Purification Technology Edition: Daily Question [2017-11-18]
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What is the purpose of pre-washing? Answer: To remove the large amounts of gaseous light oils, ammonia, water, hydrogen cyanide, unsaturated hydrocarbons, and high-boiling-point impurities (naphtha) present in the raw gas, so as to prevent them from entering the main washing section and causing methanol contamination, which could affect absorption and regeneration processes.
The large amounts of gaseous light oils, ammonia, water, hydrogen cyanide, unsaturated hydrocarbons, and high-boiling-point impurities (naphtha) present in the raw gas are removed to prevent them from entering the main washing section and causing methanol contamination, which could affect absorption and regeneration processes.
Removing gaseous light oils, ammonia, water, hydrogen cyanide, and impurities from raw gas
Answer: To remove impurities such as gaseous naphtha and high-boiling hydrocarbons from gas.
The large amounts of gaseous light oils, ammonia, water, hydrogen cyanide, unsaturated hydrocarbons, and high-boiling-point impurities (naphtha) present in the raw gas are removed to prevent them from entering the main washing section and causing methanol contamination, which could affect absorption and regeneration processes.
The large amounts of gaseous light oils, ammonia, water, hydrogen cyanide, unsaturated hydrocarbons, and high-boiling-point impurities present in the raw gas are removed, so as to prevent them from entering the main washing section and causing methanol contamination, which could affect absorption and regeneration processes.
The large amounts of gaseous light oils, ammonia, water, hydrogen cyanide, unsaturated hydrocarbons, and high-boiling-point impurities (naphtha) present in the raw gas are removed to prevent them from entering the main washing section and causing methanol contamination, which could affect absorption and regeneration processes.
The large amounts of gaseous light oils, ammonia, water, hydrogen cyanide, unsaturated hydrocarbons, and high-boiling-point impurities (naphtha) present in the raw gas are removed to prevent them from entering the main washing section and causing methanol contamination, which could affect absorption and regeneration processes.
Pre-washing is a pre-decontamination process that involves the use of an appropriate amount of detergent. Due to the tension of water, plain water alone cannot wet the dirt; for fabrics with particularly severe dirt contamination, some wetting agents (emulsifiers) are added to wet the dirt and assist with the main cleaning process. The amount of emulsifier added is 1‰. The temperature and time during the pre-washing stage are the same as those for rinsing; the water level should also be at a medium to high level, and the number of times it should not exceed two. This process is only applicable to fabrics with particularly severe dirt contamination; generally, this step can be omitted.
The large amounts of gaseous light oils, ammonia, water, hydrogen cyanide, unsaturated hydrocarbons, and high-boiling-point impurities (naphtha) present in the raw gas are removed to prevent them from entering the main washing section and causing methanol contamination, which could affect absorption and regeneration processes.