Efficient recovery process and device for waste mercury catalyst

A waste mercury catalyst and high-efficiency technology, applied in chemical recovery, mercury halide, inorganic chemistry, etc., can solve problems such as safety hazards, system instability, corrosion resistance and high temperature resistance, etc., and achieve high recovery rate, cost reduction, and efficient recovery Effect

Active Publication Date: 2018-09-18
张良儒
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Problems solved by technology

[0002] At present, the most commonly used method in the field of waste mercury catalyst recovery is limestone treatment and recovery. In this way, only mercuric chloride can be recovered, and activated carbon cannot be recovered, which increases the cost in a disguised form. There is also a way to recover mercuric chloride by heating and condensing the waste mercury catalyst. , but because the heat-resistant material is not corrosion-resistant, and the corrosion-resistant material cannot withstand high temperature, the entire system is unstable and there are potential safety hazards

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  • Efficient recovery process and device for waste mercury catalyst
  • Efficient recovery process and device for waste mercury catalyst
  • Efficient recovery process and device for waste mercury catalyst

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Embodiment Construction

[0028] In combination with the accompanying drawings of the present invention, the technical solutions of the embodiments of the invention will be further elaborated in detail.

[0029] A process for efficiently recovering spent mercury catalysts, comprising the following steps:

[0030] S1: High-voltage electrostatic treatment: After the waste mercury catalyst is treated with a high-voltage pulse electric field, the waste mercury catalyst to be heated is obtained; the electric field strength of the high-voltage pulse electric field is not less than 30kV / cm, the pulse width is 0-100μs, and the pulse frequency is 1000- 2000Hz.

[0031] S2: waste mercury catalyst heating: the waste mercury catalyst to be heated with a mercury content higher than 1% is in the recovery furnace 40, and the temperature in the recovery furnace 40 reaches at least 320°C, which is 320~500°C, so that the waste mercury catalyst in the waste mercury catalyst The mercuric chloride leaves the activated carbo...

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Abstract

The invention provides an efficient recovery process for a waste mercury catalyst. The process is characterized in that the waste mercury catalyst to be heated is added to a recovery furnace, and therecovery furnace is heated until the internal temperature of the furnace at least reaches 320 DEG C to enable mercury chloride in the waste mercury catalyst to be separated from activated carbon in agaseous form to obtain high temperature gas containing mercury chloride and simultaneously obtain recyclable activated carbon; and water with the temperature not higher than 70 DEG C is adopted to acton the high temperature gas containing mercury chloride, after the high temperature gas containing mercury chloride is in contact with the water, mercury chloride in the high temperature gas is dissolved in the water to obtain recyclable mercury chloride liquid, and the recovered mercury chloride liquid can be repeatedly used for spraying the high temperature gas containing mercury chloride. Theefficient recovery process and device provided by the invention can efficiently recover activated carbon and almost recover all mercury chloride and are efficient and pollution-free.

Description

technical field [0001] The invention relates to the field of recycling waste mercury catalysts, in particular to an efficient recycling process and device for waste mercury catalysts. Background technique [0002] At present, the most commonly used method in the field of waste mercury catalyst recovery is limestone treatment and recovery. In this way, only mercuric chloride can be recovered, and activated carbon cannot be recovered, which increases the cost in a disguised form. There is also a way to recover mercuric chloride by heating and condensing the waste mercury catalyst. , but because the heat-resistant material is not corrosion-resistant, and the corrosion-resistant material cannot withstand high temperature, the entire system is unstable and there are potential safety hazards. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a high-efficiency recovery process and device for waste mercury catalyst, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/36C01B32/39C01G13/04
CPCC01B32/36C01B32/39C01G13/04Y02P20/584
Inventor 张良儒
Owner 张良儒
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