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Device and method thereof for drying wet-based coal at low temperature with low oxygen

A wet-based, coal-based technology, applied in the coal field, can solve problems such as low safety, unfavorable drying, flammability and explosion, and achieve the effects of reducing pollution, saving energy consumption, and operating safely

Inactive Publication Date: 2014-10-29
JIANGSU PENGFEI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional coal direct drying method is to use high-temperature flue gas at 500°C to 700°C to dry coal slime or cleaned coal. The untreated hot flue gas directly contacts with coal, which is flammable and explosive, and the safety is not high; Or fill the flue gas of drying coal with inert gas, which is too expensive and not conducive to large-scale drying

Method used

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  • Device and method thereof for drying wet-based coal at low temperature with low oxygen
  • Device and method thereof for drying wet-based coal at low temperature with low oxygen
  • Device and method thereof for drying wet-based coal at low temperature with low oxygen

Examples

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Embodiment 1

[0027] A device for drying wet-based coal at low temperature and low oxygen according to the embodiment of the present invention, such as figure 1 and figure 2 As shown, it includes a coal-fired furnace 1, a dryer 11, a blanking and gas outlet device 4 connected in sequence through pipes, a feeding device is connected to the body of the dryer 11, and a flue gas purification device and a flue gas are also included. Monitoring device, the dryer 11, the blanking and gas outlet device 4 are located between the flue gas purification devices, and the three together form a circulation loop; the flue gas monitoring device is located between the coal-fired furnace 1 and the flue gas purification device.

[0028] Further, a combustion-supporting fan is also connected to the inner cavity wall of the coal-fired furnace 1 .

[0029] Further, the flue gas monitoring device is a filter chamber 2 that can be used to remove open flames and fly ash at the same time, and the filter chamber 2 c...

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Abstract

The invention relates to the field of coal, and in particular relates to a device and a method thereof for drying wet-based coal at low temperature with low oxygen. The device comprises a coal combustor, a drying machine and a discharge and gas outlet device which are connected in sequence through pipelines, wherein a supply device is connected with the drying machine. The device further comprises a fume purification device and a fume monitoring device, wherein the drying machine and the discharge and gas outlet device are positioned between the fume purification devices and therefore a circulation loop is formed among the three components; the fume monitoring device is positioned between the coal combustor and the fume purification device. The device has the beneficial effects that a part of the waste gas at the tail part of the drying machine is recycled and utilized, so that the energy consumption is reduced, the waste gas exhaust mount is reduced, and the pollution is reduced.

Description

technical field [0001] The invention relates to the field of coal, in particular to a device and method for drying wet-base coal at low temperature and low oxygen. Background technique [0002] my country is a large coal consumption country. Although coal reserves are abundant, some coals have low coalification degree, high moisture content, high volatile content and low calorific value, which seriously affects the effective utilization of coal resources. Moisture is one of the remarkable characteristics of this type of coal, and it is also one of the most important parameters affecting its use. The moisture content is generally between 15% and 35%. [0003] Because wet-based coal has the characteristics of high water content and high volatile content, it has a low flash point and is easy to spontaneously combust, which is not conducive to transportation and difficult to store. The conditions for coal drying are also harsh. Temperature, open flame, and oxygen content of flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/08
Inventor 王曈曈蔡庆兰周益鹏谢伟
Owner JIANGSU PENGFEI GROUP
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