又称民用炸药( commercial explosive),是以氧化剂和可燃剂为 不在一起 主体,按照氧平衡原理构成的爆炸 岩石铵梯油炸药 南, 国云南包装 性混合物。工业炸药在铁路、公路 建设及煤矿、冶金、石油、地质、 水电、建筑等方面得到了广泛的应 云南包装厂生产 用

课的内容:游泳运动基础知识,游泳与运动健身价值及游泳运动发展动态 课的任务:比较全面了解游泳运动基本知识、掌握竞技游泳、实用游泳的基本知识