Coal-based electric power and chemical product coproduction process capable of realizing zero discharge of CO2
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A zero-emission, chemical technology, used in the preparation of hydroxyl compounds, the preparation of carboxylic acids by carbon monoxide reaction, organic chemistry, etc.
Inactive Publication Date: 2013-08-07
EAST CHINA UNIV OF SCI & TECH
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This process is an integrated coupling between different disciplines and different industries, which solves the large amount of CO emissions in the existing
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Embodiment 1
[0052] Taking Dazhuang Coal as an example, the gasification unit uses CO 2 instead of H 2 O is used as a gasification agent to carry out coal gasification reaction at 1200-1600 ° C and 0.1-10 MP pressure. Dazhuang coal is one of the common coal types, with high carbon content and low hydrogen content. The elemental analysis of Dazhuang coal is as follows:
[0053] the element
C
H
N
S
O
Content (%)
72.4
3.4
1.4
0.9
3.1
[0054] Assuming that the coal processing capacity is 600,000 tons / year (based on 8,000 working hours per year, the processing capacity per hour is 75t / hr), the working condition data in the gasifier are as follows:
[0055] Operating data table
[0056]
[0057] Keeping the amount of coal processed, the oxygen-to-coal ratio constant, and the reaction temperature around 1600°C, CO 2 Gradually replace H 2 O (0%, 20%, 40%, 60%, 80%, 100% volume H in the table 2 O is replaced by the correspondin...
Embodiment 2
[0133] Taking Huangxian coal as an example, the gasification unit uses CO 2 instead of H 2 O is used as a gasification agent for coal gasification reaction at 1200-1600°C and 0.1-10MP pressure. Huangxian coal is also a common type of coal, which has low carbon content but high hydrogen and oxygen content. The elemental analysis of Huangxian coal is as follows:
[0134] the element
C
H
N
S
O
Content (%)
68
6.2
1.4
0.5
14.5
[0135] Also assuming that the coal processing capacity is 600,000 tons / year (based on 8,000 working hours per year, the hourly processing capacity is 75 t / hr), the working condition data is the same as that in Example 1.
[0136] Keeping the amount of coal processed, the oxygen-to-coal ratio constant, and the reaction temperature around 1600°C, CO 2 Gradually replace H 2 O, the main components of syngas are as follows:
[0137] Huangxian coal gasification using CO under the condition of fi...
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Abstract
The invention provides a coal-based electric power and chemical product coproduction process capable of realizing zero discharge of CO2. A new coal gasification process which uses CO2 instead of steam as a coal gasification agent is taken as the core; chemical production of chemical products such as methanol, acetic acid and the like, cogeneration by a gas turbine and a steam turbine, and output of CO used as a product are organically combined; and CO2 generated in combustion power generation, steam conversion and other procedures in the coproduction process is separated and enriched, and then is wholly conveyed to a gasifier and used as the coal gasification agent for cyclic utilization, thereby realizing zero discharge of CO2 in the whole process. The process integrally couples different sciences and different industries, solves the key technology that a large amount of greenhouse gas CO2 is discharged in the existing poly-generation process, and achieves the purposes of CO2 recycling and green energy source and chemical industry.
Description
technical field [0001] The present invention relates to a coal-based electric power and chemical co-production process, in particular, relates to a CO 2 The new coal gasification process that replaces water steam as the gasification agent is based on the tandem technology and engineering characteristic application of power generation and chemical production, forming a new process for the co-production of various products such as carbon-chemical raw materials, chemical products, and power output. Background technique [0002] With the rapid development of industrial production and people's extreme dependence on fossil fuels, the emission of CO2 is increasing day by day, resulting in the greenhouse effect. As the most important man-made greenhouse gas, CO2 emissions have increased by about 80% between 1970 and 2004, from 21 billion tons to 38 billion tons, and continue to increase. It is imminent to reduce CO2 emissions. At present, CO2 capture, storage and reuse technology i...
Claims
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