Sludge pyrohydrolysis system

Abstract

The invention discloses a sludge pyrohydrolysis system comprising a sludge storage tank, a sludge preheating device, a sludge conveying pump and a steam source, a pyrolysis sludge storage tank, a sludge pyrohydrolysis pipeline and a steam sludge ejector; a to-be-treated sludge outlet in the sludge storage tank communicates with a feeding port of the sludge preheating device; a discharge port of the sludge preheating device communicates with a sludge inlet of the sludge conveying pump; a sludge outlet of the sludge conveying pump communicates with a first inlet of the steam sludge ejector; a steam supply port of the steam source communicates with a second inlet of the steam sludge ejector; an outlet of the steam sludge ejector communicates with an inlet of the sludge pyrohydrolysis pipeline, a pressure relief discharger at a pyrohydrolysis sludge outlet of the sludge pyrohydrolysis pipeline communicates with a coil pipe inlet of a heat recovery coil pipe, and a coil pipe outlet of the heat recovery coil pipe communicates with an inlet of the pyrolysis sludge storage tank through a discharge pipeline E via the pressure relief discharger and the heat exchanger in sequence. The sludgepyrohydrolysis system is simple in structure, relatively low in cost, high in pyrohydrolysis efficiency, energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a sludge thermal hydrolysis system. Background technique [0002] In recent years, with the rapid development of industrialization and urbanization, the amount of urban sewage has also increased, which poses a hazard to our ecological environment and health. [0003] Harmless treatment of sludge has become a top priority for urban development. However, the sludge has complex components, low calorific value, and high moisture content. Only after pretreatment can the organic matter content in the sludge be increased, the fluidity and dehydration performance of the sludge can be improved, and the subsequent anaerobic digestion efficiency can be effectively promoted. [0004] At present, the thermal hydrolysis treatment of sludge is recognized as a simple and efficient sludge pretreatment method. Sludge thermal hydrolysis is to heat the sludge in a closed container under certain temperature and pressure conditions, so that the sl...

AI Technical Summary

Problems solved by technology

This kind of sludge hydrothermal drying treatment device has complex equipment structure, high cost, and cumbersome process, especially in the hydrothermal reactor, only under the action of the agitator, the sufficient mixing of steam and sludge cannot be quickly realized. , so the heating is not uniform, and the heat transfer efficiency is not high. At the same time, the hydrothermal reactor needs to be pressurized to a certain pressure by passing steam to carry out thermal hydrolysis. The sludge stays in the reaction tank for a long time, and the energy consumption is high.

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