Indirect heat exchange type supercritical water oxidization system and control method

A supercritical water oxidation, indirect technology, applied in chemical instruments and methods, oxidation treatment of sludge, oxidation water/sewage treatment, etc., can solve the problems of high temperature and pressure matching requirements, high process parameters, etc., to achieve low design power and guarantee Safety, small investment effect

Active Publication Date: 2016-07-20
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0007] The purpose of the present invention is to provide an indirect heat exchange supercritical water oxidation system and its control method in view of the high process parameters of the indirect heat exchange supercritical water oxidation system in the background technology and the high requirements for temperature and pressure matching between the two processes

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  • Indirect heat exchange type supercritical water oxidization system and control method

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Embodiment Construction

[0039] The present invention is described in further detail below in conjunction with accompanying drawing:

[0040] see figure 1 , the indirect heat exchange supercritical water oxidation system of the present invention mainly includes the main process of supercritical water oxidation reaction, the intermediate medium process and other auxiliary pipelines, the main process of supercritical water oxidation reaction includes a material buffer tank 1 connected to a material pump 2, and the two There is a material buffer tank outlet control valve V1 between them, the material pump 2 is connected to the inner pipe of the preheater 3, the outlet of the inner pipe of the preheater 3 is connected to the inlet 1 of the desuperheater 4, and the outlet of the desuperheater 4 is connected to the inlet 1 of the reactor 5 The outlet of the reactor 5 is connected to the inner pipe of the regenerator 6, the outlet of the inner pipe of the regenerator 6 is connected to the pressure reducer 7,...

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Abstract

The invention discloses an indirect heat exchange type supercritical water oxidization system and a control method. The system mainly comprises a main supercritical water oxidization reaction flow and an intermediate medium loop. The control method comprises two-flow pressure and temperature increasing control, temperature and pressure reduction control and normal running control. The invention aims at an automatic control strategy for engineering practices of the indirect heat exchange type supercritical water oxidization system, and the concept of cyclic heating is adopted for a temperature increasing process of the system, so that investment in heating equipment is effectively reduced; mismatch between working pressure of two flows is avoided, and effectiveness of heat exchange between supercritical pressure fluids in an inner pipe and an outer pipe of a preheater / heat exchanger of a temperature increasing or temperature reduction stage of the system is ensured; process effects and system safety are ensured by effective control over reaction temperature and over-temperature protection over key equipment.

Description

【Technical field】 [0001] The invention belongs to the field of supercritical water treatment of organic waste, in particular to an indirect heat exchange type supercritical water oxidation system and a control method. 【Background technique】 [0002] Supercritical water (Supercritical Water, referred to as SCW) refers to the temperature and pressure are higher than its critical point (Tc = 374.15 ° C, Pc = 22.12MPa) in a special state of water. Supercritical water oxidation technology uses the special properties of supercritical water, such as low viscosity, low dielectric constant, and high diffusivity, to make the organic matter completely dissolved in it react with the oxidant in a rapid and thorough homogeneous phase, and the carbon element in the organic matter is transformed into Carbon dioxide is converted into carbon dioxide, elements such as chlorine, sulfur, and phosphorus are converted into corresponding inorganic salts, and most nitrogen elements are converted int...

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Application Information

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IPC IPC(8): C02F1/72C02F11/06C02F101/30
CPCC02F1/72C02F11/06C02F2101/30C02F2303/06
Inventor 王树众李艳辉杨健乔唐兴颖张洁王玉珍张拓
Owner XI AN JIAOTONG UNIV
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