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High exhaust pollution is generated in solid, liquid and/or gaseous waste incineration in the chemical production process. Incineration gases usually contain a very high concentration of inorganic and gaseous substances.
Typical contaminants include basic elements, such as CL2 Br2, J2, and hydride (HCL, HBr and HJ) or SO2.
In addition, dust and suspended particles are often discharged. High-temperature, highly corrosive and wear pollution containing a variety of ingredients have strict requirements in waste purification.
Due to the high concentration of pollutants, a multi-stage wet exhaust gas purification system is needed to maintain a low emission level. In most cases, these devices include a particle separation process, a quenching stage, one or several wet scrubbers and suspended particle separation stage.
Our team provides high-tech and economical solutions to handle the above situations.
From application assessment to operation and implementation, we are the sole supplier of the complicated exhaust gas purification systems.

 

Basic steps of a typical exhaust gas purification system

Coordination State of Emission Reduction
Quenching Stage
Temperature of incinerated exhaust gas is up to 1300° C and the next is the quenching stage. In direct heat exchange, through evaporation and circulating water, the waste gas is cooled to the saturation temperature. Especially because of these two reasons, this step requires a very complex process.
The cooling of hot exhaust gas must be ensured in any cases and even in case of power outage to prevent damage to downstream equipment. In addition, appropriate material and a good transition area planning and design layout should be selected carefully in the transition area of water distribution between dry hot exhaust and quenching. It is necessary to prevent the contraflow of sediments that may lead to salt, so as to ensure that the cooling liquid can wet the equipment surface uniformly. Other designs of quenching include jet mist spray, nozzles, pipes or sprayer nozzle shape.
It's better to use jet mist spray quenchers made of antiseptic FRP and SiSiC wearable nozzles. Because of the special distribution of cooling water, these FRP quenchers can be applied to gases with a temperature up to 1300 ° C.
Jet mist spray quencher is not sensitive to the load variation of the mass transfer gases and has very good dedusting effects because of its relatively high speed.
In the subsequent mass transfer stage, quenching cooling stage leads to temperature reduction, and inexpensive synthetic and composite materials can be used.
Absorption of pollutants
Absorption of pollutants after quenching, saturated air flow of water vapor into the actual absorption stage. The pollutant removal is conducted in the packed column.
Original gas flow flows upward from the bottom in the tower. Purification solution is countercurrent to the direction of gas flow. If necessary, chemicals can be added to enhance the absorption of pollutants.
The key of the effective operation of the packing tower lies in the tower internals produced by our factory. In addition to modern distributor design, super saddle rings, support plates and collectors can also be used. The open structure of super saddle rings makes them have a very strong sensitivity to pollutants. Other advantages of super saddle rings are light weight, high durability and mechanical stability. Extremely low pressure loss can save energy source.

 
Sample of Jet Mist Spray Quencher                                                                     

Separation of Droplets and Suspended Particles
In order to reduce the entrainment of droplets and fogdrop, purification gases are led to suspended particle separator. On the fine net configuration or sheets, liquid particles are interflowed or separated.
Our system can be fully rinsed to prevent scale.
A new development in the field of suspended particle separation system is Carola (corona aerosol) (corona suspended particle) separator. This is the R&D and patent of Karlsruhe Research Center. With this system, even the minimum particle less than 100 nanometers, the separation rate can reach as high as 95%. This is the result of ionization.
As an application innovation enterprise, our team has obtained the production and sales authority of this new factory technology.

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