Waste Gas Treatment Archives - aier https://www.airepe.com/feiqizhili/ 用先进技术实现环保梦想 Wed, 28 Feb 2024 02:30:35 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.2 http://www.airepe.com/wp-content/uploads/2022/08/favicon.png Waste Gas Treatment Archives - aier https://www.airepe.com/feiqizhili/ 32 32 Regenerative Thermal Oxidizer (RTO) http://www.airepe.com/xureshireyanghuaqi/ Thu, 01 Dec 2022 06:12:24 +0000 http://www.airepe.com/?p=975 The Regenerative Thermal Oxidizer is referred to as RTO, and its full name is (Regenerative Thermal Oxidizer). The basic principle is to oxidize organic waste gas (VOCs) to CO2+H2O under high temperature conditions (≥760°C), and the purification efficiency is as high as 99%. The high-temperature gas generated by oxidation flows through a special ceramic regenerator, which makes the ceramic body heat up and "reserve heat". The next process is that the exhaust gas passes through the ceramic that has "regenerated heat", and the heat of the ceramic is transferred to the exhaust gas, and the organic waste gas passes through. Ceramics are used as the carrier of the heat exchanger to perform heat exchange repeatedly, thereby saving fuel consumption for raising the temperature of exhaust gas, reducing operating costs, and the heat recovery efficiency is as high as 95%. Under medium and high concentration conditions, RTO can export waste heat to the outside and use it in the form of steam, hot air, hot water, etc., and achieve economic benefits while meeting environmental protection goals.

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How the three-tower RTO works:

The raw gas is introduced into the valve box through the main fan, and the gas enters the heat exchanger through the valve and the diversion hole. When the raw gas passes through the thermal storage ceramic, the gas is preheated by the heat inside the ceramic to near the oxidation temperature. The pollutants are then oxidized in the combustion chamber (by mixing a moderate amount of oxygen into the feedstock gas). The clean gas then leaves the combustion chamber and enters another heat exchanger, while keeping the heat in the heat exchanger. The clean gas is then cooled to close to the feed gas inlet temperature. Finally, the clean gas passes through the diversion hole, lifting valve and clean gas pipeline until the chimney.

Performance feature

※ Energy Saving

※ Heat recovery exceeds 97%

※ VOC removal efficiency up to 99%

※ High air volume & VOC inlet concentration less than 25% LEL

※ Reliable valve design guarantees a VOC removal rate of 99%

※ Multi-tower RTO system can be designed and produced

※ Humanized design, quick installation, and easy maintenance

※ PLC control system

※ Frequency converter reduces power consumption

※ Integrated VPN can be used for remote fault diagnosis and real-time operation

※ Very little NOx is produced

Product superiority

1.RTO dynamic simulation technology

The software can quickly evaluate the impact of design parameters and operating parameters on heat recovery efficiency, gas consumption and other economic effects, which can be used for both the design and use of new equipment and the operation optimization of existing equipment.

2. Remote operation and maintenance control center

Process flow diagram:

Regenerative heat oxidizer is a device for removing volatile organic compounds by combustion.

This type of product is suitable for the purification of high concentration organic waste gas, coating waste gas, odor waste gas, etc.

It is applicable to the frequent change of the composition of the exhaust gas or the components of the exhaust gas that make the catalyst toxic or the activity decline (such as mercury, tin, zinc and other metal vapor and phosphorus, phosphide, arsenic, etc.), which easily make the catalyst lose activity; Halogen and large amounts of water vapor), containing halogen hydrocarbons and other corrosive organic gases.

RTO is generally suitable for the treatment of a variety of organic waste gases with a concentration of 5000~20000mg/m3.

Technical specifications:

specifications and models Temperature ℃ Airflow dealer Nm3/h
AR-RTO3Q-10K 760~950 10000
AR-RTO3Q-15K 15000
AR-RTO3Q-20K 20000
AR-RTO3Q-25K 25000
AR-RTO3Q-30K 30000
AR-RTO3Q-35K 35000
AR-RTO3Q-40K 40000
AR-RTO3Q-50K 50000

Application industry:

It is suitable for waste gas treatment of lithium battery, glass, paint, spraying, chemical, pharmaceutical, printing and other industries.

