Coal flash pyrolysis system and method

A fast, pyrolysis technology, applied in the chemical industry, can solve problems such as inability to run for a long time, complex process flow, high failure rate, etc., and achieve the effects of improving fast pyrolysis efficiency, simplifying process flow, and increasing tar yield

Active Publication Date: 2015-12-16
SHENWU TECH GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, the rapid pyrolysis reactors for medium and low-rank coal developed at home and abroad mainly include fluidized bed and down-going bed processes using gas or solid heat carriers. system, which makes the process very complicated, resulting in the high failure rate and low thermal efficiency of the medium and low-rank coal rapid pyrolysis system currently on the market, which cannot be operated for a long time, thus inhibiting the development of this technology

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  • Coal flash pyrolysis system and method
  • Coal flash pyrolysis system and method
  • Coal flash pyrolysis system and method

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Embodiment 1

[0162] This embodiment 1 adopts Figure 1-6 The rapid coal pyrolysis system of , wherein, 30 layers of regenerative radiant tubes 15 are distributed at intervals along the height direction of the reactor body 10 in the pyrolysis zone 13, and adjacent regenerative radiant tubes are arranged along the horizontal and reactor body heights The two directions are spaced at the same interval and distributed in parallel. The regenerative radiant tube adopts a circular tube with a diameter of 100mm. The distance between the outer walls of adjacent radiant tubes in the horizontal direction is 100mm, and the outer wall distance between adjacent radiant tubes in the upper and lower layers is 200mm.

[0163] The rapid pyrolysis reaction system of the present invention is used to process lignite, and the particle size is below 1mm. The lignite analysis data, process operation parameters and material balance are shown in Table 1-3, and the rapid pyrolysis time is 30s. It can be seen from Ta...

Embodiment 2

[0173] This embodiment 1 adopts Figure 1-6 The rapid coal pyrolysis system of , wherein, 6 layers of regenerative radiant tubes 15 are distributed at intervals along the height direction of the reactor body 10 in the pyrolysis zone 13, and adjacent regenerative radiant tubes are arranged along the horizontal and reactor body heights The two directions are spaced at the same interval and distributed in parallel. The regenerative radiant tube adopts a circular tube with a diameter of 500mm. The distance between the outer walls of adjacent radiant tubes in the horizontal direction is 500mm, and the outer wall distance between adjacent radiant tubes in the upper and lower layers is 500mm.

[0174] The rapid pyrolysis reaction system of the present invention is used to process lignite, and the particle size is in the range of 1-3mm. The lignite analysis data, process operation parameters and material balance are shown in Table 4-6, and the rapid pyrolysis time is 2s. It can be se...

Embodiment 3

[0184] This embodiment 1 adopts Figure 1-6 The rapid coal pyrolysis system of , wherein, 15 layers of regenerative radiant tubes 15 are distributed at intervals along the height direction of the reactor body 10 in the pyrolysis zone 13, and adjacent regenerative radiant tubes are arranged along the horizontal and reactor body heights The two directions are spaced at the same interval and distributed in parallel. The regenerative radiant tube adopts a circular tube with a diameter of 300mm. The distance between the outer walls of adjacent radiant tubes in each layer is 200mm horizontally, and the outer wall distance between adjacent radiant tubes in the upper and lower layers is 300mm.

[0185] Utilize fast pyrolysis reaction system of the present invention to process lignite, particle diameter is in the scope of 1-3mm, and its lignite analysis data is identical with embodiment 2, process operation parameter and material balance are shown in Table 7-8, fast pyrolysis time 2.9 ...

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Abstract

The invention discloses a coal flash pyrolysis system and method. The coal flash pyrolysis system comprises a flash pyrolysis reactor, a slag cooler and a cooling device. The flash pyrolysis reactor comprises a reactor body, multiple layers of heat storage type radiant tubes, a coal inlet, a distributor, a distribution gas inlet, multiple pyrolysis gas outlets and a semicoke outlet. The slag cooler is connected with the semicoke outlet and is suitable for cooling semicoke. The cooling device is connected with the pyrolysis gas outlets and is suitable for cooling pyrolysis gas so that tar and fuel gas can be obtained. The system can significantly increase the tar yield and greatly simplify the flash pyrolysis reaction technological process.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular, the invention relates to a system and method for rapid pyrolysis of coal. Background technique [0002] The rapid pyrolysis method is an advanced medium-temperature pyrolysis upgrading technology specially for powdery medium-low rank coal, which requires the material to be heated at a high rate in a uniform temperature field. From the perspective of the reaction mechanism, it can make the medium-low rank coal The rapid bond breaking reaction of coal polymers inhibits the secondary pyrolysis reaction and crosslinking reaction of pyrolysis products, reduces the gas and semi-coke products in the pyrolysis process of medium and low rank coal, and increases the tar yield. Therefore, this technology is more efficient. It is suitable for China's national conditions, and can improve the economic and social effects of medium and low rank coal utilization. In the prior art, gas or solid hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B47/00C10B27/00
Inventor 吴道洪陈水渺肖磊
Owner SHENWU TECH GRP CO LTD
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