Exhaust gas catalytic combustion treatment device

Exhaust gas catalytic combustion treatment device

What is catalytic combustion?

The catalytic combustion exhaust gas treatment device adopts low-temperature oxidation technology, which heats the organic gas to the decomposition temperature under the action of precious metal catalyst to purify the gas. It has good performance when used in low concentration and high air volume exhaust gas environments. Activated carbon adsorption is generally used as a catalyst, which means that the exhaust gas is heated to the decomposition temperature under the action of the catalyst to purify the gas. Catalysts end the oxidation of organic compounds at low temperatures (200-400 ℃), resulting in low energy consumption, simple operation, safety, and high purification efficiency. They are widely used in the purification of organic waste gases, especially those with low recycling value, such as chemical, painting, insulation materials, enameled wire, coating production, etc. These industries can customize catalytic combustion waste gas treatment devices. Catalytic combustion device is currently a very reasonable method for treating organic waste gas.

Trend of catalytic combustion devices for organic waste gas treatment

Catalytic combustion exhaust gas treatment device is the mainstream product in the future.

The reason is that compared to regenerative combustion (RTO), catalytic combustion (RCO) has the following advantages:

1. Flameless oxidation, safe and efficient, can be installed in explosion-proof production environments.

2. Low energy consumption and low operating costs. Only the fan power is used for adsorption, with a short desorption time of 2-4 hours and a long cycle of 2-4 days.

3. Compact system equipment, high integration, and small footprint

4. Purification facilities have low resistance and can effectively reduce fan power and noise.

Comparison between catalytic combustion exhaust gas treatment device and traditional exhaust gas treatment equipment:

1. Traditional activated carbon adsorption is the process of transferring pollutants, where the gas is adsorbed by activated carbon to form a solid. Once the activated carbon becomes saturated, it loses its adsorption capacity and needs to be replaced. Additionally, the original activated carbon becomes hazardous waste, resulting in high treatment costs.

2. Traditional plasma equipment and UV photocatalytic equipment break down the long molecules of organic waste gas into small molecules, without harmless treatment of organic matter. However, in recent years, due to unsafe factors in the equipment, the environmental protection department has recently issued a document prohibiting the use of UV photo oxygen, plasma and other processes for organic waste gas treatment in new environmental protection equipment.

Introduction to catalytic combustion exhaust gas treatment:

Catalytic combustion exhaust gas treatment is a method that organically combines adsorption concentration units and oxidation units. The essence of the gas-solid phase catalytic reaction that occurs is the deep oxidation process involving active oxygen species.

In the process of catalytic combustion, the role of the catalyst is to reduce the activation energy, while the surface of the catalyst has adsorption, allowing reactants to accumulate on the surface. By utilizing the catalyst, the exhaust gas undergoes flameless combustion under lower ignition temperature conditions, and is oxidized and decomposed into CO2 and H2O. Simultaneously releasing a large amount of heat energy to achieve the goal of removing harmful substances from exhaust gas. It is mainly suitable for organic waste gases with lower concentrations that are not suitable for direct combustion or catalytic combustion and adsorption recovery methods, especially for high air volume treatment scenarios, and can achieve satisfactory economic and social effects. After adsorption purification and desorption, it is converted into organic waste gas with low air volume and high concentration, which is subjected to thermal oxidation treatment, and the heat released by the combustion of organic matter is effectively utilized.

Organic waste gas treatment catalytic combustion composition

The entire device consists of an electronic control system, pre filter, adsorption bed, catalytic combustion bed, flame retardant, related fans, valves, etc.

Selection formula

1. Ensure a small air volume VA to prevent organic waste gas from escaping

VA=K·3600·f·V0(m3/h)

V0=small suction velocity of gas leakage 0.5-0.7m/s

F - Sum of the open area of the equipment (m2)

K - Safety factor 1.05-1.10

2. Ensure that the volatile concentration of the solvent is less than 1/4 of the safe concentration VB under mixed gas explosion

Organic solvent consumption per shift (g)

VB=safe concentration of mixed gas (g/m3) x actual working time per shift (h)

Comprehensive: VA and VB calculation results are used to determine the model of the equipment, which is more reliable and safe

Organic waste gas treatment catalytic combustion parameter table:

Technical characteristics of catalytic combustion device: fully automatic control, easy operation

1. The adsorption purification efficiency is high, the treatment effect is stable, and it ensures that the exhaust gas meets the emission standards.

2. It has manual and automatic desorption functions, uses precious metal catalysts, and converts organic matter through catalytic combustion reactions, with high catalytic efficiency and stable performance.
3. Adopting PLC control, equipped with an operable touch screen, easy to use and operate, and simple to maintain and manage.

