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Coupling technology adopting lignite-gasification gas production and dry distillation upgrading

A technology of coal gasification and dry distillation, which is applied in the field of coal chemical industry, can solve problems such as complex system configuration, and achieve the effects of full utilization of heat, reduction of CO2 emission ratio, and high effective gas composition

Inactive Publication Date: 2016-04-20
CHINA TIANCHEN ENG +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, coal gasification requires a gasifier system with two operating conditions, which need to produce normal temperature gasification gas and high temperature coal gas respectively, and the system configuration is more complicated

Method used

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  • Coupling technology adopting lignite-gasification gas production and dry distillation upgrading
  • Coupling technology adopting lignite-gasification gas production and dry distillation upgrading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw material lignite A whose particle size is less than 20 mm has a water content of 10%. The raw coal A is divided into two paths. The first path enters the gasifier 1 after simple raw coal crushing, and enters the fluidized bed gasifier 1 together with the oxygen B from the air separation unit and the supplementary part of the steam C for gasification reaction. , the central reaction temperature of gasifier 1 is 1000°C, and the gasification pressure is 1.0MPaG. The carbon in coal reacts rapidly in the environment of high temperature and oxygen to produce CO, H 2 and methane-based synthesis gas. There is a gas distributor at the bottom of the gasifier 1 to ensure smooth, stable and even fluidization in the gasifier 1 . The high-temperature synthesis gas of about 900°C produced by the gasification reaction directly enters the gas distributor at the bottom of the carbonization furnace 2 through the connecting pipe at the top of the gasification furnace. The gasific...

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Abstract

The invention provides a coupling technology adopting lignite-gasification gas production and dry distillation upgrading. A coal gasification device and a coal-produced semi-coke dry distillation device are connected in series for use, high-temperature synthesis gas produced from coal after gasification in a gasification furnace directly enters a dry distillation furnace, is taken as a dry distillation heat-carrying gas and is sufficiently contacted with the coal in the dry distillation furnace, H2O and CO2 in the synthesis gas are contacted with a hot carbon material for further reaction, effective gas composition in the synthesis gas is increased, and a semi-coke product, coal tar and dry distillation gas are obtained through pyrolysis and dry distillation upgrading of the coal. The semi-coke product is collected from the bottom of the dry distillation furnace, a mixture of the coal tar, the dry distillation gas and the synthesis gas is collected from the top of the dry distillation furnace, and a coal tar product and a synthesis gas product are obtained through cooling separation. Compared with a simple lignite-gasification gas production technology, the effective gas composition of the produced synthesis gas is higher, the CO2 emission proportion of a traditional coal gasification technology can be reduced, the heat of the whole technological procedure is sufficiently utilized, additional heat input is not required for semi-coke production through dry distillation of the coal, and the energy utilization efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, in particular to a coupling process of lignite gasification gas production and dry distillation upgrading. Background technique [0002] Semi-coke, commonly known as semi-coke, is generally a solid product obtained by low-temperature dry distillation of peat, lignite and high-volatile bituminous coal. After more than ten years of development in China, the semi-coke industry has formed a coal dry distillation-based, including metal magnesium, Industrial chains of high-energy-carrying industries such as ferroalloys, fertilizers, calcium carbide and power generation. However, the organizational structure of the semi-coke industry is relatively low, the layout of enterprises is scattered, and there is a lack of comprehensive utilization of synchronous supporting resources. [0003] In recent years, my country's coal chemical industry has developed rapidly, and high-quality resources s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/06C10J3/20C10J3/84C10B49/02C10B53/00
CPCC10B49/02C10B53/00C10J3/06C10J3/20C10J3/84C10J2300/093C10J2300/0976C10J2300/16Y02P20/10Y02P20/129
Inventor 胡文佳林彬彬杜晓丹
Owner CHINA TIANCHEN ENG
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