PP Biological Deodorization Tower and Air Duct

In the production processes of chemical synthesis and biopharmaceutical manufacturing, large volumes of waste gas containing acidic, alkaline, and malodorous substances are inevitably generated. This type of waste gas not only corrodes production equipment, pollutes the surrounding environment, and endangers the health of on-site operators, but also fails to meet China’s national environmental emission regulations. To achieve environmental ventilation, waste gas purification, and standard-compliant discharge, our PP Biological Deodorization Tower and Air Duct leverage the excellent anti-corrosion and acid-resistant properties of polypropylene (PP), integrated with core technologies including biological deodorization and acid-base neutralization, to build a highly efficient, stable, and eco-friendly waste gas treatment system. This solution is widely used in chemical synthesis, biopharmaceutical R&D and production scenarios, effectively solving the core pain points of industrial waste gas treatment in the industry.

Industry Waste Gas Treatment Pain Points & Strict Compliance Requirements

Chemical and biopharmaceutical production generates waste gas with complex components, strong corrosiveness, and toxic malodorous pollutants, including hydrochloric acid, sulfuric acid mist, sodium hydroxide, ammonia, and hydrogen sulfide. Traditional metal-based treatment equipment is prone to rust, corrosion damage, and short service life in high-corrosion, high-humidity waste gas environments, leading to frequent equipment replacement, high maintenance costs, and potential emission non-compliance risks.

With the continuous tightening of national environmental protection policies in China, standard discharge of waste gas has become a prerequisite for the survival and development of chemical and biopharmaceutical enterprises. The industry has an urgent demand for a corrosion-resistant, efficient, stable, and fully compliant waste gas treatment solution that can achieve full-process control from waste gas collection to purification discharge.

Core Material & System Framework

Our PP Biological Deodorization Tower and Air Duct use polypropylene (PP) as the core base material, which has excellent chemical stability. Except for strong oxidizing acids, it has superior tolerance to various acids, alkalis, salts, and organic solvents. Meanwhile, PP material features light weight, easy processing, and long service life, which perfectly adapts to the high-corrosion and high-humidity waste gas environment in the chemical and biopharmaceutical industries.

The complete waste gas treatment system consists of three core modules, forming a full-process governance solution from waste gas conveying to purification and discharge:

PP Air Duct (the closed conveying vein of the system)

PP Spray Tower & PP Scrubber Tower (collectively referred to as PP Tower, the core equipment for acid-base neutralization and preliminary purification)

Biological Deodorization System (the core unit for thorough malodorous pollutant degradation and final purification)

Core Components, Technical Principles & Compliance Advantages

PP Air Duct: Closed, Low-Consumption Waste Gas Conveying Carrier

PP Air Duct is the "conveying vein" of the entire waste gas treatment system. Its core function is to efficiently convey the waste gas generated by chemical reaction kettles, biopharmaceutical fermentation tanks, batching tanks and other equipment to the subsequent purification equipment through a closed pipeline, realizing no leakage and no diffusion throughout the process, and avoiding the accumulation of waste gas in the workshop. Compared with traditional metal air ducts, PP Air Duct has outstanding anti-corrosion and acid-resistant advantages, which can effectively resist the erosion of corrosive media such as hydrochloric acid, sulfuric acid, and sodium hydroxide commonly found in chemical and biopharmaceutical waste gas, and is not prone to rust and damage. At the same time, its smooth inner wall brings small wind resistance, which can reduce fan energy consumption and improve waste gas conveying efficiency.

In strict accordance with the requirements of GB 51401-2019 Design Standard for Waste Gas Treatment Engineering in Electronic Industry, the anti-corrosion performance of the air duct material is fully compatible with the corrosive media it contacts. The PP Air Duct can be flexibly designed according to the workshop layout, adapting to production workshops of different scales, and realizing precise docking for both straight conveying and curve turning, ensuring the continuity and stability of waste gas conveying.

PP Tower (PP Spray Tower & PP Scrubber Tower): Acid-Base Neutralization & Preliminary Waste Gas Purification

PP Spray Tower and PP Scrubber Tower (core components of PP Tower) are the core equipment to realize acid-base neutralization and preliminary waste gas purification. The two work synergistically to effectively remove acidic and alkaline pollutants in the waste gas, laying a solid foundation for the subsequent biological deodorization process.

The PP Spray Tower adopts a spray absorption process: alkaline absorption liquid (such as sodium hydroxide solution) is atomized through high-pressure nozzles to form fine droplets, which fully contact and mix with the acidic waste gas passing through the tower body, and undergo an acid-base neutralization reaction. It converts acidic substances in the waste gas (such as hydrogen chloride, sulfuric acid mist, etc.) into harmless salts to achieve preliminary purification.

The PP Scrubber Tower is mainly used to treat dust-containing, mist-containing and high-concentration acid-base waste gas: it is equipped with multi-layer packing layers inside. When the waste gas passes through the packing layer, it forms sufficient gas-liquid contact with the absorption liquid sprayed from top to bottom, which can not only complete acid-base neutralization, but also intercept fine particles in the waste gas, further improving the waste gas purification effect.

