Treating and curing method before scrapped SCR denitration catalyst burying

A technology of denitrification catalyst and solidification method, which is applied in the field of waste catalyst treatment to achieve the effects of uniform strength, improved efficiency, and favorable integration

Active Publication Date: 2015-09-23
北京济元紫能环境科技有限公司
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve some of the problems existing in the existing waste catalyst trea...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treating and curing method before scrapped SCR denitration catalyst burying
  • Treating and curing method before scrapped SCR denitration catalyst burying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Prepare the mold: the concrete mold is a cube of 300mm×300mm×300mm

[0027] Described concrete composition and mass parts are as follows:

[0028]

[0029] Among them, the fine powder of the spent catalyst is crushed into 10 mm by a crusher first, and then ground into a fine powder of 200 mesh by a grinder.

[0030] 2. The concrete with the internal size of 300mmx300mmx300mm has been processed in advance and poured into several sets of molds. The mold material is steel plate and connected by clips. Stir the above concrete with a mixer at about 10°C indoors and pour it into the mold; after 4 hours, the concrete will be demoulded after initial setting, and it will become a 300mmx300mmx300mm cube.

[0031] 3. Conservation: Arrange the concrete blocks in a single layer neatly. Sprinkle water every 2 hours, and use grass mats and other materials to cover moisture; the curing time is 7 days; the curing ambient temperature is 10-25°C outdoor temperature in May; when th...

Embodiment 2

[0033] 1. Prepare the mold: the concrete mold is a cube of 300mm×300mm×300mm

[0034] Described concrete composition and mass parts are as follows:

[0035]

[0036] Among them, the fine powder of the spent catalyst is crushed into 15 mm by a crusher first, and then ground into a fine powder of 230 mesh by a grinder.

[0037] 4. Process several sets of concrete molds with an inner mouth size of 300mmx300mmx300mm in advance. The mold material is steel plate and connected by clips. Stir the above-mentioned concrete with a mixer at an indoor temperature of about 20°C and pour it into the mold; after 3 hours, the concrete will be demolded after initial setting, and it will become a 300mmx300mmx300mm cube.

[0038] 5. Maintenance: Arrange the concrete blocks in a single layer. Sprinkle water every 2 hours, and use grass mats and other materials to cover and moisturize; the curing time is 7 days; when the temperature of the curing environment is minus 5-8°C outside, move it ind...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a treating and curing method before scrapped SCR denitration catalyst burying. The treating and curing method is characterized by comprising the following steps: (1) making a mould for casting concrete through steel plates; (2) smashing scrapped catalyst through a crusher, and then grinding the scrapped catalyst into scrapped catalyst fine powder through a ball mill; (3) mixing the scrapped catalyst fine powder, Portland cement, sand and water, and fully stirring into concrete to be poured into the mould in the step (1); (4) demoulding the concrete after 3-4 h; (5) placing the demoulded concrete cube blocks in single layer, spraying water once every two hours, and covering with a straw mattress to realize moisture retention and maintenance; (6) when the strength of the concrete cube blocks is not less than 30 mpa, conducting plastic package respectively with thick plastic cloth and then burying, wherein the concrete comprises the following ingredients in parts by weight: 10-15 parts of Portland cement, 60-80 parts of sand, 10-15 parts of scrapped catalyst fine powder and 10-15 parts of water. The method is relatively efficient and environment-friendly in treating the scrapped catalyst.

Description

technical field [0001] The invention relates to the field of waste catalyst treatment, in particular to a treatment and solidification method of the waste SCR denitrification catalyst before landfill. Background technique [0002] At present, the selective catalytic reduction (SCR) flue gas denitrification technology has become a popular choice for nitrogen oxides (NOx) in coal-fired flue gas, flue gas and other waste gases due to its mature technology and high denitrification rate. X ) removal mainstream technology. The most widely used flue gas denitrification catalyst is V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 monolithic catalyst, the catalyst is based on TiO 2 as the carrier, V 2 o 5 , WO 3 and MoO 3 as the active ingredient. TiO in flue gas denitrification catalyst 2 The mass percentage is 85-90%, V 2 o 5 The mass percentage is 1-5%, WO 3 The mass percentage is 5-10%, MoO 3 The mass percentage is 0-5%. [0003] Since the optimal activation temperature of this type...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B28/04C04B18/04B28B11/24
CPCY02W30/91
Inventor 陈颖通
Owner 北京济元紫能环境科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap