Advancing the Comprehensive Governance of VOCs in the Light Industry: A Comprehensive Exploration of RTO Technology

The light industry is a traditional and advantageous sector in China's national economy, playing a vital role in absorbing labor employment, resolving rural problems, and promoting economic development and social stability. Simultaneously, the light industry is also a key domain for pollution prevention, energy conservation, and carbon reduction.

The exhaust emissions from the light industry possess the characteristics of a large base and a diverse range of types. The country has successively released policy documents such as the "Action Plan for Reducing Volatile Organic Compounds in Key Industries", which specify the comprehensive rectification of VOCs in the light industry like printing, shoe-making, synthetic leather, ink, furniture, plastics, and paper. Hence, how to effectively achieve the prevention and control of VOCs pollution in the light industry is currently a highly concerned matter.

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Introduction to energy-saving technology

Energy saving approach 1: Selection of exhaust gas treatment methods

Purification method

key points

characteristics of exhaust gas

advantages and disadvantages

Combustion method

Burn off organic matter in exhaust gas as fuel or decompose it at high temperatures, with a temperature range of 600-1100

Medium to high concentration

High decomposition temperature, safe, and reliable

Catalytic combustion method

Under the action of an oxidation catalyst, it oxidizes into harmless substances, with a temperature range of 200-400

Low concentration, continuous exhaust

For flameless combustion, low temperature requirements, small restrictions on combustible component concentration and calorific value, but high catalyst price

Adsorption method

Absorbent for physical adsorption,

normal atmospheric temperature

Low concentration

High purification efficiency, but adsorbent has adsorption capacity limitations, which can easily generate solid waste

Absorption method

Physical absorption,

normal atmospheric temperature

Waste gas containing particulate matter

The properties of the absorbent itself are not ideal, and the regeneration treatment of the absorbent is not good

Condensation method

Using low temperature to cool the organic components to below the dew point for liquefaction recovery

High concentration

Require simple components, simple equipment and operation, but not cost-effective; Belonging to chemical equipment that requires inspection

According to the comparison in the above table, medium to high concentration exhaust gas can be treated by the combustion method, while low concentration exhaust gas can be treated by a combination of the adsorption method and the combustion method.

Energy saving approach 2: Performance comparison of different types of regenerative thermal oxidizers (RTOs) [https://www.yurcentrto.com/products/]

RTO type
Two-bed RTO
Three-bed RTO
Rotary Valve RTO

Technology iteration
First generation
Second generation
Third generation

Numbers of regenerative chamber
2
3
12

Piping pressure fluctuation
plus-minus 500Pa
plus-minus 250Pa
plus-minus 25Pa

Occupation of land( based on two-bed RTO)
100
130
65

Weight( based on two-bed RTO)
100
150
80

Comprehensive thermal efficiency
84
92
95

Maximum purification efficiency
95%
99%
99.5%

Structure
4 valves
9 valves
1 valve

Maximum treating range




This release was published on openPR.