亚洲国产精品久久人人爱,中文字幕久久精品一二三区,亚洲啪啪综合av一区,亚洲男人第一av网站

equipment

Identifier: 

Model: 

Technical:

Introduction:

Titanium and its alloys have the advantages of light weight, high specific strength and good comprehensive mechanical properties. It has stronger passivation than chrome, nickel and stainless steel. The formed passivation film has very high chemical stability and is subject to mechanical damage. In a certain oxidizing atmosphere can also be self-healing, repair as ever. Therefore, titanium is extremely resistant to corrosion in many active media, especially in oxidizing media and chlorine and chloride. Chloride and other media have the best corrosion resistance. In China, titanium began to be used in the chlor-alkali industry in the early 1970s. It has achieved remarkable economic benefits and is known as a major anti-corrosion revolution in the chlor-alkali industry.

Ionic membrane production of caustic soda has good product quality. Alkali contains low salt, raw materials and energy consumption, environmental pollution, production strength, high level of automation, is the world's most recognized technology is the most advanced. The most economical production method. Since 1986, there have been nearly 40 ion-exchange membrane caustic soda plants in China. With the continuous expansion of ion-exchange membrane production caustic soda technology in the chlor-alkali industry, the use of titanium equipment is also increasing. The application of titanium equipment in the ion-exchange membrane caustic soda industry is described below using the production equipment of Zhejiang Shangao Chemical Co., Ltd. as an example. .

1 Application of titanium equipment

In the ion-exchange membrane caustic soda production plant, titanium is mainly used in equipment and pipelines for secondary refining, electrolysis and dechlorination, chlorine treatment and other systems of brine.

2 Points to note when using titanium equipment in the chlor-alkali industry

(1) Titanium cannot be used in dry chlorine gas. Titanium is in chlorine, even if the temperature is below 0 ° C, violent chemical reactions will occur, resulting in the formation of titanium tetrachloride, and then decomposed into titanium dichloride, and even corrosion combustion. To maintain the stability of titanium in chlorine, the moisture content in chlorine should not be less than 0.5%.

(2) Under normal circumstances, titanium will not have pitting corrosion, intergranular corrosion and stress corrosion, but titanium is more prone to crevice corrosion, especially in the gap width of about 0.5mm easier to corrosion. Crevice corrosion often occurs at the junction of the tube and tube plate of the heat exchanger, the contact between titanium and non-metal gaskets, and is also susceptible to crevice corrosion in saturated brines with temperatures above 120°C. Prevent crevice corrosion can take the following measures: 1 equipment to avoid the existence of gaps and stagnation area; 2 using titanium palladium alloy flange welding ring, or titanium gasket and titanium packing gasket; 3 heat exchanger with titanium tube and tube plate The connection uses strength expansion seal welding.

(3) After titanium equipment is contaminated with iron, it will reduce its corrosion resistance and cause embrittlement through hydrogenation. The more serious it is contaminated with iron, the more hydrogen is absorbed by titanium, and therefore is processed. When repairing and maintaining titanium equipment, steel tools should not be used as much as possible.

It can be foreseen that helium equipment will have a broader application prospect with the development of the chlor-alkali industry.

[prev]:equipment
[next]:返回列表
?

Products

'); })(); 亚洲av无码乱码国产麻豆穿越| 亚洲精品国产情侣av在线| 小莹客厅激情38章至50章一区 | 国产av一区二区三区日韩| a级毛片无码久久精品免费| 久久午夜无码免费| 麻豆乱码国产一区二区三区| 国产suv精品一区二区33| 成人aaa片一区国产精品| 超碰aⅴ人人做人人爽欧美| 蜜臀av在线播放一区二区三区| 亚洲精品欧美精品日韩精品| 日韩一区精品视频一区二区| 日韩激情无码免费毛片| 日本乱偷人妻中文字幕| 国产成a人片在线观看视频下载 | 欧美老妇与zozoz0交| 亚洲一区二区无码偷拍| 色婷婷狠狠久久综合五月| 自愉自愉产区二十四区| 国产精品亚洲综合色区| 看曰本女人大战黑人视频| 胯下粗长挺进人妻体内电影| 欧美乱人伦人妻中文字幕| 波多野结衣美乳人妻hd电影欧美 | 成人年无码av片在线观看| а天堂中文在线官网| 国产suv精品一区二区| yw尤物av无码国产在线观看| 漂亮人妻被黑人久久精品| 一本一道av无码中文字幕| 无套内谢老熟女| 日韩精品无码久久一区二区三| 成人内射国产免费观看| 国产亚洲欧美日韩在线一区 | 亚洲国产精品久久久久婷蜜芽 | 精品三级av无码一区| 成人无码www免费视频| 亚洲色成人www永久网站| 国产成人无码免费看片软件| 麻豆md0077饥渴少妇|