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Demercuration and regeneration method for copper-based demercuration adsorbent

An adsorbent, mercury removal technology, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problem of copper-based mercury removal adsorbents that cannot be recycled simple effect

Active Publication Date: 2016-12-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mercury removal and regeneration method can combine the regeneration of the copper-based mercury removal adsorbent with the recovery of mercury, and solve the problem that the existing copper-based mercury removal adsorbent cannot be recycled

Method used

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  • Demercuration and regeneration method for copper-based demercuration adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides a mercury removal and regeneration method for a waste copper-based mercury removal adsorbent, the steps of which are as follows:

[0054] Take the abandoned copper sulfide mercury removal adsorbent with aluminum oxide as the carrier and the low-temperature pyrolysis catalyst in a gas field and mix and preheat in a stirred reactor. The preheating temperature is 50°C and the time is 30 minutes to obtain a preheated mixture; Wherein, the above-mentioned low-temperature pyrolysis catalyst is composed of 90% by mass percentage of copper chloride and 10% by mass of silicon dioxide, and the particle diameter of the silicon dioxide is 4mm. The chlorine molar ratio of copper chloride in the pyrolysis catalyst is 1:2 (ie Hg:Cl=1:2);

[0055] The above-mentioned preheated mixture is placed in a rotary furnace, and then the mixed carrier gas is continuously introduced, and an oxygen-controlled pyrolysis reaction (ie, mercury removal reaction) is carried out...

Embodiment 2

[0062] This embodiment provides a mercury removal and regeneration method for a waste copper-based mercury removal adsorbent, the steps of which are as follows:

[0063] The copper sulfide mercury removal adsorbent and the low-temperature pyrolysis catalyst discarded by the power plant with activated carbon as the carrier are mixed and preheated in a stirred reactor. The preheating temperature is 50 ° C and the time is 30 minutes to obtain a preheated mixture; wherein, The above-mentioned low temperature pyrolysis catalyst is composed of 70% copper chloride by mass percentage and 30% silicon dioxide by mass percentage. The particle diameter of the silicon dioxide is 4mm. The chlorine molar ratio of copper chloride in the catalyst is 1:1 (ie Hg:Cl=1:1);

[0064] The above-mentioned preheated mixture is placed in a rotary furnace, and then the mixed carrier gas is continuously introduced, and an oxygen-controlled pyrolysis reaction (ie, mercury removal reaction) is carried out i...

Embodiment 3

[0070] This embodiment provides a mercury removal and regeneration method for a waste copper-based mercury removal adsorbent, the steps of which are as follows:

[0071] Take the abandoned copper sulfide mercury removal adsorbent with aluminum oxide as the carrier and the low-temperature pyrolysis catalyst in a gas field and mix and preheat in a stirred reactor. The preheating temperature is 50°C and the time is 30 minutes to obtain a preheated mixture; Wherein, the above-mentioned low-temperature pyrolysis catalyst is composed of 90% by mass percentage of copper sulfide and 10% by mass of silicon dioxide, and the particle diameter of the silicon dioxide is 4mm. The sulfur molar ratio of copper sulfide in the decomposing catalyst is 1:2 (ie Hg:S=1:2);

[0072]The above-mentioned preheated mixture is placed in a rotary furnace, and then the mixed carrier gas is continuously introduced, and an oxygen-controlled pyrolysis reaction (ie, mercury removal reaction) is carried out in ...

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Abstract

The invention provides a demercuration and regeneration method for a copper-based demercuration adsorbent. The demercuration and regeneration method for the copper-based demercuration adsorbent includes the following steps that the used copper-based demercuration adsorbent and a catalyst are mixed and preheated, then mixed gas containing oxygen, hydrogen chloride and shielding gas is introduced, a demercuration reaction is carried out, and a solid mixture and desorbed mercury are obtained; the solid mixture is screened and ultrasonically washed, and a crude regenerated copper-based demercuration adsorbent is obtained; the crude copper-based demercuration adsorbent is dried and calcined, and the regenerated copper-based demercuration adsorbent is obtained. The catalyst contains chloride and silicon dioxide, or the catalyst contains sulfide and silicon dioxide. Based on the mass of the mixed gas being 100%, the mass ratio of hydrogen chloride to oxygen to the shielding gas is (5%-10%):(1%-2%):(88%-94%); the ultrasonic washing frequency ranges from 1 MHz to 1.5 MHz.

Description

technical field [0001] The invention belongs to the field of environmental protection and resource reuse, and relates to a mercury removal and regeneration method of a copper-based mercury removal adsorbent, in particular to a mercury removal and regeneration method of a waste gas copper-based mercury removal adsorbent. Background technique [0002] Natural gas solid adsorbents can be divided into two categories whether they are regenerated or not. The renewable ones are usually silver-loaded molecular sieves, while the non-renewable ones usually use metal sulfide mercury removal adsorbents. Compared with silver-loaded molecular sieves, metal sulfide mercury removal adsorbent has better mercury removal effect, but the price is high and it is not easy to regenerate. Among them, the firing temperature in the manufacturing process of copper sulfide mercury removal adsorbent does not exceed 400°C (that is, the maximum tolerance temperature of copper sulfide mercury removal adsor...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/34C10L3/10
CPCB01J20/0237B01J20/3433B01J20/3441B01J20/3483C10L3/101
Inventor 韩中喜李森严启团李璐王淑英
Owner PETROCHINA CO LTD
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