Industrial naphthalene distillation production process

Abstract

The invention relates to the technical field of tar processing, in particular to an industrial naphthalene distillation production process, which adopts single-furnace double-tower equipment configuration and an operation mode that a primary distillation tower is used for atmospheric distillation and a rectifying tower is used for pressurized distillation, and comprehensively considers the need of continuous deep processing of a washing oil product while producing an industrial naphthalene product. The high-temperature absorber oil extracted from the bottom of the rectifying tower is directly used as a raw material for absorber oil processing without being cooled, so that the heat of each product and an intermediate product is reasonably utilized, the heat of high-temperature carbolic oil steam at the top of the primary tower is fully utilized, a raw material mixture is heated by the high-temperature carbolic oil, thereby not only saving the consumption of cooling water, but also being capable of generating byproduct steam, and the economic benefits of enterprises are improved. The production process is short in technological process, low in equipment investment, easy to operate, low in power consumption, energy-saving, environment-friendly and stable and reliable in product quality.

Description

technical field [0001] The invention relates to the technical field of tar processing, in particular to an industrial naphthalene distillation production process. Background technique [0002] Industrial naphthalene distillation is an important process in the tar processing industry. Its raw material is the naphthalene-containing mixture that is cut from high-temperature coal tar during the distillation process and eluted with alkali. After the raw material mixture is distilled with industrial naphthalene, in addition to industrial naphthalene products, various products such as phenol oil and washing oil can also be obtained. [0003] In terms of equipment configuration, industrial naphthalene distillation production processes include two furnaces and two towers, single furnace and two towers, and single furnace and single tower. The three processes have their own characteristics. According to the composition of raw materials and the quality requirements of products, they ar...

AI Technical Summary

Problems solved by technology

CN103242131A discloses "a kind of industrial naphthalene distillation process", which is an industrial naphthalene production process with double furnaces and double towers and atmospheric distillation. In addition to the advantages of wide range of raw materials and simple operation, this process also has the advantages of large equipment investment and high energy consumption. Disadvantages and deficiencies of high consumption

[0007] 1) The high-temperature phenol oil vapor extracted from the top of the initial distillation tower is all cooled by circulating water, and its heat has not been effectively utilized;

[0008] 2) In order to make the initial distillation tower operate under negative pressure, a vacuum unit is required, which brings noise pollution to the production site in addition to increasing power consumption;

[0009] 3) The high-temperature wash oil extracted from the bottom of the rectification tower is exchanged with the raw material three-mixed fraction and cooling water to cool down successively, which consumes a large amount of cooling water, especially in the follow-up washing oil processing of the industrial naphthalene distillation unit. The final washing oil needs to be reheated, which wastes energy consumption

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