4results about How to "Improve oxidation efficiency" patented technology

The utility model belongs to industrial wastewater treatment technical field discloses a kind of Fenton oxidation pond packing shelf and Fenton reaction pond device, including packing shelf body and at least two hanging material layers, and packing shelf body includes upper shelf body and lower shelf body, and both are detachably connected along vertical direction, and upper shelf body top is provided with lifting connection structure;At least two hanging material layers are respectively arranged on upper shelf body and lower shelf body, and each layer hanging material layer includes multiple hanging material cross beams that are arranged in parallel along horizontal interval, and multiple filter bags are detachably and interval hung along the length direction of each hanging material cross beam, and filter bag interior is filled with zero-valent iron reagent, and raw water in oxidation pond can contact reaction with zero-valent iron reagent in its interior through the small hole of filter bag.The utility model effectively improves the contact efficiency of reaction reagent, reduces ferrous sulfate consumption, makes reaction process more sufficient, accelerates reaction rate, improves treatment effect;Meanwhile, it is convenient to quickly replace and supplement reaction reagent on packing shelf, and operation is simple.

The invention discloses a desulfurization ash resource utilization process which comprises the following steps: performing magnetic separation on desulfurization ash, and mixing with water to obtain first desulfurization ash slurry; adding a mixed solution of sodium acetate and hydrochloric acid, reacting to obtain second desulfurized fly ash slurry with acidic pH, and collecting CO2 generated in the reaction process; introducing air to oxidize the second desulfurized fly ash slurry at the temperature of 60-80 DEG C, and stirring to react to obtain third desulfurized fly ash slurry; performing solid-liquid separation on the third desulfurized fly ash slurry to obtain solid calcium sulfate and a mixed solution of calcium acetate and sodium chloride; adding sodium carbonate into the mixed solution of calcium acetate and sodium chloride, and performing solid-liquid separation after reaction to obtain solid calcium carbonate and the mixed solution of calcium acetate and sodium chloride; a mixed solution of calcium acetate and sodium chloride is collected and circularly used for preparing the first desulfurized fly ash slurry. According to the method, the resource utilization process of the desulfurized fly ash is optimized, generation of harmful gases such as sulfur dioxide and ammonia gas is avoided, and valuable calcium sulfate and calcium carbonate products are obtained.

The utility model relates to a kind of multi-directional fixed oxidation hanger in the technical field of oxidation hanger, comprising: installation top plate, its top end is symmetrically provided with threaded mounting hole;Fixed through-hole, it is symmetrically provided in the top end edge of the installation top plate;Connecting installation top block, it is by bolt in the top end middle part of the installation top plate;Electric telescopic rod, it is fixed in the top end of the connecting installation top block;Connecting hanger mechanism, it is movably inserted in the inboard of the fixed through-hole;Fixed reinforcing mechanism, it is by bolt in the top of the installation top plate, by the mutual cooperation between the installation top plate, fixed through-hole and connecting hanger mechanism being provided, can be connected and assembled between installation top plate and connecting hanger mechanism in actual use process, can be connected between installation top plate in multidirection, can be mounted to multiple workpieces, improve the oxidation efficiency of overall, it is convenient and fast to operate.

The application discloses a diesel oxidation catalyst for reducing N2O emission and a preparation method thereof. First and second catalytic coating layers of the catalyst are continuously coated on a carrier in sections, a third catalytic coating layer is located on the upper layer of the first catalytic coating layer, and a fourth catalytic coating layer is located on the upper layer of the second catalytic coating layer. The first and second catalytic coating layers are used for purifying HC / CO pollutants and oxidizing NOx into NO2. The third noble metal active component of the third catalytic coating layer is composed of Pt or a mixture of Pt and Pd, and the ratio of Pt / Pd is 5:1-1:0. The fourth noble metal active component of the fourth catalytic coating layer is one or more of Pt, Pd, Rh and Ru. The third catalytic coating layer is used for reducing the selectivity of the DOC catalyst to N2O when oxidizing NH3 and the selectivity to N2O when the HC-SCR reaction is performed. The fourth catalytic coating layer adopts a coating layer with N2O decomposition capacity, and the N2O selectively generated in the upstream section is decomposed into N2. The catalyst coating layers are mutually cooperative, have basic DOC catalytic performance, and can reduce N2O emission.