Liquid-state CO2 washing method of petroleum industry oil dirt equipment and facilities

Abstract

The invention discloses a liquid-state CO2 washing method of petroleum industry oil dirt equipment and facilities. Liquid-state CO2, a storing device, a conveying pipeline, a spraying device and an oil receiving groove bag are involved in the method. The method is characterized in that the characteristics of ultralow viscosity, ultra-strong mobility, ultra-strong permeability and ultra-strong adsorption property of the liquid state CO2 are utilized, and the flexible conveying pipeline and the spraying device strip and eliminate oil dirt rapidly and thoroughly at a time and collects and recycles the oil dirt for fixed or movable oil dirt oil field equipment or devices in the manner of extending in the single direction from top to bottom and from inside to outside. Compared with the prior art, oil dirt waste is not generated in the washing process, sewage containing oil and chemical agent and needing secondary treatment is not generated, new toxic and harmful substance is not generated,contaminant does not fall to the ground, the cleaning effect is thorough, fallen oil can be recycled, operation is simple, the cost is low, and the method is safe and environmentally friendly and hasgood application and popularization value.

Description

1. Technical field: [0001] The invention relates to the removal of oil stains in the process of using, maintaining, maintaining, repairing, rotating, replacing, and dismantling of oil polluted equipment and facilities in the petroleum industry, so as to prevent oil polluted from falling on the ground and pollute the environment, and to recycle, specifically, a Liquid CO for oil pollution equipment and facilities in the petroleum industry 2 the cleaning method. 2. Background technology: [0002] In the process of crude oil production in oil fields, a large number of equipment and facilities are in direct or indirect contact with crude oil, and a large amount of oil stains are attached. Oil must be removed. In the prior art, methods such as packaging and isolation of plastics and other film products, wiping of fiber foam products, and cleaning with chemical cleaning agents are used for disposal. These methods all exist: 1. The removal process is cumbersome, time-consuming a...

AI Technical Summary

Problems solved by technology

These methods all exist: 1. The cleaning process is cumbersome, time-consuming and labor-intensive, and the cleaning is not easy to complete, which is easy to cause damage and corrosion, and destroys the smoothness of the surface of the integrity of the parts.

2. The cleaning process will produce a large amount of viscous oil film, foam, and fiber garbage, which will bring more troubles for further follow-up disposal

3. Discarded solids and leaked sewage will directly pollute the land environment

4. The collection, concentration, harmless treatment and recycling of dirt and sewage require more special equipment and technologies

Bring more extra work to the oil extraction work, which seriously affects the production cost of crude oil

Images