Factors affecting naphthalene content in gas
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Does anyone know what the factors affecting the presence of naphthalene in gas are, and what is the typical level of naphthalene in gas? This post was last edited by ldy6230016 on 2009-2-16 10:52.]
If the gas contains a high level of naphthalene, it may be due to: 1. Poor efficiency in removing naphthalene during the initial cooling stage (is your initial cooler of the horizontal-tube type or something else?) ) 2. The effect of final cooling for removing naphthalene is poor. 3. The oil used for washing before entering the plant contains high levels of naphthalene; it is recommended to strictly control quality. 4. The temperature of the gas entering the benzene washing tower is too low, which causes naphthalene in the gas to be removed by the washing oil inside the tower. 5. A high level of naphthalene in the washing oil also leads to a high naphthalene content in crude benzene; moreover, the extraction of naphthalene from the side streams of the benzene removal tower also needs to be determined based on specific circumstances. Naphthalene content in gas: Naphthalene content in gas after naphthalene washing tower: ≤0.5g/Nm3. This post was last edited by ryn on 2009-2-16 08:37
Rough gas generally contains 8–12 g/m3 of naphthalene； The purified gas used by steel mills is required to have a naphthalene content of 0.2–0.7 g/m3; different factories have varying requirements, but generally the standard is as follows
To keep the naphthalene content in the gas at <500 mg/m3, it is necessary to ensure effective spraying of light tar in the primary cooler and to keep the temperature of the gas after primary cooling below 23°C. Otherwise, not only will the desulfurization efficiency be affected, but also deposits such as naphthalene remaining in the desulfurization liquid will enter the product sulfur along with the sulfur bubbles, directly affecting the color of the sulfur.