Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A preparation method of activated carbon for treating automobile exhaust in expressway tunnels

A technology for automobile exhaust and highways, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of increased resistance of activated carbon filter devices, failure to meet the ventilation requirements of tunnels, and decreased gas flow, etc., to achieve tar The effect of increasing the content, increasing the effective service life, and maintaining the constant adsorption capacity

Active Publication Date: 2022-03-01
宁夏茂华活性炭有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In some tunnels with a long length, in order to ensure the air quality in the tunnel, a fan with a large power or flow rate will be used for ventilation. Under the condition of limited diameter of the ventilation pipe, the gas flow rate increases, and the ventilation speed needs to be faster. , in the prior art, due to the relatively small gap between activated carbon rods with small diameters, the resistance of gas passing through the activated carbon filter device increases, resulting in a decrease in gas flow rate, which cannot meet the ventilation requirements of the tunnel

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
  • A preparation method of activated carbon for treating automobile exhaust in expressway tunnels
  • A preparation method of activated carbon for treating automobile exhaust in expressway tunnels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Use anthracite Taixi coal with an ash content of 3% as the main material, and pass the washed clean coal through the Raymond milling process to obtain coal powder with a mesh size greater than 200 mesh;

[0027] Step 2: According to the ratio of mass fractions: take 38 parts, 40 parts, 42.5 parts, 45 parts, 48 ​​parts of tar, respectively, and fully mix and stir with 100 parts of coal powder and 4 parts of water prepared in S1 step to obtain five parts of mixture , using a four-axis hydraulic press with a cylinder diameter of 500mm and a mold to press the mixture into five kinds of 9mm diameter carbon bars with different coal tar ratios, and the pressure of the hydraulic press is 11.5MPa;

[0028] Step 3: cutting the charcoal rods prepared in step S2 into cylindrical charcoal rods with a length of 14 mm;

[0029] Step 4: Cool the charcoal rods prepared in step S3 for at least 36 hours, so as to fully eliminate the internal stress;

[0030] Step 5: Gradually hea...

Embodiment 2

[0036] Step 1: Use anthracite Taixi coal with an ash content of 3% as the main material, and pass the washed clean coal through the Raymond milling process to obtain coal powder with a mesh size greater than 200 mesh;

[0037] Step 2: According to the ratio of mass fractions: take 42.5 parts of tar, 100 parts of coal powder prepared in S1 step, and 4 parts of water after fully mixing and stirring to obtain a mixture. Divide the above mixture into 5 equal parts and put them in batches. Put it into the mold, adjust the pressure value of the four-axis hydraulic press with a cylinder diameter of 500mm to 8MPa, 10MPa, 11.5MPa, 13MPa, and 15MPa, and press the mixture into five batches of carbon rods with a diameter of 9mm;

[0038] Step 3: cutting the charcoal rods prepared in step S2 into cylindrical charcoal rods with a length of 14 mm;

[0039] Step 4: Cool the charcoal rods prepared in step S3 for at least 36 hours, so as to fully eliminate the internal stress;

[0040] Step 5:...

Embodiment 3

[0046] Step 1: using anthracite Taixi coal with an ash content of 3% and 6% respectively as the main material, and passing the washed clean coal through the Raymond milling process to obtain two types of coal powder with a mesh size greater than 200 mesh;

[0047] According to the ratio of mass fraction: take 100 parts of the ash obtained in the S1 step to be 3% coal powder and 100 parts of the ash obtained in the S1 step to be 6% coal powder, and fully mix and stir with 42.5 parts of tar and 4 parts of water , to obtain two kinds of mixtures, put the above mixtures into the mold in batches, use the cylinder diameter of 500mm four-axis hydraulic press and the mold to press the mixture into two kinds of 9mm diameter carbon strips with different ash content of the main material, and the pressure of the hydraulic press is 11.5MPa ;

[0048] Step 3: cutting the charcoal rods prepared in step S2 into cylindrical charcoal rods with a length of 14 mm;

[0049]Step 4: Cool the charco...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing activated carbon for treating automobile tail gas in expressway tunnels. After Taixi coal is used as the main material, coal powder, tar and water are mixed and pressed according to the ratio of 100:40-45:3-5. into carbon strips, and then cut the carbon strips into cylindrical carbon rods of equal length. After carbonization and activation processes, a kind of activated carbon with adsorption properties and suitable for treating automobile exhaust in expressway tunnels is prepared.

Description

technical field [0001] The invention relates to a preparation method of activated carbon, in particular to a preparation method of activated carbon for treating vehicle tail gas in expressway tunnels. Background technique [0002] In some cities in southwestern my country, urban tunnels play an important role in urban traffic due to the many mountains in the city. With the development of cities, more and more urban tunnels have sprung up as the times require. However, due to the relatively closed structure of highway tunnels, vehicles will emit a large amount of exhaust gas after passing through. Using ventilation devices alone to deal with the exhaust gas in the tunnel will still cause pollution to the atmospheric environment. If the exhaust gas in the tunnel is not treated in time, as As time goes by, the concentration of car exhaust in the tunnel rises. When people drive through the tunnel, it can be a health hazard. Therefore, the purification of the gas in the tunnel...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20B01J20/20B01J20/28B01J20/30B01D46/00B01D53/02
CPCB01D39/2055B01J20/20B01J20/28014B01D53/02B01D46/00B01D46/0036
Inventor 马馨
Owner 宁夏茂华活性炭有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com