Methane and oxygen pre-mixer

An oxygen premixer and premixer technology, which is applied in the directions of gas and gas/vapor mixing, fluid mixer, mixer, etc., can solve the problems of inability to mix gas molecules horizontally and insufficient contact mixing.

Inactive Publication Date: 2008-02-20
TSINGHUA UNIV
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AI Technical Summary

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 c

Method used

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  • Methane and oxygen pre-mixer
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  • Methane and oxygen pre-mixer

Examples

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[0033] Example

[0034] Using the methane and oxygen premixer of the present invention, the gas inlet distribution system of the premixer adopts annular gas distribution design and swirling 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 cyclone 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. The flow of methane and oxygen are both 15L / min; the mixed gas passes through Shanghai The 7890II gas chromatograph 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 prem...

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Abstract

The present invention relates to a methane and oxygen pre-mix device, mainly consists of a casing, a gas distributed system, a heat exchange system and a multiorifice gas distribution plate; the gas distributed system adopts the rotational flow or the circular flow gas distributed system; the rotational flow gas distributed system consists of a methane air intake system, an oxygen air intake system, an upper distributor and a lower distributor; the circular flow gas distributed system consists of center feed pipes, cross feed pipes and ring gas distributor of the methane and the oxygen; the heat exchange system consists of an upper separator, a lower separator, a centre internal pipe, an external pipe, a metal fin, a heat exchange medium inlet pipe and a heat exchange medium outlet pipe; via the gas distributed system, the methane and the oxygen have a preliminary mixture in a smaller space, then by the stimulant fluidized bed consisting of the centre internal pipe, the external pipe and the metal fin, circuitously flowing upwards, achieving a molecular level mixture at the exit. The present invention effectively increases the pre-mix effect and guarantees the inflaming retarding and explosion prevention of the pre-mix chamber, having a good function in the industry of methane partial oxidation to syngas.

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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Application Information

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IPC IPC(8): B01F3/02B01F5/00C01B3/36B01F23/10
Inventor 程易丁石金涌
Owner TSINGHUA UNIV
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