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Waste mercury catalyst recovery technology and waste mercury catalyst recovery device

A waste mercury catalyst and recovery device technology, applied in the direction of mercury halide, inorganic chemistry, non-metallic elements, etc., can solve the problems of low recovery rate, environmental pollution, etc., and achieve the goal of avoiding the loss of mercury, low energy consumption, and realizing recycling Effect

Active Publication Date: 2014-04-02
NINGXIA JINHAI CHUANGKE CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a waste mercury catalyst recovery process for the above deficiencies, which overcomes the defects of low recovery rate and environmental pollution in the existing recovery process. Circulation, with the advantages of high recovery rate and no pollution to the environment

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  • Waste mercury catalyst recovery technology and waste mercury catalyst recovery device

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Embodiment Construction

[0036] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. Unless otherwise stated, the percentages used in the present invention are volume percentages.

[0037] Examples such as figure 1 As shown, a waste mercury catalyst mercuric chloride recovery device includes a connected dry distillation furnace 1, a cooler 2, a water washing tank 3, an alkali washing tank 4, a fluorosilicone oil cotton adsorption tank 5, a primary activated carbon adsorption tank 6, and a secondary Activated carbon adsorption tank 7, balance pipe 8, liquid collection tank 9, collection pool 10, dissolution tank 11, vacuum pump 12 and buffer tank 13.

[0038] The carbonization furnace 1 is provided with a feed inlet and a gas outlet pipe, the feed inlet is used for inputting waste mercuric chloride c...

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Abstract

The invention discloses a waste mercury catalyst mercuric chloride recovery technology. The technology comprises the following steps: putting a waste mercuric chloride catalyst of which the mercury content is 2.5-4% into a dry distillation furnace; introducing nitrogen from the bottom of the dry distillation furnace; swapping out air inside the dry distillation furnace, and then controlling the pressure inside the dry distillation furnace at -0.09 to 0MPa; heating and warming the dry distillation furnace to reach the temperature being 500-600 DEG C so as to obtain recycled activated carbon, and a mixed gas containing mercuric chloride and nitrogen; introducing the mixed gas into a cooler; cooling to obtain mercuric chloride powder. Oxidation of the activated carbon by an inert gas is protected and avoided by adopting the principle that the boiling point of the mercuric chloride is lower than the coking temperature of the activated carbon; simultaneous recovery of the HgCl2 and the activated carbon is achieved under a negative-pressure closed environment; the recovery rate of mercuric chloride can be up to 70%; the overall recovery technology is a closed circulating technology; closed circulation of a waste residue, an exhaust gas and a wastewater can be achieved; the pollution to the environment is avoided.

Description

technical field [0001] The invention relates to a waste mercury catalyst, in particular to a waste mercury catalyst recovery process and device, and belongs to the technical field of waste mercury catalyst recovery of mercuric chloride production. Background technique [0002] At present, the recovery of waste mercury catalyst is usually to boil the waste mercury catalyst together with lime water to convert mercury chloride into mercury oxide, and then convert mercury oxide into elemental mercury by high temperature. The recovery rate of this method is low, only about 57%. Recovery rate. Due to the use of the recycling method of the sky pot and the earth stove, the environmental pollution is serious. The method in the CN201210467481.8 patent is to introduce chlorine gas to react to recover mercury and mercury chloride during the heating process of mercury-containing waste, and to regenerate mercury-containing waste water after the final dry distillation tail gas treatment. ...

Claims

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Application Information

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IPC IPC(8): C01G13/04C01B31/08C01B21/04C01B32/324C01B32/39
Inventor 毛振华
Owner NINGXIA JINHAI CHUANGKE CHEM TECH
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