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Method for preparing energy source gas from chloride-free plastics and simultaneously performing harmless treatment on chromium slag

A technology of energy gas and chromium slag, which is applied to the removal of solid waste, products, educts, etc., can solve the problems of non-continuous utilization, expensive catalyst, equipment blockage, etc., to avoid device control of air pressure, improve the quality of fuel products, and save energy. energy effect

Active Publication Date: 2016-04-27
QINGDAO TECHNOLOGICAL UNIVERSITY
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Problems solved by technology

The problem is that, on the one hand, the catalyst is relatively expensive and easily deactivated, so it cannot be used continuously; on the other hand, the plastic cracking products are easy to coke without steam vaporization, causing problems such as equipment blockage

Method used

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  • Method for preparing energy source gas from chloride-free plastics and simultaneously performing harmless treatment on chromium slag

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example 2

[0026] 1. After the chromium slag is ground to <2mm, it is transported to the tail of the rotary electric furnace through the screw feeder, and finally transported to the furnace head. Heating by an electric furnace keeps the temperature of the chromium slag at the furnace head stable at 800-1000°C. After being discharged from the furnace head, the chromium slag enters the internal heating rotary kiln head, and then is transported to the kiln tail;

[0027] 2. The chlorine-free plastic is cracked at 500-600°C, and the cracked gas is then sent to the burner head of the rotary electric furnace, where it is mixed with high-temperature steam and chromium slag outside the burner head; the mixed gas of high-temperature steam and plastic cracking gas is mixed with chromium slag in the rotary electric furnace Reverse operation, catalytic cracking reaction occurs in the process, after the tail of the rotary electric furnace is discharged, high-quality energy gas is obtained through t...

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Abstract

The invention relates to a method for preparing energy source gas from chloride-free plastics and simultaneously performing harmless treatment on chromium slag. The hazardous waste of chromium slag is used for performing high-temperature catalytic cracking on plastics. Meanwhile, the plastics are thoroughly converted into low-molecule energy source gas under the steam gasification condition; the coking is avoided; meanwhile, an energy source product can be more efficient. On the other hand, hexavalent chromium of the chromium slag can be converted into trivalent chromium by the generated energy source gas, and the harmless treatment of the chromium slag is realized.

Description

technical field [0001] The invention relates to a method for preparing energy gas by using chlorine-free plastics and simultaneously detoxifying chromium slag. Through steam gasification and chromium slag catalysis, the chlorine-free plastics are cracked and converted into small molecule energy gas. At the same time, the energy gas generated can efficiently reduce the hexavalent chromium in the chromium slag. 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 tw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/07B09B3/00B09B5/00
CPCY02P20/143C10B53/07B09B3/00B09B5/00
Inventor 张大磊郝志鹏方思源
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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