Recycling technology of organic waste gas with low VOCs concentration
In the current era when environmental protection is increasing and people are paying more attention, VOCs waste gas has begun to receive more and more attention from everyone. Therefore, VOCS recycling has received more and more attention from companies. In view of the current high concentration of VOCs waste gas treatment methods , There are different treatment methods on the market, and the advantages of recycling treatment technology with large emissions and low VOC concentration. 1. High-concentration VOC recovery technology in the gas. During the loading process of light oil products and the large and small breathing operations in the tank area, high-concentration oil and gas are discharged. The concentration of VOC can reach more than 1000g/m3. The hydrocarbon concentration is in the hundreds of grams per cubic meter. The emission limit requires that the concentration of non-methane total hydrocarbons is ≤20g/m3 and 25g/m3, and the mechanical refrigeration low-temperature condensation → filtration and capture treatment method is adopted. The first-level heat exchange adopts cold energy recycling technology; the two-stage mechanical refrigeration method is used to establish a low temperature environment not higher than -95℃ to condense and recover the hydrocarbons in the oil and gas; the filter trap technology is used to perform the condensation and recovery of the gas Filtering and trapping treatment improves the recovery rate of oil and gas. 2. Low-concentration VOC recovery technology in the gas. The VOC concentration is low, but the total amount of VOC emissions from various process waste gases with large gas emissions is considerable. For example, the VOC emission concentration is 300mg/m3, the gas emission is 40000m3/h, the VOC emission per hour is about 12kg, and the annual production device running time is 8000 hours, and the VOC emission is about 96t. This is the two production emissions of latex gloves. The actual situation of D60 and D70 solvent oil does not include almost the same amount of DOP mist emission. The VOC emission concentration limit is 120mg/m3 in national standards and petrochemical industry standards, and local standards in different places are 100mg/m3 and 80mg/m3. Exhaust gas with low VOC concentration but large gas emissions has two situations. One is that the emission concentration exceeds the standard and the other is that the emission concentration meets the standard. Excessive exhaust gas should be treated, and for the exhaust gas that meets the standard, due to VOC The emissions are large and have recycling value, which can significantly reduce production costs. Adopting dual adsorbers to alternately adsorb and desorb, adsorb and concentrate VOCs, and discharge gas up to standard. For characteristic pollutants with low emission limit requirements, the discharged gas can be processed by oxidation. Vacuum desorption is adopted, and the desorbed rich gas is condensed and recovered at low temperature, and the unrecovered VOC is sent to the adsorber for adsorption treatment.
Personal protective equipment must meet specific performance requirements before it can be used in demanding workplace environments. ISO, EN, and ASTM standards provide important test methods and performance requirements for different PPE categories. However, the applicable standard depends on the product, intended application, target market, and specific protection requirements.
This guide explains the role of ISO, EN, and ASTM standards in PPE testing and introduces common requirements for safety footwear, protective gloves, protective clothing, masks, and safety helmets. It also explains how laboratories can select suitable PPE testing equipment according to the applicable test method.
The air permeability tester is a high-precision testing instrument designed to evaluate the breathability of PPE materials, textile fabrics, non-woven fabrics, woven fabrics, and industrial filter media. It plays a critical role in quality control, product development, and laboratory research across multiple industries including PPE, textiles, automotive interiors, and filtration systems.
Modern instruments such as the GT-C27 Air Permeability Tester are developed with advanced sensor systems, automated control logic, and multi-standard compatibility to ensure reliable and repeatable results. Complying with global standards such as ISO 9237, ASTM D737, DIN 53887, and GB/T 5453, it guarantees internationally recognized testing performance.
With high automation, accurate pressure sensing, and flexible unit conversion systems, air permeability testing equipment significantly improves testing efficiency while reducing human error. It is widely used in PPE manufacturing, textile engineering, non-woven product development, and industrial filtration quality inspection.
The Heat Contact Machine GT-C101 is a specialized testing instrument designed for evaluating the heat resistance and thermal protective performance of gloves, protective clothing, and other heat-resistant materials used in high-temperature environments. In industries such as smelting, casting, welding, and glass manufacturing, workers are frequently exposed to intense heat, making accurate testing of contact heat resistance essential for ensuring safety and compliance.
GT-C101 simulates real working conditions by measuring heat transfer delay and thermal transmission under instant contact with high-temperature surfaces. Fully compliant with EN 407, EN 702, and ISO 12127-1 standards, this machine provides precise, repeatable data for manufacturers, laboratories, and research institutions. With high-temperature capability up to 500°C, advanced calorimetry, digital monitoring, and adjustable contact speed, the Heat Contact Machine GT-C101 is an indispensable tool for developing and certifying next-generation PPE and heat-insulation materials.
Choosing the right abrasion testing equipment is essential for obtaining accurate and repeatable wear resistance results. DIN Abrasion Tester and Taber Abrasion Tester are two widely used abrasion testing machines, but they are designed for different material types and testing purposes.
This article provides a detailed comparison between DIN Abrasion Tester and Taber Abraser, covering their working principles, specimen requirements, industry applications, standard compliance, technical characteristics, operation features and practical advantages. DIN Abrasion Tester is mainly designed for rubber, elastic materials, tires, conveyor belts and footwear soles, while Taber Abrasion Tester is suitable for flat materials such as coatings, textiles, plastics, leather, metals and decorative surfaces.
By understanding the differences between these two abrasion testing methods, laboratories can select the most suitable abrasion tester based on sample geometry, testing standards and production quality control requirements.
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