A multifunctional inorganic salt crystallization-deposition comprehensive test device

Abstract

A multifunctional inorganic salt crystallization-deposition comprehensive test device, including a kettle cover and a kettle body, the kettle cover is provided with a supercritical water inlet channel, a salt solution inlet channel, a water outlet channel, an additive inlet channel, a pressure gauge interface and a safety valve interface, a sampling probe is provided at the end of the water outlet channel; a mixing agitator is provided in the kettle body, an ultrasonic generating device, an electromagnetic field generating device and an electric heater acting on its side wall are provided on the outside, and a The detachable inner liner, the cold / hot wall casing and the thermocouple casing penetrate the kettle cover and extend into the kettle body, and the sampling probe and the three measuring points are located at the bottom of the kettle body, close to the cold / hot wall casing The side wall of the kettle body is equipped with a visual optical unit, and a thermocouple measuring point is set in the kettle body. The invention can test the inorganic salt crystallization and deposition process on-line, helps to solve the problem of inorganic salt deposition and blockage in SCWO technology, realizes safe, long-term and stable operation of the system, and improves economy and safety.

Description

technical field [0001] The invention belongs to the technical fields of energy chemical industry, synthetic materials and environmental protection, and in particular relates to a multifunctional inorganic salt crystallization-deposition comprehensive testing device. Background technique [0002] Water environment protection is an issue of widespread concern to human society. However, high-concentration organic wastewater poses a threat to water resources. Using existing biological treatment methods, substances with poor biodegradability and relative molecular masses ranging from several thousand to tens of thousands Handling is more difficult. [0003] Supercritical water (Supercritical Water, referred to as SCW) is a special form of water above the critical state (T=374.15°C, P=22.12MPa). In this form, the density of water decreases, the viscosity decreases, the diffusivity increases, the ion product increases by several orders of magnitude, and the number of hydrogen bond...

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Problems solved by technology

[0007] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a multifunctional inorganic salt crystallization-deposition comprehensive test device to solve the problems of metal equipment corrosion, inorganic salt crystallization and deposition on the surface of equipment and pipelines, on the one hand Different types of additives, different auxiliary methods, different wall temperatures, different materials and surface roughness, and different degrees of turbulence can be used to control inorganic salt crystallization, The law of the influence of deposition; secondly, through the arrangement of sampling probes and temperature measurement points at different positions, the accurate collection of sample information in different regions can be realized; on the other hand, through the invention and design of visual optical components, in-situ observation of supercritical water can be realized. The phase behavior and crystallization evolution process of inorganic salts under certain conditions, and the in-situ detection of the properties of crystal particles, can intuitively grasp the behavior of inorganic salts, and then carry out the development of targeted prevention and control technologies, and finally solve the problem of inorganic salts in SCWO technology. Solve the problem of salt deposition and clogging, realize the safe, long-term and stable operation of the system, and improve the economy and safety of the system

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