Device with spray drying tower for removing organic matters in industrial waste salt

Abstract

A device with a spray drying tower for removing organic matters in industrial waste salt comprises a tempering tank, a buffer tank, the spray drying tower, a bag-type dust collector, a spray tower and a chimney, and is characterized in that a high-speed centrifugal atomizer is arranged at the top of the spray drying tower, an inlet of the high-speed centrifugal atomizer is connected with an outlet of the buffer tank through a second pipeline, and a waste liquid inlet of the buffer tank is formed in the other side, opposite to the buffer tank outlet, of the buffer tank and connected with the waste liquid outlet of the tempering tank through a first pipeline. According to the method, organic salt with the melting point generally being about 350 DEG C is converted into organic acid with the boiling point generally being about 150 DEG C, the organic acid and other non-salt organic matter can be pyrolyzed and removed thoroughly only at the relatively low medium temperature, and the problems of material hardening, blocking, coking and the like caused by high-temperature melting and decomposition of waste salt are solved. A combination of the spray drying tower and the bag-type dust collector is adopted to recover high-grade sodium chloride and sodium sulfate.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a device with a spray drying tower for removing organic matter in industrial waste salt. Background technique [0002] In the pharmaceutical, pesticide, petrochemical and fine chemical industries, acidification and alkalization processes are often used to form a large amount of waste salt solution, mainly sodium chloride and sodium sulfate, when the products are purified and treated, and the pH value is about 9 to 14, mixed with other complex organic substances, such as organic salts, chlorobenzenes, nitrobenzenes, phenols, etc., accounting for about 15% of the total. Waste salt solutions are generally dried to form solid industrial waste salt, in which organic matter is mixed, which causes great difficulties for subsequent salt recovery and treatment, and can only be treated as hazardous waste. [0003] At present, there are mainly several methods for removing ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above disadvantages, thereby providing a device with a spray drying tower for removing organic matter in industrial waste salt, which converts organic salts with a melting point generally around 350°C into organic salts with a boiling point generally around 150°C. Organic acids, together with other non-salt organic substances, only need a relatively low medium temperature to completely remove organic substances by pyrolysis, and avoid problems such as material compaction, clogging, and coking caused by high-temperature melting and decomposition of waste salt

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