A centralized overheating system for wet steam injection boilers in oilfields

Abstract

A centralized overheating system for wet steam injection boilers in oilfields. A steam-water separator is installed at the rear of the wet steam injection boiler, and the steam outlet of the wet steam injection boiler is connected to the steam inlet of the steam-water separator; There are mixing balancers and reheating superheating boilers; the number of mixing balancers is one or more; the reheating superheating boiler includes one or more superheating sections, and when there are multiple superheating sections, one of the superheating sections adopts radiation type The superheater is equipped with a burner on the radiant superheater, and convection superheaters are used in the rest of the superheating sections; a waste heat recovery section is installed at the rear of the superheating section of the reheating superheating boiler. The invention realizes the centralized superheating of steam for the first time, and only one newly designed reheating superheating boiler can meet the centralized steam superheating of multiple wet steam steam injection boilers in the steam injection station, which not only effectively reduces the input of equipment and construction costs , and can efficiently produce superheated steam to meet production needs.

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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