Supercritical oxidation wastewater treatment method
A technology of supercritical oxidation and supercritical water oxidation, which is applied in the direction of oxidized water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc. It can solve the problems of reducing equipment working efficiency, strong corrosion of equipment, affecting heat transfer, etc.
Pending Publication Date: 2021-06-01
杭州安及星环保科技有限公司
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Problems solved by technology
However, supercritical water oxidation needs to be under high temperature and high pressure conditions, especially organic matter containing halogen, sulfur or phosphorus, acid will be generated during supercritical water oxidation, causing strong corrosion of equipment, and salt precipitation in the reaction will affect transmission. Heat reduces the heat transfer rate, and in severe cases, the pipeline will be blocked, causing waste of water resources and reducing the working efficiency of the equipment
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[0026] Aiming at the deficiencies in the prior art, the present invention provides a supercritical oxidation wastewater treatment method, so that the organic matter in the waste liquid is fully fused with oxygen, so that the organic components in the waste liquid can be completely decomposed under appropriate temperature and pressure. Oxidation to CO 2 、H 2 0, N2 and inorganic salts and other substances, and increase the rate of critical oxidation reaction and reduce the reaction time.
[0027] In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:
[0028] As an implementation, such as figure 1 Shown, a kind of supercritical oxidation wastewater treatment method comprises the following steps:
[0029] Step 1, pretreatment of waste liquid, put the waste liquid and oxidant into the batching tank, mix the waste liquid and oxidant evenly, pressurize the batching tank, the batching tank has at least tw...
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The invention discloses a supercritical oxidation wastewater treatment method, which comprises the following steps of: pretreating waste liquid, putting the waste liquid and an oxidizing agent into a batching tank, uniformly mixing the waste liquid and the oxidizing agent, preheating a supercritical water reactor, preheating the supercritical water reactor containing a wastewater mixture, and carrying out supercritical water reaction on the waste liquid, letting the preheated wastewater enter the reactor from an outlet of the heater, carrying out gas-liquid separation and solid-liquid separation after reaction, discharging the effluent clean water, and CO2, N2 and other gases from the top of a gas-liquid separator. The method has the advantages that the waste liquid is pretreated, the waste liquid and the oxidizing agent are put into the batching tank and are uniformly mixed, so that organic matters in the waste liquid are fully fused with oxygen, and the flow and the pressure of the whole system are controlled by a gas booster pump and a pressure control device, separation and recovery of solid and liquid in the reaction process can be controlled by controlling pressure and temperature.
Description
technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a supercritical oxidation wastewater treatment method. Background technique [0002] Supercritical oxidation is an environmentally friendly wastewater treatment method. Supercritical water has strong dissolving power, high compressibility, viscosity close to water vapor, and density close to liquid water. Due to its strong dissolving power, it can be It is miscible with oxygen and organic matter, which can break the molecular chain of organic matter and decompose organic matter. Therefore, it is applied to the treatment of landfill leachate, and the removal rate of COD in landfill leachate reaches 99.61%. COD is also called chemical oxygen demand. Moreover, the organic pollution parameters that can be determined quickly, COD measures the amount of reducing substances that need to be oxidized in the water sample by chemical methods, so as to represent an indicator of ...
Claims
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Login to View More IPC IPC(8): C02F1/72
CPCC02F1/72C02F2209/02C02F2209/03C02F2209/40
Inventor 詹诗君
Owner 杭州安及星环保科技有限公司