Concentrated superheating system for wet steam injection boilers of oil field

Abstract

The invention discloses a concentrated superheating system for wet steam injection boilers of an oil field. Steam separators are installed on the back portions of the wet steam injection boilers correspondingly, and steam outlets of the wet steam injection boilers communicate with steam inlets of the steam separators. Mixed balancers and reheated type superheating boilers are installed on the back portions of the steam separators in sequence. The number of the mixed balancers is one or multiple. Each reheated type superheating boiler internally comprises one or more superheating sections, when the number of the superheating sections is multiple, one of the superheating sections is provided with a radiant superheater, a burner is installed on the radiant superheater, and the rest of the multiple superheating sections are provided with convection type superheaters. Waste heat recovery sections are additionally installed on the back portions of the superheating sections of the reheated type superheating boilers. According to the concentrated superheating system for the wet steam injection boilers of the oil field, concentrated superheating of steam is achieved for the first time, and moreover the requirement for steam concentrated superheating of the multiple wet steam injection boilers inside a steam injection station can be met only through one reheated type superheating boiler with the novel design; not only are the invested expenses of equipment and construction reduced effectively, but also superheated steam can be produced efficiently so as to meet the production requirement.

Description

technical field [0001] The invention belongs to the technical field of oilfield heavy oil thermal recovery, in particular to a centralized overheating system for an oilfield wet steam steam injection boiler. Background technique [0002] For oilfield heavy oil thermal recovery technology, wet steam injection boilers are used to produce steam with a dryness of 75±5%, and the steam is injected into the oilfield steam injection dry network, and then the steam is distributed and injected into wells as required Production. At present, according to the needs of oilfield development, some steam injection stations are usually established, and each steam injection station includes 2 to 10 wet steam steam injection boilers. [0003] In recent years, with the yearly consumption of easily exploitable crude oil resources, conventional heavy oil thermal recovery equipment and processes sometimes cannot meet the actual production needs. When deep heavy oil is exploited, due to the substa...

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Problems solved by technology

However, the above-mentioned transformation plan cannot be adapted to all types of wet steam injection boilers. Even if the wet steam injection boilers meet the transformation conditions, due to the long transformation period, the production cannot be maintained during the transformation period, and the shutdown of the oil field will bring immeasurable economic benefits. loss

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