Methane and oxygen pre-mixer
A technology of oxygen premixer and premixer, which is applied in gas and gas/steam mixing, fluid mixer, mixer, etc., which can solve problems such as insufficient contact mixing and inability to mix gas molecules horizontally
Inactive Publication Date: 2009-10-21
TSINGHUA UNIV
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Problems solved by technology
Although this type of design achieves the purpose of explosion-proof and premixing to a certain extent, the mixing of two gases in a large space by such cross-flow or counter-flow contact is not sufficient, and the subsequent natural development cannot make the gas reach the molecular level. horizontal mix
Method used
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Embodiment
[0034] Using the methane and oxygen premixer of the present invention, the inlet distribution system of the premixer adopts annular gas distribution design and swirl gas distribution design respectively. The annular gas distributor has three layers of concentric rings, and each ring has 60 gas injection holes with a diameter of 1mm. The deflector of the swirling gas distributor has 24 gas channels, the channel size is 1mm*1mm, and the diameter of the central cylindrical cavity of the deflector is 15mm. The gas adopts 99.99% methane and oxygen provided by Beijing Beiwen Gas Factory; the gas flow is controlled by the D07 mass flowmeter of Beijing Qixing Huachuang Electronics Co., Ltd., and the flow rate of methane and oxygen is 15L / min; the mixed gas passes through Shanghai Gas chromatograph type 7890II of Tianmei Scientific Instrument Co., Ltd. was used for analysis. A chromatographic sampler was used to randomly collect 10 samples from the gas outlet of each premixed layer fo...
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Abstract
A methane and oxygen premixer, which is mainly composed of a shell, a gas distribution system, a heat exchange system and a porous gas distribution plate; the gas distribution system adopts a swirling or circular gas distribution system; Oxygen intake system, upper distributor and lower distributor; circulation gas distribution system is composed of methane and oxygen respectively central feed pipe, cross feed pipe and annular gas distributor; heat exchange system is composed of upper partition, lower partition Plate, central inner tube, outer tube, metal fins, heat exchange medium inlet tube and heat exchange medium outlet tube; after methane and oxygen are mixed in a small space through the gas distribution system, they pass through the central inner tube, A simulated fluidized bed composed of outer tubes and metal fins flows upward in zigzags and achieves molecular level mixing at the outlet. The invention effectively improves the pre-mixing effect, ensures the flame retardancy and explosion-proof of the pre-mixing chamber, and has a good effect in the industry of partial oxidation of methane to synthesis gas.
Description
technical field [0001] The invention relates to an industrial methane and oxygen premixer, which belongs to the technical field of mixing industrial flammable and explosive gases. Background technique [0002] The safe and efficient premixing of methane and oxygen plays an important role in the industrialization of partial oxidation of natural gas to synthesis gas. The product of partial oxidation of natural gas to synthesis gas is a non-equilibrium product, which is very sensitive to local temperature and chemical composition, and the mixing effect of methane and oxygen directly affects the selectivity and yield of the product. When the mixing effect is not good, there will be local excess of methane or local excess of oxygen inside the adiabatic reactor. The former will lead to a decrease in methane conversion rate, and the latter will lead to a decrease in product selectivity. In general, no matter what happens, mixing Poor results will reduce the yield of the product. ...
Claims
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IPC IPC(8): B01F3/02B01F5/00C01B3/36B01F23/10
Inventor 程易丁石金涌
Owner TSINGHUA UNIV