(1) During the operation of the distillation tower, the temperature should be controlled at 199-201C to keep the naphthalene content in the phenol oil extracted from the top of the tower at 26% - 30%. If the tower top temperature is too low, the tea content in the phenol oil can be reduced to less than 26%, which may lead to unqualified industrial Cai; If the tower top temperature is too high. The content of naphthalene in phenol oil will probably increase, which may reduce the output of industrial naphthalene. The tower top temperature can be adjusted by the return flow of phenol oil.

(2)在精馏塔操作中，应将塔底温度控制在270- 273"C,使塔底温度采出的洗油中的萘含量保持在3%- -8%。若塔底温度过低，则洗油含茶量大幅上升;若塔底温度过高则工业茶质量也会不合格，塔底温度可用控制循环油槽的液面高度来进行调节。

(2) During the operation of the distillation tower, the tower bottom temperature should be controlled at 270 - 273 "C to keep the naphthalene content in the wash oil extracted from the tower bottom temperature at 3% - 8%. If the tower bottom temperature is too low, the tea content in the wash oil will increase significantly; if the tower bottom temperature is too high, the quality of industrial tea will also be unqualified. The tower bottom temperature can be adjusted by controlling the liquid level of the circulating oil tank.

(3)淡塔生产时，由于同时连续的采出酚油、工业萘和洗油三种产品，因此，按原料组成中各产品的含量比例采出，以稳定生产，保持萘塔操作的稳定和较高的萘精制率。

(3) During the production of light tower, because the three products of phenol oil, industrial naphthalene and wash oil are continuously extracted at the same time, they are extracted according to the proportion of each product in the raw material composition to stabilize the production and maintain the stability of naphthalene tower operation and high naphthalene refining rate.

(4)精馏塔在稳定状态下，塔顶、塔底和侧线各处温度波动范围不大，由塔底至塔顶70层浮阀塔盘的温度降为75-78C。既每块塔盘的温度将平均在1C左右，因此塔底或若塔顶的温度波动会影响仝塔温度梯度的变化。因此，在操作中调节单一因素要考虑全塔温度的影响，切勿单向大幅调节，而应该精心细调，仔细观察全塔的变化情况。

(4) Under the stable state of the distillation tower, the temperature fluctuation range at the tower top, bottom and side line is small, and the temperature from the tower bottom to the 70th floor of the tower top float valve tray drops to 75-78C. Since the temperature of each tray will be about 1C on average, the temperature fluctuation at the bottom or top of the tower will affect the temperature gradient of the whole tower. Therefore, when adjusting a single factor in operation, the influence of the whole tower temperature should be considered, instead of one-way large adjustment, careful adjustment should be made and the changes of the whole tower should be carefully observed.

该T:艺流程的特点是采用荼油或混合馏分为原料，在设有管式炉的精馏塔的设备系统中进行精馏，从精馏

The characteristic of this T: process flow is to use naphtha or mixed distillate as raw material, and carry out rectification in the equipment system of the distillation tower equipped with a tubular furnace

塔中切取酚油、含萘大于95%的工业恭和低萘洗油。它与双炉双塔工艺比较，简化了流程，降低了劳动消耗，

Phenolic oil, industrial naphthalene containing more than 95% naphthalene and low naphthalene wash oil are cut from the tower. Compared with double-furnace and double-tower process, it simplifies the process and reduces labor consumption,

减少了设备，但操作稳定性略差些， 同时操作控制难度较大。

The equipment is reduced, but the operation stability is slightly poor, and the operation control is difficult.

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