工业萘的主要成份为有机化合物，是一种无色有光泽的片状结晶，根据纯度不同，萘可分为工业萘和精萘。工业萘的纯度一般约为96%。工业萘进一步提纯脱除杂质及脱硫后，可得到高纯度的精萘。

The main component of industrial naphthalene is organic compounds, which are colorless and glossy crystalline flakes. Depending on the purity, naphthalene can be divided into industrial naphthalene and refined naphthalene. The purity of industrial naphthalene is generally about 96%. After further purification and desulfurization of industrial naphthalene, high-purity refined naphthalene can be obtained.

生产工业萘的主要设备

The main equipment for producing industrial naphthalene

1、精馏塔：工业萘精馏塔一般采用浮阀塔，浮阀板层50—70层，塔径按处理量的大小有800—1200mm。

1. Distillation tower: Industrial naphthalene distillation tower generally uses a float valve tower, with 50-70 layers of float valve plates, and a tower diameter of 800-1200mm according to the processing capacity.

2、冷凝冷却器：冷凝冷却器是一个直径为1.2m，长为3.376m，冷却面积为122m2的列管式换热器，生产时冷却水走管内，萘蒸汽以138-140℃的温度从器顶进入管间，换热后再以80—90℃的温度从器底呈液体流出。冷却水从器底进入，器上部以40—50℃温度流出

2. Condensing cooler: A condensing cooler is a tubular heat exchanger with a diameter of 1.2m, a length of 3.376m, and a cooling area of 122m2. During production, the cooling water flows through the pipes, and naphthalene vapor enters the pipes at a temperature of 138-140 ℃ from the top of the condenser. After heat exchange, it flows out as a liquid at a temperature of 80-90 ℃ from the bottom of the condenser. Cooling water enters from the bottom of the device and flows out from the top at a temperature of 40-50 ℃

3、转鼓结晶机：其结构如图1-8所示图1-8 转鼓结晶机转鼓结晶机是将熔融状态的萘连续冷却成固态散装萘的机器。转鼓结晶机由机壳、保温池、转鼓、刮刀、冷却水管和传动装置组成。

3. Drum crystallizer: Its structure is shown in Figures 1-8. Drum crystallizer is a machine that continuously cools molten naphthalene into solid bulk naphthalene. The drum crystallizer consists of a casing, insulation pool, drum, scraper, cooling water pipe, and transmission device.

4、工业萘汽化冷凝冷却器：汽化冷凝冷却器由上、下两部分组成。

4. Industrial naphthalene vaporization condenser: The vaporization condenser consists of two parts: upper and lower.

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