A supercritical water online flow test device

Abstract

An on-line flow test device for supercritical water, comprising a main body of the device and a real-time online sampling system, the main body of the device includes a test pipe section, a plurality of electric heaters are arranged on the outer circumference of the front section of the test pipe section, and a cooling water jacket is arranged on the outer circumference of the rear section of the test pipe section, The test pipe section is provided with several thermocouples and several pressure taps, and the thermocouples at least include thermocouple one for testing the temperature of the pipe wall, thermocouple two for testing the temperature of the fluid at the pipe wall, and thermocouple three for testing the temperature of the fluid at the inner axis of the pipe; The real-time on-line sampling system includes a number of sampling probes penetrating into the test pipe section. The sampling probes include at least one sampling probe arranged opposite to the thermocouple to sample the fluid near the wall and three opposite to the thermocouple. The second sampling probe for sampling the fluid at the axis of the tube, each sampling probe is connected with an independent sampling bottle. The invention can intuitively grasp the microscopic properties of material corrosion products and inorganic salt crystal particles, and the distribution laws of fluid temperature field, pressure field and concentration field.

Description

technical field [0001] The invention relates to the technical fields of energy, environment and chemical industry, in particular to an online flow test device for supercritical water. Background technique [0002] Supercritical water oxidation has a wide range of treatment, and almost all wastes containing organic matter can be treated by this technology. This technology has excellent effects in the treatment of pollutants such as phenolic compounds, polychlorinated biphenyls, pesticides and fuel intermediate aniline, sludge treatment and human metabolites. Whether it is from the perspective of sustainable development of the environment or from the perspective of industrial development, supercritical water oxidation technology is a promising green and environmentally friendly new technology. [0003] Supercritical water oxidation treatment technology has the following unique advantages: [0004] 1. The reaction speed is extremely fast and the removal rate is high. In the ...

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Problems solved by technology

[0010] In order to solve the problem that the fluid flow information during the operation of the supercritical water system cannot be obtained accurately, the purpose of the present invention is to provide a supercritical water online flow test device, through the design of the real-time online sampling system, the axial and Real-time test and analysis of circumferential fluid concentration field distribution; through the setting of detachable sample strips, the capture and collection of corrosion products and inorganic salt crystal deposition products during the reaction process are realized, which is convenient for later sampling for test analysis; through electric heaters and The setting of the cooling water jacket forms hot / cold wall conditions at different temperatures, thereby affecting the corrosion of the fluid and the characteristics of salt crystal deposition; through the setting of thermocouples at different positions and lengths, the fluid in the axial direction during the flow of supercritical water can be realized. On-line test of the distribution law of the temperature field and the circumferential direction; through the setting of multi-point pressure taps, the pressure difference changes of different pipe sections during the operation of the supercritical water system can be detected in real time, so as to facilitate the judgment of pipe blockage

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