A combined cycle device and method for coal gasification to synthesis gas and chemical looping oxygen production-hydrogen production

Abstract

The invention discloses a coal gasification-to-synthesis gas and chemical chain-to-oxygen-hydrogen combined cycle apparatus and a coal gasification-to-synthesis gas and chemical chain-to-oxygen-hydrogen combined cycle method. With the apparatus and the method of the present invention, the high investment and the high energy consumption deep-cooling air separation oxygen production unit are eliminated, and the system efficiency is beneficially improved. Compared to the traditional coal gasification-to-hydrogen apparatus, the apparatus of the present invention has the following advantages that only three processes such as gasification, combustion and water decomposition hydrogen production are required to be performed, such that the process is simple; the H2 purity is substantially increased and is up to more than 99%; the high purity CO2 capture is achieved so as to substantially reduce the CO2 emission; the high purity O2 is produced, the purity is much higher than the oxygen produced through the deep cooling air separation, and the purity of the prepared synthesis gas is higher than the purity of the synthesis gas prepared by the traditional coal gasification apparatus; the apparatus of the present invention is adapted to the variable load operation of the coal gasification furnace; when the apparatus works in the pressurization state, the pressure can be determined according to the requirement of the gasification furnace, such that the purities of the produced CO2, the produced O2 and the produced H2 cannot be affected; and the ratio of the synthesis gas to the H2 can be flexibly adjusted.

Description

technical field [0001] The invention relates to the field of coal gasification to synthesis gas and hydrogen, in particular to a combined cycle device and method for coal gasification to synthesis gas and chemical chain oxygen production-hydrogen production. Background technique [0002] my country is a country where coal is the main primary energy source, and the conversion and utilization of coal is an important pillar of national economic development. However, the current coal conversion process in our country generally has problems such as low efficiency and heavy pollution. To achieve sustainable development, we must vigorously develop clean coal technology. As one of the core technologies for the development of clean coal technology, coal gasification is the basis and basis for the development of industrial processes such as coal-based bulk chemicals and liquid fuel synthesis, integrated gasification combined cycle (IGCC) power generation systems, polygeneration system...

AI Technical Summary

Problems solved by technology

Although the technology is mature, the process is complicated, the energy consumption is high, the efficiency of hydrogen production is low, and a large amount of CO is emitted into the environment. 2 , aggravating the global warming effect

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