Coal digestion tubular reaction device

Abstract

The invention discloses a coal digestion tubular reaction device. The device comprises a plurality of groups of pipeline units which are coaxially communicated in sequence. The whole coal digestion tubular reaction device spirally rises in the vertical direction and is arranged in a surrounding horizontal mode in the overlooking direction. Each pipeline unit comprises a reaction main pipe used formaterial reaction and a jacketed pipe arranged outside the reaction main pipe in a sleeving mode. The reaction main pipes of the adjacent pipeline units are connected; the feeding hole is formed in the reaction main pipe of the lowermost pipeline unit; the discharge hole is formed in the reaction main pipe of the uppermost pipeline unit, wherein reaction materials flow from bottom to top; a cavity is formed between the reaction main pipe and the jacketed pipe and each jacketed pipe is provided with a fluid inlet and a fluid outlet, wherein a heat exchange medium flows in the cavity. The flowing direction of the heat exchange medium is opposite to that of the reaction material. The coal digestion tubular reaction device can continuously and stably operate, and meets the requirements of ultra-pure coal technology amplification and industrial test.

Description

technical field [0001] The invention relates to the technical field of coal cleaning, in particular to a coal digestion tubular reaction device. Background technique [0002] Coal is the main energy source in our country. The traditional coal-burning technology has caused serious pollution to the environment and is the main source of air pollution in our country. Paying attention to the production of clean coal and vigorously developing clean, efficient and low-pollution clean coal technology is the only way to achieve high economic development and maintain a good ecological environment. [0003] Ultra-pure coal technology is one of the clean coal utilization technologies widely studied by domestic and foreign scholars. Ultra-pure coal refers to ultra-low ash coal whose ash content is less than 1% after deep deashing of coal by physical or chemical methods. Ultra-pure coal can be used to prepare ultra-pure fuel liquid instead of diesel for gas turbines and low-speed diesel...

AI Technical Summary

Problems solved by technology

During operation, it was found that the flow of coal slurry in the coal digester was uneven, the concentration of coal slurry in the vertical pipe section was small, and the concentration of coal slurry in the horizontal pipe section was high and easy to deposit; the vertical pipe was equipped with insulation measures, and the horizontal pipe section was as short as possible due to the design length Without corresponding insulation measures, when the coal slurry flows from the vertical pipeline to the horizontal pipeline, the temperature difference between the coal slurry and the pipe wall will cause the temperature of the coal slurry to drop, the apparent viscosity to increase, and the fluidity to decrease, resulting in an increase in the load of the coal slurry pump. The horizontal pipelines are clogged, so frequent parking has to be done, the connections between the pipelines are removed, and the pipelines are flushed; the heat conduction oil is heated by electricity, and the maintenance and maintenance of the heat conduction oil heating system is expensive and the workload is heavy, and the oil temperature controller is prone to failure, and Heat transfer oil is expensive, has a short service life, and has high requirements on temperature and pressure. It is necessary to design a heat exchange system to replace the heat transfer oil heating system; the whole device has no automatic control system, and manual control and intermittent operation are used, which is not conducive to the needs of future industrial expansion.

The existing devices cannot meet the continuous and stable operation requirements required for the research and development of ultra-pure coal technology. Therefore, it is necessary to provide a coal digestion tubular reaction device that can operate continuously and stably

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