Condensation recycling method of oil gas

A condensation recovery, oil and gas technology, applied in the direction of steam condensation, separation methods, chemical instruments and methods, etc., can solve the problems of reducing the concentration of brine, increasing operating costs, etc., to increase the contact area, reduce operating costs, and reduce one-time investment Effect

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the oil and gas are not pre-cooled, but directly condensed with brine, and the water vapor in the oil and gas is precipitated in the form of water and dilutes the brine, which is the coolant, so that the concentration of brine is quickly reduced, which requires continuous replenishment of brine to Ensure the concentration of brine so as to reach the temperature required for oil and gas condensation, thus greatly increasing the operating cost of the device

Method used

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Examples

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Effect test

Embodiment 1

[0027] The concentration of oil gas discharged from a gasoline loading process is 750g / Nm 3 (Based on non-methane total hydrocarbons), the temperature is about 30°C. With a mass concentration of 30% CaCl 2 The solution is a refrigerant. Main operating conditions: vacuum degree before the gas-liquid two-phase flow pump is -0.15MPa, pressure after the pump is 0.4MPa (gauge pressure), and the temperature of the refrigerant is -50°C. All the raw material oil and gas are pre-cooled by heat exchange with the circulating refrigerant discharged from the oil / coolant / gas three-phase separator, and the pre-cooled oil and gas enter the oil / water / gas three-phase separator to separate the water, and further The refrigerant is used for condensation recovery, and the oily sewage is discharged to the sewage treatment plant after being treated up to the standard. The oil phase discharged from the oil / brine / gas three-phase separator is directly sold as a product or sent to the gasoline tank, ...

Embodiment 2

[0030] A certain gasoline oxidative sweetening tail gas and liquid hydrocarbon oxidative sweetening tail gas, the temperature is about 30°C, and the concentration of non-methane total hydrocarbons is 500g / Nm 3 . With a mass concentration of 30% CaCl 2The solution is a brine, and the main operating conditions are: gas-liquid two-phase flow vacuum before the pump is -0.15MPa, the pressure after the pump is 0.4MPa (gauge pressure), and the temperature of the low-temperature brine is -50°C. The oil and gas are pre-cooled by heat exchange with the circulating refrigerant discharged from the oil / basic refrigerant / gas three-phase separator. The refrigerant is condensed and recovered, and the oily sewage is sent to the sewage treatment plant for standard treatment before discharge. The oil phase discharged from the oil / brine / gas three-phase separator enters the refining device for further processing, the non-condensable gas is discharged into the oil and gas post-processing device f...

Embodiment 3

[0033] A sulfur-containing sewage tank discharges waste gas at a temperature of about 30°C. After pretreatment to remove sulfide in the waste gas, the oil and gas concentration is 400g / Nm 3 . With a mass concentration of 30% CaCl 2 The solution is a refrigerant with a cooling temperature of -40°C. Other operating conditions: gas-liquid two-phase flow vacuum before the pump is -0.15MPa, and the pressure after the pump is 0.4MPa (gauge pressure). The oil and gas are exchanged and pre-cooled with the circulating refrigerant discharged from the oil / water / gas three-phase separator, and the pre-cooled oil and gas enter the oil / water / gas three-phase separator to separate the water, The solvent is condensed and recovered, and the oily sewage is sent to the sewage treatment plant to be treated up to the standard before being discharged. The oil phase discharged from the oil / brine / gas three-phase separator enters the refining device for further processing, the non-condensable gas is ...

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Abstract

The invention relates to a condensation recycling method of oil gas, belonging to the field of environmental protection and energy saving technique. According to the invention, a gas-liquid two phase flow pump simultaneously pumps a low temperature cool-carrying agent and the oil gas, the gas phase is cut into micro bubbles by a high-speed spinning impeller, the gas-liquid contact area is increased, the oil gas is cooled rapidly, the oil gas is converted into the liquid phase in the pump body and pipeline under pressure, thus the purpose of recycling the oil gas resource is achieved. The processed non-condensable gas enters an oil gas post-processing unit for further processing, and the cool-carrying agent is recycled. The method has the advantages of simple process technology, and low investment of devices. The method is suitable for recycling waste gas having high concentration of oil gas.

Description

1. Technical field [0001] The invention provides a method for oil and gas condensation recovery, which belongs to the technical field of environmental protection and energy saving. 2. Background technology [0002] In petrochemical, coating, transportation and other fields, various volatile organic compounds volatilize high concentrations of organic vapors in the process of production, storage, transportation, sales and use, such as gasoline, naphtha and benzene, which not only waste resources , and pollute the environment, and leave a significant fire or explosion hazard. At present, the oil and gas recovery methods include absorption method, adsorption method, condensation method and membrane separation method, some of which also include compression process or comprehensive utilization of several methods. In the process of oil and gas recovery by adsorption method, adsorption heat is generated, which endangers the safety of operation. The concentration of non-methane tot...

Claims

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Application Information

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IPC IPC(8): C10G5/06B01D5/00
Inventor王明星廖昌建齐慧敏王海波刘忠生
OwnerCHINA PETROLEUM & CHEM CORP