Rapid emergency treatment method of methyl mercaptan odor

A treatment method, a technology of methyl mercaptan, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of long cycle, cumbersome reaction process, complex equipment, etc., and achieve mild reaction conditions, convenient transportation, good processing effect

Inactive Publication Date: 2013-05-22
OCEAN UNIV OF CHINA
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of odor mainly focuses on the treatment of normal emissions, and there is less treatment of emergency odors such as industrial production, odor transportation and storage, and sudden odor emissions. The physical processes mainly include condensation, activated carbon adsorption and Water absorption, etc., can quickly treat odors, and is highly adaptable to a large amount of odors, but generally requires relatively large equipment, only the transfer of odors occurs, but not completely removed, and follow-up is required for the adsorbed or absorbed odors The processing, processing and equipment replacement costs are high; the ...

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
  • Rapid emergency treatment method of methyl mercaptan odor
  • Rapid emergency treatment method of methyl mercaptan odor
  • Rapid emergency treatment method of methyl mercaptan odor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The details are as follows: prepare potassium persulfate containing different concentrations (0mol / L, 0.21×10 -3 mol / L, 0.42×10 -3 mol / L, 0.84×10 -3 mol / L, 1.68×10 -3 mol / L) of pH=12 of 500mL sodium hydroxide lye; the intake of air keeps 1.5L / min, the intake of methylmercaptan keeps 40mL / min, and the concentration of methylmercaptan gas after mixing is 80ppm; The showering intensity is 120mL / min; the concentration of methyl mercaptan in the water sample and the concentration of methyl mercaptan in the tail gas are sampled every 10 minutes, and the removal rate of methyl mercaptan in the whole system and the removal rate of methyl mercaptan absorbed in the solution are calculated respectively;

[0014] The concentration of methyl mercaptan in the tail gas is directly detected by a methyl mercaptan detector;

[0015] The methyl mercaptan in the solution is detected by spectrophotometry: the reaction between methyl mercaptan and Ellman reagent produces a yellow product,...

Embodiment 2

[0025] Prepare 500mL of sodium hydroxide lye with pH=12 containing potassium peroxomonosulfate, the concentration of potassium peroxymonosulfate is 0.84×10 -3 mol / L. The intake of air is maintained at 1.5L / min, and the intake of methyl mercaptan is changed to maintain 30mL / min, 40mL / min, and 50mL / min respectively, and the concentration of mixed methyl mercaptan gas is 60ppm, 80ppm, and 100ppm respectively; spray The intensity is 120mL / min; samples are taken every 10 minutes to detect the concentration of methyl mercaptan in the water sample, and the removal rate is calculated.

[0026] result:

[0027] Table 2-1. Potassium monoperoxymonosulfate to the removal rate (%) of different concentrations of methyl mercaptan in the system under the condition of pH=12

[0028]

[0029] The results show that at 0.84×10 -3 When mol / L of potassium hydrogen persulfate, the removal rate of methyl mercaptan in the whole system increases with the decrease of the concentration.

[0030] T...

Embodiment 3

[0034] Prepare 500mL of sodium hydroxide lye with pH=12 containing potassium peroxomonosulfate, the concentration of potassium peroxymonosulfate is 0.84×10 -3 mol / L. The intake of air is kept at 1.5L / min, the intake of methyl mercaptan is kept at 50mL / min, the concentration of methyl mercaptan gas after mixing is 100ppm respectively; the spray intensity is 120mL / min; samples are taken every 10min to detect formazan in water samples The concentration of mercaptans was used to calculate the removal rate.

[0035] This example is to carry out continuous addition experiment, add potassium bisulfate (0.84 × 10 -3 mol) and sodium hydroxide (10 -2 mol).

[0036] result:

[0037] Table 3. Continuous addition of potassium hydrogen persulfate to the removal rate (%) of methyl mercaptan odor in the system

[0038] time (min)

[0039] The result shows that when there is potassium hydrogen persulfate in the solution, the methylmercaptan concentration removal rate reaches 100...

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

No PUM Login to view more

Abstract

The invention relates to a continuous and rapid emergency treatment method of methyl mercaptan odor by employing chemical absorption and utilizing an oxidation method. The method comprises the following steps: absorbing methyl mercaptan odor under the normal temperature and normal pressure reaction conditions by utilizing alkali liquor with the pH of not less than 11, and oxidizing and removing the methyl mercaptan odor by utilizing peroxymonosulfate. The method has the advantages that the alkali liquor absorption and oxidation removal advantages are combined, and the methyl mercaptan odor which is difficult to dissolve and treat is treated in the odor; the methyl mercaptan can be fully oxidized and is difficult to transfer; the peroxymonosulfate and the methyl mercaptan reaction is fast and is instantaneously carried out, secondary pollution is avoided, and the method is suitable for performing rapid emergency removal on the methyl mercaptan odor in the accident under alkaline conditions; continuous air suction can be kept in the reaction system, and the gas is continuously recycled; the reaction conditions are mild under normal temperature and normal pressure; and the method is easy to operate and good in treatment effect.

Description

technical field [0001] The invention belongs to the technical field of malodorous gas treatment, and in particular relates to an emergency and rapid treatment method for removing the odor of methyl mercaptan, in particular to a method for removing the odor of methyl mercaptan by chemical absorption and oxidation. Background technique [0002] Wastewater treatment plants, public facilities, petrochemical plants, paper mills and other factories and livestock and poultry farms will produce a large amount of malodorous gas, which has a great impact on the surrounding environment. With the development of society, people pay more and more attention to malodorous gas. . The composition of malodorous gas is relatively complex, consisting of sulfides, nitrogen compounds and some volatile organic compounds. Methyl mercaptan gas is one of the main odorous gases, which mainly comes from kraft pulp, oil refining, gas, pharmaceuticals, pesticides, synthetic Resin, synthetic fiber, rubber...

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): B01D53/78B01D53/48
Inventor 杨世迎王雷雷赵腊娟冯琳玉邓闪闪郭姿璇樊铮成晓谕
Owner OCEAN UNIV OF CHINA
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