空分装置工艺空气冷却器液位波动事故分析与处理

本文针对空分装置工艺冷却器在分子筛切换时液位波动冷却水进入分子筛事故的现象进行阐述,分析造成事故的原因,提出预防措施。     

HANDLING CLAY PRODUCTS WITH STORAGE BATTERY TRUCKS1

Economies of storage battery trucks which have been proved are cited. Comparison of cost of wheelbarrow and truck methods is given showing that trucks will pay for themselves the first year, have low cost upkeep, and will last for twelve or more years.     

AIR CONDITIONING IN CERAMICS1

This paper outlines the general factors considered in an air-conditioning problem. The present type of applications in the ceramic industry include (1) complete drying of ware, (2) conditioning of material and formed pieces, (3) humidifying and dehumidifying of manufacturing departments, (4) air washing, (5) cooling for comfort. Illustrations showing details of some of these cases are included. The present progress indicates the general line of future development of air conditioning in the manufacture of ceramic products.     

THE HANDLING,STORING AND SETTING OF GLASS POTS1

“A glass pot is a wonderful piece of engineering:” It is an expensive article and deserves the most careful treatment. The precautions indicated are; careful packing for shipment in ruin proof box cars, well padded pot carriages equipped with the spring suspensions, storage in a warm, dry room, careful preparation of furnace bench to insure an even distribution of load on the bottom of the pot and to make certain that the pot is level, or tilted slightly forward. Unnecessary jolts often result in damage which only becomes apparent when the pot is heated up.     

HANDLING AND STORING RAW MATERIALS TO PRODUCE UNIFORMITY IN A BODY1

Ceramic raw materials are usually heterogeneous mixtures rather than pure substances. Variations in composition are likely to occur in the materials as received at the plant both within individual carloads and between successive carloads of the same material. Such variations often cause trouble in plants making vitreous porcelain. The article describes ways of avoiding trouble, (a) by rendering each carload homogeneous as it is stored, (b) by withdrawing a material from several lots simultaneously to make the body; in withdrawing from several lots simultaneously, the process should preferably be continuous, one lot being finished as a new one is started, (d) and by keeping accurate records of the materials going into each production batch of body.     

SOME SOURCES OF AIR IN CLAY COLUMNS1

Absorbed gases are of considerable importance as sources of air in clay column. A few measurements are reported, and inferences drawn thereon.     

AN APPARATUS FOR THE DETERMINATION OF ADSORBED AIR1

Some possible ceramic applications of the Toepler mercury pump as employed in determination of gases in various materials are discussed. The procedure followed in measuring the gases given off by a clay slip at reduced pressures is described. It was found that 4.65% of gases by volume are removed from a sample of clay slip by reducing the pressure on the sample to boiling (25 mm.). An additional 0.18% of gases was cvolved between the boiling pressure and 1.8 mm. at which pressure the sample was dry.     

NEULANA AIR

正NEULANA AIR面料采用100%澳大利亚美丽诺羊毛制成,是提供空气般轻盈柔软的优质梭织面料。工艺美丽诺羊毛本身就具有良好的保暖性能,NEULANA AIR面料特有的结构又将纤维间的空气含量最大化,减少面料面密度的同时保证了最佳的隔离保温效果。     

高压板式换热器堵塞故障处理及防范措施

介绍高压板式换热器0.45MPa氮气通道堵塞的故障处理过程,分析引起堵塞的原因,提出相应的防范措施,以便于同类型设备运行参考。     

3300传感器系统常见干扰及处理

简述3300传感器组成和工作原理及在生产实际应用中常见干扰和处理。     

大型氨罐检修的工艺处理方法

结合氨罐检修前工艺处理的情况,分析大型氨罐检修的难点、探讨氨罐安全环保检修的对策、解决办法及工艺处理步骤,实现安全环保作业。     

尿素汽提塔堵管处理及优化控制

分析赤天化日产1620t二氧化碳汽提法尿素装置汽提塔腐蚀及堵管情况,在工艺上采取措施进行优化控制,保证了系统生产能力不降低。     

PVC挤出行业的物料处理

介绍一种集成化、全电脑控制的PVC配料、混料新技术。该技术采用电子称量配料、密闭风送、自动混合及储存,并采用电脑集中控制和管理。该技术可应用于PVC挤出加工之前的物料准备过程。     

MICROFLORA CHANGES IN TUNA MINCE DURING CONVECTION AIR DRV1NG

Abstract

Microorganisms grow in tuna during drying at low temperatures. The drying temperature of 50°C or below is not lethal to the microflora. The decimal reduction time (D-value) varied from 12.66 to 2.63 hr when drying temperature increased from 60 to 100°C, respectively. These values can be used to estimate the lethal effect of drying on the natural microflora in tuna.     

MICROFLORA CHANGES IN TUNA MINCE DURING CONVECTION AIR DRV1NG

Microorganisms grow in tuna during drying at low temperatures. The drying temperature of 50°C or below is not lethal to the microflora. The decimal reduction time (D-value) varied from 12.66 to 2.63 hr when drying temperature increased from 60 to 100°C, respectively. These values can be used to estimate the lethal effect of drying on the natural microflora in tuna.     

二氧化碳压缩机自动过临界问题及处理措施

通过对尿素生产装置二氧化碳压缩机自动过临界的问题进行分析,提出解决方法和整改措施,对改造后情况进行评估,为机组良好运行创造条件。