Technique for synchronously recycling biomass and harmless chromium slag by aid of waste heat of blast furnace slag

A blast furnace slag and biomass technology, which is applied in the removal of solid waste, chemical instruments and methods, transportation and packaging, etc., can solve the problems of effective utilization of less heat energy, avoid secondary heat pollution, reduce the amount of carbon on the surface area, and improve the The effect of energy efficiency

Active Publication Date: 2016-05-25
SHANXI WENLONG COAL MINE ENG DESIGN
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Problems solved by technology

But there are very few technologies to effectively use the thermal energy in it

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  • Technique for synchronously recycling biomass and harmless chromium slag by aid of waste heat of blast furnace slag
  • Technique for synchronously recycling biomass and harmless chromium slag by aid of waste heat of blast furnace slag

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[0033] (1) Liquid blast furnace slag at a temperature of 1500-1700°C is poured from the slag tank to the inlet of the granulator, and after granulation, enters the inlet of the rotary reaction cooling device from the outlet, mixes with biomass, and pyrolyzes the biomass , then blast furnace slag and biomass pyrolysis coke are transported to the outlet of the rotary reaction cooling device, and discharged after being cooled by cooling water; the continuous input mass ratio of cooling water for cooling blast furnace slag to blast furnace slag is 1:4; biomass and blast furnace slag The continuous input mass ratio of 1:2;

[0034] (2) The cooling water in step (1) is fed from the outlet of the rotary reaction cooling device, sprayed onto the surface of the blast furnace slag, 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 transported to the rotary reaction cooling device The inlet e...

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Abstract

The invention discloses a novel method for pyrolysing biomass and preparing high-quality fuel gas by the aid of liquid steel slag. Process are controlled, accordingly, the liquid steel slag can be effectively cooled, heat energy of the liquid steel slag can be effectively utilized, and the biomass can be converted into the high-quality energy gas. The technical scheme includes that the method comprises heating the liquid steel slag and gasifying the biomass and cooling water; enabling pyrolysis gas of the biomass and steam to carry out catalytic reaction under catalytic actions of the steel slag; gradually generating the energy gas from tar; enabling alkaline substances in the steel slag to absorb Cl and CO2 in the energy gas. The energy gas mainly comprises CO and H2. The novel method has the advantages that energy can be saved to a great extent while the steel slag is cooled, and the high-quality energy gas can be obtained.

Description

technical field [0001] The present invention is a method for synchronously treating chromium slag and biomass and cooling blast furnace slag, which greatly saves energy while detoxifying chromium slag and obtaining high-grade energy gas. It belongs to the field of environmental protection and low-carbon technology. Background technique [0002] Chromium slag is a by-product emitted during the production of dichromate. Because it contains water-soluble hexavalent chromium, it is extremely toxic. If it is stacked in the open air without treatment, it will cause varying degrees of pollution to groundwater sources, rivers or sea areas, and seriously endanger human health and the growth of animals and plants. [0003] Generally speaking, the current detoxification methods for chromium slag (that is, changing highly toxic hexavalent chromium into trivalent chromium) are divided into two categories: wet detoxification and dry detoxification. But each has its own problems. The we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00B09B3/45
Inventor 张大磊郝志鹏李公伟
Owner SHANXI WENLONG COAL MINE ENG DESIGN
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