Heat recovery type oil gas recovery device adopting condensation and temperature swing adsorption and pressure swing adsorption combined technology

Abstract

The invention discloses a heat recovery type oil gas recovery device adopting condensation and temperature swing adsorption and pressure swing adsorption combined technology. The device comprises a first refrigerating system, a second refrigerating system, a third refrigerating system, an oil gas condensation and oil product collecting system and a heat recovery type adsorption system, wherein thethird refrigerating system is an overlapped type refrigerating system and is used for supplying a lower-temperature cold source to condense light hydrocarbon components in oil gas. Three-stage condensation is adopted for condensing oil gas and recovering oil products; an activated carbon pressure swing adsorption mode is adopted for deeply purifying oil gas to meet discharge requirements; heat sources of the refrigerating systems are utilized for completing desorption through a vacuum mode; and free cold sources of the refrigerating systems are utilized for enhancing the adsorption effect. The device disclosed by the invention has the advantages that the energy utilization rate is improved, the cold capacity and the heat capacity of the oil gas are fully utilized for performing exchange,the cold sources and the heat sources generated by the refrigerating systems are utilized for supplying cold capacity and heat capacity for adsorption and desorption to form optimal operation states of low-temperature adsorption and high-temperature desorption, the efficiency is high, the energy is saved, and the advantages of pressure swing adsorption and temperature swing adsorption are combined.

Description

technical field [0001] The invention relates to the technical field of oil and gas recovery systems, in particular to an oil and gas recovery device with heat recovery condensation and temperature-swing-pressure-swing adsorption combined process. Background technique [0002] To meet the oil and gas discharge standards stipulated by the state, oil and gas recovery and treatment devices must be installed to recover and process the light hydrocarbon components in oil and gas. The existing oil and gas treatment methods include condensation, absorption, adsorption and membrane methods. Among them, the condensation method can liquefy and recover most of the light hydrocarbon components in oil and gas, but to meet the increasingly stringent national and local emission standards, a high degree of cryogenic cooling is required, but this method will pay a large price for power consumption; and The activated carbon adsorption method can just complete the deep purification of the conde...

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Problems solved by technology

[0003] At present, the mainstream activated carbon adsorption methods mainly include pressure swing adsorption and temperature swing adsorption. However, these two adsorption methods have their own advantages and disadvantages. The adsorption efficiency is greatly affected by temperature, and it is difficult to achieve the best performance in practical applications; the temperature swing adsorption completes desorption through high temperature, and the desorption is relatively clean, but the life of activated carbon is short and the operating cost is high

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