Zero-release organic wastewater treating device and zero-release organic wastewater treating method
A technology for organic wastewater treatment and zero discharge, which is applied in energy wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve problems such as high energy consumption, incomplete wastewater treatment, and inability to achieve energy saving.
Inactive Publication Date: 2013-01-02
NANJING NORMAL UNIVERSITY
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Problems solved by technology
The traditional supercritical organic wastewater treatment system needs to consume a lot of electric energy to heat and keep the device warm. At the same time, it needs a large amount of cooling water to cool the reactants, which consumes a lot of energy and cannot achieve the purpose of energy saving.
As a big tobacco country in my country, a large amount of wastewater is produced every year due to the production of tobacco flakes. The traditional processes mainly use biological treatment, chemical oxidation, incineration, wet oxidation, etc., because these processes have corresponding defects. Wastewater treatment is not enough Completely unable to meet higher requirements in terms of energy saving and emission reduction
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[0012] The organic wastewater treatment device of this embodiment is as figure 1 As mentioned above, the high-pressure plunger pump 1 is connected with the stop valve 2, the hot air heat exchange device 3, the front sleeve preheater 4 and the high temperature tube furnace 5 in sequence; the high temperature tube furnace 5 is connected with the front sleeve preheater 4 A loop is formed; the front casing preheater 4 is connected with the casing cooler 7 , the first stage filter 9 , the second stage filter 10 , the back pressure valve 11 and the gas-liquid separator 12 . The pore diameter of the first-stage filter 9 is 50 μm, and the pore diameter of the second-stage filter 10 is 5 μm.
[0013] The high-temperature tube furnace 5 adopts a dual-purpose heating device of solar energy and electric energy. The hot air heat exchange device 3 uses the remaining high-temperature steam in the tobacco sheet drying process to perform primary preheating on the waste water: the temperature ...
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The invention discloses a zero-release organic wastewater treating device and a zero-release organic wastewater treating method. The method is an environment-friendly technology which has a good organic wastewater treating effect by a supercritical technology. A reaction principle used by the invention is a supercritical water oxidation method. The method comprises the following steps of: preheating a reactor by the residual high-temperature steam of a factory and the afterheat of the reacted wastewater, directly charging the second-stage heat exchanged wastewater into a high-temperature tube furnace for supercritical oxidation, taking oxidated wastewater to be taken as a heat source again to be charged into a sleeve preheater to carry out heat exchange with the unreacted wastewater, and completing the whole wastewater treating technological process by a multi-stage filter and a gas-liquid separator. The aims of energy conservation and emission reduction can be achieved when the device disclosed by the invention is used on the treatment of the organic wastewater, the experimental determination shows that the treated wastewater completely reaches to the national discharge standard, and the generated wastewater can be directly charged into a cigarette factory powerhouse to be taken as fuel.
Description
technical field [0001] The invention relates to an environmental protection system with better treatment effect on organic waste water: a supercritical organic waste water treatment device and a method thereof. Background technique [0002] Super Critical Water Oxidation (SCWO) method is a novel water pollution control method proposed by American scholars Modell et al. in the mid-1980s. It has the characteristics of energy saving, high efficiency and strong applicability. Supercritical water oxidation treatment technology uses water in a supercritical state with a temperature of 374 ° C and a pressure of 22 MPa, which has the characteristics of high diffusivity, high solubility and low surface tension of gas and liquid, to oxidize and decompose organic waste, and convert which converts to H 2 O and CO 2 , to achieve the purpose of detoxification and harmlessness. [0003] Supercritical water oxidation has developed rapidly in European and American countries and has been w...
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IPC IPC(8): C02F9/10
CPCY02W10/37
Inventor 徐春燕崔文君于伟汤晓斌张金梁硕吴倩茹顾中铸
Owner NANJING NORMAL UNIVERSITY