Oxygen-free drying and upgrading system of lignite and lignite drying process

A lignite drying technology, applied in the direction of drying solid materials, heating to dry solid materials, drying, etc., to achieve the effect of reducing emissions and reducing energy consumption

Inactive Publication Date: 2010-05-12
郑州拉姆顿清洁能源工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Specifically, it provides a lignite anaerobic...

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  • Oxygen-free drying and upgrading system of lignite and lignite drying process
  • Oxygen-free drying and upgrading system of lignite and lignite drying process

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Embodiment 1

[0041] Embodiment one: see figure 1 , figure 2, diagram 2-1 , Figure 2-2 , a lignite anaerobic drying and upgrading system, including the coal anaerobic drying device described in Embodiment 1, and also includes a heating system, the heating flue gas output pipe of the heating system communicates with the inlet pipe 16 of the coal anaerobic drying device, during drying The flue gas inlet pipe and the flue gas outlet pipe of the device are respectively equipped with thermometers T 1 , T 2 , there is a discharge valve and a thermometer T at the discharge port at the bottom of the drying device 0 A steam pipe 9 is also provided inside the drying cylinder of the coal anaerobic drying device, and the steam pipe is drawn out of the drying device, and the steam pipe is drawn out of the drying device and directly discharged.

[0042] At the same time, a fork pipe (return pipe) 18 is provided on the air outlet pipe 17 of the coal anaerobic drying device, and the fork pipe 18 an...

Embodiment 2

[0054] Embodiment 2: The meaning is basically the same as that of Embodiment 1, and the similarities will not be repeated. The difference is: control the flue gas input temperature T 1 400~800℃, flue gas output temperature T 2 100-250°C.

Embodiment 3

[0055] Embodiment three: the meaning is basically the same as that of embodiment one, and the similarities will not be repeated. The difference is: for the lignite drying and upgrading, the lignite discharge rate is controlled, and the lignite final heating temperature T is maintained. 0 It is between 200 and 350°C.

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Abstract

The invention relates to an oxygen-free drying and upgrading system of lignite and a lignite drying process. The drying and upgrading system comprises a drying device and a heating system, wherein the drying device comprises a vertical drying cylinder as well as a lignite inlet, a lignite outlet, a gas inlet pipe and a gas outlet pipe which are arranged at the upper and the lower ends of the vertical drying cylinder. The outer sides of two side walls of the drying cylinder are respectively provided with hot gas cavities, and a certain amount of discharge pipes or discharge plates are communicated between the two hot gas cavities so that the lignite in the drying cylinder is completely isolated from hot gas in the hot gas cavities and the discharge pipe or the discharge plate. A thermometer T1 and a thermometer T2 are respectively installed at the nozzle of the gas inlet pipe and the nozzle of the gas outlet pipe, and a thermometer T0 is arranged at a discharge hole. The drying cylinder is also internally provided with a steam pipe which is led out of the drying device. Drying is carried out at normal pressure, and the flue gas input temperature T1, the flue gas output temperature T2 and the final heating temperature T0 of the lignite are controlled, thereby part of combined water in the lignite can be removed, the lignite is transformed from soft coal to hard coal and from hydrophily to hydrophobicity, the lignite can be transported, stored and used as soft coal, and the lignite drying process is very beneficial to popularization and implementation.

Description

1. Technical field: [0001] The invention relates to a lignite drying and upgrading modification technology, in particular to a lignite anaerobic drying and upgrading system and a lignite drying process. 2. Background technology: [0002] According to statistics, the world's lignite reserves are about 2622.9 billion tons, accounting for about 24.4% of the world's total coal reserves. China has discovered lignite resources of 129.132 billion tons, accounting for about 12.7% of China's coal reserves. Because lignite is formed very shallow from the surface, it is suitable for open-pit mining, so it is cheap. But lignite also has the following outstanding problems: [0003] 1. High moisture and low calorific value. Lignite generally has a moisture content between 30% and 65%, and its general calorific value is about 3000kcal / kg. [0004] 2. Low density, easy weathering, spontaneous combustion when exposed to water, and the sales radius does not exceed 500 kilometers. [0005]...

Claims

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Application Information

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IPC IPC(8): F26B17/12F26B3/18F26B23/10F26B25/22C10L5/00
Inventor 黄龙李英群查理德·迪玻特克里斯托夫·摩豪斯
Owner 郑州拉姆顿清洁能源工程技术有限公司
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