Synchronization technology of ensuring biomasses to be resourceful and chromium slag to be harmless by utilizing steel slag waste heat

A biomass and resource utilization technology, applied in the direction of biofuel, solid waste removal, catalytic conversion of impurities, gas purification, etc., can solve the problems of effective utilization of less heat energy, etc., to avoid secondary heat pollution, reduce emissions, and improve energy efficiency effect

Inactive Publication Date: 2016-07-06
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Synchronization technology of ensuring biomasses to be resourceful and chromium slag to be harmless by utilizing steel slag waste heat
  • Synchronization technology of ensuring biomasses to be resourceful and chromium slag to be harmless by utilizing steel slag waste heat

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example 2

[0033] (1) Liquid steel slag with a temperature of 1500-1700℃ is poured from the slag tank to the inlet end of the wheel shifter. After quantitative shifting and preliminary crushing, it enters the entrance of the drum crushing device from the outlet end and mixes with biomass. Biomass pyrolysis, then the steel slag and biomass pyrolysis coke is sent to the outlet end of the drum crushing device, and discharged after cooling by cooling water; the continuous input mass ratio of cooling water to steel slag for cooling steel slag is 1:4; biomass and steel slag The continuous input quality ratio is 1:2;

[0034] (2) The cooling water in step (1) is added from the outlet end of the drum crushing device, sprayed on the surface of the steel slag and converted into water vapor after being heated; the water vapor then flows countercurrently with the steel slag and exchanges heat, and is sent to the inlet end of the drum crushing device It is mixed with biomass pyrolysis gas; the mixed gas...

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Abstract

The invention relates to a method of synchronously treating liquid steel slag, chromium slag and biomasses. According to the method, by heating the steel slag, gasifying the biomasses and utilizing chromium slag as hazardous wastes and other catalysts to catalyze and crack biomasses at high temperature, the biomasses are more completely converted to low-molecule high-temperature energy gas under the condition of gasifying water vapor, so that coking on the surface of the chromium slag is prevented; and meanwhile, by heating the chromium slag with utilization of the high-temperature energy gas and reducing hexavalent chromium in the chromium slag into trivalent chromium, the energy gas is cooled as well, and CO2 and Cl in the energy gas are absorbed by alkaline substances in the chromium slag. According to the process, when the chromium slag is treated to be harmless, and the steel slag is cooled, the energy is greatly saved, and the high-grade energy gas is also obtained.

Description

Technical field [0001] The invention is a method for synchronously processing chromium slag and biomass and cooling steel slag, which not only harmlessly converts chromium slag and obtains high-grade energy gas, but also greatly saves energy. 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 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 of chromium residue (that is, the highly toxic hexavalent chromium becomes trivalent chromium) are divided into two categories: wet detoxification and dry detoxification. But all have their own problems. Wet method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C10B53/02C10K1/34
CPCC10B53/02C10K1/34B09B3/00B09B3/45Y02P20/129Y02E50/10
Inventor 张大磊李公伟郝志鹏
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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