Cascade heat exchange thermal hydrolysis reaction device for material mixing and operation method

Abstract

The invention discloses a cascade heat exchange thermal hydrolysis reaction device for material mixing and an operation method. The cascade heat exchange thermal hydrolysis reaction device is formed by connecting more than three thermal hydrolysis reactors and circulating pumps according to a figure; the device is characterized in that the device is provided with a liquid outlet pump; a filter is arranged inside each reactor, and a liquid inlet valve and a liquid outlet valve are arranged outside each reactor and are connected according to a figure; and the operation mode of the reaction device is as follows: materials are added into all reactors, and one reactor is kept in a non-full state. One reactor is heated until the reaction is completed, and solid-liquid separation is performed on the materials in the reactor. The liquid phase is pumped into a reactor with an underfilled space, and heat contained in the liquid is utilized to carry out direct mixed heat exchange with other reactors one by one, so that the heat and the temperature are recovered in a graded manner; and the solid phase, the discharging and the post-feeding are performed, and the space is kept in a non-full state. And then, the steps of heating one reactor are repeated until the reaction is completed and the subsequent steps to form continuous operation.

Description

technical field [0001] The invention relates to thermal hydrolysis reaction equipment, in particular to a sludge thermal hydrolysis reaction device. Background technique [0002] Patent CN 106830603B discloses a cascade heat exchange method. Considering that sludge is a material that is difficult to filter, an indirect heat exchange device is designed. However, indirect heat transfer is restricted by factors such as temperature difference, heat transfer area, and heat transfer time. In actual engineering, the device will become extremely complicated and the difficulty of implementation will be increased. [0003] After reviewing the data, it was found that although the original sludge is a material that is difficult to filter, after the thermal hydrolysis reaction, the degree of inorganicization of the sludge has increased and it has become a material that is easy to filter; at the same time, the sludge is heated Hydrolysis, the mixing of materials with different degrees of...

AI Technical Summary

Problems solved by technology

However, indirect heat transfer is restricted by factors such as temperature difference, heat transfer area, and heat transfer time. In actual engineering, the device will become extremely complicated and the difficulty of implementation will be increased.

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