Process abnormality

This post was last edited by Catalysis Yisu on 2018-10-28 16:10. First of all, you should tell me what the material is. Only by knowing the characteristics of the material can I give you suggestions.

I don’t understand the question. “The low boiling point solvent is affected by the external temperature. After the gas phase evaporates, it condenses in the pipeline, causing the products in the tank to fuse again and form lumps under the action of steam.” Among them is the sentence “Lumps are formed under the action of steam.” I don't know whether the steam heats the tank or the pipe. Let me give you some reference advice first. Does the agglomeration mean that the steam temperature is too high? Is it possible to consider using steam to heat the water, the water is heating where you should. The best suggestion is to discuss it in terms of process.

The solvent is methylene chloride, with a boiling point of 39.8 degrees Celsius. The product is insoluble in water, so water and the product are mixed into a slurry for transportation. During the subsequent treatment process, steam is introduced into the tank to increase the temperature. At this time, about 16% of the solvent evaporates in the slurry. However, during the treatment process, the bottom of the tank Parts were transported through centrifugal pumps. The weather dropped and the filter was seriously clogged. It was suspected that methylene chloride was backflowing. The tank and gas phase pipelines had been traced through steam tracing pipes, but they were still easy to agglomerate, causing the centrifugal pump to frequently pick up or jam the material. The material cleaned out inside the pump chamber was hard, and a reflux pipeline was set up at the pump outlet.

The solvent is methylene chloride, with a boiling point of 39.8 degrees Celsius. The product is insoluble in water, so water and the product are mixed into a slurry for transportation. During the subsequent treatment process, steam is introduced into the tank to increase the temperature. At this time, about 16% of the solvent evaporates in the slurry. However, during the treatment process, the bottom of the tank Parts were transported through centrifugal pumps. The weather dropped and the filter was seriously clogged. It was suspected that methylene chloride was backflowing. The tank and gas phase pipelines had been traced through steam tracing pipes, but they were still easy to agglomerate, causing the centrifugal pump to frequently pick up or jam the material. The material cleaned out inside the pump chamber was hard, and a reflux pipeline was set up at the pump outlet.

The solvent is methylene chloride, with a boiling point of 39.8 degrees Celsius. The product is insoluble in water, so water and the product are mixed into a slurry for transportation. During the subsequent treatment process, steam is introduced into the tank to increase the temperature. At this time, about 16% of the solvent evaporates in the slurry. However, during the treatment process, the bottom of the tank Parts were transported through centrifugal pumps. The weather dropped and the filter was seriously clogged. It was suspected that methylene chloride was backflowing. The tank and gas phase pipelines had been traced through steam tracing pipes, but they were still easy to agglomerate, causing the centrifugal pump to frequently pick up or jam the material. The material cleaned out inside the pump chamber was hard, and a reflux pipeline was set up at the pump outlet.

The tank has been heated and the gas phase has been heated, but it still doesn't work. As soon as the temperature drops, the pump stops working.

1. The tank is heated by steam, and the temperature inside the tank is guaranteed. Even if the gas phase agglomerates back into the tank, the temperature inside the tank will not agglomerate again. 2. Your gas phase pipe and tank have heat tracing and insulation, but do you have heat tracing and insulation on the bottom liquid phase pipeline? ? This is the point! ! The liquid phase pipe also needs to be heated and insulated to ensure that the liquid phase does not cause sludge to condense and agglomerate due to the temperature drop. 3. As you said, there is no problem under normal circumstances. This phenomenon will occur once the temperature drops in rainy days. Then we need to rule out whether the current insulation or heat tracing has failed? Leaking? Check the insulation condition on site.

This is called a high boiling point, not a low boiling point, and it is a boiling point, not a freezing point. What is the reason for freezing? It seems that heat tracing can solve the coagulation problem, so the entire system should be heated and there should be no missed points. Especially as mentioned above, partial heating or insulation fails when it rains and so on.