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Rotary enrichment + RTO combined technology http://www.airepe.com/zhuanlunnongsuortozuhejishu/ Thu, 01 Dec 2022 06:20:31 +0000 http://www.airepe.com/?p=993 The large air volume, low concentration, and room temperature volatile organic mixed waste gas to be treated is acted by the induced draft fan, and firstly passes through the pretreatment filter device to remove the dust particles and impurities in the waste gas, otherwise the direct adsorption will block the micro-shrinkage pores of the zeolite, thus affecting the adsorption effect Even ineffective, after preliminary filtration, "relatively pure organic waste gas" enters the zeolite rotor adsorption device for adsorption and purification treatment. The organic matter is trapped inside by the unique force of the rotor zeolite, and the clean gas is discharged. After a period of adsorption, When the zeolite runner reaches the saturated state, the runner automatically rotates into the cooling and high temperature desorption area. The high-concentration exhaust gas desorbed by the zeolite runner directly enters the regenerative combustion device (RTO) for high-temperature oxidation treatment. After the exhaust gas is oxidized, the high-temperature gas is discharged to exchange heat with the regenerative ceramics, so that the gas entering the RTO is preheated to 650-720 ℃ to reduce fuel consumption, the exhaust gas after heat exchange is directly used for desorption and the heat is insufficient and the oxygen content is low, but it can be directly used for adsorption of exhaust gas to increase temperature and dehumidify;

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Comprehensive process flow:

Application industry:

It is suitable for waste gas treatment of lithium battery, glass, paint, spraying, chemical, pharmaceutical, printing and other industries.

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Scrubber http://www.airepe.com/xidita/ Thu, 01 Dec 2022 06:05:43 +0000 http://www.airepe.com/?p=969 The washing unit is divided into water washing and chemical washing. Water washing can decompose water-soluble components such as ethanol. Chemical washing is also divided into pickling and alkali washing. According to different application occasions, washing has different treatment effects.

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Working principle:

The washing system mainly consists of washing tower, circulation pipeline, dosing pipeline, fog removal, etc. The exhaust gas enters the lower part of the scrubber through the pipeline, goes upstream, contacts with the absorption liquid from the top down, and absorbs the gas in the exhaust gas. The scrubber is provided with a fog removal layer, spray layer, filler layer and liquid storage tank from top to bottom, and the waste gas enters the scrubber from the air inlet below the tower, and passes through the filler layer and the fog removal layer from bottom to top. The spray water circulates from the liquid storage tank to the spray layer through the circulating pump, and the spray lye contacts and absorbs the tail gas from top to bottom, and falls back to the liquid storage tank at the bottom of the tower. Achieve reverse contact, absorption of exhaust gas function.

Performance feature:

Efficient removal of inorganic components from exhaust gases;

It can remove some water-soluble organic substances in the exhaust gas, such as zui, short acids;

The relative humidity of the tail gas reaches 100%, and it is recommended to set a dehumidification device at the back end.

Technological process:

Chemical wash

Wash

Application industry:

It is suitable for waste gas treatment of lithium battery, glass, paint, spraying, chemical, pharmaceutical, printing and other industries.

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Rotor + Catalytic Oxidizer (CO) http://www.airepe.com/zhuanluncuihuayanghuaqico/ Thu, 01 Dec 2022 06:18:08 +0000 http://www.airepe.com/?p=987 CO is an industrial organic waste gas purification device that uses a catalyst to decompose VOCs into water and carbon dioxide, and uses the heat storage capacity of the heat storage body to recycle the heat generated by the oxidation reaction of VOCs. It mainly includes reversing valve, heat storage bed, catalytic bed, heater and other equipment

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Operating principle:

Catalytic combustion is a typical gas-solid phase catalytic reaction, the essence of which is reactive oxygen species participating in deep oxidation. In the catalytic combustion process, the function of the catalyst is to reduce the activation energy of the reaction and enrich the reactant molecules on the catalyst surface to increase the reaction rate. With the help of the catalyst, the organic waste gas can be flameless combustion at a lower ignition temperature, and be oxidized and decomposed into CO2 and H2O, while releasing a lot of heat.

