A pulverized coal pyrolysis method and device

A pulverized coal and pyrolysis technology, which is applied in special forms of dry distillation, petroleum industry, coke ovens, etc., can solve the problems of difficult gas discharge, low gas thermal efficiency, large gas circulation volume, etc. The effect of low power consumption

Inactive Publication Date: 2017-06-13
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the solid heat carrier has problems such as large dust in the gas and large ash content in semi-coke; the rapid pyrolysis of gas has problems such as large gas circulation, low thermal efficiency of heating and cooling cycle gas, and large dust in the gas. Although coal has problems such as low heat transfer efficiency and small output, the vertical furnace has the advantages of low comprehensive energy consumption, small investment, and simple operation. big, wait

Method used

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  • A pulverized coal pyrolysis method and device
  • A pulverized coal pyrolysis method and device
  • A pulverized coal pyrolysis method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The pyrolysis method and device of this embodiment are as follows:

[0036] Use an external heat source to heat the static furnace 3 to generate high-temperature flue gas, which is used to preheat the static furnace 1. At this time, the flue gas three-way valve y-3 is closed in the direction of the flue gas pipeline, that is, closed up, leading to the direction of the three-way valve s-1 Open, the hot flue gas enters the static furnace 1, and at the same time the air inlet of the three-way valve s-1 of the static furnace 1 is closed, the flue gas in the static furnace 1 is discharged into the flue gas pipe through the three-way valve y-1, that is, it is opened upwards, y-1 is connected to s-2 to close, that is, down to close. At this time, the pulverized coal in the static furnace 1 is dried and preheated, and the steam generated by drying enters the flue gas pipeline and is purified to meet the standard and then discharged; the coal inlet valve M-1 and the outlet The c...

Embodiment 2

[0048] Different from Embodiment 1, the air guiding device of this embodiment includes a plurality of air guiding units, such as image 3 As shown, each air guide unit includes an upper vent 25, a lower vent 27 and a vent pipe 26, wherein the upper and lower vents are box-type structures, and the vent pipe 26 is in the shape of a truncated cone. Suspension rods 28 are also used to connect the connected air guide units.

[0049] The size of the upper air vent in this embodiment is 60×1400mm; the height of the air pipe is 100mm; the size of the lower air vent is 120×1500mm.

Embodiment 3

[0051] Each working unit (total three work) of this embodiment is provided with the work process of three independent furnaces, as Figure 4 As shown, at a certain moment:

[0052] 7#, 8#, 9# three independent furnaces are in cooling state;

[0053] Furnaces 6#, 5#, and 4# are in the state of pyrolysis, and the preheated air is used for combustion and pyrolysis in the 6# furnace. Furnaces 5# and 4# are also in the state of pyrolysis at the same time. The gas produced in the pyrolysis furnace enters the gas pipe and is Purify and cool to get cold gas and tar;

[0054] The 3#, 2#, and 1# furnaces whose temperature in the furnace is lower than the pyrolysis temperature are in a preheating state by using the hot flue gas discharged from the 4# furnace, and the steam generated in the three preheating furnaces is discharged into the flue gas pipe, and the 1# furnace The preheated flue gas that comes out is also discharged into the flue gas pipe at the same time.

[0055] At the n...

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Abstract

The invention relates to a powder coal static pyrolysis method. The pulverized coal dry distillation method involved includes: at least three working units are provided, and the three working units are respectively provided with a pulverized coal inlet and a semi-coke outlet; Preheating, carbonization and pyrolysis, cooling, and discharge from the semi-coke outlet; at the same time, the three working units are respectively in the preheating working state, carbonizing and pyrolysis working state, and cooling working state, correspondingly, the preheating work unit, a dry distillation pyrolysis working unit and a cooling working unit, wherein: the hot flue gas generated by the dry distillation pyrolysis working unit is used as a heat source for the preheating working unit. The pulverized coal carbonization and pyrolysis device involved includes: three pulverized coal pyrolysis furnaces, and the three furnaces work in a cycle to realize the pulverized coal static carbonization and pyrolysis. The process is simple, the equipment is simple, the investment is small, and the thermal efficiency is high. , the gas quality is good, the semi-coke ash content is low, and the tar yield is high.

Description

technical field [0001] The invention relates to coal pyrolysis technology, in particular to a powdered coal static pyrolysis method. Background technique [0002] There are many technologies for pulverized coal pyrolysis at home and abroad, but mainly include external heat pyrolysis, solid heat carrier pyrolysis, rapid gas pyrolysis, etc. Among them, the solid heat carrier has problems such as large dust in the gas and large ash content in semi-coke; the rapid pyrolysis of gas has problems such as large gas circulation, low thermal efficiency of heating and cooling cycle gas, and large dust in the gas. Although coal has problems such as low heat transfer efficiency and small output, the vertical furnace has the advantages of low comprehensive energy consumption, small investment, and simple operation. Great, wait for the question. Contents of the invention [0003] In view of the defects or deficiencies in the prior art, one of the purposes of the present invention is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B57/10
CPCY02P20/129
Inventor 赵鹏
Owner CHANGAN UNIV
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