A plant heat treatment device for soil heavy metal restoration

Abstract

The invention discloses a soil heavy metal remediation plant heat treatment device coupling the medium-temperature gasification and a high-temperature chemical looping. The device is formed by coupling a medium-temperature gasification reactor and a high-temperature chemical-looping reactor, the high-temperature chemical-looping reactor comprises a chemical-looping reduction reactor, a chemical-looping air reactor, a primary inertia separator, a secondary cyclone separator, a primary return pipe and a secondary descending pipe, and the medium-temperature gasification reactor is communicated with the chemical-looping reduction reactor and a biomass spiral feeder; the chemical-looping reduction reactor is connected with a chemical-looping oxygen carrier feeder, an outlet of the chemical-looping reduction reactor is connected with the primary inertia separator and the secondary cyclone separator, and the primary inertia separator is communicated with a primary descending pipe; the other end of the primary descending pipe is communicated with the chemical-looping air reactor, the secondary cyclone separator is communicated with the secondary descending pipe, and the secondary descending pipe is communicated with the medium-temperature gasification reactor. According to the invention, the gradient utilization of energy, the reforming and upgrading of the gasified products, and the resource utilization of the soil heavy metal remediation plants are realized.

Description

technical field [0001] The invention relates to a heat treatment device for repairing plants in the field of energy and environmental protection, in particular to a heat treatment device for soil heavy metal repairing plants. Background technique [0002] With the large-scale promotion and application of phytoremediation technology, the problem of post-harvest disposal of phytoremediation plants has arisen as the times require. If a suitable post-production disposal device is not developed, the enriched heavy metals will return to the environment, which will not only cause a waste of human, material and financial resources, but also cause secondary pollution to the environment. [0003] The disposal of restoration plants mainly includes compressed landfill, incineration, composting, liquid phase extraction and pyrolysis. These technologies have been developed for many years, and the technical routes are relatively mature, but there are some problems that cannot be ignored. ...

AI Technical Summary

Problems solved by technology

It can be seen that the traditional chemical looping gasification method will not be conducive to the enrichment of heavy metals to the bottom slag, which will affect the recovery rate of heavy metals

[0006] (2) The migration and transformation rules of heavy metals in chemical looping gasification atmosphere are complex

Directly gasify the repair plant chemical chain, the process includes not only the primary gasification reaction of fuel and gasification agent, but also the secondary gasification reaction of gasification products and oxygen carrier, the reaction atmosphere is richer, and the reaction process is more efficient. This will inevitably lead to the further complexity of the migration and transformation mechanism of heavy metals, which will easily cause heavy metals to escape into the environment along with flue gas and fly ash

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