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Inert drying and sorting device and method for lignite of power station boiler

A technology for power plant boilers and sorting devices, which is applied in the directions of dry gas arrangement, combustion method, dry solid materials, etc., can solve the problems of purification treatment, complex system, low safety, etc., and achieves prevention of spontaneous combustion and explosion, high quality, and improved utilization. rate effect

Pending Publication Date: 2019-03-12
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current huge limitation of non-evaporative dehydration technology is that a large amount of high-concentration organic wastewater will be generated in the production process, and it is difficult to purify it in an economical and effective way. Therefore, evaporative drying has become an effective treatment for lignite drying and dehydration. The way
Due to the advantages of wide adaptability, fast drying rate, and easy realization of continuous production, the evaporative drying dehydration process using hot air or steam as the drying medium is still the most widely used form of lignite drying, but this lignite drying method Common shortcomings such as complex system and low security

Method used

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  • Inert drying and sorting device and method for lignite of power station boiler
  • Inert drying and sorting device and method for lignite of power station boiler

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Effect test

Embodiment 1

[0032] A kind of lignite inert drying and sorting device used for power plant boilers of the present invention, such as figure 1 and figure 2 As shown, it includes inert drying and sorting integrated equipment 1, lignite burner 2, high-temperature furnace smoke pipe 3, low-temperature furnace smoke pipe 4, feeding device 5, drying device 6, rotating shell 61, rotating drive motor 62, Sorting device 7, fan coal mill 8 and collecting device 9;

[0033] The feeding device 5, the drying device 6, the sorting device 7, and the fan coal mill 8 are sequentially sealed and connected, and the collecting device 9 connected to the bottom of the sorting device 7 forms an inert drying and sorting integrated equipment 1;

[0034] The inlet of the feeding device 5 is a raw coal inlet, and the raw coal inlet is connected with the inlet flue of the air preheater 11 through the high-temperature furnace flue pipe 3; the feeding device 5 is connected with the drying device 6;

[0035] The dryi...

Embodiment 2

[0048] A method for inert drying and sorting of lignite used in power plant boilers of the present invention comprises the following steps:

[0049] a. Extract high-temperature and low-oxygen fume from the flue at the entrance of the air preheater 11, and send it to the raw coal entrance of the inert drying and sorting integrated equipment 1 through the high-temperature fume pipe 3, and send the lignite together with the high-temperature fume into the inert drying and sorting integrated equipment 1; the high-temperature furnace smoke provides a heat source for lignite drying, and makes the whole system in an inert flue gas atmosphere, the lignite loses moisture in the inert drying and sorting integrated equipment 1, while the lignite is drying In the device 6, it is thrown up with the rotation of the rotating shell and then falls to strengthen the heat exchange between lignite and high-temperature furnace smoke, and to break larger pieces of lignite;

[0050] b. The dried and ...

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Abstract

The invention relates to the technical field of lignite drying and upgrading, in particular to an inert drying and sorting device and method for lignite of a power station boiler. The inert drying andsorting device comprises inert drying and sorting integrated equipment. A raw coal inlet of the inert drying and sorting integrated equipment is connected with an air preheater inlet flue of the power station boiler through a high-temperature furnace smoke pipeline. A coarse lignite outlet and a fine lignite outlet are connected with an air preheater outlet flue through a low-temperature furnacesmoke pipeline. A pulverized coal outlet is connected with a lignite burner through a pipeline, wherein the lignite burner is arranged on a boiler hearth. The inert drying and sorting integrated equipment comprises a feeding device, a drying device, a sorting device, a fan coal mill and a collecting device, wherein the feeding device, the drying device, the sorting device and the fan coal mill aresequentially and hermetically connected, and the collecting device communicates with the bottom of the sorting device. An inclined rib plate is arranged on an inner wall of the drying device. The fine lignite outlet of the sorting device communicates with an inlet of the fan coal mill. The bottom coarse lignite outlet communicates with the collecting device. An inlet of the feeding device is connected with the air preheater inlet flue through the high-temperature furnace smoke pipeline. An outlet of the fan coal mill is a pulverized coal outlet and is connected with the lignite burner.

Description

technical field [0001] The invention relates to the technical field of lignite drying and upgrading, in particular to an inert lignite drying and sorting device and method for power plant boilers. Background technique [0002] The total global resources of lignite are about 4.35 trillion tons, accounting for 21% of the total reserves of global coal resources. As a low-rank coal, lignite belongs to the coal formed after the peatization stage, and has not undergone large-scale high-temperature and high-pressure coalification. Therefore, lignite still retains a large amount of water (the moisture content is about 30%-60%). Different upgrading and utilization technologies have different requirements on the moisture content of lignite. For the gasification process, the moisture content of the lignite is required to be 5%-15%, and the pulverized coal combustion furnace process requires the moisture content of the lignite to be controlled within the range of 12%-15%. [0003] Dryi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B11/04F26B21/14F26B25/00F23J15/06B02C21/00F23L15/02F23D1/00F23K3/00
CPCF23D1/00F23J15/06F23K3/00F23L15/02F26B11/04F26B21/14F26B25/00B02C21/00Y02E20/34
Inventor 周虹光严万军吴庆龙王岩陈煜敬小磊房凡严响林白鹏
Owner XIAN THERMAL POWER RES INST CO LTD