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Segmented upgrading and hot flue gas gradient utilization system for low-rank coal and utilization method thereof

A hot flue gas and low-rank coal technology, applied in the field of low-rank coal staged quality improvement and hot flue gas cascade utilization system, can solve the problems of exacerbated environmental problems, non-compliance with high quality and high use, and meet environmental protection requirements, It is beneficial to the effective use of heat and the effect of production control

Pending Publication Date: 2020-05-08
白太宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, my country's coal utilization is relatively simple, mostly used for combustion and power generation, and the oil and gas resources in coal are burned in a simple form, which does not conform to the principle of "high quality for high use, low quality for low use". exacerbated environmental problems

Method used

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  • Segmented upgrading and hot flue gas gradient utilization system for low-rank coal and utilization method thereof
  • Segmented upgrading and hot flue gas gradient utilization system for low-rank coal and utilization method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Such as figure 1 As shown, a low-rank coal sub-level upgrading and hot flue gas cascade utilization system includes a rotary kiln 1 and a hot blast stove 2. The outlet of the rotary kiln 1 is connected to a vertical furnace 3, which is mainly composed of pyrolysis The upgrading section 4 and the cooling section 5 are composed, the pyrolysis upgrading section 4 is arranged on the upper part of the vertical furnace 3, the cooling section 5 is arranged on the lower part of the vertical furnace 3, and the cooling section 5 is mainly composed of a plurality of coolers, the pyrolysis upgrading section The quality section 4 includes a plurality of heat exchange tubes installed in the vertical furnace, the hot blast outlet of the hot blast stove 2 is connected to the heat exchange medium inlet of the pyrolysis upgrading section 4, and the heat exchange medium outlet of the pyrolysis upgrading section 4 is connected to the rotary The inlet of the inlet hood of the kiln 1 is conn...

Embodiment 2

[0022] The hot blast outlet of the hot blast stove 2 is connected with a hot blast regulating pipeline 11, and the hot blast regulating pipeline 11 is provided with a first control valve 12, and the temperature control of the hot flue gas is realized by controlling the steam level and the amount of steam produced by the boiler. A second temperature sensor 13 is installed on the pipeline between the hot air outlet and the heat exchange medium inlet of the pyrolysis upgrading section 4 , and the second temperature sensor 13 is interlocked with the first control valve 12 for control. All the other are the same as the first embodiment.

[0023] In this embodiment, the hot air regulating pipeline 11 is controlled to control the temperature of the hot air entering the pyrolysis upgrading section 4, and the second temperature sensor 13 directly detects the outlet temperature of the hot air stove, and then adjusts the opening degree of the first control valve 12 according to the temper...

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Abstract

The invention relates to a segmented upgrading and hot flue gas gradient utilization system for low-rank coal and a utilization method thereof, and belongs to the technical field of low-order pulverized coal pyrolysis. The outlet of a discharging cover of a rotary kiln is connected with a coal falling channel; an upgrading pyrolysis section is arranged at the upper part of the coal falling channel; a multi-stage cooler is arranged at the lower part of the coal falling channel; the upgrading pyrolysis section comprises a plurality of heat exchange tubes mounted in the coal falling channel; thehot air outlet of the hot air furnace is connected with the heat exchange medium inlet of the upgrading pyrolysis section; the heat exchange medium outlet of the upgrading pyrolysis section is connected with the inlet of the gas inlet cover of the rotary kiln; the outlet of the gas outlet cover of the rotary kiln is connected with a desulfurization and denitrification system through a fan; a firsttemperature sensor, a flow meter and a butterfly valve are further mounted on a pipeline between the outlet of the air outlet cover of the rotary kiln and the fan; and the first temperature sensor and the fan are in linkage control, the upgraded coal subjected to secondary pyrolysis in the upgrading pyrolysis section enters the cooling section to exchange heat with desalted water, and therefore,the structural design is reasonable, flue gas heat can be fully utilized, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a low-rank coal staged quality improvement and hot flue gas cascade utilization system and utilization method thereof, belonging to the technical field of low-rank pulverized coal pyrolysis. Background technique [0002] Coal is the main energy source in my country for a period of time. In 2006, China's coal reserves amounted to 1.0345 billion tons, and the remaining proven recoverable reserves accounted for about 13% of the world's total, ranking third in the world, of which low-rank coal reserves accounted for about 57%. In recent years, my country has developed more than 3 billion tons of coal every year, more than half of which are low-rank coals. At the same time, my country's coal utilization is relatively simple, mostly used for combustion and power generation, and the oil and gas resources in coal are burned in a simple form, which does not conform to the principle of "high quality for high use, low quality for low use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B57/10C10B57/02C10B39/00F27D17/00
CPCC10B53/00C10B57/10C10B57/02C10B39/00F27D17/004Y02P10/25
Inventor 张丰阁施俊鹏刘佳
Owner 白太宽
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