Device for preparing hydrogen-rich gas by gasifying biomass under catalysis of high-temperature metallurgical slag particles and method

Abstract

The invention relates to a device for preparing hydrogen-rich gas by gasifying a biomass under the catalysis of high-temperature metallurgical slag particles and a method. The device comprises a downer reactor, a high-temperature slag particle storage chamber, a spiral biomass raw material feeder, a separator, a steam generator and a hydrogen-rich gas collector, wherein the high-temperature slag particle storage chamber and the spiral biomass raw material feeder are located above the downer reactor and are communicated with the top of the downer reactor; the separator is located below the downer reactor and is communicated with the bottom of the downer reactor; and the steam generator and the hydrogen-rich gas collector are located at two sides of the downer reactor and are respectively communicated with the downer reactor. The method in which the device is applied comprises the steps of respectively adding high-temperature metallurgical slag particles, biomass raw materials and steam into the downer reactor through a rotary molten slag granulating device, the spiral biomass raw material feeder and the steam generator; carrying out gasification reaction on the biomass raw materials under the catalysis of the high-temperature metallurgical slag particles to generate hydrogen-rich gas; and storing the hydrogen-rich gas into the hydrogen-rich gas collector. By using the method, waste heat of metallurgical slag is recycled in a chemical energy way, so that the recovery rate of the waste heat is relatively high, and the problems of low waste heat recovery rate and low recovery quality of a dry-method metallurgical slag treatment process are solved.

Description

technical field [0001] The invention relates to the fields of metallurgical engineering, energy conversion, environmental protection and energy saving, mainly relates to energy saving and emission reduction utilizing metallurgical process, and biomass energy conversion, and in particular to a device and method for producing hydrogen-rich gas by catalytic gasification of biomass with high-temperature metallurgical slag particles. Background technique [0002] The metallurgical industry is the pillar industry of my country's national economic development, and it is also a large energy-consuming, high-pollution, high-emission industry, facing severe pressure on energy conservation and emission reduction. Among them, metallurgical slag is the main waste discharged in the process of metal and alloy smelting. The discharged slag is not only huge in quantity, but also rich in high-quality heat. For example, the blast furnace discharges about 350kg of slag for every ton of pig iron ...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a method and device for preparing hydrogen-rich gas by catalytically gasifying biomass with high-temperature metallurgical slag particles as a heat carrier. As a heat carrier and catalyst, metallurgical slag particles are fed into steam to gasify biomass to produce hydrogen-rich gas, so as to effectively solve the problems of poor waste heat recovery efficiency and low quality in the existing dry process of slag treatment, as well as the solid heat carrier gasification process. The need for external heat supply and the problem that the catalyst is prone to carbon deposition and deactivation

Images