Device for performing reduction treatment on drilling waste water by using diesel exhaust and treatment method thereof

Abstract

The invention discloses a device for performing reduction treatment on drilling waste water by using diesel exhaust and a treatment method thereof, and belongs to a device and a method for treating the drilling waste water. The device comprises a rotary evaporator (1) and a heat exchange muffler (3). In the unit and the method, the exhaust of a drilling diesel is taken as a heat source without additional fuel supply, so the diesel exhaust is reasonably used, and the cost is low. Simultaneously, vapour evaporated from the drilling waste water can be recovered in a form of distilled water through the unit for additional use; and the drilling waste water after the reduction and concentration treatment is carried away to reduce the pollution to the environment. The device has the advantages of reduction treatment for the drilling waste water, the recovery of the distilled water, the utilization of the exhaust of the drilling diesel reasonably and thoroughly and the use of the rotary evaporator, simple treatment process flow, high efficiency, simple unit structure, wide application range and suitability for various drilling and exploration places.

Description

technical field [0001] The invention relates to a treatment device and method for petroleum drilling sewage, in particular to a device and a treatment method for treating drilling sewage by reducing the amount of exhaust gas from a diesel engine. Background technique [0002] Diesel units are an indispensable power source for drilling operations. The well site is routinely equipped with four units greater than 1000kVA, and two units work normally in each shift. Flue gas emission per diesel unit: 15480m 3 / h, outlet temperature: 540 degrees. At present, the thermal efficiency of conventional internal combustion engines is generally 20% to 40% (20% to 30% for gasoline engines, and 30% to 40% for diesel engines). Most of the heat of fuel combustion is lost in the atmosphere in the form of waste heat through exhaust gas, heat transfer medium and thermal radiation of the body. This not only causes a waste of energy, but also becomes an important reason for internal combustion ...

AI Technical Summary

Problems solved by technology

The treatment of drilling sewage has been studied abroad earlier, and the treatment methods are also various. The commonly used methods include direct discharge into the annular space of safe formations or wellbore, backfill treatment, solidification treatment and mechanical separation, etc., which are often used in drilling sites. Primary concrete is used to treat drilling sewage, but due to the complexity and variability of drilling sewage, its treatment effect is not ideal. At the same time, due to the particularity of drilling operations, advanced sewage treatment processes are often difficult to implement in terms of equipment and operability. Many oil and gas fields store drilling sewage in the well fluid pool of the waste gas station with a large area. Once the sewage leaks or leaks, it will cause serious environmental pollution. Therefore, the treatment and suppression of drilling sewage is the concern of all oil and gas field construction units question

[0003] In response to the above problems, corresponding measures have been taken at home and abroad, especially the drilling wastewater of national teams such as the United States and the former Soviet Union have done more detailed research. The main methods can be summarized as: physical methods, chemical methods, physical and chemical methods, etc. Among them, physical methods and chemical methods have excellent treatment effects, but there are many problems in how to screen and develop suitable coagulants, flocculants and treatment processes in terms of equipment and operability, which limits their application in drilling and exploration. Wide application in

[0004] In recent years, a number of domestic oil exploration units have also conducted research on drilling sewage, and considered adopting some low-cost, high-effective measures to treat drilling sewage to reduce pollution to the surrounding environment of drilling exploration, such as the one disclosed in Chinese patent 200710049484.9 The method of treating drilling waste liquid with diesel engine exhaust gas uses diesel exhaust gas as the heat source for evaporation of drilling sewage, and achieves the purpose of evaporating and concentrating drilling sewage through the convection of diesel engine exhaust gas in the drying tower, but due to its evaporation method, it cannot be evaporated from drilling sewage The water vapor produced is recovered, and the utilization rate of diesel engine exhaust is low, so this method cannot meet the requirements for the treatment of drilling sewage in actual drilling exploration sites.

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