4. Equipped with multiple safety measures, the main reactor is equipped with an explosion-proof device, multiple temperature detection points are set up, and it has fault alarm and emergency response capabilities.

5. The device has advanced principles, high-quality materials, stable performance, easy operation, energy-saving and labor-saving, safe and reliable, and no secondary pollution;

6. The activated carbon adsorption bed that adsorbs organic waste gas can recycle the hot gas after catalytic combustion for desorption and regeneration. The desorbed gas is then sent to the catalytic combustion chamber for purification treatment without the need for external energy, resulting in low operating costs and energy savings.

Catalytic combustion process flow

Organic waste gas pretreatment → Organic waste gas activated carbon adsorption → Organic waste gas desorption → Organic waste gas concentration catalytic combustion purification

Exhaust gas catalytic combustion treatment device

Working Principle:

Designed based on the two basic principles of adsorption (high efficiency) and catalytic combustion (energy saving), it adopts dual gas path continuous operation, with one catalytic combustion chamber and two adsorption beds alternately used. Firstly, the organic waste gas is adsorbed onto activated carbon, and when it reaches saturation, the adsorption is stopped. Then, the organic matter is desorbed from the activated carbon using a hot gas flow to regenerate the activated carbon; The detached organic matter has been concentrated (with a concentration several tens of times higher than before) and sent to the catalytic combustion chamber for catalytic combustion into carbon dioxide and water vapor, which are then discharged. When the concentration of organic waste gas reaches 2000mg/m3 or above, the organic waste gas can maintain spontaneous combustion in the catalytic bed without external heating. Part of the exhaust gas after combustion is discharged into the atmosphere, while the majority is sent to the adsorption bed for activated carbon regeneration. This can meet the heat energy requirements for combustion and adsorption, achieving the goal of energy conservation. After regeneration, it can enter the next adsorption; During desorption, purification can be carried out using another adsorption bed, which is suitable for both continuous and intermittent operations.

Scope of application of catalytic combustion device:

It can be widely used for the purification of organic waste gas in painting and coating workshops of automobile, shipbuilding, motorcycle, bicycle, household appliances, and container production plants. It can also be used in conjunction with assembly line equipment such as shoe adhesives, printing iron cans, chemical plastics, printing ink, cables, and enameled wires. The organic solvents that can be used to treat organic waste gas with high air volume and low to medium concentration include benzene, ketones, lipids, alcohols, aldehydes, ethers, alkanes, and their mixtures.

Catalytic combustion production enterprises:

The catalytic combustion RCO produced by our company rapidly oxidizes hydrocarbons in organic waste gas into water and carbon dioxide at low temperatures under the action of a catalyst, achieving the purpose of treatment.

The catalytic combustion process is carried out in a catalytic combustion device. The organic waste gas is preheated to 200-350 ℃ through a heat exchanger before entering the combustion chamber. When passing through the catalyst bed, the molecules of hydrocarbons and oxygen molecules in the mixed gas are adsorbed on the surface of the catalyst and activated.

Due to surface adsorption reducing the activation energy of the reaction, hydrocarbons and oxygen molecules rapidly oxidize at lower temperatures, producing carbon dioxide and water. After regeneration, it can enter the next adsorption; During desorption, purification can be carried out using another adsorption bed, which is suitable for both continuous and intermittent operations.

Company Introduction:

Jiangsu Yaoxian Environmental Equipment Co., Ltd. specializes in the research, development, design, and consulting of air pollution control and dust treatment technologies. In the fields of air pollution control and sewage treatment, relying on high-quality products supported by research and development, we provide solutions with our own core technologies.

The company mainly focuses on air pollution control and dust treatment: organic waste gas adsorption desorption regeneration device, thermal storage incineration purification device RTO, catalytic combustion purification device RCO, steam desorption condensation recovery device, plasma purification device, acid-base waste gas purification tower, toxic and harmful gas absorption tower, stainless steel combustion tower, photocatalytic oxidation device, high-voltage electrostatic device odor gas biological deodorization complete equipment, industrial oil fume purifier, dust treatment system, dust collector complete equipment, integrated treatment equipment. The products are widely used in the photovoltaic industry, solar cells, electronic semiconductors, metallurgy, steel, non-ferrous metallurgy, pharmaceutical and chemical industry, municipal environmental protection and other national large enterprises. With advanced technology, mature processes and timely and thoughtful after-sales service, the company has achieved excellent results and won high praise from many domestic and foreign enterprises.

At the time of its establishment, the company established the concept of people-oriented and technology driven development, always with the mission of "based on the environmental protection industry, intelligent energy conservation and emission reduction, and improving the ecological environment". It fulfills its social responsibility around the company's main business and creates a truly green, pollution-free, low-carbon and environmentally friendly living environment.