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Regeneration method for hydrogen sulfide desulfurizer

A desulfurizer, hydrogen sulfide technology, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve the problem that the main components of the eluent have not yet been found

Inactive Publication Date: 2014-04-02
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching the literature of the prior art, no reports have been found on the use of carbon disulfide as the main component of the eluent for regeneration of the porous desulfurizer by the washing regeneration method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 20 g of the spent activated carbon desulfurizer after use, put it into a sealable airtight container, use carbon disulfide pure reagent as the eluent (the volume ratio of carbon disulfide and diluent is 1:0), carry out immersion treatment to the spent activated carbon desulfurizer and statically Set aside for 120 minutes, filter and separate the eluent and activated carbon desulfurizer, and dry the separated activated carbon desulfurizer at 100°C to constant weight.

[0031] The saturated sulfur capacity of the activated carbon desulfurizer regenerated by the above method can reach 19mg / g desulfurizer, and the saturated sulfur capacity after regeneration is 8% of the saturated sulfur capacity of the unused desulfurizer.

Embodiment 2

[0033] Get 20g of spent activated carbon desulfurizer after use, put it into the washing device (straight glass tube that can be sealed at both ends, length 100mm, internal diameter 20mm, single-side metal mesh sealing), use carbon disulfide and acetone mixed solution as eluent ( The volume ratio of carbon disulfide to acetone release agent is 1:5), and the waste desulfurizer is rinsed, and the eluent is used for a single time, the liquid flow rate is 500ml / min, and the rinse time is 5min. The eluate and the activated carbon desulfurizer were separated by vacuum filtration, and the separated activated carbon desulfurizer was dried at 100° C. to constant weight.

[0034] The saturated sulfur capacity of the activated carbon desulfurizer regenerated by the above method can reach 133mg / g desulfurizer, and the saturated sulfur capacity after regeneration is 56% of the saturated sulfur capacity of the unused desulfurizer.

Embodiment 3

[0036] Take 20g of spent activated carbon desulfurizer after use, put it into the washing device (a straight glass tube that can be sealed at both ends, 100mm in length, 20mm in inner diameter, sealed with a metal mesh on one side), use a mixture of carbon disulfide and cyclohexane as the eluent solution (the volume ratio of carbon disulfide to cyclohexane is 1:3), soaking-leaching the waste desulfurizer, and circulating three times, the soaking time in a single cycle is 5min, the washing speed is 500ml / min, the washing time is 5min, and the washing time is 5min. Dehydration and recycling. The eluent and the activated carbon desulfurization agent were separated by vacuum filtration, and the separated activated carbon desulfurization agent was dried at 100° C. to constant weight.

[0037] The saturated sulfur capacity of the activated carbon desulfurizer regenerated by the above method can reach 151mg / g desulfurizer, and the saturated sulfur capacity after regeneration is 68% o...

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PUM

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Abstract

The present invention relates to a regeneration method for a hydrogen sulfide desulfurizer. The method comprises the following steps: a, preparing an eluent, wherein the eluent adopts carbon disulfide as a main raw material, and adopts a liquid organic reagent as a diluent, and treatments of mixing and stirring are performed to prepare the eluent; b, adopting operation modes of soaking and leaching or adopting a soaking-leaching combined operation mode, and adopting the eluent to wash the waste porous desulfurizer; and c, carrying out treatments of vacuum suction filtration or filtration, and drying on the washed porous desulfurizer to obtain the regenerated porous desulfurizer. According to the method of the present invention, with the dissolution ability of the solvent on the part inside the porous desulfurizer, the materials causing inactivation of the porous desulfurizer are soaked and eluted, such that the performance of the active carbon desulfurizer is restored, wherein the part inside the porous desulfurizer causes desulfurization deactivation.

Description

technical field [0001] The invention relates to a method for regenerating a desulfurizing agent in the technical field of chemical industry, in particular to a method for regenerating a hydrogen sulfide desulfurizing agent. Background technique [0002] Hydrogen sulfide is an acidic gas with biological toxicity, which can be oxidized to sulfur dioxide when dispersed in the air, causing air pollution. An artificial porous material, due to its rich internal pores, large specific surface area, good mechanical properties, low pressure drop and low cost, is a widely used adsorbent, which can be modified for the removal of hydrogen sulfide. Porous desulfurizers are widely used in industrial production. The typical example is the control of hydrogen sulfide in clean coal technology (CCT-Clean Coal Technology). Foreign water plants often use activated carbon desulfurizers to deodorize. After using porous desulfurizers, the inside of the pores A large amount of sulfur element is gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/20B01D53/04
Inventor 孙同华杨学丽张宏波沈亚飞贾金平
Owner SHANGHAI JIAOTONG UNIV