Supercritical water oxidization treatment device for organic waste water and temperature control method

Abstract

The invention discloses a supercritical water oxidization treatment device for organic waste water and a temperature control method. The temperature control method is characterized in that fine adjustment of work temperature of a reactor can be realized by adjusting heating power of a heating furnace and flux of cooling water flowing into a first surface type attemperator, and meanwhile, a supercritical water temperature condition of the fluid in a hydraulic cyclone device can be guaranteed; and overtemperature protection control over the reactor is realized by adjusting flux of cooling waterof a second surface type attemperator and heating power of the heating furnace. With the adoption of the temperature control method, the control requirements on temperature of the reactor during the normal operation and security of the reactor in the system can be met, and the supercritical water temperature condition for desalting of the hydraulic cyclone device can be effectively guaranteed, sothat safe and reliable operation of the supercritical water oxidization treatment system for the high-salinity organic waste water is realized.

Description

technical field [0001] The invention relates to an organic wastewater treatment device and method, in particular to a supercritical water oxidation treatment device and temperature control method for organic wastewater with high salt content (salt mass content is 5% to 10%). Background technique [0002] Supercritical Water Oxidation (SCWO for short) utilizes the special properties of supercritical water (T>374.15°C, P>22.12MPa) as a good solvent for both organic matter and oxidants. Under the premise of providing sufficient oxidants, organic matter Carry out a homogeneous reaction in an oxygen-rich environment, rapidly and thoroughly destroy organic matter deeply, and convert it into H 2 O.CO 2 and other harmless small molecular compounds and inorganic salts. The solubility of inorganic salts in supercritical water is extremely low and can be easily separated. SCWO is mainly used in the efficient and harmless treatment of high-concentration organic wastewater that ...

AI Technical Summary

Problems solved by technology

When blockage occurs, the whole unit must be shut down, flushed and restarted, which reduces the reliability of SCWO unit operation

In order to solve the clogging problem caused by salt deposition in the reactor, the extremely low solubility of inorganic salts in supercritical water can be used to separate inorganic salts under supercritical water conditions by using hydrocyclones, and the high temperature and high pressure reactor operation Conditions and supercritical water temperature requirements of the hydrocyclone put forward strict requirements for the control of the supercritical water oxidation treatment system. A report on temperature control method of complex supercritical water oxidation treatment system with cyclone

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