45results about How to "Low gas resistance" patented technology

The invention discloses a method and a catalyst for simultaneously purifying volatile organic contaminants in the air and ozone under room temperature and application thereof. The purifying method is that: ozone is catalytically decomposed under room temperature to generate highly active oxygen atoms to further oxidize volatile organic contaminants in the air and at last carbon dioxide and water are generated; the catalyst takes three-dimensional porous metal as a vector, activated carbon, silicon oxide, aluminum oxide and compound materials thereof as a coating and transition metal oxides ofMn, Cu, Fe, Ni and Co as active components. The method can remove organic contaminants and ozone under room temperature at the same time without heating, the operation process is simple and the removal rate of ozone and organic contaminants is high. Meanwhile, the catalyst of the invention is prepared by impregnation, wherein, the process is simple; the catalyst has large specific surface area, low air resistance, excellent performance and low cost and can be widely applied to purifying industrial organic waste gas and organic contaminants in the rooms.

A steel-making multifunctional circular seam type air supply unit belongs to the steel-making technique field, and comprises a gas ejector pipe, a mounting flange, an air separation chamber and an air inlet chamber, wherein, the gas ejector pipe consists of 2 to 5 layers of pipes which are sheathed concentrically; the pipe in the innermost layer is called a central pipe; the seam width among circular seams among all the layers of the pipes is 0.2 to 3.0mm. A spot or a rib resurface-welded by stainless steel is used for ensuring the precise location of seam width and for preventing molten steel from moistening the interior wall of steel pipes, thus not easy to be jammed by pouring in. The gas ejector pipe is connected with the mounting flange which is connected with the air separation chamber used for distributing the air coming from the air inlet chamber to enter each circular seam of the gas ejector pipes to be sprayed out; and the air separation chamber is connected with the air inlet chamber. The steel-making multifunctional circular seam type air supply unit has the advantages of raising the furnace campaign to over 10000 with maximum over 30000 from 2000; and the complex blowing rate is 100 percent. The bottom blowing air supply unit is not replaced in the whole furnace campaign period, thus solving the problem of short working life of the combined blown converter, which is also a worldwide problem in metallurgy.

The invention discloses a planar otter board packing type crossflow super-gravity rotating packed bed, as well as the application thereof. The rotating packed bed comprises a rotating packed bed shell, a motor and a rotating shaft; the rotating shaft positioned in the shell is of a hollow structure, the middle of the rotating shaft is inserted with a middle water pipe with an opening, the water pipe is provided with a liquid inlet, and small holes are distributed on the rotating shaft. Planar otter boards are fixed on the rotating shaft, and are horizontally arranged, and axial distances are kept among the otter boards. The planar otter board packing type crossflow rotating packed bed can achieve the mass transfer and the heat transfer between gas and liquid, and improved dust removal efficiency, and can avoid the high loss of gas resistance, so as to obtain higher heat transfer and mass transfer coefficients and higher dust removal efficiency under the lower gas resistance, thereby having the value of being widely spread and applied in the industry.

The invention provides a flexible glass fiber base catalyst used for VOCs catalytic combustion and a preparing method and application thereof. The catalyst has high activity, high heat stability and high mechanical performance, and is applied to the field of catalytic combustion for VOCs removal. A skeleton glass fiber of the catalyst is of a three-dimensional hole-like structure, and is high in porosity, and high in flexibility. When a catalytic combustion device operates, heat transfer is good, swelling coefficient is low, the catalyst is not sintered easily, and for some organic waste gas containing smoke, dust does not deposit on the surface of the catalyst easily.

The invention discloses an SCR denitrification device which comprises a gas inlet mixing section, a rotating cylinder, a fan impeller, a rectification section and a catalysis section. A reducing agent supply pipe and a fixing frame are arranged inside the gas inlet mixing section, the outlet end of the reducing agent supply pipe is fixed to the fixing frame, the reducing agent supply pipe is led out of the gas inlet mixing section; the rotating cylinder is rotationally assembled at the outlet end of the reducing agent supply pipe, a plurality of spraying pipes are connected to the side wall of the rotating cylinder, a plurality of backlash spraying holes are uniformly formed in the side wall of each spraying pipe, and the axial lead of each backlash spraying hole and the axial lead of the rotating cylinder are orthogonal; a hub of the fan impeller is rotationally assembled on the side wall of the reducing agent supply pipe; the rectification section and the gas inlet mixing section are connected, and a rectification device is arranged inside the rectification section; one end of the catalysis section is connected with the rectification section, and the catalysis section is filled with a catalyzer module. According to the SCR denitrification device, the sprayed reducing agent can be mixed with boiler flue gas to be uniform within a short period of time, and the denitrification efficiency can be improved.