LuoyangWohong PetrochemicalThe three-inch organic gas vapor membrane produced by Equipment Co., Ltd. is a standard roll-type membrane element in the VOCs membrane separation and recovery system of Wohong, which is specially designed for the solvent recovery scene of industrial tail gas with small and medium air volume. Relying on the company's years of research and development and accumulation of organic vapor membranes, the membrane element adopts a customized modified polymer separation layer, and relies on the principle of dissolution and diffusion to realize the selective separation of organic solvent vapor from carrier gases such as air and nitrogen. It is widely suitable for tail gas resource treatment projects in pharmaceutical and chemical industries, fine chemicals, paint production, small and medium-sized oil and gas recovery and other industries.

Wohong's three-inch organic gas vapor membrane adopts a three-inch standardized outer diameter structure. The membrane element is small in size and can be flexibly combined in series and parallel. It is convenient to adjust the number of membrane modules according to the changes of on-site exhaust air volume and components. The modular design is suitable for skid-mounted complete recovery units. It also supports the upgrading and transformation of the original exhaust treatment equipment. The on-site pipeline changes are small and the project construction period is shortened. The mixed tail gas containing solvent enters the feed end of the membrane element, driven by the pressure difference on both sides of the membrane, the organic vapor preferentially permeates the functional membrane layer and is enriched on the permeation side to form high-concentration steam, which is sent to the condensation unit for liquefaction and recovery; the non-condensable gas is difficult to penetrate the membrane body and is discharged from the retentate side to stably control the tail gas emission index.

In view of the complex working conditions of industrial tail gas, Wo Hong optimizes the membrane material formula to improve the solvent erosion resistance of the membrane, which can withstand long-term immersion in various solvent vapors such as ethyl acetate, acetone, toluene, dichloromethane, etc. Under the production environment of tail gas concentration fluctuation and temperature change, the stable permeation flux and separation selectivity are continuously maintained, and the problem of swelling failure is not easy to occur. The three-inch membrane element can be combined with the Wohong mature condensation process to form a condensation membrane coupling process, first through condensation to recover most of the high concentration solvent, the residual low concentration of tail gas into the three-inch membrane module for further enrichment treatment, further enhance the overall solvent recovery rate, reduce VOCs outward emissions.

The whole membrane separation unit operates at room temperature and low pressure, without rotating parts, with low operating noise and no need for continuous dosing.activated charcoal, absorbent chemicals and other consumables, lower operating and maintenance costs. The system is convenient to start and stop, and can start and stop synchronously with the intermittent production rhythm of the production line, adapting to the intermittent exhaust emission conditions of medicine and fine chemical industry. All three-inch organic gas vapor films in Wo Hong have undergone strict air tightness and performance tests before leaving the factory to ensure the uniform quality of single film pieces. The membrane element is easy to disassemble and assemble. In the later operation and maintenance process, the membrane core with degraded performance can be replaced separately, without the need to dismantle the whole membrane assembly, thus greatly reducing the operation and maintenance investment.

In the landing phase of the project, the technical team of Luoyang wohong petrochemical equipment co., ltd. will calculate the exhaust gas parameters on the customer's site, and match the pre-filtration pretreatment device to remove liquid droplets and dust impurities in the exhaust gas, prevent the membrane surface from being covered by pollutants, and effectively prolong the service life of the membrane element. The recovery system using Wohong three-inch organic gas vapor film belongs to the resource treatment scheme, and the recovered organic solvent can be reused in the production process after simple treatment, which not only meets the requirements of environmental protection control, but also can recover materials to create economic benefits. Wo Hong can provide integrated supply of membrane elements, membrane modules and a complete set of VOCs recovery devices, supporting process design, on-site technical guidance and other full-chain services, providing reliable membrane separation solutions for small and medium-sized air volume waste gas recovery projects.