Coal oxygen-free catalytic gasification method and system

Abstract

The present disclosure relates to the technical field of coal resources, in particular to a coal-free catalytic gasification method and system. Among them, the coal anaerobic catalytic gasification method includes feeding coal powder into the gasification device, making the coal powder undergo gasification treatment in the gasification device, and generating ash and gas, and passing the gas into the gas separation device to pass through the gasification device. The gas separation device separates the gas into dust and synthesis gas, and passes the synthesis gas into the gasification device, so that the synthesis gas undergoes gasification reaction in the gasification device, which improves the conversion rate of carbon; the ash and dust pass through into the calcination device, so that the ash and dust are calcined by the calcination device, and then the product produced by the calcination device is passed into the gasification device, so that the product undergoes a gasification reaction in the gasification device, further improving The conversion rate of carbon is improved, and the problems of high residual carbon in discharged ash and incomplete utilization of carbon in raw coal in the prior art are solved.

Description

technical field [0001] The present disclosure relates to the technical field of coal resources, in particular to a coal-free catalytic gasification method and system. Background technique [0002] With the rapid economic development and increasingly stringent environmental regulations, the demand for natural gas, a clean energy, is growing explosively. Catalytic gasification technology is an important way to cleanly and efficiently utilize coal. Catalytic gasification technology is used to make coal react with gasification agent at a relatively low temperature under the catalytic action of catalyst to generate high-concentration methane . [0003] The existing oxygen-free oxidation catalytic gasification process is to separate the synthetic gas from the crude gas, mix it with hot steam, and send it to the gasifier after being superheated to 850°C. Sensible heat maintains the gasification temperature at about 700°C; the gasification temperature is low, the reaction rate is ...

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Problems solved by technology

[0003] The existing oxygen-free oxidation catalytic gasification process is to separate the synthetic gas from the crude gas, mix it with hot steam, and send it to the gasifier after being superheated to 850°C. Sensible heat maintains the gasification temperature at about 700°C; the gasification temperature is low, the reaction rate is slow, and the stubborn carbon in the furnace is difficult to convert, and the synthesis gas can inhibit the carbon water reaction after returning to the furnace. If a higher carbon conversion rate is required A long gas-solid contact time is required, the residual carbon in the discharged ash is high, and the carbon in the raw coal is not fully utilized

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