Supercritical anti-corrosion testing device and testing method

Abstract

The invention discloses a supercritical anti-corrosion testing device, and relates to the technical field of supercritical water oxidation. The supercritical anti-corrosion testing device is used for enabling testing to be conducted in a continuous and long-period mode when anti-corrosion capacity testing is conducted on materials of a supercritical water oxidation device. The supercritical anti-corrosion testing device comprises a testing kettle and a testing rack arranged in the testing kettle which is provided with a feed opening and a discharge opening, the side wall of the testing kettle is further provided with an adjustable heating device, the adjustable heating device comprises a low-temperature heating portion corresponding to a salt settling area and a high-temperature heating portion corresponding to a testing area, the heating temperature of the high-temperature heating portion is larger than supercritical temperature of a solution, and the heating temperature of the low-temperature heating portion is smaller than the supercritical temperature of the solution. A supercritical anti-corrosion testing method adopts the supercritical anti-corrosion testing device for conducting supercritical anti-corrosion testing on test pieces. The supercritical anti-corrosion testing device is used for conducting anti-corrosion capacity testing on the materials of the supercritical water oxidation device.

Description

technical field [0001] The invention relates to the technical field of supercritical water oxidation, in particular to a supercritical anti-corrosion testing device and a testing method. Background technique [0002] Supercritical water oxidation treatment technology is an important means of sewage treatment. Its principle is to heat and pressurize the sewage to a supercritical state, and then introduce air, oxygen, hydrogen peroxide and other oxidants to decompose the organic matter in the sewage into H 2 O, CO 2 , N 2 And other non-toxic small molecular inorganic substances, so as to realize the sewage treatment. [0003] In the supercritical state, when the temperature of the sewage exceeds 450°C, the solubility of the inorganic salts in the sewage will be significantly reduced. Therefore, the inorganic salts in the sewage in the supercritical water oxidation device will be precipitated in solid form and attached to the On the inner wall of the supercritical water oxid...

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Problems solved by technology

[0004] However, the traditional supercritical water oxidation device is generally fed vertically from the bottom. In the actual test, as the reaction progresses, the concentration of inorganic salts inside the reaction chamber will increase, and the inorganic salts will continue to precipitate and settle in the reaction chamber. bottom, thus forming a salt-sinking area; when the inorganic salt accumulates to a certain extent, it will block the feed pipe, resulting in the test being unable to be carried out continuously for a long period of time

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