When the organic waste gas is burned on the metal oxide catalyst, the oxidation reaction of CnHm is realized through the surface REDOX cycle.

The reaction mechanism is as follows:

Ri + oxidation state catalyst filename Reduced state catalyst + Product (1)

O2 + reduced catalyst filename Oxidized catalyst (2)

Among them, Ri is the i species of CnHm. Equation of corresponding reaction kinetics model

It can be expressed as:

Working process:

CO performance characteristics:

※ Safe and reliable;

※ High heat recovery efficiency;

※ High processing performance: Imported precious metal catalyst, with excellent low temperature activity, high processing performance;

※ Energy saving: The effective use of the heat generated in the oxidation combustion process of VOC can not only decompose VOC gas, but also achieve energy saving effect;

※ Long service life of the equipment: the operating temperature of the regenerative catalytic oxidation combustion method is generally 200~400℃, which can effectively extend the service life of the equipment and make operation and management easier;

※ The use of pre-treatment agents and pre-treatment technology can effectively prevent and control various catalytic poisons.

Compared with the traditional treatment method, the advantages of catalytic oxidation combustion method are:

High processing performance: Provide a variety of imported precious metal catalysts with excellent low temperature activity, high processing performance;

Energy saving effect: The effective use of the heat generated in the oxidation combustion process of VOC can not only decompose VOC gas, but also achieve energy saving effect;

Long equipment life: the operating temperature of catalytic oxidation combustion method is generally 200~400 ° C, which can effectively extend the service life of equipment and make operation and management easier. Due to low temperature combustion, NOx easily produced in the general flame combustion process will not occur, and the generation of CO2 can also be controlled to a very low level, effectively reducing the burden of equipment;

Catalyst poisoning countermeasure: catalyst poisoning is the biggest harm of catalyst, the use of pre-treatment agent and pre-treatment technology can effectively prevent and control all kinds of catalyst poisoning;

Wide range of applications: not only to deal with VOC treatment, for ammonia decomposition, methane and N2O greenhouse gas decomposition, nuclear power plant hydrogen treatment, waste gas purification, the application of catalysts can be a good deal of treatment;

 

In summary, the catalytic oxidation combustion method has the following technical advantages:

VOC processing performance is high

Cryogenic combustion

Long equipment life

Low fuel consumption

Less CO2 production than direct combustion method

No secondary processing is required

 

Effective processing efficiency:

Key industry performance table:

Sequence number Industry Quantity
1 Hectographic printing 800set
2 Intaglio printing 300set
3 Coating, coating dry 300set
4 Metal printing(Can making) 100set
5 Enamelled wire drying oven 1500set
6 Rests 1000set

Main application areas:

Suitable for petrochemical/chemical industry, coating/coating drying, rubber plate/gravure printing, metal printing, furnace purification, food industry, semiconductor, enamelized wire drying brush and other industries of waste gas treatment.

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Activated carbon adsorption and desorption technology http://www.airepe.com/huoxingtanxifutuofujishu/ Thu, 01 Dec 2022 06:00:27 +0000 http://www.airepe.com/?p=963 Activated carbon adsorber, activated carbon has the characteristics of large specific surface area, small through-hole resistance, developed micropores, high adsorption capacity, and long service life. The exhaust gas is in contact with the porous activated carbon with a large surface, and the pollutants in the exhaust gas are adsorbed and decomposed, thus playing a purification role

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Operating principle:

Activated carbon is a kind of adsorbent made of carbon-containing materials with black appearance, developed internal pore structure, large specific surface area, strong adsorption capacity, non-polar surface, hydrophobic and organophilic. The porosity of activated carbon has a strong adsorption capacity for some harmful gases (mainly organic matter). It is often used to adsorb aliphatic CnHm, aromatic hydrocarbon, ketones, alcohols, ethers, aldehydes, organic acids, kerosene, gasoline, phosgene, esters, odor, etc. When the exhaust gas passes through the activated carbon layer, it is adsorbed on the activated carbon by the unbalanced molecular attraction or chemical bond existing on the carbon surface, so as to achieve the exhaust gas purification.

