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A regeneration method and device for a selective catalytic reduction denitrification catalyst

A denitrification catalyst and selective technology, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., to achieve the effects of improved surface conditions, simple devices and processes, and easy access to raw materials

Active Publication Date: 2011-12-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a regeneration method of selective catalytic reduction (SCR) denitrification catalyst, which is cheap, high and simple, starting from improving the pore structure and surface condition of poisoned selective catalytic reduction (SCR) denitrification catalyst, and overcomes the SCR regeneration reported in the past Most of the technologies have the disadvantage that the vulcanization process leads to subsequent use restrictions

Method used

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  • A regeneration method and device for a selective catalytic reduction denitrification catalyst
  • A regeneration method and device for a selective catalytic reduction denitrification catalyst
  • A regeneration method and device for a selective catalytic reduction denitrification catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put a 25*25*40 cellular poisoned SCR denitrification catalyst in a beaker filled with 100mL of deionized water and submerge it, put it into the purge pool for ultrasonic treatment for 10 minutes, and then place it in the immersion cleaning pool for 100mL of deionization Soak in water for 2 hours, then put it into an autoclave, pour 1L of alcohol, heat it to 275°C and keep it for 3 hours, suddenly open the vent valve to make the alcohol evaporate quickly, and finally put the catalyst in 100mL of a partial concentration of 1% by mass percentage In the mixed solution composed of ammonium vanadate solution and ammonium metatungstate solution with a concentration of 5% by mass, shake and evaporate to dryness in a water bath at 80°C, dry it in a drying oven at 110°C for 4 hours, and then put it in a muffle Calcined in a furnace at 500°C for 5 hours. The obtained samples were sieved into 40-60 mesh granules and powders for later use.

[0031] Performance Testing:

[0032] 0....

Embodiment 2

[0037] Put a 25*25*40 cellular poisoned SCR denitrification catalyst in a beaker filled with 100mL of deionized water and submerge it, put it into the purge pool for ultrasonic treatment for 10 minutes, and then place it in the immersion cleaning pool for 100mL of deionization Soak in water for 2 hours, then put it into an autoclave, pour 1L of JFC-1 solution with a mass percentage concentration of 1%, heat it to 275°C and keep it for 3 hours, suddenly open the vent valve to make the JFC-1 solution evaporate quickly, and finally put The catalyst is placed in 100mL of a mixed solution consisting of 1% ammonium metavanadate solution by mass percentage concentration and 5% ammonium metatungstate solution by mass percentage concentration, shaken and evaporated to dryness in a water bath at 80°C, and placed in a drying oven Dry at 110°C for 6 hours, and then put into a muffle furnace for 500°C for calcination for 5 hours. The obtained samples were sieved into 40-60 mesh granules an...

Embodiment 3

[0042] Put a 25*25*40 cellular poisoned SCR denitrification catalyst in a beaker filled with 100mL of deionized water and submerge it, put it into the purge pool for ultrasonic treatment for 10 minutes, and then place it in the immersion cleaning pool for 100mL of deionization Soak in water for 2 hours, then put it into an autoclave, pour 1L of methanol, heat to 275°C and keep it for 3 hours, suddenly open the vent valve to evaporate the methanol quickly, and finally put the catalyst in 100mL of a partial concentration of 1.5% by mass percentage. In the mixed solution composed of ammonium vanadate solution and ammonium metatungstate solution with a concentration of 3% by mass, shake and evaporate to dryness in a water bath at 80°C, dry it in a drying oven at 110°C for 8 hours, and then put it in a muffle furnace Calcined at 500°C for 5 hours. The obtained samples were sieved into 40-60 mesh granules and powders for later use.

[0043] Performance Testing:

[0044] 0.5 g of t...

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Abstract

The invention discloses a regenerating method and a regenerating device for a selective catalytic reduction de-nitration catalyst. In the regenerating method, the industrially applied poisoned SCR (Selective Catalytic Reduction) de-nitration catalyst is subject to ultrasonic pretreatment, de-ionized water rinsing, chambering agent soaking, high-temperature high-pressure evaporation, active material activation and burning in sequence, thereby regenerating the catalyst. The regenerating device comprises a purging pool, a soaking cleaning pool, a high-pressure kettle, an oscillation water bath kettle, a drying box and a muffle furnace. The regenerating method and the regenerating device have the advantages that pore channels are loosened, the pore structure of the catalyst is obviously optimized, the surface appearance of the catalyst is obviously improved, the activity of the regenerated catalyst is greatly promoted, the practical running demand in industry is met, the raw material is easily acquired in the regeneration process, the process is simple, and the production cost of the enterprise using the SCR de-nitration catalyst is greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a regeneration method and device for a selective catalytic reduction (SCR) denitration catalyst. Background technique [0002] Nitrogen oxides (NO x ) is recognized as one of the three major air pollutants, and the photochemical smog generated by its reaction with hydrocarbons seriously endangers human health; in addition, NO x It is also a major cause of acid rain. According to statistics, from 2000 to 2005, NO x The annual growth rate of emissions is as high as 10%. In 2005, the national NO x The total emissions exceeded 19 million tons. If no further control measures are taken, nitrogen oxides will reach about 29 million tons in 2020. Nearly 70% of my country's nitrogen oxide emissions come from the direct combustion of coal, and the power industry is a large coal-burning household in my country, so thermal power plants are one of the main sou...

Claims

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Application Information

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IPC IPC(8): B01D53/96B01D53/90B01D53/56
Inventor 高翔骆仲泱岑可法倪明江宋浩吴卫红徐甸张涌新吴华施正伦周劲松方梦祥余春江王树荣程乐鸣王勤辉
Owner ZHEJIANG UNIV
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