Fluidization moving series arrangement steam drying system and technology

Abstract

The invention discloses a fluidization moving series arrangement steam drying system and technology. The fluidization moving series arrangement steam drying system comprises an air exhausting opening arranged at the top, a feeding opening arranged in the middle, a fluidization bed drying device sequentially provided with an upper layer air distribution pipe and a lower layer air distribution pipe, a feeding device, a discharging device, a dust remover, a draft fan and an air blower. The fluidization bed drying device is arranged between the feeding opening and the discharging opening. The feeding device is communicated with the feeding opening of the fluidization bed drying device. The discharging device is connected with the discharging opening of the fluidization bed drying device in a bearing mode. The dust remover is provided with an air phase outlet, an air inlet and a solid phase outlet. The air inlet is communicated with the air exhausting opening of the fluidization bed drying device. The solid phase outlet is connected with the discharging device in an inclined mode. The draft fan and the air blower are sequentially connected in series. An inlet of the draft fan is connected with the air phase outlet of the dust remover and the air outlet of the draft fan is communicated with the upper layer air distribution pipe and the lower layer air distribution pipe. The invention further provides the fluidization moving series arrangement steam drying technology. The fluidization moving series arrangement steam drying system is good in safety performance and steam is easy to recycle in a drying process. The fluidization moving series arrangement steam drying technology is high in material drying efficiency.

Description

technical field [0001] The invention belongs to the field of energy technology, and in particular relates to a fluidized mobile serial steam drying system and process. Background technique [0002] High moisture content and the resulting low calorific value are the main obstacles to the utilization of high-moisture coal. [0003] Taking lignite as an example, lignite is mainly used for direct combustion to generate electricity. Lignite contains about 20% to 50% of water. If it is directly involved in combustion, on the one hand, it needs a lot of energy during the ignition process. In addition, lignite has high volatile components and is prone to explosion. Therefore, there is a certain difficulty in combustion control; in addition, because a large amount of heat energy will be taken away in the process of water evaporation, the heat loss of combustion exhaust is serious, and the thermal efficiency of the power plant is low, which undoubtedly increases the cost of power gene...

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Problems solved by technology

[0008] Although this patent improves the drying effect of lignite by setting multiple drying devices, the device is extremely complicated, the space area is large, the cost and maintenance cost of the device are high, and the recovery and utilization of water vapor in the lignite drying process is cumbersome.

[0009] To sum up, the current high-moisture coal drying devices generally have problems such as low heat exchange intensity, small processing capacity, and difficult recovery of water generated by drying. Therefore, high-moisture coal with high drying efficiency, good safety performance, and easy recovery of dry water Drying process and equipment have broad application prospects

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