Manufacturing method and process device of reactivated cleaning agent for regeneration of honeycomb SCR (selective catalytic reduction) denitration catalyst

Abstract

The invention discloses a manufacturing method and process device of a reactivated cleaning agent for regeneration of a honeycomb SCR (selective catalytic reduction) denitration catalyst. The deactivated SCR denitration catalyst in the process device is regenerated through the steps of pressurized water spraying, ultrasonic cleaning, secondary pressurized water spraying, acid washing, forced air drying, active component supplementation, secondary forced air drying, step-by-step calcination and the like in sequence. By using (NH4)2SO4 as a main component of an acid washing solution, potential hazards caused by sulfuric acid are avoided, and the economic performance and the safety are realized. The components such as EDTA (ethylene diamine tetraacetic acid) are added into the cleaning agent, and under the chelation of the EDTA and heavy metal elements, the toxic action on the denitration catalyst caused by the heavy metal elements can be well eliminated. According to the process, the denitration activity of the deactivated catalyst can be recovered, and meanwhile, the structural strength of the catalyst can be kept. The process device is simple, suitable for regeneration in hoisting transportation, and high in efficiency. By the promotion of the process, the performance of the regenerated honeycomb SCR catalyst can be improved, the replacement cost of the catalyst is saved, and the process has an important significance on NOX control.

Description

technical field

[0001] The invention relates to the engineering technical field of denitrification catalyst regeneration in power plants, in particular to a manufacturing method and process device for realizing the deactivation honeycomb selective catalyst (SCR) denitrification catalyst regeneration, regeneration and revival cleaning agent. It is used to realize the regeneration and utilization of the denitration catalyst and save the cost of catalyst replacement. Background technique

[0002] my country is a country where coal is the main energy source, and the main source of electricity is the direct combustion of coal in thermal power plants. Pollutants emitted by power plants include absorbable solid particles, carbon dioxide, sulfur dioxide, and nitrogen oxides (NOX), which have brought about environmental problems such as greenhouse effect, acid rain, and photochemical aversion. Among them, nitrogen oxide (NOX) emissions reached 12.07 million tons in the first half ...

Examples

Embodiment 1

[0034] Take a piece of honeycomb-type integral block catalyst that has been running for more than 15000 hours. The volume is 122.5cm3. The main components of the catalyst are vanadium, titanium, and tungsten. The cross-sectional size of the catalyst is 150mmx150mm. Cut a piece of 40mmx40mmx40mm. Water spray for 10min. Then put it in a constant temperature water bath ultrasonic cleaner, at a cleaning frequency of 32kHz, 10kW / m 2 sound intensity, wash at 40°C for 10 minutes. Then put it into a blast drying oven to dry for 30 minutes, and put the dried catalyst into the cleaning solution. Preparation of cleaning solution: cleaning solution is composed of (NH4) 2SO4 (0.1~10mol / l), EDTA (0.01~0.2wt%), OP~10, (0.1~5wt%), penetrant JFC (0.1~5wt%), flat Add 0 (0.1-5wt%), oxalic acid (0.03-0.1%wt%), pure water as solvent; regeneration replenishment liquid preparation: regeneration replenishment liquid and oxalic acid as solvent, add ammonium metavanadate (0.5-10wt%) , ammonium parat...

Embodiment 2

[0043] Take a piece of honeycomb-type integral block catalyst that has been running for more than 30,000 hours, with a volume of 122.5cm3 and a volume of 122.5cm3. The main components of the catalyst are vanadium, titanium, and tungsten. The cross-sectional size of the catalyst is 150mmx150mm. Cut a piece of 40mmx40mmx40mm. Spray with pressurized sand filter water for 10 minutes. Then put it in a constant temperature water bath ultrasonic cleaner, at a cleaning frequency of 32kHz, 10kW / m 2 sound intensity, wash at 40°C for 10 minutes. Then put it into a blast drying oven to dry for 30 minutes, and put the dried catalyst into the cleaning solution. Preparation of cleaning solution: cleaning solution is composed of (NH4)2SO4 (0.1~10mol / l), EDTA (0.01~0.2wt%), OP~10 (0.1~5wt%), penetrant JFC (0.1~5wt%), and add Add O (0.1-5wt%), oxalic acid (0.03-0.1%wt%), citric acid (0.05-1%wt%), pure water as solvent; regeneration replenishment liquid preparation: regeneration replenishment ...

technical field

[0001] The invention relates to the engineering technical field of denitrification catalyst regeneration in power plants, in particular to a manufacturing method and process device for realizing the deactivation honeycomb selective catalyst (SCR) denitrification catalyst regeneration, regeneration and revival cleaning agent. It is used to realize the regeneration and utilization of the denitration catalyst and save the cost of catalyst replacement. Background technique

[0002] my country is a country where coal is the main energy source, and the main source of electricity is the direct combustion of coal in thermal power plants. Pollutants emitted by power plants include absorbable solid particles, carbon dioxide, sulfur dioxide, and nitrogen oxides (NOX), which have brought about environmental problems such as greenhouse effect, acid rain, and photochemical aversion. Among them, nitrogen oxide (NOX) emissions reached 12.07 million tons in the first half ...

Examples

Embodiment 1

[0034] Take a piece of honeycomb-type integral block catalyst that has been running for more than 15000 hours. The volume is 122.5cm3. The main components of the catalyst are vanadium, titanium, and tungsten. The cross-sectional size of the catalyst is 150mmx150mm. Cut a piece of 40mmx40mmx40mm. Water spray for 10min. Then put it in a constant temperature water bath ultrasonic cleaner, at a cleaning frequency of 32kHz, 10kW / m 2 sound intensity, wash at 40°C for 10 minutes. Then put it into a blast drying oven to dry for 30 minutes, and put the dried catalyst into the cleaning solution. Preparation of cleaning solution: cleaning solution is composed of (NH4) 2SO4 (0.1~10mol / l), EDTA (0.01~0.2wt%), OP~10, (0.1~5wt%), penetrant JFC (0.1~5wt%), flat Add 0 (0.1-5wt%), oxalic acid (0.03-0.1%wt%), pure water as solvent; regeneration replenishment liquid preparation: regeneration replenishment liquid and oxalic acid as solvent, add ammonium metavanadate (0.5-10wt%) , ammonium parat...

Embodiment 2

[0043] Take a piece of honeycomb-type integral block catalyst that has been running for more than 30,000 hours, with a volume of 122.5cm3 and a volume of 122.5cm3. The main components of the catalyst are vanadium, titanium, and tungsten. The cross-sectional size of the catalyst is 150mmx150mm. Cut a piece of 40mmx40mmx40mm. Spray with pressurized sand filter water for 10 minutes. Then put it in a constant temperature water bath ultrasonic cleaner, at a cleaning frequency of 32kHz, 10kW / m 2 sound intensity, wash at 40°C for 10 minutes. Then put it into a blast drying oven to dry for 30 minutes, and put the dried catalyst into the cleaning solution. Preparation of cleaning solution: cleaning solution is composed of (NH4)2SO4 (0.1~10mol / l), EDTA (0.01~0.2wt%), OP~10 (0.1~5wt%), penetrant JFC (0.1~5wt%), and add Add O (0.1-5wt%), oxalic acid (0.03-0.1%wt%), citric acid (0.05-1%wt%), pure water as solvent; regeneration replenishment liquid preparation: regeneration replenishment ...

Images