CN-122007083-A - Method for cleaning broken materials through multiple holes based on denitration catalyst

Abstract

The invention discloses a method for cleaning crushed materials by multiple holes based on a denitration catalyst. Through the mode, the method for cleaning the crushed materials based on the denitration catalyst reasonably shortens the cleaning time by improving and optimizing the process steps, improves the cleaning efficiency, reduces the production cost, and effectively improves the cleaning effect by adopting a double cleaning mode of mixing cleaning liquid and pickling liquid, thereby improving the yield of products.

Inventors

• WEI ZIXIANG
• WANG PEIQIANG
• Chai Peijie
• YU ZHIYONG
• YAN WEI

Assignees

• 甘肃青骐骥司碧林环保科技有限公司

Dates

Publication Date

20260512

Application Date

20251231

Claims (4)

1. 1. The method for cleaning the crushed materials of the denitration catalyst based on the multiple holes is characterized by comprising the following steps: step 1, putting crushed materials of a denitration catalyst into pure water for ultrasonic washing; step2, placing the crushed material of the denitration catalyst after washing into pure water for at least two bubbling rinsing; Step 3, preparing a mixed cleaning solution from a sodium hydroxide solution and a cleaning agent according to a volume ratio of 7:3, wherein the cleaning agent comprises, by mass, 10-15 parts of triethanolamine, 5-10 parts of monoethanolamine, 3-7 parts of triton x-100 and 80-90 parts of water; step 4, putting the crushed materials of the denitration catalyst after cleaning into pure water for bubbling cleaning; step 5, preparing sulfuric acid and oxalic acid into pickling solution, putting crushed denitration catalyst into the pickling solution, standing and cleaning for 35min at normal temperature, and then bubbling and rotating and cleaning for 30min; and 6, placing the crushed denitration catalyst into pure water for rinsing, and taking out.
2. 2. The method for cleaning the crushed materials of the denitration catalyst according to claim 1, wherein in the step 2, the bubbling rinsing is performed for 25min once and the bubbling rinsing is performed for 15min twice.
3. 3. The method according to claim 1, wherein in step 3, the solubility of the sodium hydroxide solution is 0.5% -1%.
4. 4. The method for cleaning the crushed materials based on the denitration catalyst according to claim 1, wherein the concentration of sulfuric acid in the pickling solution is 0.05Mol/L, and the concentration of oxalic acid in the pickling solution is 0.02Mol/L.

Description

Method for cleaning broken materials through multiple holes based on denitration catalyst Technical Field The invention relates to the technical field of denitration catalyst regeneration, in particular to a method for cleaning a broken material porous based on a denitration catalyst. Background With the increasing maturity of SCR denitration catalyst regeneration, the catalyst that partly can't regenerate needs to be handled, in order to avoid causing secondary pollution to the environment, so adopts the broken crocus mode of catalyst to retrieve and refines the processing. Recovering valuable elements in the refined catalyst and preparing a new catalyst, thereby forming a closed loop. Because of the high requirements for refining the catalyst, the catalyst which cannot be regenerated needs to be crushed and cleaned first and then is effectively refined. However, the effect of the current cleaning methods for crushed materials is generally not ideal, and thus improvements are needed. Disclosure of Invention In order to solve the technical problems, the invention adopts a technical scheme that: the method for cleaning the crushed materials of the denitration catalyst comprises the following steps: step 1, putting crushed materials of a denitration catalyst into pure water for ultrasonic washing; step2, placing the crushed material of the denitration catalyst after washing into pure water for at least two bubbling rinsing; Step 3, preparing a mixed cleaning solution from a sodium hydroxide solution and a cleaning agent according to a volume ratio of 7:3, wherein the cleaning agent comprises, by mass, 10-15 parts of triethanolamine, 5-10 parts of monoethanolamine, 3-7 parts of triton x-100 and 80-90 parts of water; step 4, putting the crushed materials of the denitration catalyst after cleaning into pure water for bubbling cleaning; step 5, preparing sulfuric acid and oxalic acid into pickling solution, putting crushed denitration catalyst into the pickling solution, standing and cleaning for 35min at normal temperature, and then bubbling and rotating and cleaning for 30min; and 6, placing the crushed denitration catalyst into pure water for rinsing, and taking out. In a preferred embodiment of the present invention, in step 2, the primary bubble rinsing is performed for 25min and the secondary bubble rinsing is performed for 15min. In a preferred embodiment of the invention, in step 3, the sodium hydroxide solution has a solubility of 0.5% to 1%. In a preferred embodiment of the invention, the concentration of sulfuric acid in the pickling solution is 0.05Mol/L, and the concentration of oxalic acid in the pickling solution is 0.02Mol/L. The invention has the beneficial effects that the cleaning time is reasonably shortened by improving and optimizing the process steps, the cleaning efficiency is improved, the production cost is reduced, and meanwhile, the cleaning effect is effectively improved by adopting a double cleaning mode of mixing cleaning liquid and pickling liquid, so that the yield of the product is improved. Detailed Description The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The embodiment of the invention comprises the following steps: a method for cleaning a crushed material based on a denitration catalyst comprises the following steps: And step 1, placing the crushed denitration catalyst into pure water for ultrasonic washing for 20min. And step 2, placing the crushed material of the denitration catalyst after washing into pure water for one bubbling rinsing for 25min. And step 3, putting the crushed denitration catalyst into pure water for secondary bubbling rinsing for 15min. And 4, preparing a mixed cleaning solution from a sodium hydroxide solution and a cleaning agent according to a volume ratio of 7:3, wherein the cleaning agent comprises, by mass, 10-15 parts of triethanolamine, 5-10 parts of monoethanolamine, 3-7 parts of triton x-100 and 80-90 parts of water, placing the rinsed denitration catalyst crushed material into the mixed cleaning solution, heating to 65 ℃, standing and cleaning for 35min, and bubbling and rotating and cleaning for 35min. Further, the solubility of the sodium hydroxide solution is 0.5% -1%. Further, triethanolamine can be replaced by monoethanolamine, and the parts by weight are unchanged. The sodium hydroxide can well remove arsenic elements on the surface of the catalyst sheet material (arsenic is an important element causing catalyst poisoning and also can reduce the service life of the catalyst), and meanwhile, the catalyst micropores can be cleaned, the mic