The filtered organic waste gas enters the high specific surface area activated carbon adsorption and concentration device, and the air flow passes through the activated carbon hole, where the organic solvent molecules are adsorbed in the activated carbon microhole under the action of adsorption force to realize the separation of solvent molecules and air, and the clean air after adsorption and purification is discharged into the atmosphere through the exhaust cylinder. After adsorption of activated carbon to a certain extent, its adsorption performance will be reduced, in this state is called adsorption saturation. The activated carbon needs to be regenerated after adsorption saturation to restore its adsorption function. This regeneration process is called desorption regeneration process.

Function:

※ PLC automatic control;

※ Adopt multiple safety facilities;

※ Stable operation, easy maintenance, low operating costs;

Airflow simulation diagram:

The gas flow simulation is carried out in the activated carbon box to ensure that the exhaust gas is distributed through the activated carbon layer to achieve the best adsorption effect.

Activated carbon adsorption equipment should consider the following factors:

1. The concentration of organic waste gas entering the purification device should be less than 25% of the lower limit of its explosion limit;

2. An emergency device for direct exhaust of organic waste gas should be set up before the purification device. When the purification device fails, it should be able to open the direct exhaust device immediately so that the organic waste gas can be directly drained to prevent the accumulation of organic gas.

3. The top of the activated carbon adsorber should be equipped with a pressure gauge and a safety release device (safety valve or bursting disc device);

4. Before the adsorption and purification device, a flame arrester should be set;

5. The activated carbon adsorption device should have good grounding measures to prevent the accumulation of static electricity;

6. The differential pressure meter should be set on the air pipe of the gas inlet and outlet of the activated carbon adsorber to determine the airflow resistance (pressure drop) through the adsorber, so as to determine whether the activated carbon needs to be replaced;

7. Activated carbon adsorption device and surrounding should be set up a certain no-fire area.

Technical specifications:

Sequence number Wind volume

m³/h

Specification and dimension

mm

Carbon loading volume

Passing wind speed

m/s

1 2000 L1400*H1000*W1500 0.5 0.35
2 4000 L1900*H1200*W1500 1 0.35
3 8000 L2450*H1500*W1700 2 0.45
4 12000 L2650*H2000*W1850 3 0.45
5 18000 L2850*H2400*W2100 4.5 0.45
6 25000 L3200*H2400*W2600 6.2 0.45
7 33000 L3600*H2600*W2600 8.2 0.45
8 42000 L4000*H2880*W2600 10.5 0.45
9 50000 L4450*H3000*W2800 12.5 0.45
10 59000 L5200*H3000*W2800 14.5 0.45
11 68000 L5850*H3000*W3000 19 0.45
12 76000 L6000*H3000*W3200 21.2 0.50

Application industry:

It is widely used in various fields of the national economy such as food, medicine, environmental protection, energy, chemical industry, and national defense, and plays an indispensable role.

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Zeolite Rotor Concentration Technology http://www.airepe.com/feishizhuanlunnongsuo/ Thu, 01 Dec 2022 05:51:46 +0000 http://www.airepe.com/?p=957 The runner is usually divided into three parts, a large fan-shaped part and two small fan-shaped parts. The large fan-shaped part is for adsorbing organic matter, and the two small fan-shaped parts are cooling area and high-temperature desorption area respectively. The runner rotates at a certain speed. The zeolite is automatically transferred to the desorption area for desorption regeneration, forming simultaneous operation of adsorption concentration and desorption regeneration, and continuous production.

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Schematic diagram:

Zeolite runner adsorption concentration device uses high-quality products, the adsorption material is zeolite, zeolite structure is similar to crystal, the molecules like a shelf seems to be connected together, the formation of a lot of cavities in the middle, which forms a lot of micropores, has a strong adsorption capacity, the adsorption capacity of adsorbent molecules far more than other types of adsorbents.

Shape (shell)

Runner construction

The zeolite concentrator itself is only an adsorption concentrator for the treatment of organic waste gas, so it can not be used alone. The back end often needs to add a destruction type processing device, such as RTO, CO, etc.

Application industry:

It is suitable for waste gas treatment of lithium battery, glass, paint, spraying, chemical, pharmaceutical, printing and other industries.

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