A cleaning method for efficient descaling of oil field boiler convection section

Abstract

The invention relates to a cleaning method for efficient descaling of a convection section of an oil field boiler. The cleaning method comprises the following steps that a penetrating agent is sprayed, a corrosion inhibitor is sprayed, and high-pressure washing is conducted. According to the cleaning method, the chemical reagent is used for loosening scale firstly, then the scale is washed with water containing a neutralization cleaning agent, and the pressure and flow of high-voltage water flow are reduced, so that damage to the convection section in the cleaning process is greatly reduced, and the scale removing efficiency is effectively improved; and meanwhile, since the scale is acidic materials, the chemical reagent is added to neutralizing acid liquid formed during washing, and chemical damage to the convection section in the cleaning process is reduced.

Description

technical field [0001] The invention belongs to the field of oil field equipment cleaning, and in particular relates to a cleaning method for efficient descaling of a convection section of an oil field boiler. Background technique [0002] Oilfield steam injection boilers burn oil for a long time, and there are many situations such as incomplete combustion and operation below the dew point during operation. Over time, serious ash accumulation problems are caused in the convection section (heating surface), and the ash accumulation on the fins is hard and difficult to deal with. Fouling causes flue blockage and poor heat transfer effect, seriously affecting operating economy and safety. [0003] At present, methods such as dry ice blasting, sandblasting, compressed air, and manual cleaning are used to clean the convection section of oilfield boilers, but the effect is poor; of course, high-pressure water guns are also used to directly clean the convection section. The compos...

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Problems solved by technology

[0002] Oil field steam injection boilers burn oil for a long time, and there are many situations such as incomplete combustion and operation below the dew point during operation. Over time, serious ash accumulation problems are caused in the convection section (heating surface), and the ash accumulation on the fins is hard and difficult to deal with.

Fouling causes flue blockage and poor heat transfer effect, seriously affecting operating economy and safety

[0003] At present, methods such as dry ice blasting, sandblasting, compressed air, and manual cleaning are used to clean the convection section of oilfield boilers, but the effect is poor; of course, high-pressure water guns are also used to directly clean the convection section. The composition of the high-pressure jet is complex and hard, and it is difficult to remove. The high pressure of the direct high-pressure jet will cause damage to the equipment. At the same time, the high-pressure jet device requires a manual hand-held spray gun. The recoil force caused by the high-pressure water flow is large, and it is not easy to operate.

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