曝光台

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造纸烘缸爆炸事故的技术分析

2008年初．某市一造纸厂造纸车间发生爆炸事故,无人员伤亡,但停产一个月,经济损失近三十万元,缸体从齿轮传动左侧周向断裂,炸成两段,大端落在机位左侧3米处,小端落在机位右侧2米处,造纸机架被炸塌。     

怎样认定醉酒是事故发生的原因？

编辑同志：我局于2007年9月12日,对市属的光明造纸厂王大宁受伤是否为工伤案件进行了处理。该事故是2007年4月50日发生的,受害方向仲裁委提出仲裁,厂方以王大宁“酗酒”为由,不承认其为工伤。在认定中我们对照调查取征询问笔录和现场勘察绘图,调查人员进行了反复推敲和分析,大家认为,受伤人王大宁在上班时间、工作地点,干了与工作有关的事情受的伤,喝酒没有达到醉酒程度,我们作出王大宁为工伤的认定。     

A comparative study of biopolymers and alum in the separation and recovery of pulp fibres from paper mill effluent by flocculation

Recovery of cellulose fibres from paper mill effluent has been studied using common polysacchatides or biopolymers such as Guar gum, Xanthan gum and Locust bean gum as flocculent. Guar gum is commonly used in sizing paper and routinely used in paper making. The results have been compared with the performance of alum, which is a common coagulant and a key ingredient of the paper industry. Guar gum recovered about 3.86 mg/L of fibre and was most effective among the biopolyrners. Settling velocity distribution curves demonstrated that Guar gum was able to settle the fibres faster than the other biopolymers; however, alum displayed the highest particle removal rate than all the biopolymers at any of the settling velocities. Alum, Guar gum, Xanthan gum and Locust bean gum removed 97.46%, 94.68%, 92.39% and 92.46% turbidity of raw effluent at a settling velocity of 0.5 cm/min, respectively. The conditions for obtaining the lowest sludge volume index such as pH, dose and mixing speed were optimised for guar gum which was the most effective among the biopolymers. Response surface methodology was used to design all experiments, and an optimum operational setting was proposed. The test results indicate similar performance of alum and Guar gum in terms of fioc settling velocities and sludge volume index. Since Guar gum is a plant derived natural substance, it is environmentally benign and offers a green treatment option to the paper mills for pulp recycling.     

处理造纸黑液的锅炉——碱回收锅炉简介

随着人类文明的不断发展，现代社会对纸张的需求越来越大。造纸的原料主要有：木材、草、芦苇、棉、麻等纤维类物质。廉价易获取是目前我国多以麦草造纸的主要原因。无论用何种原料造纸，都要产生黑液。许多造纸厂不加任何处理随便将黑液排放到江河湖海中，一方面浪费了大量的淡水和碱，另一方面严重污染了环境，不利于人与自然的协调发展。     

对企业污染行为应如何举证？

编辑同志：我们村附近去年新建了一家造纸厂,他们经常偷偷地排放污水,造成我们种的粮食和经济作物大量减产。我们多次与他们交涉,他们都置之不理,现在我们打算诉诸法律,让他们赔偿损失。请问,法院能受理我们的诉讼吗？我们的诉讼时效有没有过期？我们应当如何举证？