System and method for preparing high-calorific-value synthesis gas through calcium-based chemical-looping gasification of carbon-containing fuel

Abstract

The invention relates to a system and a method for preparing high-calorific-value synthesis gas through calcium-based chemical-looping gasification of carbon-containing fuel. The system comprises a reactor, a combustion device, a gasification device, a reversing valve, a gas inlet pipe and an output pipe. A first connector and a second connector are vertically arranged the outer side wall of the reactor, a combustor is arranged at the top in the reactor, and a calcium-based adsorbent bed layer is arranged in the middle of the reactor; one end of the combustion device is connected with a firstjoint of the reversing valve, and the other end is connected with one of the first interface and the second interface; one end of the gasification device is connected with a second joint of the reversing valve, and the other end is connected with the other one of the second interface or the first interface; the air inlet pipe is connected with a third joint of the reversing valve, a first valve and a first induced draft fan are arranged on the air inlet pipe, and the output pipe is connected with a fourth joint of the reversing valve; the first joint and the second joint of the reversing valveare oppositely arranged, and the third joint and the fourth joint of the reversing valve are oppositely arranged. The system and the method have the beneficial effects that the wear loss activity ofthe calcium-based adsorbent is effectively reduced, and the function that the fluidized state of the system is extremely difficult to control is reduced.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency conversion and utilization of carbon-containing fuels, and relates to a system and method for preparing high calorific value synthesis gas by calcium-based chemical chain gasification of carbon-containing fuels. Background technique [0002] Power generation technologies using natural gas as fuel, such as combined cycle power generation, combined heat and power generation, and natural gas distributed power generation facilities, have energy efficiency advantages over coal. Studies have shown that the thermal efficiency of large-scale combined cycle power plants using natural gas as raw material can be as high as 61%; in combined heat and power plants, natural gas conversion efficiency can exceed 80%; small-scale gas-fired internal combustion engines or aeroderivative gas turbines using natural gas as raw material for direct conversion The efficiency can reach 45%. This is of great signifi...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the use of high calorific value synthesis gas as an alternative fuel for natural gas will usher in a broad application market with the surge in demand for natural gas; Faced with technical constraints such as serious wear and deactivation of calcium-based adsorbents, high difficulty in controlling the fluidized state of the double bed, and high system investment costs, it is difficult to quickly realize commercialization

Images