Skid-mounted complete equipment for condensing membrane separation

Skid-mounted complete equipment for condensing membrane separation

Condensation membrane separation skid-mounted complete equipment is a modular VOCs that integrates compression condensation and membrane separation technology.waste gas treatmentDevice. The equipment adopts a skid-mounted design. The compressor, condenser, membrane module, control system and pipeline valve are all integrated on a steel base. The internal assembly and performance test are completed before leaving the factory. The site only needs to be connected to the power supply and The gas circuit can be put into operation. The installation period is short, the floor area is small, and the overall migration can be carried out as required.

Process flow

The equipment adopts the combined process of "compression condensation membrane separation. The exhaust gas is first pressurized by the compressor to increase the partial pressure of organic matter and create conditions for subsequent condensation. The pressurized gas enters the condensing unit, and most of the organic matter is changed from gaseous to liquid through multi-stage cooling. The liquefied solvent is separated by the collection tank and can be directly recycled for production. The core of the condensing unit is the temperature classification control, the high boiling point component can be liquefied at a higher temperature, the low boiling point component needs a lower temperature, through the non-uniform distribution of temperature classification, can effectively control the refrigeration energy consumption under the premise of meeting the recovery rate.

The condensed exhaust gas still contains a small amount of organic matter that has not been liquefied and enters the membrane separation unit.gas separation membraneTaking advantage of the difference in permeation rate between organic molecules and air molecules in the membrane material-organic substances preferentially permeate through the membrane layer to form concentrated gas, which is sent back to the compressor inlet and mixed with fresh waste gas before entering the condensation process again. Air is trapped and discharged up to standard. By adjusting the pressure difference and membrane area on both sides of the membrane module, the concentration ratio can be controlled in a reasonable range to ensure that the system achieves a balance between recovery efficiency and energy consumption. The entire system forms a closed-loop cycle.

For particularly stringent emission standards, the membrane separation unit can be added after the adsorption unit as the last check to ensure that the concentration of tail gas to meet environmental requirements.

Technical Features

The equipment is driven by electricity, does not consume natural gas, and is not in operation.activated charcoalWait for consumables to be replaced; no hazardous waste is generated. The service life of the membrane module is long, and the daily maintenance is mainly to clean the heat exchanger and check the pressure difference on both sides of the membrane module. The process is from room temperature to low temperature operation, does not involve combustion, no open flame, and has good applicability in explosion-proof places such as chemical, pharmaceutical, and storage tank areas.

The equipment adopts PLC automatic control, automatic start and stop according to the situation of exhaust gas, no need for special personnel on duty. The control system has the function of real-time monitoring of temperature, pressure, oxygen content and other parameters, and automatically alarm and shut down when abnormal.

Scope of application

The equipment is suitable for VOCs waste gas with medium and high concentration (above 1000mg/m³) and solvent with recovery value. Common recyclable solvents include ketones, esters, hydrocarbons, halogenated hydrocarbons, alcohols, and ethers. Applicable industries include chemical, pharmaceutical, printing and packaging, lithium battery manufacturing, oil and gas storage and transportation, gas station three oil and gas recovery, loading and unloading platform, storage tank area, etc.

For the waste gas with low concentration or no recovery value of the solvent, the economy of the process is not obvious, and it is recommended to consider other technical routes. Before selection, the exhaust gas working condition test shall be completed to obtain accurate basic parameters such as concentration, component and air volume, and the condensation temperature series and membrane module specifications shall be matched according to the test results to ensure that the parameters of each unit are reasonably connected.

Key points of project implementation

Before the installation of the equipment, it should be confirmed that the site has power supply and necessary pretreatment conditions, such as filtration, dehumidification, etc., to ensure the long-term stable operation of the membrane module. For corrosive media such as chlorine-containing waste gas, corrosion-resistant materials shall be used for equipment and pipeline materials in contact with the waste gas. The daily maintenance of the equipment is mainly to clean the heat exchanger and check the pressure difference of the membrane module, and the membrane module does not need to be replaced frequently.

LuoyangWohong PetrochemicalEquipment Co., Ltd. focuses on this field and can provide design and manufacturing services for skid-mounted condensing membrane separation equipment according to customer working condition parameters. The products cover small units ranging from a few cubic meters per hour to large systems ranging from thousands of cubic meters per hour. It is recommended to test the working conditions before selection to ensure that the equipment configuration matches the actual requirements.