,Chlor-alkali accident

Is the high hydrogen content in chlorine caused by pinholes in the ion membrane? It’s time to change the film

My guess is that it is easy to explode because it easily reaches the explosion limit of hydrogen.

When the electrolysis chamber is damaged in the later stages of operation, the hydrogen in the cathode chamber easily enters the anode chamber, causing the hydrogen content in the chlorine to increase.

It may happen when chlorine and hydrogen reach the explosion limit. Is your factory prone to explosion when drying, or in other places, such as after chlorine is compressed?

The efficiency of the ion membrane decreases in the later stage, there are pinholes on the membrane, hydrogen gas mixes with chlorine gas, the hydrogen content in the chlorine increases, and there are flow dead corners in the chlorine treatment gas pipeline, so it is easy to explode.

I know this: Because after the chlorine gas is dried, the water is removed, and the hydrogen content increases accordingly. Therefore, it generally reaches the explosion limit after drying and explodes!

The high hydrogen content in chlorine is caused by pinholes in the ion membrane. The membrane should be replaced. After the chlorine gas is dried, the moisture is removed, and the hydrogen content increases accordingly, reaching the explosion limit (5%--87.5%).

There should be pinholes in the membrane, otherwise the explosion limit would not be reached based on the aging of the membrane alone. Also, drying and explosion is too general. Can you be more detailed?

Guo Yiyong, your place has just been open for a few days. It is impossible that the hydrogen content in the chlorine coming out of the tank is high!!! The high hydrogen content in the chlorine in the later stage of the membrane is mainly due to: 1. The decrease in the physical properties of the membrane, such as pinholes, cracks, etc. When the cathode pressure is greater than the anode, the cathode product enters the anode through the membrane, resulting in high hydrogen content in the chlorine. 2. The performance of the carboxylic acid layer of the membrane is reduced. The intensification of hydroxide reverse osmosis makes the chlorine contain too much hydrogen. The hydrogen content in oxygen chlorine increases. 3. The influence of the structure of the electrolytic cell. For example, ICI's FM21-SP type electrolytic cell does not have pipelines for electrolyte and gas use. It relies on its own channels composed of electrodes and gaskets to achieve electrolyte circulation. Therefore, in the later period, due to the aging and corrosion of the gaskets, the products of the cathode flow to the anode, resulting in high hydrogen content in the chlorine and PH of the anolyte. Chlorate, hypochlorite, etc. increase. Furthermore, it is also related to the circulation mode of the electrolytic cell. This situation can be slightly alleviated by stabilizing the output and reducing the pressure difference! However, the fundamental solution is to replace the membrane. However, you and Lao Niu and Lao Lu will find out where it is caused because your driving time is too short. Your cell is new, and high hydrogen content is usually caused by membrane leakage, which will cause great damage to the electrode coating. The pressure difference of your electrolytic cell fluctuates a lot. A few days ago, I went to Shandong Pesticide Factory. Their new electrolytic cell is also made of chlorine engineering, just like the one in your factory. However, they do not use water seals to control the hydrogen pressure and pressure difference, but use pneumatic valves. Their cell pressure difference is relatively stable.

The main reasons why high hydrogen content occurs in the drying system are: 1. The equipment and pipelines of the drying system are made of PVC, which is prone to static electricity. 2. The drying system equipment has many long pipelines and is prone to dead ends. 3. Chlorine gas easily contacts organic matter (butter, etc.), causing natural flash and explosion. 7th floor "I know this.: Because after the chlorine gas is dried, the water is removed, and the hydrogen content increases accordingly. Therefore, it generally reaches the explosion limit after drying and explodes! "This is wrong because when sulfuric acid is used as a desiccant, sulfuric acid not only has the function of absorbing water, but also has the function of dehydration. It can release hydrogen and oxygen in the form of water molecules. So when we measure the purity of the original chlorine (if the drying system does not leak, the negative pressure there is more likely to leak), it should be higher than the outlet of the battery and the hydrogen content is lower. Guo Yiyong, guess who I am????

I think this phenomenon mainly occurs in electrolysis. If there is a problem with chlorine and hydrogen, then the hydrogen content in the chlorine is serious. All the chlorine in this chlorine gas main pipe is unqualified. Therefore, during the driving process, you must do a good job in analyzing the hydrogen content in the chlorine and increase the frequency to reduce the chance of accidents.

In fact, I think that when an explosion occurs, nine out of ten cases there is a serious leakage problem in the ion membrane, and the hydrogen gas leaks into the chlorine gas.