Device and method for preparing oxygen by virtue of chemical looping air separation
A technology of air separation and chemical chain, applied in oxygen preparation, chemical industry, climate sustainability, etc., can solve the problems of high cost, complicated operation, high energy consumption, etc., and achieve the effect of simple structure, easy operation, and low energy consumption
Inactive Publication Date: 2014-06-18
NANJING UNIV OF SCI & TECH
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Problems solved by technology
Cryogenic rectification technology is currently the most mature technology for air separation to produce oxygen. This technology has a long history. The main principle is to use the different boiling points of nitrogen and oxygen in the air to liquefy the air and then conduct low-temperature rectification to separate nitrogen and oxygen. Purpose, its advantages are high product purity, high output, and many types, but its disadvantages are large investment, high cost, high energy consumption, and complicated operation
Oxygen production by pressure swing adsorption is an emerging oxygen production technology in the last 30 years. It has the advantages of quick start-up, simple operation, automation, and simple equipment manufacturing, but it has disadvantages such as low production capacity and high energy consumption.
The advantage of membrane separation technology is that it is easy to operate and can be carried out under normal temperature and pressure, but there are disadvantages such as difficult preparation of membrane materials and high cost.
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[0041] The metal oxide oxygen carrier particle used is PbO 2 , the particle size of the particles is 100μm~200μm, the feed amount of oxygen carrier is 500g, the flow rate of water vapor entering the bubbling fluidized bed reactor is 5 L / min, and the reaction temperature in the bubbling fluidized bed reactor is The temperature is 250~350°C, the operating pressure is 0.1~0.2MPa, the reaction temperature of the fast bed reactor is 400~500°C, the air flow rate input from the gas inlet of the fast bed reactor is 1L / min, and the operating pressure is 0.1MPa.
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Abstract
The invention discloses a device and a method for preparing oxygen by virtue of chemical looping air separation. The device comprises a bubbling fluidized bed reactor, a distribution plate, a first air distribution plate, a first cyclone separator, a fast fluidized bed reactor, a second cyclone separator, a returning mechanism, a second air distribution plate, a condenser, a waste heat boiler, an oxygen purifier and a gas bottle, all of which are connected together. The device and the method are used for preparing oxygen by virtue of the principle of the chemical looping air separation technology, and have the advantages of high efficiency, low energy consumption, simple operation and high produced oxygen purity.
Description
technical field [0001] The invention belongs to the technical field of chemical chain technology and air separation preparation of oxygen, and in particular relates to a device and method for preparing oxygen by chemical chain air separation. Background technique [0002] Oxygen is an important chemical raw material, which is widely used in chemical industry, metallurgy, medical and military fields, so the preparation of oxygen is a very critical technology. Air separation is currently the most important oxygen production technology, mainly including low temperature distillation, pressure swing adsorption and membrane separation technology. Cryogenic rectification technology is currently the most mature technology for air separation to produce oxygen. This technology has a long history. The main principle is to use the different boiling points of nitrogen and oxygen in the air to liquefy the air and then conduct low-temperature rectification to separate nitrogen and oxygen. ...
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IPC IPC(8): C01B13/08
CPCY02P20/10Y02P20/129
Inventor 王文举程明王杰
Owner NANJING UNIV OF SCI & TECH