A supercritical water oxidation system recovers CO 2 Methods
An oxidation system and supercritical water technology, applied in the direction of oxidation water/sewage treatment, etc., can solve the problems of high energy consumption, complex structure of separation tower, etc., and achieve the effect of improving economy
Active Publication Date: 2022-02-11
TIANJIN REDSUN WATER IND
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Problems solved by technology
This method needs to provide cooling units such as condensers to continue to cool the gas until the CO 2 Below the liquefaction point, the energy consumption is higher; and this method needs to establish O 2 with CO 2 separation tower, the structure of the separation tower is complex
Recovery of supercritical CO for supercritical water oxidation systems 2 patents have not yet been reported
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and a specific embodiment given by the inventor.
[0020] The SCWO device is composed of SCWO reactor, cooler, pressure reducer, temporary storage tank and pump, heating furnace, heating cable, temperature and pressure sensor and other components. Before processing materials, start the SCWO device, first inject air into the SCWO device, Adjust the pressure of the device so that the reactor and cooler reach 25MPa, and the pressure reducer and temporary storage tank reach 16MPa; then inject clean water into the device, start the heating device, and the temperature in the reactor reaches 600°C, and the cooler, pressure reducer, After the temperature in the temporary storage tank reaches 40°C, the start-up of the device is completed. with O 2 As an oxidant, the material with a COD of 80,000mg / L is pumped into the SCWO device for processing. During the entire proces...
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The invention relates to the field of resource utilization of organic wastewater treatment, and specifically provides a supercritical water oxidation system for recovering CO 2 The method comprises the following steps: (1) after the waste water is treated by a reactor of a supercritical water oxidation device, the temperature and pressure of the outlet materials are lowered, so that the outlet water is cooled to 35-95°C and the pressure is lowered to 10-18MPa; (2) the materials enter the temporary Storage tank, after filling the liquid, open the temporary storage tank CO 2 Pressure reducing valve on the collection port, CO dissolved in water 2 It overflows from the water in the form of gas, and after the droplets are removed by the mist catcher and dried by the dryer, it enters the CO 2 The collector collects. The invention lowers the temperature and pressure of the outlet material of the supercritical water oxidation device reactor to a certain extent, while maintaining the supercritical CO 2 The temperature and pressure, and then realize the CO 2 with O 2 , N 2 and water separation, recovery of CO 2 ; At the same time, this method reduces the emitted O 2 , N 2 CO contained in 2 quantity. The invention significantly improves the economical efficiency of the system operation, and can be widely used in a continuously operating supercritical water oxidation system for treating organic waste.
Description
technical field [0001] The invention relates to the field of resource utilization of organic wastewater treatment, in particular to a supercritical water oxidation system for recovering CO 2 Methods. Background technique [0002] Supercritical Water Oxidation (SCWO) is a new and efficient treatment technology for highly difficult industrial organic pollutants. Under supercritical conditions (T>374.15°C, P>22.12MPa), water has the properties of both gas and liquid, and has a liquid-like density, solubility and good fluidity. It is a non-polar solvent and has Gas-like diffusion coefficient and low viscosity. In the supercritical state, organic matter, oxidant and water form a homogeneous phase, which overcomes the material transport resistance between phases, and makes the multi-phase reaction transformation that originally occurred between liquid or solid organic matter and gaseous oxygen proceed in a single phase. At the same time, high temperature and high pressure...
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IPC IPC(8): C02F1/72
CPCC02F1/72C02F2301/066
Inventor 李爱玲吴国熙段超李海青
Owner TIANJIN REDSUN WATER IND