Application of condensation and adsorption combined vapor recovery technology in oil depots 2

(1) Regarding the adsorption part, in the vapor recovery process, its principle is as follows. When the adsorption tank is used, part of the vapor from the condensing device will be adsorbed. For hydrocarbon substances, it can be adsorbed in a short time and the gas in it can be quickly discharged, including nitrogen, oxygen, etc. If the adsorption tank is in use and the adsorbed vapor have reached saturation, then during this process, the switching of the adsorption tank will be automatically completed, the vapor will be processed efficiently, and the vapor in the adsorption tank will be recovered. During the specific adsorption period, if the volume has exceeded the established range, then the desorption process and the adsorption process can be switched automatically. In the desorption link, the vacuum desorption work must be completed smoothly first, so that the high-concentration vapor desorption efficiency and effect can be optimized. After completing this work, the absorption conversion must be completed in the vapor separation box. It should be noted that during the absorption process of vapor, the corresponding operations should be carried out strictly in accordance with the process to ensure the standardization of the absorption process and enable the recovery effect to reach the expected result. In addition, various process parameters should be selected and set reasonably based on actual conditions during the selection process to ensure that temperature and humidity can be controlled within a reasonable range.

(2) The working principle of the condensation part is mainly as follows: If the vapor are in a closed gas collection pipeline, during the condensation period, they will first enter the precooler to successfully complete the precooling work and remove a large amount of water in the vapor. For the vapor that have not condensed, it is necessary to continue precooling in the precooler to allow the temperature of the vapor to continue to drop. When the temperature drops to a certain value, the vapor are separated from the bottom of the precooler and appear in the form of condensate, and then discharged in the oil-water separation box. If the connection speed of the vapor is slow and cannot meet the expected standard, it can continue to cool in the condenser. If the temperature continues to drop and exceeds the limit value, the condensate will be discharged in the oil-water separation tank. During the cooling period, if there is a situation where the gas is not condensed, the vapor need to be recovered in the collection pipeline to ensure that the heat exchange efficiency can be improved. In the heat exchange stage, it can be completed with the assistance of a heat exchanger, and the cold capacity can be quickly recovered at the same time, so that it can be used scientifically. If the gas does not condense, the temperature cannot reach the expected level, and even rises, it is necessary to use an adsorption device to handle the vapor reasonably and in a standardized manner to ensure that the problem can be effectively solved. During the vapor recovery process, various parameters should be set reasonably based on the actual situation to ensure that non-methane total hydrocarbons can be removed at the fastest speed. During the vapor recovery stage, if the condensation method is used for recovery, the emission standard needs to be based on the national regulations, which is less than or equal to 25 mm. At the same time, the vapor should be deep cooled and the temperature should be controlled at -100 ℃. In order to speed up the condensation effect, the relevant personnel should also use multi-stage machinery to achieve the purpose of rapid temperature reduction. However, in this process, the energy consumption required is relatively large, which cannot meet the economic and environmental requirements of vapor recovery.

(3) Principle of combined application of condensation and adsorption. In the current market development process, in order to improve the efficiency and quality of vapor recovery, the condensation method and the absorption method are generally used in combination. In the application process of this technology, vapor recovery is more efficient and feasible, and the deep cold temperature can meet the relevant requirements, usually at -70~-80 ℃. In addition, under the combined application of condensation and adsorption, the vapor can be quickly cooled by condensation to keep it within a controllable range. At this time, the vapor in the gas are not too high in concentration, and there are not many hydrocarbons with longer molecular chains, so the purity of the analysis can be improved. During the analysis process, it is not necessary to repeatedly perform adsorption. During the operation of the system, the pressure requirement is not high, and the application of the adsorbent is environmentally friendly and will not cause poisoning problems. The use time of activated carbon is long, and the treated vapor can be quickly treated with activated carbon to ensure that the waste gas can be discharged and meet national requirements and standards. For the vapor mixed system, the temperature and adsorption process can be controlled from multiple angles to ensure the separation speed of different substances in the vapor. By using the vapor recovery technology combined with condensation and adsorption, the vapor recovery rate is high, the liquefaction effect is good, and the economic benefits can be maximized. The most important thing is that the reasonable application of this technology will not occupy too much area, and the vapor recovery process can be automated. During vapor recovery, relevant personnel can use remote control to remotely control the entire process. Because the vapor channels are mostly set up separately, and the channels are always in a closed space, the probability of contact with the outside world is small. The internal equipment is only the cooling coil, and the compressor and other equipment are explosion-proof during the operation stage, and the possibility of contact with vapor is small. During the operation process, the device can always be in a safe and stable state, and the safety risk is relatively small.

In summary, with the rapid development of social economy, environmental problems are becoming more and more serious, people's environmental awareness is gradually increasing, and they pay more and more attention to environmental protection. In addition to improving the production environment, vapor recovery can also reduce the emission of harmful gases, which is conducive to improving the overall benefits of enterprises. Therefore, in order to ensure the safe production of oil depots, relevant personnel should strengthen the use of condensation and adsorption combined vapor recovery technology, combine actual production conditions, continuously optimize and improve the technology, and strengthen management to ensure the smooth operation of various equipment and truly achieve the goal of energy conservation and emission reduction.