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A raw coal low-temperature drying and coal transportation integrated equipment

A technology of drying equipment and coal transportation, which is applied in the direction of drying gas arrangement, combustion equipment, progressive dryer, etc., and can solve problems such as limiting the exhaust gas temperature of boilers, affecting the power consumption of coal mills, and reducing the utilization efficiency of coal combustion, so as to reduce the The moisture content outside the raw coal, the effect of improving the utilization efficiency of coal combustion and improving the efficiency of power generation

Active Publication Date: 2017-04-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of moisture in coal will reduce its low calorific value, and also limit the exhaust gas temperature of the boiler, thus reducing the utilization efficiency of coal
In addition, the moisture in the coal will directly affect the power consumption of the coal mill

Method used

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  • A raw coal low-temperature drying and coal transportation integrated equipment
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  • A raw coal low-temperature drying and coal transportation integrated equipment

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Embodiment Construction

[0021] The present invention provides an integrated equipment for raw coal low-temperature drying and coal conveying. The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] exist figure 1 , figure 2 , Figure 5 In the schematic diagram of the raw coal low-temperature drying and coal transportation integrated equipment shown, in the coal delivery room 1, the equipment shell 2 and the equipment inner shell 10 form a double-layer closed space, and the air introduction pipe 3 is connected with the drying equipment inner shell 2. The first water medium heater 11 is arranged; the first and second water medium heaters are arranged in rows of serpentine tubes (such as image 3 As shown), the temperature range of the working fluid in the multi-row serpentine tubes is 50-60°C, and the air is heated to 45-55°C to directly heat the coal particles on the crawler belt 6. ; The inside of the crawler belt 6 is sequentially a...

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Abstract

The invention discloses low-temperature drying and coal conveying integrated equipment for raw coal and belongs to the field of raw coal drying equipment. In a coal conveying room, a double-layer closed space is formed by an equipment outer shell and an equipment inner shell, air introduction pipelines are connected with the drying equipment inner shell, first water medium heaters are arranged at junctions of the air introduction pipelines and the drying equipment inner shell, a supporting structure, a second water medium heater and a rotating shaft are sequentially arranged inside a crawler from top to bottom, and thus, the low-temperature drying and coal conveying integrated equipment for the raw coal is formed; an outlet of the low-temperature drying and coal conveying integrated equipment is connected with a coal bunker, and external moisture drying for lignite, sub-bituminous coal and bituminous coal is completed while coal granules are conveyed; air drying tail gas is conveyed to chimneys with baffles through an air pipeline and then is exhausted into the atmosphere. According to the low-temperature drying and coal conveying integrated equipment for the raw coal, disclosed by the invention, the external moisture drying for the raw coal (lignite, sub-bituminous coal and bituminous coal) can be completed by using low-temperature drying heat sources of different types while the coal granules are conveyed, so that the efficiency of an electric power plant is increased.

Description

technical field [0001] The invention belongs to the field of raw coal drying equipment, in particular to a raw coal low-temperature drying and coal conveying integrated equipment. Background technique [0002] The characteristics of my country's fossil fuel reserves are "rich in coal, poor in oil, and low in gas". This feature determines that China's primary energy production and consumption structure will not change for a long time. As of the end of 2013, the installed capacity of coal-fired power generation has reached 817 million kilowatts, and the annual power generation has reached 3.94 trillion kilowatt-hours, and in recent years it has maintained an annual growth rate of 30-40 million kilowatts. On the other hand, the emissions of major pollutants such as dust, SO2, and NOx from coal-fired power plants accounted for 12.20%, 42.16%, and 41.59% of the country's total emissions, respectively. Therefore, further improving the operating efficiency of coal-fired power plant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23K1/04F23K3/00F26B15/18F26B21/00
Inventor 徐钢许诚杨勇平赵世飞刘文毅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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