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Pulverized coal pyrolysis method and device

A pulverized coal and pyrolysis technology, applied in special forms of dry distillation, petroleum industry, coke ovens, etc., can solve the problems of large gas circulation, difficult gas discharge, low gas thermal efficiency, etc., to achieve low power consumption, saving manpower, heat Use the effect of high efficiency

Inactive Publication Date: 2015-07-15
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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  • Pulverized coal pyrolysis method and device
  • Pulverized coal pyrolysis method and device
  • 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] The static furnace 3 is heated by an external heat source 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 flue gas pipe direction, that is, closed up, leading to the three-way valve s-1 direction 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, the top opens, y-1 is connected to the s-2 direction to be closed, that is, the bottom is closed. At this time, the pulverized coal in the static furnace 1 is dried and preheated, and the steam generated by the drying enters the flue gas pipeline and is discharged after purification; the coal inlet valve M-1 and outlet The coke valve J-1 is close...

Embodiment 2

[0048] The difference from Embodiment 1 is that the air guiding device of this embodiment includes multiple 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 tube 26, wherein the upper and lower vents are all box-shaped, and the vent tube 26 has a frustum shape. Similarly, a suspension rod 28 is used to connect the air guide units.

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

Embodiment 3

[0051] There are three independent furnace working processes in each work unit (three work in total) of this embodiment, such as Figure 4 As shown, at a certain moment:

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

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

[0054] Furnace 3#, 2#, 1# where the temperature in the furnace is lower than the pyrolysis temperature uses the hot flue gas discharged from the 4# furnace to be in a preheating state, and the steam generated in the three preheating furnaces is discharged into the flue gas pipeline, 1# furnace The preheated flue gas coming out is also discharged into the flue gas duct at the same time.

[0055] At the next moment, the working status of each furnace body and the switching ...

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Abstract

The invention relates to a static pulverized coal pyrolysis method. A related pulverized coal dry distillation method needs at least three working units, each of the three working units is provided with a pulverized coal inlet and a semi-coke outlet; after being fed into a pulverized coal pyrolysis unit, the same batch of pulverized coal raw material is sequentially subjected to preheating, dry distillation pyrolysis and cooling and finally discharged from the semi-coke outlet; at the same moment, the three working units are respectively at a preheating working state, a dry distillation pyrolysis working state and a cooling working state, and correspondingly the three working units are respectively a preheating working unit, a dry distillation pyrolysis working unit and a cooling working unit, wherein hot flue gas generated by the dry distillation pyrolysis working unit is used as a heat source of the preheating working unit. A related pulverized coal dry distillation pyrolysis device comprises three pulverized coal pyrolysis furnaces, and the three furnaces work in a circular way to realize the static dry distillation pyrolysis of pulverized coal. The process is simple and rapid, requires simple equipment and small investment, is high in thermal efficiency, and can ensure high coal gas quality, low ash content of semi-coke and high tar yield.

Description

Technical field [0001] The invention relates to coal pyrolysis technology, in particular to a static pyrolysis method of pulverized coal. Background technique [0002] There are many technologies for pyrolysis of pulverized coal at home and abroad, but they mainly include external thermal pyrolysis, solid heat carrier pyrolysis, and fast gas pyrolysis. Among them, the solid heat carrier has problems such as large dust in the coal gas, large semi-coke ash content, etc.; rapid gas pyrolysis has problems such as large gas circulation, low thermal efficiency of heating and cooling circulating gas, and large dust in coal gas. The external heating type vertical furnace pyrolysis powder Although coal has problems such as low heat transfer efficiency and small output, vertical furnaces have the advantages of low comprehensive energy consumption, low investment, and simple operation. The outstanding problem is that gas is not easy to be discharged from the material, wet coke quenching pol...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B57/10
CPCY02P20/129
Inventor 赵鹏
Owner CHANGAN UNIV
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