System and method for feeding and discharging materials for coal pyrolysis

Abstract

The invention, aiming at the defects of the prior art, provides a system and a method for feeding and discharging materials for coal pyrolysis. The system comprises a feeding device, a storage bin, a middle storage tank and a reactor, wherein the feeding device is positioned above the storage bin and is connected with a feed port of the storage bin; an inlet of the middle storage tank is connected with a discharge port at the lower part of the storage bin; a lower outlet of the middle storage tank is connected with a feed port at the upper part of the reactor; and the reactor is a closed reactor and is used for performing sweeping displacement by use of a gas. Therefore, the system can achieve material feeding and discharging without causing atmosphere fluctuation in the reactor, and has the advantages of being high in pyrolysis efficiency, feeding and discharging materials continuously, being high in automation degree and simple and convenient in operation, having stable heat source, pressure and atmosphere in the whole system, and being significant in energy-saving effect.

Description

technical field [0001] The invention relates to a material feeding and discharging system and method, in particular to a material feeding and discharging system and method of a coal pyrolysis reaction system. Background technique [0002] my country has huge reserves of medium and low-grade resources such as lignite, long-flame coal and non-caking coal, with proven reserves of more than 561 billion tons, of which the proven reserves of lignite resources are more than 130 billion tons. The conversion technology of using these abundant middle and low rank coals to produce alternative fuels has attracted much attention. Low-temperature dry distillation of coal, that is, a thermal processing process in which the temperature is raised to 500~600°C without air isolation (or in a non-oxidizing atmosphere), and then thermally decomposed into gas, coal tar and semi-coke. important technical approach. [0003] In recent years, with the shortage of energy and resources and the increa...

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Problems solved by technology

However, there are still the following disadvantages: (1) A large amount of externally loaded gas enters the reactor along with the solid powder, resulting in too much impurity gas content in the gas product produced by the reaction or a certain non-effective gas component, which affects the gas quality and causes the later gas product The process is complicated, and the construction cost and operation cost are expensive; (2) It is only suitable for feeding solid powder with small particle size, and cannot meet the continuous feeding requirements of solid particles with large particle size

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