Regeneration and application of denitrification catalysts
Publishdate：2019-06-24 Views：17
Catalyst regeneration analysis
Understand the design life, initial performance, operating time, and conditions of failed catalysts, understand the specific reasons for catalyst failure, and conduct advanced physical and chemical test box analysis on catalyst test blocks. Through EDX/XRF/SEM/TGA/BET analysis, determine the deactivation degree of the failed SCR denitrification catalyst.
2、 Pre treatment of deactivated SCR catalyst
1. Send the module to be processed into the automatic cleaning tank, automatically spray high-pressure water, and then enter the manual cleaning tank for the second manual cleaning to remove clogged ash in the catalyst channels.
After automatic spraying and manual clear module identification, the subsequent process is determined based on whether the catalyst monomers in the catalyst module can be recycled.
3、 Regeneration and utilization of denitration catalysts
1. Deep cleaning of renewable utilization modules is carried out using a specialized cleaning solution. The clogging ash in the waste catalyst module is removed using components such as surfactants, emulsifiers, and chelating agents in the specialized cleaning solution. This part of the ash combines with the effective components in the cleaning agent to form a precipitate, which is discharged with the cleaning wastewater. Then, manual cleaning is carried out again to completely remove the clogging ash on the catalyst surface.
2. Conduct ultrasonic cleaning and deep cleaning of the fine pores of the discarded catalyst.
3. Acid washing requires the catalyst to maintain a fixed acidic position during operation in the denitrification system, so that the catalyst can react better with nitrogen dioxide. During the use of catalysts, alkali metals such as potassium and sodium are poisoned, so acid washing is necessary to completely remove alkaline substances from the catalyst pores and ensure that the catalyst acid position meets the activity requirements.
After deep cleaning, the catalyst cleaning module can completely remove impurities such as clogged ash. Adjust the activity in the catalyst module by adding vanadium oxalate solution to meet the requirements of the SCR denitrification system. Then enter the drying room, control the drying temperature at 70 ℃, and discharge the water in the form of steam during the cleaning process.
Therefore, the regeneration and utilization of deactivated SCR denitrification catalysts mainly consist of the following steps: pre cleaning - regeneration analysis - deep cleaning - addition of active materials - drying, etc. There are also details that are determined according to the actual needs of the manufacturer.
Catalyst regeneration analysis
Understand the design life, initial performance, operating time, and conditions of failed catalysts, understand the specific reasons for catalyst failure, and conduct advanced physical and chemical test box analysis on catalyst test blocks. Through EDX/XRF/SEM/TGA/BET analysis, determine the deactivation degree of the failed SCR denitrification catalyst.
2、 Pre treatment of deactivated SCR catalyst
1. Send the module to be processed into the automatic cleaning tank, automatically spray high-pressure water, and then enter the manual cleaning tank for the second manual cleaning to remove clogged ash in the catalyst channels.
After automatic spraying and manual clear module identification, the subsequent process is determined based on whether the catalyst monomers in the catalyst module can be recycled.
3、 Regeneration and utilization of denitration catalysts
1. Deep cleaning of renewable utilization modules is carried out using a specialized cleaning solution. The clogging ash in the waste catalyst module is removed using components such as surfactants, emulsifiers, and chelating agents in the specialized cleaning solution. This part of the ash combines with the effective components in the cleaning agent to form a precipitate, which is discharged with the cleaning wastewater. Then, manual cleaning is carried out again to completely remove the clogging ash on the catalyst surface.
2. Conduct ultrasonic cleaning and deep cleaning of the fine pores of the discarded catalyst.
3. Acid washing requires the catalyst to maintain a fixed acidic position during operation in the denitrification system, so that the catalyst can react better with nitrogen dioxide. During the use of catalysts, alkali metals such as potassium and sodium are poisoned, so acid washing is necessary to completely remove alkaline substances from the catalyst pores and ensure that the catalyst acid position meets the activity requirements.
After deep cleaning, the catalyst cleaning module can completely remove impurities such as clogged ash. Adjust the activity in the catalyst module by adding vanadium oxalate solution to meet the requirements of the SCR denitrification system. Then enter the drying room, control the drying temperature at 70 ℃, and discharge the water in the form of steam during the cleaning process.
Therefore, the regeneration and utilization of deactivated SCR denitrification catalysts mainly consist of the following steps: pre cleaning - regeneration analysis - deep cleaning - addition of active materials - drying, etc. There are also details that are determined according to the actual needs of the manufacturer.