Both pieces of equipment are made of PP material, giving full play to the anti-corrosion, acid-resistant, waterproof and moisture-proof properties of PP material, which can operate stably in a highly corrosive environment for a long time. The equipment has a simple structure, convenient operation, low operating cost, and no complicated maintenance. In strict accordance with industry specifications, the design of the PP Spray Tower and PP Scrubber Tower follows the requirements that the section wind speed of the packing washing waste gas treatment equipment should be less than 2.5m/s and the packing thickness should not be less than 1.2m, ensuring full contact between the spray liquid and the waste gas and improving purification efficiency. At the same time, the equipment is equipped with a circulating water tank and spray system, and the absorption liquid can be recycled to reduce water waste, which is in line with the concept of environmental protection and energy saving, especially suitable for scenarios with large acid-base waste gas emissions in the chemical and biopharmaceutical industries, such as chemical synthesis workshops and biopharmaceutical intermediate production workshops.

Biological Deodorization System: Thorough Odor Treatment with Zero Secondary Pollution

Biological deodorization is the key link of the entire waste gas treatment system, which is mainly used to solve the problem of odor treatment in the chemical and biopharmaceutical industries. Organic waste gas from chemical production, ammonia, hydrogen sulfide and other malodorous substances generated during biopharmaceutical fermentation are not only pungent, but also have certain toxicity, which is difficult to be completely removed by traditional physical and chemical treatment methods.

The biological deodorization technology decomposes malodorous substances into harmless carbon dioxide, water and inorganic salts through the metabolism of microorganisms, realizing the thorough purification of malodorous gas without secondary pollution, which meets the needs of green production in the chemical and biopharmaceutical industries. The system usually operates in coordination with PP Spray Tower and PP Scrubber Tower: the waste gas after acid-base neutralization and preliminary purification first enters the biological deodorization device, the malodorous substances in the waste gas are adsorbed by the microbial membrane in the device, and the microorganisms take the malodorous substances as nutrient sources and decompose them through metabolic activities, so as to achieve the purpose of odor treatment.

The core advantages of the system are environmental protection, high efficiency, no secondary pollution, stable operation, and adaptability to the treatment needs of malodorous gases with different concentrations, especially suitable for areas with concentrated emission of malodorous gases such as fermentation workshops and sewage treatment stations in the biopharmaceutical industry. In accordance with the requirements of GB 37823-2019 Emission Standard of Air Pollutants for Pharmaceutical Industry, the biological deodorization system can effectively reduce the emission concentration of malodorous substances in the waste gas, ensuring that the waste gas emission meets the national and local environmental protection standards.

Full-Closed Loop Operation Process

The PP Air Duct, PP Tower, and Biological Deodorization Equipment form a complete closed-loop operation process, realizing full-process environmental ventilation and waste gas purification:

1.Closed Conveying: The waste gas generated in the chemical and biopharmaceutical production process is transported in a closed manner through the PP Air Duct, ensuring that the waste gas is safely and stably delivered to the treatment equipment without leakage;

2.Preliminary Purification: The waste gas first enters the PP Spray Tower and PP Scrubber Tower, removes acidic and alkaline pollutants through acid-base neutralization reaction, and completes preliminary waste gas purification;

3.Deep Purification & Odor Treatment: The preliminarily purified waste gas enters the biological deodorization device, completes odor treatment, and completely removes malodorous substances;

4.Standard-Compliant Discharge: Finally, the purified waste gas is discharged through the standard discharge pipeline, and the entire process ensures that the discharged waste gas fully meets the national environmental protection standards.

Industry Application Advantages & Customization Capabilities

In the chemical and biopharmaceutical industry, the application of PP series waste gas treatment equipment has significant advantages and necessity:

Superior Anti-Corrosion Performance: Compared with traditional metal equipment, PP series equipment has excellent anti-corrosion and acid-resistant properties, can operate stably for a long time in high-corrosion waste gas environment, and greatly reduces the cost of equipment replacement and maintenance;

Integrated Full-Process Governance: The system integrates multiple functions such as waste gas conveying, acid-base neutralization, biological deodorization, and waste gas purification, which can target the core pain points of industry waste gas treatment, and achieve the dual goals of odor control and standard discharge, helping enterprises meet environmental compliance requirements;

Flexible Customization Capability: The equipment can be individually designed and customized according to the specific needs of chemical and biopharmaceutical enterprises, such as production scale, waste gas emission, waste gas composition, etc. It can achieve efficient purification for both low-concentration waste gas treatment in small R&D laboratories and high-concentration waste gas treatment in large production workshops;

Energy Saving & Environmental Protection: The equipment has low noise and low energy consumption during operation, which is in line with the industry development trend of green production and energy saving and consumption reduction. It can not only help enterprises achieve environmental compliance, but also improve the quality of the production environment, protect the health of operators, and establish a good image of green environmental protection for enterprises.

Compliance Value & Sustainable Development Support

With the continuous upgrading of national environmental protection supervision, the waste gas treatment requirements of the chemical and biopharmaceutical industries are becoming increasingly strict. Our PP Biological Deodorization Tower & Air Duct, with its advantages of anti-corrosion and acid resistance, high-efficiency purification, stability and reliability, combined with core technologies such as waste gas conveying, biological deodorization, and acid-base neutralization, provide the industry with a scientific, efficient and environmentally friendly waste gas treatment solution.

This solution effectively promotes the green transformation and high-quality development of the chemical and biopharmaceutical industries, and realizes the unification of economic benefits, environmental benefits and social benefits for enterprises.