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The chemical industry can also "zero pollution", and Edvance makes the chemical industry more "beautiful"

Published:

2022-11-10

Solvay (Zhangjiagang) Fine Chemicals Co., Ltd. is an important member of Solvay Group's Consumer and Industrial Specialty Chemicals Division (Novecare). As the world's leading R&D manufacturer of surfactants, all amine products and guar gum, the company has been adhering to the core values of sustainable development for a long time, attaching importance to and committing itself to the development and innovation of new technologies, new products and new applications for environmental protection.

In 2019, Solvay, adhering to the concept of green environmental protection, finally commissioned Edvance to install a three room RTO after comparing several schemes. At present, the equipment is running well, and the online detection is stable and up to standard. The project reduces 8 waste gas outlets of the plant and incinerates the woven and unorganized waste gas. Total VOCs (volatile organic compounds) decreased by 408 tons/year, and odor caused by VOCs and ammonia was improved.

Project overview
Project industry: chemical industry
Installation time: 2019
Installation site: Zhangjiagang, Jiangsu
Treatment process: three room RTO
Air volume: 32000Nm ³/ h
Treatment efficiency: ≥ 99.5%
Thermal efficiency: ≥ 96%
Running time: 24 hours

Analysis of VOCs Control in Fine Chemical Industry

In the process of fine chemical production, organic waste gas is almost discharged in the whole process, and most of the emission sources are not organized emissions, such as: production device leakage, loading and unloading vehicle leakage, equipment pipe valves are not tight, shutdown maintenance venting, oil sump escape and other unorganized emissions. From the perspective of the overall organic waste gas emissions of fine chemical production enterprises, there are unorganized organic waste gas emissions, and it is not easy to deal with them in a timely and effective manner.

Characteristics of fine chemical pollutants:
1. VOCs are characterized by many types of emissions, complex components, large fluctuations in air volume and concentration, and more S, N, CL and other heteroatoms. Combustible gases also have potential safety hazards.
2. The odor problem is serious, affecting the normal life of the surrounding residents; Due to the concentration of chemical industry, the total emission is relatively large.
VOCs emission control technology:

Because various technologies have different characteristics and effective scope of application, corresponding technologies or even multiple technologies should be selected for specific situations. In most cases, the overall treatment efficiency of thermal storage oxidation (RTO) is higher than that of activated carbon adsorption.

Basic scheme for comprehensive treatment of VOCs in fine chemical industry:
1. Source control
Replace with low toxic and odorless raw materials
Tank upgrade, balance pipe
Feeding mode
Loading mode Bottom, submerged
2. Process control
Vacuum exhaust condensation
Solid liquid separation process equipment
Drying process equipment
Packaging equipment
LDAR
Start and stop, clean and purge
3. End control
Optimization of ventilation and gas gathering system
Collection and treatment by classification and quality
·Circulating ventilation enrichment
·Effectiveness of gas gathering
Purification of discharged pollutant gas
Resource based adsorption
Heat recovery oxidation technology
Concentrated thermal oxidation
4. Management control
Raw material account
Monitoring
Operating procedures and standing book of control facilities

Common governance methods:

Due to the pressure of environmental protection, the VOCs control process of "various pre-treatment+high-temperature oxidation" is mainly used in the survival stage of many enterprises at the current standard
Effective gas collection is one of the cores and "current weak links" of VOCs emission control
There is no best but only the most appropriate VOCs control technology
The management and control of VOCs calls for "whole process control to achieve optimal life cycle assessment of control process"
It is the trend of VOCs control development to achieve up to standard emissions and regional joint governance on the basis of cleaner production and recycling
Professionalization and institutionalization are necessary conditions for continuous and stable VOCs control effect

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