Energy-saving type oxyanthraquinone production device

Abstract

An energy-saving type oxyanthraquinone production device is disclosed, the technology relates to the technical field of production device for preparing anthraquinone by taking anthracene as raw material and carrying out air oxidation. The device makes full use of oxidation reaction heat brought out by a high-temperature molten salt and high-temperature materials, normal-temperature air is preheated through a molten salt-air heat exchanger and a material-air heat exchanger in a fire barrier, the preheated air is provided for a hot blast stove, after the oxidation reaction heat energy is recycled by the heat exchangers, an air inlet temperature of the hot blast stove is changed from an original device room-temperature temperature into a hot air temperature of 180 DEG C-200 DEG C, and thus the device greatly reduces the coal consumption amount of the hot blast stove and has the energy saving effect.

Description

technical field [0001] The technology of the invention relates to the technical field of a production device for preparing anthraquinone by using anthracene as a raw material through air oxidation. Background technique [0002] The production of dye intermediate anthraquinone (commonly known as: oxidized anthraquinone, to distinguish it from synthetic anthraquinone) by air oxidation with anthracene as raw material has a history of decades in our country. The main process is as follows: ≥90% of anthracene is put into the melting anthracene kettle for heating and melting, then pumped into the vaporization kettle with a submerged pump, and then 0.03Mpa superheated steam is introduced into the vaporization kettle to vaporize the anthracene, enter the mixer, and mix with hot air at ≥250°C Enter the fixed bed oxidizer equipped with alum catalyst to oxidize anthracene to anthraquinone. Due to the influence of parameters such as anthracene void ratio, catalyst activity, and oxidatio...

AI Technical Summary

Problems solved by technology

[0004] The shortcomings of the above three control methods are: 1. In the process of manual operation and regulation, it is difficult to accurately control the reaction temperature. The result of multi-element balance, such as heat and heat removed by the salt bath, especially the change of reaction temperature will bring about the change of oxidation reaction speed and the change of reaction heat. If the side reaction increases, the reaction heat will be released in large quantities, and the reaction temperature will be higher Difficult to master

2. Due to the periodic activation of the catalyst, a large air volume is required, so the air volume configuration of the Roots blower is relatively high, and the air supply volume during normal production is about 2 / 3 of the rated air volume, and the remaining 1 / 3 of the air volume is exhausted by the buffer tank Empty, resulting in a large waste of power

3. The heat of oxidation reaction adopts molten salt circulation, and dissipates heat to the environment through the pipeline molten salt storage tank, and a large amount of reaction heat energy is not utilized

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