Biomass and low-rank coal separation coupling heat transfer plate and low-grade iron ore co-pyrolysis system

Abstract

A biomass and low-rank coal separation coupling heat transfer plate and low-grade iron ore co-pyrolysis system comprises a carrier gas supply system 1, a pyrolysis system 2 and a pyrolysis product separation system 3, and the carrier gas supply system is connected with a low-rank coal bin, a biomass bin and an iron ore bin of the pyrolysis system through gas guide pipes; and the pyrolysis system is respectively connected with a baffle plate dust remover and a water-cooling coke quenching box of the pyrolysis product separation system through a pyrolysis carbonization furnace. Biomass is conveyed to an infrared heating furnace through a belt conveyor, a large amount of pyrolysis atmosphere containing an H element and alkali metal is generated, the pyrolysis atmosphere serving as a hydrogen source and a catalyst is blown into a pyrolysis carbonization furnace through carrier gas to participate in pyrolysis of low-rank coal, and the co-pyrolysis synergistic effect of the biomass and the low-rank coal can be improved through electric heating and infrared two-stage pyrolysis; and therefore, more high-quality oil and gas resources are generated. The pyrolysis system disclosed by the invention has important significance on scientific research and production practice application of co-pyrolysis of the biomass and the low-rank coal.

Description

technical field [0001] The invention relates to the technical field of renewable energy, in particular to a co-pyrolysis system of biomass and low-rank coal coupled with a heat transfer plate and low-grade iron ore. Background technique [0002] Pyrolysis is a way of clean utilization of energy. It is used in biomass and low-rank coal, and can generate a large amount of oil and gas resources, which can be supplemented in the oil and gas supply network. However, due to the high H / C and alkali metal content of biomass resources, the oil and gas produced by biomass pyrolysis have disadvantages such as low energy density and strong corrosion, while low-rank coal contains low H / C, resulting in tar with high content. High heavy components and ash content tend to block downstream pipelines easily. Based on the respective H / C characteristics of biomass and low-rank coal, and the catalysis of alkali metals on coal pyrolysis in a large number of pyrolysis studies, it is considered th...

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Problems solved by technology

In the existing indirect pyrolysis process, the heating rate is slow and the temperature field is unevenly distributed, so that the relative difference in heat transfer of the reactants during the pyrolysis heating process will also affect the quality of pyrolysis oil and gas

[0003] In addition, with the development of industry, the proportion of low-grade iron ore in my country is getting higher and higher, and the cost of its utilization is also increasing.

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