A discharge device for supercritical water oxidation system and its control method
A supercritical water oxidation and discharge device technology, applied in control/regulation systems, non-electric variable control, control/manipulation systems, etc., to achieve the effect of ensuring safety and cooling
Active Publication Date: 2021-01-19
XI AN JIAOTONG UNIV
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Problems solved by technology
As for how the high-temperature and high-pressure discharge fluid can enter the discharge device safely and reliably, how to make the discharge device run smoothly during the emergency discharge process, how to realize the functions of safely cooling, speeding down, and reprocessing the discharge fluid, and how to ensure high temperature The operation of the high-pressure fluid emergency relief device does not have serious adverse effects on the downstream system, etc. There are no relevant reports, so the system control of the high-temperature and high-pressure fluid emergency relief device needs to be established urgently
Method used
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Embodiment Construction
[0037] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0038] Such as figure 1 As shown, a control method for a discharge device of a supercritical water oxidation system, including discharge control, spray control, overflow control and cleaning control;
[0039] The discharge control includes the start-up control of the first and second discharge pipeline measurement and control instruments 1 and 2 for the sprinkler pump 9 motor;
[0040] The spray control includes the control of the opening of the spray valve 8 by the measurement and control instrument 3 of the discharge device and the close control of the motor of the spray pump 9;
[0041] The overflow control includes the control of the overflow valve 6 by the liquid level measurement and control instrument 4;
[0042] The cleaning control includes the control of the liquid level measureme...
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A discharge device used for a supercritical water oxidation system and a control method thereof are provided. The control method comprises: 1) a step of graded feeding, namely a step of feeding overpressure discharge fluids generated by pipelines of different pressure levels in the supercritical water oxidation system into the discharge device in a normal preparation state through independent discharge pipelines, with the discharge pipelines corresponding to the pressure levels one to one; 2) a step of spraying and cooling, namely a step of, when an overpressure release fluid flows into any one of the discharge pipelines, starting a spray pump to spray cooling water into the discharge device through a spray pipeline, and adjusting and controlling the spray amount according to operation safety threshold values of the operation parameters of the discharge device; 3) a step of completing overpressure discharge, namely a step of, when the time when the operation parameters of the dischargedevice are not higher than the operation safety threshold exceeds the stable time threshold, completing the discharge of the overpressure fluids and turning off the spray pump to stop spraying.
Description
technical field [0001] The invention relates to a control method for a supercritical water oxidation system, in particular to a discharge device for a supercritical water oxidation system and a control method thereof. Background technique [0002] Supercritical water oxidation technology is an efficient and clean high-concentration refractory organic matter treatment technology. Through supercritical water oxidation reaction, organic matter is quickly and completely converted into harmless CO 2 , N 2 、H 2 O and other small molecule compounds. Due to the incomparable technical advantages of other conventional technologies such as incineration and wet oxidation, supercritical water oxidation technology is widely used in various high-concentration, refractory wastewater, solid waste and hazardous waste treatment fields. However, due to the high temperature and high pressure operating conditions, the system may occasionally have an emergency during operation, causing the inte...
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IPC IPC(8): C02F1/72G05D27/02B09B3/00A62D3/38
CPCA62D3/38B09B3/00C02F1/008C02F1/72G05D27/02
Inventor 王树众徐甜甜张熠姝李建娜宋文瀚崔成超蒋卓航
Owner XI AN JIAOTONG UNIV