Device and method for producing hydrogen through coal gasification

Abstract

The invention discloses a device and a method for producing hydrogen through coal gasification. The device comprises a gasification reactor (1), an adsorption reactor (2) arranged opposite to the gasification reactor (1), a calcination reactor (3) arranged between the gasification reactor (1) and the adsorption reactor (2), a gasification cyclone separator (4), an adsorption cyclone separator (5), an external heat exchanger (6), a gasification isolator (7) and an adsorption isolator (8). A high temperature synthetic gas inlet of the external heat exchanger (6) is connected with a high temperature synthetic gas outlet (D) of the gasification reactor (1). The method for producing the hydrogen through coal gasification comprises the following steps of: performing pyrolysis gasification reaction of coal particles; performing carbonation reaction on calcium-based adsorber particles; and performing calcinations reaction on calcium carbonate particles. By the device and the method, the coal particles are gasified to form high-quality hydrogen rich gas, and carbon dioxide is effectively captured.

Description

technical field [0001] The present invention is a device and method for coal gasification hydrogen production based on calcium-based adsorbent circulation, especially a device and method for separating three processes of coal gasification, calcium-based adsorbent capturing carbon dioxide and calcium carbonate calcination through a coal gasification hydrogen production device. method. Background technique [0002] Coal utilization technology produces a large amount of harmful substances, causing great harm to the ecological environment. The carbon dioxide emitted directly leads to the greenhouse effect, and the separation and treatment of carbon dioxide requires a large amount of energy. How to rationally use coal and reduce carbon dioxide emissions is the core of coal utilization technology. The key issue is that coal utilization technologies are mainly divided into direct combustion and indirect utilization, and indirect utilization is mainly realized through chemical loopi...

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Problems solved by technology

However, under normal pressure, the optimum gasification temperature of coal particles is above 900°C, while the optimum temperature for capturing carbon dioxide by calcium-based adsorbent is 600-650°C; in the gasification reactor, the gasification of coal particles and calcium The two processes of carbon dioxide capture by calcium-based sorbent particles are carried out simultaneously, and the mismatch between the two optimal reaction temperatures limits the application of this technology. The gasification of coal particles in the gasification reactor and the capture of carbon dioxide by calcium-based sorbent particles The effect is not ideal, the hydrogen content in the generated fuel gas is low, and the carbon dioxide content is high, resulting in a decline in quality

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