Heat energy recovery method for supercritical water oxidizing system

A technology of oxidation system and recovery method, which is applied in the field of energy and environment, can solve the problems of huge heat consumption, achieve the effect of reducing energy consumption, realizing heat energy balance, and realizing heat self-sufficiency

Active Publication Date: 2015-12-16
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI +1
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Problems solved by technology

However, to achieve the high temperature and high pressure reaction conditions of supercritical water oxidation requires a huge amount of heat

Method used

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  • Heat energy recovery method for supercritical water oxidizing system

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing:

[0029] The heat recovery process of the primary recovery system: In the heat energy recovery system of the supercritical water oxidation system, the concentrated waste liquid generated by the low-temperature multiple-effect distiller 2 is boosted by the waste liquid booster pump 4, and enters the fourth heat exchanger from the inlet channel 6-1. After the heater 6 is initially preheated, it is injected from the top inlet channel 10-2 of the water film reactor 10; 10-1 injecting, concentrating the organic matters and oxygen in the waste liquid to carry out the supercritical water oxidation reaction in the water film reactor 10. The distilled water is boosted by the distilled water booster pump 16 and divided into upper and lower branches. The evaporated water in the upper branch is regulated by the first regulating valve 5, and enters the fifth heat exchanger 15 from the inl...

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Abstract

The invention relates to the technical field of energy and environments, in particular to a heat recovery method for a low-temperature multi-effect distillation united supercritical water oxidizing system. Supercritical water oxidizing reaction heat is recovered by three stages of heat recovery systems, wherein the heat of the first-stage recovery system is recovered to preheat condensed wastewater drained from a low-temperature multi-effect distiller and upper-branch evaporable water; the second-stage recovery system recovers the remaining heat recovered by the first-stage recovery system, and the heat is used for heating heat source water; the third-stage recovery system is used for recovering the remaining heat recovered by the second-stage recovery system and recovering heat generated at the bottom of the low-temperature multi-effect distiller, and the heat is used for heating cooling water. Through step-by-step heat recovery, the recovered heat is utilized stepwise, and the energy consumption of the system is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of energy and environment, in particular to a method for recovering heat energy of a supercritical water oxidation system. Background technique [0002] The treatment of high concentration (chemical oxygen demand COD>2000mg / L), toxic and refractory organic wastewater is a recognized technical problem at home and abroad. Traditional organic wastewater treatment technologies (such as physical and chemical treatment technology, biological treatment technology, wet oxidation, incineration, etc.) have problems such as high cost, low degradation rate, and easy secondary pollution. Supercritical Water Oxidation (SCWO), as a new technology for treating organic wastewater, is one of the effective methods to solve this problem. [0003] Supercritical water oxidation is a method of "combustion" oxidation of organic matter with air or other oxidants under high temperature and high pressure conditions exceeding the c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04F24H1/00
Inventor 张凤鸣岳鹏飞冯东东陈顺权吴佩衡
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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