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

Microorganism desulfurizing and sulfur recycling method

A sulfur recovery and microbial technology, which is applied in the field of microbial desulfurization, sulfur recovery and microbial desulfurization, can solve the problems of poor stability of desulfurization efficiency, low desulfurization efficiency, high energy consumption, etc., and achieve the promotion of benign development, low operating cost and simple process Effect

Inactive Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low desulfurization efficiency, high cost, poor stability of desulfurization efficiency and high energy consumption in the prior art, the object of the present invention is to propose a process for biological desulfurization of sulfide-containing gas, specifically to provide a A method for microbial desulfurization and sulfur recovery of sulfide-containing chemical tail gas, natural gas or biogas using a high-efficiency internal circulation air-lift bioreactor

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
  • Microorganism desulfurizing and sulfur recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Immobilized Thiobacillus Process

[0035] Take Na 2 S 2 o 3 5~10g / L, KNO 3 5~10g / L, NaHCO 3 2g / L, KH 2 PO 4 Cultivate 0.1g / L medium at 30oC for 2 days, and at the same time moderately aerate every 4 hours to expand the cultivation of the thiobacteria group, and then put 0.5% biological ceramsite as the carrier to make the thiobacteria group adhere and immobilize on the carrier, continue The above culture was carried out for 6-8 days, so that a large number of thiobacteria were attached to the carrier, and the attached biomass was weighed to be 1.263 mg / g, and the immobilization process was completed.

Embodiment 2

[0036] Embodiment 2 gas biological desulfurization process

[0037] Simulated hydrogen sulfide-containing gas content (v / v): 4%H 2 S, 96%N 2 .

[0038] Take Na 2 CO 3 / NaHCO 3 The solution is an absorbing liquid, and Na is added at the same time 2 S 2 o 3 8g / L, KNO 3 5g / L, NaHCO 3 2g / L, KH 2 PO 4 0.1g / L is the nutrient solution, the pH value of the circulating liquid is adjusted to 9.0, and 30ppm sodium dodecylbenzenesulfonate is added as the sulfur modifier. When the reaction temperature is 30oC and the gas-liquid ratio of the absorption tower is 10:1, When the ORP value in the bioreactor is -340mV, the conductivity of the circulating fluid is 40mS / cm, the desulfurization rate is 99.8%, and the sulfur recovery rate is 98.2%.

Embodiment 2-1

[0039] Example 2-1 Gas Biological Desulfurization Process

[0040] Simulated hydrogen sulfide-containing gas content (v / v): 4%H 2 S, 96%N 2 .

[0041] Take Na 2 CO 3 / NaHCO 3 The solution is an absorbing liquid, and Na is added at the same time 2 S 2 o 3 8g / L, KNO 3 5g / L, NaHCO 3 2g / L, KH 2 PO 4 0.1g / L is the nutrient solution, and the pH value of the circulating liquid is adjusted to be 8.0. Adding 10ppm of sodium dodecylbenzenesulfonate is the sulfur modifier. When the reaction temperature is 25oC and the gas-liquid ratio of the absorption tower is 50:1, When the ORP value in the bioreactor is -300mV, the conductivity of the circulating fluid is 30mS / cm, the desulfurization rate is 92.1%, and the sulfur recovery rate is 93.4%.

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

A microorganism desulfurizing and sulfur recycling method. A gas material flow containing hydrogen sulfide is fed into an absorption column and then is subjected to chemical absorption with an alkali solution sprayed from the top of the column in a counter-contact manner, wherein treated purified gas is discharged out from the top of the absorption column. A back-washing apparatus is arranged in the absorption column to wash the sulfur attached to a filling material. A rich solution, in which the hydrogen sulfide is dissolved, is fed into a rich solution tank from the bottom of the absorption column and then is fed into a bio-reactor for aeration, so that a carrier, on which desulfurization bacteria is immobilized, is fluidized and the sulfide in the absorption solution is biologically oxidized to generate elementary sulfur. The regenerated solution containing the sulfur then is fed into a settling tank through an overflow weir of the bio-reactor and a supernatant liquid is fed into a barren solution tank. The supernatant liquid then is fed back to the absorption column for being recycled through a barren solution pump. Sulfur slurry in the bottom layer is discharged through the bottom of the settling tank and then is subjected to solid-liquid separation in a centrifugal machine to obtain biological sulfur. A separated filtrate is fed back to the bio-reactor for being recycled. The bio-desulfurization technology is green and environment-friendly, is energy-saving and emission-reducing and can recycle resources, and has social, economical and environmental benefits.

Description

technical field [0001] The invention belongs to the technology of microbial desulfurization, which is applied in the field of environmental protection and purification. Specifically, it relates to a method for microbial desulfurization and sulfur recovery. Purification treatment of gaseous fluid of hydrogen sulfide and recovery of elemental sulfur can be realized at the same time. Background technique [0002] Biogas is biomass energy and belongs to renewable energy. Biogas contains H 2 S, under hot and humid conditions, it is very corrosive to metal pipes, gas storage cabinets and gas equipment. And when biogas is burned, H 2 S also converts to SO 2 and SO 3 , will not only pollute the environment, but also corrode the equipment, so the biogas needs to remove the H contained in it before use 2 S. From the perspective of comprehensive evaluation of economic indicators and treatment effects, when the latent sulfur content is less than 0.1t / d, dry desulfurization is mor...

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 Applications(China)
IPC IPC(8): B01D53/75B01D53/85B01D53/96B01D53/52C12P3/00
CPCY02A50/20Y02P20/10
Inventor 郝爱香孔京毛松柏
Owner CHINA PETROLEUM & CHEM CORP
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