Cascade direct heat exchange hydrothermal reaction device

Abstract

The invention discloses a cascade direct heat exchange hydrothermal reaction device. The device consists of more than three hydrothermal reactors and a circulating pump, wherein a left valve and a right valve are mounted on the hydrothermal reactor, the left valve is connected with a left tee joint, the right valve is connected with a right tee joint, and a partition valve is connected between theleft tee joint and the right tee joint; the hydrothermal reactors are connected with the circulating pump in the following manner: an outlet of the circulating pump is connected with the left tee joint on the first hydrothermal reactor, the right tee joint on the first hydrothermal reactor is connected with the left tee joint on the second hydrothermal reactor, the right tee joint on the second hydrothermal reactor is connected with the left tee joint on the third hydrothermal reactor, and so on, and the operation is repeated until all the reactors are connected; the right tee joint on the last hydrothermal reactor is connected with the inlet of the circulating pump; each hydrothermal reactor is provided with a heating device; the device is characterized in that two filters for solid-liquid separation are mounted in each hydrothermal reactor, one of the filters is connected with the left valve through a pipeline, and the other filter is connected with the right valve through a pipeline.

Description

technical field [0001] The invention relates to a hydrothermal reaction device, in particular to a device for preparing biochar by a hydrothermal method. Background technique [0002] Patent CN 106830603B discloses a cascade heat exchange method, but its device is an indirect heat exchange device. The advantage of indirect heat exchange is that the components in each reactor are not affected by the outside world, but the disadvantage is that factors such as temperature difference, heat exchange area, and heat exchange time need to be considered, and there are many constraints in actual engineering. [0003] For some products that are easy to separate from solids and liquids and whose reaction products are not sensitive to changes in the components in the reactor (such as hydrothermal biochar from garden waste), direct heat exchange is easier to achieve. This patent improves the patent CN 106830603B, and intends to realize heat recovery by means of direct heat exchange. Co...

AI Technical Summary

Problems solved by technology

The advantage of indirect heat exchange is that the components in each reactor are not affected by the outside world, but the disadvantage is that factors such as temperature difference, heat exchange area, and heat exchange time need to be considered, and there are many constraints in actual engineering.

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