(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)在精餾塔操作中，應(yīng)將塔底溫度控制在270- 273"C,使塔底溫度采出的洗油中的萘含量保持在3%- -8%。若塔底溫度過低，則洗油含茶量大幅上升;若塔底溫度過高則工業(yè)茶質(zhì)量也會不合格，塔底溫度可用控制循環(huán)油槽的液面高度來進行調(diào)節(jié)。

(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)淡塔生產(chǎn)時，由于同時連續(xù)的采出酚油、工業(yè)萘和洗油三種產(chǎn)品，因此，按原料組成中各產(chǎn)品的含量比例采出，以穩(wěn)定生產(chǎn)，保持萘塔操作的穩(wěn)定和較高的萘精制率。

(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)精餾塔在穩(wěn)定狀態(tài)下，塔頂、塔底和側(cè)線各處溫度波動范圍不大，由塔底至塔頂70層浮閥塔盤的溫度降為75-78C。既每塊塔盤的溫度將平均在1C左右，因此塔底或若塔頂?shù)臏囟炔▌訒绊戀谒囟忍荻鹊淖兓?。因此，在操作中調(diào)節(jié)單一因素要考慮全塔溫度的影響，切勿單向大幅調(diào)節(jié)，而應(yīng)該精心細調(diào)，仔細觀察全塔的變化情況。

(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.

該T:藝流程的特點是采用荼油或混合餾分為原料，在設(shè)有管式爐的精餾塔的設(shè)備系統(tǒng)中進行精餾，從精餾

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%的工業(yè)恭和低萘洗油。它與雙爐雙塔工藝比較，簡化了流程，降低了勞動消耗，

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,

減少了設(shè)備，但操作穩(wěn)定性略差些， 同時操作控制難度較大。

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

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