Two-stage sludge hydrothermal reaction device

Abstract

The invention discloses a two-stage sludge hydrothermal reaction device. The device comprises: a plurality of slurrying reactors which are serially connected from front to back, a hydrothermal residence reactor and a plurality of flash evaporation reactors which are serially connected from front to back, and the hydrothermal residence reactor is arranged between the backmost slurrying reactor andthe headmost flash evaporation reactor, wherein at least one hydrothermal temperature reactor is also mounted between the hydrothermal residence reactor and the backmost slurrying reactor, every hydrothermal heating reactor is provided with a gas inlet tube, a gas outlet tube, a steam tube, a feed tube and a discharging tube which are connected with the corresponding hydrothermal heating reactor,a plurality of the hydrothermal heating reactors alternately run, and arrangement according to a preset timing sequence makes the discharging of the final-stage slurrying reactor and the feeding of the hydrothermal residence reactor continuously performed. The two-stage sludge hydrothermal reaction device disclosed in the invention simplifies the heating function of the hydrothermal reactor, and realizes good stirring performance, energy saving and high sludge treatment efficiency of the hydrothermal reactor.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a modification treatment technology for municipal or industrial sludge, and in particular to a two-stage sludge hydrothermal reaction device. Background technique [0002] In recent years, the urbanization process has become faster and faster, and the generation and treatment rate of urban domestic sewage are also increasing. Although various methods have been adopted to reduce the output of urban sludge, the total amount is still at an annual rate of 10%. rate increments. Sludge from sewage treatment plants is generally "anaerobic digestion-dosing dehydration" to reach a water content of about 80%, and then transported to sanitary landfills for landfill. 80% of the sludge still has a certain fluidity, which brings inconvenience to the landfill operation, and there is a hidden danger of secondary pollution. As the state strengthens the final disposal management of...

AI Technical Summary

Problems solved by technology

[0005] However, looking at the hydrothermal process systems adopted by various companies engaged in hydrothermal technology at home and abroad, whether it is a continuous process or a sequential batch process, the hydrothermal reactor integrates "heating", "stirring" and "reaction (retention)". In one, the hydrothermal reactor is used as the main reaction equipment. In order to ensure sufficient reaction temperature, pressure, time, and mixing degree, most of them are bulky, complex in structure, and expensive.

Images