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A method of using chlorine-containing plastics to prepare energy oil and gas while harmlessly removing chromium slag

A technology for chromium slag and plastic, which is applied in the field of using chlorine-containing plastics to prepare energy oil and gas while harmlessly decontaminating chromium slag, can solve problems such as HCl not easily volatilized, Cl pollution, long reaction period, etc., so as to avoid device control of air pressure and save energy. , the effect of reducing the amount of carbon on the surface area

Active Publication Date: 2019-05-24
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Application Information

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Problems solved by technology

Although this method is more practical, due to the implementation of the two-step method, the reaction cycle is long
In addition, during engineering implementation, HCl is not easy to completely volatilize, and some residual Cl is easy to enter the second step of cracking oil and gas to contaminate it

Method used

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  • A method of using chlorine-containing plastics to prepare energy oil and gas while harmlessly removing chromium slag

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example 2

[0027] 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 700-750°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;

[0028] 2. Chlorine-containing plastics are cracked at 500-600°C, and the cracked gas is then sent to the head of the rotary electric furnace, where it is mixed with high-temperature steam and chromium slag outside the furnace 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 during the process, high-quality energy gas is obtained through condensation process after being discharged from the tail of ...

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Abstract

The invention discloses a method for preparing energy oil gas and achieving chromium slag harmlessness through chlorine-containing plastic. The plastic is catalyzed and pyrolyzed at high temperature through hazardous waste chromium slag; meanwhile, the plastic is converted into lower-molecular energy gas more thoroughly under the water vapor gasifying condition, therefore, coking is avoided, and an energy product is more efficient; on the other hand, the generated energy gas converts hexavalent chromium in the chromium slag into trivalent chromium, and then chromium slag harmlessness is achieved.

Description

technical field [0001] The invention relates to a method for preparing energy gas by utilizing chlorine-containing plastics and harmless chromium slag at the same time. Through steam gasification and chromium slag catalysis, the chlorine-containing 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 ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C10B53/07C10B49/16B09B5/00
CPCY02P20/143Y02W30/82
Inventor 张大磊方思源孙箫
Owner QINGDAO TECHNOLOGICAL UNIVERSITY