Abstract: Disclosed is a multifunctional continuous hydrothermal oxidation experiment system, comprising a reactor (12), wherein an inlet of the reactor (12) is connected in parallel with an oxidant pipeline and a material pipeline; the oxidant pipeline comprises a gas oxidant delivery pipe and a liquid oxidant delivery pipe connected in parallel, and the gas oxidant pipe comprises an air oxidant delivery pipe and an oxygen delivery pipe connected in parallel; and a heat exchanger and a preheater are sequentially connected in series on the oxidant pipeline and the material pipeline, the oxidant pipeline and the material pipeline are in communication with an inner pipe of the heat exchanger; and the outlet of the reactor (12) is sequentially in communication, by means of piping, with a corrosion experiment device (14), an outer pipe of the heat exchanger, a cooler (16) and a gas-liquid separator (17).

Abstract: Disclosed is a multifunctional continuous hydrothermal oxidation experiment system, comprising a reactor (12), wherein an inlet of the reactor (12) is connected in parallel with an oxidant pipeline and a material pipeline; the oxidant pipeline comprises a gas oxidant delivery pipe and a liquid oxidant delivery pipe connected in parallel, and the gas oxidant pipe comprises an air oxidant delivery pipe and an oxygen delivery pipe connected in parallel; and a heat exchanger and a preheater are sequentially connected in series on the oxidant pipeline and the material pipeline, the oxidant pipeline and the material pipeline are in communication with an inner pipe of the heat exchanger; and the outlet of the reactor (12) is sequentially in communication, by means of piping, with a corrosion experiment device (14), an outer pipe of the heat exchanger, a cooler (16) and a gas-liquid separator (17).

Abstract: A system for preparing nanoparticles by supercritical hydrothermal synthesis is provided. Firstly, a mixture of a first reactant and a second reactant and high-temperature water at an outlet of a heating furnace (10) are mixed and are heated to a reaction temperature, the mixture is connected to a supercritical hydrothermal synthesis reactor (14), and a product at an outlet of the supercritical hydrothermal synthesis reactor enters a heat regenerator (9); hot water at an outlet of a low-temperature section of the heating furnace (10) first enters the heat regenerator, and then enters a high-temperature section of the heating furnace so as to be continuously heated to a set temperature; fluid at the pipe side outlet of the heat regenerator separately passes through a heat exchange coil in a first reactant modulation pool (1) and a steam generator (2) in a waste heat power generation system (20).

Abstract: A system for preparing nanoparticles by supercritical hydrothermal synthesis is provided. Firstly, a mixture of a first reactant and a second reactant and high-temperature water at an outlet of a heating furnace (10) are mixed and are heated to a reaction temperature, the mixture is connected to a supercritical hydrothermal synthesis reactor (14), and a product at an outlet of the supercritical hydrothermal synthesis reactor enters a heat regenerator (9); hot water at an outlet of a low-temperature section of the heating furnace (10) first enters the heat regenerator, and then enters a high-temperature section of the heating furnace so as to be continuously heated to a set temperature; fluid at the pipe side outlet of the heat regenerator separately passes through a heat exchange coil in a first reactant modulation pool (1) and a steam generator (2) in a waste heat power generation system (20).

Abstract: A supercritical water oxidation treatment system for organic wastewater with a high salinity crystallizes high-salinity wastewater by a low temperature of liquid oxygen, and decreases an inorganic salt content in the wastewater. Under supercritical water conditions, a hydrocyclone (4) separates most precipitated solid salts in the wastewater, so effectively prevents pipes and the tubular reactor (22) after the hydrocyclone (4) from plugging. Inorganic salts are able to be continuously separated from the system by the hydrocyclone (4) at the bottom of a desalination device, In addition, excess oxygen and gaseous products CO2 are recovered by a separation recovery part. The reaction time and the reaction temperature of supercritical water oxidation reaction are lowered due to the installation of a simple post-treatment unit (37). Moreover, the heat of the reactor effluent with a high temperature is recovered in the system, so operation cost of the system is reduced evidently.

Abstract: A supercritical water oxidation treatment system for organic wastewater with a high salinity crystallizes high-salinity wastewater by a low temperature of liquid oxygen, and decreases an inorganic salt content in the wastewater. Under supercritical water conditions, a hydrocyclone (4) separates most precipitated solid salts in the wastewater, so effectively prevents pipes and the tubular reactor (22) after the hydrocyclone (4) from plugging. Inorganic salts are able to be continuously separated from the system by the hydrocyclone (4) at the bottom of a desalination device, In addition, excess oxygen and gaseous products CO2 are recovered by a separation recovery part. The reaction time and the reaction temperature of supercritical water oxidation reaction are lowered due to the installation of a simple post-treatment unit (37). Moreover, the heat of the reactor effluent with a high temperature is recovered in the system, so operation cost of the system is reduced evidently.

Abstract: A countercurrent tank type supercritical water reactor with a sacrificial lining, comprising a cylinder body and a catalyst tank arranged inside, the upper part of the cylinder body is connected with a top cover, and the lower part of the cylinder body is connected with a spherical head, the inner side of the cylinder body, the inner side of the spherical head and the inner side of the top cover constitute the inner wall of the reactor, wherein the inner wall of the reactor is provided with a high temperature resistance and thermal insulation coating layer, the inner wall of the high temperature resistance and thermal insulation coating layer is provided with a sealing coating layer, and the inner wall of the sealing coating layer is provided with the sacrificial lining. The reactor is of a countercurrent tank type, which can prevent the reactor blockage caused by salt deposition.