Waste heat two-stage recovery type split steam generator

Abstract

The invention provides a steam generating device. The steam generating device is that a split steam generator and an afterheat recovering device are integrally structured, so that the device is compact, easy to be maintained and small in smoke backpressure; an oil-gas double combustion device meets an oil-gas two-purpose mode according to an independent nozzle; short flame can be generated and uniformly distributed; a steam generating folding pipe is a layering disc type snake-shaped folding pipe which achieves efficient heat exchange under horizontal baffling and vertical reversing, so that the steam can be rapidly generated; in addition, the folding pipe has the excessive freshwater protection performance and can ensure reliable cooling and prevent the heating surface from salt deposit the folding pipe can be an inner threaded steel pipe to avoid film boiling of the freshwater; meanwhile, the a medium folding pipe is a double-layer pipe which avoids corrosion; a steam generation control system can automatically control the flow rate of mediums in the folding pipe and the oil-gas double combustion device and can protect the folding pipe from excessive temperature and excessive pressure; a first-stage cooler can achieve forced circulating liquid cooling of a combustion body and be matched with a second-stage heat medium device to achieve two-stage afterheat recovery; after spraying and purging, the smoke and ash can be regularly automatically cleaned.

Description

technical field [0001] The invention relates to a steam generating device for heavy oil platforms in the field of offshore oil engineering, in particular to a waste heat two-stage recovery type split steam generating device and its control system matched with thermal recovery and steam injection technology in offshore oil fields. Background technique [0002] At present, offshore oilfields have proven considerable heavy oil reserves, but heavy oil is extremely difficult to exploit due to its high content of heavy components, high viscosity, and poor fluidity. The research and application of thermal recovery and steam injection technology for heavy oil on offshore platforms has just begun Many aspects are immature or in the stage of sea trials, which have become the key factors restricting the economic and effective development of offshore heavy oil. Therefore, it is very necessary to carry out research on key technologies such as steam generation devices related to offshore ...

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Problems solved by technology

[0003] At present, oilfield steam injection generating devices matching the onshore heavy oil oilfield thermal recovery technology have appeared, and have been tested and applied in oilfields such as Xinjiang, Liaohe, and Shengli. The steam injection generating device has the characteristics of too large volume, heavy weight and complicated supporting process, and the offshore oil field platform is limited by the space cost, making it impossible to directly transplant and apply

Looking at the thermal recovery of offshore oilfields at home and abroad, considering the economic benefits and benefits of development, there is no perfect technical system for large-scale development in offshore heavy oil oilfields. It is in the testing stage, and there is no mature product suitable for large-scale thermal recovery steam generation equipment in China, and relevant research needs to be systematically carried out to meet the needs of large-scale thermal recovery and simultaneous injection of multiple wells in the future

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