Multilevel heating apparatus and method for high-salt waste water supercritical water oxidation system

Abstract

The invention discloses a multilevel heating apparatus and method for a high-salt waste water supercritical water oxidation system, which belongs to the technical fields of chemical industry and environmental protection. The multilevel heating apparatus is formed by serially connecting a plurality of heating units, wherein each heating unit comprises a long straight pipe, a slide-rail pipeline heater, a thermometer and a pressure gauge, the heating units are connected by virtue of short straight pipes, and the heating unit is provided with parts such as a detachable insulating sleeve, an ultrasonic pipeline scale remover, a filter and an auxiliary material inlet. The conventional heating apparatus is divided into a plurality of heating units, the defects of the conventional electric heaterthat the heating pipes are intensively distributed and no additional operation space is provided can be solved, and conditions are provided for adding a pipeline filter, the ultrasonic pipeline scaleremover and a chemical inlet. When the high-salt waste water is heated, the crystallization blockage position of inorganic salts can be precisely positioned by virtue of temperature and pressure measure points, so that the scale can be removed on purpose by independently using or jointly using multiple means.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and environmental protection, and specifically relates to a multi-stage heating device and method for a supercritical water oxidation system of high-salt wastewater. Background technique [0002] High-salt wastewater refers to wastewater with a total salt content of at least 1%. This type of wastewater mainly comes from various chemical processes and the collection and processing of oil and gas. With the gradual improvement of my country's industrial level, the output of high-salt wastewater has increased year by year. However, there is still no better means for the treatment of high-salt wastewater. Due to the extremely high salt content in wastewater, if biological methods are used to remove organic matter in wastewater, salt substances have a strong inhibitory effect on microorganisms; if physical methods (such as multi-effect evaporation, multi-stage flash evaporation or vapor comp...

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Problems solved by technology

[0006] In order to overcome the defects in the above-mentioned prior art, the present invention provides a multi-stage heating device and method for supercritical water oxidation system of high-salt wastewater, which suppresses the crystallization of inorganic salts on the wall of the heating pipe by various means, Effectively remove the inorganic salts, solve the problem of pipeline blockage caused by the crystallization of inorganic salts in the heater, and improve the reliability and safety of the system

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