An indirect oil and gas condensation recovery device and its recovery process

Abstract

The invention introduces an indirect oil and gas condensation recovery device and its recovery process. The recovery device includes: an oil and gas delivery system, a cooling system and a low-temperature refrigeration system; the oil and gas delivery system includes a precooler, a shallow cooler and a deep cooler ; The load-cooling system includes a first load-cooling cycle loop, a second load-cooling cycle loop and a third load-cooling cycle loop; the low-temperature refrigeration system includes a compressor, an oil-gas separator, a condenser gas-liquid separator, Plate heat exchanger, expansion valve, evaporator, etc.; the recovery process of this indirect oil and gas condensation recovery device uses a refrigeration system to complete the temperature control of the entire oil and gas condensation stage, and the oil and gas condensation process goes through the pre-cooling stage, shallow cooling stage and deep cooling stage in sequence , using the refrigerant in the cryogenic stage and the outlet low-temperature oil and gas to obtain cooling capacity through heat exchange, and the cooling capacity of oil and gas is effectively recycled, reducing the overall energy consumption of the refrigeration system and reducing the operating costs of the enterprise.

Description

technical field [0001] The invention belongs to the technical field of oil and gas recovery, and in particular relates to an indirect oil and gas condensation recovery device and a recovery process thereof. Background technique [0002] Petroleum series products have a lot of loss and waste during storage and transshipment. Oil and gas include a variety of hydrocarbon organic compounds. Improper handling will form chemical smog, which not only endangers safe production but also pollutes the environment. In recent years, the research and engineering on oil and gas recovery and utilization have received extensive attention. 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. Currently, the existing oil and gas treatment There are four methods: condensation method, absorption method, adsorption method and membrane separation metho...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this method is that the oil and gas flow rate and temperature in the oil and gas treatment place vary greatly, which means that the load of oil and gas treatment varies greatly, which will lead to unstable operation of the refrigeration system and greatly affect the performance of the refrigeration system; It is an indirect cooling method that uses heat exchange between the brine and oil and gas, and can respond to changes in the oil and gas load by adjusting the temperature and flow of the brine, so that the system can operate stably

[0004] However, in the existing oil and gas recovery methods using brine, the system structure is often very complicated, and multiple refrigeration systems need to be designed to provide oil and gas treatment temperatures at different stages, and the control of the system is correspondingly much more complicated, and the energy consumption is relatively high , and does not consider the recovery of cooling capacity, the operating cost is relatively high

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