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Method for comprehensively utilizing all components of waste denitration catalyst module

A technology for waste denitrification catalysts and denitrification catalysts, applied in chemical instruments and methods, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve problems such as large water consumption, complicated process, and complex process, to ensure safe use , Improve the specific surface area, restore the effect of mechanical properties

Active Publication Date: 2022-05-27
UNIV OF SCI & TECH BEIJING
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  • Abstract
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  • Application Information

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Problems solved by technology

The process of using alkali fusion is complex and energy-intensive, while simple washing and reuse will result in poor product quality
[0004] Patent CN109536721A discloses a method for comprehensive utilization of waste SCR denitrification catalyst resources, including pretreatment, crushing, grinding, ultrasonic enhanced alkali leaching, liquid-solid separation, ion exchange, desorption and chemical precipitation, cleaning and drying, optional The recovered vanadium, tungsten and titanium are used as raw materials for related industries, but the process of recovering vanadium and tungsten is very complicated, and the recovered products are mainly calcium salts and magnesium salts, which cannot be reused for the preparation of denitrification catalysts
Patent CN108687105A discloses a comprehensive utilization method for waste SCR denitrification catalysts, including pretreatment, crushing, vanadium extraction, tungsten extraction and insoluble slag drying. The recovered raw materials can be directly used in the production of new catalysts, but the process recycles The process of vanadium and tungsten is complex and consumes a lot of water

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  • Method for comprehensively utilizing all components of waste denitration catalyst module

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Embodiment example 1

[0032] A method for comprehensive utilization of all components of a waste denitration catalyst module, which is divided into five resource recycling routes: iron frame regeneration, ceramic fiber reuse, regeneration of renewable catalysts, recovery of non-renewable catalysts, and dust preparation of glass-ceramics. Comprehensive recycling of all components of the denitration catalyst module. The quenching of iron frame regeneration is to heat the iron frame material to 820°C, keep the temperature for 60 minutes, and then perform water quenching. The tempering is to heat the quenched iron frame material to 450°C, keep the temperature for 60 minutes, and then air-cool it to room temperature. One of the rust removal methods, the iron frame material after rust removal is re-welded and assembled to form a recycled iron frame. After the ceramic fiber is cleaned, it is made into a regenerated ceramic fiber blanket through beating, slag removal, molding and drying, so as to realize t...

Embodiment example 2

[0036] A method for comprehensive utilization of all components of a waste denitration catalyst module, which is divided into five resource recycling routes: iron frame regeneration, ceramic fiber reuse, regeneration of renewable catalysts, recovery of non-renewable catalysts, and dust preparation of glass-ceramics. Comprehensive recycling of all components of the denitration catalyst module. The quenching of the iron frame regeneration is to heat the iron frame material to 830 ° C, keep the temperature for 55 minutes, and then perform water quenching. One of the pill derusting methods, the iron frame material after derusting is re-welded and assembled to form a recycled iron frame. After the ceramic fiber is cleaned, it is made into a regenerated ceramic fiber blanket through beating, slag removal, molding and drying, so as to realize the reuse of the ceramic fiber.

[0037] The regenerable catalyst unit strip was placed in a 3wt.% NaOH solution, the solution temperature was...

Embodiment example 3

[0040] A method for comprehensive utilization of all components of a waste denitration catalyst module, which is divided into five resource recycling routes: iron frame regeneration, ceramic fiber reuse, regeneration of renewable catalysts, recovery of non-renewable catalysts, and dust preparation of glass-ceramics. Comprehensive recycling of all components of the denitration catalyst module. The quenching of iron frame regeneration is to heat the iron frame material to 840°C, keep the temperature for 50min, and then perform water quenching. The tempering is to heat the quenched iron frame material to 470°C, keep the temperature for 50min, and then air-cool to room temperature. One of the rust removal methods, the iron frame material after rust removal is re-welded and assembled to form a recycled iron frame. After the ceramic fiber is cleaned, it is made into a regenerated ceramic fiber blanket through beating, slag removal, molding and drying, so as to realize the reuse of t...

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Abstract

A method for comprehensive utilization of all components of a waste denitration catalyst module belongs to the field of flue gas denitration and material cyclic utilization, and comprises five resource cyclic utilization routes of iron frame regeneration, ceramic fiber reuse, regeneration of a renewable catalyst, non-renewable catalyst resource recovery and preparation of microcrystalline glass by recycling dust. The comprehensive recycling of all components of the waste denitration catalyst module is realized. In the iron frame regeneration step, the detached iron frame is subjected to heat treatment, rust removal and assembly to obtain the regenerated iron frame. The recycling of the ceramic fibers comprises the following steps: cleaning the detached ceramic fibers, and reproducing the ceramic fibers to prepare a ceramic fiber blanket. And the renewable catalyst is subjected to cleaning and active implantation to obtain the regenerated denitration catalyst. The non-renewable catalyst is recycled through the steps of pretreatment, grinding, cleaning, drying and winnowing. The dust is subjected to component blending, melting, calendering and annealing to obtain the microcrystalline glass. Valuable components of the waste denitration catalyst module are fully utilized, and all-component comprehensive utilization of the waste denitration catalyst module is achieved.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of all components of a waste denitration catalyst module, belonging to the field of flue gas denitration and material recycling. Background technique [0002] Selective Catalytic Reduction (SCR) technology is the key to realize NO in industrial flue gas. x It is an important technology of ultra-low emission. The denitration catalyst used is easily deactivated by flue gas flushing and poisoning by harmful components, so the catalyst has a short service life. The deactivated waste denitration catalyst is a hazardous waste specified in the "National Hazardous Waste List", and its environmental risk is extremely high, but its recycling value is extremely high. In 2014, the Ministry of Ecology and Environment issued the "Notice on Strengthening the Supervision of Waste Flue Gas Denitration Catalysts", requiring the improvement of the regeneration, utilization and disposal capacity of waste flu...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00B01J38/00B01J38/02B01J38/60B01J38/64C03C10/00B09B101/95
CPCB09B5/00B01J38/64B01J38/02B01J38/60B01J38/00C03C10/0063Y02P20/584
Inventor 张深根张柏林
Owner UNIV OF SCI & TECH BEIJING