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

Method and system for treating VOCs gas in sewage treatment plant

A technology for sewage treatment plants and waste water treatment systems, applied in combustion methods, combustion types, incinerators, etc., can solve the problems of high investment and operating costs, and achieve the effects of reducing operating costs, reducing usage, and low operating costs

Inactive Publication Date: 2016-07-13
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
View PDF10 Cites 40 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technologies all have disadvantages such as high investment and operating costs, separate treatment for each emission source, and no resource utilization of waste.

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
  • Method and system for treating VOCs gas in sewage treatment plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The specific process is as figure 1 shown. After mixing the low-concentration VOCs gas produced by the aeration tank, sludge thickening tank and flow sedimentation tank of a sewage treatment plant (the gas volume is 76000Nm 3 / h, the concentration of non-methane total hydrocarbons is 104mg / Nm 3 , calculated as propane) into the rotary adsorption system for concentration to obtain 6000Nm 3 / h high-concentration VOCs gas (non-methane total hydrocarbon concentration is 1310mg / Nm 3 , calculated as propane); then with the 4000Nm generated by the sludge dewatering machine room 3 / h high-concentration VOCs gas (non-methane total hydrocarbon concentration is 3200mg / Nm 3 , calculated as propane) are merged into the combustion and waste heat recovery system. In this case, regenerative combustion is adopted, and the combustion temperature is 600°C.

[0028] The wastewater treatment system has a wastewater treatment capacity of 20.8m 3 / h, 1050Nm after anaerobic treatment 3 ...

Embodiment 2

[0032] The specific process is as figure 1 shown. After mixing the low-concentration VOCs gas produced by the aeration tank, the sludge concentration tank and the flow sedimentation tank of another sewage treatment plant (the gas volume is 98000Nm 3 / h, the concentration of non-methane total hydrocarbons is 135mg / Nm 3 , calculated as propane) into the rotary adsorption system for concentration to obtain 6000Nm 3 / h high-concentration VOCs gas (non-methane total hydrocarbon concentration is 2200mg / Nm 3 , calculated as propane); and then with the 5000Nm generated by the sludge dewatering machine room 3 / h high-concentration VOCs gas (non-methane total hydrocarbon concentration is 2700mg / Nm 3 , calculated as propane) is merged into the combustion and waste heat recovery system. In this case, thermal combustion is adopted, the combustion temperature is 810°C, the residence time is 3.4s, and the air excess coefficient is 23%.

[0033] The wastewater treatment system has a wast...

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 provides a method and a system for treating a VOCs gas in a sewage treatment plant, and is based on a VOCs gas absorption-desorption system, a combustion and waste heat recycling system and a wastewater treatment system. The method comprises the following specific steps: feeding a low-concentration VOCs gas in the sewage treatment plant through the VOCs gas absorption-desorption system so as to obtain a concentrated VOCs gas; combining the concentrated VOCs gas with a high-concentration VOCs gas and gases output from an anaerobic treatment unit in the sewage treatment plant to be introduced into the combustion and waste heat recycling system; introducing a certain amount of fuel and a waste gas methane generated in the wastewater treatment system so as to sufficiently combust the VOCs gas; after combustion, recycling the heat by using a waste heat boiler, feeding a part of cleaned fume at an outlet to the VOCs gas absorption-desorption system to desorb the low-concentration VOCs gas, and combining the other part of the cleaned fume with tail gases of an absorption-desorption device to be fed into a chimney for discharge.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a method for processing VOCs gas, in particular to a method for processing VOCs gas in a sewage treatment plant. Background technique [0002] Volatile organic compounds (VOCs) participate in atmospheric photochemical reactions and can form secondary organic aerosols, which may be one of the main sources of smog. Commonly used VOCs treatment methods include recovery technology and destruction technology. Due to the relatively complex components of waste gas discharged from sewage treatment plants and large fluctuations in concentration, the mainstream process uses destruction technology for VOCs treatment. Among them, the combustion method is a traditional organic waste gas treatment technology, and it is also the most widely used practical technology for VOCs treatment. [0003] CN203336608U has proposed low-concentration VOC gas treatment device, comprises blower...

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): F23G7/06
CPCF23G7/065
Inventor 罗静张军黄海马斌斌
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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