Pulverized coal pyrolysis system capable of removing ash through rapping

Abstract

The invention discloses a pulverized coal pyrolysis system capable of removing ash through rapping. The pulverized coal pyrolysis system comprises a pulverized coal pyrolysis unit, a cyclone separator, a coke powder pressurized conveying unit, a coke powder slurrying unit and a coal gas cleaning unit, a pyrolysis product outlet of the pulverized coal pyrolysis unit is communicated with a top inlet of the cyclone separator through a pipeline, and a coal gas outlet in the top of the cyclone separator is communicated with an inlet of the coal gas cleaning unit through a pipeline; a coke powder outlet at the bottom of the cyclone separator, the coke powder pressurizing and conveying unit and the coke powder slurrying unit are connected; the pulverized coal pyrolysis system is further provided with a rapping ash removal device and a PLC (Programmable Logic Controller); the output end of the rapping ash removal device is in contact with the outer wall of the cyclone separator; and the rapping dust removal device is electrically connected with the PLC. The method has the beneficial effects that the coke slurry can be produced through pulverized coal pyrolysis in a green and efficient manner, waste water generated in the coal gas cleaning process is effectively utilized, and meanwhile cooling separation of pyrolysis products, preparation of the coke slurry and environment-friendly utilization of the waste water are achieved.

Description

technical field [0001] The invention relates to the technical field of energy, in particular to a pulverized coal pyrolysis system capable of vibrating and removing ash. Background technique [0002] Coal pyrolysis technology in medium and low temperature environment is a new type of coal resource utilization technology, which has been deeply studied in many universities in my country. With the continuous improvement of this technology, the low-temperature pyrolysis rate of coal has reached about 70%, and the contained energy accounts for about 80%. However, the utilization rate of this technology in my country's actual production is not high, and a perfect pyrolysis coke powder standard has not been formulated; and how to effectively utilize the coal pyrolysis product coke powder is the focus of the current low-temperature coal pyrolysis technology. [0003] The existing pulverized coal pyrolysis system usually uses a cyclone to separate the pyrolysis products. During the ...

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Problems solved by technology

However, the utilization rate of this technology in actual production in my country is not high, and no perfect pyrolysis coke powder standard has been formulated; how to effectively utilize coal pyrolysis product coke powder is the focus of low-temperature pyrolysis technology for coal now

[0003] The existing pulverized coal pyrolysis system usually uses a cyclone separator to separate the pyrolysis products. During the separation process, the wall area of ​​the cyclone separator is ash, which affects heat transfer (the heat transfer of the metal wall is better than that of the ash layer), which will cause The temperature in the cyclone separator rises, which further causes the high-temperature and explosive gas (pyrolysis product) in the cyclone separator to cause an explosion, which poses a high safety risk; in addition, the industrial wastewater generated during the pyrolysis of pulverized coal pollutes the environment

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