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Technology of utilizing waste heat of blast furnace slag to recycle biomass and produce high-quality fuel gas

A technology of blast furnace slag and biomass, which is applied in the field of environmental protection and low carbon, can solve the problems of not fully and effectively utilizing the heat energy of blast furnace slag and poor quality of tar, so as to avoid secondary heat pollution, reduce the amount of carbon on the surface, and improve energy consumption. efficiency effect

Active Publication Date: 2018-09-07
SHANXI WENLONG COAL MINE ENG DESIGN
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Problems solved by technology

The patent application number 2013101072144 introduces a technology of using blast furnace slag to crack biomass to produce tar. This method uses waste to treat waste, but this method does not fully and effectively utilize the heat energy of blast furnace slag, and the quality of tar produced at the same time is poor

Method used

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  • Technology of utilizing waste heat of blast furnace slag to recycle biomass and produce high-quality fuel gas
  • Technology of utilizing waste heat of blast furnace slag to recycle biomass and produce high-quality fuel gas

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[0025] (1) The liquid blast furnace slag with a temperature of 1500-1700°C is dumped from the slag tank to the inlet end of the granulator. After heat exchange and granulation, it enters the inlet of the primary rotary kiln from the outlet end and is mixed with biomass and some high-temperature fuel gas. , and the biomass is pyrolyzed, and then the mixture is transported to the tail end of the primary rotary kiln, the gas phase part is discharged from the upper end of the tail end, and the solid phase blast furnace slag enters the secondary rotary kiln through the screw feeder, and is discharged at the end of the secondary rotary kiln. Discharge after cooling by cooling water;

[0026] (2) The cooling water in step (1) is added from the outlet end of the secondary rotary kiln, sprayed on the surface of the blast furnace slag and heated and converted into water vapor; the water vapor then flows in the opposite direction with the blast furnace slag and exchanges heat, and is tran...

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Abstract

The invention discloses a novel method of utilizing liquid blast furnace slag waste heat to crack biomass and produce high quality fuel gas. Through technological control, the liquid blast furnace slag can be effectively cooled, and the heat energy of the slag is effectively utilized, and meanwhile the biomass can be transformed into the high quality energy gas. The technical scheme of the technology is as follows: the liquid blast furnace slag is heated, and the biomass and cooling water are gasified; under catalysis of the blast furnace slag, the biomass cracked gas and the vapor are subjected to catalytic reaction; the tar is gradually catalyzed to generate the energy gas mainly containing CO and H2; and meanwhile, Cl and CO2 in the energy gas is absorbed by alkali substance in the blast furnace slag. The technology greatly saves the energy source while cooling the blast furnace slag, and also produces the high quality energy gas.

Description

technical field [0001] The present invention is a method for recycling biomass and cooling blast furnace slag, which greatly saves energy while cooling blast furnace slag, recycling biomass and obtaining high-grade energy gas. It belongs to the field of environmental protection and low-carbon technology. Background technique [0002] my country produces a large amount of biomass every year. Nowadays, most of the biomass is not used effectively, and is burned in the field, forming smog and seriously affecting the atmospheric environment. Biomass pyrolysis utilization is a biomass utilization method, but its product tar is usually difficult to use, and there is also the problem of equipment coking. The patent of application number 2014102110190 introduces a method for producing fuel gas by utilizing sludge and biomass catalytic reforming and cracking. This method converts biomass tar into combustible gas. Although it produces a relatively easy-to-use fuel gas, Its CO2 conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/00C10J3/72C10J3/82
CPCC10J3/00C10J3/72C10J3/82C10J2300/12C10J2300/1603C10J2300/18Y02P20/10Y02P20/129
Inventor 张大磊李公伟郝志鹏
Owner SHANXI WENLONG COAL MINE ENG DESIGN
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