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Desorption regeneration method of adsorption denitrifier

An adsorption denitrification and adsorption-desorption technology, which is applied in the field of purification, can solve the problems of low production efficiency and time-consuming, and achieve the effects of saving time, realizing dissolution and removal, and improving regeneration efficiency

Active Publication Date: 2011-04-06
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first technical problem to be solved by the present invention is that in the prior art, the denitrification agent needs to be taken out from the adsorption desorption tower during the desorption regeneration of the adsorption denitrification agent, and then regenerated into the adsorption desorption tower, which is time-consuming. The problem of low production efficiency, and then provide a regeneration method suitable for large-scale industrial production, which can directly desorb the saturated adsorption denitrification agent without taking it out of the adsorption desorption tower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Set 100L of activated carbon saturated adsorption denitrification agent on a fixed bed, use methyl isobutyl ketone polar solvent at a volume space velocity of 0.5h -1 Under certain conditions, desorb and regenerate the saturated adsorption denitrification agent through a fixed bed of saturated adsorption denitrification agent; then, in a hydrogen atmosphere, dry the above-mentioned desorbed adsorption denitrification agent bed at 100°C for 10 hours, That is, the polar solvent remaining on the surface layer of the adsorption denitrification agent can be removed, so as to obtain the adsorption denitrification agent after desorption regeneration.

Embodiment 2

[0024] 100L of 60wt% Al 2 o 3 and 40wt% SiO 2 The composition of the saturated adsorption denitrification agent is set on a fixed bed, and the polar solvent of methyl tert-butyl ether is used at a volume space velocity of 1.0h -1 Under certain conditions, the saturated adsorption denitrification agent is desorbed and regenerated through the fixed bed of the saturated adsorption denitrification agent; then, in the air atmosphere, the above-mentioned desorbed adsorption denitrification agent bed is dried at 130 ° C for 6 hours, That is, the polar solvent remaining on the surface layer of the adsorption denitrification agent can be removed, so as to obtain the adsorption denitrification agent after desorption regeneration.

Embodiment 3

[0026] 100L of 70wt% Al 2 o 3 and 30wt% SiO 2 The composed saturated adsorption denitrification agent is set on a fixed bed, using ethyl acetate polar solvent at a volume space velocity of 2.0h -1 Under certain conditions, desorb and regenerate the saturated adsorption denitrification agent through a fixed bed of saturated adsorption denitrification agent; then dry the desorbed adsorption denitrification agent bed at 150°C for 5.5 hours in an air atmosphere , that is, the polar solvent remaining on the surface layer of the adsorption denitrification agent can be removed, so as to obtain the adsorption denitrification agent after desorption regeneration.

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PUM

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Abstract

The invention relates to a desorption regeneration method of an adsorption denitrifier for use in diesel oil hydrorefining pretreatment process. The regeneration method is characterized by using one or a plurality of polar solvents including methyl isobutyl ketone, ethyl acetate, methanol, methyl tert-butyl ether and ethylbenzene to carry out fixed bed desorption regeneration on a saturated adsorption denitrifier that has adsorbed nitrides, and then using gas to dry an adsorption denitrifier bed layer at temperature of 100-200 DEG C. The desorption regeneration method helps realize full dissolution and desorption of basic nitrides adsorbed by the saturated adsorption denitrifier in appropriate polar solvent; and directly carry out desorption regeneration treatment on the saturated adsorption denitrifier in an adsorption and desorption tower for diesel oil adsorption denitrification treatment without removing the adsorption denitrifier from the adsorption and desorption tower, thus saving much time and improving regeneration efficiency.

Description

technical field [0001] The invention relates to a desorption regeneration method of an adsorption denitrification agent, in particular, it can be used for the desorption regeneration of a saturated adsorption denitrification agent after adsorption denitrification of catalytic diesel oil, and belongs to the technical field of purification. Background technique [0002] Diesel fuel is the most important power fuel in developing countries. It has high thermal power efficiency, low fuel specific consumption, and is relatively economical. high share. [0003] In the actual use process, the requirements for diesel performance are mainly divided into the following aspects: (1) ignitability, to ensure that diesel has a high and suitable cetane number through treatment; (2) evaporability, that is, to ensure that diesel oil It has a suitable light distillate, which ensures that the diesel has good startability (easy to burn) and at the same time does not cause knocking; (3) higher fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34
Inventor 荆军航韩崇文陈艳春梁永辉张素霞宋金花宗良韩玉环徐彩霞刘洁蒲延芳闻学兵
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD